WORKING MACHINE

A working machine includes a machine body, a cabin which is provided on the machine body and in which an operator's seat where an operator sits is provided, a hood provided behind the cabin, and a condenser for an air conditioner to adjust a temperature inside the cabin, wherein the condenser is provided above the hood such that the condenser faces a lower portion of a rear surface of a rear panel of the cabin.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates to a working machine such as a small hydraulic shovel (backhoe).

2. Description of the Related Art

A working machine equipped with an air conditioner that cools the interior of a cabin is known.

For example, Japanese Unexamined Patent Application Publication No. 2019-019572 discloses a configuration in which a radiator and an oil cooler are located upstream of a fan that causes cooling air to be taken in an engine room and in which a condenser for an air conditioner is located upstream of the radiator and the oil cooler.

Japanese Unexamined Patent Application Publication No. 2013-244910 discloses a configuration in which a container is provided at a lower portion of a rear wall of a cabin by recessing the rear wall toward the cabin. In the container, a condenser for an air conditioner and so forth are contained.

SUMMARY OF THE INVENTION

However, in PTL 1, since the condenser is provided at the most upstream position in the direction in which the cooling air flows into the engine room, there is a problem in that an increase in the temperature of the cooling air caused by the condenser leads to thermal effects, such as a decrease in the cooling performance of the oil cooler and the radiator and an increase in the temperature of the cooling air in the engine room, on a main machine (working machine).

In the technique described in Japanese Unexamined Patent Application Publication No. 2013-244910, since the container, in which the condenser for an air conditioner and the like are contained, is formed in such a manner as to be recessed from the rear wall portion of the cabin toward the cabin, the space inside the cabin is reduced, and the comfort of the cabin deteriorates. There is another problem in that the heat generated by the condenser or the like may easily be transferred to the cabin through a wall portion of the container in which the condenser for an air conditioner and the like are contained.

Example embodiments of the present invention make it possible to prevent or reduce a thermal effect of a condenser of an air conditioner on a working machine without deteriorating the comfort of a cabin.

A working machine includes a machine body, a cabin which is provided on the machine body and in which an operator's seat where an operator sits is provided, a hood provided behind the cabin, and a condenser for an air conditioner to adjust a temperature inside the cabin, wherein the condenser is provided above the hood such that the condenser faces a lower portion of a rear surface of a rear panel of the cabin.

The condenser may be positioned such that an upper surface thereof is inclined downward in a rearward direction.

The rear panel may be provided with a rear window made of a see-through material. An upper end of the condenser may be lower than a midpoint between upper and lower ends of the rear window and lower than an upper end of a backrest portion of the operator's seat.

The condenser may be positioned inward of an outer edge of the machine body in plan view.

The working machine may further include a support frame in the hood to support the hood, a bracket to support the condenser, and a bracket support member fixed to the support frame and extending through the hood to support the bracket above the hood.

The hood may have a hole portion to allow at least one air-conditioning hose to be guided therethrough, the at least one air-conditioning hose being at least one hose to allow a refrigerant for the air conditioner to flow therethrough.

The working machine may further include a fan to cool the condenser, the fan being provided on or above the hood such that the fan faces the condenser.

The working machine may further include a fan to cool the condenser, the fan being provided on or above the hood such that the fan faces the condenser. The bracket may support the condenser and the fan.

The fan may be an electric fan. The hood may have a hole portion to allow at least one air-conditioning hose and at least one harness to be guided therethrough, the at least one air-conditioning hose being at least one hose to allow a refrigerant for the air conditioner to flow therethrough, the at least one harness being connected to the electric fan.

The working machine may further include an accommodating member to contain the condenser and the fan. The accommodating member may have air inlets which allow air for cooling the condenser to enter the accommodating member, the air inlets being provided in left and right side surfaces of the accommodating member, and an air outlet which allows air that has been used to cool the condenser to be discharged diagonally upward and rearward, the air outlet being provided in a rear surface of the accommodating member, the rear surface being inclined downward in a rearward direction.

The rear surface of the accommodating member that has the air outlet may be inclined downward in the rearward direction. The condenser may be inclined downward in the rearward direction and faces the air outlet. The fan may be provided at a front side of the condenser and configured to blow air diagonally upward and rearward toward the condenser.

The working machine may further include a sight glass used to check a state of an air-conditioning gas used in the air conditioner, the sight glass being positioned such that the sight glass is seen from an outside of the accommodating member through at least one of the air inlets.

The working machine may further include a support frame in the hood to support the hood, and a bracket to support the condenser and the fan above the hood. The support frame may include a bracket support member provided at an upper portion of the support frame and extending through the hood to support the bracket above the hood.

A receiver to store a refrigerant for the air conditioner may be provided on one side of the condenser in the accommodating member.

The rear panel may be provided with a rear window made of a see-through material. An upper end of the condenser may be lower than a midpoint between upper and lower ends of the rear window and lower than an upper end of a backrest portion of the operator's seat.

The condenser may be positioned inward of an outer edge of the machine body in plan view.

The hood may have a hole portion to allow the bracket support member to extend therethrough.

The working machine may further include a receiver to store a refrigerant for the air conditioner. The bracket may support the receiver.

The bracket support member may be a boss member fixed to an upper surface of the support frame.

DETAILED DESCRIPTION OF THE EXAMPLE EMBODIMENTS

An embodiment of a working machine1of the present invention will be described below with reference to the drawings.

Note that the embodiment, which will be described below, is an example in which the present invention is embodied, and the configuration of the present invention is not limited to the specific example. However, in the present embodiment, a backhoe1will be described as an example.

FIG.1toFIG.16and the like illustrate the backhoe1, which is an example of the working machine1.

In the following description of the present embodiment, the side toward which an operator O in an operator's seat27in a cabin5faces is referred to as the front side of the backhoe1, and the rear side of the operator O is referred to as the rear side of the backhoe1. The right-hand side of the operator O is referred to as the right-hand side of the backhoe1, and the left-hand side of the operator O is referred to as the left-hand side of the backhoe1. The horizontal direction that is perpendicular to the front-rear direction of the backhoe1will be referred to as a machine-body width direction.

When the working machine1is viewed in plan view, the working machine1is turnable about a turning axis X1. The turning axis X1is an axis that vertically extends in such a manner as to pass through the center of a slewing bearing7. A centerline of the working machine1when the working machine1is viewed in plan view will be denoted by Y1. The centerline Y1is a line that passes the turning axis X1and extends in the front-rear direction. As illustrated inFIG.1toFIG.4and the like, the backhoe1includes an upper turnable body2and a lower traveling body3. The upper turnable body2includes a machine body4, the cabin5, and a working device6. The upper turnable body2(the machine body4) is mounted on the lower traveling body3in such a manner as to be turnable around a vertical axis of the slewing bearing7. A weight8is provided on a rear portion of the machine body4. The lower traveling body3includes a traveling frame9, a crawler traveling device10, and a dozer device11. The traveling device10may be a tire traveling device.

The working device6is positioned in front of the cabin5. The working device6is attached to the machine body4. The working device6includes a boom12that is driven by a boom cylinder17, an arm13that is driven by an arm cylinder18, and a bucket (a working tool)14that is driven by a bucket cylinder19.

A prime mover20is provided in an engine compartment21of the machine body4, the engine compartment21being provided at a position behind and below the cabin5. The prime mover20is horizontally placed in the engine compartment21. Note that, when the prime mover is horizontally placed, the axis of a crankshaft of the prime mover20extends in the machine-body width direction. Note that this placement position of the prime mover20is an example.

In the present embodiment, the prime mover20is a diesel engine. Note that the prime mover20may be a gasoline engine, an LPG engine, or an electric motor or may be a hybrid prime mover that includes an engine and an electric motor.

As illustrated inFIG.4, in the engine compartment21, the prime mover20, a radiator G1, and an oil cooler O1are arranged in this order from the side where a center portion of the backhoe1is located toward the outside in the machine-body width direction. The radiator G1is a cooler that cools cooling water of the prime mover20. The radiator G1is provided with a cooling fan that cools the cooling water flowing through the radiator G1. The oil cooler O1is a cooler that cools a hydraulic fluid.

As illustrated inFIG.1,FIG.2,FIG.3, andFIG.5, the machine body4includes the cabin5capable of accommodating the operator (a driver) O. The cabin5includes a front panel22provided on the front surface thereof, a rear panel23provided on the rear surface thereof, a roof panel24provided on the upper surface thereof, a side panel25provided on the right side surface thereof, and a door panel26provided on the left side surface thereof.

The front panel22is provided with a front window22a. The rear panel23is provided with a rear window23athat is made of a see-through material. The side panel25is provided with a right side window25a. The door panel26is provided with a left side window26a. Accordingly, the operator O in the cabin5can visually recognize the outside from the inside of the cabin5through the front window22a, the rear window23a, the right side window25a, and the left side window26a.

As illustrated inFIG.4, the operator's seat (a seat)27where the operator (the driver)0sits and a manipulator28are provided in the cabin5. In the machine-body width direction of the machine body4, the cabin5is positioned on the left side of the centerline Y1, which passes the turning axis X1and extends in the front-rear direction. A hood29is provided behind the cabin5. The hood29projects rearward.

As illustrated inFIG.6toFIG.16and the like, the hood29is supported by a support frame30provided in the engine compartment21and is shaped so as to cover the support frame30. The support frame30includes a plurality of leg members (a first leg31a, a second leg31b, and a third leg31c) and a beam member32. Each of the plurality of leg members are arranged in a standing manner at positions behind a partition plate4eof a slewing board4a. The beam member32is fixed to upper portions of the plurality of leg members31ato31c.

As illustrated inFIG.7, the hood29includes a hood center29a, a rear hood29b, a left side hood29c, and a right side hood29d. The hood center29ais a cover member that forms an upper portion and a front portion of the engine compartment21, and the interior (the inside) of the cabin5and the engine compartment21are isolated from each other by the hood center29a. The rear hood29bis a cover member that forms a rear portion of the engine compartment and is attached to the support frame30. The left side hood29cis a cover member that forms a left portion of the engine compartment21. The right side hood29dis a cover member that forms a right portion of the engine compartment21. The portions of the hood29may be integrally molded with, for example, a resin or the like. Each of the portions of the hood29may be formed of a sheet metal or may be formed by combining a resin and a sheet metal.

As illustrated inFIG.6and the like, the machine body4includes the slewing board (a board)4a, a plurality of vertical ribs (a first vertical rib4band a second vertical rib4c), a support bracket4d, the partition plate4e, and the support frame30. The slewing board4ais formed of a thick steel plate or the like and provided such that the plate surfaces thereof are oriented in the vertical direction. The slewing board4ais supported, so as to be turnable around the turning axis X1, on the lower traveling body3with the slewing bearing7interposed therebetween.

As illustrated inFIGS.2and3and the like, a swing bracket4fis attached to the support bracket4dso as to be swingable around a vertical axis (an axis extending in the vertical direction). A base end of the working device6(the boom12) is attached to the swing bracket4fso as to be pivotable around a horizontal axis.

As illustrated inFIG.6and the like, the partition plate4eis a member that borders a front lower portion of the engine compartment21. The plate surfaces of the partition plate4eare oriented in the front-rear direction, and the partition plate4eis provided at a rear portion of the slewing board4asuch that the partition plate4eextends in a direction from one of opposite sides of the machine body in the machine-body width direction (left side) to the other of the opposite sides of the machine body in the machine-body width direction (right side).

As illustrated inFIG.6and the like, the first leg31aof the support frame30includes a first pillar portion31a1, a first extension portion31a2, a first horizontal portion31a3, and a first vertical portion31a4. The first pillar portion31a1is provided in a standing manner on the left side of a front portion of the engine compartment21and extends in the upward direction. More specifically, the lower end of the first pillar portion31a1is attached to the left side of the rear surface of the partition plate4e. The first extension portion31a2is bent obliquely upward toward the rear side from the upper end of the first pillar portion31a1and extends. The first horizontal portion31a3is bent rearward from the upper end of the first extension portion31a2and extends horizontally. The first vertical portion31a4is bent downward from the end of the first horizontal portion31a3and extends vertically.

As illustrated inFIG.6and the like, the second leg31bincludes a second pillar portion31b1, a second extension portion31b2, and a second horizontal portion31b3. The second pillar portion31b1is provided in a standing manner on the right side of the front portion of the engine compartment21and extends in the upward direction. More specifically, the lower end of the second pillar portion31b1is attached to the right side of the partition plate4e. In other words, the lower end of the second pillar portion31b1is located forward of the first pillar portion31a1. The second extension portion31b2is bent obliquely upward toward the rear side from the upper end of the second pillar portion31b1and extends. The second horizontal portion31b3is bent rearward from the upper end of the second extension portion31b2and extends horizontally. In addition, the second horizontal portion31b3extends horizontally in such a manner as to extend through the beam member32. The second horizontal portion31b3is provided with boss members33.

As illustrated inFIG.6and the like, the third leg31cincludes a third pillar portion31c1and a third horizontal portion31c2. The third pillar portion31c1is provided in a standing manner at the center of the rear portion of the engine compartment21and extends in the upward direction. The third horizontal portion31c2is bent forward from the upper end of the third pillar portion31c1and extends horizontally. The third horizontal portion31c2is provided with other boss members33.

As illustrated inFIG.6and the like, the beam member32is positioned such that the plate surfaces thereof face upward and downward and such that the longitudinal direction thereof coincides with the machine-body width direction. The beam member32includes a first beam member32aand a second beam member32b. The first beam member32ais placed in such a manner as to extend across the upper end of the first horizontal portion31a3, the upper end of the second horizontal portion31b3, and the upper end of the third horizontal portion31c2and is fixed to each of these horizontal portions31a3,31b3, and31c2. More specifically, as illustrated inFIG.6and the like, the first beam member32aextends rightward from the upper end of the first horizontal portion31a3, passes through the third horizontal portion31c2, and reaches the upper end of the second horizontal portion31b3. As illustrated inFIG.16and the like, the second beam member32bextends rightward from the end (the rear end) of the first extension portion31a2and reaches the first vertical portion31a4.

The backhoe1of the present embodiment includes an air conditioner capable of adjusting the temperature inside the cabin5.

The air conditioner includes an evaporator, an air-blowing fan, a compressor, a condenser D1, an electric fan (condenser fan) F1, a receiver R1, and/or the like. These components are connected to one another by pipe(s), and refrigerant flows through them.

The evaporator cools the air that is to be blown into the cabin by exchanging heat between the refrigerant and the air having been blown into the cabin by the air-blowing fan.

The compressor compresses the vaporized refrigerant. The condenser D1is a cooler (condenser) that cools the refrigerant that has been compressed. The receiver R1temporarily stores the refrigerant that has been condensed.

The evaporator and the air-blowing fan are positioned in a lower portion of the cabin5.

In the present embodiment, the electric fan F1, the condenser D1, and the receiver R1of the air conditioner (AC system) are provided behind the cabin5and above the hood center29a. As illustrated inFIGS.2and3and the like, the upper end of the condenser D1is lower than the midpoint between the upper and lower ends of the rear window23aand lower than an upper end of a backrest portion of the operator's seat27. As illustrated inFIG.4and the like, when viewed in plan view, the condenser D1is positioned inward of an outer edge of the machine body4.

As illustrated inFIGS.13to16and the like, the boss members (bracket support members)33to which a bracket34is to be attached are provided at an upper portion of the support frame30. The boss members33are fixed to the support frame30and extend through the hood29to support the bracket34above the hood29. Each of the boss members33is a cylindrical member and is fixed to the upper portion of the support frame30by welding. Each of the boss members33has an internal thread in its tubular portion. The bracket34, which will be described later, is fastened to the boss members33by screwing bolts B1into the boss members33.

In the present embodiment, the second horizontal portion31b3of the second leg31bis provided with boss members33. The two boss members33are arranged in a line along the front-rear direction. The third horizontal portion31c2of the third leg31cis provided with other boss members33. The other two boss members33are arranged in a line along the front-rear direction.

As illustratedFIG.13, four circular hole portions38are provided in a rear portion of the hood center29a. More specifically, these hole portions38are provided at positions corresponding to the boss members33and each have a diameter slightly larger than the outer diameter of a corresponding one of the boss members33such that the boss members33extend through the hole portions38.

The bracket34will now be described. As illustrated inFIG.14and the like, the bracket34includes a support member35that is provided on the hood center29aand a base36to which the condenser D1is attached.

The support member35includes a pair of seal cushions35a, a support plate35b, pillars35c, a first lateral portion35d, a second lateral portion35e, a first holding portion35f, a second holding portion35g, a first vertical portion35h, and a second vertical portion35i.

As illustrated inFIGS.11B and14and the like, the pair of seal cushions35aare provided above the boss members33and are spaced apart from each other in the machine-body width direction. Each of the pair of seal cushions35ais a plate that extends in the front-rear direction and has a rectangular shape when viewed in plan view. The seal cushions35aare seal members to prevent or reduce the discharge of the air from the engine compartment21to the outside through the hole portions38. The pair of seal cushions35ahave hole portions35a1at positions corresponding to the boss members33.

As illustrated inFIGS.11A,11B, and14and the like, the support plate35bis a long plate that is provided on the hood center29a. The support plate35bis a plate that extends in the machine-body width direction and has a rectangular shape when viewed in plan view. The support plate35bextends leftward from the upper surface of one of the pair of seal cushions35athat is closer to the other of the opposite sides of the machine body in the machine-body width direction (right side) and extends beyond the other seal cushion35athat is closer to the one of the opposite sides of the machine body in the machine-body width direction (left side).

The support plate35bhas hole portions at positions corresponding to the boss members33(positions corresponding to the hole portions of the pair of seal cushions35a), and the bolts B1extend through these hole portions. In other words, by fastening the support plate35bto the boss members33, which are provided on the support frame30, using the bolts B1, the support member35is attached to the support frame30. That is, the boss members33support the support plate35bof the support member35from the upper portion of the beam member32through the hole portions38of the hood center29a.

As illustrated inFIGS.11A,11B, and14and the like, the support plate35bhas hole portions35b1. The hole portions35b1are each a hole that has a circular shape when viewed in plan view and are provided at positions corresponding to the boss members33(positions corresponding to the hole portions35a1of the pair of seal cushions35a).

The support plate35bhas, in a region (first region) thereof between the pair of seal cushions35a, a hole portion35b2extending through the support plate35bin the vertical direction. The support plate35bhas a cutout portion35b3in a region (second region) closest to the one of the opposite sides of the machine body in the machine-body width direction (left side). The hole portion35b2has a rectangular shape when viewed in plan view and has a longitudinal direction extending along the machine-body width direction. The cutout portion35b3extends from the front end of the support plate35brearward.

The pillars35cextend upward from the support plate35b. In the present embodiment, the pair of pillars35cextend upward such that they are spaced apart from each other in the machine-body width direction. The left pillar35c1and the right pillar35c2are provided at positions corresponding to the hole portions35b1of the support plate35b, that is, positions corresponding to the boss members33. More specifically, the left pillar35c1and the right pillar35c2are welded to the support plate35band attached to the boss members33by being fastened together with the support plate35busing the bolts B1. The left pillar35c1is attached to the front hole portion35b1that is closer to the one of the opposite sides of the machine body in the machine-body width direction (that is closer to the left side of the machine body) of the support plate35b, and the right pillar35c2is attached to the front hole portion35b1that is closer to the other of the opposite sides of the machine body in the machine-body width direction (that is closer to the right side of the machine body) of the support plate35b.

As illustrated inFIGS.11A,11B, and14and the like, each of the pillars35cextends forward along the upper surface of the support plate35band then is bent obliquely upward and forward, and its upper end portion is bent rearward.

As illustrated inFIGS.11A,11B, and14and the like, the first lateral portion35dis positioned such that the plate surfaces thereof face upward and downward and such that the first lateral portion35dextends in the machine-body width direction. The first lateral portion35dis placed to bridge the gap between the upper end of the left pillar35c1and the upper end of the right pillar35c2and is fixed to these pillars35c1and35c2.

The second lateral portion35eis positioned such that the plate surfaces thereof face upward and downward and such that the second lateral portion35eextends in the machine-body width direction. The second lateral portion35eis provided at the rear end of the upper surface of the support plate35b. The second lateral portion35eis provided with the first holding portion35fat one of opposite ends thereof that is closer to the one of the opposite sides of the machine body in the machine-body width direction (at the left end) and the second holding portion35gat the other of the opposite ends thereof that is closer to the other of the opposite sides of the machine body in the machine-body width direction (at the right end).

The first holding portion35fextends upward from the left end of the second lateral portion35eand is curved obliquely upward and rearward at an intermediate portion thereof. The second holding portion35gextends upward from the right end of the second lateral portion35eand is curved obliquely upward and rearward at an intermediate portion thereof.

The first vertical portion35his a member that is inclined downward in the rearward direction and to which one of opposite end portions (which is closer to the one of the opposite sides of the machine body in the machine-body width direction) (the left end portion) of the base36is attached. The first vertical portion35hextends rearward from one of opposite end portions of the first lateral portion35dthat is closer to the one of the opposite sides of the machine body in the machine-body width direction (the left end portion) and then is bent downward. The first vertical portion35his bent at an intermediate portion thereof to extend obliquely downward and rearward and extends rearward beyond the upper end of the first holding portion35f. The upper end of the first holding portion35fand a lower portion of the first vertical portion35hare joined to each other by, for example, welding or other method or material. In other words, an upper end portion of the first vertical portion35his connected to a left end portion of the first lateral portion35d, and the lower portion of the first vertical portion35his connected to the upper end of the first holding portion35f, so that the first vertical portion35his held by the first lateral portion35dand the first holding portion35fWhen viewed from the side, the intermediate portion of the first vertical portion35his inclined from the upper front to the lower rear.

The second vertical portion35iis a member that is inclined downward in the rearward direction and to which the other of the opposite end portions (which is closer to the other of the opposite sides of the machine body in the machine-body width direction (the left end portion) of the base36is attached. The second vertical portion35iextends rearward from a position in the vicinity of the other of the opposite end portions that is closer to the other of the opposite sides of the machine body in the machine-body width direction (the right end portion) of the first lateral portion35dand then is bent downward. The second vertical portion35iis bent at an intermediate portion thereof to extend obliquely downward and rearward and extends rearward beyond the upper end of the second holding portion35g. The upper end of the second holding portion35gand a lower portion of the second vertical portion35iare joined to each other by, for example, welding or other method or material. In other words, an upper end portion of the second vertical portion35iis connected to a portion near the right end portion of the first lateral portion35d, and the lower portion of the second vertical portion35iis connected to the upper end of the second holding portion35g, so that the second vertical portion35iis held by the first lateral portion35dand the second holding portion35g. When viewed from the side, the intermediate portion of the second vertical portion35iis inclined from the upper front to the lower rear.

The base36is a planar plate to which the condenser D1and the electric fan F1are attached. The base36is attached to an inclined portion of the first vertical portion35hand an inclined portion of the second vertical portion35isuch that the plate surfaces of the base36are each inclined downward in the rearward direction.

More specifically, a left edge portion of the base36is provided with left attachment portions36a1to attach the base36to the first vertical portion35h. The two left attachment portions36a1are arranged in the vertical direction. The left attachment portions36a1have through holes for bolts B1to pass through. The left attachment portions36a1are attached to the first vertical portion35hwith the bolts B1, so that the base36is fixed to the first vertical portion35h.

The left attachment portions36a1have two holes for attachment of left attachment portions D1a1provided at the left edge of the condenser D1. In the present embodiment, a sheet metal member (not illustrated) is bolted to each of the left attachment portions D1a1using the holes36a3in the left attachment portions D1a1of the condenser D1, and an elastic member made of rubber or the like is attached to this sheet metal member. The left attachment portions D1a1of the condenser D1are fixed to the left attachment portions36a1of the base36by bolting such that the elastic member is sandwiched between the sheet metal member and the left attachment portions36a1.

A right edge portion of the base36is provided with right attachment portions36a2for to attach the base36to the second vertical portion35i. The two right attachment portions36a2are arranged in the vertical direction. The right attachment portions36a2have through holes for bolts B1to pass through. The right attachment portions36a2are attached to the second vertical portion35iwith the bolts B1, so that the base36is fixed to the second vertical portion35i.

The right attachment portions36a2have two holes36c4for attachment of right attachment portions D1a2provided at the right edge of the condenser D1. In the present embodiment, a sheet metal member (not illustrated) is bolted to each of the right attachment portions D1a2using the holes36a4in the right attachment portions D1a2of the condenser D1, and an elastic member made of rubber or the like is attached to this sheet metal member. The right attachment portions D1a2of the condenser D1are fixed to the right attachment portions36a2of the base36by bolting such that the elastic member is sandwiched between the sheet metal member and the right attachment portions36a2.

As illustrated inFIG.11B, the electric fan F1is attached to the reverse side (lower front side) of the base36. The electric fan F1is attached such that the electric fan F1matches a through hole36a5at the center of the base36. In other words, the electric fan F1to cool the condenser D1is provided on or above the hood29such that the electric fan F1faces the condenser D1, and the bracket34supports the condenser D1and the electric fan F1.

As described above, the condenser D1is attached to the obverse side (upper rear side) of the base36, and the electric fan F1is attached to the reverse side (lower front side) of the base36, so that the condenser D1and the electric fan F1are mounted such that they are inclined downward in the rearward direction. In other words, the condenser D1is provided above the hood29such that the condenser D1faces a lower portion of the rear surface of the rear panel23of the cabin5. The condenser D1is positioned such that an upper surface thereof is inclined downward in the rearward direction. Note that, in the present embodiment, although the condenser D1is attached to the obverse side (upper rear side) of the base36, and the electric fan F1is attached to the reverse side (lower front side) of the base36, the present invention is not limited as such. For example, the electric fan F1may be attached to the obverse side (upper rear side) of the base36and the condenser D1may be attached to the reverse side (lower front side) of the base36. A fan that is driven by a driving force of an engine, a fan that is driven by hydraulic pressure, or the like may be provided instead of the electric fan F1.

As illustrated inFIGS.10A to11Band the like, the receiver R1is provided such that the receiver R1is closer to the other of the opposite sides of the machine body than the condenser D1is in the machine-body width direction (on the right side of the condenser D1) in an accommodating member44. The receiver R1stores the refrigerant that has passed through the condenser D1. The receiver R1has a cylindrical shape, and in the present embodiment, the receiver R1is positioned on the right side of the condenser D1and provided such that the receiver R1extends in the vertical direction. The receiver R1is attached in an upright position to an intermediate portion of the second vertical portion35ivia a stay50. The condenser D1and the receiver R1are connected to each other by AC hose(s)40. The receiver R1is located behind and at a distance from the cabin5to leave a space where the AC hose(s)40is/are guided in a curved manner.

As illustrated inFIG.13, the hood29has a hole portion39to allow the air-conditioning hose(s)40and harness(es)41to be guided therethrough. The refrigerant for the air conditioner flows through the air-conditioning hose(s)40. The harness(es)41is connected to the electric fan F1. More specifically, the hood center29ahas the hole portion39that has a quadrangular shape and that allows communication between the inside and the outside of the engine compartment21. In the present embodiment, in the hood center29a, the hole portion39is provided at a position corresponding to the cutout portion35b3of the support plate35bwhich is provided above the hood center29a. In other words, the hole portion39is located on the left side of the hole portions38at the center of the hood center29a. The hole portion39is provided between the rear end of the hood center29aand the cabin5(rear panel23).

The hole portion39is connected to the compressor in the hood29and allows the AC hose(s)40, through which the refrigerant flows, and wire(s) (harness(es))41to control the air conditioner to pass therethrough.

As illustrated inFIG.13and the like, the AC hose(s)40and the wire(s)41are guided such that they extend from the hole portion39in the upward direction. The AC hose(s)40and the wire(s)41are guided such that they extend in the rightward direction along the first lateral portion35d. The AC hose(s)40is/are connected to the condenser D1, the receiver R1, and the sight glass R2. As illustrated inFIG.15, the AC hose(s)40is/are guided along the first lateral portion35dof the bracket34by a guide member43. The guide member43is a hook-shaped member that has a J-shaped cross section and is attached to an upper portion of the condenser D1.

As illustrated inFIGS.13to15and the like, an AC hose40aextends in the upward direction from the hole portion39and is bent in the rightward direction. The AC hose40areaches the right upper edge of the condenser D1and is connected to the condenser D1. An AC hose40bis connected to the right lower edge of the condenser D1, and the AC hose40bis guided in such a manner as to be curved in the upward direction and connected to the upper end of the receiver R1. Another AC hose (an AC hose40c) is connected to the receiver R1, and the AC hose40cis provided in such a manner as to extend linearly forward. In addition, the AC hose40cis provided with the sight glass R2. The AC hose40cpasses through the sight glass R2, is bent in the leftward direction, is guided along the first lateral portion35d, is bent downward, and inserted into the hole portion39. Note that the sight glass R2is positioned at approximately the same height as the upper end of the receiver R1and is provided so as to be visible through a right second opening45b(second air inlet46b). In other words, the sight glass R2to check the state of an air-conditioning gas is positioned such that the sight glass R2is seen from the outside of the accommodating member44through at least one of air inlets46.

Note that a seal member42including an elastic member made of rubber or the like is received in the hole portion39which has a quadrangular shape. The seal member42is mounted such that it is pressed down from above by attaching a plate-shaped member to the support member35and prevent or reduce entry of rainwater, dust, and the like into the engine compartment21through the hole portion39.

For convenience of description, the configuration of the condenser D1(the condenser D1, the bracket34, the receiver R1, and so forth) assembled as illustrated inFIG.15will be described below as a condenser D1assembly. As illustrated inFIG.15, the backhoe1appears to carry the condenser D1assembly.

As illustrated inFIGS.1to16and the like, the condenser D1assembly is covered with an accommodating member44and is mounted on the hood29.

In the present embodiment, the accommodating member44is in a triangular shape that is inclined rearward when viewed from the side. An inclined rear surface (oblique side surface) of the accommodating member44corresponds to the upper surface (the surface facing rearward (the obverse side)) of the condenser D1. The accommodating member44may be made of a resin or the like or may be made of a sheet metal.

As illustrated inFIG.12and the like, the accommodating member44has a top wall44a, a left side wall44b, a right side wall44c, and an inclined wall44d. The top wall44adefines an upper portion of the accommodating member44. The left side wall44bdefines a left side portion of the accommodating member44. The right side wall44cdefines a right side portion of the accommodating member44. The inclined wall44ddefines a rear inclined portion of the accommodating member44. The top wall44a, the left side wall44b, the right side wall44c, and the inclined wall44ddefine a space in which the condenser D1the receiver R1, and so forth are accommodated.

The inclined wall44dis an inclined portion that corresponds to the upper surface of the condenser D1. The inclined wall44dhas a third opening47that corresponds to the upper surface of the condenser D1.

As illustrated inFIG.12and the like, the accommodating member44includes a receiver accommodating portion44e. The receiver accommodating portion44eis a cylindrical space larger than the receiver R1, and in the present embodiment, the receiver accommodating portion44eis positioned on the right side of the inclined wall44d(third opening47).

As illustrated inFIG.10Bthe accommodating member44is attached to the bracket34. The top wall44ais provided with third attachment portions44a1. The third attachment portions44a1are portions (holes) for attachment of the accommodating member44to the first lateral portion35d. More specifically, the accommodating member44is attached to the first lateral portion35dby second attachment portions35d1which are provided at the first lateral portion35d, the third attachment portions44a1, and the bolts B1. The second attachment portions35d1are holes that are spaced apart from each other in the machine-body width direction and extend through the first lateral portion35din the vertical direction. The top wall44ais attached to the first lateral portion35dby inserting the bolts B1into the third attachment portions44a1and the second attachment portions35d1.

The left side wall44bis provided with a fourth attachment portion44b1. The right side wall44cis provided with a fifth attachment portion44c1. The fourth attachment portion44b1and the fifth attachment portion44c1are portions (holes) for attachment of the accommodating member44to the support plate35b. More specifically, the accommodating member44is attached to the support plate35bby first attachment portions35b4which are formed on the support plate35b, the fourth attachment portion44b1, the fifth attachment portion44c1, and the bolts B1. The first attachment portions35b4are each formed on a front portion of the support plate35b. More specifically, the first attachment portions35b4are provided on the front side of the ends (the left end and the right end) of the support plate35bin the machine-body width direction. The first attachment portions35b4are obtained by bending the end portions of the support plate35bin the machine-body width direction. The left side wall44band the right side wall44care attached to the support plate35bby inserting one of the bolts B1into one of the first attachment portions35b4and the fourth attachment portion44b1and inserting another one of the bolts B1into the other first attachment portion35b4and the fifth attachment portion44c1.

As illustrated inFIGS.10A to12and the like, the accommodating member44has an opening45a(first air inlet46a), the opening45b(second air inlet46b), and the opening47(air outlet48). The opening45a(the first air inlet46a) allows communication between the inside and the outside of the accommodating member44. More specifically, the accommodating member44has the air inlets46and the air outlet48. The air inlets46are provided in the left and right side surfaces of the accommodating member44, and the air to cool the condenser D1is drawn in by the electric fan F1through the air inlets46. The air outlet48is provided in the rear surface of the accommodating member44that is inclined downward in the rearward direction. The air that has been blown out from the electric fan F1and that has been used to cool the condenser D1is discharged through the air outlet48diagonally upward and rearward. The rear surface of the accommodating member44that has the air outlet48is inclined downward in the rearward direction, and the condenser D1is inclined downward in the rearward direction, so that the condenser D1faces the air outlet48. The electric fan F1is provided at the front side of the condenser D1and is configured to blow the air diagonally upward and rearward toward the condenser D1.

The air inlets46aand46bare openings through which the electric fan F1draws in the cooling air from the machine-body width direction and are provided on the sides of the accommodating member44.

More specifically, the left side wall44bof the accommodating member44has the first opening45afacing leftward. The first opening45ais the first air inlet46a. The first air inlet46ais n a substantially triangular shape and provided such that its oblique side extends along the inclined wall44d. The right side wall44cof the accommodating member44has the second opening45bfacing rightward. The second opening45bis the second air inlet46b. The second air inlet46bis in a substantially triangular shape and provided such that its oblique side extends along the inclined wall44d.

The second air inlet46bincludes a projecting upper portion. The second air inlet46bextends over the receiver accommodating portion44e. In other words, the air inlets46aand46bto take in cooling air CA from the outside are provided on the left and right sides of the condenser D1. A dustproof mesh member49is attached to each of the air inlets46aand46b.

More specifically, as illustrated inFIG.10B, each of the air inlets46aand46bis shaped to substantially match the external shape of the bracket34. More specifically, the inclinations of the oblique sides of the left and right air inlets46aand46bmatch the inclinations of the first vertical portion35hand the second vertical portion35i. The air inlets46aand46beach of which has a substantially triangular shape communicate with the space on the rear side of the condenser D1. In other words, the oblique side of the air inlets46is positioned forward and downward of the condenser D1. The cooling air CA flows into the space on the rear side of the condenser D1from the outside through the left and right air inlets46aand46b. The cooling air CA is taken into the accommodating member44by the electric fan F1through the left and right air inlets46aand46band is sent to the condenser D1as the cooling air CA.

The positional relationship between the receiver R1and the right second air inlet46bwill now be described. The receiver R1is provided on the right side of the condenser D1and positioned behind the cabins5with a space therebetween. Thus, the receiver R1is positioned close to the rear end of the second air inlet46b. In other words, the receiver R1is positioned close to a portion of the second air inlet46bthat is short in the vertical direction, and thus, the receiver R1does not block the opening of the second air inlet46b. Note that the shape and the area of each of the left and right air inlets46aand46bare not limited to those mentioned as examples. For example, the left and right air inlets46aand46bmay each have a quadrangular shape. In addition, the area of each of the left and right air inlets46aand46bmay be set by taking the cooling capacity of the condenser D1into consideration.

The inclined wall44dhas the rear third opening47facing diagonally upward and rearward. The rear third opening47is the air outlet48. The air outlet48is an opening for discharging an air HA that has cooled the condenser D1. The air outlet48extends from the upper end to the lower end of the inclined wall44d. The air outlet48is provided so as to correspond to the upper surface of the condenser D1.

More specifically, the inclined rear surface of the accommodating member44has the rear third opening47facing rearward. The rear third opening47is the air outlet48for discharging the air HA that has undergone heat exchange in the condenser D1. In other words, the air outlet48through which the air HA that has undergone heat exchange in the condenser D1is discharged is provided behind the condenser D1so as to face obliquely upward. The air outlet48is provided so as to face the upper surface of the condenser D1. Another dustproof mesh member49is attached to the air outlet48.

The air HA that has been sent to the condenser D1by the electric fan F1, that has passed through the condenser D1, and that has undergone heat exchange is discharged rearward and obliquely upward from the air outlet48.

As illustrated inFIGS.10A and10Band the like, the AC hose40is provided with the sight glass R2to check the state of the air-conditioning gas. As illustrated inFIGS.10A and10Band the like, when viewed from the side, the sight glass R2is provided such that it is seen through a protruding portion46b1of the right second air inlet46b.

Note that, in the present embodiment, although the sight glass R2is provided such that it is seen through the right second opening45b(second air inlet46b), the position of the sight glass R2is not limited to the position that has mentioned above as an example as long as the sight glass R2can be checked from the outside. For example, the receiver R1may be provided on the left side of the condenser D1, and the sight glass R2may be provided such that it is seen through the left first air inlet46a.

As has been described, a working machine1according to one or more embodiments includes a machine body4, a cabin5which is provided on the machine body4and in which an operator's seat27where an operator O sits is provided, a hood29provided behind the cabin5, and a condenser D1for an air conditioner to adjust a temperature inside the cabin5, wherein the condenser D1is provided above the hood29such that the condenser D1faces a lower portion of a rear surface of a rear panel23of the cabin5.

With the above-described configuration, since the condenser D1of the air conditioner is located outside the engine compartment21and the cabin5, it is possible to prevent or reduce the thermal effect of the condenser D1of the air conditioner on the working machine1without deteriorating the comfort of the cabin5. Furthermore, compared with the case where the condenser D1is provided in the engine compartment21, it is possible to improve the maintainability of the condenser D1and elements provided in the engine compartment21.

The condenser D1(or an accommodating member44housing the condenser D1) may be positioned such that an upper surface (rear surface) thereof is inclined downward in a rearward direction.

With this, compared with the case where the condenser D1is vertically installed, the installation space of the condenser D1in the vertical direction can be reduced. For example, a rear window23aof the rear panel23may be a window made of a see-through material, and an upper end of the condenser D1may be lower than a midpoint between upper and lower ends of the rear window23aand lower than an upper end of a backrest portion of the operator's seat27. With this, compared with the case where the condenser D1is vertically installed, it is possible to prevent or reduce a decrease in the field of rear view of the operator O in the operator's seat27through the rear window23a. In the case where the rear window23aof the cabin5functions as an emergency exit37, it is possible to ensure an area that enables the operator O to escape through the emergency exit37even with the condenser D1kept installed. Furthermore, since exhaust heat from the condenser D1can be discharged diagonally rearward and upward, the air discharged from the condenser D1can be prevented from directly hitting workers who are working in the vicinity of the backhoe1, pedestrians, and others. Furthermore, it is possible to reduce propagation of noise generated by the electric fan F1and the like rearward from the working machine1.

Compared with the case where the condenser D1is horizontally installed, the installation space of the condenser D1in the front-rear direction can be reduced. With this, the condenser D1may be positioned inward of an outer edge of the machine body4(for example, an outer edge of a weight8) in plan view, and may be included within the turning radius of the working machine1.

In the present embodiment, the rear edge of the machine body4(weight8) is in the form of an arc centered on a turning axis X1, and the condenser D1is provided equally on left and right sides of a centerline in the machine-body width direction in plan view, the centerline Y1passing through the turning axis X1of the working machine1and extending in the front-rear direction in plan view. With this, in plan view, the condenser D1can be positioned inward of the outer edge of the machine body4(e.g., outer edge of the weight8) and can be appropriately positioned within the turning radius of the working machine1.

The position of a right side wall44cof the accommodating member44(condenser D1) and the position of a right side wall (side panel25) of the cabin5may be substantially the same in the machine-body width direction. This makes it possible to ensure the field of rear view of the operator O using a right side mirror5aprovided at the cabin5.

The working machine1may further include a support frame30in the hood29to support the hood29, a bracket34to support the condenser D1, and a bracket support member (boss member33) fixed to the support frame30and extending through the hood29to support the bracket34above the hood29.

With the above-described configuration, the condenser D1can be appropriately supported above the hood29.

The hood29may have a hole portion39to allow at least one air-conditioning (AC) hose40to be guided therethrough, the at least one air-conditioning hose being at least one hose to allow a refrigerant for the air conditioner to flow therethrough. With this, the AC hose(s)40can be appropriately guided between the inside of the engine compartment21and the outside of the engine compartment21.

The working machine1may further include an electric fan F1to cool the condenser D1, the fan F1being provided on or above the hood29such that the fan F1faces the condenser D1. This makes it possible to efficiently cool the condenser D1.

The working machine1may further include an electric fan F1to cool the condenser D1the fan F1being provided on or above the hood29such that the fan F1faces the condenser D1, and the bracket34supports the condenser D1and the fan F1. With this, the condenser D1and the electric fan F1can be appropriately supported above the hood29.

The hood may have a hole portion39to allow at least one air-conditioning (AC) hose and at least one harness41to be guided therethrough, the at least one air-conditioning hose40being at least one hose to allow a refrigerant for the air conditioner to flow therethrough, the at least one harness41being connected to the electric fan F1. With this, the AC hose40and the harness41can be appropriately guided between the inside of the engine compartment21and the outside of the engine compartment21.

A working machine1includes a machine body4, a cabin5which is provided on the machine body4and in which an operator's seat27where an operator O sits is provided, a hood29provided behind the cabin5, a condenser D1for an air conditioner to adjust a temperature inside the cabin5, a fan (electric fan F1) to generate an airflow to cool the condenser D1, and an accommodating member44to contain the condenser D1and the fan (electric fan F1), wherein the accommodating member44has air inlets46which allow air for cooling the condenser D1to enter the accommodating member44, the air inlets46being provided in left and right side surfaces of the accommodating member44, and an air outlet48which allows air that has been used to cool the condenser D1to be discharged diagonally upward and rearward, the air outlet48being provided in a rear surface of the accommodating member44, the rear surface being inclined downward in a rearward direction. With this, exhaust heat from the condenser D1can be discharged diagonally rearward and upward.

The rear surface of the accommodating member44that has the air outlet48may be inclined downward in the rearward direction. The condenser D1may be inclined downward in the rearward direction and faces the air outlet48. The fan (electric fan F1) may be provided at a front side of the condenser D1and is configured to blow air diagonally upward and rearward toward the condenser D1. With this, the air discharged from the condenser D1can be prevented from directly hitting workers who are working in the vicinity of the backhoe1, pedestrians, and others.

The working machine1may further include a sight glass R2used to check a state of an air-conditioning gas, the sight glass R2being positioned such that the sight glass R2is seen from an outside of the accommodating member44through at least one of the air inlets46.

With the above-described configuration, the working machine1makes it possible to easily check the state of the sight glass R2.

The working machine1may further include a support frame30in the hood29to support the hood29, and a bracket34to support the condenser D1and the fan (electric fan F1) above the hood29. The support frame30may include a bracket support member (boss member33) provided at an upper portion of the support frame30and extending through the hood29to support the bracket34above the hood29. With this, the condenser D1can be appropriately supported above the hood29.

A receiver R1to store a refrigerant for the air conditioner may be provided on one side of the condenser D1in the accommodating member44. This achieves a compact layout.

A working machine1includes a machine body4, a cabin5which is provided on the machine body4and in which an operator's seat27where an operator O sits is provided, a condenser D1for an air conditioner to adjust a temperature inside the cabin5, a support frame30in a hood29behind the cabin5to support the hood29, a bracket34to support the condenser D1above the hood29, and a bracket support member (boss member33) fixed to the support frame30and extending through the hood29to support the bracket34above the hood29. With this, since the condenser D1is provided outside the engine compartment21and the cabin5, it is possible to prevent or reduce a thermal effect of the condenser D1on the working machine1without deteriorating the comfort of the cabin5. Furthermore, compared with the case where the condenser D1is provided in the engine compartment21, it is possible to improve the maintainability of the condenser D1and elements provided in the engine compartment21.

The hood29may have a hole portion38to allow the bracket support member (boss member33) to extend therethrough. With this, it is possible to arrange the upper surface of the hood29and the upper surface of the bracket support member (boss member33) such that they are substantially flush with each other.

The working machine1may further include a fan (electric fan F1) to cool the condenser D1. The bracket34may support the electric fan F1. With this, the condenser D1and the electric fan F1can be appropriately supported above the hood29.

The working machine1may further include a receiver R1to store a refrigerant for the air conditioner. The bracket34may support the receiver R1. With this, the receiver R1can be appropriately supported above the hood29.

The bracket support member may be a boss member33fixed to an upper surface of the support frame30. With this, the bracket34can be appropriately supported above the hood29.

While example embodiments of the present invention have been described above, it is to be understood that variations and modifications will be apparent to those skilled in the art without departing from the scope and spirit of the present invention. The scope of the present invention, therefore, is to be determined solely by the following claims. Although the present invention has been described by taking a backhoe1as an example, the present invention is not limited to the backhoe1and is also applicable to other construction machines, agricultural machines, and the like.