Work vehicle

A work vehicle includes a vehicle body frame, a cab frame attached to the vehicle body frame so as to be rotatable around a pivot axis, a support provided on the cab frame, a fastener provided on the cab frame and between the support and the pivot axis in a radial direction from the pivot axis, a hydraulic hose, and a hose installation member. The hose installation member includes an engaging portion connected to the fastener, an extending portion configured to be supported on the support, a beam portion connecting the engaging portion and the extending portion, and a first hose holding member provided on the beam portion and having a first opening through which the hydraulic hose passes.

CROSS-REFERENCE TO RELATED APPLICATIONS

The present application claims priority under 35 U.S.C. § 119 to Japanese Patent Application No. 2020-131698, filed Aug. 3, 2020. The contents of this application are incorporated herein by reference in their entirety.

BACKGROUND

Field of the Invention

The present invention relates to a work vehicle.

Discussion of the Background

JP Patent No. 5314177 shows a structure in which a pilot hose for connecting an operation lever in a cabin and a hydraulic actuator is connected via a relay member in a work vehicle in which the cabin is freely opened and closed.

SUMMARY OF THE INVENTION

According to one aspect of the present disclosure, a work vehicle includes a vehicle body frame, a cab frame attached to the vehicle body frame so as to be rotatable around a pivot axis, a support provided on the cab frame, a fastener provided on the cab frame and between the support and the pivot axis in a radial direction from the pivot axis, a hydraulic hose, and a hose installation member. The hose installation member includes an engaging portion connected to the fastener, an extending portion configured to be supported on the support, a beam portion connecting the engaging portion and the extending portion, and a first hose holding member provided on the beam portion and having a first opening through which the hydraulic hose passes.

DESCRIPTION OF THE EMBODIMENTS

Hereinafter, the present invention will be specifically described with reference to the drawings showing embodiments thereof. In the drawings, like reference numerals denote corresponding or substantially identical configurations.

Embodiment

Referring toFIGS.1and2, a work vehicle1, such as a compact track loader, includes a vehicle body frame2, a traveling device3, a working device4, and a cabin5. The vehicle body frame2supports the traveling device3, the working device4, and the cabin5. In the illustrated embodiment, the traveling device3is a crawler type traveling device. Therefore, the traveling device3includes a drive wheel31, driven wheels32and33, and a roller34. However, the traveling device3is not limited to a crawler type traveling device. The traveling device3may be, for example, a front-wheel/rear-wheel traveling device or a traveling device having a front wheel and a rear crawler. The working device4includes a work implement (bucket)41at the distal end of the working device4. The base end of the working device4is attached to the rear part of the vehicle body frame2. The working device4includes a pair of arm mechanisms42for rotatably supporting the bucket41through a bucket pivot shaft43. Each of the pair of arm mechanisms42includes a link44and an arm45.

The link44is rotatable about the fulcrum shaft46relative to the vehicle body frame2. The arm45is rotatable about the joint shaft47relative to the link44. The working device4further includes a plurality of arm cylinders48and at least one equipment cylinder49. Each of the plurality of arm cylinders48is rotatably connected to the vehicle body frame2and the arm45, and moves the link44and the arm45to raise and lower the bucket41. At least one equipment cylinder49is configured to tilt the bucket41. The cabin5is attached to the front part of the vehicle body frame2. A work vehicle1is provided with a front window51and an exterior cover52on the front and side of a cabin5, respectively, and the cabin5is defined by a cab frame53. A work vehicle1includes a driver's seat54and an operation lever55in the cabin5. As shown inFIG.2, the cab frame53is rotatable about the rotational shafts RSL and RSR on the vehicle body frame2.FIGS.1and2illustrate a common pivot axis AXCdefined by the rotational shafts RSL and RSR. That is, the cab frame53is attached to the vehicle body frame2so as to be rotatable about the pivot axis AXC.

In the embodiment according to the present application, the front-rear direction DFB(forward DF/backward DB) means the front-rear direction (forward/backward) as viewed from an operator sitting on the driver's seat54of the cabin5. The leftward direction DL, the rightward direction DR, and the width direction DWmean the leftward direction, the rightward direction, and the leftward and rightward direction, respectively, as viewed from the operator. The upward direction DU, the downward direction DD, and the height direction DHmean the upward direction, the downward direction, and the height direction when viewed from the operator. The front-rear/left-right (width)/up-down (height) directions of the work vehicle1correspond to the front-rear/left-right (width)/up-down (height) directions viewed from the operator.

FIG.1shows the right side of the work vehicle1. As shown inFIG.2, the vehicle body frame2is generally symmetrical with respect to the vehicle body center plane M, and of the pair of arm mechanisms42, the arm mechanism42provided on the right side with respect to the vehicle body center plane M is shown as a first arm mechanism42R, and the arm mechanism42provided on the left side with respect to the vehicle body center plane M is shown as a second arm mechanism42L. A link44provided on the right side of the vehicle body center plane M is shown as a first link44R. An arm45provided on the right side of the vehicle body center plane M is shown as a first arm45R, and an arm45provided on the left side of the vehicle body center plane M is shown as a second atm45L. A fulcrum shaft46provided on the right side with respect to the vehicle body center plane M is shown as a first fulcrum shaft46R, and a fulcrum shaft46provided on the left side with respect to the vehicle body center plane M is shown as a second fulcrum shaft46L. A joint shaft47provided on the right side of the vehicle body center plane M is shown as a first joint shaft47R, and a joint shaft47provided on the left side of the vehicle body center plane M is shown as a second joint shaft47L.

Referring toFIGS.1and2, the work vehicle1further includes an engine6provided at the rear of the vehicle body frame2and a hydraulic pump7. The engine6drives the hydraulic pump7. The hydraulic pump7is configured to discharge hydraulic oil for driving a hydraulic actuator (a plurality of arm cylinders48, at least one equipment cylinder49, a hydraulic motor for driving drive wheels31, and the like) connected to the traveling device3and the working device4. The engine6is provided between the pair of arm mechanisms42in the width direction DWof the work vehicle1. The work vehicle1further includes a cover8for covering the engine6. The work vehicle1further includes a bonnet cover9provided at the rear end of the vehicle body frame2. The bonnet cover9can be opened and closed, and a maintenance worker can perform maintenance work of the engine6or the like.

FIG.3is a side view when the exterior cover52of the cabin5of the work vehicle1is removed inFIG.1. InFIG.3, in addition to the exterior cover52, the pair of arm mechanisms42and a part of the vehicle body frame2are not shown. Referring toFIG.3, the work vehicle1includes a hydraulic control valve71operated by an operation lever55and a plurality of hydraulic hoses72connected to the hydraulic control valve71. The plurality of hydraulic hoses72include a first hydraulic hose73connecting the hydraulic pump7and the hydraulic control valve71, and a second hydraulic hose74connecting a hydraulic actuator (a plurality of arm cylinders48, at least one equipment cylinder49, a hydraulic pump for driving drive wheels31, and the like) and the hydraulic control valve71. Specifically, the hydraulic actuator includes a plurality of arm cylinders48and at least one equipment cylinder49. In the following embodiments, one of the plurality of hydraulic hoses72may be a hydraulic hose72aand the rest may be a plurality of additional hydraulic hoses72b.

The work vehicle1further includes a hose installation member10for installing a plurality of hydraulic hoses72.FIG.4is an enlarged perspective view of the vicinity of the hose installation member10.FIG.5is a view in which a plurality of hydraulic hoses72are removed inFIG.4.FIG.6is a view in which the hose installation member10is removed inFIG.5. Referring toFIGS.3and6, the work vehicle1includes a support56and a fastener57provided on cab frame53. The support56is a U-shaped hook. The fastener57is provided between the support56and the pivot axis AXCwith respect to a radial direction (e.g., front-rear direction DFB) about the pivot axis AXC. The support56and the fastener57are welded to the cab frame53.

FIG.7is an enlarged perspective view of the hose installation member10.FIG.8is a side view of the hose installation member10.FIG.9is a top view of the hose installation member10. Referring toFIGS.3-5and7-9, the hose installation member10includes an engaging portion11, an extending portion12, an additional extending portion13, a beam portion14, a first additional beam portion15, a first hose holding member16, a second hose holding member18, and a second additional beam portion20. The engaging portion11is attachable to and detachable from the fastener57. The engaging portion11is formed of an L-shaped plate-like member. The engaging portion11has a through hole11H through which a bolt (not shown) passes.

As shown inFIGS.4to6, the fastener57has a bolt hole57H for bolting the engaging portion11. A bolt inserted into the bolt hole57H is not shown. As shown inFIGS.4and5, when the engaging portion11is attached to the fastener57, the through hole11H is positioned coaxially with the bolt hole57H. The fastener57further has a stay57S for hooking the engaging portion11. When the engaging portion11is attached to the fastener57, the engaging portion11can be fastened to the fastener57by hooking the engaging portion11to the stay57S and screwing a bolt into the bolt hole57H. Since the engaging portion11is fastened to the fastener57with the bolt, the hose installation member10is prevented from coming off from the support56and the fastener57by the vibration of the work vehicle1.

As shown inFIG.5, the extending portion12is configured to be hooked to the support56. Specifically, the extending portion12is inserted into the opening of the U-shaped hook of the support56. Similarly, the additional extending portion13is configured to be hooked to the support56. Specifically, the additional extending portion13is inserted into the opening of the U-shaped hook of the support56. The extending portion12and the additional extending portion13are made of a bar. The beam portion14connects the engaging portion11and the extending portion12. The beam portion14is also formed of a bar. The engaging portion11and the extending portion12are attached to the beam portion14by welding, for example. However, the engaging portion11, the extending portion12, and the beam portion14may be integrally molded by a mold or the like.

As shown inFIGS.5and7-9, the first hose holding member16is provided on the beam portion14. The first additional beam portion15is connected to the first hose holding member16. Specifically, the beam portion14, the first hose holding member16, and the first additional beam portion15are formed by bending one bar. That is, the beam portion14, the first hose holding member16, and the first additional beam portion15are integrally formed. The additional extending portion13is connected to the first additional beam portion15. The second hose holding member18is provided on the beam portion14between the first hose holding member16and the extending portion12. The second hose holding member18is also connected to the first additional beam portion15. Specifically, the extending portion12, the second hose holding member18, and the additional extending portion13are formed by bending one bar. A bar in which the beam portion14and the first additional beam portion15are integrated is connected to the bent bar by welding, for example. However, these two bars may be integrally formed by a mold or the like. The second additional beam portion20connects the first hose holding member16and the second hose holding member18. Specifically, the second additional beam portion20is connected to, for example, the lower end of the first hose holding member16and the lower end of the second hose holding member18by welding. However, the second additional beam portion20and the above-mentioned two bars may be integrally molded by a mold or the like. The second additional beam portion20is made of a plate.

The first hose holding member16and the second hose holding member18are formed of bars bent in a U-shape. As a result, as shown inFIGS.4and7, the first hose holding member16has a first opening17through which a plurality of hydraulic hoses72(hydraulic hose72a, a plurality of additional hydraulic hoses72b) pass. The second hose holding member18has a second opening19through which a plurality of hydraulic hoses72(hydraulic hose72a, a plurality of additional hydraulic hoses72b) pass. The size of the second opening19is equal to or larger than the size of the first opening17. The first hose holding member16is configured to hook a plurality of hydraulic hoses72in a state that the cabin5is rotated by a predetermined angle around a pivot axis AXCand the space below the cabin5is accessible from the outside. Thus, the plurality of hydraulic hoses72are prevented from deviating downward.

As shown inFIGS.3and4, the hydraulic hose72aand the plurality of additional hydraulic hoses72bare arranged in two or more columns and two or more rows. Specifically, the plurality of hydraulic hoses72(hydraulic hose72a, a plurality of additional hydraulic hoses72b) are arranged in three rows and two columns. Therefore, the work vehicle1further includes a first focusing member21and a second focusing member25for bundling the plurality of hydraulic hoses72. The first focusing member21is provided between the hose installation member10and the hydraulic pump7or the hydraulic actuator in the longitudinal direction of the plurality of hydraulic hoses72. Therefore, the hydraulic hose72aand the plurality of additional hydraulic hoses72bare bundled at the side opposite to the second opening19with respect to the first opening17. The second focusing member25is provided between the hose installation member10and the hydraulic control valve71in the longitudinal direction of the plurality of hydraulic hoses72. Therefore, the hydraulic hose72aand the plurality of additional hydraulic hoses72bare bundled on the side opposite to the first opening17with respect to the second opening19.

FIGS.10and11are enlarged perspective views showing a plurality of hydraulic hoses72, a first focusing member21, and a second focusing member25. InFIGS.10and11, the vehicle body frame2, the cab frame53, the hose installation member10, and the like are not shown. Referring toFIGS.11and12, the first focusing member21includes a first column dividing section22, a second column dividing section23, and a gathering section24. The first column dividing section22, the second column dividing section23and the gathering section24are formed by bending one bar. The first column dividing section22and the second column dividing section23divide respective rows of the plurality of hydraulic hoses72. The gathering section24gathers the plurality of hydraulic hoses72in one bundle between the first column dividing section22and the second column dividing section23.

The second focusing member25includes a third column dividing section26, a first guide section27, a second guide section28, and a third guide section29. The third column dividing section26has a first rod member26a, a second rod member26b, and a third rod member26c, and divides the respective columns of the plurality of hydraulic hoses72by holding the hydraulic hoses of one column among the plurality of hydraulic hoses72between the first rod member26aand the second rod member26b, and holding the hydraulic hoses of another column among the plurality of hydraulic hoses72between the first rod member26aand the third rod member26c. The first guide section27has a fourth rod member27aand a fifth rod member27b, and guides the plurality of hydraulic hoses72between the fourth rod member27aand the fifth rod member27b. The second guide section28has a sixth rod member28aand a seventh rod member28b, and guides the plurality of hydraulic hoses72between the sixth rod member28aand the seventh rod member28b. The third guide section29guides the plurality of hydraulic hoses72to the right side of the third guide section29. The third rod member26c, the fourth rod member27a, the sixth rod member28a, and the third guide section29are formed by bending one bar, and the first rod member26a, the second rod member26b, the fifth rod member27b, and the seventh rod member28bare connected to the bent bar by welding.

The plurality of hydraulic hoses72are arranged in two or more columns and two or more rows by the first focusing member21, the second focusing member25, etc., so that the curvature change of the plurality of hydraulic hoses72can be made substantially equal. Therefore, the slack of the plurality of hydraulic hoses72at the time of the rotation of the cabin5can be matched.

Operation and Effect of Embodiments

In the present embodiment, the work vehicle1includes the vehicle body frame2, the cab frame53, the support56, the fastener57, the hose installation member10, and the hydraulic hose72a. The hose installation member10includes the engaging portion11, the extending portion12, the beam portion14, and the first hose holding member16. The first hose holding member16has the first opening17through which the hydraulic hose72apasses. Thus, the hose installation member10to which a plurality of hydraulic hoses72are previously attached can be attached to the cab frame53instead of passing the hydraulic hose72athrough a hose guide attached to the vehicle body frame2or the cab frame53, thereby the installation of the plurality of hydraulic hoses72is facilitated. In particular, the pilot hose which becomes longer due to removal of the relay member can be easily installed.

Variations of the Embodiments

In the embodiment described above, the structure of the extending portion12and the support56may be the same as the structure of the engaging portion11and the fastener57. The configuration of the engaging portion11and the fastener57may be another removable fixing method other than a bolt. Such a fixing method may be, for example, press-fitting. At least one of the additional extending portion13, the first additional beam portion15, the second additional beam portion20, and the stay57S may be omitted. One of the first opening17and the second opening19may be omitted, and the first opening17and the second opening19may be replaced. The member shown as a round bar in the embodiment may be a square bar member. The position of the engaging portion11may be left and right opposite.

As used herein, “comprise” and its derivatives are non-limiting terms that describe the presence of a component and do not exclude the presence of other components that are not described. This also applies to “have”, “include” and their derivatives.

Ordinal numbers such as “first” and “second” are terms used only to identify structures and do not have other meanings (for example, in a particular order). For example, the existence of “first element” does not imply the existence of “second element” and the existence of “second element” does not imply the existence of “first element”.

Terms such as “substantially”, “roughly”, and “about”, which represent degrees, may mean a reasonable amount of deviation such that the final result does not vary significantly unless otherwise explained in the embodiments. All figures described herein may be interpreted to include phrases such as “substantially”, “roughly”, “about”, and the like.

The phrase “at least one of A and B” in this application should be interpreted to include only A, only B, and both A and B.

It will be apparent from the above disclosure that various modifications and modifications of the present invention are possible. Accordingly, the present invention may be practiced in a manner different from the specific disclosure of the present invention without departing from the spirit and spirit of the invention.