Source: https://patents.google.com/patent/KR101133014B1/en
Timestamp: 2020-08-06 22:41:23
Document Index: 741901188

Matched Legal Cases: ['art 11', 'art 3', 'art 11', 'art\n4', 'art 11', 'art 3', 'art 7', 'art 3', 'art 12', 'art 3']

KR101133014B1 - Tension adjusting device for auxiliary machine driving belts - Google Patents
Tension adjusting device for auxiliary machine driving belts Download PDF
KR101133014B1
KR101133014B1 KR1020067009801A KR20067009801A KR101133014B1 KR 101133014 B1 KR101133014 B1 KR 101133014B1 KR 1020067009801 A KR1020067009801 A KR 1020067009801A KR 20067009801 A KR20067009801 A KR 20067009801A KR 101133014 B1 KR101133014 B1 KR 101133014B1
KR1020067009801A
KR20060135634A (en
다다히사 다나카
2003-12-16 Priority to JPJP-P-2003-00418061 priority Critical
2003-12-16 Priority to JP2003418061A priority patent/JP4540974B2/en
2004-12-16 Application filed by 엔티엔 가부시키가이샤 filed Critical 엔티엔 가부시키가이샤
2004-12-16 Priority to PCT/JP2004/018818 priority patent/WO2005059405A1/en
2006-12-29 Publication of KR20060135634A publication Critical patent/KR20060135634A/en
2012-04-04 Publication of KR101133014B1 publication Critical patent/KR101133014B1/en
210000003128 Head Anatomy 0.000 claims 1
It is to provide a tension adjusting device for an auxiliary machine driving belt which can maintain a long term good sealing property of a bearing portion serving as a swing center of a pulley arm supporting a tension pulley. The support shaft 6 is fixed by tightening the bolt 7 embedded in the engine block 8, and the tension pulley is supported by the pulley arm 2 freely swinging about the support shaft 6. Supported to rotate freely, the pulley arm 2 is provided with the adjustment force of a hydraulic auto tensioner, and a tension pulley is pressed against the belt B. As shown in FIG. The washer 10 is coupled between the boss portion 3 provided on the pulley arm 2 and the head portion 7a of the bolt 7, and the end of the boss portion 3 is covered on the outer circumference of the washer 10. The cylindrical part 11 is provided, the slinger 12 is attached to the edge part of the boss part 3, the labyrinth 13 is formed between the slinger 12 and the cylindrical part 11, and the pulley arm 2 ) To prevent intrusion of slurry or dust into the bearing portion which freely swings).
Pulley, arm, slinger, boss, washer, labyrinth, bearing, dust, tension, belt, bolt, auto tensioner
Tension adjuster of belt for auxiliary machine drive {TENSION ADJUSTING DEVICE FOR AUXILIARY MACHINE DRIVING BELTS}
The present invention relates to a belt tensioning device for driving auxiliary machines such as alternators and water pumps.
As a tension adjusting apparatus of the auxiliary machine drive belt, what is described in patent document 1 is known conventionally. Similar to the belt tension adjusting device of the present application shown in FIG. 1, the tension adjusting device contacts the tension pulley 1 on the relaxed side of the auxiliary machine driving belt B, and freely rotates the tension pulley 1. The pulley arm (2), which is securely supported, is swingably attached to the engine block, and the tension pulley (1) is pressed against the belt (B) by applying an adjustment force of the hydraulic auto tensioner (20) to the pulley arm (2). At the same time, the pressure applied to the pulley arm 2 from the belt B via the tension pulley 1 is cushioned by a hydraulic damper built in the hydraulic auto tensioner 20.
Here, in supporting the pulley arm 2, as shown in FIG. 5, a shaft insertion hole 60 is formed on the central axis of the boss portion 3 provided at the end of the pulley arm 2, A pair of cylindrical sliding bearings 61 having flanges 61a at their ends are press-fitted into the shaft insertion holes 60, and the supporting point shaft 62 is inserted into the sliding bearing 61, and the supporting point shaft The small diameter screw shaft 63 provided at the end of 62 is screwed into the screw hole 65 formed in the engine block 64 so as to be tightened.
Furthermore, sealing grooves 66 are provided at both ends of the support shaft 62, and the O-rings 67 mounted on the sealing grooves 66 are elastically connected to the inner circumferences of the pair of sliding bearings 61, respectively. The slurry and the dust are prevented from entering between the contact surface between the sliding bearing 61 and the support shaft 62.
On the other hand, in connecting the pulley arm 2 and the hydraulic auto tensioner 20, conventionally inserted bushes penetrating both sides to the connecting piece 68 provided at one end of the hydraulic auto tensioner 20, as shown in FIG. The hole 69 is formed, the cylindrical sliding bearing 70 is press-fitted into the bush insertion hole 69, the bush 71 is inserted into the sliding bearing 70, and the bush 71 and its The bolts 73 passing through the pair of washers 72 at both ends are screwed into the screw holes 74 provided in the pulley arm 2 so as to be tightened.
In addition, a pair of sealing grooves 75 are formed on the outer periphery of both ends of the bush 71, and the O-rings 76 mounted on the respective sealing grooves 75 are elastically connected to the inner circumferential surface of the sliding bearing 70, thereby sliding. The slurry and dust are prevented from entering between the contact surface of the bearing 70 and the bush 71.
Patent Document 1: Japanese Patent Application Laid-Open No. 10-299846
By the way, in the support structure of the pulley arm 2 and the connection structure of the pulley arm 2 and the hydraulic auto-tensioner 20 in the said conventional belt tensioning apparatus, the belt B is driven by the engine by the motorway. When the vibration vibrates, the pulley arm 2 swings on the highway about the support shaft 62, and the connection between the pulley arm 2 and the hydraulic auto tensioner 20 also rotates relative to the highway. O-rings 67 and 76 are prone to wear due to contact with bearings 61 and 70, and there is a problem in that the sealing property is deteriorated due to the wear and the long-term use is not possible.
In addition, the processing of the sealing grooves 66 and 75 is necessary for attaching the O-rings 67 and 76, and the sealing grooves 66 and 75 for managing the contraction range of the O-rings 67 and 76. There is a problem that the manufacturing cost is expensive because it needs to be precisely finished.
A first object of the present invention is to provide a tension adjusting device for an auxiliary machine driving belt having a low manufacturing cost, which enables to maintain a good long term sealing property of a bearing part freely swinging a pulley arm.
In addition, a second object of the present invention is to provide a tension adjusting device for an auxiliary machine driving belt having a low manufacturing cost, which enables to maintain a good sealing property in a connection portion between a pulley arm and a hydraulic auto tensioner for a long time.
In order to solve the said 1st subject, in 1st invention, a boss part is provided in the edge part of the swingable pulley arm which contacts a tension pulley to the auxiliary machine drive belt, and supports the tension pulley, A cylindrical support point shaft is coupled to the formed shaft insertion hole, the support point shaft penetrates in the axial direction, and the support point shaft is fixed by tightening a bolt screwed to the engine block to freely support the pulley arm, and to the pulley arm. In the tension adjusting device of a belt for auxiliary machine driving in which an adjustment force of a hydraulic auto tensioner is applied to press a tension pulley to a belt, a washer is coupled between the head of the bolt and the end face of the boss, and a boss is formed on the outer circumference of the washer. A cylindrical portion covering an end portion of the portion is provided, and a labyrinth is formed at the end portion of the boss portion with the cylindrical portion. It is adopted attaching the slinger forming configuration.
Moreover, in order to solve the 2nd subject, in 2nd invention, the hydraulic auto which presses a tension pulley to a belt by contacting a tension pulley to an auxiliary machine drive belt, and gives an adjustment force to the swingable pulley arm which supports the tension pulley. A connecting piece is provided at one end of the tensioner, a bush inserting hole penetrating both sides is formed in the connecting piece, a tubular bush is inserted into the bush inserting hole, and the bolt is inserted into the bush and screwed to the pulley arm. A tension adjusting device for an auxiliary machine driving belt in which a bush is fixed by tightening to freely connect one end of a hydraulic auto-tensioner to a pulley arm, wherein the bush and bolt head opposing surfaces are provided between opposing surfaces of the bush and pulley arm. A washer is coupled between them, and a cylindrical portion facing the connecting piece side is provided on the outer periphery of each washer, Across the opening of the insertion hole, the bush deployed to employing a configuration in which installation the annular protrusion to form a labyrinth between said cylindrical portion.
BRIEF DESCRIPTION OF THE DRAWINGS The front view which shows embodiment of the tension adjustment apparatus of the auxiliary machine drive belt which concerns on this invention.
3 is an enlarged cross-sectional view of a portion of FIG. 2;
4 is a cross-sectional view along the IV-IV line of FIG.
5 is a cross-sectional view showing a conventional example of a support structure of a pulley arm.
6 is a cross-sectional view showing a conventional example of a connection structure of a pulley arm and a hydraulic auto tensioner.
B: Belt 1: Tension Pulley
2: pulley arm 3: boss part
4: shaft insertion hole 6: support shaft
7: bolt 7a: head
10: washer 11: cylinder
12: Slinger 13: labyrinth
20: hydraulic auto tensioner 37: connecting piece
43: bush insertion hole 45: bush
46 washer 46a: cylindrical portion
47: Bolt 47a: Head
49: annular projection 50: labyrinth
Embodiments of the present invention will be described below with reference to FIGS. 1 to 4. The tension adjusting device of the auxiliary machine driving belt shown in Fig. 1 is as described above, and Figs. 2 and 3 show a bearing portion for freely swinging the pulley arm 2. As shown, the pulley arm 2 is provided with boss portions 3 protruding on both sides, and the shaft insertion hole 4 formed in the boss portion 3 is formed of a stepped hole, and one end of the inner circumference. The shoulder 4a is provided in this.
A pair of sliding bearings 5 are press-fitted into the shaft insertion hole 4. Each sliding bearing 5 has a cylindrical shape, and a flange 5a is formed at one end thereof, and the flange 5a of one sliding bearing 5 is provided at one end of the inner circumference of the shaft insertion hole 4. In contact with the shoulder 4a, the flange 5a of the other sliding bearing 5 is in contact with the other end surface of the boss 3.
The cylindrical support point shaft 6 is inserted in the pair of sliding bearings 5. The support point shaft 6 is fixed to the engine block 8 by tightening the bolt 7 inserted into the center hole 6a. At this time, the support shaft 6 is fixed to the engine block 8 with a pair of washers 9 and 10 at both ends thereof, and the pulley arm 2 around the support shaft 6. This freedom is to be shaken.
The cylindrical part 11 which covers the other end of the boss part 3 is provided in the outer periphery of the washer 10 provided between the head part 7a of the bolt 7 and the end surface of the support point shaft 6. On the other hand, the slinger 12 is attached to the outer periphery of the other end of the boss part 3. The slinger 12 has the structure which provided the flange 12b in the one end of the cylindrical part 12a press-fitted to the outer periphery of the other end of the boss part 3, The cylindrical part of the slinger 12 and the washer 10 ( The labyrinth 13 is provided between 11).
As described above, the slinger 12 having the flange 12b is attached to the other end of the boss portion 3, and the labyrinth 13 is provided between the slinger 12 and the cylindrical portion 11 of the washer 10. By forming a, the slurry or dust from the outside can be prevented from entering the contact portion of the support shaft 6 and the sliding bearing 5. Moreover, the intrusion into the labyrinth 13 of the slurry which flows down the surface of the pulley arm 2 by the flange 12b provided in the slinger 12 can be prevented.
In addition, since the labyrinth 13 is a non-contact sealing, even if the pulley arm 2 swings on the highway about the support shaft 6, there is no deterioration in function, and the intrusion of slurry and dust can be effectively prevented over a long period of time. In addition, since the sealing structure is simple, manufacturing cost can be reduced.
4 shows a hydraulic auto tensioner 20 for applying an adjustment force to the pulley arm 2. The hydraulic auto tensioner 20 includes a cylinder 21 made of an aluminum alloy filled with hydraulic oil, an oil seal 22 for sealing an upper opening of the cylinder 21 to form an air pool on the oil surface of the hydraulic oil; It absorbs the rod 23 which penetrates the oil seal 22 freely, the return spring 24 which gives the rod 23 a protrusion outward, and the pressing force added to the rod 23. It has a hydraulic damper 25.
The return spring 24 is installed on the outside of the cylinder 21, one end of which is supported by the flange 26 provided on the outer periphery of the lower end of the cylinder 21, and the spring seat 27 attached to the upper end of the rod 23 at the other end. Press to give the rod 23 a protruding outward direction.
The hydraulic damper 25 is fitted inside the cylinder 21 to freely slide the plunger 29 into the bottomed sleeve 28 coupled to the interior of the cylinder 21 to the pressure chamber 30 and the reservoir chamber 31. And a passage 32 for communicating the pressure chamber 30 and the reservoir chamber 31 to the plunger 29, and providing a check valve 33 in the passage 32. The plunger 29 is pressed against the lower end of the rod 23 by the plunger spring 34 coupled in the pressure chamber 30.
Here, the check valve 33 is configured to close the passage 32 when the pressure in the pressure chamber 30 becomes higher than the pressure in the reservoir chamber 31.
In addition, 35 represents the wear ring which supports the intermediate part of the rod 23, and this wear ring 35 moves up and down with the rod 23, and is guided by the inner peripheral surface of the cylinder 21 at the time of the lifting.
In the hydraulic auto tensioner 20 having the above-described configuration, as shown in FIG. 4, the connecting piece 36 provided at the lower end of the cylinder 21 is freely supported by the engine block 8 so as to swing freely on the engine 23. The connecting piece 37 provided on the spring seat 27 is assembled to the pulley arm 2.
In the assembly as described above of the hydraulic auto tensioner 20, when the belt B is loosened, the rod 23 moves outward by pressing the return spring 24, and the rod 23 is pressed. As a result, the pulley arm 2 swings, the tension pulley 1 is pressed against the belt B, and the relaxation of the belt B is absorbed.
When the tension of the belt B is increased, the pressing force is loaded on the rod 23 via the tension pulley 1 and the pulley arm 2, and the pressing force is buffered by the hydraulic damper 25.
When the pressing force is greater than the spring force of the return spring 24, since the pressure in the pressure chamber 30 becomes higher than the pressure in the reservoir chamber 31, the check valve 33 closes the passage 32 and the pressure chamber ( The hydraulic fluid in 30 flows into the reservoir chamber 31 from a minute leakage gap between the plunger 29 and the sliding surface of the bottomed sleeve 28, to a position where the spring force and the pressing force of the return spring 24 are balanced. The rod 23 retreats to keep the tension of the belt B constant.
In connecting the hydraulic auto tensioner 20 with respect to the engine block 8, the through-hole 38 which penetrates both sides is formed in the connection piece 36 provided in the lower end of the cylinder 21, and the through-hole 38 The bush 40 is inserted into the cylindrical sliding bearing 39 press-fitted therein, and a pair of washers 41 are placed on both ends of the bush 40, and the washers 41 and the bush 40 are The bush 40 is fixed to the engine block 8 by screwing and tightening the bolt 42 inserted in the center hole 40a to the engine block 8.
In addition, in connecting the hydraulic auto-tensioner 20 with respect to the pulley arm 2, the bush insertion hole 43 which penetrates both sides to the connecting piece 37 of the spring seat 27 attached to the upper end of the rod 23 is provided. And a cylindrical bush 45 inserted into the cylindrical sliding bearing 44 press-fitted into the bush inserting hole 43, and the bush 45 and a pair of washers 46 facing both ends thereof. The screw 47 penetrates through the screw hole 48 formed in the pulley arm 2, and the head 47a of the bolt 47 and the pulley arm (by tightening the bolt 47). 2) The bush 45 is supported from both ends.
Here, the annular projections 49 are provided in the openings at both ends of the bush insertion hole 43 formed in the connecting piece 37 toward the pair of washers 46, while the annular projections 49 are formed on the outer circumference of the washer 46. A cylindrical portion 46a is formed to cover the gap, and a labyrinth 50 is formed between the cylindrical portion 46a and the annular protrusion 49.
As described above, by covering the annular projection 49 on the outer circumference of the washer 46 and providing the cylindrical portion 46a for forming the labyrinth 50 between the annular projection 49, the slurry from the outside Dust can be prevented from entering between the contact surface of the sliding bearing 44 and the bush 45.
Moreover, since the labyrinth 50 is a non-contact sealing, even if the pulley arm 2 and the connecting piece 37 rotate relatively, there is no deterioration in function, and the intrusion of a slurry and dust can be prevented effectively over a long period of time.
In addition, since the annular projection 49 is provided on the connecting piece 37 and the cylindrical portion 46a is provided on the outer circumference of the washer 46, the manufacturing cost can be reduced.
In addition, you may make it employ | adopt the connection structure of the pulley arm 2 and the connection piece 37 of the upper end of the rod 23 for connection of the connection piece 36 of the lower end of the cylinder 21, and the engine block 8. As shown in FIG.
In the tension adjusting device of the auxiliary machine drive belt according to the first aspect of the present invention, since the bearing portion serving as the swinging center of the pulley arm is prevented from intrusion of slurry or dust by a non-contact sealing structure by labyrinth, there is no functional degradation. In addition to maintaining a good sealing property over a long period of time, the sealing structure is simple, and thus manufacturing cost can be reduced.
In the tension adjusting device of the auxiliary machine driving belt according to the second aspect of the present invention, the rotational connection of the pulley arm and the hydraulic auto tensioner is prevented from intrusion of slurry or dust by a non-contact sealing structure by labyrinth. Similarly to the invention, there is no deterioration in function, the good sealing property can be maintained for a long time, and the sealing structure is simple, so that the manufacturing cost can be reduced.
The tension pulley is brought into contact with the auxiliary machine driving belt, and a boss portion is provided at the end of the swingable pulley arm supporting the tension pulley, and the cylindrical support point shaft is engaged in the shaft insertion hole formed in the boss portion. The support point shaft is fixed by tightening a bolt which is screwed to the engine block to freely support the pulley arm, and the adjustment force of the hydraulic auto tensioner is applied to the pulley arm to press the tension pulley to the belt. In the tension adjusting device of the auxiliary machine drive belt,
A flange which engages the washer between the head of the bolt and the end face of the boss, and has a cylindrical portion covering the end of the boss portion on the outer circumference of the washer, and a flange opposed to the opening end of the cylindrical portion on the outer circumference of the boss portion. And a labyrinth having a cylindrical slinger at its end to form a labyrinth between the slinger and the cylindrical portion of the washer.
KR1020067009801A 2003-12-16 2004-12-16 Tension adjusting device for auxiliary machine driving belts KR101133014B1 (en)
JPJP-P-2003-00418061 2003-12-16
JP2003418061A JP4540974B2 (en) 2003-12-16 2003-12-16 Auxiliary machine belt tension adjuster
PCT/JP2004/018818 WO2005059405A1 (en) 2003-12-16 2004-12-16 Tension adjusting device for auxiliary machine driving belts
KR20060135634A KR20060135634A (en) 2006-12-29
KR101133014B1 true KR101133014B1 (en) 2012-04-04
ID=34697089
KR1020067009801A KR101133014B1 (en) 2003-12-16 2004-12-16 Tension adjusting device for auxiliary machine driving belts
US (1) US7775922B2 (en)
EP (1) EP1703169B1 (en)
JP (1) JP4540974B2 (en)
KR (1) KR101133014B1 (en)
CN (1) CN100441912C (en)
DE (1) DE602004026352D1 (en)
WO (1) WO2005059405A1 (en)
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2004-12-16 CN CNB2004800376334A patent/CN100441912C/en active IP Right Grant
2004-12-16 US US10/582,405 patent/US7775922B2/en active Active
2004-12-16 DE DE602004026352T patent/DE602004026352D1/en active Active
2004-12-16 WO PCT/JP2004/018818 patent/WO2005059405A1/en active Application Filing
2004-12-16 EP EP04807177A patent/EP1703169B1/en active Active
2004-12-16 KR KR1020067009801A patent/KR101133014B1/en active IP Right Grant
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EP1703169A4 (en) 2009-08-12
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