JP2005282616A - Vehicle-height adjustment device of hydraulic shock absorber - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To have an adjustment bolt of a hand-operated hydraulic pump operated without inserting hands into a frame of a vehicle in a vehicle-height adjustment device of a hydraulic shock absorber such as a motorcycle integrally having the hand-operated hydraulic pump. <P>SOLUTION: In the vehicle-height adjustment device of the hydraulic shock absorber 10, a circular collar 130 fitted in an adjustment rod 107 is set to move back and forth at an axial direction by moving back and forth the adjustment rod 107. When a tooth portion 133 of the circular collar 130 is moved back and forth to serrated teeth 112 of a sleeve 110, an engaged ratchet portion 122 of a circular locking member 120 on a second slant surface 133A of the tooth portion 133 of the circular collar 130 is alternately engaged with a groove portion 113 and a non-sliding portion 114 of the serrated teeth 112 of the sleeve 110, respectively, and the adjustment rod 107 is set up to switch to a storing or pulling-out state. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  According to the present invention, an adjustment bolt provided rotatably on the inner periphery of an opening of a pump cylinder is advanced and retracted to supply hydraulic oil in the pump cylinder into the hydraulic actuator and pump the hydraulic oil in the hydraulic actuator. The present invention relates to a vehicle height adjusting device for a hydraulic shock absorber such as a motorcycle provided with a manual hydraulic pump that adjusts the vehicle height by returning from a cylinder.

  As a hydraulic shock absorber provided on the rear wheel side of the motorcycle, there is a hydraulic shock absorber provided on or near the center line in the front-rear direction of the vehicle body at the rear part of the pivot portion of the rear wheel side swing arm.

  As described in Patent Document 1, a vehicle height adjusting hydraulic actuator for adjusting the spring load of the suspension spring is provided on the outer periphery of the rear wheel side hydraulic shock absorber, and further, a screw drive is provided on the outer periphery of the hydraulic actuator. There is a type provided with a vehicle height adjusting device in which a manual hydraulic pump of the type is attached integrally along the vehicle width direction of the vehicle body.

A screw-driven manual hydraulic pump supplies hydraulic oil in the pump cylinder to the hydraulic actuator by manually rotating the pump cylinder and an adjusting bolt screwed into the inner periphery of the opening of the pump cylinder. Alternatively, the vehicle height is adjusted by returning the hydraulic oil in the pump cylinder into the hydraulic actuator.
Reality 7-12746 (2 pages, Fig. 1 and Fig. 2)

  Since the rear wheel side hydraulic shock absorber of Patent Document 1 is provided on or near the center line along the longitudinal direction of the vehicle body, in order to manually rotate the adjustment bolt of the manual hydraulic pump, Hands must be inserted into the interior, and workability is poor.

  An object of the present invention is to provide a vehicle height adjustment device for a hydraulic shock absorber, such as a motorcycle, integrally provided with a manual hydraulic pump, without inserting a manual hydraulic pump adjustment bolt into the body frame. It is to make it operable.

  The invention according to claim 1 includes a damper cylinder, a hydraulic shock absorber disposed between the vehicle body side and the wheel side, and a damper cylinder or the piston rod having a piston rod sliding in the damper cylinder. A hydraulic actuator provided in the pump cylinder and an adjustment bolt is rotatably provided on the inner periphery of the opening of the pump cylinder, and the hydraulic oil in the pump cylinder is supplied into the hydraulic actuator by rotating the adjustment bolt. And a manual hydraulic pump that adjusts the vehicle height by returning the hydraulic oil in the pump cylinder from the hydraulic actuator, and the manual hydraulic pump is disposed along the vehicle width direction of the vehicle body. In a vehicle height adjustment device for a hydraulic shock absorber such as a motorcycle integrally attached to the outer periphery of a hydraulic actuator, a storage hole is provided in the axial direction of the adjustment bolt, and the storage This is a vehicle height adjustment device for a hydraulic shock absorber that is provided so that it can be retracted and retracted with an adjustment rod provided at the tip of the operation rod in a state in which a detent means is provided in the hole. A plurality of serrated teeth comprising a first inclined surface and a stopper portion rising along the axial direction are formed on the tip surface on the circumference, and the axial direction from the stopper portion of one of the adjacent teeth And a non-sliding portion that does not form the groove portion from the stopper portion of the other tooth are alternately formed on the circumference, and the cylindrical sleeve is fitted to the inner periphery of the accommodation hole of the adjustment bolt. A ring-shaped engagement is formed on the outer periphery of the annular portion, and a plurality of engaging claw portions that selectively engage with either the groove portion or the non-sliding portion of the sleeve are formed on the outer periphery of the adjustment rod on the tip end side. The stopper is fitted in a rotatable manner with the stopper kept in place. And a guide key portion engaged with the groove portion of the sleeve on the outer periphery of the proximal end side of the adjustment rod, and a first inclination of the sleeve in the circumferential direction of the distal end surface facing the annular locking member. An annular collar formed at the same pitch as the sawtooth teeth is fitted to the tooth portion forming the second inclined surface inclined in the same direction as the surface, and further, the annular collar is inserted through the guide key portion. Then, in the state inserted in the sleeve, the circumferential position of the tip side portion of the second inclined surface of the tooth portion with respect to the guide key portion is positioned in the groove portion of the sawtooth tooth of the sleeve. A ring is formed between the adjusting rod and the adjusting bolt, and a spring that urges the adjusting rod in the pulling direction is interposed between the adjusting rod and the adjusting bolt. When the collar collars are advanced and retracted axially within the sleeve and the annular collar teeth are advanced and retracted relative to the serrated teeth of the sleeve. The engaging claw portions of the annular locking member mounted on the surface are alternately engaged with the groove portions and the non-sliding portions of the saw-toothed teeth of the sleeve, and the adjustment rod is switched to the retracted or retracted state. It is a thing.

  According to a second aspect of the present invention, in the first aspect of the invention, further, a bottomed cylindrical piston for defining an oil chamber in the hydraulic pump cylinder is provided on a tip side of the adjustment bolt, and an inner periphery of the cylindrical portion of the piston is provided. Further, the tip of the adjustment bolt is brought into contact, and a click mechanism is provided between the outer periphery of the tip and the inner periphery of the cylindrical portion of the piston.

(Claim 1)
(a) With the adjustment bolt provided in the axial direction in the adjustment bolt and with the rotation prevention means in the storage hole, the adjustment rod provided with the pressure operation knob at the tip can be retracted and nested. Provided. Accordingly, the adjustment rod can be rotated in the pulled-out state, and the pressurizing operation knob can be operated without putting a hand into the body frame, so that the workability of adjusting the vehicle height can be improved.

  (b) By moving the adjustment rod against the spring reaction force, the adjustment rod is stored in the adjustment bolt, and when the adjustment rod is retracted by the spring reaction force, the adjustment rod is pulled out of the adjustment bolt. can do. Since the spring is extended and the adjusting rod is pulled out, it is easy to operate. Since the adjusting rod pops out, it can be operated while avoiding obstacles such as swing arms even in a narrow operating space at the rear of the vehicle body.

(Claim 2)
(c) Since the click mechanism is provided between the outer periphery of the tip of the adjustment bolt and the inner periphery of the cylindrical portion of the piston, a click feeling can be imparted to the rotation of the adjustment bolt by the pressurizing operation knob.

  1 is a half sectional view showing a hydraulic shock absorber, FIG. 2 is a sectional view showing a piston valve device, FIG. 3 is a sectional view showing a damping force adjusting device, FIG. 4 is a sectional view showing a base valve device, and FIG. FIG. 6 is a cross-sectional view showing the adjustment rod retracting operation state of the manual hydraulic pump, FIG. 7 is a schematic view showing the drawer lock state of the manual hydraulic pump, and FIG. FIG. 9 is a schematic view showing a lock state of the manual hydraulic pump during unlocking, FIG. 9 is a schematic view showing a storage lock state of the manual hydraulic pump, FIG. 10 is a partial sectional view showing an adjusting bolt, and FIG. 11 is a portion showing an adjusting rod. FIG. 12 is a side view showing a sleeve, FIG. 13 is a side view showing an annular locking member, FIG. 14 shows an annular collar, (A) is a side view, and (B) is an end view.

  As shown in FIG. 1, the hydraulic shock absorber 10 has a hollow piston rod 12 inserted into a damper cylinder 11, and a suspension spring 13 is interposed on the outer side of the damper cylinder 11 and the piston rod 12.

  The damper cylinder 11 includes a vehicle body side mounting member 14, and the piston rod 12 includes a wheel side mounting member 15. A vehicle height adjustment jack 16 as an annular hydraulic actuator and a spring receiver 17 are provided on the outer periphery of the damper cylinder 11, and a spring guide 19A and a spring receiver 19B are fixed to the piston rod 12 via a washer 18. The suspension spring 13 is interposed between the spring receiver 17 and the spring receiver 19B, and the spring load is adjusted by adjusting the set length of the suspension spring 13 with the vehicle height adjusting jack 16, and thus the vehicle height can be adjusted. . The elastic force of the suspension spring 13 absorbs the impact force that the vehicle receives from the road surface.

  As shown in FIGS. 1 and 4, the spring receiving adjustment jack 16 is inserted into the sleeve 21 fitted to the outer periphery of the damper cylinder 11 and the sleeve 21 via an O-ring 22. A housing 24 that is supported in the axial direction, and a plunger 25 that is slidable via O-rings 25A and 25B in a jack chamber between the sleeve 21 and the housing 24. The plunger 25 includes a spring receiver 17. It is configured as a unit. At this time, the vehicle height adjusting jack 16 integrally includes a manual hydraulic pump 26 in the housing 24 and pressurizes the oil in the pump chamber 28 by screwing the pressurizing operation knob 27 of the manual hydraulic pump 26. The plunger 25 and the spring receiver 17 in the jack chamber connected to the pump chamber 28 are moved up and down to adjust the set length of the suspension spring 13. The vehicle height adjusting jack 16 is configured such that the sleeve 21 is locked to the stopper ring 21A on the outer periphery of the damper cylinder 11, and the mounting portion 24A provided on the housing 24 is fixed to the damper cylinder 11 with a set screw 24B. It is assembled to the cylinder 11 (FIG. 5).

  The damper cylinder 11 includes a rod guide 31 through which the piston rod 12 passes. As shown in FIGS. 1 and 2, the rod guide 31 is liquid-tightly attached to the damper cylinder 11 via an O-ring 32, and the piston rod 12 is attached to an inner diameter portion including an oil seal 33, a bush 34, and a dust seal 35. It is liquid-tight and slidable. The damper cylinder 11 is provided with a bump stopper cap 36 on the outside of the rod guide 31, and at the time of maximum compression, the bump stopper cap 36 is abutted against a bump rubber 37 provided on the piston rod 12 so that the maximum compression stroke can be regulated. Yes. Further, the damper cylinder 11 includes a washer 38 </ b> A and a rebound rubber 38 inside the rod guide 31.

  The hydraulic shock absorber 10 has a piston valve device (pressure side and extension side damping force generation device) 40. The hydraulic shock absorber 10 suppresses the expansion and contraction vibration of the damper cylinder 11 and the piston rod 12 due to the absorption of the impact force by the suspension spring 13 by the damping force generated by the piston valve device 40.

  As shown in FIGS. 1 and 2, the piston valve device 40 is equipped with a valve stopper 41, a pressure side valve 42, a piston 43, an extension side valve 44, and a valve stopper 45 at the end of the piston rod 12 inserted into the damper cylinder 11. These are fixed with nuts 46.

  The piston 43 is in fluid-tight sliding contact with the inside of the damper cylinder 11 via an O-ring 47A and a piston ring 47B provided on the outer periphery, and the piston-side oil chamber 48A in which the piston rod 12 is not accommodated inside the damper cylinder 11; It is divided into a rod-side oil chamber 48B in which the piston rod 12 is accommodated. The piston 43 includes a disk-like pressure side valve 42 (attenuation valve) and includes a pressure-side oil passage 49 that allows the piston-side oil chamber 48A and the rod-side oil chamber 48B to communicate with each other, and a disk-like extension side valve 44 (attenuation valve). And an extension side oil passage 50 (not shown) that allows the piston side oil chamber 48A and the rod side oil chamber 48B to communicate with each other.

  The piston 43 bypasses the expansion side valve 44 and connects the piston side oil chamber 48A to the expansion side oil passage 50, and an orifice 50A (not shown) that always connects the piston side oil chamber 48A and the rod side oil chamber 48B. Prepare.

  Further, the piston valve device 40 has a damping force adjusting device 51 shown in FIGS.

  The damping force adjusting device 51 forms a bypass oil passage 52 that allows the piston-side oil chamber 48A and the rod-side oil chamber 48B to communicate with each other by a sleeve 51A press-fitted into the piston rod 12, and this bypass oil passage 52 is connected to the piston-side oil chamber 52. A vertical hole 52A that opens to 48A and a horizontal hole 52B that opens to the rod-side oil chamber 48B are configured. The damping force adjusting device 51 is inserted into the hollow portion of the piston rod 12 so that the adjusting rod 53 can be moved forward and backward in the axial direction and liquid-tightly through an O-ring 54, and the bypass oil passage 52 is vertically inserted by a needle valve 53 A at the tip. The opening area of the valve seat 52C formed by the end surface of the sleeve 51A is adjusted at the base end of the hole 52A. At this time, the adjustment rod 53 extends from the piston rod 12 toward the mounting member 15 at the base end portion thereof, and a contact portion 55 is provided on the end surface of the base end portion. And the adjustment rod 53 is made to protrude in the direction which abuts the contact part 55 on the adjuster 61 mentioned later by the thrust force based on the hydraulic pressure of 48 A of piston side oil chambers.

  The adjuster 61 is provided on the mounting member 15 fixed to the outer end portion of the piston rod 12, and is supported by a mounting hole 62 drilled in the vehicle width direction that intersects the axial direction of the adjusting rod 53. 45 is directly abutted on the abutting portion 55, the adjustment rod 53 is moved forward and backward in the axial direction, the opening area of the valve seat 52C of the bypass passage 52 is adjusted by the needle valve 53A of the adjustment rod 53, and the extension side damping force is adjusted. Make it possible. Specifically, the adjuster 61 is pivotally supported by a support hole 62A of the mounting hole 62 in a liquid-tight manner via an O-ring 63, and a screw portion 61A at the tip is screwed into a screw hole 62B of the mounting hole 62, so that an intermediate The tapered cam surface 61B is brought into contact with the contact portion 55 of the adjustment rod 53. As a result, the adjuster 61 is rotated by the operation knob 64 and is screwed to allow the adjustment rod 53 to advance and retreat in the axial direction by the displacement of the cam surface 61B.

  The hydraulic shock absorber 10 has a base valve device (pressure side damping force generator) 70. As shown in FIGS. 1 and 4, the base valve device 70 is provided with a partition member 71 inside the damper cylinder 11, a reservoir chamber 75 that is partitioned from the piston-side oil chamber 48 </ b> A by the partition member 71, and the partition member 71. Is provided with a pressure-side damping force generator (pressure-side valve 79).

  The base valve device 70 is closely fitted to the inner periphery of the damper cylinder 11 via an O-ring 72 provided on the outer periphery of the partition member 71 and is applied from the outside of the damper cylinder 11 toward the outer periphery of the partition member 71. The fixed portion 73 is fixed to the inner periphery of the damper cylinder 11. At this time, the proximal seal portion of a rubber-like bladder (diaphragm) 74 engaged with the outer periphery of the partition wall member 71 is also fitted in close contact with the inner periphery of the damper cylinder 11. The bladder 74 defines a gas chamber 76 with respect to the reservoir chamber 75.

  A hollow rod 77 is inserted into the center hole of the partition member 71. The hollow rod 77 has a valve stopper 78, a disk-like pressure side valve (attenuation valve) 79, a partition member 71, a disk-like expansion side valve (check valve) 80, and a valve spring 81 inserted under one end flange portion 77A. Is fixed with a nut 82. The partition wall member 71 is provided with a pressure side valve 79 so that the piston side oil chamber 48A and the reservoir chamber 75 can communicate with each other, and the partition side member 71 is provided with an expansion side valve 80 so that the piston side oil chamber 48A can communicate with the reservoir chamber 75. And an extension side oil passage 84 (not shown).

  That is, in the base valve device 70, the control rod 91 attached to the piston rod 12 as will be described later is fitted into the communication passage 90 (described later) of the hollow rod 77 before the hydraulic shock absorber 10. During compression, the oil corresponding to the volume of the piston rod 12 entering the damper cylinder 11 is pushed out from the piston side chamber 48A to the reservoir chamber 75 via the communication passage 90 to compensate, and when the hydraulic shock absorber 10 is extended, it is withdrawn from the damper cylinder 11. The oil corresponding to the withdrawal volume of the piston rod 12 is returned from the reservoir chamber 75 to the piston-side oil chamber 48A via the communication path 90 to compensate. Then, in a stage after the control rod 91 is fitted into the communication path 90, the communication path 90 is blocked by the control rod 91. As a result, when the hydraulic shock absorber 10 is compressed, the piston rod 12 entering the damper cylinder 11 enters. The volume of oil is pushed out of the piston-side oil chamber 48A into the reservoir chamber 75 via the pressure-side oil passage 83 provided with the pressure-side valve 79 to be compensated, and when the hydraulic shock absorber 10 is extended, the piston rod 12 is retracted from the damper cylinder 11. The oil corresponding to the withdrawal volume is returned from the reservoir chamber 75 to the piston-side oil chamber 48A via the extension-side oil passage 84 including the extension-side valve 80 to be compensated.

  However, the hydraulic shock absorber 10 has the following configuration in order to make the pressure side damping force of the pressure side valve 79 of the base valve device 70 position dependent.

  That is, as shown in FIG. 4, the hollow rod 77 of the partition wall member 71 is provided with a communication passage 90 that communicates the piston-side oil chamber 48A and the reservoir chamber 75, and the piston rod 12 is compressed by a fixed stroke and then fitted into the communication passage 90. A control rod 91 is provided on the piston rod 12. At this time, an enlarged diameter portion 91A is formed at the base end portion of the control rod 91, a tapered tapered portion 91B is formed at the distal end portion, and an O-ring 92 fitted in the outer peripheral groove of the enlarged diameter portion 91A is attached to the piston rod 12. While being inserted into the hollow portion, the retaining collar 93 fitted to the stepped portion of the enlarged diameter portion 91A and the tapered portion 91B is inserted into the hollow portion of the piston rod 12, and the tip end portion of the piston rod 12 is swaged to remove it. The retaining collar 93 is retained. Thereby, the control rod 91 is smoothly inserted into the communication path 90 of the hollow rod 77 by attaching the enlarged diameter portion 91A to the piston rod 12 so as to be movable in the radial direction and providing the tapered portion 91B.

  The control rod 91 has a hollow portion 94 that opens to the proximal end side and communicates with the bypass oil passage 52 on the piston rod 12 side, and a hole 95 that communicates with the hollow portion 94 is provided on the outer surface of the control rod 91. The hole 95 is opened to the piston side oil chamber 48A. The bypass oil passage 52 provided in the piston rod 12 communicates with the piston-side oil chamber 48 </ b> A through the hole 95 of the control rod 91.

Therefore, the damping operation of the hydraulic shock absorber 10 is as follows.
(When compressed)
(a) When the moving speed of the piston rod 12 is low, the oil in the piston-side oil chamber 48A moves from the hole 95 of the control rod 91 to the rod-side oil chamber 48B via the bypass oil passage 52 of the piston rod 12, A compression-side damping force is obtained by the throttle resistance of the needle valve 53A. At the same time, the oil in the piston-side oil chamber 48A moves to the rod-side oil chamber 48B through the orifice 50A of the piston 43, and a compression-side damping force is obtained by the squeezing resistance by the orifice 50A during this time.

(b) When the moving speed of the piston rod 12 is medium to high, the control rod 91 is in the small stroke stage where it does not fit into the communication passage 90 of the hollow rod 77.
In addition to this damping force, the oil in the piston-side oil chamber 48A moves to the rod-side oil chamber 48B through the pressure-side oil passage 49 of the piston 43, and a compression-side damping force due to the bending deformation of the pressure-side valve 42 is obtained.

  (c) When the moving speed of the piston rod 12 is medium and high, in the large stroke stage in which the control rod 91 is fitted in the communication path 90 of the hollow rod 77, in addition to the damping force of (a) and (b) above, the piston The oil in the side oil chamber 48 </ b> A moves to the reservoir chamber 75 through the pressure side oil passage 83 of the partition wall member 71, and obtains a pressure side damping force due to the bending deformation of the pressure side valve 79 during this time.

  In the above (a) to (c), the oil corresponding to the volume of entry of the piston rod 12 that has entered the damper cylinder 11 passes from the piston-side oil chamber 48A to the communication passage 90 of the hollow rod 77 or the oil passage of the partition wall member 71. It is pushed through 83 to the reservoir chamber 75 to be compensated.

(When stretched)
(a) When the moving speed of the piston rod 12 is low, the oil in the rod-side oil chamber 48B moves from the bypass oil passage 52 of the piston rod 12 to the piston-side oil chamber 48A via the hole 95 of the control rod 91. The expansion side damping force is obtained by the throttle resistance of the needle valve 53A. At the same time, the oil in the rod side oil chamber 48B moves to the piston side oil chamber 48A through the orifice 50A of the piston 43, and the expansion side damping force is obtained by the squeezing resistance by the orifice 50A.

(b) When the moving speed of the piston rod 12 is medium to high, the above-mentioned (a)
In addition to this damping force, the oil in the rod-side oil chamber 48B moves to the piston-side oil chamber 48A through the extension-side oil passage 50 of the piston 43, and the extension-side damping force due to the bending deformation of the extension-side valve 44 is obtained during this time. .

  In the above-described (a) and (b), the oil corresponding to the retraction volume of the piston rod 12 retreating from the damper cylinder 11 passes from the reservoir chamber 75 to the oil passage 84 (extension side check valve 80) of the partition wall member 71 or hollow. It is returned to the piston side oil chamber 48A through the communication passage 90 of the rod 77 and compensated.

  However, the hydraulic shock absorber 10 is provided on the rear wheel side of the motorcycle, and is provided on or near the center line in the front-rear direction of the vehicle body at the rear part of the pivot portion of the rear wheel side swing arm. At this time, the vehicle height adjustment jack 16 is provided in the damper cylinder 11 of the hydraulic shock absorber 10, and when the manual hydraulic pump 26 is integrally provided in the housing 24 of the vehicle height adjustment jack 16 as described above, the interior of the vehicle body frame is reached. In order to enable the pressure operation knob 27 of the manual hydraulic pump 26 to be screwed without inserting a hand, the manual hydraulic pump 26 has the following configuration.

  As shown in FIG. 5, the manual hydraulic pump 26 is arranged so that the central axis of the pump cylinder 101 is along the vehicle width direction (left-right direction) of the vehicle body with respect to the outer periphery of the housing 24 of the vehicle height adjusting jack 16. The side part of 101 is attached integrally. The pump cylinder 101 has an end member 102 that closes the opening in a fixed manner, and an adjustment bolt 104 is screwed into an internal thread 103 on the inner periphery of the end member 102, and an inner end portion of the adjustment bolt 104 (pump The piston 105 that partitions the pump chamber 28 in a liquid-tight manner is backed up at the hemispherical end face on the chamber 28 side end. By rotating and screwing the adjusting bolt 104 with respect to the pump cylinder 101, the piston 105 is slid along the inner periphery of the pump cylinder 101 and moved forward or backward to operate the pump chamber 28. The oil is supplied to the jack chamber of the vehicle height adjusting jack 16 and the hydraulic oil in the jack chamber of the vehicle height adjusting jack 16 is returned to the pump chamber 28.

  The manual hydraulic pump 26 is provided with a storage hole 104A in the axial direction of the adjusting bolt 104 (FIG. 10), and in the state described in detail after the rotation preventing means 106 (106A, 106B) is provided in the storage hole 104A. An adjusting rod 107 (FIG. 11) provided with a pressurizing operation knob 27 as an operating element is provided in a nested manner (FIG. 6) and can be pulled out (FIG. 5). By pulling out the adjusting rod 107 as shown in FIG. 5, the pressurizing operation knob 27 is moved out of the vehicle body frame, and the adjusting rod 107 and the adjusting bolt 104 can be rotated using the pressurizing operation knob 27.

  The manual hydraulic pump 26 has a cylindrical sleeve 110 (FIG. 12) fixedly fitted to the inner periphery of the accommodation hole 104 </ b> A of the adjustment bolt 104. The male screw portion 111 of the sleeve 110 is screwed into the female screw portion 104B of the storage hole 104A.

  As shown in FIG. 12, the sleeve 110 has a sawtooth tooth 112 formed of a first inclined surface 112 </ b> A and a stopper portion 112 </ b> B rising along the axial direction (having a wall shape in the circumferential direction) on the tip surface. A plurality are formed on the circumference. The sleeve 110 includes a groove 113 extending in the axial direction from the stopper 112B of one tooth 112 of the adjacent teeth 112, 112, and a non-sliding portion 114 that does not form the groove 113 from the stopper 112B of the other tooth 112. The sleeve 110 is alternately formed on the circumference. The sleeve 110 is provided with a total of three groove portions 113 at circumferentially three-divided positions and a total of three non-sliding portions 114 at circumferentially-divided positions of three.

  In the manual hydraulic pump 26, an annular locking member 120 (FIG. 13) is rotatably fitted to the outer periphery of the adjustment rod 107 on the front end side. It is provided in a state of being prevented from being removed by the diameter retaining portion 107A.

  As shown in FIG. 13, the locking member 120 is formed with a plurality of engaging claws 122 that selectively engage with either the groove 113 or the non-sliding portion 114 of the sleeve 110 on the outer periphery of the annular portion 121. To do. The engaging claw portion 122 protrudes in the axial direction from the end surface of the annular portion 121 of the locking member 120 fitted to the adjusting rod 107 on the side opposite to the retaining portion 107A of the adjusting rod 107. The number of the engaging claw portions 122 is the same as the number of the groove portions 113 or the non-sliding portions 114 of the sleeve 110, and is three in this embodiment.

  The manual hydraulic pump 26 is fitted on the outer periphery of the adjusting rod 107 on the proximal end side in a non-rotating state with an annular collar 130 (FIG. 14) via the anti-rotating means 106A and in a freely displaceable axial direction. I wear it. The anti-rotation means 106 </ b> A is configured by engaging a key 131 </ b> A extending in the axial direction of the inner periphery of the collar 130 in a key groove 131 </ b> B provided on the outer periphery of the adjustment rod 107.

  As shown in FIG. 14, the collar 130 is the same as the first inclined surface 112 </ b> A of the sleeve 110 in the circumferential direction of the guide key portion 132 that engages with the groove portion 113 of the sleeve 110 and the distal end surface that faces the locking member 120. The teeth 133 having the second inclined surface 133 </ b> A inclined in the direction are formed at the same pitch as the sawtooth teeth 112 of the sleeve 110. The tooth part 133 includes an inclined surface 133B that intersects with the second inclined surface 133A and forms V-shaped valleys V1 and V2. One guide key portion 132 may be provided. The outer diameter of the annular portion 121 of the locking member 120 and the outer diameter of the collar 130 are the same.

  The manual hydraulic pump 26 inserts the collar 130 into the sleeve 110 with the guide key portion 132 of the collar 130 engaged with the groove 113 of the sleeve 110. At this time, the guide key portion 132 and the groove portion 113 constitute a rotation prevention means 106B that allows relative movement in the axial direction and rotates integrally in the rotation direction, and together with the rotation prevention means 106A, the pressure operation knob 106 27 and anti-rotation means 106 for the adjusting rod 107. The manual hydraulic pump 26 sets the position of the guide key portion 132 and the tooth portion 133 of the collar 130 in the state where the guide key portion 132 of the collar 130 is engaged with the groove portion 113 of the sleeve 110. In the circumferential direction, the circumferential position of the tip side portion (mountain portion) of the second inclined surface 133A of the tooth portion 133 corresponding to the guide key portion 132 (at the same circumferential position) is a sawtooth tooth of the sleeve 110. 112 is formed so as to be positioned in the groove 113 of the 112 (a mountain side portion of the second inclined surface 133A of the tooth 133 is positioned in the groove 113) (FIG. 7). At this time, in the collar 130, with respect to the second inclined surface 133A of the tooth portion 133 described above corresponding to the guide key portion 132, the tip side portion (mountain portion) of the second inclined surface 133A of the adjacent tooth portion 133 is provided. Is located in the non-sliding portion 114 of the serrated tooth 112 of the sleeve 110 (FIG. 9).

  The manual hydraulic pump 26 has a spring 140 interposed between the adjusting rod 107 and the adjusting bolt 104 for biasing the adjusting rod 107 in the pulling direction. The spring 140 is housed in the accommodation hole 104 </ b> A of the adjustment bolt 104 and is seated on the inner surface of the inner end portion of the adjustment bolt 104 and the end surface recess of the retaining portion 107 </ b> A of the adjustment rod 107.

  The manual hydraulic pump 26 moves the collar 130 fitted to the adjustment rod 107 in the sleeve 110 in the axial direction by moving the adjustment rod 107 forward and backward. As a result, when the tooth portion 133 of the collar 130 is advanced and retracted in and out of the axial direction with respect to the serrated tooth 112 of the sleeve 110, the engagement of the locking member 120 mounted on the second inclined surface 133 </ b> A of the tooth portion 133 of the collar 130. The claw portions 122 are alternately engaged with the groove portions 113 and the non-sliding portions 114 of the serrated teeth 112 of the sleeve 110. When the engaging claw 122 of the locking member 120 is engaged with the groove 113 of the sleeve 110, the adjustment rod 107 is placed in the retracted state, and the engaging claw 122 of the locking member 120 is moved to the non-sliding portion 114 of the sleeve 110. When engaged, the adjustment rod 107 is switched to the pulled-out state.

  When the manual hydraulic pump 26 is provided with the bottomed cylindrical piston 105 that defines the pump chamber 28 (oil chamber) of the pump cylinder 101 on the inner end side that is the front end side of the adjustment bolt 104 as described above, The inner end of the bolt 104 is brought into contact with the inner periphery of the cylindrical portion of the piston 105, and the click mechanism 150 is provided between the outer periphery of the inner end of the adjusting bolt 104 and the inner periphery of the cylindrical portion of the piston 105. Is provided.

  The click mechanism 150 inserts a compression spring 152 into a through-hole 151 formed on the diameter of the inner end of the adjustment bolt 104, and loads balls 153 at both ends of the through-hole 151. The ball 153 is urged outward by 152, and the urged ball 153 can be engaged with and disengaged from engagement recesses 154 provided at a plurality of circumferential positions on the inner periphery of the cylindrical portion of the piston 105. In the process of rotating the adjusting bolt 104 by the pressurizing operation knob 27, the ball 153 is engaged with and disengaged from the engaging recess 154, thereby giving a click feeling to the rotating operation. However, the manual hydraulic pump 26 has an O-ring 105 </ b> A fitted in an annular groove provided on the outer periphery of the cylindrical portion of the piston 105, and the O-ring 105 </ b> A in the circumferential direction of the inner periphery of the pump chamber 28 of the pump cylinder 101. Friction is made larger than the engaging force in the rotational operation direction exerted on the engaging recess 154 by the ball 153 biased by the compression spring 152, and the piston 105 is held and prevented from rotating.

  The manual hydraulic pump 26 is composed of a first end member 161 on the inner side in the axial direction of the pump cylinder 101 (on the pump chamber 28 side) and a second end member 162 on the outer side. Both the first end member 161 and the second end member 162 were screwed into the pump cylinder 101. The aforementioned internal thread portion 103 was formed on the first end member 161. The first end member 161 includes an air vent hole 161A penetrating from one end surface in the axial direction (end surface on the pump chamber 28 side) to the other end surface (end surface on the second end member 152 side).

Therefore, the manual hydraulic pump 26 is used as follows.
(1) When the pressurizing operation knob 27 of the manual hydraulic pump 26 is screwed to supply and discharge the oil in the pump chamber 28 to the jack chamber of the vehicle height adjusting jack 16, the pressurizing operation knob 27 and the adjusting rod are used. 107 is pulled out from the accommodation hole 104A of the adjustment bolt 104 as shown in (3) below (FIGS. 5 and 7), and the knob 27 can be rotated without the operator inserting his / her hand into the body frame. To do. The rotational operation force applied to the pressure operation knob 27 is the rotation prevention means 106A (key 131A, key groove 131B) of the adjustment rod 107 and the collar 130, and the rotation prevention means 106B (guide key portion 132, The adjusting bolt 104 integral with the sleeve 110 is screwed through the groove 113), and the piston 105 is moved forward and backward in the pump chamber 28 of the pump cylinder 101, and the oil in the pump chamber 28 is jacked to the vehicle height adjusting jack 16. Discharge into the room.

  (2) When the vehicle height adjustment by the manual hydraulic pump 26 is completed, the pressurizing operation knob 27 and the adjustment rod 107 are stored in the storage hole 104A of the adjustment bolt 104 (FIGS. 6 and 9). That is, when the pressure operating knob 27 and the adjusting rod 107 are pushed against the spring 140 in the axial direction from the pulled-out state of FIGS. 5 and 7, the second inclined surface 133A of the tooth portion 133 of the collar 130 is engaged with the locking member. The engaging claw 122 of 120 is pushed out from the groove 113 of the sleeve 110, and the engaging claw 122 of the pushed locking member 120 is formed on the second inclined surface 133A of the tooth portion 133 of the collar 130 protruding from the sleeve 110. It slides along and falls into the valley V1 of the tooth part 133 (FIG. 8). Subsequently, when the pressurizing operation knob 27 and the adjusting rod 107 are returned by the spring 140, the tooth portion 133 of the collar 130 is submerged in the sleeve 110, and the locking member 120 that has fallen into the valley V1 of the tooth portion 133 is obtained. The engaging claw portion 122 is transferred onto the first inclined surface 112A of the tooth 112 of the sleeve 110, descends to the stopper portion 112B along the first inclined surface 112A, and engages with the non-sliding portion 114. Locked to the stored state (FIGS. 6 and 9).

  (3) When the pressurizing operation knob 27 and the adjusting rod 107 are switched from the retracted state (2) (FIGS. 6 and 9) to the retracted state (1) (FIGS. 5 and 7), as follows. become. That is, when the pressure operating knob 27 and the adjusting rod 107 are pushed against the spring 140 in the axial direction from the stored state of FIGS. 6 and 9, the second inclined surface 133 </ b> A of the tooth portion 133 of the collar 130 is removed from the sleeve 110. The engaging claw 122 of the locking member 120 protrudes and is pushed out from the non-sliding portion 114 of the sleeve 110 (the stopper portion 112B of the serrated tooth 112). It slides along the second inclined surface 133A of the tooth portion 133 of the collar 130 protruding from the sleeve 110, and falls into the valley V2 of the tooth portion 133. Subsequently, when the pressurizing operation knob 27 and the adjustment rod 107 are returned by the spring 140, the tooth portion 133 of the collar 130 is submerged in the sleeve 110, and the locking member 120 that has fallen into the valley V2 of the tooth portion 133 is obtained. The engaging claw portion 122 of the sleeve 110 moves onto the first inclined surface 112A of the serrated tooth 112 of the sleeve 110, descends to the stopper portion 112B along the first inclined surface 112A, and engages with the groove portion 113. The groove 113 is slid. As a result, the guide key portion 132 of the collar 130 abuts on the innermost portion of the groove portion 113 of the sleeve 110, and the engaging claw portion 122 of the locking member 120 contacts the second inclined surface 133 A of the tooth portion 133 of the collar 130. The adjusting rod 107 is set and held at the withdrawal end by the spring 140 (FIGS. 5 and 7).

According to the present embodiment, the following operational effects can be obtained.
(a) The adjusting bolt 104 is provided with an accommodating hole 104A in the axial direction, and the adjusting rod 107 provided with the pressurizing operation knob 27 at the tip is nested in a state where the retaining hole 106 is provided in the accommodating hole 104A. It can be stored and pulled out. Accordingly, the adjusting rod 107 can be rotated in the pulled-out state, and the pressurizing operation knob 27 can be operated without putting a hand into the body frame, so that the workability of adjusting the vehicle height can be improved.

  (b) By moving the adjustment rod 107 against the reaction force of the spring 140, the adjustment rod 107 is stored in the adjustment bolt 104, and when the adjustment rod 107 is retracted by the reaction force of the spring 140, the adjustment rod 107 is moved. The adjustment bolt 104 can be pulled out. Since the spring 140 is extended and the adjusting rod 107 is pulled out in a protruding state, the operability is good. Since the adjusting rod 107 pops out, it can be operated while avoiding obstacles such as a swing arm even in a narrow operating space at the rear of the vehicle body.

  (c) Since the click mechanism 150 is provided between the outer periphery of the tip of the adjustment bolt 104 and the inner periphery of the cylindrical portion of the piston 105, a click feeling is imparted to the rotation of the adjustment bolt 104 by the pressure operation knob 27. Can do.

  The embodiment of the present invention has been described in detail with reference to the drawings. However, the specific configuration of the present invention is not limited to this embodiment, and even if there is a design change or the like without departing from the gist of the present invention. It is included in the present invention. For example, the annular hydraulic actuator (vehicle height adjusting jack 16) and the manual hydraulic pump (26) according to the present invention may be provided on the outer periphery of the piston rod 12 side.

FIG. 1 is a half sectional view showing a hydraulic shock absorber. FIG. 2 is a sectional view showing the piston valve device. FIG. 3 is a cross-sectional view showing the damping force adjusting device. FIG. 4 is a cross-sectional view showing the base valve device. FIG. 5 is a cross-sectional view showing an adjustment rod pull-out operation state of the manual hydraulic pump. FIG. 6 is a cross-sectional view showing an adjusting rod storing operation state of the manual hydraulic pump. FIG. 7 is a schematic diagram showing a drawer lock state of the manual hydraulic pump. FIG. 8 is a schematic diagram showing a state in which the manual hydraulic pump is being unlocked. FIG. 9 is a schematic view showing a storage lock state of the manual hydraulic pump. FIG. 10 is a partial cross-sectional view showing the adjustment bolt. FIG. 11 is a partial sectional view showing the adjusting rod. FIG. 12 is a side view showing the sleeve. FIG. 13 is a side view showing the annular locking member. FIG. 14 shows an annular collar, (A) is a side view, and (B) is an end view.

Explanation of symbols

10 Hydraulic Shock Absorber 11 Damper Cylinder 12 Piston Rod 16 Vehicle Height Adjustment Jack (Hydraulic Actuator)
26 Manual hydraulic pump 27 Pressurizing operation knob (operator)
28 Pump chamber 101 Pump cylinder 102 End member 103 Female thread portion 104 Adjust bolt 104A Storage hole 105 Piston 106 Non-rotating means 107 Adjustment rod 110 Sleeve 112 Serrated tooth 112A First inclined surface 112B Stopper portion 113 Groove portion 114 Non-sliding Part 120 locking member 121 annular part 122 engaging claw part 130 collar 132 guide key part 133 tooth part 133A second inclined surface 140 spring 150 click mechanism part

Claims (2)

A damper cylinder and a hydraulic shock absorber having a piston rod that slides in the damper cylinder and disposed between the vehicle body side and the wheel side;
A hydraulic actuator provided on the damper cylinder or the piston rod;
An adjustment bolt is rotatably provided on the inner periphery of the opening of the pump cylinder. By rotating the adjustment bolt, the hydraulic oil in the pump cylinder is supplied to the hydraulic actuator, and the pump cylinder A manual hydraulic pump that adjusts the vehicle height by returning hydraulic oil from within the hydraulic actuator;
In a vehicle height adjustment device for a hydraulic shock absorber, such as a motorcycle, wherein the manual hydraulic pump is integrally attached to the outer periphery of the hydraulic actuator along the vehicle width direction of the vehicle body,
A hydraulic pressure provided in the axial direction of the adjusting bolt, in which an adjusting rod provided at the tip of the operating element is stored in a nested manner and can be pulled out in a state in which a storing hole is provided in the storing hole. It is a vehicle height adjustment device for the shock absorber,
A plurality of saw-toothed teeth comprising a first inclined surface and a stopper portion rising along the axial direction are formed on the front end surface of the cylindrical sleeve on the circumference, and one tooth of adjacent teeth is formed. A groove portion extending in the axial direction from the stopper portion and a non-sliding portion that does not form the groove portion from the stopper portion of the other tooth are alternately formed on the circumference,
The cylindrical sleeve is fitted to the inner periphery of the adjustment bolt housing hole,
An annular locking member formed on the outer periphery of the annular portion with a plurality of engaging claw portions that selectively engage with either the groove portion or the non-sliding portion of the sleeve on the outer periphery on the distal end side of the adjustment rod. In a state where it is prevented from coming off,
Same as the first inclined surface of the sleeve in the circumferential direction of the guide key portion engaged with the groove portion of the sleeve on the outer periphery on the proximal end side of the adjustment rod and the distal end surface facing the annular locking member. The tooth portion forming the second inclined surface inclined in the direction is fitted with an annular collar formed at the same pitch as the sawtooth teeth,
Further, in the state where the annular collar is inserted into the sleeve via the guide key portion, the circumferential position of the tip side portion of the second inclined surface of the tooth portion with respect to the guide key portion is the sleeve. Formed so that it is located in the groove portion of the serrated tooth of
Between the adjustment rod and the adjustment bolt, a spring for biasing the adjustment rod in the pull-out direction is interposed,
By advancing and retracting the adjusting rod, the annular collar fitted to the adjusting rod is advanced and retracted in the axial direction within the sleeve, and the teeth of the annular collar are moved with respect to the serrated teeth of the sleeve. When the advancing and retreating, the engaging claw portion of the annular locking member that rests on the second inclined surface of the tooth portion of the annular collar is respectively connected to the groove portion and the non-sliding portion of the sawtooth tooth of the sleeve. A vehicle height adjusting device for a hydraulic shock absorber, wherein the adjusting rod is alternately engaged and switched to a retracted or retracted state.   A bottomed cylindrical piston that defines an oil chamber in the hydraulic pump cylinder is provided on the tip side of the adjustment bolt, and the tip of the adjustment bolt is brought into contact with the inner periphery of the cylindrical part of the piston. The vehicle height adjusting device for a hydraulic shock absorber according to claim 1, wherein a click mechanism portion is provided between an outer periphery of the portion and an inner periphery of the cylindrical portion of the piston.

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