JP2005121060A - Vehicle height adjusting device of hydraulic shock absorber - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To adjust the vehicle height in both upper and lower directions while maintaining stability for setting a suspension spring load without extending and retracting a hydraulic hose installed between a hydraulic pump and a jack oil chamber by the effects of the suspension spring load by a simple structure. <P>SOLUTION: This vehicle height adjusting device 30 of a hydraulic shock absorber 10 is formed such that the vehicle height is adjusted by supplying and discharging a hydraulic oil between the jack oil chamber 34 and the pump oil chamber 43 allowed to communicate with each other through an elastic flexible hydraulic hose 45. An externally operable opening/closing valve 50 is installed between one end of the hydraulic hose 45 and the jack oil chamber 34. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a vehicle height adjusting device for a hydraulic shock absorber.

  In rear-wheel side hydraulic shock absorbers such as motorcycles, the jack oil chamber that adjusts the spring load of the suspension spring attached to the damper body is connected to the hydraulic pump via a flexible hydraulic hose with elasticity such as rubber. The vehicle height adjusting device is configured.

  The vehicle height adjusting device of Patent Document 1 connects a ram operating hydraulic cylinder 4 (jack oil chamber) and a hydraulic source 22 (pump oil chamber) via a hose, and supplies hydraulic pressure from the jack oil chamber to the pump oil chamber. A check valve 17 is interposed in the passage to prevent the flow from the jack oil chamber to the pump oil chamber. Therefore, for the flow from the pump oil chamber to the jack oil chamber, the check valve 17 can automatically lift up from the valve seat and raise the vehicle height, and at the same time, the vehicle mounting load acting on the suspension spring can be reduced. Prevents the hydraulic pressure of the jack oil chamber from being applied to the hose due to fluctuations and vibrations, and avoids setting changes in the suspension spring load due to expansion and contraction of the hose.

However, the check valve 17 hinders the flow from the jack oil chamber to the pump oil chamber and lowers the vehicle height. In order to solve this problem, in Patent Document 1, check release means for releasing the check operation of the check valve 17 on the pump oil chamber side (an operation line 38 made of a flexible metal wire or the like, an action protrusion 32, an operation element 35). ), And when the vehicle height is lowered, the check valve 17 is forcibly lifted up so that the hydraulic oil in the jack oil chamber can be returned to the pump oil chamber. Alternatively, as in Patent Document 2, an oil passage between the jack oil chamber (cylinder chamber 19) and the pump oil chamber (engine main gallery 28) is provided with a check valve 31 that allows a flow when the vehicle height is raised. (High pressure hose 29) and two oil passages (low pressure hose 37) between the jack oil chamber (cylinder chamber 19) and the oil pan 36 with a check valve 44 that allows the flow when the vehicle height is lowered. It is necessary to arrange oil passages in parallel.
62-10513 JP-A 64-36591

  The object of the present invention is to maintain the stable setting of the suspension spring load without causing the hydraulic hose provided between the hydraulic pump and the jack oil chamber to be affected by the suspension spring load and to be contracted by a simple configuration. While making it possible, the vehicle height can be adjusted in both the up and down directions.

  The invention according to claim 1 is a fixed partition member attached to the outer periphery of the damper main body, a sliding oil receiving member that seals a jack oil chamber between the fixed partition member and supports one end of the suspension spring; A flexible hydraulic hose having elasticity with one end fixed to the fixed partition member or the sliding spring receiving member and the other end connected to the hydraulic pump, the jack oil chamber and the hydraulic pump In a vehicle height adjusting device for a hydraulic shock absorber that adjusts the vehicle height by supplying and discharging hydraulic oil to and from the pump oil chamber, an external operation is performed between one end of the hydraulic hose and the jack oil chamber. A possible on-off valve is provided.

  According to a second aspect of the present invention, in the first aspect of the invention, the on-off valve is provided in an oil passage provided in the fixed partition member or the sliding spring receiving member.

  According to a third aspect of the present invention, in the first aspect of the present invention, one end of the hydraulic hose is connected to the fixed partition member or the sliding spring receiving member via a joint member, and is provided in the joint member. The on-off valve is provided in the oil passage.

  According to a fourth aspect of the present invention, in the second or third aspect of the present invention, the on-off valve is provided so as to be rotatable with a direction intersecting the axial direction of the oil passage as a rotation center axis.

  According to a fifth aspect of the present invention, in the second or third aspect of the invention, a valve seat surface is formed in the oil passage, and the on-off valve is provided so as to be able to contact with and separate from the valve seat surface from the axial direction of the oil passage. Is.

(Claim 1)
(a) When the vehicle height is adjusted, the oil passage is opened by the on-off valve, so that the flow of the oil passage between the hydraulic pump and the jack oil chamber is allowed in both directions, and the vehicle height can be adjusted in both the up and down directions. After adjusting the vehicle height, the oil passage is closed by an on-off valve to prevent the hydraulic pressure in the jack oil chamber from being applied to the hydraulic hose due to fluctuations and vibrations in the vehicle's mounting load acting on the suspension spring. The stability of the load setting state of the suspension spring is maintained by eliminating expansion and contraction. This can be realized by a simple configuration in which only a single on-off valve is provided.

  There is no need to provide a special check valve release operation member as in the prior art, or to arrange two oil passages, ie, an oil passage with a check valve for raising the vehicle height and an oil passage with a check valve for lowering the vehicle height in parallel.

(Claim 2)
(b) The number of parts can be reduced by providing the oil passage in which the on-off valve is provided in the fixed partition member or the sliding spring receiving member.

(Claim 3)
(c) By providing the joint member with an oil passage in which the on-off valve is provided, the degree of freedom in design is improved as compared with the case where the oil passage is provided in the fixed partition member or the sliding spring receiving member. When the oil passage and the on-off valve are provided in the fixed partition member or the sliding spring receiving member, the existing fixed partition member or the sliding spring receiving member cannot be diverted, resulting in an increase in cost.

(Claim 4)
(d) The on-off valve can be rotatably provided with the direction intersecting the axial direction of the oil passage as a rotation center axis.

(Claim 5)
(e) The valve seat surface of the oil passage can be formed, and the on-off valve can be provided on and away from the valve seat surface from the axial direction of the oil passage. When the on-off valve is provided on the valve seat surface so as to be freely contactable and disengageable from the axial direction, the on-off valve can be rotated in the direction intersecting the axial direction of the oil passage so that it can be rotated. High sealing performance.

  1 is a cross-sectional view showing the overall structure of a vehicle height adjusting device for a hydraulic shock absorber according to a first embodiment, FIG. 2 is a cross-sectional view of an essential part of FIG. 1, and FIG. 3 shows a vehicle height adjusting device for a hydraulic shock absorber according to a second embodiment. 4 is a cross-sectional view of a main part showing a vehicle height adjusting device for a hydraulic shock absorber according to a third embodiment, FIG. 5 is a cross-sectional view taken along the line V-V of FIG. 4, and FIG. FIG. 7 is a cross-sectional view of an essential part showing a vehicle height adjusting device for a hydraulic shock absorber, and FIG. 7 is a view taken along the line VII-VII in FIG.

Example 1 (FIGS. 1 and 2)
As shown in FIG. 1, the hydraulic shock absorber 10 has a hollow piston rod 12 inserted in a cylinder 11 constituting a damper body. The cylinder 11 includes a vehicle body side mounting member 13, and the piston rod 12 includes an axle side mounting member 14.

  The hydraulic shock absorber 10 has a vehicle height adjusting device 30 described later on the outer periphery of the cylinder 11, and a suspension spring 16 is interposed between a spring receiving member 33 of the vehicle height adjusting device 30 and a spring receiving member 15 provided on the piston rod 12. Is intervening.

  The hydraulic shock absorber 10 inserts a piston rod 12 into a cylinder 11 from a rod guide 21 provided in the cylinder 11, and the piston 11 is provided inside the cylinder 11 by a piston 22 provided at an insertion end of the piston rod 12. Is divided into a rod side oil chamber 23A where the piston rod 12 is not present and a piston side oil chamber 23B where the piston rod 12 is not present, and a damping force generator 24 is provided in the connecting oil passage between the oil chamber 23A provided in the piston 22 and the oil chamber 23B. Yes. In the hydraulic shock absorber 10, an oil chamber 23 </ b> A that bypasses the piston 22 and a bypass oil passage 26 of the oil passage 23 </ b> B are provided in the piston rod 12, and a damping force adjustment rod 25 is provided in the bypass oil passage 26.

  The hydraulic shock absorber 10 communicates a sub tank 27 for compensating the volume of the piston rod 12 entering / exiting the cylinder 11 to the piston side oil chamber 23B, and a damping force generator (not shown) is provided inside the sub tank 27. Provided.

  The hydraulic shock absorber 10 absorbs the impact force received from the road surface when the vehicle travels by the displacement of the suspension spring 16, and absorbs the expansion and contraction vibration of the suspension spring 16 by a damping force generator provided in the piston 22 and the sub tank 27.

However, the hydraulic shock absorber 10 has a vehicle height adjusting device 30 as described below.
As shown in FIGS. 1 and 2, the vehicle height adjusting device 30 screws and inserts a cap member 31 into a cylinder 11 as a damper main body in a liquid-tight manner via an O-ring 31 </ b> A, and the cap member 31 is fixed with a set screw. The cap member 31 is provided with the aforementioned vehicle body side mounting member 13 while being fixed to the cylinder 11 by 31B.

  The vehicle height adjusting device 30 has a substantially cylindrical fixed partition member 32 inserted into the outer periphery of the cylinder 11 and the cap member 31 from the opposite side of the cylinder 11 with respect to the vehicle body side mounting member 13, The circumference is fitted to the outer circumference of the cylinder 11, the inner circumference on the other end side of the fixed partition wall member 32 is fitted to the outer circumference of the cap member 31, and the inner circumferential step portion of the fixed partition wall member 32 is projected to the end surface of the cap member 31. I support it.

  The vehicle height adjusting device 30 has a generally cylindrical sliding spring receiving member 33 inserted into the outer periphery of the fixed partition member 32, and the small diameter inner peripheral portion of the sliding spring receiving member 33 is attached to the small diameter inner peripheral portion. A small-diameter outer peripheral portion of the fixed partition member 32 is fitted in a liquid-tight and slidable manner via the O-ring 33A, and the large-diameter inner peripheral portion of the sliding spring receiving member 33 is connected to the large-diameter outer peripheral portion of the fixed partition member 32. The jack oil chamber 34 is hermetically partitioned between the fixed partition member 32 and the sliding spring receiving member 33 through an O-ring 32A attached to the outer periphery of the large diameter. The slide spring receiving member 33 supports one end of the suspension spring 16 as described above.

  The vehicle height adjusting device 30 includes a hydraulic pump 40. The hydraulic pump 40 is a manual pump (however, an electric pump is also acceptable), a pump oil chamber 43 is defined by a pump housing 41 and a plunger 42, and a plunger 42 is provided at the tip of a handle 44 screwed to the pump housing 41. The hydraulic oil in the pump oil chamber 43 that is expanded and contracted by the plunger 42 that advances and retreats by the rotation operation of the handle 44 is supplied and discharged from the supply / discharge port 43A.

  The vehicle height adjusting device 30 connects the jack oil chamber 34 and the pump oil chamber 43 of the hydraulic pump 40 by a flexible hydraulic hose 45 having elasticity. A hose connector 46 provided at one end of the hydraulic hose 45 is screw-tightly fixed to the T-shaped joint 47 via an O-ring 46A, and the joint 47 is locked by a lock nut 47C via an O-ring 47A and a copper packing 47B. The joint 48 is screwed and fixed in a liquid-tight manner, and the joint 48 is screwed and fixed in a liquid-tight manner to the sliding spring receiving member 33 via an O-ring 48A. The other end of the hydraulic hose 45 is connected to the supply / discharge port 43 </ b> A of the hydraulic pump 40. The vehicle height adjusting device 30 connects the jack oil chamber 34 and the pump oil chamber 43 by an oil passage 100 formed continuously from the hydraulic hose 45, the hose connector 46, the joints 47 and 48, and the sliding spring receiving member 33. The hydraulic oil in the pump oil chamber 43 is supplied to and discharged from the jack oil chamber 34 by operating the hydraulic pump 40.

  When raising the vehicle height by the vehicle height adjusting device 30, the hydraulic oil in the pump oil chamber 43 is supplied to the jack oil chamber 34 to raise the pressure of the jack oil chamber 34, thereby raising the sliding spring receiving member 33, Increase the initial set load. When the vehicle height is lowered, the hydraulic oil in the jack oil chamber 34 is discharged to the pump oil chamber 43 and the jack oil chamber 34 is lowered to lower the sliding spring receiving member 33 to reduce the initial set load of the suspension spring 16. .

  The vehicle height adjusting device 30 is provided with an on-off valve 50 that can be externally operated between one end of the hydraulic hose 45 and the jack oil chamber 34. At this time, the on-off valve 50 is an oil passage 100 (101, 102) provided in the joint 47, and of the oil passages 101, 102 orthogonal to the T type, the oil passage 101 to which the hose connector 46 is screwed and fixed. Is provided in an oil passage 102 orthogonal to.

  Further, the vehicle height adjusting device 30 forms a tapered (conical) valve seat surface 102 </ b> A at the intersection of the oil passage 102 with the oil passage 101 at the joint 47, and the opening / closing valve 50 is connected to the shaft of the oil passage 102. A valve hole 103 provided in a direction (a linear extending direction of the oil passage 102) is provided so as to be able to contact and separate from the valve seat surface 102A. In the on-off valve 50, the large-diameter screw portion 51 is screwed onto the female screw 104 (coaxial with the oil passage 102 and the valve hole 103) of the joint 47, and the tip side needle 52 is liquid-tightly attached to an O-ring 105 provided on the joint 47. The distal end taper surface 52A of the needle 52 is inserted into and detached from the valve seat surface 102A, and the operation groove 53A is provided on the end surface of the proximal end side operation shaft 53.

  When the rotary tool is engaged with the operation groove 53A and the needle 52 is screwed to one end side, the on-off valve 50 abuts the tapered surface 52A of the needle 52 on the valve seat surface 102A of the oil passage 102, and the oil passage 102 ( 100) is closed and screwed in the opposite direction, the tapered surface 52A of the needle 52 is gradually separated from the valve seat surface 102A of the oil passage 102, and the oil passage 102 (100) is opened at an opening according to the distance. Is released.

Therefore, the vehicle height adjusting device 30 has the following effects.
(a) When the vehicle height is adjusted, the oil passage 100 is opened by the on-off valve 50 to permit the flow of the oil passage 100 between the hydraulic pump 40 and the jack oil chamber 34 in both directions, and the vehicle height is adjusted in both the up and down directions. it can. After the vehicle height is adjusted, the oil passage 100 is closed by the on-off valve 50 to prevent the hydraulic pressure in the jack oil chamber 34 from being applied to the hydraulic hose 45 based on fluctuations and vibrations of the vehicle mounting load acting on the suspension spring 16. Then, the expansion and contraction of the hydraulic hose 45 are eliminated and the stability of the load setting state of the suspension spring 16 is maintained. This can be realized by a simple configuration in which only a single on-off valve 50 is provided.

  (b) By providing the joint 47 with the oil passage 100 (102) in which the on-off valve 50 is provided, the degree of freedom in design is improved compared to the case in which the oil passage 100 (102) is provided in the fixed partition member 32 or the sliding spring receiving member 33. When the oil passage 100 (102) and the on-off valve 50 are provided in the fixed partition member 32 or the sliding spring receiving member 33, the existing fixed partition member 32 or the sliding spring receiving member 33 cannot be diverted. Incurs an increase in cost.

  (c) The valve seat surface of the oil passage 100 (102) can be formed, and the on-off valve 50 can be provided in contact with and away from the valve seat surface 102A from the axial direction of the oil passage 100 (102). The on-off valve 50 is provided on the valve seat surface so as to be able to contact and separate from the axial direction, as compared with the case where the on-off valve 50 is provided so as to be rotatable about the direction intersecting the axial direction of the oil passage 100 (102). The sealing performance when the valve 50 is closed is high.

  If the O-ring is fitted to the tapered surface 52A (or valve seat surface 102A) of the needle 52 in the on-off valve 50, the sealing performance in the closed state can be improved.

(Example 2) (FIG. 3)
The vehicle height adjusting device 30 of the second embodiment differs from the first embodiment in that (1) a hose connector 46 provided at one end of the hydraulic hose 45 is directly connected to the sliding spring receiving member 33 via an O-ring 46A in a liquid-tight manner. The jack oil chamber 34 and the pump oil chamber 43 are connected to each other by an oil passage 100 formed continuously to the hydraulic hose 45, the hose connector 46, and the sliding spring receiving member 33, and (2) an on-off valve 50 is an oil passage 100 (111 to 113) provided on the sliding spring receiving member 33 with an on-off valve 60 instead of 50, and the hose connector 46 is screwed and fixed among the oil passages 111 and 112 orthogonal to the T-shape. The oil passage 112 is provided in the oil passage 112 orthogonal to the oil passage 111.

  Here, the vehicle height adjusting device 30 forms a valve seat surface 112A having a tapered surface (conical surface) at the intersection of the oil passage 112 with the oil passage 111 in the sliding spring receiving member 33, and the opening / closing valve 60 is provided. A valve hole 114 provided in an axial direction of the oil passage 112 (a linear extending direction of the oil passage 112) is provided so as to be able to contact and separate from the valve seat surface 112A. In the on-off valve 60, a large-diameter screw portion 61 is screwed onto a female screw 115 (coaxial with the oil passage 112 and the valve hole 114) of the sliding spring receiving member 33, and a tip side needle 62 is provided on the sliding spring receiving member 33. The O-ring 116 is inserted in a liquid-tight manner so that the tip tapered surface 62A of the needle 62 can be brought into and out of contact with the valve seat surface 112A, and the operation groove 63A is provided on the end surface of the proximal-side operation shaft 63.

  When the rotary tool is engaged with the operation groove 63A and the needle 62 is screwed to one end, the on-off valve 60 abuts the tapered surface 62A of the needle 62 on the valve seat surface 112A of the oil passage 112, and the oil passage 112. When (100) is closed and screwed in the opposite direction, the tapered surface 62A of the needle 62 is gradually separated from the valve seat surface 112A of the oil passage 112, and the oil passage 112 (100 ) Is released.

  Therefore, according to the vehicle height adjusting device 30 of the second embodiment, the number of parts can be reduced by providing the oil passage 112 provided with the on-off valve 60 in the sliding spring receiving member 33 as compared with the first embodiment.

Example 3 (FIGS. 4 and 5)
The vehicle height adjusting device 30 of the third embodiment is different from the first embodiment in that (1) the joint 47 between the hose connector 46 and the joint 48 is replaced with the straight joint 120, and the hose connector 46 of the hydraulic hose 45 is replaced with an O-ring. The joint 120 is screwed and fixed to the joint 120 via 46A, and the joint 120 is screwed and fixed to the joint 48 by the lock nut 120C via the O-ring 120A and the copper packing 120B. The chamber 43 is connected to the hydraulic hose 45, the hose connector 46, the joints 120 and 48, and the oil passage 100 formed continuously to the sliding spring receiving member 33, and (2) an on-off valve 70 in place of the on-off valve 50, It is provided in the oil passage 100 (121) provided in the joint 120.

  Here, the vehicle height adjusting device 30 is provided with a valve hole 122 orthogonal to an intermediate portion of the oil passage 121 in the joint 120 in the joint 120, and the on-off valve 70 fitted in the valve hole 122 is jointed in the valve hole 122. A direction orthogonal to the axial direction of 121 is provided so as to be rotatable about a rotation center axis. In the on-off valve 70, the large-diameter screw portion 71 is screwed onto the female screw 123 (coaxial with the valve hole 122) of the joint 120, and the tip side valve stem 72 is liquid-tightly attached to the O-ring 124 provided on the joint 120. An opening 72A that penetrates in the middle direction of the valve rod 72 in the direction perpendicular to the axis is rotatable with respect to the oil passage 121, and an operation groove 73A is provided on the end surface of the proximal-side operation shaft 73.

  When the rotary tool is engaged with the operation groove 73A and the valve rod 72 is screwed to one end, the on-off valve 70 makes the opening 72A of the valve rod 72 inconsistent with the oil passage 121, and the oil passage 121 (100 ) Is closed and screwed in the opposite direction, the opening 72A of the valve rod 72 is gradually matched with the oil passage 121, and the oil passage 121 (100) is opened at an opening corresponding to the amount of matching.

  Therefore, according to the vehicle height adjusting device 30 of the third embodiment, as compared with the first embodiment, the on-off valve 70 can be provided so as to be rotatable about a direction perpendicular to the axial direction of the oil passage 121 as a rotation center axis. .

Example 4 (FIGS. 6 and 7)
The vehicle height adjusting device 30 of the fourth embodiment differs from the third embodiment in that (1) a hose connector 46 provided at one end of the hydraulic hose 45 is directly connected to the sliding spring receiving member 33 via an O-ring 46A in a liquid-tight manner. The jack oil chamber 34 and the pump oil chamber 43 are connected to each other by an oil passage 100 formed continuously to the hydraulic hose 45, the hose connector 46, and the sliding spring receiving member 33, and (2) an on-off valve The on-off valve 80 instead of 70 is provided in the oil passage 100 (131, 132) provided in the sliding spring receiving member 33 and in the oil passage 131 to which the hose connector 46 is screwed and fixed.

  Here, the vehicle height adjusting device 30 is provided with a valve hole 133 orthogonal to the middle portion of the oil passage 131 in the sliding spring receiving member 33 in the sliding spring receiving member 33, and the on-off valve fitted in the valve hole 133. 80 is provided in the valve hole 133 so as to be rotatable about a direction perpendicular to the axial direction of the oil passage 131 as a rotation center axis. The on-off valve 80 has an O-ring in which a large-diameter threaded portion 81 is screwed onto a female thread 134 (coaxial with the valve hole 133) of the sliding spring receiving member 33, and a tip side valve stem 82 is provided on the sliding spring receiving member 33. An opening 82A, which is liquid-tightly inserted in 135 and penetrated in the direction perpendicular to the axis of the intermediate portion of the valve stem 82, is rotatable with respect to the oil passage 131, and an operation groove 83A is provided on the end surface of the proximal-side operation shaft 83. .

  When the rotary tool is engaged with the operation groove 83A and the valve rod 82 is screwed to one end, the on-off valve 80 makes the opening 82A of the valve rod 82 inconsistent with the oil passage 131, and the oil passage 131 (100 ) Is closed and screwed in the opposite direction, the opening 82A of the valve stem 82 is gradually matched with the oil passage 131, and the oil passage 131 (100) is opened at an opening corresponding to the amount of matching.

  Therefore, according to the vehicle height adjusting device 30 of the fourth embodiment, the number of parts can be reduced by providing the oil passage 131 provided with the on-off valve 80 in the sliding spring receiving member 33 as compared with the third embodiment.

  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, one end of the hydraulic hose may be fixed to a fixed partition member, and an open / close valve may be provided in an oil passage provided in the fixed partition member.

  The sliding spring receiving member is not limited to the one provided on the outer periphery of the fixed partition member, and the sliding spring receiving member may be provided between the outer periphery of the damper main body (cylinder) and the inner periphery of the fixed partition member.

1 is a cross-sectional view showing the overall structure of a vehicle height adjusting device for a hydraulic shock absorber according to a first embodiment. FIG. 2 is a cross-sectional view of the main part of FIG. FIG. 3 is a cross-sectional view of an essential part showing a vehicle height adjusting device for a hydraulic shock absorber according to a second embodiment. FIG. 4 is a cross-sectional view of a principal part illustrating a vehicle height adjusting device for a hydraulic shock absorber according to a third embodiment. FIG. 5 is a cross-sectional view taken along line V-V in FIG. FIG. 6 is a cross-sectional view of a principal part showing a vehicle height adjusting device for a hydraulic shock absorber according to a fourth embodiment. FIG. 7 is an arrow view along the line VII-VII in FIG.

Explanation of symbols

10 Hydraulic shock absorber 11 Cylinder (Damper body)
16 Suspension spring 30 Vehicle height adjustment device 32 Fixed partition member 33 Sliding spring receiving member 34 Jack oil chamber 40 Hydraulic pump 43 Pump oil chamber 45 Hydraulic hoses 47, 120 Joint (joint member)
50, 60, 70, 80 On-off valve 100, 102, 112, 121, 131 Oil passage 102A, 112A Valve seat surface

Claims (5)

A fixed partition member attached to the outer periphery of the damper main body, a sliding oil receiving member that seals the jack oil chamber between the fixed partition member and supports one end of the suspension spring;
A flexible hydraulic hose having one end fixed to the fixed partition member or the sliding spring receiving member and having elasticity that connects the other end to a hydraulic pump;
In the vehicle height adjusting device of the hydraulic shock absorber that adjusts the vehicle height by supplying and discharging hydraulic oil between the jack oil chamber and the pump oil chamber in the hydraulic pump,
A vehicle height adjusting device for a hydraulic shock absorber, wherein an on-off valve operable externally is provided between one end of the hydraulic hose and the jack oil chamber.   The vehicle height adjusting device for a hydraulic shock absorber according to claim 1, wherein the on-off valve is provided in an oil passage provided in the fixed partition member or the sliding spring receiving member. One end of the hydraulic hose is connected to the fixed partition member or the sliding spring receiving member via a joint member,
The vehicle height adjusting device for a hydraulic shock absorber according to claim 1, wherein the on-off valve is provided in an oil passage provided in the joint member.   The vehicle height adjusting device for a hydraulic shock absorber according to claim 2 or 3, wherein the on-off valve is provided so as to be rotatable about a direction intersecting an axial direction of the oil passage as a rotation center axis.   The vehicle height adjusting device for a hydraulic shock absorber according to claim 2 or 3, wherein a valve seat surface is formed in the oil passage, and the on-off valve is provided so as to be able to contact and separate from the valve seat surface from an axial direction of the oil passage.

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