JP2016194339A - Damping force generating device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To adjust damping force generated by a disk valve provided in an inflow port of a housing.SOLUTION: A damping force generating device (50) includes a valve housing (56) having an inflow port into which working fluid flows and an outflow port from which the working fluid flows, a compression side disk valve (60) provided in the inflow port of the valve housing (56) and generating damping force, and an adjust guide (80) moving between the compression side disk valve (60) and the outflow port of the valve housing (56) and adjusting a shape of a second flow passage (55B) through which the working fluid passes.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a damping force generator.

  A configuration for adjusting a damping force (a damping force in a medium / high speed range) generated when a piston rod of a hydraulic shock absorber operates in a medium / high speed range is disclosed in Patent Document 1 (Patent Document 1: FIG. 1). Figure 2).

  This Patent Document 1 describes a damping force adjusting portion structure including a low speed valve that generates a compression side damping force in a low speed region of the piston speed and a high speed valve that generates a compression side damping force in a medium to high speed region of the piston speed. ing. In this damping force adjusting portion structure, a high speed valve is provided inside a cylindrical housing. This high-speed valve is a disk valve provided at the inlet of hydraulic oil formed in the partition member of the housing. A communication hole communicating with the oil chamber of the reservoir tank is formed in the peripheral wall of the housing on the downstream side of the high speed valve. An adjuster case is provided that is slidably rotatable in the axial direction of the housing and has one end protruding outward from the housing end.

  When the adjuster case is rotated in the direction to close the communication hole, the hydraulic oil that has passed through the high-speed valve is further throttled by the adjuster case in the communication hole, thereby adjusting the compression side damping characteristics in the high speed region of the piston speed. The

Japanese Patent Laid-Open No. 11-311288 (published on November 9, 1999)

  An object of the present invention is to provide a damping force generating device capable of adjusting a damping force generated by a disk valve provided at an inlet of a housing with a configuration different from the configuration described in the prior art document. .

  In order to solve the above problems, a damping force generator according to the present invention is provided in a housing having an inlet through which hydraulic oil flows in and an outlet through which the hydraulic oil flows out, and at the inlet of the housing, A disk valve that generates a damping force; and a flow path adjusting member that moves between the disk valve and an outlet of the housing and adjusts a shape of a flow path through which the hydraulic oil passes. To do.

  According to this feature, the flow path adjusting member moves between the disk valve and the outlet of the housing, and adjusts the shape of the flow path through which the hydraulic oil passes. For this reason, the damping force generator which can adjust the damping force which generate | occur | produces with the disc valve provided in the inflow port of the housing can be provided.

  In the damping force generation apparatus according to the present invention, it is preferable that the flow path adjusting member has the same axial center as the housing and is movable in the axial direction.

  According to the above configuration, the damping force in the high speed region of the piston speed can be adjusted with a simple configuration in which the axial center is the same as that of the housing and is movable in the axial direction.

  In the damping force generator according to the present invention, it is preferable that at least a part of the flow path includes a gap formed between the inner peripheral surface of the housing and the outer peripheral surface of the flow path adjusting member.

  According to the above configuration, there is no need to bring the outer peripheral surface of the flow path adjusting member into contact with the inner peripheral surface of the housing as in the configuration of Patent Document 1, so that the assembly of the flow path adjusting member to the housing is improved.

  In the damping force generation device according to the present invention, the flow path adjustment member is a hollow member having an internal space, and has a bypass flow path mechanism that penetrates the disk valve and is provided in the flow path adjustment member. It is preferable that at least a part of the flow path includes a gap formed between an inner peripheral surface of the flow path adjusting member and an outer peripheral surface of the bypass flow path mechanism.

  According to the above configuration, since the member that generates the damping force in the low speed region of the piston speed can be disposed in the internal space of the flow path adjusting member, the damping force generating device can be configured in a compact manner.

  In the damping force generator according to the present invention, it is preferable that the inner peripheral surface of the flow path adjusting member has a tapered portion that opens to the inlet side.

  According to the above configuration, the damping force can be adjusted by adjusting the shape of the flow path formed along the flow path adjusting member.

  In the damping force generator according to the present invention, it is preferable that the damping force generator further includes a position adjusting mechanism capable of rotating around the axial direction and adjusting the position of the flow path adjusting member in the axial direction.

  According to the above configuration, the shape of the flow path can be adjusted with a simple configuration.

  The hydraulic shock absorber according to the present invention has an effect that the damping force generated by the disk valve provided at the inlet of the housing can be adjusted.

(A) is a front view which shows the external appearance of the hydraulic shock absorber which concerns on embodiment, (b) is the sectional side view. It is sectional drawing of the base valve apparatus provided in the said hydraulic shock absorber. It is an exploded view of the base valve device. It is sectional drawing of the base valve apparatus which concerns on a comparative example. It is an exploded view of the base valve device. It is sectional drawing which shows the modification of the adjustment guide provided in the said base valve apparatus.

  Hereinafter, embodiments of the present invention will be described in detail.

(Configuration of hydraulic shock absorber 10 according to the embodiment)
Fig.1 (a) is a front view which shows the external appearance of the hydraulic shock absorber 10 which concerns on embodiment, (b) is the side sectional drawing.

  The vehicle hydraulic shock absorber 10 includes a damper cylinder 11. A hollow piston rod 12 is inserted into the damper cylinder 11.

  The damper cylinder 11 includes a vehicle body side attachment member 14, and a wheel side attachment member 15 is attached to the piston rod 12. A suspension spring 13 is disposed between a spring receiver 17 provided on the outer periphery of the damper cylinder 11 and a spring receiver 19 attached to the wheel side attachment member 15. The elastic force of the suspension spring 13 absorbs the impact force that the vehicle receives from the road surface.

  A rod guide 21 through which the piston rod 12 passes is fitted into the inner periphery of the damper cylinder 11 in a liquid-tight manner. The rod guide 21 has an inner diameter portion including an oil seal 22, an oil seal retainer 22 </ b> A, and a bush 23. The piston rod 12 is slidably inserted into the inner diameter portion of the rod guide 21 in a fluid-tight manner. A bumper stopper 24 is provided at the end of the damper cylinder 11 on the wheel side mounting member 15 side. The bumper stopper 24 abuts against a compression side bump rubber 25 provided around the piston rod 12 and attached to the spring receiver 19 when the stroke of the piston rod 12 is most compressed, thereby restricting the maximum compression stroke. Further, the piston rod 12 has a piston holder inserted into the damper cylinder 11 and an extension side bump spring 26. At the maximum extension of the stroke of the piston rod 12, the extension side bump spring 26 abuts against the oil seal retainer 22A of the rod guide 21 to restrict the maximum extension stroke.

  The hydraulic shock absorber 10 includes a piston valve device 30 and a base valve device 50 (a damping force generator). The hydraulic shock absorber 10 dampens expansion and contraction vibrations 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 30 and the base valve device 50.

  The piston valve device 30 includes a sub-piston 31, a pressure-side sub-valve 32, a valve stopper 33, a pressure-side valve 34, a main piston 35 (piston), an extension, and a piston holder provided at the tip of the piston rod 12 inserted into the damper cylinder 11. A side valve 36 and a valve stopper 37 are mounted in this order, and these are fixed with a nut 38.

  The piston rod 12 has a bypass passage 41 having one end opened to the piston side oil chamber S2 and the other end opened to the piston rod side oil chamber S1. A damping force adjusting rod 42 that adjusts the flow passage area of the bypass passage 41 is provided in the piston rod 12.

  The hydraulic shock absorber 10 includes a sub tank 11 </ b> C that is disposed substantially parallel to the damper cylinder 11. A reservoir chamber S3 is formed inside the sub tank 11C. The sub tank 11 </ b> C has a diaphragm 52. The diaphragm 52 partitions the interior sealed by the cap 51 into a reservoir chamber S3 and a pressurized gas chamber 53. The cap 51 is provided with a gas filling valve 54. A free piston may be provided instead of the diaphragm 52, and the interior of the sub tank 11C may be partitioned into a reservoir chamber S3 and a pressurized gas chamber 53.

(Base valve device 50)
The piston side oil chamber S2 formed in the damper cylinder 11 and the reservoir chamber S3 in the sub tank 11C are communicated with each other by a passage P1. A base valve device 50 is provided in the passage P1.

  FIG. 2 is a cross-sectional view of the base valve device 50 provided in the hydraulic shock absorber 10. FIG. 3 is an exploded view of the base valve device 50.

  The base valve device 50 includes a partition wall member 55 and a valve housing 56 (housing) that are liquid-tightly provided in an intermediate portion of a passage P1 that connects the piston-side oil chamber S2 and the reservoir chamber S3. The partition wall member 55 and the valve housing 56 are fixed by plug bolts 57 screwed to the inner wall of the passage P1. The partition member 55 partitions the piston side oil chamber S2 and the reservoir chamber S3. The partition member 55 is formed with a first flow path 55A. A bypass forming bolt 58 (bypass passage mechanism) is fixed to the central portion of the partition wall member 55 with a nut 59. Around the bypass forming bolt 58, a compression side disk valve 60 (disc valve) that opens the first flow path 55A when the stroke is compressed, and an expansion side valve (check valve) 61 that conducts the first flow path 55A when the stroke is extended, Is provided. The compression side disk valve 60 is configured by laminating a large number of plate-like valve pieces. The extension-side disc valve 61 is pressed by a valve spring 61 A supported on the back surface of the partition wall member 55 so as to be seated on the valve receiver 62 sandwiched between the partition wall member 55 and the valve housing 56. The compression-side disc valve 60 is seated on the plate surface of the extension-side disc valve 61 that is seated on the valve receiver 62. A cover member 63 is attached to the partition member 55.

  A bypass passage 71 (bypass passage mechanism) that connects the piston-side oil chamber S2 and the reservoir chamber S3 is formed in the bypass forming bolt 58. The bypass passage 71 is disposed in parallel with the pressure side disk valve 60 and the extension side disk valve 61 (first flow path 55A). The base valve device 50 includes a compression side damping force adjusting device 70. The compression-side damping force adjusting device 70 includes a rod support 72 that is fluid-tightly fitted to a tip cup portion 58A (bypass flow path mechanism) of the bypass forming bolt 58, and a screw support 72 that is screwed into the rod support 72. And a damping force adjusting rod 73 for adjusting the flow path area.

  The damping force adjusting rod 73 advances and retreats in the rod support 72 by an external rotation operation of an adjuster rod 74 provided so as to penetrate inside and outside of the plug bolt 57, and the flow passage area of the bypass passage 71 by the needle valve 73A at the tip. Adjust. At this time, the bypass passage 71 communicates with the passage P1 on the reservoir chamber S3 side via the flow path 58B provided in the tip cup portion 58A of the bypass forming bolt 58 and the valve 60F.

  The distal end concave portion 74 </ b> A of the adjuster rod 74 is engaged with the proximal end convex portion of the damping force adjusting rod 73 in the rotational direction. Balls 76B urged by a set spring 76A incorporated in the adjuster rod 74 are sequentially engaged with engagement holes provided at a plurality of positions in the circumferential direction of the inner peripheral surface of the adjuster member 60D, and the adjuster rod 74 is rotated in any direction. The operation position can be set with a sense of moderation.

  A substantially cylindrical adjustment guide 80 (flow path adjusting member, position adjusting mechanism) is screwed onto the outer periphery of the adjusting member 60D in the plug bolt 57. A parallel pin 60G for preventing rotation is arranged between the adjustment guide 80 and the plug bolt 57. The adjustment guide 80 includes a thin cylindrical damping force adjustment collar portion 80A (flow path adjustment member) formed so as to protrude from the valve housing 56 toward the compression side disk valve 60, and an outer peripheral surface of the adjustment member 60D. A position adjusting portion 80B (position adjusting mechanism) to be screwed is formed. An oil seal 81 is provided between the inner peripheral surface of the damping force adjusting collar portion 80A and the outer peripheral surface of the tip cup portion 58A. A communication path 80E is formed closer to the position adjustment portion 80B than the oil seal 81 of the damping force adjustment collar portion 80A.

  As described above, the base valve device 50 of the hydraulic shock absorber 10 according to the embodiment is provided in the valve housing 56 having the inflow port through which hydraulic oil flows in and the outflow port through which hydraulic oil flows out, and the inflow port of the valve housing 56. A pressure side disk valve 60 that generates a damping force, and an adjustment guide 80 that moves between the pressure side disk valve 60 and the outlet of the valve housing 56 and adjusts the shape of the second flow path 55B through which the hydraulic oil passes. Have. The adjustment guide 80 has the same axial center as the valve housing 56 and can move in this axial direction. At least a part of the second flow path 55B includes a gap formed between the inner peripheral surface of the valve housing 56 and the outer peripheral surface of the adjustment guide 80. The adjustment guide 80 is a hollow member having an internal space, and penetrates the compression side disk valve 60. The adjustment guide 80 has a bypass flow path mechanism provided inside the adjustment guide 80. At least a part of the second flow path 55B includes a gap formed between the inner peripheral surface of the adjustment guide 80 and the outer peripheral surface of the tip cup portion 58A of the bypass flow path mechanism. The inner peripheral surface of the adjustment guide 80 has a tapered surface 80C that opens to the inlet side.

  The base valve device 50 can also be expressed as follows. That is, the base valve device 50 includes a valve housing 56 provided with a partition wall member 55, a pressure side disk valve 60 that is provided in a first flow path 55 </ b> A of hydraulic fluid formed in the partition member 55, and generates a damping force. After the fluid flows in through the disk valve 60, the second fluid flows by interposing it in the second fluid flow passage 55B (flow passage) of the hydraulic oil in the valve housing 56 until it flows out from the valve housing 56 in a position-adjustable manner. An adjustment guide 80 configured to adjust the shape of the channel 55B and adjusting the damping force by adjusting the shape of the second channel 55B is provided.

  The valve housing 56 is a hollow member in which a cylindrical inner space is formed, the partition wall member 55 is a member that covers a cylindrical bottom surface portion of the inner space, and the adjustment guide 80 has a common axial center with the inner space. This is a member having a cylindrical side surface.

  At least a part of the second flow path 55 </ b> B includes an orifice formed by a gap between the inner peripheral surface of the valve housing 56 and the outer peripheral surface of the adjustment guide 80. In this orifice, a damping force is generated particularly by the narrowing effect of a narrow flow path formed between the tip of the damping force adjusting collar portion 80A and the valve housing 56.

  The adjustment guide 80 is a hollow member. Note that the adjustment guide 80 may be a hollow member having a tapered surface 80C (tapered portion) that opens toward the partition wall member 55 (see a modification described later).

  The adjustment guide 80 is configured to be positionally adjustable in the axial direction of the internal space.

  The base valve device 50 further includes an adjustment member 60D provided to be rotatable around the axial direction. The adjustment guide 80 is configured to be able to adjust the position in the axial direction based on the rotational movement of the adjustment member 60D.

  The flow path inside the rod support 72 is connected to the inner peripheral surface of the damping force adjusting collar portion 80A, the rod support 72, and the tip cup portion 58A via a communication path (not shown) formed in the rod support 72. It communicates with the flow path between the outer peripheral surfaces of the two.

(Operation of the hydraulic shock absorber 10 according to the embodiment)
The hydraulic shock absorber 10 operates as follows to apply a damping force.

(Compression process)
In the low speed region of the stroke compression stroke of the hydraulic shock absorber 10,
(a) In the piston valve device 30, a compression-side damping force is generated by the hydraulic oil passing through the bypass passage 41 and the compression-side subvalve 32 whose opening is adjusted by the damping force adjustment rod 42,
(b) In the base valve device 50, a compression side damping force is generated by hydraulic oil corresponding to the entry volume of the piston rod 12 passing through the bypass passage 71 whose opening is adjusted by the damping force adjustment rod 73 of the compression side damping force adjustment device 70.

In the medium and high speed range,
(c) In the piston valve device 30, pressure side damping force is generated by the hydraulic oil passing through the pressure side valve 34 provided in the pressure side flow path of the main piston 35,
(d) In the base valve device 50, a compression side damping force is generated by the hydraulic oil corresponding to the entry volume of the piston rod 12 that passes through the compression side disk valve 60 provided in the first flow path 55 </ b> A of the partition wall member 55.

  In the present embodiment, a cylindrical damping force adjusting collar portion 80 </ b> A formed so as to protrude from the valve housing 56 toward the pressure side disk valve 60 is formed on the reservoir chamber S <b> 3 side of the pressure side disk valve 60. The hydraulic oil flow that has entered the first flow path 55A by pushing the compression side disk valve 60 open is throttled by the damping force adjusting collar portion 80A and flows along the outer peripheral surface of the damping force adjusting collar portion 80A. It passes through the communication hole formed. For this reason, the compression side damping force generated by the first flow path 55A and the compression side disc valve 60 can be adjusted by the damping force adjustment collar portion 80A.

  By rotating the adjusting member 60D, the position of the tip of the damping force adjusting collar portion 80A provided in the adjusting guide 80 can be adjusted in the axial direction. For this reason, it is possible to adjust the shape of the second flow path 55B through which the hydraulic oil entering from the first flow path 55A flows by pushing the pressure side disk valve 60 open. Accordingly, the adjustment amount of the compression side damping force generated by the compression side disk valve 60 can be increased or decreased.

(Extension process)
In the low speed range of the stroke extension stroke of the hydraulic shock absorber 10,
(a) In the piston valve device 30, the extension side damping force is generated by the hydraulic oil passing through the extension side valve 36 provided in the extension side flow path of the main piston 35.

  In the expansion stroke of the hydraulic shock absorber 10, the hydraulic oil in the reservoir chamber S 3 flows to the piston-side oil chamber S 2 through the expansion-side valve (check valve) 61 of the base valve device 50, but is attenuated by the expansion-side disk valve 61. Does not generate power.

  The expansion / contraction vibration of the hydraulic shock absorber 10 is damped by the damping force on the compression side and the extension side.

(Comparative example)
FIG. 4 is a cross-sectional view of a base valve device according to a comparative example. FIG. 5 is an exploded view of a base valve device according to a comparative example.

  The same components as those described above with reference to FIG. 2 are denoted by the same reference numerals. Therefore, detailed description of these components will not be repeated.

  The base valve device according to the comparative example includes a spring receiver 90A, a coil spur 90B, a spring seat 90C, and an adjustment guide 90E instead of the adjustment guide 80 of the base valve device 50 according to the embodiment.

  A coil spur 90B is disposed between a spring receiver 90A disposed on the opposite side of the expansion side disk valve 61 with respect to the compression side disk valve 60 and a spring seat 90C provided on the adjustment guide 90E. The compression side damping force generated by the hydraulic oil passing through the compression side disk valve 60 is adjusted by the spring force of the coil splong 90B.

  The damping force adjusting collar portion 80A shown in FIG. 2 enables adjustment similar to the adjustment of the compression side damping force by the spring force of the coil splong 90B. According to the configuration of the damping force adjusting collar portion 80A according to the embodiment, as shown in comparison with FIG. 3 and FIG. 5, by replacing the adjustment guide 90E with the adjustment guide 80, The spring seat 90C can be eliminated. For this reason, the structure of the base valve device 50 for adjusting the damping force can be simplified, the number of parts can be reduced, and the assemblability can be improved. Further, the adjustment guide 80 of the embodiment can be obtained simply by changing the shape of the adjustment guide 90E of the comparative example.

  Further, in the configuration of the comparative example of FIG. 4, the components of the spring receiver 90 </ b> A, the coil splong 90 </ b> B, and the spring seat 90 </ b> C are disposed in the hydraulic oil flow passage 55 </ b> C that flows by pushing the pressure-side disc valve 60 open. The smooth flow of hydraulic oil cannot be secured. In the configuration shown in FIG. 2 according to the present embodiment, the components of the spring receiver 90A, the coil spur 90B, and the spring seat 90C are eliminated, and the hydraulic oil flows along the outer periphery of the damping force adjusting collar portion 80A. Smooth flow can be ensured.

(Modification)
FIG. 6 is a cross-sectional view showing a modification of the adjustment guide provided in the base valve device. The detailed description of the components described above with reference to FIG. 2 will not be repeated.

  2 is different from the base valve device 50 described above in FIG. 2 in that a tapered surface 80C (tapered shape) is inclined on the inner periphery of the damping force adjusting collar portion 80A of the adjusting guide 80 so as to approach the axial center toward the adjusting member 60D side. The inner peripheral surface) is formed, and the communication hole 80D penetrating from the tapered surface 80C of the damping force adjusting collar portion 80A to the outer peripheral surface is formed at a position corresponding to the passage P1.

  The flow of hydraulic oil that has entered the first flow path 55A by pushing the compression side disk valve 60 open flows along the taper surface 80C of the damping force adjusting collar portion 80A, and the communication hole 80D formed in the damping force adjusting collar portion 80A. And through a communication hole formed in the valve housing 56. For this reason, the compression side damping force generated by the first flow path 55A and the compression side disc valve 60 can be adjusted by the damping force adjustment collar portion 80A.

(Effect of embodiment)
Therefore, according to this embodiment, there are the following effects.

  The second adjustment guide 80 is interposed in the second flow path 55B of the hydraulic oil in the valve housing 56 until it flows out from the valve housing 56 after flowing in through the pressure side disk valve 60, and thereby the second adjustment guide 80 is interposed. The shape of the flow path 55B is adjusted. By adjusting the shape of the second flow path 55B, the damping force of the compression side disk valve 60 provided in the first flow path 55A of the hydraulic oil formed in the partition wall member 55 is adjusted. For this reason, the base valve apparatus 50 which can adjust the damping force in the high speed region of piston speed can be provided.

  In addition, the damping force in the high speed region of the piston speed can be adjusted with a simple configuration in which the cylindrical guide side surface having the common axis and the cylindrical inner space of the valve housing 56 is formed in the adjustment guide 80.

  At least a part of the second flow path 55B includes a gap formed between the inner peripheral surface of the valve housing 56 and the outer peripheral surface of the adjustment guide 80. For this reason, it is not necessary to bring the outer peripheral surface of the adjustment guide 80 into contact with the inner peripheral surface of the valve housing 56 as in the configuration of Patent Document 1, so that the assembly of the adjustment guide 80 to the valve housing 56 is improved.

  The adjustment guide 80 is a hollow member. For this reason, since the member which generate | occur | produces the damping force in the low speed area | region of piston speed can be arrange | positioned in the internal space of the adjustment guide 80, the base valve apparatus 50 can be comprised compactly.

  When the adjustment guide 80 is a hollow member having a tapered surface 80C that opens toward the partition wall member 55, the damping force is adjusted by adjusting the shape of the second flow path 55B formed along the tapered surface 80C of the adjustment guide 80. be able to.

  Since the direction in which the position of the adjustment guide 80 can be adjusted is the axial direction of the internal space of the valve housing 56, the position of the adjustment guide 80 can be adjusted with a simple configuration.

  The base valve device 50 further includes an adjustment member 60D provided to be rotatable around the axial direction, and an adjustment guide 80 is configured to be able to adjust the position in the axial direction based on the rotational movement of the adjustment member 60D. The For this reason, the shape of the second flow path 55B can be adjusted with a simple configuration.

  In this embodiment, since the position where the second flow path 55B whose shape is changed by the adjustment guide 80 exists is inside the valve housing 56, there is a flow path (communication hole) whose shape is changed by the adjuster case. The degree of freedom in changing the flow path shape is greater than in the configuration of Patent Document 1 where the position is the peripheral wall of the housing. Accordingly, the degree of freedom in adjusting the compression side damping characteristics in the high speed range is expanded.

  The present invention is not limited to the above-described embodiments, and various modifications are possible within the scope shown in the claims, and embodiments obtained by appropriately combining technical means disclosed in different embodiments. Is also included in the technical scope of the present invention.

  The present invention can be used for a hydraulic shock absorber for a vehicle. The present invention can be used for, for example, a rear cushion and a front fork of a motorcycle, and can be used for a suspension fork of a bicycle such as a mountain bike.

10 Hydraulic shock absorber 11 Damper cylinder 12 Piston rod 35 Main piston (piston)
50 Base valve device (damping force generator)
55 Partition member 55A First flow path 55B Second flow path (flow path)
56 Valve housing (housing)
58 Bypass forming bolt (Bypass channel mechanism)
58A Tip cup (bypass channel mechanism)
71 Bypass passage (bypass passage mechanism)
60 Pressure side disc valve (disc valve)
60D adjustment member 80 adjustment guide (flow path adjustment member, position adjustment mechanism)
80A Damping force adjusting collar (channel adjusting member)
80B Position adjustment unit (position adjustment mechanism)
80C taper surface (tapered part)
80D Communication hole S1 Piston rod side oil chamber S2 Piston side oil chamber S3 Reservoir chamber

Claims (6)

A housing having an inlet through which hydraulic oil flows in and an outlet through which the hydraulic oil flows out;
A disk valve provided at the inlet of the housing for generating a damping force;
A flow path adjusting member that moves between the disk valve and the outlet of the housing and adjusts the shape of the flow path through which the hydraulic oil passes;
A damping force generator characterized by comprising:   The damping force generation device according to claim 1, wherein the flow path adjusting member has the same axial center as the housing and is movable in the axial direction.   The damping force generation device according to claim 2, wherein at least a part of the flow path includes a gap formed between an inner peripheral surface of the housing and an outer peripheral surface of the flow path adjusting member. The flow path adjustment member is a hollow member having an internal space,
Passing through the disk valve, having a bypass flow path mechanism provided inside the flow path adjustment member,
The damping force generation device according to claim 2, wherein at least a part of the flow path includes a gap formed between an inner peripheral surface of the flow path adjusting member and an outer peripheral surface of the bypass flow path mechanism.   The damping force generation device according to claim 4, wherein the inner peripheral surface of the flow path adjusting member has a tapered portion that opens toward the inflow port.   The damping force generation device according to claim 2, wherein the flow path adjustment member further includes a position adjustment mechanism that rotates around the axial direction and is capable of adjusting a position of the flow path adjustment member in the axial direction.

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