WO2018164167A1 - 緩衝器 - Google Patents
緩衝器 Download PDFInfo
- Publication number
- WO2018164167A1 WO2018164167A1 PCT/JP2018/008702 JP2018008702W WO2018164167A1 WO 2018164167 A1 WO2018164167 A1 WO 2018164167A1 JP 2018008702 W JP2018008702 W JP 2018008702W WO 2018164167 A1 WO2018164167 A1 WO 2018164167A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- disk
- passage
- piston
- valve
- damping force
- Prior art date
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/32—Details
- F16F9/34—Special valve constructions; Shape or construction of throttling passages
- F16F9/348—Throttling passages in the form of annular discs or other plate-like elements which may or may not have a spring action, operating in opposite directions or singly, e.g. annular discs positioned on top of the valve or piston body
- F16F9/3485—Throttling passages in the form of annular discs or other plate-like elements which may or may not have a spring action, operating in opposite directions or singly, e.g. annular discs positioned on top of the valve or piston body characterised by features of supporting elements intended to guide or limit the movement of the annular discs
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/32—Details
- F16F9/34—Special valve constructions; Shape or construction of throttling passages
- F16F9/348—Throttling passages in the form of annular discs or other plate-like elements which may or may not have a spring action, operating in opposite directions or singly, e.g. annular discs positioned on top of the valve or piston body
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2202/00—Indexing codes relating to the type of spring, damper or actuator
- B60G2202/20—Type of damper
- B60G2202/24—Fluid damper
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2206/00—Indexing codes related to the manufacturing of suspensions: constructional features, the materials used, procedures or tools
- B60G2206/01—Constructional features of suspension elements, e.g. arms, dampers, springs
- B60G2206/40—Constructional features of dampers and/or springs
- B60G2206/41—Dampers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/06—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using both gas and liquid
- F16F9/062—Bi-tubular units
Definitions
- the present invention relates to a shock absorber.
- This application claims priority on March 10, 2017 based on Japanese Patent Application No. 2017-046272 for which it applied to Japan, and uses the content here.
- Some shock absorbers have variable damping force in response to frequency.
- An object of the present invention is to provide a shock absorber capable of improving productivity.
- One aspect of the present invention includes a cylinder in which a working fluid is sealed, a piston slidably inserted into the cylinder, a piston rod connected to the piston, and a working fluid generated by sliding the piston.
- a disc valve provided so as to restrict the flow of the cylindrical case member and close the opening of the cylindrical case member, an annular seal member provided on at least one side of the disc valve, and the disc valve and the seal member.
- the disc valve is formed with recesses and projections alternately.
- the shaft portion is penetrated inward and disposed in the case member, the inner peripheral side or the outer peripheral side is supported, and the non-support side is between the case member or the shaft portion.
- It has a deflectable annular disc provided with an annular elastic member for sealing.
- An annular gap is provided between the disk and the case member or the shaft portion.
- the elastic member is fixedly provided on both sides of the disc through the gap.
- a seal portion is provided on one surface side of the disk, and a stopper portion is provided on the other surface side.
- An elastic member is partially fixed to the other surface of the disk in the circumferential direction.
- the shaft portion is penetrated inward and disposed in the case member, the inner peripheral side or the outer peripheral side is supported, and the non-support side is between the case member or the shaft portion.
- a bendable annular disk provided with an annular elastic member for sealing.
- An annular gap is provided between the disk and the case member or the shaft portion.
- the elastic member is fixedly provided on both sides of the disc through the gap.
- a seal portion is provided on one surface side of the disk, and a stopper portion is provided on the other surface side.
- a plurality of notches are provided on the gap side of the disk.
- FIG. 6 is a cross-sectional view taken along the line X1-X1 of FIG. 5 showing a partition disk of the shock absorber according to the first embodiment.
- FIG. 9 is a cross-sectional view taken along the line X2-X2 of FIGS.
- FIG. 9 is a sectional view taken along the line Y2-Y2 of FIGS. 7 and 8 showing a partition disk of a shock absorber according to a second embodiment.
- It is a perspective view which shows the division disk of the buffer of 3rd Embodiment.
- It is a top view which shows the disk of the division disk of the buffer of 3rd Embodiment.
- FIG. 10 which shows the division
- FIG. 18 It is a top view which shows the division disk of the buffer of 6th Embodiment. It is X4-X4 sectional drawing of FIG. 18 which shows the division
- the shock absorber 1 of the first embodiment is a so-called double cylinder type hydraulic shock absorber.
- the shock absorber 1 includes a cylinder 2 in which an oil liquid (not shown) as a working fluid is enclosed.
- the cylinder 2 includes a cylindrical inner cylinder 3, a bottomed cylindrical outer cylinder 4, and a cover 5.
- the outer cylinder 4 has a larger diameter than the inner cylinder 3 and is provided concentrically with the inner cylinder 3 so as to cover the inner cylinder 3.
- the cover 5 covers the upper opening side of the outer cylinder 4.
- a reservoir chamber 6 is formed between the inner cylinder 3 and the outer cylinder 4.
- the outer cylinder 4 includes a cylindrical body member 11 and a bottom member 12.
- the bottom member 12 is fitted and fixed to the lower side of the body member 11 to close the lower part of the body member 11.
- a mounting eye 13 is fixed to the bottom member 12 on the outer side opposite to the body member 11.
- the cover 5 has a cylindrical portion 15 and an inner flange portion 16.
- the inner flange portion 16 extends radially inward from the upper end side of the tubular portion 15.
- the cover 5 is covered with the body member 11 so that the upper end opening of the body member 11 is covered with the inner flange portion 16 and the outer peripheral surface of the body member 11 is covered with the tubular portion 15. In this state, the cover 5 is fixed to the body member 11 by caulking a part of the cylindrical portion 15 radially inward.
- the shock absorber 1 includes a piston 18.
- the piston 18 is slidably inserted into the inner cylinder 3 of the cylinder 2.
- the piston 18 is fitted into the inner cylinder 3.
- the piston 18 divides the inner cylinder 3 into two chambers, one upper chamber 19 (cylinder chamber, one cylinder chamber) and the other lower chamber 20 (cylinder chamber).
- An oil liquid as a working fluid is sealed in the upper chamber 19 and the lower chamber 20 in the inner cylinder 3.
- oil and gas as working fluid are sealed.
- the shock absorber 1 includes a piston rod 21.
- One end of the piston rod 21 in the axial direction is disposed in the inner cylinder 3 of the cylinder 2, and this one end is connected to the piston 18.
- the other end side in the axial direction of the piston rod 21 extends to the outside of the cylinder 2.
- the piston 18 and the piston rod 21 move together.
- the extension stroke of the shock absorber 1 is a stroke in which the piston rod 21 increases the amount of protrusion from the cylinder 2. In this extension stroke, the piston 18 moves to the upper chamber 19 side.
- the contraction stroke of the shock absorber 1 is a stroke in which the piston rod 21 reduces the amount of protrusion from the cylinder 2. In this contraction stroke, the piston 18 moves to the lower chamber 20 side.
- the rod guide 22 is fitted to the upper end opening side of the inner cylinder 3 and the outer cylinder 4.
- a seal member 23 is attached to the outer cylinder 4 on the upper side, which is the outer side of the cylinder 2, than the rod guide 22.
- a friction member 24 is provided between the rod guide 22 and the seal member 23.
- the rod guide 22, the seal member 23, and the friction member 24 all have an annular shape.
- the piston rod 21 is slidably inserted inside each of the rod guide 22, the friction member 24, and the seal member 23.
- the piston rod 21 is inserted through the rod guide 22, the friction member 24, and the seal member 23, and extends from the inside of the cylinder 2 to the outside.
- the rod guide 22 supports the piston rod 21 so as to be movable in the axial direction while restricting its radial movement.
- the rod guide 22 guides the movement of the piston rod 21.
- the seal member 23 is in close contact with the outer cylinder 4 at the outer peripheral portion thereof.
- the seal member 23 is in sliding contact with the outer peripheral portion of the piston rod 21 moving in the axial direction at the inner peripheral portion thereof.
- the seal member 23 prevents the oil liquid in the inner cylinder 3 and the high-pressure gas and oil liquid in the reservoir chamber 6 in the outer cylinder 4 from leaking to the outside.
- the friction member 24 is in sliding contact with the outer peripheral portion of the piston rod 21 at the inner peripheral portion thereof.
- the friction member 24 generates a frictional resistance on the piston rod 21.
- the friction member 24 is not intended for sealing.
- the outer periphery of the rod guide 22 has a stepped shape in which the upper part has a larger diameter than the lower part.
- the rod guide 22 is fitted to the inner peripheral portion of the upper end of the inner cylinder 3 at the lower portion of the small diameter.
- the rod guide 22 is fitted to the inner peripheral portion of the upper portion of the outer cylinder 4 at the upper portion of the large diameter.
- a base valve 25 is installed on the bottom member 12 of the outer cylinder 4.
- the base valve 25 defines the lower chamber 20 and the reservoir chamber 6.
- the base valve 25 is fitted with the inner peripheral portion at the lower end of the inner cylinder 3.
- a part (not shown) of the upper end portion of the outer cylinder 4 is crimped inward in the radial direction. This caulking portion of the outer cylinder 4 and the rod guide 22 sandwich the seal member 23.
- the piston rod 21 has a main shaft portion 27 and an attachment shaft portion 28 (shaft portion).
- the attachment shaft portion 28 has a smaller diameter than the main shaft portion 27.
- the mounting shaft portion 28 is disposed in the cylinder 2.
- a piston 18 or the like is attached to the attachment shaft portion 28.
- An end portion of the main shaft portion 27 on the mounting shaft portion 28 side is a shaft step portion 29.
- the shaft step portion 29 extends in the direction perpendicular to the axis.
- a passage groove 30 is formed on the outer peripheral portion of the attachment shaft portion 28 at an intermediate position in the axial direction.
- the passage groove 30 is formed by cutting out the outer peripheral portion of the mounting shaft portion 28.
- the passage groove 30 extends in the axial direction of the mounting shaft portion 28.
- a male screw 31 is formed on the outer peripheral portion of the mounting shaft portion 28.
- the male screw 31 is formed at a tip position opposite to the main shaft portion 27 in the axial direction of the mounting shaft portion 28.
- the passage groove 30 is formed so that a cross-sectional shape on a plane orthogonal to the central axis of the piston rod 21 is any one of a rectangle, a square, and a D-shape.
- the piston rod 21 is provided with an annular stopper member 32 and a buffer 33.
- the stopper member 32 and the buffer 33 are provided in a portion of the main shaft portion 27 between the piston 18 and the rod guide 22.
- the stopper member 32 has the piston rod 21 inserted through the inner peripheral side.
- the stopper member 32 is swaged and fixed to a fixing groove 34 that is recessed inward in the radial direction of the main shaft portion 27.
- the shock absorber 33 also has the piston rod 21 inserted inside.
- the buffer 33 is disposed between the stopper member 32 and the rod guide 22.
- the shock absorber 1 is supported by the vehicle body with, for example, a protruding portion of the piston rod 21 from the cylinder 2 arranged at the top.
- a mounting eye 13 on the cylinder 2 side is arranged in the lower part and connected to the wheel side.
- the shock absorber 1 may be configured such that the cylinder 2 side is supported by the vehicle body and the piston rod 21 is connected to the wheel side.
- the shock absorber 1 when the wheel vibrates as the vehicle travels, the positions of the cylinder 2 and the piston rod 21 change relatively with the vibration. This change is suppressed by the fluid resistance of the flow path formed in at least one of the piston 18 and the piston rod 21.
- the fluid resistance of the flow path formed in at least one of the piston 18 and the piston rod 21 is made different depending on the vibration speed and amplitude. By suppressing vibration in this way, the riding comfort of the vehicle is improved. Vibration generated by the wheels acts between the cylinder 2 and the piston rod 21. In addition, inertial force and centrifugal force generated in the vehicle body as the vehicle travels also act between the cylinder 2 and the piston rod 21. For example, a centrifugal force is generated in the vehicle body when the traveling direction is changed by a steering operation. A force based on this centrifugal force acts between the cylinder 2 and the piston rod 21. As will be described below, the shock absorber 1 has good characteristics against vibration based on the force generated in the vehicle body as the vehicle travels. The shock absorber 1 provides high stability in running the vehicle.
- the piston 18 includes a metal piston main body 35 and a synthetic resin sliding member 36.
- the piston body 35 is supported by the piston rod 21.
- the sliding member 36 has an annular shape and is integrally mounted on the outer peripheral surface of the piston main body 35. In the piston 18, the sliding member 36 slides in the inner cylinder 3.
- the piston body 35 is provided with a plurality of passage holes 37 and a plurality of passage holes 39. Only one of the plurality of passage holes 37 is shown in FIG. A plurality of passage holes 39 are also shown in FIG. The plurality of passage holes 37 allow the upper chamber 19 and the lower chamber 20 to communicate with each other. The plurality of passage holes 39 also connect the upper chamber 19 and the lower chamber 20. The plurality of passage holes 37 are formed at an equal pitch in the circumferential direction with one passage hole 39 interposed therebetween. As a result, the plurality of passage holes 37 constitute half of all the passage holes 37 and 39. In the plurality of passage holes 37, the first side (the upper side in FIG.
- the second side (the lower side in FIG. 2), which is the other side in the axial direction of the piston 18, opens inward in the radial direction of the piston 18.
- a damping force generating mechanism 41 is provided in these passage holes 37.
- the damping force generation mechanism 41 opens and closes the passage portions in the passage holes 37 to generate a damping force.
- the damping force generation mechanism 41 is disposed on the lower chamber 20 side in the axial direction, which is one end side in the axial direction of the piston 18.
- the damping force generation mechanism 41 is attached to the piston rod 21.
- the damping force generation mechanism 41 is disposed on the lower chamber 20 side.
- a damping force generation mechanism 41 is provided for the passage portions in the passage holes 37.
- the damping force generating mechanism 41 generates a damping force by suppressing the flow of the oil liquid in the passage portion in the extension side passage hole 37.
- the damping force generation mechanism 41 is an extension side damping force generation mechanism.
- the passage holes 39 constituting the remaining half shown in FIG. 2 are formed at an equal pitch in the circumferential direction with one passage hole 37 interposed therebetween.
- the second side (the lower side in FIG. 2), which is the other side in the axial direction of the piston 18, opens outward in the radial direction of the piston 18.
- the first side (the upper side in FIG. 2) that is one side in the axial direction of the piston 18 is open to the inside in the radial direction of the piston 18.
- a damping force generating mechanism 42 is provided in these passage holes 39.
- the damping force generation mechanism 42 opens and closes the passage portions in the passage holes 39 to generate a damping force.
- the damping force generation mechanism 42 is arranged on the upper chamber 19 side in the axial direction, which is the other end side of the piston 18 in the axial direction.
- the damping force generation mechanism 42 is attached to the piston rod 21.
- the damping force generation mechanism 42 is disposed on the upper chamber 19 side.
- the passage portion formed inside each of the plurality of passage holes 39 is a passage through which oil liquid flows from the lower chamber 20 toward the upper chamber 19 during the movement of the piston 18 toward the lower chamber 20, that is, in the contraction stroke. It becomes.
- a damping force generating mechanism 42 is provided for the passage portions in these passage holes 39.
- the damping force generation mechanism 42 generates a damping force by suppressing the flow of the oil liquid in the passage portion in the passage hole 39 on the contraction side.
- the damping force generation mechanism 42 is a contraction-
- the passage portions in the plurality of passage holes 37 and the passage portions in the plurality of passage holes 39 communicate with each other so that the oil liquid flows between the upper chamber 19 and the lower chamber 20 by the movement of the piston 18. become.
- the oil liquid passes through the passage portion in the passage hole 37 when the piston rod 21 and the piston 18 move to the extending side (the upper side in FIG. 2).
- the oil liquid passes through the passage portion in the passage hole 39 when the piston rod 21 and the piston 18 move to the contraction side (lower side in FIG. 2).
- the piston main body 35 has a substantially disc shape.
- a fitting hole 45 is formed in the center of the piston body 35 in the radial direction so as to penetrate in the axial direction.
- the fitting hole 45 fits the mounting shaft portion 28 of the piston rod 21.
- the end of the piston body 35 on the lower chamber 20 side in the axial direction supports the inner peripheral side of the damping force generating mechanism 41 at the portion between the fitting hole 45 and the passage hole 37.
- the end of the piston main body 35 on the side of the upper chamber 19 in the axial direction supports the inner peripheral side of the damping force generating mechanism 42 at the portion between the fitting hole 45 and the passage hole 39.
- An annular valve seat 47 is formed at the end of the piston body 35 in the axial lower chamber 20 side.
- the valve seat portion 47 is formed on the outer side in the radial direction of the piston main body 35 from the opening on the lower chamber 20 side of the passage hole 37 of the piston main body 35.
- the valve seat portion 47 is a part of the damping force generation mechanism 41.
- An annular valve seat 49 is formed at the end of the piston main body 35 in the axial upper chamber 19 side.
- the valve seat portion 49 is formed on the outer side in the radial direction of the piston main body 35 with respect to the opening on the upper chamber 19 side of the passage hole 39 of the piston main body 35.
- the valve seat portion 49 is a part of the damping force generation mechanism 42.
- the fitting hole 45 of the piston main body 35 has a small diameter hole 201 and a large diameter hole 202.
- the small diameter hole 201 is provided on the valve seat 49 side in the axial direction of the fitting hole 45.
- the small diameter hole 201 fits the mounting shaft portion 28 of the piston rod 21.
- the large diameter hole 202 has a larger diameter than the small diameter hole 201.
- the large-diameter hole 202 is provided closer to the valve seat 47 in the axial direction than the small-diameter hole 201 of the fitting hole 45.
- the side opposite to the fitting hole 45 of the valve seat portion 47 has a step shape whose axial height is lower than that of the valve seat portion 47.
- an opening on the lower chamber 20 side of the passage portion in the passage hole 39 on the contraction side is arranged at this stepped portion.
- the side opposite to the fitting hole 45 of the valve seat portion 49 has a step shape whose axial direction height is lower than that of the valve seat portion 49.
- an opening on the upper chamber 19 side of the passage portion in the extension-side passage hole 37 is arranged at this stepped portion.
- the piston 18 includes, in order from the piston 18 side in the axial direction, one disk 51, one disk 211, one disk 212, one disk 213, and one disk.
- One pilot valve 52, one disk 53, one disk 54, one pilot case 55 (case member), one disk 56, one disk 57, and one disk 58, one disk 59, one disk 60, one disk 61, and one disk 62 are stacked.
- the disks 51, 53, 54, 56 to 62, 211, 212, 213 and the pilot case 55 are all made of metal.
- Each of the disks 51, 53, 54, 56 to 62, 211, 212, and 213 has a perforated flat plate shape with a constant thickness, and any of them can fit the mounting shaft portion 28 of the piston rod 21 inside. It has become.
- the pilot valve 52 and the pilot case 55 have an annular shape, and the mounting shaft portion 28 of the piston rod 21 can be fitted inside the pilot valve 52 and the pilot case 55.
- the disk 213 has a strip shape.
- the disks 51, 53, 54, 56 to 62, 211, and 212 other than the disk 213 have a disk shape.
- the pilot case 55 has a bottomed cylindrical shape.
- the pilot case 55 has a perforated disk-shaped bottom portion 71, an inner cylindrical portion 72, and an outer cylindrical portion 73.
- the inner cylindrical portion 72 is formed on the inner peripheral side of the bottom portion 71.
- the inner cylindrical portion 72 has a cylindrical shape along the thickness direction of the bottom portion 71.
- the outer cylindrical portion 73 is formed on the outer peripheral side of the bottom portion 71.
- the outer cylindrical portion 73 has a cylindrical shape along the thickness direction of the bottom portion 71.
- the bottom portion 71 is shifted to one side in the axial direction with respect to the inner cylindrical portion 72 and the outer cylindrical portion 73.
- a through hole 74 penetrating in the axial direction is formed in the bottom 71.
- a small diameter hole 75 and a large diameter hole 76 are formed on the inner periphery of the inner cylindrical portion 72.
- the small diameter hole portion 75 is formed on the bottom portion 71 side in the axial direction of the inner cylindrical portion 72.
- the small diameter hole portion 75 fits the mounting shaft portion 28 of the piston rod 21.
- the large-diameter hole 76 is formed on the side opposite to the bottom 71 in the axial direction of the inner cylindrical portion 72.
- the large diameter hole portion 76 has a larger diameter than the small diameter hole portion 75.
- the end of the inner cylindrical portion 72 of the pilot case 55 opposite to the axial bottom 71 supports the inner peripheral side of the disk 54.
- the end of the inner cylindrical portion 72 on the bottom 71 side in the axial direction supports the inner peripheral side of the disk 56.
- An end of the outer cylindrical portion 73 of the pilot case 55 on the side of the bottom portion 71 in the axial direction is an annular valve seat portion 79.
- a pilot chamber 80 (chamber) is provided between the inner cylindrical portion 72 and the outer cylindrical portion 73 of the pilot case 55.
- the pilot chamber 80 includes a through hole 74.
- the pilot chamber 80 is separated from the lower chamber 20 by a pilot valve 52 having a disk 85 and a seal portion 86.
- the pilot chamber 80 applies pressure to the pilot valve 52 including the disk 85 in the direction of the piston 18.
- the pilot chamber 80 is a back pressure chamber that applies a back pressure to the pilot valve 52.
- the outer diameter of the disk 51 is smaller than the inner diameter of the valve seat portion 47.
- a cutout 87 is formed in the disk 51.
- the notch 87 extends radially outward from the inner peripheral edge portion that fits into the mounting shaft portion 28 of the piston rod 21 of the disk 51.
- the passage portion in the notch 87 is always in communication with the passage portion in the passage hole 37 of the piston 18.
- the passage portion in the passage hole 37 is connected to the passage portion between the large-diameter hole portion 202 of the piston 18 and the mounting shaft portion 28 and the passage groove 30 of the piston rod 21 through the passage portion in the notch 87. It always communicates with the passage.
- the outer diameter of the disk 211 is larger than the outer diameter of the valve seat portion 47 of the piston 18.
- the disk 211 is in contact with the valve seat portion 47.
- the disk 211 opens and closes the opening of the passage portion in the passage hole 37 by being separated from and in contact with the valve seat portion 47.
- the passage hole 37 is formed in the piston 18.
- the disk 211 has a notch 215 formed on the outer peripheral side.
- the notch 215 crosses the valve seat portion 47 in the radial direction.
- Inside the notch 215 is a fixed orifice 216.
- the fixed orifice 216 always connects the passage portion in the passage hole 37 to the lower chamber 20.
- the disk 212 has a circular outer periphery, and the outer diameter thereof is the same as the outer diameter of the disk 211.
- the disk 211 comes into contact with the valve seat portion 47 of the piston 18.
- the discs 211 and 212 open and close the opening of the passage portion in the passage hole 37 formed in the piston 18 by the disc 211 being separated from and in contact with the valve seat portion 47.
- the disk 213 has a long strip shape in one direction.
- the maximum outer diameter of the disk 213 is smaller than the outer diameter of the disks 211 and 212.
- the pilot valve 52 includes a metal disc 85 (disc valve) and a rubber seal portion 86.
- the seal portion 86 is annular and is provided on one surface side of the disk 85.
- the seal part 86 is fixed to the disk 85.
- the disk 85 is a perforated circular flat plate having a constant thickness.
- the disc 85 can be fitted with the mounting shaft portion 28 of the piston rod 21 inside.
- the disk 85 is provided so as to close the opening of the cylindrical pilot case 55.
- the outer diameter of the disk 85 is slightly larger than the outer diameter of the disks 211 and 212.
- the seal portion 86 is fixed to the outer peripheral side opposite to the piston 18 in the axial direction of the disk 85.
- the seal portion 86 has an annular shape.
- the pilot valve 52 has an annular seal portion 86 on the outer periphery thereof.
- the seal portion 86 is slidably and liquid-tightly fitted over the entire inner peripheral surface of the outer cylindrical portion 73 of the pilot case 55.
- the seal part 86 always seals the gap between the pilot valve 52 and the outer cylindrical part 73.
- the pilot valve 52 has the seal portion 86 slidably and closely fitted to the outer cylindrical portion 73 of the pilot case 55.
- the pilot valve 52 and the pilot case 55 form a pilot chamber 80 between them.
- the disk 211 can be seated on the valve seat 47 of the piston 18 as described above.
- the disks 211 to 213 and the pilot valve 52 constitute a damping valve 231.
- the damping valve 231 is provided in a passage portion in a passage hole 37 formed in the piston 18.
- the damping valve 231 generates a damping force by suppressing the flow of the oil liquid caused by the sliding of the piston 18 toward the extending side (the upper side in FIG. 4).
- the pilot chamber 80 is located between the pilot valve 52 and the pilot case 55. The pilot chamber 80 applies an internal pressure to the damping valve 231 in the direction of the piston 18, that is, the valve closing direction in which the disk 211 is seated on the valve seat portion 47.
- the damping valve 231 is a pilot type damping valve having the pilot chamber 80.
- the opening of the damping valve 231 including the disk 85 is controlled by the pressure in the pilot chamber 80.
- the damping valve 231 and the pilot chamber 80 constitute a part of the damping force generation mechanism 41.
- the damping force generation mechanism 41 includes the damping valve 231 and the pilot chamber 80.
- the damping force generation mechanism 41 is a pressure control type valve mechanism.
- the outer diameter of the disk 53 is substantially the same as the outer diameter of the end of the inner cylindrical part 72 of the pilot case 55 on the disk 53 side.
- the outer diameter of the disk 54 is larger than the outer diameter of the portion of the inner cylindrical portion 72 that contacts this.
- a cutout 91 is formed in the disk 54.
- the notch 91 extends radially outward from the inner peripheral edge of the disk 54 that fits into the mounting shaft portion 28 of the piston rod 21.
- the passage portion in the notch 91 is always in communication with the pilot chamber 80.
- the pilot chamber 80 has a passage portion between the large-diameter hole portion 76 of the pilot case 55 and the mounting shaft portion 28, a passage portion in the passage groove 30 of the piston rod 21, and a passage portion in the notch 91. Always in communication.
- the back pressure chamber inflow passage portion 235 always connects the passage portion in the passage hole 37 of the piston 18 and the pilot chamber 80.
- the back pressure chamber inflow passage portion 235 introduces oil into the pilot chamber 80 from the passage portion in the passage hole 37.
- the damping valve 231 is opened when its disk 211 is separated from the valve seat 47 of the piston 18. Then, the damping valve 231 causes the oil liquid from the passage portion in the passage hole 37 to flow into the lower chamber 20 through the passage portion 88.
- the passage portion 88 is a portion that extends in the radial direction between the piston 18 and the outer cylindrical portion 73 of the pilot case 55.
- the passage 101 an oil liquid as a working fluid flows from one upper chamber 19 toward the other lower chamber 20 in the movement of the piston 18 toward the upper chamber 19 side, that is, in the extension stroke.
- the passage 101 is a stretch-side passage.
- the extension-side damping force generation mechanism 41 includes a valve seat portion 47 and a damping valve 231.
- the damping force generation mechanism 41 is provided in the passage 101.
- the damping force generation mechanism 41 opens and closes the passage 101 by the damping valve 231 and suppresses the flow of the oil liquid. Thereby, the damping force generation mechanism 41 generates a damping force.
- the extension-side damping force generation mechanism 41 introduces a part of the flow of the oil into the pilot chamber 80 via the back pressure chamber inflow passage portion 235.
- the damping force generation mechanism 41 controls the opening of the damping valve 231 by the pressure in the pilot chamber 80.
- the disk 85 applies the pressure of the pilot chamber 80 to the disks 211 and 212. Thereby, the disc 85 restricts the flow of the working fluid in the passage 101 caused by the sliding of the piston 18 in the inner cylinder 3.
- the disk 85 is a disk valve.
- the outer diameter of the disk 56 is smaller than the inner diameter of the valve seat 79 of the pilot case 55.
- the outer diameter of the disk 57 is slightly larger than the outer diameter of the valve seat portion 79.
- the disc 57 can be seated on the valve seat portion 79.
- the disc 57 has a notch 93 formed on the outer peripheral side. The notch 93 crosses the valve seat portion 79 in the radial direction.
- the outer diameters of the disk 58, the disk 59, and the disk 60 are the same as the outer diameter of the disk 57.
- the outer diameter of the disk 61 is smaller than the outer diameter of the disk 60.
- the outer diameter of the disk 62 is larger than the outer diameter of the disk 61 and smaller than the outer diameter of the disk 60.
- the discs 57 to 60 constitute a valve member 99 that is a disc valve that can be detachably seated on the valve seat portion 79.
- the valve member 99 is separated from the valve seat portion 79 to allow the pilot chamber 80 and the lower chamber 20 to communicate with each other and suppress the flow of the oil between them.
- a passage portion formed inside each of the plurality of passage holes 37, the back pressure chamber inflow passage portion 235, the pilot chamber 80, and between the valve member 99 and the valve seat portion 79 constitute a passage 103. ing.
- the passage 103 communicates with the upper chamber 19 and the lower chamber 20 in part in parallel with the passage 101.
- the valve member 99 is separated from the valve seat portion 79 when the pressure in the pilot chamber 80 reaches a predetermined pressure.
- the valve member 99 constitutes a damping force generating mechanism 105 together with the valve seat portion 79.
- the damping force generation mechanism 105 opens when the pressure in the pilot chamber 80 reaches a predetermined pressure, and opens the passage 103 to generate a damping force.
- the pilot chamber 80 is formed by being surrounded by the pilot valve 52, the pilot case 55, and the valve member 99.
- a passage portion inside the notch 93 of the disk 57 constitutes a fixed orifice 100.
- the fixed orifice 100 allows the pilot chamber 80 to communicate with the lower chamber 20 even when the disk 57 is in contact with the valve seat portion 79.
- the disk 62 abuts against the disk 60 when the valve member 99 is deformed in the opening direction, and suppresses deformation of the valve member 99.
- the piston 18 includes, in order from the piston 18 side in the axial direction, one disk 111, one disk 112, a plurality of disks 113, a plurality of disks 114, A single disk 115, a single disk 116, and a single annular member 117 are stacked.
- the disks 111 to 116 and the annular member 117 are all made of metal.
- Each of the disks 111 to 116 and the annular member 117 has a perforated circular plate shape with a constant thickness.
- Each of the disks 111 to 116 and the annular member 117 can be fitted with the mounting shaft portion 28 of the piston rod 21 inside.
- the outer diameter of the disk 111 is smaller than the inner diameter of the valve seat portion 49 of the piston 18.
- the outer diameter of the disk 112 is slightly larger than the outer diameter of the valve seat portion 49 of the piston 18.
- the disc 112 can be seated on the valve seat portion 49.
- the disk 112 has a notch 121 formed on the outer peripheral side. The notch 121 crosses the valve seat portion 49 in the radial direction.
- the outer diameters of the plurality of disks 113 are the same as the outer diameter of the disk 112.
- Each of the plurality of disks 114 has a smaller outer diameter than the outer diameter of the disk 113.
- the outer diameter of the disk 115 is smaller than the outer diameter of the disk 114.
- the outer diameter of the disk 116 is larger than the outer diameter of the disk 114 and smaller than the outer diameter of the disk 113.
- the annular member 117 has an outer diameter that is smaller than the outer diameter of the disk 116.
- the annular member 117 is thicker and more rigid than the disks 111-116.
- the annular member 117 is in contact with the shaft step portion 29 of the piston rod 21.
- the disks 112 to 114 constitute a valve member 122 that is a disk valve.
- the valve member 122 can be detachably seated on the valve seat portion 49.
- the valve member 122 can open the passage portion in the passage hole 39 to the upper chamber 19 by separating from the valve seat portion 49.
- the valve member 122 suppresses the flow of oil between the upper chamber 19 and the lower chamber 20 via the passage portion in the passage hole 39.
- the valve member 122 and the valve seat part 49 constitute a contraction-side damping force generation mechanism 42.
- the notch 121 of the disk 112 constitutes a fixed orifice 123.
- the fixed orifice 123 allows the upper chamber 19 and the lower chamber 20 to communicate with each other even when the disk 112 is in contact with the valve seat portion 49.
- the disk 116 suppresses deformation beyond the regulation in the opening direction of the valve member 122.
- valve members 99 and 122 are not limited to this and may be any mechanism that generates a damping force.
- the valve members 99 and 122 may be, for example, lift type valves that bias the disc valve with a coil spring, or may be poppet valves.
- a damping force variable mechanism 43 is attached to the mounting shaft portion 28 of the piston rod 21 on the side opposite to the piston 18 of the damping force generation mechanism 105.
- the damping force variable mechanism 43 makes the damping force variable in response to the frequency of reciprocation of the piston 18 (hereinafter referred to as piston frequency).
- the damping force varying mechanism 43 includes, in order from the axial damping force generating mechanism 105 side, one case body 131 that contacts the disk 62, one disk 132, two disks 133, and one partition disk 134. And a plurality of discs 135 and a lid member 139.
- the case body 131, the disks 132, 133, and 135 and the lid member 139 are made of metal.
- Each of the disks 132, 133, 135 and the lid member 139 has a perforated circular flat plate shape with a constant thickness.
- the disks 132, 133, 135 and the lid member 139 can fit the mounting shaft portion 28 of the piston rod 21 on the inside.
- the case main body 131 has an annular shape, and the mounting shaft portion 28 of the piston rod 21 can be fitted inside.
- the case body 131 constitutes a box-shaped case 140 with the lid member 139. A part of the mounting shaft portion 28 of the piston rod 21 is disposed inside the case 140.
- the case body 131 has a perforated disk-shaped base 141, an inner cylindrical portion 142, a support portion 143, and an outer cylindrical portion 166.
- the inner cylindrical portion 142 is formed on the inner peripheral side of the base portion 141.
- the inner cylindrical portion 142 has a cylindrical shape along the thickness direction of the base portion 141.
- the support portion 143 is formed on the outer peripheral side of the inner cylindrical portion 142 of the base portion 141.
- the support part 143 has a cylindrical shape along the thickness direction of the base part 141.
- the outer cylindrical portion 166 is formed on the outer peripheral side with respect to the support portion 143 of the base portion 141.
- the outer cylindrical portion 166 has a cylindrical shape along the thickness direction of the base portion 141.
- the inner cylindrical portion 142 protrudes from the base portion 141 on both sides in the axial direction.
- the support portion 143 protrudes from the base portion 141 only on one side in the axial direction.
- the outer cylindrical portion 166 protrudes from the base 141 only on the same side as the support portion 143.
- a small-diameter hole 145 and a large-diameter hole 146 are formed inside the inner cylindrical portion 142.
- the small-diameter hole portion 145 is formed on the side opposite to the protruding direction of the support portion 143 in the axial direction of the inner cylindrical portion 142.
- the small diameter hole portion 145 fits the mounting shaft portion 28 of the piston rod 21.
- the large diameter hole portion 146 is formed on the support portion 143 side in the axial direction of the inner cylindrical portion 142.
- the large diameter hole 146 has a larger diameter than the small diameter hole 145.
- the lid member 139 is fitted to the outer cylindrical portion 166 of the case main body 131.
- the lid member 139 forms a cylindrical case 140 with the case main body 131.
- the mounting shaft portion 28 penetrates in the radial center of the case 140 in the axial direction. A part of the attachment shaft portion 28 is disposed in the case main body 131.
- a disk 132, a disk 133, a partition disk 134, and a disk 135 are arranged in the case 140. The disk 132, the disk 133, the partition disk 134, and the disk 135 penetrate the attachment shaft portion 28 inside.
- the inner cylindrical portion 142 of the case body 131 supports the inner peripheral side of the disk 62 at one end portion on the small diameter hole portion 145 side in the axial direction.
- the inner cylindrical portion 142 supports the inner peripheral side of the disk 132 at the other end portion on the large-diameter hole portion 146 side in the axial direction.
- the support portion 143 of the case body 131 supports the outer peripheral side of the annular partition disk 134 at the end portion on the protruding tip side. Further, the support portion 143 is partially formed with a notch 203 in the circumferential direction. By the notch 203, the radially inner side and the radially outer side of the support portion 143 in the case body 131 are always in communication.
- the disk 132 has an outer diameter that is larger than the portion of the inner cylindrical portion 142 that contacts the inner cylindrical portion 142 and smaller than the inner diameter of the support portion 143.
- a notch 151 is formed in the disk 132.
- the notch 151 extends radially outward from the inner peripheral edge of the disc 132 that fits into the mounting shaft portion 28 of the piston rod 21.
- the notch 151 crosses the contact portion of the inner cylindrical portion 142 with the disk 132 in the radial direction.
- Each of the two disks 133 has a smaller outer diameter than the outer diameter of the disk 132.
- the partition disk 134 includes a disk 155 (disk valve) made of a metal material and an elastic member 156 made of a rubber material.
- the disk 155 is a perforated circular flat plate having a constant thickness and can be bent.
- the elastic member 156 is fixed to the outer peripheral side of the disk 155.
- the partition disk 134 has an annular shape as a whole, and is elastically deformable, that is, bendable.
- the disk 155 is provided so as to close the opening of the cylindrical case body 131.
- the annular disk 155 has an inner diameter that allows the disk 133 to be disposed on the inner side with a gap in the radial direction.
- the thickness of the disk 155 is thinner than the thickness of the two disks 133.
- the outer diameter of the disk 155 is larger than the outer diameter of the support portion 143 of the case body 131 and smaller than the inner diameter of the outer cylindrical portion 166.
- the disk 155 is also disposed in the case 140 with the attachment shaft portion 28 penetrating inward.
- the elastic member 156 is fixed to the outer peripheral side of the disk 155 in an annular shape. The entire surface of the elastic member 156 facing the disk 155 is fixed to the disk 155.
- the elastic member 156 has a seal portion 158 and a stopper portion 159 (elastic portion).
- the seal portion 158 is annular and is provided on the outer peripheral side of the disk 155.
- the seal portion 158 is provided on one surface side of the disk 155 in the axial direction.
- the seal portion 158 protrudes from the disk 155 to the side opposite to the axial lid member 139.
- the stopper portion 159 protrudes from the disk 155 toward the lid member 139 in the axial direction.
- the elastic member 156 has the seal portion 158 on the outer peripheral side of one surface 181 in the axial direction (thickness direction) of the disk 155.
- the elastic member 156 has a stopper portion 159 on the outer peripheral side of the other surface 182 in the axial direction (thickness direction) of the disk 155.
- the disk 155 is provided with a seal portion 158 on the one surface 181 side and a stopper portion 159 on the other surface 182 side.
- the seal portion 158 is formed in an annular cylindrical shape that is continuous over the entire circumference of the disk 155.
- the seal portion 158 is fixed to the surface 181 of the disk 155 over the entire circumference.
- the seal portion 158 contacts the inner peripheral surface of the outer cylindrical portion 166 of the case body 131 over the entire circumference.
- the seal portion 158 seals between the case main body 131.
- the seal portion 158 always closes the space between the outer cylindrical portion 166.
- the stopper portion 159 contacts the lid member 139 when the partition disk 134 is deformed to the lid member 139 side. As a result, the partition disk 134 is prevented from further deformation.
- the stopper portion 159 is provided on the outer peripheral side of the surface 182.
- the stopper portion 159 is intermittently formed in the circumferential direction of the disk 155.
- the stopper portion 159 includes a plurality (specifically, three) stopper constituting portions 160. These stopper constituent portions 160 have an arc shape and are formed along the outer peripheral edge of the disk 155. In the stopper portion 159, these stopper constituent portions 160 are fixed to the surface 182 of the disk 155 at intervals in the circumferential direction of the disk 155. As a result, a disc exposed portion 161 through which the disc 155 is exposed is provided on the outer peripheral side of the surface 182 on which the stopper portion 159 of the disc 155 is provided.
- the disc exposed portion 161 is provided between the stopper constituting portion 160 and the stopper constituting portion 160 that are adjacent to each other in the circumferential direction of the disc 155.
- a plurality of disc exposure portions 161 (specifically, three locations) are provided at intervals in the circumferential direction of the disc 155.
- the disk exposed portion 161 crosses the stopper portion 159 in the radial direction. Therefore, the stopper 159 of the elastic member 156 is fixed to the surface 182 of the disk 155 partially in the circumferential direction.
- the plurality of stopper components 160 have the same circumferential length of the disk 155.
- the plurality of stopper components 160 are arranged at equal intervals in the circumferential direction of the disk 155.
- the plurality of disc exposed portions 161 have the same circumferential length of the disc 155.
- the plurality of disc exposed portions 161 are arranged at equal intervals in the circumferential direction of the disc 155.
- the circumferential length of the disk 155 of the stopper component 160 is longer than the circumferential length of the disk 155 of the disk exposed portion 161.
- an annular gap is provided between the disk 155 and the outer cylindrical portion 166 of the case main body 131.
- a seal portion 158 and a stopper portion 159 are fixed to both surfaces of the disk 155 through this gap.
- the elastic member 156 is fixedly provided on both surfaces of the disk 155 through a gap between the disk 155 and the outer cylindrical portion 166.
- the seal portion 158 and the stopper portion 159 are connected via a gap between the disk 155 and the outer cylindrical portion 166. Therefore, the elastic member 156 has an annular connecting portion 162 as shown in FIG.
- the connecting portion 162 covers the outer peripheral surface 183 of the disk 155 and connects the seal portion 158 and the plurality of stopper constituting portions 160.
- the outer peripheral surface 183 of the disk 155 has a circular shape that is continuous over the entire circumference.
- the connecting portion 162 has a constant radial thickness, and is fixed to the outer peripheral surface 183 over the entire circumference. As shown in FIG. 3, the connecting portion 162 is disposed between the disk 155 and the outer cylindrical portion 166.
- the elastic member 156 has a seal portion 158, a stopper portion 159, and a connecting portion 162 vulcanized and bonded to the disk 155.
- the mold used for this vulcanization bonding has a seal portion forming cavity, a connecting portion forming cavity, and a stopper component forming cavity.
- the seal portion forming cavity secures the seal portion 158 to the surface 181 of the disk 155 while forming the seal portion 158.
- the connecting portion forming cavity fixes the outer peripheral surface 183 of the disk 155 while forming the connecting portion 162.
- the stopper component forming cavity is fixed to the surface 182 of the disk 155 while forming a plurality of stopper components 160.
- the portion between the adjacent stopper component forming cavities and the stopper component forming cavities is a disk contact portion.
- the disk contact portion contacts the disk 155 in order to form the disk exposed portion 161. Therefore, when the elastic member 156 is formed on the disk 155, the mold has a plurality (specifically, three locations) of a plurality (specifically, three locations) of the circumferential direction on the outer peripheral side of the disk 155 (specifically, a plurality of specific locations). In other words, three equally spaced positions are supported.
- the rubber material flows in a molten state as indicated by an arrow Z in FIG. 6 with respect to the disk 155 disposed in the mold.
- the rubber material is introduced into the mold so as to flow from the seal portion forming cavity forming the seal portion 158 through the connecting portion forming cavity forming the connecting portion 162 to the stopper component forming cavity forming the stopper portion 159. Will be.
- the flow path is narrowed by the connecting portion forming cavity. Therefore, a differential pressure is generated on the disk 155 between the seal portion forming cavity side and the stopper component forming cavity side.
- the mold supports the surface on the stopper component forming cavity side, which is the low pressure side of the disk 155, with a plurality of disk abutting portions. For this reason, even if the above differential pressure occurs, the deformation of the disk 155 is suppressed.
- the inner diameter of the seal portion 158 is larger than the outer diameter of the support portion 143 at the end on the disk 155 side. That is, the seal portion 158 has a minimum inner diameter larger than the outer diameter of the support portion 143.
- the partition disk 134 is supported by the disk 155 contacting the support portion 143 of the case main body 131.
- the outer diameter of the disk 135 is larger than the inner diameter of the disk 155 of the partition disk 134.
- the partition disk 134 is arranged such that the inner peripheral side of the disk 155 is disposed between the disk 132 and the disk 135 and is in contact with and supported by the disk 135.
- the partition disk 134 is supported by the support portion 143 on the outer peripheral side of the disk 155 on one side in the axial direction.
- the disk 135 is a seat portion on which the partition disk 134 is seated.
- the partition disk 134 is movable on the inner circumference side of the disk 155 between the disk 132 and the disk 135 within the range of the axial length of the two disks 133.
- the partition disk 134 is provided with an annular elastic member 156 that seals between the case 140 and the outer peripheral side, which is the non-support side opposite to the support of the disk 155 by the disk 135.
- the elastic member 156 contacts the outer cylindrical portion 166 of the case 140.
- the partition disk 134 has a simple support structure in which the inner peripheral side is supported by the disk 135 only on one side without being clamped from both sides.
- the opposite side of the disk 155 in the radial direction with respect to the portion to which the seal portion 158 and the stopper portion 159 are fixed serves as a support point when the disk 155 is bent.
- the stopper portion 159 is composed of a plurality of stopper constituting portions 160 arranged at intervals in the circumferential direction.
- the support part 143 is provided with a notch 203. For this reason, even if the partition disk 134 abuts on the lid member 139 in the stopper portion 159 or the abutment portion 143 of the case main body 131 in the disk 155, the pressure receiving area on the side where the seal portion 158 of the disk 155 is provided. The pressure receiving area on the side where the stopper 159 of the disk 155 is provided is approximately the same.
- the lid member 139 has a perforated disk shape in which the mounting shaft portion 28 of the piston rod 21 can be fitted.
- the lid member 139 is fitted in the outer cylindrical portion 166 of the case main body 131.
- the lid member 139 is formed with a through hole 167 penetrating in the axial direction at a radially intermediate portion.
- the through hole 167 is formed on the outer side in the radial direction than the disk 135 in the lid member 139.
- the through hole 167 is formed radially inward from the contact portion of the stopper portion 159 that contacts the lid member 139 when the partition disk 134 is bent.
- the seal portion 158 of the partition disk 134 contacts the inner peripheral surface of the outer cylindrical portion 166 of the case body 131 over the entire circumference. Thereby, the seal portion 158 seals the gap between the partition disk 134 and the outer cylindrical portion 166. That is, the partition disk 134 is a packing valve. The seal portion 158 always seals the gap between the partition disk 134 and the outer cylindrical portion 166 even if the partition disk 134 is displaced and deformed within a range allowed in the case 140.
- the partition disk 134 has a seal portion 158 that contacts the outer cylindrical portion 166 over the entire circumference. As a result, the partition disk 134 is centered with respect to the case 140 as described above.
- the partition disk 134 partitions the inside of the case 140 into two chambers, a variable chamber 171 (chamber, case chamber) and a variable chamber 172 (chamber, case chamber).
- the variable chamber 171 and the variable chamber 172 are partitioned by the partition disk 134 having the disk 155 and the seal portion 158.
- the two variable chambers 171 and 172 are defined by the disk 155 and the seal portion 158 and provided in the case main body 131.
- the variable chamber 171 is between the partition disk 134 and the base 141 side of the case main body 131 and has a variable capacity.
- the variable chamber 172 is between the partition disk 134 and the lid member 139 and has a variable capacity.
- variable chambers 171 and 172 are defined by the partition disk 134 including the disk 155 and the elastic member 156 and provided in the case 140.
- the variable chamber 171 communicates with a passage portion between the large-diameter hole portion 146 of the case main body 131 and the mounting shaft portion 28 via a passage portion in the notch 151 of the disk 132.
- the variable chamber 172 communicates with the lower chamber 20 via a passage portion in the through hole 167 of the lid member 139.
- the passage groove 30 of the piston rod 21 has a large-diameter hole 202 of the piston 18, a notch 87 of the disk 51, a notch 91 of the disk 54, a large-diameter hole 76 of the pilot case 55, a case body. It faces the large-diameter hole 146 of 131 and the notch 151 of the disk 132.
- the passage portion in the notch 87 of the disc 51, the passage portion between the large diameter hole portion 202 of the piston 18 and the mounting shaft portion 28, the passage portion in the passage groove 30 of the piston rod 21, and the disc 54 The passage portion in the notch 91, the passage portion between the large diameter hole portion 76 of the pilot case 55 of the extension side damping force generation mechanism 41 and the mounting shaft portion 28, and the case main body 131 of the damping force variable mechanism 43 are large.
- the passage portion in the passage hole 37 of the piston 18, the pilot chamber 80, and the variable chamber via the passage portion between the diameter hole portion 146 and the mounting shaft portion 28 and the passage portion in the notch 151 of the disk 132. 171 always communicates.
- the passage portion in the through hole 167 of the lid member 139 constitutes a passage 107 (second passage).
- the passage 107 extends connecting the upper chamber 19 and the lower chamber 20. Therefore, variable chambers 171 and 172 that are at least part of the passage 107 are formed in the cylindrical case body 131.
- the passage 107 connects the upper chamber 19 and the lower chamber 20 through a route partially different from the passages 101 and 103.
- the partition disk 134 restricts the flow of the working fluid in the passage 107 caused by the disk 155 sliding in the inner cylinder 3 of the piston 18.
- the disk 155 is a disk valve.
- the passage 107 has the same passage portion in the passage hole 37 on the upper chamber 19 side as the passage 101.
- the passage 107 is provided in parallel with the passage 101 on the lower chamber 20 side of the passage portion in the passage hole 37. That is, in the passage 107, a passage portion in the notch 87 of the disk 51, a passage portion between the large diameter hole portion 202 of the piston 18 and the mounting shaft portion 28, a passage portion in the passage groove 30 of the piston rod 21, and The passage portion between the large-diameter hole 146 of the case body 131 and the mounting shaft portion 28, the passage portion in the notch 151 of the disk 132, the variable chambers 171 and 172 in the case 140, and the penetration of the lid member 139
- the passage portion in the hole 167 is a parallel passage 109.
- the parallel passage 109 is in parallel with the passage connecting the passage portion 88 and the valve seat portion 47 and the damping valve 231 in the passage 101.
- the case 140 of the damping force variable mechanism 43 is provided in the parallel passage 109. Therefore, the case 140 is provided with two variable chambers 171 and 172 that are a part of the parallel passage 109, which are defined by the partition disk 134.
- the partition disk 134 can be displaced and deformed as long as the inner peripheral side moves between the disk 132 and the disk 135 and the outer peripheral side moves between the support portion 143 and the lid member 139.
- the shortest axial distance between the support portion 143 and the disk 135 is smaller than the axial thickness of the disk 155.
- the support part 143 supports the outer peripheral side of the disk 155 of the partition disk 134 from one side in the axial direction.
- the disk 135 supports the inner peripheral side of the disk 155 from the other side in the axial direction. Therefore, when the variable chambers 171 and 172 have the same pressure, the disk 155 presses the support portion 143 and the disk 135 with its own elastic force in a slightly deformed state.
- the partition disk 134 blocks the flow of oil between the variable chambers 171 and 172 of the parallel passage 109 when the inner peripheral side of the disk 155 contacts the disk 135 over the entire periphery.
- the partition disk 134 allows fluid to flow between the variable chamber 171 and the variable chamber 172, that is, the lower chamber 20 in a state where the inner peripheral side of the disk 155 is separated from the disk 135. Therefore, the inner peripheral side of the disk 155 of the partition disk 134 and the disk 135 as the seat portion constitute a check valve 245.
- the check valve 245 restricts the flow of oil from the variable chamber 171 to the lower chamber 20 in the parallel passage 109, while allowing the flow of oil from the lower chamber 20 to the variable chamber 171.
- the check valve 245 blocks the parallel passage 109 that allows the upper chamber 19 and the lower chamber 20 to communicate with each other via the passage portion in the passage hole 37 of the piston 18.
- the pressure on the upper chamber 19 side becomes lower than the pressure in the lower chamber 20.
- the check valve 245 brings the parallel passage 109 into a communicating state in this contraction stroke.
- the check valve 245 is the disc body of the partition disk 134.
- the check valve 245 is a free valve in which the entire partition disk 134 is movable in the axial direction.
- the partition disk 134 may be set so that the entire inner circumference of the disk 155 always contacts the disk 135 regardless of the pressure state of the variable chambers 171 and 172. In this way, the partition disk 134 may always block the flow between the variable chambers 171 and 172 of the parallel passage 109. In other words, the disk 155 of the partition disk 134 may block the flow of working fluid in at least one direction, including blocking the flow of working fluid in both directions between the variable chamber 171 and the variable chamber 172 of the passage 107.
- the piston rod 21 is inserted with the mounting shaft portion 28 inside thereof, and the annular member 117, the disk 116, the disk 115, the plurality of disks 114, the plurality of disks 113, the disk 112, the disk 111, the piston 18, disk 51, disk 211, disk 212, disk 213, pilot valve 52, disk 53, disk 54, pilot case 55, disk 56, disk 57, disk 58, disk 59, disk 60, disk 61, disk 62, case A main body 131, a disk 132, and a plurality of disks 133 are stacked on the shaft step portion 29 in this order.
- the pilot case 55 has the seal portion 86 of the pilot valve 52 fitted to the outer cylindrical portion 73.
- the partition disk 134 is overlaid on the support portion 143 of the case body 131 with the disk 133 inserted inside.
- the elastic member 156 of the partition disk 134 is fitted to the outer cylindrical portion 166 of the case main body 131.
- a plurality of disks 135 are overlaid on the disk 133 and the disk 155 of the partition disk 134 in a state where the mounting shaft portion 28 is inserted inside each of them.
- the lid member 139 is overlaid on the disk 135 with the mounting shaft portion 28 inserted inside.
- a plurality of disks 248 and an annular member 175 that is a common part with the annular member 117 are overlapped on the lid member 139 with the attachment shaft portion 28 inserted inward.
- the nut 176 is screwed to the male screw 31 of the mounting shaft portion 28 protruding from the annular member 175.
- the side or the whole is clamped in the axial direction by being sandwiched between the shaft step portion 29 and the nut 176 of the piston rod 21.
- the inner circumference side of the partition disk 134 is not clamped in the axial direction.
- the nut 176 is screwed to the male screw 31 of the mounting
- the contraction-side damping force generation mechanism 42, the piston 18, the extension-side damping force generation mechanism 41, the extension-side damping force generation mechanism 105, and the extension-side damping force variable mechanism 43 are The piston rod 21 is fastened to the piston rod 21 by a nut 176 in a state where the piston rod 21 is inserted on the inner peripheral side.
- the piston 18, the case main body 131, the disk 132, the plurality of disks 133, the plurality of disks 135, and the lid member 139 constituting the damping force varying mechanism 43 are inserted into the piston rod 21 on the inner peripheral side. In this state, the piston rod 21 is fastened by a nut 176.
- the damping force variable mechanism 43 can be assembled to the piston rod 21 in a state of being assembled in advance. In that case, a dummy rod is inserted instead of the piston rod 21, and the mounting shaft portion 28 of the piston rod 21 is inserted into the inner peripheral side of the damping force variable mechanism 43 while the rod is pulled out.
- the lid member 139 can be press-fitted and fixed to the outer cylindrical portion 166 of the case body 131.
- the base valve 25 described above is provided between the bottom member 12 of the outer cylinder 4 and the inner cylinder 3.
- the base valve 25 includes a base valve member 191, a disk 192, a disk 193, and a mounting pin 194.
- the base valve member 191 partitions the lower chamber 20 and the reservoir chamber 6.
- the disk 192 is provided below the base valve member 191, that is, on the reservoir chamber 6 side.
- the disk 193 is provided on the upper side of the base valve member 191, that is, on the lower chamber 20 side.
- the mounting pin 194 attaches the disk 192 and the disk 193 to the base valve member 191.
- the base valve member 191 has an annular shape, and a mounting pin 194 is inserted in the center in the radial direction.
- a plurality of passage holes 195 and a plurality of passage holes 196 are formed in the base valve member 191.
- the plurality of passage holes 195 allow the oil liquid to flow between the lower chamber 20 and the reservoir chamber 6.
- the plurality of passage holes 196 circulate the oil liquid between the lower chamber 20 and the reservoir chamber 6 outside the passage holes 195 in the radial direction.
- the disk 192 on the reservoir chamber 6 side allows oil to flow from the lower chamber 20 to the reservoir chamber 6 via the passage hole 195.
- the disk 192 suppresses the flow of oil through the passage hole 195 from the reservoir chamber 6 to the lower chamber 20.
- the disk 193 allows the oil liquid to flow from the reservoir chamber 6 to the lower chamber 20 via the passage hole 196.
- the disk 193 suppresses the flow of oil through the passage hole 196 from the lower chamber 20 to the reservoir chamber 6.
- the disk 192 and the base valve member 191 constitute a compression-side damping valve 197.
- the damping valve 197 is opened during the contraction stroke of the shock absorber 1 to flow oil from the lower chamber 20 to the reservoir chamber 6 and generate damping force.
- the disk 193 and the base valve member 191 constitute a suction valve 198.
- the suction valve 198 is opened during the expansion stroke of the shock absorber 1 and causes the oil liquid to flow from the reservoir chamber 6 into the lower chamber 20.
- the suction valve 198 allows the liquid to flow from the reservoir chamber 6 to the lower chamber 20 without substantially generating a damping force so as to compensate for the shortage of the liquid mainly caused by the extension of the piston rod 21 from the cylinder 2. Fulfill.
- the fluid from the upper chamber 19 opens the damping valve 231 of the damping force generation mechanism 41 that is the main valve from the passage portion in the passage hole 37, and the valve seats of the damping valve 231 and the piston 18. It flows into the lower chamber 20 through a passage 101 including a gap with the portion 47 and a passage portion 88.
- a damping force having a valve characteristic (a damping force is approximately proportional to the piston speed) is generated.
- the characteristic of the damping force with respect to the piston speed is a characteristic in which the increasing rate of the damping force decreases with an increase in the piston speed.
- the oil liquid from the upper chamber 19 flows into the lower chamber 20 through the passage 101 including the damping valve 231 and the valve seat portion 47 and the gaps of the damping force generating mechanism 41, While opening the valve member 99 of the damping force generation mechanism 105, which is a hard valve shown in FIG. 3, from the back pressure chamber inflow passage portion 235 and the pilot chamber 80, the back pressure chamber inflow passage portion 235, the pilot chamber 80, It flows into the lower chamber 20 through the passage 103 including the gap between the valve member 99 and the valve seat portion 79. This further suppresses the increase in damping force. For this reason, the characteristic of the damping force with respect to the piston speed is a characteristic in which the increasing rate of the damping force further decreases with an increase in the piston speed.
- the force (hydraulic pressure) acting on the pilot valve 52 is such that the force in the opening direction applied from the passage portion in the passage hole 37 is larger than the force in the closing direction applied from the pilot chamber 80. Therefore, in this region, the damping valve 231 of the damping force generation mechanism 41 opens away from the valve seat portion 47 of the piston 18 as the piston speed increases. As a result, the lower portion passing through the passage 103 including the passage portion in the passage hole 37, the back pressure chamber inflow passage portion 235, the pilot chamber 80, and the clearance between the valve member 99 and the valve seat portion 79 of the damping force generation mechanism 105. In addition to the flow to the chamber 20, the oil liquid is caused to flow to the lower chamber 20 through the passage 101 including the passage portion 88.
- the characteristic of the damping force with respect to the piston speed is a characteristic that the rate of increase of the damping force further decreases with an increase in the piston speed.
- the oil introduced into the passage portion in the passage hole 39 on the contraction side from the lower chamber 20 basically opens the valve member 122 of the damping force generation mechanism 42 and the valve member 122 and the valve. It flows into the upper chamber 19 through the space between the seat portion 49. At this time, a damping force having a valve characteristic (a damping force is approximately proportional to the piston speed) is generated. For this reason, the characteristic of the damping force with respect to the piston speed is a characteristic in which the increasing rate of the damping force decreases with an increase in the piston speed.
- variable damping force mechanism 43 makes the damping force variable according to the piston frequency even when the piston speed is the same.
- the partition disk 134 that has been in contact with the support part 143 and the disk 135 at the disk 155 is deformed so that the stopper part 159 approaches the lid member 139 and the volume of the variable chamber 171 is increased accordingly. To do. At the same time, the partition disk 134 discharges the oil from the variable chamber 172 that is a portion of the passage 107 on the lower chamber 20 side to the lower chamber 20 through the passage portion in the through hole 167 of the lid member 139.
- the partition disk 134 As the partition disk 134 is deformed in this way, the oil liquid is introduced into the variable chamber 171 from the upper chamber 19. As a result, the flow rate of the oil liquid flowing from the upper chamber 19 to the lower chamber 20 through the passage 101 is reduced while the damping force generation mechanism 41 is opened.
- the damping valve 231 of the damping force generation mechanism 41 can be easily opened. As a result, the damping force on the extension side becomes soft. At this time, the damping force generation mechanism 105, which is a hard valve, does not open.
- the partition disk 134 since the inner peripheral side of the partition disk 134 is separated from the disk 132 and is supported by the disk 135 from only one side, the inner peripheral side is easily deformed so as to approach the disk 132. Therefore, the partition disk 134 is easily deformed so that the stopper portion 159 on the outer peripheral side approaches the lid member 139.
- the pilot chamber 80 enters a state in which the opening of the damping valve 231 of the damping force generation mechanism 41 is suppressed. That is, the damping force generation mechanism 41 is in a state in which the damping valve 231 does not open and the oil liquid flows from the upper chamber 19 to the lower chamber 20 via the fixed orifice 216. As a result, the damping force on the extension side becomes hard.
- the oil liquid opens the valve member 99 of the damping force generation mechanism 105, which is a hard valve, and passes through the passage 103 including the gap between the valve member 99 and the valve seat portion 79 to lower the chamber. Will flow to 20.
- the oil liquid flows from the passage 101 to the lower chamber 20 by opening the damping valve 231 of the damping force generation mechanism 41 in addition to the flow through the passage 103. As described above, the damping force on the extension side when the piston frequency is low becomes hard.
- the damping force variable mechanism 43 during the contraction stroke, the pressure in the lower chamber 20 becomes higher, and the pressure in the variable chamber 172 becomes higher than the pressure in the variable chamber 171.
- the disk 155 of the partition disk 134 as the valve body of the check valve 245 is deformed with the support portion 143 of the case body 131 as a fulcrum, and is separated from the disk 135 as the valve seat of the check valve 245.
- the check valve 245 opens the passage 107 including the passage portion in the through hole 167 and allows the oil liquid to flow from the lower chamber 20 toward the upper chamber 19. At that time, the disc 155 is separated from the disc 135 so that there is no differential pressure, and further movement is suppressed.
- the above-described shock absorber of Patent Document 1 is provided with a damping force variable mechanism that varies the damping force in response to the frequency. In such a shock absorber, improvement in productivity is required.
- the shock absorber 1 of the first embodiment makes the damping force variable in response to the frequency.
- the shock absorber 1 has a part of the passage 107 formed in the case 140, and the variable chamber 171 and the variable chamber 172 are defined by the partition disk 134 in the case 140.
- the partition disk 134 includes a disk 155 and an elastic member 156.
- the elastic member 156 has a structure in which a seal portion 158 is fixed to one surface 181 side of the disk 155 and a stopper portion 159 is fixed to the other surface 182 side of the disk 155. As described above, when the elastic member 156 is fixed to the both surfaces 181 and 182 of the disk 155, there is a problem that the productivity of the partition disk 134 is not good.
- the disk 155 is disposed in the cavity of the mold, and the molten material (rubber material) of the elastic member 156 is injected into the cavity. At this time, if the molten material injection speed is high, the disk 155 is deformed by the differential pressure generated during the injection, and if the elastic member 156 is solidified in this state, the accuracy as a molded product may not be ensured. There is. Further, if the radial width of the connecting portion 162 is increased, the differential pressure generated in the disk 155 can be reduced even if the injection speed is increased, and deformation of the disk 155 can be suppressed.
- the molten material rubber material
- the shock absorber 1 of the first embodiment is configured such that the elastic member 156 is fixed to both surfaces of the disk 155 via an annular gap provided between the disk 155 and the case 140. . Then, with respect to the seal portion 158 fixed to the one surface 181 side of the disk 155, a stopper portion 159 fixed to the other surface 182 side and not requiring a sealing function is partially fixed in the circumferential direction. An exposed portion 161 is formed. Therefore, the portion that becomes the disc exposed portion 161 on the other surface 182 side of the disc 155 can be pressed by the mold. As a result, the deformation of the disk 155 can be suppressed even if a differential pressure occurs when the molten material for injecting the elastic member 156 is injected. Therefore, even if the material injection speed is increased, the accuracy of the molded product can be ensured. Therefore, the productivity of the partition disk 134 can be improved, and as a result, the productivity of the shock absorber 1 can be improved.
- the outer peripheral surface 183 of the disk 155 is not a circular shape that is continuous over the entire circumference as in the first embodiment.
- a notch 302 that is recessed radially inward from the outer peripheral surface 183 is formed in the outer peripheral edge 301 including the outer peripheral surface 183.
- the disc 155 is provided with a plurality of cutout portions 302 at the outer peripheral edge portion 301 which is the gap side with the outer cylindrical portion 166 of the case main body 131.
- a plurality of notches 302 are formed at equal intervals in the circumferential direction of the disk 155 (specifically, eight locations). The plurality of notches 302 penetrate the disk 155 in the axial direction.
- the connecting part 162 of the elastic member 156 of the second embodiment has a main body part 305 and a protruding part 306.
- the main body 305 is fixed to the outer peripheral surface 183 of the disk 155 and has an annular shape.
- the protruding portion 306 protrudes radially inward from the main body portion 305 and is fixed to the notch portion 302.
- the number of protrusions 306 is the same as the number of notches 302 (specifically, eight locations).
- the protruding portions 306 are arranged at equal intervals in the circumferential direction of the main body portion 305.
- the stopper portion 159 of the elastic member 156 of the second embodiment is continuous over the entire circumference in the circumferential direction of the disk 155 and has an annular shape.
- the disk exposed portion 161 of the first embodiment is not formed on the partition disk 134 of the second embodiment.
- An annular stopper 159 is fixed to the disk 155 over the entire circumference of the partition disk 134.
- a concave groove 308 is formed in the stopper portion 159 of the second embodiment on the side opposite to the axial disk 155. The concave groove 308 penetrates the stopper portion 159 in the radial direction.
- a plurality (specifically, three) of the concave grooves 308 are provided at equal intervals in the circumferential direction of the stopper portion 159.
- the rubber material constituting the elastic member 156 is in a molten state and passes through the connecting portion forming cavity from the seal portion forming cavity to form the stopper constituent portion. It will be introduced into the mold to flow into the cavity.
- the disc 155 has a plurality of notches 302 formed on the outer peripheral edge 301.
- the plurality of cutout portions 302 have a partially increased flow path cross-sectional area as shown in FIGS. 9A and 9B, and the rubber material can easily flow. As a result, the differential pressure between the seal portion forming cavity side of the disk 155 and the stopper component forming cavity side can be suppressed.
- the deformation of the disk 155 can be suppressed without supporting the outer peripheral side of the disk 155 with a mold. Therefore, even if the material injection speed is increased, the accuracy of the molded product can be ensured. Therefore, the productivity of the partition disk 134 can be improved. As a result, the productivity of the shock absorber 1 can be improved.
- the partition disk 134 of the second embodiment does not need to support the outer peripheral side of the disk 155 where the elastic member 156 is provided with a mold. For this reason, the partition disk 134 can be provided with a stopper portion 159 that is continuous over the entire circumference and fixed to the disk 155 over the entire circumference. Therefore, the strength of fixing the stopper portion 159 to the disk 155 can be increased.
- the disk 155 of the partition disk 134 is partially different from the first embodiment. That is, in the third embodiment, as shown in FIGS. 10 and 11, a plurality (specifically, three locations) of concave portions 321 having the same shape and a plurality (specifically three) are provided on the surface 182 side of the disk 155. And a convex portion 322 of the same shape.
- the concave portion 321 has a substantially rectangular shape when viewed along the axial direction of the disk 155, and the convex portion 322 also has a substantially rectangular shape when viewed along the axial direction of the disk 155.
- a surface 182 of the disk 155 is a flat surface, and is a surface to which the stopper portion 159 is fixed.
- the plurality of concave portions 321 are formed to be recessed in the axial direction (thickness direction) from the flat surface 182 on the inner peripheral side opposite to the outer peripheral side where the elastic member 156 is provided in the radial direction of the disk 155.
- the plurality of convex portions 322 are formed to protrude from the surface 182 in the axial direction (thickness direction) on the inner peripheral side opposite to the outer peripheral side where the elastic member 156 is provided in the radial direction of the disk 155.
- the concave portion 321 and the convex portion 322 formed on the surface 182 side of the disk 155 are located on the radially inner peripheral side from the position where the stopper portion 159 of the disk 155 is fixed.
- the concave portion 321 and the convex portion 322 formed on the surface 182 side of the disk 155 are separated from the stopper portion 159.
- the concave portion 321 and the convex portion 322 formed on the surface 182 side of the disk 155 are disposed at a position equidistant from the center of the disk 155.
- the concave portions 321 and the convex portions 322 formed on the surface 182 side of the disk 155 are alternately arranged at equal intervals in the circumferential direction of the disk 155.
- the concave portions 321 and the convex portions 322 are alternately formed in the circumferential direction on the side opposite to the outer peripheral side that is the gap side with the outer cylindrical portion 166 of the case body 131.
- a concave portion 321 formed on the surface 182 side of the disk 155 matches the position of the partition disk 134 in the circumferential direction with the disk exposed portion 161.
- the convex portion 322 formed on the surface 182 side of the disk 155 matches the position of the partition disk 134 in the circumferential direction with the stopper component 160.
- the concave portions 321 and the convex portions 322 formed on the surface 182 side of the disk 155 are equally arranged in the circumferential direction of the disk 155.
- the surface 181 is a flat surface and is a surface to which the seal portion 158 is fixed.
- the back side of the convex portion 322 protruding from the surface 182 to which the stopper portion 159 is fixed is a concave portion 321 recessed from the flat surface 181.
- the recess 321 has the same shape as the recess 321 recessed from the surface 182 shown in FIG. 12B.
- the back side of the recess 321 that is recessed from the surface 182 is a protrusion 322 that protrudes from the surface 181.
- the convex portion 322 has the same shape as the convex portion 322 protruding from the surface 182 shown in FIG. 12A.
- the concave portion 321 and the convex portion 322 formed on the surface 181 side of the disk 155 are located on the radially inner peripheral side from the position where the seal portion 158 of the disk 155 is fixed.
- the concave portion 321 and the convex portion 322 formed on the surface 181 side of the disk 155 are separated from the seal portion 158.
- the concave portions 321 and the convex portions 322 formed on the surface 181 side of the disk 155 are also arranged at equal intervals from the center of the disk 155 at equal intervals in the circumferential direction of the disk 155.
- the concave portions 321 and the convex portions 322 are alternately formed in the circumferential direction on the side opposite to the outer peripheral side which is the gap side with the outer cylindrical portion 166 of the case body 131. ing.
- the concave portion 321 formed on the surface 181 side of the disk 155 matches the position of the partition disk 134 in the circumferential direction with the stopper component 160.
- the convex portion 322 formed on the surface 181 side of the disk 155 matches the position of the partition disk 134 in the circumferential direction with the disk exposed portion 161.
- the concave portions 321 and the convex portions 322 formed on the surface 181 side of the disk 155 are equally arranged in the circumferential direction of the disk 155.
- the circumferential lengths of the respective discs 155 of the concave portion 321 and the convex portion 322 are the surfaces 181 and 182 between the concave portion 321 and the convex portion 322 adjacent in the circumferential direction. It is shorter than the length of the including flat part 325 in the circumferential direction. All the concave portions 321 and the convex portions 322 are formed on the inner side in the radial direction of the disk 155 than the elastic member 156. All the concave portions 321 and the convex portions 322 are formed on the outer side in the radial direction from the contact portion of the disc 155 with the disc 135 shown in FIG.
- the disk 155 has the same shape as the front and back. Disc 155 does not require front / back discrimination.
- the disk 155 has a recess 321 and a protrusion 322 formed therein. For this reason, the disk 155 has higher rigidity than the first embodiment in which these are not formed.
- the size and depth of the concave portion 321 and the size and height of the convex portion 322 are determined so that the two discs 155 before the elastic member 156 is provided have the concave portion 321 of the surface 182 of one disc 155. Even if the convex part 322 of the surface 181 of the other disk 155 is aligned with the convex part 322 of the surface 181 of the other disk 155 and aligned with the concave part 321 of the surface 181 of the other disk 155, they are opposed.
- the surfaces 181 and 182 are set so as to leave a gap, in other words, the opposing surfaces 181 and 182 are not overlapped with each other.
- the inner peripheral side of the disk 155 is the opposite side to the outer peripheral side, which is the gap side with the outer cylindrical portion 166 of the case body 131.
- concave portions 321 and convex portions 322 are alternately formed in the circumferential direction on the side opposite to the gap.
- the partition disk 134 is configured to fix the elastic member 156 to both surfaces 181 and 182 of the disk 155 by vulcanization adhesion. In the case of this configuration, it is necessary to apply an adhesive to both surfaces 181 and 182 of the disk 155 before placement in the mold. In order to apply the adhesive to both surfaces 181 and 182 of the disk 155, for example, it is necessary to apply the adhesive to one surface 181 and turn the disk 155 upside down to apply it to the other surface 182. For this reason, there is room for improvement in terms of productivity improvement.
- concave portions 321 and convex portions 322 are alternately formed on the disk 155 in the circumferential direction.
- the surface 181 or the surface 182 of one disk 155 and the surface 181 or the surface 182 of the other disk 155 can be in surface contact with each other on the outer peripheral side with respect to the concave portion 321 and the convex portion 322.
- the other disk 155 does not come into surface contact with the inner peripheral side beyond the convex portion 322 of one disk 155. Therefore, the surface contactable area between the disks 155 can be suppressed to a predetermined value or less.
- the adhesive can be applied to the disk 155 by soaking a plurality of disks 155 in a basket and dipping in the liquid of the adhesive, so-called dipping. Therefore, the sticking between the disks 155 can be suppressed. Therefore, the adhesive can be applied to the disk 155 by dipping. Therefore, the adhesive can be satisfactorily applied to both surfaces 181 and 182 of the disk 155 in a short time. Therefore, the productivity of the partition disk 134 can be improved. As a result, the productivity of the shock absorber 1 can be improved.
- the disk 155 is formed with a concave portion 321 and a convex portion 322. For this reason, the rigidity of the disk 155 is increased. Therefore, when the elastic member 156 is formed on the disk 155, the deformation of the disk 155 can be suppressed without supporting the outer peripheral side of the disk 155 with a mold.
- the second embodiment may be applied to the third embodiment. That is, the notch 302 is formed in the outer peripheral edge 301 of the disk 155 of the partition disk 134 of the third embodiment.
- a protruding portion 306 that enters the notch 302 is formed in the connecting portion 162 of the elastic member 156 of the partition disk 134 of the third embodiment.
- the stopper portion 159 is formed to be continuous over the entire circumference of the disk 155. You may do this.
- the partition disk 134 is partially different from the third embodiment. That is, in the fourth embodiment, as shown in FIGS. 13 and 14, the concave portion 321 and the convex portion 322 have an arc shape centered on the center of the disk 155.
- the concave portion 321 and the convex portion 322 are configured such that the circumferential length of each disk 155 is larger than the circumferential length of the flat portion 325 between the concave portion 321 and the convex portion 322 adjacent to each other in the circumferential direction. Is also getting longer.
- the fourth embodiment can also suppress sticking between the disks 155 before the elastic member 156 is formed. For this reason, the productivity of the partition disk 134 can be improved.
- the damping force variable mechanism 43 is partially different from the first embodiment.
- the case body 131 has a shape in which the outer cylindrical portion 166 and the inner cylindrical portion 142 of the first embodiment are eliminated.
- the case main body 131 of the fifth embodiment has a base portion 141, a support portion 143, a small diameter hole portion 145, a large diameter hole portion 146 and a notch 203.
- the lid member 139 has a flat bottom portion 401 and a cylindrical portion 402 having a cylindrical shape.
- the bottom 401 has a flat plate shape having a through hole 167.
- the cylindrical portion 402 extends in the axial direction from the outer peripheral edge portion of the bottom portion 401.
- the case main body 131 is fitted into the cylindrical portion 402 of the lid member 139, thereby forming the case 140.
- a large-diameter portion 405 is provided on the inner peripheral side of the cylindrical portion 402 of the lid member 139 on the side opposite to the bottom portion 401.
- a small diameter portion 406 having an inner diameter smaller than that of the large diameter portion 405 is provided on the bottom 401 side.
- a step portion 407 is formed between the large-diameter portion 405 and the small-diameter portion 406 so as to extend in the direction perpendicular to the axis.
- the partition disk 134 is also partially different from the first embodiment.
- an elastic member 156 is fixed to the inner peripheral side of a perforated disk-shaped disk 155.
- the outer peripheral side of the disk 155 is supported by a stepped portion 407 as a sheet portion of the lid member 139.
- the radial intermediate position of the disk 155 is supported by the support portion 143 of the case body 131. Note that the axial dimension between the stepped portion 407 and the support portion 143 is smaller than the thickness of the disk 155. Thereby, a set load is applied to the partition disk 134.
- an elastic member 156 is fixed to the inner peripheral side of the disk 155.
- an annular seal portion 158 is fixed to the inner peripheral side of one surface 181 of the disk 155.
- a stopper portion 159 is fixed to the inner peripheral side of the other surface 182 of the disk 155.
- an annular coupling portion 162 is fixed to the inner peripheral surface 185 of the disk 155.
- the partition disk 134 of the fifth embodiment also has the disk 155 penetrating the mounting shaft portion 28 inward.
- the disk 155 has a gap between it and the mounting shaft portion 28.
- the elastic member 156 is provided on the non-support side that is the gap side of the disk 155 with the piston rod 21.
- the elastic member 156 seals between the mounting shaft portion 28 and the sealing portion 158.
- the seal portion 158 and the stopper portion 159 are fixed to both surfaces of the disc 155 through an annular gap between the disc 155 and the mounting shaft portion 28.
- the elastic member 156 is fixedly provided on both surfaces of the disk 155 through a gap between the disk 155 and the mounting shaft portion 28.
- the stopper portion 159 is composed of a plurality of arc-shaped stopper constituent portions 160. These stopper constituent portions 160 are shaped along the inner peripheral edge of the disk 155.
- a disk exposing portion 161 shown in FIG. 2 is exposed between the stopper constituting portion 160 and the stopper constituting portion 160 adjacent to each other in the circumferential direction of the disc 155.
- the outer peripheral side of the disk 155 of the partition disk 134 and the stepped portion 407 of the case 140 constitute a check valve 245.
- the check valve 245 restricts the flow of oil from the variable chamber 171 to the lower chamber 20 in the parallel passage 109 of the passage 107, while allowing the flow of oil from the lower chamber 20 to the variable chamber 171.
- the portion that becomes the disk exposed portion 161 on the surface 182 side of the disk 155 can be pressed by the mold. For this reason, deformation of the disk 155 can be suppressed. Therefore, productivity can be improved as in the first embodiment.
- the second embodiment may be applied to the damping force variable mechanism 43 of the fifth embodiment. That is, a notch 302 that is recessed radially outward from the inner peripheral surface 185 is formed in the inner peripheral portion of the disk 155 of the partition disk 134 of the fifth embodiment.
- a protruding portion 306 that protrudes radially outward and enters the notch 302 is formed in the connecting portion 162 of the elastic member 156 of the partition disk 134 of the fifth embodiment.
- the stopper portion 159 is formed to be continuous over the entire circumference of the disk 155. You may do this.
- the third and fourth embodiments may be applied to the damping force variable mechanism 43 of the fifth embodiment. That is, the concave portions 321 and the convex portions 322 are alternately formed in the circumferential direction on the outer peripheral side of the disk 155 of the partition disk 134 of the fifth embodiment. You may do this.
- the disk 155 of the partition disk 134 is partially different from the first embodiment. That is, in the sixth embodiment, as shown in FIG. 17, on the surface 182 side of the disk 155, a plurality (specifically, four places) of concave portions 321 having the same shape and a plurality of (specifically, four places) are provided. A convex portion 322 having the same shape is formed.
- the concave portion 321 is circular when viewed along the axial direction of the disk 155, and the convex portion 322 is also circular when viewed along the axial direction of the disk 155.
- the surface 182 of the disk 155 is a flat surface, and is a surface to which the stopper portion 159 is fixed as shown in FIG. As shown in FIG.
- the plurality of concave portions 321 formed on the surface 182 side of the disk 155 are arranged in the axial direction (thickness direction) from the surface 182 on the outer peripheral side where the elastic member 156 in the radial direction of the disk 155 is provided. It is formed in a recess. As shown in FIG. 20, the plurality of convex portions 322 formed on the surface 182 side of the disk 155 are axially (thickness direction) from the surface 182 on the outer peripheral side where the elastic member 156 in the radial direction of the disk 155 is provided. Is formed to protrude.
- the concave portion 321 and the convex portion 322 formed on the surface 182 side of the disc 155 are provided at positions where the stopper portion 159 of the disc 155 is fixed.
- the recessed part 321 and the convex part 322 which were formed in the surface 182 side of the disk 155 all have overlapped with the stopper part 159.
- FIG. All of the concave portion 321 and the convex portion 322 formed on the surface 182 side of the disk 155 are embedded in the stopper portion 159.
- the concave portion 321 and the convex portion 322 formed on the surface 182 side of the disk 155 are arranged at positions equidistant from the center of the disk 155.
- the concave portions 321 and the convex portions 322 formed on the surface 182 side of the disk 155 are alternately arranged at equal intervals in the circumferential direction of the disk 155.
- concave portions 321 and convex portions 322 are alternately formed in the circumferential direction on the outer peripheral side, which is the gap side with the outer cylindrical portion 166 (see FIG. 3) of the case body 131.
- the concave portions 321 and the convex portions 322 formed on the surface 182 side of the disk 155 are equally arranged in the circumferential direction of the disk 155.
- the surface 181 is a flat surface and is a surface to which the seal portion 158 is fixed.
- the back side of the convex portion 322 protruding from the surface 182 to which the stopper portion 159 is fixed is a concave portion 321 recessed from the flat surface 181.
- the recess 321 has the same shape as the recess 321 recessed from the surface 182 shown in FIG.
- the back side of the recess 321 that is recessed from the surface 182 is a protrusion 322 that protrudes from the surface 181.
- the convex portion 322 has the same shape as the convex portion 322 protruding from the surface 182 shown in FIG.
- the concave portion 321 and the convex portion 322 formed on the surface 181 side of the disc 155 are provided at positions where the seal portion 158 of the disc 155 is fixed.
- the whole has overlapped with the seal part 158, respectively.
- All of the concave portion 321 and the convex portion 322 formed on the surface 181 side of the disk 155 are embedded in the seal portion 158.
- the concave portions 321 and the convex portions 322 formed on the surface 181 side of the disk 155 are also arranged at equal intervals from the center of the disk 155 at equal intervals in the circumferential direction of the disk 155.
- concave portions 321 and convex portions 322 are alternately formed in the circumferential direction on the outer peripheral side, which is the gap side with the outer cylindrical portion 166 (see FIG. 3) of the case body 131.
- the concave portions 321 and the convex portions 322 formed on the surface 181 side of the disk 155 are equally arranged in the circumferential direction of the disk 155.
- the respective diameters of the concave portion 321 and the convex portion 322 are larger than the circumferential length of the flat portion 325 including the surfaces 181 and 182 between the concave portion 321 and the convex portion 322 adjacent in the circumferential direction. Is also shorter.
- all the concave portions 321 and the convex portions 322 overlap the radial positions of the elastic member 156 and the disk 155. All the concave portions 321 and the convex portions 322 are formed on the outer side in the radial direction of the disc 155 than the contact portion of the disc 155 with the disc 135 (see FIG. 3).
- All the concave portions 321 and the convex portions 322 are formed on the outer side in the radial direction of the disk 155 with respect to the contact portion of the disk 155 with the support portion 143 (see FIG. 3).
- the disk 155 has the same shape as the front and back. Disc 155 does not require front / back discrimination.
- the disk 155 has a recess 321 and a protrusion 322. For this reason, the disk 155 has a higher rigidity on the outer peripheral side than the first embodiment in which these are not formed.
- the size and depth of the concave portion 321 and the size and height of the convex portion 322 are determined so that the two discs 155 before the elastic member 156 is provided have the concave portion 321 of the surface 182 of one disc 155. Even if the convex part 322 of the surface 181 of the other disk 155 is aligned with the convex part 322 of the surface 181 of the other disk 155 and aligned with the concave part 321 of the surface 181 of the other disk 155, they are opposed.
- the surfaces 181 and 182 are set so as to leave a gap, in other words, the opposing surfaces 181 and 182 are not overlapped with each other.
- the outer peripheral side of the disk 155 is a gap side with the outer cylindrical portion 166 (see FIG. 3) of the case main body 131.
- concave portions 321 and convex portions 322 are alternately formed in the circumferential direction on the gap side.
- the partition disk 134 is configured to fix the elastic member 156 to both surfaces 181 and 182 of the disk 155 by vulcanization adhesion.
- it is necessary to apply the adhesive to both surfaces 181 and 182 of the disk 155 for example, it is necessary to apply the adhesive to one surface 181 and turn the disk 155 upside down to apply it to the other surface 182. For this reason, there is room for improvement in terms of productivity improvement.
- concave portions 321 and convex portions 322 are alternately formed on the disk 155 in the circumferential direction. For this reason, the surface 181 or the surface 182 of one disk 155 and the surface 181 or the surface 182 of the other disk 155 can be brought into surface contact with each other on the outer peripheral side with respect to the concave portion 321 and the convex portion 322. However, the other disk 155 does not come into surface contact with the inner peripheral side beyond the convex portion 322 of one disk 155. In addition, since the concave portion 321 and the convex portion 322 are formed on the outer peripheral side of the disk 155, the area where the disks 155 can be brought into surface contact with each other can be made smaller than in the third embodiment.
- the adhesive can be applied to the disk 155 by soaking a plurality of disks 155 in a basket and dipping in the liquid of the adhesive, so-called dipping. Therefore, the sticking between the disks 155 can be suppressed. Therefore, the adhesive can be applied to the disk 155 by dipping. Therefore, the adhesive can be satisfactorily applied to both surfaces 181 and 182 of the disk 155 in a short time. Therefore, the productivity of the partition disk 134 can be improved. As a result, the productivity of the shock absorber 1 can be improved.
- the disk 155 has a concave portion 321 and a convex portion 322 formed on the outer peripheral side. For this reason, the rigidity on the outer peripheral side of the disk 155 is increased. Therefore, when the elastic member 156 is formed on the disk 155, the deformation of the disk 155 can be suppressed without supporting the outer peripheral side of the disk 155 with a mold. Furthermore, in the sixth embodiment, since the inner diameter of the stopper portion 159 and the inner diameter of the seal portion 158 are made substantially equal, it is supported inside the stopper portion 159, and the support on the outer peripheral side can be made unnecessary. . Therefore, as shown in FIG.
- the stopper portion 159 can be continuously formed in an annular shape over the entire circumference in the circumferential direction of the disk 155, so that the outer peripheral side of the disk 155 is not exposed, and the stopper portion 159. The risk of peeling off can be further reduced.
- the second embodiment may be applied to the sixth embodiment. That is, the notch 302 is formed in the outer peripheral edge 301 of the disk 155 of the partition disk 134 of the sixth embodiment.
- a protruding portion 306 that enters the notch 302 is formed in the connecting portion 162 of the elastic member 156 of the partition disk 134 of the sixth embodiment. You may do this.
- the disc 85 of the pilot valve 52 is partially different from the first embodiment. That is, in the seventh embodiment, as shown in FIG. 21, a plurality of concave portions 502 having the same shape are formed on the one surface 501 side of the disk 85. The plurality of concave portions 502 are shown in only one place in FIG. In the seventh embodiment, as shown in FIG. 22, a plurality of convex portions 503 having the same shape are formed on the one surface 501 side of the disk 85. The plurality of convex portions 503 are shown in only one place in FIG.
- the surface 501 is a flat surface and is a surface to which the seal portion 86 is fixed.
- the concave portion 502 is circular when viewed along the axial direction of the disk 85, and the convex portion 503 is also circular when viewed along the axial direction of the disk 85.
- a plurality of recesses 502 formed on the surface 501 side of the disk 85 are formed to be recessed in the axial direction (thickness direction) from the flat surface 501 on the outer peripheral side where the seal portion 86 in the radial direction of the disk 85 is provided. Yes.
- the plurality of convex portions 503 formed on the surface 501 side of the disk 85 are formed to protrude in the axial direction (thickness direction) from the surface 501 on the outer peripheral side where the seal portion 86 in the radial direction of the disk 85 is provided. .
- All the concave portions 502 and convex portions 503 formed on the surface 501 side of the disc 85 are provided at positions where the seal portion 86 of the disc 85 is fixed.
- the recessed part 502 and the convex part 503 which were formed in the surface 501 side of the disk 85 all have overlapped with the seal
- FIG. The concave portion 502 and the convex portion 503 formed on the surface 501 side of the disk 85 are all embedded in the seal portion 86.
- the concave portion 502 and the convex portion 503 formed on the surface 501 side of the disk 85 are disposed at a position equidistant from the center of the disk 85.
- the concave portions 502 and the convex portions 503 formed on the surface 501 side of the disk 85 are alternately arranged at equal intervals in the circumferential direction of the disk 85.
- the concave portions 502 and the convex portions 503 are alternately formed in the circumferential direction on the outer peripheral side that is the gap side with the outer cylindrical portion 73 of the pilot case 55.
- the concave portions 502 and the convex portions 503 formed on the surface 501 side of the disk 85 are equally arranged in the circumferential direction of the disk 85.
- the other surface 505 of the disk 85 is a flat surface and is a surface opposite to the surface 501 to which the seal portion 86 is fixed.
- the back side of the convex portion 503 protruding from the surface 501 to which the seal portion 86 is fixed is a concave portion 502 recessed from the surface 505 where the seal portion 86 is not provided.
- the recess 502 has the same shape as the recess 502 that is recessed from the surface 501 shown in FIG.
- the back side of the recess 502 that is recessed from the surface 501 is a protrusion 503 that protrudes from the surface 505.
- the convex portion 503 has the same shape as the convex portion 503 protruding from the surface 501 shown in FIG.
- the concave portions 502 and the convex portions 503 formed on the surface 505 side of the disk 85 are also arranged at equal intervals in the circumferential direction of the disk 85 at equal distances from the center of the disk 85.
- the recesses 502 and the projections 503 are alternately formed in the circumferential direction on the outer peripheral side that is the gap side with the outer cylindrical portion 73 of the pilot case 55.
- the concave portions 502 and the convex portions 503 formed on the surface 505 side of the disk 85 are equally arranged in the circumferential direction of the disk 85.
- all the concave portions 502 and the convex portions 503 overlap the radial positions of the seal portion 86 and the disk 85.
- two disks 511 are provided in place of the disk 213 (see FIG. 4) of the first embodiment.
- the disks 511 are all made of metal.
- Each of the disks 511 has a perforated disk shape with a constant thickness.
- Each of the disks 511 can fit the mounting shaft portion 28 of the piston rod 21 inside.
- the outer diameter of the disk 511 is smaller than the outer diameter of the disks 211 and 212.
- the outer diameter of the disk 511 is smaller than the diameter of the inscribed circle connecting the maximum outer diameter parts of the plurality of recesses 502 formed on the surface 505 side of the disk 85.
- the maximum outer diameter portion of each of the plurality of concave portions 502 is disposed on the surface portion 505.
- the outer diameter of the disk 511 is smaller than the diameter of the inscribed circle connecting the maximum outer diameter parts of the plurality of convex portions 503 formed on the surface 505 side of the disk 85.
- the maximum outer diameter portion of each of the plurality of convex portions 503 is disposed on the surface portion 505. All the concave portions 502 and the convex portions 503 are formed so as to be separated outward in the radial direction from the contact portion of the disc 85 with the disc 511.
- the disk 511 does not interfere with all the concave portions 502 and the convex portions 503.
- the total thickness of the two discs 511 is thicker than the height from the surface portion 505 of the convex portion 503 of the disc 85.
- the disc 85 of the seventh embodiment has the same shape as the front and back.
- the disc 85 does not require front / back discrimination.
- the disk 85 is formed with a recess 502 and a protrusion 503. For this reason, the disk 85 has higher rigidity on the outer peripheral side than the first embodiment in which these are not formed.
- the size and depth of the concave portion 502 and the size and height of the convex portion 503 are determined so that the two discs 85 before the sealing portion 86 is provided have the concave portion 502 on the surface 501 of one disc 85. Even if the convex portion 503 of the surface 505 of the other disc 85 is aligned with the convex portion 503 of the surface 505 of the other disc 85 and the concave portion 502 of the surface 505 of the other disc 85 is aligned and overlapped, they face each other. It is set so that the surfaces 501 and 505 leave a gap, in other words, the opposing surfaces 501 and 505 do not overlap each other.
- the outer peripheral side of the disk 85 is a gap side with the outer cylindrical portion 73 of the pilot case 55.
- concave portions 502 and convex portions 503 are alternately formed in the circumferential direction on the gap side.
- the pilot valve 52 is configured to fix the seal portion 86 made of an elastic member to the surface 501 of the disk 85 by vulcanization adhesion.
- it is necessary to apply an adhesive to the surface 501 of the disk 155 before placement in the mold.
- a manual application operation is required. For this reason, there is room for improvement in terms of productivity improvement.
- concave portions 502 and convex portions 503 are alternately formed in the circumferential direction on the disk 85. For this reason, the surface 501 or the surface 505 of one disk 85 and the surface 501 or the surface 505 of the other disk 85 can be in surface contact with each other on the outer peripheral side with respect to the concave portion 502 and the convex portion 503. However, the other disk 85 does not come into surface contact beyond the convex portion 503 of one disk 85 to the inner peripheral side. In addition, since the concave portion 502 and the convex portion 503 are formed on the outer peripheral side of the disk 85, the area where the disks 85 can be brought into surface contact with each other can be made smaller than a predetermined value.
- the disc 85 has a concave portion 502 and a convex portion 503 formed on the outer peripheral side. For this reason, the rigidity on the outer peripheral side of the disk 85 is increased.
- the piston main body 35 of the piston 18 is different from the seventh embodiment.
- the disk 511 of the seventh embodiment is not provided.
- the pilot valve 52 is the same as in the seventh embodiment.
- the outer diameter of the annular valve seat portion 47 connects the maximum outer diameter portions of the plurality of recesses 502 formed on the surface 505 side of the disk 85 of the pilot valve 52.
- the diameter is smaller than the diameter of the tangent circle.
- the outer diameter of the valve seat portion 47 is smaller than the diameter of the inscribed circle connecting the respective maximum outer diameter portions of the plurality of convex portions 503 formed on the surface 505 side of the disk 85.
- the outer diameter is smaller than the diameter of the inscribed circle connecting the respective maximum outer diameter portions of the plurality of recesses 502 formed on the surface 505 side of the disk 85 of the pilot valve 52. It has become.
- the outer diameters of the disks 211 and 212 are smaller than the diameter of the inscribed circle connecting the maximum outer diameter parts of the plurality of convex parts 503 formed on the surface 505 side of the disk 85. All the concave portions 502 and the convex portions 503 are formed so as to be separated outward in the radial direction from the contact portion of the disc 212 with the disc 85. All the concave portions 502 and the convex portions 503 are configured not to interfere with the disks 211 and 212 and the piston main body 35.
- the outer diameter of the valve seat portion 47 is smaller than that in the seventh embodiment. Therefore, the pressure receiving area of the damping valve 231 of the eighth embodiment is smaller than that of the damping valve 231 of the seventh embodiment. As a result, the damping force generation mechanism 41 including the damping valve 231 of the eighth embodiment is difficult to open. Therefore, the damping force generation mechanism 41 of the eighth embodiment opens when the piston speed becomes faster than the damping force generation mechanism 41 of the seventh embodiment. In other words, the damping force generation mechanism 41 of the seventh embodiment opens even if the piston speed is slower than the damping force generation mechanism 41 of the eighth embodiment.
- the disk 155 of the partition disk 134 is partially different from the sixth embodiment. Also in the ninth embodiment, as shown in FIG. 25, a plurality (specifically, four places) of concave portions 321 and a plurality (specifically, four places) of the same shape are provided on the surface 182 side of the disk 155.
- the convex portion 322 is formed.
- the concave portion 321 and the convex portion 322 formed on the surface 182 side of the disk 155 are also arranged at the same distance from the center of the disk 155.
- the concave portions 321 and the convex portions 322 formed on the surface 182 side of the disk 155 are alternately arranged at unequal intervals in the circumferential direction of the disk 155. In other words, the concave portions 321 and the convex portions 322 formed on the surface 182 side of the disk 155 are unevenly arranged in the circumferential direction of the disk 155.
- four concave portions 321 are arranged at an equal pitch of 90 degrees on the surface 182 side of the disk 155.
- the four concave portions 321 are sequentially defined as a first concave portion 321, a second concave portion 321, a third concave portion 321, and a fourth concave portion 321 in the circumferential direction of the disk 155.
- the four convex portions 322 are referred to as a first convex portion 322, a second convex portion 322, a third convex portion 322, and a fourth convex portion 322 in the circumferential direction of the disk 155.
- the distance between the adjacent concave portion 321 and the convex portion 322 is the closest between the first concave portion 321 and the first convex portion 322.
- the angle formed by the center of the first concave portion 321, the center of the disc 155, and the center of the first convex portion 322 is 15 degrees, which is the smallest.
- the angle formed by the center of the first protrusion 322, the center of the disk 155, and the center of the second recess 321 is 75 degrees.
- the angle formed by the center of the second recess 321, the center of the disk 155, and the center of the second protrusion 322 is the next smallest 20 degrees.
- the angle formed by the center of the second convex portion 322, the center of the disk 155, and the center of the third concave portion 321 is 70 degrees.
- the angle formed by the center of the fourth recess 321, the center of the disk 155, and the center of the fourth protrusion 322 is the next smallest 25 degrees.
- the angle formed by the center of the fourth protrusion 322, the center of the disk 155, and the center of the first recess 321 is 65 degrees.
- the angle formed by the center of the fourth recess 321, the center of the disk 155, and the center of the third protrusion 322 is the next smallest 30 degrees.
- the angle formed by the center of the third convex portion 322, the center of the disk 155, and the center of the third concave portion 321 is 60 degrees.
- the back side of the convex portion 322 protruding from the surface 182 to which the stopper portion 159 is fixed is a concave portion 321 recessed from the flat surface 181.
- the recess 321 has the same shape as the recess 321 recessed from the surface 182.
- the back side of the recess 321 that is recessed from the surface 182 is a protrusion 322 that protrudes from the surface 181.
- the convex portion 322 has the same shape as the convex portion 322 protruding from the surface 182.
- the concave portions 321 and the convex portions 322 formed on the surface 181 side of the disk 155 are also alternately arranged at unequal intervals in the circumferential direction of the disk 155.
- the concave portions 321 and the convex portions 322 formed on the surface 181 side of the disk 155 are also unevenly arranged in the circumferential direction of the disk 155.
- the circumferential rigidity of the disk 155 of the partition disk 134 becomes uneven. Therefore, the check valve 245 including the partition disk 134 does not expand at once, but gradually expands.
- the change of the partition disk 134 of the sixth embodiment to the disk 155 has been described.
- the disc 85 of the pilot valve 52 of the seventh embodiment may be changed in the same manner as in the ninth embodiment, and the concave portions 502 and the convex portions 503 may be unevenly arranged in the circumferential direction of the disc 85.
- the disk 155 of the partition disk 134 is partially different from the ninth embodiment.
- a plurality (specifically, five places) of concave portions 321 having the same shape and a plurality (specifically, five places) of convex portions 322 having the same shape are formed on the surface 182 side of the disk 155.
- the concave portion 321 and the convex portion 322 formed on the surface 182 side of the disk 155 are also arranged at the same distance from the center of the disk 155.
- the concave portions 321 and the convex portions 322 formed on the surface 182 side of the disk 155 are alternately arranged in the circumferential direction of the disk 155 partially at unequal intervals.
- the concave portions 321 and the convex portions 322 formed on the surface 182 side of the disk 155 are alternately arranged at equal intervals in the circumferential direction of the disk 155.
- the concave portions 321 and the convex portions 322 formed on the surface 182 side of the disk 155 are partially unevenly arranged in the circumferential direction of the disk 155.
- the concave portions 321 and the convex portions 322 formed on the surface 182 side of the disk 155 are partially evenly arranged in the circumferential direction of the disk 155.
- the five concave portions 321 are sequentially arranged in the circumferential direction of the disc 155 in the first concave portion 321, the second concave portion 321, the third concave portion 321, the fourth concave portion 321,
- the fifth recess 321 is assumed.
- the five convex portions 322 are sequentially arranged in the circumferential direction of the disk 155 in the first convex portion 322, the second convex portion 322, the third convex portion 322, the fourth convex portion 322, and the fifth convex portion 322. Let it be a convex portion 322.
- the 1st recessed part 321, the 1st convex part 322, the 2nd recessed part 321, the 2nd convex part 322, and the 3rd recessed part 321 are arrange
- the angle formed by the center of the third recess 321, the center of the disk 155, and the center of the third protrusion 322 is 30 degrees.
- the angle formed by the center of the third protrusion 322, the center of the disk 155, and the center of the fourth recess 321 is 45 degrees.
- the angle formed by the center of the fourth recess 321, the center of the disk 155, and the center of the fourth protrusion 322 is 60 degrees.
- the angle formed by the center of the fourth protrusion 322, the center of the disk 155, and the center of the fifth recess 321 is 60 degrees.
- the angle formed by the center of the fifth recess 321, the center of the disk 155, and the center of the fifth protrusion 322 is 45 degrees.
- the angle formed by the center of the fifth protrusion 322, the center of the disk 155, and the center of the first recess 321 is 30 degrees.
- the second concave portion 321 and the fourth convex portion 322 are disposed at a position of 180 degrees, and the remaining concave portions 321 and symmetric with respect to the line connecting these are provided.
- Convex part 322 is arranged.
- the back side of the convex portion 322 protruding from the surface 182 to which the stopper portion 159 is fixed is a concave portion 321 recessed from the flat surface 181.
- the recess 321 has the same shape as the recess 321 recessed from the surface 182.
- the back side of the recess 321 that is recessed from the surface 182 is a protrusion 322 that protrudes from the surface 181.
- the convex portion 322 has the same shape as the convex portion 322 protruding from the surface 182.
- the concave portions 321 and the convex portions 322 formed on the surface 181 side of the disk 155 are also arranged alternately at partial intervals in the circumferential direction of the disk 155.
- the concave portions 321 and the convex portions 322 formed on the surface 181 side of the disk 155 are alternately arranged at equal intervals in the circumferential direction of the disk 155.
- the concave portion 321 and the convex portion 322 formed on the surface 181 side of the disk 155 are partially unevenly arranged in the circumferential direction of the disk 155.
- the concave portions 321 and the convex portions 322 formed on the surface 181 side of the disk 155 are partially evenly arranged in the circumferential direction of the disk 155.
- the rigidity in the circumferential direction of the disk 155 of the partition disk 134 is partially uneven. Therefore, the check valve 245 including the partition disk 134 does not expand at once, but gradually expands.
- the change to the disk 155 of the partition disk 134 of the ninth embodiment has been described.
- the disc 85 of the pilot valve 52 of the seventh embodiment is changed in the same manner as in the tenth embodiment, and the concave portion 502 and the convex portion 503 are partially unevenly arranged in the circumferential direction of the disc 85, and partially You may arrange
- the disk 155 of the partition disk 134 is partially different from the ninth embodiment.
- the concave portions 321 and the convex portions 322 formed on the surface 182 side of the disk 155 are alternately arranged partially at unequal intervals in the circumferential direction of the disk 155.
- the concave portions 321 and the convex portions 322 formed on the surface 182 side of the disk 155 are alternately arranged at equal intervals in the circumferential direction of the disk 155.
- the concave portions 321 and the convex portions 322 formed on the surface 182 side of the disk 155 are partially unevenly arranged in the circumferential direction of the disk 155.
- the concave portions 321 and the convex portions 322 formed on the surface 182 side of the disk 155 are partially evenly arranged in the circumferential direction of the disk 155.
- the four recesses 321 are sequentially arranged in the circumferential direction of the disk 155 with the first recess 321, the second recess 321, the third recess 321, and the fourth recess 321.
- the four protrusions 322 are arranged in the circumferential direction of the disk 155 in the order of the first protrusion 322, the second protrusion 322, the third protrusion 322, and the fourth protrusion 322.
- the 1st recessed part 321, the 1st convex part 322, and the 2nd recessed part 321 are arrange
- the angle formed by the center of the second recess 321, the center of the disk 155, and the center of the second protrusion 322 is 60 degrees.
- the angle formed by the center of the second protrusion 322, the center of the disk 155, and the center of the third recess 321 is 40 degrees.
- the angle formed by the center of the third recess 321, the center of the disk 155, and the center of the third protrusion 322 is 50 degrees.
- the angle formed by the center of the third protrusion 322, the center of the disk 155, and the center of the fourth recess 321 is 50 degrees.
- the angle formed by the center of the fourth recess 321, the center of the disk 155, and the center of the fourth protrusion 322 is 40 degrees.
- the angle formed by the center of the fourth protrusion 322, the center of the disk 155, and the center of the first recess 321 is 60 degrees.
- the first convex portion 322 and the third convex portion 322 are arranged at a position of 180 degrees, and the remaining concave portion 321 is symmetrical with respect to the line connecting them. And the convex part 322 is arrange
- the back side of the convex portion 322 protruding from the surface 182 to which the stopper portion 159 is fixed is a concave portion 321 recessed from the flat surface 181.
- the recess 321 has the same shape as the recess 321 recessed from the surface 182.
- the back side of the recess 321 that is recessed from the surface 182 is a protrusion 322 that protrudes from the surface 181.
- the convex portion 322 has the same shape as the convex portion 322 protruding from the surface 182.
- the concave portions 321 and the convex portions 322 formed on the surface 181 side of the disk 155 are also alternately arranged partially at unequal intervals in the circumferential direction of the disk 155.
- the concave portions 321 and the convex portions 322 formed on the surface 181 side of the disk 155 are alternately arranged at equal intervals in the circumferential direction of the disk 155.
- the concave portion 321 and the convex portion 322 formed on the surface 181 side of the disk 155 are partially unevenly arranged in the circumferential direction of the disk 155.
- the concave portions 321 and the convex portions 322 formed on the surface 181 side of the disk 155 are partially evenly arranged in the circumferential direction of the disk 155.
- the circumferential rigidity of the disk 155 of the partition disk 134 is partially uneven. Therefore, the check valve 245 including the partition disk 134 does not expand at once, but gradually expands.
- the change to the disk 155 of the partition disk 134 of the ninth embodiment has been described.
- the disc 85 of the pilot valve 52 of the seventh embodiment may be changed in the same manner as in the eleventh embodiment, and the concave portion 502 and the convex portion 503 may be partially unevenly arranged in the circumferential direction of the disc 85.
- the present invention is not limited to this.
- the present invention may be applied to a monotube type hydraulic shock absorber in which the outer cylinder is eliminated and the gas chamber is formed by a partition body slidable on the side opposite to the upper chamber 19 of the lower chamber 20 in the cylinder 2.
- the present invention can be applied to any shock absorber including a pressure control valve using a packing valve having a structure in which a seal member is provided on a disk.
- the present invention can also be applied to the above-described contraction-side damping force generation mechanism 42.
- the present invention can also be applied to the base valve 25 described above.
- the present invention can also be applied to a case where an oil passage communicating with the inside of the cylinder 2 is provided outside the cylinder 2 and a damping force generating mechanism is provided in the oil passage.
- the hydraulic shock absorber was shown as an example, water and air can also be used as a fluid.
- the first aspect of the above-described embodiment includes a cylinder in which a working fluid is sealed, a piston slidably inserted into the cylinder, a piston rod connected to the piston, and a slide of the piston.
- a disc valve provided to restrict the flow of the working fluid generated by the movement and close the opening of the cylindrical case member; an annular seal portion provided on at least one side of the disc valve; and the disc And a chamber defined by the valve and the seal portion.
- the disc valve is formed with recesses and projections alternately. Thereby, productivity can be further improved.
- the second mode is a pilot chamber in which, in the first mode, the chamber applies a pressure in the valve closing direction to the disk valve.
- the opening of the disc valve is controlled by the pressure in the pilot chamber.
- a first passage through which a working fluid flows by the movement of the piston a second passage provided in parallel with the first passage, and a damping provided in the first passage.
- a damping force generating mechanism for generating force the case member in which at least a part of the second passage is formed; a shaft portion disposed in the case member; and the shaft portion penetrating inwardly.
- the seal member is disposed in the case member, the inner periphery side or the outer periphery side is supported, and the seal portion that seals between the case member or the shaft portion is provided on one surface side of the non-support side, and the other surface side
- the disc valve is provided with an elastic portion, and two case chambers in the case member defined by the disc valve and the seal portion are provided.
- the disk valve is provided to block the flow of the working fluid to at least one of the second passages.
- the concave portion and the convex portion are provided at positions where the seal portion of the disc valve is fixed.
- the concave portion and the convex portion are located on a radially inner peripheral side from a position where the seal portion of the disc valve is fixed.
- the concave portion and the convex portion are equally arranged in a circumferential direction of the disc valve.
- the concave portion and the convex portion are unevenly arranged in a circumferential direction of the disk valve.
- annular gap is provided between the disk valve and the case member or the shaft portion in the third aspect.
- the seal part and the elastic part are connected via the gap.
- a plurality of notches are provided on the gap side of the disc valve.
- the opposite side of the radial direction with respect to the portion of the disc valve to which the elastic portion is fixed serves as a support point when the disc valve is bent.
- a cylinder in which a working fluid is sealed, a piston that is slidably fitted in the cylinder, and divides the cylinder into two cylinder chambers, and one end side is connected to the piston.
- a piston rod whose other end extends to the outside of the cylinder, a first passage through which the working fluid flows from one of the cylinder chambers by the movement of the piston, a second passage provided in parallel with the first passage, A damping force generating mechanism that is provided in the first passage and generates a damping force; a cylindrical case member in which at least a part of the second passage is formed; and a shaft portion disposed in the case member;
- the annular portion is disposed inside the case member with the shaft portion penetrating inward, the inner circumferential side or the outer circumferential side is supported, and the non-supporting side is sealed between the case member or the shaft portion.
- annular disc deflectable sex members provided, and a two case chamber of the inner case member provided defined by said disk and said elastic member.
- the disc is provided to block the flow of the working fluid to at least one of the second passages.
- An annular gap is provided between the disk and the case member or the shaft portion.
- the elastic member is fixedly provided on both sides of the disc through the gap.
- the elastic member is provided with a seal part on one side of the disk and a stopper part on the other side.
- An elastic member is partially fixed to the other surface of the disk in the circumferential direction.
- a cylinder in which a working fluid is sealed, a piston that is slidably fitted in the cylinder, and divides the inside of the cylinder into two cylinder chambers, and one end side is connected to the piston.
- a piston rod whose other end extends to the outside of the cylinder, a first passage through which the working fluid flows from one of the cylinder chambers by the movement of the piston, a second passage provided in parallel with the first passage, A damping force generating mechanism that is provided in the first passage and generates a damping force; a cylindrical case member in which at least a part of the second passage is formed; and a shaft portion disposed in the case member; The annular portion is disposed inside the case member with the shaft portion penetrating inward, the inner circumferential side or the outer circumferential side is supported, and the non-supporting side is sealed between the case member or the shaft portion.
- annular disc deflectable sex members provided, and a two case chamber of the inner case member provided defined by said disk and said elastic member.
- the disc is provided to block the flow of the working fluid to at least one of the second passages.
- An annular gap is provided between the disk and the case member or the shaft portion.
- the elastic member is fixedly provided on both sides of the disc through the gap.
- the elastic member is provided with a seal part on one side of the disk and a stopper part on the other side. A plurality of notches are provided on the gap side of the disk. Thereby, productivity can be improved.
- concave portions and convex portions are alternately formed in the circumferential direction on the side opposite to the gap of the disk.
- shock absorber 2 cylinder 18 piston 19 upper chamber (one cylinder chamber, cylinder chamber) 20 Lower chamber (cylinder chamber) 21 Piston rod 28 Mounting shaft (shaft) 41 Damping force generation mechanism 55 Pilot case (case member) 80 Pilot room 85 disc (disc valve) 86 seal part 101 passage (first passage) 107 passage (second passage) 131 Case body (case member) 155 Disc (disc valve) 156 Elastic member 158 Seal part 159 Stopper part (elastic part) 171 Variable room (room, case room) 172 Variable room (room, case room) 181 One surface 182 The other surface 302 Notch 321, 502 Concavity 322, 503 Convex
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Abstract
Description
本願は、2017年3月10日に、日本に出願された特願2017-046272号に基づき優先権を主張し、その内容をここに援用する。
本発明に係る第1実施形態を図1~図6に基づいて説明する。なお、以下においては、説明の便宜上、図面における上側を「上」とし、図面における下側を「下」として説明する。
次に、第2実施形態を主に図7,図8,図9A,図9Bに基づいて第1実施形態との相違部分を中心に説明する。なお、第1実施形態と共通する部位については、同一称呼、同一の符号で表す。
次に、第3実施形態を主に図10,図11,図12A,図12Bに基づいて第1実施形態との相違部分を中心に説明する。なお、第1実施形態と共通する部位については、同一称呼、同一の符号で表す。
次に、第4実施形態を主に図13,図14に基づいて第3実施形態との相違部分を中心に説明する。なお、第3実施形態と共通する部位については、同一称呼、同一の符号で表す。
次に、第5実施形態を主に図15,図16に基づいて第1実施形態との相違部分を中心に説明する。なお、第1実施形態と共通する部位については、同一称呼、同一の符号で表す。
次に、第6実施形態を主に図17~図20に基づいて第2実施形態との相違部分を中心に説明する。なお、第2実施形態と共通する部位については、同一称呼、同一の符号で表す。
次に、第7実施形態を主に図21,図22に基づいて第1実施形態との相違部分を中心に説明する。なお、第1実施形態と共通する部位については、同一称呼、同一の符号で表す。
次に、第8実施形態を主に図23,図24に基づいて第7実施形態との相違部分を中心に説明する。なお、第7実施形態と共通する部位については、同一称呼、同一の符号で表す。
次に、第9実施形態を主に図25に基づいて第6実施形態との相違部分を中心に説明する。なお、第6実施形態と共通する部位については、同一称呼、同一の符号で表す。
次に、第10実施形態を主に図26に基づいて第9実施形態との相違部分を中心に説明する。なお、第9実施形態と共通する部位については、同一称呼、同一の符号で表す。
次に、第11実施形態を主に図27に基づいて第9実施形態との相違部分を中心に説明する。なお、第9実施形態と共通する部位については、同一称呼、同一の符号で表す。
2 シリンダ
18 ピストン
19 上室(一方のシリンダ室,シリンダ室)
20 下室(シリンダ室)
21 ピストンロッド
28 取付軸部(軸部)
41 減衰力発生機構
55 パイロットケース(ケース部材)
80 パイロット室(室)
85 ディスク(ディスクバルブ)
86 シール部
101 通路(第1通路)
107 通路(第2通路)
131 ケース本体(ケース部材)
155 ディスク(ディスクバルブ)
156 弾性部材
158 シール部
159 ストッパ部(弾性部)
171 可変室(室,ケース室)
172 可変室(室,ケース室)
181 一方の面
182 他方の面
302 切欠部
321,502 凹部
322,503 凸部
Claims (12)
- 作動流体が封入されたシリンダと、
該シリンダ内に摺動可能に挿入されたピストンと、
該ピストンに連結されたピストンロッドと、
前記ピストンの摺動によって生じる作動流体の流れを規制し、筒状のケース部材の開口部を閉鎖するように設けられたディスクバルブと、
該ディスクバルブの少なくとも一面側に設けられた環状のシール部と、
前記ディスクバルブおよび前記シール部によって区画される室と、
を備える緩衝器において、
前記ディスクバルブには、凹部と凸部とが交互に形成されることを特徴とする緩衝器。 - 前記室は前記ディスクバルブに閉弁方向の圧力を作用させるパイロット室であって、前記ディスクバルブは前記パイロット室の圧力によって開弁が制御されることを特徴とする請求項1に記載の緩衝器。
- 前記ピストンの移動により作動流体が流れる第1通路と、
前記第1通路と並列に設けられた第2通路と、
前記第1通路に設けられて減衰力を発生させる減衰力発生機構と、
内部に前記第2通路の少なくとも一部が形成される前記ケース部材と、
前記ケース部材内に配置される軸部と、
前記軸部を内側に貫通させて前記ケース部材内に配置され、内周側または外周側が支持され、非支持側の一面側に前記ケース部材との間または前記軸部との間をシールする前記シール部が設けられ、他面側に弾性部が設けられた前記ディスクバルブと、
前記ディスクバルブおよび前記シール部により画成されて設けられた前記ケース部材内の2つのケース室と、を有し、
前記ディスクバルブは前記第2通路の少なくとも一方への作動流体の流通を遮断するよう設けられていることを特徴とする請求項1に記載の緩衝器。 - 前記凹部および前記凸部は、前記ディスクバルブの前記シール部が固着される位置に設けられていることを特徴とする請求項1乃至3のいずれか一項に記載の緩衝器。
- 前記凹部および前記凸部は、前記ディスクバルブの前記シール部が固着される位置よりも径方向内周側に位置することを特徴とする請求項1乃至3のいずれか一項に記載の緩衝器。
- 前記凹部および前記凸部は、前記ディスクバルブの周方向に均等に配置されることを特徴とする請求項1乃至5のいずれか一項に記載の緩衝器。
- 前記凹部および前記凸部は、前記ディスクバルブの周方向に不均等に配置されることを特徴とする請求項1乃至5のいずれか一項に記載の緩衝器。
- 前記ディスクバルブの前記他面側には周方向部分的に前記弾性部が固着されていることを特徴とする請求項3に記載の緩衝器。
- 前記ディスクバルブと、前記ケース部材または前記軸部との間には、環状の隙間が設けられ、
前記シール部と前記弾性部とは、前記隙間を介して連結され、
前記ディスクバルブの前記隙間側には複数の切欠部が設けられていることを特徴とする請求項3に記載の緩衝器。 - 前記ディスクバルブのうち前記弾性部が固着される部分に対し径方向の反対側は、前記ディスクバルブが撓むときの支持点となることを特徴とする請求項3に記載の緩衝器。
- 作動流体が封入されるシリンダと、
前記シリンダ内に摺動可能に嵌装され、該シリンダ内を2つのシリンダ室に区画するピストンと、
一端側が前記ピストンに連結されると共に他端側が前記シリンダの外部に延出されるピストンロッドと、
前記ピストンの移動により一方の前記シリンダ室から作動流体が流れ出す第1通路と、
前記第1通路と並列に設けられる第2通路と、
前記第1通路に設けられて減衰力を発生させる減衰力発生機構と、
内部に前記第2通路の少なくとも一部が形成される筒状のケース部材と、
前記ケース部材内に配置される軸部と、
前記軸部を内側に貫通させて前記ケース部材内に配置され、内周側または外周側が支持され、非支持側に前記ケース部材との間または前記軸部との間をシールする環状の弾性部材が設けられた撓み可能な環状のディスクと、
前記ディスクおよび前記弾性部材により画成されて設けられた前記ケース部材内の2つのケース室と、を有し、
前記ディスクが前記第2通路の少なくとも一方への作動流体の流通を遮断するよう設けられ、
前記ディスクと、前記ケース部材または前記軸部との間には、環状の隙間が設けられ、 前記弾性部材は、前記隙間を介して前記ディスクの両面に固着されて設けられ、該ディスクの一方の面側にシール部が、他方の面側にストッパ部が設けられ、
前記ディスクの前記他方の面には周方向に部分的に弾性部材が固着されていることを特徴とする緩衝器。 - 作動流体が封入されるシリンダと、
前記シリンダ内に摺動可能に嵌装され、該シリンダ内を2つのシリンダ室に区画するピストンと、
一端側が前記ピストンに連結されると共に他端側が前記シリンダの外部に延出されるピストンロッドと、
前記ピストンの移動により一方の前記シリンダ室から作動流体が流れ出す第1通路と、
前記第1通路と並列に設けられる第2通路と、
前記第1通路に設けられて減衰力を発生させる減衰力発生機構と、
内部に前記第2通路の少なくとも一部が形成される筒状のケース部材と、
前記ケース部材内に配置される軸部と、
前記軸部を内側に貫通させて前記ケース部材内に配置され、内周側または外周側が支持され、非支持側に前記ケース部材との間または前記軸部との間をシールする環状の弾性部材が設けられた撓み可能な環状のディスクと、
前記ディスクおよび前記弾性部材により画成されて設けられた前記ケース部材内の2つのケース室と、を有し、
前記ディスクが前記第2通路の少なくとも一方への作動流体の流通を遮断するよう設けられ、
前記ディスクと、前記ケース部材または前記軸部との間には、環状の隙間が設けられ、
前記弾性部材は、前記隙間を介して前記ディスクの両面に固着されて設けられ、該ディスクの一方の面側にシール部が、他方の面側にストッパ部が設けられ、
前記ディスクの前記隙間側には複数の切欠部が設けられていることを特徴とする緩衝器。
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JP2021032383A (ja) * | 2019-08-28 | 2021-03-01 | 日立オートモティブシステムズ株式会社 | シリンダ装置の製造方法およびシリンダ装置 |
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CN117450207A (zh) * | 2023-11-13 | 2024-01-26 | 山东泰展机电科技股份有限公司 | 一种减震器底座阀门总成及具有其的减震器 |
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Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5365804B2 (ja) * | 2009-12-22 | 2013-12-11 | 日立オートモティブシステムズ株式会社 | 緩衝器 |
WO2015080056A1 (ja) * | 2013-11-29 | 2015-06-04 | 日立オートモティブシステムズ株式会社 | 緩衝器 |
JP2015145679A (ja) * | 2014-01-31 | 2015-08-13 | 日立オートモティブシステムズ株式会社 | シリンダ装置 |
JP2016050613A (ja) * | 2014-08-29 | 2016-04-11 | 日立オートモティブシステムズ株式会社 | 緩衝器 |
Family Cites Families (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL8500145A (nl) * | 1985-01-21 | 1986-08-18 | Koni Bv | Hydraulische tweepijpsschokdemper. |
JPH09133174A (ja) * | 1995-11-09 | 1997-05-20 | Nissan Motor Co Ltd | ショックアブソーバ |
JP4840557B2 (ja) * | 2005-04-12 | 2011-12-21 | 日立オートモティブシステムズ株式会社 | 減衰力調整式油圧緩衝器 |
KR101188247B1 (ko) | 2007-01-05 | 2012-10-05 | 주식회사 만도 | 변형 방지용 밸브디스크를 포함하는 쇽업소버 |
CN201496467U (zh) * | 2009-09-19 | 2010-06-02 | 宁波金恒汽车零部件有限公司 | 汽车减震器用阀座 |
US8746423B2 (en) | 2010-03-02 | 2014-06-10 | Hitachi Automotive Systems, Ltd. | Shock absorber |
JP5639865B2 (ja) | 2010-03-02 | 2014-12-10 | 日立オートモティブシステムズ株式会社 | 緩衝器 |
DE102010050868B4 (de) * | 2010-11-09 | 2013-09-26 | Gkn Sinter Metals Holding Gmbh | Herstellung mehrteiliger, gefügter Ventilbauteile in hydraulischen Anwendungen mit Fügedichtprofilen |
JP5796995B2 (ja) * | 2011-04-25 | 2015-10-21 | 日立オートモティブシステムズ株式会社 | 緩衝器 |
CN202048131U (zh) * | 2011-04-29 | 2011-11-23 | 芜湖艾科汽车技术有限公司 | 一种减振器复原阀 |
CN103770591B (zh) * | 2012-10-18 | 2016-01-13 | 广州汽车集团股份有限公司 | 车辆减振器的减振支架及车辆减振器 |
JP5993750B2 (ja) * | 2013-01-31 | 2016-09-14 | Kyb株式会社 | 緩衝器 |
CN103115105B (zh) * | 2013-03-08 | 2014-09-03 | 山东理工大学 | 减振器复原阀叠加阀片的拆分设计方法 |
JP2015194198A (ja) * | 2014-03-31 | 2015-11-05 | 日立オートモティブシステムズ株式会社 | 減衰力調整式緩衝器 |
JP6351443B2 (ja) * | 2014-08-29 | 2018-07-04 | 日立オートモティブシステムズ株式会社 | 緩衝器 |
JP6710914B2 (ja) | 2015-08-28 | 2020-06-17 | セイコーエプソン株式会社 | 電子デバイス、電子機器及び移動体 |
CN205573629U (zh) * | 2016-03-31 | 2016-09-14 | 上汽通用五菱汽车股份有限公司 | 一种提升刚度及减震的中间支承结构 |
-
2018
- 2018-03-07 CN CN201880014062.4A patent/CN110366647B/zh active Active
- 2018-03-07 JP JP2019504628A patent/JP6706714B2/ja active Active
- 2018-03-07 DE DE112018001265.4T patent/DE112018001265B4/de active Active
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Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5365804B2 (ja) * | 2009-12-22 | 2013-12-11 | 日立オートモティブシステムズ株式会社 | 緩衝器 |
WO2015080056A1 (ja) * | 2013-11-29 | 2015-06-04 | 日立オートモティブシステムズ株式会社 | 緩衝器 |
JP2015145679A (ja) * | 2014-01-31 | 2015-08-13 | 日立オートモティブシステムズ株式会社 | シリンダ装置 |
JP2016050613A (ja) * | 2014-08-29 | 2016-04-11 | 日立オートモティブシステムズ株式会社 | 緩衝器 |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2021032383A (ja) * | 2019-08-28 | 2021-03-01 | 日立オートモティブシステムズ株式会社 | シリンダ装置の製造方法およびシリンダ装置 |
JP7203703B2 (ja) | 2019-08-28 | 2023-01-13 | 日立Astemo株式会社 | シリンダ装置の製造方法およびシリンダ装置 |
WO2023013511A1 (ja) * | 2021-08-02 | 2023-02-09 | 日立Astemo株式会社 | シリンダ装置及び制御弁装置 |
CN117450207A (zh) * | 2023-11-13 | 2024-01-26 | 山东泰展机电科技股份有限公司 | 一种减震器底座阀门总成及具有其的减震器 |
CN117450207B (zh) * | 2023-11-13 | 2024-04-19 | 山东泰展机电科技股份有限公司 | 一种减震器底座阀门总成及具有其的减震器 |
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