Shock absorber, method for manufacturing shock absorber, valve, and method for manufacturing valve

Abstract

The shock absorber includes a cylinder, a piston provided in the cylinder, a rod having one end connected to the piston and the other end extending from the cylinder, and a body valve dividing the inside of the cylinder into two chambers. The body valve is provided with: a valve body having a working fluid passage; at least one disc-shaped valve member that opens and closes the working fluid passage; a restricting member provided on the opposite side of the valve member from the valve body and thicker than the valve member; and a pin member disposed on the inner periphery of the valve member and the restricting member, having a flange portion at one end and a caulking portion at the other end, and integrally aligning the valve body, the valve member, and the restricting member in the axial direction. The outer diameter of a facing portion of the pin member facing the restricting member is smaller than a portion of the pin member other than the facing portion in the axial direction.

Description

Technical Field

[0001] The present invention relates to a buffer, a method for manufacturing the buffer, a valve, and a method for manufacturing the valve.

[0002] This application claims priority based on Japanese application No. 2022-107764, filed on July 4, 2022, the contents of which are incorporated herein by reference. Background Art

[0003] There is a hydraulic shock absorber having the following structure, in which a pin member having a flange portion on one side is inserted through a valve body and a valve member and the other side of the pin member is caulked, thereby integrating the valve body and the valve member with the pin member (for example, refer to the following Patent Documents 1 and 2).

[0004] Prior art literature

[0005] Patent Literature

[0006] Patent Document 1: Japanese Patent No. 5397640

[0007] Patent Document 2: Japanese Patent No. 2642109 Summary of the invention

[0008] Technical problem to be solved by the invention

[0009] If the structure is a rivet pin component, it may not be possible to obtain stable damping force characteristics.

[0010] Therefore, an object of the present invention is to provide a shock absorber, a method for manufacturing the shock absorber, a valve, and a method for manufacturing the valve, which are capable of obtaining stable damping force characteristics.

[0011] Technical solutions for solving technical problems

[0012] In order to achieve the above-mentioned object, the present invention adopts the following schemes.

[0013] The buffer of the first embodiment of the present invention has:

[0014] Cylinder body;

[0015] A piston disposed in the cylinder;

[0016] a rod, one end of which is connected to the piston and the other end of which extends from the cylinder;

[0017] a body valve, which divides the cylinder body into two chambers;

[0018] The body valve comprises:

[0019] a valve body having a working fluid passage;

[0020] at least one disc-shaped valve member that opens and closes the working fluid passage;

[0021] a restricting member disposed on a side of the valve member opposite to the valve body and thicker than the valve member;

[0022] a pin member disposed on the inner periphery of the valve member and the limiting member, having a flange portion at one end and a rivet portion at the other end, so that the valve body, the valve member, and the limiting member are aligned and integrated in the axial direction;

[0023] The outer diameter of a portion of the pin member that faces the restriction member is smaller than a portion other than the facing portion in the axial direction of the pin member.

[0024] A second embodiment of the present invention is a method for manufacturing a buffer, the buffer comprising: a cylinder; a piston disposed in the cylinder; a body valve that divides the cylinder into two chambers; the body valve comprising: a valve body having a working fluid passage; at least one disc-shaped valve member that opens and closes the working fluid passage; a limiting member that is disposed on the side of the valve member opposite to the valve body and is thicker than the valve member; a pin member that is disposed on the inner periphery of the valve member and the limiting member, has a flange portion at one end and a rivet portion at the other end, so that the valve body, the valve member, and the limiting member are arranged in the axial direction and integrated;

[0025] The manufacturing method of the buffer is characterized by comprising:

[0026] a residual axial force applying step of applying a residual axial force to the valve body and the valve member;

[0027] A pressing step of pressing the limiting member toward the pin member;

[0028] The riveting step forms the riveted portion by riveting.

[0029] A third aspect of the present invention is a valve used in a buffer, characterized in that it comprises:

[0030] a valve body having a working fluid passage;

[0031] at least one disc-shaped valve member that opens and closes the working fluid passage;

[0032] a restricting member disposed on a side of the valve member opposite to the valve body and thicker than the valve member;

[0033] a pin member disposed on the inner periphery of the valve member and the limiting member, having a flange portion at one end and a rivet portion at the other end, so that the valve body, the valve member, and the limiting member are aligned and integrated in the axial direction;

[0034] A gap between the restricting member and the pin member is smaller than a gap between the valve body and the pin member.

[0035] A fourth aspect of the present invention is a method for manufacturing a valve, wherein the valve is used in a buffer and comprises: a valve body having a working fluid passage; at least one disc-shaped valve member that opens and closes the working fluid passage; a limiting member that is provided on the side of the valve member opposite to the valve body and is thicker than the valve member; a pin member that is arranged on the inner periphery of the valve member and the limiting member and has a flange portion at one end and a rivet portion at the other end, so that the valve body, the valve member, and the limiting member are arranged in the axial direction and integrated;

[0036] The method for manufacturing the valve is characterized by comprising:

[0037] a residual axial force applying step of applying a residual axial force to the valve body and the valve member;

[0038] A pressing step of pressing the limiting member toward the pin member;

[0039] The riveting step forms the riveted portion by riveting.

[0040] Effects of the Invention

[0041] According to the above-described aspects of the present invention, stable damping force characteristics can be obtained. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 1 is a cross-sectional view showing a shock absorber according to the first embodiment of the present invention. That is, it is a cross-sectional view when the shock absorber is viewed from a section including the center axis CL of the shock absorber. It should be noted that the reference symbol CL shown in each figure represents the center axis of the shock absorber.

[0043] Figure 2 1 is a diagram showing the body valve according to the first embodiment, and is a cross-sectional view when viewed along a section including the central axis CL.

[0044] Figure 3 It is a plan view showing a gasket before assembly of the body valve according to the first embodiment.

[0045] Figure 4 1 is a diagram showing a gasket before assembly of the body valve of the first embodiment. Figure 3 A-A section view.

[0046] Figure 5 It is a diagram showing a state after the shaft portion insertion step and before the clamping step in the method for manufacturing the shock absorber and the body valve according to the first embodiment, and is a cross-sectional view when viewed along a section including the central axis CL.

[0047] Figure 6 It is a diagram for explaining a clamping step, a residual axial force applying step, and a pressing step in the method for manufacturing the shock absorber and the body valve according to the first embodiment, and is a cross-sectional view when viewed along a section including the central axis CL.

[0048] Figure 7 The present invention shows a state after the pressing step and before the caulking step in the method for manufacturing the shock absorber and the body valve according to the first embodiment. Figure 6 A partial enlarged cross-sectional view of part B.

[0049] Figure 8 is a diagram showing the main part of the body valve of the first embodiment, Figure 7 The corresponding enlarged partial cross-sectional view.

[0050] Fig. 9 The diagrams are for explaining a clamping step, a residual axial force applying step, and a pressing step in Modification 1 of the method for manufacturing the shock absorber and the body valve of the first embodiment, and are cross-sectional views when viewed along a section including the central axis CL.

[0051] Fig.10 It is a side view showing a clamping member used in Modification 1 of the method for manufacturing the shock absorber and the body valve according to the first embodiment.

[0052] Fig.11 It is a plan view of a gasket before assembly, showing Modification 2 of the body valve of the first embodiment.

[0053] Fig.12 2 is a diagram showing a gasket before assembly, showing a second modification of the body valve of the first embodiment. Fig.11 C-C section view.

[0054] Fig.13 It is a plan view of a gasket before assembly, showing Modification 3 of the body valve of the first embodiment.

[0055] Fig.14 1 is a diagram showing a gasket before assembly in a third modification of the body valve of the first embodiment. Fig.13 D-D section view.

[0056] Fig.15 1 is a diagram showing a gasket before assembly of a modification 4 of the body valve of the first embodiment. Fig.14 The corresponding cross-sectional view.

[0057] Fig.16 It is a diagram showing a body valve of a shock absorber according to a second embodiment of the present invention, and is a cross-sectional view when viewed along a cross section including the central axis CL.

[0058] Fig.17 It is a diagram for explaining a residual axial force applying step and a pressing step in the method for manufacturing the shock absorber and the body valve according to the second embodiment, and is a cross-sectional view when viewed along a cross section including the central axis CL. DETAILED DESCRIPTION

[0059] [First embodiment]

[0060] Below, refer to Figure 1 to Figure 15 The first embodiment will be described. It should be noted that the portion denoted by the reference symbol CL in each drawing represents the central axis of the shock absorber. The same applies to the other embodiments and modified examples.

[0061] Figure 1 The shock absorber 11 of the first embodiment is shown. The shock absorber 11 is used in a suspension device of a vehicle such as an automobile or a railway vehicle. Specifically, the shock absorber 11 is used in a strut type suspension of an automobile. The shock absorber 11 includes a cylinder 17 having an inner tube 15 and an outer tube 16 .

[0062] The inner tube 15 is cylindrical. The outer tube 16 is a bottomed cylindrical tube. The outer tube 16 is larger in diameter than the inner tube 15 and is provided on the outer circumference of the inner tube 15. Thus, the buffer 11 is a multi-tube type buffer. A storage chamber 18 (chamber) is provided between the outer tube 16 and the inner tube 15.

[0063] The outer cylinder 16 is an integrally formed product composed of a single metal component. The outer cylinder 16 has a side wall portion 21 and a bottom portion 22. The side wall portion 21 is cylindrical. The bottom portion 22 is a disk-shaped portion that closes one end portion of the axial direction of the side wall portion 21. The side of the side wall portion 21 of the outer cylinder 16 opposite to the bottom portion 22 is an opening 23.

[0064] The buffer 11 includes a valve body 25 and a rod guide 26. The valve body 25 is annular and is provided at one axial end of the inner tube 15 and is placed on the bottom 22 of the outer tube 16. The rod guide 26 is annular and is provided at the ends of the inner tube 15 and the outer tube 16 on the opposite side of the valve body 25 in the axial direction.

[0065] The valve body 25 constitutes a body valve 30 (valve). The valve body 25 has a small outer diameter portion 31 and a large outer diameter portion 32 having a larger diameter than the small outer diameter portion 31. The rod guide 26 also has a small outer diameter portion 33 and a large outer diameter portion 34 having a larger diameter than the small outer diameter portion 33.

[0066] One end portion in the axial direction of the inner tube 15 is fitted in the small outer diameter portion 31 of the valve body 25. The inner tube 15 is placed on the bottom portion 22 of the outer tube 16 via the valve body 25. The other end portion in the axial direction of the inner tube 15 is fitted in the small outer diameter portion 33 of the rod guide 26. The large outer diameter portion 32 of the rod guide 26 is fitted in the side wall portion 21 of the outer tube 16. Thus, the inner tube 15 is fitted in the side wall portion 21 of the outer tube 16 via the rod guide 26. In this state, the inner tube 15 is positioned relative to the outer tube 16 in the radial direction.

[0067] The valve body 25 has a partition portion 36 and a leg portion 37 .

[0068] The partitioning portion 36 is in the shape of a perforated disk and includes a portion of the large outer diameter portion 32 on the small outer diameter portion 31 side in the axial direction and the small outer diameter portion 31 .

[0069] The leg portion 37 protrudes from the outer peripheral side of the dividing portion 36 along the axial direction of the dividing portion 36. The leg portion 37 is annular. A portion of the leg portion 37 is formed on the opposite side of the large-diameter outer diameter portion 32 in the axial direction to the small-diameter outer diameter portion 31. The leg portion 37 is formed with a passage groove 38 in the portion of the leg portion 37 on the opposite side of the dividing portion 36 in the axial direction. The passage groove 38 penetrates the leg portion 37 in the radial direction of the leg portion 37. The leg portion 37 is provided with a plurality of passage grooves 38 of the same shape at equal intervals in the circumferential direction thereof.

[0070] The leg portion 37 of the valve body 25 abuts against the bottom portion 22 of the outer tube 16. The valve body 25 and the bottom portion 22 of the outer tube 16 communicate with the inner tube 15 and the outer tube 16 via the passage groove 38. Thus, the storage chamber 18 is formed between the valve body 25 and the bottom portion 22, similarly to the storage chamber 18 between the inner tube 15 and the outer tube 16.

[0071] The buffer 11 includes a closing member 41. The closing member 41 is annular and is provided on the side of the rod guide 26 opposite to the bottom 22. The closing member 41 is fitted into the inner circumference of the side wall portion 21 of the outer tube 16. A locking portion 43 is formed at the end portion of the side wall portion 21 opposite to the bottom 22 in the axial direction. The locking portion 43 is formed by plastically deforming the cylindrical side wall portion 21 radially inward by a caulking process such as a crimping process. The closing member 41 is clamped by the locking portion 43 and the rod guide 26. The closing member 41 closes the opening 23 of the outer tube 16, and is specifically an oil seal.

[0072] The buffer 11 includes a piston 45. A sliding member 46 made of synthetic resin is attached to the outer periphery of the piston 45. The piston 45 is slidably provided in the inner tube 15 of the cylinder 17 via the sliding member 46. The piston 45 divides the inner tube 15 into two chambers, namely, a first chamber 48 and a second chamber 49 (chambers). The first chamber 48 is provided between the piston 45 and the rod guide 26 in the inner tube 15. The second chamber 49 is provided between the piston 45 and the valve body 25 in the inner tube 15. The second chamber 49 is divided relative to the storage chamber 18 by the valve body 25. In other words, the valve body 25 of the body valve 30 divides the cylinder 17 into two chambers, namely, the second chamber 49 and the storage chamber 18.

[0073] In the cylinder 17 , the first chamber 48 and the second chamber 49 are filled with oil L as a working fluid. In addition, in the cylinder 17 , the reservoir chamber 18 is filled with gas G and oil L as a working fluid.

[0074] The buffer 11 has a rod 50 .

[0075] The lever 50 has a main shaft portion 51 and a mounting shaft portion 52 .

[0076] The outer diameter of the attachment shaft portion 52 is smaller than the outer diameter of the main shaft portion 51. The attachment shaft portion 52 is provided at one end of the main shaft portion 51 in the axial direction.

[0077] The mounting shaft portion 52 at one axial end of the rod 50 is connected to the piston 45, and the main shaft portion 51 at the other axial side of the rod 50 extends from the outer tube 16 of the cylinder body 17 to the outside through the opening 23. In the rod 50, the piston 45 is connected to the mounting shaft portion 52 by a nut 53. The main shaft portion 51 of the rod 50 extends from the inner tube 15 and the outer tube 16 to the outside through the rod guide 26 and the sealing member 41. The main shaft portion 51 of the rod 50 is guided by the rod guide 26, and the rod 50 moves in the axial direction relative to the inner tube 15 and the outer tube 16 together with the piston 45. The sealing member 41 seals the opening 23 of the outer tube 16 and the rod 50, and restricts the oil L in the inner tube 15 and the gas G and oil L in the storage chamber 18 from leaking to the outside.

[0078] The piston 45 is formed with a passage 55 and a passage 56 penetrating in the axial direction. The passages 55 and 56 can connect the first chamber 48 and the second chamber 49. The passages 55 and 56 are passages through which the oil L flows.

[0079] The damper 11 has a disk valve 57 and a disk valve 58 .

[0080] The disk valve 57 is annular and is provided on the side of the piston 45 opposite to the bottom 22 in the axial direction. The disk valve 57 closes the passage 55 by abutting against the piston 45. The passage 55 is always open to the second chamber 49.

[0081] The disk valve 58 is annular and is provided on the bottom 22 side in the axial direction of the piston 45. The disk valve 58 closes the passage 56 by abutting against the piston 45. The passage 56 is always open to the first chamber 48.

[0082] The disk valves 57 and 58 are connected to the mounting shaft portion 52 of the rod 50 together with the piston 45 .

[0083] The direction in which the rod 50 increases the amount of entry into the inner tube 15 and the outer tube 16, that is, the cylinder 17, is the contraction side that shortens the entire length of the shock absorber 11. When the rod 50 moves to the contraction side, the piston 45 moves in the direction of contracting the second chamber 49, and the pressure of the second chamber 49 becomes higher than the pressure of the first chamber 48 by a predetermined value or more, the disc valve 57 opens the passage 55. As a result, the oil L in the second chamber 49 flows to the first chamber 48 via the passage 55. The disc valve 57 is a damping valve that generates a damping force at this time. A fixed orifice (not shown) is formed in at least one of the piston 45 and the disc valve 57. This fixed orifice allows the second chamber 49 and the first chamber 48 to communicate via the passage 55 even when the disc valve 57 closes the passage 55 to the maximum extent.

[0084] The direction in which the rod 50 increases the amount of protrusion from the inner tube 15 and the outer tube 16, that is, the cylinder 17, is the extension side that increases the total length of the shock absorber 11. When the rod 50 moves to the extension side, the piston 45 moves in the direction of contracting the first chamber 48, and the pressure of the first chamber 48 is higher than the pressure of the second chamber 49 by a predetermined value or more, the disc valve 58 opens the passage 56. As a result, the oil L in the first chamber 48 flows to the second chamber 49 via the passage 56. The disc valve 58 is a damping valve that generates a damping force at this time. A fixed orifice (not shown) is formed in at least one of the piston 45 and the disc valve 58. The fixed orifice allows the first chamber 48 and the second chamber 49 to communicate via the passage 56 even when the disc valve 58 closes the passage 56 to the maximum extent.

[0085] The valve body 25 has a passage 61 and a passage 62 (working fluid passage) at the position of the partition 36. The passages 61 and 62 penetrate the partition 36 in the axial direction of the partition 36. The passages 61 and 62 can connect the second chamber 49 and the reservoir 18. The oil L flows through the passages 61 and 62.

[0086] The body valve 30 includes a disk valve 65 , a disk valve 66 (valve member), and a pin member 68 .

[0087] The disk valve 65 is provided on the bottom portion 22 side in the axial direction of the valve body 25. The disk valve 65 has an annular shape, and closes the passage 61 by coming into contact with the valve body 25.

[0088] The disk valve 66 is provided on the side of the valve body 25 opposite to the bottom 22 in the axial direction. The disk valve 66 has an annular shape and closes the passage 62 by abutting against the valve body 25.

[0089] The pin member 68 connects the disk valves 65 and 66 and the valve body 25 to form an integral whole.

[0090] The body valve 30 composed of the valve body 25, the disk valves 65 and 66, and the pin member 68 divides the cylinder 17 into two chambers, namely, the second chamber 49 and the reservoir chamber 18. The passage 61 is always connected to the second chamber 49, and the passage 62 is always connected to the reservoir chamber 18.

[0091] In the shock absorber 11, when the rod 50 moves toward the contraction side and the piston 45 moves in the direction of contracting the second chamber 49, and the pressure of the second chamber 49 becomes higher than the pressure of the reservoir chamber 18 by a predetermined value or more, the disk valve 65 of the body valve 30 opens the passage 61. As a result, the oil L in the second chamber 49 flows into the reservoir chamber 18 via the passage 61. At this time, the disk valve 65 generates a damping force. The disk valve 65 is a damping valve.

[0092] In the shock absorber 11, when the rod 50 moves toward the extension side and the piston 45 moves in the direction of contracting the first chamber 48, and the pressure in the second chamber 49 drops to be lower than the pressure in the reservoir chamber 18, the disk valve 66 of the body valve 30 opens the passage 62. As a result, the oil L in the reservoir chamber 18 flows into the second chamber 49 via the passage 62. At this time, the disk valve 66 allows the oil L to flow from the reservoir chamber 18 into the second chamber 49 without substantially generating a damping force. The disk valve 66 is a suction valve.

[0093] The rod 50 has a locking member 71 fixed between the piston 45 and the rod guide 26. The rod 50 has a buffer member 72 provided between the locking member 71 and the rod guide 26. The buffer member 72 abuts against the locking member 71. When the rod 50 moves to a predetermined position on the extension side, the buffer member 72 abuts against the rod guide 26 to mitigate the impact.

[0094] The valve body 25 is made of metal. The valve body 25 is in the shape of a disk with a hole. Figure 2 The inner peripheral surface 81 shown is a cylindrical surface.

[0095] The partition portion 36 of the valve body 25 includes a main body portion 83 , a fixed seat portion 84 , an inner seat portion 85 , an outer seat portion 86 , a fixed seat portion 88 , and a seat portion 89 .

[0096] The main body 83 is in the shape of a disk having a hole. The main body 83 is provided with an axially intermediate portion of the inner peripheral surface 81 .

[0097] The fixed seat portion 84 , the inner seat portion 85 , and the outer seat portion 86 are all provided on the side of the main body portion 83 opposite to the leg portion 37 in the axial direction.

[0098] The fixing seat portion 84 is annular and surrounds the inner peripheral surface 81 on the radially outer side of the inner peripheral surface 81. The fixing seat portion 84 protrudes from the main body portion 83 to the side opposite to the leg portion 37 along the axial direction of the main body portion 83.

[0099] The inner seat portion 85 is annular and surrounds the fixed seat portion 84 on the radially outer side of the main body portion 83. The inner seat portion 85 is separated from the fixed seat portion 84 in the radial direction of the main body portion 83. The inner seat portion 85 protrudes from the main body portion 83 to the side opposite to the leg portion 37 along the axial direction of the main body portion 83.

[0100] The outer seat portion 86 is annularly shaped and surrounds the inner seat portion 85 on the radially outer side of the main body 83. The outer seat portion 86 is separated from the inner seat portion 85 in the radial direction of the main body 83. The outer seat portion 86 protrudes from the main body 83 to the side opposite to the leg portion 37 along the axial direction of the main body 83.

[0101] In the axial direction of the valve body 25 , the fixed seat portion 84 , the inner seat portion 85 , and the outer seat portion 86 are aligned in height with respect to the protruding front end surfaces.

[0102] The fixed seat portion 88 and the seat portion 89 are both provided on the opposite side of the main body portion 83 from the fixed seat portion 84 , the inner seat portion 85 , and the outer seat portion 86 in the axial direction.

[0103] The fixing seat portion 88 is annular and surrounds the inner peripheral surface 81 on the radially outer side of the inner peripheral surface 81. The fixing seat portion 88 protrudes from the main body portion 83 in the axial direction of the main body portion 83 to the side opposite to the fixing seat portion 84.

[0104] The seat portion 89 is annularly shaped and surrounds the fixed seat portion 88 on the radially outer side of the main body 83. The seat portion 89 is separated from the fixed seat portion 88 in the radial direction of the main body 83. The seat portion 89 protrudes from the main body 83 along the axial direction of the main body 83 to the side opposite to the inner seat portion 85.

[0105] In the axial direction of the valve body 25 , the height position of the protruding front end surface of the seat portion 89 is slightly higher than the height position of the protruding front end surface of the fixed seat portion 88 .

[0106] One end of the passage 61 opens between the fixed seat portion 84 and the inner seat portion 85, and the other end of the passage 61 opens between the fixed seat portion 88 and the seat portion 89. In the main body portion 83, a plurality of passages 61 are formed at equal intervals in the circumferential direction of the valve body 25.

[0107] One end of the passage 62 opens between the inner seat portion 85 and the outer seat portion 86, and the other end of the passage 62 opens between the seat portion 89 and the leg portion 37. In the main body portion 83, a plurality of passages 62 are formed at equal intervals in the circumferential direction of the valve body 25.

[0108] In the radial direction of the valve body 25 , the passage 61 is located between the inner peripheral surface 81 and the passage 62 .

[0109] The body valve 30 includes the disk valve 65 , the disk 101 , and the suppressor disk 102 in this order from the partition portion 36 side in the axial direction on the leg portion 37 side of the partition portion 36 .

[0110] The disk valve 65 is composed of a plurality of (specifically, two) disks 105 of the same shape. The disk 101, the suppression disk 102, and the plurality of disks 105 are all made of metal and are in the shape of a circular flat plate with holes, that is, a disk.

[0111] The outer diameter of the disk 105 is slightly larger than the outer diameter of the seat 89. The inner peripheral surface 121 of the disk 105 at the center in the radial direction is a cylindrical surface. The disk 105 closest to the partition 36 in the axial direction among the plurality of disks 105 of the disk valve 65 abuts against the fixed seat 88 and the seat 89. The disk valve 65 opens and closes the passage 61 by separating and abutting against the seat 89.

[0112] The outer diameter of the disk 101 is smaller than the outer diameter of the disk 105. The inner peripheral surface 122 of the disk 101 at the center in the radial direction is a cylindrical surface.

[0113] The outer diameter of the suppression disk 102 is larger than that of the disk 101 and slightly smaller than that of the disk 105. The inner peripheral surface 123 of the suppression disk 102 at the center in the radial direction is a cylindrical surface. The thickness of the suppression disk 102 is thicker than that of the disk 105. The rigidity of the suppression disk 102 is higher than that of the disk 105.

[0114] The body valve 30 has a disk valve 66, a disk 111, and a gasket 113 (restriction member) in order from the partition 36 side in the axial direction of the partition 36 on the opposite side from the leg 37. The disk valve 66 and the disk 111 are both made of metal and are in the shape of a circular flat plate with holes, i.e., a disk.

[0115] The outer diameter of the disk valve 66 is slightly larger than the outer diameter of the outer seat portion 86. The disk valve 66 is formed with a passage hole 130 that penetrates the disk valve 66 in the axial direction of the disk valve 66. The disk valve 66 has a plurality of passage holes 130 formed at equal intervals in the circumferential direction of the disk valve 66. The inner peripheral surface 131 of the disk valve 66 at the center in the radial direction is a cylindrical surface. The disk valve 66 abuts against the fixed seat portion 84, the inner seat portion 85, and the outer seat portion 86. In this state, the plurality of passage holes 130 of the disk valve 66 are arranged between the fixed seat portion 84 and the inner seat portion 85 in the radial direction of the disk valve 66. The disk valve 66 opens and closes the passage 62 by separating from and abutting against the outer seat portion 86.

[0116] The outer diameter of the disk 111 is smaller than the outer diameter of the disk valve 66. The inner peripheral surface 132 of the disk 111 at the center in the radial direction is a cylindrical surface.

[0117] The diameters of inner circumferential surface 81 of valve body 25 , inner circumferential surface 121 of disk 105 , inner circumferential surface 122 of disk 101 , inner circumferential surface 123 of suppression disk 102 , inner circumferential surface 131 of disk valve 66 , and inner circumferential surface 132 of disk 111 are equal.

[0118] Figure 3 and Figure 4 It means to Figure 2 The gasket 113a is shown in the state before the body valve 30 is assembled. The gasket 113a is plastically deformed when assembled to the body valve 30. Figure 2 Washer 113 is shown.

[0119] like Figure 3 As shown in FIG. 1 , the gasket 113a is a rectangular flat plate with a hole. The gasket 113a is made of metal. The inner peripheral surface 133a at the center of the gasket 113a is circular when viewed from the thickness direction of the gasket 113a. Figure 4 As shown, the inner peripheral surface 133a has a small diameter portion 141a, a large diameter portion 142a and a large diameter portion 143a.

[0120] The small diameter portion 141a is provided at the center of the inner peripheral surface 133a in the thickness direction of the gasket 113a. The small diameter portion 141a is a cylindrical surface. The central axis of the small diameter portion 141a is along the thickness direction of the gasket 113a. Figure 5 As shown, the diameter of the small diameter portion 141 a is equal to the diameter of the inner peripheral surface 81 of the valve body 25 .

[0121] like Figure 4 As shown, the large diameter portion 142a extends from one end portion of the small diameter portion 141a in the axial direction in a direction away from the small diameter portion 141a in the axial direction while increasing in diameter. The large diameter portion 142a is a tapered surface.

[0122] The large diameter portion 143a extends from the end portion of the small diameter portion 141a on the opposite side to the large diameter portion 142a in the axial direction in a direction away from the small diameter portion 141a in the axial direction while increasing in diameter. The large diameter portion 143a is a tapered surface.

[0123] The small diameter portion 141a and the large diameter portions 142a and 143a have the same central axis. The central axis is the central axis of the inner peripheral surface 133a. The inner peripheral surface 133a is located at the center of the gasket 113a in the radial direction. The central axis of the inner peripheral surface 133a is consistent with the central axis of the gasket 113a. The axial direction of the gasket 113a is consistent with the thickness direction of the gasket 113a. The small diameter portion 141a is located at the center of the gasket 113a in the axial direction.

[0124] The washer 113a has a small diameter portion 141a and large diameter portions 142a and 143a which are larger in diameter than the small diameter portion 141a and are provided at different positions in the axial direction of the washer 113a relative to the small diameter portion 141a on the inner periphery.

[0125] The washer 113a has a pressing surface 151a formed on the outer periphery. The pressing surface 151a is a plane extending perpendicularly to the radial direction of the washer 113a. Figure 3 As shown, a plurality of (specifically, four) pressing surfaces 151a of the same shape are formed at equal intervals in the circumferential direction. The four pressing surfaces 151a are at the same distance from the central axis of the gasket 113a. The pressing surfaces 151a adjacent to each other in the circumferential direction of the gasket 113a are perpendicular to each other.

[0126] The washer 113a is mirror-symmetrical in the axial direction. In other words, the washer 113a has the same shape even if it is turned over in the axial direction.

[0127] like Figure 5 As shown, the wall thickness of the gasket 113a is thicker than the wall thickness of the disk valve 66. That is, the gasket 113a is thicker than the disk valve 66. The rigidity of the gasket 113a is higher than the rigidity of the disk valve 66.

[0128] exist Figure 5 Indicated in Figure 2 The pin member 68 shown in FIG. 6 is a pin member 68a before riveting. The pin member 68a is plastically deformed by riveting to become Figure 2 The pin assembly 68 is shown.

[0129] like Figure 5 As shown, the pin member 68a includes a shaft portion 161a and a flange portion 162. The pin member 68a is made of metal.

[0130] The shaft portion 161 a has a cylindrical shape.

[0131] The outer peripheral surface 171a of the shaft portion 161a is a cylindrical surface.

[0132] The flange portion 162 extends from one axial end of the shaft portion 161a to the radially outer side of the shaft portion 161a. The outer peripheral surface of the flange portion 162 is a cylindrical surface. The end surface 165 of the flange portion 162 on the side where the shaft portion 161a extends in the axial direction is a plane extending perpendicularly to the central axis of the shaft portion 161a. The end surface 166 of the flange portion 162 on the side opposite to the end surface 165 in the axial direction is a plane parallel to the end surface 165.

[0133] In assembly Figure 2 In the body valve 30 shown in the figure and in the method for manufacturing the body valve 30 (in other words, in the method for manufacturing the shock absorber 11 ), the shaft portion inserting step is first performed.

[0134] In the shaft insertion process, Figure 5 As shown, the shaft portion 161a of the pin member 68a is sequentially inserted radially inward of the inner circumferential surface 123 of the suppression disk 102, the inner circumferential surface 122 of the disk 101, the inner circumferential surface 121 of each of the multi-piece disks 105, the inner circumferential surface 81 of the valve body 25, the inner circumferential surface 131 of the disk valve 66, the inner circumferential surface 132 of the disk 111, and the inner circumferential surface 133a of the gasket 113a. In other words, in the shaft portion insertion step, the shaft portion 161a of the pin member 68a is arranged on the inner circumference of the suppression disk 102, the disk 101, the multi-piece disk 105, the valve body 25, the disk valve 66, the disk 111, and the gasket 113a. As a result, the suppression disk 102, the disk 101, the multi-piece disk 105, the valve body 25, the disk valve 66, the disk 111, and the gasket 113a are sequentially placed on the end surface 165 of the flange portion 162. At this time, the valve body 25 is oriented so that the leg portion 37 protrudes from the partition portion 36 toward the flange portion 162 in the axial direction.

[0135] Next, a clamping process is performed.

[0136] In the clamping process, Figure 6 As shown, the end face 166 of the flange portion 162 of the pin member 68a is brought into contact with the mounting table 191 of the riveting device, and the pin member 68a is placed on the mounting table 191. Then, the hook-shaped multiple clamping members 192 of the riveting device are brought into contact with the small outer diameter portion 31 and the large outer diameter portion 32 from the radially outer side of the valve body 25 at the same time. The multiple clamping members 192 are hook-shaped and engage with the step portion 35 between the large outer diameter portion 32 and the small outer diameter portion 31 of the valve body 25. Then, the riveting device pulls the multiple clamping members 192 downward to clamp the valve body 25, the multi-piece disk 105, the disk 101, the suppression disk 102, and the flange portion 162 of the pin member 68a on the mounting table 191. This state is the clamping state of the riveting device.

[0137] Next, while maintaining the clamped state, a residual axial force applying step is performed using a caulking device.

[0138] In the residual axial force applying step, the end surface of the gasket 113a on the axial direction opposite to the valve body 25 is pressed toward the valve body 25 side by the cylindrical axial force applying member 193 of the caulking device. As a result, the flange portion 162, the suppression disk 102, the disk 101, the multi-disk 105, the valve body 25, the disk valve 66, the disk 111, and the gasket 113a are clamped in the axial direction by the mounting table 191 and the axial force applying member 193. In other words, the caulking device applies residual axial force to the suppression disk 102, the disk 101, the multi-disk 105, the valve body 25, the disk valve 66, the disk 111, and the gasket 113a. This state is the residual axial force applying state of the caulking device. The portion of the shaft portion 161a of the pin member 68a that is aligned with the axial position of the shaft portion 161a and faces the gasket 113a in the radial direction becomes the facing portion 185a.

[0139] Next, while maintaining the clamping state and the residual axial force application state, a pressing process is performed using a caulking device. It should be noted that the pressing process can also be performed in parallel with the residual axial force application process (in other words, simultaneously with the residual axial force application process).

[0140] In the pressing process, the pressing portion 194 of the riveting device presses the washer 113a radially inward toward the shaft portion 161a of the pin member 68a. Here, in the riveting device, a plurality of (specifically, 4 places, the same number as the pressing surface 151a) pressing portions 194 are provided at equal intervals in a manner of surrounding the washer 113a on the radial outer side of the washer 113a. And, the 4 pressing portions 194 are simultaneously moved inward along the radial direction of the washer 113a and the shaft portion 161a. At this time, the washer 113a is configured in a manner that each pressing surface 151a extends vertically relative to the advancing direction of the one-to-one corresponding pressing portion 194. And, the washer 113a and the shaft portion 161a are plastically deformed radially inward by simultaneously pressing the washer 113a radially inward using the 4 pressing portions 194. In other words, the washer 113a is horizontally pressed into the depressed shaft portion 161a from four directions. This state is a pressing state of the caulking device.

[0141] Figure 5 and Figure 6 The pin member 68a shown in the figure is formed by performing a pressing process. Figure 7 The pin member 68b shown in FIG. The shaft portion 161b of the pin member 68b is shaped to have an outer peripheral surface 171b and a concave portion 172. The outer peripheral surface 171b is the same as that before the pressing step. Figure 5 and Figure 6 The outer peripheral surface 171a shown is a cylindrical surface with the same diameter. Figure 7The concave portion 172 shown is formed in the pressing process. The concave portion 172 is recessed from the middle position in the axial direction of the outer peripheral surface 171b to the inner side in the radial direction of the outer peripheral surface 171b. As a result, the outer diameter of the portion of the shaft portion 161b of the pin member 68b where the concave portion 172 is formed is smaller than the outer diameter of the portion other than the concave portion 172 in the axial direction of the pin member 68b. In other words, the distance from the central axis of the outer peripheral surface 171b of the shaft portion 161b of the pin member 68b to the concave portion 172 is smaller than the radius of the outer peripheral surface 171b other than the concave portion 172 of the pin member 68b. On the shaft portion 161b, a plurality of (specifically, 4) concave portions 172 are formed at intervals in the circumferential direction of the shaft portion 161b.

[0142] Figure 5 and Figure 6 The gasket 113a shown is plastically deformed by the pressing process to become Figure 7 The gasket 113 shown. The gasket 113 before plastic deformation Figure 5 and Figure 6 The inner circumferential surface 133a shown in the figure becomes the inner circumferential surface 133 entering the concave portion 172 of the shaft portion 161 after plastic deformation. In the washer 113 after plastic deformation, Figure 5 and Figure 6 The small diameter portion 141a shown becomes Figure 7 The small diameter portion 141 shown, Figure 5 and Figure 6 The large diameter portion 142a shown becomes Figure 7 Large diameter portion 142 shown, Figure 5 and Figure 6 The large diameter portion 143a shown becomes Figure 7 The large diameter portion 143 is shown.

[0143] The small diameter portion 141 is provided at the center of the inner peripheral surface 133 in the thickness direction of the gasket 113. In other words, the small diameter portion 141 is located at the center of the gasket 113 in the axial direction. The distance from the center axis of the gasket 113 to the minimum inner diameter portion 181 where the distance from the center axis in the radial direction of the gasket 113 is the smallest is greater than Figure 2 The radius of the inner peripheral surface 81 of the valve body 25 shown is small. In the pressing process, Figure 3 The plurality of (specifically, four) pressing surfaces 151a shown are pressed respectively, so that Figure 7 The small diameter portion 141 shown in the figure has a plurality of (specifically, four) minimum inner diameter portions 181 formed at intervals in the circumferential direction of the small diameter portion 141. Through the pressing process, the minimum inner diameter portion 181 of the small diameter portion 141 of the washer 113 forms the concave bottom surface 182 of the concave portion 172 of the pin member 68b. Therefore, after the pressing process, the minimum inner diameter portion 181 of the small diameter portion 141 of the washer 113 also abuts against the concave bottom surface 182.

[0144] Since the minimum inner diameter portion 181 of the small diameter portion 141 of the washer 113 abuts against the concave bottom surface 182 of the concave portion 172, the radial clearance between the washer 113 and the pin member 68b at the position of the minimum inner diameter portion 181 is smaller than Figure 2 The radial clearance between the valve body 25 and the pin member 68 shown is small.

[0145] Figure 3 to Figure 6 The pressing surface 151a of the gasket 113a shown in the figure is respectively formed by the pressing process. Figure 2 The pressing surface 151 of the gasket 113 is shown.

[0146] like Figure 7 As shown, the large diameter portion 142 of the washer 113 is extended from one end of the small diameter portion 141 in the axial direction of the washer 113 so as to be separated in the axial direction of the washer 113 while increasing in diameter. The large diameter portion 142 is tapered.

[0147] The large diameter portion 143 extends from an end portion of the small diameter portion 141 in the axial direction of the washer 113 on the opposite side to the large diameter portion 142 so as to be separated in the axial direction of the washer 113 while increasing in diameter. The large diameter portion 143 is tapered.

[0148] The concave portion 172 of the shaft portion 161b aligns the axial position of the shaft portion 161b with the inner circumferential surface 133 of the washer 113 and is radially opposed to the inner circumferential surface 133 of the washer 113. The pin member 68b has an opposing portion 185b that aligns the axial position of the pin member 68b with the washer 113 and is radially opposed to the pin member 68b. The opposing portion 185b is formed by Figure 6 The opposing portion 185a of the shaft portion 161a shown is formed Figure 7 The pin member 68b is provided with a recessed portion 172 in the facing portion 185b. The outer diameter of the position of the recessed portion 172 in the facing portion 185b of the shaft portion 161b of the pin member 68b is smaller than the outer diameter of the outer peripheral surface 171b of the portion other than the facing portion 185b in the axial direction of the shaft portion 161b of the pin member 68b.

[0149] In the pressing step, the concave portion 172 may be formed annularly around the entire circumference of the facing portion 185 b . In this case, the small diameter portion 141 enters the concave portion 172 around the entire circumference and contacts the concave bottom surface 182 of the concave portion 172 .

[0150] The large diameter portion 142 of the washer 113 is provided on the side opposite to the disk 111 in the axial direction of the washer 113, and is in a tapered shape that expands from the small diameter portion 141 toward the side opposite to the disk 111. In addition, the large diameter portion 143 of the washer 113 is provided on the disk 111 side in the axial direction of the washer 113, and is in a tapered shape that expands from the small diameter portion 141 toward the disk 111 side.

[0151] Through the pressing process, the gasket 113 a is plastically deformed to become the gasket 113 .

[0152] Figure 6 The pin member 68a shown in the figure has its axial position aligned with the washer 113a and the opposing portion 185a facing the washer 113a in the radial direction. The opposing portion 185a is pressed by the washer 113a in the pressing process and plastically deformed radially inward to become Figure 7 The opposing portion 185b is deformed by the pressing process in such a manner that the diameter of the concave bottom surface 182, the central portion in the axial direction of the shaft portion 161b, becomes the smallest due to the small diameter portion 141 of the washer 113, and the diameters of both sides thereof in the axial direction are enlarged compared to the small diameter portion 141 due to the large diameter portions 142 and 143 of the washer 113.

[0153] Next, the caulking process is performed using the caulking device while maintaining the clamped state, the residual axial force applied state, and the pressed state.

[0154] In the riveting process, the riveting device uses a punch (not shown) to press the front end of the pin member 68b protruding from the washer 113 toward the mounting table 191 side, that is, the flange portion 162 side, along the axial direction to form a riveting device. Figure 2 The circular plate-shaped rivet portion 163 shown in FIG. Figure 7 The axial direction of the shaft portion 161b shown in FIG. Figure 5 and Figure 6 The front end portion on the opposite side of the flange portion 162 shown in the figure is plastically deformed in the axial direction and expanded radially outward to form Figure 2 The riveted portion 163 is shown. As a result, Figure 7 The pin member 68b shown becomes Figure 2 The pin member 68 shown in the figure. In the caulking step, a flat contact surface portion 178 is formed on the caulking portion 163 in accordance with the shape of the end surface of the washer 113 on the caulking portion 163 side in the axial direction.

[0155] Here, by performing the above-mentioned pressing process, Figure 7The opposing portion 185b of the shaft portion 161b of the pin member 68b shown in the figure is in a pressed state where it is pressed radially inward by the washer 113 and plastically deformed. If an axial load for riveting is applied to the pin member 68b in this pressed state during the riveting process, the material of the shaft portion 161b above the washer 113 is intercepted by the washer 113 and is not likely to move downward from the washer 113. Therefore, the radial expansion of the portion of the pin member 68b below the washer 113 in the axial direction can be suppressed while the pin member 68b is riveted. Figure 2 The forming of the rivet 163 is shown.

[0156] That is, during riveting Figure 7 The radial expansion of the pin member 68b shown in the figure is caused by the material of the shaft portion 161b being withdrawn from the radial gap between the washer 113 and the shaft portion 161b of the pin member 68b to the lower side than the washer 113. Figure 6 The pressing step of pressing the washer 113a into the shaft portion 161a is as shown in FIG. Figure 7 As shown, the washer 113 is sunk into the shaft portion 161b. As a result, in the pressing process, i.e., the riveting process, which is later than the pressing process, the material of the shaft portion 161b is not likely to be lower than the washer 113, i.e., Figure 2 The valve body 25 side shown is retracted. Therefore, the radial expansion of the shaft portion 161 caused by the forming of the caulking portion 163 can be suppressed.

[0157] As described above, by performing the shaft portion inserting step, the clamping step, the residual shaft force applying step, the pressing step, and the riveting step, the pin member 68 integrates the restraining disk 102, the disk 101, the multi-disk 105, the valve body 25, the disk valve 66, the disk 111, and the gasket 113. As a result, the body valve 30 is assembled.

[0158] Next, the body valve 30 in the assembled state will be described.

[0159] In the body valve 30, the flange portion 162 of the pin member 68 abuts against the suppression disk 102 in a surface contact manner at the end surface 165, and the rivet portion 163 of the pin member 68 abuts against the gasket 113 in a surface contact manner at the abutting surface portion 178, thereby clamping the components from the suppression disk 102 to the gasket 113. In other words, in the body valve 30, the flange portion 162 and the rivet portion 163 of the pin member 68 clamp the suppression disk 102, the disk 101, the multi-piece disk 105, the valve body 25, the disk valve 66, the disk 111, and the gasket 113 in a state where the residual axial force is applied from both sides in the axial direction. That is, in the body valve 30, the residual axial force applied to the suppression disk 102, the disk 101, the multi-piece disk 105, the valve body 25, the disk valve 66, the disk 111, and the gasket 113 by the above-mentioned residual axial force application process remains.

[0160] like Figure 8As shown in FIG. 1 , the shaft portion 161 of the pin member 68 is formed into a shape having an outer peripheral surface 171 and a concave portion 172. The outer peripheral surface 171 is the same as the concave portion 172 before the pressing process. Figure 5 and Figure 6 The outer peripheral surface 171a shown and the outer peripheral surface 171a before the riveting process Figure 7 The outer peripheral surface 171b shown is a cylindrical surface with the same diameter. Figure 8 As shown, the concave portion 172 is recessed from the outer peripheral surface 171 toward the inner side in the radial direction of the outer peripheral surface 171. Thus, the outer diameter of the portion of the pin member 68 where the concave portion 172 is formed is smaller than the outer diameter of the portion other than the concave portion 172 in the axial direction of the pin member 68. In other words, the distance from the central axis of the outer peripheral surface 171 of the shaft portion 161 to the concave bottom surface 182 of the concave portion 172 is smaller than the radius of the outer peripheral surface 171 other than the concave portion 172 of the shaft portion 161. In the shaft portion 161, a plurality of (specifically, four) concave portions 172 are formed at intervals in the circumferential direction of the shaft portion 161.

[0161] The inner circumferential surface 133 of the washer 113 enters and contacts the concave portion 172 of the shaft portion 161. The minimum inner diameter portion 181 of the small diameter portion 141 of the inner circumferential surface 133 enters and contacts the concave bottom surface 182 of the concave portion 172. As a result, the radial clearance between the shaft portion 161 of the pin member 68 and the minimum inner diameter portion 181 of the washer 113 is 1.3mm. Figure 2 The radial clearance between the valve body 25 and the shaft portion 161 is shown to be small.

[0162] like Figure 8 As shown in FIG. 1 , the pin member 68 has an opposing portion 185 that is aligned with the washer 113 in the axial direction and is radially opposed to the washer 113. The pin member 68 is provided with a concave portion 172 in the opposing portion 185. The outer diameter of the opposing portion 185 of the pin member 68 at the position of the concave portion 172 is smaller than the outer diameter of the portion other than the opposing portion 185 in the axial direction of the pin member 68.

[0163] The rivet portion 163 of the pin member 68 has a pressing plate portion 187 and a residual material portion 188 .

[0164] The pressing plate portion 187 is in the shape of a flat plate and has a contact surface portion 178 .

[0165] The excess material portion 188 protrudes from the radially inner side of the contact surface portion 178 toward the large diameter portion 142 and contacts the large diameter portion 142. Figure 7 The shaft portion 161 b shown is formed by protruding so as to fill the gap between the shaft portion 161 b and the large diameter portion 142 of the washer 113 through a caulking process.

[0166] It should be noted that the concave portion 172 may be formed in an annular shape over the entire circumference of the facing portion 185. In this case, the small diameter portion 141 enters the concave portion 172 over the entire circumference and abuts against the concave bottom surface 182 of the concave portion 172.

[0167] like Figure 2 As shown, the large diameter portion 142 of the gasket 113 is provided on the rivet portion 163 side in the axial direction of the gasket 113, and is in a tapered shape that expands from the small diameter portion 141 toward the side. In addition, the large diameter portion 143 of the gasket 113 is provided on the valve body 25 side in the axial direction of the gasket 113, and is in a tapered shape that expands from the small diameter portion 141a toward the valve body 25 side.

[0168] The flange 162 of the pin member 68 is disc-shaped and spreads outward in the radial direction of the shaft 161 from one axial end of the shaft 161. The end surface 165 of the flange 162 is a flat surface that spreads perpendicularly to the central axis of the outer peripheral surface 171 of the shaft 161.

[0169] The rivet portion 163 of the pin member 68 is provided at the end portion of the shaft portion 161 on the opposite side of the flange portion 162 in the axial direction. The outer diameter of the rivet portion 163 is larger than the outer diameter of the shaft portion 161. The abutting surface portion 178 of the pressing plate portion 187 of the rivet portion 163 on the flange portion 162 side in the axial direction is a plane extending perpendicularly to the central axis of the outer peripheral surface 171 of the shaft portion 161.

[0170] The pin member 68 has a flange portion 162 at one end in the axial direction thereof and a rivet portion 163 at the other end.

[0171] The shaft portion 161 of the pin member 68 is arranged radially inward of the inner circumferential surface 123 of the suppression disk 102, the inner circumferential surface 122 of the disk 101, the inner circumferential surface 121 of each of the multi-piece disks 105, the inner circumferential surface 81 of the valve body 25, the inner circumferential surface 131 of the disk valve 66, the inner circumferential surface 132 of the disk 111, and the inner circumferential surface 133 of the gasket 113. In other words, the pin member 68 is arranged on the inner circumference of the suppression disk 102, the disk 101, the multi-piece disk 105, the partition 36 of the valve body 25, the disk valve 66, and the disk 111. It should be noted that at this time, the valve body 25 is oriented so that the leg portion 37 protrudes from the partition 36 to the side opposite to the caulking portion 163 in the axial direction.

[0172] Furthermore, the pin member 68 clamps the suppression disk 102, the disk 101, the multi-disk 105, the valve body 25, the disk valve 66, the disk 111, and the gasket 113 from both sides in the axial direction by means of the flange portion 162 and the rivet portion 163. Thus, the suppression disk 102, the disk 101, the multi-disk 105, the valve body 25, the disk valve 66, the disk 111, the gasket 113, and the pin member 68 are integrated. In other words, the pin member 68 arranges and integrates the suppression disk 102, the disk 101, the multi-disk 105, the valve body 25, the disk valve 66, the disk 111, and the gasket 113 in the axial direction of the pin member 68. At this time, the flange portion 162 of the pin member 68 abuts against the suppression disk 102 in a surface contact manner at the end face 165, and the rivet portion 163 abuts against the gasket 113 in a surface contact manner at the abutting surface portion 178.

[0173] The body valve 30 is a rivet type in which the suppression disk 102, the disk 101, the multi-piece disk 105, the valve body 25, the disk valve 66, the disk 111, and the gasket 113 are integrally connected by a pin member 68 as a rivet. The pin member 68 clamps the suppression disk 102, the disk 101, the multi-piece disk 105, the valve body 25, the disk valve 66, the disk 111, and the gasket 113 from both sides of the stacking direction while applying residual axial force, thereby integrating them in the axial direction.

[0174] like Figure 1 As shown in FIG. 1 , the body valve 30 assembled as described above is assembled to the inner tube 15 by fitting the small outer diameter portion 31 of the valve body 25 to one axial end portion of the inner tube 15 .

[0175] In the shock absorber 11, the rod 50 moves toward the contraction side, and the piston 45 moves in the direction of contracting the second chamber 49. Therefore, if the pressure of the second chamber 49 is higher than the pressure of the storage chamber 18 by a predetermined value or more, the disk valve 65 of the body valve 30 is deformed so that the outer peripheral side is separated from the valve body 25 in the axial direction. As a result, the disk valve 65 is deformed from Figure 2 The seat 89 shown in FIG. 1 is unseated to open the passage 61. Thus, the oil L flows from Figure 1 The second chamber 49 is shown by Figure 2 The passage hole 130 of the disk valve 66 and the passage 61 of the valve body 25 are shown to Figure 1 The reservoir 18 is shown flowing. Figure 2 The shown suppression disk 102 contacts the disk valve 65 provided between the suppression disk 102 and the valve body 25 , thereby suppressing deformation of the disk valve 65 .

[0176] In buffer 11, Figure 1 The rod 50 shown in the figure moves toward the extension side, and the piston 45 moves toward the first chamber 48. As a result, if the pressure in the second chamber 49 drops to be lower than the pressure in the storage chamber 18, the disk valve 66 of the body valve 30 deforms so that the outer peripheral side is separated from the valve body 25 in the axial direction. As a result, the disk valve 66 is moved away from the valve body 25. Figure 2 The outer seat portion 86 shown in FIG. 1 is unseated to open the passage 62. Thus, the oil L flows from Figure 1 The storage chamber 18 is shown to be connected to the valve body 25 through the passage 62. Figure 1 The disk valve 66 opens the passage 62 when the rod 50 moves toward the extension side, and the oil L flows from the reservoir chamber 18 to the second chamber 49 through the passage 62 . Figure 2 The gasket 113 shown in the figure abuts against the disk valve 66 provided between the gasket 113 and the valve body 25 , thereby suppressing deformation of the disk valve 66 .

[0177] Here, in the body valve 30, a plurality of disc-shaped disc valves 66 may be stacked. In this case, the plurality of disc valves 66 are used to allow the oil L to flow from the body valve 30 through the passage 62. Figure 1 The damping valve on the extension side that generates the damping force when the fluid in the reservoir chamber 18 flows into the second chamber 49 is shown. That is, the body valve 30 of the shock absorber 11 only needs to have at least one disc valve 66 which is a disc-shaped valve member.

[0178] The above-mentioned patent documents 1 and 2 describe a hydraulic shock absorber having a structure in which a valve body and a valve component are integrated with a pin component by inserting a pin component having a flange portion on one side through the valve body and the valve component and riveting the other side of the pin component. If the pin component is riveted in this way, it is possible that a stable damping force characteristic cannot be obtained. That is, during riveting, the material of the pin component will move toward the inner circumference of the valve component, pushing the valve component radially outward and deforming it. As a result, deviations will occur in the damping force characteristic. On the other hand, the type in which the valve body and the valve component are integrated by riveting the pin component can have fewer parts than the type in which the valve body and the valve component are integrated by bolts and nuts, which has advantages in productivity and cost.

[0179] The shock absorber 11 of the first embodiment includes a cylinder 17, a piston 45 provided in the cylinder 17, and a body valve 30 that divides the cylinder 17 into two chambers, namely, a first chamber 48 and a second chamber 49. The body valve 30 includes a valve body 25, at least one disk-shaped disk valve 66, a gasket 113, and a pin member 68. The valve body 25 includes a passage 62. The valve member 66 opens and closes the passage 62. The gasket 113 is provided on the side of the disk valve 66 opposite to the valve body 25. The gasket 113 is thicker than the disk valve 66. The pin member 68 is arranged on the inner periphery of the disk valve 66 and the gasket 113. The pin member 68 has a flange portion 162 at one end and a caulking portion 163 at the other end. The pin member 68 axially aligns and integrates the valve body 25, the disk valve 66, and the gasket 113.

[0180] In the body valve 30 of the shock absorber 11 , the outer diameter of at least a portion of the facing portion 185 of the pin member 68 facing the washer 113 is smaller than the outer diameter of the portion other than the facing portion 185 of the pin member 68 in the axial direction.

[0181] In addition, in the body valve 30 of the shock absorber 11 , the radial clearance between the gasket 113 and the pin member 68 is smaller than the radial clearance between the valve body 25 and the pin member 68 .

[0182] The body valve 30 of the buffer 11 with such a structure can be formed by the following: a residual axial force applying process for applying residual axial force to the valve body 25 and the disk valve 66, a pressing process for pressing the gasket 113a toward the pin component 68a before riveting, and a riveting process for forming the riveted portion 163 by riveting, wherein the valve body 25, the disk valve 66 and the gasket 113 are axially arranged and integrated using the pin component 68.

[0183] As described above, the body valve 30 of the shock absorber 11 is formed by including the pressing step of pressing the washer 113a toward the pin member 68a. Therefore, when the caulking portion 163 is formed on the pin member 68b in the caulking step, the washer 113 pressed toward the pin member 68b can suppress the deformation of the portion of the pin member 68b closer to the disk valve 66 than the washer 113. As a result, the deformation of the disk valve 66 can be suppressed. Therefore, the body valve 30 of the shock absorber 11 can obtain a stable damping force characteristic without deviation. That is, since the disk valve 66 is a suction valve, the body valve 30 can obtain a characteristic that the disk valve 66 opens without substantially generating a damping force without deviation and in a stable manner.

[0184] The body valve 30 of the buffer 11 is a type that integrates the valve body 25 and the disk valve 66 by riveting the pin component 68. Therefore, compared with a type that integrates the valve body 25 and the disk valve 66 by using bolts and nuts, the number of parts can be smaller, which has advantages in productivity and cost.

[0185] In addition, the body valve 30 of the shock absorber 11 is provided with a small diameter portion 141 and large diameter portions 142 and 143 having a larger diameter than the small diameter portion 141 and provided at different positions in the axial direction with respect to the small diameter portion 141, on the inner periphery of the gasket 113. Thus, in the pressing step, the pin member 68 can be effectively pressed by the gasket 113. Thus, deformation of the disk valve 66 can be effectively suppressed.

[0186] In the body valve 30 of the buffer 11, the small diameter portion 141 is located at the center of the washer 113 in the axial direction, and the large diameter portion 142 is provided on the caulking portion 163 side in the axial direction of the washer 113, and is tapered so as to increase in diameter from the small diameter portion 141 toward the caulking portion 163. Therefore, the washer 113a can be smoothly pressed into the pin member 68a.

[0187] In the body valve 30 of the shock absorber 11, the large diameter portion 143 is provided on the valve body 25 side in the axial direction of the gasket 113 and has a tapered shape that increases in diameter from the small diameter portion 141 toward the valve body 25. Therefore, the gasket 113a can be smoothly press-fitted into the pin member 68a.

[0188] In addition, in the body valve 30 of the buffer 11, the small diameter portion 141 is located at the center of the gasket 113 in the axial direction, the large diameter portion 142 is provided on the caulking portion 163 side in the axial direction of the gasket 113, and the large diameter portion 143 is provided on the valve body 25 side in the axial direction of the gasket 113. Therefore, the gasket 113a before deformation of the gasket 113 can be made into a shape that has the same shape even if it is turned over in the axial direction. As a result, the directionality of the assembly of the gasket 113a to the pin member 68a can be eliminated. As a result, when assembling the gasket 113a to the pin member 68a, it is not necessary to confirm the direction, and the assembly becomes easy.

[0189] Here, when manufacturing the body valve 30 of the shock absorber 11 , if the residual axial force applying step and the pressing step are performed simultaneously in parallel, the time required for assembling the body valve 30 can be shortened.

[0190] The first embodiment described above can also be modified as shown in the following Modifications 1 to 4.

[0191] <Variation 1>

[0192] In Modification 1, instead of Figure 6 The hook-shaped clamping members 192 shown in FIG. Fig. 9 and Fig.10 As shown, a plurality of rectangular plate-shaped clamping members 192A are used which move along the axial direction of the valve body 25 and abut against the step portion 35 from the upper side. And, the riveting device presses the plurality of clamping members 192A from the upper side to clamp the valve body 25, the multi-piece disk 105, the disk 101, the suppression disk 102, and the flange portion 162 of the pin member 68a on the mounting table 191. The plurality of clamping members 192A are formed with insertion holes 201 for inserting a jig (not shown) for pressing the pressing portion 194. In this modification 1, the same body valve 30 as the first embodiment described above can be obtained after assembly.

[0193] This modification 1 also achieves the same effects as those of the above-mentioned first embodiment.

[0194] <Variation 2>

[0195] In this modification 2, the gasket 113a is replaced with Fig.11 and Fig.12 The washer 113Ba is shown.

[0196] The gasket 113Ba is in the shape of a disk, and a pressing groove 211 is formed on the outer periphery. The pressing groove 211 extends radially from the cylindrical outer periphery 210 of the gasket 113Ba to the radial inner side. The pressing groove 211 penetrates the gasket 113Ba in the axial direction. The inner end 212 of the pressing groove 211 on the radial inner side of the gasket 113Ba is in the shape of a semi-cylindrical surface. In the gasket 113Ba, a plurality of (specifically, 4) pressing grooves 211 of the same shape are formed at equal intervals in the circumferential direction of the gasket 113Ba.

[0197] The washer 113Ba is mirror-symmetrical in the axial direction. Figure 2 The wall thickness of the disk valve 66 shown is thick. That is, the gasket 113Ba is thicker than the disk valve 66. The rigidity of the gasket 113Ba is higher than that of the disk valve 66.

[0198] The washer 113Ba is also pressed radially inward by the four pressing parts of the riveting device (not shown). At this time, the four pressing parts (not shown) enter the corresponding pressing grooves 211 and abut against the inner end 212 of the pressing grooves 211. In addition, the four pressing parts (not shown) press the inner end 212 of the corresponding pressing grooves 211 to the radial inward of the washer 113Ba.

[0199] The washer 113Ba also has an inner circumferential surface 133a having a small diameter portion 141a, a large diameter portion 142a, and a large diameter portion 143a. The inner circumferential surface 133a also undergoes the shaft portion insertion process, the clamping process, the residual axial force application process, and the pressing process to become the inner circumferential surface 133 having the small diameter portion 141, the large diameter portion 142, and the large diameter portion 143. When the washer 113Ba is used, the concave portion 172 is formed in the opposing portion 185b of the shaft portion 161b of the pin member 68b by the pressing process, and the rivet portion 163 is formed in the pin member 68 by the rivet process.

[0200] The gasket 113Ba is in the shape of a disk having a cylindrical outer peripheral surface 210. Therefore, the gasket formed from the gasket 113Ba through the shaft portion insertion step, the clamping step, the residual shaft force application step, the pressing step, and the caulking step becomes a substantially disk-shaped gasket, which can well suppress deformation of the disk valve 66.

[0201] This modification example 2 also achieves the same effects as those of the above-mentioned first embodiment.

[0202] It should be noted that, in the gasket 113Ba, the pressing grooves 211 may be formed at three locations at equal intervals in the circumferential direction of the gasket 113Ba, or may be formed at five or more locations.

[0203] <Variation 3>

[0204] In the modification 3, the gasket 113a is replaced with Fig.13 and Fig.14 Gasket 113Ca is shown.

[0205] The gasket 113Ca has a disk-shaped disc-shaped portion 221, a disk-shaped disc-shaped portion 222, and a connecting portion 223. The outer peripheral surface 225 of the disc-shaped portion 221 is a cylindrical surface. The outer peripheral surface 226 of the disc-shaped portion 222 is a cylindrical surface. The disc-shaped portion 221 and the disc-shaped portion 222 have the same shape.

[0206] The disc-shaped portion 221 and the disc-shaped portion 222 are coaxially arranged. In this state, the connecting portion 223 is located between the disc-shaped portion 221 and the disc-shaped portion 222 and connects these disc-shaped portions 221 and 222. In the connecting portion 223, a pressing surface 151Ca is formed on its outer periphery. The pressing surface 151Ca is a plane extending vertically relative to the radial direction of the disc-shaped portions 221 and 222. In the gasket 113Ca, a plurality of (specifically, 4 places) pressing surfaces 151Ca of the same shape are formed at equal intervals on its circumference. The pressing surfaces 151Ca and the pressing surfaces 151Ca adjacent to the circumference of the gasket 113a are perpendicular.

[0207] The gasket 113Ca is mirror-symmetrical in the axial direction. The disc-shaped portion 221 and the disc-shaped portion 222 of the gasket 113Ca are thicker than the disc valve 66. That is, the gasket 113Ca is thicker than the disc valve 66. The rigidity of the gasket 113Ca is higher than that of the disc valve 66.

[0208] The washer 113Ca is also pressed radially inward by the four pressing parts of the riveting device (not shown). At this time, the four pressing parts of the riveting device enter between the disk-shaped part 221 and the disk-shaped part 222, and abut against the corresponding pressing surface 151Ca in the vertical direction. In addition, the four pressing parts press the corresponding pressing surface 151Ca radially inward of the washer 113Ca.

[0209] The washer 113Ca also has an inner circumferential surface 133a having a small diameter portion 141a, a large diameter portion 142a, and a large diameter portion 143a. The inner circumferential surface 133a also becomes the inner circumferential surface 133 having the small diameter portion 141, the large diameter portion 142, and the large diameter portion 143 after the pressing process. The washer 113Ca also forms the concave portion 172 in the facing portion 185b of the shaft portion 161b of the pin member 68b through the shaft portion insertion process, the clamping process, the residual shaft force application process, and the pressing process, and forms the rivet portion 163 in the shaft portion 161 through the rivet process.

[0210] The gasket 113Ca is in the shape of a disk having cylindrical outer peripheral surfaces 225 and 226. Therefore, the gasket formed by the shaft portion insertion step, the clamping step, the residual axial force application step, the pressing step, and the caulking step is in the shape of a disk, and deformation of the disk valve 66 can be well suppressed.

[0211] This modification example 3 also achieves the same effects as those of the above-mentioned first embodiment.

[0212] In addition, in the gasket 113Ca, the pressing surface 151Ca may be formed into a cylindrical surface shape coaxial with the outer peripheral surfaces 225 and 226 of the disc-shaped parts 221 and 222 .

[0213] <Variation 4>

[0214] In the modification 4, the gasket 113a is replaced with Fig.15 The gasket 113Da is shown.

[0215] The inner circumferential surface 133Da of the gasket 113Da, which is located at the center of the gasket 113Da in the radial direction, is different from the inner circumferential surface 133a. The inner circumferential surface 133Da is circular when viewed from the thickness direction of the gasket 113Da. The cross section of the inner circumferential surface 133Da at the plane passing through the center of the circle and extending in the thickness direction of the gasket 113Da is arc-shaped, specifically, semicircular. The center of the inner circumferential surface 133Da in the thickness direction of the gasket 113Da is the small diameter portion 141Da. The side of the inner circumferential surface 133Da in the thickness direction of the gasket 113Da that is opposite to the small diameter portion 141Da is the large diameter portion 142Da. The other side of the inner circumferential surface 133Da in the thickness direction of the gasket 113Da that is opposite to the small diameter portion 141Da is the large diameter portion 143Da.

[0216] The diameter of the small diameter portion 141Da is equal to the diameter of the inner peripheral surface 81 of the valve body 25 .

[0217] The large diameter portion 142Da is extended from the small diameter portion 141Da so as to be separated from the gasket 113Da toward one side in the thickness direction while increasing in diameter. The large diameter portion 142Da is a curved surface.

[0218] The large diameter portion 143Da is extended from the small diameter portion 141Da so as to be separated from the other side in the thickness direction of the gasket 113Da while increasing in diameter. The large diameter portion 143Da is a curved surface.

[0219] The small diameter portion 141Da and the large diameter portions 142Da and 143Da have the same central axis. The central axis is the central axis of the inner peripheral surface 133Da. The inner peripheral surface 133Da is located at the center of the gasket 113Da in the radial direction. The central axis of the inner peripheral surface 133Da is consistent with the central axis of the gasket 113Da. The axial direction of the gasket 113Da is consistent with the thickness direction of the gasket 113Da. The small diameter portion 141Da is located at the center of the gasket 113Da in the axial direction.

[0220] The washer 113Da has a small diameter portion 141Da and large diameter portions 142Da and 143Da that are larger in diameter than the small diameter portion 141Da and are provided at different positions in the axial direction of the washer 113Da relative to the small diameter portion 141Da on the inner periphery thereof.

[0221] The gasket 113Da is mirror-symmetrical in the axial direction. The wall thickness of the gasket 113Da is thicker than the wall thickness of the disk valve 66. The rigidity of the gasket 113Da is higher than the rigidity of the disk valve 66.

[0222] The washer 113Da is also pressed radially inward by the four pressing parts 194 of the riveting device. At this time, the four pressing parts 194 of the riveting device move and abut against the corresponding pressing surfaces 151a in the vertical direction. In addition, the four pressing parts 194 press the corresponding pressing surfaces 151a radially inward of the washer 113Da.

[0223] The washer 113Da forms a concave portion in the pin member 68b through a pressing process, the cross-sectional shape of the plane including the central axis of the shaft portion 161b being different from the concave portion 172 of the shaft portion 161b of the pin member 68b. The concave portion is in the shape of an arc in the cross-sectional shape of the plane including the central axis of the shaft portion, following the shape of the inner peripheral surface 133Da of the washer 113Da. The outer diameter of the position of the concave portion provided at the opposing portion of the shaft portion of the pin member is smaller than the outer diameter of the portion other than the opposing portion in the axial direction of the pin member. The minimum distance from the central axis of the shaft portion of the pin member to the concave portion is smaller than the radius of the outer peripheral surface of the pin member other than the concave portion.

[0224] The inner circumferential surface 133Da of the washer (hereinafter referred to as the washer after the riveting process) formed through the shaft insertion process, clamping process, residual axial force application process, pressing process and riveting process of the washer 113Da becomes the inner circumferential surface that enters the concave portion and abuts against it.

[0225] In the gasket after the riveting process, the small diameter portion 141Da of the gasket 113Da becomes the small diameter portion, the large diameter portion 142Da of the gasket 113Da becomes the large diameter portion, and the large diameter portion 143Da of the gasket 113Da becomes the large diameter portion. The small diameter portion of the gasket after the riveting process is arranged at the center of the inner peripheral surface in the thickness direction of the gasket. A large diameter portion of the gasket after the riveting process is arranged on the rivet portion 163 side in the axial direction of the gasket, and is in the shape of a curved surface that expands from the small diameter portion toward the side. In addition, another large diameter portion of the gasket after the riveting process is arranged on the valve body 25 side in the axial direction of the gasket, and is in the shape of a curved surface that expands from the small diameter portion toward the valve body 25 side.

[0226] The minimum inner diameter portion of the small diameter portion of the gasket after the caulking process enters the concave portion of the pin member and contacts the concave bottom of the concave portion. As a result, the radial gap between the gasket and the pin member at the position of the minimum inner diameter portion is smaller than the radial gap between the valve body 25 and the pin member.

[0227] This modification example 4 also achieves the same effects as those of the above-mentioned first embodiment.

[0228] It should be noted that the inner peripheral surface 133a of the gasket 113Ba may be formed in the same shape as the inner peripheral surface 133Da of the gasket 113Da. In addition, the inner peripheral surface 133a of the gasket 113Ca may be formed in the same shape as the inner peripheral surface 133Da of the gasket 113Da.

[0229] [Second Embodiment]

[0230] Then, mainly based on Fig.16 and Fig.17 The second embodiment will be described with the focus on the parts that are different from the first embodiment. It should be noted that the parts that are common to the first embodiment are represented by the same names and the same reference numerals.

[0231] In this second embodiment, if Fig.16 As shown, the buffer 11E has a body valve 30E that is partially different from the body valve 30 .

[0232] The body valve 30E has a spring disk 251 on the side of the disk 111 opposite to the disk valve 66 .

[0233] The spring plate 251 is made of metal and includes a base plate portion 252 and a spring portion 253 .

[0234] The base plate portion 252 is in the shape of a circular flat plate with a hole.

[0235] The inner peripheral surface 255 of the base plate portion 252 is the inner peripheral surface of the spring plate 251 . The diameter of the inner peripheral surface 255 is equal to the diameter of the inner peripheral surface 81 of the valve body 25 .

[0236] The spring portion 253 extends radially outward from the outer peripheral portion of the base portion 252. The spring portion 253 moves away from the base portion 252 in the axial direction as it moves away from the base portion 252 in the radial direction.

[0237] The spring disk 251 has a plurality of spring portions 253 of the same shape arranged at equal intervals in the circumferential direction of the base plate portion 252. The base plate portion 252 of the spring disk 251 abuts against the disk valve 66 in the axial direction of the disk 111. At this time, the plurality of spring portions 253 of the spring disk 251 abut against the disk valve 66.

[0238] The body valve 30E includes a washer 113E (restriction member) on the axially opposite side of the base plate portion 252 of the spring disk 251 from the disk 111 .

[0239] The gasket 113E is made of metal and has a circular plate shape, that is, a disk shape, with holes.

[0240] The gasket 113E has a base plate portion 261 and an outer peripheral plate portion 262 .

[0241] The substrate portion 261 is in the shape of a circular flat plate with a hole. A through hole 265 is formed in the substrate portion 261, which penetrates the substrate portion 261 in the axial direction of the substrate portion 261. A plurality of through holes 265 are formed in the substrate portion 261 at equal intervals in the circumferential direction. In the radial direction of the substrate portion 261, the through hole 265 is arranged outside the substrate portion 252 of the spring disk 251.

[0242] The outer plate portion 262 is annular and is formed radially outside the base plate portion 261. The outer plate portion 262 is annular so as to surround the radially outside of the base plate portion 261. The outer plate portion 262 is offset to one side in the axial direction relative to the base plate portion 261. The outer plate portion 262 protrudes from the base plate portion 261 to one side in the axial direction.

[0243] exist Fig.17 , the gasket 113Ea is shown in a state before being assembled to the body valve 30E. The gasket 113Ea is plastically deformed when assembled to the body valve 30E to become the gasket 113E.

[0244] The gasket 113Ea has a substrate portion 261a and an outer peripheral plate portion 262a. The substrate portion 261a is a circular flat plate with a hole. The outer peripheral plate portion 262a is annular and is formed on the radially outer side of the substrate portion 261a. The outer peripheral plate portion 262a is annular in a manner of surrounding the radially outer side of the substrate portion 261a. The outer peripheral plate portion 262a is offset to one side in the axial direction relative to the substrate portion 261a. The outer peripheral plate portion 262a protrudes to one side in the axial direction from the substrate portion 261a.

[0245] The washer 113Ea has an inner peripheral surface 133a similar to that of the washer 113a at the center of the radial direction, that is, the center of the base plate portion 261a. The large diameter portion 142a of the inner peripheral surface 133a and the large diameter portion 143a of the large diameter portion 143a are arranged on the protruding side of the outer peripheral plate portion 262a in the axial direction of the washer 113Ea.

[0246] The gasket 113Ea has a plurality of pressing surfaces 151 a similar to those of the gasket 113 a at its outer peripheral portion, that is, at the outer peripheral portion of the outer peripheral plate portion 262 a .

[0247] The wall thickness of the gasket 113Ea is thicker than the wall thickness of the disk valve 66. That is, the gasket 113Ea is thicker than the disk valve 66. The rigidity of the gasket 113Ea is higher than the rigidity of the disk valve 66.

[0248] In the method for manufacturing the body valve 30E (in other words, the method for manufacturing the shock absorber 11E) in which the body valve 30E is assembled, the shaft portion inserting step is first performed.

[0249] In the shaft insertion process, Fig.17 As shown, the shaft portion 161a of the pin member 68a is sequentially inserted radially inward of the inner circumferential surface 123 of the suppression disk 102, the inner circumferential surface 122 of the disk 101, the inner circumferential surfaces 121 of each of the multi-piece disks 105, the inner circumferential surface 81 of the valve body 25, the inner circumferential surface 131 of the disk valve 66, the inner circumferential surface 132 of the disk 111, the inner circumferential surface 255 of the spring disk 251, and the inner circumferential surface 133a of the gasket 113Ea. Thus, the suppression disk 102, the disk 101, the multi-piece disk 105, the valve body 25, the disk valve 66, the disk 111, the spring disk 251, and the gasket 113Ea are sequentially placed on the end surface 165 of the flange portion 162. At this time, the valve body 25 is oriented so that the leg portion 37 protrudes from the partition portion 36 toward the flange portion 162 side in the axial direction thereof. At this time, the spring plate 251 is oriented such that the spring portion 253 extends from the substrate portion 252 toward the disk valve 66 and contacts the disk valve 66. At this time, the gasket 113Ea is oriented such that the outer peripheral plate portion 262a protrudes from the substrate portion 261a toward the disk valve 66 in the axial direction of the substrate portion 261a.

[0250] Next, a residual axial force applying step is performed.

[0251] In the residual axial force applying step, the pin member 68a is placed on the mounting table 191 of the caulking device at the end surface 166 of the flange portion 162. In this state, the end surface of the substrate portion 261 of the washer 113Ea on the axial direction opposite to the valve body 25 is pressed toward the valve body 25 side by the cylindrical axial force applying member 193 of the caulking device. As a result, the flange portion 162, the suppression disk 102, the disk 101, the multi-disk 105, the valve body 25, the disk valve 66, the disk 111, the spring disk 251, and the washer 113Ea are clamped in the axial direction by the mounting table 191 and the axial force applying member 193. As a result, the residual axial force is applied to the suppression disk 102, the disk 101, the multi-disk 105, the valve body 25, the disk valve 66, the disk 111, the spring disk 251, and the washer 113. This state is the residual axial force applying state of the caulking device.

[0252] Next, the pressing step is performed while maintaining the residual axial force applied state. Alternatively, the pressing step may be performed in parallel with the residual axial force applying step.

[0253] In the pressing step, the four pressing parts of the riveting device press the washer 113Ea toward the shaft 161a of the pin member 68a in the radial direction inwardly, so that the washer 113Ea and the shaft 161a are plastically deformed inwardly in the radial direction. As a result, the washer 113Ea becomes the washer 113E, and the pin member 68a becomes the pin member 68b.

[0254] Next, the caulking step is performed while maintaining the residual axial force applied state and the pressing state.

[0255] In the riveting process, the riveting device uses a punch (not shown) to press the front end of the pin member 68b protruding from the washer 113E toward the mounting table 191 side, that is, the flange portion 162 side, along the axial direction to form a riveting device. Fig.16 The circular plate-shaped rivet portion 163 is shown.

[0256] As above, Fig.17 The pin member 68a shown becomes Fig.16 The pin assembly 68 is shown.

[0257] As described above, by performing the shaft insertion step, the residual shaft force application step, the pressing step, and the caulking step, the pin member 68 integrates the restraining disk 102, the disk 101, the multi-disk 105, the valve body 25, the disk valve 66, the disk 111, the spring disk 251, and the gasket 113E. As a result, the body valve 30E is assembled.

[0258] In the body valve 30E in the assembled state, an inner peripheral surface 133 similar to that of the gasket 113 is formed on the inner periphery of the base plate portion 261 of the gasket 113E.

[0259] In addition, the shaft portion 161 of the pin member 68 of the body valve 30E in the assembled state has the same shape as that of the first embodiment.

[0260] The second embodiment also achieves the same effects as those of the above-described first embodiment.

[0261] Here, also in the gasket 113Ea of the second embodiment, the inner peripheral surface 133Ea thereof can be modified in the same manner as the inner peripheral surface 133Da of the fourth modification.

[0262] In the second embodiment, the gasket 113Ea can also be circular in outer periphery and modified to have a plurality of pressing grooves 211 as in the second modification. In addition, the inner periphery 133a of the gasket 113Ea can be shaped similarly to the inner periphery 133Da of the fourth modification.

[0263] In addition, the gasket 113Ea of the second embodiment can also be circular in its outer circumference and changed to a shape having a pair of disc-shaped portions and a connecting portion connecting the pair of disc-shaped portions, as in the above-mentioned modification 3. In addition, the inner circumferential surface 133a of the gasket 113Ea can also be made into the same shape as the inner circumferential surface 133Da of the modification 4.

[0264] It should be noted that, although the body valve 30 and 30E are used as examples above, the present invention can also be applied to the case where the piston 45 and the rod 50 are integrated. For example, when the structure of the body valve 30 is applied to the piston 45 side, the mounting shaft portion 52 of the rod 50 is made into the same shape as the shaft portion 161 of the pin member 68. In addition, in the shaft portion insertion process, the mounting shaft portion 52 of the rod 50 is sequentially inserted into the suppression disk 102, the disk 101, the multi-disk 105, the valve body 25, the disk valve 66, the disk 111, and the washer 113. At this time, the suppression disk 102 is brought into contact with the end of the mounting shaft portion 52 side of the main shaft portion 51 in the axial direction. In addition, in the residual axial force application process, the washer 113 is pressurized toward the main shaft portion 51 side along the axial direction of the rod 50, and the residual axial force is applied to the components from the suppression disk 102 to the washer 113. After the residual axial force applying step or in parallel with the residual axial force applying step, in the pressing step, the washer 113 is pressed radially inward toward the mounting shaft portion 52. After the residual axial force applying step and the pressing step, a riveting step is performed to rivet the portion of the mounting shaft portion 52 protruding from the washer 113 to form a riveted portion. Thus, the components from the suppression disk 102 to the washer 113 are integrated by the end portion of the mounting shaft portion 52 side in the axial direction of the main shaft portion 51 and the riveted portion formed on the mounting shaft portion 52. In this case, the leg portion 37, the small outer diameter portion 31, and the large outer diameter portion 32 are removed from the valve body 25, and a sliding component is assembled on the outer periphery of the valve body 25, so that the sliding component is fitted into the inner periphery of the inner tube 15.

[0265] Industrial Applicability

[0266] According to the above-described embodiments and various modified examples of the present invention, a shock absorber, a shock absorber manufacturing method, a valve, and a valve manufacturing method can be provided, which can obtain stable damping force characteristics. Therefore, the industrial applicability is high.

[0267] Description of Reference Numerals

[0268] 11, 11E…buffer, 17…cylinder body, 18…storage chamber (chamber), 25…valve body, 30, 30E…body valve (valve), 45…piston, 49…second chamber (chamber), 50…rod, 62…passage (working fluid passage), 66…disc valve (valve component), 68, 68a…pin component, 113, 113a, 113Ba, 113Ca, 113Da, 113E, 113Ea…washer (limiting component), 141, 141a…small diameter portion, 142, 142a, 143, 143a…large diameter portion, 162…flange portion, 163…rivet portion, 185…opposing portion.

Claims

1. A buffer, characterized in that: have: Cylinder body; A piston disposed in the cylinder; a rod, one end of which is connected to the piston and the other end of which extends from the cylinder; a body valve, which divides the cylinder body into two chambers; The body valve comprises: a valve body having a working fluid passage; at least one disc-shaped valve member that opens and closes the working fluid passage; a restricting member disposed on a side of the valve member opposite to the valve body and thicker than the valve member; a pin member disposed on the inner periphery of the valve member and the limiting member, having a flange portion at one end and a rivet portion at the other end, so that the valve body, the valve member, and the limiting member are aligned and integrated in the axial direction; The outer diameter of a portion of the pin member that faces the restriction member is smaller than a portion other than the facing portion in the axial direction of the pin member.

2. The buffer according to claim 1, The inner periphery of the limiting component is provided with: Small Trail Department; The large diameter portion has a larger diameter than the small diameter portion and is disposed at a different position in the axial direction relative to the small diameter portion.

3. The buffer according to claim 2, The small diameter portion is located at the center of the limiting member in the axial direction. The large diameter portion is provided on the caulking portion side in the axial direction of the restricting member, and has a tapered shape in which the diameter increases from the small diameter portion toward the caulking portion.

4. The buffer according to claim 3, The large diameter portion is provided on the valve body side in the axial direction of the restricting member and has a tapered shape in which the diameter increases from the small diameter portion toward the valve body.

5. A method for manufacturing a buffer, the buffer comprising: a cylinder; a piston disposed in the cylinder; a body valve that divides the cylinder into two chambers; the body valve comprising: a valve body having a working fluid passage; at least one disc-shaped valve member that opens and closes the working fluid passage; a limiting member that is disposed on the side of the valve member opposite to the valve body and is thicker than the valve member; a pin member disposed on the inner periphery of the valve member and the limiting member, having a flange portion at one end and a rivet portion at the other end, so that the valve body, the valve member, and the limiting member are aligned and integrated in the axial direction; The manufacturing method of the buffer is characterized by comprising: a residual axial force applying step of applying a residual axial force to the valve body and the valve member; A pressing step of pressing the limiting member toward the pin member; The riveting step forms the riveted portion by riveting.

6. The method for manufacturing a buffer according to claim 5, The residual axial force applying step and the pressing step are performed simultaneously.

7. A valve used in a buffer, characterized in that: have: a valve body having a working fluid passage; at least one disc-shaped valve member that opens and closes the working fluid passage; a restricting member disposed on a side of the valve member opposite to the valve body and thicker than the valve member; a pin member disposed on the inner periphery of the valve member and the limiting member, having a flange portion at one end and a rivet portion at the other end, so that the valve body, the valve member, and the limiting member are aligned and integrated in the axial direction; A gap between the restricting member and the pin member is smaller than a gap between the valve body and the pin member.

8. A method for manufacturing a valve, the valve being used in a buffer, comprising: a valve body having a working fluid passage; at least one disc-shaped valve member that opens and closes the working fluid passage; a restricting member that is provided on a side of the valve member opposite to the valve body and is thicker than the valve member; a pin member disposed on the inner periphery of the valve member and the limiting member, having a flange portion at one end and a rivet portion at the other end, so that the valve body, the valve member, and the limiting member are aligned and integrated in the axial direction; The valve manufacturing method is characterized by comprising: a residual axial force applying step of applying a residual axial force to the valve body and the valve member; A pressing step of pressing the limiting member toward the pin member; The riveting step forms the riveted portion by riveting.

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