Buffer

Abstract

To provide a buffer that can facilitate attachment of components.SOLUTION: A buffer comprises: a first cylinder body 17 having a cylindrical shape; relative movement members 90, 101, 115, and 116 inserted into the first cylinder body 17 from one end in an axial direction of the first cylinder body 17, and for generating damping force by relatively moving in the axial direction with respect to the first cylinder body 17; a first member 19 formed integrally with the first cylinder body 17, and extending outward in a radial direction; and a second member 51 fixed to the first member 19, and formed of a material different from that of the first member 19.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a shock absorber. [Background technology]

[0002] 2. Description of the Related Art In some vehicle shock absorbers, a stay is joined to the outer periphery of a cylinder, and the stay supports a stabilizer (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2020-41571 A Summary of the Invention [Problem to be solved by the invention]

[0004] However, it is desirable to make it easier to attach parts to a shock absorber.

[0005] Therefore, an object of the present invention is to provide a shock absorber that allows for easy attachment of parts. [Means for solving the problem]

[0006] In order to achieve the above-mentioned object, one embodiment of the present invention is configured to have a cylindrical first cylindrical body, a relative moving member that is inserted into the first cylindrical body from one axial end thereof and moves axially relative to the first cylindrical body to generate a damping force, a first member that is integrally molded with the first cylindrical body and extends radially outward, and a second member that is fixed to the first member and is formed of a material different from the first member. Effect of the Invention

[0007] According to the present invention, it is possible to facilitate the attachment of parts. [Brief description of the drawings]

[0008] [Figure 1] 1 is a partially cutaway front view showing a shock absorber according to an embodiment of the present invention. [Diagram 2] FIG. 2 is a partial perspective view showing an outer cylinder member of the shock absorber according to the embodiment of the present invention. [Diagram 3] 4 is a partial perspective view showing a state in which an outer tubular member and a bracket of the shock absorber according to the embodiment of the present invention are in contact with each other. FIG. [Figure 4] FIG. 4 is a partial side view showing a first modified example of an outer cylinder member of the shock absorber according to the embodiment of the present invention. [Diagram 5] 11 is a partial side view showing a second modified example of the outer cylinder member of the shock absorber according to the embodiment of the present invention. FIG. [Figure 6] FIG. 11 is a partial side view showing a third modified example of the outer cylinder member of the shock absorber according to the embodiment of the present invention. [Figure 7] FIG. 11 is a partial side view showing a fourth modified example of the outer cylinder member of the shock absorber according to the embodiment of the present invention. [Figure 8] FIG. 11 is a partial side view showing a fifth modified example of an outer cylinder member of the shock absorber according to the embodiment of the present invention. [Figure 9] FIG. 13 is a partial cross-sectional view showing a state in which a sixth modified example of the outer cylinder member of the shock absorber according to the embodiment of the present invention comes into contact with a modified example of the bracket. [Figure 10] FIG. 13 is a partial side view showing a joined state between a bracket and a seventh modified example of an outer cylinder member of the shock absorber according to an embodiment of the present invention. [Figure 11] FIG. 13 is a partial perspective view showing a seventh modified example of the outer cylinder member of the shock absorber according to the embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A shock absorber according to an embodiment of the present invention will be described below with reference to the drawings. 1 shows a shock absorber 10 according to an embodiment. The shock absorber 10 is used in a suspension device of a vehicle such as an automobile or a railway car. Specifically, the shock absorber 10 is used in a strut-type suspension device of an automobile.

[0010] The shock absorber 10 has an inner cylinder member 12 and an outer cylinder member 14. The inner cylinder member 12 is cylindrical with a bottom. The outer cylinder member 14 is cylindrical with a bottom. The inner diameter of the outer cylinder member 14 is larger than the outer diameter of the inner cylinder member 12. The outer cylinder member 14 is disposed on the outer peripheral side of the inner cylinder member 12. A reservoir chamber 13 is formed between the outer cylinder member 14 and the inner cylinder member 12. A working liquid is sealed inside the inner cylinder member 12 as a working fluid. The reservoir chamber 13 is sealed with a working liquid and a working gas as a working fluid.

[0011] The outer tube member 14 is an integrally molded product that is seamlessly formed as a single unit. The outer tube member 14 is a metal preform. Specifically, the outer tube member 14 is formed by casting an aluminum material. The outer tube member 14 has an outer tube 17 (first tube), a main bracket 18, and a guide 19 (first member). The outer tube 17 is cylindrical with a bottom. The main bracket 18 extends from the outer tube 17 to the outside in the radial direction of the outer tube 17. The guide 19 also extends from the outer tube 17 to the outside in the radial direction of the outer tube 17. In the outer tube member 14, the outer tube 17 and the main bracket 18 are molded seamlessly as a single unit. In the outer tube member 14, the outer tube 17 and the guide 19 are molded seamlessly as a single unit. In other words, the guide 19 is molded integrally with the outer tube 17.

[0012] The outer tube 17 has a side wall portion 21, a bottom portion 22, and a protruding portion 23. The side wall portion 21 is cylindrical. The bottom portion 22 closes one axial end side of the side wall portion 21. The protruding portion 23 protrudes from the bottom portion 22 side of the axial direction of the inner peripheral surface of the side wall portion 21 toward the radially inward direction of the inner tube member 12. The outer tube 17 has an opening 25 on the side opposite the bottom portion 22 in the axial direction of the side wall portion 21. Thus, the outer tube 17 has the opening 25 on one axial end side and the bottom portion 22 on the other axial end side. A plurality of protruding portions 23 are formed intermittently at intervals in the circumferential direction of the outer tube 17.

[0013] Here, the direction in which the central axis of the outer cylinder 17 extends is referred to as the outer cylinder axial direction. The direction perpendicular to the central axis of the outer cylinder 17 is referred to as the outer cylinder radial direction. The circumferential direction of a circle centered on the central axis of the outer cylinder 17 is referred to as the outer cylinder circumferential direction. The opening 25 side of the outer cylinder 17 in the axial direction is referred to as the first end side in the outer cylinder axial direction. The bottom 22 side of the outer cylinder 17 in the axial direction is referred to as the second end side in the outer cylinder axial direction.

[0014] The main bracket 18 is disposed on the bottom 22 side of the side wall portion 21 of the outer tube 17 in the axial direction of the outer tube. That is, the main bracket 18 is provided on the second end side of the side wall portion 21 of the outer tube 17 in the axial direction of the outer tube. As shown in FIG. 2, the main bracket 18 has a pair of flat extending portions 27. The pair of extending portions 27 of the main bracket 18 are seamlessly integrally molded with the side wall portion 21. The pair of extending portions 27 are provided at different positions spaced apart from each other in the circumferential direction of the outer tube with respect to the outer tube 17. The pair of extending portions 27 each extend outward from the outer tube 17 in the radial direction of the outer tube. The pair of extending portions 27 are substantially parallel to each other, and each extends along the axial direction of the outer tube and along the radial direction of the outer tube. Two holes 35 are formed in each of the pair of extending portions 27, spaced apart from each other in the axial direction of the outer tube.

[0015] The guide 19 is disposed on the bottom 22 side of the side wall portion 21 of the outer tube 17 in the axial direction of the outer tube. That is, the guide 19 is provided on the second end side of the side wall portion 21 of the outer tube 17 in the axial direction of the outer tube. The guide 19 is seamlessly molded integrally with the side wall portion 21. The position of the guide 19 in the circumferential direction of the outer tube relative to the side wall portion 21 of the outer tube 17 is different from that of the pair of extension portions 27 of the main bracket 18. The position of the guide 19 in the circumferential direction of the outer tube relative to the side wall portion 21 of the outer tube 17 is different from that of the main bracket 18 by approximately 90 degrees. The guide 19 extends outward from the outer tube 17 in the radial direction of the outer tube. The guide 19 is flat and spreads along the axial direction of the outer tube and along the radial direction of the outer tube. The guide 19 has a mounting hole 41 penetrating in the plate thickness direction. The mounting hole 41 is along the circumferential direction of the outer tube.

[0016] As shown in FIG. 1, a bracket 51 (second member) separate from the outer tube member 14 is attached to the guide 19. The bracket 51 is made of a material different from the outer tube member 14 including the guide 19. Specifically, the bracket 51 is made of iron while the outer tube member 14 is made of aluminum. The bracket 51 has a joint plate portion 52 and a support portion 53. The joint plate portion 52 is flat. A joint hole 55 is formed in the joint plate portion 52, penetrating in the plate thickness direction. The support portion 53 has a root portion 57 and an extension portion 58. The root portion 57 of the support portion 53 is on the joint plate portion 52 side. The root portion 57 extends from one end edge portion of the joint plate portion 52. As shown in FIG. 3, the root portion 57 has a shape of a part of a cylinder. The extension portion 58 of the support portion 53 extends from the edge portion of the root portion 57 opposite to the joint plate portion 52.

[0017] The joint plate portion 52 of the bracket 51 is overlapped with the joint surface 19a of the guide 19 on one side in the plate thickness direction at the abutment surface 52a on one side in the plate thickness direction. At this time, the joint plate portion 52 is in surface contact with the joint surface 19a of the guide 19 at the abutment surface 52a. At this time, the base portion 57 of the bracket 51 is in surface contact with the outer peripheral surface 21a of the side wall portion 21 of the outer tube 17. In this state, as shown in FIG. 1, the bracket 51 is fixed to the guide 19 by a rivet 61 inserted into the mounting hole 41 of the guide 19 and the joint hole 55 of the bracket 51. At this time, the bracket 51 and the guide 19 are pressed by a jig (not shown) from both sides, that is, the opposite surface 52b (one side surface) of the joint plate portion 52 on the opposite side to the guide 19 in the plate thickness direction, and the opposite surface 19b (other side surface) of the guide 19 on the opposite side to the joint plate portion 52 in the plate thickness direction. In this state, the rivet 61 is inserted through the mounting hole 41 of the guide 19 and the joining hole 55 of the bracket 51. The rivet 61 is then crimped with a punch (not shown) and plastically deformed. As a result, the rivet 61 has a shape having a shaft portion 62, a first locking portion 63, and a second locking portion 64.

[0018] The shaft portion 62 is located radially inside the mounting hole 41 of the guide 19 and radially inside the joining hole 55 of the bracket 51. The first locking portion 63 has an outer diameter larger than the inner diameter of the mounting hole 41 and abuts against the opposite surface 19b of the guide 19 on the opposite side to the joining plate portion 52. The second locking portion 64 has an outer diameter larger than the inner diameter of the joining hole 55 and abuts against the opposite surface 52b of the joining plate portion 52 on the opposite side to the guide 19. As a result, the first locking portion 63 and the second locking portion 64 of the rivet 61 clamp the guide 19 and the joining plate portion 52 of the bracket 51 from both sides in the plate thickness direction. In this state, the base portion 57 of the support portion 53 of the bracket 51 abuts against the outer peripheral surface 21a of the side wall portion 21 of the outer cylinder 17. As a result of the above, the bracket 51 is fixed to the guide 19 so as not to move or rotate. In this state, the extension 58 of the support portion 53 of the bracket 51 extends in a direction away from the outer tubular member 14. In this manner, the guide 19 and the bracket 51 are fixed together by riveting, which is a mechanical joint.

[0019] Here, the bracket 51 supports at least one of a harness and a hose. When the bracket 51 supports a harness, the bracket 51 serves as a harness bracket. When the bracket 51 supports a hose, the bracket 51 serves as a hose bracket.

[0020] The inner tube member 12 abuts against the bottom 22 of the outer tube member 14. The inner tube member 12 has an inner tube 71 and a body 72. The inner tube 71 is made of metal. The body 72 is made of metal and is provided so as to close the second end side of the inner tube 71 in the axial direction of the outer tube. The inner tube 71 has an opening 73 on the opposite side to the body 72. The body 72 has a stepped shape on its outer periphery, with a small diameter portion and a large diameter portion having a larger diameter than the small diameter portion. The end of the inner tube 71 on the second end side in the axial direction of the outer tube fits into the small diameter portion of the body 72.

[0021] The shock absorber 10 has a blocking member 81. The blocking member 81 blocks the opening 73 of the inner cylinder member 12 and the opening 25 of the outer cylinder member 14. The blocking member 81 has a rod guide 82 and a seal member 83. The rod guide 82 is annular, and is fitted into both the side wall portion 21 of the outer cylinder 17 and the inner cylinder 71. The seal member 83 is annular, and is disposed on the opposite side of the bottom portion 22 with respect to the rod guide 82, and is fitted into the side wall portion 21 of the outer cylinder 17.

[0022] The rod guide 82 has a stepped shape with a small diameter portion and a large diameter portion on the outer periphery. The body 72 side of the inner tube 71 of the inner tube member 12 is fitted inside the multiple protrusions 23 of the outer tube member 14. The body 72 of the inner tube member 12 abuts against the bottom 22 of the outer tube member 14. The opening 73 of the inner tube member 12 is fitted into the small diameter portion of the outer periphery of the rod guide 82. The large diameter portion of the outer periphery of the rod guide 82 is fitted into the opening 25 side of the side wall portion 21 of the outer tube member 14. As a result, the inner tube member 12 is supported by the outer tube member 14 via the rod guide 82. In this state, the inner tube member 12 is coaxially arranged with the outer tube member 14 and positioned so as not to move in the radial direction.

[0023] The outer tube member 14 has a crimped portion 85 formed at an end of the side wall portion 21 opposite to the bottom portion 22. In other words, the crimped portion 85 is provided on the side wall portion 21 of the outer tube 17 at the first end side in the outer tube axial direction. The crimped portion 85 is formed by plastically deforming the side wall portion 21 radially inward by curling. The inner tube member 12 abuts against the bottom portion 22 of the outer tube member 14 at its body 72. As a result, the rod guide 82 that fits into the inner tube member 12 is positioned axially relative to the outer tube member 14. The seal member 83 is sandwiched between the rod guide 82 thus positioned axially relative to the outer tube member 14 and the crimped portion 85 of the outer tube member 14. The seal member 83 seals the opening 25 side of the outer tube member 14. The inner tube 71 is inserted and fixed inside the outer tube 17.

[0024] The shock absorber 10 has a piston 90 (relatively movable member). The piston 90 is provided in an inner cylinder 71 of an inner cylinder member 12. The piston 90 is inserted into the inside of the outer cylinder 17 from an opening 25 at one axial end of the outer cylinder 17. At that time, the piston 90 is inserted into the inside of the inner cylinder 71 inside the outer cylinder 17 from an opening 73 at one axial end of the inner cylinder 71. The piston 90 is fitted in the inner cylinder 71 so as to be slidable. The piston 90 moves axially relative to each of the outer cylinder 17 and the inner cylinder 71.

[0025] The piston 90 defines a first chamber 91 and a second chamber 92 within the inner cylindrical member 12. The first chamber 91 is provided between the piston 90 and the rod guide 82 within the inner cylindrical member 12. The second chamber 92 is provided between the piston 90 and the body 72 within the inner cylindrical member 12. The second chamber 92 within the inner cylindrical member 12 is defined as a reservoir chamber 13 by the body 72. The first chamber 91 and the second chamber 92 are filled with oil, which is a working fluid. The reservoir chamber 13 is filled with gas, which is a working gas, and oil, which is a working fluid.

[0026] The shock absorber 10 has a rod 101 (relatively movable member). One axial end of the rod 101 is disposed inside the inner cylinder 71 and connected to the piston 90. The other axial end of the rod 101 extends from the inner cylinder 71 and the outer cylinder 17 to the outside through the openings 73 and 25. With the piston 90 connected, the rod 101 is inserted into the outer cylinder 17 from the opening 25 at one axial end of the outer cylinder 17. At that time, the rod 101 is inserted into the inner cylinder 71 inside the outer cylinder 17 from the opening 73 at one axial end of the inner cylinder 71. The rod 101 moves axially relative to the outer cylinder 17 and the inner cylinder 71 together with the piston 90.

[0027] The rod 101 passes through the rod guide 82 and the seal member 83 and extends from the inner cylinder member 12 and the outer cylinder member 14 to the outside. The rod guide 82 restricts the radial movement of the rod 101. The rod 101 moves axially relative to the inner cylinder member 12 and the outer cylinder member 14 together with the piston 90. The seal member 83 closes the gap between the outer cylinder member 14 and the rod 101. The seal member 83 restricts the working liquid in the inner cylinder member 12 and the working gas and working liquid in the reservoir chamber 13 from leaking out to the outside. The shock absorber 10 has the rod 101 connected to the vehicle body.

[0028] A passage 111 and a passage 112 are formed in the piston 90. The passage 111 and the passage 112 penetrate the piston 90 in the axial direction. The passage 111 and the passage 112 can communicate between the first chamber 91 and the second chamber 92. The shock absorber 10 has a disk valve 115 (a relative moving member) and a disk valve 116 (a relative moving member). The disk valve 115 is annular, and is provided on the side of the piston 90 opposite the bottom 22 in the axial direction. The disk valve 115 can close the passage 111 by abutting against the piston 90. The disk valve 116 is annular, and is provided on the bottom 22 side of the piston 90 in the axial direction. The disk valve 116 can close the passage 112 by abutting against the piston 90.

[0029] The disc valve 115 and the disc valve 116 are both connected to the rod 101 and are inserted together with the rod 101 into the interior of the outer cylinder 17 from an opening 25 at one axial end of the outer cylinder 17. At that time, the disc valve 115 and the disc valve 116 are both inserted into the interior of the inner cylinder 71 inside the outer cylinder 17 from an opening 73 at one axial end of the inner cylinder 71. The disc valve 115 and the disc valve 116 move together with the rod 101 and the piston 90 in the axial direction relative to the outer cylinder 17 and the inner cylinder 71, respectively.

[0030] When the rod 101 moves toward the contraction side to increase the amount of entry into the inner cylinder 71 and the outer cylinder 17, the piston 90 moves in a direction narrowing the second chamber 92. Then, the pressure in the second chamber 92 becomes higher than the pressure in the first chamber 91. This causes the disc valve 115 to open the passage 111. At that time, the disc valve 115 generates a damping force. When the rod 101 moves toward the extension side to increase the amount of protrusion from the inner cylinder 71 and the outer cylinder 17, the piston 90 moves in a direction narrowing the first chamber 91. Then, the pressure in the first chamber 91 becomes higher than the pressure in the second chamber 92. This causes the disc valve 116 to open the passage 112. At that time, the disc valve 116 generates a damping force. Therefore, the rod 101, the piston 90, the disc valve 115, and the disc valve 116 move axially relative to the inner cylinder 71 and the outer cylinder 17, generating a damping force.

[0031] A passage 121 and a passage 122 are formed in the body 72 of the inner cylindrical member 12, penetrating in the axial direction. The passage 121 and the passage 122 are capable of communicating between the second chamber 92 and the reservoir chamber 13. The shock absorber 10 has an annular disk valve 125 that can close the passage 121 by abutting against the body 72 on the side of the bottom 22 in the axial direction of the body 72, and has an annular disk valve 126 that can close the passage 122 by abutting against the body 72 on the side of the body 72 opposite to the bottom 22 in the axial direction.

[0032] The disc valve 125 opens the passage 121 when the rod 101 moves to the contraction side and the piston 90 moves in a direction narrowing the second chamber 92, causing the pressure in the second chamber 92 to be higher than the pressure in the reservoir chamber 13 by a predetermined value or more, generating a damping force at that time. The disc valve 126 opens the passage 122 when the rod 101 moves to the extension side and the piston 90 moves toward the first chamber 91, causing the pressure in the second chamber 92 to fall below the pressure in the reservoir chamber 13, and at that time it is a suction valve that allows the working fluid to flow from the reservoir chamber 13 into the second chamber 92 without generating any substantial damping force.

[0033] The above-mentioned Patent Document 1 describes a shock absorber in which a stay is joined to the outer periphery of the cylinder and the stay supports a stabilizer. However, there is a demand for a shock absorber that makes it easier to attach parts to the shock absorber.

[0034] In the shock absorber 10 of this embodiment, the outer tube member 14 has a guide 19 extending radially outward from the outer tube 17. A bracket 51 is fixed to the guide 19 of the outer tube member 14. In the outer tube member 14, the guide 19 is integrally formed with the outer tube 17. This eliminates the need to attach the guide 19 to the outer tube 17. Therefore, the shock absorber 10 makes it possible to easily attach parts.

[0035] Furthermore, in the shock absorber 10, the bracket 51 is fixed to the guide 19 extending radially outward from the outer cylinder 17. Therefore, compared to the case where the bracket 51 is fixed directly to the outer cylinder 17, the influence of distortion and the like that occurs when the bracket 51 is fixed to the guide 19 can be suppressed from affecting the outer cylinder 17.

[0036] Furthermore, in the shock absorber 10, the guide 19 extends radially outward from the outer cylinder 17. This increases the options for the method of joining the guide 19 and the bracket 51. The joining method of the guide 19 and the bracket 51 can be, for example, mechanical joining such as riveting, clinching, and hemming, or fusion joining such as element arc spot welding, electromagnetic welding, and resistance welding. Therefore, the shock absorber 10 can facilitate the installation of parts.

[0037] Furthermore, in the shock absorber 10, the guide 19 extends radially outward from the outer cylinder 17. This increases the degree of freedom in the shape of the bracket 51. This allows for adaptation without requiring any modifications to the vehicle.

[0038] Furthermore, in the shock absorber 10, the outer cylinder member 14 including the guide 19 and the bracket 51 fixed to the guide 19 are formed from different materials. For this reason, if the guide 19 and the bracket 51 are fixed to each other by welding, it becomes difficult to control the quality of the joint. In the shock absorber 10, the guide 19 extends radially outward from the outer cylinder 17, so that the guide 19 and the bracket 51 can be fixed to each other by a joint other than welding. Therefore, it becomes easier to control the quality of the fixing between the guide 19 and the bracket 51.

[0039] Furthermore, in the shock absorber 10, the guide 19 and the bracket 51 are fixed by mechanical joint. Therefore, since the guide 19 extends radially outward from the outer cylinder 17, it is easy to arrange a jig or the like for performing the mechanical joint. Therefore, the guide 19 and the bracket 51 can be mechanically joined easily.

[0040] Moreover, the guide 19 and the bracket 51 are fixed by being pressed from both the opposite surface 52b, which is one side surface, and the opposite surface 19b, which is the other side surface. Therefore, the guide 19 extends radially outward from the outer tube 17, making it easy to arrange a jig or the like that presses the guide 19 and the bracket 51. Therefore, the guide 19 and the bracket 51 can be easily joined.

[0041] <First Modification> The outer tube member 14 described above can also be modified to an outer tube member 14A of a first modified example shown in Fig. 4. In the outer tube member 14A of the first modified example, a guide 19A similar to the guide 19 is arranged at a position in the circumferential direction of the outer tube relative to the side wall portion 21 of the outer tube 17 that is different from that of the guide 19. In the outer tube member 14A of the first modified example, the position of the guide 19A in the circumferential direction of the outer tube relative to the side wall portion 21 of the outer tube 17 is arranged at a position that is different by approximately 180 degrees from that of the main bracket 18. The guide 19A differs from the guide 19 only in the position of the guide 19 in the circumferential direction of the outer tube relative to the side wall portion 21 of the outer tube 17.

[0042] <Second Modification> The outer tube member 14 described above can also be modified to an outer tube member 14B of a second modified example shown in Fig. 5. The outer tube member 14B of the second modified example has a guide 19B that is different in length from the guide 19 in the axial direction of the outer tube. The guide 19B differs from the guide 19 only in the length of the outer tube 17 in the axial direction of the outer tube. The guide 19B is longer in the axial direction of the outer tube than the guide 19. This makes it easy to fix multiple brackets to the guide 19B, for example.

[0043] <Third Modification> The outer tube member 14A of the second modified example described above can also be modified to an outer tube member 14C of a third modified example shown in Fig. 6. The outer tube member 14C of the third modified example has a guide 19C whose length in the axial direction of the outer tube is different from that of the guide 19A. The guide 19C differs from the guide 19A only in its length in the axial direction of the outer tube of the outer tube 17. The guide 19C is longer in the axial direction of the outer tube than the guide 19A. This makes it easy to fix multiple brackets to the guide 19C, for example.

[0044] <Fourth Modification> The outer tube member 14 described above can be modified to an outer tube member 14D of a fourth modified example shown in Fig. 7. In the outer tube member 14D of the fourth modified example, a guide 19D similar to the guide 19 is oriented in a different direction relative to the outer tube 17 than the guide 19. The guide 19D extends along the circumferential direction of the outer tube and along the radial direction of the outer tube. In other words, the guide 19D extends perpendicular to the axial direction of the outer tube. An attachment hole 41 penetrating the guide 19D in the plate thickness direction is aligned with the axial direction of the outer tube.

[0045] <Fifth Modification> The outer tube member 14 described above can be modified to an outer tube member 14E of a fifth modified example shown in Fig. 8. In the outer tube member 14E of the fifth modified example, a guide 19E similar to the guide 19 is oriented in a different direction relative to the outer tube 17 than the guide 19. The guide 19E is inclined with respect to the circumferential direction of the outer tube, inclined with respect to the axial direction of the outer tube, and widens along the radial direction of the outer tube. The mounting hole 41 penetrating the guide 19E in the plate thickness direction is inclined with respect to the circumferential direction of the outer tube, and inclined with respect to the axial direction of the outer tube.

[0046] <Sixth Modification> The outer tube member 14 described above can be modified to an outer tube member 14F of a sixth modified example shown in FIG. 9. In the outer tube member 14F of the sixth modified example, a joint surface 19Fa of a guide 19F is different from a joint surface 19a of a guide 19. A concave portion 141 and a convex portion 142 are alternately formed on the joint surface 19Fa. The concave portion 141 is concave in the plate thickness direction of the guide 19F from the tip surface on the tip side in the protruding direction of the convex portion 142. The convex portion 142 protrudes in the plate thickness direction of the guide 19F from the bottom surface on the back side in the concave direction of the concave portion 141. The concave portion 141 and the convex portion 142 are formed by, for example, plastically deforming the guide 19F by knurling or the like.

[0047] In the sixth modified example, the bracket 51 has a modified bracket 51F having a joint plate portion 52F that is partially different from the joint plate portion 52. In the bracket 51F, the contact surface 52Fa of the joint plate portion 52F is different from the contact surface 52a of the joint plate portion 52. The contact surface 52Fa has a concave portion 151 and a convex portion 152 formed alternately. The concave portion 151 is concave in the plate thickness direction of the joint plate portion 52F from the tip surface on the tip side in the protruding direction of the convex portion 152. The convex portion 152 protrudes in the plate thickness direction of the joint plate portion 52F from the bottom surface on the back side in the concave direction of the concave portion 151. The concave portion 151 and the convex portion 152 are formed by, for example, plastically deforming the joint plate portion 52F by knurling or the like.

[0048] The joint plate portion 52F of the bracket 51F abuts on the joint surface 19Fa of the guide 19F at its abutment surface 52Fa. At that time, the convex portion 152 of the abutment surface 52Fa fits into the concave portion 141 of the joint surface 19Fa, and the convex portion 142 of the joint surface 19Fa fits into the concave portion 151 of the abutment surface 52Fa. This restricts the rotation of the bracket 51F relative to the guide 19F. Therefore, even if the base portion 57 of the bracket 51 is not abutted against the outer circumferential surface 21a of the outer tube 17 as described above, the rotation of the bracket 51F relative to the guide 19F can be restricted.

[0049] <Seventh Modification> The outer tube member 14 described above can also be modified to an outer tube member 14G of a seventh modified example shown in Figures 10 and 11. In the outer tube member 14G of the seventh modified example, a guide 19G has a guide 19 and a pair of regulating portions 162. The pair of regulating portions 162 are formed on both end edges of the guide 19 in the axial direction of the outer tube. Both of the pair of regulating portions 162 protrude from the guide 19 on both sides in the circumferential direction of the outer tube. Both of the pair of regulating portions 162 extend outward in the radial direction of the outer tube from the outer peripheral surface 21a of the outer tube 17.

[0050] When the contact surface 52a of the joint plate portion 52 of the bracket 51 contacts the joint surface 19a of the guide 19, the joint plate portion 52 is fitted between the pair of restricting portions 162. The joint plate portion 52 contacts the pair of restricting portions 162, thereby restricting the rotation of the bracket 51 relative to the guide 19G. Therefore, even if the base portion 57 of the bracket 51 is not contacted with the outer circumferential surface 21a of the outer cylinder 17 as described above, the rotation of the bracket 51 relative to the guide 19G can be restricted.

[0051] In the shock absorber 10 of the embodiment including the first to seventh modified examples, the bracket 51, 51F may be joined to the guides 19, 19A to 19G by a mechanical joining method other than riveting. For example, the bracket 51, 51F may be joined by clinching. In that case, for example, the joining plate portion 52 of the bracket 51, 51F is formed to have a first plate portion and a second plate portion. The first plate portion and the second plate portion sandwich the guides 19, 19A to 19F from both sides in the plate thickness direction. In this state, one side surface of the first plate portion of the joining plate portion 52 that is opposite to the guides 19, 19A to 19F in the plate thickness direction and the other side surface of the second plate portion of the joining plate portion 52 that is opposite to the guides 19, 19A to 19F in the plate thickness direction are pressed by a crimping jig from both sides to plastically deform them. The bracket 51, 51F may be fixed to the guides 19, 19A to 19F by such clinching. In this case, the rivet 61 is not necessary.

[0052] In addition, in the shock absorber 10 of the embodiment including the first to seventh modified examples, the bracket 51, 51F may be fixed to the guides 19, 19A to 19G by welding. In this case, the bracket 51, 51F is fixed to the guides 19, 19A to 19G extending radially outward from the outer cylinder 17. Therefore, compared to the case where the bracket 51, 51F is directly welded to the outer cylinder 17, the influence of heat input when the bracket 51, 51F is fixed to the guides 19, 19A to 19G can be suppressed from affecting the outer cylinder 17. Therefore, compared to the case where the bracket 51, 51F is directly welded to the outer cylinder 17, the occurrence of deformation such as distortion or hole formation in the outer cylinder 17 can be suppressed.

[0053] In addition, in the shock absorber 10 of the embodiment including the first to seventh modified examples, the above structure can be applied to cases other than the case where the bracket 51, 51F supporting at least one of the harness and the hose is fixed to the outer tube member 14. For example, the guide 19, 19A to 19G of the outer tube member 14 may be provided on the outer periphery of the side wall portion 21 of the outer tube 17 at the middle position in the outer tube axial direction, and a stabilizer bracket may be fixed to the guide 19, 19A to 19G. The stabilizer bracket supports the stabilizer. In addition, for example, the guide 19, 19A to 19G of the outer tube member 14 may be provided on the outer periphery of the side wall portion 21 of the outer tube 17 on the first end side in the outer tube axial direction, and a spring seat may be fixed to the guide 19, 19A to 19G. Here, the spring seat supports the lower end of the spring interposed between the vehicle body. [Explanation of symbols]

[0054] 10...shock absorber, 14, 14A to 14G...outer cylinder member, 17...outer cylinder (first cylinder body), 19...19A to 19G...guide (first member), 19b...opposite surface (other side), 51, 51F...bracket (second member), 52b...opposite surface (one side), 90...piston (relative moving member), 101...rod (relative moving member), 115...disc valve (relative moving member), 116...disc valve (relative moving member).

Claims

1. A cylindrical first cylinder body; a relative moving member that is inserted into the first cylindrical body from one axial end of the first cylindrical body and moves relative to the first cylindrical body in the axial direction to generate a damping force; a first member that is integrally formed with the first cylindrical body and extends radially outward; a second member fixed to the first member and formed of a material different from that of the first member; The second member is a shock absorber which is a stabilizer bracket, a harness bracket, a hose bracket, or a spring sheet.

2. The shock absorber according to claim 1 , wherein the first member and the second member are fixed to each other by a mechanical joint.

3. The shock absorber according to claim 2 , wherein the first member and the second member are fixed to each other by being pressed from both one side surface and the other side surface.

Images