Damping device

Abstract

A vibration damping device (10) includes a piston configured to advance and retreat in response to a force applied from one of a first member and a second member, a sliding member configured to slide along the piston in response to the advancement and retreat of the piston, and a support member having a cylindrical portion and a through-hole formed on an inner side of the cylindrical portion. The piston is inserted into the through-hole. The sliding member includes a protruding portion protruding toward an inner side in a radial direction on the inner side of the cylindrical portion and abutting against an outer circumferential surface of the piston, an outer cylindrical portion disposed on an outer side of the cylindrical portion, and an extending portion extending from one end of the outer cylindrical portion toward the inner side in the radial direction and indirectly or directly linking the protruding portion and the outer cylindrical portion.

Description

Technical Field

[0001] The present invention relates to a vibration damping device sandwiched between a first component and a second component to suppress the vibration of the second component relative to the first component. Background Technology

[0002] For example, hatchbacks, wagons, and vans have rear doors for opening and closing the cargo compartment. The edge of the rear door abuts against the periphery of the cargo compartment opening via rubber-like stops, closing the cargo compartment. However, sometimes the rear door and the vehicle body can resonate due to vibrations during driving or idling, producing unpleasant noises.

[0003] Patent Document 1 discloses an annular seal that slides in contact with the outer peripheral surface of a shaft member. The seal has an X-shaped cross-section and a lip that slides in contact with the shaft member.

[0004] Existing technical documents

[0005] Patent documents

[0006] Patent Document 1: Japanese Patent Application Publication No. 2001-324026 Summary of the Invention

[0007] The problem that the invention aims to solve

[0008] In the seal disclosed in Patent Document 1, only the lip contacts the shaft member to absorb kinetic energy, resulting in a small vibration damping effect. To improve vibration damping performance, it is preferable that the portion in contact with the shaft member to absorb kinetic energy is larger.

[0009] The purpose of this invention is to provide a vibration damping device with improved vibration reduction performance.

[0010] Solution for solving the problem

[0011] To address the aforementioned issues, a vibration damping device according to a certain aspect of the present invention is a device sandwiched between a first member and a second member to suppress the vibration of the second member relative to the first member. This vibration damping device comprises: a fixing member fixed to one of the first and second members, having a cylindrical portion and an insertion hole formed inside the cylindrical portion; a piston inserted into the insertion hole, configured to move forward and backward under force from the other of the first and second members; and a sliding member sliding along the piston according to the forward and backward movement of the piston. The sliding member comprises: a protrusion protruding radially inward from the inner side of the cylindrical portion, abutting against the outer peripheral surface of the piston; an outer cylindrical portion disposed on the outer side of the cylindrical portion; and an extension extending radially inward from one end of the outer cylindrical portion, indirectly or directly connecting the protrusion to the outer cylindrical portion.

[0012] Another aspect of the invention is a vibration damping device sandwiched between a first member and a second member, fixed to one of the first and second members, and suppressing vibration of the second member relative to the first member. This vibration damping device comprises: a piston configured to move forward and backward under force from the other of the first and second members; a sliding member that slides along the piston according to its movement; and a support member having a cylindrical portion and an insertion hole formed inside the cylindrical portion. The piston is inserted into the insertion hole. The sliding member has: a protrusion that protrudes radially inward from the inside of the cylindrical portion and abuts against the outer peripheral surface of the piston; an outer cylindrical portion disposed on the outside of the cylindrical portion; and an extension that extends radially inward from one end of the outer cylindrical portion, indirectly or directly connecting the protrusion to the outer cylindrical portion.

[0013] Invention Effects

[0014] According to the present invention, a vibration damping device with improved vibration damping performance can be provided. Attached Figure Description

[0015] Figure 1 This is a perspective view of the vibration damping device in the embodiment.

[0016] Figure 2 This is an exploded view of the vibration damping device.

[0017] Figure 3 This is a 3D view of the sliding component.

[0018] Figure 4 (a) is a side view of the sliding member. Figure 4 (b) is Figure 5 (a) is a sectional view of the sliding member along line segment A-A.

[0019] Figure 5 (a) is a top view of the sliding component. Figure 5 (b) is a bottom view of the sliding component.

[0020] Figure 6 yes Figure 5 (a) is a perspective view of the sliding member with line segment B-B.

[0021] Figure 7 This is a cross-sectional view of the vibration damping device.

[0022] Figure 8 It is a diagram used to illustrate the action of the sliding member as it slides along the piston.

[0023] Figure 9 This is a three-dimensional view of a modified vibration damping device.

[0024] Figure 10 This is an exploded view of the vibration damping device in a modified example.

[0025] Figure 11 (a) is a top view of the spring. Figure 11 (b) is a side view of the spring.

[0026] Figure 12 It is a three-dimensional sectional view of the rotating component and the gear component.

[0027] Figure 13 This is a diagram used to illustrate the operation of the height adjustment mechanism, showing a perspective view of the fixed component, the moving component, and the gear component.

[0028] Figure 14 It is a three-dimensional view of the sliding member, spring, piston and moving member, and a diagram showing the state in which the sliding member, spring and piston are assembled on the moving member.

[0029] Figure 15 This is a cross-sectional view of a modified vibration damping device.

[0030] Figure 16 This is a top view of the sliding member and spring in a modified vibration damping device. Detailed Implementation

[0031] Figure 1 This is a perspective view of the vibration damping device 10 according to an embodiment. The vibration damping device 10 is fixed to the vehicle's doors and rear doors, and abuts against the side panel of the vehicle body when the doors are closed. The vibration damping device 10 absorbs the impact when the doors close and suppresses unpleasant noise caused by resonance of the doors due to vehicle vibration when they are closed. Furthermore, when the doors are closed, the vibration damping device 10 absorbs the distance difference between the doors and the side panel of the vehicle body. For the vibration damping device 10, a higher loss coefficient results in better vibration damping performance.

[0032] It should be noted that the vibration damping device 10 can also be a fixed body such as a panel on the side of the vehicle body, and abut against the opening / closing body. That is, the vibration damping device 10 can be fixed to one of the opening / closing body and the fixed body, and abut against the other of the opening / closing body and the fixed body. Furthermore, the vibration damping device 10 is not limited to being fixed to the vehicle door, but can also be provided on a cover and a fixed body with an opening that is closed by the cover. Regardless of the method, the vibration damping device 10 is sandwiched between the first member and the second member, suppressing the vibration of the second member relative to the first member.

[0033] The vibration damping device 10 includes: a fixing member 20 fixed to one of a first member and a second member; and a piston and a cover 28 capable of abutting against the other of the first member and the second member. In an embodiment, the fixing member 20 is inserted into a mounting hole provided in a vehicle door and fixed thereto, and the piston and cover 28 abut against the opening edge on the side of the vehicle body when the door is closed.

[0034] Figure 2 This is an exploded view of the vibration damping device 10. The vibration damping device 10 includes a fixed member 20, a sliding member 22, a spring 24, a piston 26, and a cover 28.

[0035] The fixing member 20 includes a cylindrical portion 44, a flange portion 46, an insertion hole 48, a locking claw 50, and an inner protrusion (not shown). The cylindrical portion 44 has an insertion hole 48 formed on its inner side. The piston 26 is inserted into the insertion hole 48.

[0036] A flange 46 extends radially outward from the outer peripheral surface of the cylindrical portion 44 and is positioned approximately at the center of the cylindrical portion 44 in the axial direction. The flange 46 abuts against the sliding member 22 for reception. That is, the fixing member 20 also functions as a support member for supporting the sliding member 22. The locking claw 50 is an elastic claw formed in the cylindrical portion 44 and locks into the mounting hole of the door. It should be noted that the method of fixing to the door is not limited to the shape of the locking claw 50; it can be any shape that can be used to fix it to the panel. Regarding the inner square protrusion (not shown), it will be shown later, but it is formed to extend radially inward from the inner peripheral surface of the cylindrical portion 44.

[0037] The piston 26 has a shaft portion 54, a disc portion 56, an anti-disengagement portion 58, and a recess 60. The shaft portion 54 is formed in the shape of a rod. The disc portion 56 is formed at the top end of the shaft portion 54 and extends radially outward. The recess 60 is formed at the center of the disc portion 56. The anti-disengagement portion 58 is formed in the shape of a claw at the base end of the shaft portion 54 and protrudes radially outward. The anti-disengagement portion 58 hooks onto the fixing member 20 to prevent the piston 26 from disengaging.

[0038] The cover 28, formed in a cup shape from a viscoelastic or soft elastomer material, covers the sliding member 22, the spring 24, and the piston 26. The engaging portion 62 of the cover 28 engages with the outer periphery of the flange portion 46 of the fixing member 20. The cover 28 may also be integral with the piston 26, and the disc portion 56 of the piston 26 may function together with the cover 28 as a pressing portion pressed by the vehicle body. In any case, the cover 28 and the disc portion 56 are subjected to force from the vehicle body.

[0039] Spring 24 is a helical spring that applies force to piston 26. One end of spring 24 is supported on disc portion 56, and the other end of spring 24 is supported by flange portion 46 via sliding member 22.

[0040] The sliding member 22 is generally cylindrical and is assembled to the cylindrical portion 44 of the fixed member 20. The sliding member 22 slides along the piston 26 as the piston 26 moves forward and backward, and slides along the spring 24 as the spring 24 extends and retracts. The sliding member 22 is made of a viscoelastic material such as rubber or a soft elastomer material. To improve damping performance, the sliding member 22 is a viscoelastic material formed from a 4-methyl-1-pentene / α-olefin copolymer and a material containing a thermoplastic resin (excluding the copolymer) or rubber or a soft elastomer. This provides appropriate sliding resistance to the piston 26 and the spring 24. It should be noted that the sliding member 22 is not limited to a viscoelastic material; it can also be a rubbery elastomer.

[0041] Figure 3 This is a perspective view of the sliding member 22. Furthermore, Figure 4 (a) is a side view of the sliding member 22. Figure 4 (b) is Figure 5 (a) is a sectional view of the sliding member 22 along line segment A-A. Figure 5 (a) is a top view of the sliding member 22. Figure 5 (b) is a bottom view of the sliding member 22. Figure 6 yes Figure 5 (a) is a perspective view of the sliding member 22 with line segment B-B.

[0042] The sliding member 22 has an outer cylinder portion 30, an inner cylinder portion 32, an extension portion 34, a protrusion portion 36, a base portion 38, a bulge portion 40, and a gap portion 42. For example... Figure 3 and Figure 4 As shown in (b), the outer cylindrical portion 30 is formed in a cylindrical shape. Figure 4 and Figure 6 As shown, the inner cylinder portion 32 is formed into a cylindrical shape and is located inside the outer cylinder portion 30. The axial length of the inner cylinder portion 32 is shorter than the axial length of the outer cylinder portion 30, and the thickness of the inner cylinder portion 32 is thinner than the thickness of the outer cylinder portion 30. The outer cylinder portion 30 is separate from the inner cylinder portion 32, and one end of the outer cylinder portion 30 and the inner cylinder portion 32 are connected by an extension portion 34.

[0043] like Figure 3 and Figure 4 As shown in (b), the extension 34 extends radially inward from one end of the outer cylinder 30, forming the upper end face of the sliding member 22, and is connected to one end of the inner cylinder 32. That is, the extension 34 connects the outer cylinder 30 and the inner cylinder 32. The extension 34 separates the outer cylinder 30 and the inner cylinder 32 radially.

[0044] like Figure 5As shown in (a), the protrusion 36 protrudes radially inward from the inner cylinder portion 32. Multiple protrusions 36 are formed separately in the circumferential direction. Therefore, the protrusions 36 can abut against the piston 26 from multiple directions, suppressing axial vibration of the piston 26.

[0045] like Figure 4 As shown in (b), the protrusion 36 is located at a position offset axially downward from the upper end face of the extension 34 and at a position offset axially upward from the lower end of the inner cylinder 32. It should be noted that the protrusion 36 may also protrude from the upper end face of the extension 34 and from the lower end of the inner cylinder 32.

[0046] like Figure 5 (a) and Figure 5 As shown in (b), first grooves 36a and second grooves 36b are alternately formed in a plurality of protrusions 36. Figure 5 As shown in (a), the first groove 36a is formed to be concave from top to bottom, as... Figure 5 As shown in (b), the second groove 36b is formed to be recessed from below upwards. The first groove 36a and the second groove 36b (hereinafter referred to as "grooves" without distinction) are formed by cutting off the base end side of the protrusion 36 circumferentially, making the protrusion 36 easily flexible in the radial direction. Furthermore, by alternately providing the first groove 36a and the second groove 36b on the plurality of protrusions 36, the same sliding performance can be achieved whether the piston 26 is moving forward or backward.

[0047] The base portion 38 extends radially outward from the outer cylinder portion 30. The base portion 38 provides a seat for the end (seat portion) of the spring 24, which rests on the flange portion 46. The bulge portion 40 is formed to bulge radially outward from the outer surface of the outer cylinder portion 30, abutting against the inner side of the spring 24. Multiple bulge portions 40 are formed separately in the circumferential direction. A tapered portion 40a is formed at one end of the bulge portion 40, which is inclined toward the base portion 38. The tapered portion 40a prevents the spring 24 from hooking onto the bulge portion 40.

[0048] like Figure 5 (b) and Figure 6 As shown, a gap 42 is formed on the inner side of the bulge 40. By forming a gap on the inner side of the bulge 40, the bulge 40 is easy to flex in the radial direction. Alternatively, the upper end of the bulge 40 can be connected to the outer cylinder 30, while the lower end of the bulge 40 is not connected to the outer cylinder 30, thus providing flexibility even without the gap 42.

[0049] Figure 7 This is a cross-sectional view of the vibration damping device 10. Figure 7 The cross-sectional position shown is... Figure 6Same. The engaging part 62 of the cover 28 engages with the flange part 46, and the cover 28 covers the internal structures such as the spring 24 and the piston 26.

[0050] The shaft portion 54 of the piston 26 is inserted into the through hole 48 of the fixing member 20, and the anti-disengagement portion 58 of the piston 26 is hooked onto the inner protrusion 52 of the fixing member 20. The spring 24 applies force to the disc portion 56 of the piston 26, and the piston 26 under force is prevented from disengaging by the anti-disengagement portion 58.

[0051] The outer cylindrical portion 30 of the sliding member 22 is disposed on the outside of the cylindrical portion 44, and the inner cylindrical portion 32 is disposed on the inside of the cylindrical portion 44, with the outer cylindrical portion 30 and the inner cylindrical portion 32 disposed apart from the cylindrical portion 44. The sliding member 22 is assembled to the cylindrical portion 44 by placing the extension portion 34 on the top end of the cylindrical portion 44.

[0052] The protrusion 36 protrudes radially inward from the inner side of the cylindrical portion 44, abutting against the outer circumferential surface of the piston 26. Thus, the protrusion 36 can slide according to the forward and backward movement of the piston 26, thereby attenuating the movement of the piston 26. Furthermore, the inner cylindrical portion 32 supporting the protrusion 36 is located inside the cylindrical portion 44; therefore, the movement of the protrusion 36 is restricted by the cylindrical portion 44 via the inner cylindrical portion 32, and the protrusion 36 can stably abut against the piston 26.

[0053] The inner protrusion 52 is configured as a shaft portion 54 surrounding the piston 26. The inner protrusion 52 and the protrusion 36 are separated in a manner that maintains a certain axial distance, and the shaft portion 54 can be supported at two points. As a result, the axial vibration of the piston 26 can be suppressed, and the sliding of the protrusion 36 can be stabilized.

[0054] The end (seat) of the spring 24 rests on the base 38 of the sliding member 22. By having the end of the spring 24 rest on the viscoelastic body, the extension and contraction of the spring 24 can be stabilized.

[0055] The inner diameter side of spring 24 abuts against the bulge 40 of sliding member 22. Therefore, spring 24 slides along bulge 40 during extension and retraction. This dampens the vibration of spring 24. Furthermore, sliding member 22 performs sliding of protrusion 36 relative to piston 26 and sliding of bulge 40 relative to spring 24, thereby improving the vibration damping performance of damping device 10. It should be noted that the inner diameter side of spring 24 does not abut against outer cylinder portion 30 where bulge 40 is not formed. That is, the inner diameter of spring 24 is smaller than the diameter of the circumscribed circle of bulge 40, but larger than the diameter of the circumscribed circle of outer cylinder portion 30. If spring 24 abuts against a relatively rigid outer cylinder portion 30, the portion abutting against outer cylinder portion 30 may become non-extensionable, but by abutting against bulge 40, sliding of spring 24 is achieved.

[0056] Figure 8This diagram illustrates the action of the sliding member 22 as it slides along the piston 26. The protrusion 36 slides along the piston 26 and moves axially in response to the forward and backward movement of the piston 26. Figure 8 The diagram shows the state where the protrusion 36 moves upward as the piston 26 travels, thereby lifting the extension 34 upward, and also shows the stress applied to the extension 34. The area where stress is applied to the sliding member 22 due to the upward movement of the protrusion 36 is shown in... Figure 8 It is shown in gray. The extension 34 can move up and down by extending radially inward from the outer cylinder 30.

[0057] The area where stress has been applied is shown to extend mainly from the protrusion 36 to the extension 34. That is, by the up-and-down movement of the protrusion 36, the extension 34 is subjected to stress and deforms, thus exerting a damping force. In this way, the damping force is exerted not only by the up-and-down displacement of the protrusion 36, but also by the deformation of the extension 34, thereby improving the vibration damping performance of the vibration damping device 10.

[0058] Figure 9 This is a perspective view of the vibration damping device 110 in a modified example. Furthermore, Figure 10 This is an exploded view of the modified vibration damping device 110. The modified vibration damping device 110 and... Figure 1 Compared to the vibration damping device 10 shown, the main differences are as follows: the shape of the spring 124 is different, and it has a height adjustment mechanism 170. In the modified example, the sliding member 122 is supported on the moving member 172 by providing a height adjustment mechanism 170, but unlike the modified example, in... Figure 1 The vibration damping device 10 shown is supported by the fixed member 20. That is, in a modified example, the support member for the sliding member 122 is the moving member 172. Figure 1 The middle component is a fixed component 20.

[0059] The vibration damping device 110 includes a fixed component 120, a sliding component 122, a spring 124, a piston 126, a cover 128, a height adjustment mechanism 170, and a washer 178.

[0060] The fixing member 120 has a protrusion 144, a flange 146, an insertion hole 148, and locking claws 150. A pair of locking claws 150 are formed on both sides of the fixing member 120, and the locking claws 150 are flexible and engage with the edge of the mounting hole of the opening / closing body. The protrusion 144 protrudes beyond the flange 146 and is generally annular. The insertion hole 148 allows the moving member 172 to be inserted.

[0061] The protrusion 144 has a guide portion 144a that extends from the flange portion 146 toward the upper end of the protrusion 144 and is formed as an inclined surface. The guide portion 144a guides the rotation of the gear member 176. The washer 178 is fitted to the lower side of the flange portion 146.

[0062] The cover 128 is formed into a cup shape from a viscoelastic or soft elastomer material, covering the sliding member 122, the spring 124, and the piston 126. The cover 128 engages with the moving member 172.

[0063] The piston 126 has a shaft portion 154, a disc portion 156, and an anti-disengagement portion 158. The shaft portion 154 is formed in the shape of a rod. The disc portion 156 is formed at the top end of the shaft portion 154 and extends radially outward. The anti-disengagement portion 158 is formed in the shape of a claw at the base end of the shaft portion 154 and protrudes radially outward. The anti-disengagement portion 158 hooks onto the moving member 172 to prevent the piston 126 from disengaging.

[0064] The sliding member 122 has an outer cylindrical portion 30, an inner cylindrical portion 32, an extension portion 34, a protrusion portion 36, a base portion 38, and a bulge portion 40. The outer cylindrical portion 30 is formed into a cylindrical shape, and the inner cylindrical portion 32 is formed into a cylindrical shape and is located inside the outer cylindrical portion 30. The outer cylindrical portion 30 and the inner cylindrical portion 32 are separated radially, and one end of the outer cylindrical portion 30 and the inner cylindrical portion 32 are connected by the extension portion 34.

[0065] The protrusion 36 protrudes radially inward from the inner cylinder portion 32. Multiple protrusions 36 are formed separately in the circumferential direction. It should be noted that the protrusion 36 may also protrude from the upper end face of the extension portion 34, or from the lower end of the inner cylinder portion 32.

[0066] The pedestal portion 38 extends radially outward from the outer cylinder portion 30. The pedestal portion 38 is where the seat of the spring 124 rests, and it sits on the moving member 172. The bulge portion 40 is formed to bulge radially outward from the outer surface of the outer cylinder portion 30, and abuts against the spring 124. Multiple bulge portions 40 are formed separately in the circumferential direction. A gap can be formed inside the bulge portion 40.

[0067] Spring 124 has a seat 64 and a lifting plate 66. Spring 124 is a metal leaf spring. By making spring 124 a leaf spring, it can be reduced in size axially compared to a coil spring, allowing for assembly even with a small gap between the opening / closing body and the side panel of the vehicle body. (Refer to...) Figure 11 The spring 124 will be described.

[0068] Figure 11 (a) is a top view of spring 124. Figure 11 (b) is a side view of the spring 124. The seat 64 is formed in a ring shape and rests on the pedestal 38 of the sliding member 122. The upright piece 66 rises from the seat 64. Figure 11 As shown in (a) from a top view, it is formed in an arc shape. The upright plate 66 abuts against the disc portion 156 of the piston 126. The top part of the upright plate 66 is bent back towards the seat portion 64.

[0069] The upright piece 66 has a sliding piece 68 formed on its inner edge. The sliding piece 68 is bent upward on the inner edge of the upright piece 66, forming a surface along the axial direction. The sliding piece 68 of the upright piece 66 slides along the outer cylindrical portion 30 of the sliding member 122, particularly along the bulge 40 of the outer cylindrical portion 30.

[0070] Return to Figure 10 The height adjustment mechanism 170 includes a moving member 172, a rotating member 174, and a gear member 176. A height adjustment mechanism 170 is formed between the fixed member 120 and the moving member 172 to maintain the height of the moving member 172 relative to the fixed member 120 in a movable manner. The moving member 172 includes a cylindrical portion 77, a flange portion 78, a through hole 79, a shaft portion 80, a gear portion 82, and an anti-detachment hole 84.

[0071] The movable member 172 is axially movable relative to the fixed member 120, and functions as a support member for the sliding member 122. The shaft portion 80 is formed in a square cylindrical shape and is inserted into the insertion hole 148 of the fixed member 120. Teeth 82 are formed on both sides of the shaft portion 80 along the axial direction.

[0072] A flange 78 extends radially outward from a cylindrical portion 77, forming a disc shape. A cylindrical portion 77 is formed on the upper part of the flange 78, and a shaft portion 80 is formed on the lower part of the flange 78. The cylindrical portion 77 and the shaft portion 80 are formed coaxially. An anti-disengagement hole 84 is formed on the side of the shaft portion 80 to prevent the piston 126 from disengaging. A through hole 79 is formed extending from the cylindrical portion 77 to the inner side of the shaft portion 80, opening axially upward. The height adjustment mechanism 170 will be described with reference to the new drawings.

[0073] Figure 12 This is a perspective sectional view of the rotating member 174 and the gear member 176. The gear member 176 is fitted inside the rotating member 174. The rotating member 174 has a cylindrical portion 86, a support portion 88, and an inner protrusion 90. The support portion 88 is formed protrudingly inside the cylindrical portion 86, and multiple such portions are provided. The support portion 88 engages with and supports the gear member 176.

[0074] The inner protrusion 90 is formed to protrude radially inward and can be displaced radially. The inner protrusion 90 engages with the flange 146 of the fixing member 120 so that the rotating member 174 will not detach from the fixing member 120.

[0075] The gear member 176 has multiple mountain sections 92 and extended mountain sections 94. The multiple mountain sections 92 are multi-layered, while the extended mountain section 94 forms a single mountain section. The extended mountain section 94 is connected to the multiple mountain sections 92 and has fewer mountains compared to the multiple mountain sections 92. The extended mountain section 94 is separately disposed from the cylindrical section 86 and can flex radially outward. The rotating member 174 and the gear member 176 rotate about a central axis relative to the moving member 172.

[0076] Figure 13 This diagram illustrates the operation of the height adjustment mechanism 170, showing a perspective view of the fixed member 120, the movable member 172, and the gear member 176. The gear member 176 can rotate to take two positions: a locked state that restricts the movement of the movable member 172, and an unlocked state that allows the movable member 172 to move. Figure 13 In (a), the gear component 176 is shown in the unlocked state. Figure 13 In (b), the gear member 176 in the locked state is shown. Although not shown, the rotating member 174 rotates integrally with the gear member 176.

[0077] exist Figure 13 When the gear member 176 shown in (a) is in the unlocked state, the extended bevel 94 engages with the tooth 82 of the moving member 172. The extended bevel 94 can flex radially, so the moving member 172 can move axially while flexing the extended bevel 94. Furthermore, by engaging the extended bevel 94 with the tooth 82, the axial position of the moving member 172 can be maintained.

[0078] On the other hand, Figure 13 When the gear member 176 shown in (b) is in the locked state, the multi-layered mountain portion 92 engages with the tooth portion 82. Thus, the axial movement of the moving member 172 is fixed. In the unlocked state, the gear member 176 rests on the flange portion 146, and in the locked state, it is guided by the guide portion 144a onto the protrusion 144. In this way, by rotating the gear member 176, the moving member 172 can be set to a state where it can move axially relative to the fixed member 120 and a state where it cannot move, allowing for height adjustment. Therefore, adjustment can be made in a way that reduces the forward and backward stroke of the piston 126, stabilizing the forward and backward stroke of the piston 126.

[0079] Figure 14 This is a perspective view of the sliding member 122, spring 124, piston 126, and moving member 172, showing the state in which the sliding member 122, spring 124, and piston 126 are assembled into the moving member 172.

[0080] The base portion 38 of the sliding member 122 rests on the flange portion 78 of the moving member 172, and the seat portion 64 of the spring 124 rests on the base portion 38. The piston 126 is inserted into the sliding member 122, and the anti-disengagement portion 158 enters the anti-disengagement hole 84. The sliding member 122 and the spring 124 are mounted on the moving member 172.

[0081] The sliding member 122, spring 124, and piston 126, which are mounted on the moving member 172, move axially. It should be noted that the cover 128 is also fitted onto the piston 126; therefore, the cover 128 moves together with the moving member 172. Thus, when the opening / closing body is closed, the protrusion height of the piston 126 can be adjusted according to the distance difference between the opening / closing body and the panel on the side of the vehicle body, thereby stabilizing the vibration damping performance.

[0082] The spring 124's lifting plate 66 abuts against the inside of the disc portion 156 of the piston 126, applying an axial upward force to the piston 126. Thus, when the piston 126 is pressed back, the lifting plate 66 can be pressed back to its original position. For example, when the opening / closing body is closed and there is vibration on the side of the opening / closing body or the vehicle body, the piston 126 moves forward and backward while being pressed back against the lifting plate 66.

[0083] The sliding plate 68 of the lifting plate 66 slides along the sliding member 122, particularly along the bulge 40 of the outer cylinder portion 30, according to the advance and retreat of the piston 126. This generates friction and damping force based on the advance and retreat of the piston 126. Furthermore, the axial surface of the sliding plate 68 prevents damage to the sliding member 122. Additionally, the height adjustment mechanism 170 allows adjustment to reduce the advance and retreat stroke of the piston 126, thus reducing the stroke of the lifting plate 66. This also suppresses slackness of the lifting plate 66 and stabilizes the force applied by the spring.

[0084] Figure 15 This is a cross-sectional view of the modified vibration damping device 110. Furthermore, Figure 16 This is a top view of the sliding member 122 and the spring 124 in the vibration damping device 110. Figure 15 In the middle, the gear component 176 is mounted on the flange portion 146, in the position as... Figure 13 The unlocked state is as shown in (a). The movable member 172 can move axially upward while the shaft 80 is inserted into the insertion hole 148 of the fixed member 120.

[0085] The cover 128 has a locking portion 96 that is locked to the disc portion 156 of the piston 126. The sliding member 122, the spring 124, the piston 126 and the moving member 172 are provided inside the cover 128.

[0086] The shaft portion 154 of the piston 126 is inserted into the through hole 79 of the moving member 172. The inner cylinder portion 32 and the protrusion 36 of the sliding member 122 are located inside the cylinder portion 77 of the moving member 172, and the outer cylinder portion 30 is located outside the cylinder portion 77. The protrusion 36 abuts against the shaft portion 154 of the piston 126.

[0087] The protrusion 36 of the sliding member 122 slides along the piston 126 when the piston 126 moves forward and backward. Furthermore, as... Figure 16 As shown, the sliding plate 68 of the lifting plate 66 abuts against the bulge 40 of the outer cylinder 30, and the sliding plate 68 of the lifting plate 66 slides along the bulge 40 of the outer cylinder 30 when the piston 126 moves forward and backward. In addition to the sliding of the protrusion 36, the sliding plate 68 of the lifting plate 66 also slides, thereby improving the vibration damping performance.

[0088] The present invention is not limited to the embodiments described above. Various design changes and modifications can be made to the embodiments based on the knowledge of those skilled in the art, and such modified embodiments can also be included within the scope of the present invention.

[0089] In the embodiment, a configuration is shown in which the protrusion 36 is provided on the inner circumferential surface of the inner cylinder portion 32. However, this configuration is not limited to this one; it is also possible to omit the inner cylinder portion 32 and provide the protrusion 36 on the extension portion 34. That is, the extension portion 34 indirectly connects the protrusion 36 to the outer cylinder portion 30 or directly connects the protrusion 36 to the outer cylinder portion 30 via the inner cylinder portion 32.

[0090] Furthermore, in this embodiment, a configuration in which a gap 42 is formed on the inner side of the bulge 40 is shown. However, it is also possible to reduce the width of the bulge 40 to make it easier to bend, thereby eliminating the possibility of forming a gap 42. Additionally, in this embodiment, a configuration in which a first groove 36a and a second groove 36b are formed in the protrusion 36 is shown. However, this is not a limitation, and grooves may not be formed.

[0091] Furthermore, the modified spring 124 can be used for Figure 1 The vibration damping device 10 is shown. In any case, the spring 124 applies an axial upward force to the pistons 26, 126, and slides along the outer cylinder portion 30 of the sliding members 22, 122 according to the advance and retreat of the pistons 26, 126.

[0092] Furthermore, regarding the height adjustment mechanism 170, a scheme including a rotating member 174 and a gear member 176 is shown, but it is not limited to this scheme. For example, the fixed member 120 may have an internal thread, and the moving member 172 may have an external thread, with the internal thread of the fixed member 120 engaging with the external thread of the moving member 172 to enable height adjustment. Moreover, in another scheme, a locking member that locks to the teeth 82 of the moving member 172 may be used instead of the rotating member 174 and the gear member 176. For example, the locking member may also be configured to have a locking pawl that engages with the teeth 82 and a rotating shaft orthogonal to the axial direction, which can be rotated to enter a locked state and an unlocked state.

[0093] Industrial availability

[0094] The present invention relates to a vibration damping device sandwiched between a first component and a second component to suppress vibration of the second component relative to the first component.

[0095] Explanation of reference numerals in the attached figures:

[0096] 10: Vibration damping device; 20: Fixing component; 22: Sliding component; 24: Spring; 26: Piston; 28: Cover; 30: Outer cylinder; 32: Inner cylinder; 34: Extension; 36: Protrusion; 36a: First groove; 36b: Second groove; 38: Base; 40: Bulging; 40a: Conical; 42: Gap; 44: Cylinder; 46: Flange; 48: Through hole; 50: Locking claw; 52: Inner square protrusion; 54: Shaft; 56: Disc; 58: Anti-detachment; 60: Recess; 62: Engaging part.

Claims

1. A vibration damping device, sandwiched between a first member and a second member, suppressing the vibration of the second member relative to the first member, characterized in that it comprises: A fixing member is fixed to one of the first member and the second member, and has a cylindrical portion and an insertion hole formed on the inner side of the cylindrical portion; A piston, inserted into the through hole, is configured to move forward and backward under force from the other of the first member and the second member; The sliding member slides along the piston according to the piston's advance and retraction; as well as The spring applies force to the piston. The sliding member has: The protrusion protrudes radially inward from the inner side of the cylindrical portion and abuts against the outer peripheral surface of the piston; The outer cylindrical portion is disposed on the outside of the cylindrical portion; and An extension portion extends radially inward from one end of the outer cylinder portion, indirectly or directly connecting the protrusion portion to the outer cylinder portion. The sliding member has a bulge that protrudes radially outward from the outer surface of the outer cylinder. A gap is formed on the inner side of the bulge in the radial direction. The spring is disposed on the outer side of the bulge in the radial direction.

2. A vibration damping device, sandwiched between a first component and a second component, fixed to one of the first component and the second component, suppressing the vibration of the second component relative to the first component, characterized in that it comprises: The piston is configured to move forward and backward under force from the other of the first member and the second member; The sliding member slides along the piston according to the piston's advance and retraction; The support member has a cylindrical portion and a through hole formed on the inner side of the cylindrical portion; and The spring applies force to the piston. The piston is inserted into the insertion hole. The sliding member has: The protrusion protrudes radially inward from the inner side of the cylindrical portion and abuts against the outer peripheral surface of the piston; The outer cylindrical portion is disposed on the outside of the cylindrical portion; and An extension portion extends radially inward from one end of the outer cylinder portion, indirectly or directly connecting the protrusion portion to the outer cylinder portion. The sliding member has a bulge that protrudes radially outward from the outer surface of the outer cylinder. A gap is formed on the inner side of the bulge in the radial direction. The spring is disposed on the outer side of the bulge in the radial direction.

3. The vibration damping device according to claim 1 or 2, characterized in that, The sliding member also has an inner cylinder portion disposed on the inner side of the cylinder portion. The extension connects the inner cylinder portion to the outer cylinder portion. The protrusion extends radially inward from the inner cylinder portion.

4. The vibration damping device according to claim 1 or 2, characterized in that, The sliding member has a base portion that extends radially outward from the outer cylinder portion. The seat of the spring is mounted on the base portion.

5. The vibration damping device according to claim 4, characterized in that, The bulge abuts against the inside of the spring.

6. The vibration damping device according to claim 1, 2, or 5, characterized in that, The sliding component is a viscoelastic body.

7. The vibration damping device according to claim 4, characterized in that, The spring has an upright plate that rises from the seat and abuts against the piston.

8. The vibration damping device according to claim 7, characterized in that, The upright piece can slide along the outer cylinder.

9. The vibration damping device according to claim 2, characterized in that, It also has: A fixing component, fixed to one of the first component and the second component. The support member is configured to be movable in the axial direction. A height adjustment mechanism is formed between the fixed member and the supporting member to maintain the height of the supporting member relative to the fixed member in a movable manner. The sliding member is mounted on the supporting member and moves axially according to the movement of the supporting member.

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