Damper, rear derailleur and bicycle

Abstract

The utility model discloses a damper, a rear derailleur and a bicycle, and the damper comprises a damper body which is internally provided with a fluid cavity, the fluid cavity is divided into a first fluid cavity and a second fluid cavity, and the first fluid cavity and the second fluid cavity are both filled with damping fluid; the rotating part is rotationally arranged in the fluid cavity, when the rotating part rotates in the first circumferential direction of the fluid cavity, the first fluid cavity and the second fluid cavity are closed, and the rotating part extrudes the first fluid cavity to provide chain damping force; when the rotating piece rotates in the second circumferential direction of the fluid cavity, the first fluid cavity communicates with the second fluid cavity; the deformable body is arranged in the second fluid cavity and deforms when the damping fluid expands due to high temperature so as to compensate the volume change of the damping fluid; wherein the first circumferential direction is opposite to the second circumferential direction. According to the utility model, the deformable body is arranged in the second fluid cavity, and the deformable body can be extruded when the temperature of the damping liquid rises and expands, so that the deformable body compensates for the volume change of the damping liquid, and the structure in the fluid cavity is prevented from being damaged.

Description

Technical Field

[0001] The utility model relates to the technical field of bicycle accessories, in particular to a damper, a rear derailleur and a bicycle. Background Art

[0002] At present, the rear derailleur is one of the important components on a bicycle. It can realize the chain switching on the rear sprockets with different numbers of teeth to adjust the riding gear of the bicycle.

[0003] When a bicycle passes through a bumpy road, the bumps and vibrations can easily cause the chain to fall off the rear sprocket. In order to prevent the chain from falling off, the prior art provides a damper on the rear derailleur, wherein a rotating part and a damping fluid are provided in the damper, and the rear derailleur is connected to the rotating part. When the chain on the rear derailleur vibrates and falls off in a certain rotation direction, the rear derailleur drives the rotating part to squeeze the damping fluid, and the damping fluid generates pressure in the damper, thereby providing a reverse force when the chain falls off, thereby preventing the chain from falling off.

[0004] However, since the rotating parts rotate in the damper and squeeze the damping fluid, heat energy is generated, causing the damping fluid temperature to rise and expand, or the damper is in an external high-temperature environment, causing the damping fluid temperature to rise and expand. The continuously expanding damping fluid will squeeze the inside of the damper, causing damage to the damper or causing the damping function to fail. Utility Model Content

[0005] The utility model aims to provide a damper, a rear derailleur and a bicycle, aiming to solve the problem that the damper is squeezed by the damping fluid due to high temperature expansion.

[0006] In order to solve the above technical problems, the purpose of the utility model is achieved through the following technical solutions: a damper is provided, comprising:

[0007] The damper body has a fluid cavity formed therein, wherein the fluid cavity is divided into a first fluid cavity and a second fluid cavity, both of which are filled with damping fluid;

[0008] a rotating member, rotatably disposed in the fluid cavity, so that when the rotating member rotates along a first circumferential direction of the fluid cavity, the first fluid cavity and the second fluid cavity are closed, and the first fluid cavity is squeezed to provide a chain damping force; when the rotating member rotates along a second circumferential direction of the fluid cavity, the first fluid cavity and the second fluid cavity are connected;

[0009] a deformable body, disposed in the second fluid chamber and deformed when the damping fluid expands at high temperature to compensate for the volume change of the damping fluid;

[0010] Wherein, the first circumferential direction and the second circumferential direction are opposite.

[0011] Furthermore, the shape of the deformable body is one of cylindrical, spherical, and polygonal.

[0012] Furthermore, the deformable body comprises a deformable body and a connecting shaft, the connecting shaft is fixed in the fluid cavity, and the deformable body is sleeved on the connecting shaft.

[0013] Furthermore, the material of the deformable body is one of high-density sponge, silica gel and rubber.

[0014] Furthermore, a plurality of the deformable bodies are provided.

[0015] Furthermore, a limiting portion is provided in the fluid cavity, and the rotating member can be limited to the limiting portion when rotating toward the second circumferential direction.

[0016] Furthermore, it also includes: a valve, which is disposed in the fluid cavity and is rotatable, and together with the rotating member, divides the fluid cavity into a first fluid cavity and a second fluid cavity;

[0017] An adjusting component is arranged on the outside of the damper body, and one end of the adjusting component extends into the inside of the fluid cavity and is connected to the valve; when the adjusting component is used to drive the valve to rotate to a first position, the first fluid cavity and the second fluid cavity are closed; when the adjusting component is used to drive the valve to rotate to a second position, the first fluid cavity and the second fluid cavity are connected.

[0018] Furthermore, the damper body is provided with a through hole connected to the fluid cavity, and the adjustment assembly includes a rotating member and an elastic member. One end of the rotating member is limited in rotation within the through hole and abuts against the valve. When the rotating member rotates, it can drive the valve to rotate to the second position; the elastic member is located in the fluid cavity and is used to drive the valve to rotate to the first position.

[0019] The embodiment of the utility model further provides a rear derailleur, which comprises the damper as described above.

[0020] An embodiment of the utility model further provides a bicycle, which comprises the rear derailleur as described above.

[0021] The utility model embodiment provides a damper, a rear derailleur and a bicycle, wherein the damper comprises: a damper body, wherein a fluid cavity is provided inside, wherein the fluid cavity is divided into a first fluid cavity and a second fluid cavity and both are filled with a damping fluid; a rotating member, which is rotatably arranged in the fluid cavity, and when the rotating member rotates along a first circumferential direction of the fluid cavity, the first fluid cavity and the second fluid cavity are closed, and the first fluid cavity is squeezed to provide a chain damping force; when the rotating member rotates along a second circumferential direction of the fluid cavity, the first fluid cavity and the second fluid cavity are connected; a deformable body, which is arranged in the second fluid cavity and deforms when the damping fluid is subjected to high temperature expansion to compensate for the volume change of the damping fluid; wherein the first circumferential direction and the second circumferential direction are opposite. The utility model embodiment arranges a deformable body in the second fluid cavity, and when the temperature of the damping fluid increases and expands, the deformable body can be squeezed, so that the deformable body compensates for the volume change of the damping fluid and avoids structural damage in the fluid cavity. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 A schematic diagram of the overall structure of the damper provided by an embodiment of the utility model;

[0024] Figure 2 A schematic diagram of the internal structure of a damper provided in an embodiment of the utility model.

[0025] Description of the symbols in the figure:

[0026] 1. damper body; 11. fluid chamber; 111. first fluid chamber; 112. second fluid chamber; 12. rotating member; 13. limiting part;

[0027] 2. Adjustment component; 21. Rotating member; 22. Elastic member;

[0028] 3. deformable body; 31. connecting shaft; 32. deformable body;

[0029] 4. Valve. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0031] It should be understood that when used in this specification and the appended claims, the terms "include" and "comprises" indicate the presence of described features, integers, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or combinations thereof.

[0032] It should also be understood that the terms used in this utility model specification are only for the purpose of describing specific embodiments and are not intended to limit the utility model. As used in this utility model specification and the appended claims, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are intended to include plural forms.

[0033] It should be further understood that the term “and / or” used in the present specification and the appended claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0034] Combination Figure 1 and Figure 2 The embodiment of the utility model provides a damper, including: a damper body 1, in which a fluid chamber 11 is provided, the fluid chamber 11 is divided into a first fluid chamber 111 and a second fluid chamber 112 and both are filled with damping fluid; a rotating member 12, rotatably arranged in the fluid chamber 11, when the rotating member 12 rotates along a first circumferential direction of the fluid chamber 11, the first fluid chamber 111 and the second fluid chamber 112 are closed, and the first fluid chamber 111 is squeezed to provide a chain damping force; when the rotating member 12 rotates along a second circumferential direction of the fluid chamber 11, the first fluid chamber 111 and the second fluid chamber 112 are connected; a deformable body 3, which is arranged in the second fluid chamber 112 and deforms when the damping fluid expands at high temperature to compensate for the volume change of the damping fluid; wherein the first circumferential direction and the second circumferential direction are opposite, specifically, please refer to Figure 2, the first circumferential direction can be counterclockwise, and the second circumferential direction can be clockwise.

[0035] In the present embodiment, since the fluid chamber 11 is divided into a first fluid chamber 111 and a second fluid chamber 112, and the rotating member 12 is rotatably disposed in the fluid chamber 11, wherein the rotating member 12 is coaxially disposed with the central axis of the fluid chamber 11; the side of the rotating member 12 facing the first circumferential direction may be the first fluid chamber 111, and the side of the rotating member 12 facing the second circumferential direction may be the second fluid chamber 112. Therefore, when the rotating member 12 rotates toward the first circumferential direction, that is, when the rotating member 12 rotates toward the first fluid chamber 111, the volume of the first fluid chamber 111 is reduced, and at the same time, the rotating member 12 squeezes the damping fluid to increase the pressure of the damping fluid in the first fluid chamber 111, and the pressure of the damping fluid acts on the rotating member 12, and the damper obtains the chain damping force.

[0036] In this embodiment, when the rotating member 12 rotates in the second circumferential direction, that is, when the rotating member 12 rotates toward the second fluid chamber 112, the volume of the second fluid chamber 112 is reduced. At this time, the second fluid chamber 112 will be connected with the first fluid chamber 111. Therefore, when the rotating member 12 squeezes the damping fluid in the second fluid chamber 112, the damping fluid can enter the first fluid chamber 111 from the second fluid chamber 112. The damping fluid in the second fluid chamber 112 has no pressure, and the damper has no chain damping force.

[0037] In this embodiment, if the deformable body is arranged in the first fluid cavity 111, when the rotating member 12 squeezes the damping fluid, the damping fluid will also squeeze the deformable body 3. Therefore, the deformable body 3 will absorb the pressure of the damping fluid, thereby causing the damping effect of the damper to decrease. In this embodiment, the deformable body 3 is arranged in the second fluid cavity 112. When the rotating member 12 rotates in the second circumferential direction, that is, when the rotating member 12 rotates toward the second fluid cavity 112, the damper has no damping force. Therefore, the deformable body 3 will not affect the chain damping force of the damper.

[0038] In this embodiment, the rotating member 12 continuously rotates in the fluid chamber 11, which will generate a large amount of heat energy, causing the temperature of the damping fluid in the fluid chamber 11 to rise, or, when the damper is in a high temperature environment, it will also cause the temperature of the damping fluid to rise. When the temperature of the damping fluid rises, it will expand, and the continuously expanding damping fluid will squeeze the circumferential inner wall of the fluid chamber 11 or the structure in the fluid chamber 11, which may easily cause damage to the structure in the fluid chamber 11, thereby affecting the performance of the damper. In order to prevent the damping fluid from continuously expanding at high temperatures, the present application sets a deformable body 3, and the damping fluid can compress the deformable body 3 when it expands at high temperatures, thereby avoiding damage to the internal structure of the damper and improving the service life of the damper.

[0039] In one embodiment, the shape of the deformable body 3 is one of a cylindrical shape, a spherical shape, and a polygonal shape.

[0040] In this embodiment, the present application does not limit the shape of the deformable body 3 , as long as the damping fluid can be compressed when it is expanded by high temperature.

[0041] In one embodiment, the deformable body 3 includes a deformable body 32 and a connecting shaft 31 . The connecting shaft 31 is fixed in the fluid cavity 11 , and the deformable body 32 is sleeved on the connecting shaft 31 .

[0042] In this embodiment, by fixing the deformable body 3 in the fluid cavity 11, when the damping fluid compresses the deformable body 3, the deformable body 3 can be prevented from rolling freely in the fluid cavity 11, thereby improving the effect of the deformable body 3 compensating for the volume change of the damping fluid.

[0043] In a more specific embodiment, the material of the deformable body 32 is one of high-density sponge, silicone and rubber.

[0044] In this embodiment, there is no restriction on the material of the deformable body 32, and the material of the deformable body 32 only needs to be able to be compressed by external force and restore to its original shape after the external force is eliminated. In this embodiment, high-density sponge is preferably used to enhance the effect of the damping fluid compressing the deformation of the deformable body 32, thereby enhancing the effect of the deformable body 32 compensating for the volume change of the damping fluid.

[0045] In one embodiment, a plurality of deformable bodies 3 are provided.

[0046] In this embodiment, providing a plurality of deformable bodies 3 can further enhance the effect of compensating for the volume change of the damping fluid. There is no limitation on the number of the deformable bodies 3 as long as the number of the deformable bodies 3 does not affect the performance of the damper.

[0047] In one embodiment, a limiting portion 13 is disposed in the fluid cavity 11 , and the rotating member 12 can be limited at the limiting portion 13 when rotating toward the second circumferential direction.

[0048] In this embodiment, by providing the limiting portion 13, when the rotating member 12 rotates in the second circumferential direction (ie, in the second fluid cavity 112), the rotating member 12 can be prevented from squeezing the deformable body 3, thereby improving the effect of the deformable body 3 compensating for the volume change of the damping fluid.

[0049] In one embodiment, it also includes: a valve 4, which is arranged in the fluid cavity 11 and is rotatable, and together with the rotating member 12 divides the fluid cavity 11 into a first fluid cavity 111 and a second fluid cavity 112; an adjusting component 2, which is arranged outside the damper body 1, and one end of the adjusting component 2 extends to the inside of the fluid cavity 11 and is connected to the valve 4; when the adjusting component 2 is used to drive the valve 4 to rotate to the first position, the first fluid cavity 111 and the second fluid cavity 112 are closed; when the adjusting component 2 is used to drive the valve 4 to rotate to the second position, the first fluid cavity 111 and the second fluid cavity 112 are connected.

[0050] In this embodiment, the valve 4 is eccentrically arranged with respect to the central axis of the fluid chamber 11 and can abut against the inner wall of the fluid chamber 11 in the first circumferential direction of the fluid chamber 11; the rotating member 12 and the valve 4 cooperate to divide the fluid chamber 11 into a first fluid chamber 111 and a second fluid chamber 112.

[0051] One end of the valve 4 is rotatably mounted in the fluid chamber 11, and the other end of the valve 4 is controlled to rotate by the regulating assembly 2; when the regulating assembly 2 drives the valve 4 to rotate to the first position, the valve 4 abuts against the inner wall of the fluid chamber 11 in the first circumferential direction (such as Figure 2 ), the first fluid chamber 111 and the second fluid chamber 112 are closed. When the rotating member 12 rotates along the first circumferential direction, the rotating member 12 pushes the damping fluid along the first circumferential direction to the valve 4, and the damping fluid cannot enter the second fluid chamber 112 from the first fluid chamber 111. Since the rotation of the rotating member 12 along the first circumferential direction will cause the first fluid chamber 111 to shrink, the pressure of the damping fluid will act on the rotating member 12, so the damper has a damping force at this time.

[0052] When the regulating assembly 2 drives the valve 4 to rotate to the second position, the valve 4 rotates in the second circumferential direction of the fluid chamber 11, the valve 4 is separated from the inner wall of the fluid chamber 11, and the first fluid chamber 111 is connected to the second fluid chamber 112. At this time, no matter whether the rotating member 12 rotates along the first circumferential direction or the second circumferential direction, the damping fluid can flow from the first fluid chamber 111 to the second fluid chamber 112, and the damping fluid will not generate pressure in the fluid chamber 11, so the damper has no damping force at this time.

[0053] Through such a configuration, when the bicycle is ridden on a smooth road, the adjusting component 2 of this embodiment can drive the valve 4 to rotate to the second position so that the damper has no damping force. When the bicycle is ridden on a bumpy road, the adjusting component 2 of this embodiment can drive the valve 4 to rotate to the first position so that the damper has damping force, thereby improving the user's riding experience.

[0054] In one embodiment, the damper body 1 is provided with a through hole connected to the fluid chamber 11, and the adjustment assembly 2 includes a rotating member 21 and an elastic member 22. One end of the rotating member 21 is limited in rotation in the through hole and abuts against the valve 4. When the rotating member 21 rotates, it can drive the valve 4 to rotate to the second position; the elastic member 22 is located in the fluid chamber 11 and is used to drive the valve 4 to rotate to the first position.

[0055] In this embodiment, the rotating member 21 has two states when rotating. The first state is: when the rotating member 21 rotates, it can push the valve 4 to rotate in the second circumferential direction of the fluid chamber 11, that is, push the valve 4 to rotate to the second position, so that the valve 4 is separated from the inner wall of the fluid chamber 11, and the first fluid chamber 111 and the second fluid chamber 112 are connected. The rotating member 21 is limited in the through hole. When the valve 4 is subjected to a force rotating in the first circumferential direction in the fluid chamber 11, it is helpful to prevent the valve 4 from pushing the rotating member 21 to move axially in the through hole, thereby improving the stability of the rotating member 21 pushing the valve 4 to rotate.

[0056] It should be noted that when the rotating member 21 pushes the valve 4 to rotate, the valve 4 will compress the elastic member 22, so that the elastic member 22 has a pre-pressure. Since the rotating member 21 is limited, the pre-pressure of the elastic member 22 cannot push the rotating member 21 to move.

[0057] Furthermore, another state of rotation of the rotating member 21 is: when the rotating member 21 rotates, it can release the restriction on the valve 4 to rotate in the first circumferential direction of the fluid chamber 11. At this time, the pre-pressure of the elastic member 22 is released, and the elastic member 22 pushes the valve 4 along the first circumferential direction of the fluid chamber 11 and abuts against the inner wall of the fluid chamber 11, that is, the elastic member 22 pushes the valve 4 to the first position.

[0058] The elastic member 22 is one of a torsion spring, a spring sheet and a compression spring.

[0059] The embodiment of the utility model further provides a rear derailleur, comprising the damper as described above.

[0060] An embodiment of the utility model further provides a bicycle, comprising the rear derailleur as described above.

[0061] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed by the utility model, and these modifications or replacements should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A damper, characterized in that: include: The damper body has a fluid cavity formed therein, wherein the fluid cavity is divided into a first fluid cavity and a second fluid cavity, both of which are filled with damping fluid; a rotating member, rotatably disposed in the fluid cavity, so that when the rotating member rotates along a first circumferential direction of the fluid cavity, the first fluid cavity and the second fluid cavity are closed, and the first fluid cavity is squeezed to provide a chain damping force; when the rotating member rotates along a second circumferential direction of the fluid cavity, the first fluid cavity and the second fluid cavity are connected; a deformable body, disposed in the second fluid chamber and deformed when the damping fluid expands at high temperature to compensate for the volume change of the damping fluid; Wherein, the first circumferential direction and the second circumferential direction are opposite.

2. The damper according to claim 1, characterized in that: The shape of the deformable body is one of a cylindrical shape, a spherical shape, and a polygonal shape.

3. The damper according to claim 2, characterized in that: The deformable body comprises a deformable body and a connecting shaft, wherein the connecting shaft is fixed in the fluid cavity and the deformable body is sleeved on the connecting shaft.

4. The damper according to claim 3, characterized in that: The material of the deformable body is one of high-density sponge, silica gel and rubber.

5. The damper according to claim 1, characterized in that: The deformable bodies are provided in plurality.

6. The damper according to claim 1, characterized in that: A limiting portion is arranged in the fluid cavity, and the rotating member can be limited at the limiting portion when rotating toward the second circumferential direction.

7. The damper according to claim 1, characterized in that Also includes: a valve, which is disposed in the fluid cavity and is rotatable, and which, together with the rotating member, divides the fluid cavity into a first fluid cavity and a second fluid cavity; An adjusting component is arranged on the outside of the damper body, and one end of the adjusting component extends into the inside of the fluid cavity and is connected to the valve; when the adjusting component is used to drive the valve to rotate to a first position, the first fluid cavity and the second fluid cavity are closed; when the adjusting component is used to drive the valve to rotate to a second position, the first fluid cavity and the second fluid cavity are connected.

8. The damper according to claim 7, characterized in that: The damper body is provided with a through hole connected to the fluid cavity, and the adjustment assembly includes a rotating part and an elastic part. One end of the rotating part is limited to rotate in the through hole and abuts against the valve. When the rotating part rotates, it can drive the valve to rotate to the second position; the elastic part is located in the fluid cavity and is used to drive the valve to rotate to the first position.

9. A rear derailleur, characterized in that: It comprises a damper as described in any one of claims 1 to 8 above.

10. A bicycle, characterized in that: The rear derailleur comprises the rear derailleur as claimed in claim 9 above.

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