Temperature compensation type hydraulic damper and bicycle derailleur

Abstract

The utility model discloses a temperature compensation type hydraulic damper and a bicycle derailleur with the same, and the temperature compensation type hydraulic damper comprises a shell which is internally provided with a closed inner cavity, and the closed inner cavity is configured to contain damping liquid; the limiting cavity is defined by the shell; the elastic capsule membrane divides the limiting cavity into a liquid compensation capsule and a gas compensation capsule in a sealed mode, the liquid compensation capsule is communicated with the sealed inner cavity, and the elastic capsule membrane can elastically deform in the limiting cavity so as to contract or expand the liquid compensation capsule. When the volume of the damping liquid in the closed inner cavity is changed due to temperature change or other reasons, the elastic capsule film can be properly and elastically deformed to shrink or expand the liquid compensation capsule, so that the liquid compensation capsule fills the closed inner cavity with the damping liquid or absorbs the damping liquid from the closed inner cavity, and the temperature compensation effect is achieved; the limiting cavity can limit the maximum elastic deformation quantity of the elastic capsule film, and the situation that normal damping work of the damping liquid is affected due to the fact that the liquid compensation capsule excessively compensates the closed inner cavity is avoided.

Description

TECHNICAL FIELD

[0001] The utility model discloses the technical field of bicycle, and particularly relates to hydraulic damper and chain derailleur. BACKGROUND

[0002] When the bicycle is in violent jolt, the tension wheel has the tendency of instantaneous fast movement towards the slack chain direction due to the up-down inertia effect, and the chain is easy to fall off, and this situation is particularly obvious on the mountain bike. In response to this situation, the hydraulic damper with hydraulic damping mode emerges as the times require, and the damping liquid in the hydraulic damper can provide resistance to prevent the abnormal jumping of the tension wheel. However, due to temperature change and other reasons, the volume of the damping liquid is easy to change, which causes the abnormal pressure in the hydraulic damper, and thus affects the stability of the hydraulic damper. SUMMARY

[0003] The utility model discloses at least solve one of the prior art technical problems. For this purpose, the utility model provides a kind of temperature compensation type hydraulic damper.

[0004] The utility model further provides a kind of bicycle chain derailleur with the above-mentioned hydraulic damper.

[0005] According to the temperature compensation type hydraulic damper of the first aspect embodiment of the utility model, it includes: shell, inside having closed inner cavity, the closed inner cavity is configured to accommodate damping liquid;Limit chamber, which is enclosed by the shell;Elastic capsule membrane is connected with the shell, and the elastic capsule membrane separates the limit chamber into liquid compensation capsule and gas compensation capsule, and the liquid compensation capsule is configured to accommodate damping liquid, and the liquid compensation capsule is communicated with the closed inner cavity by first opening, and the gas compensation capsule is communicated with external environment by second opening, and the elastic capsule membrane can be elastically deformed in the limit chamber to contract or expand the liquid compensation capsule.

[0006] At least has the following beneficial effects: the damper in closed inner cavity accommodates damping liquid, the shell is enclosed to form a limit chamber, and the elastic capsule membrane separates the limit chamber into liquid compensation capsule and gas compensation capsule, and the liquid compensation capsule also accommodates damping liquid and is communicated with the closed inner cavity, when the volume of damping liquid in the closed inner cavity changes due to temperature change or other reasons, the elastic capsule membrane can be moderately elastically deformed to contract or expand the liquid compensation capsule, so that the liquid compensation capsule fills or absorbs damping liquid from the closed inner cavity through the first opening, realizes the effect of temperature compensation, and the limit chamber can limit the maximum elastic deformation of the elastic capsule membrane, prevent the liquid compensation capsule from affecting the normal damping work of damping liquid due to excessive compensation of the closed inner cavity, and the elastic deformation of the elastic capsule membrane will also cause the volume change of the gas compensation capsule, and the gas compensation capsule can fill or absorb air from the external environment through the second opening.

[0007] According to some embodiments of the present application, the elastic capsule membrane comprises a deformation part and a mounting part, the mounting part is fixedly connected with the shell, and the deformation part separates the defined chamber.

[0008] According to some embodiments of the present application, the deformation part extends protrudingly towards the first opening.

[0009] According to some embodiments of the present application, the deformation part is in the shape of a bag with an opening towards the second opening.

[0010] According to some embodiments of the present application, the deformation part is made of rubber or silicone.

[0011] According to some embodiments of the present application, the deformation part and the mounting part are integrally formed.

[0012] According to some embodiments of the present application, the shell comprises a base shell and a gland mounted on the base shell, the defined chamber is enclosed by the base shell and the gland, the first opening is formed on the base shell, the second opening is formed on the gland, and the elastic capsule membrane is clamped between the base shell and the gland.

[0013] According to some embodiments of the present application, the gland is provided with a first mounting hole, the elastic capsule membrane is provided with a second mounting hole, the base shell is provided with a threaded hole, and the gland and the elastic capsule membrane are fastened to the base shell by means of a fastener sequentially passing through the first mounting hole and the second mounting hole and threadedly connecting the threaded hole.

[0014] According to some embodiments of the present application, the fastener is a screw.

[0015] The bicycle derailleur according to the second aspect of the present application comprises the temperature-compensated hydraulic damper according to the first aspect of the present application.

[0016] The bicycle derailleur has all the beneficial effects brought by the temperature-compensated hydraulic damper, which will not be repeated here.

[0017] Additional aspects and advantages of the present application will be given in part in the following description, will become apparent from the following description, or will be learned by practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0018] The present application will be further described below in combination with the drawings and embodiments, in which:

[0019] Figure 1 The figure is a structural schematic diagram of the embodiments of the present application.

[0020] Figure 2 is a sectional view along A-A of Figure 1

[0021] Figure 3 is an exploded schematic view of Figure 1

[0022] Figure 4 is a structural schematic view of the elastic capsule membrane in the embodiment of the utility model.

[0023] The drawing reference: shell 1, base shell 11, first opening 111, threaded hole 112, gland 12, second opening 121, first mounting hole 122, airtight inner cavity 2, defined chamber 3, liquid compensation capsule 31, gas compensation capsule 32, elastic capsule membrane 4, deformation part 41, mounting part 42, second mounting hole 43, fastener 5. DETAILED DESCRIPTION

[0024] The embodiments of the utility model are described in detail below, and the examples of the embodiments are shown in the drawings, wherein the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the utility model and cannot be understood as limiting the utility model.

[0025] In the description of the utility model, if the first, second is described for the purpose of distinguishing technical features, it cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or implicitly indicating the sequence of indicated technical features.

[0026] In the description of the utility model, unless otherwise explicitly limited, the words such as containing, sealing separation, setting, mounting, connecting, enclosing, elastic deformation should be understood in a broad sense, and the person skilled in the art can determine the specific meaning of the above words in the utility model in combination with the specific content of the technical scheme.

[0027] With reference to Figures 1 to 4 The utility model discloses a temperature compensation type hydraulic damper, including shell 1, airtight inner cavity 2, defined chamber 3 and elastic capsule membrane 4.

[0028] Wherein, with reference to Figure 2 Shell 1 has airtight inner cavity 2 inside, and airtight inner cavity 2 is configured to contain damping liquid, and damping liquid can provide resistance effect in work, prevent the abnormal jumping of the tensioning wheel of the bicycle.

[0029] With reference to Figure 2 And Figure 3 ​​The elastic capsule membrane 4 is connected with the shell 1, and the elastic capsule membrane 4 seals and separates the defined cavity 3 into a liquid compensation capsule 31 and a gas compensation capsule 32. The liquid compensation capsule 31 is configured to contain damping liquid, and the liquid compensation capsule 31 is in communication with the closed inner cavity 2 through a first opening 111. The gas compensation capsule 32 is in communication with the external environment through a second opening 121.

[0030] The elastic capsule membrane 4 is at least partially made of an elastic deformation material, and the elastic capsule membrane 4 can elastically deform in the defined cavity 3 to contract or expand the liquid compensation capsule 31.

[0031] With reference to Figure 2 When the damping liquid in the closed inner cavity 2 changes in volume due to temperature change or other reasons, the elastic capsule membrane 4 can elastically deform to contract or expand the liquid compensation capsule 31, so that the liquid compensation capsule 31 fills or absorbs the damping liquid of the closed inner cavity 2 through the first opening 111, thereby achieving the effect of temperature compensation. The defined cavity 3 can limit the maximum elastic deformation of the elastic capsule membrane 4, so as to prevent the liquid compensation capsule 31 from affecting the normal damping work of the damping liquid due to excessive compensation of the closed inner cavity 2.

[0032] In addition, the elastic deformation of the elastic capsule membrane 4 can also cause the volume of the gas compensation capsule 32 to change, and the gas compensation capsule 32 can correspondingly fill or absorb air from the external environment through the second opening 121, so as to ensure that the elastic deformation of the elastic capsule membrane 4 is not hindered by the pressure in the gas compensation capsule 32.

[0033] With reference to Figures 2 to 4 In some embodiments, the elastic capsule membrane 4 includes a deformation part 41 and a mounting part 42. The mounting part 42 is fixedly connected with the shell 1, and the deformation part 41 separates the defined cavity 3, thereby ensuring that the elastic capsule membrane 4 is firmly connected with the shell 1.

[0034] In some embodiments, the deformation part 41 extends protrudingly towards the first opening 111, and from the perspective of the liquid compensation capsule 31, with reference to Figure 2 and Figure 4 The deformation part 41 is generally arc-shaped, and by changing the height of the protruding arch of the deformation part 41, the liquid compensation capsule 31 can be contracted or expanded, thereby facilitating the elastic deformation of the deformation part 41.

[0035] From the perspective of the gas compensation capsule 32, with reference to Figure 2 and Figure 3 The deformation part 41 can be in the form of a bag that is open towards the second opening 121, and by changing the bag depth of the deformation part 41, the gas compensation capsule 32 can be contracted or expanded, thereby facilitating the elastic deformation of the deformation part 41.

[0036] The deformation part 41 can be made of rubber, can be made of silica gel, or can be made of other elastic deformation materials. The mounting part 42 does not require the function of elastic deformation, and therefore can be made of a non-elastic material, of course, can also be made of the same material as the deformation part 41, and the deformation part 41 and the mounting part 42 are integrally formed.

[0037] In some embodiments, with reference to Figures 1 to 3 The shell 1 includes a base shell 11 and a cover 12, the cover 12 is mounted on the base shell 11, a first opening 111 is formed on the base shell 11, and a second opening 121 is formed on the cover 12. Specifically, the position of the base shell 11 corresponding to the second opening 121 can be recessed, or the position of the cover 12 corresponding to the first opening 111 can be recessed, so that the base shell 11 and the cover 12 form a defined chamber 3, and the elastic bag film 4 is clamped between the base shell 11 and the cover 12.

[0038] With reference to Figure 3 and Figure 4 In some embodiments, the cover 12 is provided with a first mounting hole 122, the elastic bag film 4 is provided with a second mounting hole 43, and the base shell 11 is provided with a threaded hole 112. The cover 12 and the elastic bag film 4 are fastened to the base shell 11 by means of a fastener 5, which passes through the first mounting hole 122 and the second mounting hole 43 in sequence and is screwed into the threaded hole 112. This can not only firmly connect the base shell 11, the elastic bag film 4 and the cover 12, but also effectively prevent the liquid compensation bag 31 from leaking damping liquid from between the elastic bag film 4 and the base shell 11. The fastener 5 can be a screw.

[0039] The utility model discloses still a kind of bicycle chain derailleur, including the temperature compensation type hydraulic damper of above-mentioned embodiment. The bicycle chain derailleur has all beneficial effects brought by the temperature compensation type hydraulic damper of above-mentioned embodiment, which is not repeated here.

[0040] The technical features of the above-mentioned embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described, but as long as the combination of the technical features does not exist contradictory, it should be considered as the scope of the present application.

[0041] Of course, the utility model is not limited to the above-mentioned implementation, and those skilled in the art can make equivalent modifications or replacements without departing from the spirit of the utility model, and these equivalent modifications or replacements are all included in the scope defined by the claims of the present application.

Claims

1. Temperature-compensated hydraulic damper, characterized in that The temperature-compensated hydraulic damper comprises: a shell having a closed inner cavity inside, the closed inner cavity being configured to accommodate damping liquid; a defined cavity being enclosed by the shell; an elastic membrane connected with the shell, the elastic membrane sealingly separating the defined cavity into a liquid compensation bladder and a gas compensation bladder, the liquid compensation bladder being configured to accommodate damping liquid, the liquid compensation bladder being in communication with the closed inner cavity through a first opening, the gas compensation bladder being in communication with the external environment through a second opening, the elastic membrane being capable of elastically deforming within the defined cavity to contract or expand the liquid compensation bladder.

2. The temperature-compensated hydraulic damper of claim 1, wherein, The elastic membrane comprises a deformation portion and a mounting portion, the mounting portion being fixedly connected with the shell, and the deformation portion separating the defined cavity.

3. The temperature-compensated hydraulic damper of claim 2, wherein, The deformation portion extends convexly towards the first opening.

4. The temperature-compensated hydraulic damper of claim 3, wherein, The deformation portion is in the shape of a bag with an opening towards the second opening.

5. Temperature-compensated hydraulic damper according to any one of claims 2 to 4, characterized in that The deformation portion is made of rubber or silicone.

6. The temperature-compensated hydraulic damper of claim 5, wherein, The deformation portion and the mounting portion are integrally formed.

7. The temperature-compensated hydraulic damper of claim 1, wherein, The shell comprises a base shell and a gland mounted on the base shell, the defined cavity being enclosed by the base shell and the gland, the first opening being formed on the base shell, the second opening being formed on the gland, and the elastic membrane being clamped between the base shell and the gland.

8. The temperature-compensated hydraulic damper of claim 7, wherein, The gland is provided with a first mounting hole, the elastic membrane is provided with a second mounting hole, and the base shell is provided with a threaded hole, the gland and the elastic membrane being fastened to the base shell by means of a fastener sequentially passing through the first mounting hole and the second mounting hole and being threadedly connected to the threaded hole.

9. The temperature-compensated hydraulic damper of claim 8, wherein, The fastener is a screw.

10. Bicycle derailleur, characterized in that, The temperature-compensated hydraulic damper according to any one of claims 1 to 9.

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