Hydraulic shock absorber for a saddle of a bicycle

Abstract

The application discloses a bicycle saddle hydraulic shock absorber, which comprises an outer cylinder, an inner cylinder and a piston rod, first and second cavities are arranged on the outer cylinder and the inner cylinder respectively, the piston rod is fixed to the bottom surface of the first cavity, a third cavity is concavely arranged on the piston rod, one end of the inner cylinder is movably arranged in the first cavity, one end of the piston rod is movably arranged in the second cavity, the one end of the inner cylinder is provided with an annular flange which surrounds the piston rod, the one end of the piston rod is provided with an annular boss which abuts against the inner cylinder, a first space is clamped between the inner wall of the outer cylinder, the bottom of the first cavity, the outer wall of the piston rod and the annular flange, a second space is clamped between the inner wall of the inner cylinder, the outer wall of the piston rod, the annular boss and the annular flange, and a first through hole and a second through hole which are respectively communicated with the first space and the second space are arranged on the inner wall of the third cavity. The shock absorber is matched in structure, so that a more direct damping effect is achieved, and a rider can obtain a more comfortable riding experience.

Description

Technical Field

[0001] This application relates to the field of shock absorbers, and in particular to a hydraulic shock absorber for bicycle seats. Background Technology

[0002] The hydraulic shock absorber for bicycle saddles needs to have the dual function of a seatpost and a hydraulic shock absorber. It should connect the saddle and seatpost and bear the load while providing hydraulic shock absorption for the saddle. The shock absorber should have the functions of bearing load, reciprocating motion, and limiting radial rotation. The existing shock absorption effect is not good. Utility Model Content

[0003] The purpose of this invention is to provide a hydraulic shock absorber for bicycle seats to overcome the shortcomings of the prior art.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] This application discloses a hydraulic shock absorber for a bicycle seat, characterized in that it includes an outer cylinder, an inner cylinder, and a piston rod. The outer cylinder and inner cylinder have a first cavity and a second cavity respectively on their opposing end faces. The piston rod is fixed to the bottom surface of the first cavity. A third cavity is recessed on the end face of the piston rod facing the inner cylinder. The end of the inner cylinder facing the first cavity is movably disposed within the first cavity, and the end of the piston rod facing the second cavity is movably disposed within the second cavity. The end of the inner cylinder facing the second cavity has an annular flange surrounding the piston rod. The end of the piston rod located in the second cavity has a... An annular boss abuts against the inner cylinder. A first space is sandwiched between the inner wall of the outer cylinder, the bottom of the first cavity, the outer wall of the piston rod, and the annular flange. A second space is sandwiched between the inner wall of the inner cylinder, the outer wall of the piston rod, the annular boss, and the annular flange. A first through hole and a second through hole are provided on the inner wall of the third cavity, respectively communicating with the first space and the second space. A first spring is fixed in the third cavity. The end of the first spring that is not connected to the third cavity is fixedly connected to the annular boss. A second spring is provided in the second space. The two ends of the second spring are fixedly connected to the annular boss and the annular flange, respectively.

[0006] Preferably, in the above-mentioned bicycle seat hydraulic shock absorber, a dust cover is fixed to the end of the first cavity.

[0007] Preferably, in the above-mentioned bicycle seat hydraulic shock absorber, an oil seal is fixed on the inner wall of the outer cylinder, which abuts against the outer wall of the inner cylinder.

[0008] Preferably, in the above-mentioned hydraulic shock absorber for bicycle seats, a piston ring is provided on the outer wall of the annular boss that abuts against the inner wall of the inner cylinder.

[0009] Preferably, in the above hydraulic shock absorber for a bicycle saddle, a buffer pad is fixed to the bottom surface of said first space.

[0010] Compared with the prior art, the advantages of the present utility model are:

[0011] Through the cooperation of a plurality of cavities, spaces, inner and outer cylinders and a piston rod, a more direct shock absorption effect is achieved, enabling riders to obtain a more comfortable riding experience. Description of Drawings

[0012] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the accompanying drawings required for the description of the embodiments or the prior art will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments recorded in the present application, and those skilled in the art can obtain other drawings based on these drawings without creative efforts.

[0013] Figure 1 is a schematic structural view of the hydraulic shock absorber for a bicycle saddle in a specific embodiment of the present utility model. Specific Embodiments

[0014] The technical solutions in the embodiments of the present utility model will be described in detail below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative efforts shall fall within the protection scope of the present utility model.

[0015] Reference Figure 1As shown, the bicycle seat hydraulic shock absorber in this embodiment includes an outer cylinder 1, an inner cylinder 2, and a piston rod 3. A first cavity 4 and a second cavity 5 are respectively provided on the facing end faces of the outer cylinder 1 and the inner cylinder 2. The piston rod 3 is fixed to the bottom surface of the first cavity 4. A third cavity 6 is recessed on the end face of the piston rod 3 facing the inner cylinder 2. The end of the inner cylinder 2 facing the first cavity 4 is movable and disposed in the first cavity 4, and the end of the piston rod 3 facing the second cavity 5 is movable and disposed in the second cavity 5. The end of the inner cylinder 2 facing the second cavity 5 is provided with an annular flange 7 surrounding the piston rod 3, and the end of the piston rod 3 in the second cavity 5 is provided with an annular protrusion that abuts against the inner cylinder 2. A platform 8 is formed by clamping a first space 9 between the inner wall 1 of the outer cylinder, the bottom of the first cavity 4, the outer wall of the piston rod 3, and the annular flange 7. A second space 10 is formed by clamping the inner wall of the inner cylinder 2, the outer wall of the piston rod 3, the annular boss 8, and the annular flange 7. The inner wall of the third cavity 6 is provided with a first through hole 11 and a second through hole 12 that communicate with the first space 9 and the second space 10, respectively. A first spring 13 is fixed inside the third cavity 6. The end of the first spring 13 that is not connected to the third cavity 6 is fixedly connected to the annular boss 8. A second spring 14 is provided inside the second space 10. The two ends of the second spring 14 are fixedly connected to the annular boss 8 and the annular flange 7, respectively.

[0016] Furthermore, a dust cover 15 is fixed to the end of the first cavity 4.

[0017] Furthermore, an oil seal 16 is fixed on the inner wall of the outer cylinder 1, which abuts against the outer wall of the inner cylinder 2.

[0018] Furthermore, the outer wall of the annular boss 8 is provided with a piston ring 17 that abuts against the inner wall of the inner cylinder 2.

[0019] Furthermore, a cushioning pad 18 is fixed to the bottom surface of the first space 9.

[0020] In this technical solution, the first spring is gradually compressed and generates a reaction force. When the shock absorber is compressed to near its shortest length, the buffer pad is compressed, generating a large anti-compression reaction force to prevent the shock absorber from compressing further. When the seat shock absorber is compressed, the combined reaction force of the first spring, the internal pressure (the internal pressure generated by the compression of the internal gas after the shock absorber is compressed), and the buffer pad exceeds the compression force of the shock absorber, the shock absorber stops compressing and rebounds. When the spring reaction force of the shock absorber is less than the load of the shock absorber (or when the shock absorber rebounds to near its longest length, the second spring is compressed, generating a large anti-elongation reaction force), the shock absorber stops elongating. This continuous cycle of compression and elongation forms the shock absorption, thereby achieving a more direct shock absorption effect and allowing the rider to obtain a more comfortable riding experience.

[0021] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes the element.

[0022] The above are merely specific embodiments of this application. It should be noted that those skilled in the art can make several improvements and modifications without departing from the principles of this application, and these improvements and modifications should also be considered within the scope of protection of this application.

Claims

1. A hydraulic shock absorber for bicycle seats, characterized in that: The device includes an outer cylinder, an inner cylinder, and a piston rod. The outer and inner cylinders have a first cavity and a second cavity respectively on their opposing end faces. The piston rod is fixed to the bottom surface of the first cavity. A third cavity is recessed on the end face of the piston rod facing the inner cylinder. The end of the inner cylinder facing the first cavity is movable within the first cavity, and the end of the piston rod facing the second cavity is movable within the second cavity. The end of the inner cylinder facing the second cavity has an annular flange surrounding the piston rod. The end of the piston rod in the second cavity has an annular boss that abuts against the inner cylinder. A first space is sandwiched between the inner wall of the cylinder, the bottom of the first cavity, the outer wall of the piston rod, and the annular flange. A second space is sandwiched between the inner wall of the inner cylinder, the outer wall of the piston rod, the annular boss, and the annular flange. The inner wall of the third cavity is provided with a first through hole and a second through hole that communicate with the first space and the second space, respectively. A first spring is fixed in the third cavity. The end of the first spring that is not connected to the third cavity is fixedly connected to the annular boss. A second spring is provided in the second space. The two ends of the second spring are fixedly connected to the annular boss and the annular flange, respectively.

2. The hydraulic shock absorber for bicycle seats according to claim 1, characterized in that: A dust cover is fixed to the end of the first cavity.

3. A hydraulic shock absorber for bicycle seats according to claim 1, characterized in that: An oil seal is fixed on the inner wall of the outer cylinder, which abuts against the outer wall of the inner cylinder.

4. A hydraulic shock absorber for bicycle seats according to claim 1, characterized in that: The outer wall of the annular boss is provided with a piston ring that abuts against the inner wall of the inner cylinder.

5. A hydraulic shock absorber for bicycle seats according to claim 1, characterized in that: A cushioning pad is fixed to the bottom surface of the first space.

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