A type of bicycle seat post with shock absorption

Abstract

This case relates to a bicycle seatpost with shock absorption, including a front stem, an upper connecting plate, a lower connecting plate, and a rear connecting plate. The front stem includes a mounting tube and a front connecting plate. The front connecting plate, upper connecting plate, lower connecting plate, and rear connecting plate form a four-bar linkage assembly. It also includes a first shock-absorbing assembly disposed between the front connecting plate and the upper connecting plate, and a second shock-absorbing assembly disposed between the front connecting plate and the lower connecting plate. The first shock-absorbing assembly and the second shock-absorbing assembly are rotatably connected to the front connecting plate. Through the reasonable arrangement of the four-bar linkage assembly and the dual shock-absorbing assembly, effective absorption and buffering of impacts from the ground during riding is achieved.

Description

Technical Field

[0001] This application relates to the field of bicycle technology, specifically to a bicycle seat post technology. Background Technology

[0002] Traditional bicycle seats are typically connected directly to the frame via a straight tube structure. This design, especially during actual riding on rough roads or long rides, transmits most of the road bumps directly to the rider, affecting riding comfort.

[0003] To address this, existing technologies have incorporated bicycle seatposts with spring structures. While this improvement can mitigate vertical vibrations to some extent, it lacks effective measures to alleviate rollover vibrations from the front and rear. When riders encounter complex road conditions, such as continuous potholes, rocks, or jumps encountered while mountain biking, they still experience significant impact and discomfort, limiting its applicability and effectiveness. Furthermore, racing-grade air spring suspension systems are expensive and difficult to install, resulting in low adoption rates.

[0004] Therefore, developing a bicycle seatpost that can effectively absorb vibrations from all directions while being easy to install has become a research direction for those skilled in the art. Summary of the Invention

[0005] To address the aforementioned problems, this application proposes a bicycle seatpost with shock absorption, which aims to improve multi-directional shock absorption while increasing installation efficiency through a reasonable layout of the seatpost's mounting structure and shock absorption devices.

[0006] To achieve the above objectives, the present application adopts the following technical solution:

[0007] A bicycle seatpost with shock absorption includes a front stem, an upper connecting plate, a lower connecting plate, and a rear connecting plate. The front stem includes a mounting tube and a front connecting plate. The front connecting plate is rotatably connected to the upper connecting plate and the lower connecting plate. The rear connecting plate is rotatably connected to the upper connecting plate and the lower connecting plate. The front connecting plate, the upper connecting plate, the lower connecting plate, and the rear connecting plate constitute a four-bar linkage assembly.

[0008] It also includes a first shock-absorbing assembly disposed between the front connecting plate and the upper connecting plate, and a second shock-absorbing assembly disposed between the front connecting plate and the lower connecting plate, wherein the first shock-absorbing assembly and the second shock-absorbing assembly are rotatably connected to the front connecting plate.

[0009] Thus, through the rationally designed four-bar linkage and dual shock-absorbing components, effective absorption and buffering of ground impacts during riding are achieved. The front connecting plate, upper connecting plate, lower connecting plate, and rear connecting plate in this structure form a four-bar linkage, allowing for flexible multi-directional movement under external forces. Regarding the shock absorption system, the first shock-absorbing component is positioned between the front and upper connecting plates, and the second shock-absorbing component is positioned between the front and lower connecting plates. Both shock-absorbing components are rotatably connected to the front connecting plate. This layout, combined with the four-bar linkage structure, not only enhances the system's dynamic response but also effectively disperses vibration loads in different directions, avoiding fatigue damage caused by concentrated stress at a single shock-absorbing point, and better adapting to complex road conditions while improving riding comfort.

[0010] In some possible implementations, the mounting tube and the front connecting plate are integrally formed.

[0011] In some possible implementations, the rotatable connection structure between the front connecting plate and the upper connecting plate and the lower connecting plate, and the rotatable connection structure between the rear connecting plate and the upper connecting plate and the lower connecting plate, include an upper horizontal pin passing through the front connecting plate, the upper connecting plate, the lower connecting plate, and the rear connecting plate, and bearings disposed at both axial ends of the upper horizontal pin.

[0012] In some possible implementations, the upper connecting plate has a first holding portion in its middle that can apply pressure to the first shock-absorbing assembly.

[0013] In some possible implementations, the first shock-absorbing assembly includes an upper spring guide sleeve that is pressed by the first holding part, an upper spring guide rod that is rotatably connected to the front connecting plate at the other end, and an upper spring pad, an upper spring guide pin, and an upper spring that are sequentially arranged between the upper spring guide rod and the upper spring guide sleeve.

[0014] In some possible implementations, the lower connecting plate has a second holding portion at its rear end that can apply pressure to the second shock-absorbing assembly, and the second holding portion has an adjustment hole.

[0015] In some possible implementations, the second shock absorber assembly includes a lower spring guide sleeve that is pressed by the second holding part, a lower spring guide rod that is rotatably connected to the front connecting plate at the other end, and a lower spring seat and a lower spring that are sequentially arranged between the lower spring guide rod and the lower spring guide sleeve;

[0016] It also includes an adjusting screw that passes through the adjusting hole from the outside of the second holding part to tighten the lower spring guide rod, and a pre-tightening flat washer disposed on the outside of the second holding part and penetrated by the adjusting screw.

[0017] In some possible implementations, a lower preload spring pad disposed inside the preload flat pad is also included.

[0018] In some possible implementations, the rotatable connection structure between the front connecting plate and the lower spring guide rod includes a lower cross pin passing through the front connecting plate and the lower spring guide rod, and a bearing disposed in the middle of the lower cross pin.

[0019] In some possible implementations, the bearing is a self-lubricating plastic bushing made of engineering plastic. Attached Figure Description

[0020] Figure 1 This is a side view of the bicycle seatpost with the shock absorber installed according to this application;

[0021] Figure 2 This is an oblique view of the bicycle seatpost used in this application;

[0022] Figure 3 This is a side view of the bicycle seatpost used in this application;

[0023] Figure 4 yes Figure 3 Sectional view along the BB direction;

[0024] Figure 5 yes Figure 3 C-axis sectional view;

[0025] Figure 6 This is an exploded schematic diagram of the bicycle shock absorber seat post of this application;

[0026] Figure 7 This is a schematic diagram of the upper connecting plate in this application;

[0027] Figure 8 This is a schematic diagram of the rear connecting plate in this application;

[0028] Figure 9 This is a schematic diagram of the lower connecting plate in this application;

[0029] Figure 10 yes Figure 2 A magnified view of a portion of point A in the middle. Detailed Implementation

[0030] The following examples further illustrate the features of this application and other related features in detail, so as to facilitate understanding by those skilled in the art:

[0031] It should be noted that the terms “front,” “back,” “left,” “right,” “up,” and “down” used in the following description refer to the directions in the attached diagrams, while the terms “bottom surface,” “top surface,” “inner,” and “outer” refer to the directions toward or away from the geometric center of a specific component, respectively.

[0032] Furthermore, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this case based on the specific circumstances.

[0033] Please refer to Figure 1 and Figure 2 The upper end of the bicycle seatpost 100 of this application is fitted with a saddle 200, and its lower end is fitted with a seatpost clamp or seatpost bundle of the bicycle. Please refer to the following description in this embodiment: Figure 6 Explosion diagram. To facilitate installation with the saddle 200, an installation assembly 300 is pre-installed, which specifically includes an upper saddle clamp 310 and a lower saddle clamp 320 that can clamp the saddle 200 from above and below. The lower saddle clamp 320 is fixed to the upper end of the shock absorber seat tube 100, specifically by a fixing bolt 400 (all bolts used for fixing in the figure are labeled with this number) passing through the saddle clamp washer 330, the lower saddle clamp 320, and the upper saddle clamp 310, and tightened with a nut. The nut and the washer used are standard industry techniques and will not be described in detail here. At this time, since the saddle 200 is not included at the factory, a wooden pin 340 and a tower-shaped spring 350 are pre-installed between the upper saddle clamp 310 and the lower saddle clamp 320 to keep it in an installable state.

[0034] Please refer to the reference. Figures 2 to 5 The bicycle seatpost 100 of this application includes a front stem 1, an upper connecting plate 2, a lower connecting plate 3, and a rear connecting plate 4. The front stem 1 includes a mounting tube 11 and a front connecting plate 12. The material can be aluminum alloy or carbon fiber. Preferably, the mounting tube 11 and the front connecting plate 12 are integrally formed to enhance the overall stability after installation. The upper connecting plate 2, lower connecting plate 3, and rear connecting plate 4 are left-right snap-fit ​​structures, fixed by fixing bolts 400.

[0035] Furthermore, the front connecting plate 12 is rotatably connected to the upper connecting plate 2 and the lower connecting plate 3, respectively, and the rear connecting plate 4 is rotatably connected to the upper connecting plate 2 and the lower connecting plate 3, respectively. At this time, the front connecting plate 12, the upper connecting plate 2, the lower connecting plate 3, and the rear connecting plate 4 constitute a four-bar linkage assembly.

[0036] Specifically, the rotatable connection structure between the front connecting plate 12 and the upper connecting plate 2 and the lower connecting plate 3, and the rotatable connection structure between the rear connecting plate 4 and the upper connecting plate 2 and the lower connecting plate 3, include an upper horizontal pin 91 passing through the front connecting plate 12, the upper connecting plate 2, the lower connecting plate 3, and the rear connecting plate 4, and bearings 92 disposed at both axial ends of the upper horizontal pin 91. Preferably, the bearings 92 are engineering plastic bearings, which are self-lubricating plastic bushings with advantages such as durability, water resistance, light weight, and no need for additional lubrication.

[0037] A common implementation method is as follows, please refer to the reference. Figures 7 to 9 The front connecting plate 12 and the rear connecting plate 4 are respectively provided with shaft hole ribs 93, while the corresponding upper connecting plate 2 and lower connecting plate 3 are provided with bearing mounting holes 94. This bearing mounting method is a common technical means in the industry, and will not be described in detail.

[0038] Furthermore, it also includes a first damping assembly 5 disposed between the front connecting plate 12 and the upper connecting plate 2, and a second damping assembly 6 disposed between the front connecting plate 12 and the lower connecting plate 3. The first damping assembly 5 and the second damping assembly 6 are rotatably connected to the front connecting plate 12.

[0039] For specific implementation details, please refer to the reference. Figure 4 , Figure 5 and Figure 7 The upper connecting plate 2 has a first holding part 21 in its middle, which can apply pressure to the first shock-absorbing component 5. The first holding part 21 is integrally formed on the upper connecting plate 2, and forms an arc-shaped stable holding structure after being fastened. The first shock-absorbing component 5 includes an upper spring guide sleeve 51 that is pressed by the first holding part 21, an upper spring guide rod 52 that is rotatably connected to the front connecting plate 12 at the other end, and an upper spring pad 53, an upper spring guide pin 54, and an upper spring 55 arranged sequentially between the upper spring guide rod 52 and the upper spring guide sleeve 51. In some embodiments, the upper end of the upper spring guide sleeve 51 is embedded in the first holding part 21 for fixation.

[0040] In application, the upper spring 55 is fitted onto the upper spring guide pin 54 and is clamped and stressed by the upper spring pad 53 and the upper spring guide sleeve 51. The upper spring guide rod 52 is connected to the front connecting plate 12 and has a semi-circular swing lug 521. The swing lug 521 rotates on the upper horizontal pin 91 of the lower connecting plate 3. Thus, combined with the pressure applied by the first holding part 21 located in the middle of the upper connecting plate 2 as described above, a lever-type shock absorption device is formed, which effectively disperses vibration loads in different directions.

[0041] Please refer to the reference. Figure 4 , Figure 5 and Figure 9 , Figure 10The lower connecting plate 3 has a second holding part 31 at its rear end, which can apply pressure to the second shock-absorbing component 6. The second holding part 31 is integrally formed on the lower connecting plate 3, and after being fastened, it forms an arc-shaped stable holding structure. The second holding part 31 is provided with an adjustment hole 311.

[0042] Furthermore, the second shock-absorbing assembly 6 includes a lower spring guide sleeve 61 that is pressed by the second holding part 31, a lower spring guide rod 62 that is rotatably connected to the front connecting plate 12 at the other end, and a lower spring seat 63 and a lower spring 64 sequentially arranged between the lower spring guide sleeve 61 and the lower spring guide rod 62. The lower spring guide rod 62 passes through the lower spring seat 63.

[0043] Furthermore, it also includes an adjusting screw 65 that passes through the adjusting hole 311 from the outside of the second holding part 31 and tightens the lower spring guide rod 62, and a preload flat washer 66 disposed on the outside of the second holding part 31 and penetrated by the adjusting screw 65. Specifically, the lower spring guide rod 62 passes through the lower spring seat 63, and the adjusting screw 65 is threadedly connected to the lower spring guide rod 62. The preload of the spring is adjusted by tightening the adjusting screw 65. In use, the second shock absorption assembly 6 is at the lower end, and the rider's weight affects its vibration amplitude. The adjusting screw 65 is provided to adjust the preload of the lower spring 64 to meet the riding needs of riders of different weights.

[0044] As mentioned above, the second shock-absorbing component 6 is affected by body weight. To address this, a lower preload spring pad 67 is provided inside the preload flat pad 66. The lower preload spring pad 67 is an elastic washer that provides preload, prevents loosening, or provides cushioning.

[0045] The rotatable connection structure between the front connecting plate 12 and the lower spring guide rod 3 includes a lower horizontal pin 95 passing through the front connecting plate 12 and the lower spring guide rod 3, and a bearing 92 disposed in the middle of the lower horizontal pin 95. In one embodiment, a shaft head 621 is provided at the end of the lower spring guide rod 62 corresponding to the front connecting plate 12. The bearing 92 is embedded in the shaft head 621, and the shaft head 621 is held by the bearing seat 96 of the front connecting plate 12. The installation method of the shaft head 621 and the bearing seat 96 is a conventional technique in bearing 92 installation and will not be described in detail.

[0046] Thus, through the rationally designed four-bar linkage and dual shock-absorbing components, effective absorption and buffering of ground impacts during riding are achieved. The front connecting plate 12, upper connecting plate 2, lower connecting plate 3, and rear connecting plate 4 in this structure form a four-bar linkage, allowing for flexible multi-directional movement under external forces. Regarding the shock absorption system, the first shock-absorbing component 5 is positioned between the front connecting plate 12 and the upper connecting plate 2, and the second shock-absorbing component 6 is positioned between the front connecting plate 12 and the lower connecting plate 3. Both shock-absorbing components are rotatably connected to the front connecting plate 12. This layout, combined with the four-bar linkage structure, not only enhances the system's dynamic response but also effectively disperses vibration loads in different directions, avoiding fatigue damage caused by concentrated stress at a single shock-absorbing point, and better adapting to complex road conditions while improving riding comfort.

[0047] As stated above, this case protects a bicycle seat post with shock absorption, and all technical solutions that are the same as or similar to this case should be considered to fall within the scope of protection of this case.

Claims

1. A shock absorbing seat tube for a bicycle, characterized in that The assembly includes a front riser (1), an upper connecting plate (2), a lower connecting plate (3), and a rear connecting plate (4). The front riser (1) includes an installation pipe (11) and a front connecting plate (12). The front connecting plate (12) is rotatably connected to the upper connecting plate (2) and the lower connecting plate (3), respectively. The rear connecting plate (4) is rotatably connected to the upper connecting plate (2) and the lower connecting plate (3), respectively. The front connecting plate (12), the upper connecting plate (2), the lower connecting plate (3), and the rear connecting plate (4) constitute a four-bar linkage assembly. It also includes a first shock absorber assembly (5) disposed between the front connecting plate (12) and the upper connecting plate (2) and a second shock absorber assembly (6) disposed between the front connecting plate (12) and the lower connecting plate (3), wherein the first shock absorber assembly (5) and the second shock absorber assembly (6) are rotatably connected to the front connecting plate (12).

2. A shock absorbing seat tube for a bicycle as defined in claim 1, characterized in that The mounting tube (11) and the front connecting plate (12) are integrally formed structures.

3. A shock absorbing seat tube for a bicycle as defined in claim 1, wherein The rotatable connection structure between the front connecting plate (12) and the upper connecting plate (2) and the lower connecting plate (3), and the rotatable connection structure between the rear connecting plate (4) and the upper connecting plate (2) and the lower connecting plate (3) includes an upper horizontal pin (91) that passes through the front connecting plate (12), the upper connecting plate (2), the lower connecting plate (3) and the rear connecting plate (4) and bearings (92) disposed at both ends of the upper horizontal pin (91) in the axial direction.

4. A shock absorbing seat tube for a bicycle as defined in claim 1, wherein The upper connecting plate (2) has a first holding part (21) in its middle that can apply pressure to the first shock absorber (5).

5. A shock absorbing seat tube for a bicycle as defined in claim 4, characterized in that The first shock absorber assembly (5) includes an upper spring guide sleeve (51) that is pressed by the first holding part (21), an upper spring guide rod (52) that is rotatably connected to the front connecting plate (12) at the other end, and an upper spring pad (53), an upper spring guide pin (54), and an upper spring (55) arranged sequentially between the upper spring guide rod (52) and the upper spring guide sleeve (51).

6. A bicycle seatpost for shock absorption as described in claim 1, characterized in that, The lower connecting plate (3) has a second holding part (31) at its rear end that can apply pressure to the second shock absorber (6), and the second holding part (31) has an adjustment hole (311).

7. A shock absorbing seat tube for a bicycle as defined in claim 6, characterized in that The second shock absorber assembly (6) includes a lower spring guide sleeve (61) that is pressed by the second holding part (31), a lower spring guide rod (62) that is rotatably connected to the front connecting plate (12) at the other end, and a lower spring seat (63) and a lower spring (64) arranged sequentially between the lower spring guide rod (62) and the lower spring guide sleeve (61). It also includes an adjusting screw (65) that passes through the adjusting hole (311) from the outside of the second holding part (31) to tighten the lower spring guide rod (62), and a pre-tightening flat washer (66) that is provided on the outside of the second holding part (31) and is penetrated by the adjusting screw (65).

8. A shock absorbing seat tube for a bicycle as defined in claim 7, characterized in that It also includes a lower preload spring pad (67) disposed inside the preload flat pad (66).

9. A shock absorbing seat tube for a bicycle as defined in claim 7, wherein The rotatable connection structure of the front connecting plate (12) and the lower spring guide rod (62) includes a lower cross pin (95) passing through the front connecting plate (12) and the lower spring guide rod (62) and a bearing (92) disposed in the middle of the lower cross pin (95).

10. A shock absorbing seat tube for a bicycle as claimed in any one of claims 3 or 9, wherein, The bearing (92) is a self-lubricating plastic bushing made of engineering plastic material.

Images