Bicycle seat tube
By introducing a multi-keyway anti-rotation structure and a shortened spring design into the bicycle seatpost, the problems of seatpost rotation and low space utilization have been solved, resulting in higher performance and reliability while reducing costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- JIANGSU SAFORT METAL PROD CO LTD
- Filing Date
- 2025-05-16
- Publication Date
- 2026-05-12
AI Technical Summary
The rotational instability of bicycle seatposts during riding includes relative rotation caused by the lack of an effective anti-rotation structure between the outer and inner tubes, as well as problems such as low space utilization and high cost.
It adopts a variety of innovative multi-keyway anti-rotation structures and spring component reduction designs. Through the combination of aluminum cap and sliding sleeve body, combined with the snap-fit structure of limit groove and convex strip, it prevents seat tube rotation and reduces the overall height by shortening the spring length.
It effectively prevents seatpost rotation, improves space utilization, reduces costs, and enhances riding comfort and safety.
Smart Images
Figure CN224225190U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of bicycle seatposts, and in particular relates to a bicycle seatpost. Background Technology
[0002] The bicycle seatpost is a crucial component connecting the frame and saddle. It not only supports the rider's weight but also affects riding comfort and safety. Currently, bicycle seatposts have the following drawbacks:
[0003] The lack of an effective anti-rotation structure between the outer and inner tubes results in an average relative rotation of 3-5° per kilometer during riding; low space utilization: the length of existing springs generally exceeds 80mm, which increases the overall height of the seat post by 15%-20%, and also increases costs. Utility Model Content
[0004] In view of this, the present invention aims to provide a bicycle seat post to solve at least one of the problems existing in the prior art.
[0005] To achieve the above objectives, the technical solution of this utility model is implemented as follows:
[0006] A bicycle seatpost includes a connecting assembly and a seatpost assembly. The top of the seatpost assembly is mounted to the bicycle via the connecting assembly. The seatpost assembly includes an aluminum tube. The upper end of the aluminum tube is mounted to the connecting assembly via a corrugated tube. A connecting shaft is nested inside the upper end of the aluminum tube, and the upper end of the connecting shaft passes through the corrugated tube and is mounted to the connecting assembly. The lower end of the connecting shaft is nested to a connecting shaft sleeve, and the lower end of the connecting shaft is connected to a spring. A heat shrink tubing is installed on the outside of the spring, and the bottom of the spring is mounted to a positioning post.
[0007] Furthermore, the connecting assembly includes an aluminum head, the bottom of which is connected to the connecting shaft and the upper end of the bellows, the top of which is installed on the lower clamping plate, and an upper clamping plate is installed above the lower clamping plate. A locking screw passes through the aluminum head, the lower clamping plate, and the upper clamping plate and is installed on the clamping plate aluminum nut.
[0008] Furthermore, the seat tube assembly also includes an aluminum cap, a sliding sleeve body, and an oil seal ring. The oil seal ring, the sliding sleeve body, and the aluminum cap are sequentially fitted at the connection between the connecting shaft sliding sleeve and the connecting shaft from bottom to top.
[0009] Furthermore, the seat post assembly also includes a washer and a sliding sleeve locking screw. The lower end of the connecting shaft passes through the washer and connects to the sliding sleeve locking screw. Both the washer and the sliding sleeve locking screw are connected to the upper end of the spring component to limit the upper end of the spring component.
[0010] Furthermore, the seat tube assembly also includes a fine-tuning aluminum nut and a label, with the bottom of the positioning post installed to the fine-tuning aluminum nut and the label installed on the bottom of the fine-tuning aluminum nut.
[0011] Furthermore, the seat tube assembly also includes an O-ring, through which the top of the aluminum tube is mounted to the bellows.
[0012] Furthermore, limit grooves are respectively opened on the upper and lower sides of the bottom end of the connecting shaft, and the limit grooves are used in conjunction with the sliding sleeve of the connecting shaft.
[0013] Furthermore, the aluminum tube has an internal thread at the bottom and an external thread at the top. The bottom of the aluminum tube is connected to the fine-tuning aluminum nut through the internal thread, and the top of the aluminum tube is connected to the corrugated pipe through the external thread. A convex strip is provided on the upper and lower sides of the inner wall of the aluminum tube, and the convex strip is used in conjunction with the connecting shaft sleeve.
[0014] Furthermore, the upper and lower sides of the outer side of the connecting shaft sleeve are respectively provided with a groove, which is used in conjunction with the protrusion. The upper and lower sides of the inner side of the connecting shaft sleeve are respectively provided with a planar structure, which is used in conjunction with the limiting groove.
[0015] Compared with the prior art, the bicycle seatpost of this utility model has the following advantages:
[0016] This utility model describes a bicycle seatpost that, through an innovative multi-keyway anti-rotation structure and a shortened spring length, successfully solves the technical problems of traditional seatposts being prone to rotation and having excessive length. This bicycle seatpost enables the product to combine high performance and high reliability, making it highly practical. Attached Figure Description
[0017] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of the utility model. The illustrative embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an undue limitation of the utility model. In the drawings:
[0018] Figure 1 This is a schematic diagram of the overall structure as described in an embodiment of the present utility model;
[0019] Figure 2 This is an exploded view of the overall structure described in an embodiment of the present utility model;
[0020] Figure 3 This is a cross-sectional view of the overall structure as described in an embodiment of the present utility model;
[0021] Figure 4 This is a schematic diagram of the aluminum tube described in an embodiment of the present utility model;
[0022] Figure 5 This is a front view schematic diagram of the aluminum tube described in an embodiment of the present utility model;
[0023] Figure 6 This is a schematic diagram of the connecting shaft sleeve according to an embodiment of the present utility model;
[0024] Figure 7 This is a schematic diagram from another perspective of the connecting shaft sleeve described in an embodiment of this utility model;
[0025] Figure 8 This is a schematic diagram of the connecting shaft according to an embodiment of the present utility model;
[0026] Figure 9 This is another external view of the overall structure described in an embodiment of the present utility model.
[0027] Explanation of reference numerals in the attached figures:
[0028] 1. Aluminum head; 2. Aluminum tube; 21. Raised strip; 3. Lower clamping plate; 4. Upper clamping plate; 5. Clamping plate aluminum nut; 6. Corrugated tube; 7. Connecting shaft; 71. Limiting groove; 8. Aluminum cap; 9. Sliding sleeve body; 10. Oil seal ring; 11. Locking screw; 12. Connecting shaft sliding sleeve; 121. Groove; 122. Flat structure; 13. Washer; 14. Sliding sleeve locking screw; 15. Spring component; 16. Positioning pin component; 17. Fine-tuning aluminum nut; 18. Heat shrink tubing; 19. Label; 20. O-ring. Detailed Implementation
[0029] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.
[0030] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.
[0031] In the description of this invention, it should be noted that, unless otherwise explicitly 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 mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.
[0032] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.
[0033] like Figures 1 to 8 As shown, a bicycle seatpost includes a connecting assembly and a seatpost assembly. The top of the seatpost assembly is mounted to the bicycle via the connecting assembly. The seatpost assembly includes an aluminum tube 2, the upper end of which is mounted to the connecting assembly via a corrugated tube 6. A connecting shaft 7 is nested inside the upper end of the aluminum tube 2, and the upper end of the connecting shaft 7 passes through the corrugated tube 6 and is mounted to the connecting assembly. The lower end of the connecting shaft 7 is nested to a connecting shaft sleeve 12, and the lower end of the connecting shaft 7 is connected to a spring member 15. A heat shrink tubing 18 is installed on the outside of the spring member 15, and the bottom of the spring member 15 is mounted to a positioning post member 16. This bicycle seatpost successfully solves the technical problems of traditional seatposts being prone to rotation and having a long length through an innovative multi-keyway anti-rotation structure and a shortened spring length. This bicycle seatpost enables the product to have both high performance and high reliability, and is highly practical.
[0034] In a preferred embodiment of this utility model, the connecting assembly includes an aluminum head 1. The bottom of the aluminum head 1 is connected to the connecting shaft 7 and the upper end of the bellows 6. The top of the aluminum head 1 is installed to the lower clamping plate 3, and an upper clamping plate 4 is installed above the lower clamping plate 3. A locking screw 11 passes through the aluminum head 1, the lower clamping plate 3, and the upper clamping plate 4 and is installed to the clamping plate aluminum nut 5. In this embodiment, the bicycle is installed using the locking screw 11, the aluminum head 1, the lower clamping plate 3, and the upper clamping plate 4.
[0035] In a preferred embodiment of this utility model, the seat tube assembly further includes an aluminum cap 8, a sliding sleeve body 9, and an oil seal ring 10. The oil seal ring 10, the sliding sleeve body 9, and the aluminum cap 8 are sequentially fitted from bottom to top at the connection point between the connecting shaft sliding sleeve 12 and the connecting shaft 7. In this embodiment,
[0036] In a preferred embodiment of this utility model, the seat post assembly further includes a washer 13 and a sliding sleeve locking screw 14. The lower end of the connecting shaft 7 passes through the washer 13 and connects to the sliding sleeve locking screw 14. Both the washer 13 and the sliding sleeve locking screw 14 are connected to the upper end of the spring member 15 to limit the upper end of the spring member 15. In this embodiment, the sliding sleeve locking screw 14 is used to position the spring member 15.
[0037] In a preferred embodiment of this utility model, the seat tube assembly further includes a fine-tuning aluminum nut 17 and a label 19. The bottom of the positioning post 16 is mounted to the fine-tuning aluminum nut 17, and the label 19 is mounted on the bottom of the fine-tuning aluminum nut 17. In this embodiment, the fine-tuning aluminum nut 17 is used to position the aluminum tube 2, and the label 19 is used for labeling at the production plant.
[0038] In a preferred embodiment of this invention, the seat tube assembly further includes an O-ring 20, and the top of the aluminum tube 2 is mounted to the corrugated pipe 6 via the O-ring 20. In this embodiment, the O-ring 20 is made of rubber.
[0039] In a preferred embodiment of this utility model, limiting grooves 71 are respectively formed on the upper and lower sides of the bottom end of the connecting shaft 7, and the limiting grooves 71 are used in conjunction with the connecting shaft sleeve 12. The aluminum tube 2 has an internal thread at the bottom and an external thread at the top. The bottom of the aluminum tube 2 is connected to the fine-tuning aluminum nut 17 through the internal thread, and the top of the aluminum tube 2 is connected to the bellows 6 through the external thread. A protrusion 21 is provided on the upper and lower sides of the inner wall of the aluminum tube 2, and the protrusion 21 is used in conjunction with the connecting shaft sleeve 12. A groove 121 is formed on the upper and lower sides of the outer side of the connecting shaft sleeve 12, and the groove 121 is used in conjunction with the protrusion 21. A planar structure 122 is provided on the upper and lower sides of the inner side of the connecting shaft sleeve 12, and the planar structure 122 is used in conjunction with the limiting groove 71. In this embodiment, the engagement of the limiting groove 71 with the connecting shaft sleeve 12 and the engagement of the groove 121 with the protrusion 21 can prevent rotation between the aluminum tube 2 and the connecting shaft sleeve 12, and between the connecting shaft sleeve 12 and the connecting shaft 7.
[0040] Example 1
[0041] like Figure 9 The diagram shown is another external structural diagram of the bicycle seat post. The bottom of the aluminum tube 2 of the bicycle seat post has an observation window with scale lines. For the specific structure of the observation window, please refer to the applicant's patent application number 2024115678069. The bicycle seat post has no corrugated tube 6 and no heat shrink tubing 18.
[0042] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A bicycle seatpost, characterized in that: The system includes a connecting assembly and a seat post assembly. The top of the seat post assembly is mounted to the bicycle via the connecting assembly. The seat post assembly includes an aluminum tube (2). The upper end of the aluminum tube (2) is mounted to the connecting assembly via a corrugated tube (6). The upper end of the aluminum tube (2) is nested inside a connecting shaft (7), and the upper end of the connecting shaft (7) passes through the corrugated tube (6) and is mounted to the connecting assembly. The lower end of the connecting shaft (7) is nested to a connecting shaft sleeve (12), and the lower end of the connecting shaft (7) is connected to a spring (15). A heat shrink tubing (18) is installed on the outside of the spring (15), and the bottom of the spring (15) is mounted to a positioning post (16).
2. The bicycle seatpost according to claim 1, characterized in that: The connecting assembly includes an aluminum head (1), the bottom of which is connected to the connecting shaft (7) and the upper end of the bellows (6), the top of which is installed to the lower clamping plate (3), and the upper clamping plate (4) is installed above the lower clamping plate (3). The locking screw (11) passes through the aluminum head (1), the lower clamping plate (3), and the upper clamping plate (4) and is installed to the clamping plate aluminum nut (5).
3. A bicycle seatpost according to claim 1, characterized in that: The seat tube assembly also includes an aluminum cap (8), a sliding sleeve body (9), and an oil seal ring (10). The oil seal ring (10), the sliding sleeve body (9), and the aluminum cap (8) are sequentially fitted at the connection between the connecting shaft sliding sleeve (12) and the connecting shaft (7) from bottom to top.
4. A bicycle seatpost according to claim 1, characterized in that: The seat tube assembly also includes a washer (13) and a sliding sleeve locking screw (14). The lower end of the connecting shaft (7) passes through the washer (13) and is connected to the sliding sleeve locking screw (14). The washer (13) and the sliding sleeve locking screw (14) are both connected to the upper end of the spring (15) to limit the upper end of the spring (15).
5. A bicycle seatpost according to claim 1, characterized in that: The seat tube assembly also includes a fine-tuning aluminum nut (17) and a label (19), the bottom of the positioning post (16) is installed to the fine-tuning aluminum nut (17), and the label (19) is installed at the bottom of the fine-tuning aluminum nut (17).
6. A bicycle seatpost according to claim 1, characterized in that: The seat tube assembly also includes an O-ring (20), and the top of the aluminum tube (2) is mounted to the bellows (6) via the O-ring (20).
7. A bicycle seatpost according to claim 1, characterized in that: Limiting grooves (71) are respectively opened on the upper and lower sides of the bottom end of the connecting shaft (7), and the limiting grooves (71) are used in conjunction with the connecting shaft sleeve (12).
8. A bicycle seatpost according to claim 6, characterized in that: The aluminum tube (2) has an internal thread at the bottom and an external thread at the top. The bottom of the aluminum tube (2) is connected to the fine-tuning aluminum nut (17) through the internal thread, and the top of the aluminum tube (2) is connected to the corrugated pipe (6) through the external thread. The aluminum tube (2) has a convex strip (21) on the upper and lower sides of the inner wall, and the convex strip (21) is used in conjunction with the connecting shaft sleeve (12).
9. A bicycle seatpost according to claim 8, characterized in that: The connecting shaft sleeve (12) has a groove (121) on the upper and lower sides of its exterior. The groove (121) is used in conjunction with the protrusion (21). The connecting shaft sleeve (12) has a planar structure (122) on the upper and lower sides of its interior. The planar structure (122) is used in conjunction with the limiting groove (71).