Pedal spindle assembly and bicycle pedal

By adopting an integrated bearing structure of the shaft core and outer ring unit in bicycle pedals, the problem of ball bearings being scattered during disassembly and assembly is solved, achieving efficient disassembly and simplified processing, and reducing costs.

WO2026158110A1PCT designated stage Publication Date: 2026-07-30XIAMEN ZHIXINREN INTELLIGENT TECHNOLOGY CO LTD
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Patent Information

Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
XIAMEN ZHIXINREN INTELLIGENT TECHNOLOGY CO LTD
Filing Date
2026-01-14
Publication Date
2026-07-30

AI Technical Summary

Technical Problem

The ball bearings of existing bicycle pedal clips are prone to disintegration during disassembly and assembly, resulting in high assembly skill requirements, long assembly time, and complex and costly processing.

Method used

The bearing adopts an integrated shaft core and outer ring unit structure, and the balls are always kept between the outer ring groove and the inner ring groove. Disassembly only requires separating the bushing and the threaded sleeve, and no position adjustment is required during assembly, simplifying the processing technology.

Benefits of technology

It improves disassembly and assembly efficiency, reduces processing difficulty and cost, simplifies processing technology, ensures that the balls do not separate, and facilitates maintenance.

✦ Generated by Eureka AI based on patent content.

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Abstract

A pedal spindle assembly and a bicycle pedal. The pedal spindle assembly comprises a spindle core rotation unit and a spindle sleeve. The spindle core rotation unit comprises a spindle core and a rotary connection mechanism rotatably sleeved outside the spindle core, the rotary connection mechanism being detachably and fixedly connected to the spindle sleeve. The spindle sleeve is provided with an inner cavity, wherein the spindle core is partially arranged inside the inner cavity of the spindle sleeve and rotates with respect to same, while the portion of the spindle core outside the spindle sleeve is provided with a connector for connecting to a crank. The rotary connection mechanism comprises an outer ring unit and a plurality of rolling bodies, wherein the outer ring unit is detachably and fixedly connected in an opening of the spindle sleeve, the outer ring unit is provided with an outer ring groove, the spindle core is provided with an inner ring groove, and the plurality of rolling bodies are arranged between the spindle core and the outer ring unit to form an integrated rotation structure, so that during disassembly and maintenance of the pedal spindle, each rolling body is always retained in a raceway formed by cooperation of the spindle core and outer ring unit. With respect to the pedal spindle assembly, during disassembly and maintenance, it is only necessary to detach the spindle sleeve from the threaded sleeve and the balls do not become scattered, thereby facilitating maintenance and repair and achieving a low manufacturing cost.
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Claims

1. A pedal shaft assembly, characterized in that: It includes a shaft core rotating unit and a bushing. The shaft core rotating unit includes a shaft core and a rotating connection mechanism that is rotated and sleeved outside the shaft core. The rotating connection mechanism and the bushing are detachably fixedly connected. The bushing has an inner cavity, the shaft core portion is placed in the inner cavity of the bushing and rotates relative to it, and the portion of the shaft core outside the bushing has a connector for connecting a crank. The rotary connection mechanism includes an outer ring unit and multiple rolling elements. The outer ring unit is detachably fixedly connected to the opening of the bushing. The outer ring unit is provided with an outer ring groove, and the shaft core is provided with an inner ring groove. Multiple rolling elements are placed between the shaft core and the outer ring unit to form a combined rotating structure. During the disassembly and maintenance of the pedal shaft, each rolling element always remains within the track formed by the cooperation between the shaft core and the outer ring unit.

2. The pedal shaft assembly according to claim 1, characterized in that: The inner ring groove is directly formed on the outer wall of the shaft core.

3. The pedal shaft assembly of claim 1, wherein: The outer ring unit is a threaded sleeve, and the outer ring groove is directly formed on the circumferential inner wall of the threaded sleeve.

4. The pedal shaft assembly of claim 3, wherein: The bushing has an inwardly facing opening with a right-angled annular platform. The threaded sleeve includes a connected threaded part and an unloading part. The unloading part is used to cooperate with an unloading tool. The right-angled annular platform is threadedly connected to the threaded part of the threaded sleeve.

5. The pedal shaft assembly according to claim 1, characterized in that: The outer ring unit includes a threaded sleeve and an outer ring seat, and the outer ring groove is directly formed on the circumferential inner wall of the outer ring seat.

6. The pedal shaft assembly according to claim 5, characterized in that: The outer ring seat is clamped and fixed between the threaded sleeve and the bushing.

7. The pedal shaft assembly according to claim 1, characterized in that: The rolling elements between the shaft core and the outer ring unit are fully fitted. One side of the outer ring groove and one side of the inner ring groove are respectively provided with corresponding notches to assemble the rolling elements and form a fully fitted structure.

8. The pedal shaft assembly according to claim 1, characterized in that: The shaft rotation unit also includes an inner ring seat that is detachably fixed on the shaft, and the inner ring groove is directly formed on the outer wall of the inner ring seat.

9. The pedal shaft assembly according to claim 8, characterized in that: The shaft core is externally detachably fixed with a limiting component. The limiting component is located on the side of the inner ring seat away from the joint and is used to block and limit the inner ring seat.

10. The pedal shaft assembly according to claim 9, characterized in that: The limiting component is a limiting snap ring, and the outer side of the shaft core is provided with an annular groove. The limiting snap ring is fixedly installed in the annular groove.

11. The pedal shaft assembly according to claim 1, characterized in that: The outer ring groove on the outer ring unit and the inner ring groove on the shaft core cooperate to form a track. The outer ring groove on the outer ring unit has a stop part to keep the balls in the track after assembly.

12. The pedal shaft assembly according to claim 1, characterized in that: A sealing ring is provided between the shaft core and the outer ring unit. The shaft core is provided with a sealing ring groove for fitting the sealing ring. The sealing ring groove is located on the side of the inner ring groove near the joint.

13. The pedal shaft assembly according to claim 12, characterized in that: The sealing ring has a first blocking part and a second blocking part. The first blocking part forms a bowl-shaped sealing ring part, and an annular recess is formed between the first blocking part and the second blocking part, which together with the outer ring unit on the outside forms an isolation cavity.

14. The pedal shaft assembly according to claim 1, characterized in that: The end of the shaft core located inside the bushing is fitted with a bearing, which cooperates with the bushing to form a rotation fulcrum.

15. A bicycle pedal, comprising the pedal shaft assembly as described in any one of claims 1 to 14 and a mating pedal body.