Labor-saving crank of bicycle
By installing pedal eccentric bearings on the bicycle crank, and using the eccentric design to lengthen the force arm length, the physical exhaust problem caused by standardization of the bicycle crank length is solved, and the effort-saving effect is achieved.
Patent Information
- Application Number
- CN202421786554.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-26
- Publication Date
- 2025-07-29
- Estimated Expiration
- 2034-07-26
AI Technical Summary
The standardization of existing bicycle crank lengths causes cyclists to consume a lot of physical strength when going uphill, which is especially inconvenient for children and the elderly. The increase in length violates the principles of human body mechanics.
The pedal eccentric mounting bearing is used to make the pedal eccentric mounted on the crank, and the length of the force arm is lengthened by the eccentric design to achieve labor-saving effect.
The eccentric bearing design increases the length of the arm during pedaling, reduces the cyclist's physical energy consumption, especially when going uphill.
Smart Images
Figure CN223161919U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of bicycles, in particular to a labor-saving crank for bicycles. Background Art
[0002] Bicycles are an indispensable means of transportation in low-carbon life, and even gave birth to many cycling enthusiasts.
[0003] [[ID=II]]The power of a bicycle comes from the human body. For children and the elderly, it is necessary to reduce their physical consumption during cycling, especially for the elderly. And when cycling uphill, the cyclist will be very strenuous.
[0004] Using the lever principle, increasing the length of the crank can achieve the purpose of labor-saving cycling. However, the length of the crank has been standardized. If the length is increased further, when the human body pedals, it will increase the movement range of the legs, which violates human mechanics. Therefore, it is necessary to improve this technical solution. Summary of the Utility Model
[0005] The purpose of the utility model is to provide a labor-saving crank for bicycles aiming at the defects of the prior art, including a crank and a pedal, and further comprising: a pedal eccentric mounting bearing, which is connected to the end of the crank, and is used for eccentrically mounting the pedal.
[0006] Further, the pedal eccentric mounting bearing is an eccentric bearing. Still further, the end of the crank is fixedly connected to the outer ring of the pedal eccentric mounting bearing. Even further, the inner ring of the pedal eccentric mounting bearing has an eccentric hole for mounting the pedal.
[0007] Further, the inner ring of the pedal eccentric mounting bearing is fixedly connected to the end of the crank. Still further, the inner ring of the pedal eccentric mounting bearing has a crank mounting member, and the inner ring is fixedly connected to the end of the crank through the crank mounting member. Still further, the outer ring of the pedal eccentric mounting bearing is used for fixedly connecting the pedal. Still further, the side surface of the outer ring of the pedal eccentric mounting bearing has a pedal mounting member for mounting the pedal.
[0008] Further, when the pedal eccentric mounting bearing is an eccentric pedal eccentric mounting bearing, the pedal eccentric mounting bearing has a plurality of eccentric holes, and the distances of the plurality of eccentric holes from the center of the inner ring are different.
[0009] The beneficial effects of the utility model are as follows:
[0010] The position of the pedal is eccentrically mounted on the pedal eccentric mounting bearing. When stepping forward from the highest position, the position of the pedal gradually becomes horizontal with the crank, which is equivalent to lengthening the length of the crank. That is to say, the length of the lever arm of the lever movement during pedaling is lengthened, so as to achieve the purpose of saving effort. Brief Description of the Drawings
[0011] Figure 1 It is a schematic structural diagram of Embodiment 1 of the present invention;
[0012] Figure 2 It is a schematic structural diagram of Embodiment 2 of the present invention;
[0013] Figure 3 It is a schematic diagram of the movement principle of Embodiment 1 of the present invention;
[0014] Figure 4 It is a schematic diagram of the movement principle of Embodiment 2 of the present invention;
[0015] Figure 5 It is a preferred schematic structural diagram of Embodiment 1 of the present invention.
[0016] Reference numerals: 1 - crank; 2 - pedal eccentric mounting bearing; 21 - outer ring; 211 - pedal mounting member; 22 - inner ring; 221 - eccentric hole; 222 - crank mounting member. Detailed Description of the Invention
[0017] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application clearer, the present application will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.
[0018] Embodiment 1
[0019] Refer to Figure 1 、 Figure 3 and Figure 5 , a labor-saving crank for a bicycle, including a crank 1, and further including: a pedal eccentric mounting bearing 2, the pedal eccentric mounting bearing 2 is connected to the end of the crank 1, and the pedal eccentric mounting bearing is used for eccentrically mounting the pedal.
[0020] The pedal eccentric mounting bearing 2 is an eccentric bearing. The end of the crank 1 is fixedly connected to the outer ring 21 of the pedal eccentric mounting bearing 2, and this fixed connection method can be welding. The inner ring 22 of the pedal eccentric mounting bearing 2 has an eccentric hole 221, and the eccentric hole 221 is used for mounting the pedal. Preferably, the pedal eccentric mounting bearing 2 has a plurality of eccentric holes 221, and the distances of the plurality of eccentric holes 221 from the center of the inner ring 22 are different. As Figure 5 shown, it is used to adjust the length of the lever arm.
[0021] As Figure 3 shown, due to the eccentric installation of the pedal on the pedal eccentric mounting bearing 2, when stepping forward from the highest position, the position of the pedal gradually becomes horizontal with respect to the crank 1, which is equivalent to lengthening the length of the crank 1. That is to say, the length of the lever arm of the lever movement during stepping is lengthened, so as to achieve the purpose of saving effort.
[0022] Embodiment 2
[0023] Refer to Figure 2 and Figure 4 , a labor-saving crank for a bicycle, comprising a crank 1, further comprising: a pedal eccentric mounting bearing 2, the pedal eccentric mounting bearing 2 is connected to the end of the crank 1, and the pedal eccentric mounting bearing is used for eccentrically mounting the pedal.
[0024] The inner ring 22 of the pedal eccentric mounting bearing 2 has a crank mounting member 222, and the inner ring 22 is fixedly connected to the end of the crank 1 through the crank mounting member 222. The side surface of the outer ring 21 of the pedal eccentric mounting bearing 2 has a pedal mounting member 211, and the pedal mounting member 211 is used for mounting the pedal. Compared with Embodiment 1, the position where the pedal is mounted is at the outermost edge of the pedal eccentric mounting bearing 2, which can change the length of the lever arm during stepping to the greatest extent.
[0025] As Figure 4 shown, due to the eccentric installation of the pedal on the pedal eccentric mounting bearing 2, when stepping forward from the highest position, the position of the pedal gradually becomes horizontal with respect to the crank 1, which is equivalent to lengthening the length of the crank 1. That is to say, the length of the lever arm of the lever movement during stepping is lengthened, so as to achieve the purpose of saving effort.
[0026] The above-described embodiments are only used to illustrate the technical solutions of the present application, and are not intended to limit the same; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the various embodiments of the present application, and should all be included in the protection scope of the present application.
Claims
1. A labor-saving bicycle crank, comprising a crank (1), characterized in that, Further comprising: A pedal eccentric mounting bearing (2), the pedal eccentric mounting bearing (2) is connected to the end of the crank (1), and the pedal eccentric mounting bearing is used for eccentrically mounting the pedal.
2. The bicycle power-saving crank according to claim 1, wherein: The pedal eccentric mounting bearing (2) is an eccentric bearing.
3. The bicycle power-saving crank according to claim 2, wherein: The end of the crank (1) is fixedly connected to the outer ring (21) of the pedal eccentric mounting bearing (2).
4. The bicycle power-saving crank according to claim 2, wherein: The inner ring (22) of the pedal eccentric mounting bearing (2) has an eccentric hole (221), and the eccentric hole (221) is used for mounting the pedal.
5. The bicycle power-saving crank according to claim 1, wherein: The inner ring (22) of the pedal eccentric mounting bearing (2) is fixedly connected to the end of the crank (1).
6. The bicycle power-saving crank according to claim 5, wherein: The inner ring (22) of the pedal eccentric mounting bearing (2) has a crank mounting member (222), and the inner ring (22) is fixedly connected to the end of the crank (1) through the crank mounting member (222).
7. The bicycle power-saving crank according to claim 5, wherein: The outer ring (21) of the pedal eccentric mounting bearing (2) is used for fixedly connecting the pedal.
8. The bicycle power-saving crank according to claim 7, wherein: The side of the outer ring (21) of the pedal eccentric mounting bearing (2) has a pedal mounting member (211), and the pedal mounting member (211) is used for mounting the pedal.
9. The bicycle power-saving crank according to claim 4, wherein: The pedal eccentric mounting bearing (2) has a plurality of eccentric holes (221), and the distances of the plurality of eccentric holes (221) from the center of the inner ring (22) are different.