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Retractable assistance crank mechanism for bicycle

A power-assisted crank and telescopic technology, which is applied in the crank structure, vehicle parts, transportation and packaging, etc., can solve the problems of variable speed bicycles that do not achieve riding effort, crank distance extension, etc.

Pending Publication Date: 2019-10-29
TIANJIN SHUANGXIN ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the speed will change according to the change of the gear ratio, the crank distance of the most fundamental bicycle transmission has not been lengthened. Therefore, the pedaling force required fundamentally has not changed, and the speed-changing bicycle has not achieved the purpose of riding labor-saving.

Method used

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  • Retractable assistance crank mechanism for bicycle
  • Retractable assistance crank mechanism for bicycle
  • Retractable assistance crank mechanism for bicycle

Examples

Experimental program
Comparison scheme
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Embodiment

[0032] In order to understand the above-mentioned purpose, features and advantages of the present application more clearly, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that, in the case of no conflict, the embodiments of the present application and the features in the embodiments can be combined with each other.

[0033] In the following description, many specific details are set forth in order to fully understand the application, but the application can also be implemented in other ways different from those described here, therefore, the protection scope of the application is not limited by the specific details disclosed below. EXAMPLE LIMITATIONS.

[0034] The invention proposes a telescopic power-assisted crank mechanism for bicycles, which includes a telescopic crank 1, a track mechanism 2, a large toothed disc 3 and a main shaft 4.

Embodiment 1

[0036] Such as Figure 1 to Figure 4 It shows a structural schematic diagram, a side view, a structural diagram of the telescopic crank, and a track diagram of the telescopic crank of the present invention.

[0037] The telescopic power-assisted crank mechanism for bicycles includes a telescopic crank 1, a track mechanism 2 and a large toothed disc 3, the telescopic crank 1, the track mechanism 2 and the large toothed disc 3 are connected by a main shaft 4, and the main shaft 4 is fixed on the track mechanism 2, and the track mechanism 2 is fixed on the bicycle, the telescopic crank 1 and the large toothed plate 3 can rotate along the main shaft 4, the large toothed plate 3 is between the telescopic crank 1 and the track mechanism 2, the large toothed plate 3 is fixed on the telescopic crank 1, and the large toothed plate 3. Rotate along with the rotation of the telescopic crank 1, the chain can be suspended on the large toothed disc 3, and the telescopic crank 1 rotates to dr...

Embodiment 2

[0044] Such as Figure 1 to Figure 4 It shows a structural schematic diagram, a side view, a structural diagram of the telescopic crank, and a track diagram of the telescopic crank of the present invention.

[0045] The telescopic power-assisted crank mechanism for bicycles includes a telescopic crank 1, a track mechanism 2 and a large toothed disc 3, the telescopic crank 1, the track mechanism 2 and the large toothed disc 3 are connected by a main shaft 4, and the main shaft 4 is fixed on the track mechanism 2, and the track mechanism 2 is fixed on the bicycle again. The telescopic crank 1 and the large toothed disc 3 can rotate along the main shaft 4. The large toothed disc 3 is between the telescopic crank 1 and the track mechanism 2. The large toothed disc 3 is fixed on the telescopic crank 1. The large toothed disc 3 is fixed on the telescopic crank 1. Disc 3 rotates along with the rotation of telescopic crank 1, and chain can be suspended on the large toothed disc 3, and...

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Abstract

The invention discloses a retractable assistance crank mechanism for a bicycle. The retractable assistance crank mechanism comprises a retractable crank, a track mechanism and a crankset, and the retractable crank, the track mechanism and the crankset are connected through a main shaft; the crankset is located between the retractable crank and the track mechanism; the surface of the track mechanism is inwards provided with a track groove; the retractable crank comprises a fixed crank and a movable crank; the fixed crank is internally provided with a slide groove; one end of the slide groove isopened, and the other end of the slide groove is closed; the movable crank slides in the slide groove; one end of the movable crank is provided with a track shaft, and the other end of the movable crank is provided with a pedal; the track shaft slides in the track groove. According to the retractable assistance crank mechanism, through the arrangement of the retractable crank and the track mechanism, the movable crank slides along the track groove, and the acting force of treadling by a rider is changed by changing the length of the retractable handle, so that the purposes of quick riding andlabor saving are achieved.

Description

technical field [0001] The invention belongs to the technical field of bicycles, and in particular relates to a telescopic power-assisted crank mechanism for bicycles. Background technique [0002] Although the various bicycles sold in the market are of various models, they are basically the transmission modes of traditional bicycles. The traditional transmission mode includes: crank pedal, flywheel, chain, sprocket and the center shaft on which the sprocket is installed. The left and right pedals drive the center shaft to rotate to drive the sprocket to rotate, and the bicycle is driven forward or backward through the chain between the sprocket and the flywheel. The distance from the two pedals of the traditional transmission mode to the central axis of the sprocket is fixed, that is to say the length of the crank is fixed, and the rotational torque is equal to the product of the rotational distance and the rotational force. Therefore, the crank distance is fixed, and whe...

Claims

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Application Information

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IPC IPC(8): B62M3/04
CPCB62M3/04
Inventor 岳国民赵凤艳岳东宇
Owner TIANJIN SHUANGXIN ELECTRONICS CO LTD
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