Four-link lever folding bicycle frame

A four-link and frame technology, which is applied in the frame field of two-wheeled vehicles, can solve the problems of affecting the bearing capacity, affecting the strength of the horizontal tube, and complexity, and achieves improved stress conditions, improved safety, and simple folding Effect

Active Publication Date: 2008-07-16
无锡圣达车业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the used frame has two horizontal tubes, it is necessary to disconnect the two horizontal tubes and then hinge them separately. The horizontal tube used usually plays the role of carrying the weight of the human body. This complex joint will seriously affect the strength of the horizontal tube, thereby affecting its bearing capacity

Method used

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  • Four-link lever folding bicycle frame
  • Four-link lever folding bicycle frame

Examples

Experimental program
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Effect test

Embodiment Construction

[0016] As shown in the figure: the upper and lower ends of the head tube 4 are respectively hinged on the upper tube 5 and the front section 14 of the down tube, and the folding joint 16 and the folding joint 17 are respectively formed at the hinge points; The lower end is hinged, the rear end of the front section 14 of the lower tube is connected with the inner bottom bracket 12, the front end of the rear section 11 of the lower tube is connected with the outer bottom bracket 20, and the outer bottom bracket 20 is set outside the inner bottom bracket 12 to form a folding joint 18 ; The rear end of the lower tube rear section 11 is connected with the rear fork 8, and the rear end of the upper tube 5 is hinged with the rear fork to form a folding joint 19. A seat tube 6 is provided on the top tube 5 .

[0017] When folding, use the reinforcing tube 10 as a handle to force the front section 14 of the lower tube and the rear section 11 of the lower tube to take the folding joint ...

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PUM

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Abstract

The invention relates to a frame of a cart, in particular to a simple, convenient and swift four-link fold-up frame. According to the technical proposal provided by the invention, the frame can be divided into four parts which are an upper pipe, a head pipe, a forepart of a lower pipe and a posterior part of a lower pipe respectively; the four parts form a structure of the four-link; wherein, an upper end of the head pipe is hinged with a front end of the upper pipe and a fold-up joint is formed in the connection part; a lower end of the head pipe is hinged with a front end of the forepart of the lower pipe and the fold-up joint is formed in the connection part; a back end of the forepart of the lower pipe is hinged with a front end of the posterior part of the lower pipe and the fold-up joint is formed in the connection part; a back end of the posterior part of the lower pipe is hinged with a back end of the upper pipe and the fold-up joint is formed in the connection part. When a horizontal pipe of the four-link fold-up frame folds up, the horizontal pipe can rotate in a vertical plane, and therefore the operation is simple; the upper pipe of the frame is of an arch shape, which can more effectively enhance intensity of the horizontal pipe and skillfully evade the fold-up joint.

Description

technical field [0001] The invention relates to a vehicle frame of a two-wheel vehicle, in particular to a simple and quick four-link foldable vehicle frame. Background technique [0002] Existing folding bicycle frames generally include a head tube, a cross tube and a seat tube. Wherein, the head pipe is positioned at the front end of the cross pipe, and there is a vertically arranged seat pipe in the middle of the cross pipe. When producing bicycles, the front wheel is installed on the lower end of the head tube, the rear wheel is installed on the rear end of the cross tube, the seat cushion is installed on the upper end of the seat tube, and the handlebar is installed on the upper end of the head tube. In order to facilitate folding, the horizontal tube is usually divided into two sections, which are then hinged to each other. When it needs to be folded, the relevant locking mechanism is pulled out so that the two sections of horizontal tubes can be folded together in t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B62K15/00
Inventor 张胜祥
Owner 无锡圣达车业有限公司
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