Foldable frame of foldable bicycle

Abstract

The invention relates to a structural technology for a foldable frame of a foldable bicycle. The foldable frame mainly comprises a front tube, a cross beam, a rear beam, a vertical tube and a rear fork, wherein the front end of the front beam is fixedly connected with the front tube; the front beam, the rear beam and the rear fork are hinged in sequence; in order to overlap a front wheel and a rear wheel alternately to fold the bicycle, the front beam and the rear beam are in oblique-shaft hinge; the vertical tube is hinged on the rear beam; the vertical tube and the rear fork are linked by being engaged mutually by a gear; and an inhaul cable traction arm fixedly connected to the vertical tube drags an inhaul cable of which one end is fixed on the front beam. When the foldable frame is folded, the vertical tube rotates forwards and is overlapped with the rear beam, meanwhile, the rear fork rotates downwards from a horizontal state to a vertical state under the action of the gear, at the same time, the inhaul cable drags the front beam to rotate downwards from the horizontal state to the vertical state; action progresses of the vertical tube and the rear fork when the foldable frame is unfolded are opposite to action progresses of the vertical tube and the rear fork when the foldable frame is folded; and the unfolding of the front beam is driven by a spring when the inhaul cable is released. The foldable frame disclosed by the invention realizes the purpose of automatic folding by using the gear, the inhaul cable and the spring as conditions.

Description

technical field

[0001] The invention relates to a vehicle, in particular to a foldable frame structure technology of a foldable bicycle. Background technique

[0002] As a non-polluting means of transportation, bicycles have been gradually recognized and valued by people in today's era of advocating green and low-carbon life, but their large size restricts its use, especially in public transportation systems. Those who are the main means of transportation and those who have experienced bicycle theft have a deep understanding. Although there are various folding bicycles for sale on the market, they are still relatively large in size after folding, and the folding operation is not very convenient. Contents of the invention

[0003] The present invention provides a folding bicycle frame with a higher folding rate and more convenient folding operation, aiming at that the volume of the existing folding bicycle is still large after folding and the folding is inconvenient. [00...

Examples

Embodiment Construction

[0037] The present invention is mainly composed of a front pipe 1, a front beam 2, a rear beam 3, a standpipe 5, and a rear fork 4; The front and rear ends of the rear beam 3 are provided with hinged devices corresponding to the front beam 2, the rear fork 4 and the standpipe 5, and the center shaft seat connected with the crutches is arranged on the rear beam 3; Corresponding hinge device, a gear 13 concentric with the hinge shaft 7 is fixed; a hinge device corresponding to the rear beam 3 is arranged at the lower end of the standpipe 5, a gear 12 concentric with the hinge shaft 8 is fixed, and a gear 12 is set in the riser 5 Saddle tube; in order to make the front and rear wheels misaligned and folded, the rear end of the front beam 2 and the front end of the rear beam 3 are hinged with the oblique axis 6; The lower end of the tube 5 is hinged to the rear of the rear beam 3, the center line of the hinge shaft 8 is perpendicular to the body surface, the gear 12 at the lower e...

technical field

[0001] The invention relates to a vehicle, in particular to a foldable frame structure technology of a foldable bicycle. Background technique

[0002] As a non-polluting means of transportation, bicycles have been gradually recognized and valued by people in today's era of advocating green and low-carbon life, but their large size restricts its use, especially in public transportation systems. Those who are the main means of transportation and those who have experienced bicycle theft have a deep understanding. Although there are various folding bicycles for sale on the market, they are still relatively large in size after folding, and the folding operation is not very convenient. Contents of the invention

[0003] The present invention provides a folding bicycle frame with a higher folding rate and more convenient folding operation, aiming at that the volume of the existing folding bicycle is still large after folding and the folding is inconvenient. [00...

Examples

Embodiment Construction

[0037] The present invention is mainly composed of a front pipe 1, a front beam 2, a rear beam 3, a standpipe 5, and a rear fork 4; The front and rear ends of the rear beam 3 are provided with hinged devices corresponding to the front beam 2, the rear fork 4 and the standpipe 5, and the center shaft seat connected with the crutches is arranged on the rear beam 3; Corresponding hinge device, a gear 13 concentric with the hinge shaft 7 is fixed; a hinge device corresponding to the rear beam 3 is arranged at the lower end of the standpipe 5, a gear 12 concentric with the hinge shaft 8 is fixed, and a gear 12 is set in the riser 5 Saddle tube; in order to make the front and rear wheels misaligned and folded, the rear end of the front beam 2 and the front end of the rear beam 3 are hinged with the oblique axis 6; The lower end of the tube 5 is hinged to the rear of the rear beam 3, the center line of the hinge shaft 8 is perpendicular to the body surface, the gear 12 at the lower e...

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