CN2145148Y

CN2145148Y - Fast folding bicycle

Info

Publication number: CN2145148Y
Application number: CN 92245643
Authority: CN
Inventors: 黄崇芬
Original assignee: Individual
Current assignee: Individual
Priority date: 1992-12-25
Filing date: 1992-12-25
Publication date: 1993-11-03
Anticipated expiration: 2002-12-25

Abstract

The utility model relates to a fast folding bicycle. A bicycle frame is composed of an upper beam, a lower beam, a front tube and a back tube, the front part of a middle shaft of the lower beam is provided with a deflection joint, the front section of the lower beam is hinged between the joint and a lower three-way joint of the front tube, and the middle of the upper beam is provided with a deflection hinge. The bicycle is raised upwards at the joint point of the lower beam, the deflection hinge in the middle of the upper beam is similar to the hinge of a pair of scissors, and can be folded in a scissor type, the deflection hinge which is folded or unfolded does not need to be fastened by any hand-driven device, and the deflection hinge can be tightened automatically. The operation is convenient and quick, and can be completed within about 10 seconds.

Description

Fast folding bicycle

The utility model relates to bicycle, particularly a kind of scissors fast folding bicycle.

Chinese patent 92227888.1 provides a kind of " multifunctional folding bicycle ", and it changes the traditional triangle shape vehicle frame of bicycle, adopts ladder type frame, the break symmetry, after folding, the axle coaxial line of front and back wheel, but push-and-pull walking, be easy to carry, but its folding mode is the front-wheel along continuous straight runs, doubling backward, and place, inflection point, employing screws mode and tightens up, and its operation folding or that launch does not still want to take the trouble.

The purpose of the utility model is to provide a kind of doubling on a vertical plane, and the fast folding bicycle that can tighten up automatically after folding or the expansion, makes folding operation more convenient.

Described folding bicycle, vehicle frame are trapezoidal, and it has front and rear wheel, upper beam, underbeam, preceding pipe, back pipe, and the forward and backward pipe symmetry of putting the beams in place relatively.There is the contact of a deflection front portion of middle shaft adapter, and underbeam is two sections from this contact punishment, and its leading portion and back segment are hinged at this contact place.The leading portion of underbeam has jag on hinge-point, making it is the center with this contact, only can rotate, and blocks the back segment of underbeam and can not rotate as upwards rotating jag, and the following T-pipe joint of the other end of underbeam leading portion and preceding pipe is hinged.The deflection hinge of a folk prescription to the bending self-locking arranged in the middle of putting the beams in place.

Described bicycle when folding, is upwards carried underbeam the equal upward movement of the hinge-point of upper and lower beam with hand.Deflection hinge in the middle of it is put the beams in place is similar to the hinge of scissors, makes the leading portion of upper beam and front-wheel move, close up to trailing wheel along the oblique line that intersects with the vehicle frame longitudinal centerline.Thereby being referred to as the scissors folding bicycle, it does not all need any winding device to tighten up after folding or launching, and is easy to operate, quick.

Fig. 1, the front view of described bicycle;

Fig. 2, the lateral plan after folding;

Fig. 3, the birds-eye view after folding;

Fig. 4, the birds-eye view of underbeam contact;

Fig. 5 is the partial side view of Fig. 4;

Fig. 6, the partial view after the deflection hinge doubling of upper beam;

Fig. 7 is the unfolding state figure of Fig. 6;

Fig. 8, the partial view of the deflection hinge of upper beam;

Fig. 9 is the cutaway view of Fig. 8.

Embodiment one,

Vehicle frame is trapezoidal, the contact 6 that front and back wheel is arranged, put the beams in place 1, there is a deflection axis front portion on the underbeam 5, preceding pipe 3, back pipe 8, underbeam 5, and underbeam 5 is leading portion 5a and back segment 5b from these contact 6 punishment, front and rear sections 5a, 5b are hinged at contact 6 places.Jag 7 is arranged at the hinge-point top of leading portion 5a, and present segment 5a is that upwards rotate and front and rear wheel when being in same level attitude at the center with contact 6, and jag 7 blocks back segment 5b, and rotation again can not make progress.The following T-pipe joint 4 of the other end of leading portion 5a and preceding pipe 3 is hinged.Deflection hinge 2 in the middle of the upper beam 1, referring to Fig. 6,7, on the mandrel 9 of its hinge the bevelled spin slot is arranged, on the axle sleeve 10 of the toggle that mandrel 9 rotates, the spin slot that is meshed is arranged also, put the beams in place 1 upon deployment, the bar on deflection hinge 2 both sides is on the same axis, when putting the beams in place 1 doubling, its preceding half section will be moved behind an oblique line that intersects with former axis, do scissor folding.

Embodiment two:

The put the beams in place deflection hinge 2 at 1 middle part, referring to Fig. 8,9, the toggle on its hinge both sides respectively has axle sleeve 10, axle core 9 penetrates the lack of alignment when wherein the contact end face of two axle sleeves 10 is put the beams in place expansion relatively, two axle sleeves rotate along the contact surface of deflection, make the line of centers of both sides toggle form crossing angle, for guaranteeing to tighten up automatically after upper beam 1 doubling or the expansion, the axle core 9 of deflection hinge 2 is a hollow sleeve, and one end inserting bolt 11 is with stage clip 13 on the bolt 11, the other end compresses with nut 12, to increase the friction force that two axle sleeves 10 are in contact with one another face, two axle sleeves, 10 contact surfaces have oblique groove and tiltedly double wedge engagement respectively, and upper beam 1 self-deploys state and does the doubling action, double wedge is along the inclined-plane slippage of groove, two axle sleeves 10 move to deviating from direction mutually, and stage clip 13 is further compressed, and the friction force that two axle sleeves are 10 further increases, when groove and the complete jump out of mesh of double wedge, 1 the doubling of putting the beams in place is finished, and when doubled state was launched, the axis of the toggle on both sides was concentric when groove and double wedge meshed.

Claims

1, a kind of fast folding bicycle, front and back wheel, upper beam 1, underbeam 5, preceding pipe 3, back pipe 8 are arranged, the front and back pipe is upper beam 1 symmetry relatively, it is characterized in that: there is the contact 6 of a deflection front portion of middle shaft adapter, underbeam 5 is divided into leading portion 5a and back segment 5b from this contact, and two sections 5a, 5b are hinged at contact 6 places, and leading portion 5a has jag 7 on hinge 6, the following T-pipe joint 4 of the other end of leading portion 5a and preceding pipe 3 is hinged, the 1 middle deflection hinge 2 that a folk prescription is arranged to the bending self-locking of putting the beams in place.

2, by the described fast folding bicycle of claim 1, it is characterized in that: the deflection hinge 2 in the middle of putting the beams in place, the toggle end on its both sides respectively has axle sleeve 10, axle core 9 penetrates wherein, the lack of alignment when the contact end face of two axle sleeves 10 is put the beams in place 1 expansion relatively, and an axle core 9 is a hollow sleeve, one end inserting bolt 11, be with stage clip 13 on the bolt 11, the other end compresses with nut 12, and the engagement of oblique groove and double wedge is arranged respectively on the contact surface of two axle sleeves 10.