CN2274164Y

CN2274164Y - Shock-proof frame of bicycle

Info

Publication number: CN2274164Y
Application number: CN96218017U
Authority: CN
Inventors: 高富雄
Original assignee: Individual
Current assignee: Individual
Priority date: 1996-08-05
Filing date: 1996-08-05
Publication date: 1998-02-11
Anticipated expiration: 2006-08-05
Also published as: FR2768989B3; FR2768989A3; GB9716016D0; CA2210671A1; AU3314797A; GB2316046B; GB2316046A

Abstract

The utility model relates to a shock-proof frame of a bicycle which is mainly an improvement on the connecting seat rod, a lower tube, a back lower fork and the spindle sleeve ring of a spindle unit, which are arranged on the frame of a bicycle provided with a damping device. The inner side of the spindle sleeve ring is matched and provided with a rotary shaft which can rotate freely in the spindle sleeve ring, and the external wall of the rotary shaft is fixedly welded with two positioning rings respectively arranged at the left and the right ends of the spindle sleeve ring to prevent the spindle sleeve ring and the rotary shaft from slipping axially; the seat rod of the bicycle frame and the lower end of the lower tube are welded and fixed on the external wall of the spindle sleeve ring, the front end of the rear lower fork is welded and fixed at the left and the right ends of the external wall of the rotary shaft, and the spindle unit is arranged in the rotary shaft. The utility model has firm structure, and can prevent from the improper match between a chain wheel and a chain.

Description

The automatic shock-proof body frame structure for automotive

The utility model relates to a kind of automatic shock-proof body frame structure for automotive, is meant especially a kind of sprocket wheel and not cooperating of chain can produce defectives such as loose, can form the automatic shock-proof body frame structure for automotive of rugged construction again.

Present bicycle is provided with Shock absorber, be used to absorb the vibrations that the unequal factor in ground is produced, make the rider energy pleasant, referring to the bicycle that Shock absorber 10a is set at present shown in Figure 1, the Chain stay 11a of its vehicle frame, Seat stay 12a is movable design, Chain stay 11a front end is hinged on the hinged seat 13a, Seat stay 12a front end then is connected with Shock absorber 10a, when rear wheel 14a makes knee-action because of the unequal factor vibrations in ground, rear wheel 14a and Seat stay 12a, Chain stay 11a is just with the fulcrum interlock Shock absorber 10a effect of Chain stay 11a front end hinge-point A, mat Shock absorber 10a absorbing vibration.The hinge-point A of the Chain stay 11a front end of this shock-absorbing vehicle frame and the AnchorPoint B of the place ahead sprocket wheel 15a are not positioned at same point, therefore when rear wheel 14a and rear sprocket wheel 16a move up and down because of vibration, because of rear sprocket wheel 16a moves up and down with the fulcrum of hinge-point A, therefore the distance of the place ahead sprocket wheel 15a and rear sprocket wheel 16a can change, make two sprocket wheel 15a and 16a go up the chain 17a that cooperates and to produce relaxation, cause sprocket wheel 15a, 16a, chain 17a transmission really, be easy to generate the skid phenomenon, cause the inconvenience in the use.Moreover the hinged seat 13a of the shock-absorbing vehicle frame of this bicycle is its fulcrum that bears shaking force, so hinged seat 13a is easy to generate fracture damage.

The utility model purpose provides a kind of firm in structure, automatic shock-proof body frame structure for automotive that can not produce sprocket wheel and chain slack phenomenon.

The utility model is achieved in that this body frame structure for automotive is promptly in order to Connection Block bar, the following main shaft collar of pipe, Chain stay and spindle unit, it is characterized in that: this main shaft collar is hollow cylindrical, its inside is sheathed with one and is hollow circle shape and coaxial turning cylinder, this turning cylinder is in the inner hinge-like that is free to rotate of the main shaft collar, the solid welding of turning cylinder outer wall has two steady rings, and these two steady rings lay respectively at the left and right two ends of the main shaft collar; The vehicle frame seat bar of bicycle reaches down, and the lower end of pipe can be welded in main shaft collar outer wall, the Chain stay front end of vehicle frame is welded in the nearly left and right two ends of turning cylinder outer wall, turning cylinder inside can cooperate for spindle assemblies, and makes the hinge-point of Chain stay front end and the axle center of the place ahead sprocket wheel be positioned at same point.

Characteristics of the present utility model are: mainly the cycle frame that is provided with Shock absorber is used for the Connection Block bar, following pipe, the main brass loop section of Chain stay and spindle assemblies etc. improves, this main shaft collar internal sleeve is closed a turning cylinder that can freely rotate within it, the solid welding of turning cylinder outer wall has two steady rings, this two steady ring is positioned at a main shaft collar left side, right two ends, be used to prevent produce axial slip between the main shaft collar and turning cylinder, the lower end solid welding of pipe was at main shaft collar outer wall under the seat bar of cycle frame reached, the Chain stay front end solid welding of vehicle frame is closely left at the turning cylinder outer wall, place, right two ends, turning cylinder inside can cooperate for spindle assemblies, can prevent sprocket wheel and chain mismate on the whole, and form rugged construction.

Fig. 1 is common bicycle front view;

Fig. 2 is a three-dimensional combination figure of the present utility model;

Fig. 3 is a three-dimensional exploded view of the present utility model;

Fig. 4 is that the utility model is assembled in the front view on the bicycle;

Referring to Fig. 2, Fig. 3, the utility model is a kind of shock-absorbing vehicle frame of bicycle, mainly be to Connection Block bar 20, under manage 21, the main shaft collar 10 parts of Chain stay 22 and spindle unit 23 (referring to Fig. 4) etc. are improved, this main shaft collar 10 is hollow cylindrical, its inside can be combined with a turning cylinder 11, this turning cylinder 11 also is hollow cylindrical, its outer wall just can cooperate do clearance with the inwall of the main shaft collar 10, turning cylinder 11 is hinge-like after being installed on the main shaft collar 10 inside, can do freely to rotate, and two steady rings 12 are arranged in turning cylinder 11 outer wall solid weldings, this two steady ring 12 lays respectively at two ends, the main shaft collar 10 left and right sides, can be used for preventing producing between the main shaft collar 10 and the turning cylinder 11 axial slippage, by the main shaft collar 10 and cooperating of turning cylinder 11 forming a coaxial automatic shock-proof vehicle frame.

Referring to Fig. 4 (simultaneously referring to Fig. 2, Fig. 3), the lower end of pipe 21 can be welded in the outer wall of the main shaft collar 10 under the seat bar 20 of cycle frame reached, the front end of the Chain stay 22 of vehicle frame can be welded in place, the nearly left and right two ends of turning cylinder 11 outer walls, turning cylinder 11 inside can supply spindle unit 23 cooperations such as grade, spindle unit 23 also is connected with the place ahead sprocket wheel 24 and crank 25, so that drive 24 rotations of the place ahead sprocket wheel by trampling stretcher 26 interlock cranks 25, and then nationality chain 27 drives rear sprocket wheel 28 and rear wheel 29 rotates, and Seat stay 30 front ends are connected with Shock absorber 31.When rear wheel 29 was made knee-action because of the unequal factor vibrations in ground, rear wheel 29 and Seat stay 30, Chain stay 22 will be a spot wobble with the turning cylinder 11 of Chain stay 22 front ends welding, with 31 effects of interlock Shock absorber, by Shock absorber 31 absorbing vibrations.

Because of the main shaft collar 10 of the present utility model and turning cylinder 11 mutual fits formation coaxial design, make the hinge-point C of Chain stay 22 front ends and the AnchorPoint of the place ahead sprocket wheel 24 be positioned at same point, therefore when rear wheel 29 and rear sprocket wheel 28 move up and down because of vibrations, because rear sprocket wheel 28 is that the AnchorPoint with the place ahead sprocket wheel 24 is that fulcrum moves, so the place ahead sprocket wheel 24 is constant with the distance of rear sprocket wheel 28, make two

sprocket wheels

24 and 28 chains 27 that cooperate can not produce improper points such as loose, prevent skid, and the coaxial design of the main shaft collar 10 and turning cylinder 11 mutual fits, can form very strong design, and the anxiety of non-cracking damage.Moreover the main shaft collar 10 and turning cylinder 11 fit that is hinged can be done hinged effect to each other, therefore can omit tool and absorb front vehicle wheel 32 vibrating effects.

Claims

1, a kind of automatic shock-proof body frame structure for automotive, this body frame structure for automotive is promptly in order to Connection Block bar, the following main shaft collar of pipe, Chain stay and spindle unit, it is characterized in that: this main shaft collar is hollow cylindrical, its inside is sheathed with one and is hollow circle shape and coaxial turning cylinder, this turning cylinder is in the inner hinge-like that is free to rotate of the main shaft collar, the solid welding of turning cylinder outer wall has two steady rings, and these two steady rings lay respectively at the left and right two ends of the main shaft collar; The vehicle frame seat bar of bicycle reaches down, and the lower end of pipe can be welded in main shaft collar outer wall, the Chain stay front end of vehicle frame is welded in the nearly left and right two ends of turning cylinder outer wall, turning cylinder inside can cooperate for spindle assemblies, and makes the hinge-point of Chain stay front end and the axle center of the place ahead sprocket wheel be positioned at same point.