CN2300578Y

CN2300578Y - Rear wheel shock-damping device for bicycle

Info

Publication number: CN2300578Y
Application number: CN 97210659
Authority: CN
Inventors: 胡水林
Original assignee: Individual
Current assignee: Individual
Priority date: 1997-02-01
Filing date: 1997-02-01
Publication date: 1998-12-16
Anticipated expiration: 2007-02-01

Abstract

The utility model relates to a rear wheel shock-damping device for a bicycle, which belongs to the improvement on the prior art and comprises a shock-damping device, a bicycle frame vertical tube, a rear wheel fork, a rear wheel fork cross stay, a rear wheel and three hinges A, B and C, wherein, the shock-damping device is arranged between the rear wheel fork cross stay and the bicycle frame vertical tube, so the rear wheel can move up and down under the action of the shock-damping device and the three hinges. The utility model has the advantages of simple and reasonable structure, low cost, light weight, good shock-damping effect, no influence on the installation of the hinge hood, and being made into various bicycles, etc.

Description

The bicycle rear shock absorption device

The utility model relates to bicycle, is a kind of bicycle rear shock absorption device.

" bicycle that has shock absorption device " that Chinese patent 93248139.6 is provided though also be provided with bumper between rear wheel fork diagonal brace and the seat tube, because of its bumper system is fixed on the seat tube, influenced effective work of bumper.

The purpose of this utility model is in order to overcome the deficiency of above-mentioned existence, and a kind of bicycle rear shock absorption device with good damping performance is provided.

The purpose of this utility model is achieved in that promptly at seat tube, rear wheel fork, rear wheel fork diagonal brace and place, vehicle frame axis outer ring, set up the three hinge A of place, B, C, make trailing wheel do up and down around hinge C, rear wheel fork diagonal brace upper end is connected with bumper, its bumper can be the air damping structure, the hydraulic damping structure, simple and easy spring structure and other structure or the like.

Impact and during vibrations when wheel runs into, under the effect that is fixed in bumper on the rear wheel fork diagonal brace and A, B, C hinge, make the impact of vehicle and vibrations become soft slowly, make the cyclist be able to comfortable riding.

The utility model is described in further detail below in conjunction with drawings and Examples:

Fig. 1 is a structural representation of the present utility model;

Fig. 2 is the utility model air damping structural damping device scheme drawing;

Fig. 3 is the utility model hydraulic damping structural damping device scheme drawing;

Fig. 4 is the simple and easy spring structure shock absorption device of a utility model scheme drawing;

Bumper in the drawings 1; 2, seat tube; 3, rear wheel fork; 4, rear wheel fork diagonal brace; 5, trailing wheel; 6, hinge fork; 7, nut; 8, damping spring cap; 9, piston rod; 10, piston barrel; 11, piston cylinder base; 12, nut; 13, damping spring; 14, hinge fork; 15, hinge fork; 16, damping hole; 17, unidirectional valve opening; 18, check valve sheet; A. hinge; B. hinge; C. hinge; The I piston head; D. gas dome; E. reservoir compartment; F. reservoir compartment.

Can see that in Fig. 1 utility model is made of (A), (B), (C) three place's hinges and bumper (1), seat tube (2), rear wheel fork (3), rear wheel fork diagonal brace (4) and trailing wheel (5).

Can see in Fig. 2 air damping structural damping device scheme drawing: seat tube (2) is connected with hinge seat (A), hinge fork (6) is linked together with piston rod (9) by nut (7) and damping spring cap (8), piston rod (9) stretches in the piston barrel (10), can be to lower slider, the end of piston rod is piston head (I), piston head is provided with piston ring and damping hole (16), the piston barrel end is furnished with nut (12) and blocks piston head (I), piston head is skidded off outside the tube, the piston barrel bottom is piston cylinder base (11), piston cylinder base (11) is fixed in rear wheel fork diagonal brace (4) upper end, one damping spring that holds out against (13) is arranged between piston cylinder base (11) and the damping spring cap (8), rear wheel fork diagonal brace (4) lower end has hinge fork (14) and rear wheel fork (3) end to make hinge (B), and rear wheel fork (3) other end also has the affixed hinge seat in hinge fork (15) and vehicle frame axis outer ring to make hinge (C).When Uneven road, trailing wheel (5) is impacted, (A) (B) (C) three hinge action and trailing wheel are around hinge (C) motion, piston barrel (10) upward movement, piston head (I) moves downward relatively, the air of (D) chamber in compression shock absorption spring (13) and the piston barrel, the compression high pressure air of (D) chamber is discharged from damping hole (16) rapidly, slowed down the impact of trailing wheel, after impulsive force disappears bicycle, owing to there has not been impulsive force, under the effect of damping spring (13), air is under bar pressure, and the slower choke hole (16) of passing through enters (D) chamber, make to impact to become soft, piston head and piston barrel are returned to original position.

Can see in Fig. 3 hydraulic damping structural damping device scheme drawing: this device is on the basis at Fig. 2, structurally change, piston head (I) is except that being provided with damping hole (16) and piston ring, also be provided with unidirectional valve opening (17) and check valve sheet (18), nut (12) has been set up seal ring, and hydraulic oil is spilt from nut (12).When Uneven road, trailing wheel (5) is impacted, (A) (B) (C) three hinge action, rear wheel fork (3) is around hinge (C) motion, piston barrel (10) upward movement, piston head (I) moves downward relatively, the compression shock absorption spring (13) and (E) hydraulic oil of chamber, make it flow to (F) chamber rapidly, make piston barrel upward movement faster, slowed down impact bicycle from damping hole (16) and unidirectional valve opening (17), after impulsive force disappears, under the effect of damping spring, piston head (I) upward movement, check valve sheet (18) has been sealed unidirectional valve opening (17), make hydraulic oil flow back to (E) chamber from damping hole (16), because of flow reduces, make the answer of piston barrel and piston head comparatively slow, impact also becoming soft.

Can see from the simple and easy spring structure shock absorption device of Fig. 4 scheme drawing: this device has been simplified the structure of Fig. 2, cancelled the higher piston head (I) of manufacturing cost, it is step-like that the end of piston rod (9) becomes, and do not make piston rod from piston barrel 110 blocking under the shelves of nut (12)) in deviate from.When Uneven road, trailing wheel is impacted, (A) (B) (C) three hinge action rear wheel fork are around hinge (C) motion, the piston barrel upward movement, the compression shock absorption spring absorbs the impulsive force to bicycle, after impulsive force disappears, under the effect of damping spring, piston rod and piston barrel are returned to original position.

The utility model is the improvement to existing technology, so bicycle manufacturer exists Can go into operation on the existing production basis, practical. Compared with prior art, has knot Structure is simple, reasonable, in light weight, cost is low, do not affect whole chain cover by dress, can be used for The high and low shelves of different styles man, lady's bicycle, power assist vehicle, light motorcycle etc.

Claims

1, a kind of include bumper (1), seat tube (2), rear wheel fork (3), rear wheel fork material support (4), trailing wheel (5) and (A), the bicycle rear shock absorption device that constituted of (B), (C) three place's hinges, it is characterized in that: the upper end of rear wheel fork diagonal brace (4) is connected with bumper (1), the other end of bumper is hinged on the hinge (A) on the seat tube (2), the lower end of rear wheel fork diagonal brace (4) then is hinged on the hinge (B) of rear wheel fork (3) end and locates, and the other end of rear wheel fork (3) is hinged on the hinge (C) at the place, axis outer ring of seat tube (2).

2, bicycle rear shock absorption device according to claim 1 is characterized in that: the bumper that is comprised (1) can be simple and easy spring structure or air damping structure and hydraulic damping structure.