CN2245028Y

CN2245028Y - Lossless prestress shockproof front wheel forks

Info

Publication number: CN2245028Y
Application number: CN 95233772
Authority: CN
Inventors: 张学堂; 张展九; 宋文宁
Original assignee: Individual
Current assignee: Individual
Priority date: 1995-04-28
Filing date: 1995-04-28
Publication date: 1997-01-15
Anticipated expiration: 2005-04-28

Abstract

The utility model relates to a lossless stress shockproof front wheel fork, composed of a fork vertical tube, and a left and a right forks, and is characterized in that the left and the right forks are respectively provided with a front stress belt, a back stress belt, a front side stress belt and a back side stress belt; the middle part is embedded with a fork shock-proof strip, the lower end is connected with the connecting head of a lower shaft, and the upper end is connected with a fork lower tube through an upper connecting head and then connected with a fork casing tube through a connecting piece, a fork sheath, and the fork vertical tube. The center lines of the left and the right forks and the center line of the fork vertical tube are shifted backwards with a certain distance, and the front stress belt and the back stress belt are cambered. The utility model relates to a comparatively ideal shockproof fork, at present.

Description

A kind of no energy loss prestress shock-absorbing car fork

The utility model is a kind of noenergy loss prestress shock-absorbing car fork with relating to.Be applicable to bicycle, boosted vehicle, rickshaw, alternative common car fork and cartridge type shock-absorbing car fork.I applied for " a kind of elastic shock-absorbing vehicle frame ", the patent No. be " ZL922191727 " application this time be (ZL922191727 " supporting usefulness.

Existing car fork is by the fork standpipe, about upright fork form, do not have shockproof function.The vibrations of transmitting from the road surface, roller tire absorb outside the part, most of by about upright fork through the fork standpipe, handlebar is transmitted on the row person's of riding the both hands.When running into bumpy road, violent vibrations make the row person of riding both hands numbness, even cause roll-over accident.Problems such as though cartridge type shock-absorbing car fork has certain shock-proof effect, exists the friction loss energy, and the life-span is short.

The purpose of this utility model, be to overcome above-mentioned disadvantage, provide a kind of car fork of breaking traditions can not shock-absorbing and cartridge type shock-absorbing car fork exist friction loss short shortcoming energy life time, utilize the principle of elastic element stress deformation, make a kind of new-type prestress shock-absorbing car fork of noenergy loss.

In order to achieve the above object, the utility model is achieved in that it is that (3) and left side fork (A), right fork (B) are constituted in flakes by fork standpipe (1), fork cover (2), fork.Left side fork (A) is identical with right fork (B) structure.Be characterized in left side fork (A), right fork (B) respectively has preceding stress zone (9) back stress zone (12) preceding secondary stress bands (10) back secondary stress bands (13) fork shock-absorbing bars (11) to form.Preceding secondary stress band (10) tightly invests on the preceding stress zone (9), and back secondary stress band (13) tightly invests on the back stress zone (12), and the lower end has fork absorbing bar (11) in the middle of being connected in lower shaft connector (14).The upper end is connected in fork pipe (5) down by upper binding head (8), managing (5) down with fork again is connected on the fork sleeve pipe (4), join by fork connecting strap (3) and fork cover (2) fork standpipes (1), will more than combine, just constituted a secondary noenergy loss prestress shock-absorbing car fork.

The principle of work of prestress shock-absorbing car fork is: when front vehicle wheel runs into obstacle, axletree through the masterpiece that axle lower union joint (14) transmits be used to stick between the connector (8) preceding stress zone (9) and after stress zone (12), stress zone before when pressure increases (9) is to the direction bending of fork shock-absorbing bar (11), be inner expanding force trend, back stress zone (12) bending is pulling force trend, when pressure continues to increase, the pressure that acts on the fork shock-absorbing bar (11) has reached the limit, at this moment, the stress bending has also reached maxim.Application force (F) moves up axletree forward, has played the shock-absorbing effect.The working process of whole power is nonlinear state.

Before secondary stress band (10), the toughness of back secondary stress band (13) is bigger, easy fracture not, the stressed at work state of tension that is, to preceding stress zone (9), back stress zone (12) has the safety guard-safeguard effect, and improves operating characteristic, increases the service life.The design's the fork line of centers (D) of pipe (1) has down moved a segment distance (L) backward with the line of centers (C) of pitching standpipe (1), and purpose is that stress zone (9) has good operation point and suitable front rake with back stress zone (10) before keeping.

The utility model has substituted common car fork and cartridge type shock-absorbing car fork.With cartridge type shock-absorbing car fork relatively, do not have the wearing and tearing device during work, noenergy loss, the shock resistance performance of jolting is good, the good life-span of transient state response is long, cost is lower, is that at present more satisfactory shock-absorbing car is pitched.

Description of drawings:

Fig. 1 is no energy loss prestress shock-absorbing car fork scheme drawing

Fig. 2 is a front schematic view

Fig. 3 E-E is the fork cut-away view

The explanation of accompanying drawing drawing:

A is a left side fork; B is right fork; C is fork standpipe line of centers; B is tube hub line under the fork, and F is for being subjected to force direction; L is a miles of relative movement length; R is an arc radius.

1 fork standpipe; 2 fork covers; 3 fork connecting straps; 4 fork sleeve pipes;

5 forks are pipe down; 6 sheathings; 7 upper binding heads; 8 top sieve silks;

Stress zone before 9; Secondary stress band before 10; 11 fork shock-absorbing bars;

12 back stress zones; 13 back secondary stress bands; 14 lower union joints.

In order to understand better and to implement, it is as follows with the accompanying drawing to be that embodiment further specifies below:

With (B) fork is example, and preceding stress zone (9), back stress zone (12) adopt high-quality spring steel band 62 silicon-manganese steels to form through heat treatment process.The preceding thick 1.8mm of stress zone (9), wide 15mm, long 160mm, the thick 1.8mm of back stress zone (12), wide 15mm, long 170mm, preceding stress zone (9), back stress zone (12) can adopt the 1-3 bar, preceding secondary stress band (10), back secondary stress band (13) adopt at least one as hereinbefore size without hot-cured silicomanganese steel disc, undressed silicomanganese steel disc toughness is bigger, easy fracture not, with stress zone before the hot-cured (9), back stress zone (12) is composited, preceding stress zone (9), back stress zone (12) and preceding secondary stress band (10) back secondary stress band (13) also can adopt other high-quality elastomeric material to make as 65 manganese steel bands or corrosion-resistant steel elastomeric material.Secondary stress band (10) back secondary stress band (13) before premium-quality especially elastomeric material can save.

Preceding secondary stress band of preceding stress zone (9) (10) and the attached arc of back stress zone (12) back secondary stress band (13) shaping are fitted together with axle lower union joint (14) upper binding head (8), to pitch shock-absorbing bar (11) again is embedded on the locus of preceding secondary stress band of preceding stress zone (9) (10) and back stress zone (12) back secondary stress band (13), fork shock-absorbing bar (11) [seeing accompanying drawing 3] can adopt the high-quality caoutchouc vulcanization to form, and also can adopt polyamine fat elastomeric material to make.

To pitch standpipe (1), fork cover (2), fork connecting strap (3), fork sleeve pipe (4), fork is pipe (5) down, form one with the method for welding, put lower fork that sheathing (6) will perform and partly manage (5) down and combine, hold out against with top sieve silk (8) by upper binding head (8) and fork.(A) Cha assembly method is with (B) [seeing accompanying drawing 2], and a complete no energy loss prestress shock-absorbing car fork is made and finished.

Claims

1, a kind of no energy loss prestress shock-absorbing car fork by fork standpipe (1), fork cover (2), pitch repeatedly sheet (3), left side fork (A), right fork (B) and formed.Left side fork (A), identical with right fork (B) structure.It is characterized in that left side fork (A), right fork (B) respectively is provided with preceding stress zone (9), back stress zone (12), preceding secondary stress band (10), back secondary stress band (13), centre are embedded with fork shock-absorbing bar (11), and the lower end is connected in lower shaft connector (14) upper end by on the last shaft clevis sleeve pipe (4), by fork connecting strap (3) and fork cover (2), fork standpipe (1) joins.The line of centers (D) of left side fork (A) and right fork (B) has moved a segment distance L backward with the line of centers (C) of fork standpipe (1), stress zone (12) curved (R) behind the preceding stress zone (9).

2, by the described a kind of no energy loss prestress shock-absorbing car fork of claim 1, it is characterized in that preceding stress zone (9) is combined with each other with preceding secondary stress band (10).Back stress zone (12) is combined with each other with back secondary stress band (13).

3, by claim 1,2 described a kind of no energy loss prestress shock-absorbing car forks, it is characterized in that preceding stress zone (9) back stress zone (12) is at least one to 3.Preceding secondary stress band (10) back secondary stress band (13) at least one.

4, by the described a kind of no energy loss prestress shock-absorbing car fork of claim 1, it is characterized in that, preceding stress zone (9), back stress zone (10) curved (R) is 100mm-500mm.

5, by the described a kind of no energy loss prestress shock-absorbing car fork of claim 1, it is characterized in that it is 25mm-60mm that the line of centers (D) of left side fork (A) and right fork (B) has moved a segment distance L backward with the line of centers (C) of fork standpipe (1).

6, by the described a kind of no energy loss prestress shock-absorbing car fork of claim 1, it is characterized in that fork connecting strap (3) adopts the 2-4 sheet.