CN201580503U

CN201580503U - Front fork

Info

Publication number: CN201580503U
Application number: CN2009202415738U
Authority: CN
Inventors: 李文法
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-11-30
Filing date: 2009-11-30
Publication date: 2010-09-15
Anticipated expiration: 2019-11-30

Abstract

The utility model relates to a front fork which comprises a front fork main rack and two shock absorbers arranged on the front fork main rack. A front fork vertical pipe is arranged at the upper part of the front fork main rack, and a shoulder box which is formed through integrated stamping is arranged at the lower part. Each shock absorber comprises a shock absorption cylinder and a guide rod, the shock absorption cylinder is formed through stamping by a pipe, a wheel shaft connecting hole is arranged at the bottom end of the shock absorption cylinder, and the guide rod is arranged with the shock absorption cylinder in a matching manner; the shock absorbers are respectively arranged at the two ends of the shoulder box by the guide rods, and the connecting positions between the guide rods and the shoulder box are welded. The shoulder box and the shock absorption cylinders of the front fork in the utility model are all formed through integrated stamping, while the shoulder box and the shock absorption cylinders of the front fork in the prior art are formed through casting and need post-processing; therefore, compared with the prior art, the front fork in the utility model has the characteristics of simple manufacturing procedure, beautiful outer surface, strong impact resisting capability and the like; as the connecting positions between the guide rods and the shoulder box are welded, the stability is enhanced; in addition, the surface of the front fork is relatively beautiful.

Description

Front fork

Technical field

The utility model belongs to two-wheeled or three-wheel vehicle accessory technical field, relates to a kind of front fork.

Background technology

The shoulder box and the general casting of damping cylinder of existing motor bike, storage battery car front fork, but because the defective of foundry technique itself, these processed goods rough surface, need just can use through processed later, operation is loaded down with trivial details, manufacturing cost is high, and defectives such as sand holes, pin hole, stress appear in casting process easily, thus a little less than these casting product impact resistances, aspect intensity, have a potential safety hazard; And the contiguous block that is shaped on the wheel shaft connecting bore often is welded on the damping cylinder bottom, the one, and there is the welding scar, influences outward appearance, the 2nd, there is thermal stress, influences intensity.Vibration damper pilot is screwed between the box with shoulder and is connected the not attractive in appearance and less stable of profile.

Summary of the invention

The purpose of this utility model provides that a kind of Fabrication procedure is simple, outside face is attractive in appearance, the front fork of stability and strong shock resistance.

The technical scheme that the utility model adopted is to achieve the above object of the invention:

A kind of front fork comprises front fork body frame and dress two bumpers thereon, and front fork body frame top is vertical tube of front fork, and the bottom is the shoulder box, it is characterized in that: described bumper is welded on shoulder box two ends.

Described bumper comprises with pipe punch forming and bottom and is shaped on the damping cylinder of wheel shaft connecting bore and cooperates the guide rod of installation with damping cylinder that bumper is welded on by the guide rod on it and takes on the box two ends.

Described front fork body frame bottom is whole stamping forming shoulder box.

Be provided with elastic buffering mechanism between described bumper in-to-in guide rod bottom face and the damping cylinder inner bottom surface.

Described elastic buffering mechanism is by main spring and be positioned under the elasticity of main spring bump rubber and form.

Be socketed with the upper and lower orienting sleeve that cooperates with the damping cylinder internal diameter on the described guide rod, be provided with damping return shock absorber between the upper and lower orienting sleeve.

Described return shock absorber comprises second jump ring that is connected on the guide rod, is provided with recoil spring between second jump ring and the last orienting sleeve.

Interlocking has smooth, abrasion resistant pilot bushing on the described orienting sleeve down, and wherein descending between orienting sleeve and the damping cylinder is free-running fit, and pilot bushing contacts with the damping cylinder inwall.

Described wheel shaft connecting bore edge is welded with the fastening axle sleeve of front-wheel.

Shoulder box of the present utility model and damping cylinder are whole punch forming, with casting of the prior art and need to compare characteristics such as having Fabrication procedure is simple, outside face is attractive in appearance, strong shock resistance through processed later; Guide rod and the junction process soldering of takeing on box, stability enhancing and surface are relatively attractive in appearance; Bumper in-to-in bump rubber, spring and return shock absorber are suitable substantially with the hydraulic cushion effect of motor bike in conjunction with the buffer system buffering effect that constitutes, but that cost is compared hydraulic efficiency pressure system is much cheap.

Description of drawings

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

Fig. 2 is the structural representation of bumper among Fig. 1.

The specific embodiment

As shown in Figure 1, a kind of front fork comprises front fork body frame and two bumpers, front fork body frame top is vertical tube of front fork 15, the bottom is whole stamping forming shoulder box 16, and shoulder box 16 two ends all are shaped on 17, two bumpers of guide rod mounting hole and are installed in respectively on the guide rod mounting hole 17 at shoulder box 16 two ends.

The structure of described bumper is as shown in Figure 2: it comprises damping cylinder 1 and the guide rod 14 that is connected by first jump ring 12 with it, first jump ring 12 is positioned at the upper end near damping cylinder 1, wherein the damping cylinder direct punch forming of 1 usefulness pipe and its bottom are shaped on the wheel shaft connecting bore, be welded with the fastening axle sleeve 18 of front-wheel on the wheel shaft connecting bore, damping cylinder 1 is provided with ornamental trimming 19, bumper is installed on the guide rod mounting hole 17 at shoulder box 16 two ends by guide rod 14, and the junction of guide rod 14 and guide rod mounting hole 17 is through soldering.First jump ring, 12 belows on the described guide rod 14 and guide rod 14 lower ends are socketed with the upper and lower orienting sleeve 10,5 that cooperates with damping cylinder 1 internal diameter respectively, be provided with by main spring 3 between guide rod 14 bottom faces and damping cylinder 1 inner bottom surface and be positioned at the elastic buffering mechanism that bump rubber 4 is formed under the elasticity of main spring 3, described time bump rubber 4 is the rubber block of upper end open, boring; Be provided with the return shock absorber between the upper and lower orienting sleeve 10,5 of guide rod 14, described return shock absorber comprises between second jump ring, 7, the second jump rings 7 that are connected on the guide rod 14 and the last orienting sleeve 10 and is provided with recoil spring 9; Described orienting sleeve 5 down is an open tank shape structure, and end in contact plays the effect of pad on its bottom surface and the main spring 3, is provided with spring shim 2 between main spring 3 lower ends and damping cylinder 1 inner bottom surface, also is provided with pad 8 between recoil spring 9 lower ends and second jump ring 7; Interlocking has smooth, abrasion resistant pilot bushing 6 on the described following orienting sleeve 5, and wherein descending between orienting sleeve 5 and the damping cylinder 1 is free-running fit, and pilot bushing 6 contacts with damping cylinder 1 inwall, plays the effect that protection is descended orienting sleeve 5 and reduced cliding friction; Described going up between the orienting sleeve 10 and first jump ring 12 is with seal ring 11, seal ring 11 size cooperates with gap length between guide rod 14, the damping cylinder 1, damping cylinder 1 top is equipped with the dust boot 13 that cooperates with guide rod 14, and actv. prevents that dust from entering bumper inside.

Claims

1. a front fork comprises front fork body frame and dress two bumpers thereon, and front fork body frame top is vertical tube of front fork (15), and the bottom is shoulder box (16), it is characterized in that: described bumper is welded on shoulder box (16) two ends.

2. front fork according to claim 1, it is characterized in that: described bumper comprises with pipe punch forming and bottom and is shaped on the damping cylinder (1) of wheel shaft connecting bore and cooperates the guide rod (14) of installation with damping cylinder (1) that bumper is welded on by the guide rod on it (14) and takes on box (16) two ends.

3. front fork according to claim 1 and 2 is characterized in that: described front fork body frame bottom is a whole stamping forming shoulder box (16).

4. front fork according to claim 2 is characterized in that: be provided with elastic buffering mechanism between described bumper in-to-in guide rod (14) bottom face and damping cylinder (1) inner bottom surface.

5. front fork according to claim 4 is characterized in that: described elastic buffering mechanism is by main spring (3) and be positioned under the elasticity of main spring (3) bump rubber (4) and form.

6. according to claim 4 or 5 described front forks, it is characterized in that: be socketed with the upper and lower orienting sleeve (10,5) that cooperates with damping cylinder (1) internal diameter on the described guide rod (14), upper and lower orienting sleeve is provided with damping return shock absorber between (10,5).

7. front fork according to claim 6 is characterized in that: described return shock absorber comprises second jump ring (7) that is connected on the guide rod (14), is provided with recoil spring (9) between second jump ring (7) and the last orienting sleeve (10).

8. front fork according to claim 7, it is characterized in that: described orienting sleeve (5) is down gone up interlocking smooth, abrasion resistant pilot bushing (6), wherein descending between orienting sleeve (5) and the damping cylinder (1) is free-running fit, and pilot bushing (6) contacts with damping cylinder (1) inwall.

9. front fork according to claim 2 is characterized in that: described wheel shaft connecting bore edge is welded with the fastening axle sleeve of front-wheel (18).