CN112693550A

CN112693550A - Single-tube hollow front fork and mounting method

Info

Publication number: CN112693550A
Application number: CN202110093794.0A
Authority: CN
Inventors: 崔晓宏; 尹影
Original assignee: Suzhou Noahs Electric Bicycles Co ltd
Current assignee: Suzhou Noahs Electric Bicycles Co ltd
Priority date: 2021-01-25
Filing date: 2021-01-25
Publication date: 2021-04-23
Anticipated expiration: 2041-01-25
Also published as: CN112693550B

Abstract

A single-tube hollow front fork only adopts a metal tube, and a step with an inclined oblique lathe forming a bearing mounting position is cut and processed, so that the bearing stress is enhanced; the direction of the center line of the front fork vertical pipe and the center line of the bearing is offset beneficially; the side surface of a pipe orifice at the upper end of the front fork is provided with a chute for installing an upper gland of the bowl group; the C-shaped arc-shaped stress structure has a spring shock-absorbing function; the front and back directions of the middle and lower sections are grooved to form two front fork legs; the multifunctional front fork does not need to be welded, stamped or shaped, and the product percent of pass is 100%.

Description

Single-tube hollow front fork and mounting method

Technical Field

The invention relates to a personal walking tool, in particular to a front fork for installing a scooter.

Background

The front fork of the existing scooter is mainly formed by welding a plurality of parts of a vertical pipe and a fork leg, the fork leg is always forward deviated by a certain angle and welded on the vertical pipe in order to adapt to the tracing line, and the front fork has the defects of fragmentary structure, simple and crude appearance, complex processing procedure, high manual manufacturing cost, low cost performance, requirement of a mold, high rejection rate and the like.

Disclosure of Invention

The invention aims to solve the problem of a production mode of a scooter front fork, simplify the production process cost, and can carve a complete shock-absorbing front fork in a hollow way by only adopting a pipe material and combining with modern cutting processing technology, such as water jet cutting or laser cutting. And the lower end of the front fork is provided with a hole for connecting a wheel shaft.

The invention realizes the following functions:

the front fork is formed by cutting a pipe material, and the upper end of the front fork is a vertical pipe area and is used for installing a bearing to be rotatably connected with the frame.

The front fork is obliquely arranged to form a step of a bearing mounting position, so that the bearing stress is enhanced, and the strong impact capability of the front fork is enhanced. The directions of the center line of the front fork vertical pipe and the center line of the bearing are offset beneficially to form an included angle and an angle, an ideal tracing following line of the front wheel is obtained, and the driving direction stability of the vehicle is improved. The angle is greater than 2 degrees.

Under the condition that the outer diameter of the front fork tube is smaller than that of the bearing inner ring, an inclined installation mode is adopted, two semicircular arc wedge-shaped rings are respectively inserted into the upper portion and the lower portion of the bearing and are inserted between the bearing inner ring and the front fork tube, and the bearing position is tightly pressed. The semi-arc wedge-shaped ring is combined to form an arc which is matched with the radian of the outer surface of the front fork vertical pipe, and the bearing is locked at the groove of the front fork vertical pipe. The bearing is tightly installed and tightly combined with the front fork vertical pipe.

The front fork is large in pipe diameter and is provided with a single large-ring bearing. The front fork is provided with only one bearing. The bearing be four point contact ball bearing, effectively reduced mounting height, the flat upper end accords with design aesthetics more.

The invention realizes the second function:

the front fork is formed by cutting a pipe material, and the side surface of the pipe orifice at the upper end of the front fork is provided with at least two inclined grooves. And the upper gland is used for mounting the bowl group bearing. The upper gland is provided with two convex bosses. The boss penetrates through the chute formed in the side face of the pipe orifice, is exposed to act on the upper end of the bearing, and the bearing can be locked by rotating the upper pressing cover.

The invention realizes the third function:

the front fork is formed by cutting a pipe material, a plurality of curve material reducing grooves are formed in the middle section area, a front leg cantilever is reserved, and a bow stress structure is formed; the cantilever of the rear leg is reserved, and a plurality of material reducing grooves are transversely formed to form a wave-shaped spring stress structure, so that the spring shock absorption function is realized. The rear leg cantilever and the spring body of the C-shaped arc stress structure optimize the stress performance.

The invention realizes the fourth function:

the front fork is formed by cutting a pipe material, and grooves are formed in the front and back directions of the middle and lower sections to form two front fork legs for mounting wheels.

The front fork of the invention does not need to be welded, does not need to be stamped and shaped, has the product percent of pass of 100 percent, does not see a little welding trace, and changes the defect that the appearance is influenced by welding scars of products on the market.

Drawings

FIG. 1 is a perspective view of an embodiment of the present invention;

FIG. 2 is a side view plus a cross-sectional view of an embodiment of the present invention;

FIG. 3 is a front view of an embodiment of the present invention;

FIG. 4 is a view of a mounting structure of an embodiment of the present invention;

figure 5 is a top capping view of an embodiment of the present invention.

Wherein: 1. a front fork; 2. bending a bow; 3. a chute; 4. a spring; 5. a step; 6. a bearing; 7. a wedge ring; 8. and (6) pressing a cover.

Detailed Description

The invention is described in further detail below with reference to the accompanying figures 1-5:

the invention adopts a pipe material, and the processing of the shock-absorbing front fork is finished by cutting with a water jet cutter or laser.

Furthermore, the front fork is formed by cutting a steel pipe material, and in the upper end region, the front fork is clamped on a lathe in an inclined mode, and a step of a bearing installation position is formed by inclined turning, so that the beneficial deviation of the direction of the center line of the vertical pipe of the front fork and the center line of the bearing is obtained, and the angle is smaller.

And (3) processing the wedge-shaped ring, namely obliquely clamping the wedge-shaped ring on a lathe, and obliquely turning to form a semi-circular arc wedge-shaped ring. Two semi-circular wedge rings are respectively inserted into the upper part and the lower part of a bearing and are inserted between the inner ring of the bearing and a front fork tube to tightly press the bearing. The bearing is a four-point contact ball bearing.

Furthermore, two inclined grooves are formed in the side face of the pipe orifice at the upper end of the front fork. The upper gland is provided with two convex bosses. The boss penetrates through the chute formed in the side face of the pipe orifice, is exposed to act on the upper end of the bearing, and the bearing can be locked by rotating the upper pressing cover.

Furthermore, a plurality of curve material reducing grooves are formed in the middle section area of the front fork, a front leg cantilever is reserved, and a bow stress structure is formed; the cantilever of the rear leg is reserved, and a plurality of material reducing grooves are transversely formed to form a wave-shaped spring stress structure, so that the spring shock absorption function is realized.

Furthermore, the front and back direction of the middle and lower sections of the front fork are grooved to form two front fork legs for mounting wheels.

Further, the front fork is made of a high-elasticity steel pipe; the front fork is made of a chromium-molybdenum steel pipe.

Claims

1. The utility model provides a single tube fretwork formula front fork which characterized in that: the front fork is formed by cutting a pipe material, the upper end of the front fork is a vertical pipe area and is used for installing a bearing to be rotatably connected with a frame, a plurality of bent damping grooves are formed in the middle section area to form a spring function, and the lower end of the front fork is provided with a hole for connecting a wheel shaft.

2. The method of claim 1, further comprising: the pipe orifice at the upper end of the front fork is provided with a chute for installing an upper gland.

3. The method of claim 1, further comprising: and the upper end of the front fork is obliquely turned to form a step of a bearing mounting position.

4. The method of claim 1, further comprising: and the front leg cantilever of the front fork forms a bow stress structure.

5. The method of claim 1, further comprising: the bearing installed on the front fork is a four-point contact ball bearing.

6. The method of claim 1, further comprising: the middle and lower sections of the front fork are grooved in the front-back direction to form two front fork legs.

7. The utility model provides a single tube fretwork formula front fork which characterized in that: the front fork is formed by cutting a pipe material, the upper end of the front fork is a vertical pipe area, the upper end of the front fork is obliquely turned to form a step of a bearing installation position, the direction of the central line of the vertical pipe and the direction of the central line of the bearing deviate to form an included angle, and an opening at the lower end of the front fork is used for connecting a wheel shaft.

8. The method of claim 7, further comprising: the bearing installed on the front fork is a four-point contact ball bearing.

9. The method of claim 7, further comprising: and two wedge-shaped rings are respectively inserted into the upper part and the lower part of the inner ring of the bearing and between the two wedge-shaped rings and the front fork tube, so that the bearing is installed in a pressing manner.

10. The method of claim 7, further comprising: the included angle is greater than 2 degrees.