CN214404467U

CN214404467U - Two air chamber atmospheric pressure front fork devices of climbing bicycle

Info

Publication number: CN214404467U
Application number: CN202120200450.0U
Authority: CN
Inventors: 邹日; 刘林
Original assignee: Shenzhen Yongdinghong Technology Co ltd
Current assignee: Shenzhen Yongdinghong Technology Co ltd
Priority date: 2021-01-25
Filing date: 2021-01-25
Publication date: 2021-10-15
Anticipated expiration: 2031-01-25

Abstract

The utility model discloses a mountain bike double-air-chamber air pressure front fork device, which comprises a shell, wherein the shell is provided with a sealing sleeve, the sealing sleeve is provided with a third groove, a sealing ring is fixedly arranged on the third groove, the sealing sleeve is provided with a first groove and a second groove, the first groove is provided with a movable sleeve, the second groove is provided with a limiting ring, the limiting ring is fixedly provided with a piston rod, the top of the piston rod passes through a piston, the piston rod is fixedly provided with a snap spring, rebound rubber is arranged between the piston and the sealing sleeve, the top of the rebound rubber is contacted with the piston, the bottom of the rebound rubber is contacted with the sealing sleeve, the rebound rubber is sleeved on the piston rod, the piston is separated from the piston rod, the air pressure of two air chambers can be balanced by only pressurizing an upper air chamber, and better performance is realized under the condition that the number of parts is the same as that of the existing single air chamber, compared with the existing double-air-chamber front fork, the number of parts is reduced by 50%, the reliability is improved, and the cost is reduced.

Description

Two air chamber atmospheric pressure front fork devices of climbing bicycle

Technical Field

The utility model relates to a climbing bicycle field especially relates to a two air chamber atmospheric pressure front fork devices of climbing bicycle.

Background

The mountain bike is a bicycle specially designed for cross-country (hills, small-diameter, fields and sand gravel roads) walking, and is born in san Francisco of the west of America in nine-seven years.

The existing pneumatic front fork of the mountain bike is mainly divided into a single air chamber and a double air chamber; the single-air-chamber front fork has simple structure and low cost, but has slow shock absorption response due to the static friction force of the sealing ring; the double-air-chamber front fork has the advantages that the air chamber with the same air pressure is additionally arranged on the back of the air chamber of the single-air-chamber front fork, so that when the piston is started, the air pressure supporting force is zero, and the shock-absorbing response of the front fork is only required to be sensitive to static friction force resistance.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a climbing bicycle double air chamber atmospheric pressure front fork device to solve above-mentioned technical problem.

The utility model discloses a solve above-mentioned technical problem, adopt following technical scheme to realize:

a pneumatic front fork device with double air chambers for a mountain bike comprises a shell, wherein the bottom of the shell is provided with a sealing sleeve, the top of the sealing sleeve extends into the shell, a third groove is arranged on the outer surface of the sealing sleeve, a sealing ring is fixedly arranged in the third groove, a first groove and a second groove are arranged in the sealing sleeve, a movable sleeve is arranged in the first groove, a limiting ring is arranged in the second groove, a piston rod is fixedly arranged in the limiting ring, the top of the piston rod passes through the sealing sleeve and extends to the upper part of the sealing sleeve, the top of the piston rod passes through the piston, the piston is connected with the shell in a sliding way, the top of the piston rod is fixedly provided with a snap spring, rebound rubber is arranged between the piston and the sealing sleeve, the top of the rebound rubber is in contact with the piston, the bottom of the rebound rubber is in contact with the sealing sleeve, and the rebound rubber is sleeved on the piston rod.

Preferably, the bottom end of the piston rod is internally connected with a bolt in a threaded manner, and the bottom end of the bolt is positioned on the outer side of the piston rod.

Preferably, a top cover is inserted at the top of the shell.

Preferably, the clamp spring is made of stainless steel.

Preferably, the first groove is T-shaped, the second groove is annular, and the second groove is located below the first groove.

Preferably, the top of the piston rod is conical.

The utility model has the advantages that:

1. by separating the piston and the piston rod, the air pressure of the two air chambers can be balanced by pressurizing the upper air chamber only.

2. Better performance is achieved with the existing single air chamber without the same number of parts.

3. Compared with the existing double-air-chamber front fork, the number of parts is reduced by 50%, the reliability is improved, and the cost is reduced.

Drawings

Fig. 1 is a schematic structural view of the present invention;

FIG. 2 is an enlarged view of part A of FIG. 1 according to the present invention;

reference numerals: 1-a piston; 2-rebound rubber; 3-a piston rod; 4-a clamp spring; 5-a housing; 6-a first groove; 7-sealing sleeve; 8-a second groove; 9-a limiting ring; 10-a movable sleeve; 11-a top cover; 12-a bolt; 13-a sealing ring; 14-third groove.

Detailed Description

In order to make the technical means, the creation features, the achievement purposes and the functions of the present invention easy to understand, the present invention will be further explained below with reference to the following embodiments and the accompanying drawings, but the following embodiments are only the preferred embodiments of the present invention, and not all embodiments are included. Based on the embodiments in the implementation, other embodiments obtained by those skilled in the art without any creative work belong to the protection scope of the present invention.

Specific embodiments of the present invention will be described below with reference to the accompanying drawings.

As shown in fig. 1-2, a pneumatic front fork device with two air chambers for a mountain bike comprises a housing 5, a top cover 11 is inserted into the top of the housing 5, a sealing sleeve 7 is installed at the bottom of the housing 5, the top of the sealing sleeve 7 extends into the housing 5, a third groove 14 is formed in the outer surface of the sealing sleeve 7, a sealing ring 13 is fixedly arranged in the third groove 14, a first groove 6 and a second groove 8 are formed in the sealing sleeve 7, a movable sleeve 10 is arranged in the first groove 6, the first groove 6 is of a T shape, the second groove 8 is of a ring shape, the second groove 8 is positioned below the first groove 6, a limiting ring 9 is arranged in the second groove 8, a piston rod 3 is fixedly arranged in the limiting ring 9, a bolt 12 is connected to the bottom of the piston rod 3 through a thread, the bottom of the bolt 12 is positioned outside the piston rod 3, the top of the piston rod 3 passes through the sealing sleeve 7 and extends to the top of the piston rod 7, the top of the piston rod 3 passes through the piston 1, piston 1 and 5 sliding connection of shell, 3 tops of piston rod have set firmly jump ring 4, jump ring 4 is the stainless steel material, is provided with bounce-back rubber 2 between piston 1 and the seal cover 7, and 2 tops of bounce-back rubber contact with piston 1, and 2 bottoms of bounce-back rubber contact with seal cover 7, and 2 covers of bounce-back rubber are established on

piston rod

3, and 3 tops of piston rod are the toper.

The working principle is as follows: the piston 1 is separated from the piston rod 3, and the cutting piston 1 can move up and down within a certain distance of the piston rod 3.

When the space above the piston 1 is inflated, the rebound rubber 2 props against the lower surface of the piston 1 to fix the piston, the piston rod 3 continues to move downwards due to pressure until the limiting clamp spring 4 is contacted with the piston 1, and at the moment, the conical surface of the piston rod 3 is separated from the upper surface and the lower surface of the sealing ring piston 1 to conduct air pressure balance.

When the shock absorber works, the piston rod 3 moves the piston 1 upwards and is stopped at the original position due to the fact that the friction force of the sealing ring 13 is larger, the piston rod 3 continues to move upwards, the conical surface of the piston rod 3 is blocked with the upper air chamber and the lower air chamber of the piston 1 in a sealing mode, and the shock absorber works normally.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It should be understood by those skilled in the art that the present invention is not limited by the above embodiments, and the description in the above embodiments and the description is only preferred examples of the present invention, and is not intended to limit the present invention, and that the present invention can have various changes and modifications without departing from the spirit and scope of the present invention, and these changes and modifications all fall into the scope of the claimed invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides a two air chamber atmospheric pressure front fork devices of climbing bicycle, includes shell (5), its characterized in that: the sealing sleeve is characterized in that a sealing sleeve (7) is installed at the bottom of the shell (5), the top of the sealing sleeve (7) extends into the shell (5), a third groove (14) is formed in the outer surface of the sealing sleeve (7), a sealing ring (13) is fixedly arranged in the third groove (14), a first groove (6) and a second groove (8) are formed in the sealing sleeve (7), a movable sleeve (10) is arranged in the first groove (6), a limiting ring (9) is arranged in the second groove (8), a piston rod (3) is fixedly arranged in the limiting ring (9), the top of the piston rod (3) penetrates through the sealing sleeve (7) and extends above the sealing sleeve (7), the top of the piston rod (3) penetrates through the piston (1), the piston (1) is connected with the shell (5) in a sliding manner, a clamping spring (4) is fixedly arranged at the top of the piston rod (3), rebound rubber (2) is arranged between the piston (1) and the sealing sleeve (7), the top of the rebound rubber (2) is in contact with the piston (1), the bottom of the rebound rubber (2) is in contact with the sealing sleeve (7), and the rebound rubber (2) is sleeved on the piston rod (3).

2. The mountain bike double-chamber pneumatic front fork device as claimed in claim 1, wherein: the inner thread of the bottom end of the piston rod (3) is connected with a bolt (12), and the bottom end of the bolt (12) is located on the outer side of the piston rod (3).

3. The mountain bike double-chamber pneumatic front fork device as claimed in claim 1, wherein: the top of the shell (5) is inserted with a top cover (11).

4. The mountain bike double-chamber pneumatic front fork device as claimed in claim 1, wherein: the clamp spring (4) is made of stainless steel.

5. The mountain bike double-chamber pneumatic front fork device as claimed in claim 1, wherein: the first groove (6) is T-shaped, the second groove (8) is annular, and the second groove (8) is located below the first groove (6).

6. The mountain bike double-chamber pneumatic front fork device as claimed in claim 1, wherein: the top of the piston rod (3) is conical.