CN215567578U

CN215567578U - Double-extension spring

Info

Publication number: CN215567578U
Application number: CN202122243650.7U
Authority: CN
Inventors: 周旭琼
Original assignee: Zhejiang Zhengjiada Spring Co ltd
Current assignee: Zhejiang Zhengjiada Spring Co ltd
Priority date: 2021-09-16
Filing date: 2021-09-16
Publication date: 2022-01-18
Anticipated expiration: 2031-09-16

Abstract

The utility model discloses a double-extension spring with uniform stress and good stability. The technical scheme adopted comprises the following steps: first extension spring, the second extension spring that the interval set up, first extension spring, second extension spring's upper end is connected through rather than self continuous connecting rod, first extension spring, second extension spring's lower extreme all is equipped with rather than self continuous couple, its characterized in that: the center of the connecting rod is provided with a first central stress point through bending, and the first central stress point is positioned on a central line between the first extension spring and the second extension spring. The advantages are that: stress points between the connecting rod and the first extension spring and between the connecting rod and the second extension spring and stress points between the hook and the first extension spring and between the hook and the second extension spring are all arranged on a central line, so that the stress is more uniform, the stability is better after the installation, and the high-precision matching of the circuit breaker can be improved.

Description

Double-extension spring

Technical Field

The utility model relates to a double-extension spring.

Background

The double-extension spring is mainly applied to the circuit breaker, and the traditional double-extension spring structure is shown as the Chinese utility model patent with the publication number of "CN 204828418U" and the name of "spring". The concrete structure includes: the first extension spring and the second extension spring are arranged at intervals, the upper ends of the first extension spring and the second extension spring are connected with the connecting rods which are continuous with the first extension spring and the second extension spring, and hooks which are continuous with the first extension spring and the second extension spring are arranged at the lower ends of the first extension spring and the second extension spring. The application of traditional double-extension spring structure on the circuit breaker is as shown in the Chinese utility model patent with the name of "CN 101030506A" and "contact system of circuit breaker" announced by the authority, and the connecting rod of double-extension spring is connected with the moving contact of circuit breaker, and the couple of double-extension spring is connected with the pivot of circuit breaker. There are disadvantages in that: because the stress points between the connecting rod and the first extension spring and the second extension spring and the stress points between the hook and the first extension spring and the second extension spring are not on the same straight line, the stress is uneven and the stability is poor, so that the requirements of the existing high-precision circuit breaker can not be met.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a double-extension spring with uniform stress and good stability.

In order to solve the above problems, the technical scheme adopted by the utility model comprises: first extension spring, the second extension spring that the interval set up, first extension spring, second extension spring's upper end is connected through rather than self continuous connecting rod, first extension spring, second extension spring's lower extreme all is equipped with rather than self continuous couple, its characterized in that: the center of the connecting rod is provided with a first central stress point through bending, and the first central stress point is positioned on a central line between the first extension spring and the second extension spring.

The double-extension spring is characterized in that: the top parts of the hooks of the first extension spring and the second extension spring are respectively provided with a second central stress point through bending, and the second central stress point is also positioned on the central line between the first extension spring and the second extension spring.

The double-extension spring is characterized in that: the bending included angle alpha of the connecting rod is 140-160 degrees.

The double-extension spring is characterized in that: the bending included angle alpha of the connecting rod is 150 degrees.

The double-extension spring is characterized in that: an opening is formed in one side of the hook.

Compared with the prior art, the utility model has the following advantages: stress points between the connecting rod and the first extension spring and between the connecting rod and the second extension spring and stress points between the hook and the first extension spring and between the hook and the second extension spring are all arranged on a central line, so that the stress is more uniform, the stability is better after the installation, and the high-precision matching of the circuit breaker can be improved.

The utility model is further described below with reference to the accompanying drawings.

Drawings

FIG. 1 is a schematic structural view of a dual extension spring according to the present invention;

FIG. 2 is a top view of the dual extension spring of the present invention;

fig. 3 is a bottom view of the double tension spring of the present invention.

Detailed Description

Referring to fig. 1 to 3, the double tension spring of the present invention includes a first tension spring 1 and a second tension spring 2 which are spaced apart from each other. The upper ends of the first extension spring 1 and the second extension spring 2 are connected through a connecting rod 3 which is continuous with the first extension spring and the second extension spring. The lower ends of the first extension spring 1 and the second extension spring 2 are both provided with a hook 4 which is continuous with the first extension spring and the second extension spring. The center of the connecting rod 3 is provided with a first central stress point 5 through bending, and the first central stress point 5 is positioned on a central line 6 between the first extension spring 1 and the second extension spring 2. The length of the link 3 is desirably the sum of the outer diameters of the first and

second tension springs

1 and 2. In use, said first central stressed point 5 is stressed on the moving contact of the circuit breaker.

Preferably, a second central force bearing point 7 is formed on the top of each hook 4 of the first extension spring 1 and the second extension spring 2 through bending, and the second central force bearing point 7 is also located on a central line 6 between the first extension spring 1 and the second extension spring 2. And the second central force bearing point 7 is located on the central points of the first extension spring 1 and the second extension spring 2. In use, the second central force point 7 is forced on the pivot of the circuit breaker.

Preferably, the bending included angle α of the connecting rod 3 is 140 ° to 160 °, and most preferably, the bending included angle α is 150 °. To achieve the best balancing effect.

Preferably, an opening 8 is formed in one side of the hook 4 to facilitate the hooking of the hook 4.

Although the present invention has been described with reference to particular embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the utility model as defined by the appended claims.

Claims

1. The utility model provides a double tension spring, includes first extension spring (1), second extension spring (2) that the interval set up, the upper end of first extension spring (1), second extension spring (2) is connected through connecting rod (3) rather than self is continuous, the lower extreme of first extension spring (1), second extension spring (2) all is equipped with rather than self continuous couple (4), its characterized in that: the center of the connecting rod (3) is provided with a first center stress point (5) through bending, and the first center stress point (5) is positioned on a center line (6) between the first extension spring (1) and the second extension spring (2).

2. The double tension spring as claimed in claim 1, wherein: the top parts of the hooks (4) of the first extension spring (1) and the second extension spring (2) are respectively provided with a second central stress point (7) through bending, and the second central stress point (7) is also positioned on a central line (6) between the first extension spring (1) and the second extension spring (2).

3. The double tension spring as claimed in claim 1, wherein: the bending included angle alpha of the connecting rod (3) is 140-160 degrees.

4. The double tension spring as claimed in claim 3, wherein: the bending included angle alpha of the connecting rod (3) is 150 degrees.

5. The double tension spring as claimed in claim 1, wherein: an opening (8) is formed in one side of the hook (4).