CN220208880U

CN220208880U - Moulded case circuit breaker contact extension spring

Info

Publication number: CN220208880U
Application number: CN202321709429.9U
Authority: CN
Inventors: 李顺银; 刘文强; 周旭琼; 蒋雪艳; 何明明
Original assignee: Zhejiang Zhengjiada Spring Co ltd
Current assignee: Zhejiang Zhengjiada Spring Co ltd
Priority date: 2023-07-03
Filing date: 2023-07-03
Publication date: 2023-12-19
Anticipated expiration: 2033-07-03

Abstract

The utility model discloses a moulded case circuit breaker contact tension spring which is simple to assemble and adjustable in tension. The technical scheme adopted comprises the following steps: the adjustable tension spring comprises a first tension spring body and a second tension spring body which are arranged side by side, wherein the upper ends of the first tension spring body and the second tension spring body are connected through connecting rods which are continuous with the first tension spring body and the second tension spring body, the lower ends of the first tension spring body and the second tension spring body are respectively provided with a hook which is continuous with the first tension spring body and the second tension spring body, the connecting rods are provided with adjustable mounting mechanisms, each adjustable mounting mechanism comprises an adjusting screw rod and a connecting piece which is rotatably arranged at the bottom of the adjusting screw rod, and the connecting piece is provided with a hanging groove which is hung with the connecting rod.

Description

Moulded case circuit breaker contact extension spring

Technical Field

The utility model relates to a contact tension spring of a molded case circuit breaker.

Background

Tension springs conventionally applied to molded case circuit breaker contacts are shown in fig. 7: the movable contact consists of two independent tension springs, wherein the lower ends of the tension springs are connected to the connecting shaft of the movable contact of the molded case circuit breaker through hooks, and the hooks at the upper ends are hung on a bracket. When the hook is assembled, the hook at one end is connected, and then the hook at the other end is pried into the connecting part by using tools such as a screwdriver. The disadvantages are: 1. the assembly is needed for two times, and the assembly is troublesome; 2. the tension of the tension spring after assembly is not adjustable, and the use is inflexible.

Disclosure of Invention

The utility model aims to solve the technical problem of providing a moulded case circuit breaker contact tension spring with simple assembly and adjustable tension.

In order to solve the problems, the technical scheme adopted by the utility model comprises the following steps: the side by side sets up first extension spring body, second extension spring body, the upper end of first extension spring body, second extension spring body is connected through rather than self continuous connecting rod, the lower extreme of first extension spring body, second extension spring body all is equipped with rather than self continuous couple, its characterized in that: the connecting rod is provided with an adjustable installation mechanism, the adjustable installation mechanism comprises an adjusting screw rod and a connecting piece rotatably arranged at the bottom of the adjusting screw rod, and the connecting piece is provided with a hanging groove which is hung with the connecting rod.

The molded case circuit breaker contact tension spring is characterized in that: the adjusting screw lower extreme is equipped with the unthreaded section that is used for the riveting, the connecting piece top be equipped with the unthreaded section riveting of adjusting screw usefulness rivet the hole.

The molded case circuit breaker contact tension spring is characterized in that: the center of the connecting rod is bent inwards to form a V-shaped structure, the vertex of the V-shaped structure is positioned on the connecting line of the center points of the first tension spring body and the second tension spring body, and the hanging groove is adaptive to the V-shaped structure.

The molded case circuit breaker contact tension spring is characterized in that: the U-shaped bracket comprises a top plate and side plates arranged on two sides of the top plate, and the adjusting screw is in threaded connection with the screw holes of the top plate.

The molded case circuit breaker contact tension spring is characterized in that: the hooks are respectively positioned on the central lines of the first tension spring body and the second tension spring body.

The molded case circuit breaker contact tension spring is characterized in that: the hook is provided with an opening, and the end part is provided with a guide surface inclined to the opening side.

The molded case circuit breaker contact tension spring is characterized in that: the opening of the hook faces forward.

The molded case circuit breaker contact tension spring is characterized in that: the connecting piece is U-shaped.

The molded case circuit breaker contact tension spring is characterized in that: the bottom of the side plate is provided with a clamping groove.

The molded case circuit breaker contact tension spring has the following advantages: 1. the two tension springs are of an integrated structure and only need to be installed once; 2. during assembly, the adjustable mounting mechanism is firstly mounted on the support of the shell breaker contact, then the hooks at the lower end of the tension springs are respectively hung on the connecting shafts of the shell breaker contact, the connecting rods at the upper end are hung in the hanging grooves of the adjustable mounting mechanism, and finally the tension springs can be tensioned by rotating the adjusting screw rod through the screw driver, so that the assembly is easier, and the tension of the tension springs can be adjusted according to the adjusting screw rod.

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

drawings

Fig. 1 is a schematic view of the structure of a molded case circuit breaker contact tension spring of the present utility model;

FIG. 2 is a side view of a molded case circuit breaker contact tension spring of the present utility model;

FIG. 3 is a top view of the molded case circuit breaker contact tension spring of the present utility model;

FIG. 4 is a schematic diagram of an assembly of a molded case circuit breaker contact tension spring and an adjustable mounting mechanism of the present utility model;

FIG. 5 is a cross-sectional view of the adjustable mounting mechanism of the present utility model;

FIG. 6 is a schematic structural view of a bracket according to the present utility model;

fig. 7 is a schematic diagram of the connection between a conventional tension spring and a molded case circuit breaker contact.

Detailed Description

Referring to fig. 1 to 6, the contact tension spring of the molded case circuit breaker of the present utility model comprises a first tension spring body 1 and a second tension spring body 2 arranged side by side. The upper ends of the first tension spring body 1 and the second tension spring body 2 are connected through a connecting rod 3 which is continuous with the upper ends of the first tension spring body 1 and the second tension spring body 2, and hooks 4 which are continuous with the lower ends of the first tension spring body 1 and the second tension spring body 2 are arranged at the lower ends of the first tension spring body and the second tension spring body. The connecting rod 3 is provided with an adjustable installation mechanism 5, the adjustable installation mechanism 5 comprises an adjusting screw 6 and a connecting piece 7 which is rotatably arranged at the bottom of the adjusting screw 6, and the connecting piece 7 is provided with a hanging groove 8 which is hung with the connecting rod 3.

Preferably, the lower end of the adjusting screw 6 is provided with a non-threaded section 9 for riveting, and the top of the connecting piece 7 is provided with a riveting hole 10 for riveting with the non-threaded section 9 of the adjusting screw 6. The rotatable connection between the adjusting screw 6 and the connecting piece 7 is achieved by the riveting between the unthreaded section 9 and the riveting hole 10.

Preferably, the center of the connecting rod 3 is bent inwards to form a V-shaped structure 11, the vertex 12 of the V-shaped structure 11 is located on a connecting line 13 of the center points of the first tension spring body 1 and the second tension spring body 2, and the hooking groove 8 is adapted to the V-shaped structure 11. The hooks 4 are respectively positioned on the central lines 18 of the first tension spring body 1 and the second tension spring body 2. After the structure is adopted, the stress points at the two ends of the tension spring are on the same plane, so that the stress is more uniform, and the stability of the action of the movable contact of the shell breaker is ensured.

Preferably, the U-shaped bracket 14 is further included, the U-shaped bracket 14 includes a top plate 15 and side plates 16 disposed at two sides of the top plate 15, and the adjusting screw 6 is screwed on the screw hole 21 of the top plate 15. The U-shaped bracket 14 is mounted on the housing circuit breaker movable contact to facilitate assembly of the adjustable mounting mechanism 5. The bottom of the side plate 16 is provided with a clamping groove 17, and after the U-shaped bracket 14 is installed, the clamping groove 17 at the bottom of the U-shaped bracket is clamped on the shell of the shell breaker moving contact, so that the installation stability is improved.

Preferably, the hook 4 is provided with an opening 19, and a guide surface 20 inclined toward the opening 19 is provided at an end portion thereof. When the hook is assembled, the opening 19 and the guide surface 20 are aligned with the connecting shaft, and pressure is applied, so that the hook can be easily assembled.

Preferably, the opening 19 of the hook 4 faces forward for easy installation.

Preferably, the connecting piece 7 is U-shaped and is integrally formed by stamping from a metal plate, so as to facilitate production and assembly.

Although the present utility model has been described with respect to preferred embodiments, it will be understood by those skilled in the art that various changes and modifications can be made without departing from the scope of the utility model, and the utility model is not limited to the specific embodiments described above, but is intended to cover all modifications, equivalents and alternatives falling within the scope of the utility model.

Claims

1. The utility model provides a moulded case circuit breaker contact extension spring, includes and sets up first extension spring body (1), second extension spring body (2) side by side, the upper end of first extension spring body (1), second extension spring body (2) is connected through connecting rod (3) continuous with itself, the lower extreme of first extension spring body (1), second extension spring body (2) all is equipped with couple (4) continuous with itself, its characterized in that: the adjustable mounting mechanism (5) is arranged on the connecting rod (3), the adjustable mounting mechanism (5) comprises an adjusting screw (6) and a connecting piece (7) rotatably arranged at the bottom of the adjusting screw (6), and a hanging groove (8) which is hung with the connecting rod (3) is formed in the connecting piece (7).

2. The molded case circuit breaker contact tension spring of claim 1, wherein: the lower end of the adjusting screw (6) is provided with a non-threaded section (9) for riveting, and the top of the connecting piece (7) is provided with a riveting hole (10) for riveting with the non-threaded section (9) of the adjusting screw (6).

3. The molded case circuit breaker contact tension spring of claim 1, wherein: the center of the connecting rod (3) is bent inwards to form a V-shaped structure (11), the top point (12) of the V-shaped structure (11) is located on a central point connecting line (13) of the first tension spring body (1) and the second tension spring body (2), and the hanging groove (8) is matched with the V-shaped structure (11).

4. The molded case circuit breaker contact tension spring of claim 1, wherein: the novel adjustable screw is characterized by further comprising a U-shaped bracket (14), wherein the U-shaped bracket (14) comprises a top plate (15) and side plates (16) arranged on two sides of the top plate (15), and the adjusting screw (6) is in threaded connection with a screw hole (21) of the top plate (15).

5. The molded case circuit breaker contact tension spring of claim 1, wherein: the hooks (4) are respectively positioned on the central lines (18) of the first tension spring body (1) and the second tension spring body (2).

6. The molded case circuit breaker contact tension spring of claim 1, wherein: the hook (4) is provided with an opening (19), and the end part is provided with a guide surface (20) inclined to the opening (19) side.

7. The molded case circuit breaker contact tension spring of claim 1, wherein: the opening (19) of the hook (4) faces forward.

8. The molded case circuit breaker contact tension spring of claim 1, wherein: the connecting piece (7) is U-shaped.

9. The molded case circuit breaker contact tension spring of claim 4, wherein: the bottom of the side plate (16) is provided with a clamping groove (17).