CN220439531U - Auxiliary contact and circuit breaker - Google Patents

Abstract

The utility model belongs to the technical field of piezoelectric devices, and discloses an auxiliary contact and a circuit breaker. The auxiliary contact comprises a shell, a handle part and an operating mechanism, wherein the handle part is rotatably arranged on the shell. The operating mechanism comprises a first lever and a reset torsion spring, and the first lever is rotatably arranged on the shell. A preset gap is arranged between the first lever and the shell, a first limiting protrusion is arranged on the shell, and the reset torsion spring is propped against one end of the first lever and is supported on the first limiting protrusion so as to limit the reset torsion spring to be clamped into the preset gap. The auxiliary contact can avoid the slide buckle of the operating mechanism in the working process, and improves the working stability of the auxiliary contact.

Description

Auxiliary contact and circuit breaker

Technical Field

The utility model relates to the technical field of piezoelectric devices, in particular to an auxiliary contact and a circuit breaker.

Background

Auxiliary contacts are the most common type of electrical device in the auxiliary units of circuit breakers. The auxiliary contact is used for indicating the breaking/closing state of the breaker, and the working principle is as follows: the indication is controlled by the on/off switching of the auxiliary contact, so that the on/off of an auxiliary control circuit is controlled by utilizing the three states of breaking, closing and tripping of the circuit breaker.

The auxiliary contact comprises three wiring terminals, an elastic sheet and an operating mechanism, wherein the operating mechanism drives the elastic sheet to act so as to enable the elastic sheet to be electrically connected with different wiring terminals. The operating mechanism often has the problem of sliding buckles in the working process, so that the auxiliary contact works abnormally and cannot be normally opened.

Accordingly, there is a need for improvements in auxiliary contacts and circuit breakers that address the above issues.

Disclosure of Invention

The first object of the present utility model is to provide an auxiliary contact, which can avoid the occurrence of sliding buckle of an operating mechanism during the working process, and improve the working stability of the auxiliary contact.

To achieve the purpose, the utility model adopts the following technical scheme:

an auxiliary contact, comprising:

a housing;

a handle part rotatably arranged on the shell;

the operating mechanism comprises a first lever and a reset torsion spring, and the first lever is rotatably arranged on the shell;

the novel reset torsion spring is characterized in that a preset gap is formed between the first lever and the shell, a first limiting protrusion is arranged on the shell, and the reset torsion spring is propped against one end of the first lever and is supported on the first limiting protrusion so as to limit the reset torsion spring to be clamped into the preset gap.

As an alternative, one end of the first limiting protrusion is provided as an inclined plane, and the reset torsion spring is assembled to the supporting surface of the first limiting protrusion along the inclined plane.

As an alternative scheme, be provided with reference column and fixture block on the casing, reset torsion spring cover is located on the reference column, the outer peripheral face of reference column is provided with first card arch, first card is protruding to be used for restricting reset torsion spring breaks away from the reference column, be provided with the draw-in groove on the fixture block, reset torsion spring keep away from the one end joint limit of first lever is located in the draw-in groove.

Alternatively, a second clamping protrusion is arranged on the first lever, and the second clamping protrusion is used for limiting the reset torsion spring to be separated from the first lever.

Alternatively, the operating mechanism further includes:

the rocker arm is rotationally connected to the shell, the first lever is in butt joint with the rocker arm so as to push the rocker arm to rotate, one end of the reset tension spring is connected to the shell, the other end of the reset tension spring is connected to the rocker arm, the rocker arm can overcome the tension of the reset tension spring to be pushed by the first lever to rotate, and the rocker arm can reversely rotate under the action of the tension of the reset tension spring.

Alternatively, the auxiliary contact further includes:

the rocker arm can drive the elastic piece to move, so that the elastic piece is selectively and electrically connected with the first wiring terminal or the second wiring terminal.

Alternatively, the handle portion includes:

the operating handle is rotationally arranged on the shell, and extends out of the shell;

the second lever is rotatably arranged on the shell and is abutted against the first lever;

the connecting rod, the one end of connecting rod is connected operating handle, the other end of connecting rod is connected the second lever, operating handle rotates can through the connecting rod promotes the second lever rotates, so that the second lever supports to press the first lever rotates.

Alternatively, the housing includes a base plate, the operating mechanism is disposed on the base plate, and a second limiting protrusion is disposed on the base plate and configured to limit a rotation angle of the first lever.

A second object of the present utility model is to provide a circuit breaker with improved operational stability and safety.

To achieve the purpose, the utility model adopts the following technical scheme:

the circuit breaker comprises a main body circuit breaker and further comprises the auxiliary contact, wherein the auxiliary contact is connected to the outer side of the main body circuit breaker, the first lever is connected with the trip link of the main body circuit breaker, and the handle part is connected with the handle of the main body circuit breaker.

Alternatively, the auxiliary contact is connected with the main body breaker in a clamping way.

The beneficial effects are that:

according to the auxiliary contact, the first limiting bulge is arranged on the shell, so that the reset torsion spring is supported on the first limiting bulge, the reset torsion spring is avoided from being clamped into the preset gap between the first lever and the shell, the reset torsion spring is ensured to always prop against the first lever, the operating mechanism is prevented from sliding in the working process, and the working stability of the auxiliary contact is improved.

The circuit breaker provided by the utility model improves the working stability and the safety by adopting the auxiliary contact.

Drawings

Fig. 1 is a schematic structural view of an auxiliary contact according to an embodiment of the present utility model;

fig. 2 is a schematic diagram of an internal structure of an auxiliary contact according to an embodiment of the present utility model;

FIG. 3 is an enlarged block diagram of FIG. 2 at A;

FIG. 4 is a schematic view of the internal structure of an auxiliary contact (rocker arm removed) provided by an embodiment of the present utility model;

fig. 5 is a schematic diagram of an internal structure of an auxiliary contact according to an embodiment of the present utility model.

In the figure:

1. a housing; 11. the first limiting protrusion; 111. an inclined plane; 12. positioning columns; 121. the first clamping protrusion; 13. a clamping block; 131. a clamping groove; 14. a substrate; 141. the second limiting bulge;

2. a handle portion; 21. an operation handle; 211. a handle link; 22. a second lever; 221. a connection hole; 222. a third rotating shaft; 23. a connecting rod;

3. an operating mechanism; 31. a first lever; 310. presetting a gap; 311. the second clamping protrusion; 312. a connecting column; 313. a first rotating shaft; 32. a reset torsion spring; 33. a rocker arm; 331. a limit groove; 332. a second rotating shaft; 34. resetting the tension spring;

41. a first connection terminal; 42. a second connection terminal; 43. a third connection terminal; 44. and the elastic sheet.

Detailed Description

The utility model is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the utility model and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present utility model are shown in the drawings.

In the description of the present utility model, unless explicitly stated and limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "left", "right", and the like are orientation or positional relationships based on those shown in the drawings, merely for convenience of description and simplicity of operation, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the utility model. Furthermore, the terms "first," "second," and the like, are used merely for distinguishing between descriptions and not for distinguishing between them.

As shown in fig. 1 to 3, the present embodiment provides an auxiliary contact, which includes a housing 1, a handle portion 2 and an operating mechanism 3, wherein the handle portion 2 is rotatably disposed on the housing 1, the operating mechanism 3 includes a first lever 31 and a return torsion spring 32, and the first lever 31 is rotatably disposed on the housing 1. A preset gap 310 is arranged between the first lever 31 and the housing 1, a first limiting protrusion 11 is arranged on the housing 1, and the reset torsion spring 32 is propped against one end of the first lever 31 and is supported on the first limiting protrusion 11 so as to limit the reset torsion spring 32 to be clamped into the preset gap 310. Specifically, the housing 1 is fixedly provided with a first shaft 313, the first lever 31 is rotatably connected to the first shaft 313, and the first lever 31 rotates about the first shaft 313 as a rotation center.

As shown in fig. 4, in order to facilitate the installation of the operating mechanism 3 and the second lever 22, the housing 1 includes a base plate 14, the operating mechanism 3 is disposed on the base plate 14 such that a first rotation shaft 313, a first limit projection 11, a reset torsion spring 32, and the like are disposed on the base plate 14, and a second limit projection 141 is disposed on the base plate 14, the second limit projection 141 being configured to limit the rotation angle of the first lever 31 to prevent the first lever 31 from excessively rotating clockwise or counterclockwise. Of course, the housing 1 may not be provided with the substrate 14, and the mounting of the operating mechanism 3 and the second lever 22 may be realized even if the housing 1 has a unitary structure and the inner wall is flat.

The handle portion 2 can press the first lever 31 to rotate the first lever 31 to the first station, and when the handle portion 2 releases the pressing of the first lever 31, the return torsion spring 32 presses the first lever 31 to rotate the first lever 31 to the second station.

In order to prevent friction between the first lever 31 and the shell 1 in the rotation process of the first lever 31, a preset gap 310 is formed between the first lever 31 and the shell 1, and the reset torsion spring 32 is clamped into the preset gap 310 to lose elasticity, and the reset torsion spring 32 is supported on the first limit protrusion 11 by arranging the first limit protrusion 11 on the shell 1, so that the reset torsion spring 32 is avoided from being clamped into the preset gap 310 between the first lever 31 and the shell 1, the reset torsion spring 32 is prevented from being always propped against the first lever 31, and the operating mechanism 3 is prevented from sliding in the working process, so that the working stability of an auxiliary contact is improved.

Alternatively, as shown in fig. 3, one end of the first limiting protrusion 11 is provided as a slope 111, and one end of the return torsion spring 32 is assembled to the supporting surface of the first limiting protrusion 11 along the slope 111, so that the assembly of the return torsion spring 32 is facilitated.

As shown in fig. 3 and 4, in order to fix the reset torsion spring 32, the casing 1 is provided with a positioning column 12 and a clamping block 13, the reset torsion spring 32 is sleeved on the positioning column 12, the outer circumferential surface of the positioning column 12 is provided with a first clamping protrusion 121, the first clamping protrusion 121 is used for limiting the reset torsion spring 32 to be separated from the positioning column 12, the clamping block 13 is provided with a clamping groove 131, and one end, far away from the first lever 31, of the reset torsion spring 32 is clamped and limited in the clamping groove 131. The reset torsion spring 32 is sleeved on the positioning column 12 to fix, and the first clamping protrusion 121 can prevent the reset torsion spring 32 from being separated from the positioning column 12. One end of the reset torsion spring 32 is clamped in the clamping groove 131, the other end of the reset torsion spring 32 abuts against the first lever 31, and when the handle part 2 does not apply pressure to the first lever 31, the first lever 31 rotates clockwise under the elastic force of the reset torsion spring 32.

As shown in fig. 3, in order to further improve the stability of the return torsion spring 32, the first lever 31 is provided with a second clamping protrusion 311, and the second clamping protrusion 311 is used for limiting the return torsion spring 32 to separate from the first lever 31, so that the return torsion spring 32 always keeps abutting against the first lever 31.

Further, as shown in fig. 2, the operating mechanism 3 further includes a rocker arm 33 and a return tension spring 34, the rocker arm 33 is rotatably connected to the housing 1, the first lever 31 is abutted against the rocker arm 33 to push the rocker arm 33 to rotate, one end of the return tension spring 34 is connected to the housing 1, the other end of the return tension spring 34 is connected to the rocker arm 33, the rocker arm 33 can be pushed by the first lever 31 to rotate against the tension of the return tension spring 34, and can reversely rotate under the action of the tension of the return tension spring 34. That is, when the first lever 31 rotates to the second position, the rocker arm 33 is rotated by the first lever 31 against the tension of the return tension spring 34, and when the first lever 31 rotates to the first position, the rocker arm 33 is reversely rotated by the tension of the return tension spring 34. Specifically, the housing 1 is provided with a second rotating shaft 332, and the rocker arm 33 is rotatably provided on the second rotating shaft 332, and the rocker arm 33 rotates about the second rotating shaft 33 as a rotation center.

Further, as shown in fig. 2, the auxiliary contact further includes a first connecting terminal 41, a second connecting terminal 42 and a third connecting terminal 43, the third connecting terminal 43 is connected with a spring piece 44, the rocker 33 can drive the spring piece 44 to move, so that the spring piece 44 is selectively electrically connected with the first connecting terminal 41 or the second connecting terminal 42, when the first lever 31 rotates to the first station, the spring piece 44 is electrically connected with the second connecting terminal 42, and when the first lever 31 rotates to the second station, the spring piece 44 is electrically connected with the first connecting terminal 41.

Specifically, referring to fig. 5, the end of the rocker arm 33 is provided with a limit groove 331, the elastic piece 44 is clamped in the limit groove 331 and can move in the limit groove 331, and when the rocker arm 33 rotates in place anticlockwise, the rocker arm 33 pulls the elastic piece 44 to move to be connected with the second connecting terminal 42; when the swing arm 33 rotates clockwise, the spring piece 44 is returned to the natural state and connected to the first connection terminal 41.

Alternatively, as shown in fig. 4, the handle portion 2 includes an operation handle 21, a second lever 22, and a link 23, the operation handle 21 is rotatably provided to the housing 1, and the operation handle 21 protrudes outside the housing 1. The second lever 22 is rotatably disposed on the housing 1, and the second lever 22 abuts against the first lever 31. One end of the connecting rod 23 is connected with the operating handle 21, the other end of the connecting rod 23 is connected with the second lever 22, and the operating handle 21 can push the second lever 22 to rotate through the connecting rod 23, so that the second lever 22 can resist the first lever 31 to rotate. Specifically, the operation handle 21 and the second lever 22 are provided with connection holes 221, and the end of the connecting rod 23 is inserted into the connection holes 221 to be connected and fixed. Specifically, the housing 1 is provided with a third rotating shaft 222, the second lever 22 is rotatably disposed on the third rotating shaft 222, and the second lever 22 rotates about the third rotating shaft 222 as a rotation center.

In fig. 2, the auxiliary contact is in a switching-off state, when the auxiliary contact is switched off, the operating handle 21 is pushed to the left, in the process, the connecting rod 23 pulls the second lever 22 to rotate clockwise, the rotating radius of the contact point between the second lever 22 and the first lever 31 is gradually reduced, the first lever 31 rotates clockwise under the action of the elasticity of the reset torsion spring 32, the rocker arm 33 is pushed by the first lever 31 to rotate clockwise, and the elastic sheet 44 rebounds leftwards to be electrically connected with the first wiring terminal 41.

When the auxiliary contact is switched on, the operating handle 21 is pushed to the right, the connecting rod 23 pushes the second lever 22 to rotate anticlockwise, the rotating radius of the abutting point of the second lever 22 and the first lever 31 is gradually increased, the first lever 31 is pressed by the second lever 22 to rotate anticlockwise, the rocker arm 33 rotates anticlockwise under the pulling force of the reset tension spring 34, and the elastic sheet 44 is pressed by the rocker arm 33 to move to the right to be electrically connected with the second wiring terminal 42.

The embodiment also provides a circuit breaker, which comprises a main body circuit breaker and the auxiliary contact, wherein the auxiliary contact is connected to the outer side of the main body circuit breaker, the first lever 31 is connected with the trip link of the main body circuit breaker, and the handle part 2 is connected with the handle of the main body circuit breaker. The circuit breaker improves the working stability and the safety by adopting the auxiliary contact.

Specifically, as shown in fig. 4, a handle connecting rod 211 is disposed on the operating handle 21, a slot is correspondingly disposed on the handle of the main body breaker, and the handle connecting rod 211 can be inserted into the slot to connect, so as to realize synchronous opening and closing of the auxiliary contact and the main body breaker. The first lever 31 further includes a connection post 312, and the connection post 312 extends out of the housing 1 to be interlocked with an operation mechanism of the main body circuit breaker.

Because the first lever 31 is connected with the trip link of the main body circuit breaker, when the electric leakage fault occurs in the circuit, the main body circuit breaker can drive the first lever 31 to rotate while being disconnected, so that the elastic sheet 44 is disconnected with the second wiring terminal 42, and the failure state of the main body circuit breaker can be consistent under the condition that the operating handle 21 is not disconnected.

Optionally, the auxiliary contact is connected with the main body breaker through clamping, so that the assembly is rapid and convenient.

It is to be understood that the above examples of the present utility model are provided for clarity of illustration only and are not limiting of the embodiments of the present utility model. Various obvious changes, rearrangements and substitutions can be made by those skilled in the art without departing from the scope of the utility model. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the utility model are desired to be protected by the following claims.

Claims (10)

1. Auxiliary contact, its characterized in that includes:

a housing (1);

a handle part (2) rotatably arranged on the housing (1);

the operating mechanism (3) comprises a first lever (31) and a reset torsion spring (32), and the first lever (31) is rotatably arranged on the shell (1);

a preset gap (310) is formed between the first lever (31) and the shell (1), a first limiting protrusion (11) is arranged on the shell (1), and the reset torsion spring (32) is propped against one end of the first lever (31) and is supported on the first limiting protrusion (11) so as to limit the reset torsion spring (32) to be clamped into the preset gap (310).

2. Auxiliary contact according to claim 1, characterized in that one end of the first limit projection (11) is provided as a bevel (111), and the return torsion spring (32) is fitted onto the supporting surface of the first limit projection (11) along the bevel (111).

3. The auxiliary contact according to claim 1, wherein a positioning column (12) and a clamping block (13) are arranged on the shell (1), the reset torsion spring (32) is sleeved on the positioning column (12), a first clamping protrusion (121) is arranged on the outer circumferential surface of the positioning column (12), the first clamping protrusion (121) is used for limiting the reset torsion spring (32) to be separated from the positioning column (12), a clamping groove (131) is formed in the clamping block (13), and one end, far away from the first lever (31), of the reset torsion spring (32) is clamped and limited in the clamping groove (131).

4. Auxiliary contact according to claim 1, characterized in that the first lever (31) is provided with a second snap projection (311), the second snap projection (311) being adapted to limit the return torsion spring (32) from coming off the first lever (31).

5. Auxiliary contact according to claim 1, characterized in that the operating mechanism (3) further comprises:

the rocker arm (33) and extension spring (34) that resets, rocking arm (33) rotate connect in casing (1), first lever (31) with rocking arm (33) looks butt can promote rocking arm (33) rotate, one end of extension spring (34) that resets connect in casing (1), the other end of extension spring (34) that resets connect in rocking arm (33), rocking arm (33) can overcome the pulling force of extension spring (34) that resets is by first lever (31) promotes and rotates, and can reverse rotation under the pulling force effect of extension spring (34) that resets.

6. The auxiliary contact of claim 5, wherein the auxiliary contact further comprises:

the rocker arm (33) can drive the elastic piece (44) to move so that the elastic piece (44) is selectively electrically connected with the first wiring terminal (41) or the second wiring terminal (42).

7. Auxiliary contact according to any one of claims 1-6, characterized in that the handle portion (2) comprises:

an operation handle (21) rotatably arranged on the shell (1), wherein the operation handle (21) extends out of the shell (1);

a second lever (22) rotatably provided to the housing (1), the second lever (22) being in contact with the first lever (31);

the connecting rod (23), the one end of connecting rod (23) is connected operating handle (21), the other end of connecting rod (23) is connected second lever (22), operating handle (21) rotation can be through connecting rod (23) promotes second lever (22) rotation, so that second lever (22) supports to press first lever (31) rotation.

8. Auxiliary contact according to any one of claims 1-6, characterized in that the housing (1) comprises a base plate (14), the operating mechanism (3) being arranged on the base plate (14), the base plate (14) being provided with a second limit projection (141), the second limit projection (141) being configured to limit the angle of rotation of the first lever (31).

9. Circuit breaker comprising a main body circuit breaker, characterized in that it further comprises an auxiliary contact according to any one of claims 1-8, said auxiliary contact being connected to the outside of said main body circuit breaker, and said first lever (31) being connected to the trip link of said main body circuit breaker, said handle portion (2) being connected to the handle of said main body circuit breaker.

10. The circuit breaker of claim 9, wherein the auxiliary contact is snap-connected to the main body circuit breaker.