Operating mechanism of circuit breaker and circuit breaker

Abstract

The utility model belongs to the technical field of circuit breakers, and discloses an operating mechanism of a circuit breaker and the circuit breaker. The operating mechanism of the circuit breaker comprises a contact support, a lock catch, a jump pin and a tripping rod. Both the lock catch and the jump pin are rotatably arranged on the contact support, the lock catch and the jump pin are in lap joint with each other, a first arm of the tripping rod is connected with the lock catch, a second arm of the tripping rod is connected with one side provided with the overload protection mechanism, and the overload protection mechanism is heated to abut against the second arm so as to drive the tripping rod to rotate, so that the lock catch rotates to be separated from the jump pin, and opening of the circuit breaker is achieved. A special-shaped hole is formed in the lock catch, a limiting part is arranged at the end of the first arm of the tripping rod, the first arm of the tripping rod can penetrate through the special-shaped hole from the front face of the lock catch, and the limiting part can be limited to the back face of the lock catch after penetrating through the special-shaped hole. According to the utility model, reliable connection between the lock catch and the tripping rod is realized, and the condition that the tripping rod falls off from the lock catch in the assembling process or the using process is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of circuit breakers, in particular to an operating mechanism of a circuit breaker and a circuit breaker. Background Art

[0002] When a circuit breaker is produced, the operating mechanism of the circuit breaker needs to be pre-assembled. When the lock and the trip rod in the existing operating mechanism are connected, the end of the trip rod is directly inserted into the corresponding mounting hole on the lock. This structure causes a risk of the trip rod falling from the lock during the production process or use of the circuit breaker, resulting in production problems and reducing the production efficiency and service life of the circuit breaker. Utility Model Content

[0003] The utility model aims to provide an operating mechanism of a circuit breaker and a circuit breaker, which can prevent a lock catch and a tripping rod from being separated during assembly or use of the circuit breaker.

[0004] To achieve this purpose, the utility model adopts the following technical solutions:

[0005] The operating mechanism of the circuit breaker includes a contact support, a lock, a tripping latch and a tripping rod, wherein the lock and the tripping latch are both rotatably arranged on the contact support, the lock is provided with a special-shaped hole, the tripping rod includes a first arm and a second arm, the first arm is provided with a limiting portion, the limiting portion passes through the special-shaped hole from the front side of the lock, and the limiting portion can be limited to the back side of the lock, and the second arm is arranged on one side of the overload protection mechanism.

[0006] As an optional scheme, the special-shaped hole includes a main hole and an extended notch extending outward from the inner wall of the main hole, the limiting portion extends radially along the first arm and protrudes from the outer peripheral wall of the first arm, the limiting portion passes through the extended notch, and after the first arm rotates in the main hole, the limiting portion is limited to the back side of the lock buckle.

[0007] As an optional solution, the limiting portion is arranged at one end of the first arm and is arranged as an integral structure with the first arm.

[0008] As an optional solution, the cross-sectional shape of the main hole is the same as the cross-sectional shape of the extension notch, and the cross-sectional area of ​​the main hole is greater than or equal to the cross-sectional area of ​​the extension notch; or

[0009] The cross-sectional shape of the main hole is different from the cross-sectional shape of the extension notch.

[0010] As an optional solution, the limiting portion is a flat structure at one end of the first arm.

[0011] As an optional solution, two extension notches are provided, and the two extension notches are symmetrically arranged on the inner wall of the main hole, and both sides of the limiting portion extend along the radial direction of the first arm and in opposite directions.

[0012] As an optional solution, the limiting portion is arranged on the outer peripheral wall of the first arm and is arranged as a separate structure from the first arm.

[0013] As an optional solution, a countersunk cavity for accommodating the limiting portion is provided on the back side of the lock buckle.

[0014] As an optional solution, the trip rod also includes a connecting arm, which is connected to the first arm and the second arm, and an abutment portion is provided in a shell outside the operating mechanism of the circuit breaker. The connecting arm can abut against the abutment portion when the second arm is pressed by the overload protection mechanism, and rotate with the abutment portion as a fulcrum.

[0015] A circuit breaker comprises a housing and an operating mechanism of the circuit breaker described in any one of the above schemes, wherein the operating mechanism of the circuit breaker is arranged in the housing.

[0016] Beneficial effects of the utility model:

[0017] The operating mechanism of the circuit breaker provided by the utility model is provided with a special-shaped hole on the lock catch and a limiting part on the first arm of the tripping rod, so that the tripping rod can pass through the special-shaped hole at a certain angle, and the limiting part can be prohibited from escaping from the special-shaped hole after rotation, thereby realizing the connection between the tripping rod and the lock catch, avoiding the tripping rod from falling off the lock catch during assembly or use, and facilitating the automatic assembly of the operating mechanism of the circuit breaker into the circuit breaker. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the operating mechanism of the circuit breaker provided in the first embodiment of the utility model;

[0019] Figure 2 It is a structural schematic diagram of a tripping rod involved in Embodiment 1 of the present utility model;

[0020] Figure 3 It is a structural schematic diagram of a lock involved in Embodiment 1 of the present utility model;

[0021] Figure 4 It is a schematic diagram of the connection between the lock and the trip rod involved in the first embodiment of the utility model;

[0022] Figure 5 It is a structural schematic diagram of a trip rod involved in the second embodiment of the utility model.

[0023] In the figure:

[0024] 1. Contact support;

[0025] 2. Lock buckle; 21. Special-shaped hole; 211. Main hole; 212. Extended notch; 22. Countersunk cavity;

[0026] 3. Tripping rod; 31. First arm; 311. Position limiting portion; 32. Second arm; 33. Connecting arm; 331. First rod; 332. Second rod;

[0027] 4. Bimetallic contact assembly; 41. Bimetallic strip. DETAILED DESCRIPTION

[0028] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar components or components having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0029] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection, it can be a mechanical connection or an electrical connection, it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] In the description of the present utility model, unless otherwise clearly stipulated and limited, a first feature being "above" or "below" a second feature may include the first feature and the second feature being in direct contact, or may include the first feature and the second feature being in contact not directly but through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes the first feature being directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0031] The technical solution of the utility model is further explained below with reference to the accompanying drawings and through specific implementation methods.

[0032] Embodiment 1

[0033] The embodiment of the utility model provides an operating mechanism of a circuit breaker, which can effectively prevent the trip rod 3 from falling off from the lock 2, improve the efficiency of production and assembly, and can reduce the risk of falling off during use, thereby improving safety and stability during use.

[0034] like Figure 1-Figure 4 As shown, the operating mechanism of the circuit breaker includes a contact support 1, a lock 2, a tripping catch and a tripping rod 3. Among them, the lock 2 and the tripping catch can be rotatably arranged on the contact support 1, and the lock 2 and the tripping catch overlap each other, the first arm 31 of the tripping rod 3 is connected to the lock 2, and the second arm 32 of the tripping rod 3 is arranged on one side of the overload protection mechanism. The overload protection mechanism can be selected as a bimetallic contact assembly 4. When an overload occurs in the circuit breaker, the bimetallic strip 41 of the bimetallic contact assembly 4 is heated and bent and presses against the second arm 32 to drive the tripping rod 3 to rotate, so that the lock 2 rotates and separates from the tripping catch, thereby realizing the opening of the circuit breaker.

[0035] Specifically, in order to prevent the tripping rod 3 from falling off the lock buckle 2, a special-shaped hole 21 is provided on the lock buckle 2, and the first arm 31 of the tripping rod 3 is provided with a limiting portion 311. The first arm 31 of the tripping rod 3 can be inserted into the special-shaped hole 21 from the front of the lock buckle 2, and the limiting portion 311 can be limited to the back of the lock buckle 2 after passing through the special-shaped hole 21. In this structure, the limiting portion 311 of the tripping rod 3 can only pass through the special-shaped hole 21 when the limiting portion 311 and the special-shaped hole 21 are aligned. After assembly, the tripping rod 3 only needs to be rotated to achieve the limiting portion 311 being limited to the back of the lock buckle 2.

[0036] The operating mechanism of the circuit breaker is provided with a special-shaped hole 21 on the lock buckle 2 and a limiting portion 311 at the end of the first arm 31 of the tripping rod 3, so that the tripping rod 3 can pass through the special-shaped hole 21 at a certain angle, and the limiting portion 311 can be prohibited from escaping from the special-shaped hole 21 after rotation, thereby realizing the connection between the tripping rod 3 and the lock buckle 2, avoiding the tripping rod 3 from falling off the lock buckle 2 during assembly or use, and facilitating the automatic assembly of the operating mechanism of the circuit breaker into the circuit breaker.

[0037] Alternatively, if Figure 3 As shown, the special-shaped hole 21 includes a main hole 211 and an extension notch 212 extending outward from the inner wall of the main hole 211. The cross-section of the first arm 31 is circular and can be made of a round rod. The limiting portion 311 extends outward along the radial direction of the first arm 31 and protrudes from the outer peripheral wall of the first arm 31. The limiting portion 311 protruding from the outer peripheral wall of the first arm 31 can pass through the extension notch 212, and the first arm 31 is penetrated in the main hole 211. The first arm 31 is rotated so that the limiting portion 311 and the extension notch 212 are staggered, so that the limiting portion 311 protruding from the outer peripheral wall of the first arm 31 can be limited to the back side of the lock buckle 2.

[0038] Optionally, the cross-sectional shape of the main hole 211 and the cross-sectional shape of the extended notch 212 are the same, and can be both circular or square. The same cross-sectional shape of the main hole 211 and the extended notch 212 is conducive to processing and manufacturing, and the processing technology is simple. In addition, the cross-sectional size of the main hole 211 is greater than or equal to the cross-sectional size of the extended notch 212, and the structural design is more reasonable, which is conducive to achieving the limitation of the limiting portion 311 on the back side of the lock buckle 2.

[0039] Optionally, the cross-sectional shape of the main hole 211 and the cross-sectional shape of the extension notch 212 may also be different. This structure can be designed according to the structural shapes of the first arm 31 and the limiting portion 311 to achieve a more precise fit.

[0040] In short, the cross-sectional shape of the main hole 211 and the cross-sectional shape of the extension notch 212 can be the same or different, as long as the limiting portion 311 passes through the extension notch 212 and the first arm 31 rotates in the main hole 211, the limiting portion 311 is limited to the back side of the lock buckle 2.

[0041] Preferably, the main hole 211 is set as a circular hole, the extension notch 212 is set as a square, and the cross-sectional shape of the first arm 31 is circular. In this structure, the main hole 211 and the first arm 311 are the optimal structural design. It can be understood that the main hole 211 and the first arm 31 can be set as a clearance fit. Of course, when the main hole 211 is set as a circular hole, the cross-sectional shape of the first arm 31 may not be set as a circle, for example, it may be set as a square, as long as the diameter of the circumscribed circle of the cross-sectional shape of the first arm 31 is smaller than the diameter of the main hole 211, that is, as long as the first arm 31 can rotate in the main hole 211, the cross-sectional shape of the first arm 31 is not limited here.

[0042] In this embodiment, the limiting portion 311 is arranged at one end of the first arm 31 and is arranged as an integral structure with the first arm 31. The integral structure of the first arm 31 and the limiting portion 311 makes the limiting portion 311 more firmly connected to the first arm 31 and avoids processing more parts.

[0043] Specifically, Figure 2 As shown, the limiting portion 311 can be formed into a flat structure by hammering the end of the first arm 31 , that is, the end of the first arm 31 can be hammered by a stamping mechanism. This structure makes processing convenient and has low cost.

[0044] More specifically, when the end of the first arm 31 is hammered into a flat shape, the limiting portion 311 extends along the radial direction of the first arm 31 and toward opposite sides and protrudes from the outer peripheral wall of the first arm 31. Two extension notches 212 are provided. The two extension notches 212 are symmetrically arranged on the inner wall of the main hole 211 and correspond to the parts of the limiting portion 311 that protrude from the outer peripheral wall of the first arm 31 to both sides along the radial direction of the first arm 31. The structural design is more reasonable and the processing is more convenient.

[0045] Preferably, if Figure 4 As shown, a countersunk cavity 22 is provided on the back of the lock buckle 2, and the bottom of the countersunk cavity 22 is connected to the special-shaped hole 21. When the limiting portion 311 passes through the special-shaped hole 21, it can be accommodated in the countersunk cavity 22, and the structural design is more reasonable.

[0046] Optionally, refer to Figure 2 The tripping rod 3 includes a first arm 31, a second arm 32 and a connecting arm 33 connected between the first arm 31 and the second arm 32, which are formed by bending a round rod in one piece. The round rod is bent in one piece, so that the structural design is simpler and easy to process.

[0047] Specifically, the connecting arm 33 includes a first rod 331 and a second rod 332 which are connected to each other and arranged at an angle. The first arm 31 is arranged at one end of the first rod 331, and the second arm 32 is arranged at one end of the second rod 332. In this structure, the connecting arm 33 is bent according to actual needs to form the first rod 331 and the second rod 332, and the structure is more reasonable.

[0048] The operating mechanism of the circuit breaker is arranged in the shell. Optionally, an abutment portion is arranged in the shell. When the bimetallic strip 41 is bent by heat and presses against the second arm 32, the first rod 331 of the connecting arm 33 abuts against the abutment portion, so that the tripping rod 3 rotates with the abutment portion as a fulcrum and pries the lock buckle 2, so that the lock buckle 2 rotates and is separated from the trip buckle.

[0049] The embodiment of the utility model also provides a circuit breaker, comprising a housing and the operating mechanism of the circuit breaker, wherein the operating mechanism of the circuit breaker is arranged in the housing. The circuit breaker improves the safety and stability of the circuit breaker by arranging the operating mechanism of the circuit breaker, and also improves the assembly efficiency.

[0050] Embodiment 2

[0051] The operating mechanism of a circuit breaker provided in this embodiment has a structure that is substantially the same as that of the first embodiment. For the sake of convenience, only the differences are described.

[0052] Reference Figure 5 As shown, the limiting portion 311 is arranged on the outer peripheral wall of the first arm 31, and is arranged as a split structure with the first arm 31. The split design is adopted in this structure so that the limiting portion 311 is protruded from the outer peripheral wall of the first arm 31. Compared with the limiting portion 311 punched by a stamping mechanism, the limiting portion 311 in this embodiment has higher processing accuracy.

[0053] Specifically, the limiting portion 311 is configured as a rectangular body or a cylindrical body, and is fixed to the outer peripheral wall of the first arm 31 by welding or fasteners (such as screws).

[0054] More specifically, when the inner wall of the main hole 211 is symmetrically provided with two extending notches 212 , the outer peripheral wall of the first arm 31 may be symmetrically provided with two limiting portions 311 corresponding to the two extending notches 212 , respectively.

[0055] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. An operating mechanism of a circuit breaker, comprising a contact support (1), a lock (2), a tripping latch and a tripping rod (3), wherein the lock (2) and the tripping latch are both rotatably arranged on the contact support (1), and characterized in that: The lock buckle (2) is provided with a special-shaped hole (21); the tripping rod (3) comprises a first arm (31) and a second arm (32); the first arm (31) is provided with a limiting portion (311); the limiting portion (311) passes through the special-shaped hole (21) from the front side of the lock buckle (2); and the limiting portion (311) can be limited to the back side of the lock buckle (2); and the second arm (32) is provided on one side of the overload protection mechanism.

2. The operating mechanism of the circuit breaker according to claim 1, characterized in that: The special-shaped hole (21) comprises a main hole (211) and an extending notch (212) extending outward from the inner wall of the main hole (211); the limiting portion (311) extends along the radial direction of the first arm (31) and protrudes from the outer peripheral wall of the first arm (31); the limiting portion (311) passes through the extending notch (212); and after the first arm (31) rotates in the main hole (211), the limiting portion (311) is limited to the back side of the lock buckle (2).

3. The operating mechanism of the circuit breaker according to claim 2, characterized in that: The cross-sectional shape of the main hole (211) is the same as the cross-sectional shape of the extension notch (212), and the cross-sectional area of ​​the main hole (211) is greater than or equal to the cross-sectional area of ​​the extension notch (212); or The cross-sectional shape of the main hole (211) is different from the cross-sectional shape of the extension notch (212).

4. The operating mechanism of the circuit breaker according to claim 2, characterized in that: The limiting portion (311) is arranged at one end of the first arm (31), and is arranged as an integral structure with the first arm (31).

5. The operating mechanism of the circuit breaker according to claim 4, characterized in that: The limiting portion (311) is a flat structure at one end of the first arm (31).

6. The operating mechanism of the circuit breaker according to claim 5, characterized in that: Two extension notches (212) are provided, and the two extension notches (212) are symmetrically arranged on the inner wall of the main hole (211), and the two sides of the limiting portion (311) extend along the radial direction of the first arm (31) and in opposite directions.

7. The operating mechanism of the circuit breaker according to claim 2, characterized in that: The limiting portion (311) is arranged on the outer peripheral wall of the first arm (31), and is arranged as a separate structure with the first arm (31).

8. The operating mechanism of the circuit breaker according to claim 1, characterized in that: The back side of the lock buckle (2) is provided with a countersunk cavity (22) for accommodating the limiting portion (311).

9. The operating mechanism of the circuit breaker according to claim 1, characterized in that: The tripping rod (3) further comprises a connecting arm (33), wherein the connecting arm (33) is connected to the first arm (31) and the second arm (32), and an abutment portion is arranged in a housing outside the operating mechanism of the circuit breaker, and the connecting arm (33) can abut against the abutment portion when the second arm (32) is pressed by the overload protection mechanism, and rotate with the abutment portion as a fulcrum.

10. A circuit breaker, characterized in that It comprises a housing and an operating mechanism of a circuit breaker according to any one of claims 1 to 9, wherein the operating mechanism of the circuit breaker is arranged in the housing.

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