Operating mechanism of miniature circuit breaker

Abstract

The utility model belongs to the field of circuit breakers, and particularly relates to an operating mechanism of a miniature circuit breaker, which comprises a cabinet body, a circuit breaker body is fixedly arranged in the cabinet body, the front end of the circuit breaker body is rotatably connected with a handle, and the left side and the right side of the circuit breaker body are respectively provided with a limiting assembly. The limiting assembly comprises two guide rails fixedly installed at the left end and the right end of the circuit breaker body, and buffer assemblies are arranged on the upper side and the lower side of the front end of the circuit breaker body. According to the utility model, the friction force between the friction block and the guide rail is adjusted by rotating the threaded rod, so that the friction force borne by the handle during rotation is adjusted, the handle is prevented from loosening during long-time use, and the circuit breaker body is more accurate and safer to operate during use; after the handle is rotated, the arc-shaped supporting plate can buffer the handle, the situation that an operator pulls the handle with too large force and consequently collides and is damaged is avoided, and therefore the service life of the handle is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of circuit breaker, specifically a kind of operating mechanism of small circuit breaker. BACKGROUND

[0002] Circuit breaker is a kind of electrical switch device for protecting circuit and electrical equipment, and small circuit breaker is widely used in electrical system in family, commerce and industry and other fields, for protecting lighting, socket and electrical equipment etc., and small circuit breaker needs to be reasonably selected according to the load current, voltage and other parameters of circuit in use, to ensure that it can effectively protect the safe operation of circuit and equipment, and handle is the main operating mechanism of circuit breaker.

[0003] At present, the handle of circuit breaker may be loose between handle and circuit breaker due to wear during long-time use, and loose handle may affect the accuracy and convenience of operation, thereby increasing operation difficulty, in addition, loose handle may cause circuit breaker to be unable to normally open or close, thereby affecting the protection function of circuit, so as to increase the risk of electrical accident;Therefore, aiming at the above problems, a kind of operating mechanism of small circuit breaker is provided. UTILITY MODEL CONTENT

[0004] In order to make up for the deficiency of prior art, avoid the problem of electrical hazard caused by the failure of handle to be normally used, the utility model provides a kind of operating mechanism of small circuit breaker.

[0005] The utility model solves the technical scheme that the technical scheme that the utility model solves its technical problem is: a kind of operating mechanism of small circuit breaker, including cabinet, the inside fixed mounting of cabinet is equipped with circuit breaker body, the front end of circuit breaker body is rotatably connected with handle, the left and right sides of circuit breaker body are all provided with limiting assembly, and the upper and lower sides of the front end of circuit breaker body are all provided with buffer assembly.

[0006] The limiting assembly includes two guide rails fixedly installed at the left and right ends of circuit breaker body, the inside of guide rail is slidably connected with sliding block, the rear end of sliding block is provided with cavity, the inside of cavity is slidably connected with friction block, the upper and lower sides of sliding block inside are screw-threaded with threaded rod, the upper and lower sides of the surface of threaded rod are all screw-threaded with internal thread sleeve, the rear side of internal thread sleeve is fixedly connected with trapezoidal block, the front end of sliding block is fixedly installed with hollow plate, the inside of hollow plate is slidably connected with sliding plate, the top end of sliding plate is provided with limiting slot, and the top wall of hollow plate is rotatably connected with rotating wheel.

[0007] As preferred, the friction block is in adaptive contact with the inner wall of the guide rail near one end of the cavity, and the friction block and the trapezoidal block are provided with bevels in adaptive sliding connection near the ends, and the two trapezoidal blocks push the friction block to move to the outside of the cavity when moving away from each other.

[0008] As preferred, the upper and lower ends of the threaded rod extend to the outside through the upper and lower ends of the sliding block, and the operator can rotate the threaded rod to drive the two internally threaded sleeves to move away from each other, and the internally threaded sleeves are in sliding connection inside the cavity.

[0009] As preferred, the rotating wheel is rotatably connected inside the limiting groove, and the sliding plate is rotatably connected with the handle at one end away from the hollow plate.

[0010] As preferred, the buffer assembly comprises two support blocks fixedly installed on the upper and lower sides of the front end of the circuit breaker body, a buffer spring is fixedly installed at the front end of the support block, a connecting block is fixedly installed at one end of the support block away from the buffer spring, an arc-shaped support plate is fixedly installed at the top end of the connecting block, a pressing plate is rotatably connected to the top of the arc-shaped support plate, a driven plate is arranged at the top of the arc-shaped support plate, a return spring is fixedly installed at one end of the driven plate away from the arc-shaped support plate, connecting plates are fixedly installed at the left and right sides of one end of the arc-shaped support plate, and a pull rope is connected to the middle of the connecting plate away from the arc-shaped support plate.

[0011] As preferred, the support block has two and is fixedly connected with the two ends of the buffer spring, the arc-shaped support plate is in adaptive contact with the handle, and the arc-shaped support plate can support the handle after rotation.

[0012] As preferred, a groove is formed in the top of the arc-shaped support plate and is in adaptive connection with the driven plate, and the return spring is fixedly installed in the groove at one end away from the driven plate, and the arc-shaped support plate moves to the inside of the groove under the reaction force after contacting the handle.

[0013] As preferred, rotating rods are fixedly connected to the left and right ends of the pressing plate, the rotating rods are rotatably connected to the top of the arc-shaped support plate, and the top of the pull rope is wound around the surface of the rotating rod, the driven plate drives the connecting plate to move and pulls the pull rope, the pull rope pulls the rotating rod to drive the pressing plate to rotate, and the pressing plate rotates and abuts against the surface of the handle to limit the handle.

[0014] The utility model discloses the beneficial effect lies in:

[0015] The utility model discloses the friction between the friction block and the guide rail is adjusted by rotating the threaded rod, thereby adjusting the friction force that handle is received when rotating, avoid the situation that handle appears loose in the long -time use process, and then make the circuit breaker body more accurate and safe in operation in use;

[0016] After rotating the handle, the arc-shaped supporting plate can buffer the handle, avoiding the situation that the handle is damaged due to excessive force when the operator pulls the handle, thereby prolonging the service life of the handle. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings described below are only some of the embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0018] Figure 1 It is a schematic view of the three-dimensional structure of the present application;

[0019] Figure 2 It is a schematic view of the circuit breaker body structure of the present application;

[0020] Figure 3 It is a schematic view of the sliding block side view structure of the present application;

[0021] Figure 4 It is a schematic view of the sliding block bottom view structure of the present application;

[0022] Figure 5 It is a schematic view of the structure of the buffer assembly of the present application;

[0023] Figure 6 It is a schematic view of the Figure 5 structure of the present application.

[0024] In the figure: 1, cabinet body; 2, circuit breaker body; 3, handle; 4, limiting assembly; 41, guide rail; 42, sliding block; 43, cavity; 44, friction block; 451, threaded rod; 452, internal thread sleeve; 453, trapezoidal block; 461, hollow plate; 462, sliding plate; 463, limiting groove; 464, rotating wheel; 5, buffer assembly; 51, supporting block; 52, buffer spring; 53, connecting block; 54, arc-shaped supporting plate; 55, pressing plate; 56, driven plate; 57, reset spring; 58, connecting plate; 59, pull rope. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0026] The application will be further described in detail below with reference to the accompanying drawings Figure 1 —6 to make further detailed description of the present application,

[0027] The application discloses an operating mechanism of a miniature circuit breaker. Referring to Figure 1 The application discloses an operating mechanism of a miniature circuit breaker, comprising a cabinet body 1, a circuit breaker body 2 fixedly installed in the cabinet body 1, a handle 3 rotationally connected to the front end of the circuit breaker body 2, limiting assemblies 4 arranged on the left and right sides of the circuit breaker body 2, and buffer assemblies 5 arranged on the upper and lower sides of the front end of the circuit breaker body 2.

[0028] Referring to Figure 2 - Figure 4 The limiting assembly 4 comprises two guide rails 41 fixedly installed at the left and right ends of the circuit breaker body 2, a sliding block 42 slidably connected to the inside of the guide rail 41, a cavity 43 formed in the rear end of the inside of the sliding block 42, a friction block 44 slidably connected to the inside of the cavity 43, threaded rods 451 threadedly connected to the upper and lower sides of the inside of the sliding block 42, internally-threaded sleeves 452 threadedly connected to the upper and lower sides of the surface of the threaded rods 451, the upper and lower ends of the threaded rods 451 extending to the outside through the upper and lower ends of the sliding block 42, respectively, the threaded rods 451 being rotatable to drive the two internally-threaded sleeves 452 to move away from each other, the internally-threaded sleeves 452 being slidably connected to the inside of the cavity 43, trapezoidal blocks 453 fixedly connected to the rear side of the internally-threaded sleeves 452, one end of the friction block 44 close to the outside of the cavity 43 being in contact with the inner wall of the guide rail 41, the friction block 44 and the trapezoidal block 453 being provided with bevels that are slidably connected to each other, the two trapezoidal blocks 453 moving away from each other to push the friction block 44 to move to the outside of the cavity 43, a hollow plate 461 fixedly installed at the front end of the sliding block 42, a sliding plate 462 slidably connected to the inside of the hollow plate 461, a limiting groove 463 formed in the top end of the sliding plate 462, a rotating wheel 464 rotationally connected to the inside of the limiting groove 463, and the end of the sliding plate 462 away from the hollow plate 461 being rotationally connected to the handle 3.

[0029] Referring to Figure 5 - Figure 6The buffer assembly 5 comprises two support blocks 51 fixedly installed on the upper and lower sides of the front end of the circuit breaker body 2, the front end of the support block 51 is fixedly installed with a buffer spring 52, the end of the support block 51 away from the buffer spring 52 is fixedly installed with a connecting block 53, the top end of the connecting block 53 is fixedly installed with an arc-shaped support plate 54, the support block 51 has two and is fixedly connected with the two ends of the buffer spring 52, the arc-shaped support plate 54 is in contact with the handle 3, the arc-shaped support plate 54 can support the handle 3 after rotation, the top of the arc-shaped support plate 54 is rotatably connected with a pressing plate 55, the top of the arc-shaped support plate 54 is provided with a driven plate 56, the end of the driven plate 56 close to the arc-shaped support plate 54 is fixedly installed with a reset spring 57, the top of the arc-shaped support plate 54 is provided with a groove matched with the driven plate 56, the end of the reset spring 57 away from the driven plate 56 is fixedly installed in the inside of the groove, the arc-shaped support plate 54 will move to the inside of the groove under the reaction force after contacting the handle 3, the left and right sides of the end of the driven plate 56 close to the arc-shaped support plate 54 are fixedly installed with a connecting plate 58, the middle part of the connecting plate 58 close to the arc-shaped support plate 54 is connected with a pull rope 59, the left and right ends of the pressing plate 55 are fixedly connected with a rotating rod, the rotating rod is rotatably connected with the top of the arc-shaped support plate 54, the top of the pull rope 59 is wound and connected with the surface of the rotating rod, the driven plate 56 drives the connecting plate 58 to move and then pulls the pull rope 59, at this time, the pull rope 59 pulls the rotating rod to drive the pressing plate 55 to rotate, at this time, the pressing plate 55 rotates and abuts against the surface of the handle 3, so as to limit the handle 3.

[0030] Working principle: in use, the operator can rotate the threaded rod 451, at this time the threaded rod 451 will drive the two internally threaded sleeves 452 connected by threads to move away from each other, at this time the two internally threaded sleeves 452 will drive the trapezoidal blocks 453 to move, at this time the trapezoidal blocks 453 will push the friction blocks 44 through the inclined surface matched with the friction blocks 44, so that the friction blocks 44 are pushed away from the cavity 43, then the cavity 43 will press the inner wall of the guide rail 41, therefore the friction force between the cavity 43 and the guide rail 41 gradually increases, then the external force received by the handle 3 connected with the sliding block 42 through the hollow plate 461 and the sliding plate 462 when rotating also increases, at this time the handle 3 will not be loose when rotating relative to the circuit breaker body 2, at this time when the handle 3 is pushed to rotate, the handle 3 will push the sliding block 42 to slide in the inside of the guide rail 41, at the same time the handle 3 will pull the sliding plate 462 to slide in the inside of the hollow plate 461, at the same time the rotating wheel 464 rotates in the limiting groove 463, the sliding plate 462 extends out of the hollow plate 461 under the friction force between the rotating wheel 464 and the limiting groove 463 without receiving external force, therefore when the handle 3 is no longer adjusted to rotate, at this time the handle 3 will not move relative to the circuit breaker body 2;

[0031] When the operator pushes the handle 3 to rotate the switch of the circuit breaker body 2, the handle 3 will be rotated downward to the limit position, at this time, the handle 3 will gradually contact the arc-shaped supporting plate 54, at this time, the handle 3 pushes the arc-shaped supporting plate 54 to drive the connecting block 53 to compress the buffer spring 52, and the rotation amplitude of the handle 3 is slowed down through the buffering of the buffer spring 52, so that the handle 3 is prevented from being damaged by colliding with the circuit breaker body 2 due to excessive force, in addition, before the arc-shaped supporting plate 54 contacts the handle 3, the driven plate 56 will first contact the handle 3, at this time, the driven plate 56 is pressed by the handle 3 to compress the reset spring 57, so that the driven plate 56 drives the fixedly connected connecting plate 58 to move away from the handle 3, at this time, the connecting plate 58 pulls the pull rope 59 to move away from the handle 3, and then the pull rope 59 pulls the pressing plate 55 to rotate, so that the pressing plate 55 is pulled to be close to the handle 3, and thus the pressing plate 55 abuts against the surface of the handle 3 to limit the handle 3, so that the handle 3 is prevented from being rotated by a small external force after controlling the switch of the circuit breaker body 2, and the circuit breaker body 2 is kept stable in use.

[0032] The basic principle, main features and advantages of the utility model are shown and described above. It should be understood by those skilled in the art that the utility model is not limited by the above-mentioned embodiments, and the above-mentioned embodiments and the description in the specification are only to illustrate the principle of the utility model, and various changes and improvements can be made to the utility model without departing from the spirit and scope of the utility model, and these changes and improvements all fall within the scope of the utility model claimed.

Claims

1. An operating mechanism for a miniature circuit breaker, characterized in that: The invention comprises a cabinet (1), wherein a circuit breaker body (2) is fixedly installed inside the cabinet (1), a handle (3) is rotatably connected to the front end of the circuit breaker body (2), limiting components (4) are provided on both the left and right sides of the circuit breaker body (2), and buffer components (5) are provided on both the upper and lower sides of the front end of the circuit breaker body (2); The limiting assembly (4) comprises two guide rails (41) fixedly mounted on the left and right ends of the circuit breaker body (2); a slider (42) is slidably connected to the interior of the guide rails (41); a cavity (43) is provided at the rear end of the slider (42); a friction block (44) is slidably connected to the interior of the cavity (43); a threaded rod (451) is threadedly connected to the upper and lower sides of the interior of the slider (42); an internal threaded sleeve (452) is threadedly connected to the upper and lower sides of the surface of the threaded rod (451); a trapezoidal block (453) is fixedly connected to the rear side of the internal threaded sleeve (452); a hollow plate (461) is fixedly mounted on the front end of the slider (42); a sliding plate (462) is slidably connected to the interior of the hollow plate (461); a limiting slot (463) is provided at the top end of the sliding plate (462); and a rotating wheel (464) is rotatably connected to the top wall of the hollow plate (461).

2. The operating mechanism of a miniature circuit breaker according to claim 1, characterized in that: One end of the friction block (44) close to the outside of the cavity (43) is in adaptive contact with the inner wall of the guide rail (41), and the adjacent ends of the friction block (44) and the trapezoidal block (453) are provided with bevel edges that are adaptively slidably connected.

3. The operating mechanism of a miniature circuit breaker according to claim 1, characterized in that: The upper and lower ends of the threaded rod (451) respectively penetrate the upper and lower ends of the slider (42) and extend to the outside, and the internal threaded sleeve (452) is slidably connected to the inside of the cavity (43).

4. The operating mechanism of a miniature circuit breaker according to claim 1, characterized in that: The rotating wheel (464) is rotatably connected to the interior of the limiting groove (463), and the end of the sliding plate (462) away from the hollow plate (461) is rotatably connected to the handle (3).

5. The operating mechanism of a miniature circuit breaker according to claim 1, characterized in that: The buffer assembly (5) comprises two support blocks (51) fixedly mounted on the upper and lower sides of the front end of the circuit breaker body (2); a buffer spring (52) is fixedly mounted on the front end of the support block (51); a connecting block (53) is fixedly mounted on the end of the support block (51) away from the buffer spring (52); an arc-shaped support plate (54) is fixedly mounted on the top of the connecting block (53); a pressure plate (55) is rotatably connected to the top of the arc-shaped support plate (54); a driven plate (56) is provided on the top of the arc-shaped support plate (54); a reset spring (57) is fixedly mounted on the end of the driven plate (56) close to the arc-shaped support plate (54); connecting plates (58) are fixedly mounted on the left and right sides of the driven plate (56) close to the end of the arc-shaped support plate (54); a pull rope (59) is connected to the middle of the connecting plate (58) close to the arc-shaped support plate (54).

6. The operating mechanism of a miniature circuit breaker according to claim 5, characterized in that: There are two support blocks (51) which are fixedly connected to the two ends of the buffer spring (52) respectively, and the arc-shaped support plate (54) is in adaptive contact with the handle (3).

7. The operating mechanism of a miniature circuit breaker according to claim 5, characterized in that: A groove adapted to be engaged with the driven plate (56) is formed on the top of the arc-shaped support plate (54), and one end of the return spring (57) away from the driven plate (56) is fixedly installed inside the groove.

8. The operating mechanism of a miniature circuit breaker according to claim 5, characterized in that: The left and right ends of the pressing plate (55) are fixedly connected to a rotating rod, which is rotatably connected to the top of the arc-shaped support plate (54), and the top of the pull rope (59) is wound around and connected to the surface of the rotating rod.

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