Circuit breaker with lock structure

Abstract

The utility model relates to the technical field of circuit breakers, and particularly discloses a circuit breaker with a lock structure. The circuit breaker with the lock structure comprises a shell, an operating mechanism arranged in the shell and a draw bar connected with the operating mechanism, a locking assembly is arranged in the shell and comprises a lock body, a key connected with the lock body in an inserted mode, a rotating piece connected with the lock body and a sliding seat connected with the rotating piece, the rotating piece is used for pushing the sliding seat, and the draw bar is connected with the lock body. The sliding seat is in sliding connection with the shell, and the sliding seat is used for limiting closing rotation of the draw bar. The circuit breaker with the lock structure has an anti-operation effect, can lock the circuit breaker in an opening state, helps to reduce the risk that the circuit breaker is accidentally closed, and practically protects the safety of operators.

Description

Technical Field

[0001] The present application relates to the technical field of circuit breakers, and in particular to a circuit breaker with a locking structure. Background Art

[0002] In electrical and electronic systems and equipment, circuit breakers can not only connect or disconnect normal load currents, but also cut off various faults of loads and lines, such as overcurrent, undervoltage, overheating, and excessive leakage current, thus having multiple protection functions.

[0003] In the related art, a circuit breaker generally includes a housing, components inside the housing, and a gate handle extending out of the housing surface. The operator can open and close the circuit breaker by turning the gate handle up and down. When inspecting the line, the operator needs to open the circuit breaker before conducting the inspection work.

[0004] The above technical solution still has the following defects: the gate handles are mostly open, and the circuit breaker has no protection device when it is opened for maintenance. At this time, the circuit breaker may be misoperated by unrelated personnel, causing the circuit breaker to be accidentally closed, causing operational risks for maintenance personnel. Utility Model Content

[0005] In order to reduce the risk of misoperation of a circuit breaker, the present application provides a circuit breaker with a locking structure.

[0006] The present application provides a circuit breaker with a lock structure, which adopts the following technical solution:

[0007] A circuit breaker with a lock structure comprises a shell, an operating mechanism arranged in the shell and a traction rod connected to the operating mechanism, a locking assembly is arranged in the shell, the locking assembly comprises a lock body, a key inserted into the lock body, a rotating member connected to the lock body and a slide seat connected to the rotating member, the rotating member is used to push the slide seat, the slide seat is slidably connected to the shell, and the slide seat is used to limit the closing rotation of the traction rod.

[0008] By adopting the above technical solution, when the circuit breaker is opened for maintenance, the locking assembly puts the circuit breaker in a locked state, which helps to reduce the risk of accidental closing of the circuit breaker and effectively protects the safety of the operator. After the circuit breaker is opened, the lock body is rotated with the key, and the lock body will drive the rotating part to rotate. The rotating part drives the slide to slide toward the side away from the traction rod, and the slide pulls the traction rod to rotate. At this time, the slide can limit the contact between the traction rod and the operating mechanism, thereby limiting the rotation of the gate handle, so that the circuit breaker cannot be closed. At the same time, no other transmission parts are required between the locking assembly and the traction rod for connection and transmission, which can simplify the transmission structure and help reduce the occupied space.

[0009] After the operator completes the maintenance, he reinserts the key, rotates the lock body, and drives the slide to move to the initial position, so that the traction rod can be unlocked and the closing operation can be completed through the operating mechanism.

[0010] Optionally, the slide seat includes a base and an extension rod connected to the base, the extension rod is arranged on a side of the base close to the traction rod, and one end of the extension rod close to the traction rod is bent to form a bending head, and the bending head is used to pull the traction rod.

[0011] By adopting the above technical solution, when locking the circuit breaker, the extension rod is used to pull the traction rod. On the one hand, the extension rod structure is relatively simple, and the bending head pulls the traction rod by abutting against the traction rod. There is no fixed connection between the slide seat and the traction rod, which makes the production and subsequent assembly of the slide seat relatively simple.

[0012] Secondly, the bending head has a certain curvature. When the extension rod pulls the traction rod, the traction rod does not slide horizontally with the slide seat. In fact, the traction rod moves in a circle along the rotating axis. The bending head can give the traction rod space to rotate while pulling the traction rod.

[0013] Optionally, the rotating member includes a connecting block and an eccentric rod connected to the connecting block on a side away from the lock body, the connecting block is rotatably arranged in the base, the connecting block is connected to the lock body, and the base is provided with a waist-shaped hole for inserting the eccentric rod.

[0014] By adopting the above technical solution, when the rotating part rotates, the eccentric rod performs circular motion with the central axis of the lock body as the axis, and the eccentric rod can push the base to move during the rotation process, and the eccentric rod performs cyclic reciprocating motion in the waist-shaped hole.

[0015] Optionally, the length direction of the waist-shaped hole is perpendicular to the sliding direction of the slide seat.

[0016] By adopting the above technical solution, under the condition that the base can slide, the length of the waist-shaped hole is the shortest among the optional solutions. Therefore, under the same circumstances, the moving path of the eccentric rod can be reduced, thereby effectively reducing the number of key rotations, facilitating operation for operators and improving work efficiency.

[0017] Optionally, a limiting plate is connected to the eccentric rod, and the base is arranged between the limiting plate and the connecting block.

[0018] By adopting the above technical solution, the cooperation between the limiting piece and the connecting block limits the sliding seat, and the sliding seat is not easy to fall off the eccentric rod.

[0019] Optionally, a protective cover is sleeved on the outer side of the lock body, the protective cover is provided with a guide groove for the sliding seat to slide, and the side of the protective cover facing away from the sliding seat is connected to the inner wall of the shell.

[0020] By adopting the above technical solution, the protective cover has the function of protecting the lock body, and the guide groove guides the sliding movement of the slide seat.

[0021] Optionally, the rotating member includes a cam and a boss connected to the cam, the cam is connected to the lock body, the cam is used to push the base, and the waist-shaped hole is for the boss to be inserted.

[0022] By adopting the above technical solution, since the cam is a disc-shaped part with a variable radius, that is, it has a curved profile, the rotation of the cam can be used to drive the slide to slide in the housing according to a predetermined motion law. The cam has a simple structure, high reliability and flexible motion control, and is widely used in mechanical manufacturing, industrial automation and other fields.

[0023] Optionally, the length direction of the waist-shaped hole is consistent with the sliding direction of the sliding seat.

[0024] By adopting the above technical solution, the cooperation between the rotating member and the waist-shaped hole can limit the tendency of the slide to move along the rotation direction of the cam, so that the slide always moves forward and backward along one side direction toward or away from the traction rod, which is convenient for controlling the traction rod and then locking or unlocking the circuit breaker.

[0025] In summary, this application has the following beneficial effects:

[0026] By providing a locking assembly, the circuit breaker in the open state can be locked, which helps to reduce the risk of accidental closing of the circuit breaker and effectively protects the safety of the operator. No other transmission parts are required between the locking assembly and the traction rod for connection and transmission, which can simplify the transmission structure and help reduce the space occupied. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is a schematic structural diagram of a circuit breaker with a locking structure according to Example 1 of the present application;

[0028] Figure 2 is a cross-sectional view of a circuit breaker with a locking structure according to Embodiment 1 of the present application;

[0029] Figure 3 is a schematic structural diagram of a locking assembly according to Embodiment 1 of the present application;

[0030] Figure 4 is an exploded schematic diagram of the locking assembly of Example 1 of the present application;

[0031] Figure 5 is a schematic structural diagram of a rotating member in Example 1 of the present application;

[0032] Figure 6 is a schematic structural diagram of a locking assembly according to Embodiment 2 of the present application;

[0033] Figure 7is a schematic structural diagram of a rotating member in Example 2 of the present application;

[0034] Figure 8 It is an exploded schematic diagram of the locking assembly of Example 2 of the present application.

[0035] Explanation of the reference numerals: 1. Shell; 2. Operating mechanism; 3. Pull rod; 4. Locking assembly; 41. Lock body; 42. Key; 43. Rotating part; 431. Connecting block; 432. Eccentric rod; 433. Limiting plate; 434. Cam; 435. Boss; 44. Sliding seat; 441. Base; 4411. Waist-shaped hole; 442. Extension rod; 4421. Bending head; 45. Protective cover; 451. Guide groove. DETAILED DESCRIPTION

[0036] The following is combined with Figure 1-8 This application is described in further detail.

[0037] In the embodiments of the present application, the terms "upper", "lower", "front", and "back" are used only to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly. Figure 2 The state is based on that, that is, the side of the housing 1 close to the key 42 is the top, the side of the housing 1 away from the key 42 is the bottom, the side of the locking assembly 4 close to the traction rod 3 is the front, and the side of the locking assembly 4 away from the traction rod 3 is the rear.

[0038] Embodiment 1:

[0039] Embodiment 1 of the present application discloses a circuit breaker with a locking structure.

[0040] Reference Figure 1 and Figure 2 The circuit breaker with a locking structure includes a housing 1, in which an operating mechanism 2, a traction rod 3 and a locking assembly 4 are arranged. When an overload current or a short circuit occurs in the circuit, the traction rod 3 is used to cause the transmission of the operating mechanism 2, so that the gate handle is disconnected. When the operator is overhauling, the circuit breaker is in an open state, and the locking assembly 4 is used to limit the traction rod 3, thereby limiting the transmission of the operating mechanism 2, so that the circuit breaker cannot be closed. It should be noted that, except for the locking assembly 4, the remaining components of the circuit breaker are all prior art and will not be described in detail here.

[0041] Reference Figure 2 and Figure 3The locking assembly 4 includes a lock body 41, a key 42, a rotating member 43, a slide seat 44 and a protective cover 45. The protective cover 45 is in an "n" shape as a whole. The lock body 41 is inserted through the protective cover 45. The two side walls of the protective cover 45 are used to protect the lock body 41. The upper side of the protective cover 45 is fixedly connected to the inner wall of the housing 1, and the lower side of the protective cover 45 is slidably connected to the slide seat 44. The key 42 is used to be inserted into the lock body 41, and the key 42 rotates in the lock body 41 to achieve locking and unlocking of the circuit breaker. The rotating member 43 is fixedly connected to one end of the lock body 41 away from the key 42. The rotating member 43 is plugged into the slide seat 44. When the key 42 drives the lock body 41 to rotate, the lock body 41 drives the rotating member 43 to rotate in the slide seat 44.

[0042] Reference Figure 2 and Figure 3 The slide 44 includes a base 441 and an extension rod 442. The base 441 is a box body without a cover. The rotating member 43 is arranged in the base 441. The extension rod 442 is fixedly connected to the side of the base 441 close to the traction rod 3. The length direction of the extension rod 442 is consistent with the sliding direction of the slide 44. The end of the extension rod 442 away from the base 441 is bent to form a bending head 4421. The bending head 4421 is bent downward toward the side close to the traction rod 3, and the bending head 4421 is used to abut against the traction rod 3. When the circuit breaker is locked, the bending head 4421 pulls the traction rod 3 to rotate, thereby limiting the traction rod 3, so that the circuit breaker cannot be closed.

[0043] Reference Figure 3 and Figure 4 The two side walls of the protective cover 45 are provided with guide grooves 451 for the base 441 to slide at one end close to the slide seat 44, and the length direction of the guide grooves 451 is consistent with the sliding direction of the base 441. The rotating member 43 includes a connecting block 431 and an eccentric rod 432. The connecting block 431 is rotatably arranged in the base 441, one end of the connecting block 431 is fixedly connected to the lock body 41, and the other end is fixedly connected to the eccentric rod 432. The eccentric rod 432 is arranged on one side of the connecting block 431 close to the base 441.

[0044] Reference Figure 4 and Figure 5 The central axis of the eccentric rod 432 is parallel to the central axis of the connecting block 431 but does not overlap, that is, the eccentric rod 432 is arranged at the edge of the connecting block 431. The base 441 is provided with a waist-shaped hole 4411 for the eccentric rod 432 to be inserted. The width of the waist-shaped hole 4411 is similar to the diameter of the eccentric rod 432. The length direction of the waist-shaped hole 4411 is consistent with the width direction of the base 441, that is, the length direction of the waist-shaped hole 4411 is perpendicular to the sliding direction of the slide seat 44, which can effectively reduce the number of rotations of the key 42.

[0045] When the eccentric rod 432 rotates, the eccentric rod 432 performs a circular reciprocating motion in the waist-shaped hole 4411 along the length direction of the waist-shaped hole 4411, which can push the base 441 to move, and with the cooperation of the guide groove 451, the sliding seat 44 can slide forward and backward. When the circuit breaker is in an unlocked state, the eccentric rod 432 and the waist-shaped hole 4411 are arranged on a side of the connecting block 431 close to the extension rod 442; when the circuit breaker is in a locked state, the eccentric rod 432 and the waist-shaped hole 4411 are arranged on a side of the connecting block 431 away from the extension rod 442.

[0046] Reference Figure 4 and Figure 5 The circumferential outer wall of the eccentric rod 432 is fixedly connected with a limiting piece 433, the diameter of which is slightly larger than the width of the waist-shaped hole 4411. After the eccentric rod 432 is inserted into the waist-shaped hole 4411, the limiting piece 433 is installed, and the base 441 is arranged between the connecting block 431 and the limiting piece 433, and the limiting piece 433 fits the bottom of the base 441. The limiting piece 433 is used to limit the slide 44, and the slide 44 is not easy to fall off from the eccentric rod 432.

[0047] The implementation principle of the circuit breaker with a lock structure in Example 1 of the present application is as follows: when the operator performs maintenance work, he first opens the circuit breaker to disconnect the circuit, then inserts the key 42 and rotates the lock body 41. The rotation of the lock body 41 drives the connecting block 431 to rotate in the base 441. Under the guidance of the guide groove 451, the eccentric rod 432 further pushes the slide 44 to slide backward. When the slide 44 slides backward, the extension rod 442 pulls the traction rod 3 to rotate until the circuit breaker is in a state where closing cannot be achieved. Finally, the key 42 is pulled out and kept properly.

[0048] After the operator completes the maintenance work, he reinserts and turns the key 42, so that the eccentric rod 432 rotates to the initial position, the slide seat 44 slides forward, and the extension rod 442 releases the limit on the traction rod 3, so that the circuit breaker can be closed.

[0049] Embodiment 2:

[0050] The difference from the first embodiment is that the structures of the sliding seat 44 and the rotating member 43 are different.

[0051] Reference Figure 6 and Figure 7 The rotating member 43 includes a cam 434 and a boss 435. One side of the cam 434 is fixedly connected to the lock body 41, and the other side is fixedly connected to the boss 435. The cam 434 is rotatably arranged in the base 441 around the central axis of the lock body 41. The radial profile size of the cam 434 is different. The side of the cam 434 always abuts against the side wall of the base 441, and the cam 434 pushes the base 441 to slide.

[0052] Reference Figure 7 and Figure 8 The longitudinal section of the boss 435 is in the shape of a "convex" character. The upper end of the boss 435 is inserted into the waist-shaped hole 4411, and the lower end of the boss 435 is arranged at the bottom of the base 441. The cooperation between the cam 434 and the boss 435 limits the slide 44. The upper end diameter of the boss 435 is similar to the width of the waist-shaped hole 4411, and the lower end diameter of the boss 435 is larger than the width of the waist-shaped hole 4411. The length direction of the waist-shaped hole 4411 is consistent with the sliding direction of the slide 44.

[0053] When the cam 434 rotates, it pushes the base 441, so that the base 441 moves in the length direction of the waist-shaped hole 4411. When the circuit breaker is in the unlocked state, the boss 435 is arranged at one end of the waist-shaped hole 4411 close to the extension rod 442; when the circuit breaker is in the locked state, the boss 435 is arranged at one end of the waist-shaped hole 4411 away from the extension rod 442.

[0054] The implementation principle of the circuit breaker with a lock structure in Example 2 of the present application is as follows: when the operator performs maintenance work, he first opens the circuit breaker to disconnect the circuit, then inserts the key 42 and rotates the lock body 41, and the lock body 41 drives the cam 434 to rotate in the base 441. During this process, the boss 435 is relatively displaced in the waist-shaped hole 4411, and the cam 434 pushes the base 441 to move forward, and the extension rod 442 pushes the traction rod 3 to rotate until the circuit breaker is in a state where closing cannot be achieved. Finally, the key 42 is pulled out and properly kept.

[0055] After the operator completes the maintenance work, he reinserts and turns the key 42, so that the cam 434 rotates to the initial position, the extension rod 442 releases the limit on the traction rod 3, and the circuit breaker can be closed.

[0056] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A circuit breaker with a lock structure, comprising a housing (1), an operating mechanism (2) disposed in the housing (1), and a traction rod (3) connected to the operating mechanism (2), characterized in that: A locking assembly (4) is arranged in the housing (1), and the locking assembly (4) comprises a lock body (41), a key (42) plugged into the lock body (41), a rotating member (43) connected to the lock body (41), and a sliding seat (44) connected to the rotating member (43), wherein the rotating member (43) is used to push the sliding seat (44), the sliding seat (44) is slidably connected to the housing (1), and the sliding seat (44) is used to limit the closing rotation of the traction rod (3).

2. The circuit breaker with a locking structure according to claim 1, characterized in that: The sliding seat (44) comprises a base (441) and an extension rod (442) connected to the base (441); the extension rod (442) is arranged on a side of the base (441) close to the traction rod (3); one end of the extension rod (442) close to the traction rod (3) is bent to form a bending head (4421); the bending head (4421) is used to pull the traction rod (3).

3. The circuit breaker with a locking structure according to claim 2, characterized in that: The rotating member (43) comprises a connecting block (431) and an eccentric rod (432) connected to the connecting block (431) on a side facing away from the lock body (41); the connecting block (431) is rotatably arranged in a base (441); the connecting block (431) is connected to the lock body (41); and the base (441) is provided with a waist-shaped hole (4411) for the eccentric rod (432) to be inserted.

4. The circuit breaker with a locking structure according to claim 3, characterized in that: The length direction of the waist-shaped hole (4411) is perpendicular to the sliding direction of the sliding seat (44).

5. The circuit breaker with a locking structure according to claim 3, characterized in that: The eccentric rod (432) is connected to a limiting plate (433), and the base (441) is arranged between the limiting plate (433) and the connecting block (431).

6. The circuit breaker with a locking structure according to claim 1, characterized in that: The lock body (41) is sleeved with a protective cover (45) on its outer side. The protective cover (45) is provided with a guide groove (451) for the sliding seat (44) to slide. The side of the protective cover (45) facing away from the sliding seat (44) is connected to the inner wall of the housing (1).

7. The circuit breaker with a locking structure according to claim 4, characterized in that: The rotating member (43) comprises a cam (434) and a boss (435) connected to the cam (434); the cam (434) is connected to the lock body (41); the cam (434) is used to push the base (441); and the waist-shaped hole (4411) is used for inserting the boss (435).

8. The circuit breaker with a locking structure according to claim 7, characterized in that: The length direction of the waist-shaped hole (4411) is consistent with the sliding direction of the sliding seat (44).

Images