Residual-current circuit breaker with release easy to replace

Abstract

The utility model relates to the technical field of circuit breakers, and discloses a residual-current circuit breaker with a release easy to replace, which comprises a cover plate, a switch handle is arranged at the front end of the cover plate, a circuit breaker main body is arranged behind the cover plate, a fixing mechanism is arranged on the outer side of the circuit breaker main body, a connecting mechanism is arranged above the fixing mechanism, and the connecting mechanism is arranged above the cover plate. The fixing mechanism comprises a positioning part and a fixing part, the connecting mechanism comprises a moving part and a connecting part, the positioning part comprises positioning frames, the positioning frames are fixedly connected with the outer side surface of the circuit breaker main body, and the two positioning frames are arranged on the left and the right. By pressing the connecting frame, moving the connecting frame downwards, enabling the lower end of the connecting frame to extrude the fixing rod when the connecting frame moves downwards, enabling the fixing rod to move downwards and releasing the connection between the fixing rod and the fixing hole, the tripper can be pulled out from the interior of the circuit breaker main body, effective separation between components is achieved, and convenience is provided for pulling out the tripper.

Description

Technical Field

[0001] This utility model relates to the field of circuit breaker technology, specifically to a residual current circuit breaker with an easily replaceable trip unit. Background Technology

[0002] A circuit breaker is a switching device that can close, carry, and interrupt current under normal circuit conditions, and can close, carry, and interrupt current under abnormal circuit conditions within a specified time. It plays a protective and control role in the power system. When overload, short circuit, or other faults occur in the circuit, the circuit breaker can quickly disconnect the circuit to prevent the fault from spreading and ensure the safe operation of the power system.

[0003] When replacing the trip unit inside a circuit breaker, since the trip unit is often installed in the circuit breaker by a snap-fit ​​mechanism, the first step in removing the trip unit is to remove the cover plate on the surface of the circuit breaker. Once the cover plate is removed, the operator can easily pull out the internal trip unit. However, the current method of fixing the circuit breaker cover plate generally relies on bolt tightening, which makes it time-consuming and laborious for the staff to remove the cover plate.

[0004] Therefore, a residual current circuit breaker with an easily replaceable trip unit is proposed. Utility Model Content

[0005] The purpose of this utility model is to provide a residual current circuit breaker with an easily replaceable trip unit, which solves the technical problem that the cover plate is time-consuming and laborious to remove due to being fastened with bolts, and makes it convenient to remove the cover plate in front of the circuit breaker.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a residual current circuit breaker with an easily replaceable trip unit, comprising a cover plate, a switch handle installed at the front end of the cover plate, a circuit breaker body disposed at the rear of the cover plate, a fixing mechanism disposed on the outer side of the circuit breaker body, and a connecting mechanism disposed above the fixing mechanism;

[0007] The fixing mechanism includes a positioning part and a fixing part;

[0008] The connecting mechanism includes a moving part and a connecting part.

[0009] Preferably, the positioning part includes a positioning frame, which is fixedly connected to the outer side of the circuit breaker body. Two positioning frames are arranged on the left and right sides. A positioning plate is fixedly arranged on the back of the cover plate. The rear end of the positioning plate is located inside the positioning frame and is slidably connected to the inner wall of the positioning frame.

[0010] Preferably, a connecting frame is provided above the positioning plate, a positioning sleeve is fitted at the lower end of the connecting frame, the lower end of the connecting frame is slidably connected to the inner wall of the positioning sleeve, and the bottom surface of the positioning sleeve is fixedly connected to the positioning plate.

[0011] Preferably, the fixing part includes a fixing rod, the lower end of which passes through the positioning plate and is slidably connected to the positioning plate. The top surface of the positioning frame has a fixing hole, the upper end of which is located inside the positioning hole, and the upper end of the fixing rod is an inclined surface.

[0012] Preferably, a limiting ring is fixedly sleeved on the outer side of the fixing rod, the outer side of the limiting ring is slidably connected to the inner wall of the positioning hole, and a connecting spring is sleeved on the lower end of the connecting frame, with both ends of the connecting spring being fixedly connected to the fixing rod and the limiting ring, respectively.

[0013] Preferably, the movable part includes a mounting frame, which is fixedly connected to the circuit breaker body. A movable frame is provided inside the mounting frame, which is slidably connected to the inner wall of the mounting frame. A locking frame is fixedly provided on the bottom surface of the movable frame.

[0014] Preferably, both the movable frame and the locking frame have limit grooves on their sides, and limit rods are provided inside the limit grooves. The limit rods are slidably connected to the inner wall of the limit grooves and are fixedly connected to the inner wall of the mounting frame. A fixed frame is provided below the mounting frame, and the bottom surface of the fixed frame is fixedly connected to the connecting frame. A fixed groove is provided on the side of the fixed frame.

[0015] Preferably, the connecting part includes a connecting rod, and two connecting rods are arranged vertically. The upper and lower connecting rods are respectively fixedly connected to the movable frame and the locking frame. A connecting sleeve is sleeved on the outer side of the connecting rod, and the connecting sleeve is fixedly connected to the inner wall of the mounting frame. A return spring is sleeved on the outer side of the connecting rod, and the two ends of the return spring are respectively fixedly connected to the connecting rod and the connecting sleeve.

[0016] Compared with the prior art, the beneficial effects of this utility model are: this is a residual current circuit breaker with an easily replaceable trip unit.

[0017] 1) By pressing the connecting bracket, the connecting bracket moves downward. When the connecting bracket moves downward, its lower end squeezes the fixing rod, causing the fixing rod to move downward and release the connection between the fixing rod and the fixing hole. This allows the trip unit to be pulled out from inside the circuit breaker body, achieving effective separation between components and facilitating the removal of the trip unit.

[0018] 2) By pressing the moving frame first and then moving the locking frame, the fixed relationship between the mounting frame and the fixed frame is released, avoiding accidental contact with the connecting frame during use, which could cause the position of the connecting frame to change and thus affect the subsequent removal of the trip unit. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural schematic diagram of the present utility model;

[0020] Figure 2 This is a three-dimensional schematic diagram of the fixing mechanism and the connecting mechanism of this utility model;

[0021] Figure 3 This is a partial perspective view of the fixing mechanism of this utility model;

[0022] Figure 4 This is a perspective view of the connecting mechanism of this utility model.

[0023] In the diagram: 1. Cover plate, 2. Switch handle, 3. Circuit breaker body, 4. Fixing mechanism, 41. Positioning frame, 42. Positioning plate, 43. Connecting frame, 44. Positioning sleeve, 45. Fixing rod, 46. Limiting ring, 47. Connecting spring, 5. Connecting mechanism, 51. Mounting frame, 52. Moving frame, 53. Locking frame, 54. Limiting rod, 55. Fixing frame, 56. Connecting rod, 57. Connecting sleeve, 58. Return spring. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Example 1:

[0026] Based on the current issue that removing the cover plate is time-consuming and laborious due to its bolt-fastened design, please refer to [link / reference needed]. Figures 1-4 This utility model provides a technical solution: a residual current circuit breaker with an easily replaceable trip unit, including a cover plate 1, a switch handle 2 installed at the front end of the cover plate 1, a circuit breaker body 3 arranged at the rear of the cover plate 1, a fixing mechanism 4 arranged on the outside of the circuit breaker body 3, and a connecting mechanism 5 arranged above the fixing mechanism 4.

[0027] The fixing mechanism 4 includes a positioning part and a fixing part;

[0028] The connecting mechanism 5 includes a moving part and a connecting part.

[0029] The positioning part includes a positioning frame 41, which is fixedly connected to the outer side of the circuit breaker body 3. Two positioning frames 41 are arranged on the left and right sides. A positioning plate 42 is fixedly arranged on the back of the cover plate 1. The rear end of the positioning plate 42 is located inside the positioning frame 41 and is slidably connected to the inner wall of the positioning frame 41.

[0030] A connecting frame 43 is provided above the positioning plate 42, and a positioning sleeve 44 is fitted on the lower end of the connecting frame 43. The lower end of the connecting frame 43 is slidably connected to the inner wall of the positioning sleeve 44, and the bottom surface of the positioning sleeve 44 is fixedly connected to the positioning plate 42.

[0031] The fixing part includes a fixing rod 45. The lower end of the fixing rod 45 passes through the positioning plate 42 and is slidably connected to the positioning plate 42. The top surface of the positioning frame 41 has a fixing hole. The upper end of the fixing rod 45 is located inside the positioning hole. The upper end of the fixing rod 45 is an inclined surface.

[0032] A limiting ring 46 is fixedly sleeved on the outer side of the fixed rod 45. The outer side of the limiting ring 46 is slidably connected to the inner wall of the positioning hole. A connecting spring 47 is sleeved on the lower end of the connecting frame 43. The two ends of the connecting spring 47 are fixedly connected to the fixed rod 45 and the limiting ring 46 respectively.

[0033] Furthermore, in this embodiment, pressing the connecting frame 43 causes the connecting frame 43 to move downwards. When the connecting frame 43 moves downwards, its lower end presses against the fixing rod 45, causing the fixing rod 45 to move downwards. The upper end of the fixing rod 45 is no longer located in the fixing hole, so the cover plate 1 can be pulled to pull the positioning plate 42 out of the positioning frame 41, thereby exposing the area where the trip unit is installed inside the circuit breaker body 3, so that the trip unit can be pulled out from inside the circuit breaker body 3.

[0034] Furthermore, in this embodiment, by pressing the connecting frame 43, the connecting frame 43 moves downward. When the connecting frame 43 moves downward, its lower end presses against the fixing rod 45, causing the fixing rod 45 to move downward and release the connection between the fixing rod 45 and the fixing hole. This allows the trip unit to be pulled out from inside the circuit breaker body 3, achieving effective separation between components and facilitating the removal of the trip unit.

[0035] Example 2:

[0036] Please see Figures 1-4 Furthermore, based on Embodiment 1, the following is obtained: the movable part includes a mounting frame 51, which is fixedly connected to the circuit breaker body 3. A movable frame 52 is provided inside the mounting frame 51, which is slidably connected to the inner wall of the mounting frame 51. A locking frame 53 is fixedly provided on the bottom surface of the movable frame 52.

[0037] Both the movable frame 52 and the locking frame 53 have limit grooves on their sides. A limit rod 54 is installed inside the limit groove. The limit rod 54 is slidably connected to the inner wall of the limit groove. The limit rod 54 is fixedly connected to the inner wall of the mounting frame 51. A fixed frame 55 is installed below the mounting frame 51. The bottom surface of the fixed frame 55 is fixedly connected to the connecting frame 43. A fixing groove is opened on the side of the fixed frame 55.

[0038] The connecting part includes a connecting rod 56, and two connecting rods 56 are arranged at the top and bottom. The two connecting rods 56 are fixedly connected to the movable frame 52 and the locking frame 53 respectively. A connecting sleeve 57 is sleeved on the outer side of the connecting rod 56. The connecting sleeve 57 is fixedly connected to the inner wall of the mounting frame 51. A return spring 58 is sleeved on the outside of the connecting rod 56. The two ends of the return spring 58 are fixedly connected to the connecting rod 56 and the connecting sleeve 57 respectively.

[0039] Furthermore, in this embodiment, when disassembling the trip unit inside the circuit breaker body 3, the movable frame 52 is pressed first to move the movable frame 52 forward. The movable frame 52 drives the locking frame 53 to move forward synchronously. The rear end of the locking frame 53 leaves the fixing groove, thereby making the mounting frame 51 and the fixing frame 55 no longer fixed, so that the connecting frame 43 can move downward.

[0040] Furthermore, in this embodiment, by first pressing the movable frame 52 and then moving the locking frame 53, the fixed relationship between the mounting frame 51 and the fixed frame 55 is released, thus avoiding accidental contact with the connecting frame 43 during use, which would cause the position of the connecting frame 43 to change and thus affect the subsequent removal of the trip unit.

[0041] When disassembling the trip unit inside the circuit breaker body 3, first press the movable frame 52 to move it forward. The movable frame 52 drives the locking frame 53 to move forward simultaneously. The rear end of the locking frame 53 leaves the fixing groove, thereby making the mounting frame 51 and the fixing frame 55 no longer fixed, allowing the connecting frame 43 to move downward. Then press the connecting frame 43, and the connecting frame 43 moves downward. When the connecting frame 43 moves downward, its lower end presses against the fixing rod 45, causing the fixing rod 45 to move downward. The upper end of the fixing rod 45 is no longer located in the fixing hole, so the cover plate 1 can be pulled to pull the positioning plate 42 out of the positioning frame 41, thereby exposing the area where the trip unit is installed inside the circuit breaker body 3, and the trip unit can then be pulled out from inside the circuit breaker body 3.

[0042] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A residual current circuit breaker with an easily replaceable trip unit, comprising a cover plate (1), characterized in that: A switch handle (2) is installed at the front end of the cover plate (1), a circuit breaker body (3) is provided behind the cover plate (1), a fixing mechanism (4) is provided on the outside of the circuit breaker body (3), and a connecting mechanism (5) is provided above the fixing mechanism (4). The fixing mechanism (4) includes a positioning part and a fixing part; The connecting mechanism (5) includes a moving part and a connecting part.

2. A residual current circuit breaker with an easily replaceable trip unit according to claim 1, characterized in that: The positioning part includes a positioning frame (41), which is fixedly connected to the outer side of the circuit breaker body (3). There are two positioning frames (41) on the left and right sides. A positioning plate (42) is fixedly installed on the back of the cover plate (1). The rear end of the positioning plate (42) is located inside the positioning frame (41) and is slidably connected to the inner wall of the positioning frame (41).

3. A residual current circuit breaker with an easily replaceable trip unit according to claim 2, characterized in that: A connecting frame (43) is provided above the positioning plate (42), and a positioning sleeve (44) is fitted on the lower end of the connecting frame (43). The lower end of the connecting frame (43) is slidably connected to the inner wall of the positioning sleeve (44), and the bottom surface of the positioning sleeve (44) is fixedly connected to the positioning plate (42).

4. A residual current circuit breaker with an easily replaceable trip unit according to claim 3, characterized in that: The fixing part includes a fixing rod (45), the lower end of the fixing rod (45) passes through the positioning plate (42) and is slidably connected to the positioning plate (42), the top surface of the positioning frame (41) is provided with a fixing hole, the upper end of the fixing rod (45) is located inside the positioning hole, and the upper end of the fixing rod (45) is an inclined surface.

5. A residual current circuit breaker with an easily replaceable trip unit according to claim 4, characterized in that: A limiting ring (46) is fixedly sleeved on the outer side of the fixed rod (45). The outer side of the limiting ring (46) is slidably connected to the inner wall of the positioning hole. A connecting spring (47) is sleeved on the lower end of the connecting frame (43). The two ends of the connecting spring (47) are fixedly connected to the fixed rod (45) and the limiting ring (46) respectively.

6. A residual current circuit breaker with an easily replaceable trip unit according to claim 1, characterized in that: The movable part includes a mounting frame (51), which is fixedly connected to the circuit breaker body (3). A movable frame (52) is provided inside the mounting frame (51). The movable frame (52) is slidably connected to the inner wall of the mounting frame (51). A locking frame (53) is fixedly provided on the bottom surface of the movable frame (52).

7. A residual current circuit breaker with an easily replaceable trip unit according to claim 6, characterized in that: The movable frame (52) and the locking frame (53) both have limit grooves on their sides. A limit rod (54) is provided inside the limit groove. The limit rod (54) is slidably connected to the inner wall of the limit groove. The limit rod (54) is fixedly connected to the inner wall of the mounting frame (51). A fixed frame (55) is provided below the mounting frame (51). The bottom surface of the fixed frame (55) is fixedly connected to the connecting frame (43). A fixed groove is provided on the side of the fixed frame (55).

8. A residual current circuit breaker with an easily replaceable trip unit according to claim 7, characterized in that: The connecting part includes a connecting rod (56), and two connecting rods (56) are arranged vertically. The two connecting rods (56) are fixedly connected to the moving frame (52) and the locking frame (53) respectively. A connecting sleeve (57) is sleeved on the outer side of the connecting rod (56). The connecting sleeve (57) is fixedly connected to the inner wall of the mounting frame (51). A return spring (58) is sleeved on the outside of the connecting rod (56). The two ends of the return spring (58) are fixedly connected to the connecting rod (56) and the connecting sleeve (57) respectively.

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