CN209561232U - A mechanical interlocking mechanism for molded case circuit breakers - Google Patents

Abstract

The utility model relates to a kind of breaker of plastic casing mechanical chain mechanisms, including substrate, knob on the outside of driving lever and cabinet door, substrate is fixed on two and needs on chain breaker, substrate, which is equipped with, makes driving lever only along the limiting section moved perpendicular to driving lever length direction, driving lever includes the first driving lever and the second driving lever, first driving lever is equipped with close to one end of circuit breaker handle and the through-hole of circuit breaker handle cooperation, the other end is fixed with the first rack gear, second driving lever is equipped with far from one end of the first driving lever and the through-hole of circuit breaker handle cooperation, the other end is equipped with the second rack gear, knob is equipped with gear close to one end of breaker, the two sides of gear and the first rack gear, the engagement connection of second rack gear.Knob is rotated, the power of rotation is transmitted on the handle of breaker by gear, rack gear and driving lever, so that the state of two breakers is changed, reduce the complexity of grid switching operation, while improving the safety of operation.

Description

A mechanical interlocking mechanism for molded case circuit breakers

technical field

The utility model relates to the technical field of low-voltage power distribution, in particular to a mechanical interlocking mechanism of a molded case circuit breaker.

Background technique

The mechanical interlock mechanism is mostly used in universal circuit breakers to control the linkage opening and closing of circuit breakers in two-way or multi-way power distribution systems. Different from universal circuit breakers, plastic case circuit breakers generally only consider electrical interlocking and not mechanical interlocking when designing, so plastic case circuit breakers themselves do not have mechanical interlocking devices, and the reliability of electrical interlocking is far inferior to mechanical interlocking . For power distribution facilities such as low-voltage distribution boxes and power distribution cabinets using plastic case circuit breakers, when interlock protection is required, in order to avoid causing two circuit breakers to operate in parallel, ensure that operators strictly follow the "Electrical Industry Safety Regulations" To operate in the prescribed order, only the cabinet door or drawer can be opened to perform the switching operation of power-off and power transmission, which increases the complexity and danger of the operation.

Utility model content

The purpose of the utility model is to provide a mechanical interlocking mechanism of a molded case circuit breaker, which can complete the conversion of switching operation outside the cabinet door or drawer, which is easy to operate and improves the safety of operation.

The above-mentioned purpose of the utility model is achieved through the following technical solutions:

A mechanical interlocking mechanism for molded case circuit breakers, including a base plate, a lever and a knob on the outside of the cabinet door. The base plate is fixed on two circuit breakers that need to be interlocked. direction movement, the lever includes a first lever and a second lever, one end of the first lever close to the handle of the circuit breaker is provided with a through hole matching the handle of the circuit breaker, and the other end is fixed with a second A rack, the end of the second driving lever far away from the first driving lever is provided with a through hole matched with the handle of the circuit breaker, the other end is provided with a second rack, and the end of the knob close to the circuit breaker is provided with a gear, so Both sides of the gear are engaged with the first rack and the second rack.

By adopting the above technical solution, the two circuit breakers are located on the same horizontal plane, the circuit breaker on the left is in the opening state, and the circuit breaker in the right is in the closing state. Relatively above. When it is necessary to change the state of two circuit breakers, turn the knob on the cabinet door clockwise, the gear on the knob rotates to drive the rack, the first rack moves upward to drive the first lever, and the first lever passes through the limit part to move upward. Sliding, the handle of the left circuit breaker is located in the through hole of the first lever, and the handle is in contact with the inner wall of the through hole. When the first lever slides upward, the inner wall of the through hole provides a thrust to make the handle of the left circuit breaker rotate upward. , and finally turn to the closed position; at the same time, the gear drives the second rack to move down, the second lever slides down through the limit part, and the handle of the circuit breaker on the right is located in the through hole of the second lever Turn the handle of the circuit breaker on the left downward, and finally turn it to the open position. Complete the closing and opening of the circuit breaker, the operation is simple, without opening the cabinet door or drawer, which improves the safety of the operation.

The utility model is further configured as follows: the limiting part is composed of two sliding rods, the two sliding rods pass through the driving rod and are slidably connected with the driving rod, and the sliding rod is fixedly connected with the base plate.

By adopting the above technical scheme, the two sliding rods limit the rotation of the driving rod, so that the driving rod slides in the direction of closing and opening of the handle of the circuit breaker.

The utility model is further configured as: the two ends of the sliding rod are provided with blocking pieces.

By adopting the above technical solution, when the handle of the circuit breaker has reached the closing or opening position, the blocking piece can prevent the driving rod from continuing to slide, preventing the driving rod from continuing to slide and detaching from the handle.

The utility model is further configured as follows: the first driving rod and the first rack are integrally formed, and the second driving rod and the second rack are integrally formed.

By adopting the above technical solution, the processing of the first driving rod and the second driving rod is convenient and the processing efficiency is improved.

The utility model is further configured as: an anti-slip part is provided on the annular wall of the knob.

By adopting the above technical scheme, the frictional force between the knob and the hand is increased, and the knob is conveniently turned.

The utility model is further configured as: the base plate is fixed on two circuit breakers by screws.

By adopting the above technical solution, the base plate and the two circuit breakers are fixed.

The utility model is further configured as: the shape of the through hole is square.

By adopting the above technical solution, the handle of the circuit breaker is located in the through hole, and when the lever slides, the inner wall of the through hole abuts against the handle, providing a thrust to the handle to make the handle rotate.

The utility model is further configured as: the top surface of the knob is provided with a convex strip.

By adopting the above technical solution, the circuit breaker on one side is in the open state, the convex bar is biased to that side, and the circuit breaker on the other side is in the closed state, which is convenient for the operator to know the status of the circuit breaker.

In summary, the utility model has the following beneficial effects: when the knob is rotated, the rotating power is transmitted to the handle of the circuit breaker through the gear, the rack and the lever, so that the states of the two circuit breakers are changed, and the two plastic casings are realized. The mechanical interlocking of the circuit breakers ensures that the two circuit breakers operate in accordance with the prescribed order, which not only reduces the complexity of switching operations, but also improves the safety of operations.

Description of drawings

Fig. 1 is a schematic diagram of the mechanism of the mechanical interlocking structure.

In the figure: 1, base plate; 11, sliding rod; 12, retainer; 2, driving rod; 21, first driving rod; 22, second driving rod; 23, through hole; 24, first rack; 25, The second rack; 3, the knob; 31, the gear; 32, the anti-slip part; 4, the convex line; 5, the handle.

Detailed ways

In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, a clear and complete description will be made below in conjunction with the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are part of the implementation of the present invention Examples, not all examples. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present utility model.

Referring to FIG. 1 , the utility model discloses a mechanical interlocking mechanism of a molded case circuit breaker, which includes a base plate 1 , a lever 2 and a knob 3 . The two ends of the base plate 1 are connected with two circuit breakers, and the two circuit breakers are located on the same horizontal plane, and the two ends of the base plate 1 are fixed by screws and the circuit breakers. A limiting part is set on the surface of the base plate 1 away from the circuit breaker. The limiting part makes the lever 2 move only along the length direction of the vertical lever 2. The limiting part is composed of two sliding rods 11, and the two sliding rods 11 are fixed on the base plate in parallel. 1, two sliding rods 11 run through the driving rod 2, the sliding rods 11 are parallel to the moving direction of the driving rod 2, and the sliding rods 11 and the driving rod 2 are slidably connected. The two ends of the sliding rod 11 are fixed with stoppers 12. When the handle 5 of the circuit breaker has reached the closing or opening position, the driving rod 2 will abut against the stopper 12 on the corresponding side, and the driving rod 2 cannot continue to slide to avoid Driving lever 2 continues to slide and breaks away from handle 5.

The lever 2 includes a first lever 21 and a second lever 22. The first lever 21 is slidably connected to the two slide bars 11 on the left side. The left end of the first lever 21 is provided with a square through hole 23, and the left side is disconnected. The handle 5 of the device is located in the square through hole 23, the right end of the first driving lever 21 is provided with a first rack 24, the first driving lever 21 and the first rack 24 are integrally formed, the right side of the first rack 24 and the gear 31 Mesh connection. The second driving rod 22 is slidingly connected with the two sliding rods 11 on the right side. The right end of the second driving rod 22 is provided with a square through hole 23. The handle 5 of the circuit breaker on the right side is located in the square through hole 23. The first driving rod 21 The left end of the left end is provided with the second rack 25, and the second driving lever 22 and the second rack 25 are integrally formed, and the left side of the second rack 25 is engaged with the gear 31.

The knob 3 is installed on the outer wall of the cabinet door, and the knob 3 is connected with the cabinet door in rotation. One end of the knob 3 located in the cabinet door is provided with a gear 31 , the left side of the gear 31 is meshed with the first rack 24 , and the right side of the gear 31 is meshed with the second rack 25 . An anti-slip portion 32 is provided on the annular wall of the knob 3 to increase the friction between the knob 3 and the hand, so as to facilitate turning the knob 3 . The top surface of the knob 3 is provided with a convex strip 4, and the convex strip 4 is biased to the left. At this time, when the circuit breaker on the left is in the open state and the circuit breaker on the right is in the closed state, it is convenient for the operator to understand the status of the circuit breaker.

The implementation principle of this embodiment is: two circuit breakers are located on the same horizontal plane, the circuit breaker on the left is in the opening state, the circuit breaker in the right is in the closing state, and the protruding strip 4 is biased to the left. The position is relatively below, and the position of the second driving lever 22 is relatively above. When the state of two circuit breakers needs to be replaced, turn the knob 3 on the cabinet door clockwise, the gear 31 on the knob 3 rotates to drive the rack, the first rack 24 moves upwards to drive the first driving lever 212, the first driving lever 21 slides upward through the two sliding rods 11, the handle 5 of the left circuit breaker is located in the through hole 23 of the first driving rod 21, the handle 5 abuts against the inner wall of the through hole 23, and when the first driving rod 21 slides upward, the The inner wall of the hole 23 provides a thrust to make the handle 5 of the circuit breaker on the left side rotate upwards, and finally to the closed position. The first driving lever 21 abuts against the upper blocking piece 12 and cannot slide upwards. Simultaneously, the second driving lever 22 drives the handle 5 of the circuit breaker on the right side to the opening position by the same principle, and the convex strip 4 is biased to the right side to complete the state transition of the circuit breaker. It avoids the parallel operation of two circuit breakers, and the switching operation is simple without opening the cabinet door or drawer, which improves the safety of the operation.

Claims (8)

1. a kind of breaker of plastic casing mechanical chain mechanism, it is characterised in that: including the rotation on the outside of substrate (1), driving lever (2) and cabinet door Button (3), the substrate (1) are fixed on two and need on chain breaker, and substrate (1), which is equipped with, makes driving lever (2) only along vertical In the mobile limiting section of driving lever (2) length direction, the driving lever (2) includes the first driving lever (21) and the second driving lever (22), described First driving lever (21) is equipped with close to the one end of circuit breaker handle (5) and the through-hole (23) of circuit breaker handle (5) cooperation, and the other end is solid Surely have the first rack gear (24), second driving lever (22) is equipped with far from the one end of the first driving lever (21) and circuit breaker handle (5) match The through-hole (23) of conjunction, the other end are equipped with the second rack gear (25), and the knob (3) is equipped with gear (31) close to one end of breaker, The two sides of the gear (31) and the first rack gear (24), the second rack gear (25) engagement connection.

2. a kind of breaker of plastic casing mechanical chain mechanism according to claim 1, it is characterised in that: the limiting section is by two Slide bar (11) composition, two slide bars (11) are slidably connected through driving lever (2) and with driving lever (2), slide bar (11) and substrate (1) it is fixedly connected.

3. a kind of breaker of plastic casing mechanical chain mechanism according to claim 2, it is characterised in that: the slide bar (11) Both ends are equipped with baffle (12).

4. a kind of breaker of plastic casing mechanical chain mechanism according to claim 2, it is characterised in that: first driving lever (21) it is integrally formed with the first rack gear (24), second driving lever (22) and the second rack gear (25) are integrally formed.

5. a kind of breaker of plastic casing mechanical chain mechanism according to claim 1, it is characterised in that: the knob (3) Annular wall is equipped with anti-slip part (32).

6. a kind of breaker of plastic casing mechanical chain mechanism according to claim 1, it is characterised in that: the substrate (1) is logical Screw is crossed to be fixed on two breakers.

7. a kind of breaker of plastic casing mechanical chain mechanism according to claim 1, it is characterised in that: the through-hole (23) Shape is square.

8. a kind of breaker of plastic casing mechanical chain mechanism according to claim 1, it is characterised in that: the knob (3) Top surface is equipped with raised line (4).