CN217655793U - Interlocking device and distribution equipment - Google Patents

Abstract

The utility model discloses an interlock and distribution equipment, include: the power transmission device comprises a moving part and a fixed part, wherein the moving part moves relative to the fixed part to control the on-off of a circuit, the fixed part is provided with a driving assembly and a locking assembly connected with the driving assembly, the moving part is connected with the driving assembly through a connecting structure, and the connecting structure is used for transmitting power generated by the movement of the moving part to the driving assembly so as to realize the locking of a door cover under the power-on condition or the unlocking of the door cover under the power-off condition through driving the locking assembly by the driving assembly; the embodiment of the device controls the door cover and the electric brake by switching on and off the movement control circuit of the moving part and taking the movement of the moving part as a power source of the driving component, thereby respectively realizing two state requirements of safe operation of the switch, simplifying specific structure and operation steps by adopting a design mode of generating a plurality of effects by one action, and being beneficial to reducing manufacturing and using cost.

Description

Interlocking device and distribution equipment

Technical Field

The utility model relates to an interlocking technical field especially relates to an interlocking device. Furthermore, the utility model discloses still relate to a distribution equipment including above-mentioned interlock.

Background

In mining explosion-proof products, it is usually necessary to design a mechanical interlocking device to prevent the danger of opening the switch under the condition of power-on, and the existing mechanical interlocking device has the following defects, one of which is: the power-on process is usually realized by adopting the matching insertion of a moving contact and a fixed contact, but the moving contact and the fixed contact have the requirement of insertion length, while the existing product is realized by driving the moving contact to move relative to the fixed contact through a crank-link mechanism, wherein a transmission mechanism is complex and has high requirements on processing and installation precision; the second method comprises the following steps: the locking and locking of the switch are usually controlled by manually turning the screw rod, so that the labor intensity is high and electric shock accidents are easy to happen; the third is that: the degree of automation is low because the door of the switch is locked and the locking and the device are not connected and disconnected electrically.

SUMMERY OF THE UTILITY MODEL

The utility model provides an interlocking device to solve the technical problem that can open the door under the circular telegram condition.

According to an aspect of the present invention, there is provided an interlock device, including: the movable part is used for moving the movable part, the fixed part is used for controlling the on-off of a circuit, the fixed part is provided with a driving assembly and a locking assembly connected with the driving assembly, the movable part is connected with the driving assembly through a connecting structure, and the connecting structure is used for transmitting power generated by the movement of the movable part to the driving assembly to drive the locking assembly to lock the door cover under the power-on condition or unlock the door cover under the power-off condition.

Further, the driving assembly comprises a first rotating wheel assembly and a power arm arranged on the outer side of the first rotating wheel assembly, and the power arm drives the first rotating wheel assembly to rotate so as to drive the locking assembly to lock or unlock the door cover.

Furthermore, the connecting structure comprises a pushing piece connected to the moving part and a third resetting mechanism arranged on the fixing part, the pushing piece is in abutting fit with the power arm, the moving part drives the pushing piece to move so as to push the power arm to drive the first rotating wheel assembly to rotate against the pre-pressing elastic force of the third resetting mechanism, and the moving part drives the pushing piece to move away from the power arm so that the pre-pressing elastic force applied by the third resetting mechanism forces the power arm to drive the first rotating wheel assembly to rotate and reset.

Further, the third reset mechanism is a reset spring, one end of the reset spring is connected with the fixing part, and the other end of the reset spring is connected with the power arm.

Further, the third reset mechanism is a torsion spring, one end of the torsion spring is connected with the fixing portion, and the other end of the torsion spring is connected with the first rotating wheel assembly.

Furthermore, the connecting structure comprises a telescopic rod, a first end of the telescopic rod is rotatably connected with the moving part, a second end of the telescopic rod is fixedly connected with a free end of the power arm, and the moving part drives the telescopic rod to move so as to drive the rotating wheel on the first rotating wheel component to rotate through the power arm.

Further, the stopper is used for abutting against the power arm to limit the initial position of the power arm.

Furthermore, an elastic piece is sleeved on the outer side of the pushing piece.

Further, still install interlocking device and be used for controlling the electric brake control mechanism that the electric brake divides and shuts on the fixed part, drive assembly's first drive end with shutting subassembly links to each other, drive assembly's second drive end with interlocking device links to each other, interlocking device with electric brake control mechanism links to each other, through the drive assembly motion, with synchronous drive shutting subassembly carries out the locking and the drive to the door closure interlocking device is right electric brake control mechanism unlocks, or synchronous drive shutting subassembly unlocks and drives the door closure interlocking device is right electric brake control mechanism carries out the locking.

According to the utility model discloses an on the other hand still provides distribution equipment, and it includes above-mentioned interlock.

The utility model discloses following beneficial effect has:

1. the door cover and the electric brake are controlled by switching on and off the movement control circuit of the moving part and taking the movement of the moving part as a power source of the driving component, so that two state requirements for safe operation of the switch are respectively realized, and the design mode that one action generates multiple effects simplifies the specific structure and operation steps, and is beneficial to reducing the manufacturing and using cost; when the circuit is required to be conducted in the device, the power generated when the moving part moves is transmitted in a way that the pushing piece pushes the power arm to drive the first rotating wheel assembly to overcome the prepressing elastic force of the third reset mechanism to rotate; when the circuit needs to be disconnected, the pushing piece is only required to be far away from the power arm, and the pre-pressing elastic force applied by the third reset mechanism forces the power arm to drive the first rotating wheel assembly to rotate and reset; compared with the traditional crank connecting rod transmission design, the design of the power transmission structure is simpler in structure, lower in manufacturing precision requirement, lower in difficulty for actual production, and more stable and reliable in operation process of the device due to the simple mechanical structure, and the manufacturing and maintenance cost can be effectively reduced.

2. The two safe use states are as follows: the first use state is that the movement control circuit of the moving part is conducted, and meanwhile, the movement of the moving part drives the driving component to synchronously drive the locking component to lock the door cover and drive the interlocking mechanism to unlock the electric brake control mechanism, so that the danger of the live operation of a user is prevented; the second use state is that the mobile control circuit of the mobile part is disconnected, and at the moment, the synchronous driving locking assembly unlocks the door cover and drives the interlocking mechanism to lock the electric brake control mechanism, so that a user can open the door cover to normally control and maintain the switch; the device realizes the interlocking control of the on-off of the circuit, the locking and unlocking of the door cover and the electric brake control, improves the automation degree of the switch, effectively reduces the dependence on the manual work, and solves the technical problems of high labor intensity and high danger of the manual operation; and the circuit on-off, the door cover locking and unlocking and the electric brake control are interlocked through a mechanical device, so that the working process of the device is stable and reliable, the transmission precision is high, and the device is not easily influenced by the environment.

3. The electric control moving part is arranged at different positions, and the electric control moving part is fixed at the corresponding position, so that the device is switched to different use states, corresponding functions are realized, the automation degree of the device is further improved, the moving displacement precision is higher through electric control, the action is accurate and reliable when the mechanical device performs interlocking control, and the switch can work safely.

4. The locking of door closure and electric brake control mechanism all rotate through the wedge groove on the first runner subassembly and realize, simple structure, easily preparation, low cost.

In addition to the above-described objects, features and advantages, the present invention has other objects, features and advantages. The present invention will be described in further detail with reference to the drawings.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification. In the drawings:

fig. 1 is a schematic structural view of a first embodiment of the preferred embodiment of the present invention;

FIG. 2 isbase:Sub>A schematic cross-sectional view taken along line A-A of FIG. 1;

fig. 3 is a schematic structural view of a second embodiment of the preferred embodiment of the present invention;

fig. 4 is a schematic cross-sectional view taken along line B-B of fig. 3.

The reference numbers illustrate:

1. a moving part; 2. a fixed part;

11. a moving contact; 12. a pusher member;

21. a drive assembly; 22. a locking assembly; 23. an interlock mechanism; 24. a switch control mechanism; 25. static contact; 26. a third reset mechanism; 27. a limiting member;

210. a first wheel assembly; 211. a power arm;

221. a first guide structure; 222. a first locking member; 223. a first reset mechanism;

231. a second guide structure; 232. a second lock;

241. a second rotating wheel assembly; 2401. a card slot; 2101. a wedge-shaped groove.

Detailed Description

The embodiments of the invention will be described in detail below with reference to the drawings, but the invention can be implemented in many different ways, which are defined and covered below.

Referring to fig. 1 and 2, a preferred embodiment of the present invention provides an interlock device, including a moving part 1 and a fixing part 2, the fixing part 2 is connected with a static contact 25, the moving part 1 is connected with an electrical appliance body, the electrical appliance body is connected with a moving contact 11, and the moving contact 11 is driven to approach and conduct the static contact 25 by controlling the movement of the moving part 1 to realize power-on; the moving contact 11 is driven to be away from the static contact 25 on the fixed part 2 to a designated position by controlling the movement of the moving part, so that the power failure is realized. The fixed part 2 is connected with a driving assembly 21, a locking assembly 22, an interlocking mechanism 23 and a switch control mechanism 24 for controlling the opening and closing of a switch, a first driving end of the driving assembly 21 is connected with the locking assembly 22, a second driving end of the driving assembly 21 is connected with the interlocking mechanism 23, the interlocking mechanism 23 is connected with the switch control mechanism 24, when the driving assembly 21 works, the locking assembly 22 is synchronously driven to lock a door cover and the interlocking mechanism 23 is synchronously driven to unlock the switch control mechanism 24 so as to prevent a user from being operated in a live mode, or the locking assembly 24 is synchronously driven to unlock the door cover and the interlocking mechanism 23 is driven to lock the switch control mechanism 24 so that the user can open the switch to perform normal control and maintenance operation; realize circuit break-make, electric brake control and the interlocking between the door closure locking control three through this device, two kinds of states that need when having accomplished the switch and using, one of them is: when the circuit is conducted, the electric brake is controllable, the door cover is locked, and danger caused by live operation of a user is prevented; the second is as follows: when the switch needs to be maintained, the circuit is disconnected, the electric brake is not controllable, and the door cover is unlocked, so that a user can normally open the door cover to operate.

As shown in fig. 1, the driving assembly 21 includes a first rotating wheel assembly 210 and a power arm 211 installed outside the first rotating wheel assembly 210, the moving portion 1 drives a rotating wheel on the first rotating wheel assembly 210 to rotate by pushing the power arm 211, in order to achieve the purpose of controlling the operation of the driving assembly 21 by the movement of the moving portion 1, the moving portion 1 is connected to the driving assembly 21 through a connecting structure, the connecting structure is used for transmitting the power generated when the moving portion moves to the driving assembly 21 to drive the driving assembly 21 to operate, the first rotating wheel assembly 210 includes a rotating shaft rotatably connected to the fixing portion 2, a first rotating wheel fixedly installed outside the rotating shaft, and a wedge groove 2101 installed on an outer side wall of the first rotating wheel, the wedge groove may be an arc groove, a V-shaped groove, etc., and the locking assembly 22 and the interlocking mechanism 23 are both provided with a movable member; when the movable part of the locking assembly 22 is inserted into the wedge-shaped groove 2101, the movable part on the interlocking mechanism 23 is jacked up, the door cover is unlocked, the electric brake control mechanism is locked, the circuit is disconnected, and the door cover can be opened for control, maintenance and other operations; when the movable part on the interlocking mechanism 23 is inserted into the wedge-shaped groove 2101, the movable part on the locking assembly 22 is ejected, at the moment, the electric brake control mechanism is unlocked, the circuit is conducted, the door cover is locked, and the danger of the live operation of a user is prevented.

One embodiment of the connecting structure comprises a pushing part 12 connected to the moving part 1 and a third resetting mechanism 26 arranged on the fixed part, wherein the pre-pressing elastic force of the third resetting mechanism 26 forces the power arm to be in abutting contact with the pushing part 12; when the power distribution device needs to work normally, the moving part 1 drives the moving contact 11 to be inserted into the static contact 25 for a certain distance so as to conduct a circuit, and meanwhile, the moving part 1 drives the pushing piece 12 to move so as to push the power arm 211 to drive the first rotating wheel assembly 210 to overcome the prepressing elastic force of the third resetting mechanism 26 to rotate so as to enable the electric brake control mechanism of the interlocking mechanism 23 to be unlocked and the door cover to be locked, so that the user is prevented from being operated with electricity; when the door cover needs to be opened for control and maintenance operation, the moving control moving contact 11 of the moving part 1 is far away from the static contact 25, so that a circuit is disconnected, meanwhile, the moving part 1 drives the pushing piece 12 to move away from the power arm 211, so that the pre-pressing elastic force applied by the third resetting mechanism 26 forces the power arm 211 to drive the first rotating wheel assembly 210 to rotate and reset, the electric brake control mechanism is locked, and the door cover is unlocked, so that a worker can open the door to work; the connecting structure supports against and pushes the power arm 211 through the pushing piece 12 to transmit power, the pushing piece 12 is far away from the power arm 211 to enable the third reset mechanism 26 to drive the power arm to reset, compared with the traditional crank link mechanism, the connecting structure is simpler in design, lower in manufacturing precision requirement and lower in difficulty for actual production, meanwhile, the design mode can accurately control the displacement, the wedge-shaped groove 2101 is guaranteed to be accurately matched with a moving piece on the locking component 22 or a moving piece on the interlocking mechanism 23 in an inserting mode, and due to the simple structure, the cost is lower in the early installation and later maintenance cost, and the connecting structure is more universal.

Optionally, the third returning mechanism 26 is a return spring, one end of the return spring is connected to the fixing portion 2, the other end of the return spring is connected to the power arm 211, and the third returning mechanism 26 is configured as a return spring so that the third returning mechanism is easy and convenient to operate when being installed.

Optionally, the third reset mechanism 26 is a torsion spring, one end of the torsion spring is connected to the fixing portion 2, the other end of the torsion spring is connected to the rotating shaft of the first rotating wheel assembly 210, and the installation of the torsion spring has the advantages that the installation occupied area is smaller, and the influence on other parts is not easily caused.

Preferably, a limiting member 27 is mounted on the fixing portion 2, and the limiting member 27 is used for abutting against the power arm 211 to limit the initial position of the power arm 211; when the movable member on the locking assembly 22 is inserted into the wedge-shaped slot 2101, the limiting member 27 is abutted against and matched with the power arm 211 at this time, so as to prevent the movable member on the locking assembly 22 from being separated from the wedge-shaped slot 2101 due to the continuous rotation of the power arm 211 under the action of the pre-pressing elastic force of the third resetting mechanism 26.

Preferably, an elastic sleeve may be sleeved on the outer side of the pushing member 12, and the elastic sleeve may be a rubber sleeve, a silicone sleeve, or the like, and the elastic sleeve and the power arm 211 are in contact to have a certain elastic buffering effect when in contact, so as to reduce collision and abrasion generated when the pushing member and the power arm are in contact and pushed.

Preferably, a roller such as a roller or a bearing is rotatably sleeved on the outer side of the pushing member 12, and the roller is in abutting contact with the power arm 211 to reduce the friction force when the pushing member 12 pushes the power arm 211, so as to reduce the scratch generated when the pushing member 12 and the power arm 211 move relatively.

Another embodiment of the connection structure is that the connection structure comprises a telescopic rod, a first end of the telescopic rod is rotatably connected with the moving part 1, a second end of the telescopic rod is fixedly connected with a free end of the power arm 211, when the moving part 1 drives the first end of the telescopic rod to move horizontally, the whole telescopic rod starts to rotate around a rotating axis of the first rotating wheel component, meanwhile, the movable rod extends outwards from a fixed part of the movable rod, and the second end of the telescopic rod drives a rotating wheel on the first rotating wheel component 210 to rotate through the power arm 211 to work. Drive power arm 211 through the telescopic link and rotate with first runner subassembly 210 and need not use reset structure and stop gear, the structure is more simple, is favorable to further simplifying the process of 1 transmission power of removal portion to drive assembly.

The moving part 1 can be the cooperation of handcart and position locking device, namely, the handcart is locked through the position locking device after the moving part is manually pushed to the assigned position, preferably, the moving part 1 is the cooperation of electric moving vehicle and travel switch, the purpose that the moving part 1 is locked after moving to the assigned position can be achieved as well, meanwhile, manual control is not needed, the possibility of electric shock caused by manual operation is avoided, the moving part is electrically controlled to move, so that the displacement precision is accurate, the length of the moving contact inserted into the fixed contact can be controlled conveniently to meet the requirement of working length, and the locking requirement can be achieved by accurately driving the locking component and the interlocking mechanism to reach the assigned locking position.

Preferably, the pushing member 12 may be a push rod or a push plate or the like for pushing the power arm 211.

The locking assembly 22 comprises a first guide structure 221 fixedly connected to the outer side of the fixing part 2, a first locking piece 222 movably arranged on the first guide structure, and a first resetting mechanism 223 arranged between the first guide structure and the first locking piece; when the first locking piece 222 is inserted into the wedge-shaped groove 2101 on the first rotating wheel assembly 210, the first locking piece 222 releases the locking of the door cover, and when the first locking piece 222 is pushed out of the wedge-shaped groove 2101, the first locking piece 222 locks the door cover; when the door cover needs to be locked, the first rotating wheel assembly 210 drives the wedge-shaped groove 2101 to rotate so as to push the first locking piece 222 in the wedge-shaped groove 2101 to overcome the pre-pressing elastic force of the first reset mechanism 223 to move and eject out and lock the door cover; the first rotating wheel assembly 210 drives the wedge-shaped groove 2101 to rotate so that the wedge-shaped groove 2101 is aligned with the first locking piece 222, and the pre-pressure elastic force applied by the first reset mechanism 223 forces the first locking piece 222 to reset and be inserted back into the wedge-shaped groove 2101 again to unlock the door cover.

Preferably, the first locking member 222 may be a pin, a lock rod, or the like, the first guiding structure 221 may be fixed on the fixing portion 2 by a guiding sleeve, a sliding rail, or a guiding groove, or the like, to guide the first locking member 222, and the first resetting structure may be an elastic member such as a resetting spring, an elastic telescopic rod, or the like, so as to drive the first locking member 222 to reset.

Preferably, a side of the first locking member 222 facing the first rotating wheel assembly 210 may be provided with a spherical surface or an arc surface, so that the first rotating wheel assembly 210 can be smoothly inserted into or separated from the wedge groove 2401 through the inclined surface engagement of the wedge groove 2401 when the wedge groove 2401 is driven to rotate.

The electric brake control mechanism 24 comprises a second rotating wheel component 241, the opening and closing of the electric brake can be controlled by rotating a rotating wheel on the second rotating wheel component 241, a clamping groove 2401 is formed in the outer side of the rotating wheel of the second rotating wheel component 241, when a moving part on one end driving interlocking mechanism 23 of the driving component 21 is inserted into the clamping groove 2401, the electric brake control mechanism 24 is locked to enable the electric brake control mechanism not to control the opening and closing of the electric brake, the other end of the driving component 21 drives the first locking part 222 to release the locking of the door cover, and the movable and static contacts are separated into a power-off state at the moment, so that a user can open the door cover to control or maintain.

The interlocking mechanism 23 comprises a second guiding structure 231 arranged between the first rotating wheel assembly 210 and the second rotating wheel assembly 241 and a second locking member 232 movably arranged on the second guiding structure 231, preferably, the second locking member 232 can also adopt a pin shaft, a locking rod and the like, and the second guiding structure can also adopt a guide sleeve, a guide groove, a guide rail and the like, so that the need of separately manufacturing or purchasing parts of the type is avoided, and the corresponding use cost is reduced; the use process of the interlocking mechanism 23 is as follows: when the first rotating wheel assembly 210 rotates to enable the wedge-shaped groove 2101 to push out the first locking piece 222 in the wedge-shaped groove to align with the second locking piece 232, the first locking piece is pushed out to lock the door cover, the second locking piece 232 is separated from the clamping groove 2401 under the action of a return spring and/or gravity and is inserted into the wedge-shaped groove 2101, and at the moment, the electric brake control mechanism 24 can control the opening and closing operations of the electric brake, so that the live operation of a user is prevented; when the first rotating wheel assembly 210 rotates to enable the wedge-shaped groove 2101 to push out the second locking piece 232 in the wedge-shaped groove 2101 upwards through the matching of the wedge-shaped surfaces so as to enable the wedge-shaped groove 2101 to be aligned with the first locking piece 222, the second locking piece 232 is inserted into the clamping groove 2401, the switch control mechanism 24 is locked and cannot control the opening and closing of the switch at the moment, and the prepressing elastic force of the first reset mechanism forces the first locking piece 222 to be inserted into the wedge-shaped groove so as to unlock the door cover; this device can control second locking piece 232 through the runner rotation of first runner subassembly 210 and insert or break away from the draw-in groove, does not need artifical independent control, has improved the automation process, the effectual intensity of labour who reduces the workman, and preferably, first guide structure 221 can adopt structures such as uide bushing, slide rail or guide way, and first locking piece 222 can be for round pin axle, locking lever etc..

The working principle of the device is as follows: this device removes the position of difference through removal portion 1 and can realize different functions with this device automatic switch into different user state, and it is not high to have solved current degree of automation that opens the door soon, and every link needs the independent operation, and the problem of manual operation difficulty, specifically, the first state of this device is: the moving portion 1 moves to a position corresponding to the first state, when the moving portion 1 moves, the first rotating assembly 210 is driven to rotate so as to jack up the second locking member 232 on the interlocking mechanism 23 and insert the second locking member into the clamping groove 2401 on the second rotating assembly 241, at this time, the electric brake control mechanism is in a locking state, meanwhile, when the moving portion 1 moves, the moving contact 11 is driven to be away from the static contact 25 so as to be powered off, and meanwhile, the first locking member 222 on the locking assembly 22 is inserted into the wedge-shaped groove 2101 so that the door cover is in an unlocking state (as shown in fig. 3), and at this time, the door cover can be opened to perform operations such as switching maintenance and the like; the second state of the device is as follows: the moving part 1 moves to a position corresponding to the second state, when the moving part 1 moves, the connecting structure drives the first rotating assembly 210 to drive the wedge-shaped groove to rotate, so that the wedge-shaped groove 2101 is pushed out outwards by matching of the wedge-shaped surface, so that the door cover is locked, meanwhile, when the moving part 1 moves, the moving contact 11 is driven to be inserted into the static contact 25 until the working length is reached, so that the power is supplied, meanwhile, the first rotating assembly 210 rotates until the second locking member 232 is aligned with the wedge-shaped groove 2101, so that the second locking member 232 can be separated from the clamping groove 2401 and inserted into the wedge-shaped groove 2101 to unlock the electric brake control mechanism (as shown in fig. 1), at the moment, the device prevents workers from being operated in a live mode, and avoids danger.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. An interlock device, comprising: a moving part (1) and a fixed part (2), wherein the moving part (1) moves relative to the fixed part (2) to control the on-off of the circuit,

the fixed part (2) is provided with a driving component (21) and a locking component (22) connected with the driving component (21), the movable part (1) is connected with the driving component (21) through a connecting structure,

the connecting structure is used for transmitting power generated by the movement of the moving part (1) to the driving assembly (21) so as to drive the locking assembly (22) through the driving assembly (21) to lock the door cover under the condition of power-on or unlock the door cover under the condition of power-off.

2. An interlock device according to claim 1, wherein said driving assembly (21) comprises a first rotating wheel assembly (210) and a power arm (211) mounted outside said first rotating wheel assembly (210), said first rotating wheel assembly (210) is rotated by said power arm (211) to drive said locking assembly (22) to lock or unlock the door cover.

3. An interlocking device according to claim 2, characterized in that the connecting structure comprises a pushing member (12) connected to the moving part (1) and a third resetting mechanism (26) arranged on the fixed part (2), the pushing member (12) is in abutting engagement with the power arm (211), the moving part (1) drives the pushing member (12) to move so as to push the power arm (211) to drive the first rotating wheel assembly (210) to rotate against the pre-pressing elastic force of the third resetting mechanism (26), the moving part (1) drives the pushing member (12) to move away from the power arm (211) so that the pre-pressing elastic force applied by the third resetting mechanism (26) forces the power arm (211) to drive the first rotating wheel assembly (210) to rotate and reset.

4. An interlocking device according to claim 3, characterized in that said third return means (26) is a return spring, one end of which is connected to said fixed part (2) and the other end of which is connected to said power arm (211).

5. An interlocking device according to claim 3, characterised in that the third return mechanism (26) is a torsion spring, one end of which is connected to the fixed part (2) and the other end of which is connected to the first rotating wheel assembly (210).

6. An interlocking device according to claim 2, characterized in that said connecting structure comprises a telescopic rod, a first end of said telescopic rod is rotatably connected with a moving part, a second end of said telescopic rod is fixedly connected with a free end of said power arm (211), said moving part (1) drives said telescopic rod to move and further drives a rotating wheel on said first rotating wheel assembly (210) to rotate through said power arm (211).

7. An interlocking device according to any one of claims 2-5, characterized in that a stop (27) is connected to the fixed part (2), said stop (27) being adapted to abut against the power arm (211) to define the initial position of the power arm (211).

8. An interlocking device according to any of claims 3-5, characterized in that the pushing member (12) is externally provided with a resilient member.

9. An interlocking device according to any one of claims 3-5, characterized in that an interlocking mechanism (23) and an electric brake control mechanism (24) for controlling the opening and closing of an electric brake are further mounted on the fixing portion (2), the first driving end of the driving component (21) is connected with the locking component (22), the second driving end of the driving component (21) is connected with the interlocking mechanism (23), the interlocking mechanism (23) is connected with the electric brake control mechanism (24), and the driving component (21) is moved to synchronously drive the locking component (22) to lock the door cover and drive the interlocking mechanism (23) to unlock the electric brake control mechanism (24), or synchronously drive the locking component (22) to unlock the door cover and drive the interlocking mechanism (23) to lock the electric brake control mechanism (24).

10. An electrical distribution apparatus comprising an interlock according to any one of claims 1 to 9.

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