Novel separation structure of propulsion mechanism for draw-out type low-voltage power distribution cabinet

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By designing the separation structure of the swing arm and guide plate in the propulsion mechanism of the low-voltage distribution cabinet, the problem of the worm rack cannot be separated when the circuit breaker is closed, the safe locking and automatic operation of the drawer is realized, and the electric operation is ensured. Reliability and security.

CN222365985UActive Publication Date: 2025-01-17HENAN RUIKE ELECTRIC CO LTD

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Patent Information

Application Number: CN202420687439.5
Authority / Receiving Office: CN · China
Patent Type: Utility models(China)
Current Assignee / Owner
Priority Date: 2023-08-17
Filing Date: 2024-04-07
Publication Date: 2025-01-17
Estimated Expiration: 2034-04-07

AI Technical Summary

Technical Problem

When the existing low-voltage distribution cabinet propulsion mechanism is closed, the worm rack cannot be separated, hindering the electric operation and automatic operation of the drawer, and unable to achieve reliable safety locking.

Method used

A new separation structure was designed. By setting a swing arm and guide plate on the drawer, the worm and rack can be meshed or separated, and the meshing and separation state between the worm and rack is controlled through the closing actuator to ensure that the circuit breaker is engaging. During the gate, the worm and rack are separated to achieve safe locking.

Benefits of technology

The separation of the worm and rack is achieved when the circuit breaker is closed, ensuring safe locking, and returning to the meshing state when the circuit breaker is opened, supporting automatic operation of the drawer, with a simple structure, small space and low cost.

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Abstract

The utility model provides a novel separation structure of a propulsion mechanism for a draw-out type low-voltage power distribution cabinet, which comprises a cabinet body interval, a drawer arranged in the cabinet body interval, a worm arranged on the drawer and a rack arranged in the cabinet body interval and meshed with the worm, the worm rotates to drive the drawer to be pushed in or drawn out, a swing arm is arranged in the drawer, and the swing arm is connected with the drawer. Receding openings are formed in the positions, corresponding to the worm and the rack, of the bottom wall of the drawer, the worm is located in the drawer and rotationally installed in the middle of the swing arm, the worm and the rack are meshed or separated by swinging the swing arm, and the rack is fixedly connected to the bottom face of the cabinet body interval. One end of the swing arm is hinged in the drawer, the worm is rotationally installed in the middle of the swing arm, a receding opening used for receding the worm is formed in the bottom wall of the drawer, the worm penetrates through the receding opening and then is meshed with the rack, the swing arm swings in the direction away from the rack, and therefore the worm is separated from the rack, the structure is simple, the occupied space is small, cost is low, and operation is convenient.

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Description

Technical Field

[0001] The utility model relates to a power distribution cabinet, in particular to a novel separation structure of a propulsion mechanism for a draw-out low-voltage power distribution cabinet. Background Art

[0002] At present, the mainstream of low-voltage distribution cabinets in operation in China is the withdrawable switch cabinet, and the common models are MNS, GCS, GCK, etc. Their common feature is that the distribution unit is a drawer, and the drawer can be pushed and pulled out by the propulsion mechanism to meet the use of different working conditions. In the existing domestic technology, the propulsion mechanism generally adopts a worm rack structure. At present, the propulsion mechanism needs to be manually operated, and the worm is rotated by manpower using special tools. The worm is engaged with the rack fixed on the cabinet to generate relative motion to achieve the entry and exit of the drawer. With the continuous development of power automation, it is an inevitable trend for electric operation to replace manual operation. According to the requirements of electrical safety locking, it is not allowed to operate the isolation break with load, that is, the drawer is not allowed to move in and out when the circuit breaker is closed. The propulsion mechanism with worm rack cannot separate when the circuit breaker is closed. However, the core action of electric operation is to use electric power instead of manpower to rotate the worm. If the worm rack is not separated, reliable safety locking cannot be achieved at the mechanical level. Therefore, the worm gear rack cannot be separated when the circuit breaker is in the closed state, so that the drawer using the propulsion mechanism cannot operate the worm gear through the electric drive device, thereby preventing the drawer from realizing automatic operation. Utility Model Content

[0003] In view of the problems in the prior art, the utility model provides a novel separation structure of a propulsion mechanism for a withdrawable low-voltage power distribution cabinet, the purpose of which is to separate and mesh the worm and the rack through the separation structure.

[0004] A novel separation structure of a propulsion mechanism for a pull-out low-voltage distribution cabinet comprises a cabinet partition, a drawer arranged in the cabinet partition, a worm arranged on the drawer and a rack installed in the cabinet partition, wherein the long direction of the rack and the axial direction of the worm are both arranged parallel to the moving direction of the drawer, the tooth surface of the rack faces the worm, the extension direction of the teeth on the tooth surface is consistent with the tangent direction of the outer circumference of the worm, the rack is meshed with the worm, and the drawer is horizontally moved along the long direction of the rack by rotating the worm, thereby driving the drawer to be advanced or pulled out, a swing arm is arranged in the drawer, and a clearance opening is opened on the bottom wall of the drawer corresponding to the position of the worm and the rack, the worm is located in the drawer and is rotatably installed in the middle part of the swing arm, the worm and the rack are meshed or separated by swinging the swing arm, and the rack is fixedly connected to the bottom surface of the cabinet partition.

[0005] Further, one end of the swing arm is hinged on the bottom wall of the drawer, and guide plates are fixedly connected to the positions on both sides of the swing arm on the bottom wall of the drawer, and the swing arm and the guide plates are in contact and sliding cooperation.

[0006] Further, a pull rod and a closing actuator for opening and closing the circuit breaker are arranged in the drawer, the lower end of the pull rod is hinged to the free end of the swing arm, and the closing actuator is linked to the upper end of the pull rod and drives the pull rod to move up and down.

[0007] Further: a rotating shaft is arranged in the closing actuator, a first connecting rod is connected between the rotating shaft and the pull rod, one end of the first connecting rod is fixedly connected to the rotating shaft, the other end of the first connecting rod is fixedly connected to a pin shaft, a strip slide groove is opened at the upper end of the pull rod, the pin shaft is located in the strip slide groove and slidably cooperates with the strip slide groove.

[0008] Further: a second connecting rod is provided on the rotating shaft, the second connecting rod and the first connecting rod are respectively located on both sides of the rotating shaft, one end of the second connecting rod is fixedly connected to the rotating shaft, and a vertical positioning rod is provided at the other end of the second connecting rod, and the upper end of the positioning rod is hinged on the second connecting rod, and a through hole is provided on the bottom wall of the drawer at a position corresponding to the positioning rod, the diameter of the through hole is larger than the diameter of the positioning rod, the through hole corresponds to the positioning rod up and down, and a positioning block is fixed on the bottom surface of the cabinet partition at a position corresponding to the through hole, and two positioning holes are arranged in parallel on the positioning block, and the two positioning holes correspond to the through hole on the drawer up and down when the drawer is pushed in and pulled out, respectively, and the positioning rod can pass through the through hole and the positioning hole downward in sequence.

[0009] Further, a guide sleeve is fixedly provided on the bottom wall of the drawer, the guide sleeve and the through hole correspond to each other up and down, and the upper end port of the guide sleeve is a trumpet-shaped structure.

[0010] Furthermore, the rotating shaft, the second connecting rod and the positioning rod are all located directly above the swing arm, and a clearance groove is arranged at a position on the swing arm corresponding to the guide sleeve.

[0011] The beneficial effects of the utility model are as follows: one end of the swing arm is hinged in the drawer, the worm is rotatably installed in the middle part of the swing arm, a clearance opening for making way for the worm is provided on the bottom wall of the drawer, the worm meshes with the rack after passing through the clearance opening, and the swing arm swings in the direction away from the rack, thereby separating the worm from the rack, with a simple structure, small space occupation, low cost and easy operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a side view structural schematic diagram of the utility model;

[0013] Figure 2 It is a schematic diagram of the top view structure of the utility model;

[0014] Figure 3 It is a schematic diagram of the structure of the rack in the utility model;

[0015] Figure 4 It is a schematic diagram of the top view structure of the positioning block in the utility model.

[0016] In the figure, 1, closing actuator; 11, first connecting rod; 12, rotating shaft; 13, second connecting rod; 21, pull rod; 211, strip slide groove; 22, positioning rod; 3, swing arm; 31, clearance groove; 4, worm; 5, rack; 51, teeth; 6, bottom surface; 61, positioning block; 611, positioning hole; 7, bottom wall; 71, guide sleeve; 72, clearance opening; 73, through hole; 74, guide plate. DETAILED DESCRIPTION

[0017] The utility model is described in detail below in conjunction with the accompanying drawings. The embodiments of the utility model are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the utility model, and cannot be interpreted as limiting the utility model. The directional terms such as left, middle, right, top, and bottom in the embodiments of the utility model are only relative concepts or are based on the normal use state of the product, and should not be considered as restrictive.

[0018] A new separation structure of the propulsion mechanism for withdrawable low-voltage distribution cabinet, combined with Figure 1 and Figure 2 As shown, it includes a cabinet partition, a drawer arranged in the cabinet partition, a worm 4 arranged on the drawer, and a rack 5 installed in the cabinet partition. The long direction of the rack 5 and the axial direction of the worm 4 are both arranged parallel to the moving direction of the drawer. The tooth surface of the rack 5 faces the worm 4. Figure 3 As shown, the extension direction of the teeth 51 on the tooth surface is consistent with the tangent direction of the outer circumference of the worm 4, so that the rack 5 is meshed with the worm 4. By rotating the worm 4, the drawer can be horizontally moved along the long direction of the rack 5, thereby driving the drawer to be advanced or withdrawn. A swing arm 3 is provided in the drawer, and a clearance opening 72 is opened on the bottom wall 7 of the drawer corresponding to the position of the worm 4 and the rack 5. The worm 4 is located in the drawer and is rotatably installed in the middle part of the swing arm 3. The worm 4 and the rack 5 are meshed or separated by swinging the swing arm 3, and the rack 5 is fixedly connected to the bottom surface 6 of the cabinet partition.

[0019] In order to improve the stability of the swing arm 3, one end of the swing arm 3 is hinged on the bottom wall 7 of the drawer, and guide plates 74 are fixedly connected to the positions on both sides of the swing arm 3 on the bottom wall 7 of the drawer, and the swing arm 3 is in contact with and slidably matched with the guide plates 74. A pull rod 21 and a closing actuator 1 for opening and closing the circuit breaker are arranged in the drawer, and the lower end of the pull rod 21 is hinged on the free end of the swing arm 3. The closing actuator 1 is linked with the upper end of the pull rod 21 and drives the pull rod 21 to move up and down, thereby driving the swing arm 3 to swing. A rotating shaft 12 is arranged in the closing actuator 1, and a first connecting rod 11 is connected between the rotating shaft 12 and the pull rod 21, one end of the first connecting rod 11 is fixedly connected to the rotating shaft 12, and the other end of the first connecting rod 11 is fixedly connected to a pin shaft, and a strip slide groove 211 is provided at the upper end of the pull rod 21, and the pin shaft is located in the strip slide groove 211 and slidably matched with the strip slide groove 211. A second connecting rod 13 is provided on the rotating shaft 12, and the second connecting rod 13 and the first connecting rod 11 are respectively located on both sides of the rotating shaft 12, one end of the second connecting rod 13 is fixedly connected to the rotating shaft 12, and a vertical positioning rod 22 is provided at the other end of the second connecting rod 13, and the upper end of the positioning rod 22 is hinged on the second connecting rod 13, and a through hole 73 is provided on the bottom wall 7 of the drawer at a position corresponding to the positioning rod 22, and the diameter of the through hole 73 is larger than the diameter of the positioning rod 22, and the through hole 73 corresponds to the positioning rod 22 up and down, and a positioning block 61 is fixedly provided at a position corresponding to the through hole 73 on the bottom surface 6 of the cabinet partition, Figure 4 As shown, two positioning holes 611 are arranged in parallel on the positioning block 61. The two positioning holes 611 correspond to the through hole 73 on the drawer when the drawer is pushed in and pulled out, respectively. The positioning rod 22 can pass through the through hole 73 and the positioning hole 611 downward in sequence. The drawer is in the test position after being pulled out, and in the working position after being pushed in. The two positioning holes 611 correspond to the test position and the working position of the drawer, respectively. The positioning rod 22 passes through the through hole 73 and is inserted into the positioning hole 611, which can prevent the drawer from moving in and out when the circuit breaker is closed. In order to facilitate the accurate entry of the top rod into the through hole 73, a guide sleeve 71 is fixed on the bottom wall 7 of the drawer. The guide sleeve 71 and the through hole 73 correspond to each other up and down, and the upper end port of the guide sleeve 71 is a trumpet-shaped structure. The rotating shaft 12, the second connecting rod 13 and the positioning rod 22 are all located directly above the swing arm 3, and a clearance groove 31 is provided on the swing arm 3 at a position corresponding to the guide sleeve 71.

[0020] When the circuit breaker is closed, the rotating shaft 12 rotates clockwise, driving the first connecting rod 11 to move upward. The first connecting rod 11 drives the swing arm 3 to rotate clockwise through the pull rod 21, and the worm 4 installed on the swing arm 3 is lifted upward, so that the worm 4 and the rack 5 change from a meshing state to a separated state, so that when the circuit breaker is closed, the worm 4 cannot work. At the same time, the second connecting rod 13 drives the positioning rod 22 to pass through the through hole 73 and then into the positioning hole 611, so that when the circuit breaker is closed, the drawer is forced to be positioned in the working position or the test position. If the drawer is in other positions, the positioning block 61 can prevent the positioning rod 22 from moving downward, thereby preventing the circuit breaker from being closed. When the circuit breaker is opened, the shaft 12 rotates counterclockwise, driving the first connecting rod 11 to move downward. The first connecting rod 11 drives the swing arm 3 to rotate counterclockwise through the pull rod 21, and the worm 4 installed on the swing arm 3 moves downward, so that the worm 4 and the rack 5 change from a separated state to an engaged state, so that the worm 4 can work normally when the circuit breaker is opened.

[0021] The above shows and describes the basic principles, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principles of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A novel separation structure of a propulsion mechanism for a withdrawable low-voltage distribution cabinet, comprising a cabinet compartment, a drawer arranged in the cabinet compartment, a worm (4) arranged on the drawer, and a rack (5) installed in the cabinet compartment, wherein the long direction of the rack (5) and the axial direction of the worm (4) are both arranged parallel to the moving direction of the drawer, the tooth surface of the rack (5) faces the worm (4), the extension direction of the teeth (51) on the tooth surface is consistent with the tangent direction of the outer circumference of the worm (4), the rack (5) is meshed with the worm (4), and the drawer is horizontally moved along the long direction of the rack (5) by rotating the worm (4), thereby driving the drawer to be advanced or withdrawn, characterized in that: A swing arm (3) is arranged in the drawer, and a clearance opening (72) is opened on the bottom wall (7) of the drawer at positions corresponding to the worm (4) and the rack (5). The worm (4) is located in the drawer and is rotatably mounted on the middle part of the swing arm (3). The worm (4) and the rack (5) are meshed or separated by swinging the swing arm (3). The rack (5) is fixedly connected to the bottom surface (6) of the cabinet partition.

2. According to claim 1, the novel separation structure of the propulsion mechanism for the withdrawable low-voltage distribution cabinet is characterized in that: One end of the swing arm (3) is hinged on the bottom wall (7) of the drawer, and guide plates (74) are fixedly connected to positions on both sides of the swing arm (3) on the bottom wall (7) of the drawer, and the swing arm (3) and the guide plates (74) are in contact and sliding cooperation.

3. The novel separation structure of the propulsion mechanism for a withdrawable low-voltage power distribution cabinet according to claim 2 is characterized in that: A pull rod (21) and a closing actuator (1) for opening and closing a circuit breaker are arranged in the drawer. The lower end of the pull rod (21) is hinged to the free end of the swing arm (3). The closing actuator (1) is linked to the upper end of the pull rod (21) and drives the pull rod (21) to move up and down.

4. The novel separation structure of the propulsion mechanism for a withdrawable low-voltage power distribution cabinet according to claim 3 is characterized in that: A rotating shaft (12) is arranged in the closing actuator (1), a first connecting rod (11) is connected between the rotating shaft (12) and the pull rod (21), one end of the first connecting rod (11) is fixedly connected to the rotating shaft (12), the other end of the first connecting rod (11) is fixedly connected to a pin, a strip slide groove (211) is provided at the upper end of the pull rod (21), the pin shaft is located in the strip slide groove (211) and slidably cooperates with the strip slide groove (211).

5. The novel separation structure of the propulsion mechanism for a withdrawable low-voltage power distribution cabinet according to claim 4 is characterized in that: A second connecting rod (13) is provided on the rotating shaft (12). The second connecting rod (13) and the first connecting rod (11) are respectively located on both sides of the rotating shaft (12). One end of the second connecting rod (13) is fixedly connected to the rotating shaft (12). A vertical positioning rod (22) is provided at the other end of the second connecting rod (13). The upper end of the positioning rod (22) is hinged on the second connecting rod (13). A through hole (73) is provided on the bottom wall (7) of the drawer at a position corresponding to the positioning rod (22). The through hole (73) The diameter of the through hole (73) is larger than the diameter of the positioning rod (22), the through hole (73) corresponds to the positioning rod (22) in upper and lower positions, a positioning block (61) is fixedly provided at a position corresponding to the through hole (73) on the bottom surface (6) of the cabinet partition, two positioning holes (611) are arranged in parallel on the positioning block (61), the two positioning holes (611) correspond to the through hole (73) on the drawer in upper and lower positions when the drawer is pushed in and pulled out, respectively, and the positioning rod (22) can pass through the through hole (73) and the positioning hole (611) in sequence downward.

6. The novel separation structure of the propulsion mechanism for a withdrawable low-voltage power distribution cabinet according to claim 5 is characterized in that: A guide sleeve (71) is fixedly provided on the bottom wall (7) of the drawer. The guide sleeve (71) and the through hole (73) correspond to each other vertically, and the upper end port of the guide sleeve (71) is a trumpet-shaped structure.

7. The novel separation structure of the propulsion mechanism for a withdrawable low-voltage power distribution cabinet according to claim 6 is characterized in that: The rotating shaft (12), the second connecting rod (13) and the positioning rod (22) are all located directly above the swing arm (3), and a clearance groove (31) is provided at a position on the swing arm (3) corresponding to the guide sleeve (71).