A stroke limiting structure for a switch cabinet chassis vehicle

Abstract

The application relates to a stroke limiting structure for a switch cabinet chassis vehicle, belonging to the field of low-voltage complete switch equipment, which comprises a first sliding plate slidably arranged on a chassis vehicle tray, a second sliding plate slidably arranged on the first sliding plate, a push block arranged on a transmission screw rod, and a micro switch arranged on the chassis vehicle tray and capable of being triggered by the first sliding plate; the second sliding plate can limit the movement of the push block in one direction, and the movement of the push block in the other direction can release the limitation of the second sliding plate. The application is used for a low-voltage cabinet chassis vehicle, and through the cooperation of the push block and the sliding plate, the chassis vehicle can only move between the limited separation position and the connection position, the limiting is reliable, and the structure is simple.

Description

Technical Field

[0001] This invention belongs to the field of low-voltage switchgear, and in particular relates to a travel limit structure for switchgear chassis vehicles. Background Technology

[0002] The movable components of the low-voltage switchgear use drawer-type circuit breakers, which consist of a drawer base and a circuit breaker. To enable interchangeability of circuit breakers of different brands in the low-voltage cabinet, the drawer-type circuit breaker is replaced with a chassis vehicle plus the circuit breaker. The chassis vehicle is compatible with different brands of circuit breakers, and the chassis vehicle carries the circuit breaker in and out.

[0003] Due to the different structural forms of medium and low voltage circuit breakers and the varying functional requirements of their chassis, medium-voltage chassis cannot be directly applied to low-voltage frame circuit breakers. Therefore, a new chassis specifically designed for low-voltage frame circuit breakers was developed. To ensure that the low-voltage switchgear circuit breaker can only move between designated disconnect and connection positions when moving within the cabinet via the chassis, a travel limit device is required. This device is simple in structure and reliable in function. Summary of the Invention

[0004] The purpose of this invention is to provide a travel limit device for switchgear, which enables the low-voltage switchgear chassis to move only between the disconnected position and the connected position, and provides position signals when the chassis reaches the disconnected position and the connected position.

[0005] To achieve the above objectives, the present invention provides a travel limiting structure for a switchgear chassis, comprising a first sliding plate slidably disposed on a chassis tray, a second sliding plate slidably disposed on the first sliding plate, a lever disposed on a transmission lead screw, and a micro switch disposed on the chassis tray and triggerable by the first sliding plate; the second sliding plate can limit the movement of the lever in one direction, and the movement of the lever in another direction can release the restriction of the second sliding plate.

[0006] Preferably, the first sliding plate has a first sliding plate waist-shaped hole, the second sliding plate has a second sliding plate waist-shaped hole with its length direction perpendicular to the first sliding plate waist-shaped hole, and the chassis pallet has a guide bushing passing through the first sliding plate waist-shaped hole and the second sliding plate waist-shaped hole.

[0007] Preferably, the first sliding plate is provided with a roller, and the end corner of the second sliding plate is provided with an arc structure that can cooperate with the roller. When the first sliding plate moves, the roller and the arc structure can push the second sliding plate away from the toggle block.

[0008] Preferably, the roller is riveted to the first sliding plate via a roller shaft.

[0009] Preferably, the first sliding plate and the second sliding plate are respectively provided with a first sliding plate U-shaped groove and a second sliding plate U-shaped groove, and the toggle block can abut against the side of the first sliding plate U-shaped groove and the second sliding plate U-shaped groove respectively to push the first sliding plate and the second sliding plate.

[0010] Preferably, the chassis pallet is provided with a first tension spring shaft in the sliding direction of the first sliding plate, and a first tension spring in a stretched state is connected between the first sliding plate and the first tension spring shaft; the chassis pallet is provided with a second tension spring shaft in the sliding direction of the second sliding plate, and a second tension spring in a stretched state is connected between the second sliding plate and the second tension spring shaft.

[0011] Preferably, the length of the first sliding plate U-shaped groove is shorter than the length of the second sliding plate U-shaped groove.

[0012] Preferably, the toggle block first moves the first sliding plate and then triggers the movement of the second sliding plate.

[0013] Preferably, when the toggle block contacts one side of the U-shaped groove of the second sliding plate, the toggle block is limited by the second sliding plate. At this time, the chassis vehicle reaches the separation / connection position, and the first sliding plate triggers the micro switch at the separation / connection position.

[0014] Preferably, the lever is fixedly connected to the transmission lead screw and rotates synchronously with the transmission lead screw.

[0015] In summary, the present invention has the following beneficial technical effects:

[0016] This invention is used for low-voltage switchgear chassis vehicles. Through the cooperation of the toggle block and the sliding plate, the chassis vehicle can only move between the limited separation position and the connection position. The limiting is reliable and the structure is simple. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of a switchgear chassis travel limit device installed on a chassis vehicle according to the present invention;

[0018] Figure 2 This is a schematic diagram of the structure of a travel limit device for switchgear according to the present invention.

[0019] Figure 3 This is a detailed schematic diagram of the first sliding plate and the second sliding plate of the present invention.

[0020] Reference numerals: 1. First sliding plate; 101. Waist-shaped hole of the first sliding plate; 102. U-shaped groove of the first sliding plate; 2. Second sliding plate; 201. Waist-shaped hole of the second sliding plate; 202. U-shaped groove of the second sliding plate; 3. Toggle block; 4. Guide bushing; 5. Roller shaft; 6. Roller; 701. First tension spring; 702. Second tension spring; 801. First tension spring shaft; 802. Second tension spring shaft; 9. Micro switch; 10. Drive screw; 11. Chassis pallet. Detailed Implementation

[0021] The following is in conjunction with the appendix Figure 1 To be continued Figure 3 The present invention will be further described in detail below. An embodiment of the present invention discloses a travel limiting structure for a switchgear chassis vehicle. This travel limiting structure restricts the movement of the transmission lead screw 10, ensuring that the chassis vehicle can only move between the separated position and the connected position.

[0022] The present invention includes a first sliding plate 1 disposed on a chassis pallet 11, a second sliding plate 2 disposed on the first sliding plate 1, and a lever 3 disposed on a transmission screw 10; the first sliding plate 1 and the second sliding plate 2 have the same length direction, and their movement directions relative to the chassis pallet 11 are perpendicular to each other; the lever 3 is fixedly connected to the transmission screw 10 and rotates synchronously with the transmission screw 10.

[0023] like Figure 1 and Figure 2 As shown, the chassis pallet 11 is provided with a guide bushing 4, the first sliding plate 1 has a first sliding plate waist-shaped hole 101, and the second sliding plate 2 has a second sliding plate waist-shaped hole 201. The guide bushing 4 passes through the second sliding plate waist-shaped hole 201 and the first sliding plate waist-shaped hole 101 and is fixedly connected to the chassis pallet 11, so that the first sliding plate 1 and the second sliding plate 2 are set inside the chassis pallet 11.

[0024] The length direction of the second sliding plate waist-shaped hole 201 is the same as the orientation of the transmission screw 10, and the length direction of the first sliding plate waist-shaped hole 101 is perpendicular to the orientation of the transmission screw 10. The first sliding plate 1 slides relative to the chassis pallet 11 in the width direction through the cooperation of the guide bushing 4 and the first sliding plate waist-shaped hole 101. The second sliding plate 2 slides relative to the chassis pallet 11 in the depth direction through the cooperation of the guide bushing 4 and the second sliding plate waist-shaped hole 201.

[0025] The first sliding plate 1 and the second sliding plate 2 are respectively provided with a first sliding plate U-shaped groove 102 and a second sliding plate U-shaped groove 202 at corresponding side positions, wherein the length of the first sliding plate U-shaped groove 102 is shorter than the length of the second sliding plate U-shaped groove 202; the lever 3 on the transmission screw 10 can cooperate with the first sliding plate U-shaped groove 102 and the second sliding plate U-shaped groove 202, so that the lever 3 can first move the first sliding plate 1 and then trigger the second sliding plate 2 to move, thereby increasing the limiting size.

[0026] The first sliding plate 1 has a roller 6 on the side where the U-shaped groove 102 of the first sliding plate is located. The roller 6 is riveted to the first sliding plate 1 through the roller shaft 5 and can move together with the first sliding plate 1. The end corner of the second sliding plate 2 is an arc structure that can cooperate with the roller 6.

[0027] The chassis pallet 11 has a first tension spring shaft 801 fixedly installed along the length of the first sliding plate 1. A first tension spring 701 in a stretched state is connected between the first sliding plate 1 and the first tension spring shaft 801, so that the first sliding plate 1 is subjected to a force toward the first tension spring shaft 801. The chassis pallet 11 has a second tension spring shaft 802 fixedly installed along the width of the second sliding plate 2. A second tension spring 702 in a stretched state is connected between the second sliding plate 2 and the second tension spring shaft 802, so that the second sliding plate 2 is subjected to a force toward the second tension spring shaft 802.

[0028] The first sliding plate 1 is provided with a micro switch 9 on the side where the second tension spring shaft 802 is located. The micro switch 9 is fixedly connected to the chassis pallet 11 and can cooperate with the first sliding plate 1.

[0029] When the chassis is about to reach the separation or connection position, the lever 3, which rotates with the transmission screw 10, approaches the travel limit structure. The lever 3 causes the first sliding plate 1 to slide relative to the chassis pallet 11 in the width direction. When the roller 6 connected to the first sliding plate 1 no longer blocks the second sliding plate 2, the second sliding plate 2 moves relative to the chassis pallet 11 in the depth direction under the force of the second tension spring 702, blocking the lever 3 so that it cannot continue to rotate in the previous direction. However, it can continue to operate by changing the direction of rotation, thus realizing the travel limit function. When the first sliding plate 1 slides to the position, it presses the micro switch 9, providing an electrical signal for the corresponding position.

[0030] The specific implementation principle of this invention is as follows:

[0031] Figure 1 When the chassis is in the separated position, the travel limit structure of the separated position is triggered. The first sliding plate 1 presses the micro switch 9 of the separated position to provide the current position signal.

[0032] If you want to drive the transmission screw 10 to rotate clockwise, the second sliding plate 2 blocks the lever 3, so the transmission screw 10 cannot be operated clockwise. The transmission screw 10 can only be operated to rotate in the other direction, and the lever 3 rotates with the transmission screw 10.

[0033] When the lever 3 rotates, it contacts one side of the first sliding plate U-shaped groove 102 of the first sliding plate 1, causing the first sliding plate 1 to move to the right under the guidance of the guide sleeve 4. The roller 6 riveted to the first sliding plate 1 contacts the arc structure of the second sliding plate 2, pushing the second sliding plate 2 to move away from the lever 3 under the guidance of the guide sleeve 4.

[0034] After the toggle block 3 disengages from the first sliding plate 1, under the action of the tension spring 7 connected to the first sliding plate 1, the roller 6 continues to push the second sliding plate 2 until the straight section of the side of the second sliding plate 2 contacts the roller 6, and the second sliding plate 2 moves away from the toggle block 3. At this time, the first sliding plate 1 no longer presses the micro switch 9, and the position signal is disconnected.

[0035] When the lever 3 rotates again to be close to the travel limit structure, the lever 3 can pass smoothly without colliding with the second sliding plate 2;

[0036] When the transmission screw 10 is continuously operated to rock the chassis vehicle to the close connection position, the lever 3 approaches the travel limit structure of the connection position. The lever 3 rotates to contact one side of the first sliding plate U-shaped groove 102 of the first sliding plate 1, causing the first sliding plate 1 to move to the right. The position of the roller 6 riveted to the first sliding plate 1 in contact with the second sliding plate 2 gradually changes from a straight segment to an arc segment until the roller 6 and the second sliding plate 2 no longer contact each other.

[0037] Without the roller 6 limiting position, the second sliding plate 2 moves towards the push block 3 under the action of the second tension spring 702 connected to it and under the guidance of the guide sleeve 4.

[0038] When the lever 3 rotates to contact the side of the second sliding plate U-shaped groove 202 of the second sliding plate 2, the lever 3 is limited by the second sliding plate 2 and cannot continue to operate in that direction. At this time, the chassis vehicle reaches the connection position, and the first sliding plate 1 also moves to press the connection position micro switch 9 to provide a position signal.

[0039] When the transmission screw 10 is operated in the opposite direction, the movement of the connecting position travel limit device is consistent with the movement of the aforementioned separating position travel limit device.

[0040] The above are all preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of the present invention.

Claims

1. A travel limit structure for a switchgear chassis vehicle, characterized in that: Includes a first sliding plate (1) slidably disposed on the chassis pallet (11), a second sliding plate (2) slidably disposed on the first sliding plate (1), a lever (3) disposed on the transmission screw (10), and a micro switch (9) disposed on the chassis pallet (11) and triggerable by the first sliding plate (1). The first sliding plate (1) and the second sliding plate (2) are respectively provided with a first sliding plate U-shaped groove (102) and a second sliding plate U-shaped groove (202). The push block (3) can abut against the side of the first sliding plate U-shaped groove (102) and the second sliding plate U-shaped groove (202) to push the first sliding plate (1) and the second sliding plate (2). The first sliding plate (1) is provided with a first sliding plate waist-shaped hole (101), the second sliding plate (2) is provided with a second sliding plate waist-shaped hole (201) whose length direction is perpendicular to the first sliding plate waist-shaped hole (101), and the chassis pallet (11) is provided with a guide bushing (4) that passes through the first sliding plate waist-shaped hole (101) and the second sliding plate waist-shaped hole (201). The first sliding plate (1) is provided with a roller (6), and the end corner of the second sliding plate (2) is provided with an arc structure that can cooperate with the roller (6). When the first sliding plate (1) moves, the second sliding plate (2) can be pushed away from the lever (3) by the roller (6) and the arc structure. The chassis pallet (11) is provided with a first tension spring shaft (801) in the sliding direction of the first sliding plate (1), and a first tension spring (701) in a stretched state is connected between the first sliding plate (1) and the first tension spring shaft (801); the chassis pallet (11) is provided with a second tension spring shaft (802) in the sliding direction of the second sliding plate (2), and a second tension spring (702) in a stretched state is connected between the second sliding plate (2) and the second tension spring shaft (802). The length of the first sliding plate U-shaped groove (102) is shorter than the length of the second sliding plate U-shaped groove (202). The toggle block (3) first moves the first sliding plate (1) and then triggers the second sliding plate (2) to move. The second sliding plate (2) can restrict the movement of the lever (3) in one direction, and the movement of the lever (3) in another direction can release the restriction of the second sliding plate (2); When the transmission screw (10) is continuously operated to shake the chassis to the position close to the connection position or the separation position, the lever (3) approaches the travel limit structure of the connection position or the separation position. The lever (3) rotates to contact one side of the first sliding plate U-shaped groove (102) of the first sliding plate (1), causing the first sliding plate (1) to move to the right. The position of the roller (6) riveted to the first sliding plate (1) in contact with the second sliding plate (2) gradually changes from a straight line segment to an arc segment until the roller (6) and the second sliding plate (2) no longer contact each other. Without the roller (6) limiting the movement, the second sliding plate (2) moves in the direction of the second sliding plate U-groove (202) approaching the paddle block (3) under the action of the second tension spring (702) connected to it and under the guidance of the guide bushing (4). When the toggle block (3) rotates to contact the side of the second sliding plate U-shaped groove (202) of the second sliding plate (2), the toggle block (3) is limited by the second sliding plate (2) and cannot continue to operate in that direction. At this time, the chassis vehicle reaches the connection position or separation position, and the first sliding plate (1) also moves to press the micro switch (9) at the connection position or separation position to provide a position signal.

2. The travel limit structure for a switchgear chassis vehicle according to claim 1, characterized in that: The roller (6) is riveted to the first sliding plate (1) via the roller shaft (5).

3. The travel limit structure for switchgear chassis vehicles according to claim 1, characterized in that: The lever (3) is fixedly connected to the transmission screw (10) and rotates synchronously with the transmission screw (10).

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