Low-voltage drawer unit opening and closing mechanical interlocking assembly

Abstract

The utility model relates to low -voltage switchgear technology field discloses a kind of low-voltage drawer unit opening and closing mechanical interlocking components, including cabinet, the inside installation of cabinet has drawer body, the outside fixed connection of drawer body has slide rail, drawer interlocking component is provided on drawer body, fixed connection has pin sleeve on slide rail, the outside fixed connection of pin sleeve has U type ring, fixed connection has slide bar on U type ring, spring one is installed in pin sleeve, pin head is slidably connected in pin sleeve, the end of slide bar away from U type ring is installed with spring two, button is installed on spring two. In the utility model, accurate positioning is realized by the elastic pin structure of spring one and pin head, pin sleeve, avoid displacement, limit the drawer body by closing cam sliding into slot, simple structure, convenient operation, can effectively improve work efficiency while ensuring safety.

Description

Technical Field

[0001] This utility model relates to the field of low-voltage switchgear technology, and in particular to a mechanical interlocking component for opening and closing low-voltage drawer units. Background Technology

[0002] The low-voltage drawer unit is a modular component that can be pulled out in a low-voltage switchgear. It integrates components such as circuit breakers and can realize circuit on / off control and convenient maintenance. The low-voltage drawer unit's mechanical interlocking assembly for opening and closing is a safety device that forcibly restricts the circuit breaker's opening and closing status and the drawer's movement permission through physical structure to prevent operation under load.

[0003] The mechanical interlocking assembly for opening and closing low-voltage drawer units is a key mechanical device to ensure the compliance of the operating sequence of low-voltage drawer-type switchgear. It aims to avoid electrical risks caused by chaotic operating logic through structural design. The basic structure includes a bracket, handle extension, rotating part, movable part, and elastic part. The working principle is to utilize the linkage relationship between the components. When the circuit breaker is in the closed state, the rotating part pushes the movable part to the blocking position through a specific contour, restricting the movement of the drawer. When the circuit breaker is opened, the elastic part drives the movable part back to the non-blocking position, allowing the drawer to be inserted or pulled out, thereby achieving a strict interlock between the circuit breaker state and the drawer movement.

[0004] Existing components of this type have many shortcomings in practical applications. Regarding drawer positioning, the positioning structure of existing components is mostly based on slot positioning, which makes it difficult to reliably lock the working position, test position, and disengagement position. Positional deviation or shaking often occurs, resulting in unstable drawer operation, affecting normal equipment operation and posing potential safety risks. Regarding the implementation of operation restrictions, existing components use flexible constraints when the circuit breaker is closed, which is insufficient in restricting the drawer's movement. Unexpected drawer movement is likely to occur, and dangerous operations cannot be reliably prevented, making it difficult to fully guarantee the safety of equipment and personnel. At the same time, the linkage control between drawer position and switch operation is not direct enough, and the operation process for restricting the opening and closing of the circuit breaker is cumbersome. The complex mechanical structure makes the components prone to jamming, reducing the operational efficiency during use. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a mechanical interlocking component for opening and closing a low-pressure drawer unit, which aims to improve the problems of insufficient positioning accuracy of the existing technology, flexible restriction of the drawer in the closed state, and cumbersome operation process caused by overly complex mechanical structure.

[0006] To achieve the above objectives, this utility model adopts the following technical solution: a low-pressure drawer unit opening and closing mechanical interlock assembly, including a cabinet, a drawer body installed inside the cabinet, a slide rail fixedly connected to the outside of the drawer body, a drawer interlock assembly provided on the drawer body, a pin sleeve fixedly connected to the slide rail, a U-shaped ring fixedly connected to the outside of the pin sleeve, a slide rod fixedly connected to the U-shaped ring, a spring one installed inside the pin sleeve, a pin head slidably connected inside the pin sleeve, a spring two installed at the end of the slide rod away from the U-shaped ring, a button installed on the spring two, and the drawer body... The drawer is equipped with a handwheel, a rotating shaft is fixedly connected to the handwheel, and a cam is fixedly connected to the end of the rotating shaft away from the handwheel. A knob is installed on the drawer body, a connecting rod is fixedly connected to the knob, a gear is fixedly connected to the end of the connecting rod away from the knob, a gear is fixedly connected to the end of the rotating shaft near the handwheel, a gear is fixedly connected to the end of the rotating shaft near the cam, a base plate is fixedly connected inside the cabinet, a limiting rack is fixedly connected to the top of the base plate, a slot is provided on the base plate, and a slide is fixedly connected inside the cabinet, with positioning holes provided on the slide. As a further description of the above technical solution: the drawer interlock assembly includes a knob two, which is installed on the drawer body. The top of the drawer body has an installation groove, a gear four is installed in the installation groove, a locking tongue is slidably connected in the installation groove, a latch is fixedly connected to the bottom of the installation groove, a spring three is installed inside the installation groove, and a toothed groove is opened at the bottom of the locking tongue. As a further description of the above technical solution: the drawer body has a shaft hole, the rotating shaft is rotatably connected inside the shaft hole, the drawer body has a mounting hole, the connecting rod is rotatably connected inside the mounting hole, the drawer body has a connecting hole, and the slide rod is slidably connected inside the connecting hole; As a further description of the above technical solution: the drawer body has a shaft hole, the rotating shaft is rotatably connected inside the shaft hole, the drawer body has a mounting hole, the connecting rod is rotatably connected inside the mounting hole, the drawer body has a connecting hole, and the slide rod is slidably connected inside the connecting hole; As a further description of the above technical solution: a handle is fixedly connected to the outside of the drawer body, an electrical component is fixedly connected to the inside of the drawer body, and the cam is slidably connected inside the slot; As a further description of the above technical solution: the two ends of the first spring are respectively fixedly connected to the pin sleeve and the pin head, and the two ends of the second spring are respectively fixedly connected to the slide rod and the button; As a further description of the above technical solution: the drawer body is provided with a second mounting hole, the second knob is rotatably connected inside the second mounting hole, the fourth gear is fixedly connected to the second knob, the bottom of the drawer body is provided with a lock groove, and the lock tongue is slidably connected inside the lock groove; As a further description of the above technical solution: the gear four is meshed on the tooth groove, and the two ends of the spring three are respectively fixedly connected to the mounting groove and the latch.

[0007] This utility model has the following beneficial effects: 1. In this utility model, an elastic pin structure assembled from a pin sleeve, a spring, and a pin head is used. The spring force drives the pin head into the positioning hole, accurately positioning the drawer body and preventing displacement of the drawer body during operation. Through the cooperation of the cam and the slot, the protruding part of the cam slides into the slot, restricting the movement of the drawer body and ensuring that the device is in the working position and cannot move when the relay is closed. The structure is simple and easy to operate, and can effectively improve work efficiency while ensuring safety.

[0008] 2. In this utility model, by setting knob two to drive gear four, the lock tongue is controlled to move up and down, and the lock tongue locks after entering the lock groove, which realizes the interlocking of adjacent drawer bodies. This ensures that operation can only be carried out when adjacent drawer bodies are in the same state, which improves the stability and safety of the equipment during use and avoids the security loopholes caused by only protecting a single drawer body. Attached Figure Description

[0009] Figure 1 This is a three-dimensional schematic diagram of a low-pressure drawer unit opening and closing mechanical interlocking assembly proposed in this utility model; Figure 2 This is a schematic diagram of the structure of a cabinet for a low-voltage drawer unit opening and closing mechanical interlocking assembly proposed in this utility model; Figure 3 This is a schematic diagram of the structure of a drawer in a low-pressure drawer unit mechanical interlock assembly for opening and closing the circuit breaker, as proposed in this utility model. Figure 4 This is a schematic diagram of the slide rod of the mechanical interlocking assembly for opening and closing a low-pressure drawer unit proposed in this utility model; Figure 5 This is a schematic diagram of the structure of the rotating shaft of the low-pressure drawer unit opening and closing mechanical interlocking assembly proposed in this utility model; Figure 6 This is a schematic diagram of the structure of the base plate of the low-pressure drawer unit opening and closing mechanical interlock assembly proposed in this utility model; Figure 7 This is a schematic diagram of the shaft hole structure of a low-pressure drawer unit opening and closing mechanical interlock assembly proposed in this utility model; Figure 8 This is a schematic diagram of the gear groove structure of the mechanical interlocking assembly for opening and closing a low-pressure drawer unit proposed in this utility model; Figure 9 for Figure 8 Enlarged view of point A in the middle.

[0010] Legend: 1. Cabinet body; 2. Drawer body; 3. Slide rail; 4. Drawer interlock assembly; 41. Knob II; 42. Gear IV; 43. Locking tongue; 44. Locking tongue; 45. Spring III; 46. Gear groove; 47. Mounting hole II; 48. Mounting slot; 5. Pin sleeve; 6. U-ring; 7. Slide rod; 8. Spring I; 9. Pin head; 10. Spring II; 11. Button; 12. Handwheel; 13. Rotating shaft; 14. Cam; 15. Knob I; 16. Connecting rod; 17. Gear I; 18. Gear II; 19. Gear III; 20. Base plate; 21. Limiting rack; 22. Locking slot; 23. Slide groove; 24. Positioning hole; 25. Handle; 26. Electrical component; 27. Shaft hole; 28. Mounting hole I; 29. ​​Connecting hole; 30. Gear groove; 31. Lock groove. Detailed Implementation

[0011] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0012] Reference Figures 1-8One embodiment of this utility model includes a cabinet body 1, a drawer body 2 installed inside the cabinet body 1, a slide rail 3 fixedly connected to the outside of the drawer body 2, a drawer interlock assembly 4 provided on the drawer body 2, a pin sleeve 5 fixedly connected to the slide rail 3, a U-shaped ring 6 fixedly connected to the outside of the pin sleeve 5, a slide rod 7 fixedly connected to the U-shaped ring 6, a spring 8 installed inside the pin sleeve 5, a pin head 9 slidably connected inside the pin sleeve 5, and a second spring 10 installed at the end of the slide rod 7 away from the U-shaped ring 6. There is a button 11, a handwheel 12 is installed on the drawer body 2, a rotating shaft 13 is fixedly connected to the handwheel 12, a cam 14 is fixedly connected to the end of the rotating shaft 13 away from the handwheel 12, a knob 15 is installed on the drawer body 2, a connecting rod 16 is fixedly connected to the knob 15, a gear 17 is fixedly connected to the end of the connecting rod 16 away from the knob 15, a gear 2 18 is fixedly connected to the end of the rotating shaft 13 near the handwheel 12, and a gear 3 19 is fixedly connected to the end of the rotating shaft 13 near the cam 14. The cabinet body 1... An internally fixed base plate 20 is provided, with a limiting rack 21 fixedly connected to the top of the base plate 20. A slot 22 is provided on the base plate 20. An internally fixed slide groove 23 is provided, with a positioning hole 24 on the slide groove 23. A shaft hole 27 is provided on the drawer body 2, and a rotating shaft 13 is rotatably connected inside the shaft hole 27. An installation hole 28 is provided on the drawer body 2, and a connecting rod 16 is rotatably connected inside the installation hole 28. A connection hole 29 is provided on the drawer body 2, and a slide rod 7 is slidably connected to the connection hole. Inside 29, the drawer body 2 has a gear groove 30. Gear 1 17 and gear 2 18 are installed in the gear groove 30. Gear 2 18 is meshed and connected directly below gear 1 17. A handle 25 is fixedly connected to the outside of the drawer body 2. An electrical component 26 is fixedly connected to the inside of the drawer body 2. A cam 14 is slidably connected to the inside of the slot 22. The two ends of spring 1 8 are fixedly connected to the pin sleeve 5 and the pin head 9, respectively. The two ends of spring 2 10 are fixedly connected to the slide rod 7 and the button 11, respectively.

[0013] Specifically, when using the low-voltage drawer unit's opening and closing mechanical linkage assembly, the electrical component 26 is first installed in a suitable position on the drawer body 2. When positioning the drawer body 2 is required, it is pulled, during which spring 8 is compressed. When pin 9 moves to the position of positioning hole 24, spring 8 rebounds, applying elastic force to pin 9, causing pin 9 to enter positioning hole 24, thus completing the positioning of drawer body 2. There are three positioning holes 24, corresponding to the working position, test position, and separation position, respectively. When moving the drawer body 2 to another position, button 11 is pressed, compressing spring 10, which then generates... The elastic force drives the slide bar 7 and U-ring 6 to move horizontally, applying a horizontal force to the pin sleeve 5, causing the pin head 9 to be squeezed by the positioning hole 24. The pin head 9 drives the spring 8 to compress, causing the pin head 9 to disengage. At the same time, the operator pulls the handle 25, applying a forward or backward force to the handle 25, which can pull the drawer body 2. After pulling the drawer body 2, the button 11 is released, and the spring 10 rebounds. When the pin head 9 moves to the corresponding positioning hole 24, the drawer body 2 has successfully moved to another position. When the drawer body 2 is in the working position, turning the knob 15 can perform the opening and closing operation of the circuit breaker: when the circuit breaker is in the open state, the protruding part of the cam 14 is upward. At this time, pulling the handle Handle 25 allows the drawer body 2 to move. When knob 15 is turned to put the circuit breaker in the closed state, knob 15 drives gear 17 to rotate, gear 17 drives gear 2 to rotate, and gear 2 18 drives shaft 13 and cam 14 to rotate. After rotating half a turn, the protruding part of cam 14 moves downward and enters the slot 22. At this time, pulling handle 25 will limit the cam 14, preventing the drawer body 2 from moving. When the drawer body 2 is in the non-working position, gear 3 19 will mesh with the limiting rack 21. Due to the limitation of the limiting rack 21, it cannot rotate, preventing shaft 13 and gear 2 18 from rotating. Gear 17 is controlled by gear 2 The 18 knob cannot be rotated, thus locking the knob 15 and preventing the circuit breaker from being opened or closed. Since the circuit breaker cannot leave the working position when it is closed, it must be in the open state at this time. This achieves mechanical linkage for opening and closing the low-voltage drawer unit. By using the elastic pin structure of spring 8 and pin 9, the position of the drawer body 2 can be accurately positioned, so that the drawer body 2 is in a fixed height position after positioning, avoiding displacement. When the relay is closed, the protruding part of the cam 14 enters the slot 22, which can effectively limit the movement of the drawer body 2 in the closed state. The structure is simple and easy to operate, which can effectively improve work efficiency in practical applications.

[0014] Reference Figure 1 , Figure 3 , Figures 7-9The drawer interlock assembly 4 includes a knob 2 41, which is mounted on the drawer body 2. The top of the drawer body 2 has a mounting groove 48, in which a gear 42 is installed. A locking tongue 43 is slidably connected in the mounting groove 48, and a latch 44 is fixedly connected to the bottom of the mounting groove 48. A spring 3 45 is installed inside the mounting groove 48. The bottom of the locking tongue 43 has a toothed groove 46. The drawer body 2 has a mounting hole 2 47, in which the knob 2 41 is rotatably connected. The gear 42 is fixedly connected to the knob 2 41. The bottom of the drawer body 2 has a locking groove 31, in which the locking tongue 43 is slidably connected. The gear 42 is meshed with the toothed groove 46. The two ends of the spring 3 45 are fixedly connected to the mounting groove 48 and the latch 44, respectively.

[0015] Specifically, drawer body 2 has three drawers. When two adjacent drawer bodies 2 are in the same position, rotating knob 2 41 rotates gear 42. Gear 42, through meshing with tooth groove 46, drives the locking tongue 43 to move vertically. When knob 2 41 is rotated counterclockwise, the locking tongue 43 moves vertically upward. After the locking tongue 43 reaches its maximum travel, the latch 44 pops out under the elastic force of spring 3 45, supporting the locking tongue 43 and preventing it from falling back. The locking tongue 43 enters the locking groove 31 of the upper drawer body 2. At this time, the upper and lower drawer bodies 2 are locked together. Movement can only be performed when the relays of both are simultaneously in the open or closed state. When knob 2 41 is rotated clockwise, the lock... Tongue 43 moves vertically downwards, and latch 44 is offset to both sides by the pressure of latch 43. Latch 44 drives spring 3 45 to compress. When latch 43 is fully inserted into the mounting groove 48, the interlocking function between the upper and lower drawer bodies 2 is released. At this time, the upper and lower drawer bodies 2 can move independently. By rotating knob 2 41, latch 43 is driven into the locking groove 31 of the upper drawer body 2, realizing the interlocking effect of adjacent drawers. This effectively improves the convenience when adjacent drawer bodies 2 need to move together in the same position. At the same time, since the relays of the two drawer bodies 2 can only be operated when they are in the same state, the overall stability and safety of operation are improved, avoiding the safety loopholes caused by only protecting a single layer of drawer body 2.

[0016] Working Principle: When using the low-voltage drawer unit's opening and closing mechanical linkage assembly, first, install the electrical component 26 in the appropriate position on the drawer body 2. Pull the drawer body 2; spring 8 is compressed. When the pin 9 moves to the position of the positioning hole 24, spring 8 applies elastic force to the pin 9, causing the pin 9 to enter the positioning hole 24, thus completing the positioning of the drawer body 2. There are three positioning holes 24, corresponding to the working position, test position, and separation position, respectively. When it is necessary to move the drawer body 2, press button 11. Button 11 drives the slide rod 7 and U-ring 6 to move horizontally, applying a horizontal force to the pin sleeve 5, causing the pin 9 to be squeezed by the positioning hole 24. The pin 9 drives spring 8 to compress, causing the pin 9 to disengage. At the same time, the operator pulls the handle 25, applying a forward or backward force to the handle 25 to pull the drawer body 2. When the main body 2 is in the working position, turning knob 15 can perform opening and closing operations on the circuit breaker. When the circuit breaker is in the open state, the protruding part of cam 14 faces upward, and the drawer body 2 can move. When turning knob 15 to close the circuit breaker, knob 15 drives gear 17 to rotate, gear 17 drives gear 2 to rotate, gear 2 drives shaft 13 and cam 14 to rotate, and the protruding part of cam 14 faces downward and enters the slot 22, so the drawer body 2 cannot move. When the drawer body 2 is in the non-working position, gear 3 19 is restricted by the rack 21 and cannot rotate, so shaft 13 and gear 2 18 cannot rotate, and gear 17 is also unable to rotate due to the influence of gear 2 18, thus locking knob 15 and preventing the circuit breaker from performing opening and closing operations. This achieves mechanical linkage for opening and closing the low-voltage drawer unit. The drawer body 2 has three parts. When all three parts are in the working position, turning knob 2 41 rotates gear 42. Gear 42 drives the latch 43 to move vertically through the tooth groove 46. When knob 2 41 is turned counterclockwise, the latch 43 moves vertically upward. When it moves to the appropriate position, the latch 44 pops out under the elastic force of spring 3 45, supporting and limiting the latch 43. The latch 43 enters the locking groove 31 of the upper drawer body 2. When knob 2 41 is turned clockwise, the latch 43 moves vertically downward. The latch 44 is squeezed by the latch 43, and the latch 44 drives spring 3 45 to compress. The latch 44 shifts to both sides, and the latch 43 enters the mounting groove 48, thereby realizing the interlocking control between the upper and lower drawers.

[0017] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A mechanical interlock assembly for opening and closing a low-voltage drawer unit, comprising a cabinet (1), characterized in that: The cabinet (1) has a drawer body (2) installed inside. A slide rail (3) is fixedly connected to the outside of the drawer body (2). A drawer interlock assembly (4) is provided on the drawer body (2). A pin sleeve (5) is fixedly connected to the slide rail (3). A U-shaped ring (6) is fixedly connected to the outside of the pin sleeve (5). A slide rod (7) is fixedly connected to the U-shaped ring (6). A spring (8) is installed inside the pin sleeve (5). A pin head (9) is slidably connected inside the pin sleeve (5). A spring (10) is installed at the end of the slide rod (7) away from the U-shaped ring (6). A button (11) is installed on the spring (10). A handwheel (12) is installed on the drawer body (2). A rotating shaft (13) is fixedly connected to the handwheel (12). The rotating shaft (13) is located away from the handwheel (8). A cam (14) is fixedly connected to one end of the drawer body (2). A knob (15) is installed on the drawer body (2). A connecting rod (16) is fixedly connected to the knob (15). A gear (17) is fixedly connected to the end of the connecting rod (16) away from the knob (15). A gear (28) is fixedly connected to the end of the rotating shaft (13) near the handwheel (12). A gear (3) (19) is fixedly connected to the end of the rotating shaft (13) near the cam (14). A base plate (20) is fixedly connected inside the cabinet (1). A limiting rack (21) is fixedly connected to the top of the base plate (20). A slot (22) is provided on the base plate (20). A slide (23) is fixedly connected inside the cabinet (1). A positioning hole (24) is provided on the slide (23).

2. The low-voltage drawer unit opening and closing mechanical interlock assembly according to claim 1, characterized in that: The drawer interlock assembly (4) includes a knob two (41), which is installed on the drawer body (2). The top of the drawer body (2) has an installation groove (48), a gear four (42) is installed in the installation groove (48), a locking tongue (43) is slidably connected in the installation groove (48), a latch (44) is fixedly connected to the bottom of the installation groove (48), a spring three (45) is installed inside the installation groove (48), and a toothed groove (46) is opened at the bottom of the locking tongue (43).

3. The low-voltage drawer unit opening and closing mechanical interlock assembly according to claim 1, characterized in that: The drawer body (2) has a shaft hole (27), the rotating shaft (13) is rotatably connected inside the shaft hole (27), the drawer body (2) has a mounting hole (28), the connecting rod (16) is rotatably connected inside the mounting hole (28), the drawer body (2) has a connecting hole (29), and the slide rod (7) is slidably connected inside the connecting hole (29).

4. The low-voltage drawer unit opening and closing mechanical interlock assembly according to claim 1, characterized in that: The drawer body (2) has a gear groove (30) inside. Gear 1 (17) and gear 2 (18) are both installed in the gear groove (30). Gear 2 (18) is meshed and connected directly below gear 1 (17).

5. The low-voltage drawer unit opening and closing mechanical interlock assembly according to claim 1, characterized in that: The drawer body (2) is externally fixedly connected to a handle (25), and the drawer body (2) is internally fixedly connected to an electrical component (26). The cam (14) is slidably connected inside the slot (22).

6. The low-voltage drawer unit opening and closing mechanical interlock assembly according to claim 1, characterized in that: The two ends of the first spring (8) are fixedly connected to the pin sleeve (5) and the pin head (9) respectively, and the two ends of the second spring (10) are fixedly connected to the slide rod (7) and the button (11) respectively.

7. The low-voltage drawer unit opening and closing mechanical interlock assembly according to claim 2, characterized in that: The drawer body (2) has a second mounting hole (47), the second knob (41) is rotatably connected inside the second mounting hole (47), the fourth gear (42) is fixedly connected to the second knob (41), the bottom of the drawer body (2) has a lock groove (31), and the lock tongue (43) is slidably connected inside the lock groove (31).

8. The low-voltage drawer unit opening and closing mechanical interlock assembly according to claim 2, characterized in that: The gear four (42) is meshed on the tooth groove (46), and the two ends of the spring three (45) are fixedly connected to the mounting groove (48) and the latch (44) respectively.

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