Low-voltage cabinet with drawer-type electrical installation

Abstract

This invention discloses a low-voltage switchgear with a drawer-type electrical installation structure, relating to the field of low-voltage switchgear technology. It includes a low-voltage switchgear cabinet, with several layered partitions within the cabinet's internal cavity. Fixed guide rails are symmetrically arranged on the partitions within the cabinet's internal cavity, and drawer units are slidably mounted on these guide rails. The switchgear also includes an anti-detachment mechanism and a gravity balancing mechanism disposed within the cabinet's internal cavity. Through the coordinated operation of the anti-detachment mechanism and the gravity balancing mechanism, the anti-detachment mechanism adjusts the locking position via an adjustable distance component and controls the maximum pull-out distance of the drawer unit via a limiting protrusion. The gravity balancing mechanism adjusts the center of gravity of the drawer unit through the pulling force of a counterweight ball. The two mechanisms work together to prevent instability in the low-voltage switchgear cabinet's center of gravity due to the upper drawer unit being pulled out, further improving the overall stability of the low-voltage switchgear during maintenance and assembly, ensuring operator safety and the stable state of electrical components.

Description

Technical Field

[0001] This invention relates to the field of low-voltage switchgear technology, specifically to a low-voltage switchgear with a drawer-type electrical installation structure. Background Technology

[0002] With the continuous improvement of industrial automation and the ongoing upgrading of power systems, low-voltage switchgear, as the core equipment in electrical systems used for the installation, protection, and control of electrical components, has expanded its application scenarios to multiple key areas such as industrial production, building power distribution, rail transit, and new energy power plants. It undertakes the important mission of ensuring the stable operation of electrical equipment, optimizing power distribution, and reducing safety risks. Currently, drawer-type low-voltage switchgear, due to its advantages such as categorized installation of electrical components and convenient maintenance, is gradually replacing traditional fixed low-voltage switchgear and has become the mainstream product in the market.

[0003] Chinese patent publication number CN116207638A discloses a drawer-type low-voltage switchgear, including a cabinet body. The cabinet body has multiple drawers and multiple dividers inside, with each divider corresponding to one of the drawers. The dividers are fixedly installed inside the cabinet body, and the drawers are mounted above the dividers via a pull-out mechanism for easy maintenance. This design not only allows for comprehensive maintenance of the electrical components inside the drawers and the connectors at the rear of the drawers without disassembling them, improving the convenience of maintenance for drawer-type low-voltage switchgear, but also solves the problem of the upper drawer obstructing the lower drawer when two adjacent drawers are pulled out simultaneously.

[0004] However, most drawer-type low-voltage switchgear currently on the market only have basic drawer pull-out functions, and their structural design has obvious deficiencies. The drawer units are mostly simple guide rail sliding cooperation, lacking an effective anti-detachment limit structure. When operators pull out the drawers for inspection or maintenance, they are prone to accidentally causing the drawer units to fall out due to excessive force, which may not only damage electrical components but also pose a safety hazard. In addition, some multi-layer drawer-type low-voltage switchgear do not have a gravity balance mechanism. When the upper drawer unit is fully pulled out, the overall center of gravity of the cabinet will shift, which may cause the cabinet to tilt and sway, affecting operational safety.

[0005] Therefore, developing a low-voltage switchgear with a drawer-type electrical installation structure that features anti-detachment and gravity balance functions, high space utilization, and convenient operation has become an urgent technical problem to be solved. Summary of the Invention

[0006] This invention provides a low-voltage switchgear with a drawer-type electrical installation structure, which can effectively solve the problems mentioned in the background art, such as the lack of pull-out limit and the overall imbalance caused by the upper drawer unit being pulled out.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a low-voltage cabinet with a drawer-type electrical installation structure, comprising a low-voltage cabinet body, wherein a plurality of layered partitions are provided in the inner cavity of the low-voltage cabinet body, and fixed guide rails are symmetrically arranged on the partitions on the inner cavity of the low-voltage cabinet body, and drawer units are slidably arranged on the guide rails, and further comprising an anti-detachment mechanism and a gravity balance mechanism provided in the inner cavity of the low-voltage cabinet body; The anti-detachment mechanism includes an adjusting component and a locking component. The adjusting component includes a ball screw and a sliding groove disposed on the drawer unit. A ball nut is disposed on the ball screw, and a sliding block is disposed below the ball nut. A limit protrusion is disposed in the sliding groove. The locking component includes a through rod symmetrically disposed above the sliding block, and a return spring is sleeved on the through rod. The gravity balancing mechanism includes rotating rods symmetrically arranged in the drawer unit. A take-up reel is fixedly installed on the rotating rod. A take-up groove is opened on the take-up reel. A traction rope is wound in the take-up groove. A counterweight ball is provided on the traction rope.

[0008] Preferably, there are two limiting protrusions, symmetrically distributed at both ends of the sliding groove. The sliding groove is located in the middle of the layered partition. The weight of the counterweight ball is matched with the rated weight of the drawer unit, so that the force is balanced during the drawer unit's pulling process.

[0009] Preferably, the drawer unit includes a drawer basket, a drawer panel is fixedly installed on one side of the drawer basket, guide rail grooves are symmetrically opened on both sides of the drawer basket, the drawer basket is slidably connected to the fixed guide rail through the guide rail grooves, and pull-out handles are symmetrically installed on the drawer panel.

[0010] Preferably, the drawer basket has a groove in the middle, the side wall of the groove is rotatably connected to the ball screw, a limit ring is fixedly installed on the outer surface of the ball screw, the limit ring is in contact with the groove wall, one end of the ball screw passes through the drawer panel, and a hexagonal nut is fixedly installed at the end of the ball screw that passes through the drawer panel.

[0011] Preferably, the drawer basket has symmetrical grooves in the middle, the symmetrical grooves are adapted to the through rods, the symmetrical grooves are connected to the grooves, the inner wall of the grooves is slidably connected to the ball nuts, the ball nuts have symmetrical through holes, the inner wall of the through holes is slidably connected to the through rods, and the through rods pass through the symmetrical grooves.

[0012] Preferably, a synchronizing block is fixedly installed at the end of the through rod away from the sliding block. The synchronizing block is in contact with the drawer basket under the restriction of the return spring, and a buffer damping is fixedly installed on the side wall of the sliding block.

[0013] Preferably, the side of the sliding block away from the through rod is in contact with the bottom of the sliding groove under the constraint of the return spring. The return spring is located between the sliding block and the ball nut, and the two ends of the return spring abut against the upper surface of the sliding block and the lower surface of the ball nut, respectively, to ensure the stable return function of the return spring.

[0014] Preferably, the gravity balancing mechanism further includes receiving slots symmetrically arranged on both sides of the drawer basket, the rotating rod is located in the receiving slots, the rotating rod is provided with connecting seats at both ends, the bottom of the connecting seats is fixedly connected to the layered partition, the connecting seats are rotatably connected to the rotating rod, and the outer surface of the rotating rod is fixedly provided with limit rings, the limit rings are located on both sides of the connecting seats.

[0015] Preferably, the rotating rod has a threaded groove in the middle, a threaded rod is threadedly connected in the threaded groove, a fixing strip is fixedly connected to the side of the threaded rod away from the take-up reel, and a plug-in hole is opened through the fixing strip, and a plug-in rod is inserted into the plug-in hole.

[0016] Preferably, the drawer panel has symmetrical square slots, through which a fixing strip passes. The fixing strip is perpendicular to the connecting rod. The connecting rod is located on the side of the drawer panel away from the drawer basket, and the end of the connecting rod is provided with a grip for easy insertion and removal, which facilitates manual adjustment by the operator.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows: Unlike existing solutions that rely solely on fixed limits or a single counterweight structure for control, this invention integrates stroke limit adjustment and center of gravity compensation mechanisms into the drawer unit's pull-out motion. This allows the anti-slip mechanism and the gravity balance mechanism to be linked through the drawer's pull-out motion, thereby simultaneously achieving limit control and center of gravity compensation during the same movement. This collaborative design helps overcome the instability caused by the independent functions in traditional structures, improving the overall stability and safety of the drawer during the pull-out process. This invention utilizes the coordinated operation of the anti-detachment mechanism's adjusting and locking components. The limiting protrusions at both ends of the sliding groove precisely restrict the movement range of the sliding block, while the return spring continuously provides elastic force to the through rod to ensure the locking component is in a stable and ready state. This achieves the effect of preventing the drawer unit from accidentally detaching due to excessive pulling force and improving the safety of low-voltage cabinets. At the same time, the buffer damping on the side wall of the sliding block reduces the collision impact between the sliding block and the limiting protrusions, thus protecting components and extending the service life of the anti-detachment mechanism. This invention utilizes a gravity balance mechanism with a symmetrically arranged rotating rod, a take-up reel, a traction rope, and a counterweight ball working in tandem. The rotating rod drives the take-up reel to rotate, thus releasing and retracting the traction rope. When the drawer unit is pulled out, the counterweight ball at the end of the traction rope generates a downward pull under gravity. This pull precisely counteracts the gravity of the drawer unit during its operation, achieving gravity balance and effectively preventing the drawer unit from jamming or becoming difficult to pull out due to its own weight or uneven force. It also prevents the drawer unit from tilting or falling off due to gravity imbalance when fully pulled out, further improving the smoothness and safety of the drawer unit's operation. This invention utilizes an anti-detachment mechanism and a gravity balancing mechanism working in tandem. The anti-detachment mechanism adjusts the locking position using an adjustable distance component and controls the maximum pull-out distance of the drawer unit using a limit protrusion. The gravity balancing mechanism adjusts the center of gravity of the drawer unit using a counterweight ball. Together, they prevent the low-voltage cabinet from becoming unstable due to the upper drawer unit being pulled out, further improving the overall stability of the low-voltage cabinet during maintenance and assembly, and ensuring the safety of operators and the stable state of electrical components. Attached Figure Description

[0018] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention and do not constitute a limitation thereof.

[0019] In the attached diagram: Figure 1 This is a three-dimensional structural schematic diagram of the present invention; Figure 2 This is a schematic diagram of the drawer unit in the opened state of the present invention; Figure 3 This is a schematic diagram of the drawer unit of the present invention in the open state from another perspective; Figure 4 This is a schematic diagram of the overall structure of the drawer unit of the present invention; Figure 5 This is a schematic diagram of the adjustable distance component structure of the present invention; Figure 6 This is a partial cross-sectional view of the locking component of the present invention; Figure 7 This is a partial structural diagram of the drawer unit of the present invention; Figure 8 This is a partial structural diagram of the locking component of the present invention; Figure 9 This is a schematic diagram of the gravity balancing mechanism of the present invention; Figure 10 This is a cross-sectional schematic diagram of the gravity balance mechanism of the present invention; Numbering on the map: 1. Low-pressure cabinet body; 11. Shelves; 12. Fixed guide rails; 13. Drawer unit; 131. Drawer basket; 132. Drawer front panel; 133. Guide rail groove; 134. Pull-out handle; 2. Anti-detachment mechanism; 21. Adjustment assembly; 211. Groove; 212. Ball screw; 213. Limiting ring; 214. Ball nut; 215. Sliding block; 216. Buffer damping; 217. Hexagonal nut; 218. Sliding groove; 219. Limiting protrusion; 22. Locking assembly; 221. Through hole; 222. Through rod; 223. Symmetrical groove; 224. Synchronizing block; 225. Return spring; 3. Gravity balancing mechanism; 31. Receiving groove; 32. Connecting seat; 33. Rotating rod; 34. Threaded groove; 35. Take-up reel; 36. Take-up groove; 37. Traction rope; 38. Counterweight ball; 39. Limiting ring; 310. Threaded rod; 311. Fixing strip; 312. Insertion hole; 313. Insertion rod; 314. Square groove. Detailed Implementation

[0020] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0021] Example: Figures 1 to 10 As shown, the present invention provides a low-voltage cabinet with a drawer-type electrical installation structure, including a low-voltage cabinet body 1, a plurality of layered partitions 11 are provided in the inner cavity of the low-voltage cabinet body 1, fixed guide rails 12 are symmetrically arranged on the partitions on the inner cavity of the low-voltage cabinet body 1, and drawer units 13 are slidably arranged on the guide rails. It also includes an anti-detachment mechanism 2 and a gravity balance mechanism 3 provided in the inner cavity of the low-voltage cabinet body 1. The drawer unit 13 includes a drawer basket 131, a drawer panel 132 fixedly installed on one side of the drawer basket 131, and guide rail grooves 133 symmetrically opened on both sides of the drawer basket 131. The drawer basket 131 is slidably connected to the fixed guide rail 12 through the guide rail grooves 133, and pull-out handles 134 are symmetrically installed on the drawer panel 132. In the above embodiment, by sliding the guide rail grooves 133 on both sides of the drawer basket 131 to the fixed guide rails 12 on the layered partition 11, and cooperating with the pull handles 134 on the drawer panel 132, the drawer unit 13 can be smoothly pulled out and pulled out in the low-voltage cabinet 1, which is convenient for operators to install, inspect and maintain the electrical components in the drawer unit 13. At the same time, the layered partition 11 can realize the layered arrangement of multiple drawer units 13, improve the utilization rate of the internal space of the low-voltage cabinet 1, and avoid the messy stacking of electrical components. The low-voltage cabinet controls the pull-out distance of the drawer unit 13 through the anti-detachment mechanism 2. The drawer unit 13 is linked with the gravity balance mechanism 3 so that the pull-out distance of the drawer unit 13 is balanced with the center of gravity, so as to avoid the overall center of gravity of the low-voltage cabinet 1 becoming unstable after the upper drawer unit 13 is pulled out, and further improve the stability of the low-voltage cabinet 1 during maintenance or assembly.

[0022] An anti-detachment mechanism 2 for a low-voltage switchgear with a drawer-type electrical installation structure includes an adjusting component 21 and a locking component 22. The adjusting component 21 includes a ball screw 212 and a sliding groove 218 disposed on the drawer unit 13. A ball nut 214 is disposed on the ball screw 212, and a sliding block 215 is disposed below the ball nut 214. A limit protrusion 219 is disposed in the sliding groove 218. The locking component 22 includes a through rod 222 symmetrically disposed above the sliding block 215, and a return spring 225 is sleeved on the through rod 222. In the above embodiment, through the coordinated cooperation of the adjusting component 21 and the locking component 22, the adjusting component 21 can flexibly adjust the position of the locking component 22 according to the pull-out stroke of the drawer unit 13. The limiting protrusion 219 in the sliding groove 218 can limit the movement range of the sliding block 215, preventing the operator from using too much force and causing the drawer unit 13 to detach from the low-voltage cabinet body 1. The return spring 225 provides a continuous elastic force to the through rod 222, ensuring that the locking component 22 is always in a stable locking ready state, thereby realizing the anti-detachment limit of the drawer unit 13, preventing the drawer unit 13 from accidentally detaching during use, and improving the safety of the low-voltage cabinet.

[0023] Among them, there are two limiting protrusions 219, which are symmetrically distributed at both ends of the sliding groove 218. The sliding groove 218 is set in the middle of the layered partition 11. The weight of the counterweight ball 38 is matched with the rated weight of the drawer unit 13, so that the force is balanced during the drawer unit 13 is pulled out. Furthermore, a groove 211 is provided in the middle of the drawer basket 131. The side wall of the groove 211 is rotatably connected to the ball screw 212. A limit ring 213 is fixedly installed on the outer surface of the ball screw 212. The limit ring 213 fits against the groove wall of the groove 211. One end of the ball screw 212 passes through the drawer panel 132. A hexagonal nut 217 is fixedly provided at the end of the ball screw 212 that passes through the drawer panel 132. In the above embodiment, a groove 211 is provided in the middle of the drawer basket 131 to provide a stable installation space for the ball screw 212 and the ball nut 214. The ball screw 212 is rotatably connected to the side wall of the groove 211 to ensure the stability of the ball screw 212 during rotation. The limiting ring 213 fits against the groove wall of the groove 211 to axially limit the ball screw 212 and prevent the ball screw 212 from axially shifting during rotation. A hexagonal nut 217 is fixedly provided on one side of the drawer panel 132, which allows the operator to rotate the ball screw 212 with an electric screwdriver to adjust the position of the ball nut 214 and the sliding block 215. This enables synchronous adjustment of the position of the adjusting component 21 and the locking component 22 in the anti-detachment mechanism 2. The operation is convenient and the adjustment accuracy is high. It should be noted that the electric screwdriver can be set to rotate a certain number of revolutions so that the displacement distance of the ball screw 212 driving the screw nut is controllable.

[0024] It should be noted that the drawer basket 131 has symmetrical grooves 223 in the middle, which are matched with the through rod 222. The symmetrical grooves 223 and the grooves 211 are interconnected. The inner wall of the groove 211 is slidably connected to the ball nut 214. The ball nut 214 has symmetrical through holes 221. The inner wall of the through holes 221 is slidably connected to the through rod 222. The through rod 222 passes through the symmetrical grooves 223. Furthermore, a synchronization block 224 is fixedly installed at the end of the through rod 222 away from the sliding block 215. The synchronization block 224 is in contact with the drawer basket 131 under the restriction of the return spring 225. A buffer damper 216 is fixedly installed on the side wall of the sliding block 215. The side of the sliding block 215 away from the through rod 222 is in contact with the bottom of the sliding groove 218 under the restriction of the return spring 225. The return spring 225 is located between the sliding block 215 and the ball nut 214, and the two ends of the return spring 225 abut against the upper surface of the sliding block 215 and the lower surface of the ball nut 214 respectively, to ensure the stable return function of the return spring 225. In the above embodiment, the symmetrical groove 223 and the through rod 222 are adapted to guide the sliding of the through rod 222, ensuring that the through rod 222 can move in a fixed direction. The synchronous block 224 enables the two through rods 222 to move synchronously, ensuring that the sliding block 215 can move up and down stably. The two ends of the return spring 225 abut against the sliding block 215 and the ball nut 214 respectively, which can stably provide a return force, so that the sliding block 215 is always in contact with the bottom of the sliding groove 218. At the same time, the buffer damper 216 can play a buffering role when the sliding block 215 moves, reducing the collision impact between the sliding block 215 and the limiting protrusion 219, extending the service life of the anti-detachment mechanism 2, and further improving the operational stability of the anti-detachment mechanism 2.

[0025] A gravity balancing mechanism 3 of a low-voltage switchgear with a drawer-type electrical installation structure includes a rotating rod 33 symmetrically arranged in a drawer unit 13. A take-up reel 35 is fixedly installed on the rotating rod 33. A take-up groove 36 is opened on the take-up reel 35. A traction rope 37 is wound in the take-up groove 36. A counterweight ball 38 is provided on the traction rope 37. In the above embodiment, the rotating rod 33 drives the take-up reel 35 to rotate, thereby realizing the winding and unwinding of the traction rope 37. When the drawer unit 13 is pulled open, the counterweight ball 38 at the end of the traction rope 37 generates a downward pulling force under the action of gravity. This pulling force cancels out the gravity of the drawer unit 13 when it is pulled out, thereby achieving gravity balance during the process of pulling out the drawer unit 13. This avoids the drawer unit 13 from being stuck or difficult to pull out due to its own excessive weight or uneven force. At the same time, it can prevent the drawer unit 13 from tilting or falling off due to gravity imbalance when it is fully pulled out, thereby improving the smoothness and safety of pulling out the drawer unit 13.

[0026] The gravity balance mechanism 3 also includes receiving slots 31 symmetrically arranged on both sides of the drawer basket 131. The rotating rod 33 is located in the receiving slots 31. The two ends of the rotating rod 33 are provided with connecting seats 32. The bottom of the connecting seats 32 is fixedly connected to the layered partition 11. The connecting seats 32 and the rotating rod 33 are rotatably connected. The outer surface of the rotating rod 33 is fixedly provided with limit rings 39, which are located on both sides of the connecting seats 32. In the above embodiment, by providing receiving slots 31 on both sides of the drawer basket 131, components such as the rotating rod 33 and the take-up reel 35 can be stored therein, avoiding the components from being exposed and occupying space, while protecting the components from external collision damage. The connecting seat 32 fixes the rotating rod 33 to the layered partition 11 to ensure the installation stability of the gravity balance mechanism 3. The rotating rod 33 is rotatably connected to the connecting seat 32 to ensure that the rotating rod 33 can rotate flexibly to realize the take-up and release of the traction rope 37. The limiting ring 39 is located on both sides of the connecting seat 32 and can axially limit the rotating rod 33 to prevent the rotating rod 33 from axially deviating during rotation, ensuring the stability of the take-up reel 35 in taking up and releasing the traction rope 37, thereby ensuring the gravity balance effect.

[0027] Furthermore, a threaded groove 34 is provided in the middle of the rotating rod 33, and a threaded rod 310 is threadedly connected in the threaded groove 34. A fixing strip 311 is fixedly connected to the side of the threaded rod 310 away from the take-up reel 35. A plug-in hole 312 is provided through the fixing strip 311, and a plug-in rod 313 is inserted into the plug-in hole 312. In the above embodiment, the threaded groove 34 in the middle of the rotating rod 33 is threadedly connected to the threaded rod 310, so the length of the threaded rod 310 extending out of the rotating rod 33 can be adjusted. The insertion hole 312 on the fixing strip 311 cooperates with the insertion rod 313, so that the fixing strip 311 and the drawer panel 132 can be relatively fixed. Thus, when the drawer unit 13 is pulled out, the fixing strip 311 horizontally pulls the threaded rod 310 and causes the rotating rod 33 to rotate at a uniform speed. At the same time, during the rotation of the rotating rod 33, the take-up reel 35 unwinds, and the counterweight ball 38 gradually decreases in height as the drawer unit 13 is pulled out, ensuring the balance effect of the gravity balance mechanism 3.

[0028] Furthermore, square slots 314 are symmetrically provided on the drawer panel 132. The square slots 314 are penetrated by a fixing strip 311. The fixing strip 311 is perpendicular to the plug rod 313. The plug rod 313 is located on the side of the drawer panel 132 away from the drawer basket 131, and the end of the plug rod 313 is provided with a grip part for easy insertion and removal, which is convenient for the operator to manually adjust.

[0029] In the above embodiment, the square groove 314 on the drawer panel 132 provides a through channel for the fixing strip 311, ensuring that the fixing strip 311 can extend smoothly to the outside of the drawer panel 132. The fixing strip 311 and the plug rod 313 are set perpendicular to each other, so that the plug rod 313 can be stably inserted into the plug hole 312 under the influence of gravity, thereby achieving relative fixation between the fixing strip 311 and the drawer panel 132. The plug rod 313 is located on the outside of the drawer panel 132 and has a grip at the end, which makes it convenient for the operator to manually insert and remove the plug rod 313, facilitates quick unlocking or fixing of the rotating rod 33, improves the convenience of operation, reduces the workload of the operator, and the symmetrical structure ensures uniform fixing effect, further improving the stability of the gravity balance mechanism 3.

[0030] It should be noted that only a few drawer units 13 located at the top are equipped with gravity balancing mechanisms 3, and the various receiving slots 31 are arranged in a staggered manner, which can effectively avoid mutual interference between the counterweight balls 38. At the same time, the placement of the counterweight balls 38 is reasonably planned and will not affect the layout and connection of the rear wiring.

[0031] Based on all the above embodiments, the working principle and usage process of the present invention are as follows: The core design of this low-voltage switchgear is to facilitate the installation, inspection and maintenance of electrical components through a layered drawer-type structure. At the same time, the anti-detachment mechanism 2 and the gravity balance mechanism 3 ensure the safety and smooth operation of the drawer unit 13.

[0032] First, the layered partitions 11 inside the low-voltage cabinet 1 divide the cabinet into multiple independent installation spaces. Each layered partition 11 has symmetrically arranged fixed guide rails 12, which serve as the sliding carrier for the drawer units 13. The drawer units 13 slide with the fixed guide rails 12 via guide rail grooves 133 on both sides of the drawer basket 131. Operators can easily pull the drawer units 13 out of the cabinet or push them in using the pull handles 134 on the drawer panel 132. When pulled out, the drawer units 13 move smoothly along the fixed guide rails 12, facilitating the installation, wiring, or maintenance of electrical components within the drawer basket 131. When pushed in, the guide rail grooves 133 precisely engage with the fixed guide rails 12, ensuring the drawer units 13 are firmly positioned within the cabinet, preventing shaking from affecting the normal operation of electrical components. The layered partitions 11 not only improve the utilization rate of the cabinet's internal space but also allow for the categorized arrangement of different types of electrical components, preventing circuit interference or malfunctions caused by cluttered components. The core function of the anti-detachment mechanism 2 is to prevent the drawer unit 13 from accidentally detaching during pulling or use. The anti-detachment function is achieved by the adjusting component 21 and the locking component 22 working together. The specific working process is as follows: During the adjustment process, the operator uses an electric screwdriver to set a fixed number of rotations and rotates the hexagonal nut 217 on the outside of the drawer panel 132, causing the ball screw 212 to rotate within the groove 211 in the middle of the drawer basket 131. Because the ball screw 212 is rotatably connected to the side wall of the groove 211, and the limiting ring 213 on its outer surface is in contact with the groove wall of the groove 211, axial displacement during rotation of the ball screw 212 is prevented, ensuring rotational stability. When the ball screw 212 rotates, the mating ball nut 214 slides along the inner wall of the groove 211. The movement of the sliding block 215 below causes it to move within the sliding groove 218, achieving synchronous position adjustment of the adjusting component 21 and the locking component 22. The limiting protrusions 219 at both ends of the sliding groove 218 limit the movement range of the sliding block 215, preventing excessive movement of the sliding block 215 and thus preventing the locking component 22 from failing. When the operator pulls the drawer unit 13 to its limit position, the sliding block 215 is blocked by the limiting protrusions 219, preventing the drawer unit 13 from being pulled outwards further and avoiding the drawer unit 13 from detaching from the cabinet due to excessive pulling force. Among them, the through rod 222 on the ball nut 214 passes through the symmetrical groove 223 of the drawer basket 131 and is fixedly connected to the sliding block 215. The two ends of the return spring 225 on the through rod 222 abut against the ball nut 214 and the sliding block 215 respectively, continuously providing downward elastic force to the sliding block 215, so that the sliding block 215 always fits against the bottom of the sliding groove 218 and maintains a stable sliding state. The synchronizing block 224 ensures that the two through rods 222 move synchronously. The buffer damping 216 on the side wall of the sliding block 215 can play a buffering role when the sliding block 215 moves to the limiting protrusion 219, reducing the collision impact between the sliding block 215 and the limiting protrusion 219, avoiding component wear, extending the service life of the anti-detachment mechanism 2, and improving the stability of the mechanism operation. The return spring 225 is sleeved on the through rod 222, and its two ends abut against the upper surface of the sliding block 215 and the lower surface of the ball nut 214, respectively. It always provides a downward elastic force to the sliding block 215, so that the side of the sliding block 215 away from the through rod 222 is tightly fitted with the bottom of the sliding groove 218. At this time, the synchronizing block 224 is fitted with the drawer basket 131 under the restriction of the return spring 225, and the locking component 22 is in a pre-locking state. When the drawer unit 13 is pulled out to the designated position, the through rod 222 is fitted with the corresponding locking structure of the cabinet under the action of the return spring 225, thereby locking the drawer unit 13 and preventing it from accidentally coming out. When unlocking is required, the synchronizing block 224 in the adjusting component 21 drives the sliding block 215 to rise and compress the return spring 225, driving the sliding block 215 away from the limiting protrusion 219 and fitting it against the groove wall at the upper end of the sliding groove 218. At this time, the drawer unit 13 can be pulled out normally.

[0033] The core function of the gravity balancing mechanism 3 is to balance the gravity during the pulling and pulling process of the drawer unit 13, preventing it from getting stuck, requiring effort, or tilting. The specific working process is as follows: When the operator pulls out the drawer unit 13, the fixing strip 311 on the drawer panel 132 pulls the threaded rod 310 horizontally under the limit of the plug rod 313, thereby driving the rotating rod 33 to rotate on the connecting seat 32, causing the take-up reel 35 and the rotating rod 33 to rotate synchronously. The traction rope 37 is then released from the take-up groove 36. The counterweight ball 38 moves downward under the action of gravity, generating a downward pulling force, which cancels out the gravity of the drawer unit 13, realizing the gravity balance during the drawer unit 13's pulling process, ensuring smooth and uninterrupted pulling.

[0034] After the drawer unit 13 is repaired, the operator inserts the plug rod 313 into the plug hole 312 on the fixing strip 311. Since the fixing strip 311 and the plug rod 313 are perpendicular to each other, the fixing strip 311 and the drawer panel 132 can be fixed relative to each other. When the drawer unit 13 is pushed into the cabinet, the rotating rod 33 rotates in the opposite direction, which drives the cord reel 35 to rotate in the opposite direction, and retracts the traction rope 37 into the cord reel 36, thus completing the reset.

[0035] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention 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 invention should be included within the protection scope of the present invention.

Claims

1. A low-voltage cabinet with a drawer-type electrical installation structure, comprising a low-voltage cabinet body (1), wherein the inner cavity of the low-voltage cabinet body (1) is provided with a plurality of layered partitions (11), and fixed guide rails (12) are symmetrically arranged on the partitions on the inner cavity of the low-voltage cabinet body (1), and drawer units (13) are slidably arranged on the guide rails, characterized in that: It also includes an anti-detachment mechanism (2) and a gravity balance mechanism (3) installed in the inner cavity of the low-voltage cabinet (1). The anti-detachment mechanism (2) includes an adjusting component (21) and a locking component (22). The adjusting component (21) includes a ball screw (212) and a sliding groove (218) disposed on the drawer unit (13). A ball nut (214) is disposed on the ball screw (212). A sliding block (215) is disposed below the ball nut (214). A limit protrusion (219) is disposed in the sliding groove (218). The locking component (22) includes a through rod (222) symmetrically disposed above the sliding block (215). A return spring (225) is sleeved on the through rod (222). The gravity balancing mechanism (3) includes a rotating rod (33) symmetrically arranged in the drawer unit (13). A take-up reel (35) is fixedly installed on the rotating rod (33). A take-up groove (36) is opened on the take-up reel (35). A traction rope (37) is wound in the take-up groove (36). A counterweight ball (38) is provided on the traction rope (37).

2. A low-voltage switchgear with a drawer-type electrical installation structure according to claim 1, characterized in that, There are two limiting protrusions (219), which are symmetrically distributed at both ends of the sliding groove (218). The sliding groove is set in the middle of the layered partition. The weight of the counterweight ball (38) is matched with the rated weight of the drawer unit (13), so that the drawer unit (13) is subjected to balanced force during the pulling process.

3. A low-voltage switchgear with a drawer-type electrical installation structure according to claim 1, characterized in that, The drawer unit (13) includes a drawer basket (131), a drawer panel (132) is fixedly installed on one side of the drawer basket (131), and guide rail grooves (133) are symmetrically opened on both sides of the drawer basket (131). The drawer basket (131) is slidably connected to the fixed guide rail (12) through the guide rail grooves (133). Pull-out handles (134) are symmetrically installed on the drawer panel (132).

4. A low-voltage switchgear with a drawer-type electrical installation structure according to claim 3, characterized in that, The drawer basket (131) has a groove (211) in the middle. The side wall of the groove (211) is rotatably connected to the ball screw (212). A limit ring (213) is fixedly installed on the outer surface of the ball screw (212). The limit ring (213) fits against the groove wall of the groove (211). One end of the ball screw (212) passes through the drawer panel (132). A hexagonal nut (217) is fixedly installed at the end of the ball screw (212) that passes through the drawer panel (132).

5. A low-voltage switchgear with a drawer-type electrical installation structure according to claim 4, characterized in that, The drawer basket (131) has symmetrical grooves (223) symmetrically opened in the middle. The symmetrical grooves (223) are adapted to the through rods (222). The symmetrical grooves (223) are connected to the grooves (211). The inner wall of the grooves (211) is slidably connected to the ball nuts (214). The ball nuts (214) have symmetrical through holes (221). The inner wall of the through holes (221) is slidably connected to the through rods (222). The through rods (222) pass through the symmetrical grooves (223).

6. A low-voltage switchgear with a drawer-type electrical installation structure according to claim 5, characterized in that, The end of the through rod (222) away from the sliding block (215) is fixedly installed with a synchronizing block (224). The synchronizing block (224) is in contact with the drawer basket (131) under the restriction of the return spring (225). The side wall of the sliding block (215) is fixedly installed with a buffer damper (216).

7. A low-voltage switchgear with a drawer-type electrical installation structure according to claim 6, characterized in that, The side of the sliding block (215) away from the through rod (222) is in contact with the bottom of the sliding groove (218) under the restriction of the return spring (225). The return spring (225) is located between the sliding block (215) and the ball nut (214), and the two ends of the return spring (225) abut against the upper surface of the sliding block (215) and the lower surface of the ball nut (214) respectively, to ensure the stable reset function of the return spring (225).

8. A low-voltage switchgear with a drawer-type electrical installation structure according to claim 1, characterized in that, The gravity balancing mechanism (3) also includes receiving slots (31) symmetrically arranged on both sides of the drawer basket (131). The rotating rod (33) is located in the receiving slot (31). The rotating rod (33) is provided with connecting seats (32) at both ends. The bottom of the connecting seat (32) is fixedly connected to the layered partition (11). The connecting seat (32) and the rotating rod (33) are rotatably connected. The outer surface of the rotating rod (33) is fixedly provided with a limit ring (39). The limit ring (39) is located on both sides of the connecting seat (32).

9. A low-voltage switchgear with a drawer-type electrical installation structure according to claim 8, characterized in that, The rotating rod (33) has a threaded groove (34) in the middle, and a threaded rod (310) is threadedly connected in the threaded groove (34). A fixing strip (311) is fixedly connected to the side of the threaded rod (310) away from the take-up reel (35). A plug hole (312) is opened through the fixing strip (311), and a plug rod (313) is inserted into the plug hole (312).

10. A low-voltage switchgear with a drawer-type electrical installation structure according to claim 3, characterized in that, The drawer panel (132) is symmetrically provided with square slots (314), and the square slots (314) are penetrated by fixing strips (311). The fixing strips (311) are perpendicular to the plug rods (313). The plug rods (313) are located on the side of the drawer panel (132) away from the drawer basket (131), and the end of the plug rods (313) is provided with a grip part for easy insertion and removal, so that the operator can adjust it manually.

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