A low voltage drawer cabinet

Abstract

The present application relates to a low-voltage drawer cabinet, and relates to the technical field of drawer cabinets, which comprises a cabinet body, wherein the cabinet body is provided with a plurality of installation cavities in a vertical direction, a drawer main body located in the installation cavities, and a circuit breaker is fixedly arranged in the drawer main body; the drawer main body is provided with a locking pin, a transmission shaft located in the drawer main body, and a handle fixed to one end of the transmission shaft and rotatably arranged on the outer side of the drawer main body, and the transmission shaft can rotate around its own axis when the handle is rotated; a linkage part for controlling the locking pin is provided on the outer periphery of the transmission shaft, a locking through hole is provided on the bottom side of the drawer main body, and a locking slot is provided on the bottom side of the installation cavity; an adjusting part for controlling the opening and closing of the circuit breaker is provided on the inner end portion of the transmission shaft; the present application is safer through the mechanical locking structure on the drawer main body compared with the electrical locking structure, thereby improving the safety performance of the drawer cabinet when used.

Description

Technical Field

[0001] The present application relates to the technical field of drawer cabinets, and in particular to a low-voltage drawer cabinet. Background Art

[0002] As an important low-voltage power distribution equipment, low-voltage drawer cabinet plays the role of power conversion, distribution and control in the power system. With its compact structure, diverse functions and flexible operation, it is widely used in various places that require power distribution and control. With the continuous development of power technology, low-voltage drawer cabinets are also constantly upgraded and improved to meet the higher demand for power distribution in different industries.

[0003] In the related art, a low-voltage drawer cabinet includes a cabinet body, on which a plurality of installation cavities are opened in a vertical direction, and a withdrawable drawer body is arranged in the installation cavity, wherein a circuit breaker is installed in the drawer body, and an electrical interlocking structure is usually arranged on the cabinet body to ensure that the internal circuit breaker is in a disconnected state when the drawer body is withdrawn.

[0004] However, in some cases, the electrical interlock structure may introduce new safety hazards. For example, if the electrical interlock structure is improperly designed or installed, it may cause short circuits or leakage between electrical components, causing fires or electric shock accidents. In addition, if there are loopholes or errors in the control logic of the electrical interlock structure, it may also cause the drawer body to be pulled out by mistake when it should not be pulled out, thereby causing safety accidents; there is room for improvement. Summary of the invention

[0005] The purpose of the present application is to provide a low-voltage drawer cabinet to solve the problem of potential safety hazards when the electrical interlocking structure on the above-mentioned low-voltage drawer cabinet is used.

[0006] The low-voltage drawer cabinet provided in this application adopts the following technical solution:

[0007] A low-voltage drawer cabinet comprises a cabinet body, wherein the cabinet body is provided with a plurality of installation cavities in a vertical direction, a drawer body located in the installation cavities, and a circuit breaker is fixedly arranged in the drawer body; the drawer body is provided with a locking pin, a transmission shaft located in the drawer body, and a handle fixed to one end of the transmission shaft and rotatably arranged on the outer side of the drawer body, and the transmission shaft can rotate around its own axis when the handle is rotated; a linkage part for controlling the locking pin is provided on the outer periphery of the transmission shaft, a locking through hole is provided on the bottom side of the drawer body, and a locking slot is provided on the bottom side of the installation cavity; an adjusting part for controlling the opening and closing of the circuit breaker is provided on the inner end portion of the transmission shaft; when the drawer cabinet is in operation, the locking pin passes through the locking through hole and is inserted into the locking slot, and the adjusting part adjusts the circuit breaker to a closed state; when the drawer body needs to be pulled out, the handle is rotated to make the locking pin disengage from the locking slot, and the adjusting part disconnects the circuit breaker.

[0008] By adopting the above technical solution, due to the coordinated arrangement of the locking pin, the linkage member and the adjusting member, when the drawer cabinet is in operation, the locking pin passes through the locking through hole and is inserted into the locking slot, and the adjusting member adjusts the circuit breaker to a closed state, at which time the drawer body cannot be directly pulled out; when the drawer body needs to be pulled out, the handle is turned to disengage the locking pin from the locking slot, the adjusting member disconnects the circuit breaker, and then the drawer body can be pulled out; the mechanical locking structure on the drawer body is safer than the electrical locking structure, thereby improving the safety performance of the drawer cabinet when in use.

[0009] Optionally, the linkage member includes a first linkage rod and a second linkage rod, both ends of the second linkage rod are respectively hinged to the locking pin and one end of the first linkage rod, and the end of the first linkage rod away from the second linkage rod is fixed on the outer periphery of the transmission shaft; the locking pin is slidably arranged on the inner side surface of the drawer body, and when the transmission shaft rotates, the locking pin is driven to slide back and forth in a direction close to the locking through hole through the first linkage rod and the second linkage rod.

[0010] By adopting the above-mentioned technical solution, due to the coordinated arrangement of the first linkage rod and the second linkage rod, when the transmission shaft rotates, the locking pin is driven by the first linkage rod and the second linkage rod to slide back and forth in the direction close to the locking through hole, so that the locking pin can pass through the locking through hole and be inserted into the locking slot, and can also be removed from the locking slot, thereby realizing the control and adjustment of the locking pin.

[0011] Optionally, a positioning block is fixedly provided on the outer surface of the locking pin, and a protective assembly is provided on the drawer body, the protective assembly comprising a locking plate slidably arranged on the bottom side of the drawer body, a connecting rod assembly for driving the locking plate to slide, and a button for controlling the connecting rod assembly; the button can automatically reset after the pressing stops; when the button is pressed, the locking plate can slide to the bottom of the positioning block and abut against the bottom side of the positioning block; when the button is reset under normal circumstances, the locking plate rotates out from under the positioning block.

[0012] By adopting the above technical solution, due to the coordinated arrangement of the positioning block and the protective assembly, when the locking pin is inserted into the locking slot, the positioning block moves downward as a whole, so that the locking plate cannot be rotated to the bottom of the positioning block and cannot limit the locking pin; when the handle and the rotating rod are rotated to pull the locking pin out of the locking slot, the circuit breaker is in a disconnected state at this time, and the button can be pressed to lock the state of the locking pin and the transmission shaft, thereby preventing the operator from rotating the transmission shaft in the opposite direction to reclose the circuit breaker in this state (when the drawer body is pulled out), thereby improving the safety performance when the drawer body is pulled out.

[0013] Optionally, the connecting rod assembly includes a first rotating shaft fixed on the bottom side of the drawer body, a second rotating shaft fixed on the locking plate, and a first connecting rod hinged to the inner side of the button, and the end of the first connecting rod away from the button is hinged to the locking plate through the second rotating shaft; when the button is pressed, the locking plate is driven to rotate around the axis of the first rotating shaft through the first connecting rod; a protrusion that can be rotated to the bottom of the positioning block is fixed on the locking plate.

[0014] By adopting the above technical solution, when the button is pressed, the first connecting rod drives the locking plate to rotate around the axis of the first rotating shaft, and the protrusion on the locking plate can move to the bottom of the positioning block and abut against the bottom side of the positioning block; when the button is reset under normal circumstances, the protrusion on the locking plate is rotated out from under the positioning block.

[0015] Optionally, a third rotating shaft is fixedly provided on the locking plate, and an arc-shaped guide groove for the third rotating shaft to pass through is provided on the bottom side of the drawer body, and the third rotating shaft slides along the length direction of the arc-shaped guide groove; a positioning notch is provided on the opening edge of the bottom side of the installation cavity, and a yield groove is provided on the inner wall of the positioning notch; the third rotating shaft can be inserted into the positioning notch when the locking plate is rotated out from under the positioning block, and the third rotating shaft in the positioning notch can be rotated from the positioning notch to the yield groove when the button is reset.

[0016] By adopting the above technical solution, when the drawer body needs to be pulled out from the installation cavity, only by pressing the button can the third rotating shaft be rotated from the yielding groove to the inside of the positioning notch, thereby doubly locking the drawer body through the third rotating shaft and the locking pin; when the originally pulled out drawer body needs to be inserted into the installation cavity, only by pressing the button can the third rotating shaft be aligned with the opening of the positioning notch; thereby reducing the possibility of unauthorized persons arbitrarily opening and closing the drawer body.

[0017] Optionally, a support plate located on one side of the circuit breaker is fixedly provided inside the drawer body, and a positioning through hole is provided on the support plate for the transmission shaft to pass through, and the adjusting member includes a guide plate slidably arranged on the side of the support plate facing the circuit breaker; a guide notch is provided on the side of the guide plate facing the support plate; an adjusting gear is fixedly provided on the outer periphery of the transmission shaft, and a plurality of adjusting tooth grooves meshing with the adjusting gear are provided on the inner wall of the guide notch; adjusting plates are symmetrically fixedly provided on the side of the guide plate away from the support plate; an adjustment gap is preset between the two adjustment plates for the operating handle on the circuit breaker to be placed therein, and the operating handle can be driven to rotate when the adjustment plate slides.

[0018] By adopting the above technical solution, the control handle, the transmission shaft and the adjusting gear rotate synchronously. When the adjusting gear rotates, the guide plate and the adjusting plate are driven to slide. When the adjusting plate slides, the operating handle on the circuit breaker can be driven to rotate, and then the circuit breaker is adjusted to the disconnected state. Only then can the drawer body be unlocked by pressing the button; thereby, the opening and closing state of the circuit breaker can be controlled, and better control and adjustment of the circuit breaker can be achieved.

[0019] Optionally, a clearance gap is provided on the drawer body, and corresponding heat dissipation holes are provided on two side walls opposite to the clearance gap.

[0020] By adopting the above technical solution, due to the provision of the heat dissipation through holes, when the drawer cabinet is in operation, the internal gas can be discharged to the outside through the heat dissipation through holes, forming an exchange of internal and external gases, thereby improving the heat dissipation performance of the drawer cabinet.

[0021] Optionally, a blocking plate located below the transmission shaft is provided inside the clearance gap, a heat conductive through hole is opened on the blocking plate, a fixing plate and a damping spring are provided below the blocking plate, two ends of the damping spring are respectively fixed to the fixing plate and the damping spring, and the fixing plate is detachably arranged on the bottom side of the clearance gap; an arc-shaped protrusion is fixedly provided on the outer periphery of the transmission shaft; when the handle is rotated to pull out the drawer body, the arc-shaped protrusion is pressed against the side surface of the blocking plate, and the heat conductive through hole and the heat dissipation through hole are misaligned; when the handle is reset and the drawer body is in a locked state, when the outer periphery of the transmission shaft is pressed against the side surface of the blocking plate, the heat conductive through hole and the heat dissipation through hole coincide with each other.

[0022] By adopting the above technical solution, when the handle is rotated to pull out the drawer body, the arc-shaped protrusion is pressed against the side surface of the blocking plate, squeezing the damping spring to move the blocking plate toward the fixed plate, and the thermal conductive through-hole and the heat dissipation through-hole are misaligned, and the gas inside and outside cannot be connected at this time; when the handle is reset and the drawer cabinet is in operation, the outer periphery of the transmission shaft is pressed against the side surface of the blocking plate, and the damping spring drives the blocking plate to reset, and the thermal conductive through-hole and the heat dissipation through-hole coincide with each other, and the gas inside and outside is connected through the thermal conductive through-hole and the heat dissipation through-hole, and good heat dissipation performance is achieved at this time.

[0023] Optionally, an elastic clamping piece is provided on the outer side surface of the fixing plate, and a positioning groove for inserting the elastic clamping piece is provided on the inner wall of the clearance gap.

[0024] By adopting the above technical solution, when the fixing plate and the blocking plate are placed in the clearance gap, the bottom side of the fixing plate abuts against the clearance gap, and the elastic clip on the side of the fixing plate is inserted into the corresponding positioning groove, thereby improving its assembly stability.

[0025] Optionally, the fixing plate can be detachably arranged on the side wall of the drawer body, a positioning card plate is rotatably arranged on the blocking plate, a guiding through groove for the positioning card plate to be inserted and slide is provided on the inner wall of the drawer body, and a guiding groove for the positioning card plate to be inserted and slide is provided on the opening side wall of the installation cavity; when the positioning card plate is pressed against the side wall of the guiding groove, the damping spring is in a compressed state.

[0026] By adopting the above technical solution, the fixing plate can be fixed on the inner wall of the drawer body, so that the positioning card plate can be inserted into the guide groove after passing through the guide groove; when the drawer body is inside the installation cavity and the drawer cabinet is in operation, the damping spring is in a compressed state when the positioning card plate is pressed against the side wall of the guide groove, that is, it plays a buffering and shock absorbing role during the pushing and pulling process of the drawer body, reducing the possibility of damage to the electrical components in the drawer body due to excessive vibration when closing.

[0027] In summary, the present application includes at least one of the following beneficial technical effects:

[0028] 1. Due to the coordinated arrangement of the locking pin, the linkage part and the adjusting part, when the drawer cabinet is in operation, the locking pin passes through the locking through hole and is inserted into the locking slot, and the adjusting part adjusts the circuit breaker to a closed state, at which time the drawer body cannot be directly pulled out; when the drawer body needs to be pulled out, the handle is turned to disengage the locking pin from the locking slot, the adjusting part disconnects the circuit breaker, and then the drawer body can be pulled out; the mechanical locking structure on the drawer body is safer than the electrical locking structure, thereby improving the safety performance of the drawer cabinet during application. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0030] Figure 1 It is a schematic diagram of the overall structure of Example 1 of the present application;

[0031] Figure 2 It is a cross-sectional structural diagram of the installation and matching of the drawer body in Embodiment 1 of the present application;

[0032] Figure 3 It is a partial cross-sectional structural schematic diagram of the installation and matching of the handle and the rotating shaft in Example 1 of the present application;

[0033] Figure 4 It is a partial cross-sectional structural schematic diagram of the embodiment 1 of the present application embodying the installation and coordination of the linkage parts;

[0034] Figure 5 is a partial cross-sectional structural schematic diagram of the button being pressed in Example 1 of the present application;

[0035] Figure 6 This is a schematic diagram of the structure of the distribution of positioning notches and clearance sinks in Example 1 of the present application;

[0036] Figure 7 This is a schematic diagram of the structure of the distribution of heat dissipation through holes in Example 2 of the present application;

[0037] Figure 8 This is a schematic diagram of the structure of the second embodiment of the present application, which embodies the installation and coordination of the baffle plate, the damping spring and the fixing plate;

[0038] Fig. 9 It is a partial cross-sectional structural schematic diagram of the distribution of the clearance gaps in Example 2 of the present application;

[0039] Fig.10 It is a partial cross-sectional structural schematic diagram of the installation and coordination of the baffle plate in Example 2 of the present application;

[0040] Fig.11 It is a partial cross-sectional structural schematic diagram of the embodiment 2 of the present application showing the installation and cooperation between the arc-shaped protrusion and the transmission shaft;

[0041] Fig.12 yes Fig.11 A magnified schematic diagram of part A;

[0042] Fig.13 This is a schematic diagram of the structure of the second embodiment of the present application, which embodies the installation and coordination of the blocking plate and the positioning card plate;

[0043] Fig.14 This is a partial cross-sectional structural schematic diagram of Example 2 of the present application when the blocking plate is arranged on the inner side wall of the drawer body;

[0044] Fig.15 It is a structural schematic diagram of the distribution of guide through grooves and guide sink grooves embodied in Example 2 of the present application.

[0045] In the figure, 1, cabinet; 11, installation cavity; 111, locking slot; 112, positioning notch; 113, yielding groove; 114, guiding groove; 12, circuit breaker; 121, operating handle; 2, drawer body; 21, locking through hole; 22, arc-shaped guide through groove; 23, support plate; 231, positioning through hole; 24, yielding gap; 241, positioning groove; 25, heat dissipation through hole; 26, guiding through groove; 3, locking assembly; 31, locking pin; 311, positioning block; 32, transmission shaft; 321, adjusting gear; 322, arc-shaped protrusion; 33, handle; 34, linkage member; 341, first linkage rod; 3 42. Second linkage rod; 35. Adjusting member; 351. Guide plate; 3511. Guide notch; 3512. Adjusting tooth groove; 352. Adjusting plate; 3521. Adjusting gap; 4. Protective assembly; 41. Locking plate; 411. Protrusion; 42. Link assembly; 421. First rotating shaft; 422. Second rotating shaft; 423. Third rotating shaft; 424. First connecting rod; 43. Button; 5. Blocking plate; 51. Accommodating cavity; 52. Thermal through hole; 53. Water-absorbing cotton; 54. Positioning card plate; 6. Damping spring; 7. Fixing plate; 71. Placement groove; 8. Elastic clamping member; 81. Compression spring; 82. Arc-shaped card block. DETAILED DESCRIPTION

[0046] The present application is further described in detail below in conjunction with all the accompanying drawings.

[0047] Embodiment 1:

[0048] Reference Figure 1 and Figure 2 A low-voltage drawer cabinet comprises a cabinet body 1, a plurality of installation cavities 11 are arranged on the cabinet body 1 in the vertical direction, a drawer body 2 is located in the installation cavity 11, and a circuit breaker 12 is fixedly installed inside the drawer body 2, and an operating handle 121 for controlling the on-off of the circuit breaker 12 is rotatably arranged on the outer shell of the circuit breaker 12.

[0049] Reference Figure 3 and Figure 4 The drawer body 2 is provided with a locking assembly 3, wherein the locking assembly 3 includes a locking pin 31, a transmission shaft 32 located in the drawer body 2, and a handle 33 fixed to one end of the transmission shaft 32 and rotatably arranged on the outer side of the drawer body 2, wherein the transmission shaft 32 can rotate around its own axis when the handle 33 is rotated; a linkage member 34 for controlling the locking pin 31 is provided on the outer periphery of the transmission shaft 32, a locking through hole 21 is provided on the bottom side of the drawer body 2, wherein a locking slot 111 is provided on the bottom side of the mounting cavity 11; an adjusting member 35 for controlling the opening and closing of the circuit breaker 12 is provided on the inner end portion of the transmission shaft 32;

[0050] When the drawer cabinet is in operation, the locking pin 31 passes through the locking through hole 21 and is inserted into the locking slot 111, and the adjusting member 35 adjusts the circuit breaker 12 to a closed state, at which time the drawer body 2 cannot be directly pulled out; when the drawer body 2 needs to be pulled out, the handle 33 is rotated to disengage the locking pin 31 from the locking slot 111, and the adjusting member 35 disconnects the circuit breaker 12, and then the drawer body 2 can be pulled out.

[0051] Reference Figure 3 and Figure 4 The linkage member 34 includes a first linkage rod 341 and a second linkage rod 342, wherein both ends of the second linkage rod 342 are respectively hinged to the locking pin 31 and one end of the first linkage rod 341, and the end of the first linkage rod 341 away from the second linkage rod 342 is fixed on the outer periphery of the transmission shaft 32;

[0052] The locking pin 31 is slidably arranged on the inner side surface of the drawer body 2. When the transmission shaft 32 rotates, the first link rod 341 and the second link rod 342 drive the locking pin 31 to slide back and forth in the direction close to the locking through hole 21, so that the locking pin 31 can pass through the locking through hole 21 and be inserted into the locking slot 111.

[0053] Reference Figure 4 and Figure 5 A positioning block 311 is fixedly arranged on the outer surface of the locking pin 31, and a protection assembly 4 is arranged on the drawer body 2, wherein the protection assembly 4 includes a locking plate 41 slidably arranged on the bottom side of the drawer body 2, a connecting rod assembly 42 for driving the locking plate 41 to slide, and a button 43 for controlling the connecting rod assembly 42. A spring is arranged inside the button 43, and it can automatically reset after stopping pressing, which will not be described in detail here;

[0054] The connecting rod assembly 42 includes a first rotating shaft 421 fixed to the bottom side of the drawer body 2, a second rotating shaft 422 fixed to the locking plate 41, and a first connecting rod 424 hinged to the inner side of the button 43, wherein the end of the first connecting rod 424 away from the button 43 is hinged to the locking plate 41 through the second rotating shaft 422, and the locking plate 41 is integrally formed with a protrusion 411 that can be rotated to the bottom of the positioning block 311.

[0055] When the button 43 is pressed, the locking plate 41 is driven to rotate around the axis of the first rotating shaft 421 through the first connecting rod 424, and the protrusion 411 on the locking plate 41 can move to the bottom of the positioning block 311 and abut against the bottom side of the positioning block 311; when the button 43 is reset under normal circumstances, the protrusion 411 on the locking plate 41 is rotated out from under the positioning block 311.

[0056] Reference Figure 5 and Figure 6A third rotating shaft 423 is fixedly disposed on the locking plate 41, wherein an arc-shaped guide slot 22 is provided at the bottom side of the drawer body 2 for the third rotating shaft 423 to pass through, and the third rotating shaft 423 slides along the length direction of the arc-shaped guide slot 22 when the locking plate 41 rotates;

[0057] A positioning notch 112 is provided on the bottom opening edge of the installation cavity 11, and a clearance groove 113 is provided on the inner wall of the positioning notch 112; the third rotating shaft 423 can be inserted into the positioning notch 112 when the locking plate 41 is rotated out from under the positioning block 311, and the third rotating shaft 423 in the positioning notch 112 can be rotated from the positioning notch 112 to the clearance groove 113 when the button 43 is reset;

[0058] When the originally pulled-out drawer body 2 needs to be inserted into the installation cavity 11, the third rotating shaft 423 can be aligned with the opening of the positioning notch 112 only by pressing the button 43; when the drawer body 2 needs to be pulled out from the installation cavity 11, the third rotating shaft 423 can be rotated from the yielding groove 113 to the inside of the positioning notch 112 only by pressing the button 43.

[0059] Reference Figure 3 and Figure 5 A support plate 23 located on one side of the circuit breaker 12 is fixedly disposed inside the drawer body 2, wherein a positioning through hole 231 for the transmission shaft 32 to pass through is formed on the support plate 23, and the adjustment member 35 comprises a guide plate 351 slidably disposed on the side of the support plate 23 facing the circuit breaker 12, and a guide notch 3511 is formed on the side of the guide plate 351 facing the support plate 23;

[0060] An adjusting gear 321 is fixedly provided on the outer periphery of the transmission shaft 32, wherein a plurality of adjusting tooth grooves 3512 meshing with the adjusting gear 321 are provided on the inner wall of the guide notch 3511; adjusting plates 352 are symmetrically fixedly provided on the side of the guide plate 351 away from the support plate 23; an adjusting gap 3521 is preset between the two adjusting plates 352 for the operating handle 121 on the circuit breaker 12 to be placed, and the sliding direction of the adjusting plate 352 is parallel to the rotating surface of the operating handle 121, and the operating handle 121 can be driven to rotate when the adjusting plate 352 slides.

[0061] The implementation principle of the embodiment of the present application is:

[0062] When the drawer cabinet is in operation, the locking pin 31 passes through the locking through hole 21 and is inserted into the locking slot 111, and the adjusting member 35 adjusts the circuit breaker 12 to a closed state, at which time the drawer body 2 cannot be directly withdrawn;

[0063] When the drawer body 2 needs to be pulled out from the installation cavity 11:

[0064] First, the control handle 33, the transmission shaft 32 and the adjusting gear 321 rotate synchronously, and the locking pin 31 is driven to disengage from the locking slot 111 through the first linkage rod 341 and the second linkage rod 342; when the adjusting gear 321 rotates, the guide plate 351 and the adjusting plate 352 are driven to slide, and when the adjusting plate 352 slides, the operating handle 121 on the circuit breaker 12 can be driven to rotate, thereby adjusting the circuit breaker 12 to the disconnected state;

[0065] Second, when the button 43 is pressed, the first connecting rod 424 drives the locking plate 41 to rotate around the axis of the first rotating shaft 421, so that the protruding portion 411 on the locking plate 41 rotates out from under the positioning block 311, and the locking pin 31 is released from the current state to lock; at the same time, the third rotating shaft 423 in the positioning notch 112 can rotate from the yielding groove 113 to the positioning notch 112 when the button 43 is reset;

[0066] Third, the drawer body 2 is pulled out from the installation cavity 11, and the button 43 is kept pressed so that the third shaft 423 slides out along the length direction of the positioning notch 112; then the button 43 is stopped from being pressed, so that the button 43, the locking plate 41 and the third shaft 423 are reset;

[0067] Fourth, when the drawer body 2 is pulled out, the protrusion 411 on the locking plate 41 locks the locking pin 31, that is, the transmission shaft 32 cannot rotate, and the circuit breaker 12 in the disconnected state cannot be closed;

[0068] Fifth, when the drawer body 2 needs to be moved back into the installation cavity 11, first press the button 43 to unlock the transmission shaft 32, and at the same time align the third rotating shaft 423 with the opening of the positioning notch 112; then push the drawer body 2 into the installation cavity 11, and then stop pressing the button 43, so that the third rotating shaft 423 in the positioning notch 112 can be rotated from the positioning notch 112 to the clearance groove 113 when the button 43 is reset, and finally rotate the handle 33 in the opposite direction, insert the locking pin 31 into the locking slot 111, and adjust the circuit breaker 12 to the closed state.

[0069] Embodiment 2:

[0070] Reference Figure 7 , Figure 8 and Fig. 9 The difference between the embodiment of the present application and the embodiment 1 is that a clearance gap 24 is provided on the drawer body 2, and corresponding heat dissipation holes 25 are provided on the two side walls opposite to the clearance gap 24;

[0071] A blocking plate 5 located below the transmission shaft 32 is provided inside the clearance gap 24, wherein a heat conductive through hole 52 is opened on the blocking plate 5, and a fixing plate 7 and three damping springs 6 are provided below the blocking plate 5, wherein both ends of the damping spring 6 are fixedly connected to the fixing plate 7 and the damping spring 6 respectively, and the fixing plate 7 is detachably arranged on the bottom side of the clearance gap 24; the size of the blocking plate 5, the distribution of the heat dissipation through holes 25, and the distribution of the heat conductive through holes 52 can all be appropriately adjusted.

[0072] Reference Fig. 9 and Fig.10 , an arc-shaped protrusion 322 is fixed on the outer periphery of the transmission shaft 32; when the handle 33 is rotated to pull out the drawer body 2, the arc-shaped protrusion 322 is pressed against the upper side of the blocking plate 5, squeezing the damping spring 6, so that the blocking plate 5 moves toward the fixed plate 7, and the heat conduction through hole 52 and the heat dissipation through hole 25 are misaligned, and the gas inside and outside cannot communicate;

[0073] When the handle 33 is reset and the drawer cabinet is in operation, the outer periphery of the transmission shaft 32 is pressed against the upper side of the baffle plate 5, and the damping spring 6 drives the baffle plate 5 to reset. At this time, the thermal conductive through hole 52 coincides with the heat dissipation through hole 25, and the gas inside and outside is connected through the thermal conductive through hole 52 and the heat dissipation through hole 25.

[0074] Reference Figure 8 and Fig. 9 A receiving cavity 51 is provided on the side of the baffle plate 5 , and absorbent cotton 53 is placed in the receiving cavity 51 to absorb water vapor that may enter the drawer body 2 from the heat conducting through hole 52 and the heat dissipating through hole 25 .

[0075] Reference Fig.11 and Fig.12 An elastic clamping member 8 is provided on the outer side of the fixing plate 7, wherein the elastic clamping member 8 includes a compression spring 81 and an arc-shaped clamping block 82. A placement groove 71 for the compression spring 81 and the arc-shaped clamping block 82 is provided on the outer side of the fixing plate 7. The compression spring 81 squeezes the arc-shaped clamping block 82 so that a part of the arc-shaped clamping block 82 protrudes out of the placement groove 71, and the protruding portion 411 of the arc-shaped clamping block 82 is divided into an arc surface, and the arc length corresponding to the arc surface is a minor arc. At the same time, a positioning groove 241 for the elastic clamping member 8 to be inserted is provided on the inner wall of the clearance gap 24, so as to realize the detachable fixation of the fixing plate 7 and the inner wall of the clearance gap 24.

[0076] Reference Fig.13 , Fig.14 and Fig.15, two positioning card plates 54 are rotatably arranged on the blocking plate 5, and a receiving groove for the positioning card plates 54 to rotate into is opened on the blocking plate 5; the fixing plate 7 can be detachably arranged on the side wall of the drawer body 2 by screws, wherein a guide through groove 26 for the positioning card plates 54 to be inserted and slid is opened on the inner wall of the drawer body 2, and a guide sink groove 114 for the positioning card plates 54 to be inserted and slid is opened on the opening side wall of the installation cavity 11;

[0077] When the drawer body 2 is inside the installation cavity 11 and the drawer cabinet is in operation, the damping spring 6 is in a compressed state when the positioning card plate 54 is pressed against the side wall of the guide groove 114, that is, it plays a guiding and buffering role during the pushing and pulling process of the drawer body 2.

[0078] Unless otherwise defined, the terms or scientific terms used in this application should be understood by people with ordinary skills in the field to which this application belongs. The "first", "second", "third" and similar words used in this application do not indicate any order, quantity or importance, but are only used to distinguish different components. "One" or "one" and other similar words do not indicate a quantitative limit, but indicate that there is at least one. "Including" or "comprising" and other similar words mean that the elements or objects appearing in front of "including" or "comprising" cover the elements or objects listed after "including" or "comprising" and their equivalents, and do not exclude other elements or objects. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0079] The embodiments of this specific implementation are all preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. The same components are represented by the same figure marks. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A low-voltage drawer cabinet, comprising a cabinet body (1), wherein the cabinet body (1) is provided with a plurality of installation cavities (11) in a vertical direction, and a drawer body (2) located in the installation cavities (11), wherein a circuit breaker (12) is fixedly provided in the drawer body (2); characterized in that: The drawer body (2) is provided with a locking pin (31), a transmission shaft (32) located inside the drawer body (2), and a handle (33) fixed to one end of the transmission shaft (32) and rotatably arranged on the outer side of the drawer body (2); the transmission shaft (32) can rotate around its own axis when the handle (33) rotates; A linkage member (34) for controlling the locking pin (31) is provided on the outer periphery of the transmission shaft (32); a locking through hole (21) is provided on the bottom side of the drawer body (2); and a locking slot (111) is provided on the bottom side of the installation cavity (11); an adjusting member (35) for controlling the opening and closing of the circuit breaker (12) is provided on the inner end of the transmission shaft (32); when the drawer cabinet is in operation, the locking pin (31) passes through the locking through hole (21) and is inserted into the locking slot (111), and the adjusting member (35) adjusts the circuit breaker (12) to a closed state; when the drawer body (2) needs to be drawn out, the handle (33) is rotated to make the locking pin (31) disengage from the locking slot (111), and the adjusting member (35) disconnects the circuit breaker (12); A positioning block (311) is fixedly arranged on the outer side of the locking pin (31), and a protection assembly (4) is arranged on the drawer body (2), wherein the protection assembly (4) comprises a locking plate (41) slidably arranged on the inner bottom side of the drawer body (2), a connecting rod assembly (42) for driving the locking plate (41) to slide, and a button (43) for controlling the connecting rod assembly (42); The button (43) can automatically reset after the button (43) stops being pressed; when the button (43) is pressed, the locking plate (41) can slide to the bottom of the positioning block (311) and abut against the bottom side of the positioning block (311); when the button (43) is reset under normal conditions, the locking plate (41) rotates out from under the positioning block (311); the connecting rod assembly (42) comprises a first rotating shaft (421) fixedly arranged on the bottom side of the drawer body (2), a second rotating shaft (422) fixedly arranged on the locking plate (41), and a first connecting rod (424) hingedly connected to the inner side of the button (43); an end of the first connecting rod (424) away from the button (43) is hingedly connected to the locking plate (41) via the second rotating shaft (422); When the button (43) is pressed, the locking plate (41) is driven to rotate around the axis of the first rotating shaft (421) through the first connecting rod (424); a protrusion (411) capable of rotating to the bottom of the positioning block (311) is fixedly provided on the locking plate (41); a third rotating shaft (423) is fixedly provided on the locking plate (41); an arc-shaped guide groove (22) for the third rotating shaft (423) to pass through is provided on the bottom side of the drawer body (2); and the third rotating shaft (423) slides along the length direction of the arc-shaped guide groove (22); A positioning notch (112) is provided on the bottom opening edge of the installation cavity (11), and a clearance groove (113) is provided on the inner wall of the positioning notch (112); the third rotating shaft (423) can be inserted into the positioning notch (112) when the locking plate (41) is rotated out from under the positioning block (311), and the third rotating shaft (423) in the positioning notch (112) can be rotated from the positioning notch (112) to the clearance groove (113) when the button (43) is reset.

2. A low voltage drawer cabinet according to claim 1, characterized in that: The linkage member (34) comprises a first linkage rod (341) and a second linkage rod (342), the two ends of the second linkage rod (342) being hinged to the locking pin (31) and one end of the first linkage rod (341) respectively, and the end of the first linkage rod (341) away from the second linkage rod (342) is fixedly arranged on the outer periphery of the transmission shaft (32); The locking pin (31) is slidably arranged on the inner side surface of the drawer body (2); when the transmission shaft (32) rotates, the locking pin (31) is driven to slide back and forth in a direction close to the locking through hole (21) through the first linkage rod (341) and the second linkage rod (342).

3. A low voltage drawer cabinet according to claim 1, characterized in that: A support plate (23) located on one side of the circuit breaker (12) is fixedly provided inside the drawer body (2), a positioning through hole (231) for the transmission shaft (32) to pass through is opened on the support plate (23), and the adjustment member (35) comprises a guide plate (351) slidably arranged on the side of the support plate (23) facing the circuit breaker (12); A guide notch (3511) is provided on the side of the guide plate (351) facing the support plate (23); an adjustment gear (321) is fixedly provided on the outer periphery of the transmission shaft (32); a plurality of adjustment tooth grooves (3512) meshing with the adjustment gear (321) are provided on the inner wall of the guide notch (3511); adjustment plates (352) are symmetrically fixedly provided on the side of the guide plate (351) away from the support plate (23); an adjustment gap (3521) is preset between the two adjustment plates (352) for the operating handle (121) on the circuit breaker (12) to be placed therein, and the adjustment plate (352) can drive the operating handle (121) to rotate when sliding.

4. A low voltage drawer cabinet according to claim 1, characterized in that: The drawer body (2) is provided with a clearance gap (24), and corresponding heat dissipation through holes (25) are provided on two opposite side walls of the clearance gap (24).

5. A low voltage drawer cabinet according to claim 4, characterized in that: A baffle plate (5) located below the transmission shaft (32) is provided inside the clearance gap (24); a heat-conducting through hole (52) is provided on the baffle plate (5); a fixing plate (7) and a damping spring (6) are provided below the baffle plate (5); two ends of the damping spring (6) are respectively fixed to the fixing plate (7) and the damping spring (6); the fixing plate (7) is detachably arranged on the bottom side of the clearance gap (24); an arc-shaped protrusion (322) is fixedly provided on the outer periphery of the transmission shaft (32); When the handle (33) is rotated to draw out the drawer body (2), the arc-shaped protrusion (322) is pressed against the upper side of the blocking plate (5), and the heat-conducting through hole (52) and the heat-dissipating through hole (25) are misaligned; when the handle (33) is reset and the drawer body (2) is in a locked state, the outer periphery of the transmission shaft (32) is pressed against the upper side of the blocking plate (5), and the heat-conducting through hole (52) and the heat-dissipating through hole (25) overlap.

6. A low voltage drawer cabinet according to claim 5, characterized in that: An elastic clamping piece (8) is provided on the outer side surface of the fixing plate (7), and a positioning groove (241) for inserting the elastic clamping piece (8) is provided on the inner wall of the clearance gap (24).

7. A low voltage drawer cabinet according to claim 5, characterized in that: The fixing plate (7) can be detachably arranged on the side wall of the drawer body (2); a positioning card plate (54) is rotatably arranged on the blocking plate (5); a guiding groove (26) for the positioning card plate (54) to be inserted and slid is provided on the inner wall of the drawer body (2); a guiding groove (114) for the positioning card plate (54) to be inserted and slid is provided on the opening side wall of the installation cavity (11); when the positioning card plate (54) is pressed against the side wall of the guiding groove (114), the damping spring (6) is in a compressed state.

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