A power distribution cabinet drawer unit
By using an adjustable connection method with conductive clamps and conductive strips, combined with the application of a paste brush, the problems of wear and heat generation during hot-swapping of the distribution cabinet drawer unit are solved, improving the service life and conductivity of the connectors and ensuring safety.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-03-20
- Publication Date
- 2026-06-26
AI Technical Summary
In traditional power distribution cabinet drawer units, the connectors are prone to wear during long-term hot-swapping, leading to increased contact resistance, severe heat generation, increased energy consumption, and safety hazards.
The conductive clamps and conductive strips are used for adjustable connection. By using the sliding adjustment plate and the plug rod, friction between the conductive clamps and conductive strips and the inlet cable is avoided. The opening and closing action of the conductive clamps and conductive strips, combined with the use of a paste brush, maintains conductivity.
It effectively reduces wear on connectors, lowers contact resistance and heat generation, improves connector lifespan and conductivity, and ensures safety.
Smart Images
Figure CN122292195A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of power distribution cabinet technology, and more specifically, to a power distribution cabinet drawer unit. Background Technology
[0002] Traditional fixed distribution cabinets require the power to be cut off entirely during maintenance or malfunctions, leading to widespread production stoppages and significant economic losses. With economic and technological advancements, drawer-type distribution cabinets have emerged. A distribution cabinet drawer unit is a modular electrical component that houses all primary and secondary components, such as circuit breakers, contactors, transformers, and protective devices, in a fully removable, independent drawer. Functionally, each drawer unit is equivalent to a small, complete power distribution or motor control center. When pushed into the cabinet's "drawer seat," the components inside automatically connect to the main circuitry of the distribution cabinet.
[0003] The advantage of using drawer-type distribution cabinets lies in their ability to achieve uninterrupted and rapid maintenance through modular "hot-swappable" operation, which greatly improves power supply continuity, safety, and maintenance efficiency, meeting the stringent requirements of modern industry for high reliability.
[0004] However, each drawer unit is electrically connected to the cabinet via a connector at the rear. During frequent plugging and unplugging, these connectors are prone to wear and tear, even producing metal powder. This can lead to overheating, increased contact resistance, and even short circuits. Under high current conditions, this results in additional energy loss and may become a potential long-term malfunction. Therefore, it is necessary to propose a new type of drawer unit for the distribution cabinet to address these issues. Summary of the Invention
[0005] To address the problems existing in the prior art, the present invention aims to provide a power distribution cabinet drawer unit that can solve the problems of wear and dirt accumulation on the connectors of traditional drawer units during long-term hot-swapping, leading to increased contact resistance, severe overheating, and increased energy consumption. It has the advantages of reducing wear on the connector contacts, lowering contact resistance and overheating, and improving the service life of the connectors.
[0006] To solve the above problems, the present invention adopts the following technical solution: A power distribution cabinet drawer unit includes a drawer, with two sets of primary moving contact plugs installed at the rear of the drawer. Each primary moving contact plug has a slidable adjustment plate at its bottom. Two toggle posts are symmetrically slidably installed on the top surface of the adjustment plate. A connecting frame is installed on the side of one of the adjustment plates. The connecting frame slides inside the primary moving contact plug. A vertical rod is fixed to the top of the connecting frame and slides inside the rear of the drawer. Two rotating shafts are symmetrically installed inside each of the primary moving contact plugs. Each rotating shaft is rotatably connected to a conductive clamp at both its upper and lower ends. An adjustment groove is provided on the conductive clamp, and the pin slides in the corresponding adjustment groove. Preferably, each of the primary moving contact plugs has two rotating shafts symmetrically installed in the upper and lower positions, and each rotating shaft is rotatably connected to a conductive clamp.
[0007] A second panel is installed above the rear of the drawer. Several secondary moving contact plugs are installed at equal intervals on the outer side of the second panel. Each secondary moving contact plug has a through groove inside. A pair of conductive strips are symmetrically rotatably connected in the through groove. The tail end of the conductive strip has a hollow groove. The second panel has an adjustment frame that slides inside. Each end of the adjustment frame slides inside a plurality of the secondary moving contact plugs. Each end of the adjustment frame is fixed with a pressure plate. Both ends of each pressure plate slide in the corresponding slot.
[0008] In a preferred embodiment of the present invention, a circuit breaker and a control lever are installed inside the drawer. The control lever is rotatably connected to the circuit breaker. Both ends of the control lever pass through the front end of the drawer and the circuit breaker, respectively. A knob is installed at one end of the control lever. A first bracket is fixed inside the drawer. A sleeve rod slides horizontally inside the first bracket. The tail end of the control lever is rotatably connected to the inside of the sleeve rod. A first rotary groove is formed through the surface of the sleeve rod. A first protrusion is fixed at the tail end of the control lever, and the first protrusion slides inside the first rotary groove.
[0009] In a preferred embodiment of the present invention, a second bracket is fixed inside the rear of the drawer. A slide rod and a first spring are installed inside the second bracket. The slide rod is elastically connected to the interior of the second bracket via the first spring. A crossbar is vertically fixed to the rear end of the slide rod. Several insert rods are equidistantly fixed to the side of the crossbar. The rear end of each insert rod slides through a corresponding adjusting plate. Two wing teeth and two first torsion springs are symmetrically installed inside each insert rod. Each wing tooth is elastically connected to both sides of the insert rod via a corresponding first torsion spring. A top rod and a second spring are installed inside the rear end of the insert rod. The top rod is elastically connected to the interior of the insert rod via the second spring, and one end of the top rod protrudes from the rear end of the insert rod. A wing plate is symmetrically fixed to the other end of the top rod, and the wing plate abuts against the corresponding wing tooth.
[0010] As a preferred embodiment of the present invention, a pair of first panels are symmetrically installed at the rear of the drawer. Each first panel is fixed with a plurality of primary moving contact plugs, and a plurality of the plug rods slide inside the corresponding first panel and primary moving contact plugs. Each primary moving contact plug has an inner hollow groove. A third spring is installed inside the primary moving contact plug, and the adjusting plate is elastically connected to the inside of the primary moving contact plug through the third spring.
[0011] In a preferred embodiment of the present invention, a first rotating rod is installed inside the primary moving contact plug between the upper and lower conductive clamps. A first bevel gear is fixed to one end of the first rotating rod, and a rotating plate is fixed to the other end of the first rotating rod. A brush is installed at one end of the rotating plate, and a paste brush is installed at the other end of the rotating plate.
[0012] In a preferred embodiment of the present invention, a second rotating rod is further installed inside the primary moving contact plug between the upper and lower conductive clamps. A second bevel gear is installed at one end of the second rotating rod, and the second bevel gear meshes with the first bevel gear. A second protruding post is fixed at the other end of the second rotating rod. A T-shaped post slides inside the primary moving contact plug, corresponding to the side of the conductive clamp abutting against both ends of the T-shaped post. The other end of the second rotating rod is rotatably connected to the middle of the T-shaped post. A second swivel groove is opened in the middle of the T-shaped post, and the second protruding post slides in the second swivel groove. A pump cylinder and a storage compartment are also installed inside the primary moving contact plug between the upper and lower conductive clamps. A piston slides inside the pump cylinder, and a connecting rod is fixedly connected between the piston and the T-shaped post. The storage compartment and the pump cylinder are interconnected through a conduit, and the pump cylinder and the rotating plate are interconnected through another conduit.
[0013] In a preferred embodiment of the present invention, each of the conductive strips is provided with a fulcrum, the fulcrum is installed inside the secondary moving contact plug, a third torsion spring is sleeved inside the fulcrum, and the conductive strip is elastically connected to the fulcrum through the third torsion spring.
[0014] As a preferred embodiment of the present invention, the two ends of the pressure plate are T-shaped structures, and the two ends of the pressure plate abut against the surface of the conductive strip.
[0015] Compared with the prior art, the advantages of this invention are: 1. By installing a sliding adjustment plate inside the bottom surface of the primary moving contact plug, during the insertion of the primary moving contact plug into the distribution cabinet socket, the socket pushes the adjustment plate in the opposite direction, thereby using the cooperation of the lever and the adjustment groove to gradually tighten the conductive clamp from the open state to the incoming line. At the same time, the sliding of the adjustment plate also drives the adjustment frame and pressure plate to slide, thereby driving the conductive strip to rotate around the fulcrum. The conductive end of the conductive strip protrudes from the secondary moving contact plug and abuts against the incoming line, thus completing the circuit connection between the drawer unit and the distribution cabinet. The connection method of conductive clamp and conductive strip adjustment can effectively avoid friction between the conductive clamp / strip and the incoming line during the relative sliding of the primary and secondary moving contact plugs into the socket, which generates metal debris and causes wear. This leads to increased resistance between the conductive clamp / strip and the incoming line, severe overheating of the conductive clamp / strip, decreased conductivity, and potential safety accidents, effectively improving the service life and conductivity of the conductive clamp / strip.
[0016] 2. An adjustable sleeve and a plug rod that cooperate with the adjustment plate are installed at the tail of the control lever. By rotating the control lever during the circuit breaker switching process, the sleeve is driven to extend or retract, thereby pushing the slide rod and crossbar to control the plug rod to slide inside the primary moving contact plug. The elastically rotating wing teeth also abut against the adjustment plate, and in conjunction with the plug rod, can drive the adjustment plate to slide in one direction. Therefore, before pulling out the drawer, by rotating the control lever when the circuit breaker is disconnected, the adjustment plate is driven to slide, which in turn drives the conductive clamp to open and the conductive strip to retract into the secondary moving contact plug. In this way, the conductive clamp and conductive strip no longer abut against the inlet cable tray, and when the drawer is pulled out, there is no friction between the conductive clamp and conductive strip and the inlet cable tray, further improving the service life and conductivity of the connector.
[0017] 3. When the conductive clamp is about to complete its opening action, the second rotating rod can be driven to rotate by pushing the T-shaped column to slide. This, in turn, drives the first rotating rod to rotate through the meshing of the second bevel gear and the rotating plate, and finally drives the rotating plate to rotate. The brushes and paste brushes at both ends of the rotating plate are used to brush the contact surface of the conductive clamp and apply conductive paste, thus completing the maintenance of the conductive clamp and further improving its service life and conductivity. Attached Figure Description
[0018] Figure 1 This is a schematic diagram of the overall front structure of the present invention; Figure 2 This is a schematic diagram of the overall tail structure of the present invention; Figure 3 This is a schematic diagram of the internal structure of the first support of the present invention; Figure 4 This is a schematic diagram of the internal structure of the second bracket and the relationship between the crossbar and the insertion rod of the present invention; Figure 5This is a schematic diagram showing the relationship between the primary moving contact plug and the secondary moving contact plug of the present invention; Figure 6 This is a cross-sectional view of the primary moving contact plug and the secondary moving contact plug of the present invention; Figure 7 For the present invention Figure 6 Enlarged structural diagram at point A in the middle; Figure 8 This is a schematic diagram of the connection structure between the insertion rod, the adjusting plate, and the conductive clamping block of the present invention. Figure 9 This is a schematic diagram of the internal cross-sectional structure of the insertion rod of the present invention; Figure 10 This is a schematic diagram of the cross-sectional planar structure of the primary moving contact plug of the present invention; Figure 11 This is a schematic diagram illustrating the principle structure of the present invention for driving the rotating plate to rotate and applying conductive paste. Figure 12 This is a schematic diagram of the rotating plate sweeping across the contact surface of the conductive clamping block according to the present invention; Figure 13 This is a schematic diagram of the cross-sectional planar structure of the secondary moving contact plug of the present invention; Figure 14 This is a schematic diagram of the pressure plate driving conductive strip opening and closing structure of the present invention.
[0019] Explanation of the labels in the diagram: 11. Drawer; 12. Circuit breaker; 13. Control lever; 14. Knob; 15. First bracket; 16. Sleeve rod; 17. First rotary groove; 18. First protruding post; 21. Second bracket; 22. Slide rod; 23. First spring; 24. Crossbar; 25. Insert rod; 26. Wing tooth; 27. First torsion spring; 28. Top rod; 29. Second spring; 291. Wing plate; 31. First insert plate; 32. Primary moving contact plug; 33. Inner cavity; 34. Adjusting plate; 35. Third spring; 36. Toggle post; 37. Connecting bracket; 38. Vertical rod; 41. Rotating shaft ; 42. Conductive clamp; 43. Adjustment groove; 51. First rotating rod; 52. First bevel gear; 53. Rotating plate; 54. Brush bristles; 55. Paste brush; 61. Second rotating rod; 62. Second bevel gear; 63. Second protruding post; 64. T-shaped post; 65. Second rotary groove; 66. Pump cylinder; 67. Piston; 68. Connecting rod; 69. Storage compartment; 691. Conduit; 71. Second insert; 72. Secondary moving contact plug; 73. Through groove; 74. Fulcrum; 75. Conductive strip; 76. Third torsion spring; 77. Empty groove; 81. Adjustment frame; 82. Pressure plate. Detailed Implementation
[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.
[0021] Example 1, please refer to Figures 1-14 As shown, this invention discloses a power distribution cabinet drawer unit, including a drawer 11. Two sets of primary moving contact plugs 32 are installed at the rear of the drawer 11. Each primary moving contact plug 32 has a slidable adjustment plate 34 at its bottom. Two toggle posts 36 are symmetrically slidably installed on the top surface of the adjustment plate 34. A connecting frame 37 is installed on the side of one of the adjustment plates 34. The connecting frame 37 is installed inside the primary moving contact plug 32. A vertical rod 38 is fixed on the top of the connecting frame 37. The vertical rod 38 slides inside the rear of the drawer 11. The connecting frame 37 is rotatably connected to a conductive clamp 42 at each of its sliding primary moving ends. An adjustment groove 43 is opened on the conductive clamp 42, and the toggle post 36 slides in the corresponding adjustment groove 43.
[0022] A second panel 71 is installed above the rear of the drawer 11. Several secondary moving contact plugs 72 are installed at equal intervals on the outer side of the second panel 71. Each secondary moving contact plug 72 has a through groove 73 inside. A pair of conductive strips 75 are symmetrically rotatably connected in the through groove 73. The tail end of the conductive strip 75 has a hollow groove 77.
[0023] An adjustment frame 81 slides inside the second panel 71. Each end of the adjustment frame 81 slides inside a number of secondary moving contact plugs 72. Each end of the adjustment frame 81 is fixed with a pressure plate 82. Both ends of each pressure plate 82 slide in the corresponding empty slot 77.
[0024] A circuit breaker 12 and a control lever 13 are installed inside the drawer 11. The control lever 13 is rotatably connected to the circuit breaker 12. Both ends of the control lever 13 pass through the front end of the drawer 11 and the circuit breaker 12, respectively. A knob 14 is installed at one end of the control lever 13. A first bracket 15 is fixed inside the drawer 11. A sleeve 16 slides horizontally inside the first bracket 15. The tail end of the control lever 13 is rotatably connected to the inside of the sleeve 16. A first spiral groove 17 is opened through the surface of the sleeve 16. The first spiral groove 17 is a spiral groove. A first protrusion 18 is fixed at the tail end of the control lever 13, and the first protrusion 18 slides inside the first spiral groove 17.
[0025] A second bracket 21 is fixed inside the rear of drawer 11. A slide rod 22 and a first spring 23 are installed inside the second bracket 21. The slide rod 22 is elastically connected to the interior of the second bracket 21 through the first spring 23. A crossbar 24 is vertically fixed to the rear end of the slide rod 22. Several insert rods 25 are fixed at equal intervals on the side of the crossbar 24.
[0026] Each insertion rod 25 has two wing teeth 26 and two first torsion springs 27 symmetrically installed inside. Each wing tooth 26 is elastically connected to both sides of the insertion rod 25 through the corresponding first torsion spring 27. A top rod 28 and a second spring 29 are installed inside the tail end of the insertion rod 25. The top rod 28 is elastically connected to the inside of the insertion rod 25 through the second spring 29, and one end of the top rod 28 protrudes from the tail end of the insertion rod 25. A wing plate 291 is symmetrically fixed to the other end of the top rod 28, and the wing plate 291 abuts against the corresponding wing tooth 26.
[0027] A pair of first panels 31 are symmetrically installed at the rear of drawer 11. Several primary moving contact plugs 32 are fixed on each first panel 31, and several plug rods 25 slide inside the corresponding first panel 31 and primary moving contact plugs 32. Each primary moving contact plug 32 has an inner hollow groove 33. A third spring 35 is installed inside the primary moving contact plug 32. The adjusting plate 34 is elastically connected to the inside of the primary moving contact plug 32 through the third spring 35.
[0028] Each conductive strip 75 is provided with a fulcrum 74, which is installed inside the secondary moving contact plug 72. A third torsion spring 76 is sleeved inside the fulcrum 74, and the conductive strip 75 is elastically connected to the fulcrum 74 through the third torsion spring 76.
[0029] The pressure plate 82 has a T-shaped structure at both ends, and the two ends of the pressure plate 82 abut against the surface of the corresponding conductive strip 75.
[0030] Before drawer 11 is inserted into the distribution cabinet, inside drawer 11, knob 14 drives control lever 13 to rotate, causing circuit breaker 12 to close and disconnecting the internal circuit of drawer 11. During the rotation of control lever 13, the first protrusion 18 rotates, and the tail end of control lever 13 rotates within sleeve 16. The first protrusion 18 slides within the first rotating groove 17, and the engagement of the first protrusion 18 and the first rotating groove 17 drives sleeve 16 to slide horizontally away from control lever 13. As sleeve 16 slides, the first bracket 15 provides support.
[0031] Before drawer 11 is inserted into the distribution cabinet, there is a distance between the tail end of sleeve rod 16 and slide rod 22, that is, during the first half of the sliding stroke of sleeve rod 16, the tail end of sleeve rod 16 does not contact slide rod 22, and slide rod 22 does not move; during the second half of the sliding stroke of sleeve rod 16, the tail end of sleeve rod 16 abuts against and drives slide rod 22 to slide together, so that slide rod 22 slides in the second bracket 21, compressing the first spring 23 and driving crossbar 24 to move synchronously.
[0032] The crossbar 24 drives several insertion rods 25 at both ends to slide simultaneously into each primary moving contact plug 32. Each insertion rod 25 passes through the first insert plate 31 and is inserted into a corresponding primary moving contact plug 32. Two protruding wing teeth 26 on its sides push an adjusting plate 34 inside each primary moving contact plug 32 to slide in the direction of the insertion rod 25's movement. The adjusting plate 34 has guide holes through which the insertion rods 25 can pass, and the tail end of each insertion rod 25 slides through the corresponding adjusting plate 34.
[0033] As per the instruction manual Figure 8 As shown, the adjusting plate 34 is pushed to the left by the two wing teeth 26 on both sides of the insert rod 25. The two symmetrical pins 36 on the top of the adjusting plate 34 slide in the corresponding adjusting grooves 43 on the conductive clamp 42. The top surface of the adjusting plate 34 has two symmetrical grooves for the pins 36 to slide, and the sliding direction of the pins 36 is perpendicular to the movement direction of the adjusting plate 34, thereby driving the conductive clamp 42 to rotate around the rotating shaft 41, adjusting it from a clamped state to an open state, as shown in the attached instruction manual. Figure 8 The state of the conductive clamp 42. (See attached instruction manual) Figure 8 The position of the adjusting plate 34 is when the insertion rod 25 springs back. In this state, the conductive clamp 42 is in the open state through the cooperation of the lever 36 and the adjusting groove 43. The state described here is that the adjusting plate 34 should be in contact with the wing teeth 26 on both sides of the insertion rod 25.
[0034] Preferably, the adjusting plate 34 is provided with a guide hole for the insertion rod 25 to pass through, and the insertion rod 25 can slide relative to the adjusting plate 34; a one-way wing tooth 26 is elastically installed on the insertion rod 25, and the wing tooth 26 can push the adjusting plate 34 only when the insertion rod 25 moves in one direction, such as the extension direction, and is pressed into the insertion rod 25 by the adjusting plate 34 when it moves in the opposite direction.
[0035] As per the instruction manual Figure 2 and attached Figure 5 As shown, the adjusting plate 34 inside the primary moving contact plug 32 at the middle of the left side of the drawer 11 is also connected to a connecting bracket 37. When the adjusting plate 34 slides as described above, the connecting bracket 37 drives the vertical rod 38 to slide. The vertical rod 38 pushes the adjusting bracket 81 to slide closer to the secondary moving contact plug 72. The adjusting bracket 81 slides inside the second insert 71 and the secondary moving contact plug 72, and drives the pressure plates 82 at both ends of the adjusting bracket 81 to slide in the corresponding slots 77, as shown in the instruction manual. Figure 13 As shown, the adjusting frame 81 drives the pressure plate 82 to slide to the right, and the pressure plate 82 releases one end of the conductive strip 75. As the pressure applied by the pressure plate 82 decreases, and driven by the elastic force of the third torsion spring 76, the other end of the conductive strip 75 gradually rotates into the secondary moving contact plug 72, thereby being inserted into the through groove 73.
[0036] Preferably, the drawer 11 has a channel at its rear for the vertical rod 38 to pass through. The vertical rod 38, which is fixed at the top of the connecting bracket 37, passes through this channel and extends into the rear of the drawer 11, and can slide relative to the rear of the drawer 11.
[0037] Insert drawer 11 into the distribution cabinet. Since the conductive clamp 42 has already been adjusted to the open state and the conductive strip 75 has been retracted into the through slot 73, during the insertion of drawer 11 into the distribution cabinet, although several primary moving plugs 32 and secondary moving plugs 72 are connected to their corresponding sockets in the distribution cabinet, and the incoming cable tray in the distribution cabinet is also inserted into the inner slot 33, the conductive clamp 42 and conductive strip 75 do not contact the incoming cable tray. Therefore, during the relative sliding process of the primary moving plugs 32 and secondary moving plugs 72 with the incoming cable tray, the conductive clamp 42 and conductive strip 75 are respectively housed within the primary and secondary moving plugs 32 and 72, which minimizes wear between the conductive clamp 42 and conductive strip 75 and the incoming cable tray, effectively avoiding problems such as increased resistance and increased energy consumption caused by wear of the connectors.
[0038] As described above, before drawer 11 is inserted into the distribution cabinet, the plug rod 25 uses the wing teeth 26 to push the adjusting plate 34 to the front end of the conductive clamp 42. That is, the plug rod 25 pushes the adjusting plate 34 through the wing teeth 26, causing it to slide to the frontmost position inside the primary moving contact plug 32. At this time, when the adjusting plate 34 reaches its maximum distance, the protruding push rod 28 at the end of the plug rod 25 abuts against the inner wall of the primary moving contact plug 32, causing the push rod 28 to slide inward into the plug rod 25. While the push rod 28 compresses the second spring 29, it uses its end wing plate 291 to push the wing teeth 26, causing the wing teeth 26 to rotate inward into the plug rod 25, resulting in the first torsion spring 27 storing force. Finally, the wing teeth 26 retract into the plug rod 25, no longer obstructing the sliding of the adjusting plate 34.
[0039] Specifically, since the wing tooth 26 is retracted into the insert rod 25, the adjusting plate 34 is no longer constrained by the insert rod 25 and can slide freely within the primary contact plug 32.
[0040] Subsequently, drawer 11 is inserted into the distribution cabinet. During the process of inserting the primary contact plug 32 into the corresponding socket, the bottom edge of the socket pushes the adjusting plate 34 to slide inside the primary contact plug 32, as shown in the instruction manual. Figure 5 As shown, the bottom of the adjusting plate 34 protrudes beyond the bottom surface of the corresponding primary moving contact plug 32. That is, during the insertion of the primary moving contact plug 32 into the corresponding socket, the socket reacts against the adjusting plate 34, causing the adjusting plate 34 to slide closer to the first insert plate 31. (The rest of the instructions are omitted as they are not part of the instructions.) Figure 8In the middle, the adjusting plate 34 slides to the right, compressing the third spring 35. Through the cooperation of the lever 36 and the adjusting groove 43, the conductive clamp 42 swings around the rotating shaft 41, gradually adjusting from the open state to the clamped state. During this process, the wing tooth 26 has already retracted into the insertion rod 25 and will not hinder the sliding of the adjusting plate 34. When the swing is complete, the conductive clamp 42 clamps the incoming line in the distribution cabinet, completing the conductive connection.
[0041] While the adjusting plate 34 slides to the right, it also drives the adjusting frame 81 to slide in the second insert 71 and the secondary moving contact plug 72 through the connecting frame 37 and the vertical rod 38, as shown in the instruction manual. Figure 13 As shown, the adjusting frame 81 slides to the left, causing the pressure plate 82 to slide in the slot 77. The pressure plate 82 presses the ends of the two conductive strips 75 towards the middle, causing the conductive strips 75 to rotate around the fulcrum 74. The third torsion spring 76 stores force, and the other end of the conductive strip 75 is exposed from the through slot 73 and contacts the inlet busbar to complete the circuit connection.
[0042] Then, rotating knob 14 causes control lever 13 to rotate, connecting circuit breaker 12. Simultaneously, control lever 13 retracts sleeve 16 through the engagement of first protrusion 18 and first rotary groove 17, thereby releasing slide rod 22. Subsequently, under the elastic force of first spring 23, slide rod 22 drives crossbar 24 to reset, and crossbar 24 drives several insertion rods 25 to reset. During the reset process of insertion rod 25, its end moves away from the inner wall of primary moving contact plug 32. Under the elastic force of second spring 29, top rod 28 pops out again from the end of insertion rod 25, so that wing plate 291 no longer presses against wing tooth 26. First torsion spring 27 releases pressure, causing wing tooth 26 to rotate out of insertion rod 25. As the insertion rod 25 continues to retract, the re-extruded wing tooth 26 passes through the adjusting plate 34. In this direction of movement, the wing tooth 26 can be pushed by the adjusting plate 34 to rotate back into the insertion rod 25. After completely passing through the adjusting plate 34, the wing tooth 26 rotates out again under the elastic force of the first torsion spring 27, and finally the insertion rod 25 returns to its initial position.
[0043] When removing drawer 11 from the distribution cabinet, first rotate control lever 13 to disconnect circuit breaker 12. Simultaneously, control lever 13 drives sleeve lever 16 to press slide lever 22. Slide lever 22, through crossbar 24, drives insertion lever 25 to slide into primary moving contact plug 32. Insertion lever 25 then uses wing teeth 26 to drive adjusting plate 34 to slide, thereby adjusting the clamped conductive clamp 42 to the open state. Similarly, the sliding of adjusting plate 34 will drive adjusting bracket 81 and pressure plate 82 to slide through connecting bracket 37 and vertical rod 38, allowing conductive strip 75 to retract into through slot 73 again. In this way, conductive clamp 42 and conductive strip 75 no longer abut against the inlet cable. During the subsequent removal of drawer 11, friction between conductive clamp 42, conductive strip 75 and inlet cable is also avoided, reducing wear on connectors and thus improving connector lifespan and conductivity.
[0044] Example 2 is an explanation based on Example 1. For details, please refer to [link / reference]. Figures 1-14 A first rotating rod 51 is installed inside the primary moving contact plug 32 between the upper and lower conductive clamps 42. A first bevel gear 52 is fixed to one end of the first rotating rod 51, and a rotating plate 53 is fixed to the other end of the first rotating rod 51. A brush bristle 54 is installed at one end of the rotating plate 53, and a paste brush 55 is installed at the other end of the rotating plate 53.
[0045] A second rotating rod 61 is installed inside the primary moving contact plug 32 between the upper and lower conductive clamps 42. A second bevel gear 62 is installed at one end of the second rotating rod 61, meshing with the first bevel gear 52. A second protrusion 63 is fixed to the other end of the second rotating rod 61. A T-shaped post 64 slides inside the primary moving contact plug 32, with the sides of the conductive clamps 42 abutting against both ends of the T-shaped post 64. The other end of the second rotating rod 61 is rotatably connected to the middle of the T-shaped post 64. A second swivel groove 65 is provided, and a second protrusion 63 slides in the second swivel groove 65. A pump cylinder 66 and a storage compartment 69 are also installed inside the primary moving contact plug 32 between the upper and lower conductive clamps 42. A piston 67 slides inside the pump cylinder 66, and a connecting rod 68 is fixedly connected between the piston 67 and the T-shaped column 64. The storage compartment 69 and the pump cylinder 66 are interconnected through a conduit 691, and the pump cylinder 66 and the rotating plate 53 are interconnected through another conduit 691.
[0046] Each time the pusher 36 engages with the adjusting groove 43, driving the conductive clamp 42 to the open state, just as the conductive clamp 42 is about to complete its opening action, the outer side of the conductive clamp 42 will push the T-shaped post 64 to slide, as per the instruction manual. Figure 11As shown, when the conductive clamp 42 opens, it pushes the T-shaped column 64 to slide. The T-shaped column 64 then drives the piston 67 inside the pump cylinder 66 to slide through the connecting rod 68. During the sliding process, the piston 67 squeezes the conductive paste stored inside the pump cylinder 66 into the conduit 691, and then pumps it into the first rotating rod 51 through the conduit 691, and finally into the rotating plate 53, flowing out from the paste brush 55. The T-shaped column 64 has a second swirl groove 65 in the middle that can cooperate with the second protrusion 63. During the movement of the T-shaped column 64, it also drives the second rotating rod 61 to rotate through the cooperation of the second swirl groove 65 and the second protrusion 63. The second bevel gear 62 at the end of the second rotating rod 61 rotates together, thereby driving the first bevel gear 52 to rotate, and then driving the first rotating rod 51 to rotate. The first rotating rod 51 then drives the rotating plate 53 to rotate. The rotating plate 53 is provided with bristles 54 and paste brushes 55 at both ends. During the rotation of the rotating plate 53, the brush 54 first brushes the contact surface between the conductive clamp 42 and the input busbar to remove the hardened and dirty conductive paste. Then, the paste-applying brush 55 brushes the surface of the conductive clamp 42, evenly applying the conductive paste to the contact surface between the conductive clamp 42 and the input busbar. This completes the maintenance of the conductive clamp 42, further improving its service life and conductivity. The conductive paste can reduce wear, inhibit oxidation, lower the contact surface temperature, and improve conductivity.
[0047] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. For those skilled in the art, other variations or modifications can be made based on the above description. It is impossible to exhaustively list all the implementation methods here. All obvious variations or modifications derived from the technical solutions of the present invention are still within the protection scope of the present invention.
Claims
1. A power distribution cabinet drawer unit, comprising a drawer (11), characterized in that: Two sets of primary moving contact plugs (32) are installed at the rear of the drawer (11). Each primary moving contact plug (32) has a sliding adjustment plate (34) at the bottom inside. Two toggle posts (36) are symmetrically slidably installed on the top surface of the adjustment plate (34). A connecting frame (37) is installed on the side of one of the adjustment plates (34). The connecting frame (37) is installed inside the primary moving contact plug (32). A vertical rod (38) is fixed on the top of the connecting frame (37). The vertical rod (38) slides inside the rear of the drawer (11). Each of the primary moving contact plugs (32) has two symmetrically installed rotating shafts (41) inside. Each of the rotating shafts (41) has a conductive clamp (42) rotatably connected to its upper and lower ends. The conductive clamp (42) has an adjustment groove (43) on it. The pin (36) slides in the corresponding adjustment groove (43). A second panel (71) is installed above the rear of the drawer (11). Several secondary moving contact plugs (72) are installed at equal intervals on the outer side of the second panel (71). Each secondary moving contact plug (72) has a through groove (73) inside. A pair of conductive strips (75) are symmetrically rotatably connected in the through groove (73). The tail end of the conductive strips (75) has a hollow groove (77). The second panel (71) has an adjustment frame (81) that slides inside. Each end of the adjustment frame (81) slides inside a plurality of secondary moving contact plugs (72). Each end of the adjustment frame (81) is fixed with a pressure plate (82). Both ends of each pressure plate (82) slide in the corresponding slot (77).
2. The power distribution cabinet drawer unit according to claim 1, characterized in that: The drawer (11) is equipped with a circuit breaker (12) and a control lever (13). The control lever (13) is rotatably connected to the circuit breaker (12). The two ends of the control lever (13) pass through the front end of the drawer (11) and the circuit breaker (12) respectively. A knob (14) is installed at one end of the control lever (13). A first bracket (15) is fixed inside the drawer (11). A sleeve rod (16) slides horizontally inside the first bracket (15). The tail end of the control lever (13) is rotatably connected to the inside of the sleeve rod (16). A first rotary groove (17) is opened through the surface of the sleeve rod (16). A first protrusion (18) is fixed at the tail end of the control lever (13), and the first protrusion (18) slides inside the first rotary groove (17).
3. The power distribution cabinet drawer unit according to claim 1, characterized in that: The drawer (11) has a second bracket (21) fixed inside its rear end. The second bracket (21) has a slide rod (22) and a first spring (23) installed inside it. The slide rod (22) is elastically connected to the second bracket (21) through the first spring (23). A crossbar (24) is vertically fixed to the rear end of the slide rod (22). Several insert rods (25) are fixed at equal intervals on the side of the crossbar (24). The rear end of each insert rod (25) slides through the corresponding adjusting plate (34). Two wing teeth (26) are symmetrically installed inside each insert rod (25). Two first torsion springs (27) are provided. Each of the wing teeth (26) is elastically connected to both sides of the insert rod (25) through the corresponding first torsion spring (27). A top rod (28) and a second spring (29) are installed inside the tail end of the insert rod (25). The top rod (28) is elastically connected to the inside of the insert rod (25) through the second spring (29). One end of the top rod (28) protrudes from the tail end of the insert rod (25). A wing plate (291) is symmetrically fixed to the other end of the top rod (28). The wing plate (291) abuts against the corresponding wing tooth (26).
4. The power distribution cabinet drawer unit according to claim 3, characterized in that: The drawer (11) is symmetrically equipped with a pair of first panels (31) at the rear. Each first panel (31) is fixed with a number of primary moving plugs (32), and a number of plug rods (25) slide inside the corresponding first panel (31) and primary moving plugs (32). Each primary moving plug (32) is provided with an inner hollow groove (33). A third spring (35) is installed inside the primary moving plug (32), and the adjusting plate (34) is elastically connected to the inside of the primary moving plug (32) through the third spring (35).
5. The power distribution cabinet drawer unit according to claim 4, characterized in that: A first rotating rod (51) is installed inside the primary moving contact plug (32) between the upper and lower conductive clamps (42). A first bevel gear (52) is fixed at one end of the first rotating rod (51), and a rotating plate (53) is fixed at the other end of the first rotating rod (51). A brush bristle (54) is installed at one end of the rotating plate (53), and a paste brush (55) is installed at the other end of the rotating plate (53).
6. The power distribution cabinet drawer unit according to claim 5, characterized in that: A second rotating rod (61) is also installed inside the primary moving contact plug (32) between the upper and lower conductive clamps (42). A second bevel gear (62) is installed at one end of the second rotating rod (61), and the second bevel gear (62) meshes with the first bevel gear (52). A second protruding post (63) is fixed at the other end of the second rotating rod (61). A T-shaped post (64) slides inside the primary moving contact plug (32), and the sides of the conductive clamps (42) abut against the two ends of the T-shaped post (64). The other end of the second rotating rod (61) is rotatably connected to the middle of the T-shaped post (64). 4) A second swivel groove (65) is provided in the middle. The second protrusion (63) slides in the second swivel groove (65). A pump cylinder (66) and a storage compartment (69) are also installed inside the primary moving contact plug (32) between the upper and lower conductive clamps (42). A piston (67) slides inside the pump cylinder (66). A connecting rod (68) is fixedly connected between the piston (67) and the T-shaped column (64). The storage compartment (69) and the pump cylinder (66) are connected to each other through a conduit (691). The pump cylinder (66) and the rotating plate (53) are connected to each other through the conduit (691).
7. The power distribution cabinet drawer unit according to claim 3, characterized in that: Each of the conductive strips (75) is provided with a fulcrum (74), the fulcrum (74) is installed inside the secondary moving contact plug (72), a third torsion spring (76) is sleeved inside the fulcrum (74), and the conductive strip (75) is elastically connected to the fulcrum (74) through the third torsion spring (76).
8. The power distribution cabinet drawer unit according to claim 7, characterized in that: The pressure plate (82) has a T-shaped structure at both ends, and the two ends of the pressure plate (82) abut against the surface of the conductive strip (75).