Auxiliary wiring device inside distribution box

Abstract

The present invention discloses an auxiliary wiring device inside a distribution box, specifically relating to the technical field of distribution boxes, including a distribution box housing, a distribution wiring assembly provided on the distribution box housing, the distribution wiring assembly including a support frame installed on one side of the bottom of the inner wall of the distribution box housing by bolts, and a plurality of IGBT modules installed on the support frame by bolts. The present invention uses the corresponding coordinated use of various structures to respectively pass the shunt wires in each main cable through the corresponding insulating wire sleeve, and positions the wires through the insulating wire sleeve, so as to facilitate the connection of the wires to the electrical equipment or IGBT modules. The branching rod, the articulated sleeve and the insulating wire sleeve can be fine-tuned on the limit block to adjust the position of the articulated sleeve and the insulating wire sleeve, so that when the wires pass through the insulating wire sleeve and are connected, the wires are in contact at different positions, thereby avoiding the wires from falling off due to the lack of support at the connection between the wires and the wiring equipment, thereby ensuring the stability of the wiring.

Description

Technical Field

[0001] The present invention relates to the technical field of distribution boxes, and more particularly to an auxiliary wiring device inside a distribution box. Background Art

[0002] The distribution box has the characteristics of small size, easy installation, special technical performance, fixed position, unique configuration function, no site restrictions, wide application, stable and reliable operation, high space utilization, small footprint and environmental protection. It is the control center for commanding various components in the power supply line to reasonably distribute electric energy. It is the control link for reliably receiving upper power supply and correctly feeding load electric energy. It is also the key to obtaining user satisfaction with power supply quality. Improving the operational reliability of power distribution box is the goal of creating high-quality projects. The massive parameters on the distribution box data generally constitute low-voltage forest according to electrical wiring, requiring the assembly of switchgear, measuring instruments, protective electrical appliances and auxiliary equipment A low-voltage distribution box is constructed in a closed or semi-closed metal cabinet or on a screen. During normal operation, the circuit can be connected or disconnected by manual or automatic switches. In the event of a fault or abnormal operation, a protective device can be used to cut off the circuit or alarm. Measuring instruments can display various operating parameters, and certain electrical parameters can also be adjusted. Warnings or signals can be issued when the normal operating state deviates. Distribution box structures are divided into two types: welded structure, which simply cuts, bends, and punches holes in sheet metal parts before welding them together; and assembled structure, which processes sheet metal parts separately. After each part is processed, it is assembled and reinforced with screws and tees. It has a beautiful appearance, is easy to operate, and can save a lot of transportation costs. To ensure the normal operation of the distribution box during use, external wires are required to provide power, which requires the use of wiring devices to protect the external wires.

[0003] Among them, patent publication number CN115912073A discloses a wiring device for a distribution box, which relates to the technical field of distribution boxes and includes a mounting plate, mounting holes are opened at the four corners of the front of the mounting plate, and a waterproof mechanism is provided on the front of the mounting plate; the waterproof mechanism includes a fixing block, a side plate, a baffle, a first circular hole, a rubber ring, a rectangular groove, a rectangular block, a wiring block, and a second circular hole. The back outer wall of the fixing block is fixedly connected to the front outer wall of the mounting plate, and the bottom of the side plate is fixedly connected to the bottom of the fixing block, and there are two side plates.

[0004] When this structure is in use, the mounting plate is installed to the wire hole on the distribution box through the mounting hole, so that the external wire passes through the round hole two and the round hole one. The rubber ring can seal the gap between the external wire and the round hole one. Combined with the two side plates, the wiring device can effectively prevent rainwater from entering the distribution box and avoid damage to the internal circuit of the distribution box. However, this structure is not easy to sort different wires when in use, resulting in messy wiring, and it is not easy to adjust the tightness of the wiring, resulting in inconvenience during wiring. Summary of the Invention

[0005] In order to overcome the above-mentioned defects of the prior art, the present invention provides an auxiliary wiring device inside a distribution box, aiming to solve the problems raised in the above-mentioned background technology.

[0006] The present invention provides the following technical solutions: an auxiliary wiring device inside a distribution box, comprising a distribution box housing, wherein a distribution wiring assembly is provided on the distribution box housing;

[0007] The power distribution wiring assembly includes a support frame mounted on one side of the bottom of the inner wall of the distribution box housing by bolts, and a plurality of IGBT modules are mounted on the support frame by bolts;

[0008] A wire rack is installed on one side of the top of the inner wall of the distribution box shell by bolts, and a plurality of adjustable vertical plates are provided on the outside of the wire rack, and each of the vertical plates is hinged with a plurality of angle-adjustable connecting plates, and a wire management row for managing wires is provided on one side of each connecting plate;

[0009] The harness has a plurality of locking plates at its bottom that are adapted to lock the harness and to lock the harness. The harness has a plurality of locking plates at its bottom that are adapted to lock the harness. The plurality of locking plates have respective locking plates that are adapted to lock the harness.

[0010] It can be seen that in the above technical solution, the insulating wire bundle is used to position the wires, which facilitates the connection of the wires to the electrical equipment or IGBT module. At the same time, the micro-motor drives the traction rod to rotate. When the traction rod rotates, the pull rod is displaced and deflected. When the pull rod deflects, the vertical axis block is driven to slide in the first guide groove, so that the branching rod, the articulated sleeve and the insulating wire bundle can be fine-tuned on the limit block, and the position of the articulated sleeve and the insulating wire bundle is adjusted. When the wire passes through the insulating wire bundle, the wires are contacted at different positions when wiring, avoiding the wires from falling off due to lack of support at the connection between the wires and the wiring equipment, ensuring the stability of the wiring, and constraining the main cable through the limit block. The position of each wire management row is adjusted by the vertical plate gathering and spreading toward the axis of the screw rod, so as to realize the function of tensioning and adjusting the main cable.

[0011] Optionally, in a possible embodiment, a plurality of micromotors are mounted on the limit block by bolts, and a traction rod is fixedly provided on the output end of each of the micromotors, and a plurality of adjustment holes are penetrated through the plurality of traction rods, a pull rod is provided at one end of the traction rod, a limit shaft is fixedly provided at one end of the pull rod, and the limit shaft extends into the adjustment hole and is rotatably connected to the adjustment hole, the pull rod extends to the vertical shaft block and is rotatably connected to the vertical shaft block, a screw rod is rotatably connected to the wire rack, a threaded cylinder is threadedly connected to the outer side of the screw rod, and a plurality of shaft hole plates are fixedly provided on the outer side of the threaded cylinder, and a plurality of the shaft hole plates are respectively located on one side of the corresponding vertical plate, and each of the shaft hole plates is hinged with an axis pin for driving the displacement of the vertical plate, and each One end of each of the shaft pins extends to support the vertical plate and is rotatably connected to the vertical plate, one end of each of the plurality of cable management rows is fixedly provided with a spring, a plurality of guide slots are provided through the outer side of the cable rack, and each of the slide slots is located on one side of the bottom of the corresponding vertical plate, a slide plate is slidably connected in the plurality of slide slots, and one end of each of the springs extends to the cable rack and the slide plate respectively, a driving motor for driving the screw rod to rotate is installed on one side of the cable rack by a bolt, an inverter is provided on the top of the support frame which is detachably connected to the distribution box housing by bolts, and a power pin plate is provided on one side of the inner wall of the distribution box housing, the power pin plate is connected to the inverter by a wire, and the inverter is connected to the IGBT module by a wire;

[0012] It can be seen that in the above technical solution, when the vertical plate, connecting plate and cable management row are adjusted in position on the cable rack, the cable management row is limited by the spring during displacement, which will cause the cable management row to rotate along the axis point of the connection between the connecting plate and the vertical plate, thereby realizing the function of adjusting the angle of the cable management row and the connecting plate. At the same time, it is elastically supported by the spring, so that the main cable can also perform corresponding deformation fine-tuning after tensioning adjustment, and then the cable management row is driven to reset by the elasticity of the spring itself, so that the main cable can be in an elastic support state after being fixed.

[0013] The technical effects and advantages of the present invention are as follows:

[0014] 1. The riser of the present invention moves on the cable rack, and the pulley and the second guide groove guide the riser during displacement, and then the riser passes through the through hole. At the same time, the main cable is constrained by the limit block. The position of each cable management row is adjusted by converging and diverging the riser toward the axis of the screw rod, thereby achieving the function of tensioning and adjusting the main cable.

[0015] 2. The present invention allows the shunt wires in the main cable to pass through the corresponding insulating cable sleeves respectively. The branching rod, hinged sleeve and insulating cable sleeve can be fine-tuned on the limit block to adjust the position of the hinged sleeve and the insulating cable sleeve. After the wires pass through the insulating cable sleeves, different positions of the wires are contacted when wiring. This prevents the wires from falling off due to lack of support at the connection between the wires and the wiring equipment, thereby ensuring wiring stability.

[0016] 3. When the cable management bar of the present invention is displaced, it is limited by the spring, causing the cable management bar to rotate along the axis point where the connecting plate and the riser are connected, thereby realizing the function of adjusting the angle of the cable management bar and the connecting plate. At the same time, the spring elastically supports it, so that the main cable can also perform corresponding deformation fine-tuning after tensioning and adjustment. Then, the elasticity of the spring itself drives the cable management bar to reset, so that the main cable can be in an elastically supported state after being fixed.

[0017] 4. The present invention installs one end of the wire on the power pin board, which transmits current to the inverter, converts the current through the inverter, and then transmits the current to the IGBT module through the wire, making it easy for each IGBT module to split and transmit the current;

[0018] In summary, the overall design is simple and the structure is reasonable. Through the corresponding coordinated use of various structures, the main cable is constrained by the limit block, and the position of each cable management row is adjusted by gathering and spreading the vertical plate toward the axis of the screw rod, so as to realize the function of tensioning and adjusting the main cable, and the shunt wires in each main cable are respectively passed through the corresponding insulating cable sleeve, and the wires are positioned by the insulating cable sleeve, which facilitates the branching of the wires on the electrical equipment or IGBT module. The branching rod, the hinged sleeve and the insulating cable sleeve can be fine-tuned on the limit block, and the position of the hinged sleeve and the insulating cable sleeve is adjusted to realize that when the wires pass through the insulating cable sleeve and are connected, the wires are contacted at different positions, thereby avoiding the wires from falling off due to the lack of support at the connection between the wires and the wiring equipment, ensuring the stability of the wiring, and being elastically supported by the spring, so that the main cable can also perform corresponding deformation fine-tuning after the tension adjustment, and then the cable management row is reset by the elasticity of the spring itself, so that the main cable can be in an elastic support state after being fixed. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] To more clearly illustrate the technical solutions of the present disclosure, the following briefly introduces the drawings required for use in some embodiments. Obviously, the drawings described below are only drawings of some embodiments of the present disclosure, and those skilled in the art can also derive other drawings based on these drawings. Furthermore, the drawings described below are schematic diagrams and are not intended to limit the actual dimensions of the products, actual processes of the methods, actual timing of signals, and the like involved in the embodiments of the present disclosure.

[0020] Figure 1 It is the main view of the overall structure of the present invention.

[0021] Figure 2 This is a three-dimensional diagram of the power distribution wiring assembly of the present invention.

[0022] Figure 3 It is a three-dimensional diagram of the wire rack, threaded barrel, shaft hole plate, slide plate and spring of the present invention.

[0023] Figure 4 For the present invention Figure 3 side view.

[0024] Figure 5 This is a schematic diagram of the distribution rod, hinged sleeve, insulating wire bundle body and micro motor installed on the limit block of the present invention.

[0025] Figure 6 This is a three-dimensional diagram of the cable management bar, connecting plate and pulley of the present invention.

[0026] Figure 7 For the present invention Figure 5 Exploded diagram.

[0027] The accompanying drawings are marked as follows: 1. distribution box shell; 2. support frame; 3. IGBT module; 4. wire rack; 5. vertical plate; 6. connecting plate; 7. wire management bar; 8. wire management trough; 9. limit block; 10. first guide groove; 11. screw rod; 12. branching rod; 13. hinged sleeve; 14. insulating wire bundle sleeve; 15. micro motor; 16. traction rod; 17. adjustment hole; 18. pull rod; 19. vertical axis block; 20. threaded barrel; 21. axis hole plate; 22. axis pin; 23. spring; 24. slide plate; 25. drive motor; 26. power pin plate; 27. inverter; 28. second guide groove; 29. ​​pulley. DETAILED DESCRIPTION

[0028] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0029] As attached Figure 1 - Figure 5 The auxiliary wiring device inside the distribution box shown in the figure uses a distribution wiring assembly set on the distribution box shell 1. Through the corresponding cooperation of various structures, the main cable is constrained by the limit block 9, and the position of each cable arrangement row 7 is adjusted by the vertical plate 5 toward the axis of the screw rod 11 in a manner of gathering and spreading, so as to realize the function of tensioning and adjusting the main cable. The shunt wires in each main cable are respectively passed through the corresponding insulating wire sleeve 14, and the wires are positioned by the insulating wire sleeve 14, which facilitates the connection of the wires to the electrical equipment or IGBT module 3. The branching rod 12, the articulated sleeve 13 and the insulating wire sleeve 14 can be fine-tuned on the limit block 9 to adjust the position of the hinged sleeve 13 and the insulating wire bundle sleeve 14, so that when the wire passes through the insulating wire bundle sleeve 14 and is connected, the wire is contacted at different positions, thereby avoiding the wire falling off due to lack of support at the connection between the wire and the wiring device, ensuring the stability of the wiring. The spring 23 elastically supports it, so that the main cable can also perform corresponding deformation fine-tuning after the tension adjustment, and then the spring 23 itself elastically drives the wire management row 7 to reset, so that the main cable can be in an elastically supported state after being fixed, and the specific structure of the component is set as follows;

[0030] The power distribution wiring assembly includes a support frame 2 mounted on one side of the bottom of the inner wall of the power distribution box housing 1 by bolts, and a plurality of IGBT modules 3 are mounted on the support frame 2 by bolts;

[0031] A wire rack 4 is installed on one side of the top of the inner wall of the distribution box housing 1 by bolts. A number of adjustable vertical plates 5 are provided on the outside of the wire rack 4, and each vertical plate 5 is hinged with a number of angle-adjustable connecting plates 6, and a wire management row 7 for managing wires is provided on one side of each connecting plate 6;

[0032] There are several limit blocks 9 distributed at the bottom of the wire rack 4, and each limit block 9 is installed at the bottom of the wire rack 4 by bolts. A plurality of limit blocks 9 are penetrated by a plurality of first guide grooves 10, and each first guide groove 10 is slidably connected with a vertical axis block 19. The bottom of the plurality of vertical axis blocks 19 is fixed with a branching rod 12, and each branching rod 12 is hinged with an articulated sleeve 13 for tensioning the cable, and the bottom of each articulated sleeve 13 is provided with an insulating wire sleeve 14 for positioning the cable. The wire rows 7 are all provided with wire management grooves 8 for managing wires, and each wire management row 7 is stacked, and a plurality of limit blocks 9 are respectively located at the bottom of the corresponding vertical plates 5. The wire rack 4 is provided with a plurality of second guide grooves 28, and each second guide groove 28 is respectively located at the bottom of the corresponding vertical plate 5, and a through hole is provided on one side of the surface of each second guide groove 28. The bottoms of the plurality of vertical plates 5 are all threadedly connected with pulleys 29, and each pulley 29 passes through the corresponding second guide groove 28 and extends to one side of the wire rack 4;

[0033] A number of micro motors 15 are mounted on the limit block 9 by bolts, and a traction rod 16 is fixedly provided on the output end of each micro motor 15, and a number of adjustment holes 17 are penetrated on the multiple traction rods 16, a pull rod 18 is provided at one end of the traction rod 16, a limit shaft is fixedly provided at one end of the pull rod 18, and the limit shaft extends into the adjustment hole 17 and is rotatably connected to the adjustment hole 17, the pull rod 18 extends to the vertical shaft block 19 and is rotatably connected to the vertical shaft block 19, a screw rod 11 is rotatably connected to the wire rack 4, a threaded barrel 20 is threadedly connected to the outer side of the screw rod 11, and a number of shaft hole plates 21 are fixedly provided on the outer side of the threaded barrel 20, and a number of shaft hole plates 21 are respectively located on one side of the corresponding vertical plate 5, and each shaft hole plate 21 is hinged with a shaft pin 22 for driving the displacement of the vertical plate 5, and each shaft One end of the pin 22 extends to the support vertical plate 5 and is rotatably connected to the vertical plate 5. One end of each of the multiple wire management racks 7 is fixed with a spring 23. A number of guide slots are provided on the outside of the wire rack 4, and each slot is located on one side of the bottom of the corresponding vertical plate 5. A slide 24 is slidably connected in the multiple slots, and one end of each spring 23 extends to the wire rack 4 and the slide 24 respectively. A driving motor 25 for driving the screw rod 11 to rotate is installed on one side of the wire rack 4 by bolts. A frequency converter 27 detachably connected to the distribution box housing 1 by bolts is provided on the top of the support frame 2. A power pin plate 26 is provided on one side of the inner wall of the distribution box housing 1. The power pin plate 26 is connected to the frequency converter 27 by wires, and the frequency converter 27 is connected to the IGBT module 3 by wires.

[0034] According to the above structure, when using the device, the staff will install it at the designated location. When in use, one end of the wire can be installed on the power pin board 26. The power pin board 26 transmits the current to the inverter 27, and the inverter 27 converts the current. After that, the current is transmitted to the IGBT module 3 through the wire, which facilitates the current distribution and transmission of each IGBT module 3.

[0035] At the same time, when the device is used for wiring, one end of the main cable of the power distribution equipment will be passed through the corresponding cable management groove 8 respectively, and the main cable will be positioned by the cable management row 7 and the cable management groove 8. Then, the driving motor 25 drives the screw rod 11 to rotate. When the screw rod 11 rotates, it drives the threaded cylinder 20 and the shaft hole plate 21 to move, and then the shaft pin 22 can be adjusted by the traction force when the shaft hole plate 21 moves. Then, the vertical plate 5 is driven to move on the line rack 4, and the vertical plate 5 is guided when it moves through the pulley 29 and the second guide groove 28. Then, it is passed through the through hole, and the main cable is constrained by the limit block 9. The position of each cable management row 7 is adjusted by the vertical plate 5 toward the axis of the screw rod 11. The function of tensioning and adjusting the main cable is realized;

[0036] At the same time, the shunt wires in each main cable are respectively passed through the corresponding insulating wire sleeve 14, and the wires are positioned by the insulating wire sleeve 14, which facilitates the wire tapping on the electrical equipment or IGBT module 3. At the same time, the micro motor 15 drives the traction rod 16 to rotate. When the traction rod 16 rotates, it drives the pull rod 18 to move and deflect the pull rod 18. When the pull rod 18 deflects, it drives the vertical axis block 19 to slide in the first guide groove 10, so that the branch rod 12, the articulated sleeve 13 and the insulating wire sleeve 14 can be fine-tuned on the limit block 9, and the positions of the articulated sleeve 13 and the insulating wire sleeve 14 are adjusted, so that the wires can be connected at different positions after passing through the insulating wire sleeve 14, avoiding the wires from falling off due to the lack of support at the connection between the wires and the equipment to be wired, thereby ensuring the stability of the wiring;

[0037] At the same time, when the vertical plate 5, the connecting plate 6 and the cable management row 7 are adjusted in position on the cable rack 4, the cable management row 7 is limited by the spring 23 when it is displaced, which will cause the cable management row 7 to rotate along the axis point where the connecting plate 6 and the vertical plate 5 are connected, thereby realizing the function of adjusting the angle of the cable management row 7 and the connecting plate 6. At the same time, the spring 23 elastically supports them, so that the main cable can also perform corresponding deformation fine-tuning after tensioning adjustment, and then the spring 23 itself drives the cable management row 7 to reset, so that the main cable can be in an elastic support state after being fixed.

[0038] Different from the prior art, the present application discloses an auxiliary wiring device inside a distribution box. Through the corresponding coordinated use of various structures, the main cable is constrained by the limit block 9, and the position of each cable arrangement row 7 is adjusted by the vertical plate 5 toward the axis of the screw rod 11 to achieve the function of tensioning and adjusting the main cable. The shunt wires in each main cable are respectively passed through the corresponding insulating wire sleeve 14, and the wires are positioned by the insulating wire sleeve 14, which facilitates the wire tapping on the electrical equipment or IGBT module 3. The branching rod 12, the articulated sleeve 13 and the insulating wire sleeve 14 are connected to the main cable. The wiring harness sleeve 14 can be fine-tuned on the limit block 9 to adjust the position of the hinge sleeve 13 and the insulating wiring harness sleeve 14, so that the wires can be connected at different positions after passing through the insulating wiring harness sleeve 14, avoiding the wires from falling off due to lack of support at the connection between the wires and the wiring equipment, ensuring the stability of the wiring, and elastically supporting it through the spring 23, so that the main cable can also perform corresponding deformation fine-tuning after tensioning adjustment, and then the spring 23 itself drives the cable management row 7 to reset, so that the main cable can be in an elastic support state after being fixed.

[0039] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An auxiliary wiring device inside a distribution box, comprising a distribution box housing, characterized in that: The distribution box housing is provided with a distribution wiring assembly; The power distribution wiring assembly includes a support frame mounted on one side of the bottom of the inner wall of the distribution box housing by bolts, and a plurality of IGBT modules are mounted on the support frame by bolts; A wire rack is installed on one side of the top of the inner wall of the distribution box shell by bolts, and a plurality of vertical plates are provided on the outside of the wire rack, and a plurality of connecting plates are hinged on each of the vertical plates, and a wire management row is provided on one side of each of the connecting plates; A plurality of limit blocks are distributed at the bottom of the wire rack, and a plurality of the limit blocks are penetrated by a plurality of first guide grooves, and a vertical axis block is slidably connected in each of the first guide grooves, and a branching rod is fixedly provided at the bottom of the plurality of vertical axis blocks, and a hinged sleeve is hinged on each of the branching rods, and an insulating wire bundle sleeve is provided at the bottom of each of the hinged sleeves; A plurality of the cable management rows are provided with cable management grooves, and the cable management rows are stacked, and the plurality of the limit blocks are respectively located at the bottom of the corresponding vertical plates; The wire rack is provided with a plurality of second guide grooves, and each of the second guide grooves is located at the bottom of a corresponding vertical plate, and a through hole is provided on one side of the surface of each second guide groove. The bottoms of the plurality of vertical plates are threadedly connected to a pulley, and each of the pulleys passes through the corresponding second guide groove and extends to one side of the wire rack; The wire rack is rotatably connected to a screw rod, the outer side of the screw rod is threadedly connected to a threaded barrel, and the outer side of the threaded barrel is fixedly provided with a plurality of shaft hole plates; The plurality of shaft hole plates are respectively located on one side of the corresponding vertical plate, and each shaft hole plate is hinged with a shaft pin for driving the vertical plate to move, and one end of each shaft pin extends to support the vertical plate and is rotatably connected to the vertical plate.

2. The auxiliary wiring device inside a distribution box according to claim 1, characterized in that: A plurality of micro motors are mounted on the limit block via bolts, and a traction rod is fixedly provided on the output end of each micro motor, and a plurality of traction rods are penetrated by a plurality of adjustment holes.

3. The auxiliary wiring device inside a distribution box according to claim 2, characterized in that: A pull rod is provided at one end of the traction rod, a limit shaft is fixedly provided at one end of the pull rod, and the limit shaft extends into the adjustment hole and is rotatably connected to the adjustment hole, and the pull rod extends to the vertical axis block and is rotatably connected to the vertical axis block.

4. The auxiliary wiring device inside a distribution box according to claim 1, characterized in that: One end of each of the plurality of cable management rows is fixedly provided with a spring, and a plurality of guide slots are provided through the outer side of the cable management rack, and each of the guide slots is located on one side of the bottom of the corresponding vertical plate.

5. The auxiliary wiring device inside a distribution box according to claim 4, characterized in that: A slide plate is slidably connected in each of the plurality of slide grooves, and one end of each spring extends to the wire rack and the slide plate respectively.

6. The auxiliary wiring device inside a distribution box according to claim 1, characterized in that: A driving motor for driving the screw to rotate is installed on one side of the wire rack by bolts, and a frequency converter is provided on the top of the support frame, which is detachably connected to the distribution box shell by bolts. A power connection pin plate is provided on one side of the inner wall of the distribution box shell, and the power connection pin plate is connected to the frequency converter by a wire, and the frequency converter is connected to the IGBT module by a wire.

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