Junction box for frequency conversion cabinet

Abstract

The utility model discloses a junction box for a frequency conversion cabinet, which comprises a junction box, a wire clamping device is arranged in the junction box, the wire clamping device comprises a fixed sleeve, a control sleeve, a guide groove, a guide plate, a bunching block, a spiral groove, a sliding block and a sliding sleeve, the control sleeve is connected to one end of the fixed sleeve, the guide groove is arranged in the fixed sleeve, the guide plate is connected to one side of the bunching block, and the spiral groove is arranged in the sliding block. The spiral groove is formed in the fixing sleeve, the sliding block is connected to the outer side of the sliding sleeve, a driving device is arranged in the wire box and comprises a motor, a connecting rod, a rotating sleeve, a worm and a worm gear, the motor is installed in the wire box, the worm is installed on the connecting rod, the worm gear is installed on the outer side of the rotating sleeve, and a switching device is arranged in the wire box. The switching device comprises a limiting sleeve, a limiting block, a push spring, a lock rod and a lock groove, the limiting block is connected to one end of the lock rod, the lock rod is arranged on the side wall of the rotating sleeve, and the lock groove is formed in the outer wall of the control sleeve.

Description

Technical Field

[0001] This utility model relates to the field of frequency converter cabinet wiring technology, and more specifically, it relates to a junction box for frequency converter cabinets. Background Technology

[0002] In the field of junction box design for frequency converter cabinets, there are many technical problems that urgently need to be solved. These problems seriously affect the practicality and working efficiency of the junction boxes, mainly in the following aspects:

[0003] First, traditional junction boxes have an overly simple and crude internal structure design, lacking a flexible adaptation mechanism. Due to the diverse specifications of cables used in industrial sites, different equipment may require cables of different diameters, and the number of cables required for a single connection point also varies. However, the fixed clamping structure of existing junction boxes cannot effectively clamp cables of different diameters and quantities according to actual needs. This single structural design leads to problems such as unstable wiring and poor contact, which seriously affects the operational safety and reliability of the frequency converter cabinet.

[0004] Secondly, although some improved junction boxes have appeared on the market, which can adapt to different specifications of cables through adjustable clamping mechanisms, these devices still have obvious defects in operation. Specifically, each terminal needs to be manually adjusted and fixed by the operator one by one. This single and repetitive operation not only consumes a lot of manpower and time, but also easily leads to inconsistent clamping quality due to operator fatigue. In large-scale wiring operations, this inefficient operation method seriously affects the installation efficiency and increases construction costs.

[0005] Even more challenging is that while some high-end junction boxes achieve simultaneous clamping of multiple cable groups in an attempt to improve operational efficiency, these devices still exhibit significant limitations in practical applications, particularly when faced with complex wiring requirements. For example, when different groups need to connect cables of different diameters or quantities, or when new lines need to be temporarily added to an existing single cable group, these devices often cannot flexibly switch between multi-group and single-group clamping modes. This functional rigidity not only limits the application scope of the equipment but may also lead to the need to replace dedicated junction boxes in special circumstances, increasing equipment investment and maintenance costs. Furthermore, the lack of this mode-switching capability makes it difficult for the equipment to adapt to the rapidly changing wiring needs in industrial settings, reducing the equipment's practicality and versatility. Utility Model Content

[0006] (a) Technical problems to be solved

[0007] In view of the problems existing in the prior art, this utility model provides a junction box for frequency converter cabinets to solve the technical problems mentioned in the background art.

[0008] (II) Technical Solution

[0009] To achieve the above objectives, this utility model provides the following technical solution: a junction box for a frequency converter cabinet, comprising a junction box, characterized in that: a wire clamping device is provided inside the junction box, the wire clamping device comprising a fixed sleeve, a control sleeve, a guide groove, a guide plate, a wire harness block, a spiral groove, a slider, and a sliding sleeve; the fixed sleeve is fixedly installed inside the junction box; the control sleeve is rotatably connected to one end of the fixed sleeve; the guide groove is formed in the fixed sleeve; the guide plate is slidably disposed in the guide groove and fixedly connected to one side of the wire harness block; the spiral groove is formed inside the fixed sleeve; the slider is slidably disposed in the spiral groove and fixedly connected to the outside of the sliding sleeve; the sliding sleeve is disposed inside the control sleeve; and a driving device is provided inside the junction box. The drive device includes a motor, a connecting rod, a rotating sleeve, a worm gear, and a worm wheel. The motor is detachably installed in the wire box. The worm gear is mounted on the connecting rod, which is rotatably installed in the wire box. The rotating sleeve is rotatably disposed on the outside of the control sleeve. The worm wheel is fixedly installed on the outside of the rotating sleeve, and the worm gear and worm wheel cooperate with each other. A switching device is provided in the wire box. The switching device includes a limiting sleeve, a limiting block, a push spring, a locking rod, and a locking groove. The limiting sleeve is slidably sleeved on the outside of the rotating sleeve. The limiting block is fixedly connected to one end of the locking rod. The two ends of the push spring are respectively connected to the outer wall of the rotating sleeve and one side of the limiting block. The locking rod is slidably disposed on the side wall of the rotating sleeve. Multiple locking grooves are formed on the outer wall of the control sleeve, and one end of the locking rod is inserted into the locking groove.

[0010] The present invention is further configured such that both the guide plate and the guide groove are inclined structural designs.

[0011] The present invention is further provided that a rubber strip is connected to one side of the wire harness block.

[0012] The present invention is further configured such that a mating plate is fixedly provided inside the fixing sleeve, a mating spring is connected to one side of the mating plate, and the other end of the mating spring is connected to one end of the wire harness block. The above-mentioned components ensure the stable use of the wire clamping device.

[0013] The present invention is further configured such that a guide rail is fixedly provided inside the control sleeve, and a guide groove is provided on the outer side of the sliding sleeve. The guide groove is adapted to the guide rail, and the arrangement of the guide rail and the guide groove realizes the guiding and limiting of the sliding sleeve.

[0014] The present invention is further configured such that a speed reduction gearbox is detachably installed inside the junction box, the input end of the speed reduction gearbox is connected to the output end of the motor, and the output end of the speed reduction gearbox is connected to one end of the connecting rod. The speed reduction gearbox can flexibly adjust the motor transmission ratio to ensure stable transmission.

[0015] The present invention is further configured such that a cylinder is detachably provided inside the junction box, and a piston rod is connected to the output end of the cylinder. One end of the piston rod is detachably connected to one end of the limiting sleeve. The configuration of the cylinder and piston rod makes the switching process unnecessary for manual operation, saving time and effort.

[0016] The present invention is further provided that the top of the junction box is detachably provided with a cover plate.

[0017] (III) Beneficial Effects

[0018] Compared with the prior art, this utility model provides a junction box for frequency converter cabinets, which has the following advantages:

[0019] 1. The cable clamping device effectively solves the problem of inflexible adaptation to different cables in existing technologies through the coordinated cooperation of a fixed sleeve, control sleeve, guide groove, guide plate, cable bundle block, spiral groove, slider, and sliding sleeve, combined with the structure of a mating plate, mating spring, and rubber strip. Among them, the guide plate and guide groove adopt a special inclined structure design, which, together with the synchronous movement of the cable bundle block, achieves uniform clamping of the cable; the flexible design of the rubber strip enhances the fit with the cable, ensuring the stability of the wiring, and completely overcomes the defects of traditional junction boxes that are simple in structure and poor in adaptability.

[0020] 2. Through the designed drive device, the precise coordination of the motor, connecting rod, rotating sleeve, worm gear, and worm wheel forms a highly efficient automated drive system. The reduction gearbox enables smooth and precise drive control and synchronous operation of multiple cable sets, making the cable clamping process smoother and more controllable. This effectively solves the problem of time-consuming and labor-intensive manual operation required in existing technologies, and significantly improves wiring efficiency.

[0021] 3. The innovatively designed switching device includes a flexible switching structure of limiting sleeve, limiting block, push spring, locking rod, and locking groove. Combined with the drive design of cylinder and piston rod, it forms a convenient mode conversion system. Through the linkage mechanism of limiting block and locking rod, combined with the reset action of push spring, it ensures flexible switching between multiple and single cable clamping modes. This completely solves the problem of existing technologies being unable to flexibly adjust according to actual needs. Especially when it is necessary to add, remove, or adjust individual cables, this flexible switching mechanism can precisely control the required group of operations, ensuring the accuracy and convenience of wiring operations. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of a junction box for a frequency converter cabinet according to the present invention;

[0023] Figure 2 This is a schematic diagram of the structure of the present invention with the cover plate removed;

[0024] Figure 3 for Figure 2 A magnified schematic diagram of the partial structure at point A in the middle;

[0025] Figure 4 This is a cross-sectional view of the fixed sleeve and rotating sleeve in this utility model.

[0026] Figure 5 for Figure 4 A magnified schematic diagram of the structure at point B in the middle.

[0027] In the diagram: 1. Junction box; 2. Fixing sleeve; 3. Control sleeve; 4. Guide groove; 5. Guide plate; 6. Cable bundle block; 7. Spiral groove; 8. Slider; 9. Sliding sleeve; 10. Motor; 11. Connecting rod; 12. Rotating sleeve; 13. Worm gear; 14. Worm wheel; 15. Limiting sleeve; 16. Limiting block; 17. Push spring; 18. Locking rod; 19. Locking groove; 20. Rubber strip; 21. Mating plate; 22. Mating spring; 23. Guide rail; 24. Guide groove; 25. Gearbox; 26. Cylinder; 27. Piston rod; 28. Cover plate. Detailed Implementation

[0028] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0029] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0030] In this utility model, unless otherwise stated, the orientations used, such as "up" and "down", usually refer to the direction shown in the accompanying drawings, or to the vertical, perpendicular, or gravitational direction; similarly, for ease of understanding and description, "left" and "right" usually refer to the left and right shown in the accompanying drawings; "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not used to limit this utility model.

[0031] Please see Figures 1-5A junction box for a frequency converter cabinet includes a junction box 1. A wire clamping device is installed inside the junction box 1. The wire clamping device includes a fixed sleeve 2, a control sleeve 3, a guide groove 4, a guide plate 5, a wire harness block 6, a spiral groove 7, a slider 8, and a sliding sleeve 9. The fixed sleeve 2 is fixedly installed inside the junction box 1. The control sleeve 3 is rotatably connected to one end of the fixed sleeve 2. The guide groove 4 is formed in the fixed sleeve 2. The guide plate 5 is slidably disposed in the guide groove 4 and fixedly connected to one side of the wire harness block 6. The spiral groove 7 is formed inside the fixed sleeve 2. The slider 8 is slidably disposed in the spiral groove 7 and fixedly connected to the outside of the sliding sleeve 9. The sliding sleeve 9 is disposed inside the control sleeve 3. A driving device is installed inside the junction box 1. The driving device includes a motor 10, a connecting rod 11, a rotating sleeve 12, a worm gear 13, and a worm wheel 14. 4. The motor 10 is detachably installed in the wire box 1. The worm gear 13 is installed on the connecting rod 11. The connecting rod 11 is rotatably installed in the wire box 1. The rotating sleeve 12 is rotatably set on the outside of the control sleeve 3. The worm wheel 14 is fixedly installed on the outside of the rotating sleeve 12. The worm gear 13 and the worm wheel 14 work together. A switching device is provided in the wire box 1. The switching device includes a limiting sleeve 15, a limiting block 16, a push spring 17, a locking rod 18, and a locking groove 19. The limiting sleeve 15 is slidably sleeved on the outside of the rotating sleeve 12. The limiting block 16 is fixedly connected to one end of the locking rod 18. The two ends of the push spring 17 are respectively connected to the outer wall of the rotating sleeve 12 and one side of the limiting block 16. The locking rod 18 is slidably set on the side wall of the rotating sleeve 12. Multiple locking grooves 19 are opened on the outer wall of the control sleeve 3. One end of the locking rod 18 is inserted into the locking groove 19.

[0032] In this embodiment, when all cable clamping devices need to be used simultaneously to clamp the cable, first ensure that all limiting sleeves 15 press the limiting block 16 inward, then open the motor 10 installed in the cable box 1. After the reduction action of the reduction gearbox 25, the output end of the motor 10 drives the connecting rod 11 to rotate. Then the connecting rod 11 drives multiple worm gears 13 to rotate synchronously. Then the multiple worm gears 13 drive the worm wheel 14 that works with them to rotate synchronously. Then the multiple worm wheels 14 drive all rotating sleeves 12 to rotate. Then the rotating sleeves 12 pass through the locking rod 18 and the lock The engagement of groove 19 causes the control sleeve 3 to rotate. Then, the control sleeve 3, through the engagement of guide rail 23 and guide groove 24, causes the inner sliding sleeve 9 to rotate. The sliding sleeve 9 then causes the outer slider 8 to rotate, and the slider 8 slides along the spiral groove 7. Due to the special structural design of the spiral groove 7, the slider 8 causes the sliding sleeve 9 to slide backward. Then, the engagement spring 22 on one side of the engagement plate 21 pushes the wire harness block 6 to slide. The wire harness block 6 then causes the guide plate 5 on one side to slide along the guide groove 4. Due to the special inclined design of the guide plate 5 and guide groove 4... The structural design involves the guide plate 5 moving the cable bundle 6 outwards, then threading the cables into the junction box 1, passing through the control sleeve 3, sliding sleeve 9, and fixed sleeve 2. After threading, the motor 10 reverses direction. The output of the motor 10, after being slowed down by the reduction gearbox 25, drives the connecting rod 11 and worm gear 13 to reverse direction. The worm gear 13 and worm wheel 14 then rotate multiple rotating sleeves 12. These rotating sleeves 12, through the engagement of the locking rod 18 and locking groove 19, drive the control sleeve 3 to rotate in the opposite direction. The control sleeve 3 then... The sliding sleeve 9 rotates in the opposite direction through the cooperation of the guide rail 23 and the guide groove 24. Then, the sliding sleeve 9 slides and resets along the guide rail 23 and the guide groove 24 through the cooperation of the slider 8 and the spiral groove 7. The sliding sleeve 9 pushes the cable bundle 6 to slide. The cable bundle 6 then drives the guide plate 5 and the guide groove 4 to slide in the opposite direction. The guide plate 5 then drives the cable bundle 6 to move inward, so that the cable bundle 6 can stably clamp the cable on the inner side through the rubber strip 20 set on the inner side. After the cable bundle 6 clamps and fixes the cable through the rubber strip 20, the motor 10 can be turned off.

[0033] Please see Figures 1-5 As a further implementation of the overall equipment: both the guide plate 5 and the guide groove 4 are designed with an inclined structure.

[0034] A rubber strip 20 is connected to one side of the cable bundle 6.

[0035] A mating plate 21 is fixedly provided inside the fixed sleeve 2. A mating spring 22 is connected to one side of the mating plate 21, and the other end of the mating spring 22 is connected to one end of the wire harness block 6.

[0036] The control sleeve 3 is fixedly provided with a guide rail 23, and the outer side of the sliding sleeve 9 is provided with a guide groove 24, which is adapted to the guide rail 23.

[0037] The junction box 1 is detachably equipped with a reduction gearbox 25. The input end of the reduction gearbox 25 is connected to the output end of the motor 10, and the output end of the reduction gearbox 25 is connected to one end of the connecting rod 11.

[0038] A cylinder 26 is detachably installed inside the junction box 1. A piston rod 27 is connected to the output end of the cylinder 26. One end of the piston rod 27 is detachably connected to one end of the limiting sleeve 15.

[0039] The top of the junction box 1 is detachably equipped with a cover plate 28.

[0040] More specifically, when only clamping or adjusting a single group of cables or a portion of the cables is required, first, simultaneously open the cylinder 26 located on the outside of the cable clamping device that does not require adjustment. Then, the cylinder 26 drives the piston rod 27 to move forward, causing the piston rod 27 to push the limiting sleeve 15 to slide. The inner wall of the limiting sleeve 15 then no longer limits the outer side of the limiting block 16. The push spring 17 then pushes the limiting block 16 outward, which in turn causes the locking rod 18 to slide outward, preventing one end of the locking rod 18 from being inserted into the locking groove 19. Then, following the previous procedure, open the motor 10 to adjust the other groups of cables. After adjustment, reverse the drive of the cylinder 26, causing... The cylinder 26 drives the limiting sleeve 15 to slide and reset via the piston rod 27 at the output end. Since the chamfered structure of the inner wall of the limiting sleeve 15 matches the chamfered structure of the outer side of the limiting block 16, the limiting sleeve 15 will gradually press the limiting block 16 inward, causing the limiting block 16 to drive the locking rod 18 to slide inward and gradually insert the locking rod 18 into the corresponding locking groove 19. At the same time, the limiting block 16 will again compress the push spring 17 sleeved on the outer side of the locking rod 18. When the push spring 17 is compressed to the limit, the limiting block 16 is completely pressed into the inner side of the limiting sleeve 15, and then the cylinder 26 is closed. This allows for flexible switching between different modes and flexible adjustment and clamping of different groups of cables.

[0041] In summary, when the entire device is in use or operation: First, ensure that all limiting sleeves 15 press the limiting blocks 16 inwards. Then, open the motor 10 installed inside the junction box 1. After being reduced in speed by the reduction gearbox 25, the output of the motor 10 drives the connecting rod 11 to rotate. The connecting rod 11 then drives multiple worm gears 13 to rotate synchronously. These worm gears 13 then synchronously drive the worm wheels 14 that work with them to rotate. The worm wheels 14 then drive all rotating sleeves 12 to rotate. The rotating sleeves 12 then pass through... The locking rod 18 and the locking groove 19 work together to rotate the control sleeve 3. The control sleeve 3 then rotates the inner sliding sleeve 9 through the cooperation of the guide rail 23 and the guide groove 24. The sliding sleeve 9 then rotates the outer slider 8, which slides along the spiral groove 7. Due to the special structural design of the spiral groove 7, the slider 8 drives the sliding sleeve 9 to slide backward. The cooperating spring 22 on one side of the cooperating plate 21 pushes the wire harness block 6 to slide. The wire harness block 6 then drives the guide plate 5 on one side to slide along the guide groove 4. Due to the special structure of the guide plate 5 and the guide groove 4... The inclined structure design allows the guide plate 5 to move the cable bundle 6 outwards, then the cables are threaded into the cable box 1, passing through the control sleeve 3, sliding sleeve 9, and fixed sleeve 2. After threading, the motor 10 reverses. The output of the motor 10, after being reduced in speed by the reduction gearbox 25, drives the connecting rod 11 and worm gear 13 to reverse. Then, through the cooperation of the worm gear 13 and worm wheel 14, multiple rotating sleeves 12 rotate. The rotating sleeves 12, through the cooperation of the locking rod 18 and locking groove 19, drive the control sleeve 3 to rotate in the opposite direction. 3. The sliding sleeve 9 is driven to rotate in the opposite direction by the cooperation of the guide rail 23 and the guide groove 24. Then, the sliding sleeve 9 slides and resets along the guide rail 23 and the guide groove 24 by the cooperation of the slider 8 and the spiral groove 7. Then, the sliding sleeve 9 pushes the cable bundle block 6 to slide. Then, the cable bundle block 6 drives the guide plate 5 and the guide groove 4 to slide in the opposite direction. Then, the guide plate 5 drives the cable bundle block 6 to move inward, so that the cable bundle block 6 can stably clamp the cable on the inner side by the rubber strip 20 set on the inner side. After the cable bundle block 6 clamps and fixes the cable by the rubber strip 20, the motor 10 can be turned off.

[0042] When only clamping or adjusting a single group or a portion of the cables is required, first simultaneously open the cylinder 26 located on the outside of the cable clamping device that does not require adjustment. Then, the cylinder 26 drives the piston rod 27 to move forward, causing the piston rod 27 to push the limiting sleeve 15 to slide. The inner wall of the limiting sleeve 15 then no longer limits the outer side of the limiting block 16. The push spring 17 then pushes the limiting block 16 outward, which in turn causes the locking rod 18 to slide outward, preventing one end of the locking rod 18 from being inserted into the locking groove 19. Then, following the previous procedure, open the motor 10 to adjust the other groups of cables. After adjustment, reverse the drive of the cylinder 26, causing the cylinder... 26 The piston rod 27 set at the output end drives the limiting sleeve 15 to slide and reset. Since the chamfered structure of the inner wall of the limiting sleeve 15 is compatible with the chamfered structure of the outer side of the limiting block 16, the limiting sleeve 15 will gradually press the limiting block 16 inward, so that the limiting block 16 drives the locking rod 18 to slide inward and gradually insert the locking rod 18 into the corresponding locking groove 19. At the same time, the limiting block 16 will again squeeze the push spring 17 sleeved on the outer side of the locking rod 18. When the push spring 17 is squeezed to the limit, the limiting block 16 is completely pressed into the inner side of the limiting sleeve 15, and then the cylinder 26 is closed. This allows for flexible switching between different modes and flexible adjustment and clamping of different groups of cables.

[0043] Of all the solutions mentioned above, those involving the connection between two components can be selected according to the actual situation, such as welding, bolt and nut connection, bolt or screw connection, or other known connection methods, which will not be elaborated here. For all the fixed connections mentioned above, welding is preferred. Although embodiments of this utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this utility model. The scope of this utility model is defined by the appended claims and their equivalents.

Claims

1. A junction box for a frequency converter cabinet, comprising a junction box (1), characterized in that: A wire clamping device is provided inside the wire box (1). The wire clamping device includes a fixed sleeve (2), a control sleeve (3), a guide groove (4), a guide plate (5), a wire bundle block (6), a spiral groove (7), a slider (8), and a sliding sleeve (9). The control sleeve (3) is connected to one end of the fixed sleeve (2). The guide groove (4) is opened in the fixed sleeve (2). The guide plate (5) is connected to one side of the wire bundle block (6). The spiral groove (7) is opened in the fixed sleeve (2). The slider (8) is connected to the outside of the sliding sleeve (9). A driving device is provided inside the wire box (1). The driving device includes a motor (10), a connecting rod (11), a rotating sleeve (12), a worm (13), and a worm wheel (14). The motor (10) is installed inside the junction box (1), the worm (13) is installed on the connecting rod (11), the worm wheel (14) is installed on the outside of the rotating sleeve (12), and a switching device is provided inside the junction box (1). The switching device includes a limiting sleeve (15), a limiting block (16), a push spring (17), a locking rod (18), and a locking groove (19). The limiting sleeve (15) is fitted on the outside of the rotating sleeve (12), the limiting block (16) is connected to one end of the locking rod (18), the two ends of the push spring (17) are connected to the outer wall of the rotating sleeve (12) and one side of the limiting block (16), the locking rod (18) is set on the side wall of the rotating sleeve (12), and multiple locking grooves (19) are opened on the outer wall of the control sleeve (3).

2. A junction box for a frequency converter cabinet according to claim 1, characterized in that: Both the guide plate (5) and the guide groove (4) are designed with an inclined structure.

3. A junction box for a frequency converter cabinet according to claim 2, characterized in that: A rubber strip (20) is connected to one side of the wire harness block (6).

4. A junction box for a frequency converter cabinet according to claim 3, characterized in that: A mating plate (21) is fixedly provided inside the fixed sleeve (2). A mating spring (22) is connected to one side of the mating plate (21), and the other end of the mating spring (22) is connected to one end of the wire harness block (6).

5. A junction box for a frequency converter cabinet according to claim 1, characterized in that: The control sleeve (3) is fixedly provided with a guide rail (23), and the sliding sleeve (9) is provided with a guide groove (24) on the outside, and the guide groove (24) is adapted to the guide rail (23).

6. A junction box for a frequency converter cabinet according to any one of claims 1-5, characterized in that: The junction box (1) is detachably equipped with a speed reduction gearbox (25). The input end of the speed reduction gearbox (25) is connected to the output end of the motor (10), and the output end of the speed reduction gearbox (25) is connected to one end of the connecting rod (11).

7. A junction box for a frequency converter cabinet according to claim 1, characterized in that: A cylinder (26) is detachably provided inside the junction box (1). A piston rod (27) is connected to the output end of the cylinder (26). One end of the piston rod (27) is detachably connected to one end of the limiting sleeve (15).

8. A junction box for a frequency converter cabinet according to claim 7, characterized in that: The top of the junction box (1) is detachably equipped with a cover plate (28).

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