Junction box for crane

Abstract

The invention discloses a junction box for a crane, and relates to the technical field of junction boxes, the junction box comprises a junction box body and a plurality of connecting cylinders mounted on the two sides of the junction box body, and further comprises fixing assemblies mounted in the connecting cylinders, and then a cable is continuously pushed to drive a fixing plate, a lantern ring and a lifting plate to move; after the lifting plate slides in the lifting groove to make contact with the conical cylinder, the conical cylinder is pushed to slide in the sliding groove along with movement of the cable, when the conical cylinder moves, the rotating blocks on the periphery of the conical cylinder ascend along with the conical cylinder to rotate on the periphery of the positioning rod and extrude the torsional spring, the rotating blocks are tightly attached to the outer surface of the conical cylinder through the elastic force of the torsional spring, and meanwhile the two rotating blocks rotate relatively; the friction block is used for clamping and fixing the cable, the rising distance of the conical cylinder is different, the rotating angle of the rotating block is different, fixing of cables of different sizes can be achieved, the longer the pushing distance is, the larger the rotating angle is, the smaller the cable of the size can be fixed, and on the contrary, the shorter the pushing distance is, the smaller the rotating angle is, and the larger cable of the size can be fixed.

Description

Technical Field

[0001] The present invention relates to the technical field of distribution boxes, and particularly to a distribution box for a crane. Background Art

[0002] As an engineering mechanical equipment convenient for cross-regional operation, truck-mounted cranes have significant flexibility and applicability. Some truck-mounted cranes are also equipped with a remote control function. The application of this function effectively improves the operation stability and efficiency, making the operation more accurate and efficient. To achieve the remote control of the truck-mounted crane, it is necessary to comprehensively and carefully collect data on its working parts to timely master the working status of the equipment and then adjust the control instructions in a timely manner. For this reason, multiple data collection devices are equipped on the truck-mounted crane, and signal transmission cables are correspondingly set for data collection and transmission.

[0003] To uniformly control and supply power to the signal transmission cables, a distribution box is usually provided at the boom part of the truck-mounted crane. The distribution box plays a key role in signal integration and power supply in the system and is an important component to ensure the stable operation of the remote control system.

[0004] However, the distribution boxes in the prior art still have certain problems in actual applications. Although they can meet the installation requirements of multiple cables, during the operation of the crane, especially when operating under heavy load or at high speed, the strong vibration generated by the boom will affect the cables in the distribution box. Specifically, the vibration may cause the cable joints to loosen or shift, and at the same time, the long-term vibration will also gradually loosen the cable fixing devices, resulting in a decrease in the contact pressure between the cables and the terminals, and finally causing faults such as poor contact, affecting the stability and reliability of data transmission. Summary of the Invention

[0005] The purpose of the present invention is to propose a solution to solve the problem that during the operation of the crane, especially when operating under heavy load or at high speed, the strong vibration generated by the boom will affect the cables in the distribution box. Specifically, the vibration may cause the cable joints to loosen or shift, and at the same time, the long-term vibration will also gradually loosen the cable fixing devices, resulting in a decrease in the contact pressure between the cables and the terminals, and finally causing faults such as poor contact, affecting the stability and reliability of data transmission.

[0006] To achieve the above purpose, the present invention adopts the following technical solution: A distribution box for a crane, comprising a distribution box body and a plurality of connecting cylinders installed on both sides of the distribution box body, and further comprising: a fixing component installed inside the connecting cylinder;

[0007] The fixed component includes a clamping member slidably connected in the connecting cylinder through a lifting groove. A tapered cylinder is slidably connected inside the connecting cylinder through a sliding groove, and the tapered cylinder is in contact with the clamping member. A plurality of connecting blocks are fixedly connected to the inner wall of the connecting cylinder. A positioning rod is fixedly connected between every two connecting blocks. A rotating block is rotatably connected to the outer periphery of the positioning rod, and the rotating block abuts against the surface of the tapered cylinder;

[0008] The clamping member clamps the cable. As the cable moves into the inside of the distribution box body, the clamping member pushes the tapered cylinder to move, and makes the rotating block rotate on the outer periphery of the positioning rod. As the distance that the clamping member pushes the tapered cylinder to move is farther, the fixing of the rotating block to the cable is tighter.

[0009] As a further description of the above technical solution:

[0010] The fixed component further includes a torsion spring connected between the positioning rod and the rotating block. A friction block in contact with the cable is fixedly connected to the outer periphery of the rotating block.

[0011] As a further description of the above technical solution:

[0012] A plurality of protruding particles in contact with the tapered cylinder are fixedly connected to the inner wall of the sliding groove.

[0013] As a further description of the above technical solution:

[0014] The clamping member includes two lifting grooves opened in the connecting cylinder. A lifting plate is slidably connected to the inner wall of the lifting groove. A collar is installed inside the lifting plate. A plurality of fixing columns are fixedly connected to the inner wall of the collar. A limiting plate is fixedly connected to one side of the fixing column. A telescopic spring is sleeved on the outer periphery of the fixing column. A dial plate extending out of the connecting cylinder is connected to the outer periphery of the fixing column through a slidable fixing plate.

[0015] As a further description of the above technical solution:

[0016] The contact part of the fixing plate and the cable is serrated.

[0017] As a further description of the above technical solution:

[0018] A limiting component is connected between the positioning rod and the rotating block. The limiting component includes a plurality of clamping blocks fixedly connected to the outer periphery of the positioning rod. An installation frame is fixedly connected to the inner wall of the rotating block. An installation rod is fixedly connected between the inner walls of the installation frame. An abutting block in contact with the clamping block is rotatably connected to the outer periphery of the installation rod. A spring piece and a limiting block in contact with the abutting block are fixedly connected to the inner wall of the rotating block.

[0019] As a further description of the above technical solution:

[0020] A pressing assembly is installed inside the connecting cylinder. The pressing assembly includes an avoidance groove and a moving groove opened inside the connecting cylinder. An annular groove connected to the moving groove is opened inside the connecting cylinder.

[0021] As a further description of the above technical solution:

[0022] The pressing assembly also includes a pressing block fixedly connected to the outer periphery of the rotating block, and a moving block slidably connected to the inner wall of the moving groove. The bottom of the moving block is fixedly connected to an annular lower pressing plate, and a sealing ring is placed at the bottom of the lower pressing plate.

[0023] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0024] The two toggle plates are pushed apart to both sides by the provided fixing assembly and the limiting assembly. When being pushed, the fixing plates are driven to slide along the outer periphery of the fixing columns and squeeze the telescopic springs. When the gap between the two fixing plates is enough for the cable to pass through, the cable is pushed into the junction box body along the gap to a suitable position. The toggle plates are released, and the telescopic springs rebound and push the fixing plates close to the outer periphery of the cables. After manual adjustment, the fixing plates are firmly embedded in the cables to complete the cable clamping and fixing. Then, the cables are continuously pushed to drive the fixing plates, the collars and the lifting plates to move. After the lifting plates slide in the lifting grooves until they contact the cones, the cones are pushed on the sliding surface as the cables move. When the cone moves, the rotating block on its outer periphery rotates around the positioning rod as the cone rises and squeezes the torsion spring. The rotating block is pressed against the outer surface of the cone by the elastic force of the torsion spring. At the same time, the two rotating blocks rotate relative to each other, and the friction block is used to clamp and fix the cable. The cone rises at different distances and the rotating block rotates at different angles, so cables of different sizes can be fixed. The longer the pushing distance and the larger the rotation angle, the smaller the cable can be fixed. On the contrary, the shorter the pushing distance and the smaller the rotation angle, the larger the cable can be fixed, which improves the fixation of the main cable and the branch cable and the stability of the branch line.

[0025] When the rotating block rotates, several clamping blocks push the abutment block to rotate along the outer circumference of the mounting rod and squeeze the spring sheet. After the abutment block disengages from the clamping block, the spring sheet resets and pushes the abutment block to rotate until it contacts the limiting block, preventing the rotating block from resetting under the action of the torsion spring. When the cable is pulled downward by an external force, the friction between the friction block and the cable drives the two rotating blocks to rotate further, so that the friction block clamps the cable more tightly. The greater the cable pulling amplitude, the higher the clamping degree. At the same time, the rotation of the rotating block changes the relative position of the abutment block and the clamping block, preventing the rotating block from rotating, so that the friction block always maintains a highly clamped state, thereby improving the cable fixing effect and preventing loosening. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 The overall structural diagram of the present invention is shown;

[0027] Figure 2A schematic diagram of the connecting tube structure of the present invention is shown;

[0028] Figure 3 A schematic diagram of the internal structure of the connecting tube of the present invention is shown;

[0029] Figure 4 A cross-sectional view of a connecting tube of the present invention is shown;

[0030] Figure 5 A schematic diagram of the structure of the fixing assembly of the present invention is shown;

[0031] Figure 6 A schematic diagram of the structure of the rotating block of the present invention is shown;

[0032] Figure 7 A cross-sectional view of the rotating block of the present invention is shown;

[0033] Figure 8 The present invention is shown Figure 7 A partial enlarged view of the middle part;

[0034] Figure 9 A schematic diagram of the structure of the pressing assembly of the present invention is shown.

[0035] Legend:

[0036] 10. Junction box body; 11. Connecting tube;

[0037] 20. Fixed assembly; 21. Lifting slot; 22. Ring; 221. Lifting plate; 222. Fixed column; 223. Limiting plate; 224. Telescopic spring; 225. Fixed plate; 226. Toggle plate; 23. Slide; 24. Cone; 25. Connecting block; 251. Positioning rod; 252. Rotating block; 253. Torsion spring; 254. Friction block;

[0038] 30. Limiting assembly; 31. Clamping block; 32. Mounting frame; 321. Mounting rod; 322. Abutting block; 323. Spring sheet; 324. Limiting block;

[0039] 40. Pressure-receiving assembly; 41. Avoidance groove; 42. Pressure-receiving block; 43. Moving groove; 431. Slot; 432. Moving block; 433. Lower pressure plate; 434. Sealing ring. DETAILED DESCRIPTION

[0040] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 creative work are within the scope of protection of the present invention.

[0041] likeFigures 1-9 As shown, the present invention provides a junction box for a crane: comprising a junction box body 10 and a plurality of connecting tubes 11 installed on both sides of the junction box body 10, and also comprising: a fixing assembly 20 installed inside the connecting tube 11, the fixing assembly 20 comprising a clamping member slidably connected to the connecting tube 11 through a lifting groove 21, the clamping member comprising two lifting grooves 21 provided in the connecting tube 11, the inner wall of the lifting groove 21 being slidably connected with a lifting plate 221, the inner wall of the lifting groove 21 being provided with a sleeve 22, the inner wall of the sleeve 22 being fixedly connected with a plurality of fixing columns 222, and one side of the fixing column 222 being fixedly connected with a limiting plate 223, the outer periphery of the fixing column 222 being sleeved with a telescopic spring 224, the outer periphery of the fixing column 222 being connected with a toggle plate 226 extending out of the connecting tube 11 through a fixing plate 225 slidably connected, and the contact portion between the fixing plate 225 and the cable is set to be serrated;

[0042] When the cable needs to be installed inside the junction box body 10, first push the two toggle plates 226 to both sides. During the toggle process, the toggle plates 226 will drive the fixed plates 225 to slide along the outer periphery of the fixed column 222, and at the same time produce an extrusion effect on the telescopic spring 224. When the gap between the two fixed plates 225 is expanded to be large enough to accommodate the cable passing through, the cable is pushed into the junction box body 10 along the gap. After being pushed to the appropriate position, the two toggle plates 226 are released. At this time, the telescopic spring 224 in a compressed state begins to rebound, pushing the fixed plates 225 close to the outer periphery of the cable. Subsequently, through manual adjustment, the two fixed plates 225 are firmly embedded in the cable surface, thereby achieving clamping and fixing of the cable.

[0043] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 As shown, the interior of the connecting cylinder 11 is slidably connected to a cone cylinder 24 through a slide groove 23, and the cone cylinder 24 is in contact with the clamping member, a plurality of connecting blocks 25 are fixedly connected to the inner wall of the connecting cylinder 11, a positioning rod 251 is fixedly connected between every two connecting blocks 25, a rotating block 252 is rotatably connected to the outer periphery of the positioning rod 251, the rotating block 252 abuts against the surface of the cone cylinder 24, a torsion spring 253 is provided between the positioning rod 251 and the rotating block 252, a friction block 254 in contact with the cable is fixedly connected to the outer periphery of the rotating block 252, and a plurality of protruding particles in contact with the cone cylinder 24 are fixedly connected to the inner wall of the slide groove 23;

[0044] After the two fixing plates 225 complete the clamping operation on the cable, the cable can be continuously pushed. At this time, the cable will drive the fixing plates 225 to move synchronously. As the fixing plates 225 move, the collar 22 connected to them will also move accordingly, thereby driving the lifting plate 221 to slide in the lifting groove 21. When the lifting plate 221 moves a certain distance in the lifting groove 21, it will contact the conical cylinder 24. As the cable continues to move, the lifting plate 221 will push the conical cylinder 24 to slide in the sliding groove 23;

[0045] During the movement of the conical cylinder 24, the rotating block 252 against the outer periphery of the conical cylinder 24 will rotate around the outer periphery of the positioning rod 251 as the conical cylinder 24 rises, rotate towards the cable direction, and at the same time exert a squeezing effect on the torsion spring 253. Through the elastic force of the torsion spring 253, the rotating block 252 is always kept close to the outer surface of the conical cylinder 24. At the same time, through the relative rotation of the two rotating blocks 252, the friction blocks 254 on the rotating blocks 252 are used to complete the clamping and fixing of the cable. At this time, the cable that has extended into the inside of the distribution box body 10 can be connected to the electronic components;

[0046] In addition, as the conical cylinder 24 rises, the rotating block 252 can fix cables of different sizes within a certain size range. Specifically, according to the pushing distance of the conical cylinder 24, when the conical cylinder 24 is pushed a longer distance, the rotation angle of the two rotating blocks 252 is larger, so that cables with smaller sizes can be clamped and fixed. On the contrary, when the conical cylinder 24 is pushed a shorter distance, the rotation angle of the two rotating blocks 252 is smaller, and cables with larger sizes can be clamped and fixed;

[0047] Through the above method, the fixing of the main cable and the branch cable is improved, and the stability of wire splitting is improved.

[0048] Such as Figure 1 、 Figure 6 、 Figure 7 、 Figure 8 As shown, a limiting component 30 is connected between the positioning rod 251 and the rotating block 252. The limiting component 30 includes a plurality of clamping blocks 31 fixedly connected to the outer periphery of the positioning rod 251. The inner wall of the rotating block 252 is fixedly connected with a mounting frame 32, and a mounting rod 321 is fixedly connected between the inner walls of the mounting frame 32. A contact block 322 that contacts the clamping block 31 is rotatably connected to the outer periphery of the mounting rod 321. The inner wall of the rotating block 252 is fixedly connected with a spring piece 323 and a limiting block 324 that contact the contact block 322;

[0049] During the rotation of the rotating block 252 around the outer periphery of the positioning rod 251, several clamping blocks 31 will push the abutting block 322 to rotate along the outer periphery of the mounting rod 321, and at the same time exert a squeezing effect on the spring piece 323. When the abutting block 322 disengages from the contact with the clamping block 31, the spring piece 323 in the compressed state will reset and push the abutting block 322 to rotate back to the position where it contacts the limiting block 324, thus effectively preventing the rotating block 252 from resetting under the action of the torsion spring 253;

[0050] In addition, since the two rotating blocks 252 clamp the cable in a clamped state, when the cable is pulled by an external force, the cable will move downward, and then drive the two rotating blocks 252 to further rotate around the outer periphery of the positioning rod 251 through the frictional force between the friction block 254 and the cable. This rotation action will cause the two rotating blocks 252 to drive the friction block 254 to clamp the cable more tightly. The greater the amplitude of the cable pulled by the external force, the higher the clamping degree of the two friction blocks 254 on the cable. At the same time, as the rotating block 252 rotates, the relative position between the abutting block 322 and the clamping block 31 will change, thereby preventing the rotating block 252 from rotating back, so that the two friction blocks 254 always maintain a high clamping state. This design significantly improves the fixing effect on the cable and effectively prevents the cable from loosening.

[0051] As Figure 1 、 Figure 3 、 Figure 4 、 Figure 9 As shown, a pressing component 40 is installed inside the connecting cylinder 11. The pressing component 40 includes an avoidance groove 41 and a moving groove 43 opened inside the connecting cylinder 11. An annular slot 431 communicating with the moving groove 43 is opened inside the connecting cylinder 11. The pressing component 40 further includes a pressing block 42 fixedly connected to the outer periphery of the rotating block 252, and a moving block 432 slidably connected to the inner wall of the moving groove 43. A ring-shaped lower pressing plate 433 is fixedly connected to the bottom of the moving block 432, and a sealing ring 434 is placed at the bottom of the lower pressing plate 433;

[0052] During the rotation of the rotating block 252 around the outer periphery of the positioning rod 251, the pressing block 42 on its outer periphery will push the moving block 432 to move in the moving groove 43. As the moving block 432 descends, the moving block 432 will drive the lower pressing plate 433 to exert pressure on the sealing ring 434, increasing the lateral area of the sealing ring 434, thereby improving the fit with the cable and enhancing the sealing effect. In addition, since the lateral area of the sealing ring 434 increases, it can also exert a certain clamping effect on the cable, further improving the fixing of the cable.

[0053] Working principle: Push the two toggle plates 226 to both sides. When toggling, drive the fixed plate 225 to slide along the outer periphery of the fixed column 222 and compress the telescopic spring 224. When the gap between the two fixed plates 225 is large enough for the cable to pass through, push the cable along this gap into the distribution box body 10 to the appropriate position, then release the toggle plate 226. The telescopic spring 224 rebounds to push the fixed plate 225 to closely adhere to the outer periphery of the cable. Then, through manual adjustment, make the fixed plate 225 firmly embed into the cable to complete the clamping and fixing of the cable;

[0054] After the two fixed plates 225 complete clamping, continue to push the cable, driving the fixed plate 225, the collar 22 and the lifting plate 221 to move. The lifting plate 221 slides in the lifting groove 21 until it contacts the conical cylinder 24, and then drives the conical cylinder 24 to slide in the sliding groove 23 as the cable moves. When the conical cylinder 24 moves, the rotating block 252 on its outer periphery rises along the outer periphery of the positioning rod 251 and rotates while squeezing the torsion spring 253. Due to the elastic force of the torsion spring 253, the rotating block 252 closely adheres to the outer surface of the conical cylinder 24. At the same time, the two rotating blocks 252 rotate relative to each other, and the cable is clamped and fixed by using the friction block 254. At this time, the cable can be connected to the electronic components, and the rising distance of the conical cylinder 24 is different, and the rotation angle of the rotating block 252 is different, so that cables of different sizes can be fixed. The longer the pushing distance, the larger the rotation angle, and the smaller the cable size that can be fixed;

[0055] When the rotating block 252 rotates, several clamping blocks 31 push the abutting block 322 to rotate along the outer periphery of the mounting rod 321 and squeeze the spring piece 323. After the abutting block 322 disengages from the clamping block 31, the spring piece 323 resets to push the abutting block 322 to rotate back until it contacts the limiting block 324, preventing the rotating block 252 from resetting under the action of the torsion spring 253;

[0056] When the cable is pulled downward by an external force, the two rotating blocks 252 are further rotated by the friction force between the friction block 254 and the cable, so that the friction block 254 clamps the cable more tightly. The greater the pulling amplitude of the cable, the higher the clamping degree. At the same time, the rotation of the rotating block 252 changes the relative position between the abutting block 322 and the clamping block 31, preventing the rotating block 252 from rotating back, so that the friction block 254 always maintains a high clamping state, improving the cable fixing effect and preventing loosening;

[0057] When the rotating block 252 rotates, the pressing block 42 on its outer periphery pushes the moving block 432 to move in the moving groove 43. The descending of the moving block 432 drives the lower pressing plate 433 to apply pressure to the sealing ring 434, increasing the lateral area of the sealing ring 434, improving the fit with the cable, enhancing the sealing effect, and at the same time exerting a certain clamping effect on the cable, further improving the cable fixing property.

[0058] The above are only the preferred specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, making equivalent substitutions or changes should be covered within the protection scope of the present invention.

Claims

1. A distribution box for a crane, comprising a distribution box body (10) and a plurality of connecting cylinders (11) installed on both sides of the distribution box body (10), characterized in that, It also includes: a fixing assembly (20) installed inside the connecting cylinder (11); The fixing assembly (20) comprises a clamping member slidably connected to the connecting cylinder (11) via a lifting groove (21); the interior of the connecting cylinder (11) is slidably connected to a cone cylinder (24) via a sliding groove (23), and the cone cylinder (24) is in contact with the clamping member; a plurality of connecting blocks (25) are fixedly connected to the inner wall of the connecting cylinder (11); a positioning rod (251) is fixedly connected between every two connecting blocks (25); the outer periphery of the positioning rod (251) is rotatably connected to a rotating block (252), and the rotating block (252) abuts against the surface of the cone cylinder (24); The clamping member clamps the cable, and as the cable moves into the inside of the junction box body (10), the clamping member abuts against the cone cylinder (24) to move, and causes the rotating block (252) to rotate on the outer circumference of the positioning rod (251); as the clamping member abuts against the cone cylinder (24) to move a greater distance, the rotating block (252) fixes the cable more tightly.

2. The distribution box for a crane according to claim 1, wherein The fixing assembly (20) further comprises a torsion spring (253) connected between the positioning rod (251) and the rotating block (252); a friction block (254) in contact with the cable is fixedly connected to the outer periphery of the rotating block (252).

3. The distribution box for a crane according to claim 1, characterized in that, A plurality of protruding particles in contact with the cone (24) are fixedly connected to the inner wall of the slide groove (23).

4. The distribution box for a crane according to claim 1, wherein, The clamping member comprises two lifting grooves (21) provided in the connecting tube (11); the inner wall of the lifting groove (21) is slidably connected to a lifting plate (221); a collar (22) is installed inside the lifting plate (221); a plurality of fixing columns (222) are fixedly connected to the inner wall of the collar (22); one side of the fixing column (222) is fixedly connected to a limiting plate (223); a telescopic spring (224) is sleeved on the outer periphery of the fixing column (222); and the outer periphery of the fixing column (222) is connected to a toggle plate (226) extending out of the connecting tube (11) via a fixing plate (225) slidably connected thereto.

5. The distribution box for a crane according to claim 4, characterized in that, The contact portion between the fixing plate (225) and the cable is configured to be sawtooth-shaped.

6. The distribution box for a crane according to claim 1, characterized in that, A limit assembly (30) is connected between the positioning rod (251) and the rotating block (252), the limit assembly (30) comprising a plurality of clamping blocks (31) fixedly connected to the outer periphery of the positioning rod (251), a mounting frame (32) fixedly connected to the inner wall of the rotating block (252), a mounting rod (321) fixedly connected between the inner walls of the mounting frame (32), an abutment block (322) in contact with the clamping block (31) rotatably connected to the outer periphery of the mounting rod (321), and a spring sheet (323) in contact with the abutment block (322) and a limit block (324) fixedly connected to the inner wall of the rotating block (252).

7. The distribution box for a crane according to claim 1, characterized in that, A pressing assembly (40) is installed inside the connecting cylinder (11), and the pressing assembly (40) comprises an avoidance groove (41) and a moving groove (43) provided inside the connecting cylinder (11). An annular groove (431) communicating with the moving groove (43) is provided inside the connecting cylinder (11).

8. The distribution box for a crane according to claim 7, characterized in that, The pressing assembly (40) further includes a pressing block (42) fixedly connected to the outer periphery of the rotating block (252), and a moving block (432) slidably connected to the inner wall of the moving groove (43). A circular lower pressing plate (433) is fixedly connected to the bottom of the moving block (432), and a sealing ring (434) is placed at the bottom of the lower pressing plate (433).

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