Tester for electrical control box of cross-country scissor-type forklift

Abstract

The invention, which relates to the technical field of software and information, discloses a tester for an electrical control box of a cross-country scissor-type forklift, the tester comprises an electrical box, an extension groove is internally provided with a take-up mechanism for taking up a connecting wire, and the extension groove is internally provided with a power supply. One side of the take-up mechanism is provided with a clamping mechanism for controlling the motion state of the take-up mechanism, one side of the take-up mechanism is provided with a power mechanism for providing power for the take-up mechanism, and when a test is completed, a clamping pawl rotates around a main body shaft and is separated from a rotation path of a clamping circular plate helical tooth block; at the moment, the clamping circular plate rotates under the release effect of the take-up spring, so that the unwound connecting wire is wound, a tester does not need to spend time in disassembling the control box, only needs to pull out the cable with the required length to be connected to the tester, and can take up and fix the cable instantly through the take-up mechanism after the test is completed. And the preparation and ending time is greatly shortened.

Description

Technical Field

[0001] This invention relates to the field of software and information technology, specifically to a tester for the electrical control box of an off-road scissor lift. Background Technology

[0002] The off-road scissor lift electrical control box tester is a specialized portable diagnostic device. Its core function is to simulate the actual working conditions of the forklift, enabling quick and accurate detection and judgment of whether the electrical control box on the scissor lift is functioning properly. In maintenance or production processes, it replaces external units such as sensors, operating switches, and power supplies on the forklift itself, connecting directly to the electrical control box and sending a series of simulated commands and loads to it, thereby verifying the control box's logic function, output response, and load-bearing capacity.

[0003] Technicians securely connect the dedicated cable connector of the tester to the corresponding interface of the electrical control box under test, and turn on the power of the tester. The operator sends command signals to the control box simulating the real working conditions of an off-road scissor forklift through various switches, buttons and simulation devices on the tester panel, such as platform lifting, engine start, travel drive, steering and lights. By comparing whether the output signal of the control box is within the preset normal range and logical sequence after receiving a specific input signal, the technicians can efficiently determine whether the control box is functional, has a potential fault, or has completely failed, thus completing the rapid diagnosis and performance verification of the control box when it is detached from the vehicle.

[0004] The tester has significant problems in complex repair sites, such as the cables being easily damaged and insufficient length affecting operation. This necessitates adjusting the position of the electrical box, which requires disassembling the box. Furthermore, adjusting the electrical box position can lead to inaccurate test data and loose power connections, slowing down test preparation and completion efficiency and affecting test data. Summary of the Invention

[0005] Technical problems to be solved To address the shortcomings of existing technologies, this invention provides an electrical control box tester for off-road scissor lifts, which solves the problems mentioned in the background section.

[0006] Technical solution To achieve the above objectives, the present invention provides the following technical solution: an electrical control box tester for off-road scissor lifts, comprising an electrical box, wherein the interior of the electrical box is provided with a placement slot, an extension slot, and a protrusion slot sequentially from top to bottom; a sealing plate is fixedly mounted on the surface of the electrical box by bolts; multiple electronic components are symmetrically arranged inside the extension slot, with the electronic components in the same row connected in series; a connecting wire is provided on the lower surface of the bottom electronic component; the connecting wire extends through the extension slot to the interior of the protrusion slot; one end of the connecting wire is provided with a wound wire; one end of the wound wire is provided with an extension connector; a connecting connector is snapped into the interior of the extension connector; and a tester is fixedly connected to one end of the connecting connector. The surface of the extension groove is provided with a sealing mechanism to protect the internal extension joint, and the inside of the extension groove is provided with a wire take-up mechanism to gather the connecting wires. A speed limiting mechanism is provided on one side of the wire take-up mechanism to limit the speed of the wire take-up mechanism.

[0007] Preferably, the sealing mechanism includes a sliding plate slidably connected to the surface of the electrical box. The sliding plate is located on the surface of the extension groove. Both ends of the sliding plate near the electrical box are fixedly connected to a power side plate. The power side plate is L-shaped. Vertical guide grooves are provided on both inner walls of the extension groove. The lateral portion of the power side plate extends into the interior of the adjacent vertical guide groove.

[0008] Preferably, the take-up mechanism includes two cable reels symmetrically arranged inside the extension groove. Two support blocks are symmetrically arranged inside the extension groove. A side rotating frame is provided on the side of the cable reel near the support block. The side rotating frame is rotatably connected to the surface of the support block adjacent to it. A locking circular plate is fixedly connected to the side of the side rotating frame away from the support block. A locking shaft is fixedly connected to one side of the locking circular plate. A support groove is formed in the inner wall of the extension groove. The locking shaft extends into the support groove and is rotatably connected to the support groove. A connecting mechanism is provided inside the support block.

[0009] Preferably, the connecting mechanism includes a wire groove formed inside the cable reel, and a connecting groove is formed inside the support block. The wire groove is L-shaped, and the vertical part of the wire groove extends from the cavity formed by the positioning circular plate and the cable reel to the center line of the cable reel. The horizontal part of the wire groove is formed along the center line of the cable reel towards the support block, and the horizontal part of the wire groove is connected to the connecting groove.

[0010] Preferably, a slip ring stator is fixedly connected inside the connecting groove, and a slip ring rotor is provided inside the slip ring stator. One end of the wound wire extends through the wire groove into the interior of the connecting groove. The wound wire is electrically connected to the slip ring rotor. Multiple fixed connecting wires extend from the interior of the slip ring stator. The connecting wire is connected to the multiple fixed connecting wires. A power mechanism is provided on the side of the locking plate away from the support block.

[0011] Preferably, the power mechanism includes symmetrically formed extension circular grooves on the inner wall of the extension grooves. A circular frame is fixedly connected inside each of the two extension circular grooves. A take-up spring is provided inside the circular frame. A locking groove is formed on the inner wall of the circular frame. A protrusion is provided at one end of the take-up spring, and the protrusion extends into the locking groove. A transverse locking block is fixedly connected to one end of the take-up spring near the center line of the circular frame. A torsion groove is formed inside the locking shaft. The transverse locking block is located inside the torsion groove of the locking shaft. A locking mechanism is provided on one side of the locking circular plate.

[0012] Preferably, the locking mechanism includes a main shaft fixedly connected to the inner wall of the extension groove, a locking pawl rotatably connected to the surface of the main shaft, a plurality of helical teeth arranged in a circumferential array on the surface of the locking circular plate, the locking pawl extending into the interior of adjacent helical teeth on the surface of the locking circular plate, a spring lever fixedly connected to the inner wall of the extension groove, the spring lever being located on the rotation path of the locking pawl, actuation grooves being provided on both sides of the inner wall of the extension groove, a transverse pull rod fixedly connected to the surface of the locking pawl, the transverse pull rod passing through the actuation groove and extending out of the extension groove, and the locking pawl extending into the interior of adjacent helical teeth on the surface of the locking circular plate under the push of the spring lever.

[0013] Preferably, the speed limiting mechanism includes a limiting frame fixedly connected to the inner wall of the support groove. The inner wall of the limiting frame is arranged in a circumferential array with multiple limiting blocks. A fixed abutment is fixedly connected to the side of the locking shaft away from the locking circular plate. A fixed inclined rod is fixedly connected to the surface of the fixed abutment. An extension slide frame is slidably connected to the surface of the fixed inclined rod. A inclined spring is fixedly connected between the extension slide frame and the fixed inclined rod. A power center shaft is fixedly connected to the side of the locking shaft away from the locking circular plate. A power locking rod is rotatably connected to the surface of the power center shaft. One end of the power locking rod has an abutment groove. The end of the power locking rod with the abutment groove is slidably installed inside the extension slide frame away from the fixed abutment. A round rod is slidably connected inside the abutment groove. The round rod is fixedly connected to the extension slide frame away from the fixed abutment. A hook-locking mechanism is provided inside the limiting frame.

[0014] Preferably, the hook-lock mechanism includes a hook fixedly connected to the surface of the end of the power lever away from the extension slide frame; a connecting push rod is rotatably connected to the surface of the end of the power lever away from the extension slide frame; a connecting central shaft is fixedly connected to the side of the locking shaft away from the locking circular plate; a connecting lever is rotatably connected to the surface of the connecting central shaft; one end of the connecting lever is rotatably connected to the inside of the end of the connecting push rod away from the power lever; a hook is provided at the end of the connecting lever away from the connecting push rod; and counterweights are provided on both the hook on the surface of the power lever and the hook on the surface of the connecting lever.

[0015] Beneficial effects The off-road scissor lift electrical control box tester provided by this invention has the following beneficial effects: 1. When winding a cable reel using a winding spring, manual pulling is usually required to slowly release the cable. If the operator accidentally releases the reel, the cable reel will rotate rapidly under the winding spring's influence. The resulting centripetal force causes the connecting rod and the power rod to rotate outward around the power center axis and the connecting center axis, respectively. At this point, the limit block enters the rotation range of the connecting rod and the power rod hook. The extension slide frame then slides along the surface of the fixed inclined rod towards the fixed stop block under the thrust provided by the abutment groove. The inclined spring is compressed. As the locking shaft continues to rotate, the hook engages with the limit block, thus limiting the locking shaft and preventing it from continuing to rotate rapidly. This would cause the extension joint to swing erratically under the tension of the cable reel, resulting in collisions between parts and potential damage.

[0016] 2. When the test is completed, disconnect the extension connector from the connecting connector and manually move the horizontal pull rod. At this time, the locking pawl rotates around the main shaft and disengages from the rotation path of the locking disc helical tooth block. The locking disc rotates under the release action of the winding spring, thereby winding up the released connecting wire. The tester does not need to spend time disassembling the control box. After arriving at the test site, the tester only needs to pull out the required length of cable and connect it to the tester. After the test is completed, the cable can be instantly retracted and fixed by the winding mechanism, which greatly shortens the preparation and completion time. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the internal structure of the present invention; Figure 3 This is a schematic diagram of the inside of the protruding groove of the present invention; Figure 4 For the present invention Figure 3 A magnified view of part A in the image; Figure 5 This is a schematic diagram of the internal structure of the extension groove of the present invention; Figure 6 For the present invention Figure 5 A magnified view of part B in the image; Figure 7 This is a diagram showing the distribution of the cable reel connection structure of the present invention; Figure 8 For the present invention Figure 7 A magnified view of part C; Figure 9 This is a schematic diagram of the internal structure of the limiting frame of the present invention.

[0018] The labels in the diagram represent: 1. Electrical box; 11. Placement slot; 12. Extension slot; 13. Protrusion slot; 14. Sealing plate; 2. Electronic components; 21. Connecting wires; 22. Extension connector; 23. Tester; 24. Connecting connector; 25. Winding wire; 3. Sliding plate; 31. Power side plate; 32. Vertical guide slot; 4. Cable reel; 41. Side rotating frame; 42. Support block; 43. Positioning round plate; 44. Positioning shaft; 45. Support slot; 5. Wire slot; 51. Connecting slot; 52. Slip ring rotor; 53. Slip ring... 54. Ring stator; 6. Fixed connecting wire; 7. Extending circular groove; 8. Circular frame; 9. Winding spring; 10. Lateral locking block; 11. Locking slot; 2. Main shaft; 3. Locking pawl; 4. Spring lever; 52. Actuating groove; 63. Lateral pull rod; 74. Limiting frame; 85. Limiting locking block; 86. Fixed abutment block; 87. Fixed diagonal rod; 88. Diagonal spring; 9. Extending slide frame; 10. Abutment groove; 11. Power locking rod; 12. Power center shaft; 13. Connecting locking rod; 14. Connecting center shaft; 15. Connecting push rod. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] refer to Figures 1 to 9According to a preferred embodiment of the present invention, an electrical control box tester for an off-road scissor forklift will be described in detail below. It includes an electrical box 1. The electrical box 1 has a placement slot 11, an extension slot 12 and a protrusion slot 13 arranged sequentially from top to bottom inside. A sealing plate 14 is fixedly installed on the surface of the electrical box 1 by bolts. The sealing plate 14 seals and protects the placement slot 11 and the extension slot 12. Multiple electronic components 2 are symmetrically arranged inside the extension slot 12. The electronic components 2 located in the same row are connected in series with each other. A connecting wire 21 is provided on the lower surface of the bottom electronic component 2. The connecting wire 21 passes through the extension slot 12 and extends into the interior of the protrusion slot 13. A winding wire 25 is provided at one end of the connecting wire 21. An extension connector 22 is provided at one end of the winding wire 25. A connecting connector 24 is snapped into the interior of the extension connector 22. A tester 23 is fixedly connected to one end of the connecting connector 24. The surface of the extension slot 13 is provided with a sealing mechanism to protect the internal extension joint 22. The extension joint 22 located inside the extension slot 13 is protected by the sealing mechanism. The inside of the extension slot 12 is provided with a winding mechanism to gather the connecting wire 21. The winding mechanism gathers the wound wire 25. The length of the wound wire 25 extending outside the electrical box 1 can be adjusted according to the customer's needs. A speed limiting mechanism is provided on one side of the winding mechanism to limit the speed of the winding mechanism.

[0021] The sealing mechanism includes a sliding plate 3 that is slidably connected to the surface of the electrical box 1. The sliding plate 3 is located at the opening of the extension slot 13. The extension slot 13 is opened or closed by the sliding plate 3. Both ends of the sliding plate 3 near the electrical box 1 are fixedly connected to a power side plate 31. The power side plate 31 is L-shaped. Vertical guide grooves 32 are provided on both sides of the inner wall of the extension slot 13. The horizontal part of the power side plate 31 extends into the interior of the vertical guide groove 32 that is close to it.

[0022] The opening of the extension slot 13 is controlled by the sliding plate 3 to open or close, ensuring that the extension slot 13 is in a closed state when the electrical box 1 is not being tested, thereby protecting the extension joint 22 inside the extension slot 13.

[0023] The cable take-up mechanism includes two cable reels 4 symmetrically arranged inside the extension groove 12. Two support blocks 42 are symmetrically arranged inside the extension groove 12. A side rotating frame 41 is provided on the side of the cable reel 4 near the support block 42. The side rotating frame 41 is rotatably connected to the surface of the support block 42 nearby. A locking circular plate 43 is fixedly connected to the side of the cable reel 4 away from the support block 42. A locking shaft 44 is fixedly connected to one side of the locking circular plate 43. A support groove 45 is opened in the inner wall of the extension groove 12. The locking shaft 44 extends into the interior of the support groove 45 and is rotatably connected to the support groove 45. A connecting mechanism is provided inside the support block 42.

[0024] The cable reel 4 rotates inside the support groove 45 via the locking shaft 44, and at this time the side rotating frame 41 extends into the support block 42, thereby supporting the cable reel 4 at both ends, thus ensuring that the cable reel 4 can rotate stably.

[0025] The connecting mechanism includes a wire groove 5 opened inside the cable reel 4, and a connecting groove 51 opened inside the support block 42. The wire groove 5 is L-shaped. The vertical part of the wire groove 5 extends from the cavity formed by the locking circular plate 43 and the cable reel 4 to the center line of the cable reel 4. The horizontal part of the wire groove 5 is opened along the center line of the cable reel 4 towards the support block 42 and is connected to the connecting groove 51. A slip ring stator 53 is fixedly connected inside the connecting groove 51. A slip ring rotor 52 is installed inside the slip ring stator 53. One end of the wound wire 25 extends through the wire groove 5 into the connecting groove 51. The wound wire 25 is electrically connected to the slip ring rotor 52. Multiple fixed connecting wires 54 extend from the inside of the slip ring stator 53. The connecting wire 21 is connected to the multiple fixed connecting wires 54. A power mechanism is provided on the side of the locking plate 43 away from the support block 42. Through the cooperation of the slip ring stator 53 and the slip ring rotor 52, it is ensured that the cable reel 4 will not affect the signal transmission between the connecting wire 21 and the wound wire 25 when winding or unwinding the wire, and the connecting wire 21 will not be twisted under the drive of the cable reel 4.

[0026] The power mechanism includes symmetrically opened extension circular grooves 6 on the inner wall of the extension groove 12. Circular frames 61 are fixedly connected inside each of the two extension circular grooves 6. A take-up spring 62 is provided inside the circular frame 61. A locking groove 64 is opened on the inner wall of the circular frame 61. A protrusion is provided at one end of the outer side of the take-up spring 62, extending into the interior of the locking groove 64. A transverse locking block 63 is fixedly connected to one end of the take-up spring 62 near the center line of the circular frame 61. A torsion groove is opened inside the locking shaft 44. The transverse locking block 63 is located inside the torsion groove of the locking shaft 44. A locking mechanism is provided on one side of the locking circular plate 43. Initially, the take-up spring 62 is in an untightened state, and at this time, the winding wire 25 is wound on the surface of the cable reel 4.

[0027] By tightening or releasing the winding spring 62, the cable reel 4 is driven to rotate, thereby controlling the direction of the wound wire 25 or the winding of the wire, thus achieving rapid winding and unwinding of the wound wire 25.

[0028] The locking mechanism includes a main shaft 7 fixedly connected to the inner wall of the extension groove 12. A locking pawl 71 is rotatably connected to the surface of the main shaft 7. Multiple helical teeth are arranged in a circumferential array on the surface of the locking circular plate 43. The locking pawl 71 extends into the interior of the adjacent helical teeth on the surface of the locking circular plate 43. A spring lever 72 is fixedly connected to the inner wall of the extension groove 12. The spring lever 72 is located on the rotation path of the locking pawl 71. A toggle groove 73 is opened on both sides of the inner wall of the extension groove 12. A transverse pull rod 74 is fixedly connected to the surface of the locking pawl 71. The transverse pull rod 74 extends out of the extension groove 12 through the toggle groove 73. The locking pawl 71 extends into the interior of the adjacent helical teeth on the surface of the locking circular plate 43 under the push of the spring lever 72.

[0029] The locking mechanism ensures that the cable reel 4 rotates in one direction during the cable laying process, preventing the cable reel 4 from rotating back under the pull of the spring tab 72, thereby improving the stability of the cable laying process.

[0030] The cable reel 4 rotates continuously under the action of the winding wire 25, and the oblique tooth block on the surface of the locking plate 43 pushes the locking pawl 71 to rotate around the main shaft 7. At this time, the spring pawl 72 is compressed and one end of the take-up spring 62 is fixed. The rotation of the cable reel 4 drives the locking shaft 44 to rotate, causing the take-up spring 62 inside the circular frame 61 to continuously tighten. Under the restriction of the locking pawl 71, it rotates in one direction and cannot rotate back. When the winding wire 25 is pulled to the appropriate length, the pulling force on the winding wire 25 is stopped. The locking pawl 71 extends into the next tooth groove under the push of the spring pawl 72, thereby restricting the position of the locking plate 43. By connecting the extension joint 22 and the connecting joint 24, the electronic component 2 can be tested by the tester 23. The length of the wound wire 25 can be adjusted according to different usage scenarios. After the wound wire 25 is stretched, the cable reel 4 is immediately locked by the locking mechanism to prevent the wound wire 25 from shrinking. This method of adjusting the length of the wound wire 25 according to the needs improves the applicability of the electrical box.

[0031] When the test is completed, disconnect the extension connector 22 from the connecting connector 24 and manually move the horizontal pull rod 74. At this time, the locking pawl 71 rotates around the main body shaft 7 and disengages from the rotation path of the helical tooth block of the locking disc 43. The locking disc 43 rotates under the release action of the winding spring 62, thereby winding up the released coiled wire 25. The tester does not need to spend time disassembling the control box. After arriving at the test site, the tester only needs to pull out the cable of the required length and connect it to the tester 23. After the test is completed, the cable can be instantly retracted and fixed by the winding mechanism, which greatly shortens the preparation and finishing time.

[0032] The speed limiting mechanism includes a limiting frame 8 fixedly connected to the inner wall of the support groove 45. Multiple limiting blocks 81 are arranged in a circumferential array on the inner wall of the limiting frame 8. A fixed abutment block 82 is fixedly connected to the side of the locking shaft 44 away from the locking circular plate 43. A fixed inclined rod 83 is fixedly connected to the surface of the fixed abutment block 82. An extension slide frame 85 is slidably connected to the surface of the fixed inclined rod 83. An inclined spring 84 is fixedly connected between the extension slide frame 85 and the fixed inclined rod 83. A power center shaft 88 is fixedly connected to the side of the locking shaft 44 away from the locking circular plate 43. A power locking rod 87 is rotatably connected to the surface of the power center shaft 88. One end of the power locking rod 87 has an abutment groove 86. The end of the power locking rod 87 with the abutment groove 86 is slidably installed inside the end of the extension slide frame 85 away from the fixed abutment block 82. A round rod is slidably connected inside the abutment groove 86. The round rod is fixedly connected inside the end of the extension slide frame 85 away from the fixed abutment block 82. A hook-lock mechanism is provided inside the limiting frame 8.

[0033] The hook-lock mechanism includes a hook fixedly connected to the end surface of the power lever 87 away from the extension slide frame 85. A connecting push rod 811 is rotatably connected to the end surface of the power lever 87 away from the extension slide frame 85. A connecting center shaft 810 is fixedly connected to the side of the locking shaft 44 away from the locking circular plate 43. A connecting lever 89 is rotatably connected to the surface of the connecting center shaft 810. One end of the connecting lever 89 is rotatably connected to the inside of the end of the connecting push rod 811 away from the power lever 87. A hook is provided at the end of the connecting lever 89 away from the connecting push rod 811. Both the hook on the surface of the power lever 87 and the hook on the surface of the connecting lever 89 are provided with counterweights. Initially, the inclined spring 84 is in an uncompressed state, and at this time, the limiting block 81 is not located on the rotation path of the hook of the connecting lever 89 and the power lever 87.

[0034] When the cable reel 4 is driven by the take-up spring 62 to take in the wound wire 25, it usually requires manual pulling to slowly release the wire. When the operator suddenly releases the wire due to an operational error, the cable reel 4 rotates rapidly under the drive of the take-up spring 62. The centripetal force generated at this time causes the connecting rod 89 and the power rod 87 to rotate outward around the power center axis 88 and the connecting center axis 810, respectively. At this time, the limiting block 81 enters the rotation range of the hooks of the connecting rod 89 and the power rod 87. At this time, the extension slide frame 85 slides along the surface of the fixed inclined rod 83 towards the fixed abutment block 82 under the pushing force given by the abutment groove 86. The inclined spring 84 is in a compressed state. As the locking shaft 44 continues to rotate, the hook engages with the limiting block 81, thereby limiting the locking shaft 44. By pulling the wound wire 25 with a small amplitude, the hook is disengaged from the limiting block 81, so that the wire can continue to be taken in. When the cable reel 4 rotates rapidly under the drive of the take-up spring 62, the tension on the transverse tie rod 74 is released, and the position of the cable reel 4 is restricted by the locking pawl 71. If the operator does not release the transverse tie rod 74 in time, the cable reel 4 will rotate at a certain speed, and the speed limiting mechanism will then restrict the cable reel 4. Through the double safety of the locking mechanism and the speed limiting mechanism, the locking shaft 44 is prevented from continuing to rotate rapidly, which would cause the extension joint 22 to swing wildly under the tension of the cable reel 4, resulting in deformation and damage to the extension joint 22. This improves the safety and reliability of the extension joint 22.

[0035] The following is the complete working process and working principle of the above embodiment: The winding wire 25 is pulled manually, and the cable reel 4 rotates continuously under the drive of the winding wire 25. The oblique tooth block on the surface of the locking plate 43 pushes the locking pawl 71 to rotate around the main shaft 7. At this time, the spring pawl 72 is in a compressed state, and one end of the winding spring 62 is in a fixed state. At this time, the rotation of the cable reel 4 drives the locking shaft 44 to rotate, causing the winding spring 62 inside the circular frame 61 to continuously tighten. Under the restriction of the locking pawl 71, it rotates in one direction, making it unable to rotate back. When the winding wire 25 is pulled to the appropriate length, the pulling force on the winding wire 25 is stopped. The locking pawl 71 extends into the next tooth groove under the push of the spring pawl 72, thereby restricting the position of the locking plate 43. By connecting the extension joint 22 and the connecting joint 24, the electronic component 2 is tested by the tester 23. The length of the wound wire 25 can be adjusted according to different usage scenarios. After the wound wire 25 is stretched, the cable reel 4 is immediately locked by the locking mechanism to prevent the wound wire 25 from shrinking. This method of adjusting the length of the wound wire 25 according to the needs improves the applicability of the electrical box.

[0036] When the test is completed, disconnect the extension connector 22 from the connecting connector 24 and manually move the horizontal pull rod 74. At this time, the locking pawl 71 rotates around the main body shaft 7 and disengages from the rotation path of the helical tooth block of the locking disc 43. The locking disc 43 rotates under the release action of the winding spring 62, thereby winding up the released coiled wire 25. The tester does not need to spend time disassembling the control box. After arriving at the test site, the tester only needs to pull out the cable of the required length and connect it to the tester 23. After the test is completed, the cable can be instantly retracted and fixed by the winding mechanism, which greatly shortens the preparation and finishing time.

[0037] When the cable reel 4 is driven by the take-up spring 62 to take in the wound wire 25, it usually requires manual pulling to slowly release the wire. When the operator suddenly releases the wire due to an operational error, the cable reel 4 rotates rapidly under the drive of the take-up spring 62. The centripetal force generated at this time causes the connecting rod 89 and the power rod 87 to rotate outward around the power center axis 88 and the connecting center axis 810, respectively. At this time, the limiting block 81 enters the rotation range of the hooks of the connecting rod 89 and the power rod 87. At this time, the extension slide frame 85 slides along the surface of the fixed inclined rod 83 towards the fixed abutment block 82 under the pushing force given by the abutment groove 86. The inclined spring 84 is in a compressed state. As the locking shaft 44 continues to rotate, the hook engages with the limiting block 81, thereby limiting the locking shaft 44. By pulling the wound wire 25 with a small amplitude, the hook is disengaged from the limiting block 81, so that the wire can continue to be taken in. When the cable reel 4 rotates rapidly under the drive of the take-up spring 62, the tension on the transverse tie rod 74 is released, and the position of the cable reel 4 is restricted by the locking pawl 71. If the operator does not release the transverse tie rod 74 in time, the cable reel 4 will rotate at a certain speed, and the speed limiting mechanism will then restrict the cable reel 4. Through the double safety of the locking mechanism and the speed limiting mechanism, the locking shaft 44 is prevented from continuing to rotate rapidly, which would cause the extension joint 22 to swing wildly under the tension of the cable reel 4, resulting in deformation and damage to the extension joint 22. This improves the safety and reliability of the extension joint 22.

[0038] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A tester for the electrical control box of an off-road scissor lift, comprising an electrical box (1), characterized in that: The electrical box (1) has a placement slot (11), an extension slot (12) and a protrusion slot (13) arranged sequentially from top to bottom inside. A sealing plate (14) is fixedly installed on the surface of the electrical box (1) by bolts. Multiple electronic components (2) are symmetrically arranged inside the extension slot (12). The electronic components (2) in the same row are connected in series. A connecting wire (21) is provided on the lower surface of the bottom electronic component (2). The connecting wire (21) passes through the extension slot (12) and extends into the protrusion slot (13). A winding wire (25) is provided at one end of the connecting wire (21). An extension connector (22) is provided at one end of the winding wire (25). A connecting connector (24) is snapped into the inside of the extension connector (22). A tester (23) is fixedly connected to one end of the connecting connector (24). The surface of the extension groove (13) is provided with a sealing mechanism to protect the internal extension joint (22), and the inside of the extension groove (12) is provided with a wire take-up mechanism to gather the connecting wire (21). A speed limiting mechanism to limit the speed of the wire take-up mechanism is provided on one side of the wire take-up mechanism.

2. The off-road scissor lift electrical control box tester according to claim 1, characterized in that: The sealing mechanism includes a sliding plate (3) that is slidably connected to the surface of the electrical box (1). The sliding plate (3) is located on the surface of the extension groove (13). Both ends of the sliding plate (3) near the electrical box (1) are fixedly connected to a power side plate (31). The power side plate (31) is L-shaped. Vertical guide grooves (32) are provided on both sides of the inner wall of the extension groove (13). The horizontal part of the power side plate (31) extends into the interior of the vertical guide groove (32) adjacent to it.

3. The off-road scissor lift electrical control box tester according to claim 2, characterized in that: The cable take-up mechanism includes two cable reels (4) symmetrically arranged inside the extension groove (12). Two support blocks (42) are symmetrically arranged inside the extension groove (12). A side rotating frame (41) is provided on the side of the cable reel (4) near the support block (42). The side rotating frame (41) is rotatably connected to the surface of the support block (42) nearby. A locking plate (43) is fixedly connected on the side of the side rotating frame (41) away from the support block (42). A locking shaft (44) is fixedly connected on one side of the locking plate (43). A support groove (45) is opened on the inner wall of the extension groove (12). The locking shaft (44) extends into the support groove (45). The locking shaft (44) is rotatably connected to the support groove (45). A connecting mechanism is provided inside the support block (42).

4. The off-road scissor lift electrical control box tester according to claim 3, characterized in that: The connecting mechanism includes a wire groove (5) opened inside the cable reel (4), and a connecting groove (51) opened inside the support block (42). The wire groove (5) is L-shaped. The vertical part of the wire groove (5) extends from the cavity formed by the positioning circular plate (43) and the cable reel (4) to the center line of the cable reel (4). The horizontal part of the wire groove (5) is opened along the center line of the cable reel (4) towards the support block (42). The horizontal part of the wire groove (5) is connected to the connecting groove (51).

5. A tester for the electrical control box of an off-road scissor lift according to claim 4, characterized in that: A slip ring stator (53) is fixedly connected inside the connecting groove (51). A slip ring rotor (52) is provided inside the slip ring stator (53). One end of the winding wire (25) extends through the wire groove (5) to the inside of the connecting groove (51). The winding wire (25) is electrically connected to the slip ring rotor (52). Multiple fixed connecting lines (54) extend from the inside of the slip ring stator (53). The connecting wire (21) is connected to the wires of the multiple fixed connecting lines (54). A power mechanism is provided on the side of the positioning plate (43) away from the support block (42).

6. The off-road scissor lift electrical control box tester according to claim 5, characterized in that: The power mechanism includes symmetrically opened extension circular grooves (6) on the inner wall of the extension groove (12). A circular frame (61) is fixedly connected inside each of the two extension circular grooves (6). A take-up spring (62) is provided inside the circular frame (61). A locking groove (64) is opened on the inner wall of the circular frame (61). A protrusion is provided at one end of the outer side of the take-up spring (62). The protrusion extends into the inside of the locking groove (64). A transverse locking block (63) is fixedly connected at one end of the take-up spring (62) near the center line of the circular frame (61). A torsion groove is opened inside the locking shaft (44). The transverse locking block (63) is located inside the torsion groove of the locking shaft (44). A locking mechanism is provided on one side of the locking circular plate (43).

7. A tester for the electrical control box of an off-road scissor lift according to claim 6, characterized in that: The locking mechanism includes a main shaft (7) fixedly connected to the inner wall of the extension groove (12). A locking pawl (71) is rotatably connected to the surface of the main shaft (7). Multiple helical teeth are arranged in a circumferential array on the surface of the locking circular plate (43). The locking pawl (71) extends into the interior of the adjacent helical teeth on the surface of the locking circular plate (43). A spring lever (72) is fixedly connected to the inner wall of the extension groove (12). The spring lever (72) is located on the rotation path of the locking pawl (71). A toggle groove (73) is opened on both sides of the inner wall of the extension groove (12). A transverse pull rod (74) is fixedly connected to the surface of the locking pawl (71). The transverse pull rod (74) passes through the toggle groove (73) and extends out of the extension groove (12). The locking pawl (71) extends into the interior of the adjacent helical teeth on the surface of the locking circular plate (43) under the push of the spring lever (72).

8. A tester for the electrical control box of an off-road scissor lift according to claim 7, characterized in that: The speed limiting mechanism includes a limiting frame (8) fixedly connected to the inner wall of the support groove (45). The inner wall of the limiting frame (8) is arranged in a circumferential array with multiple limiting blocks (81). A fixed abutment (82) is fixedly connected to the side of the locking shaft (44) away from the locking circular plate (43). A fixed inclined rod (83) is fixedly connected to the surface of the fixed abutment (82). An extension slide frame (85) is slidably connected to the surface of the fixed inclined rod (83). An inclined spring (84) is fixedly connected between the extension slide frame (85) and the fixed inclined rod (83). The locking shaft (44) is located away from the locking plate. A power center shaft (88) is fixedly connected to one side of the circular plate (43). A power lever (87) is rotatably connected to the surface of the power center shaft (88). One end of the power lever (87) is provided with a face groove (86). The end of the power lever (87) with the face groove (86) is slidably installed inside the end of the extension slide frame (85) away from the fixed block (82). A round rod is slidably connected inside the face groove (86). The round rod is fixedly connected inside the end of the extension slide frame (85) away from the fixed block (82). A hook locking mechanism is provided inside the limiting frame (8).

9. A tester for the electrical control box of an off-road scissor lift according to claim 8, characterized in that: The hook-lock mechanism includes a hook fixedly connected to the surface of the end of the power lever (87) away from the extension slide frame (85). The surface of the power lever (87) away from the extension slide frame (85) is rotatably connected to a connecting push rod (811). The side of the locking shaft (44) away from the locking circular plate (43) is fixedly connected to a connecting central shaft (810). The surface of the connecting central shaft (810) is rotatably connected to a connecting lever (89). One end of the connecting lever (89) is rotatably connected to the inside of the end of the connecting push rod (811) away from the power lever (87). The end of the connecting lever (89) away from the connecting push rod (811) is provided with a hook. The hooks on the surface of the power lever (87) and the hooks on the surface of the connecting lever (89) are both provided with counterweights.

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