A cable fault tester

Abstract

This invention provides a cable fault tester, comprising an outer housing, an inner housing, a wheel frame, and a first stroke generating device. The wheel frame is slidably disposed within the outer housing, and the inner housing is located within the outer housing and abuts against the wheel frame to prevent sliding between the outer housing and the wheel frame. The wheel frame also has a wheel that is at least partially exposed within the outer housing. The first stroke generating device is located within the outer housing and is connected to both the inner and outer housings. The first stroke generating device causes the inner housing to detach from the wheel frame, exposing at least a portion of the inner housing within the outer housing. Simultaneously, the outer housing slides with the wheel frame, causing the wheel of the wheel frame to retract into the outer housing. When the inner housing is exposed within the outer housing, the wheel automatically retracts into the outer housing, preventing the tester from sliding and facilitating subsequent testing.

Description

Technical Field

[0001] This invention relates to the technical field of testing instruments, and in particular to a cable fault tester. Background Technology

[0002] A cable fault detector is a comprehensive cable fault detection instrument that can test for high-resistance flashover faults, high and low resistance grounding, short circuits, cable breaks, poor contact, and other faults in cables. Currently, cable fault detectors for large cables are basically housed in a cubic box, which protects the instrument and makes it easy to carry.

[0003] The casters on existing cable fault detectors are not easy to retract, so they are prone to slipping during use, which affects subsequent testing work. Summary of the Invention

[0004] The purpose of this invention is to provide a cable fault tester that solves the problem that the casters of existing cable testers are inconvenient to retract.

[0005] To achieve the above objectives, the present invention provides a cable fault tester, comprising an outer housing, an inner housing, and a wheel frame. The wheel frame is slidably disposed within the outer housing, and the inner housing is located within the outer housing, and the inner housing also abuts against the wheel frame to limit sliding between the outer housing and the wheel frame. The wheel frame is further provided with a wheel that is at least partially exposed within the outer housing. The tester also includes a first stroke generating device, which is located within the outer housing and is connected to both the inner housing and the outer housing.

[0006] The first stroke generating device causes the inner box to detach from the wheel frame, and at least a portion of the inner box is exposed to the outer box;

[0007] The outer casing slides synchronously with the wheel frame, causing the wheels of the wheel frame to retract into the outer casing.

[0008] In the aforementioned cable fault tester, the first stroke generating device includes a linkage assembly, which includes a first link. The first link is fixedly connected to the inner wall of the outer housing, and the first link can also drive the outer housing to displace the wheel, causing at least a portion of the wheel to protrude from the outer housing. Preferably, the wheel is a swivel wheel.

[0009] In the aforementioned cable fault tester, the linkage assembly further includes a second linkage, which is hinged or indirectly connected to the first linkage. The second linkage is also fixedly connected to the outer wall of the inner housing. The second linkage is operable to move relative to the first linkage, and the second linkage synchronously drives the inner housing to retract into the outer housing until the inner housing returns to the state of contact with the wheel frame.

[0010] The aforementioned cable fault tester further includes a second stroke generating device, which is disposed within the inner housing. A drawer assembly is provided on the inner housing. The second stroke generating device is connected to the drawer assembly. When the first stroke generating device is activated, the second stroke generating device is associatedly driven, and the drawer assembly is driven by the second stroke generating device to a state in which it is at least partially exposed within the inner housing.

[0011] In the aforementioned cable fault tester, the drawer assembly includes a first drawer, which is slidably connected to the side wall of the inner housing along a first direction. The second stroke generating device includes a first transmission rod, a first rack, and a first transmission mechanism. The first transmission rod is slidably disposed within the inner housing, and a first transmission tooth is provided on a first surface of the first transmission rod. The first rack is fixedly connected to the first drawer. The first transmission mechanism is respectively connected to the first surface and the first rack, and drives the first drawer to be at least partially exposed in the inner housing along the first direction.

[0012] In the aforementioned cable fault tester, the drawer assembly further includes a second drawer, which is slidably connected to the side wall of the inner housing along a second direction. The second stroke generating device further includes a second rack, and a second transmission tooth is provided on the second surface of the first transmission rod. The second surface is connected to the second rack via the second transmission tooth, and drives the second drawer to be at least partially exposed in the inner housing along the second direction.

[0013] In the aforementioned cable fault tester, the first direction is perpendicular to the second direction, and the first surface is perpendicular to the second surface.

[0014] In the aforementioned cable fault tester, the second stroke generating device further includes a delayed motion mechanism and a first fixing rod. The inner housing is provided with a protruding strip for engaging with the delayed motion mechanism. The first fixing rod is fixedly disposed in the outer housing. When the inner housing rises to a preset height, the delayed motion mechanism operably loses engagement with the protruding strip and engages with the first fixing rod.

[0015] The aforementioned cable fault tester also includes an operation panel, which is hinged to the top of the inner housing. Wires are placed inside the inner housing and are electrically connected to the operation panel.

[0016] The aforementioned cable fault tester further includes a third stroke generating device, which is disposed within the inner housing. The third stroke generating device includes a third rack, a fourth rack, a second transmission mechanism, and a pulley block. The third rack is fixedly connected to the first fixed rod, and the fourth rack is slidably disposed within the outer housing and is also fixedly connected to the pulley block. The second transmission mechanism is respectively drivenly connected to the third rack and the fourth rack. The wire is wound around the pulley block and is wound and unwound through the pulley block.

[0017] Compared with the prior art, the advantages of this invention are as follows:

[0018] When the inner housing of the present invention is exposed in the outer housing, the wheels can be automatically retracted into the outer housing, preventing the tester from slipping and providing convenience for subsequent testing work;

[0019] When the inner box of the present invention is exposed outside the outer box, the first drawer and the second drawer can be opened automatically in sequence.

[0020] When the inner box of the present invention is retracted into the outer box, the first drawer and the second drawer can also be automatically retracted.

[0021] When the inner housing of the present invention is retracted into the outer housing, the wheels can also be automatically exposed from the outer housing.

[0022] When the inner casing of the present invention is raised or lowered by the outer casing, the wires on the control panel can be automatically retracted to avoid the wires becoming tangled. Attached Figure Description

[0023] Figure 1 This is a perspective view of the present invention;

[0024] Figure 2 yes Figure 1 Diagram showing the inner cabinet and control panel in raised position;

[0025] Figure 3 yes Figure 1 A state diagram viewed from the bottom;

[0026] Figure 4 yes Figure 1 Internal structure diagram after the outer casing is removed;

[0027] Figure 5 yes Figure 4 A state diagram viewed from the bottom;

[0028] Figure 6 yes Figure 5 A structural diagram after the wheel frame has been removed.

[0029] Figure 7 This is a structural diagram of the drawer assembly and the second stroke generator;

[0030] Figure 8 yes Figure 7 The side view of the first and second drawers has been partially removed.

[0031] Figure 9 yes Figure 8 Side view in the middle;

[0032] Figure 10 yes Figure 9 Enlarged view of point A in the middle;

[0033] Figure 11 This is a partial structural diagram of the rotating tooth portions of the first and second racks.

[0034] In the diagram: 1. Outer casing; 2. Cover; 3. Control panel; 4. First drawer; 5. Second drawer; 6. Wheel; 7. Wheel frame; 8. Inner casing; 9. First transmission rod; 10. First transmission mechanism; 11. First rack; 12. First fixed rod; 13. Second transmission mechanism; 14. Fourth rack; 15. Movable pulley; 16. Fixed pulley; 17. Wire; 18. Second rack; 19. Gear shaft; 20. Linkage assembly; 21. Reciprocating lead screw; 22. Motor; 23. Rotating gear; 24. Torsion spring; 25. Insert rod; 26. Spring; 27. Connecting rod; 28. Press button; 29. ​​Third rack; 30. Raised strip; 31. Stop lever. Detailed Implementation

[0035] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and are not intended to limit the scope of the invention.

[0036] like Figures 1 to 3As shown, the cable fault tester of the present invention includes an outer casing 1, an inner casing 8, and a wheel frame 7. The bottom of the outer casing 1 is hollow after removing the bottom plate. The inner casing 8 and the wheel frame 7 are both placed inside the outer casing 1, with the wheel frame 7 located at the bottom of the outer casing 1 and the inner casing 8 located above the wheel frame 7. In the initial state, the wheels 6 at the bottom of the wheel frame 7 are partially or completely exposed outside the outer casing 1, which facilitates the movement of the entire cable fault tester by the wheels 6. At this time, the inner casing 8 is located on the wheel frame 7, and the bottom of the inner casing 8 abuts against the four symmetrically arranged stop bars 31 on the wheel frame 7, increasing the friction between the outer casing 1 and the wheel frame 7. At this time, the weight of the outer casing 1 is less than the friction between the outer casing 1 and the wheel frame 7, and the outer casing 1 cannot slide with the wheel frame 7. The inner casing 8 plays the role of preventing the outer casing 1 from sliding down.

[0037] Furthermore, as a preferred embodiment, the top of the inner box 8 is also hinged to an operation panel 3 via a hinge shaft, and the top of the outer box 1 is also hinged to a cover 2 via a hinge shaft. After the inner box 8 is completely retracted into the outer box 1, the operation panel 3 is rotated to return it to its initial position, and the cover 2 is closed to seal the inner box 8 and its operation panel 3 into the outer box 1.

[0038] Furthermore, as a preferred implementation method, such as Figures 4 to 9 As shown, a first stroke generating device is also provided inside the outer casing 1. The first stroke generating device is configured to be connected to the inner wall of the outer casing 1 and the outer wall of the inner casing 8 respectively. The first stroke generating device is also placed on the wheel frame 7. The inner casing 8 is driven to move inside the outer casing 1 by the first stroke generating device. When the bottom of the inner casing 8 is disengaged from between the four stop levers 31, the friction between the outer casing 1 and the wheel frame 7 is reduced and is insufficient to overcome the gravity of the outer casing 1. At this time, the outer casing 1 slides downward relative to the wheel frame 7, the bottom of the outer casing 1 contacts the ground and is supported by the ground, and the wheel 6 of the wheel frame 7 is retracted into the outer casing 1. The entire cable fault tester is not easy to move on the ground.

[0039] As described above, in a preferred embodiment, the first stroke generating device can be configured as a mechanism including a reciprocating screw 21, a motor 22, and a connecting rod assembly 20. The motor 22 is fixedly mounted on the inner wall of the outer housing 1 by bolts. The output shaft of the motor 22 is fixedly connected to one end of the reciprocating screw 21 through a coupling. The reciprocating screw 21 is connected to the bottom of the connecting rod assembly 20. The connecting rod assembly 20 is fixedly mounted on the inner wall of the outer housing 1, and the top end of the connecting rod assembly 20 is fixedly connected to the bottom end of the inner housing 8. When the motor 22 rotates forward, it drives the reciprocating screw 21 to rotate. The reciprocating screw 21 converts its rotation into linear motion, thereby causing the connecting rod assembly 20 to extend, and through the connecting rod assembly 20, the inner housing 8 is exposed out of the outer housing 1.

[0040] Furthermore, in a preferred embodiment, the linkage assembly 20 is formed by a plurality of linkages 27 hinged together in sequence. The linkage located at the bottom of the linkage assembly 20 is referred to as the first linkage, and the linkage located at the top of the linkage assembly 20 is referred to as the second linkage. The side of the first linkage is fixedly installed on the inner wall of the outer housing 1, and the top surface of the second linkage is fixedly installed on the bottom surface of the inner housing 8. The motor 22 rotates forward to drive the reciprocating screw 21 to rotate. The first linkage and the second linkage are opened in sequence through the reciprocating screw 21, so that the entire linkage assembly 20 is extended, thereby pushing the inner housing 8 partially or completely out of the outer housing 1.

[0041] Alternatively, as another implementation, the first stroke generating device may be configured as a mechanism including a telescopic cylinder (not shown in the figure) and a connecting rod assembly 20. Two telescopic cylinders are provided and symmetrically arranged on both sides of the bottom of the outer housing 1. The two telescopic cylinders are arranged in parallel to realize synchronous adjustment of the two cylinders. The telescopic rod of each telescopic cylinder is hinged to one side of the bottom of the connecting rod assembly 20 through a hinge shaft. The two telescopic rods extend synchronously, thereby driving the connecting rod assembly 20 to extend. The two telescopic rods shorten synchronously, thereby driving the connecting rod assembly 20 to shorten, thereby realizing the adjustment of the height of the inner housing 8.

[0042] Furthermore, as a preferred embodiment, the inner box 8 is also provided with a second stroke generating device inside, and a drawer assembly is provided inside the inner box 8. The drawer assembly includes a first drawer 4 and a second drawer 5. Preferably, the number of first drawers 4 is set to two, and the number of second drawers 5 is set to four. The two first drawers 4 are symmetrically arranged on both sides of the inner box 8, and the four second drawers 5 are symmetrically arranged on the front and back of the inner box 8. When the inner box 8 is in the initial state, the two first drawers 4 are located above the four second drawers 5, and each first drawer 4 and each second drawer 5 contains maintenance tools. The first stroke generating device and the second stroke generating device are connected together. In other words, when the first stroke generating device drives the inner box 8 to rise, the second stroke generating device is linked with the first stroke generating device, thereby causing each first drawer 4 and each second drawer 5 to slide out of the inner box 8 in sequence, thereby realizing the automatic opening of the first drawers 4 and the second drawers 5 in the inner box 8 during the rising process of the inner box 8.

[0043] Further, as a preferred embodiment, the second stroke generating device includes a first transmission rod 9, two first racks 11, and two first transmission mechanisms 10. The first transmission rod 9 is vertically arranged inside the inner box 8 and can be slidably connected to the inner box 8. A first rack 11 is welded or fixedly connected to the same side of each first drawer 4. The length direction of each first rack 11 is along a first direction. The first and third sides of the first transmission rod 9 are parallel to each other, that is, the two sides of the first transmission rod 9 are respectively provided with first transmission teeth and third transmission teeth. The first transmission teeth on the first side mesh with the first transmission mechanism 10 and are connected to a first rack 11 through the first transmission mechanism 10.

[0044] Similarly, the third transmission tooth on the third surface meshes with another first transmission mechanism 10, and is connected to another first rack 11 through the first transmission mechanism 10. The bottom of the first transmission rod 9 is connected to the protruding strip 30 inside the inner box 8, so that the first transmission rod 9 is driven to rise vertically through the inner box 8. The toothed parts on the first and third surfaces, namely the first transmission tooth and the third transmission tooth, mesh with the corresponding first transmission mechanism 10. Each first transmission mechanism 10 drives the corresponding first rack 11 to slide along the first direction, thereby opening the first drawer 4 from the inner box 8.

[0045] As described above, in a preferred embodiment, such as Figures 7 to 9 As shown, the second stroke generating device also includes a second rack 18 and a gear shaft 19. Preferably, there are four second racks 18 and four gear shafts 19. Each second drawer 5 is provided with one second rack 18, and the length direction of each second rack 18 is parallel to the second direction. One end of each gear shaft 19 is fixed to the inner wall of the inner box 8, and the other end of each gear shaft 19 has teeth for meshing with the second rack 18. There are two first transmission rods 9, which are symmetrically arranged on both sides inside the inner box 8. Each first transmission rod 9 is also provided with a second surface, which has second transmission teeth. The second surface is perpendicular to the first surface or the third surface. When the first transmission rod 9 rises, the gear shaft 19 meshes with the corresponding second transmission teeth, thereby driving the corresponding second rack 18 to slide along the second direction, thereby automatically opening the second drawer 5.

[0046] As described above, as a preferred embodiment, such as Figure 11As shown, the top of the first, second, and third sides does not have transmission teeth. When the inner box 8 rises to a certain height, that is, when the bottom of each first drawer 4 or second drawer 5 in the inner box 8 is higher than the top of the outer box 1, the first transmission mechanism 10 will engage with the first transmission tooth or the second transmission tooth, or the gear shaft 19 will engage with the first transmission rod 9. This prevents the first transmission mechanism 10 from driving the corresponding first drawer 4 to slide, or the gear shaft 19 from driving the second rack 18 to move, while the first drawer 4 or second drawer 5 is still inside the outer box 1, causing the first drawer 4 or second drawer 5 to contact the inner wall of the outer box 1 and hinder the rise of the inner box 8.

[0047] Furthermore, as a preferred embodiment, such as Figure 10 As shown, the second stroke generating device also includes a delayed motion mechanism and a first fixed rod 12. The first fixed rod 12 is welded inside the outer casing 1. When the first drawer 4 and / or the second drawer 5 are fully opened, the delayed motion mechanism is activated, temporarily fixing the first transmission rod 9 to the first fixed rod 12, thereby causing the inner casing 8 to slide relative to the first transmission rod 9. The inner casing 8 continues to rise, while the first transmission rod 9 remains stationary.

[0048] As described above, in a preferred embodiment, the delayed motion mechanism includes a rod 25, a spring 26, a connecting rod 27, and a pressing button 28. A cavity is provided at the bottom of the first transmission rod 9. One end of the rod 25 is slidably inserted into the cavity, and a cavity is also provided on the rod 25. One end of the connecting rod 27 is hinged in the cavity within the rod 25, and the other end is hinged to the bottom of the pressing button 28. The spring 26 is also disposed within the cavity of the rod 25. When the first transmission rod 9 rises to a preset height, the first drawer... 4. When the second drawer 5 is fully opened, the bottom of the first transmission rod 9 is hooked together with the top of the first fixing rod 12. The first fixing rod 12 contacts the pressing key 28 on the first transmission rod 9. The pressing key 28 is pressed into the insertion rod 25 through the connecting rod 27. At the same time, the pressing key 28 drives the insertion rod 25 to move to the left, so that the right end of the insertion rod 25 is disengaged from the protrusion strip 30 of the inner box 8, and the left end is inserted into the insertion hole at the top of the first fixing rod 12, thus temporarily fixing the first fixing rod 12 and the first transmission rod 9.

[0049] Furthermore, as a preferred embodiment, the cable fault tester also includes a third stroke generating device, which is located inside the inner housing 8. When the inner housing 8 rises, the wires 17 on the operation panel 3 may become tangled. The third stroke generating device retracts and extends the wires 17, thereby tidying up the wires 17 during the rising process of the inner housing 8.

[0050] As described above, in a preferred embodiment, the third stroke generating device includes a third rack 29, a fourth rack 14, a second transmission mechanism 13, a movable pulley 15, and a fixed pulley 16. The third rack 29 is welded to the first fixed rod 12. The fourth rack 14 is slidably disposed inside the outer housing 1, and the movable pulley 15 is welded to the top of the fourth rack 14. The fixed pulley 16 is fixedly installed on the inner wall of the inner housing 8 by bolts. The second transmission mechanism 13 is connected to the third rack 29 and the fourth rack 14 respectively. The wire 17 is wound around the fixed pulley 16 and the movable pulley 15 in sequence. During the upward movement of the inner housing 8, the fourth rack 14 slides downward relative to the inner housing 8, thereby driving the movable pulley 15 to move downward and tighten the wire 17.

[0051] As shown above, in a preferred embodiment, the first rack 11 and the second rack 18 are rotatably connected to a rotating tooth 23. A torsion spring 24 is installed on the rotating tooth 23 to keep it in the same direction as the other gear teeth. When the drawer assembly is unfolded and the first drawer 4 and the second drawer 5 are manually pushed into the inner box 8, and then the inner box 8 is retracted into the outer box 1, the first transmission mechanism 10 and the gear shaft 19 rotate to move the rotating tooth 23, thereby preventing the first rack 11 and / or the second rack 18 from jamming. Therefore, the drawer assembly can be manually pushed into the inner box 8, and the drawer assembly can also be automatically retracted during the descent of the inner box 8.

[0052] Furthermore, as a preferred embodiment, both the first transmission mechanism 10 and the second transmission mechanism 13 are configured as sprockets and chains, with meshing gears coaxially mounted on each sprocket to facilitate meshing and transmission with the first rack 11, the second rack 18, and the first transmission rod 9, respectively.

[0053] The working process and working principle of this invention:

[0054] The rising process of inner box 8 is as follows:

[0055] When the motor 22 rotates forward or the telescopic cylinder extends, it drives the connecting rod assembly 20 to extend.

[0056] After the linkage assembly 20 extends a certain distance, the bottom of the inner box 8 disengages from the four levers 31 on the wheel frame 7, the wheel frame 7 loses contact with the inner box 8, the outer box 1 overcomes the friction between the wheel frame 7 and the outer box 1 due to its own weight, the outer box 1 slides downward, and the wheel 6 at the bottom of the wheel frame 7 is retracted into the outer box 1.

[0057] As the inner box 8 continues to rise, the first conveyor rod 9 rises synchronously with the inner box 8 because the right end of the first conveyor rod 9 is inserted into the protruding strip 30 inside the inner box 8.

[0058] When the height of the first drawer 4 is higher than the top of the outer box 1, the first transmission mechanism 10 meshes with the first transmission tooth and the third transmission tooth on the first transmission rod 9. The first transmission mechanism 10 drives the corresponding first rack 11 to move synchronously, thereby causing the two first drawers 4 to slide out of the inner box 8 automatically.

[0059] When the height of the second drawer 5 is higher than the height of the outer box 1, the gear shaft 19 meshes with the second transmission gear on the first transmission rod 9, thereby driving the corresponding second rack 18 to move synchronously, so that the four second drawers 5 automatically slide out of the inner box 8.

[0060] The inner box 8 continues to rise until the first drawer 4 and the second drawer 5 are fully opened;

[0061] At this time, the bottom of the first conveying rod 9 is hooked together with the top of the first fixing rod 12, so that the pressing key 28 is pressed into the insertion rod 25. The pressing key 28 drives the insertion rod 25 to move to the left, so that the right end of the insertion rod 25 is disengaged from the protrusion strip 30 in the inner box 8, and the left end of the insertion rod 25 is inserted into the insertion hole (not shown in the figure) at the top of the first fixing rod 12. The first fixing rod 12 and the first conveying rod 9 are temporarily fixed together.

[0062] The inner box 8 continues to rise until the inner box 8 is completely exposed outside the outer box 1;

[0063] During the upward movement of the inner housing, the fourth rack slides downward relative to the inner housing, thereby driving the movable pulley to move downward, and the wire is stretched through the movable pulley and the fixed pulley;

[0064] The descent process of inner box 8 is as follows:

[0065] The motor 22 reverses or the cylinder retracts, causing the connecting rod assembly 20 to shorten.

[0066] After the linkage assembly 20 shortens the distance at one end, the protrusion 30 of the inner box 8 moves to the right end of the insertion rod 25, the first transmission rod 9 moves down slightly, so that the first fixing rod 12 loses its pressure on the pressing button 28, and the compressed spring 26 drives the insertion rod 25 to move to the right in the first transmission rod 9, so that the right end of the insertion rod 25 is inserted into the protrusion 30, and the left end is disengaged from the insertion hole of the first fixing rod 12. The first transmission rod 9 and the inner box 8 remain in a relatively fixed state.

[0067] The inner box 8 continues to descend, and the second drawer 5 and the first drawer 4 automatically retract into the inner box 8 in sequence.

[0068] During the shortening process, the first link of the linkage assembly 20 is displaced upward relative to the ground, thereby causing the outer housing 1, which is fixedly connected to it, to rise. The wheel 6 on the wheel frame 7 is then exposed out of the outer housing 1. The bottom of the inner housing 8 is inserted into the wheel frame 7, thereby pressing against the wheel frame 7 and restricting the outer housing 1 from sliding with the wheel frame 7, thus achieving the automatic exposure of the wheel 6.

[0069] During the descent of the inner housing 8, the fourth rack 14 slides upward relative to the inner housing 8, thereby driving the movable pulley 15 to move upward, and tightening the wire 17 through the movable pulley 15 and the fixed pulley 16.

[0070] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present invention, and these improvements and substitutions should also be considered within the scope of protection of the present invention.

Claims

1. A cable fault tester comprising an outer case, an inner case and a wheel frame, the wheel frame being slidingly arranged in the outer case, the inner case being located in the outer case and the inner case also abutting the wheel frame for limiting the outer case from sliding with the wheel frame, and the wheel frame further being provided with a wheel at least partially exposed in the outer case, characterized in that, The first stroke generating device is arranged in the outer box body and connected with the inner box body and the outer box body respectively; The first stroke generating device drives the inner box body to separate from the wheel frame and exposes at least part of the inner box body from the outer box body; The outer box body synchronously slides with the wheel frame and makes the wheels of the wheel frame retract into the outer box body; The second stroke generating device is arranged in the inner box body, the inner box body is provided with a drawer assembly, the second stroke generating device is connected with the drawer assembly, when the first stroke generating device operates, the second stroke generating device is driven to expose at least part of the drawer assembly from the inner box body; The first fixed rod is fixedly arranged in the outer box body, the second stroke generating device further comprises a delay movement mechanism, the inner box body is provided with a protruding strip for detachably fixed connection with the delay movement mechanism, when the inner box body rises to a preset height, the delay movement mechanism is operatively disconnected with the protruding strip and detachably fixedly connected with the first fixed rod; The drawer assembly comprises a first drawer and a second drawer, the first drawer is slidably connected with the side wall of the inner box body along a first direction, and the second drawer is slidably connected with the side wall of the inner box body along a second direction, the first direction being perpendicular to the second direction.

2. The cable fault tester of claim 1, wherein, The first stroke generating device comprises a linkage assembly, the linkage assembly comprises a first linkage, the first linkage is fixedly connected with the inner wall of the outer box body, and the first linkage can drive the outer box body to move to expose at least part of the wheels from the outer box body.

3. The cable fault tester of claim 2, wherein, The linkage assembly further comprises a second linkage, the second linkage is connected with the first linkage, and the second linkage is fixedly connected with the outer wall of the inner box body, the second linkage is operatively movable relative to the first linkage, and the second linkage synchronously drives the inner box body to retract into the outer box body until the inner box body returns to the state of abutting against the wheel frame.

4. The cable fault tester of claim 1, wherein, The second stroke generating device comprises a first transmission rod, a first rack and a first transmission mechanism, the first transmission rod is slidably arranged in the inner box body, a first transmission gear is arranged on a first surface of the first transmission rod, the first rack is fixedly connected with the first drawer, the first transmission mechanism is in transmission connection with the first surface and the first rack respectively and drives the first drawer to at least partially expose from the inner box body along the first direction.

5. The cable fault tester of claim 4, wherein, The second stroke generating device further comprises a second rack, a second transmission gear is arranged on a second surface of the first transmission rod, the second surface is in transmission connection with the second rack through the second transmission gear and drives the second drawer to at least partially expose from the inner box body along the second direction.

6. The cable fault tester of claim 5, wherein, The first surface is perpendicular to the second surface.

7. The cable fault tester of claim 1, wherein, The operation panel is hinged to the top of the inner box, and an electric wire is placed in the inner box and electrically connected with the operation panel.

8. The cable fault tester of claim 7, wherein, The third stroke generating device is arranged in the inner box, and comprises a third rack, a fourth rack, a second transmission mechanism and a pulley set. The third rack is fixedly connected with the first fixed rod. The fourth rack is slidingly arranged in the outer box and fixedly connected with the pulley set. The second transmission mechanism is in transmission connection with the third rack and the fourth rack respectively. The electric wire is wound on the pulley set and retracted and extended through the pulley set.

Images