Cable fault tester

Abstract

The invention discloses a cable fault tester, and relates to the technical field of cable fault testing. The cable fault tester comprises a box body and a cable fault tester body arranged on the box body, at least two pull rods which extend up and down and are in sliding fit with the box body are arranged on one side of the box body, the top ends of the pull rods are in transition connection through a handle, and at least two storage grooves are formed in the bottom of the box body and located on one sides of the pull rods. Traveling wheels capable of entering and exiting the storage grooves are rotationally arranged in the storage grooves, tension springs used for preventing the traveling wheels from rotating out of the storage grooves are arranged between the storage grooves and the traveling wheels, and the pull rods and the traveling wheels are connected in a matched mode through driving assemblies. The pull rod drives the walking wheel to rotate out of the containing groove through the driving assembly, and when the pull rod moves downwards, the tension spring contracts to pull the walking wheel to rotate into the containing groove.

Description

Technical Field

[0001] The invention relates to the technical field of cable fault testing, in particular to a cable fault tester. Background Art

[0002] The cable fault detector is a comprehensive cable fault detection instrument that can test the cable's high-resistance flashover fault, high- and low-resistance grounding, short circuit, cable break, poor contact and other faults. Currently, the cable fault testers for large cables are basically a rectangular box, which stores the test equipment in the box. This can not only protect the body but also be easy to carry.

[0003] In the prior art, since the cable fault tester is heavy, it is necessary to frequently move the cable fault tester back and forth when changing the test point in the fault detection site, which consumes a lot of the tester's physical strength. At the same time, the inconvenience of carrying also brings inconvenience to the fault detection, reducing the test efficiency. At the same time, since the cable fault tester itself is relatively short, it is placed on the ground and the tester needs to squat to operate the test. Similarly, the reciprocating squatting and standing movements also consume physical energy, and the long-term squatting posture also causes physical discomfort to the tester. Summary of the invention

[0004] The purpose of the present invention is to provide a cable fault tester. The cable fault tester is designed to have a structure similar to a suitcase, which is convenient for a tester to move the cable fault tester at any time. The walking wheels can be retracted synchronously when the pull rod is retracted. The entire device can stand stably on the ground when performing a fault test. The cable fault tester is designed to have a suitcase-like structure to increase the operating height of the tester, so that the tester can operate the tester while standing, avoiding physical discomfort to the tester caused by long-term squatting posture, reducing physical energy consumption, and improving fault testing efficiency.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a cable fault tester, comprising a box body and a cable fault tester arranged on the box body, at least two pull rods extending up and down and slidingly cooperating with the box body are arranged on one side of the box body, the top of the pull rod is transitionally connected by a handle, and at least two storage grooves are arranged on the bottom of the box body and on one side of the pull rod, and walking wheels that can move in and out of the storage groove are rotatably arranged in the storage groove, and a tension spring is arranged between the storage groove and the walking wheel to prevent the walking wheel from rotating out of the storage groove, and the pull rod and the walking wheel are connected by a driving assembly. When the pull rod moves upward, the pull rod drives the walking wheel out of the storage groove through the driving assembly, and when the pull rod moves downward, the tension spring contracts to pull the walking wheel into the storage groove.

[0006] Preferably, the box body comprises an upper section and a lower section from top to bottom, the top of the upper section is open and used to accommodate the cable fault tester, and one side of the lower section is open and used to accommodate the drawer.

[0007] Preferably, a guide sleeve corresponding to each of the pull rods is provided on one side of the box body, and the pull rods are slidably arranged in the corresponding guide sleeves.

[0008] Preferably, an axle seat is provided in the storage groove, and a rotating shaft rotatably matched with the axle seat is provided on the top of the walking wheel.

[0009] Preferably, the driving assembly includes a rack slidably arranged on one side of the box body up and down, a half gear meshing with the rack is arranged on the walking wheel, the half gear is coaxially arranged with the rotating shaft, an extension rod extending upward is arranged on the top of the rack, a top plate is arranged on the top of the extension rod, and a hook plate vertically corresponding to the top plate is arranged at the bottom of the pull rod and below the top plate.

[0010] Preferably, a vertical guide rail corresponding to the rack is provided on one side of the box body, and a vertical slide groove slidingly matched with the vertical guide rail is provided on the rack, the vertical length of the vertical slide groove is greater than the length of the vertical guide rail, and the part of the vertical slide groove that exceeds the length of the vertical guide rail is greater than one quarter of the circumference of the half gear.

[0011] Preferably, an automatic locking mechanism is also provided between the pull rod and the guide sleeve, the pull rod is hollow, and the automatic locking mechanism includes a slider seat arranged at the bottom end of the pull rod, a first slide groove is provided on one side of the slider seat, a slider is slidably provided in the first slide groove, second slide grooves connected to the first slide groove are respectively provided on the slider seat and located on both sides of the first slide groove, the second slide groove extends up and down and passes through the top of the slider seat, force transmission rods are slidably provided in the two second slide grooves, and a cylindrical connector extending into the first slide groove is provided on the inner side of the bottom end of the force transmission rod. A force-bearing groove arranged inclined up and down is provided on the side of the slider facing the cylindrical connecting head, the cylindrical connecting head is slidably arranged in the force-bearing groove, and a driving mechanism for driving the force transmission rod to move up and down is also provided on the handle; a second spring for preventing the slider from entering the first sliding groove is provided in the first sliding groove, a locking plug is provided at the end of the slider facing away from the first sliding groove, and locking holes matching with the locking plug are respectively provided on the side of the guide sleeve close to the top and the bottom, and the locking plug passes through the pull rod and extends to the outside of the pull rod to be plugged and matched with the corresponding locking hole.

[0012] Preferably, the handle is hollow and connected to the pull rod, the driving mechanism includes a button arranged inside the handle, the middle part of the button protrudes upward, and a button avoidance groove is arranged on the top of the handle, the raised part in the middle of the button passes through the button avoidance groove and extends to the top of the handle, downwardly extending connecting sockets are arranged at both ends of the handle, the handle is connected to the corresponding pull rod through the connecting sockets, and a first spring for preventing the button from moving downward is also arranged inside the handle, and a pressing rod extending up and down is arranged inside the pull rod, the top of the pressing rod is fixedly connected to the button, and the bottom end of the pressing rod is provided with a foot plate, and the tops of two corresponding force transmission rods are transitionally connected through a transition connecting plate, and the foot plate fits with the transition connecting plate.

[0013] Preferably, the bottom of the box is provided with supporting feet.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. In the present invention, the cable fault tester is designed to be similar to a suitcase-like structure, which is convenient for testers to move the cable fault tester at any time. The running wheels can be retracted synchronously when the pull rod is retracted, and the entire device can stand stably on the ground when performing fault testing.

[0015] 2. In the present invention, the cable fault tester is designed with a suitcase-like structure to increase the operating height of the tester, so that the tester can operate the tester while standing, avoiding physical discomfort caused by long-term squatting posture. At the same time, it reduces the physical energy consumption caused by reciprocating squatting during the test process, reduces the physical energy consumption of the mobile cable fault tester, and improves the fault testing efficiency.

[0016] 3. In the present invention, the pull rod and the travel wheel are designed with mechanical linkage. The travel wheel is extended when the pull rod is pulled out, and the travel wheel is retracted when the pull rod is retracted, thereby realizing rapid adjustment of the moving state and the test state, facilitating the detection personnel to quickly move and use the cable fault tester, and indirectly increasing the test efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The appearance of the present invention Figure 1 (The pull rod extends out of the guide sleeve); Figure 2 The appearance of the present invention Figure 2 (The walking wheel rotates out of the storage slot); Figure 3 For the present invention Figure 2 A magnified view of part A in FIG. Figure 4 The appearance of the present invention Figure 3 (The pull rod is retracted into the guide sleeve); Figure 5 The appearance of the present invention Figure 4 (The walking wheel turns into the storage slot); Figure 6 For the present invention Figure 5 A magnified view of part B in FIG. Figure 7 It is a structural schematic diagram of the travel wheel of the present invention; Figure 8 The appearance of the present invention Figure 5 (Cable fault tester opened at the front angle); Fig. 9 The appearance of the present invention Figure 6 (The cable fault tester is opened at the back angle); Fig.10 It is a partial three-dimensional exploded view of the present invention; Fig.11 It is a partial plan exploded view of the present invention; Fig.12 The matching relationship between the rack and the vertical guide rail of the present invention is Figure 1 (exploded view); Fig.13 The matching relationship between the rack and the vertical guide rail of the present invention is Figure 2 (matching view); Fig.14 The plane structure of the present invention Figure 1 (The guide sleeve is not shown and the pull rod is not pulled out); Fig.15 The plane structure of the present invention Figure 2 (Guide sleeve not shown and tie rod in pulled out position); Fig.16 The matching relationship between the pull rod and the guide sleeve of the present invention is Figure 1 (locked state); Fig.17 The matching relationship between the pull rod and the guide sleeve of the present invention is Figure 2 (Unlocked state); Fig.18 This is a disassembled diagram of the pull rod and the guide sleeve of the present invention; Fig.19 For the present invention Fig.18 A magnified view of part C in FIG. Fig. 20 It is a structural diagram of the guide sleeve of the present invention; Fig.21 A diagram showing the arrangement of buttons of the present invention; Fig. 22 For the present invention Fig.21 A magnified view of part D in FIG. Fig.23 It is a structural diagram of the handle of the present invention; Fig.24 An exploded view of the automatic locking mechanism of the present invention; Fig.25 It is a structural diagram of the automatic locking mechanism of the present invention; Fig.26 The internal structure of the automatic locking mechanism of the present invention Figure 1 (The locking plug enters the first slide slot); Fig. 27 The internal structure of the automatic locking mechanism of the present invention Figure 2 (The locking plug does not enter the first slide slot).

[0018] In the figure: 1-box, 11-box upper section, 12-box lower section, 121-support foot, 13-storage slot, 14-guide sleeve, 141-hook plate avoidance slot, 142-locking hole, 15-vertical guide rail, 151-rail seat, 152-limiting plate, 16-axle seat, 17-tension spring, 18-transition connection seat, 19-first ring, 2- Cable fault tester, 3- Drawers, 4-Tie rod, 5-handle, 51-connection socket, 52-button avoidance slot, 6-travel wheel, 61-half gear, 62-rotating shaft, 63-second ring, 71-button, 72-pressing rod, 73-foot plate, 74-first spring, 75-slider seat, 751-first slide groove, 752-second slide groove, 753-second spring, 76-slider, 761-locking plug, 762-force groove, 77-force transmission rod, 771-column connector, 772-transition connecting plate, 78-hook plate, 781-rack avoidance groove, 8- rack, 81- extension rod, 82- vertical slide, 83- top plate. DETAILED DESCRIPTION

[0019] 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.

[0020] like Figures 1 to 15As shown, a cable fault tester includes a box body 1 and a cable fault tester 2 arranged on the box body 1, at least two pull rods 4 extending up and down and slidably matched with the box body 1 are arranged on one side of the box body 1, and the top of the pull rod 4 is transitionally connected through a handle 5, and at least two storage grooves 13 are arranged at the bottom of the box body 1 and on one side of the pull rod 4, and a walking wheel 6 that can enter and exit the storage groove 13 is rotatably arranged in the storage groove 13, and a tension spring 17 for preventing the walking wheel 6 from rotating out of the storage groove 13 is arranged between the storage groove 13 and the walking wheel 6, and the pull rod 4 and the walking wheel 6 are connected by a driving assembly. When the pull rod 4 moves upward, the pull rod 4 drives the walking wheel 6 out of the storage groove 13 through the driving assembly, and when the pull rod 4 moves downward, the tension spring 17 contracts to pull the walking wheel 6 into the storage groove 13.

[0021] like Figure 1 , Figure 4 , Figure 8 and Fig. 9 As shown, in this embodiment, the box body 1 includes an upper box section 11 and a lower box section 12 from top to bottom. The top of the upper box section 11 is open and used to accommodate the cable fault tester 2. When using the cable fault tester 2, the cover of the cable fault tester 2 can be directly opened from the top of the upper box section 11. One side of the lower box section 12 is open and used to accommodate a drawer 3. The drawer 3 is slidably arranged in the lower box section 12 through a drawer slide rail. The drawer 3 is used to accommodate tools, wires, etc. used in cable fault testing.

[0022] As a specific implementation method, Figure 1 and Figure 2 As shown, a guide sleeve 14 corresponding to the pull rod 4 is provided on one side of the box 1, and the pull rod 4 is slidably arranged in the corresponding guide sleeve 14. In this embodiment, two pull rods 4 are used, and the top ends of the two pull rods 4 are transitionally connected through a handle 5 to form a hand-pulled frame with an inverted "U"-shaped structure. After the pull rod 4 is pulled upward, the walking wheel 6 is rotated out of the storage groove 13, and the box 1 is tilted to the side where the pull rod 4 is located, so that the box 1 can be in contact with the ground only through the walking wheel 6. In this way, the cable fault tester can be pulled like a suitcase, which is convenient for the tester to move the cable fault tester at any time in the test site, saving the tester's physical strength and indirectly improving the test efficiency of cable faults.

[0023] like Figures 2 to 3 , Figures 5 to 7As shown, an axle seat 16 is provided in the storage groove 13, and a rotating shaft 62 is provided on the top of the running wheel 6 to rotate with the axle seat 16. It should be noted that in this embodiment, the rotating shaft 62 is in rotational cooperation with the axle seat 16, and the rotating shaft 62 is in fixed cooperation with the running wheel 6, the purpose is to ensure that the running wheel 6 rotates into or out of the storage groove 13 with the rotation of the rotating shaft 62, when the rotating shaft 62 is fixed relative to the storage groove 13, the running wheel 6 is also fixed relative to the storage groove 13, to ensure that the running wheel 6 can stably support the overall weight of the box body 1 after rotating out of the storage groove 13.

[0024] Specifically, the receiving groove 13 is provided with a first ring 19 (such as Figure 3 As shown in FIG. 1 ), the walking wheel 6 is provided with a second ring 63 (as shown in FIG. Figure 7 As shown in the figure, the second ring 63 is located between the rotating shaft 62 and the wheel of the walking wheel 6, one end of the tension spring 17 is hooked on the first ring 19, and the other end of the tension spring 17 is hooked on the second ring 63. When the tension spring 17 is in a naturally contracted state, the walking wheel 6 is located in the receiving groove 13. After the walking wheel 6 rotates out of the receiving groove 13, the tension spring 17 is in a stressed stretched state.

[0025] As a specific implementation method, Figures 10 to 15 As shown, the driving assembly includes a rack 8 that is slidably arranged on one side of the box body 1, and a half gear 61 that meshes with the rack 8 is arranged on the walking wheel 6. It should be noted that the half gear 61 is coaxially arranged with the rotating shaft 62. An extension rod 81 extending upward is arranged on the top of the rack 8, and a top plate 83 is arranged on the top of the extension rod 81. A hook plate 78 corresponding to the top plate 83 is arranged at the bottom of the pull rod 4 and below the top plate 83. When the pull rod 4 is in a retracted state (such as Figure 4 and Fig.14 As shown in FIG. 1 ), the hook plate 78 is away from the top plate 83, and after the pull rod 4 is pulled outward (as shown in FIG. 1 ), the hook plate 78 is away from the top plate 83, and the pull rod 4 is pulled outward (as shown in FIG. 1 ). Figure 1 and Fig.15 As shown in the figure, during the upward movement of the pull rod 4, the hook plate 78 gradually approaches the top plate 83. After the hook plate 78 contacts the top plate 83 and continues to move upward, the hook plate 78 hooks the top plate 83 and moves upward with the top plate 83. The top plate 83 pulls the rack 8 upward through the extension rod 81. During the upward movement of the rack 8, the half gear 61 is driven to rotate. While the half gear 61 rotates, it drives the walking wheel 6 to rotate outward and rotate out of the storage groove 13.

[0026] Specifically in this embodiment, Figures 10 to 13As shown, a vertical guide rail 15 corresponding to the rack 8 is provided on one side of the box body 1, and the vertical guide rail 15 is fixed on one side of the box body 1 through a rail seat 151, and a vertical slide groove 82 that slides with the vertical guide rail 15 is provided on the rack 8. For the convenience of description, the vertical length of the vertical slide groove 82 is tentatively defined as L1, the vertical length of the vertical guide rail 15 is defined as L2, and the diameter of the half gear 61 is defined as D. The vertical length of the vertical slide groove 82 is greater than the length of the vertical guide rail 15, that is: L1>L2. The length portion of the vertical slide groove 82 that exceeds the vertical guide rail 15 is greater than one-fourth of the circumference of the half gear 61, that is: L2-L1>1 / 4*π*D. In this way, it is ensured that the rack 8 can drive the half gear 61 to rotate at least 90°, and that the walking wheel 6 has a sufficient rotation angle to rotate in or out of the storage groove 13.

[0027] Preferably, Figure 6 , Fig.11 , Figures 14 to 17 As shown, the rack 8 is located between the pull rod 4 and the box body 1, specifically, the hook plate 78 is located at the bottom of the pull rod 4, and the side of the guide sleeve 14 facing the rack 8 is provided with a hook plate avoidance groove 141 for the hook plate 78 to pass through, and the side of the hook plate 78 facing the rack 8 is provided with a rack avoidance groove 781, and the rack 8 is located in the rack avoidance groove 781, and the guide sleeve 14 and the box body 1 are transitionally connected through a transition connection seat 18, and the transition connection seat 18 is mainly used to increase the distance between the guide sleeve 14 and the box body 1, so that there is enough space between the guide sleeve 14 and the box body 1 to install the rack 8.

[0028] Furthermore, if Figure 12 to Figure 13 As shown, the side of the rack 8 away from the rail seat 151 is limited by a limit plate 152, and the limit plate 152 is fixed to the vertical guide rail 15 by screws. The limit plate 152 is mainly used to prevent the rack 8 from moving horizontally, ensuring that the rack 8 can only move up and down along the vertical guide rail 15.

[0029] In this embodiment, an automatic locking mechanism is also provided between the pull rod 4 and the guide sleeve 14. When the pull rod 4 moves upward until the walking wheel 6 is fully turned out, the pull rod 4 is fixed to the guide sleeve 14 through the automatic locking mechanism, and the walking wheel 6 is fixed at the same time, so that the walking wheel 6 is in a stable expanded state and can be subjected to force and move.

[0030] As a specific implementation method, Figures 16 to 27As shown, the pull rod 4 is hollow, and the automatic locking mechanism includes a slider seat 75 arranged at the bottom end of the pull rod 4, a first slide groove 751 is arranged on one side of the slider seat 75, a slider 76 is slidably arranged in the first slide groove 751, and second slide grooves 752 connected to the first slide groove 751 are respectively arranged on the slider seat 75 and located on both sides of the first slide groove 751. The second slide groove 752 extends up and down and passes through the top of the slider seat 75, and force transmission rods 77 are slidably arranged in the two second slide grooves 752. The inner side of the bottom end of the force transmission rod 77 (the side of the force transmission rod 77 facing the first slide groove 751 is the inner side) is provided with a columnar connector 771 extending into the first slide groove 751 The slider 76 is provided with a force groove 762 arranged obliquely up and down on one side facing the columnar connector 771, and the columnar connector 771 is slidably arranged in the force groove 762. The handle 5 is also provided with a driving mechanism for driving the force transmission rod 77 to move up and down; the first slide groove 751 is provided with a second spring 753 for preventing the slider 76 from entering the first slide groove 751, and the slider 76 is provided with a locking plug 761 on one end facing away from the first slide groove 751, and the guide sleeve 14 is provided with locking holes 142 matching with the locking plug 761 on one side near the top and the bottom, respectively, and the locking plug 761 passes through the pull rod 4 and extends to the outside of the pull rod 4 (such as Fig.19 As shown) is plugged into and matched with the corresponding locking hole 142.

[0031] It should be noted that if Fig.26 and Fig. 27 As shown, with the open end of the first slide groove 751 as the front side, the force groove 762 is arranged obliquely from the front lower direction of the slider 76 to the rear upper direction of the slider 76. At the same time, under the limiting action of the second slide groove 752, the force transmission rod 77 and the columnar connecting head 771 can only move up and down. When the force transmission rod 77 is driven by the driving mechanism to move up and down, the force transmission rod 77 moves downward, driving the cylindrical connector 771 to move downward, and the force bearing groove 762 is pushed by the downward movement of the cylindrical connector 771. Under the force decomposition effect of the inclined force bearing surface of the force bearing groove 762, the downward thrust of the cylindrical connector 771 received by the force bearing groove 762 is decomposed into a vertical downward extrusion force and a horizontal backward driving force. The vertical downward extrusion force is offset by the reaction force of the slider seat 75 on the slider 76, and the horizontal backward driving force pushes the slider 76 to move into the first slide groove 751, and the second spring 753 is compressed until the slider 76 and the corresponding locking plug 761 enter the first slide groove 751. After the locking plug 761 enters the corresponding first slide groove 751, the locking plug 761 also disengages from the corresponding locking hole 142 at the same time. At this time, the lock between the pull rod 4 and the guide sleeve 14 is released, and the pull rod 4 can move up and down in the guide sleeve 14 (as shown in FIG. Fig.17As shown in the figure), when the locking plug 761 is not horizontally corresponding to any locking hole 142, after the downward pressure on the force transmission rod 77 is released, under the elastic force of the second spring 753, the slider 76 is subjected to a driving force toward the forward side. Under this driving force, the locking plug 761 is pressed against the inner wall of the guide sleeve 14, and the pull rod 4 can still move up and down in the guide sleeve 14 until the locking plug 761 is horizontally corresponding to a corresponding locking hole 142. At this time, under the action of the second spring 753, the locking plug 761 is driven into the locking hole 142 to complete the locking between the pull rod 4 and the guide sleeve 14.

[0032] Preferably, the highest and lowest positions of the locking hole 142 and the highest and lowest positions of the rack 8 can be adaptively designed and adjusted according to the optimal deployment position of the running wheel 6 and the optimal retracted position into the storage slot 13. Specifically, taking the case where the running wheel 6 is in a vertical state after being deployed as the optimal deployment position and the running wheel 6 is in a horizontal state after being retracted into the storage slot 13 as the optimal retracted position as an example: When the running wheel 6 is in the optimal unfolded state, the locking plug 761 cooperates with the corresponding locking hole 142 located above (such as Figure 1 and Fig.15 As shown in the figure), the bottom surface of the vertical slide groove 82 coincides with the bottom surface of the vertical guide rail 15, so that the rack 8 is in the highest position that can be raised. At the same time, under the limiting effect of the hook plate 78 on the top plate 83, the vertical movement of the rack 8 is completely restricted, thereby completely limiting the rotation of the half gear 61, and finally putting the walking wheel 6 in a stable unfolded state.

[0033] When the running wheel 6 is in the optimal contracted state, the locking plug 761 cooperates with the corresponding locking hole 142 located below (such as Figure 4 and Fig.14 As shown in the figure, the top surface of the vertical slide groove 82 coincides with the top surface of the vertical guide rail 15, and under the tension of the tension spring 17, the walking wheel 6 is in a stable contracted state.

[0034] As a specific implementation method, Figure 21 to Figure 25As shown, the handle 5 is hollow and connected to the pull rod 4. The driving mechanism includes a button 71 arranged inside the handle 5, the middle part of the button 71 protrudes upward, and a button avoidance groove 52 is arranged on the top of the handle 5. The middle protruding part of the button 71 passes through the button avoidance groove 52 and extends to the top of the handle 5. The two ends of the handle 5 are provided with downward extending connecting sockets 51, and the handle 5 is connected to the corresponding pull rod 4 through the connecting sockets 51. The inside of the handle 5 is also provided with a first spring 74 for preventing the button 71 from moving downward. The inside of the pull rod 4 is provided with a pressing rod 72 extending up and down, the top of the pressing rod 72 is fixedly connected to the button 71, and the bottom end of the pressing rod 72 is provided with a foot plate 73. The tops of the two corresponding force transmission rods 77 are transitionally connected by a transition connecting plate 772, and the foot plate 73 fits the transition connecting plate 772. It should be noted that when the button 71 is in the topmost state under the elastic force of the first spring 74, the locking plug 761 is in a state of cooperation with the locking hole 142 under the elastic force of the second spring 753, that is, when the force transmission rod 77 and the transition connecting plate 772 are in the topmost state, the foot plate 73 is in contact with the transition connecting plate 772, so that when the button 71 is driven downward by manpower, the transition connecting plate 772 and the force transmission rod 77 are driven downward by the pressing rod 72 and the foot plate 73, and the locking plug 761 is disengaged from the locking hole 142.

[0035] Furthermore, if Figure 2 As shown, the bottom of the box 1 is provided with legs 121. Specifically, at least four legs 121 are provided and are evenly arranged at the bottom of the lower section 12 of the box. The legs 121 can be made of rubber anti-skid pads to increase the friction and stability of contact with the ground.

[0036] Working principle: When in use, the tester needs to carry the cable fault tester to move when entering the cable fault test site, leaving the test site, or changing the test point in the site. When moving the cable fault tester designed by the present invention, the handle 5 is used to pull the pull rod 4 upward. During the process of the pull rod 4 being pulled upward, the hook plate 78 pulls the rack 8 upward. While the rack 8 moves upward, it drives the half gear 61 to rotate. During the rotation of the half gear 61, it drives the walking wheel 6 to rotate out of the storage groove 13, so that the walking wheel 6 is unfolded, and the box body 1 is tilted to the side where the pull rod 4 is located, so that the box body 1 can be in contact with the ground only through the walking wheel 6. In this way, the cable fault tester can be pulled like a suitcase, which is convenient for the tester to move the cable fault tester at any time in the test site, saving the tester's physical strength and indirectly improving the testing efficiency of cable faults.

[0037] When adjusting the height of the pull rod 4, the locking plug 761 can be disengaged from the locking hole 142 by simply pressing the button 71, thereby releasing the limit of the pull rod 4 inside the guide sleeve 14. When the pull rod 4 is moved upward or downward, it is not necessary to keep pressing the button 71. When the pull rod 4 moves to the highest or lowest point, the locking plug 761 is automatically driven into the corresponding locking hole 142 under the action of the second spring 753.

[0038] When performing a cable fault test, the pull rod 4 is re-stored into the guide sleeve 14. Under the tension of the tension spring 17, the walking wheel 6 rotates back into the storage groove 13. At this time, the bottom surface of the box body 1 is in contact with the ground again, and is in stable contact with the bottom surface through the support feet 121, which makes it convenient for testers to use the cable fault tester 2 to perform fault testing.

[0039] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A cable fault tester, characterized in that: The invention comprises a box body (1) and a cable fault tester (2) arranged on the box body (1), wherein at least two pull rods (4) extending upward and downward are arranged on one side of the box body (1), the two pull rods (4) are connected to the box body (1) in a sliding manner, the top ends of the pull rods (4) are transitionally connected via handles (5), and at least two storage grooves (13) are arranged on the bottom of the box body (1) and on one side of the pull rods (4), and a movable member (13) is rotatably arranged in the storage groove (13) and capable of entering and exiting the storage groove (13). A running wheel (6), a tension spring (17) is provided between the storage groove (13) and the running wheel (6) for preventing the running wheel (6) from rotating out of the storage groove (13), and the pull rod (4) and the running wheel (6) are connected by a driving assembly. When the pull rod (4) moves upward, the pull rod (4) drives the running wheel (6) out of the storage groove (13) through the driving assembly. When the pull rod (4) moves downward, the tension spring (17) contracts to pull the running wheel into the storage groove (13).

2. A cable fault tester according to claim 1, characterized in that: The box body (1) comprises, from top to bottom, an upper box body section (11) and a lower box body section (12), wherein the top of the upper box body section (11) is open and is used to accommodate a cable fault tester (2), and one side of the lower box body section (12) is open and is used to accommodate a drawer (3).

3. A cable fault tester according to claim 1, characterized in that: A guide sleeve (14) corresponding one to one with the pull rod (4) is provided on one side of the box body (1), and the pull rod (4) is slidably arranged in the corresponding guide sleeve (14).

4. A cable fault tester according to claim 1, characterized in that: An axle seat (16) is arranged in the storage groove (13), and a rotating shaft (62) rotatably matched with the axle seat (16) is arranged on the top of the walking wheel (6).

5. A cable fault tester according to claim 4, characterized in that: The driving assembly comprises a rack (8) slidably arranged on one side of the box body (1) up and down, a half gear (61) meshing with the rack (8) is arranged on the walking wheel (6), the half gear (61) is coaxially arranged with the rotating shaft (62), an extension rod (81) extending upward is arranged at the top of the rack (8), a top plate (83) is arranged at the top of the extension rod (81), and a hook plate (78) vertically corresponding to the top plate (83) is arranged at the bottom of the pull rod (4) and below the top plate (83).

6. A cable fault tester according to claim 5, characterized in that: A vertical guide rail (15) corresponding to the rack (8) is provided on one side of the box body (1); a vertical slide groove (82) slidably matched with the vertical guide rail (15) is provided on the rack (8); the vertical length of the vertical slide groove (82) is greater than the length of the vertical guide rail (15); and the portion of the vertical slide groove (82) that exceeds the length of the vertical guide rail (15) is greater than one quarter of the circumference of the half gear (61).

7. A cable fault tester according to claim 3, characterized in that: An automatic locking mechanism is also provided between the pull rod (4) and the guide sleeve (14). The pull rod (4) is hollow and the automatic locking mechanism comprises a slider seat (75) provided at the bottom end of the pull rod (4). A first slide groove (751) is provided on one side of the slider seat (75). A slider (76) is slidably provided in the first slide groove (751). Second slide grooves (752) connected to the first slide groove (751) are provided on the slider seat (75) and on both sides of the first slide groove (751). The second slide grooves (752) extend up and down and pass through the top of the slider seat (75). Force transmission rods (77) are slidably provided in the two second slide grooves (752). A columnar connector (771) extending into the first slide groove (751) is provided on the inner side of the bottom end of the force transmission rod (77). The slider (76) A force-bearing groove (762) arranged inclined up and down is provided on the side facing the columnar connecting head (771), and the columnar connecting head (771) is slidably arranged in the force-bearing groove (762), and a driving mechanism for driving the force transmission rod (77) to move up and down is also provided on the handle (5); a second spring (753) is provided in the first slide groove (751) to prevent the slider (76) from entering the first slide groove (751), and a locking plug (761) is provided at one end of the slider (76) facing away from the first slide groove (751), and locking holes (142) matching with the locking plug (761) are respectively provided on one side of the guide sleeve (14) near the top and the bottom, and the locking plug (761) passes through the pull rod (4) and extends to the outside of the pull rod (4) to be plugged into and matched with the corresponding locking hole (142).

8. A cable fault tester according to claim 7, characterized in that: The handle (5) is hollow and connected to the pull rod (4). The driving mechanism comprises a button (71) arranged inside the handle (5). The middle part of the button (71) protrudes upward. The top of the handle (5) is provided with a button avoidance groove (52). The middle protrusion of the button (71) passes through the button avoidance groove (52) and extends to the top of the handle (5). Both ends of the handle (5) are provided with connection sockets (51) extending downward. The handle (5) is connected to the pull rod (4) through the connection sockets (51). ) is connected with the corresponding pull rod (4), the handle (5) is also provided with a first spring (74) for preventing the button (71) from moving downward, the pull rod (4) is provided with a pressing rod (72) extending up and down, the top of the pressing rod (72) is fixedly connected with the button (71), the bottom of the pressing rod (72) is provided with a foot plate (73), the tops of the two corresponding force transmission rods (77) are transitionally connected by a transition connecting plate (772), and the foot plate (73) is in contact with the transition connecting plate (772).

9. A cable fault tester according to claim 1, characterized in that: The bottom of the box body (1) is provided with supporting feet (121).

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