Integrated grounding device capable of automatically storing cable and operation method

Abstract

The invention discloses an integrated grounding device capable of automatically storing a cable and an operation method, the grounding device comprises a box body, universal wheels, a reel rack, four wire reels, springs, the cable, a cable clamp and an anti-rotation mechanism, the universal wheels are installed on the lower side of the box body, the four wire reels are rotatably connected in the box body through the reel rack, the springs are installed on the wire reels, and the anti-rotation mechanism is installed on the cable clamp. The cable is wound on the wire spool, a wire hole is formed in the box body, the cable clamp is detachably connected to the upper side of the box body, first sawteeth are arranged on the periphery of the wire spool, the anti-rotation mechanism comprises a pawl and a push rod, second sawteeth matched with the first sawteeth are arranged at the lower end of the pawl, and the hinged end of the pawl extends to form a shifting rod; after the wire clamp is detached from the upper side of the box body, the pawl rotates downwards under the action of gravity, and the second sawteeth can be meshed with the first sawteeth to prevent the wire spool from rotating reversely. The three-phase cable grounding device facilitates three-phase cable grounding and improves carrying and storage convenience.

Description

Technical Field

[0001] This invention relates to the field of grounding device technology, and in particular to an integrated grounding device and its operation method that can automatically retract cables. Background Technology

[0002] During power maintenance, grounding clamps are required to connect cables to ensure operational safety. Existing grounding clamps, such as the one in patent application number 201920985523.4, can only connect one cable. In actual operation, it is necessary to connect three-phase cables, which often requires carrying three separate grounding clamps. After connecting the three separate grounding clamps to the three-phase cables, and then grounding them separately, three cable connection operations and three grounding operations are required, totaling six connection operations. This is cumbersome. In addition, the three separate grounding clamp devices are more scattered, inconvenient to carry and store. After the operation is completed, the cables associated with the grounding clamps need to be stored separately, further increasing the complexity of the operation. Summary of the Invention

[0003] To address the shortcomings of existing grounding clamps for three-phase cable grounding, which are cumbersome to operate and inconvenient to carry and store, this invention proposes an integrated grounding device and operating method that can automatically store cables, facilitating three-phase cable grounding and improving portability and storage convenience.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: An integrated grounding device for automatically retracting cables includes a housing, casters, a reel frame, cable reels, springs, cables, cable clamps, and an anti-rotation mechanism. The casters are mounted on the underside of the housing. Four cable reels are rotatably connected to the housing via the reel frame. Springs are installed on the cable reels for resetting. One cable reel is electrically connected to the other three. Cables are wound on each cable reel, and the cables are connected to corresponding cable clamps. The cable clamps are detachably connected to the upper side of the housing. The cable reels have a first serration along their outer periphery. The anti-rotation mechanism includes a pawl and a push rod. One end of the pawl is hinged to the inner wall of the upper side of the housing. The lower end of the pawl is provided with a second tooth that matches the first tooth. The hinged end of the pawl extends to form a lever. The push rod extends vertically through the upper side of the housing and slides with the housing. The upper end of the push rod abuts against the lower side of the wire clamp, and the lower end of the push rod abuts against the upper side of the lever, so that the second tooth disengages from the first tooth. After the wire clamp is removed from the upper side of the housing, the pawl rotates downward under the action of gravity, and the second tooth can engage with the first tooth to prevent the winding reel from rotating in reverse.

[0005] Furthermore, the wire clamp includes an insulating rod and a clamping device disposed at the end of the insulating rod. A U-shaped buckle is connected to the upper side of the housing. The insulating rod of the wire clamp extends back and forth and is locked in the U-shaped buckle.

[0006] Furthermore, the grounding device also includes a pull rod located on the front side of the enclosure, with the lower end of the pull rod hinged to the enclosure, and a buckle connected to the front side of the enclosure that can engage with the pull rod.

[0007] Furthermore, the front end of the insulating rod of the wire clamp does not extend beyond the front side of the box, and the wire clamp is located at the rear end of the insulating rod.

[0008] Furthermore, four winding reels are arranged in a rectangular pattern inside the housing. Two wire holes are provided on both the front and rear sides of the housing. The cables corresponding to the two winding reels on the front side are connected to the front end of the insulating rod of two of the wire clamps through the wire holes on the front side. The cables corresponding to the two winding reels on the rear side are connected to the wire clamps of the other two wire clamps through the wire holes on the rear side.

[0009] Furthermore, a baffle is connected to the cable, and the baffle abuts against the outside of the box.

[0010] Furthermore, four casters are provided, each located below a different winding reel. The grounding device also includes a braking mechanism. A braking mechanism is provided between each of the four winding reels and the casters. After the winding reel releases the cable, the braking mechanism brakes the corresponding caster. The braking mechanism includes a sleeve, a compression spring, a brake lever, a transmission rod, and a cam. The sleeve is vertically connected to the inner wall of the bottom of the housing. A through hole is provided at the bottom of the housing. The brake lever vertically passes through the sleeve and the through hole. When braking, the brake lever is used to contact the caster. The upper and lower ends of the sleeve are narrowed to enclose the brake lever. The brake lever has a boss located inside the sleeve. The compression spring is set in the sleeve. The upper end of the compression spring is connected to the boss of the brake lever, and the lower end of the compression spring is connected to the lower end of the sleeve. The cam is rotatably connected to the disc frame. One end of the spring is connected to the winding disc, and the other end is connected to the cam. One end of the transmission rod is hinged to the edge of the cam, and the other end is hinged to the upper end of the brake lever.

[0011] Furthermore, the caster wheel includes a swivel base, a wheel frame, and rollers. The swivel base is rotatably connected to the lower side of the housing, and has through holes running vertically through it. The wheel frame is connected to the lower side of the swivel base, and the rollers are rotatably mounted on the lower end of the wheel frame. The through hole is connected to the via hole, and the brake lever is used to contact the roller.

[0012] An operating method for an integrated grounding device capable of automatically retracting cables includes: Initially, the wire clamp is connected to the upper side of the box. At this time, the wire clamp presses down on the push rod, causing the pawl to lift up, the first serration to disengage from the second serration, and the spring between the reel and the winding reel is in a free state. When grounding, remove the clamp from the top of the box. After the clamp is disengaged from the upper end of the push rod, the pawl rotates downward under the action of gravity. The pawl pushes the push rod upward through the lever, and the first saw tooth contacts the second saw tooth. When the cable is pulled outward, the cable causes the winding reel to rotate and release the cable. The helical side of the first saw tooth acts on the second saw tooth. The first and second saw teeth do not mesh. When the winding reel rotates, it causes one end of the spring to rotate. The spring generates elastic potential energy after twisting. After the cable is pulled outward, the straight surface of the second saw tooth acts on the first saw tooth. The second saw tooth meshes with the first saw tooth. The clamps connected to the three winding reels are connected to the three-phase cable, and the clamp connected to the remaining winding reel is grounded. After the operation is completed, the wire clamp is reinstalled on the upper side of the box. The wire clamp pushes the push rod downwards, and the lower end of the push rod pushes the pawl upwards through the lever. After the second saw tooth separates from the first saw tooth, the winding reel automatically rotates under the action of the spring, winding the external cable into the box.

[0013] In operation, the housing of this invention is used to house the winding reel and the supporting clamps, making it convenient to carry, move and store the grounding device; each grounding device has four clamps, three of which are connected to the three-phase cable, and only one clamp is needed for grounding, reducing wiring operations and improving grounding efficiency; after the clamps are reinstalled, the winding reel automatically retracts the cable, improving storage efficiency.

[0014] In this invention, during grounding, the wire clamp is removed from the top of the housing. After the wire clamp disengages from the upper end of the push rod, the pawl rotates downwards under gravity. The pawl pushes the push rod upwards via a lever, causing the first and second saw teeth to engage, pulling the cable outwards. When the cable releases the cable by rotating the winding reel, the first and second saw teeth do not mesh. At this time, the pawl does not prevent the winding reel from rotating. The rotation of the winding reel causes one end of the spring to rotate, generating elastic potential energy after the spring twists. After stopping the cable pulling, the second and first saw teeth engage, preventing the winding reel from rotating back under the spring's action. The wire clamps connected to the three winding reels are connected to the three-phase cable, and the wire clamp connected to the remaining winding reel is grounded. This allows the three-phase cable to share a single grounding cable. The entire grounding process involves four wiring operations, resulting in higher grounding efficiency, less wire consumption, and a lighter overall device that is easy to carry and store. Attached Figure Description

[0015] Figure 1 This is a three-dimensional schematic diagram of the present invention. Figure 2 for Figure 1 Side view, Figure 3 for Figure 2 Enlarged view of point A, Figure 4 for Figure 1 Simplified top view, Figure 5 This is a schematic diagram of the braking mechanism. Figure 6 This is a schematic diagram showing the engagement of the first and second saw teeth. Figure 7A schematic diagram illustrating the braking action of the braking mechanism; In the picture: 3. Enclosure; 31. Through hole; 4. Casters; 41. Rotary seat; 42. Wheel frame; 43. Rollers; 44. Through hole; 5. Reel frame; 6. Winding reel; 7. Spring; 8. Cable; 9. Wire clamp; 91. Insulating rod; 92. Wire clamp; 10. Anti-rotation mechanism; 101. Pawl; 102. Push rod; 103. Lever; 104. Second sawtooth; 11. Wire hole; 12. First serration; 13. U-shaped buckle; 14. Pull rod; 15. Baffle; 16. Braking mechanism; 161. Sleeve; 162. Compression spring; 163. Brake lever; 164. Transmission rod; 165. Cam. Detailed Implementation

[0016] The technical solution of the present invention will be further described in detail below through embodiments and in conjunction with the accompanying drawings.

[0017] like Figures 1 to 7 As shown, an integrated grounding device for automatically storing cables includes a housing 3, casters 4, a reel frame 5, a winding reel 6, a spring 7, a cable 8, a clamp 9, and an anti-rotation mechanism 10. The casters 4 are installed on the lower side of the housing 3. Four winding reels 6 are provided and are rotatably connected to the housing 3 via the reel frame 5. A spring 7 is installed between the winding reel 6 and the reel frame 5 for resetting. One winding reel 6 is electrically connected to the other three winding reels 6. Cables 8 are wound on each winding reel 6. The housing 3 is provided with a wire hole 11, through which the cable 8 extends to the outside of the housing 3 and is connected to a clamp 9. The clamp 9 is detachably connected to the upper side of the housing 3. The winding reel 6 has a first serration 12 along its outer periphery. The anti-rotation mechanism 10 includes a pawl 101 and a push rod 102. One end of the pawl 101 is hinged to the upper inner wall of the housing 3. The lower end of the pawl 101 is provided with a second serration 104 that matches the first serration 12. The hinged end of the pawl 101 extends to form a lever 103. The push rod 102 extends vertically through the upper side of the housing 3 and is slidably connected to the housing 3. The upper end of the push rod 102 is used to abut against the lower side of the wire clamp 9, and the lower end of the push rod 102 is used to abut against the upper side of the lever 103, so that the second serration 104 disengages from the first serration 12. After the wire clamp 9 is removed from the upper side of the housing 3, the pawl 101 rotates downward under the action of gravity, and the second serration 104 can engage with the first serration 12 to prevent the winding reel 6 from reversing.

[0018] With the above settings, firstly, the housing 3 is used to accommodate the winding reel 6 and the supporting clamp 9, making it convenient to carry, move and store the grounding device. Secondly, each grounding device has four clamps 9. After three clamps 9 are connected to the three-phase cable, only one clamp 9 needs to be grounded, reducing wiring operations and improving grounding efficiency. Thirdly, after the clamps 9 are put back, the winding reel 6 automatically retracts the cable 8, improving storage efficiency.

[0019] Figure 1 The front, back, left, and right sides of the grounding device are marked in the diagram to illustrate the technical solution of this embodiment. In this embodiment, the housing 3 is equipped with casters 4 on its lower side for easy movement to the work site. The housing 3 is basically a cuboid structure, with four tray frames 5, each corresponding to one of the four winding reels 6. The tray frames 5 are basically triangular in structure, providing good stability. The bottom edge of the tray frame 5 is fixedly installed at the bottom of the housing 3, and the center of the winding reel 6 is rotatably installed at the top vertex of the tray frame 5. This embodiment of the invention uses a total of four winding reels 6, with cables 8 on three of the reels 6 used to connect three-phase cables, and the remaining reel 6 used for grounding. That is, the cables 8 of the three winding reels 6 share the grounding of the cable 8 of one winding reel 6, reducing the wiring operations when grounding. Specifically, the winding reel 6 refers to the existing winding device. A conductive slip ring is installed at the center of one side of the winding reel 6. The three winding reels 6 used to connect the three-phase cables are electrically connected to the winding reel 6 used for grounding through the conductive slip ring, so that the circuit can be maintained even when the winding reel 6 rotates. When the three clamps are connected to the cables, the clamps are electrically connected to the grounded clamp through the conductive slip ring of the winding reel.

[0020] An operating method for an integrated grounding device capable of automatically retracting cables includes: Initially, such as Figure 1 The wire clamp 9 is detachably connected to the upper side of the housing 3. When the wire clamp 9 presses down on the push rod 102, the pawl 101 tilts upwards, and the first serration 12 disengages from the second serration 104. A spring 7 is installed between the reel frame 5 and the winding reel 6. Specifically, the spring 7 is a helical torsion spring. At this time, the helical torsion spring is in a free state and provides virtually no elastic force, but it still prevents the winding reel 6 from accidentally rotating and releasing the cable 8. When grounding is required, the wire clamp 9 is removed from the upper side of the housing 3. After the wire clamp 9 disengages from the upper end of the push rod 102, the pawl 101 rotates downwards under gravity. The pawl 101 pushes the push rod upwards via the lever 103, and the first serration 12 contacts the second serration. Figure 6In the state shown, the first saw tooth 12 and the second saw tooth are right-angled triangles. When the cable 8 is pulled outward and the cable 8 drives the winding reel 6 to rotate and release the cable 8, the hypotenuse of the first saw tooth 12 acts on the second saw tooth 104. The first saw tooth 12 and the second saw tooth 104 will not mesh, that is, the pawl 101 will not prevent the winding reel 6 from rotating. When the winding reel 6 rotates, it drives one end of the spring 7 to rotate. After the spring 7 twists, it generates elastic potential energy. After the external cable 8 is stopped, the direct surface of the second serration 104 of the pawl 101 acts on the first serration 12 on the outer periphery of the winding reel 6. The second serration engages with the first serration 12, preventing the winding reel 6 from rotating under the action of the spring 7. The clamps 9 connecting the three winding reels 6 are connected to the three-phase cable, and the clamp 9 connecting the remaining winding reel 6 is grounded, realizing that the three-phase cable shares a single cable 8 for grounding. The entire grounding process involves four wiring operations, resulting in higher grounding efficiency and more savings in wire. The entire device is lighter and easier to carry and store. After the operation is completed, the clamp 9 is put back on the upper side of the box 3. The clamp 9 pushes the push rod 102 downward. The lower end of the push rod pushes the pawl 101 upward through the lever. After the second serration separates from the first serration 12, as shown... Figure 3 Under the action of spring 7, the winding reel 6 rotates automatically, winding the external cable 8 into the housing 3.

[0021] As one implementation method, such as Figure 2 As shown, the wire clamp 9 includes an insulating rod 91 and a wire clamp 92 disposed at the end of the insulating rod 91. A U-shaped buckle 13 is connected to the upper side of the housing 3. The insulating rod 91 of the wire clamp 9 extends back and forth and is locked in the U-shaped buckle 13.

[0022] In this embodiment of the invention, the U-shaped buckle 13 can be made of elastic materials such as metal or plastic. The opening of the U-shaped buckle 13 faces upward, and the cross-section of the insulating rod 91 is circular, which makes it easy to insert into the U-shaped buckle 13 and easy to remove the insulating rod 91 from the U-shaped buckle 13. The wire clamp 92 can be a manual or electric clamping mechanism, which will not be described in detail.

[0023] As one implementation method, such as Figure 2 As shown, the grounding device also includes a pull rod 14 located on the front side of the enclosure 3. The lower end of the pull rod 14 is hinged to the enclosure 3, and a buckle that can be engaged with the pull rod 14 is connected to the front side of the enclosure 3.

[0024] The above settings further enhance the portability of the grounding device.

[0025] Specifically, the buckle has a structure similar to a U-shaped buckle 13, which is installed on the front side of the box 3. The pull rod 14 is basically rectangular in structure, with the lower end of the pull rod 14 hinged to the front side of the box 3. The pull rod 14 is rotated upward to a vertical position, and the pull rod 14 is engaged with the buckle. After the pull rod 14 is disengaged from the buckle, the operator can hold the upper end of the pull rod 14 and push the box 3 forward.

[0026] As one implementation, the front end of the insulating rod 91 of the wire clamp 9 does not extend beyond the front side of the housing 3, and the wire clamp 92 is located at the rear end of the insulating rod 91.

[0027] The above settings prevent workers from hitting the wire clamp 9 when pushing or pulling the box 3.

[0028] As one implementation method, see Figure 4 Four winding reels 6 are arranged in a rectangular pattern in the housing 3. Two wire holes 11 are provided on both the front and rear sides of the housing 3. The cables 8 corresponding to the two winding reels 6 on the front side are connected to the front end of the insulating rod 91 of two of the wire clamps 9 through the wire holes 11 on the front side. The cables 8 corresponding to the two winding reels 6 on the rear side are connected to the wire clamps 92 of the other two wire clamps 9 through the wire holes 11 on the rear side.

[0029] The above settings improve the structural compactness of the grounding device.

[0030] In this embodiment of the invention, four winding reels 6 are erected in the housing 3. Two winding reels 6 are coaxially arranged on the front side of the housing 3, and two winding reels 6 are coaxially arranged on the rear side of the housing 3. The cables 8 of the two front winding reels 6 are connected to the front end of two insulating rods 91 through two wire holes 11 on the front side of the housing 3. The two insulating rods 91 are provided with wires. After the cables 8 are connected to the front end of the insulating rods 91, they can be connected to the wire clamps 92 at the rear end of the insulating rods 91 through the wires. The cables 8 of the two rear winding reels 6 are connected to the wire clamps 92 at the rear end of the two insulating rods 91 through two wire holes 11 on the rear side of the housing 3.

[0031] As one implementation method, such as Figure 4 As shown, a baffle 15 is connected to the cable 8, and the baffle 15 abuts against the outside of the box 3.

[0032] The above settings prevent external dust and water from entering the housing 3.

[0033] In this embodiment of the invention, after the grounding device retracts the cable 8, the baffle 15 at the end of the cable 8 blocks the wire hole 11 to prevent external water and dust from entering the housing 3 through the wire hole 11.

[0034] As one implementation method, four casters 4 are provided, which are respectively located below the four winding reels 6. The grounding device also includes a braking mechanism 16. A braking mechanism 16 is provided between each of the four winding reels 6 and the caster 4. After the winding reel 6 releases the cable 8, the braking mechanism 16 brakes the corresponding caster 4.

[0035] With the above settings, when the grounding device is grounded, the braking mechanism 16 automatically brakes the caster 4 to prevent the housing 3 from moving, thereby preventing the housing 3 from pulling the cable clamp 9 off the cable and ensuring operational safety.

[0036] As one implementation method, such as Figure 5As shown, the universal wheel 4 includes a rotating base 41, a wheel frame 42 and a roller 43. The rotating base 41 is rotatably connected to the lower side of the housing 3. The rotating base 41 is provided with through holes 44 running vertically through the upper and lower parts. The wheel frame 42 is connected to the lower side of the rotating base 41, and the roller 43 is rotatably installed at the lower end of the wheel frame 42. See Figure 5 and Figure 7 The braking mechanism 16 includes a sleeve 161, a compression spring 162, a brake lever 163, a transmission rod 164, and a cam 165. The sleeve 161 is vertically connected to the inner wall of the bottom of the housing 3. A through hole 31 is provided at the bottom of the housing 3. The brake lever 163 vertically passes through the sleeve 161, the through hole 31, and the through hole 44. When braking, the lower end of the brake lever 163 is used to contact the roller 43. The upper and lower ends of the sleeve 161 are tapered to wrap around the brake lever 163. A boss is provided on 63, which is located inside the sleeve. A compression spring 162 is provided in the sleeve 161. The upper end of the compression spring 162 is connected to the boss of the brake lever 163, and the lower end of the compression spring 162 is connected to the lower end of the sleeve 161. The cam 165 is coaxially rotatably connected to the disc frame 5. One end of the spring 7 is connected to the winding disc 6, and the other end is connected to the cam 165. One end of the transmission rod 164 is hinged to the edge of the cam 165, and the other end is hinged to the upper end of the brake lever 163.

[0037] Initially, cable 8 is wound on reel 6, spring 7 is relaxed, compression spring 162 is extended, and the lower end of brake lever 163 disengages from roller 43, allowing roller 43 to rotate freely so that the operator can push the grounding device. After removing clamp 9 from the top of housing 3, the operator pulls cable 8 outward, causing reel 6 to rotate. When reel 6 releases cable 8 outward, it causes one end of spring 7 to rotate, and the other end of spring 7 drives cam 165 to rotate. Figure 7 Cam 165 pushes brake lever 163 downward via transmission rod 164. Compression spring 162 is compressed by the boss of brake lever 163. The lower end of brake lever 163 abuts against roller 43 to achieve braking. Brake lever 163 stops moving downward. When winding reel 6 continues to release cable 8 outward, cam 165 will not continue to rotate. During operation, roller 43 brakes to prevent housing 3 from moving. After wire clamp 9 is put back on the upper side of housing 3, winding reel 6 automatically retracts cable 8 under the action of spring 7. Compression spring 162 pushes brake lever 163 upward, spring 7 rebounds, and roller 43 can rotate again so that the operator can push housing 3.

[0038] It should be understood that those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims.

Claims

1. An integrated grounding device capable of automatically storing cables, characterized in that, Includes housing, reel frame, winding reel, cable, wire clamp, spring and anti-rotation mechanism. The winding reels are provided with four reels, which are rotatably connected to the housing via a reel frame. One winding reel is electrically connected to the other three winding reels, and cables are wound on each winding reel. The cable is connected to the corresponding clamp, the clamp is detachably connected to the upper side of the housing, and the winding reel has a first serration along its outer periphery; The anti-rotation mechanism includes a pawl and a push rod. One end of the pawl is hinged to the upper inner wall of the housing. The lower end of the pawl is provided with a second tooth that matches the first tooth. The hinged end of the pawl extends to form a lever. The push rod vertically penetrates the upper side of the housing and is slidably connected to the housing. The upper end of the push rod is used to abut against the lower side of the wire clamp, and the lower end of the push rod is used to abut against the upper side of the lever, so that the second tooth disengages from the first tooth. After the wire clamp is removed from the upper side of the housing, the pawl rotates downward under the action of gravity, and the second tooth engages with the first tooth. The spring is located between the disc frame and the winding spool.

2. The integrated grounding device for automatically storing cables according to claim 1, characterized in that, Both the first and second saw teeth are right-angled triangles.

3. The integrated grounding device for automatically storing cables according to claim 1, characterized in that, The wire clamp includes an insulating rod and a wire clamping device disposed at the end of the insulating rod. A U-shaped buckle is connected to the upper side of the housing. The insulating rod of the wire clamp extends back and forth and is used to be locked in the U-shaped buckle.

4. The integrated grounding device for automatically storing cables according to claim 3, characterized in that, The four winding reels are arranged in a rectangular pattern in the housing. Two wire holes are provided on both the front and rear sides of the housing. The cables corresponding to the two winding reels on the front side are connected to the front end of the insulating rod of two of the wire clamps through the wire holes on the front side. The cables corresponding to the two winding reels on the rear side are connected to the wire clamps of the other two wire clamps through the wire holes on the rear side.

5. An integrated grounding device capable of automatically storing cables according to claim 1, characterized in that, The grounding device also includes a pull rod disposed on the front side of the enclosure, the lower end of the pull rod being hinged to the enclosure, and a buckle connected to the front side of the enclosure for engaging with the pull rod.

6. The integrated grounding device for automatically storing cables according to claim 1, characterized in that, A baffle is connected to the cable, which is used to block the wire hole on the box.

7. An integrated grounding device capable of automatically retracting cables according to any one of claims 1-6, characterized in that, It also includes casters, which are installed on the underside of the housing.

8. An integrated grounding device for automatically storing cables according to claim 7, characterized in that, It also includes a braking mechanism. A braking mechanism is provided between each of the four winding reels and the universal wheels. After the winding reel releases the cable, the braking mechanism brakes the corresponding universal wheel. The braking mechanism includes a sleeve, a compression spring, a brake lever, a transmission rod, and a cam. The sleeve is vertically connected to the inner wall of the bottom of the housing. A through hole is provided at the bottom of the housing. The brake lever vertically passes through the sleeve and the through hole. When braking, the brake lever is used to contact the caster wheel. The sleeve has tapered ends that enclose the brake lever. The brake lever has a boss located inside the sleeve. The compression spring is located inside the sleeve. The upper end of the compression spring is connected to the boss of the brake lever, and the lower end of the compression spring is connected to the lower end of the sleeve. The cam is coaxially connected to the disc frame. One end of the spring is connected to the winding disc, and the other end is connected to the cam. One end of the transmission rod is hinged to the edge of the cam, and the other end is hinged to the upper end of the brake lever.

9. An integrated grounding device for automatically storing cables according to claim 8, characterized in that, The universal wheel includes a swivel base, a wheel frame, and rollers. The swivel base is rotatably connected to the lower side of the housing. The swivel base has through holes running vertically through it. The wheel frame is connected to the lower side of the swivel base, and the rollers are rotatably mounted on the lower end of the wheel frame. The through hole is connected to the via hole, and the brake lever is used to contact the roller.

10. A method for operating an integrated grounding device capable of automatically storing cables, characterized in that, The integrated grounding device for automatically retracting cables as described in any one of claims 1-9, the operation method comprising: Initially, the wire clamp is connected to the upper side of the box. At this time, the wire clamp presses down on the push rod, causing the pawl to lift up, the first serration to disengage from the second serration, and the spring between the reel and the winding reel is in a free state. When grounding, remove the clamp from the top of the box. After the clamp is disengaged from the upper end of the push rod, the pawl rotates downward under the action of gravity. The pawl pushes the push rod upward through the lever, and the first saw tooth contacts the second saw tooth. When the cable is pulled outward, the cable causes the winding reel to rotate and release the cable. The helical side of the first saw tooth acts on the second saw tooth. The first and second saw teeth do not mesh. When the winding reel rotates, it causes one end of the spring to rotate. The spring generates elastic potential energy after twisting. After the cable is pulled outward, the straight surface of the second saw tooth acts on the first saw tooth. The second saw tooth meshes with the first saw tooth. The clamps connected to the three winding reels are connected to the three-phase cable, and the clamp connected to the remaining winding reel is grounded. After the operation is completed, the wire clamp is reinstalled on the upper side of the box. The wire clamp pushes the push rod downwards, and the lower end of the push rod pushes the pawl upwards through the lever. After the second saw tooth separates from the first saw tooth, the winding reel automatically rotates under the action of the spring, winding the external cable into the box.

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