Safe grounding device

Abstract

A safety grounding device relates to a grounding device and comprises a manual ratchet mechanism, a grounding hook, a connecting assembly, an insulating rod, a grounding boot assembly and a grounding lead, the insulating rod is arranged in a sectional manner, the connecting assembly is fixed on the section of the insulating rod close to the grounding hook end, the grounding boot assembly is fixed on a steel rail on the ground through the manual ratchet mechanism, and the grounding boot assembly is fixed on the grounding lead. A grounding lead is connected between a grounding hook at the upper end of the insulating rod and the grounding boot assembly, and the connecting assembly and the grounding boot assembly are interlocked through a key; the use of the connecting assembly meets the length requirement of the insulating rod, wire hanging is facilitated, the key is always in the connecting assembly and cannot be taken out in the interlocking process, and the grounding operation can be completed only when the connecting assembly and the grounding boot assembly are simultaneously interlocked in the operation process, so that the operation safety is effectively ensured; the device is compact in structure and convenient to use, and avoids damage caused by use errors or negligence during power-off maintenance.

Description

Technical Field

[0001] This utility model relates to a grounding device, and more particularly to a safety grounding device. Background Technology

[0002] As is well known, to ensure the safe and stable operation of railway transportation, regular equipment inspections and maintenance are necessary, or power outages must be performed for maintenance in case of emergencies. Before each power outage maintenance, a grounding conductor must be installed to prevent personal injury caused by work performed while the power is still on, static electricity from high-voltage lines, or accidental energization of lines that have already been de-energized. However, existing ordinary grounding devices lack interlocking control logic. If used incorrectly or negligently, such as installing the grounding hook before the grounding shoe, or removing the grounding shoe before removing the grounding hook, high-voltage electricity or static electricity can seriously endanger the lives of workers. Utility Model Content

[0003] In order to overcome the shortcomings of the prior art, this utility model discloses a safety grounding device.

[0004] To achieve the aforementioned objective, this utility model adopts the following technical solution:

[0005] A safety grounding device includes a manual ratchet mechanism, a grounding hook, a connecting assembly, an insulating rod and a grounding shoe assembly, and a grounding wire. The insulating rod is segmented, and the connecting assembly is fixed on the segment of the insulating rod near the grounding hook. The grounding shoe assembly is fixed to a rail on the ground via the manual ratchet mechanism. A grounding wire is connected between the grounding hook at the upper end of the insulating rod and the grounding shoe assembly. The connecting assembly and the grounding shoe assembly are interlocked by a key.

[0006] The connecting assembly includes a female connector and a male connector. The female connector has stepped recesses A and B on its left and right ends, respectively. A positioning plate and a limiting plate are respectively located within stepped recesses A and B. A central hole is located between the bottom surfaces of stepped recesses A and B. The central hole is a series of progressively narrowing stepped holes from left to right. A lock cylinder pin is placed within the central hole. A keyhole C, corresponding to the keyhole D at the center of the positioning plate, is located on the left end face of the lock cylinder pin. The right end face passes through the limiting plate and is fixedly connected by screws. Two corresponding through holes are located on either side of the central hole, each containing a limiting post. The right end of the limiting post contacts the inner end face of the limiting plate. The male connector is a stepped cylindrical shape, with the stepped section being a threaded segment. The male connector is fixedly connected to the internal thread of the stepped recess A of the female connector via the threaded segment, and the contact ring surface on the end face of the threaded segment contacts the outer end face of the limiting post.

[0007] The aforementioned safety grounding device has a three-step stepped hole in the center hole. A compression spring is installed in the stepped hole of the second step. The lock pin in the center hole is a stepped shaft. The large-diameter section is located in the first stepped hole on the left side. The square seat at the end of the small-diameter section passes through the second and third stepped holes in sequence and is set in the square hole of the limiting plate. The screw is fixed in the screw hole in the square seat.

[0008] The safety grounding device includes a first stepped hole, a second stepped hole, and a third stepped hole connected sequentially from left to right, wherein the diameter of the second stepped hole is smaller than the diameters of the first and third stepped holes; the limiting post includes a sleeve and a long screw, the left end of the long screw is threaded into the screw hole of the sleeve, the right end of the long screw is set in the third stepped hole and its diameter is larger than the diameter of the second stepped hole, a compression spring is sleeved in the first stepped hole and on the long screw, and the left end of the sleeve passes through the hole on the positioning plate and is set in the stepped recess A.

[0009] The aforementioned safety grounding device has two countersunk holes symmetrically arranged along the circumferential direction of the positioning plate. The positioning plate is fixed to the bottom surface of the stepped recess A by countersunk screws set in the countersunk holes.

[0010] The aforementioned safety grounding device has two symmetrical arc-shaped grooves along the outer circular surface of the limiting plate, and an arc-shaped guide hole is opened along the circumference of the limiting plate. A guide post is fixed in the guide hole opened on the bottom surface of the stepped concave hole B, and the guide post passes through the guide hole.

[0011] The aforementioned safety grounding device includes a grounding shoe assembly comprising a grounding block, a grounding hook, and an interlocking component. The grounding hook is fixed to the lower part of the rail. The interlocking component is located on the upper side of the manual ratchet mechanism. A slider connected by a connecting rod is provided between the interlocking component and the connecting shaft on the handle of the manual ratchet mechanism. Both sides of the lower part of the interlocking component are provided with studs connected to the grounding block. Springs are fitted around the outside of each stud. The open end of the grounding block is clamped onto the rail. Locking nuts are provided at both ends of the studs. A vertically arranged lock hole stop is fixed outside the lock nut located on one side of the interlocking component. The lock hole stop is located inside the interlocking component and is vertically aligned with the keyhole A on the interlocking component.

[0012] The aforementioned safety grounding device includes a locking body, a connecting support block, a base plate, a lock tongue, a lock cylinder, and a lock hole stop post. The connecting support block is mounted on the gear seat of the manual ratchet mechanism via a recessed surface at its lower part and is fixed to the gear seat by countersunk screws in the countersunk screw holes on the connecting support block. Through holes A and B are respectively provided on the lower part of both sides of the connecting support block. One end of each of the two studs is fixedly connected to the inner end face of the grounding block, and the other end passes through through holes A and through holes B respectively and is slidably connected to the connecting support block and locked by nuts. The locking body is fixedly connected to the connecting hole C on the outer stepped surface of the connecting support block via connecting bolts in the connecting holes A of the two arms.

[0013] The aforementioned safety grounding device has an "n"-shaped locking body. Through grooves A and B are respectively provided between the two sides and the two arms at the bottom of the locking body. Through groove B slides with a slider, and through groove A slides with a lock hole stop. A step is formed in the lower middle part of the locking body. Mounting holes B on the top and bottom of the step correspond to mounting holes A on the base plate. A recess for placing the lock cylinder is provided on the top of the step. A keyhole A is provided between the bottom of the recess and the top of the locking body, corresponding vertically to the keyhole B on the lock cylinder. A pressure block is provided on one side of the top of the base plate. The pressure block has mounting holes A on both sides, corresponding to the mounting holes A on the base plate. The width of the pressure block is smaller than the width of the base plate, and a step is formed between the pressure block and the base plate to accommodate the lock tongue. A rotating groove is provided on one side of the lock tongue. A protruding post is fixed near the edge of the bottom surface of the lock cylinder. The protruding post is slidably disposed in the rotating groove. A groove for the lock tongue to pass through is provided in the middle of the lower part of the slider. The slider is disposed on the upper side of the base plate. The mounting holes A on the base plate and the pressure block are connected to the corresponding mounting holes B on the lower part of the step by bolts. The mounting holes B on the upper part of the step are connected to the corresponding mounting holes A on the base plate by bolts.

[0014] The aforementioned safety grounding device includes a keyhole stop post comprising a fixed post and a keyhole baffle. The lower end of the fixed post is fixed to the locking nut of the stud on the outer end face of the connecting support block. The keyhole baffle is horizontally fixed to the upper end of the vertically arranged fixed post, and the keyhole baffle is located directly above the keyhole B.

[0015] Due to the adoption of the above technical solution, this utility model has the following beneficial effects:

[0016] The safety grounding device of this utility model uses a single key to interlock the connecting component and the grounding shoe component. The connecting component meets the length requirements of the insulating rod, facilitating wire hanging. During the interlocking process, the key remains inside the connecting component and cannot be removed. The grounding operation can only be completed when both the connecting component and the grounding shoe component are interlocked simultaneously, effectively ensuring the safety of the operation. This utility model has a compact structure, is easy to use, and avoids injuries caused by incorrect use or negligence during power outage maintenance. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model.

[0018] Figure 2 This is a schematic diagram of the grounding component of this utility model.

[0019] Figure 3 This is a schematic diagram of the installation structure of the grounding boot assembly of this utility model on a manual ratchet mechanism.

[0020] Figure 4This is a schematic diagram of the internal structure of the grounding boot assembly of this utility model.

[0021] Figure 5 This is a schematic diagram of the connection structure between the handle and the grounding boot assembly of this utility model.

[0022] Figure 6 This is a structural schematic diagram of the connecting support block of this utility model.

[0023] Figure 7 This is a schematic diagram of the lock cylinder of this utility model.

[0024] Figure 8 This is a schematic diagram of the structure of the female connector of this utility model.

[0025] Figure 9 This is a schematic diagram of the internal structure of the connector of this utility model.

[0026] Figure 10 This is an exploded view of the female connector of this utility model.

[0027] Figure 11 This is a structural schematic diagram of the male connector of this utility model.

[0028] Figure 12 This is a schematic diagram of the structure of the limiting post of this utility model.

[0029] In the diagram: 1. Female connector; 2. Insulating rod; 3. Grounding wire; 4. Rail; 5. Male connector; 6. Manual ratchet mechanism; 7. Rack; 8. Through slot A; 9. Keyhole A; 10. Locking body; 11. Connecting rod; 12. Spring; 13. Grounding block; 14. Grounding hook; 15. Lock hole baffle; 16. Lock cylinder; 17. Sliding block; 18. Base plate; 19. Connecting bolt; 20. Stud; 21. Fixing post; 22. Mounting hole A; 23. Rotating groove; 24. Lock tongue; 25. Connecting support block; 26. Upper stepped surface; 27. Lower stepped surface; 28. Connecting hole A; 29. ​​Recessed hole; 30. Through slot B; 31. Mounting hole B; 32. Countersunk screw hole; 33. Screw hole; 34. Stepped surface; 35. Through hole A; 36. 37. Recessed surface; 38. Through hole B; 39. Keyhole B; 40. Protruding post; 41. Connecting shaft; 42. Stepped recessed hole A; 43. Center hole; 44. Through hole; 43.1. First step hole; 43.2. Second step hole; 43.3. Third step hole; 45. Stepped recessed hole B; 46. Guide hole; 47. Positioning plate; 48. Sleeve; 49. Compression spring; 50. Long screw; 51. Limiting plate; 52. Screw; 53. Lock cylinder pin; 54. Keyhole C; 55. Key; 56. Guide post; 57. Guide hole; 58. Arc groove; 59. Square hole; 60. Connecting hole B; 61. Keyhole D; 62. Contact ring surface; 63. Threaded section; 64. Countersunk hole; 65. Pressure block; 66. Connecting hole C; 67. Locking post. Detailed Implementation

[0030] The present invention will be explained in detail through the following embodiments. The purpose of disclosing the present invention is to protect all technical improvements within the scope of the present invention.

[0031] Combined with appendix Figure 1-12 The safety grounding device includes a manual ratchet mechanism 6, a grounding hook, a connecting assembly, an insulating rod 2, a grounding shoe assembly, and a grounding wire 3. The insulating rod 2 is segmented, and the connecting assembly is fixed on the segment of the insulating rod near the grounding hook. The grounding shoe assembly is fixed to the ground rail 4 via the manual ratchet mechanism 6. The grounding wire 3 is connected between the upper end of the insulating rod 2 and the grounding shoe assembly. The connecting assembly and the grounding shoe assembly are interlocked by a key 54.

[0032] As attached Figure 1 As shown, the manual ratchet mechanism 6 is existing technology, and the specific connection structure will not be described in detail. For segmented insulating rods 2, only the end near the grounding hook needs to use this connection component. If it is multi-segmented, the end near the grounding hook needs to use this connection component, and the other adjacent insulating rod segments can be fixedly connected by existing connectors. The rail 4 is located on the sleepers. When in use, the grounding shoe assembly is clipped onto the rail 4 between the two sleepers. The grounding wire 3 is a copper wire, and both ends are fixedly connected to the grounding hook and the grounding shoe connection position by bolts respectively.

[0033] like Figure 8-12As shown, the connecting assembly includes a female connector 1 and a male connector 5. The left and right end faces of the female connector 1 are respectively provided with stepped recessed holes A41 and B44. A positioning plate 46 and a limiting plate 50 are respectively provided on the bottom steps of the stepped recessed holes A41 and B44. A central hole 42 is provided in the middle between the bottom surfaces of the stepped recessed holes A41 and B44. The central hole 42 is a stepped hole that tapers sequentially from left to right. A lock cylinder pin 52 is placed inside the central hole 42. A keyhole C53 corresponding to the keyhole D60 at the center of the positioning plate 46 is provided on the left end face of the lock cylinder pin 52. The right end face passes through the limiting plate 50 and is fixedly connected by a screw 51. Two corresponding through holes 43 are provided on both sides of the central hole 42, and a lock cylinder pin is inserted into each through hole 43. The limiting post has its right end in contact with the inner end face of the limiting plate 50. The male connector 5 is a stepped cylindrical shape, with the stepped section being a threaded section 62. The male connector 5 is fixedly connected to the internal thread of the stepped recessed hole A41 of the female connector 1 through the threaded section 62, and the contact ring surface on the end face of the threaded section 62 is in contact with the outer end face of the limiting post. Two countersunk holes 63 are symmetrically provided along the circumferential direction of the circumferential surface of the positioning plate 46. The positioning plate 46 is fixed to the bottom surface of the stepped recessed hole A41 by countersunk screws provided in the countersunk holes 63. Two arc-shaped grooves 57 are symmetrically provided along the outer circular surface of the limiting plate 50. An arc-shaped guide hole 56 is opened along the circumferential surface of the limiting plate 50. A guide post 55 is fixed in the guide hole 45 opened on the bottom surface of the stepped recessed hole B44. The guide post 55 passes through the guide hole 45.

[0034] When connecting the female connector 1 and the male connector 5, an insulating rod section is inserted into the outer hole of the stepped recess B44 and fixedly connected by a bolt in the connecting hole B59. The threaded section 62 of the male connector 5 is tightened into the outer threaded hole of the stepped recess A41 of the female connector 1. An insulating rod section is fixed at the lower part of the male connector 5. After fixing the female connector 1 and the male connector 5, the length of the entire insulating rod 2 is increased, which makes it easier to hang the grounding wire.

[0035] Specifically, the stepped hole of the center hole 42 has three steps. A compression spring 48 is installed in the stepped hole of the second step. The lock core pin 52 in the center hole 42 is a stepped shaft. The large diameter section is located in the first stepped hole on the left. The square seat at the end of the small diameter section passes through the second and third stepped holes and is set in the square hole 58 of the limit plate 50. The screw 51 is fixed in the screw hole in the square seat.

[0036] Specifically, the through hole 43 includes a first stepped hole 43.1, a second stepped hole 43.2, and a third stepped hole 43.3 connected sequentially from left to right, wherein the diameter of the second stepped hole 43.2 is smaller than the diameters of the first stepped hole 43.1 and the third stepped hole 43.3; the limiting post includes a sleeve 47 and a long screw 49, the left end of the long screw 49 is threaded into the screw hole of the sleeve 47, the right end of the long thread 49 is set in the third stepped hole 43.3 and its diameter is larger than the diameter of the second stepped hole 43.2, a compression spring 48 is sleeved in the first stepped hole 43.1 and on the long thread 49, and the left end of the sleeve 47 passes through the hole on the positioning plate 46 and is set in the stepped recess A4.

[0037] As attached Figure 2-7 As shown, the grounding shoe assembly includes a grounding block 13, a grounding hook 14, and an interlocking component. The grounding hook 14 is fixed to the lower part of the rail 4. The interlocking component is located on the upper side of the manual ratchet mechanism 6. A slider 17 connected by a connecting rod 11 is provided between the interlocking component and the connecting shaft 40 on the handle of the manual ratchet mechanism 6. Both sides of the lower part of the interlocking component are provided with studs 20 connected to the grounding block 13. Springs 12 are fitted on the outside of each stud 20. The open end of the grounding block 13 is clamped onto the rail 4. When the stud 20 is close to the rail 4, the grounding shoe assembly is clamped to the grounding block 13. Both ends of the interlocking component are equipped with locking nuts. A vertically arranged lock hole stop is fixed outside the locking nut on one side of the interlocking component. The lock hole stop is located inside the interlocking component and is vertically aligned with the keyhole A9 on the interlocking component. The lock hole stop includes a fixing post 21 and a lock hole baffle 15. The lower end of the fixing post 21 is fixed to the locking nut on the outer end face of the connecting support block 25. The lock hole baffle 15 is horizontally fixed to the upper end of the vertically arranged fixing post 21 and is located directly above the keyhole B38.

[0038] Specifically, the interlocking components include a locking body 10, a connecting support block 25, a base plate 18, a lock tongue 24, a lock cylinder 16, and a lock hole stop post. The connecting support block 25 is mounted on the gear seat of the manual ratchet mechanism 6 through the lower recessed surface 36, and is fixed to the gear seat by countersunk screws in the countersunk screw holes 32 on the top of the connecting support block 25. Through holes A35 and B37 are respectively provided on the lower part of both sides of the connecting support block 25. One end of each of the two studs 20 is fixedly connected to the inner end face of the grounding block 13, and the other end passes through the through holes A35 and B37 respectively and is slidably connected to the connecting support block 25, and is locked by nuts. The locking body 10 is fixedly connected to the connecting hole C65 on the outer stepped surface 34 of the connecting support block 25 through the connecting bolts 19 in the connecting holes A28 of the two arms.

[0039] Specifically, the locking body 10 is n-shaped. Through grooves A8 and B30 are respectively provided between the two sides and the two arms at the bottom of the locking body 10. Through groove B30 slides with the slider 17, and through groove A8 slides with the lock hole stop. The lower middle part of the locking body 10 is set as a step. The mounting holes B31 on the upper part 26 and the lower part 27 of the step correspond to the mounting holes A22 on the base plate 18. A recessed hole 29 for placing the lock cylinder 16 is provided on the upper part 26 of the step. A keyhole A9 is provided between the bottom surface of the recessed hole 29 and the upper surface of the locking body 10. The keyhole A9 corresponds vertically to the keyhole B38 on the lock cylinder 16. A pressure block 64 is provided on one side of the upper part of the base plate 18. Mounting holes A22 are provided on both sides of the pressure block 64, corresponding to the mounting holes A22 on the base plate 18. The width of the pressure block 64 is smaller than the width of the base plate 18, and a step for placing the lock tongue 24 is formed between the pressure block 64 and the base plate 18. A rotating groove 23 is provided on one side of the lock tongue 24. A protruding post 39 is fixed near the edge of the bottom surface of the lock cylinder 16. The protruding post 39 is slidably disposed in the rotating groove 23. A groove for the lock tongue 24 is provided in the middle of the lower part of the slider 17. The slider 17 is disposed on the upper side of the base plate 18. The mounting holes A22 on the base plate 18 and the pressure block 64 are connected to the corresponding mounting holes B31 on the lower part of the step 27 by bolts. The mounting holes B31 on the upper part of the step 26 are connected to the corresponding mounting holes A22 on the base plate 18 by bolts. A recessed groove is provided on the lower bottom surface of the key 54, which cooperates with the lock post 64 in the key hole B38 of the lock cylinder 16. Turning the key 54 causes the lock cylinder 16 to rotate.

[0040] The method of using the aforementioned safety grounding device specifically includes the following steps:

[0041] Step a: Secure the hook end of the grounding hook 14 to one side of the rail 4, manually operate the ratchet mechanism 6, and crank the handle to drive the pawl on the manual ratchet mechanism 6 to rotate the ratchet. The ratchet meshes with the teeth on the rack 7, causing the ratchet seat to move on the rack 7, so that the grounding block 13 gradually approaches the rail 4. During the process of the latch on the grounding block 13 contacting and locking the rail 4, the connecting support block 25 moves towards the grounding block 13. At this time, the spring 12 is compressed, and the stud 20 and the lock hole stop remain stationary, disengaging from the through groove A8 of the moving locking body 10, so that the lock hole baffle 15 of the lock hole stop no longer blocks the keyhole B38 on the lock cylinder 16.

[0042] Step b: With key 54 in keyhole A9, rotate 180° to the removal position. At this time, the protrusion 39 at the bottom of lock cylinder 16 slides in the rotating groove 23, causing the bolt 24 to move towards the slider 17 and insert into the groove under the slider 17, limiting the handle of the manual ratchet mechanism 6, and then key 54 can be removed.

[0043] Step c: Insert the removed key 54 into the keyhole D60 of the positioning plate 46 on the connecting female head 1 and the keyhole C53 of the lock cylinder pin 52 in sequence. Rotate the key 54 90° to drive the lock cylinder pin 52 and the limiting plate 50 to rotate. At this time, the arc groove 57 on the limiting plate 50 corresponds to the two limiting posts. Screw the threaded section 62 of the connecting male head into the stepped concave hole A41. The contact ring surface 61 on the threaded section 62 presses against the edge of the outer end of the sleeve 47 of the two limiting posts. While screwing in, the two limiting posts extend out from the arc groove 57. The key 54 remains in the connecting female head 1 and cannot be removed. Due to the increase in the height of the entire insulating rod 2, the usage requirements are met. The grounding hook at the upper end of the insulating rod 2 can be hung on the high voltage line to realize the operation process.

[0044] Step d: When the interlock needs to be released, remove the grounding hook from the high-voltage line, rotate the threaded section 62 of the male connector 5 in the reverse direction to separate the male connector 5 from the female connector 1. Under the reaction force of the compression spring 48, the two limit pins exit the arc groove 57 and return to their original state. Rotate the key 54 in the reverse direction to the key removal position. At this time, the lock cylinder pin 52 and the limit plate 50 rotate, so that the arc groove 57 on the limit plate 50 no longer corresponds to the two limit pins. Then, pull out the key.

[0045] Step e: Insert key 54 into keyhole A9 and keyhole B38 from top to bottom. Rotate key 54 in the opposite direction. The protrusion 39 is eccentrically set relative to the bottom surface of lock cylinder 16. The protrusion 39 on the bottom surface of lock cylinder 16 drives the rotating groove 23 to move the bolt 24 and disengage it from the groove under slider 17. The handle limit can then be released. Press the handle down in the opposite direction. At the same time, the pawl and ratchet disengage. Pull the handle to one side to move the ratchet seat and grounding block 13 together, so that the grounding block 13 disengages from the rail 4. At the same time, the lock hole stop enters the through groove A8 of the locking body 10, blocking the keyhole B38 on lock cylinder 16. At this time, key 54 cannot be removed. Remove the grounding shoe assembly from the rail to complete the operation.

[0046] When using this device for the first time, the key needs to be inserted into the keyhole of the grounding boot assembly during assembly, or a special tool needs to be used to insert the key.

[0047] The parts of this utility model not described in detail are existing technologies.

[0048] The embodiments selected herein for the purpose of disclosing the utility model are currently considered suitable; however, it should be understood that the present invention is intended to include all variations and modifications of the embodiments that fall within the scope of the present concept and utility model.

Claims

1. A safety grounding device, comprising a manual ratchet mechanism, a grounding hook, a connecting assembly, an insulating rod and a grounding shoe assembly, and a grounding conductor, characterized in that: The insulating rod is segmented. The connecting component is fixed on the segment of the insulating rod near the grounding hook. The grounding shoe assembly is fixed to the rail on the ground by a manual ratchet mechanism. A grounding wire is connected between the grounding hook at the upper end of the insulating rod and the grounding shoe assembly. The connecting component and the grounding shoe assembly are interlocked by a key. The connecting assembly includes a female connector and a male connector. The female connector has stepped recesses A and B on its left and right ends, respectively. A positioning plate and a limiting plate are respectively located within stepped recesses A and B. A central hole is located between the bottom surfaces of stepped recesses A and B. The central hole is a series of progressively narrowing stepped holes from left to right. A lock cylinder pin is placed within the central hole. A keyhole C, corresponding to the keyhole D at the center of the positioning plate, is located on the left end face of the lock cylinder pin. The right end face passes through the limiting plate and is fixedly connected by screws. Two corresponding through holes are located on either side of the central hole, each containing a limiting post. The right end of the limiting post contacts the inner end face of the limiting plate. The male connector is a stepped cylindrical shape, with the stepped section being a threaded segment. The male connector is fixedly connected to the internal thread of the stepped recess A of the female connector via the threaded segment, and the contact ring surface on the end face of the threaded segment contacts the outer end face of the limiting post.

2. The safety grounding device according to claim 1, characterized in that: The stepped hole of the center hole has three steps. A compression spring is installed in the stepped hole of the second step. The lock core pin in the center hole is the stepped shaft. The large diameter section is located in the first stepped hole on the left. The square seat at the end of the small diameter section passes through the second and third stepped holes in sequence and is set in the square hole of the limiting plate. The screw is fixed in the screw hole in the square seat.

3. The safety grounding device according to claim 1, characterized in that: The perforation includes a first stepped hole, a second stepped hole, and a third stepped hole connected sequentially from left to right, wherein the diameter of the second stepped hole is smaller than the diameters of the first and third stepped holes; the limiting post includes a sleeve and a long screw, the left end of the long screw is threaded into the screw hole of the sleeve, the right end of the long screw is set in the third stepped hole and its diameter is larger than the diameter of the second stepped hole, a compression spring is sleeved in the first stepped hole and on the long screw, and the left end of the sleeve passes through the hole on the positioning plate and is set in the stepped recess A.

4. The safety grounding device according to claim 1, characterized in that: Two countersunk holes are symmetrically provided along the circumferential direction of the positioning plate. The positioning plate is fixed to the bottom surface of the stepped recess A by countersunk screws installed in the countersunk holes.

5. The safety grounding device according to claim 1, characterized in that: Two arc-shaped grooves are symmetrically arranged on the outer circular surface of the limiting plate, and an arc-shaped guide hole is opened on the circumference of the limiting plate. A guide post is fixed in the guide hole opened on the bottom surface of the stepped concave hole B, and the guide post passes through the guide hole.

6. The safety grounding device according to claim 1, characterized in that: The grounding shoe assembly includes a grounding block, a grounding hook, and an interlocking component. The grounding hook is fixed to the lower part of the rail. The interlocking component is located on the upper side of the manual ratchet mechanism. A slider connected by a connecting rod is provided between the interlocking component and the connecting shaft on the handle of the manual ratchet mechanism. Both sides of the lower part of the interlocking component are provided with studs connected to the grounding block. Springs are fitted on the outside of each stud. The open end of the grounding block is clamped onto the rail. Locking nuts are provided at both ends of the studs. A vertically arranged lock hole stop is fixed outside the lock nut located on one side of the interlocking component. The lock hole stop is located inside the interlocking component and is vertically aligned with the keyhole A on the interlocking component.

7. The safety grounding device according to claim 6, characterized in that: The interlocking components include a locking body, a connecting support block, a base plate, a lock tongue, a lock cylinder, and a lock hole stop. The connecting support block is mounted on the gear seat of the manual ratchet mechanism via a recessed surface at its lower part and is fixed to the gear seat by countersunk screws in the countersunk screw holes on the connecting support block. Through holes A and B are respectively provided on the lower part of both sides of the connecting support block. One end of each of the two studs is fixedly connected to the inner end face of the grounding block, and the other end passes through through holes A and through holes B respectively and is slidably connected to the connecting support block and locked by nuts. The locking body is fixedly connected to the connecting hole C on the outer stepped surface of the connecting support block via connecting bolts in the connecting holes A of the two arms.

8. The safety grounding device according to claim 7, characterized in that: The locking body is "n"-shaped. Through grooves A and B are respectively provided between the two sides and the two arms at the bottom of the locking body. Through groove B is slidably engaged with the slider, and through groove A is slidably engaged with the lock hole stop. A step is formed in the lower middle part of the locking body. Mounting holes B on the top and bottom of the step correspond to mounting holes A on the base plate. A recessed hole for placing the lock cylinder is provided on the top of the step. A keyhole A is provided between the bottom of the recessed hole and the top of the locking body, corresponding vertically to the keyhole B on the lock cylinder. A pressure block is provided on one side of the top of the base plate. Each component has a mounting hole A, which corresponds to the mounting hole A on the base plate. The width of the pressure block is smaller than the width of the base plate, and a step is formed between the pressure block and the base plate to accommodate the lock tongue. A rotating groove is provided on one side of the lock tongue. A protruding post is fixed near the edge of the bottom surface of the lock cylinder, and the protruding post is slidably disposed in the rotating groove. A groove for the lock tongue to pass through is provided in the middle of the lower part of the slider. The slider is disposed on the upper side of the base plate. The mounting holes A on the base plate and the pressure block are connected to the corresponding mounting holes B on the lower part of the step by bolts. The mounting holes B on the upper part of the step are connected to the corresponding mounting holes A on the base plate by bolts.

9. The safety grounding device according to claim 7, characterized in that: The keyhole stop includes a fixed post and a keyhole baffle. The lower end of the fixed post is fixed to the locking nut of the stud on the outer end face of the connecting support block. The keyhole baffle is horizontally fixed to the upper end of the vertically set fixed post, and the keyhole baffle is located directly above the keyhole B.

Images