Grounding clamp with reliable connection

Abstract

The application discloses a reliable grounding wire clamp, which comprises a clamp body, an upper clamping plate fixedly connected to the top end of the clamp body and slidably connected with a lower clamping plate, a pull plate elastically slidably connected to the upper clamping plate, a screw rod and a driving rod slidably connected in the clamp body and rotatably connected with the lower clamping plate, a driving handle slidably connected to the end of the driving rod and insertable into the clamp body, the driving rod coaxially sleeved with the screw rod, a top cap slidably connected to the top end of the screw rod and elastically connected with the lower clamping plate, a clamping plate elastically arranged in the top cap and insertable into the driving rod, and a nut threadedly connected to the surface of the screw rod and slidably connected with the clamp body.

Description

Technical Field

[0001] This invention relates to the field of wire clamp technology, specifically to a reliable grounding wire clamp. Background Technology

[0002] A grounding clamp is a device used to ensure safe grounding during the maintenance of high-voltage power equipment. It is mainly used to reliably connect the grounding wire to the cable or conductor.

[0003] Chinese patent CN107104296A discloses a multi-purpose combined grounding clamp assembly, including a clamp body, a screw, and an operating rod, and a pair of clamping molds directly / indirectly connected to the clamp body. The clamp body includes a movable component and a C-shaped fixed component. The upper and lower side plates of the fixed component are arranged in parallel. The movable component is connected to the opening of the fixed component. The screw passes through the lower side plate of the fixed component and is integrated with the movable component. The operating rod causes the screw to rotate. The screw only rotates without undulating, allowing the movable component to move stably up and down. The clamp body has a grounding lead connection hole. The up and down movement of the movable component causes the functional mold directly connected to the clamp body to clamp the wire vertically, and the clamping mold indirectly connected to the clamp body to clamp the wire horizontally. The operating rod and the screw are detachably connected as one unit, which not only prevents the clamp body from falling off but also increases the clamping force of the clamp body. Various clamping molds share a single fixed component of the clamp body, making it versatile.

[0004] However, in the above-mentioned patent, the overall clamping force of the device comes entirely from the threaded engagement between the screw and the moving component, and the whole lacks an effective auxiliary locking mechanism. If vibration occurs during operation and causes the screw to rotate slightly, the clamping force will be significantly reduced, resulting in insufficient reliability of the whole under the condition of severe wire vibration, which is not conducive to the long-term stable use of the whole device. Summary of the Invention

[0005] The purpose of this invention is to provide a reliable grounding clamp to solve the problems mentioned in the background art, such as easy loosening of bolts leading to reduced clamping force and insufficient overall reliability.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a reliable grounding clamp, comprising a clamp body, an upper clamp plate fixedly connected to its top end and a lower clamp plate slidably connected thereto, a pull plate elastically slidably connected to the upper clamp plate, a screw and a drive rod slidably connected to the lower clamp plate within the clamp body, a drive handle that can be inserted into the clamp body being slidably connected to the end of the drive rod, the drive rod being coaxially sleeved inside the screw, a top cap slidably connected to the top end of the screw, the top cap being elastically slidably connected to the lower clamp plate and protruding from the upper surface of the lower clamp plate, a retaining plate that can be inserted into the drive rod being elastically provided inside the top cap, and a nut that is slidably connected to the clamp body being threaded onto the surface of the screw, the sliding distance of the nut being equal to the sliding distance of the lower clamp plate; The bottom inner side of the clamp body is V-shaped. A sliding frame is elastically slidably connected inside the clamp body. The sliding frame is hinged to a drive plate and a fixed plate. The other end of the drive plate is hinged to the lower clamp plate. The other end of the fixed plate is hinged to a rotating shaft that is slidably connected to the clamp body. One end of the rotating shaft is fixedly connected to a limiting ring that is slidably connected to a screw, and the other end is fixedly connected to a trigger plate. The sliding distance of the rotating shaft is greater than the sliding distance of the lower clamp plate.

[0007] As a further embodiment of the present invention: the upper clamping plate is located at the top of the clamping body, and a sliding groove is provided in the middle of the upper clamping plate. A spring is fixedly connected in the sliding groove, and a sliding plate is fixedly connected to the end of the spring away from the upper clamping plate. The two ends of the sliding plate are fixedly connected to the pull plate, and the sliding plate is slidably connected to the sliding groove. The pull plate is in the shape of a c, and the end of the pull plate away from the sliding plate is located directly below the trigger plate. The pull plate is slidably connected to the clamping body.

[0008] The clamping operation can be performed by using the upper and lower clamping plates. The movement of the pull plate can trigger the components related to the trigger plate, thereby performing the clamping operation.

[0009] As a further aspect of the present invention: a guide groove is provided in the body of the wire clamp, and a plurality of evenly arranged guide posts are fixedly connected in the guide groove. The lower ends of the guide posts pass through the body of the wire clamp and are inserted into the surface of the drive handle. The nut is located in the guide groove and is slidably connected to the guide post.

[0010] As a further aspect of the present invention: the side of the clamp body is threaded with a wiring bolt, the lower clamp plate is slidably connected to the inner wall of the clamp body, a trigger groove is provided on the side of the clamp body, the rotating shaft is slidably connected to the trigger groove, and the height of the bottom end of the trigger groove is lower than the height of the bottom surface of the inner cavity of the clamp body.

[0011] The nut is limited and guided by the guide post in the guide groove, and is used to lock it in place with the drive handle; at the same time, the trigger groove, which is located below the bottom of the inner cavity, provides further downward space for the rotating shaft to ensure the movement stroke of the fixed plate.

[0012] As a further aspect of the present invention: two symmetrically arranged sliding frames are horizontally slidably connected within the body of the wire clamp. A second spring is fixedly connected to the side of the sliding frame. The end of the second spring away from the sliding frame is fixedly connected to the inner wall of the wire clamp body. In the initial state, the second spring is in a compressed state. The outer and inner sides of the sliding frame are respectively hinged to one end of the drive plate and the fixed plate.

[0013] As a further aspect of the present invention: the limiting ring is slidably sleeved on the surface of the screw, and a rotating shaft is fixedly connected to the surface of the limiting ring. The rotating shaft passes through the fixing plate and the trigger groove in sequence and is fixedly connected to the trigger plate.

[0014] Spring 2 provides initial compression energy to the slide frame, and the slide frame is hinged to the drive plate and the fixed plate respectively, so as to realize the synchronous reverse sliding of the two slide frames to drive the fixed plate to swing. At the same time, the motion of the fixed plate is transmitted to the trigger plate through the limit ring, realizing the linkage between the swing of the fixed plate and the up and down movement of the trigger plate.

[0015] As a further aspect of the present invention: the top cap is slidably connected to the lower clamping plate, a limiting rod is fixedly connected inside the top cap, a spring four is provided inside the lower end of the limiting rod, two clamping plates are symmetrically arranged, the two ends of the spring four are fixedly connected to the two clamping plates respectively, the end of the clamping plate away from the limiting rod is arc-shaped, the clamping plate is slidably connected to the limiting rod, and a spring three is sleeved on the surface of the limiting rod.

[0016] As a further aspect of the present invention: a plurality of evenly arranged connecting posts are fixedly connected to the lower end of the top cap, the connecting posts are slidably connected to the screw, the inner side of the top cap is slidably sleeved with the surface of the drive rod, one end of the spring three is fixedly connected to the top cap, and the other end is fixedly connected to the drive rod. In the initial state, the spring three is in a compressed state, and a conical groove is opened at the top end of the drive rod, and a fixing groove matching the two clamping plates is opened in the conical groove.

[0017] As a further aspect of the present invention: the drive rod is rotatably connected to the screw, a limiting groove is formed at the bottom of the drive rod, a spline is slidably connected in the limiting groove, the spline is fixedly connected to the drive handle, and the drive handle is slidably connected to the surface of the screw.

[0018] The symmetrically arranged arc-shaped retaining plates inside the top cap, in conjunction with the four springs, allow the retaining plates to elastically extend and retract, thus adaptively inserting into the tapered groove and fixed groove at the top of the drive rod. Simultaneously, the drive rod is fixedly connected to the drive handle via a spline slidingly connected in the bottom limiting groove, achieving synchronous circumferential rotation and relative axial sliding between the drive rod and the drive handle, which is used to control the engagement and disengagement of the drive handle and the screw.

[0019] Compared with the prior art, the beneficial effects of the present invention are: 1. Through the linkage mechanism between the sliding frame, the drive plate and the fixed plate, and with the energy storage of the second spring, the operator only needs to align the upper clamping plate and the lower clamping plate with the cable and quickly pull the device to quickly and automatically pre-clamp the cable through the upper clamping plate and the lower clamping plate. The whole process does not require rotation, which is suitable for high-altitude single-handed operation and effectively improves safety and convenience. 2. Slide the drive handle upwards to engage its top with the guide post, then lock the drive handle and nut together with the guide post. At the same time, the drive handle locks the drive rod with a spline, and the drive rod locks the top cap and screw, thus achieving complete locking of the screw position. At this point, the screw cannot rotate even if the wire vibrates, thus preventing the wire clamp from loosening due to vibration or shaking. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the internal structure of the wire clamp body of the present invention; Figure 3 This is a schematic diagram of the screw structure of the present invention; Figure 4 This is a schematic diagram of the top cap structure of the present invention; Figure 5 This is a schematic diagram of the fixing plate structure of the present invention; Figure 6 This is a schematic diagram of the limiting ring structure of the present invention; Figure 7 This is a schematic diagram of the drive handle structure of the present invention; Figure 8 This is a schematic diagram of the internal structure of the cap of the present invention; Figure 9 This is a schematic diagram of the internal structure of the drive rod of the present invention.

[0021] In the diagram: 1. Cable clamp body; 11. Guide groove; 12. Guide post; 13. Nut; 14. Trigger groove; 2. Wiring bolt; 3. Upper clamp plate; 31. Slide groove; 32. Spring 1; 33. Slide plate; 34. Pull plate; 4. Lower clamp plate; 41. Drive plate; 42. Slide frame; 43. Spring 2; 44. Fixing plate; 45. Rotating shaft; 46. Limiting ring; 47. Trigger plate; 5. Top cap; 51. Limiting rod; 52. Clamping plate; 53. Spring 3; 54. Connecting post; 55. Spring 4; 6. Screw; 7. Drive rod; 71. Conical groove; 72. Fixing groove; 73. Limiting groove; 8. Drive handle; 9. Spline. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] Please see Figure 1-9 This invention provides a technical solution: a reliable grounding clamp, comprising a clamp body 1, with an upper clamping plate 3 fixedly connected to its top and a lower clamping plate 4 slidably connected thereto. The upper and lower clamping plates 3 and 4 can clamp cables. A pull plate 34 is elastically slidably connected to the upper clamping plate 3. A screw 6 and a drive rod 7, rotatably connected to the lower clamping plate 4, are slidably connected inside the clamp body 1. The drive rod 7 drives the screw 6 to rotate during tightening. A drive handle 8, which can be inserted into the clamp body 1, is slidably connected to the end of the drive rod 7, facilitating operation by the worker. The moving rod 7 is coaxially sleeved inside the screw 6 and the two are rotatably connected. The top of the screw 6 is slidably connected to a top cap 5. The top cap 5 is elastically slidably connected to the lower clamping plate 4, so as to protrude from the upper surface of the lower clamping plate 4 and thus contact the cable before the lower clamping plate 4. The top cap 5 is elastically provided with a clamping plate 52 that can be inserted into the driving rod 7. The surface of the screw 6 is threadedly connected to a nut 13 that is slidably connected to the clamp body 1. The nut 13 facilitates the tightening operation. The sliding distance of the nut 13 is equal to the sliding distance of the lower clamping plate 4. At this time, the nut 13 can move synchronously with the lower clamping plate 4 through the screw 6.

[0024] The bottom inner side of the clamp body 1 is V-shaped, which provides a reserved space for the self-locking of the fixing plate 44. A sliding frame 42 is elastically slidably connected inside the clamp body 1. The sliding frame 42 is hinged to the drive plate 41 and the fixing plate 44. The angle between the fixing plate 44 and the drive plate 41 is adjusted by moving the sliding frame 42. The other end of the drive plate 41 is hinged to the lower clamping plate 4. The other end of the fixing plate 44 is hinged to the rotating shaft 45, which is slidably connected to the clamp body 1. When the sliding frame 42 moves, the rotating shaft 45 and the lower clamping plate 4 can move accordingly. One end of the rotating shaft 45 is fixedly connected to a limiting ring 46 that is slidably connected to the screw 6, and the other end is fixedly connected to a trigger plate 47. The sliding distance of the rotating shaft 45 is greater than the sliding distance of the lower clamping plate 4, so as to ensure that the rotating shaft 45 can still be driven downward by external force when the lower clamping plate 4 reaches the lowest position.

[0025] The upper clamp 3 is located at the top of the wire clamp body 1 and the two are integrated to enhance the overall strength. A groove 31 is provided in the middle of the upper clamp 3, and a spring 32 is fixedly connected inside the groove 31. A sliding plate 33 is fixedly connected to the end of the spring 32 away from the upper clamp 3. When the sliding plate 33 moves up and down, the spring 32 extends and retracts accordingly. Both ends of the sliding plate 33 are fixedly connected to the pull plate 34, and the sliding plate 33 is slidably connected to the groove 31. The pull plate 34 is U-shaped, and the end of the pull plate 34 away from the sliding plate 33 is located directly below the trigger plate 47. When the trigger plate 47 moves down, it can drive the pull plate 34 to move. Simultaneously, the movement of the pull plate 34 can also... The corresponding structure of the trigger plate 47 is triggered. The pull plate 34 and the wire clamp body 1 are slidably connected by several protrusions. The wire clamp body 1 is provided with a guide groove 11. Several evenly arranged guide posts 12 are fixedly connected in the guide groove 11. The lower end of the guide post 12 passes through the wire clamp body 1 and is inserted into the surface of the drive handle 8. The insertion position of the drive handle 8 is provided with a damping surface to facilitate the adjustment of the position of the drive handle 8. The nut 13 is located in the guide groove 11 and is slidably connected to the guide post 12. The nut 13 can be set as polygonal or circular. The nut 13 is limited by the guide post 12. At this time, the nut 13 cannot rotate.

[0026] A wiring bolt 2 is threadedly connected to the side of the clamp body 1, facilitating quick connection of ground wires and other cables. The lower clamp plate 4 is slidably connected to the inner wall of the clamp body 1. A trigger groove 14 is provided on the side of the clamp body 1, and a rotating shaft 45 is slidably connected to the trigger groove 14. The trigger groove 14 can limit and guide the movement of the rotating shaft 45. The bottom of the trigger groove 14 is lower than the bottom of the inner cavity of the clamp body 1, ensuring that the rotating shaft 45 can drive the fixed plate 44 to move and form a downward-pointing angle. Two symmetrically arranged sliding frames 42 are horizontally slidably connected inside the clamp body 1. A second spring 43 is fixedly connected to the side of the sliding frame 42. The end of the second spring 43 away from the sliding frame 42 is connected to the clamp body. The inner wall of 1 is fixedly connected. In the initial state, the second spring 43 is in a compressed state and the upper clamping plate 3 and the lower clamping plate 4 are in close contact. The outer and inner sides of the sliding frame 42 are respectively hinged to one end of the drive plate 41 and the fixed plate 44. When the sliding frame 42 moves, the drive plate 41 and the fixed plate 44 rotate in opposite directions. At this time, the fixed plate 44 can drive the limiting ring 46 to move through the rotating shaft 45. The limiting ring 46 is slidably sleeved on the surface of the screw 6. The screw 6 guides the limiting ring 46. The rotating shaft 45 is fixedly connected to the surface of the limiting ring 46. The rotating shaft 45 passes through the fixed plate 44 and the trigger groove 14 in sequence and is fixedly connected to the trigger plate 47. At this time, when the rotating shaft 45 and the limiting ring 46 move up and down, the trigger plate 47 can move up and down accordingly.

[0027] The top cap 5 is slidably connected to the lower clamping plate 4 and the two can rotate relative to each other. A limit rod 51 is fixedly connected inside the top cap 5. A spring 55 is installed inside the lower end of the limit rod 51. Two clamping plates 52 are symmetrically arranged. The two ends of the spring 55 are fixedly connected to the two clamping plates 52 respectively. The spring 55 can provide a pre-tightening force to the clamping plates 52. The end of the clamping plate 52 away from the limit rod 51 is arc-shaped and the arc surface slopes downward to facilitate the compression of the conical groove 71. The clamping plate 52 is slidably connected to the limit rod 51. At this time, the clamping plate 52 can be retracted into the limit rod 51 by compressing the spring 55. A spring 53 is sleeved on the surface of the limit rod 51. Several evenly arranged connecting posts 54 are fixedly connected to the lower end of the top cap 5. The connecting posts 54 are slidably connected to the screw 6. At this time, the top cap 5 can drive the screw 6 to rotate through the connecting posts 54 without affecting the relative sliding of the two. The inner side of the top cap 5 is connected to the drive The rod 7 is slidably sleeved on the surface. One end of the spring 3 53 is fixedly connected to the top cap 5, and the other end is fixedly connected to the drive rod 7. In the initial state, the spring 3 53 is in a compressed state. The spring 3 53 can ensure that the top cap 5 is always in a convex state during the downward movement of the lower clamping plate 4. The top of the drive rod 7 has a tapered groove 71. The tapered groove 71 has a fixing groove 72 that matches the two clamping plates 52. The fixing groove 72 can limit the clamping plates 52. The drive rod 7 and the screw 6 are rotatably connected through bearings, etc. The bottom of the drive rod 7 has a limiting groove 73. The limiting groove 73 is slidably connected to a spline 9. The spline 9 can make the drive rod 7 and the drive handle 8 slide relative to each other and not rotate relative to each other, thus ensuring the synchronicity of rotation. The spline 9 is fixedly connected to the drive handle 8. The drive handle 8 is slidably connected to the surface of the screw 6. The entire assembly can be locked by moving the drive handle 8.

[0028] In actual use, workers can prepare for operation while on the ground. During the preparation stage, the worker pulls down the drive handle 8. At this time, the drive handle 8 drives the spline 9 to slide vertically downward along the limiting groove 73 in the drive rod 7. At this time, the drive handle 8 disengages from the guide post 12. As the drive handle 8 continues to slide down, the spline 9 can drag the lower clamping plate 4 through the drive rod 7, thereby causing the lower clamping plate 4 to begin to slide downward. At this time, the lower clamping plate 4 applies pressure to the drive plate 41, and the drive plate 41 applies a downward force to the sliding frame 42, thereby forcing the two sliding frames 42 on both sides to move away from each other. The spring 43 is further compressed by sliding downwards. During this process, the fixed plate 44 begins to swing, simultaneously driving the rotating shaft 45 to slide downwards along the trigger groove 14 of the clamp body 1. The trigger plate 47 moves downwards accordingly. During the downward movement, the trigger plate 47 contacts the pull plate 34 and drives it to move downwards synchronously. As the lower clamp plate 4 slides down, the sliding screw 6 also slides down. At this time, the nut 13 located on the surface of the screw 6 begins to slide down along the guide groove 11. When the lower clamp plate 4 moves to the lowest position, the trigger plate 47 has not reached the lowest point. At this time, the two fixed plates 44 are horizontal and in the same straight line. Due to the spring... The elastic force of spring 43 is uniformly horizontal and aligned with the length direction of the fixed plate 44. At this point, the operator can slide the trigger plate 47 downwards while simultaneously releasing the drive handle 8 to cancel the applied force. This allows the limiting ring 46 to slide slightly downwards along the surface of the screw 6. Then, under the elastic force of spring 43, the two fixed plates 44 are quickly compressed, forming an angle with their tips pointing downwards. At this point, the sides of the fixed plates 44 contact the inner wall of the clamp body 1, forming a stable quadrilateral structure. During the slight downward movement of the limiting ring 46, the trigger plate 47 also... The pull plate 34 will move down and press down on the pull plate 34. The pull plate 34 slides down and stretches the spring 32 through the slide plate 33. At this time, the pull plate 34 and the drive plate 41 are in close contact. Then the conductive wire can be connected through the wiring bolt 2. During the entire preparation process, the operator can also choose to pull down the drive handle 8 to make it disengage from the guide post 12, and then manually press down the trigger plates 47 on both sides to the lowest position to quickly complete the preparation work, thereby improving the preparation speed. However, applying force directly to the drive plate 41 requires adding protrusions to the surface of the trigger plate 47 to increase the contact area.

[0029] After preparation, the lower clamping plate 4 and the upper clamping plate 3 are in a stable separated state. The operator can then carry the device and connect it to the corresponding cable. During connection, the operator holds the device and aligns the gap between the upper clamping plate 3 and the lower clamping plate 4 with the cable. When the cable reaches the middle of the upper clamping plate 3, the operator quickly pulls the device, perpendicular to the upper clamping plate 3 and pointing towards the lower clamping plate 4. At this point, the cable contacts and compresses the sliding plate 33 of the upper clamping plate 3, allowing the sliding plate 33 to slide along the sliding groove 31 of the upper clamping plate 3. The extension of the spring 32 decreases, and the sliding plate 33 drives the pull plate 34 to slide upwards synchronously. As the pull plate 34 moves upwards, its end pushes the trigger plate 47 upwards. This thrust pushes the trigger plate 47 upwards along the trigger groove 14. At this time, the two fixed plates 44 begin to swing and gradually become straight. During this process, the sliding frames 42 on both sides slide outwards synchronously, and under the action of the drive plate 41, they gently pull the lower clamping plate 4. Slightly slide down, at which point the lower clamping plate 4 reaches its lowest point and the two fixed plates 44 are in the same straight line. As the pull plate 34 continues to pull, the drive plate 41 begins to continue to slide upward. During this process, the two fixed plates 44 continue to swing and gradually form an angle with their tips pointing towards the cable. When the two fixed plates 44 cancel the flat angle state and form an angle, the pushing force applied to the drive plate 41 by the springs 43 on both sides through the sliding frame 42 can form a resultant force at the rotating shaft 45. This resultant force further increases the upward sliding speed of the drive plate 41. At the same time, as the drive plate 41 slides upward, the angle between the two fixed plates 44 quickly narrows. The two sliding frames 42 slide quickly and gradually approach each other under the action of the springs 43. The mutual sliding of the sliding frames 42 drives the fixed plates 44 to swing, which in turn causes the upper clamping plate 3 to move upward quickly and gradually approach the cable. When the upper clamping plate 3 moves upward, it can drive the top cap 5, the screw 6 and the drive rod 7 to move upward. The screw 6 can drive the nut 13 on its surface to move upward along the guide groove 11.

[0030] When the upper clamping plate 3 is about to contact the cable, the protruding top cap 5 will contact the cable first. At this time, the upper clamping plate 3 continues to move and slides relative to the top cap 5. The spring 3 53 is further compressed. As the top cap 5 slides along the inside of the upper clamping plate 3, it can slide deeper along the surface of the drive rod 7. The connecting post 54 slides down and further into the screw 6. At this time, the limiting rod 51 drives the two locking blocks to gradually insert into the conical groove 71. If the locking plate 52 is aligned with the fixing groove 72 in the conical groove 71 during this process, the locking plate 52 can be directly inserted into the fixing groove 72 and the limiting rod 51 is inserted into the conical groove 71. Then, the lower clamping plate 4, when the screw 6 rotates, can drive the top cap 5 to rotate through the locking plate 52. The connecting column 54 drives the screw 6 to rotate; if the clamping plate 52 is not aligned with the fixing groove 72, the inner wall of the conical groove 71 can squeeze the arc surface of the clamping plate 52, thereby forcing the two arc plates to slide and contract into the limiting rod 51 and compress the spring 4 55, so that the ends of the fixing plate 44 and the limiting rod 51 can be inserted into the conical groove 71. At this time, the upper clamping plate 3 and the lower clamping plate 4 can still maintain the normal clamping of the cable. At this time, the driving rod 7 and the top cap 5 can rotate independently. When the driving rod 7 is rotated by the driving handle 8, the fixing groove 72 rotates accordingly. During the process, when the fixing groove 72 is aligned with the clamping plate 52, the clamping plate 52 pops out instantly under the action of the spring 4 55 and completes the insertion with the fixing groove 72, thus still achieving the working purpose of alignment.

[0031] When the upper clamping plate 3 and the lower clamping plate 4 clamp the cable, the clamping force mainly comes from the combined thrust of the two springs 43 through the drive plate 41. This combined force ensures that the device can clamp the cable, allowing the entire device to be attached to the cable. Then, the operator can manually rotate the drive handle 8. The drive handle 8 drives the drive rod 7 to rotate through the spline 9, which in turn drives the top cap 5 and the screw 6 to rotate. During the rotation of the screw 6, the nut 13 cannot rotate due to its own shape and the restriction of the guide post 12. Then, under the action of the thread, the nut 13 begins to slide downward along the guide groove 11. When the nut 13 contacts the end of the guide groove 11, continue to rotate the drive handle 8 to perform the locking operation. After confirming that it is locked, slide the drive handle 8 up so that its top end is inserted into the bottom end of the guide post 12. Under the action of damping, the drive handle 8 can maintain a stable insertion with the guide post 12. The drive handle 8 and the nut 13 are locked by the guide post 12, and the drive rod 7 is locked by the spline 9 of the drive handle 8. The drive rod 7 can also lock the top cap 5 and the screw 6. At this time, the position of the screw 6 is stable, so that the position of the lower clamp 4 is kept stable. At this time, even if vibration occurs during the operation of the worker, it will not loosen.

[0032] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A reliable grounding clamp, characterized in that: The clamp body (1) is fixedly connected to an upper clamp plate (3) and slidably connected to a lower clamp plate (4). The upper clamp plate (3) is elastically slidably connected to a pull plate (34). The clamp body (1) is slidably connected to a screw (6) and a drive rod (7) that are rotatably connected to the lower clamp plate (4). The end of the drive rod (7) is slidably connected to a drive handle (8) that can be inserted into the clamp body (1). The drive rod (7) is coaxially sleeved inside the screw (6). The top of the screw (6) is slidably connected to a top cap (5). The top cap (5) is elastically slidably connected to the lower clamp plate (4) and protrudes from the upper surface of the lower clamp plate (4). The top cap (5) is elastically provided with a clamping plate (52) that can be inserted into the drive rod (7). The surface of the screw (6) is threadedly connected to a nut (13) that is slidably connected to the clamp body (1). The sliding distance of the nut (13) is equal to the sliding distance of the lower clamp plate (4). The bottom of the inner side of the clamp body (1) is V-shaped. A sliding frame (42) is elastically slidably connected inside the clamp body (1). A drive plate (41) and a fixed plate (44) are hinged to the sliding frame (42). The other end of the drive plate (41) is hinged to the lower clamp plate (4). The other end of the fixed plate (44) is hinged to a rotating shaft (45) that is slidably connected to the clamp body (1). One end of the rotating shaft (45) is fixedly connected to a limiting ring (46) that is slidably connected to the screw (6). The other end is fixedly connected to a trigger plate (47). The sliding distance of the rotating shaft (45) is greater than the sliding distance of the lower clamp plate (4).

2. The reliable grounding clamp according to claim 1, characterized in that: The upper clamp (3) is located at the top of the wire clamp body (1). A groove (31) is provided in the middle of the upper clamp (3). A spring (32) is fixedly connected in the groove (31). A slide plate (33) is fixedly connected to the end of the spring (32) away from the upper clamp (3). Both ends of the slide plate (33) are fixedly connected to the pull plate (34). The slide plate (33) is slidably connected to the groove (31). The pull plate (34) is in the shape of a c. The end of the pull plate (34) away from the slide plate (33) is located directly below the trigger plate (47). The pull plate (34) is slidably connected to the wire clamp body (1).

3. The reliable grounding clamp according to claim 1, characterized in that: The clamp body (1) has a guide groove (11) inside, and a number of evenly arranged guide posts (12) are fixedly connected in the guide groove (11). The lower end of the guide post (12) passes through the clamp body (1) and is inserted into the surface of the drive handle (8). The nut (13) is located in the guide groove (11) and is slidably connected to the guide post (12).

4. The reliable grounding clamp according to claim 1, characterized in that: The side of the clamp body (1) is threaded with a wiring bolt (2), the lower clamp plate (4) is slidably connected to the inner wall of the clamp body (1), the side of the clamp body (1) is provided with a trigger groove (14), the rotating shaft (45) is slidably connected to the trigger groove (14), and the bottom of the trigger groove (14) is lower than the bottom of the inner cavity of the clamp body (1).

5. A reliable grounding clamp according to claim 4, characterized in that: The wire clamp body (1) has two symmetrically arranged sliding frames (42) horizontally slidably connected inside. A second spring (43) is fixedly connected to the side of the sliding frame (42). The end of the second spring (43) away from the sliding frame (42) is fixedly connected to the inner wall of the wire clamp body (1). In the initial state, the second spring (43) is in a compressed state. The outer side and inner side of the sliding frame (42) are respectively hinged to one end of the drive plate (41) and the fixed plate (44).

6. A reliable grounding clamp according to claim 5, characterized in that: The limiting ring (46) is slidably sleeved on the surface of the screw (6). A rotating shaft (45) is fixedly connected to the surface of the limiting ring (46). The rotating shaft (45) passes through the fixing plate (44) and the trigger groove (14) in sequence and is fixedly connected to the trigger plate (47).

7. A reliable grounding clamp according to claim 1, characterized in that: The top cap (5) is slidably connected to the lower clamping plate (4). A limiting rod (51) is fixedly connected inside the top cap (5). A spring four (55) is provided inside the lower end of the limiting rod (51). Two clamping plates (52) are symmetrically arranged. The two ends of the spring four (55) are fixedly connected to the two clamping plates (52) respectively. The end of the clamping plate (52) away from the limiting rod (51) is arc-shaped. The clamping plate (52) is slidably connected to the limiting rod (51). A spring three (53) is sleeved on the surface of the limiting rod (51).

8. A reliable grounding clamp according to claim 7, characterized in that: The lower end of the top cap (5) is fixedly connected to several evenly arranged connecting posts (54). The connecting posts (54) are slidably connected to the screw (6). The inner side of the top cap (5) is slidably sleeved with the surface of the drive rod (7). One end of the spring three (53) is fixedly connected to the top cap (5), and the other end is fixedly connected to the drive rod (7). In the initial state, the spring three (53) is in a compressed state. The top end of the drive rod (7) is provided with a conical groove (71). The conical groove (71) is provided with a fixing groove (72) that matches the two clamping plates (52).

9. A reliable grounding clamp according to claim 8, characterized in that: The drive rod (7) is rotatably connected to the screw (6). A limiting groove (73) is provided at the bottom of the drive rod (7). A spline (9) is slidably connected in the limiting groove (73). The spline (9) is fixedly connected to the drive handle (8). The drive handle (8) is slidably connected to the surface of the screw (6).

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