A low voltage grounding device for a low voltage distribution box

Abstract

The invention discloses a low-voltage grounding device for a low-voltage distribution box, comprising a first clamping head, a second clamping head and other components, wherein the first clamping head and the second clamping head are hinged at the head end of a sliding rod, the sliding rod is connected to a grounding wire, the sliding rod slides in an inner sleeve, a spring is arranged in the inner sleeve, the spring pushes the inner sleeve to move in a direction away from the head end of the sliding rod, and when the inner sleeve slides toward the head end of the sliding rod, the first clamping head and the second clamping head are pushed to approach each other, the sliding rod is provided with a gear, a cam and a non-return rack, the gear is fixedly connected to the cam, the gear is rotatably connected to the sliding rod, one end of the non-return rack is connected to the sliding rod, the non-return rack is elastic, the inner sleeve is provided with a limiting tooth matched with the non-return tooth, the outer sleeve is slidably sleeved outside the inner sleeve, the outer sleeve is provided with a rack extending into the inner sleeve and meshing with the gear, and when the rack pushes the gear to rotate, it can drive the cam to push the non-return rack to fit the limiting tooth. The low-voltage grounding device of the invention is not easy to fall off after connection.

Description

Technical Field

[0001] The invention relates to the technical field of distribution box grounding, and in particular to a low-voltage grounding device for a low-voltage distribution box. Background Art

[0002] Low-voltage distribution boxes are usually not equipped with grounding devices. When inspecting and repairing equipment, workers carry a grounding wire to connect the outgoing busbar or the outgoing terminal wire to the ground. The traditional grounding wire simply sets a wire clamp at the front end of the wire and clamps the outgoing busbar or the outgoing terminal wire with the wire clamp. During the inspection process, when people walk and step on the grounding wire, it is easy to cause the grounding wire to fall off. At the same time, because the grounding wire often needs to extend outside the cabinet door of the distribution box, it is also easy to cause the grounding wire to fall off when the cabinet door is closed. Summary of the invention

[0003] In view of the above-mentioned prior art, the present invention provides a low-voltage grounding device for a low-voltage distribution box, which is not easy to fall off after being connected.

[0004] The technical solution of the present invention is achieved in this way:

[0005] A low-voltage grounding device for a low-voltage distribution box, comprising a first clamping head, a second clamping head, a sliding rod, a spring, an inner sleeve, a gear, a cam, a check rack, a limit tooth, a rack, an outer sleeve and a grounding wire, wherein the first clamping head and the second clamping head are hinged at the head end of the sliding rod, the sliding rod is connected to the grounding wire, the sliding rod slides in the inner sleeve, the spring is arranged in the inner sleeve, the spring pushes the inner sleeve to move in a direction away from the head end of the sliding rod, and when the inner sleeve slides toward the head end of the sliding rod, it pushes the first clamping head and the second clamping head to move in a direction away from the head end of the sliding rod. The clamping heads are close to each other, and the sliding rod is provided with a gear, a cam and a check rack. The gear is fixedly connected to the cam, and the gear is rotatably connected to the sliding rod. One end of the check rack is connected to the sliding rod, and the check rack is elastic. The inner sleeve is provided with a limiting tooth that cooperates with the check tooth. The outer sleeve is slidably sleeved on the outside of the inner sleeve, and the outer sleeve is provided with a rack that extends into the inner sleeve and meshes with the gear. When the rack pushes the gear to rotate, it can drive the cam to push the check rack to fit the limiting tooth.

[0006] Furthermore, the outer side wall of the inner sleeve is provided with a first sliding groove, and the inner side wall of the outer sleeve is provided with a first sliding block, and the first sliding block slides in the first sliding groove.

[0007] Furthermore, a protrusion is provided at the ends of the first clamping head and the second clamping head, and the protrusion is located between the first clamping head and the second clamping head.

[0008] Furthermore, a U-shaped elastic clip is provided between the first clamping head and the second clamping head, the elastic clip is connected to the protrusion, and a side wall of the elastic clip is provided with a wavy anti-slip structure.

[0009] Furthermore, the inner sleeve and the outer sleeve are both made of insulating material.

[0010] Furthermore, an end cover is provided at the end of the inner sleeve, and the grounding wire passes through the end cover.

[0011] Furthermore, second slide grooves are provided on the inner walls on both sides of the head end of the inner sleeve, and the first clamping head and the second clamping head are respectively aligned with one of the second slide grooves, and the first clamping head and the second clamping head slide along the second slide grooves.

[0012] Furthermore, the sliding rod is provided with a cavity, and the gear, cam and check rack are all installed in the cavity.

[0013] Furthermore, the outer side wall of the sliding rod is provided with a third sliding groove, and the rack passes through the third sliding groove to mesh with the gear.

[0014] The beneficial effects of the present invention are:

[0015] When the outer sleeve is pushed by hand during grounding connection, it moves toward the head end. After the outer sleeve slides relative to the inner sleeve, the check rack fits with the limit teeth, and the sliding rod can only move in the direction of inserting into the inner sleeve. The first clamping head and the second clamping head cannot move away from the inner sleeve. The inner sleeves of the first clamping head and the second clamping head are restricted and cannot release the wiring position. When the grounding wire is pulled, the contact between the check rack and the limit teeth cannot be released, and when the grounding wire is pulled by external force, the first clamping head and the second clamping head will not be separated. After the first clamping head and the second clamping head clamp the grounding position, the outer sleeve and the inner sleeve can be stopped from being pushed immediately. At this time, the check rack has been tightly matched with the limit teeth, and the first clamping head and the second clamping head can be fixed at multiple opening angles. When the grounding device needs to be removed after the operation is completed, the staff grabs the outer sleeve and pulls it away from the wiring position. Since the sliding rod and the inner sleeve are restricted, the pulling force at this time will cause the outer sleeve to slide relative to the inner sleeve, thereby driving the gear and the cam to rotate. The raised part of the cam rotates away from the check rack, and the limiting effect between the sliding rod and the inner sleeve is released. A spring is arranged in the inner sleeve, and the spring pushes the inner sleeve to move away from the head end of the sliding rod. Under the action of the spring and the hand pulling, the inner sleeve moves away from the first clamping head and the second clamping head. The first clamping head and the second clamping head gradually lose the limiting effect of the inner sleeve, thereby gradually loosening the wiring position. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only preferred embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0017] Figure 1 It is a structural schematic diagram of a low-voltage grounding device for a low-voltage distribution box of the present invention;

[0018] In the figure, 1 is a first clamping head, 2 is a second clamping head, 3 is a sliding rod, 4 is a spring, 5 is an inner sleeve, 6 is a gear, 7 is a cam, 8 is a check rack, 9 is a limit tooth, 10 is a rack, 11 is an outer sleeve, 12 is a grounding wire, 13 is a first slide groove, 14 is a first slider, 15 is a protrusion, 16 is an elastic clip, 17 is an anti-slip structure, 18 is an end cover, 19 is a second slide groove, 20 is a cavity, and 21 is a third slide groove. DETAILED DESCRIPTION

[0019] In order to better understand the technical content of the present invention, specific embodiments are provided below, and the present invention is further described in conjunction with the accompanying drawings.

[0020] See also Figure 1 A low-voltage grounding device for a low-voltage distribution box comprises a first clamping head 1, a second clamping head 2, a sliding rod 3, a spring 4, an inner sleeve 5, a gear 6, a cam 7, a check rack 8, a limit tooth 9, a rack 10, an outer sleeve 11 and a grounding wire 12. The first clamping head 1 and the second clamping head 2 are hinged at the head end of the sliding rod 3, the sliding rod 3 is connected to the grounding wire 12, the sliding rod 3 slides in the inner sleeve 5, the spring 4 is arranged in the inner sleeve 5, the spring 4 pushes the inner sleeve 5 to move in a direction away from the head end of the sliding rod 3, and the inner sleeve 5 pushes the first clamping head 1 and The second clamping heads 2 are close to each other, and the sliding rod 3 is provided with a gear 6, a cam 7 and a non-return rack 8. The gear 6 is fixedly connected to the cam 7, and the gear 6 is rotatably connected to the sliding rod 3. One end of the non-return rack 8 is connected to the sliding rod 3, and the non-return rack 8 is elastic. The inner sleeve 5 is provided with a limiting tooth 9 that cooperates with the non-return tooth. The outer sleeve 11 is slidably sleeved on the outside of the inner sleeve 5, and the outer sleeve 11 is provided with a rack 10 that extends into the inner sleeve 5 and meshes with the gear 6. When the rack 10 pushes the gear 6 to rotate, it can drive the cam 7 to push the non-return rack 8 to fit the limiting tooth 9.

[0021] When making a ground connection, the staff holds the outer sleeve 11 and aligns the opened first clamping head 1 and the second clamping head 2 with the wiring position. The wiring position generates a force on the sliding rod 3. When the outer sleeve 11 is pushed by hand, it moves toward the head end. The rack 10 meshes with the gear 6 during the movement of the outer sleeve 11, thereby driving the gear 6 to rotate. The gear 6 is fixedly connected to the cam 7, thus driving the cam 7 to rotate until the outer sleeve 11 slides to the limit position. At this time, the raised part of the cam 7 faces the non-return rack 8, and the cam 7 pushes the non-return rack 8 to fit the limit tooth 9. The outer sleeve 11 slides to the limit position relative to the inner sleeve 5. When the outer sleeve 11 is continuously pushed, it will drive the inner sleeve 5 to move toward the head end of the sliding rod 3 and overcome the elastic force of the spring 4. The first clamping head 1 and the second clamping head 2 are hinged at the head end of the sliding rod 3. The width of the first clamping head 1 and the second clamping head 2 when opened is greater than the inner diameter of the inner sleeve 5. When the inner sleeve 5 slides toward the head end of the sliding rod 3, it pushes the first clamping head 1 and the second clamping head 2 to approach each other. The greater the distance that the inner sleeve 5 slides toward the head end of the sliding rod 3, the tighter the first clamping head 1 and the second clamping head 2 are closed, and finally the wiring position is clamped. The first clamping head 1 and the second clamping head 2 are both connected to the sliding rod 3, and the sliding rod 3 is then connected to the grounding wire 12, thereby achieving the grounding of the wiring position. After the outer sleeve 11 slides relative to the inner sleeve 5, the non-return rack 8 fits with the limit tooth 9, and the sliding rod 3 can only move in the direction of inserting into the inner sleeve 5, and the first clamping head 1 and the second clamping head 2 cannot move in the direction away from the inner sleeve 5. The first clamping head 1 and the second clamping head 2 are restricted by the inner sleeve 5 and cannot release the wiring position. When the grounding wire 12 is pulled, the contact between the check tooth and the limit tooth 9 cannot be released, and when the grounding wire 12 is pulled by external force, the first clamping head 1 and the second clamping head 2 will not be separated. After the first clamping head 1 and the second clamping head 2 clamp the grounding position, the outer sleeve 11 and the inner sleeve 5 can be immediately stopped from being pushed. At this time, the check rack 8 has been clamped with the limit tooth 9, and the first clamping head 1 and the second clamping head 2 can be fixed at multiple opening angles. When the grounding device needs to be removed after the operation is completed, the staff grabs the outer sleeve 11 and pulls it away from the wiring position. Since the sliding rod 3 and the inner sleeve 5 are restricted, the pulling force at this time will cause the outer sleeve 11 to slide relative to the inner sleeve 5, thereby driving the gear 6 and the cam 7 to rotate. After the raised part of the cam 7 rotates away from the check rack 8, the limiting effect between the sliding rod 3 and the inner sleeve 5 is released. The spring 4 is arranged in the inner sleeve 5, and the spring 4 pushes the inner sleeve 5 to move in the direction away from the head end of the sliding rod 3. Under the action of the spring 4 and the hand pulling, the inner sleeve 5 moves in the direction away from the first clamping head 1 and the second clamping head 2, and the first clamping head 1 and the second clamping head 2 gradually lose the limiting effect of the inner sleeve 5, thereby gradually loosening the wiring position.In addition to being firmly connected and not easy to fall off, during operation, the present invention can be clamped by holding the outer sleeve 11 and inserting the connecting device into the wiring position, and then the outer sleeve 11 can be pulled up to detach from the wiring position, thereby achieving the beneficial effects of simple and convenient operation and ergonomic design.

[0022] Specifically, the outer wall of the inner sleeve 5 is provided with a first slide groove 13, and the inner wall of the outer sleeve 11 is provided with a first slider 14, and the first slider 14 slides in the first slide groove 13. When the outer sleeve 11 slides relative to the inner sleeve 5, the first slider 14 slides along the first slide groove 13, and the first slider 14 is always in the first slide groove 13 during the sliding process, thereby preventing the outer sleeve 11 and the inner sleeve 5 from being separated from each other, and preventing the outer sleeve 11 and the inner sleeve 5 from rotating relative to each other during the sliding process, ensuring that the rack 10 can accurately mesh with the gear 6 during the sliding process.

[0023] Specifically, the ends of the first clamping head 1 and the second clamping head 2 are provided with a protrusion 15, and the protrusion 15 is located between the first clamping head 1 and the second clamping head 2. When clamping the busbar, the protrusion 15 of the first clamping head 1 and the second clamping head 2 can prevent the busbar from being separated from between the two clamping heads.

[0024] Optionally, a U-shaped elastic clip 16 is provided between the first clamping head 1 and the second clamping head 2, the elastic clip 16 is connected to the protrusion 15, and the side wall of the elastic clip 16 is provided with a wavy anti-slip structure 17. In the process of the first clamping head 1 and the second clamping head 2 clamping the wiring position, the elastic clip 16 first contacts the wiring position, and after clamping, the elastic clip 16 is deformed to clamp the wiring position, and a wavy anti-slip structure 17 is also provided on the side wall of the elastic clip 16 to increase friction and further prevent the grounding device from detaching from the wiring position. The elastic clip 16 also has a tendency to open the first clamping head 1 and the second clamping head 2.

[0025] Specifically, the inner sleeve 5 and the outer sleeve 11 are both made of insulating materials to prevent electric shock accidents.

[0026] Specifically, an end cap 18 is provided at the end of the inner sleeve 5, and the grounding wire 12 passes through the end cap 18. The end cap 18 is provided with a through hole, and the grounding wire 12 passes through the through hole. The end cap 18 covers part of the space of the inner sleeve 5, and can play a protective role.

[0027] Specifically, the inner walls on both sides of the head end of the inner sleeve 5 are provided with second slide grooves 19, the first clamping head 1 and the second clamping head 2 are respectively aligned with one of the second slide grooves 19, and the first clamping head 1 and the second clamping head 2 slide along the second slide grooves 19. The stability of pushing the first clamping head 1 and the second clamping head 2 to approach each other is improved, and the inner sleeve 5 is prevented from rotating relative to the first clamping head 1 and the second clamping head 2.

[0028] Specifically, the sliding rod 3 is provided with a cavity 20, and the gear 6, the cam 7 and the check rack 8 are all installed in the cavity 20. The above components are arranged in the cavity 20, which is convenient for the installation and protection of the above components.

[0029] Specifically, the outer wall of the sliding rod 3 is provided with a third sliding groove 21, and the rack 10 penetrates from the third sliding groove 21 and meshes with the gear 6. The rack 10 slides from the third sliding groove 21 and meshes with the gear 6, and a smaller gear 6 can be provided, thereby avoiding friction between the gear 6 and the inner wall of the inner sleeve 5. At the same time, the outer diameter of the sliding rod 3 can be set to match the inner sleeve 5, thereby improving the sliding stability of the sliding rod 3.

[0030] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A low-voltage grounding device for a low-voltage distribution box, characterized in that: The invention comprises a first clamping head, a second clamping head, a sliding rod, a spring, an inner sleeve, a gear, a cam, a check rack, a limit tooth, a rack, an outer sleeve and a grounding wire, wherein the first clamping head and the second clamping head are hinged at the head end of the sliding rod, the sliding rod is connected to the grounding wire, the sliding rod slides in the inner sleeve, the spring is arranged in the inner sleeve, the spring pushes the inner sleeve to move in a direction away from the head end of the sliding rod, and when the inner sleeve slides toward the head end of the sliding rod, it pushes the first clamping head and the second clamping head to move closer to each other. The sliding rod is provided with a gear, a cam and a check rack, the gear is fixedly connected to the cam, the gear is rotatably connected to the sliding rod, one end of the check rack is connected to the sliding rod, the check rack is elastic, the inner sleeve is provided with the limiting tooth that cooperates with the check tooth, the outer sleeve is slidably sleeved on the outside of the inner sleeve, and the outer sleeve is provided with a rack that extends into the inner sleeve and meshes with the gear. When the rack pushes the gear to rotate, it can drive the cam to push the check rack to fit the limiting tooth.

2. A low-voltage grounding device for a low-voltage distribution box according to claim 1, characterized in that: The outer side wall of the inner sleeve is provided with a first sliding groove, and the inner side wall of the outer sleeve is provided with a first sliding block, and the first sliding block slides in the first sliding groove.

3. A low-voltage grounding device for a low-voltage distribution box according to claim 1, characterized in that: The ends of the first clamping head and the second clamping head are provided with protrusions, and the protrusions are located between the first clamping head and the second clamping head.

4. A low-voltage grounding device for a low-voltage distribution box according to claim 1, characterized in that: A U-shaped elastic clip is provided between the first clamping head and the second clamping head, the elastic clip is connected to the protrusion, and a wavy anti-slip structure is provided on the side wall of the elastic clip.

5. A low-voltage grounding device for a low-voltage distribution box according to claim 1, characterized in that: The inner sleeve and the outer sleeve are both made of insulating material.

6. A low-voltage grounding device for a low-voltage distribution box according to claim 1, characterized in that: An end cap is provided at the end of the inner sleeve, and the grounding wire passes through the end cap.

7. A low-voltage grounding device for a low-voltage distribution box according to claim 1, characterized in that: Second sliding grooves are provided on the inner walls on both sides of the head end of the inner sleeve, and the first clamping head and the second clamping head are respectively aligned with one of the second sliding grooves, and the first clamping head and the second clamping head slide along the second sliding grooves.

8. A low-voltage grounding device for a low-voltage distribution box according to claim 1, characterized in that: The sliding rod is provided with a cavity, and the gear, cam and check rack are all installed in the cavity.

9. A low-voltage grounding device for a low-voltage distribution box according to claim 1, characterized in that: The outer side wall of the sliding rod is provided with a third sliding groove, and the rack passes through the third sliding groove and meshes with the gear.

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