Pole-mounted circuit breaker terminal anti-pulling device

Abstract

The utility model relates to power equipment auxiliary device technical field discloses a kind of anti-pulling device of pole circuit breaker terminal. Including pole circuit breaker body and terminal head, terminal head top is equipped with anti-unhooking mechanism, and pole circuit breaker body bottom is equipped with damping mechanism. Anti-unhooking mechanism is rotated by rotating plate and drives rotating column and gear rotation, drives two sides tooth plate and drives moving plate and clamping block to move to center, and cable is clamped using the arc-shaped recess of clamping block bottom, and rotating plate position is locked by bolt. Damping mechanism is inserted into connecting block air chamber compressed air to generate damping by the moving block below bottom plate, and the connecting rod mechanism, which is composed of fixed plate, rotating ring, connecting rod and connecting rod in sliding slot, is used to maintain the bottom plate level. The utility model realizes the bidirectional firm clamping of cable using gear transmission, prevents falling off;Flexible buffering is realized at the bottom of pole circuit breaker body using pneumatic damping and connecting rod balance, effectively absorbs vibration, and improves the safety and stability of equipment operation.

Description

Technical Field

[0001] This utility model relates to the field of auxiliary devices for power equipment, and in particular to a device for preventing pull-out of terminals of pole-mounted circuit breakers. Background Technology

[0002] Pole-mounted circuit breakers, as crucial protective and control electrical devices in power systems, are widely used in various power distribution networks. During the installation and use of pole-mounted circuit breakers, the quality of the connection between the terminals and external cables directly affects the stability and safety of power transmission. Typically, cables are fixed to the pole-mounted circuit breaker body via bolts through terminals to achieve circuit continuity.

[0003] However, in practical applications, the cables connecting pole-mounted circuit breakers are often thick and heavy, or susceptible to unpredictable external pulling forces during wiring. Existing terminal structures typically lack additional auxiliary fixing devices, and the friction of the terminal bolts alone is insufficient to withstand the cable's pulling force for extended periods. Once the cable is subjected to significant external pulling, it can easily loosen or even detach from the terminal, leading not only to circuit breaks but also serious safety accidents such as arcing and short circuits.

[0004] Furthermore, pole-mounted circuit breakers are installed in complex environments, frequently subjected to vibrations from switchgear operation or external environmental shocks. Existing pole-mounted circuit breaker mounting bases mostly employ rigid connections, lacking effective buffering and vibration damping mechanisms. Prolonged vibration not only easily damages the precision components inside the pole-mounted circuit breaker but also exacerbates mechanical fatigue at the wiring terminals, leading to loose connections. This lack of connection reliability due to the absence of anti-detachment protection and vibration damping is a pressing challenge that needs to be addressed in current technology.

[0005] Therefore, this utility model proposes an anti-pull-out device for the terminal of a pole-mounted circuit breaker to address the shortcomings of the prior art. Utility Model Content

[0006] In view of the problems existing in the pole-mounted circuit breaker terminal anti-pull-out device, such as poor cable connection stability, easy detachment due to external pulling, and lack of buffer and shock absorption mechanism in the pole-mounted circuit breaker mounting base, which is susceptible to environmental vibration and thus equipment damage or loosening of wiring, this utility model aims to provide a pole-mounted circuit breaker terminal anti-pull-out device with improved structure that can effectively solve the above problems.

[0007] This utility model provides a pole-mounted circuit breaker terminal anti-pull-out device, comprising: a pole-mounted circuit breaker body, and a terminal fixedly connected to the top of the pole-mounted circuit breaker body; a shock-absorbing mechanism disposed at the bottom of the pole-mounted circuit breaker body, and an anti-pull-out mechanism disposed at the top of the terminal.

[0008] The anti-detachment mechanism has a structure that achieves bidirectional clamping through gear and rack transmission. Specifically, it includes a fixed block 1 fixedly connected to the top of the terminal head, a rotating plate for manual operation rotatably connected to the top of the fixed block 1, a rotating block fixedly connected to one end of the rotating plate, a rotating column extending into the interior of the fixed block 1 fixedly connected to the bottom of the rotating block, and a gear fixedly connected to the bottom end of the rotating column.

[0009] Furthermore, both sides of the gear are meshed with toothed plates, and each of the two toothed plates is fixedly connected to a movable plate on the side away from the gear. A connecting column is fixedly connected to the bottom of the movable plate, and a clamping block for direct contact with the cable is fixedly connected to the bottom end of the connecting column. The clamping block is slidably connected to the inside of the fixed block. The shock absorption mechanism includes a base, and a base plate is slidably connected to the inner side of the base. The top of the base plate is fixedly connected to the bottom of the pole-mounted circuit breaker body. The vertical floating of the pole-mounted circuit breaker body is achieved by the sliding cooperation of the base plate within the base.

[0010] Preferably, the shock absorption mechanism further includes a movable block fixedly connected to the bottom of the base plate and a connecting block fixedly connected to the inner bottom wall of the base. The connecting block has an air chamber with a receiving space inside. The movable block is slidably connected to the inside of the air chamber and is sealed to the inner wall of the air chamber to absorb shock using air compression damping.

[0011] Preferably, a fixing plate is fixedly connected to both sides of the bottom of the base plate, a rotating ring is rotatably connected to the side of the fixing plate, and a connecting rod is fixedly connected to the outer wall of the rotating ring, which is used to construct the basic structure of the connecting rod balance system.

[0012] Preferably, the connecting rod is rotatably connected to the end of the connecting rod away from the rotating ring, and two symmetrically distributed fixing blocks are fixedly connected to the inner side wall of the base. The fixing blocks are provided with a sliding groove, and the connecting rod is slidably connected to the inside of the sliding groove. The sliding groove restricts the movement trajectory of the connecting rod, thereby keeping the base plate level.

[0013] Preferably, a threaded hole is provided on one side of the top of the fixing block, and a bolt is threaded inside the threaded hole. The bottom end of the bolt abuts against the top surface of the rotating plate. The friction generated by tightening the bolt locks the position of the rotating plate and prevents it from loosening.

[0014] Preferably, the fixing block has a through hole for the cable to pass through, the clamping block is located above the through hole, and the bottom surface of the clamping block has an arc-shaped groove to increase the contact area with the cable surface and prevent damage to the cable.

[0015] Preferably, a guide groove is provided on the top of the inner wall of the fixed block, the movable plate is slidably embedded in the guide groove, and the movable plate reciprocates along the length of the guide groove to ensure the smoothness and straightness of the rack and pinion transmission.

[0016] Preferably, the outer wall of the rotating column is rotatably connected to the fixed block by a bearing, and the gear is located above the moving plate to reduce rotational friction and optimize the internal space layout.

[0017] This utility model has the following beneficial effects:

[0018] 1. This utility model solves the problem in the prior art where the lack of an effective physical locking structure at the terminal block makes the cable easy to fall off due to external pulling by the cable. It achieves the technical effect of quickly and firmly clamping and fixing the cable in both directions, preventing the cable from loosening and falling off, and improving the safety and reliability of electrical connection.

[0019] 2. This utility model solves the problem that existing pole-mounted circuit breakers lack buffer protection due to direct rigid installation and are susceptible to damage to internal components or loose wiring caused by external vibrations by setting a shock-absorbing mechanism at the bottom of the pole-mounted circuit breaker body. It utilizes the movable block under the base plate to insert into the air chamber inside the connecting block and compress air. It achieves the technical effect of effectively absorbing and dissipating vibration energy by using pneumatic damping generated by air compression, and providing flexible support and buffer protection for the pole-mounted circuit breaker body.

[0020] 3. This utility model solves the problem of lateral tilting or swaying of the pole-mounted circuit breaker body during vertical shock absorption and floating by setting up a connecting rod balance assembly consisting of a fixed plate, a rotating ring, a connecting rod and a connecting rod, and by using the sliding groove inside the fixed block two to limit the movement trajectory of the connecting rod. It achieves the technical effect of limiting the base plate to move only in the vertical direction and ensuring that the pole-mounted circuit breaker body always maintains horizontal stability during shock absorption.

[0021] 4. This utility model solves the problem of the gear and rack transmission mechanism reversing under long-term vibration, which leads to a decrease in clamping force, by setting a bolt on the top of the fixed block to abut against the rotating plate and using the friction force generated by tightening the bolt to lock the rotating plate. This achieves the technical effect of preventing the anti-loosening mechanism from loosening unexpectedly and further ensuring the durability of cable fixation. Attached Figure Description

[0022] Figure 1 This is a three-dimensional schematic diagram of the anti-pull-out device for the terminal of the pole-mounted circuit breaker proposed in this utility model.

[0023] Figure 2 This is a schematic diagram of the moving block of the anti-pull-out device for the terminal block of the pole-mounted circuit breaker proposed in this utility model.

[0024] Figure 3 This is a schematic diagram of the fixing plate of the anti-pull-out device for the terminal of the pole-mounted circuit breaker proposed in this utility model;

[0025] Figure 4 for Figure 2 Enlarged view of point A in the middle.

[0026] Legend:

[0027] 1. Pole-mounted circuit breaker body; 2. Wiring terminals;

[0028] 3. Anti-detachment mechanism; 31. Fixing block one;

[0029] 32. Rotating plate; 33. Rotating block; 34. Rotating column; 35. Gear; 36. Tooth plate; 37. Moving plate; 38. Connecting column; 39. Clamping block; 310. Bolt;

[0030] 4. Shock absorption mechanism; 41. Base; 42. Base plate; 43. Fixing plate; 44. Rotating ring; 45. Connecting rod; 46. Connecting rod; 47. Connecting block; 48. Fixing block two; 49. Moving block. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0032] Example:

[0033] Reference Figures 1 to 4 This utility model provides a pole-mounted circuit breaker terminal anti-pull-out device, which aims to solve the problems in the prior art where the terminal lacks an effective cable locking structure, causing the cable to easily fall off due to tension, and the pole-mounted circuit breaker body lacks a buffer mechanism at the bottom, causing vibration to damage the equipment.

[0034] like Figure 1 and Figure 2As shown, the anti-pull-out device for the pole-mounted circuit breaker terminal includes a pole-mounted circuit breaker body 1 and a terminal 2 fixedly connected to the top of the pole-mounted circuit breaker body 1. The bottom of the pole-mounted circuit breaker body 1 is provided with a shock-absorbing mechanism 4 for buffering external impact forces, and the top of the terminal 2 is provided with an anti-pull-out mechanism 3 for clamping and locking the cable. The pole-mounted circuit breaker body 1 is the core electrical component of the overall device, the terminal 2 is used to realize the electrical connection between the pole-mounted circuit breaker body 1 and the external cable, the anti-pull-out mechanism 3 realizes the physical fixation of the cable through mechanical transmission, and the shock-absorbing mechanism 4 protects the pole-mounted circuit breaker body 1 from vibration through the balance principle of pneumatic damping and connecting rod 45.

[0035] Specifically, the anti-detachment mechanism 3 includes a fixing block 31 as a mounting base. The fixing block 31 is fixedly connected to the top of the terminal 2. A through hole for the cable to pass through is opened inside the fixing block 31. In order to achieve the clamping operation of the cable, a rotating plate 32 is rotatably connected to the top of the fixing block 31. The rotating plate 32 is a force-applying component for manual operation. A rotating block 33 is fixedly connected to one end of the rotating plate 32. A rotating column 34 is fixedly connected to the bottom of the rotating block 33. The rotating column 34 passes through the top wall of the fixing block 31 and extends into the interior of the fixing block 31. In order to ensure the smoothness of rotation, the outer wall of the rotating column 34 is rotatably connected to the fixing block 31 through a bearing.

[0036] like Figure 2 and Figure 4 As shown, in order to convert the rotational motion into linear clamping motion, a gear 35 is fixedly connected to the bottom end of the rotating column 34. The gear 35 is located at the top of the inner part of the fixed block 31. Toothed plates 36 are meshed on both sides of the gear 35. The rotation of the gear 35 can drive the toothed plates 36 on both sides to move towards the center or separate to the sides at the same time. A movable plate 37 is fixedly connected to the side of each toothed plate 36 away from the gear 35. In order to limit and guide the moving parts, a guide groove is opened on the top of the inner wall of the fixed block 31, and the movable plate 37 is slidably embedded in the guide groove. The movable plate 37 reciprocates along the length of the guide groove. A connecting post 38 is fixedly connected to the bottom of the movable plate 37. A clamping block 39 is fixedly connected to the bottom end of the connecting post 38. The clamping block 39 is slidably connected to the inside of the fixed block 31 and is located above the through hole. In order to increase the contact area with the cable and prevent damage to the cable, an arc-shaped groove is provided on the bottom surface of the clamping block 39. When the gear 35 rotates, the two clamping blocks 39 are driven to move inward and press against the outer surface of the cable through the transmission of the toothed plate 36, the movable plate 37 and the connecting post 38.

[0037] In addition, to prevent the clamping state from loosening, a threaded hole is provided on one side of the top of the fixing block 31. A bolt 310 is connected to the threaded hole. The bottom end of the bolt 310 abuts against the top surface of the rotating plate 32. By tightening the bolt 310, the position of the rotating plate 32 is locked by friction, thereby maintaining the clamping force of the clamping block 39 on the cable.

[0038] Reference Figure 3 The shock absorption mechanism 4 has a base 41 as a supporting foundation. A base plate 42 is slidably connected to the inner side of the base 41. The top of the base plate 42 is fixedly connected to the bottom of the pole-mounted circuit breaker body 1, so that the pole-mounted circuit breaker body 1 can float vertically relative to the base 41 with the base plate 42. In order to absorb and dissipate vibration energy, a moving block 49 is fixedly connected to the bottom of the base plate 42. At the same time, a connecting block 47 is fixedly connected to the inner bottom wall of the base 41. The connecting block 47 has an air chamber with a accommodating space. The moving block 49 is slidably connected to the inside of the air chamber and is sealed to the inner wall of the air chamber. In the assembled state, when the base plate 42 is subjected to a downward impact force, it drives the moving block 49 to insert into the air chamber and compress the air inside. The reaction force generated by the air being compressed forms a pneumatic damping effect, thereby effectively buffering the impact of external vibration on the pole-mounted circuit breaker body 1.

[0039] To ensure the horizontal stability of the base plate 42 during vertical shock absorption and prevent the pole-mounted circuit breaker body 1 from tilting, fixed plates 43 are fixedly connected to both sides of the bottom of the base plate 42. A rotating ring 44 is rotatably connected to the side of the fixed plate 43. A connecting rod 45 is fixedly connected to the outer wall of the rotating ring 44. A connecting rod 46 is rotatably connected to the end of the connecting rod 45 away from the rotating ring 44. At the same time, two symmetrically distributed fixed blocks 48 are fixedly connected to the inner side wall of the base 41. The interior of the fixed blocks 48 is provided with a groove for limiting the movement trajectory. The connecting rod 46 is slidably connected to the interior of the groove. This multi-link 45 combined with the guide structure of the groove ensures that the connecting rod 46 can only slide horizontally within the fixed blocks 48. Thus, the connecting rod 45 restricts the base plate 42 to only move vertically, greatly improving the attitude stability of the pole-mounted circuit breaker body 1 during shock absorption.

[0040] As a preferred embodiment, in order to enhance the airtightness and damping effect of the shock absorption mechanism 4, the fit between the movable block 49 fixedly connected to the bottom of the base plate 42 and the air chamber opened inside the connecting block 47 is further optimized. Specifically, the outer peripheral surface of the movable block 49 and the inner wall surface of the air chamber adopt a high-precision clearance fit, and a sealing ring groove and an O-ring (not shown in the figure) can be provided on the outer wall of the movable block 49, so as to ensure that the movable block 49 can effectively compress air when sliding in the air chamber and form a stable air cushion effect.

[0041] As another preferred embodiment, in order to improve the ease of operation and compactness of the anti-detachment mechanism 3, the rotating column 34 is designed to penetrate the top wall of the fixed block 31 and extend into its interior. A bearing is provided at the connection between the rotating column 34 and the fixed block 31. The bearing can reduce the frictional resistance during rotation, making it easier and smoother for the operator to rotate the rotating plate 32. At the same time, the gear 35 is located above the moving plate 37. This layered spatial layout can effectively utilize the limited space inside the fixed block 31, making the overall structure more compact.

[0042] As a further preferred embodiment, in order to ensure that the clamping block 39 fixes the cable more firmly and does not damage the cable insulation layer, the inner wall of the arc-shaped groove on the bottom surface of the clamping block 39 may be provided with anti-slip texture or a rubber pad layer (not shown in the figure). The radius of curvature of the arc-shaped groove is adapted to the outer diameter of commonly used cables, so that it can fit the cable surface to the greatest extent during clamping, disperse the clamping pressure, and prevent the cable from deforming or slipping.

[0043] In addition, to facilitate the cable passing through and subsequent clamping operations, the through hole inside the fixing block 31 is a circular or rectangular through hole, the size of which is slightly larger than the maximum outer diameter of the cable to be connected. The clamping block 39 is located above the through hole. In the initial state, the clamping block 39 is retracted into the groove on the inner wall of the fixing block 31, without obstructing the cable from passing through. After the cable is installed in place, the clamping block 39 is driven to extend and clamp the cable through the gear 35 transmission mechanism.

[0044] For the guiding structure of the movable plate 37, the guide groove opened on the top of the inner wall of the fixed block 31 is a dovetail groove or a T-shaped groove structure. The top of the movable plate 37 is provided with a corresponding dovetail block or T-shaped slider, thereby restricting the movable plate 37 to slide in a straight line within the guide groove, preventing the movable plate 37 from falling off or deflecting when subjected to force, and ensuring that the toothed plate 36 and the gear 35 always maintain a good meshing state.

[0045] The working principle is as follows:

[0046] During cable connection and fixing, the cable is first passed through the through hole inside the fixing block 31 and connected to the terminal 2 of the pole-mounted circuit breaker body 1. Then, the operator manually rotates the rotating plate 32 at the top, causing the rotating block 33 fixed at one end and the rotating column 34 below to rotate synchronously. The rotation of the rotating column 34 drives the gear 35 at the bottom to rotate. Since the gear 35 meshes with the toothed plates 36 on both sides, the rotational motion of the gear 35 is converted into linear motion of the two toothed plates 36 in opposite directions, driving the two toothed plates 36 to move closer or further apart.

[0047] When the toothed plate 36 moves towards the center, it drives the movable plate 37, which is fixedly connected to it, to slide in the guide groove at the top of the fixed block 31. This, in turn, drives the clamping block 39 at the bottom to retract towards the center via the connecting column 38. The two clamping blocks 39 gradually approach the cable until the arc-shaped groove on the bottom surface of the clamping block 39 tightly abuts against the outer surface of the cable, thus achieving a firm clamping of the cable and effectively preventing the cable from falling off due to external pulling. After clamping, tighten the bolt 310 so that its bottom end abuts against the surface of the rotating plate 32, using friction to lock the rotating plate 32 and prevent the mechanism from loosening. If it is necessary to remove the cable, simply loosen the bolt 310 in the opposite direction and reverse the rotating plate 32 to open the clamping blocks 39 to both sides.

[0048] During the shock absorption process, when the pole-mounted circuit breaker body 1 is subjected to external vibration or impact, the pole-mounted circuit breaker body 1 pushes the base plate 42 to move downward inside the base 41. The downward movement of the base plate 42 causes the moving block 49 at its bottom to insert into the air chamber inside the connecting block 47, compressing the air inside the air chamber. The resistance generated when the air is compressed consumes the vibration energy, forming a pneumatic damping effect, thereby reducing the impact of vibration on the pole-mounted circuit breaker body 1.

[0049] Simultaneously, the downward movement of the base plate 42 causes the fixed plate 43 and rotating ring 44 to move downwards, which in turn drives the connecting rod 45 to rotate. The connecting rod 45 then drives the connecting rod 46 to slide horizontally within the groove inside the fixed block 48. This multi-link mechanism restricts the degree of freedom of the base plate 42, forcing it to remain horizontal and float up and down, effectively preventing the pole-mounted circuit breaker body 1 from tilting or overturning during vibration, thus ensuring the operational stability of the equipment. When the external vibration weakens or disappears, the moving block 49 and base plate 42 are pushed upwards to reset by the reaction force of compressed air.

Claims

1. Anti-pull-out device for pole-mounted circuit breaker terminals, including: The pole-mounted circuit breaker body (1) and the terminal block (2) fixedly connected to the top of the pole-mounted circuit breaker body (1) are provided with a shock-absorbing mechanism (4) at the bottom of the pole-mounted circuit breaker body (1) and an anti-detachment mechanism (3) at the top of the terminal block (2). The anti-detachment mechanism (3) is characterized in that it includes a fixed block (31) fixedly connected to the top of the terminal (2), a rotating plate (32) rotatably connected to the top of the fixed block (31), a rotating block (33) fixedly connected to one end of the rotating plate (32), a rotating column (34) fixedly connected to the bottom of the rotating block (33), the rotating column (34) penetrating the top wall of the fixed block (31) and extending into its interior, a gear (35) fixedly connected to the bottom end of the rotating column (34), toothed plates (36) meshing with both sides of the gear (35), a movable plate (37) fixedly connected to the side of the two toothed plates (36) away from the gear (35), a connecting column (38) fixedly connected to the bottom of the movable plate (37), a clamping block (39) fixedly connected to the bottom end of the connecting column (38), and the clamping block (39) slidably connected to the interior of the fixed block (31). The shock absorption mechanism (4) includes a base (41), and a bottom plate (42) is slidably connected to the inner side of the base (41). The top of the bottom plate (42) is fixedly connected to the bottom of the pole-mounted circuit breaker body (1).

2. The anti-pull-out device for the terminal of a pole-mounted circuit breaker according to claim 1, characterized in that, The shock absorption mechanism (4) further includes a movable block (49) fixedly connected to the bottom of the base plate (42) and a connecting block (47) fixedly connected to the inner bottom wall of the base (41). The connecting block (47) has an air chamber inside, and the movable block (49) is slidably connected to the inside of the air chamber and sealed to the inner wall of the air chamber.

3. The anti-pull-out device for the terminal of the pole-mounted circuit breaker according to claim 1, characterized in that, The bottom of the base plate (42) is fixedly connected to both sides of the base plate (43). A rotating ring (44) is rotatably connected to the side of the fixed plate (43). A connecting rod (45) is fixedly connected to the outer wall of the rotating ring (44). A connecting rod (46) is rotatably connected to the end of the connecting rod (45) away from the rotating ring (44).

4. The anti-pull-out device for the terminal of the pole-mounted circuit breaker according to claim 3, characterized in that, The inner wall of the base (41) is fixedly connected to two symmetrically distributed fixing blocks (48). The fixing blocks (48) have a sliding groove inside, and the connecting rod (46) is slidably connected to the inside of the sliding groove.

5. The anti-pull-out device for the terminal of a pole-mounted circuit breaker according to claim 1, characterized in that, The top side of the fixing block (31) is provided with a threaded hole, and a bolt (310) is threaded inside the threaded hole. The bottom end of the bolt (310) abuts against the top surface of the rotating plate (32).

6. The anti-pull-out device for the terminal of a pole-mounted circuit breaker according to claim 1, characterized in that, The fixing block (31) has a through hole for the cable to pass through, the clamping block (39) is located above the through hole, and the bottom surface of the clamping block (39) has an arc-shaped groove.

7. The anti-pull-out device for the terminal of a pole-mounted circuit breaker according to claim 1, characterized in that, The top of the inner wall of the fixed block (31) is provided with a guide groove, the movable plate (37) is slidably embedded in the inside of the guide groove, and the movable plate (37) reciprocates along the length direction of the guide groove.

8. The anti-pull-out device for the terminal of a pole-mounted circuit breaker according to claim 1, characterized in that, The outer wall of the rotating column (34) is rotatably connected to the fixed block (31) via a bearing, and the gear (35) is located above the moving plate (37).

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