A circuit breaker truck

Abstract

This utility model provides a circuit breaker trolley, including a support frame, a secondary propulsion mechanism, an elastic buffer assembly, and a correction and positioning assembly. The secondary propulsion mechanism also includes a main guide member mounted on the support frame, a propulsion seat slidably mounted on the main guide member, a secondary guide member mounted on the propulsion seat, and a circuit breaker mounting seat slidably mounted on the secondary guide member. The elastic member abuts against the propulsion seat and the circuit breaker mounting seat at both ends. A positioning member is mounted on the support frame and has a wedge-shaped groove, while a guide post is mounted on the circuit breaker mounting seat. When the propulsion seat moves, it pushes the elastic member, which in turn pushes the circuit breaker mounting seat to move. The guide post slides into the wedge-shaped groove and is compressed, causing the circuit breaker mounting seat to slide along the secondary guide member and compress the elastic member. This utility model has advantages such as smooth propulsion, automatic correction and positioning, buffering and anti-collision, labor-saving operation, and safety and reliability, and is particularly suitable for the import and export of circuit breaker trolleys in high-voltage switchgear.

Description

Technical Field

[0001] This utility model relates to the field of circuit breakers, and in particular to a circuit breaker trolley. Background Technology

[0002] The circuit breaker trolley is a core movable component in high-voltage switchgear, responsible for the crucial task of accurately transporting the circuit breaker body from the test position to the working position and achieving reliable electrical connection with the stationary contacts inside the cabinet. Its propulsion and positioning accuracy and operational stability directly affect the switching reliability and operational safety of the switchgear. In power systems and industrial power distribution, trolley-type circuit breakers require frequent pushing and pulling operations, placing high demands on the trolley's guiding mechanism, positioning mechanism, and buffer protection devices for high precision, low impact, and ease of operation.

[0003] Traditional circuit breaker trolley propulsion mechanisms generally suffer from insufficient positioning accuracy and significant operational impact. During propulsion, the alignment of the trolley and cabinet contacts relies on repeated manual adjustments, lacking an effective automatic correction structure. This makes them prone to contact misalignment due to manufacturing or assembly errors. Furthermore, rigid stop mechanisms are often used when the trolley reaches its final position, lacking cushioning, leading to hard collisions between the trolley and cabinet that may damage contacts or insulation components. In addition, traditional trolley guiding mechanisms typically only support movement in one direction, and the lateral position cannot be adaptively adjusted during propulsion, resulting in significant operational resistance and difficulty in alignment. The lack of intuitive feedback on the sewage discharge or maintenance status of some trolleys increases the risk of misoperation. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a circuit breaker trolley in view of the above-mentioned defects in the prior art.

[0005] In order to overcome the above-mentioned defects of the prior art, the embodiments of this utility model provide a circuit breaker trolley to solve the problems mentioned in the background art.

[0006] To solve the above-mentioned technical problems, this utility model adopts the following technical solution: A circuit breaker trolley, including a support frame, is characterized in that it further includes: The secondary propulsion mechanism includes a main guide member disposed on the support frame, a propulsion seat slidably disposed on the main guide member, a secondary guide member disposed on the propulsion seat, and a circuit breaker mounting seat slidably disposed on the secondary guide member; The resilient buffer assembly includes a resilient element that abuts against the push seat and the circuit breaker mounting seat; The alignment and positioning assembly includes a positioning member disposed on the support frame and having a wedge-shaped groove, and a guide column disposed on the circuit breaker mounting base; When the propulsion seat moves along the main guide member, the elastic member pushes the circuit breaker mounting seat to move synchronously; the guide post then slides into the wedge groove and is squeezed by the groove wall of the wedge groove, causing the circuit breaker mounting seat to slide along the secondary guide member and compress the elastic member.

[0007] Preferably, the auxiliary guide includes an assembly base and a floating guide shaft, the assembly base being disposed on the propulsion base, and the floating guide shaft being disposed on the assembly base; the circuit breaker mounting base is provided with a sliding sleeve, the sliding sleeve being sleeved on the outside of the floating guide shaft and slidingly engaging with the floating guide shaft.

[0008] Preferably, the elastic buffer assembly further includes a first limiting washer and a second limiting washer, the first limiting washer being disposed on the mounting base and the second limiting washer being disposed on the sliding sleeve; the elastic element is sleeved on the outside of the floating guide shaft, and the two ends of the elastic element abut against the first limiting washer and the second limiting washer respectively.

[0009] Preferably, the end of the floating guide shaft away from the mounting base is provided with a stop ring and a flexible anti-collision pad. The stop ring is disposed at the end of the floating guide shaft, and the flexible anti-collision pad is disposed on the side of the stop ring facing the sliding sleeve. The sliding sleeve abuts against the flexible anti-collision pad.

[0010] Preferably, the alignment and positioning assembly further includes a rolling wheel and a through pin. The rolling wheel is disposed outside the guide post through the through pin, and the rolling wheel can enter and abut against the wedge groove.

[0011] Preferably, the wedge-shaped groove includes a flared guide section and a straight positioning section, wherein the flared guide section is connected to the straight positioning section.

[0012] Preferably, it further includes a drive mechanism, which includes a lead screw and a drive nut. The lead screw is disposed inside the support frame, and the drive nut is disposed on the push seat and threadedly engaged with the lead screw.

[0013] Preferably, the drive mechanism further includes a bearing housing and a bearing, the bearing housing being disposed on the support frame, and the lead screw passing through the interior of the bearing housing and the bearing.

[0014] Preferably, the main guiding component includes a guide rail and a limiting block, the bottom end of the push seat is provided with a slider, the slider is slidably disposed outside the guide rail, and the limiting block can limit the sliding of the slider.

[0015] Preferably, the support frame includes a base plate, side plates, casters, and brake components. The side plates are disposed on both sides of the base plate, and the casters and brake components are disposed at the bottom end of the base plate.

[0016] The present invention adopts the above technical solution and has the following technical effects compared with the prior art: 1. The push seat pushes the circuit breaker mounting base through the elastic element. When the circuit breaker mounting base is subjected to the corrective force, it can further compress the elastic element to absorb the impact energy and prevent the contacts from colliding hard.

[0017] 2. When the guide column slides into the wedge groove, the flared guide section applies a lateral compressive force to force the circuit breaker mounting base to automatically center itself. After entering the straight positioning section, it locks its position to ensure accurate contact docking.

[0018] 3. The rolling contact between the roller and the wedge groove reduces friction and makes propulsion easier; the stop ring, together with the flexible anti-collision pad and the limit block, provides multiple limits to prevent overtravel and improve safety. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the support frame and secondary propulsion mechanism of a circuit breaker trolley according to the present invention; Figure 2 This is a schematic diagram of the support frame, guide rail and limiting block of a circuit breaker trolley according to the present invention; Figure 3 This is a schematic diagram of the drive mechanism of a circuit breaker trolley according to the present invention; Figure 4 This is a schematic diagram of the secondary propulsion mechanism of a circuit breaker trolley according to the present invention; Figure 5 This is a schematic diagram of a circuit breaker mounting base, elastic buffer assembly, and rolling wheel of a circuit breaker trolley according to the present invention; Figure 6 This is a schematic diagram of a correction and positioning component for a circuit breaker trolley according to the present invention; Figure 7 This is a schematic diagram of the slider and drive nut of a circuit breaker trolley according to the present invention; Figure 8 This is a schematic diagram of the universal wheel and brake components of a circuit breaker trolley according to the present invention.

[0020] The attached figures are labeled as follows: 1. Support frame; 101. Base plate; 102. Side plate; 103. Caster wheel; 104. Brake component; 2. Secondary propulsion mechanism; 201. Main guide component; 202. Propulsion seat; 203. Secondary guide component; 204. Circuit breaker mounting seat; 205. Assembly seat; 206. Floating guide shaft; 207. Sliding sleeve; 208. Stop ring; 209. Flexible anti-collision pad; 210. Guide rail; 211. Limiting block; 2 12. Slider; 3. Elastic buffer assembly; 301. Elastic element; 302. First limiting washer; 303. Second limiting washer; 4. Correction and positioning assembly; 401. Positioning element; 402. Guide post; 403. Wedge groove; 404. Roller; 405. Through pin; 406. Flared guide section; 407. Straight positioning section; 5. Drive mechanism; 501. Lead screw; 502. Drive nut; 503. Bearing seat; 504. Bearing. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0022] Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0023] Example 1:

[0024] As attached Figures 1 to 8 The circuit breaker trolley shown has a base plate 101 of a support frame 1 placed horizontally, with side plates 102 vertically fixed to both sides of the base plate 101. Casters 103 are installed at the four corners of the bottom of the base plate 101. The wheel frames of the casters 103 can rotate around a vertical axis, and the wheels are in contact with the ground. A brake 104 is located to the side of the casters 103. When the brake 104 swings downwards, it presses against the wheel surface of the casters 103, preventing the wheels from rolling, and the base plate 101 comes to a stop.

[0025] In the secondary propulsion mechanism 2, the guide rail 210 of the main guide component 201 is fixed to the upper surface of the base plate 101. The slider 212 at the bottom of the propulsion seat 202 slides outside the guide rail 210. Limit blocks 211 are fixed at both ends of the guide rail 210. The propulsion seat 202 stops when the slider 212 contacts the limit block 211. The mounting base 205 of the auxiliary guide component 203 is fixed to the upper surface of the propulsion seat 202. One end of the floating guide shaft 206 is fixed to the mounting base 205, and the axis of the floating guide shaft 206 is perpendicular to the direction of the guide rail 210. A sliding sleeve 207 is fixed to the bottom of the circuit breaker mounting base 204. The sliding sleeve 207 is fitted outside the floating guide shaft 206 and slides. A stop ring 208 is provided at the end of the floating guide shaft 206. A flexible anti-collision pad 209 is fixed to the side of the stop ring 208 facing the sliding sleeve 207. When the sliding sleeve 207 slides to the end, it first contacts the flexible anti-collision pad 209 and is then limited by the stop ring 208.

[0026] In the elastic buffer assembly 3, the elastic element 301 is sleeved outside the floating guide shaft 206. The first limiting washer 302 is fixed to the mounting base 205, and the second limiting washer 303 is fixed to the sliding sleeve 207. The two ends of the elastic element 301 abut against the first limiting washer 302 and the second limiting washer 303, respectively. When the push seat 202 moves forward, the mounting base 205 pushes the elastic element 301 through the first limiting washer 302. The elastic element 301 pushes the sliding sleeve 207 and the circuit breaker mounting base 204 forward synchronously through the second limiting washer 303, and the elastic element 301 maintains its initial compression. When the circuit breaker mounting base 204 is subjected to lateral compressive force, the sliding sleeve 207 drives the second limiting washer 303 to compress the elastic element 301, the coil spacing of the elastic element 301 decreases, and the reaction force increases. After the compressive force disappears, the elastic element 301 pushes the second limiting washer 303 and the sliding sleeve 207 to reset.

[0027] In the alignment and positioning assembly 4, the positioning element 401 is fixed to the inner wall of the base plate 101. The positioning element 401 has a wedge-shaped groove 403, which includes a flared guide section 406 and a straight positioning section 407. The flared guide section 406 is located at the entrance and the groove wall is open in a V-shape. The straight positioning section 407 is located at the depth and the groove wall is parallel. The two are connected. The guide post 402 is fixed to the circuit breaker mounting base 204. The rolling wheel 404 is rotatably mounted on the end of the guide post 402 through the through pin 405. When the circuit breaker mounting base 204 moves forward, the guide post 402 drives the rolling wheel 404 into the flared guide section 406. The inclined groove wall pushes the rolling wheel 404. The rolling wheel 404 applies a lateral compressive force to the circuit breaker mounting base 204 through the through pin 405 and the guide post 402, forcing the circuit breaker mounting base 204 to slide along the floating guide shaft 206 towards the mounting base 205 and compress the elastic element 301. Roller 404 continues to roll into straight positioning section 407, parallel groove wall clamps roller 404, locking the lateral position of circuit breaker mounting base 204.

[0028] In drive mechanism 5, lead screw 501 is horizontally mounted on the upper surface of base plate 101, bearing housing 503 is fixed to one end of base plate 101, the outer ring of bearing 504 is pressed into bearing housing 503, and the inner ring is fitted onto one end of lead screw 501 with an interference fit. Drive nut 502 is threadedly engaged with lead screw 501, and the upper end of drive nut 502 is fixed to the bottom surface of propulsion seat 202. When lead screw 501 rotates, the thread pushes drive nut 502 to move axially, and drive nut 502 drives propulsion seat 202 to move synchronously. The inner ring of bearing 504 rotates with lead screw 501, the rolling elements reduce friction, and bearing housing 503 bears radial and axial loads and transmits them to base plate 101. Forward or reverse rotation of lead screw 501 changes the direction of movement of propulsion seat 202.

[0029] Example 2:

[0030] Based on Embodiment 1, the solution in Embodiment 1 will be further described in detail below, with reference to the specific working method described in detail: Furthermore, the mounting base 205 is fixedly mounted on the push base 202, the floating guide shaft 206 is fixedly mounted on the mounting base 205, and the sliding sleeve 207 is fixedly mounted on the circuit breaker mounting base 204. When the push base 202 moves, it drives the mounting base 205 and the floating guide shaft 206 to move synchronously. The circuit breaker mounting base 204 slides along the axial direction of the floating guide shaft 206 via the sliding sleeve 207, and the inner wall of the sliding sleeve 207 slides in contact with the outer wall of the floating guide shaft 206. During the movement of the circuit breaker mounting base 204, the relative sliding between the sliding sleeve 207 and the floating guide shaft 206 maintains the direction of movement of the circuit breaker mounting base 204. When the circuit breaker mounting base 204 is subjected to an external force that deviates from the axis of the floating guide shaft 206, the sliding fit between the inner wall of the sliding sleeve 207 and the outer wall of the floating guide shaft 206 restricts the radial displacement of the circuit breaker mounting base 204.

[0031] Furthermore, the first limiting washer 302 is fixedly mounted on the mounting base 205, the second limiting washer 303 is fixedly mounted on the sliding sleeve 207, and the elastic element 301 is sleeved on the outside of the floating guide shaft 206 and located between the first limiting washer 302 and the second limiting washer 303. When the circuit breaker mounting base 204 moves along the floating guide shaft 206, the sliding sleeve 207 drives the second limiting washer 303 to move synchronously, the second limiting washer 303 compresses or releases the elastic element 301, and the elastic element 301 simultaneously abuts against the first limiting washer 302, and the first limiting washer 302 remains fixed relative to the mounting base 205. When the circuit breaker mounting base 204 is subjected to the squeezing force of the guide post 402, the second limiting washer 303 moves toward the first limiting washer 302 and compresses the elastic member 301, and the elastic member 301 generates a reverse thrust; when the squeezing force decreases, the elastic member 301 pushes the second limiting washer 303 and the sliding sleeve 207 to reset.

[0032] Furthermore, the stop ring 208 is fixedly disposed at the end of the floating guide shaft 206 away from the mounting base 205, and the flexible anti-collision pad 209 is fixedly disposed on the side of the stop ring 208 facing the sliding sleeve 207. When the circuit breaker mounting base 204 moves away from the mounting base 205 along the floating guide shaft 206, the sliding sleeve 207 moves synchronously to the end of the floating guide shaft 206, the sliding sleeve 207 contacts and presses against the flexible anti-collision pad 209, and the flexible anti-collision pad 209 generates a reverse buffering force on the sliding sleeve 207 after being compressed, and the stop ring 208 restricts the sliding sleeve 207 from continuing to detach from the floating guide shaft 206.

[0033] Furthermore, the rolling wheel 404 is rotatably mounted outside the guide post 402 via the through pin 405, and the rolling wheel 404 can rotate around the axis of the through pin 405. When the guide post 402 moves, it drives the rolling wheel 404 to move synchronously. After the rolling wheel 404 enters the wedge groove 403, it abuts against the groove wall of the wedge groove 403 and rolls along the groove wall. The rolling of the rolling wheel 404 reduces the sliding friction between the guide post 402 and the wedge groove 403. When the circuit breaker mounting base 204 is squeezed by the groove wall of the wedge groove 403, the rolling wheel 404 transmits the squeezing force to the guide post 402, and the guide post 402 drives the circuit breaker mounting base 204 to move.

[0034] Furthermore, the flared guide section 406 is interconnected with the straight positioning section 407, with the flared guide section 406 located on the entrance side of the straight positioning section 407. When the guide post 402 or the rolling wheel 404 moves with the circuit breaker mounting base 204, it first enters the flared guide section 406. The groove wall of the flared guide section 406 applies a gradually increasing compressive force to the guide post 402 or the rolling wheel 404, guiding the guide post 402 or the rolling wheel 404 to move towards the straight positioning section 407. After the guide post 402 or the rolling wheel 404 enters the straight positioning section 407, the groove wall of the straight positioning section 407 applies a stable compressive force to the guide post 402 or the rolling wheel 404, restricting the lateral displacement of the guide post 402 or the rolling wheel 404.

[0035] Furthermore, when the lead screw 501 rotates, it drives the drive nut 502 to move along the axis of the lead screw 501. The drive nut 502 is fixedly mounted on the push seat 202, and the push seat 202 moves synchronously with the drive nut 502. The rotational motion of the lead screw 501 is converted into the linear motion of the drive nut 502 and the push seat 202. When the push seat 202 moves, it drives the assembly seat 205 and the floating guide shaft 206 to move synchronously.

[0036] Furthermore, the bearing housing 503 is fixedly mounted on the support frame 1, and the bearing 504 is disposed inside the bearing housing 503. The lead screw 501 passes through the inner ring of the bearing 504 and is fixedly engaged with the inner ring of the bearing 504. When the lead screw 501 rotates, the inner ring of the bearing 504 rotates synchronously with the lead screw 501, while the outer ring of the bearing 504 remains fixed relative to the bearing housing 503. The bearing 504 reduces the frictional resistance when the lead screw 501 rotates, and the bearing housing 503 provides support for the bearing 504 and the lead screw 501.

[0037] Furthermore, the guide rail 210 is fixedly mounted on the support frame 1, the slider 212 is fixedly mounted on the bottom end of the push base 202 and slidably mounted outside the guide rail 210, and the limiting block 211 is fixedly mounted on the end of the guide rail 210. When the push base 202 moves, it drives the slider 212 to slide synchronously along the guide rail 210. When the slider 212 moves to the end of the guide rail 210, it contacts the limiting block 211. The limiting block 211 blocks the slider 212 from continuing to slide, thereby limiting the maximum travel of the push base 202.

[0038] Furthermore, the side plates 102 are fixedly mounted on both sides of the base plate 101, the casters 103 are rotatably mounted on the bottom end of the base plate 101, and the brake 104 is movably mounted on the bottom end of the base plate 101 and close to the casters 103. When the support frame 1 is pushed, the casters 103 rotate around their axis and drive the base plate 101 and the side plates 102 to move synchronously. The casters 103 automatically adjust their rolling direction according to the direction of force. When it is necessary to fix the position of the support frame 1, the brake 104 is operated to contact and press the casters 103, the brake 104 restricts the rotation of the casters 103, and the base plate 101 and the side plates 102 stop moving.

[0039] Finally, the following points should be noted: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection", and "linkage" should be interpreted broadly, and can be mechanical or electrical connections, or internal connections between two components, or direct connections. "Up", "down", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may change. Secondly, the accompanying drawings of the embodiments disclosed in this utility model only involve the structures involved in the embodiments disclosed in this utility model. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this utility model can be combined with each other. Finally, the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A circuit breaker trolley, comprising a support frame, characterized in that: Also includes: The secondary propulsion mechanism includes a main guide member disposed on the support frame, a propulsion seat slidably disposed on the main guide member, a secondary guide member disposed on the propulsion seat, and a circuit breaker mounting seat slidably disposed on the secondary guide member; The resilient buffer assembly includes a resilient element that abuts against the push seat and the circuit breaker mounting seat; The alignment and positioning assembly includes a positioning member disposed on the support frame and having a wedge-shaped groove, and a guide column disposed on the circuit breaker mounting base; When the propulsion seat moves along the main guide member, the elastic member pushes the circuit breaker mounting seat to move synchronously; the guide post then slides into the wedge groove and is squeezed by the groove wall of the wedge groove, causing the circuit breaker mounting seat to slide along the secondary guide member and compress the elastic member.

2. The circuit breaker truck of claim 1, wherein: The auxiliary guide includes an assembly base and a floating guide shaft. The assembly base is disposed on the propulsion base, and the floating guide shaft is disposed on the assembly base. The circuit breaker mounting base is provided with a sliding sleeve, which is sleeved on the outside of the floating guide shaft and slides in cooperation with the floating guide shaft.

3. The circuit breaker truck of claim 2, wherein: The elastic buffer assembly further includes a first limiting washer and a second limiting washer. The first limiting washer is disposed on the mounting base, and the second limiting washer is disposed on the sliding sleeve. The elastic element is sleeved on the outside of the floating guide shaft, and the two ends of the elastic element abut against the first limiting washer and the second limiting washer, respectively.

4. The circuit breaker truck of claim 2, wherein: The floating guide shaft is provided with a stop ring and a flexible anti-collision pad at one end away from the mounting base. The stop ring is located at the end of the floating guide shaft, and the flexible anti-collision pad is located on the side of the stop ring facing the sliding sleeve. The sliding sleeve abuts against the flexible anti-collision pad.

5. The circuit breaker truck of claim 1, wherein: The alignment and positioning assembly also includes a rolling wheel and a through pin. The rolling wheel is disposed outside the guide post through the through pin, and the rolling wheel can enter and abut against the wedge groove.

6. The circuit breaker truck of claim 1, wherein: The wedge-shaped groove includes a flared guide section and a straight positioning section, wherein the flared guide section is connected to the straight positioning section.

7. The circuit breaker truck of claim 1, wherein: It also includes a drive mechanism, which includes a lead screw and a drive nut. The lead screw is disposed inside the support frame, and the drive nut is disposed on the push seat and threadedly engaged with the lead screw.

8. The circuit breaker truck of claim 7, wherein: The drive mechanism also includes a bearing housing and a bearing, the bearing housing is disposed on the support frame, and the lead screw passes through the bearing housing and the bearing.

9. The circuit breaker truck of claim 1, wherein: The main guiding component includes a guide rail and a limiting block. The bottom end of the push seat is provided with a slider, which is slidably disposed outside the guide rail. The limiting block can limit the sliding of the slider.

10. The circuit breaker truck of claim 1, wherein: The support frame includes a base plate, side plates, casters, and brake components. The side plates are disposed on both sides of the base plate, and the casters and brake components are disposed at the bottom end of the base plate.

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