Maintenance car for handcart type circuit breaker

Abstract

The invention discloses a maintenance car for a handcart type circuit breaker, and solves the technical problem that the handcart type circuit breaker is easy to collide and vibrate in the maintenance process in the prior art. The maintenance car of the handcart type circuit breaker comprises a box type frame, a plurality of walking wheels fixed to the corners of the lower surface of the box type frame respectively, a supporting frame used for supporting the handcart type circuit breaker and a plurality of electric push rods running synchronously, and each electric push rod comprises a push rod body and a telescopic rod stretching out and drawing back relative to the push rod body. The push rod body is fixed to the corner of the upper surface of the box-shaped frame, the telescopic rod is supported by the corner of the lower surface of the supporting frame, a containing cavity is defined by the box-shaped frame, a first opening is formed in the upper surface of the box-shaped frame, an operation space is defined between the containing cavity and the supporting frame, and a second opening communicated with the first opening is formed in the side face of the box-shaped frame. An inlet of the operation space is formed between the second opening and the supporting frame, and the electric push rod pushes the supporting frame base to do lifting motion so as to change the size of the operation space and the size of the inlet.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of handcart type circuit breaker maintenance, in particular to a handcart type circuit breaker maintenance vehicle. BACKGROUND

[0002] 10KV handcart type circuit breaker, also known as 10KV handcart switch, is a core equipment of substation, which undertakes circuit control and protection functions.

[0003] When maintaining 10KV handcart type circuit breaker, usually multiple workers are needed to cooperate to move the handcart type circuit breaker from the original installation position to the ground or temporary support table, and then move it back to the installation position after maintenance. The handcart type circuit breaker is prone to collision and vibration during the moving process, which may cause damage to the internal precision components of the equipment. Moreover, when maintaining the bottom parts of the handcart type circuit breaker, it also needs to be turned over, and the handcart type circuit breaker is inevitably subjected to collision and vibration during the turning process. SUMMARY

[0004] The present application is proposed to overcome the deficiencies of the prior art, and provides a handcart type circuit breaker maintenance vehicle to solve the technical problem of the handcart type circuit breaker being prone to collision and vibration during maintenance.

[0005] In order to achieve the above technical target, the handcart type circuit breaker maintenance vehicle provided by the present application comprises: a box type frame, which defines a container cavity inside; a plurality of walking wheels, which are respectively fixed to the corner portions of the lower surface of the box type frame; a supporting frame for supporting the handcart type circuit breaker; and a plurality of electric push rods operating synchronously, the electric push rod comprising a push rod body and a telescopic rod extending and retracting relative to the push rod body, the push rod body being fixed to the corner portions of the upper surface of the box type frame, and the telescopic rod being supported on the corner portions of the lower surface of the supporting frame, the upper surface of the box type frame is provided with a first opening, so as to define an operation space between the bottom of the container cavity and the supporting frame, the side surface of the box type frame forms a second opening communicating with the first opening, so as to form an entrance of the operation space between the second opening and the supporting frame, and the electric push rod drives the supporting frame to make lifting movement to change the size of the operation space and the entrance.

[0006] The maintenance vehicle of the handcart type circuit breaker has the following advantages: the bottom box type frame, the upper supporting frame and the electric push rod which is extended between the box type frame and the supporting frame can make the supporting frame move up and down relative to the box type frame to adjust the height from the ground, so that the maintenance vehicle can be smoothly connected with the handcart type circuit breaker to be maintained, and the probability of collision and vibration is reduced; secondly, the operation space and the entrance of the operation space are formed between the box type frame and the supporting frame, and the size of the operation space and the entrance can be changed by lifting the supporting frame, so that the operator can enter the operation space and maintain the bottom parts of the handcart type circuit breaker under the supporting frame when the bottom parts of the handcart type circuit breaker need to be maintained, and the handcart type circuit breaker does not need to be turned over, which not only avoids the collision and vibration during turning over, but also greatly saves the difficulty of maintenance and improves the maintenance efficiency of the handcart type circuit breaker; furthermore, the cavity defined by the box type frame constitutes part of the operation space, so that the supporting frame does not need to be lifted to a large height relative to the box type frame to make the operation space have a sufficient size, thereby reducing the extension stroke required by the electric push rod, which not only reduces the cost, but also improves the operation stability of the electric push rod; finally, the electric push rod is supported at the corner of the box type frame and the supporting frame, so that the supporting frame can be more stably supported.

[0007] As a preferred, it further comprises a push rod stabilizing mechanism, the push rod stabilizing mechanism comprises a positioning ring and two inclined struts, one end of the push rod body is sleeved and connected to the positioning ring away from the box type frame, one end of the two inclined struts is connected to the two sides of the positioning ring respectively, and the other end is connected to the two edge parts adjacent to the push rod body on the upper surface of the box type frame respectively.

[0008] The above technical scheme makes the push rod body of the electric push rod more stably fixed on the box type frame, provides stable guide support for the extension of the extension rod, and makes the lifting movement of the supporting frame more stable.

[0009] As a preferred, the supporting frame comprises a frame body and a supporting mechanism supported on the frame body, the supporting mechanism comprises horizontally spaced first and second brackets, the first and second brackets are respectively limited on the two sides of the handcart type circuit breaker, and the first and second brackets respectively have upwardly protruding limiting piles which are inserted and positioned with the shell of the handcart type circuit breaker.

[0010] The above technical scheme makes the handcart type circuit breaker more stably supported on the supporting frame by arranging the first and second brackets which are limited on the two sides of the handcart type circuit breaker and the limiting piles which are upwardly protruded on the first and second brackets.

[0011] Preferably, the first bracket and the second bracket are further provided with positioning holes for fixing the first bracket and the second bracket to the handcart type circuit breaker respectively by fasteners.

[0012] The handcart type circuit breaker can be further stably supported on the support frame.

[0013] Preferably, the support mechanism further comprises a screw rod horizontally arranged and rotationally connected to the frame body, a driving member for driving the screw rod to rotate, and a first sliding block and a second sliding block rotationally connected to the screw rod, the first sliding block being fixedly connected to the first bracket, and the second sliding block being fixedly connected to the second bracket, the screw rod being sequentially provided with a first threaded section and a second threaded section with opposite screw directions in the axial direction of the screw rod, the first sliding block being screwed to the first threaded section, and the second sliding block being screwed to the second threaded section, the rotation of the screw rod causing the first sliding block and the second sliding block to move towards or away from each other to adjust the distance between the first bracket and the second bracket.

[0014] The first sliding block and the second sliding block screwed to the screw rod can move towards or away from each other with the rotation of the screw rod, and the distance between the first bracket and the second bracket can be adjusted, so that the support mechanism can be adapted to handcart type circuit breakers of different sizes.

[0015] Preferably, the driving member is a hand wheel coaxially fixedly connected to the screw rod.

[0016] The operator can drive the screw rod to rotate by rotating the hand wheel, which reduces the complexity of the support mechanism and thus reduces the cost of the support mechanism.

[0017] Preferably, the support mechanism further comprises a guide rod arranged horizontally, and the first bracket and the second bracket are provided with guide holes for guiding the guide rod.

[0018] The first bracket and the second bracket can slide more stably.

[0019] Preferably, the support mechanism further comprises an anti-toppling mechanism, the support frame is provided with a hanging ring, and the anti-toppling mechanism comprises a first hook, a second hook, and a screwing plate, the first hook comprises a first hook body for hanging on the housing of the handcart type circuit breaker and a first screw rod formed by extending from one end of the first hook body, the second hook comprises a second hook body for hanging on the hanging ring and a second screw rod formed by extending from one end of the second hook body, the screw threads of the first screw rod and the second screw rod are opposite, and the screwing plate is provided with threaded holes at both ends for screwing with the first screw rod and the second screw rod respectively.

[0020] By adopting the aforementioned technical solution, the handcart-type circuit breaker is more stably supported on the support frame, reducing the risk of the handcart-type circuit breaker falling off the support frame during maintenance.

[0021] Preferably, there are two hook-up rings located on opposite sides of the handcart-type circuit breaker, and two anti-intrusion mechanisms are provided accordingly.

[0022] By adopting the aforementioned technical solution, the handcart-type circuit breaker is more stably supported on the support frame, further reducing the risk of the handcart-type circuit breaker falling off the support frame during maintenance.

[0023] Preferably, the system also includes a control module and a display module. A pressure sensor is provided on the telescopic rod. The pressure sensor is electrically connected to the control module to send a pressure signal to the control module. The control module is electrically connected to the display module to display the pressure value of the pressure sensor.

[0024] By adopting the aforementioned technical solution, a pressure sensor is installed on the telescopic rod, which allows operators to determine whether the support frame and the handcart circuit breaker it carries are in a stable state by displaying the pressure value on the display module when driving the electric push rod to raise and lower the support frame. This reduces the probability of the handcart circuit breaker falling during the raising and lowering of the support frame.

[0025] These features and advantages of the present invention will be disclosed in detail in the following specific embodiments and accompanying drawings. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the box-type frame in an embodiment of the present invention; Figure 2 This is a schematic diagram of the support frame in an embodiment of the present invention; Figure 3 This is a schematic diagram of the electric actuator in an embodiment of the present invention; Figure 4 This is a schematic diagram of a maintenance vehicle for a handcart-type circuit breaker in an embodiment of the present invention.

[0027] Figure label: 10. Handcart-type circuit breaker; 100. Box-shaped frame; 101. Cavity; 102. First opening; 103. Second opening; 110. Operating space; 111. Entrance; 120. Push rod stabilizing mechanism; 121. Positioning ring; 122. Diagonal brace. 200. Walking wheels; 300. Support frame; 310. Frame body; 311. Bottom frame; 312. Beam frame; 320. Support mechanism; 321. First bracket; 321a. Limiting post; 322. Second bracket; 322a. Positioning hole; 323. Lead screw; 323a. First threaded section; 323b. Second threaded section; 324. Driving component; 325. First slider; 326. Second slider; 327. Guide rod; 328. Bearing seat; 330. Hanging ring; 400. Electric actuator; 410. Actuator body; 420. Telescopic rod; 421. Pressure sensor; 500. Anti-tipping mechanism; 510. First hook; 511. First hook body; 512. First screw; 520. Second hook; 521. Second hook body; 522. Second screw; 530. Threaded plate. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be explained and described below with reference to the accompanying drawings. However, the following embodiments are only preferred embodiments of the present invention and not all of them. Other embodiments obtained by those skilled in the art based on the embodiments in the implementation methods without creative effort are all within the protection scope of the present invention.

[0029] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0030] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" or "a number" means two or more, unless otherwise expressly defined.

[0031] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0032] like Figures 1 to 4 As shown, the maintenance cart for the handcart-type circuit breaker proposed in this embodiment of the invention includes a box-type frame 100, a plurality of wheels 200, a support frame 300, and a plurality of synchronously operating electric push rods 400. The wheels 200 are respectively fixed to the corners of the lower surface of the box-type frame 100. The support frame 300 supports the handcart-type circuit breaker 10. Each electric push rod 400 includes a push rod body 410 and a telescopic rod 420 that extends and retracts relative to the push rod body 410. The push rod body 410 is fixed to the corner of the upper surface of the box-type frame 100, and the telescopic rod 420 is supported on the corner of the lower surface of the support frame 300. The synchronous movement of the plurality of electric push rods 400 causes the support frame 300 to move up and down relative to the box-type frame 100.

[0033] In this embodiment, the upper and lower surfaces of the box frame 100 and the lower surface of the support frame 300 are both rectangular, and correspondingly, there are four walking wheels 200 and four electric push rods 400.

[0034] In some other embodiments, the upper and lower surfaces of the box frame 100 and the lower surface of the support frame 300 may also be configured in other shapes, such as pentagons or hexagons.

[0035] A cavity 101 is defined within the box-shaped frame 100. A first opening 102 is provided on the upper surface of the box-shaped frame 100, thereby defining an operating space 110 between the bottom of the cavity 101 and the support frame 300. A second opening 103 is formed on the side of the box-shaped frame 100, communicating with the first opening 102, thereby forming an entrance 111 of the operating space 110 between the second opening 103 and the support frame 300. The lifting and lowering movement of the support frame 300 can change the size of the operating space 110 and the entrance 111.

[0036] The trolley-type circuit breaker 10 is installed in the trolley compartment of the trolley switchgear. When the trolley-type circuit breaker 10 needs to be inspected, it can be pulled out of the trolley compartment. Since the support frame 300 can be adjusted above the ground by the electric push rod 400, the support frame 300 can be connected to the trolley-type circuit breaker 10 with no or very little drop, reducing the probability of collision and vibration when the trolley-type circuit breaker 10 is moved to the maintenance vehicle.

[0037] When it is necessary to inspect the bottom components of the handcart-type circuit breaker 10, the electric push rod 400 can be driven to raise the support frame 300, thereby increasing the size of the operating space 110 and the entrance 111, making it convenient for operators to enter the operating space 110 from outside the maintenance vehicle to operate the bottom of the handcart-type circuit breaker 10.

[0038] The maintenance trolley for the handcart-type circuit breaker proposed in this invention utilizes a bottom box-type frame 100, an upper support frame 300, and an electric push rod 400 that extends and retracts between the box-type frame 100 and the support frame 300. This allows the support frame 300 to move up and down relative to the box-type frame 100 to adjust its ground clearance, ensuring a smooth connection between the maintenance trolley and the handcart-type circuit breaker 10 requiring maintenance and reducing the probability of collisions and vibrations. Furthermore, an operating space 110 and an entrance 111 are formed between the box-type frame 100 and the support frame 300. The size of the operating space 110 and the entrance 111 is changed by raising and lowering the support frame 300. When the bottom components of the handcart-type circuit breaker 10 require maintenance, the size of the operating space 110 and the entrance 111 can be increased to allow operators to enter the operating space. The bottom components of the trolley circuit breaker 10 are inspected within the 110 space and below the support frame 300. The trolley circuit breaker 10 does not need to be flipped, avoiding collisions and vibrations during flipping, greatly reducing the difficulty of inspection, and improving the inspection efficiency of the trolley circuit breaker 10. Furthermore, since the cavity 101 defined by the box frame 100 constitutes part of the operating space 110, the support frame 300 does not need to be significantly raised relative to the box frame 100 to ensure the operating space 110 has sufficient size. This reduces the required extension stroke of the electric push rod 400, lowering costs and improving the operational stability of the electric push rod 400. Finally, the electric push rod 400 is supported at the corners of the box frame 100 and the support frame 300, allowing the support frame 300 to provide more stable support.

[0039] In this preferred embodiment, such as Figure 4 As shown, the maintenance vehicle also includes a push rod stabilizing mechanism 120. The push rod stabilizing mechanism 120 includes a positioning ring 121 and two diagonal braces 122. The positioning ring 121 is sleeved and connected to one end of the push rod body 410 away from the box frame 100. One end of the two diagonal braces 122 is connected to both sides of the positioning ring 121, and the other end is connected to two sides of the upper surface of the box frame 100 adjacent to the push rod body 410.

[0040] The positioning ring 121 forms a support structure suspended above the upper surface of the box frame 100 by two diagonal braces 122. One end of the push rod body 410 is fixed to the upper surface of the box frame 100, and the other end is confined in the support structure, so that the push rod body 410 can be more stably fixed to the box frame 100.

[0041] With the above settings, the push rod body 410 of the electric push rod 400 can be more stably fixed on the box frame 100, providing stable guiding support for the extension and retraction of the telescopic rod 420, thereby making the lifting and lowering movement of the support frame 300 more stable.

[0042] In another preferred embodiment, such as Figure 3 As shown, the maintenance vehicle also includes a control module and a display module. A pressure sensor 421 is installed on the telescopic rod 420. The pressure sensor 421 is electrically connected to the control module to send a pressure signal to the control module. The control module is electrically connected to the display module to display the pressure value of the pressure sensor 421.

[0043] Specifically, the pressure sensor 421 is mounted on one end of the support frame 300 of the telescopic rod 420.

[0044] In this embodiment, four electric actuators 400 are provided, and four pressure sensors 421 are provided accordingly. The display module displays four pressure values.

[0045] By installing a pressure sensor 421 on the telescopic rod 420, the operator can determine whether the support frame 300 and the handcart circuit breaker 10 it carries are in a stable state by using the pressure value on the display module when driving the electric push rod 400 to raise and lower the support frame 300, thereby reducing the probability of the handcart circuit breaker 10 falling during the raising and lowering of the support frame 300.

[0046] Based on the foregoing embodiments, such as Figure 2 , Figure 4 As shown, in this embodiment, the support frame 300 includes a frame body 310 and a support mechanism 320 supported on the frame body 310. The support mechanism 320 includes a first bracket 321 and a second bracket 322 that are horizontally spaced apart. The first bracket 321 and the second bracket 322 are respectively located on both sides of the handcart-type circuit breaker 10, and the first bracket 321 and the second bracket 322 are respectively provided with a limiting post 321a that is inserted and positioned with the outer shell of the handcart-type circuit breaker.

[0047] The first bracket 321 includes a base plate supported on the handcart-type circuit breaker 10 and a side plate limited to the side of the handcart-type circuit breaker 10, with a limiting post 321a disposed on the base plate. The second bracket 322 is a mirror image of the first bracket 321.

[0048] By setting a first bracket 321 and a second bracket 322 that are limited to both sides of the handcart-type circuit breaker 10, and a limiting post 321a that protrudes upward on the first bracket 321 and the second bracket 322, the handcart-type circuit breaker 10 can be more stably supported on the support frame 300.

[0049] In a preferred embodiment, such as Figure 2 , Figure 4 As shown, the first bracket 321 and the second bracket 322 are also provided with positioning holes 322a on their sides. The positioning holes 322a are used to fix the first bracket 321 and the second bracket 322 to the handcart-type circuit breaker 10 respectively by fasteners.

[0050] Positioning holes 322a are respectively opened on the side plates of the first bracket 321 and the second bracket 322. Fasteners pass through the positioning holes 322a and are screwed into the housing of the handcart circuit breaker 10, thereby fixing the handcart circuit breaker 10 to the first bracket 321 and the second bracket 322.

[0051] This allows the handcart-type circuit breaker 10 to be more stably supported on the support frame 300.

[0052] In another preferred embodiment, such as Figure 2 , Figure 4 As shown, the support mechanism 320 also includes a lead screw 323 horizontally arranged and rotatably connected to the frame body 310, a drive member 324 for driving the lead screw 323 to rotate, and a first slider 325 and a second slider 326 rotatably connected to the lead screw 323. The first slider 325 is fixedly connected to the first bracket 321, and the second slider 326 is fixedly connected to the second bracket 322. The lead screw 323 has a first threaded section 323a and a second threaded section 323b with opposite thread directions in sequence along its axial direction. The first slider 325 is screwed to the first threaded section 323a, and the second slider 326 is screwed to the second threaded section 323b. The rotation of the lead screw 323 causes the first slider 325 and the second slider 326 to move towards each other or away from each other to adjust the distance between the first bracket 321 and the second bracket 322.

[0053] The frame body 310 is L-shaped, comprising a horizontally extending base frame 311 and a vertically extending beam frame 312. A bearing seat 328 is provided on the beam frame 312, and a lead screw 323 is rotatably connected to the bearing seat 328. The first bracket 321 and the second bracket 322 are located above the base frame 311 and are supported by the base frame 311, allowing them to move in opposite directions or away from each other.

[0054] By setting a lead screw 323 with two sections of threads in opposite directions, the first slider 325 and the second slider 326 screwed to the lead screw 323 can move towards or away from each other as the lead screw 323 rotates, making the distance between the first bracket 321 and the second bracket 322 adjustable, so that the support mechanism 320 can be adapted to handcart-type circuit breakers of different sizes.

[0055] In a more preferred embodiment, such as Figure 2 , Figure 4 As shown, the support mechanism 320 also includes a horizontally arranged guide rod 327, and the first bracket 321 and the second bracket 322 are provided with guide holes that cooperate with the guide rod 327.

[0056] This allows the first bracket 321 and the second bracket 322 to slide more smoothly.

[0057] In another, more preferred embodiment, such as Figure 2 , Figure 4 As shown, the driving component 324 is a hand crank, which is coaxially and fixedly connected to the lead screw 323.

[0058] The operator can drive the lead screw 323 to rotate by rotating a handbell, which reduces the complexity of the support mechanism 320 and thus reduces the cost of the support mechanism 320.

[0059] Based on all the aforementioned embodiments, such as Figure 2 , Figure 4 Figure 2 Figure 4 As shown, in this embodiment, the maintenance vehicle also includes an anti-tipping mechanism. The support frame 300 is provided with a hook ring 330. The anti-tipping mechanism includes a first hook 510, a second hook 520, and a screw plate 530. The first hook 510 includes a first hook body 511 that is attached to the housing of the handcart-type circuit breaker 10 and a first screw 512 that extends from one end of the first hook body 511. The second hook 520 includes a second hook body 521 that is attached to the hook ring 330 and a second screw 522 that extends from one end of the second hook body 521. The threads of the first screw 512 and the second screw 522 are opposite. The two ends of the screw plate 530 are provided with threaded holes that are respectively screwed to the first screw 512 and the second screw 522.

[0060] The second hook 521 is hooked into the hook ring 330. The straight-line distance between the first hook 511 and the second hook 521 is adjusted by rotating the screw plate 530 so that the first hook 511 can be hooked onto the housing of the handcart-type circuit breaker 10. The screw plate 530 is then rotated to shorten the straight-line distance between the first hook 511 and the second hook 521, thereby tightening the anti-tipping mechanism 500 between the handcart-type circuit breaker 10 and the support frame 300.

[0061] This design allows the handcart circuit breaker 10 to be more stably supported on the support frame 300, reducing the risk of the handcart circuit breaker 10 falling off the support frame 300 during maintenance.

[0062] In this preferred embodiment, two hook-up rings 330 are provided and located on opposite sides of the handcart-type circuit breaker 10, and two anti-intrusion mechanisms 500 are provided accordingly.

[0063] In this way, the handcart circuit breaker 10 is more stably supported on the support frame 300, further reducing the risk of the handcart circuit breaker 10 falling off the support frame 300 during maintenance.

[0064] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Those skilled in the art should understand that the present invention includes, but is not limited to, the contents described in the accompanying drawings and the specific embodiments above. Any modifications that do not depart from the functional and structural principles of the present invention will be included within the scope of the claims.

Claims

1. A maintenance vehicle for handcart-type circuit breakers, characterized in that, include: A box-shaped frame that defines an internal cavity; Several wheels are fixed to the corners of the lower surface of the box frame; Support frame, which is used to support the handcart-type circuit breaker; as well as, Several electrically operated linear actuators operate synchronously. Each linear actuator includes a actuator body and a telescopic rod that extends and retracts relative to the actuator body. The actuator body is fixed to a corner of the upper surface of the box-shaped frame, and the telescopic rod is supported at a corner of the lower surface of the support frame. The upper surface of the box-shaped frame is provided with a first opening, which defines an operating space between the bottom of the cavity and the support frame. The side of the box-shaped frame forms a second opening that connects to the first opening, so that the second opening and the support frame form an entrance to the operating space. The electric push rod pushes the support frame seat to move up and down to change the size of the operating space and the entrance.

2. The maintenance vehicle as described in claim 1, characterized in that, It also includes a push rod stabilizing mechanism, which includes a positioning ring and two diagonal braces. The positioning ring is sleeved and connected to one end of the push rod body away from the box frame. One end of each of the two diagonal braces is connected to both sides of the positioning ring, and the other end is connected to two sides of the upper surface of the box frame adjacent to the push rod body.

3. The maintenance vehicle as described in claim 1, characterized in that, The support frame includes a frame body and a support mechanism supported on the frame body. The support mechanism includes a first bracket and a second bracket that are horizontally spaced apart. The first bracket and the second bracket are respectively located on both sides of the handcart circuit breaker, and the first bracket and the second bracket are respectively provided with a limiting post that is inserted and positioned to connect with the outer shell of the handcart circuit breaker.

4. The maintenance vehicle as described in claim 3, characterized in that, The first bracket and the second bracket are also provided with positioning holes on their sides. The positioning holes are used to fix the first bracket and the second bracket to the handcart circuit breaker respectively by fasteners.

5. The maintenance vehicle as described in claim 3, characterized in that, The support mechanism further includes a lead screw horizontally arranged and rotatably connected to the frame body, a drive component for driving the lead screw to rotate, and a first slider and a second slider rotatably connected to the lead screw. The first slider is fixedly connected to a first bracket, and the second slider is fixedly connected to a second bracket. The lead screw has a first threaded section and a second threaded section with opposite thread directions in sequence along its axial direction. The first slider is screwed to the first threaded section, and the second slider is screwed to the second threaded section. The rotation of the lead screw causes the first slider and the second slider to move towards each other or away from each other to adjust the distance between the first bracket and the second bracket.

6. The maintenance vehicle as described in claim 5, characterized in that, The driving component is a hand crank, which is fixedly connected coaxially to the lead screw.

7. The maintenance vehicle as described in claim 5, characterized in that, The support mechanism further includes a horizontally arranged guide rod, and the first bracket and the second bracket are provided with guide holes that cooperate with the guide rod.

8. The maintenance vehicle as described in claim 1, characterized in that, It also includes an anti-tipping mechanism. The support frame is provided with a hook ring. The anti-tipping mechanism includes a first hook, a second hook, and a screw plate. The first hook includes a first hook body that is attached to the housing of the handcart-type circuit breaker and a first screw extending from one end of the first hook body. The second hook includes a second hook body that is attached to the hook ring and a second screw extending from one end of the second hook body. The threads of the first screw and the second screw are opposite. The two ends of the screw plate are provided with threaded holes that are respectively screwed to the first screw and the second screw.

9. The maintenance vehicle as described in claim 8, characterized in that, Two hook-up rings are provided and located on opposite sides of the handcart-type circuit breaker, and two anti-intrusion and overturning mechanisms are provided accordingly.

10. The maintenance vehicle as described in claim 1, characterized in that, It also includes a control module and a display module. The telescopic rod is equipped with a pressure sensor. The pressure sensor is electrically connected to the control module to send a pressure signal to the control module. The control module is electrically connected to the display module so that the display module displays the pressure value of the pressure sensor.

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