A height and width adjustable circuit breaker transfer trolley

Abstract

The present application discloses a circuit breaker transport trolley with adjustable height and width, which can rotate the transmission shaft with the help of an external rotating handle, and the transmission shaft drives the gear to rotate, so that the gear in the same guide tube drives the upper and lower racks to move towards each other, and the rack drives the supporting connecting rod to do shearing movement, so that the supporting connecting rod can drive the work surface to move upward to the required height, and accordingly, the work surface can be moved downward by rotating the rotating handle in the opposite direction; then the working table width of the transport trolley is adjusted according to the size of the transported circuit breaker, such as when transporting a large circuit breaker, the left and right folding side baffles can be unfolded, and when transporting a small circuit breaker, the left and right folding side baffles can be flipped and folded. The transport trolley can ensure that the overall height of the transport trolley is consistent after adjustment, and the transport trolley will not be damaged. It can also realize the transportation of multiple types of circuit breakers by flipping the folding side baffles, which can improve the transportation efficiency and safety of circuit breakers and reduce the difficulty of transportation.

Description

Technical Field

[0001] The present application relates to the field of circuit breaker transportation applications, and in particular to a circuit breaker transportation trolley with adjustable height and width. Background Art

[0002] During factory inspection and maintenance of the KYN28-12 switchgear, the circuit breaker (isolation vehicle) needs to be installed in the switchgear, the overall performance of the switchgear needs to be tested, and the circuit breaker (isolation vehicle) needs to be removed from the switchgear for maintenance and repair. The circuit breaker transfer trolley plays an important role in the installation and removal of the circuit breaker.

[0003] The transfer carts currently in use are mainly special-purpose vehicles, that is, for 800mm circuit breakers, an 800mm transfer cart is used, and for 1000mm circuit breakers, a 1000mm transfer cart is used. This results in the need for at least two transfer carts for distribution cabinets equipped with circuit breakers of different models, resulting in low transfer efficiency and great difficulty. At the same time, the height adjustment of the transfer cart is currently mainly completed by adjusting the four nylon handwheels installed on the load-bearing bolts at the four corners. Since the four nylon handwheels are not related to each other, the adjustment efficiency is relatively low, and it is difficult to ensure that the overall height of the transfer cart is consistent after adjustment. If it is inconsistent, the lifting table of the transfer cart will be distorted and deformed during the process of transporting the circuit breaker, damaging the transfer cart, and there are safety issues.

[0004] It can be seen from this that how to design a circuit breaker transfer trolley with adjustable height and width to solve the problems of low efficiency, difficulty and low safety of circuit breaker transfer. Summary of the invention

[0005] The present application provides a circuit breaker transport trolley with adjustable height and width, which solves the problems of low efficiency, great difficulty and low safety of circuit breaker transport in the prior art.

[0006] In order to solve the above technical problems, the present application provides a circuit breaker transfer trolley with adjustable height and width, comprising:

[0007] A transfer trolley body, wherein a universal wheel is installed at the bottom of the transfer trolley body, guide rail tubes are arranged on opposite sides of the transfer trolley body, a bearing seat is arranged on the transfer trolley body, a transmission shaft is installed on the bearing seat, and both ends of the transmission shaft respectively penetrate the two guide rail tubes and extend to one side of the guide rail tube, and both ends of the transmission shaft are arranged with gears, and the gears are located in the guide rail tubes;

[0008] The guide rail tube is provided with a slide groove on both the upper and lower sides, a limit notch is provided on the upper part of one end of the guide rail tube, and a limit groove is provided on the other end, a slider is provided at the limit notch and the limit groove, the slider is located in the slide groove, a rack is fixed on one side of the slider, the rack is slidably installed in the slide groove, the gear is located between the racks, and the gear is meshed with the rack;

[0009] The slider is provided with a rotating shaft, and both ends of the rotating shaft are rotatably connected with supporting rods. The supporting rods on the two sliders on the same side are cross-arranged, and a workbench is provided at the upper end of the supporting rod. Folding side baffles are rotatably provided at the opposite ends of the workbench.

[0010] Preferably, the end of the transmission shaft extending to the outside of one side of the guide rail tube is a square shaft.

[0011] Preferably, a baffle is further provided on the side of the transfer trolley body close to the guide rail tube, and a through hole corresponding to the transmission shaft is provided on the baffle.

[0012] Preferably, it also includes:

[0013] A one-way locking mechanism for the transmission shaft, wherein the one-way locking mechanism for the transmission shaft is located between the baffle and the guide rail tube closest to the baffle;

[0014] The one-way locking mechanism of the transmission shaft includes a locking mechanism gear installed on the square shaft, a fixed groove fixed on the body of the transfer trolley, a stopper, a torsion spring and a knob, a fixed shaft passes through both sides of the fixed groove, the torsion spring and the stopper are rotatably connected to the fixed shaft, the knob is fixedly connected to the stopper, and the knob passes through the through hole and extends to one side of the through hole, and the structure of the side of the stopper close to the locking mechanism gear corresponds to the tooth structure on the locking mechanism gear.

[0015] Preferably, it also includes:

[0016] Two fixed plates are arranged on the back side of the workbench, and a grounding knife rotating handle is rotatably mounted on the fixed plate. A limit block and a spring are arranged on the grounding knife rotating handle, and the spring is located between the limit block and the fixed plate close to the distribution cabinet.

[0017] Preferably, notches are provided at opposite ends of the workbench, a support rod is provided on one side of the notch, and a protrusion is provided on the support rod and at a position of the workbench close to the notch;

[0018] Correspondingly, a first groove corresponding to the support rod is provided on one side of the folding side baffle, and the support rod is located in the first groove. A flip handle is fixed on one side of the folding side baffle, and the flip handle passes through the folding side baffle and extends into the first groove. The two ends of the flip handle respectively pass through the two raised portions and extend to one side of the raised portions respectively, and one end of the flip handle is bent.

[0019] Preferably, a limiting plate is further provided on a side of the foldable side baffle close to the workbench.

[0020] Preferably, a second groove is also provided on the folding side baffle, and a plurality of third grooves are provided on one side of the second groove, each of the third grooves is connected to and perpendicular to the second groove, and a movable pin is provided in the second groove, and both ends of the movable pin respectively pass through the folding side baffle and extend to both sides of the folding side baffle, and a limit pin is vertically provided on the movable pin, and the limit pin is located in the corresponding third groove.

[0021] Preferably, the workbench is also provided with positioning pins and hooks.

[0022] Preferably, a double-door box is also provided on one side of the transfer trolley body.

[0023] Compared with the prior art, the height and width adjustable circuit breaker transport trolley provided by the present application can rotate the transmission shaft with the help of an external rotating handle, and the transmission shaft drives the gear to rotate, so that the gear in the same guide tube drives the upper and lower racks to move in opposite directions, and the rack drives the supporting connecting rod to do shearing movement, so that the supporting connecting rod can drive the workbench to move upward to the required height, and accordingly, the workbench can be moved downward by rotating the rotating handle in the opposite direction; then the working width of the transport trolley is adjusted according to the size of the transported circuit breaker, such as when transporting a large circuit breaker, the left and right folding side baffles can be unfolded, and the current circuit breaker can be moved to the work surface of the transport trolley; such as when transporting a small circuit breaker, the left and right folding side baffles can be flipped and folded, and the current circuit breaker can be moved to the work surface of the transport trolley. The transport trolley can ensure that the overall height of the transport trolley is consistent after adjustment, and the work surface of the transport trolley will not be twisted and deformed during the process of transporting the circuit breaker, and the transport of multiple models of circuit breakers can be realized by flipping the folding side baffles, which can improve the transport efficiency and transport safety of the circuit breaker and reduce the difficulty of transport. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solution of the present application, the following briefly introduces the drawings required for use in the embodiments. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without inventiveness.

[0025] Figure 1 A schematic diagram of the structure of a circuit breaker transfer trolley with adjustable height and width provided in an embodiment of the present invention;

[0026] Figure 2 A schematic diagram of the structure of another height- and width-adjustable circuit breaker transport trolley provided in an embodiment of the present invention;

[0027] Figure 3 A schematic diagram of a foldable side baffle structure provided by an embodiment of the present invention;

[0028] Figure 4 A schematic diagram of the structure of a one-way locking mechanism for a transmission shaft provided by an embodiment of the present invention;

[0029] Figure 5 A schematic diagram of a workbench structure provided by an embodiment of the present invention;

[0030] Figure 6 A schematic diagram of a guide rail tube structure provided by an embodiment of the present invention;

[0031] In the figure, 1 workbench, 01 fixed plate, 02 support rod, 03 raised part, 2 folding side baffle, 20 first groove, 21 flip handle, 22 limit plate, 23 second groove, 230 movable pin, 2301 limit pin, 24 third groove, 3 rotating handle, 30 limit block, 31 spring, 4 transmission shaft, 40 gear, 5 guide rail tube, 50 slide groove, 51 limit groove, 52 through hole, 6 transfer trolley body, 60 universal wheel, 61 bearing seat, 62 baffle, 620 through hole, 63 double door box, 7 transmission shaft one-way locking mechanism, 70 locking mechanism gear, 71 fixed groove, 710 fixed shaft, 72 block, 73 torsion spring, 74 knob, 8 supporting connecting rod, 9 slider, 90 rotating shaft, 10 rack, 11 square shaft, 12 positioning pin, 13 hook, hook handle 130. DETAILED DESCRIPTION

[0032] In order to enable those skilled in the art to better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings.

[0033] The core of the present application is to provide a circuit breaker transfer trolley with adjustable height and width, which can solve the problems of low efficiency, great difficulty and low safety of circuit breaker transfer in the prior art.

[0034] Figure 1 A schematic diagram of the structure of a circuit breaker transfer trolley with adjustable height and width provided in an embodiment of the present invention. Figure 2 A schematic diagram of the structure of another height and width adjustable circuit breaker transport trolley provided in an embodiment of the present invention, Figure 3 A schematic diagram of a foldable side baffle structure provided by an embodiment of the present invention, Figure 4 A schematic diagram of a one-way locking mechanism for a transmission shaft provided by an embodiment of the present invention. Figure 5 A schematic diagram of a workbench structure provided by an embodiment of the present invention, Figure 6 A schematic diagram of a guide rail tube structure provided by an embodiment of the present invention is shown in FIG. Figures 1 to 6 As shown, the transfer vehicle includes:

[0035] A transfer trolley body 6, a universal wheel 60 is installed at the bottom of the transfer trolley body 6, guide rail tubes 5 are arranged on opposite sides of the transfer trolley body 6, a bearing seat 61 is arranged on the transfer trolley body 6, a transmission shaft 4 is installed on the bearing seat 61, and both ends of the transmission shaft 4 respectively pass through the two guide rail tubes 5 and extend to one side of the guide rail tube 5, and both ends of the transmission shaft 4 are provided with gears 40, and the gears 40 are located in the guide rail tube 5;

[0036] The guide rail tube 5 is provided with a slide groove 50 on both the upper and lower sides. A limit notch is provided on the upper part of one end of the guide rail tube 5, and a limit groove 51 is provided on the other end. A slider 9 is provided at the limit notch and the limit groove 51. The slider 9 is located in the slide groove 50. A rack 10 is fixed on one side of the slider 9. The rack 10 is slidably installed in the slide groove 50. The gear 40 is located between the racks 10, and the gear 40 is meshed with the rack 10.

[0037] A rotating shaft 90 is provided on the slider 9, and support links 8 are rotatably connected to both ends of the rotating shaft 90. The support links 8 on the two sliders 9 on the same side are cross-arranged, and a workbench 1 is provided on the upper end of the support links 8. Folding side baffles 2 are rotatably provided at the opposite ends of the workbench 1.

[0038] Specifically, Figure 1 The foldable side guard 2 in the transfer trolley shown is in a folded state. Figure 2The foldable side baffles 2 in the transfer trolley are shown in an unfolded state. The universal wheels 60 at the bottom of the transfer trolley body 6 can realize the overall mobility of the transfer trolley, and after the transfer trolley is moved into place, in order to ensure the fixed stability of the transfer trolley, the universal wheels 60 can be universal wheels with brakes. The guide rail tube 5 can be fixed at the opposite sides of the transfer trolley body 6 by bolts, and the bearing seat 61 on the transfer trolley body 6 can support the transmission shaft 4. Slide grooves 50 are provided on both upper and lower sides of the two guide rail tubes 5. A limiting notch is provided at an upper position of one end of the guide rail tube 5, and a limiting groove 51 is provided at the other end. The sliders 9 are respectively located at the limiting notch and the limiting groove 51, and the sliders 9 are installed in the slide grooves 50. A rack 10 is fixedly provided on one side of each slider 9, and the rack 10 is slidably installed in the slide grooves 50. Through holes 52 are provided on the two guide rail tubes 5. Both ends of the transmission shaft 4 pass through the through holes 52 respectively, that is, pass through the two guide rail tubes 5 and extend to one side of the guide rail tube 5. Gears 40 are provided at both ends of the transmission shaft 4. The gear 40 is located between the upper and lower racks 10 in the guide rail tube 5, and the gear 40 is meshed with the rack 10, that is, the gear 40 is located at the position of the through hole 52. A rotating shaft 90 is provided on each slider 9, and a workbench 1 is provided on the upper ends of the supporting connecting rods 8 rotatably connected to the two ends of the rotating shaft 90, and the supporting connecting rods 8 on the two sliders 9 on the same guide tube 5 are cross-arranged, and the intersection of the two cross-arranged supporting connecting rods 8 is rotated by a latch, and the folding side baffles 2 are rotatably set at the opposite two ends of the workbench 1, and the folding side baffles 2 can be unfolded or folded according to the size of the circuit breaker to be transported, and the folding side baffles 2 can be unfolded or folded by manual flipping.

[0039] In order to facilitate the rotation operation of the transmission shaft 4 by the external rotating handle 64, based on the above embodiment, as a preferred implementation, the end of the transmission shaft 4 extending to the outside of the guide rail tube 5 can be designed as a square shaft 11, so as to correspond to the structure of the external rotating handle 64. In order to facilitate the storage of the rotating handle 64, as a preferred implementation, a double-door box 63 is also provided on one side of the transfer trolley body 6, and after the rotating handle 64 is used, it can be placed in the double-door box 63 for storage.

[0040] In order to improve the stability of the use of the rotating handle 64, on the basis of the above embodiment, as a preferred implementation mode, a baffle 62 is further provided on the side of the transfer trolley body 6 close to the guide rail tube 5, and a through hole 620 corresponding to the transmission shaft 4 is provided on the baffle 62. The through hole 620 corresponds to the position of the transmission shaft 4. The size of the through hole 620 can be determined according to the size of the rotating handle 64. During specific operation, the rotating handle 64 can be passed through the through hole 620 and then screwed on the square shaft 11.

[0041] In order to prevent the workbench 1 of the transfer trolley from falling back due to the sliding of the rotating handle 64 during the ascending process, based on the above embodiment, as a preferred implementation, it also includes:

[0042] The transmission shaft one-way locking mechanism 7 is located between the baffle 62 and the guide rail tube 5 closest to the baffle 62;

[0043] The one-way locking mechanism 7 of the transmission shaft includes a locking mechanism gear 70 installed on the square shaft 11, a fixed groove 71 fixed on the transfer trolley body 6, a stopper 72, a torsion spring 73 and a knob 74. Fixed shafts 710 pass through both sides of the fixed groove 71. The torsion spring 73 and the stopper 72 are both rotatably connected to the fixed shaft 710. The knob 74 is fixedly connected to the stopper 72, and the knob 74 passes through the through hole 620 and extends to one side of the through hole 620. The structure of the side of the stopper 72 close to the locking mechanism gear 70 corresponds to the tooth structure on the locking mechanism gear 70.

[0044] Specifically, the locking mechanism gear 70 is installed on the square shaft 11 at one end of the transmission shaft 4. The teeth of the locking mechanism gear 70 are a right-angled side plus a semicircular arc structure. The side structure of the stopper 72 close to the locking mechanism gear 70 cooperates with the tooth structure of the locking mechanism gear 70. The stopper 72 is tightly attached to the locking mechanism gear 70 under the action of the torsion spring 73. When the transmission shaft 4 rotates clockwise, the semicircular arc surface of the stopper 72 and the teeth are in a slipping state, and the transmission shaft 4 rotates normally. When the transmission shaft 4 rotates counterclockwise, the teeth on the locking mechanism gear 70 are meshed and bitten by the stopper 72, and the transmission shaft 4 cannot rotate counterclockwise. At the same time, the meshing and biting of the locking mechanism gear 70 and the teeth can keep the workbench 1 of the transfer trolley at a fixed height for a long time. When the workbench 1 of the transfer trolley needs to be lowered, the knob 74 connected to the stopper 72 can be turned, and the transmission shaft 4 can be rotated in the opposite direction using the rotating handle 64. The transmission shaft 4 drives the rack 10 to move so that the workbench 1 moves downward.

[0045] In order to facilitate closing or disconnecting the grounding switch on the power distribution cabinet without moving the transfer trolley, based on the above embodiment, as a preferred implementation method, it also includes:

[0046] Two fixed plates 01 are arranged on the back of the workbench 1. A grounding knife rotating handle 3 is rotatably mounted on the fixed plate 01. A limit block 30 and a spring 31 are arranged on the grounding knife rotating handle 3. The spring 31 is located between the limit block 30 and the fixed plate 01 close to the power distribution cabinet. The back of the workbench 1 refers to the surface facing the transfer trolley body 6 after installation. The rotating handle 3 can be used to control the grounding knife of the power distribution cabinet to be turned on or off. The structure of the end of the rotating handle 3 close to the power distribution cabinet corresponds to the grounding knife switch structure on the power distribution cabinet. The end of the rotating handle 3 away from the power distribution cabinet is bent. When in use, push the rotating handle 3 inward and push it into place, then rotate the rotating handle 3; when not in use, release the rotating handle 3, and the rotating handle 3 can be retracted to its original position under the action of the spring elastic force.

[0047] In order to improve the convenience of unfolding or folding the foldable side baffle 2, based on the above embodiment, as a preferred implementation mode, notches are provided at both opposite ends of the workbench 1, a support rod 02 is provided on one side of the notch, and a protrusion 03 is provided on the support rod 02 and at a position of the workbench 1 near the notch;

[0048] Correspondingly, a first groove 20 corresponding to the support rod 02 is provided on one side of the folding side baffle 2, and the support rod 02 is located in the first groove 20. A flip handle 21 is fixed on one side of the folding side baffle 2, and the flip handle 21 penetrates the folding side baffle 2 and extends into the first groove 20. The two ends of the flip handle 21 penetrate the two protrusions 03 and extend to one side of the protrusions 03, respectively. One end of the flip handle 21 is bent. That is, the flip handle 21 is fixedly connected to the folding side baffle 2 and is rotatably connected to the protrusions 03. After the folding of the folding side baffles 2 at the opposite ends of the workbench 1, a part of them is located on the workbench 1.

[0049] In order to prevent the circuit breaker placed on the workbench 1 from shifting sideways, based on the above embodiment, as a preferred implementation, a limit plate 22 is further provided on the side of the folding side baffle 2 close to the workbench 1. The limit plate 22 is higher than the table surface of the workbench 1. In actual design, the folding side baffle 2 and the limit plate 22 can be set as an integrated structure. When the folding side baffle 2 is flipped, folded or unfolded, the limit plate 22 can rotate back and forth at the notch on the workbench 1, and the setting of the limit plate 22 will not affect the flipping of the folding side baffle 2.

[0050] After the folding side baffle 2 is unfolded or folded, in order to facilitate the limiting of the circuit breaker on the workbench 1, based on the above embodiment, as a preferred implementation mode, a second groove 23 is further provided on the folding side baffle 2, and a plurality of third grooves 24 are provided on one side of the second groove 23, each third groove 24 is connected to and perpendicular to the second groove 23, and a movable pin 230 is provided in the second groove 23, and both ends of the movable pin 230 respectively pass through the folding side baffle 2 and extend to both sides of the folding side baffle 2, and a limiting pin 2301 is vertically provided on the movable pin 230, and the limiting pin 2301 is located in the corresponding third groove 24. Specifically, two third grooves 24 can be set, one third groove 24 is called gear position No. 1, and the other third groove 24 is called gear position No. 2. Two side walls on the third groove 24 are set through, and the use width of the transfer cart is adjusted according to the size of the circuit breaker to be transported. For example, if a 1000mm circuit breaker needs to be transported, the left and right folding side baffles 2 can be unfolded, and the circuit breaker can be moved to the workbench 1 of the transfer cart. The limit pin 2301 is moved to the third groove 24 of the No. 1 gear position by rotating the movable pin 230, and then it is screwed on and locked; if an 800mm circuit breaker needs to be used, the left and right folding side baffles 2 can be flipped and folded, and the circuit breaker can be moved to the workbench 1 of the transfer cart. The limit pin 2301 is moved to the third groove 24 of the No. 2 gear position by rotating the movable pin 230, and then it is screwed on and locked. Regardless of whether the limiting pin 2301 moves to the third groove 24 of the No. 1 gear position or the limiting pin 2301 moves to the third groove 24 of the No. 2 gear position, the movable pin 230 will extend from the corresponding side of the folding side baffle 2, and then block the circuit breaker chassis vehicle from rolling forward, thereby limiting the circuit breaker. Rotating to different gears can block the rolling wheels of different circuit breakers, preventing the circuit breaker from rolling forward and falling off the transfer trolley.

[0051] In order to further limit the circuit breaker on the workbench 1, based on the above embodiment, as a preferred implementation method, a positioning pin 12 and a hook 13 are also provided on the workbench 1. Specifically, the hook 13 is operated by a hook handle 130. Because the circuit breaker is a component installed in the distribution cabinet to control the on and off of electricity, after the height of the workbench 1 is adjusted to the right position, the circuit breaker is first placed on the workbench 1 of the transfer trolley, the transmission shaft 4 is rotated, and the workbench 1 is adjusted so that the positioning pin 12 of the transfer trolley is coaxial with the positioning hole of the distribution cabinet, and the transfer trolley is pushed so that the positioning pin 12 on the transfer trolley is engaged with the positioning hole of the distribution cabinet, so that the hook 13 on the transfer trolley is connected and locked with the distribution cabinet, and the circuit breaker can be assembled and removed from the distribution cabinet through the transfer trolley.

[0052] The height and width adjustable circuit breaker transport trolley provided in the present application can rotate the transmission shaft with the help of an external rotating handle 64. The transmission shaft drives the gear to rotate, so that the gear in the same guide tube drives the upper and lower racks to move towards each other, and the rack drives the supporting connecting rod to perform a shearing movement, so that the supporting connecting rod can drive the work surface to move upward to the required height. Accordingly, the transmission shaft locking mechanism knob in the one-way locking mechanism of the transmission shaft is rotated to release the one-way locking mechanism of the transmission shaft, and the rotating handle 64 is rotated in the opposite direction to move the work surface downward; then, the working width of the transport trolley is adjusted according to the size of the transported circuit breaker. For example, when transporting a large circuit breaker, the left and right folding side baffles can be unfolded to move the current circuit breaker to the work surface of the transport trolley; when transporting a small circuit breaker, the left and right folding side baffles can be flipped and folded to move the current circuit breaker to the work surface of the transport trolley. The transfer trolley can ensure that the overall height of the transfer trolley is consistent after adjustment, and the work surface of the transfer trolley will not be twisted or deformed during the transfer of circuit breakers. The transfer of multiple types of circuit breakers can be achieved by flipping and folding the side baffles, which can improve the transfer efficiency and transfer safety of circuit breakers and reduce the difficulty of transfer. The transfer trolley can be used for multiple purposes, and can transfer, assemble and remove two types of circuit breakers; it saves space and cost, and each distribution room only needs to be equipped with one transfer trolley; the transfer process is convenient and fast, and the work surface of the transfer trolley can be raised or lowered as a whole, without the need to adjust the supporting connecting rods separately.

[0053] Those skilled in the art will readily appreciate other embodiments of the present application after considering the specification and practicing the application disclosed herein. The present application is intended to cover any variations, uses or adaptations of the present application, which follow the general principles of the present application and include common knowledge or customary technical means in the art disclosed in the present application. The specification and examples are to be regarded as exemplary only, and the true scope of the present application is indicated by the claims.

[0054] It should be understood that the present application is not limited to the precise structure described above and shown in the drawings, and various modifications and changes can be made without departing from its scope. The above-described embodiments of the present application do not constitute a limitation on the scope of protection of the present application.

Claims

1. A circuit breaker transport trolley with adjustable height and width, characterized in that: include: A one-way locking mechanism for a transfer trolley body and a transmission shaft, wherein a universal wheel is installed at the bottom of the transfer trolley body, guide rail tubes are arranged on opposite sides of the transfer trolley body, a bearing seat is arranged on the transfer trolley body, a transmission shaft is installed on the bearing seat, and both ends of the transmission shaft respectively penetrate through the two guide rail tubes and extend to one side of the guide rail tube, both ends of the transmission shaft are provided with gears, the gears are located in the guide rail tube, and one end of the transmission shaft extending to the outside of one side of the guide rail tube is a square shaft, and a baffle is also arranged on the side of the transfer trolley body close to the guide rail tube, and a through hole corresponding to the transmission shaft is arranged on the baffle; The transmission shaft one-way locking mechanism is located between the baffle and the guide rail tube closest to the baffle; The one-way locking mechanism of the transmission shaft includes a locking mechanism gear installed on the square shaft, a fixed groove fixed on the body of the transfer trolley, a stopper, a torsion spring and a knob, a fixed shaft passes through both sides of the fixed groove, the torsion spring and the stopper are both rotatably connected to the fixed shaft, the knob is fixedly connected to the stopper, and the knob passes through the through hole and extends to one side of the through hole, and the structure of the side of the stopper close to the locking mechanism gear corresponds to the tooth structure on the locking mechanism gear; The guide rail tube is provided with a slide groove on both the upper and lower sides, a limit notch is provided on the upper part of one end of the guide rail tube, and a limit groove is provided on the other end, a slider is provided at the limit notch and the limit groove, the slider is located in the slide groove, a rack is fixed on one side of the slider, the rack is slidably installed in the slide groove, the gear is located between the racks, and the gear is meshed with the rack; The slider is provided with a rotating shaft, and the two ends of the rotating shaft are rotatably connected with supporting connecting rods, and the supporting connecting rods on the two sliders on the same side are cross-arranged, and the upper end of the supporting connecting rod is provided with a workbench, and the opposite ends of the workbench are rotatably provided with folding side baffles; Two fixed plates are arranged on the back of the workbench, and a grounding knife rotating handle is rotatably mounted on the fixed plate. A limit block and a spring are arranged on the grounding knife rotating handle, and the spring is located between the limit block and the fixed plate close to the distribution cabinet.

2. The height and width adjustable circuit breaker transport trolley according to claim 1 is characterized in that: The workbench is provided with notches at opposite ends, a support rod is provided on one side of the notch, and a protrusion is provided on the support rod and at a position of the workbench close to the notch; Correspondingly, a first groove corresponding to the support rod is provided on one side of the folding side baffle, and the support rod is located in the first groove. A flip handle is fixed on one side of the folding side baffle, and the flip handle passes through the folding side baffle and extends into the first groove. The two ends of the flip handle respectively pass through the two raised portions and extend to one side of the raised portions respectively, and one end of the flip handle is bent.

3. The height and width adjustable circuit breaker transport trolley according to claim 2 is characterized in that: A limiting plate is also arranged on one side of the folding side baffle plate close to the workbench.

4. The height and width adjustable circuit breaker transport trolley according to claim 3 is characterized in that: A second groove is also provided on the folding side baffle, and a plurality of third grooves are provided on one side of the second groove, each of the third grooves is connected to and perpendicular to the second groove, and a movable pin is provided in the second groove, and both ends of the movable pin respectively pass through the folding side baffle and extend to both sides of the folding side baffle, and a limit pin is vertically provided on the movable pin, and the limit pin is located in the corresponding third groove.

5. The height and width adjustable circuit breaker transport trolley according to any one of claims 1 to 4, characterized in that: The workbench is also provided with positioning pins and hooks.

6. The height and width adjustable circuit breaker transport trolley according to any one of claims 1 to 4, characterized in that: A double-door box is also provided on one side of the transfer trolley body.

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