A centralized power platform maintenance trolley

Abstract

This invention relates to the field of railway maintenance technology and discloses a centralized power platform maintenance trolley, comprising: a cargo bucket assembly including a chassis; a crossbeam assembly detachably mounted at the front and rear ends of the chassis, with a coupler on the outer end face of the crossbeam assembly; a drive wheel assembly movable along the rail, detachably mounted at the left and right ends of the crossbeam assembly; and a battery pack detachably mounted on the chassis, including a battery box with a power interface, containing an energy storage battery and an auxiliary inverter, with the inlet of the energy storage battery connected to the power interface and the outlet of the energy storage battery connected to the auxiliary inverter. The aforementioned centralized power platform maintenance trolley can move along the rail, has high maintenance efficiency, and is equipped with a battery pack that centrally supplies power to small mechanical equipment, eliminating the need for multiple sets of backup equipment, reducing maintenance costs. Furthermore, it has a simple installation structure, is easy to assemble and disassemble, and is highly versatile.

Description

Technical Field

[0001] This invention relates to the field of railway maintenance technology, and more specifically, to a centralized power platform maintenance trolley. Background Technology

[0002] Railway line maintenance is characterized by scattered work locations, remote environments, high labor intensity, and urgent time constraints. Currently, scattered maintenance is mostly done manually by maintenance personnel carrying small mechanical equipment. This requires frequent handling of small mechanical equipment at the construction site, and the equipment has a short operating time. Multiple sets of small mechanical equipment need to be prepared for backup during the construction period, which increases the number of maintenance personnel and results in high maintenance costs.

[0003] In conclusion, how to reduce maintenance costs and improve maintenance efficiency is a problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0004] In view of this, the purpose of the present invention is to provide a centralized power platform maintenance trolley that can move along the railway track, has high maintenance efficiency, and is equipped with a battery pack that provides centralized power to small mechanical equipment, eliminating the need to prepare multiple sets of backup equipment, reducing maintenance costs, and has a simple installation structure, is easy to disassemble and assemble, and has strong versatility.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A centralized power platform maintenance trolley includes:

[0007] Cargo box assembly, including chassis;

[0008] The crossbeam assembly is detachably mounted at the front and rear ends of the chassis, and the outer end face of the crossbeam assembly is provided with a vehicle coupler;

[0009] A drive wheel assembly that can move along the rails is detachably mounted at the left and right ends of the crossbeam assembly;

[0010] The battery pack is detachably mounted on the chassis and includes a battery box with a power interface. The battery box contains an energy storage battery and an auxiliary inverter. The inlet of the energy storage battery is connected to the power interface, and the outlet of the energy storage battery is connected to the auxiliary inverter.

[0011] Preferably, the chassis includes at least one base plate and a U-shaped connecting pipe connecting two adjacent base plates, with the vertical connecting pipes at both ends of the U-shaped connecting pipe inserted into the connecting holes of the base plate.

[0012] Preferably, the outer edge of the chassis is provided with a detachable guardrail assembly, the bottom of which is inserted into the mounting hole of the base plate, and the bottom of the guardrail assembly is provided with a quick-release latch.

[0013] Preferably, the size of the connecting hole is the same as the size of the mounting hole.

[0014] Preferably, the drive wheel assembly includes a drive wheel and a wheel fork seat with a stop, the drive wheel is hinged in the wheel fork seat, and the wheel fork seat is engaged in the limiting groove of the crossbeam assembly.

[0015] Preferably, the locking fork passes sequentially through the connecting hole of the chassis and the connecting hole of the crossbeam assembly, and a self-locking pin is provided between the crossbeam assembly and the locking fork, the self-locking pin being non-parallel to the locking fork.

[0016] Preferably, the locking fork includes a locking fork plate and at least one locking fork pin, the locking fork pin being vertically disposed on the locking fork plate, and the outer periphery of the locking fork pin having a through limiting hole.

[0017] Preferably, the self-locking pin includes a locking pin, a locking tongue, and a locking shaft that hinges the locking pin and the locking tongue. A spring is sleeved on the end of the locking pin that is away from the locking shaft. One end of the spring is connected to the mounting plate at the end of the locking pin, and the other end abuts against the side wall of the crossbeam assembly.

[0018] When using the centralized power platform maintenance trolley provided by this invention, the first step is to connect and fix the cargo bucket assembly, the crossbeam assembly, and the drive wheel assembly, and then install the battery pack on the chassis to complete the assembly of the centralized power platform maintenance trolley. Next, small mechanical equipment required for on-site construction is placed on the chassis, and the centralized power platform maintenance trolley is driven to move along the rails to the location to be repaired. Repair and maintenance are carried out using the small mechanical equipment. When the small mechanical equipment is unable to continue operating, an auxiliary inverter can be connected to provide centralized power to all equipment through the battery pack.

[0019] Among them, the cargo box assembly, crossbeam assembly, drive wheel assembly and battery pack are all detachable, with simple installation structure, easy disassembly and assembly, strong versatility, and space-saving when stored;

[0020] The drive wheel assembly can move along the rails, adapting to on-site maintenance needs and enabling convenient transfer of small mechanical equipment. Compared with manual handling of small mechanical equipment, it reduces labor intensity and improves maintenance efficiency.

[0021] The battery pack contains energy storage batteries, which can provide centralized power to small mechanical equipment, greatly improving the endurance of each small mechanical device, effectively reducing the number of backup devices, and lowering the personnel and equipment costs for maintenance.

[0022] In addition, the centralized power platform maintenance trolley can be connected to multiple vehicles via front and rear couplers, making it convenient to use. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0024] Figure 1 A schematic diagram of a specific embodiment of the centralized power platform maintenance trolley provided by the present invention;

[0025] Figure 2 This is a schematic diagram of the chassis structure;

[0026] Figure 3 This is a structural schematic diagram of the guardrail assembly;

[0027] Figure 4 This is a structural schematic diagram of the beam assembly;

[0028] Figure 5 This is a structural schematic diagram of the beam assembly in another direction;

[0029] Figure 6 This is a schematic diagram of the drive wheel assembly.

[0030] Figure 7 This is a schematic diagram of the battery pack structure;

[0031] Figure 8 This is a schematic diagram of the locking fork structure;

[0032] Figure 9 This is a schematic diagram of the self-locking pin in the locked state;

[0033] Figure 10 This is a schematic diagram of the self-locking pin in the unlocked state;

[0034] Figure 11 This is a schematic diagram of the chassis and crossbeam assembly.

[0035] Figure 12 A schematic diagram of the structure for attaching the maintenance trolley to the centralized power platform;

[0036] Figure 13 This is a schematic diagram showing the storage of the maintenance trolley for the centralized power platform.

[0037] Figures 1-13 middle:

[0038] 01 is a self-locking pin, 02 is a connecting plate, 03 is a lighting module, 04 is a hydraulic pump station module, 05 is an air compressor module, and 06 is a construction tool;

[0039] 10 is the chassis, 11 is the base plate, 111 is the connecting hole, and 12 is the U-shaped connecting pipe;

[0040] 20 is a guardrail component, 21 is a U-shaped tube, 22 is a straight tube, and 23 is a quick-release latch;

[0041] 30 is the crossbeam assembly, 31 is the box beam, 311 is the connecting hole, 312 is the crossbeam locking hole, 32 is the drive wheel mounting seat, 321 is the limiting groove, 322 is the locking hole, 33 is the coupler, and 331 is the connecting pin hole.

[0042] 40 is the drive wheel assembly, 41 is the wheel fork seat, 411 is the stop, and 42 is the drive wheel;

[0043] 50 is the battery pack, 51 is the battery box, 511 is the support leg, 512 is the power interface, 513 is the box cover, 514 is the partition, 515 is the handle, 52 is the energy storage battery, 53 is the auxiliary inverter, and 54 is the vehicle controller.

[0044] 6 is the locking fork, 61 is the locking fork plate, 62 is the locking fork pin, and 621 is the limiting hole;

[0045] 7 is the self-locking pin, 71 is the locking pin, 72 is the locking tongue, 73 is the locking shaft, 74 is the spring, and 75 is the washer. Detailed Implementation

[0046] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0047] The core of this invention is to provide a centralized power platform maintenance trolley that can move along the railway track, has high maintenance efficiency, and is equipped with a battery pack that provides centralized power to small mechanical equipment. This eliminates the need to prepare multiple sets of backup equipment, reduces maintenance costs, and has a simple installation structure that is easy to assemble and disassemble and is highly versatile.

[0048] The centralized power platform maintenance trolley provided by this invention includes:

[0049] Cargo box assembly, including chassis 10;

[0050] The crossbeam assembly 30 is detachably mounted on the front and rear ends of the chassis 10, and the outer end face of the crossbeam assembly 30 is provided with a coupler 33;

[0051] The drive wheel assembly 40, which can move along the rails, is detachably mounted at the left and right ends of the crossbeam assembly 30;

[0052] The battery pack 50 is detachably mounted on the chassis 10 and includes a battery box 51 with a power interface 512. The battery box 51 contains an energy storage battery 52 and an auxiliary inverter 53. The inlet of the energy storage battery 52 is connected to the power interface 512, and the outlet of the energy storage battery 52 is connected to the auxiliary inverter 53.

[0053] The cargo bin assembly is used to load battery pack 50, lighting module 03 for nighttime construction, and small mechanical equipment such as hydraulic pump station module 04, air compressor module 05 and construction tools 06 required for maintenance. Considering that the types and quantities of mechanical equipment required for each construction and maintenance may vary, the cargo area of ​​the cargo bin assembly can be set to be adjustable to avoid wasting installation space.

[0054] For example, please refer to Figure 1 The chassis 10 includes at least one base plate 11 and a U-shaped connecting pipe 12 connecting two adjacent base plates 11. The vertical connecting pipes at both ends of the U-shaped connecting pipe 12 are inserted into the connecting holes 111 of the base plate 11.

[0055] The chassis 10 is assembled from multiple base plates 11. Compared with replacing chassis 10 of different sizes, it is not only cheaper, but also reduces the floor space occupied by the chassis 10 during storage and makes it easier to store.

[0056] Furthermore, the base plate 11 can be provided with an array of several connecting holes 111, the diameter of which is the same as the outer diameter of the vertical connecting pipe of the U-shaped connecting pipe 12.

[0057] By changing the position of the connecting hole 111 into which the U-shaped connecting pipe 12 is inserted, the overlapping area of ​​two adjacent bottom plates 11 can be adjusted, thereby obtaining chassis 10 with different cargo areas. This not only facilitates the splicing of the bottom plates 11, but also reduces weight.

[0058] To prevent the mechanical equipment from falling off due to bumps or shaking when the maintenance trolley moves, preferably, a detachable guardrail assembly 20 can be provided on the outer edge of the chassis 10. The bottom of the guardrail assembly 20 is inserted into the mounting hole of the base plate 11, and the bottom of the guardrail assembly 20 is provided with a quick-release latch 23.

[0059] Please refer to Figure 3 The guardrail assembly 20 includes a U-shaped tube 21 and a straight tube 22 for supporting the U-shaped tube 21. The straight tube 22 is connected to the horizontal tube of the U-shaped tube 21 by insertion. Both the ends of the U-shaped tube 21 and the straight tube 22 are provided with quick-release buckles 23.

[0060] When installing the guardrail assembly 20, first insert the straight tube 22 into the U-shaped tube 21, then remove the quick-release buckle 23, insert the U-shaped tube 21 and the straight tube 22 into the mounting hole of the base plate 11, and make them protrude from the bottom of the base plate 11. Finally, install the quick-release buckle 23 to prevent the guardrail assembly 20 from moving down.

[0061] To simplify the structure of the base plate 11, the shape and size of the mounting holes are usually set to be exactly the same as the shape and size of the connecting holes 111, so the two can be used interchangeably.

[0062] The crossbeam assembly 30 is detachably connected to the chassis 10, specifically by means of fastening bolts, connecting pins and other connecting parts.

[0063] The crossbeam assembly 30 is located at the front and rear ends of the chassis 10 and is used to connect the drive wheel assembly 40 and the chassis 10. It has a coupler 33 on its outer end face to facilitate the multi-vehicle coupling of the trolley. The specific number, structure, shape and spacing of the coupler 33 are determined with reference to existing technology according to the actual production needs.

[0064] Please refer to Figure 12 A coupler 33 is provided at 1 / 2 width of the crossbeam assembly 30, and a connecting pin hole 331 is provided on the coupler 33; the couplers 33 of the front and rear maintenance trolleys are connected by a connecting plate 02 of a certain length, and the coupler 33 and the connecting plate 02 are connected by a self-locking pin 01 to meet the needs when the track turns.

[0065] It should be noted that the coupler 33 is set perpendicular to the outer end face of the crossbeam assembly 30. At this time, the tension direction of the coupler 33 is parallel to the length direction of the maintenance trolley. This can prevent the maintenance trolley from deviating from the extension direction of the rail under the tension of the coupler 33 of the front and rear maintenance trolleys, and ensure the smooth movement of the maintenance trolley along the rail.

[0066] The drive wheel assembly 40 and the crossbeam assembly 30 are detachably connected. The two can be connected by common detachable connection methods such as snap-fit ​​connection, bolt connection, and pin connection. The drive wheel assembly 40 can move along the rails, which is more labor-saving and efficient than manually carrying and transferring mechanical equipment.

[0067] In order to enable the drive wheel assembly 40 to move along the rail, the drive wheel assembly 40 is located at the left and right ends of the crossbeam assembly 30, and the wheel spacing of the two drive wheel assemblies 40 is the same as that of the rail.

[0068] The structure, shape, and size of the drive wheel 42 of the drive wheel assembly 40 are determined based on the structure, shape, and size of the rails in actual production, with reference to the wheels of existing rail locomotives, and will not be elaborated here.

[0069] The drive wheel assembly 40 can be configured as a purely mechanical structure, which can be manually pushed to move along the rail; alternatively, a wheel-side motor with braking function can be selected as the drive wheel 42, and the drive wheel assembly 40 can be electrically connected to the energy storage battery 52 of the battery pack 50. Electric drive is more time-saving and labor-saving than manual push.

[0070] Considering that there may be no available power at the maintenance location and that the small mechanical equipment required for maintenance has a short battery life, the maintenance trolley is equipped with a battery pack 50, which is used to provide centralized power to the various mechanical equipment required for maintenance.

[0071] To prevent the energy storage battery 52 from directly contacting external rain and dust, the energy storage battery 52 and the auxiliary inverter 53 are usually placed inside the battery box 51, which is equipped with a power interface 512.

[0072] The energy storage battery 52 is electrically connected to the power interface 512 on the surface of the battery box 51. It can be connected to an external power source and charged through the power interface 512, and discharged when the maintenance equipment needs to be maintained.

[0073] The auxiliary inverter 53 is connected to the output terminal of the energy storage battery 52 and is used to convert the output voltage of the energy storage battery 52 into the working voltage of the maintenance equipment.

[0074] In addition, when the drive wheel assembly 40 is electrically driven, the battery pack 50 may also contain a vehicle controller 54 to assist remote equipment in controlling the speed of the drive wheel assembly 40.

[0075] The type, size, and capacity of the energy storage battery 52, the type and model of the auxiliary inverter 53, and the type and model of the vehicle controller 54 are determined based on factors such as the total energy consumption and average maintenance time of the maintenance equipment in actual production.

[0076] The structure, shape, and size of the battery box 51 need to be determined based on the shape and size of the electronic components such as the energy storage battery 52 placed inside it.

[0077] Please refer to Figure 7 The top of the battery box 51 is provided with a flip-up or sliding cover 513 for the replacement and maintenance of internal components. The surface of the battery box 51 is provided with at least one handle 515 for moving the battery box 51.

[0078] The battery box 51 is equipped with several partitions 514. The partitions 514 can divide the interior of the battery box 51 into different areas so that the energy storage battery 52 and the auxiliary inverter 53 can be placed separately. The layout is beautiful and neat, and it is also conducive to fixing the position of each component.

[0079] To prevent the battery pack 50 from sliding relative to the chassis 10 and affecting the stability of the electrical connection between the energy storage battery 52 and the maintenance equipment, the bottom of the battery box 51 of the battery pack 50 is provided with at least one support leg 511. The support leg 511 can be inserted into the connection hole 111 of the base plate 11 to fix the position of the battery pack 50 on the chassis 10.

[0080] In use, first connect and fix the cargo bucket assembly and crossbeam assembly 30, the crossbeam assembly 30 and the drive wheel assembly 40, and install the battery pack 50 on the chassis 10 to complete the assembly of the centralized power platform maintenance trolley; then, place the small mechanical equipment required for on-site construction on the chassis 10, and drive the centralized power platform maintenance trolley to move along the rails to the location to be repaired; use the small mechanical equipment for repair and maintenance. When the small mechanical equipment is difficult to continue operating, the auxiliary inverter 53 can be connected to provide centralized power to each piece of equipment through the battery pack 50.

[0081] In this embodiment, the cargo bin assembly, crossbeam assembly 30, drive wheel assembly 40 and battery pack 50 are all detachably connected, with a simple installation structure, easy disassembly and assembly, strong versatility, and space-saving storage.

[0082] The drive wheel assembly 40 can move along the rails, adapting to on-site maintenance needs and enabling convenient transfer of small mechanical equipment. Compared with manual handling of small mechanical equipment, it reduces labor intensity and improves maintenance efficiency.

[0083] The battery pack 50 contains an energy storage battery 52, which can provide centralized power to small mechanical equipment, greatly improve the endurance of each small mechanical device, effectively reduce the number of backup devices, and reduce the personnel and equipment costs for maintenance.

[0084] In addition, the centralized power platform maintenance trolley can be connected to multiple vehicles via front and rear couplers, making it convenient to use.

[0085] Based on the above embodiments, the connection method of the drive wheel assembly 40 and the crossbeam assembly 30 is defined. The drive wheel assembly 40 includes a drive wheel 42 and a wheel fork seat 41 with a stop 411. The drive wheel 42 is hinged in the wheel fork seat 41, and the wheel fork seat 41 is engaged in the limiting groove 321 of the drive wheel mounting seat 32 of the crossbeam assembly 30.

[0086] Therefore, the drive wheel assembly 40 and the crossbeam assembly 30 are snap-fitted together, which is simple in structure and easy to disassemble and assemble.

[0087] Preferably, the drive wheel mounting base 32 may be provided with a locking hole 322, which is used to lock the wheel fork seat 41 and limit the sliding of the wheel fork seat 41 relative to the limiting groove 321 during operation.

[0088] Based on the above embodiments, the connection method between the crossbeam assembly 30 and the chassis 10 is defined. The locking fork 6 passes through the connection hole 111 of the chassis 10 and the connection hole 311 of the crossbeam assembly 30 in sequence. A self-locking pin 7 is provided between the crossbeam assembly 30 and the locking fork 6. The self-locking pin 7 is not parallel to the locking fork 6.

[0089] The locking fork 6 is used to connect the chassis 10 and the crossbeam assembly 30, and the self-locking pin 7 is used to lock and fix the axial position of the locking fork 6 and prevent it from coming out of the connection hole 111 of the chassis 10 or the connection hole 311 of the crossbeam assembly 30.

[0090] In order to connect the chassis 10 and the crossbeam assembly 30, the locking fork 6 includes a vertical connecting part that extends vertically through the chassis 10 and is inserted into or through the crossbeam assembly 30, and the vertical connecting part is provided with a through hole for the self-locking pin 7 to pass through.

[0091] Please refer to Figure 8 The locking fork 6 includes a locking fork plate 61 and at least one locking fork pin 62. The locking fork pin 62 is vertically disposed on the locking fork plate 61, and the outer periphery of the locking fork pin 62 is provided with a through limiting hole 621.

[0092] Among them, the locking fork pin 62 serves as a vertical connecting part, used to vertically penetrate the chassis 10 and insert into or penetrate the crossbeam assembly 30, and is provided with a through limiting hole 621 so that the self-locking pin 7 can pass through.

[0093] The locking plate 61 is located on the top of the locking pin 62 and can work with the self-locking pin 7 to axially limit the locking pin 62 and prevent the locking pin 62 from moving upward along the axial direction.

[0094] In addition, multiple locking pins 62 may be provided on the locking fork plate 61. Integrating multiple locking pins 62 enhances the connection strength between the locking fork 6 and the chassis 10 and the crossbeam assembly 30. Preferably, the locking pins 62 are distributed in an array on the locking fork plate 61 so that the force on the locking fork 6 is relatively uniform.

[0095] For example, in a specific embodiment, please refer to Figure 4 , Figure 5 and Figure 8 The locking plate 61 of the locking fork 6 is arrayed with 4 locking fork pins 62, and the limiting holes 621 of the locking fork pins 62 arranged in the same row are located on the same axis.

[0096] The box beam 31 of the crossbeam assembly 30 is a rectangular tube structure. The upper and lower end faces of the box beam 31 are provided with through connecting holes 311. The front and rear end faces of the box beam 31 are provided with four through crossbeam locking holes 312. Each locking fork 6 corresponds to two crossbeam locking holes 312.

[0097] The self-locking pin 7 is inserted into the crossbeam assembly 30 and the locking fork 6. In the locked state, it has an L-shaped structure. The L-shaped structure can be achieved by hinged rotation of the main rod and the end rod, or by hooking the spring at the end of the main rod to the hook point on the surface of the crossbeam assembly 30.

[0098] Please refer to Figure 8 The self-locking pin 7 includes a locking pin 71, a locking tongue 72, and a locking shaft 73 that hinges the locking pin 71 and the locking tongue 72. A spring 74 is sleeved on the end of the locking pin 71 that is relatively far away from the locking shaft 73. One end of the spring 74 is connected to the mounting plate at the end of the locking pin 71, and the other end abuts against the side wall of the crossbeam assembly 30.

[0099] During installation, the self-locking pin 7 is inserted into the crossbeam assembly 30, passing sequentially through the crossbeam locking hole 312 on one side of the crossbeam assembly 30, the limiting hole 621 of the locking fork 6, and the crossbeam locking hole 312 on the other side of the crossbeam assembly 30. This further compresses the spring 74, causing the locking tongue 72 to automatically drop, thus forming a self-locking state. Figure 9 As shown;

[0100] Conversely, recompressing the spring 74 straightens the latch 72, as... Figure 10 As shown, the self-locking pin 7 can be removed.

[0101] To reduce the impact of the spring 74 on the surface of the crossbeam assembly 40, preferably, a washer 75 can be provided on the outer sleeve of the locking pin 71, with the washer 75 located between the spring 74 and the surface of the crossbeam assembly 40.

[0102] In this embodiment, the chassis 10 and the crossbeam assembly 30 are connected by the locking fork 6, and the locking fork 6 is locked by the self-locking function of the self-locking pin 7. Compared with bolt connection, installation and disassembly are more convenient.

[0103] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0104] The centralized power platform maintenance trolley provided by this invention has been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this invention. The descriptions of the embodiments above are merely for the purpose of helping to understand the method and core ideas of this invention. It should be noted that those skilled in the art can make various improvements and modifications to this invention without departing from its principles, and these improvements and modifications also fall within the protection scope of the claims of this invention.

Claims

1. A centralized power platform maintenance trolley, characterized in that, include: The cargo box assembly includes the chassis (10). The crossbeam assembly (30) is detachably disposed at the front and rear ends of the chassis (10), and the outer end face of the crossbeam assembly (30) is provided with a coupler (33). A drive wheel assembly (40) that can move along the rails is detachably located at the left and right ends of the crossbeam assembly (30); The battery pack (50) is detachably mounted on the chassis (10) and includes a battery box (51) with a power interface (512). The battery box (51) contains an energy storage battery (52) and an auxiliary inverter (53). The inlet of the energy storage battery (52) is connected to the power interface (512), and the outlet of the energy storage battery (52) is connected to the auxiliary inverter (53). The locking fork (6) passes through the connecting hole (111) of the chassis (10) and the connecting hole (311) of the crossbeam assembly (30) in sequence. A self-locking pin (7) is provided between the crossbeam assembly (30) and the locking fork (6). The self-locking pin (7) is not parallel to the locking fork (6). The locking fork (6) includes a locking fork plate (61) and at least one locking fork pin (62). The locking fork pin (62) is vertically disposed on the locking fork plate (61), and the outer periphery of the locking fork pin (62) is provided with a through limiting hole (621). The self-locking pin (7) includes a locking pin (71), a locking tongue (72), and a locking shaft (73) that hinges the locking pin (71) and the locking tongue (72). A spring (74) and a washer (75) are fitted on one end of the locking pin (71) that is relatively far away from the locking shaft (73). One end of the spring (74) is connected to the mounting plate at the end of the locking pin (71), and the other end abuts against the side wall of the crossbeam assembly (30) so that the spring (74) is compressed to make the locking tongue (72) fall down automatically and form a self-locking mechanism. The washer (75) is located between the spring (74) and the surface of the crossbeam assembly (30). The spring (74) presses the washer (75) against the surface of the crossbeam assembly (30). During installation, the self-locking pin (7) is inserted into the crossbeam assembly (30), so that the self-locking pin (7) passes through the crossbeam lock hole (312) on one side of the crossbeam assembly (30), the limiting hole (621) of the lock fork (6), and the crossbeam lock hole (312) on the other side of the crossbeam assembly (30) in sequence, so as to compress the spring (74) and cause the locking tongue (72) to fall down automatically and form a self-lock.

2. The centralized power platform maintenance trolley according to claim 1, characterized in that, The chassis (10) includes at least one base plate (11) and a U-shaped connecting pipe (12) connecting two adjacent base plates (11). The vertical connecting pipes at both ends of the U-shaped connecting pipe (12) are inserted into the connecting holes (111) of the base plate (11).

3. The centralized power platform maintenance trolley according to claim 2, characterized in that, The outer edge of the chassis (10) is provided with a detachable guardrail assembly (20), the bottom of which is inserted into the mounting hole of the base plate (11), and the bottom of the guardrail assembly (20) is provided with a quick-release buckle (23).

4. The centralized power platform maintenance trolley according to claim 3, characterized in that, The size of the connecting hole (111) is the same as the size of the mounting hole.

5. The centralized power platform maintenance trolley according to any one of claims 1-4, characterized in that, The drive wheel assembly (40) includes a drive wheel (42) and a wheel fork seat (41) with a stop (411). The drive wheel (42) is hinged in the wheel fork seat (41), and the wheel fork seat (41) is engaged in the limiting groove (321) of the crossbeam assembly (30).

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