Transport vehicle

Abstract

The utility model discloses a transport vehicle and relates to the technical field of transport devices. The transport vehicle comprises a transport body, an emergency braking assembly, a manual transport assembly and a manual braking releasing assembly. The emergency braking assembly is used for braking wheels of the transportation body and comprises a band-type brake shifting rod. The manual conveying assembly comprises a first hand wheel and a gearbox, the first hand wheel is in transmission connection with the input end of the gearbox, and the output end of the gearbox is in transmission connection with the axle. The manual brake releasing assembly comprises a second hand wheel, a transmission flexible shaft and a brake connecting rod, the second hand wheel is in transmission connection with the first end of the transmission flexible shaft, the second end of the transmission flexible shaft is connected with the brake connecting rod, and the brake connecting rod is used for pushing the band-type brake shifting rod to move from the braking state to the non-braking state. According to the utility model, the automatic brake state of the transport vehicle under extreme conditions can be relieved, and the transmission torque of the transport vehicle is converted into the torque of the steering wheel within a manpower range, so that a stable and reliable emergency control means is provided for the transportation of reactor heavy tool equipment.

Description

Technical Field

[0001] The utility model relates to the technical field of transport devices, and more specifically, to a transport vehicle. Background Art

[0002] The heavy-duty transport flatbed truck for the gantry of the reactor building of a nuclear power plant (hereinafter referred to as the transport truck) is a special equipment installed on the gantry platform outside the equipment hatch of the reactor building of each unit. It is mainly used to transport heavy core main equipment such as reactors, evaporators, pressurizers, main cooling water pumps and their large special tools during the installation stage of nuclear power plant projects, and to transport large special tools for opening and closing the top cover of the reactor pressure vessel from the periphery of the power plant through the nuclear island equipment hatch into the reactor building during the unit operation stage. The transport truck is a key support equipment for the installation and operation and maintenance of nuclear power plant projects.

[0003] However, due to design defects, the transport vehicle only has one operation mode, which is electric remote control. In actual use, this electric remote operation mode frequently fails due to unstable system power supply, and cannot ensure the safe transportation of reactor-specific tools into the nuclear island plant. This not only makes it impossible to open the reactor cover in time, but also restricts the smooth progress of the key path of the unit overhaul, which will cause huge losses in power generation efficiency. In addition, the transport vehicle will automatically activate the brake locking protection device in the event of power failure. Although this design is to prevent heavy equipment from causing secondary actions and chain accidents, the self-locking state of the brake pads will become an obstacle to manual intervention during the emergency intervention stage.

[0004] Therefore, how to ensure that a single person can still control the transport vehicle and transport the tools on the transport vehicle to the target area in extreme situations such as system power failure or air loss has become a technical problem that needs to be urgently solved by technical personnel in this field. Utility Model Content

[0005] In view of this, an object of the present invention is to provide a transport vehicle, so that in extreme situations such as power failure or air failure of the system, a single person can still control the transport vehicle and transport the tools on the transport vehicle to the target area.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A transport vehicle, comprising:

[0008] The transport body comprises a vehicle body, wheels and a driving assembly, wherein the wheels are rotatably arranged at the bottom of the vehicle body through axles, and the driving assembly is arranged on the vehicle body to drive the wheels to rotate;

[0009] An emergency brake assembly, used for braking the wheel, and comprising a brake lever for controlling the braking state;

[0010] A manual transportation component, including a first handwheel and a gearbox, the first handwheel is drivingly connected to the input end of the gearbox, the output end of the gearbox is drivingly connected to the axle, and the gearbox is arranged on the vehicle body;

[0011] A manual brake release component, including a second handwheel, a transmission flexible shaft and a brake connecting rod, the second handwheel is arranged on the vehicle body and is drivingly connected to the first end of the transmission flexible shaft for driving the second end of the transmission flexible shaft to move, the second end of the transmission flexible shaft is connected to the brake connecting rod, and the brake connecting rod is used to push the brake lever to switch from the braking state to the non-braking state.

[0012] Optionally, in the above-mentioned transport vehicle, an electric control handle is further included, and the electric control handle has a working mode and a self-locking mode;

[0013] When the electric control handle is in the working mode, the electric control handle is used to control the emergency braking component and the driving component to act; when the electric control handle is in the self-locking mode, the electric control handle disconnects the control of the emergency braking component and the driving component.

[0014] Optionally, in the above-mentioned transport vehicle, a self-locking keyhole is arranged on the electric control handle;

[0015] When the self-locking key is not inserted into the self-locking keyhole, the electric control handle is in the working mode; when the self-locking key is inserted into the self-locking keyhole, the electric control handle is in the self-locking mode.

[0016] Optionally, in the above-mentioned transport vehicle, a transmission nut is arranged at the first end of the transmission flexible shaft, the transmission flexible shaft is in threaded transmission cooperation with the transmission nut, and the transmission nut is connected to the second handwheel and rotates synchronously; or,

[0017] The first end of the transmission flexible shaft is wound around the second handwheel.

[0018] Optionally, in the above-mentioned transport vehicle, the manual brake release component includes a fixing frame, the fixing frame is arranged on the vehicle body and is provided with an installation hole, and the axis of the installation hole is parallel to the moving direction of the brake connecting rod;

[0019] A fixing sleeve is fixedly arranged outside the second end of the transmission flexible shaft, and the fixing sleeve is slidably arranged through the installation hole.

[0020] Optionally, in the above-mentioned transport vehicle, a limiting boss is arranged at the first end of the fixing sleeve, and an installation thread is arranged on the outer wall of the second end, and the installation thread is in threaded cooperation with a limiting nut, and the limiting boss and the limiting nut are used to respectively abut and limit the two ends of the fixing frame.

[0021] Optionally, in the above-mentioned transport vehicle, a first stopper and a second stopper are provided on the brake connecting rod, and a movable space for the brake lever to pass through is formed between the first stopper and the second stopper;

[0022] The first stopper is used to push the brake lever to switch from a non-braking state to a braking state, and the second stopper is used to push the brake lever to switch from a braking state to a non-braking state.

[0023] Optionally, in the above-mentioned transport vehicle, a slide groove is provided on the vehicle body, the slide groove is for the brake connecting rod to slide, and the slide groove is arranged along the extension direction of the brake connecting rod.

[0024] Optionally, in the above-mentioned transport vehicle, the first hand wheel is detachably connected to the gear box.

[0025] Optionally, in the above-mentioned transport vehicle, a lifting column is provided on the vehicle body, the manual transport component includes a mounting frame, the mounting frame is connected to the lifting column, and the gear box is arranged on the mounting frame.

[0026] The transport vehicle provided by the utility model comprises a transport body, an emergency brake assembly, a manual transport assembly and a manual brake release assembly. The transport body comprises a vehicle body, wheels and a drive assembly. The wheels are rotatably arranged at the bottom of the vehicle body through an axle. The drive assembly is arranged on the vehicle body and is used to drive the wheels to rotate. The emergency brake assembly is used to brake the wheels, and it comprises a brake lever for controlling the braking state. By toggling the brake lever, the emergency brake assembly can be switched between the braking state and the non-braking state. The manual transport assembly comprises a first hand wheel and a gear box. The first hand wheel is connected to the input end of the gear box in a transmission manner. The output end of the gear box is connected to the axle in a transmission manner. The gear box is arranged on the vehicle body. The manual transport assembly is used for manually operating the first hand wheel to provide power for the axle, so as to realize the manpower movement of the transport vehicle in the case of power failure.

[0027] The manual brake release assembly includes a second hand wheel, a transmission flexible shaft and a brake connecting rod. The second hand wheel is arranged on the vehicle body and is transmission-connected to the first end of the transmission flexible shaft for driving the second end of the transmission flexible shaft to move. The second end of the transmission flexible shaft is connected to the brake connecting rod. The brake connecting rod is used to push the brake lever from a braking state to a non-braking state, so as to achieve the purpose of manually operating the emergency brake assembly to release the braking state in a power-off state.

[0028] When a power failure occurs, the emergency braking component is in the braking state. At this time, the second handwheel can be manually rotated, so that the transmission flexible shaft pulls the brake connecting rod to move. The movement of the brake connecting rod can move the brake lever from the braking state to the non-braking state, realizing the release of the braking state of the emergency braking component. At this time, manually rotating the first handwheel can provide power to the axle and realize the manual movement of the transport vehicle.

[0029] Compared with the prior art, the transport vehicle provided by the utility model relieves the automatic braking state of the transport vehicle in extreme situations by adding a manual braking release component and a manual transport component, and can convert the transmission torque of the transport vehicle into the steering wheel torque within the range of human power, providing a stable and reliable emergency control means for the transportation of reactor heavy tool equipment. Brief Description of the Drawings

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0031] Figure 1 Structural schematic of the transport vehicle disclosed in the embodiment of the present utility model Figure 1 ;

[0032] Figure 2 Structural schematic of the transport vehicle disclosed in the embodiment of the present utility model Figure 2 ;

[0033] Figure 3 Structural schematic of the transport vehicle disclosed in the embodiment of the present utility model Figure 3 ;

[0034] Figure 4 Structural schematic diagram of the manual transport component on the transport main body disclosed in the embodiment of the present utility model;

[0035] Figure 5 Structural schematic diagram of the manual braking release component on the transport main body disclosed in the embodiment of the present utility model;

[0036] Figure 6 Simplified transmission schematic of the manual braking release component disclosed in the embodiment of the present utility model Figure 1 ;

[0037] Figure 7 Simplified transmission schematic of the manual braking release component disclosed in the embodiment of the present utility model Figure 2 ;

[0038] Figure 8 Schematic transmission diagram of the manual brake release assembly disclosed in the embodiment of the present utility model Figure 3 ;

[0039] Figure 9 Schematic transmission diagram of the manual brake release assembly disclosed in the embodiment of the present utility model Figure 4 ;

[0040] Figure 10 Schematic transmission diagram of the manual brake release assembly disclosed in the embodiment of the present utility model Figure 5 ;

[0041] Figure 11 Schematic transmission diagram of the manual brake release assembly disclosed in the embodiment of the present utility model Figure 6 ;

[0042] Figure 12 Schematic structural diagram of the fixed frame disclosed in the embodiment of the present utility model;

[0043] Figure 13 Schematic structural diagram of the electric control handle disclosed in the embodiment of the present utility model.

[0044] Among them, 100 is the vehicle body, 101 is the lifting column, 110 is the axle, and 120 is the wheel;

[0045] 200 is the emergency brake assembly, and 210 is the brake lever;

[0046] 300 is the first handwheel, 310 is the gearbox, and 320 is the mounting bracket;

[0047] 400 is the second handwheel, 410 is the transmission flexible shaft, 411 is the fixed sleeve, 412 is the limit nut, 420 is the fixed frame, 421 is the mounting hole, 430 is the brake connecting rod, 431 is the first stop block, 432 is the second stop block, and 433 is the switching groove;

[0048] 500 is the electric control handle, 510 is the self-locking keyhole, and 520 is the control button. Specific implementation mode

[0049] The core of the present utility model lies in disclosing a transport vehicle, so that in extreme situations such as power failure and air loss of the system, a single person can still control the transport vehicle and transport the tools on the transport vehicle into the target area.

[0050] Hereinafter, embodiments will be described with reference to the accompanying drawings. In addition, the embodiments shown below do not limit the utility model content described in the claims in any way. Further, all the contents of the configurations shown in the following embodiments are not necessarily essential for the solution of the utility model described in the claims. It should be noted that for ease of description, only parts related to the utility model are shown in the drawings. Without conflict, the embodiments and features in the embodiments of the present utility model can be combined with each other.

[0051] Combined with Figures 1 - 12 , the transport vehicle disclosed in the present utility model includes a transport main body, an emergency braking assembly 200, a manual transport assembly, and a manual braking release assembly. The transport main body includes a vehicle body 100, wheels 120, and a drive assembly. The wheels 120 are rotatably provided at the bottom of the vehicle body 100 through an axle 110. The drive assembly is provided on the vehicle body 100 and is used to drive the wheels 120 to rotate. The emergency braking assembly 200 is used to brake the wheels 120, and it includes a brake lever 210 for controlling the braking state. By toggling the brake lever 210, the emergency braking assembly 200 can be switched between the braking state and the non-braking state. The manual transport assembly includes a first handwheel 300 and a gearbox 310. The first handwheel 300 is in transmission connection with the input end of the gearbox 310. The output end of the gearbox 310 is in transmission connection with the axle 110. The gearbox 310 is provided on the vehicle body 100. The manual transport assembly is used for manual operation of the first handwheel 300 by a person to provide power for the axle 110, so as to realize the manual movement of the transport vehicle in the case of power failure.

[0052] Specifically, the gearbox 310 is a high transmission ratio conversion gearbox, which can be in transmission connection with the axle 110 through a spline structure. The gearbox 310 can amplify the torque and reduce the rotational speed at the same time, so as to achieve the purpose of manually transporting large tools.

[0053] The manual braking release assembly includes a second handwheel 400, a transmission flexible shaft 410, and a brake connecting rod 430. The second handwheel 400 is provided on the vehicle body 100 and is in transmission connection with the first end of the transmission flexible shaft 410, and is used to drive the second end of the transmission flexible shaft 410 to move. The second end of the transmission flexible shaft 410 is connected to the brake connecting rod 430. The brake connecting rod 430 is used to push the brake lever 210 to move from the braking state to the non-braking state, so as to achieve the purpose of manually operating the emergency braking assembly 200 to release the braking state in the power-off state.

[0054] When a power failure occurs, the emergency braking assembly 200 is in a braking state. At this time, the second handwheel 400 can be manually rotated, so that the transmission flexible shaft 410 pulls the brake connecting rod 430 to move. The movement of the brake connecting rod 430 can move the brake lever 210 from the braking state to the non-braking state, realizing the release of the braking state of the emergency braking assembly 200. At this time, manually rotating the first handwheel 300 can provide power to the axle 110 to realize the manual movement of the transport vehicle.

[0055] Compared with the prior art, the utility model releases the automatic braking state of the transport vehicle in extreme situations by adding a manual braking release assembly and a manual transport assembly, and can convert the transmission torque of the transport vehicle into the steering wheel torque within the range of human power, providing a stable and reliable emergency control means for the transportation of reactor heavy tool equipment.

[0056] The specific structure and operation mechanism of the drive assembly are prior arts and will not be elaborated here.

[0057] In one embodiment, in combination with Figure 13 , the transport vehicle further includes an electric control handle 500, and the electric control handle 500 has a working mode and a self-locking mode; when the electric control handle 500 is in the working mode, the electric control handle 500 is used to control the actions of the emergency braking assembly 200 and the drive assembly; when the electric control handle 500 is in the self-locking mode, the electric control handle 500 disconnects the control of the emergency braking assembly 200 and the drive assembly.

[0058] Specifically, in combination with Figure 13 , a self-locking keyhole 510 and a control button 520 are provided on the electric control handle 500. When the self-locking key is not inserted into the self-locking keyhole 510, the electric control handle 500 is in the working mode. At this time, the control button 520 on the electric control handle 500 can control the actions of the emergency braking assembly 200 and the drive assembly; when the self-locking key is inserted into the self-locking keyhole 510 and rotated for locking, the electric control handle 500 is switched from the working mode to the self-locking mode.

[0059] In extreme situations, after the manual intervention mode is put into use, the electric control handle 500 can be removed to prevent the simultaneous intervention of the manual control and the remote electric control modes from causing conflicts in the built-in mechanisms under the two modes. At the same time, a self-locking keyhole 510 is added to the electric control handle 500. When the remote electric control mode is withdrawn from use, the function of the electric control handle 500 can be locked by the self-locking key, realizing double insurance protection and avoiding risks such as personal injury caused by misoperation of the electric control handle 500.

[0060] Without changing the original remote electric control mode of on-site equipment, the utility model adds a new set of electric remote control logic, improves the stability of equipment operation, and provides a stable and reliable emergency control means for the transportation of reactor heavy tool equipment.

[0061] In one embodiment, a transmission nut is provided at the first end of the transmission flexible shaft 410. The transmission flexible shaft 410 is in threaded cooperation with the transmission nut, and the transmission nut is connected to the second handwheel 400. When the second handwheel 400 rotates, the transmission nut rotates synchronously. Through the threaded cooperation between the transmission nut and the transmission flexible shaft 410, the transmission flexible shaft 410 can be driven to move.

[0062] In another embodiment, the first end of the transmission flexible shaft 410 is wound around the second handwheel 400. As the second handwheel 400 rotates, the second end of the transmission flexible shaft 410 is driven to move, and then the brake connecting rod 430 can be pulled to drive the brake lever 210 to move.

[0063] Combined with Figures 5 - 7 , in order to ensure the directional pulling effect of the transmission flexible shaft 410 on the brake connecting rod 430, the manual braking release assembly includes a fixing frame 420. Combined with Figure 12 , the fixing frame 420 is arranged on the vehicle body 100 and is provided with an installation hole 421; a fixing sleeve 411 is fixedly arranged outside the second end of the transmission flexible shaft 410. The fixing sleeve 411 is slidably arranged through the installation hole 421, and the axis of the installation hole 421 is parallel to the moving direction of the brake connecting rod 430.

[0064] Through the sliding cooperation between the fixing sleeve 411 with a rigid structure and the installation hole 421, the pulling of the first end of the transmission flexible shaft 410 by the second handwheel 400 can be converted into the movement of the second end of the transmission flexible shaft 410 along the axis of the installation hole 421, so that the force direction of the brake connecting rod 430 is kept parallel to the moving direction of the brake connecting rod 430.

[0065] Specifically, combined with Figure 11 , a limiting boss is arranged at the first end of the fixing sleeve 411, and an installation thread is arranged on the outer wall of the second end. The installation thread is in threaded cooperation with a limiting nut 412. The limiting boss and the limiting nut 412 are used to respectively abut and limit the two ends of the fixing frame 420. Through the arrangement of the limiting boss and the limiting nut 412, the fixing sleeve 411 always remains in a state of being matched with the installation hole 421 during the movement of the transmission flexible shaft 410.

[0066] In one embodiment, a first stopper 431 and a second stopper 432 are provided on the brake connecting rod 430, and a movable space for the brake lever 210 to pass through is formed between the first stopper 431 and the second stopper 432; the first stopper 431 is used to push the brake lever 210 to move from a non-braking state to a braking state, and the second stopper 432 is used to push the brake lever 210 to move from a braking state to a non-braking state.

[0067] When the transmission flexible shaft 410 pulls the brake connecting rod 430 to move in a first direction, the second stopper 432 can push the brake lever 210 to switch its state. When the brake connecting rod 430 moves in a second direction opposite to the first direction, the first stopper 431 can push the brake lever 210 to switch its state.

[0068] In order to simplify the structure, the emergency brake assembly 200 can also switch the brake lever 210 between the braking state and the non-braking state by driving the movement of the brake connecting rod 430. Figure 7 and Figure 8 In order to prevent the manual brake release assembly from affecting the brake connecting rod 430 when the power is not turned off, when the manual brake release assembly is in a non-operating state, the transmission flexible shaft 410 is in a relaxed state, and it has sufficient length margin to adapt to the position movement of the brake connecting rod 430 without causing the transmission flexible shaft 410 to drive the second hand wheel 400 to rotate in the reverse direction.

[0069] It should be noted that the figure shows an embodiment in which the movement of the brake lever 210 is swinging, but the movement of the brake lever 210 in the present invention is not limited to swinging, but can also slide, etc. The structure and working principle of the emergency brake assembly 200 are both prior art and will not be described in detail here.

[0070] In one embodiment, in combination Figure 9 and Figure 10 A switching groove 433 is provided on the brake connecting rod 430, and the brake lever 210 is inserted into the switching groove 433. The side walls of the switching groove 433 along the moving direction of the brake connecting rod 430 are used to push the brake lever 210 to move, thereby realizing the switching between the braking state and the non-braking state.

[0071] In order to ensure the directional sliding of the brake connecting rod 430, a slide groove is provided on the vehicle body 100, and the slide groove allows the brake connecting rod 430 to slide. The moving direction of the brake connecting rod 430 is usually parallel to the extension direction of the brake connecting rod 430, and correspondingly, the slide groove is arranged along the extension direction of the brake connecting rod 430.

[0072] In one embodiment, the first handwheel 300 is detachably connected to the gearbox 310, which facilitates removing the first handwheel 300 from the gearbox 310 and storing it when the manual brake release component is not in use.

[0073] Combined with Figure 4 , a lifting column 101 is provided on the transport vehicle. The manual transport component includes a mounting bracket 320, and the mounting bracket 320 is connected to the lifting column 101. The gearbox 310 is disposed on the mounting bracket 320 to ensure reliable fixation of the gearbox 310 on the vehicle body 100.

[0074] Both the first handwheel 300 and the second handwheel 400 can be disposed on the same outer facade of the vehicle body 100 for convenient operation.

[0075] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Specific technical means in some embodiments can be partially or wholly incorporated into other embodiments on the premise that they are not explicitly excluded by another embodiment. Therefore, the present invention will not be limited to these embodiments shown herein, but rather will conform to the broadest scope consistent with the principles and novel features disclosed herein.

Claims

1. A transport vehicle, characterized in that: include: A transport body, comprising a vehicle body (100), wheels (120) and a drive assembly, wherein the wheels (120) are rotatably arranged at the bottom of the vehicle body (100) via axles (110), and the drive assembly is arranged on the vehicle body (100) and is used to drive the wheels (120) to rotate; An emergency brake assembly (200) for braking the wheel (120) and comprising a brake lever (210) for controlling a braking state; A manual transport assembly, comprising a first hand wheel (300) and a gear box (310), wherein the first hand wheel (300) is drivingly connected to an input end of the gear box (310), an output end of the gear box (310) is drivingly connected to the axle (110), and the gear box (310) is arranged on the vehicle body (100); A manual brake release assembly comprises a second hand wheel (400), a transmission flexible shaft (410) and a brake connecting rod (430); the second hand wheel (400) is arranged on the vehicle body (100) and is in transmission connection with the first end of the transmission flexible shaft (410) for driving the second end of the transmission flexible shaft (410) to move; the second end of the transmission flexible shaft (410) is connected to the brake connecting rod (430); the brake connecting rod (430) is used to push the brake lever (210) to switch from a braking state to a non-braking state.

2. The transport vehicle according to claim 1, characterized in that: Also included is an electric control handle (500), the electric control handle (500) having a working mode and a self-locking mode; When the electric control handle (500) is in a working mode, the electric control handle (500) is used to control the actions of the emergency brake assembly (200) and the drive assembly; When the electric control handle (500) is in the self-locking mode, the electric control handle (500) disconnects the control of the emergency brake assembly (200) and the drive assembly.

3. The transport vehicle according to claim 2, characterized in that: The electric control handle (500) is provided with a self-locking keyhole (510); When the self-locking key is not inserted into the self-locking keyhole (510), the electric control handle (500) is in the working mode; when the self-locking key is inserted into the self-locking keyhole (510), the electric control handle (500) is in the self-locking mode.

4. The transport vehicle according to claim 1, characterized in that: A transmission nut is provided at the first end of the transmission flexible shaft (410), the transmission flexible shaft (410) and the transmission nut are threadedly matched, and the transmission nut is connected to the second hand wheel (400) and rotates synchronously; or, The first end of the transmission flexible shaft (410) is wound around the second hand wheel (400).

5. The transport vehicle according to claim 1, characterized in that: The manual brake release assembly comprises a fixing frame (420), the fixing frame (420) is arranged on the vehicle body (100) and is provided with a mounting hole (421), and the axis of the mounting hole (421) is parallel to the moving direction of the brake connecting rod (430); A fixing sleeve (411) is fixedly disposed outside the second end of the transmission flexible shaft (410), and the fixing sleeve (411) is slidably inserted into the mounting hole (421).

6. The transport vehicle according to claim 5, characterized in that: A limiting boss is provided at the first end of the fixing sleeve (411), and a mounting thread is provided on the outer wall of the second end. The mounting thread is threadably matched with a limiting nut (412). The limiting boss and the limiting nut (412) are used to respectively abut against the two ends of the fixing frame (420) for limiting position.

7. The transport vehicle according to claim 1, characterized in that: The brake connecting rod (430) is provided with a first stopper (431) and a second stopper (432), and a movable space for the brake lever (210) to pass through is formed between the first stopper (431) and the second stopper (432); The first stopper (431) is used to push the brake lever (210) to switch from a non-braking state to a braking state, and the second stopper (432) is used to push the brake lever (210) to switch from a braking state to a non-braking state.

8. The transport vehicle according to claim 1, characterized in that: The vehicle body (100) is provided with a slide groove, the slide groove is used for the brake connecting rod (430) to slide, and the slide groove is arranged along the extension direction of the brake connecting rod (430).

9. The transport vehicle according to claim 1, characterized in that: The first hand wheel (300) is detachably connected to the gear box (310).

10. The transport vehicle according to claim 1, characterized in that: The vehicle body (100) is provided with a hanging column (101), the manual transport assembly comprises a mounting frame (320), the mounting frame (320) is connected to the hanging column (101), and the gear box (310) is arranged on the mounting frame (320).

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