A material transfer vehicle

Abstract

This invention provides a material transfer cart, belonging to the field of engineering material transfer technology. The material transfer cart includes a frame, a control lever, a tipping bucket, a transmission device, and a self-unloading release device. The control lever and the tipping bucket are both located on the frame, which has an installation area. The tipping bucket is rotatably disposed within the installation area. The transmission mechanism includes two transmission components and a sliding component arranged opposite to each other, a first transmission shaft connecting the two transmission components to form synchronous movement, and a drive mechanism connected to the first transmission shaft. During operation, the tipping bucket is positioned close to the center of the frame, ensuring balanced force distribution and preventing tipping. The linear movement of the tipping bucket away from the control lever prevents engineering materials from accumulating in the same location, ensuring even material distribution and eliminating the need for traditional manual vehicle operation.

Description

Technical Field

[0001] This invention belongs to the field of engineering material transfer technology, and more specifically, relates to a material transfer vehicle. Background Technology

[0002] Construction refers to the production activities during the implementation phase of a project. It is the process of building various types of buildings, or the process of turning the lines on the design drawings into physical objects at a designated location. It includes foundation construction, main structure construction, roof construction, decoration construction, etc. The place where construction work is carried out is called the "construction site" or "construction site".

[0003] In existing technologies, material transfer vehicles (electric dump trucks) are often used during construction to transfer and process specific materials (building materials and construction waste).

[0004] However, in the aforementioned prior art, the tipper rotates through a self-unloading release device to unload engineering materials. Since the tipper can only achieve a flipping motion and cannot move linearly, the operator needs to operate the material transfer vehicle again during the self-unloading process to prevent the engineering materials from piling up in one place, which makes the process rather cumbersome. Summary of the Invention

[0005] This invention provides a material transfer vehicle, which aims to solve the problem that the tipper of existing material transfer vehicles cannot move linearly, resulting in cumbersome self-unloading.

[0006] In view of the above problems, the technical solution proposed by the present invention is as follows:

[0007] A material transfer cart includes a frame, a control lever, and a tipping bucket. The control lever and the tipping bucket are both located on the frame. The frame has an installation area, and the tipping bucket is rotatably disposed within the installation area. The cart includes:

[0008] A transmission device includes two transmission components and a sliding component arranged opposite to each other, a first transmission shaft connecting the two transmission components to form synchronous motion, and a drive mechanism connected to the first transmission shaft; wherein the two transmission components are respectively distributed on opposite sidewalls of the mounting area.

[0009] The self-unloading release device is connected to the transmission device and is configured to drive the tipping bucket to rotate and thus unload the material.

[0010] As a preferred embodiment of the present invention, the control lever includes a telescopic support rod and a control component disposed at the end of the telescopic support rod away from the vehicle frame.

[0011] As a preferred embodiment of the present invention, the control assembly includes a rotary cylinder sleeved on the telescopic support rod, two steering rods radially distributed along the rotary cylinder, and a grip disposed on each of the steering rods.

[0012] As a preferred embodiment of the present invention, a base plate is provided on the vehicle frame, and a drive structure is mounted on the base plate.

[0013] As a preferred embodiment of the present invention, the transmission component includes two first execution units disposed opposite to each other, a second execution unit disposed parallel to one of the first execution units, and a connecting part that drivesly connects the two first execution units and the second execution unit.

[0014] As a preferred embodiment of the present invention, the sliding assembly includes a support portion detachably connected to the side wall of the vehicle frame, at least two third actuators arranged sequentially along the length direction of the support portion, a fixing portion detachably connected to the at least two third actuators, and a first support plate.

[0015] As a preferred embodiment of the present invention, the transmission device includes a second support plate, and the self-unloading release device includes two support frames rotatably disposed on the second support plate and an adjustment component connected to the two support frames.

[0016] As a preferred embodiment of the present invention, the support frame includes a load-bearing portion, a first side portion and a second side portion connected to the load-bearing portion and forming a certain angle, a first ring disposed at one end of the load-bearing portion near the adjustment component, and a second ring disposed between the first side portion and the second side portion.

[0017] As a preferred embodiment of the present invention, the adjustment assembly includes a rotating arm connected to the two first rings, a second transmission shaft rotatably connected to the two rotating arms, a support disposed between the two rotating arms, and a push rod fixed to the support.

[0018] As a preferred embodiment of the present invention, the frame has a working surface, the working surface having a first groove and a toothed groove that are parallel to and extend toward the mounting area, the push rod includes a threaded sleeve and a lead screw with one end threadedly connected to the threaded sleeve, the self-unloading release device includes a mounting plate and a gear set located on the mounting plate, the mounting plate is fixed to the second support plate, the end of the lead screw away from the threaded sleeve is rotatably connected to the mounting plate, the gear set includes a first bevel gear sleeved on the lead screw, a second bevel gear meshing with the first bevel gear, and a spur gear arranged parallel to the second bevel gear; wherein, the spur gear is located outside the mounting plate and is connected to the second bevel gear through a synchronous shaft, the mounting plate can move linearly in the first groove toward or away from the mounting area, and the spur gear meshes with the toothed groove.

[0019] Compared with the prior art, the beneficial effects of the present invention are:

[0020] (1) The drive mechanism is driven by two transmission components through the first transmission axis. By utilizing the cooperation between the transmission components and the sliding components, the tipper can move linearly away from or towards the control lever. Furthermore, the self-unloading release device can be used to assist the tipper in turning, so as to realize the self-unloading of engineering materials. Therefore, compared with the traditional method, this application brings the tipper close to the middle position of the frame during the movement, ensuring that the frame is evenly stressed and does not tip over. The method of using the tipper to move linearly away from the control lever can avoid the accumulation of engineering materials in the same position, so that the engineering materials are stored evenly, and can eliminate the need for traditional manual operation of the vehicle for movement.

[0021] (2) The second support plate drives the mounting plate to move accordingly. The spur gear and the tooth groove form a fit and drive the second bevel gear to rotate. This allows the first bevel gear to drive the lead screw to rotate, causing the threaded sleeve to move linearly away from the lead screw. The rotating arm further flips towards the support frame and reduces the angle between it and the rotating arm, so that the support frame drives the bucket to flip downward to achieve self-unloading. This ensures greater stability when the bucket flips.

[0022] (3) When the tool cart stalls while going downhill, the first and second electromagnets repel each other, the slide moves linearly downward along the bearing block, and the damping sphere forms friction with the surface of the disc; in particular, the setting of the second groove further controls the speed of the tool cart. This helps to prevent the tool cart from stalling and ensures the safety of the operator.

[0023] The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention and to implement it in accordance with the contents of the specification, and in order to make the above and other objects, features and advantages of the present invention more apparent and understandable, specific embodiments of the present invention are described below. Attached Figure Description

[0024] Figure 1 This is a perspective view of a material transfer vehicle disclosed in this invention;

[0025] Figure 2 This is a schematic diagram of the internal structure of the frame of a material transfer vehicle disclosed in this invention;

[0026] Figure 3 This is a perspective view of the frame of a material transfer vehicle disclosed in this invention;

[0027] Figure 4 This is a schematic diagram of the control lever of a material transfer cart disclosed in this invention;

[0028] Figure 5 This is a schematic diagram of the transmission device of a material transfer cart disclosed in this invention;

[0029] Figure 6 This is a schematic diagram of the structure of a self-unloading release device for a material transfer vehicle disclosed in this invention;

[0030] Figure 7 This is a schematic diagram of the support frame of a material transfer cart disclosed in this invention;

[0031] Figure 8 This is a schematic diagram of the braking device of a material transfer vehicle disclosed in this invention;

[0032] Figure 9 This is a sectional view of the braking device of a material transfer vehicle disclosed in this invention;

[0033] Figure 10 This is a flowchart illustrating the usage method of a material transfer cart disclosed in this invention.

[0034] Explanation of reference numerals in the attached drawings: 10. Chassis; 11. Mounting area; 12. Working surface; 121. First groove; 122. Tooth groove; 13. Control lever; 131. Telescopic support rod; 132. Control assembly; 1321. Rotary drum; 1322. Steering rod; 1323. Handle; 14. Base plate; 15. Drive structure; 20. Tipping bucket; 30. Transmission device; 31. Conveying assembly; 311. First actuator; 312. Second actuator; 313. Connecting part; 32. Sliding assembly; 321. Support part; 322. Fixing part; 323. First support plate; 33. First drive shaft; 34. Drive mechanism; 35. Second support plate; 40. Self-unloading release device; 41. Support frame; 411. Load-bearing part; 412. First side; 413. Second side; 414. First ring; 415. Second ring; 42. Adjustment assembly; 421. Rotary arm; 422. Second drive shaft; 423. Support; 424. Push rod; 4241. Screw sleeve; 4242. Lead screw; 425. Mounting plate; 426. Gear set; 4261. First bevel gear; 4262. Second bevel gear; 4263. Spur gear; 50. Braking device; 51. Moving assembly; 511. Bearing block; 512. Slide plate; 52. Damping assembly; 521. Housing; 522. Moving rod; 523. Elastic element; 524. Damping ball; 53. Disc; 531. Second groove; 54. First electromagnet; 55. Second electromagnet. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, 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, 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.

[0036] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0037] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0038] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0039] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0040] Example 1

[0041] See attached document Figures 1-9 As shown, the present invention provides a technical solution: a material transfer cart, the cart including a frame 10, a control lever 13, a tipping bucket 20, a transmission device 30, and a self-unloading release device 40. The control lever 13 and the tipping bucket 20 are both located on the frame 10, the frame 10 forming an installation area 11, and the tipping bucket 20 is rotatably disposed within the installation area 11; the transmission device 30 includes two transmission components 31 and a sliding component 32 disposed opposite to each other, a first transmission shaft 33 connecting the two transmission components 31 to form synchronous motion, and a drive mechanism 34 connected to the first transmission shaft 33; wherein, the two transmission components 31 are respectively distributed on opposite side walls of the installation area 11; the self-unloading release device 40 is connected to the transmission device 30 and is configured to drive the tipping bucket 20 to rotate and thus self-unload materials.

[0042] For example, the self-unloading release device 40 can utilize a conventional self-unloading structure.

[0043] According to this embodiment, the drive mechanism 34 transmits power to the two conveying components 31 via the first transmission shaft 33. Utilizing the cooperation between the conveying components 31 and the sliding component 32, the tipping bucket 20 can move linearly away from or towards the control lever 13. Furthermore, the self-unloading release device 40 can assist in tipping the bucket 20 to achieve self-unloading of engineering materials. Therefore, compared to the traditional method, this application positions the tipping bucket 20 close to the center of the frame 10 during movement, ensuring that the frame 10 is evenly stressed and does not tip over. The linear movement of the tipping bucket 20 away from the control lever 13 avoids the accumulation of engineering materials in the same location, ensuring even storage of the materials and eliminating the need for traditional manual vehicle operation.

[0044] See attached document Figure 1 and 4 As shown, in some embodiments, the joystick 13 includes a telescopic strut 131 and a control assembly 132 disposed at the end of the telescopic strut 131 away from the frame 10. In this embodiment, the control assembly 132 includes a rotary cylinder 1321 sleeved on the telescopic strut 131, two steering rods 1322 radially distributed along the rotary cylinder 1321, and a grip 1323 disposed on each steering rod 1322.

[0045] For example, the working principle of the steering lever 1322 and the grip 1323 is the same as that of speed regulation using a throttle on an electric vehicle. The cooperation between the steering lever 1322 and the grip 1323 can be used for speed regulation. The rotary drum 1321 is electrically connected to the telescopic support rod 131. Furthermore, it should be noted that the working principle of speed regulation using a throttle on an electric vehicle is a mature existing technology and will not be described in detail here.

[0046] According to this embodiment, based on the cooperation between the rotating drum 1321 and the telescopic support rod 131, the rotating drum 1321 is controlled to rotate around the telescopic support rod 131 in a certain direction and angle. The drive structure 15 will then adjust the corresponding rotation direction and angle to achieve the steering of the tool cart. The handle 1323 is controlled to rotate around the steering rod 1322 in a certain direction and angle to achieve the speed adjustment of the tool cart.

[0047] See attached document Figures 1-2 As shown, in some embodiments, a base plate 14 is provided on the frame 10, and a drive structure 15 is mounted on the base plate 14. Exemplarily, the drive structure 15 may be a steering wheel drive structure 15. According to this embodiment, the autonomous steering of the tool vehicle is achieved by utilizing this steering wheel drive structure 15 and based on the action of the rotating drum 1321 and the telescopic support rod 131.

[0048] See attached document Figure 1 and 5As shown, in some embodiments, the transmission component 31 includes two first execution units 311 disposed opposite to each other, a second execution unit 312 disposed parallel to one of the first execution units 311, and a connecting part 313 that drivesly connects the two first execution units 311 and the second execution unit 312.

[0049] For example, both the first actuator 311 and the second actuator 312 can be gears or timing pulleys, etc. The connecting part 313 can be a transmission chain or a toothed belt, etc. If the first actuator 311 and the second actuator 312 are gears, the connecting part 313 is a transmission chain; if the first actuator 311 and the second actuator 312 are timing pulleys, the connecting part 313 is a toothed belt. The diameter of the second actuator 312 can be the same as or different from that of the first actuator 311.

[0050] According to this embodiment, during the transmission process, the second actuator 312 plays the role of active transmission through the transmission of the first drive shaft 33, and the two first actuators 311 play the role of passive transmission and support the connecting part 313 so that the connecting part 313 remains horizontal.

[0051] See attached document Figure 1 and 5 As shown, in some embodiments, the sliding assembly 32 includes a support portion 321 detachably connected to the side wall of the frame 10, at least two third actuators arranged sequentially along the length of the support portion 321, a fixing portion 322 detachably connected to the at least two third actuators, and a first support plate 323.

[0052] For example, the support part 321 may be a guide rail, the third actuation part may be a slider, and the fixing part 322 may be a connecting sleeve.

[0053] According to this embodiment, as the connecting part 313 moves, the fixing part 322 can drive the third execution part to move linearly along the length direction of the support part 321, thereby realizing transmission.

[0054] See attached document Figure 1 and 6 As shown in ~7, in some embodiments, the transmission device 30 includes a second support plate 35, and the self-unloading release device 40 includes two support frames 41 rotatably disposed on the second support plate 35 and an adjustment assembly 42 connected to the two support frames 41.

[0055] According to this embodiment, the support frame 41 undergoes a flipping motion on the second support plate 35 after the action of the adjustment component 42, so that the tipping bucket 20 tilts.

[0056] See attached document Figure 7As shown, in some embodiments, the support frame 41 includes a load portion 411, a first side portion 412 and a second side portion 413 connected to the load portion 411 and forming a certain angle, a first ring 414 disposed at one end of the load portion 411 near the adjustment assembly 42, and a second ring 415 disposed between the first side portion 412 and the second side portion 413.

[0057] According to this embodiment, the load portion 411, the first side portion 412, the second side portion 413, and the second ring 415 can form a triangular structure to ensure more stable support for the tipping bucket 20.

[0058] See attached document Figures 1-2 As shown in Figures 6 and 7, in some embodiments, the adjusting assembly 42 includes a rotating arm 421 connected to two first rings 414, a second drive shaft 422 rotatably connected to the two rotating arms 421, a support 423 disposed between the two rotating arms 421, and a push rod 424 fixed to the support 423. In this embodiment, the frame 10 has a working surface 12, which has a first groove 121 and a toothed groove 122 that are parallel to and extend toward the mounting area 11. The push rod 424 includes a threaded sleeve and a lead screw 4242 with one end threadedly connected to the threaded sleeve. The self-unloading release device 40 includes a mounting plate 425 and a gear set 426 located on the mounting plate 425. The mounting plate 425 is fixed to the second support plate 35. The end of the lead screw 4242 away from the threaded sleeve is rotatably connected to the mounting plate 425. Group 426 includes a first bevel gear 4261 sleeved on a lead screw 4242, a second bevel gear 4262 meshing with the first bevel gear 4261, and a spur gear 4263 arranged parallel to the second bevel gear 4262; wherein, the spur gear 4263 is located outside the mounting plate 425 and is connected to the second bevel gear 4262 through a synchronous shaft, the mounting plate 425 can move linearly in the first groove 121 toward or away from the mounting area 11, and the spur gear 4263 meshes with the tooth groove 122.

[0059] According to this embodiment, as the tipping bucket 20 moves away from the control lever 13, the second support plate 35 drives the mounting plate 425 to move accordingly. The spur gear 4263 engages with the tooth groove 122 and drives the second bevel gear 4262 to rotate, which in turn causes the first bevel gear 4261 to drive the lead screw 4242 to rotate, causing the threaded sleeve to move linearly away from the lead screw 4242. At this time, the rotating arm 421 further flips towards the support frame 41 and reduces the angle between the rotating arm 421 and the support frame 41, allowing the tipping bucket 20 to flip downwards to achieve self-unloading.

[0060] See attached document Figure 1 and 8As shown in Figure 9, in some embodiments, the utility vehicle includes two braking devices 50 arranged opposite to each other. Each braking device 50 is mounted on the side wall of the frame 10 near each rear wheel. The braking device 50 includes a moving assembly 51, a damping assembly 52 disposed on the moving assembly 51, a disc 53 sleeved on the axle of the rear wheel, a first electromagnet 54 disposed on the moving assembly 51, and a second electromagnet 55 spaced apart from the first electromagnet 54; the second electromagnet 55 is fixed to the side wall of the frame 10. In this embodiment, the moving assembly 51 includes a support block 511 fixed to the side wall of the frame 10 and a sliding plate 512 that slides vertically along the support block 511; the damping assembly 52 includes a housing 521, a moving rod 522 with one end located in the housing 521 and moving linearly in the vertical direction, an elastic element 523 disposed between the housing 521 and the moving rod 522, and a damping ball 524 disposed at the end of the moving rod 522 away from the housing 521. The disk 53 has multiple second grooves 531 distributed along its circumference.

[0061] For example, the elastic element 523 can be a spring with a certain rigidity.

[0062] In this implementation, a gyroscope and sensors are installed on the frame 10. When the tool cart stalls while going downhill, the first electromagnet 54 and the second electromagnet 55 repel each other, the slide plate 512 moves linearly downward along the support block 511, and the damping ball 524 forms friction with the surface of the disk 53; in particular, the setting of the second groove 531 further controls the speed of the tool cart. Under normal conditions, the first electromagnet 54 and the second electromagnet 55 attract each other, and there is a certain distance between the damping ball 524 and the disk 53 to avoid contact between the damping ball 524 and the disk 53.

[0063] The drive mechanism 34 is a motor, such as a geared motor. The drive mechanism 34 can be mounted on the base plate 14.

[0064] Example 2

[0065] See attached document Figure 10 As shown in the figure, another embodiment of the present invention provides a method for using a material transfer cart, which includes the following steps:

[0066] S1, During self-unloading, the drive mechanism 34 transmits power to the two second actuators 312 through the first transmission shaft 33. With the help of the connecting part 313, the two first actuators 311 rotate. At the same time, the connecting part 313 can drive the third actuator to move along the support part 321, so that the tipping bucket 20 moves linearly away from the installation area 11.

[0067] S2, at the same time, the second support plate 35 drives the mounting plate 425 to move accordingly, the spur gear 4263 and the tooth groove 122 form a cooperation and drive the second bevel gear 4262 to rotate, which in turn allows the first bevel gear 4261 to drive the lead screw 4242 to rotate, so that the threaded sleeve moves linearly away from the lead screw 4242, the rotating arm 421 further flips towards the support frame 41 and reduces the angle between the rotating arm 421 and the support frame 41, so that the support frame 41 drives the tipping bucket 20 to flip downward to achieve self-unloading.

[0068] It should be noted that the model and specifications of the drive mechanism 34 need to be selected and determined according to the actual specifications of the device. The specific selection and calculation method adopts the existing technology in this field, so it will not be described in detail here.

[0069] The power supply and principle of the drive mechanism 34 are clear to those skilled in the art and will not be described in detail here.

[0070] The above are merely preferred embodiments of the present invention and are not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A material transfer vehicle, the vehicle comprising a frame, a steering lever and a tipping bucket, the steering lever and the tipping bucket being located on the frame, characterized in that: the frame is formed with a mounting area, the tipping bucket is rotatably arranged in the mounting area; the vehicle comprises: a transmission device, the transmission device comprising two transmission assemblies and a sliding assembly arranged opposite to each other, a first transmission shaft connecting the two transmission assemblies and forming a synchronous motion, and a driving mechanism connected with the first transmission shaft; wherein the two transmission assemblies are respectively distributed on the opposite side walls of the mounting area; the transmission assembly comprises two first execution parts arranged opposite to each other, a second execution part arranged in parallel with one of the first execution parts, and a connecting part drivingly connecting the two first execution parts and the second execution part; the sliding assembly comprises a support part detachably connected to the side wall of the frame, at least two third execution parts arranged in sequence along the length direction of the support part, a fixing part detachably connected to the at least two third execution parts, and a first support plate; the transmission device further comprises a second support plate; a self-unloading release device connected with the transmission device and configured to drive the tipping bucket to rotate and thereby self-unload the material, the self-unloading release device comprising two support frames rotatably arranged on the second support plate and an adjusting assembly connected with the two support frames, the support frame comprising a load part, a first side part and a second side part connected with the load part and forming a certain angle, a first circular ring arranged at the end of the load part close to the adjusting assembly, and a second circular ring arranged between the first side part and the second side part, the adjusting assembly comprising a rotating arm connected with the two first circular rings, a second transmission shaft rotatably connected with the two rotating arms, a support arranged between the two rotating arms, and a push rod fixed on the support; two brake devices arranged opposite to each other, each of the brake devices being mounted on the side wall of the frame close to each rear wheel, the brake device comprising a moving assembly, a damping assembly arranged on the moving assembly, a disc arranged on the rotating shaft of the rear wheel, a first electromagnet arranged on the moving assembly, and a second electromagnet arranged spaced apart from the first electromagnet, the second electromagnet being fixed on the side wall of the frame; the moving assembly further comprises a bearing block fixed on the side wall of the frame, and a sliding plate sliding in the vertical direction of the bearing block; the damping assembly comprises a housing, a moving rod linearly moving in the vertical direction at one end of the housing, an elastic member arranged between the housing and the moving rod, and a damping spherical ball arranged at the end of the moving rod away from the housing, the disc being distributed with a plurality of second grooves in the circumferential direction; The gyro and sensor are installed on the frame, when the tool car loses speed when going downhill, the first electromagnet and the second electromagnet repel each other, the slide plate moves linearly downward along the bearing block, the damping ball and the disc surface form a friction force, the second groove is arranged to further control the speed of the tool car, in normal state, the first electromagnet and the second electromagnet attract each other, and there is a certain distance between the damping ball and the disc; The frame is also formed with a working surface, the working surface is provided with a first groove and a tooth groove parallel to each other and extending towards the mounting area, the push rod comprises a threaded sleeve and a lead screw threadedly connected to one end of the threaded sleeve, the self-release device comprises a mounting plate and a gear set on the mounting plate, the mounting plate is fixed with the second support plate, one end of the lead screw away from the threaded sleeve is rotationally connected with the mounting plate, and the gear set comprises a first bevel gear sleeved on the lead screw, a second bevel gear meshing with the first bevel gear, and a spur gear arranged in parallel with the second bevel gear; wherein the spur gear is located outside the mounting plate and connected with the second bevel gear through a synchronous shaft, the mounting plate can move linearly towards or away from the mounting area in the first groove, and the spur gear is meshed with the tooth groove.

2. A material handling vehicle according to claim 1 wherein, The operating rod comprises a telescopic support rod and an operating assembly arranged at one end of the telescopic support rod away from the frame.

3. A material handling vehicle according to claim 2 wherein, The operating assembly comprises a rotating drum sleeved on the telescopic support rod, two steering rods radially distributed along the rotating drum, and a handle arranged on each steering rod.

4. The material handling vehicle of claim 1 wherein, The frame is provided with a bottom plate, and the driving structure is installed on the bottom plate.

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