An alpine meadow profiling, trimming, cutting and collecting integrated device
By using a dot matrix mowing assembly and a floating control system, the problem of inconsistent grass cutting height on raised ground in alpine grasslands has been solved, achieving uniformity in grass cutting height and synchronization of grass clipping collection.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- YUNNAN ACAD OF FORESTRY
- Filing Date
- 2026-04-23
- Publication Date
- 2026-06-19
AI Technical Summary
When mowing grasslands in high-altitude and cold mountainous areas, existing lawnmowers cannot ensure that the grass stalks are cut at a consistent height on raised ground, and may even cut the turf, resulting in uneven mowing.
It adopts a dot matrix mowing assembly, including a floating mower and a floating control assembly. The floating mower adaptively adjusts the cutting position according to the ground height, and combines with a negative pressure suction fan to collect grass clippings.
It achieves uniformity in grass cutting height and synchronous collection of grass clippings on uneven grasslands, avoiding problems related to turf cutting and uneven grasslands.
Smart Images
Figure CN122228831A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of grass mowing equipment technology, specifically to an integrated device for contour-following mowing and collection of grass in high-altitude grasslands. Background Technology
[0002] Lawn mowing is an important part of maintaining the health and appearance of lawns. However, there are significant challenges when mowing lawns that grow close to the ground in high-altitude and cold mountainous areas. The terrain in mountainous areas is complex, with poor flatness and many bumps and depressions, making it difficult to achieve a neat mowing.
[0003] CN105830623A discloses a lawnmower, including a frame, a handle assembly, a power assembly, a transmission assembly, a walking assembly, and a blade assembly mounted on the frame. The handle assembly is used to control the lawnmower. The power assembly outputs power to the transmission assembly, and the transmission assembly outputs power to the walking assembly and the blade assembly. The power assembly includes a motor and a battery pack. The battery pack outputs power to the motor to drive the transmission assembly to rotate.
[0004] The lawnmower described in the above technical solution has certain shortcomings in use, as shown in the attached document. Figure 8 As shown, when there are bumps on the ground, the roller blade assembly cannot ensure that the height of the grass stalks after cutting is the same at the cutting points, and may even cut off the turf, so it is difficult to achieve a flat cut. Summary of the Invention
[0005] The purpose of this invention is to provide an integrated device for contour-following mowing and collection of grass in alpine grasslands, which solves the problem that the roller blade assembly cannot ensure that the height of the grass stalks after mowing is the same when there are protrusions on the ground, and may even cut off the sod.
[0006] The present invention solves the above-mentioned technical problems through the following technical solutions, the present invention comprising: The vehicle body is used for the movement of the control device, and wheels are installed at both the front and rear ends of the vehicle body. A dot-matrix mowing assembly is located at the bottom of the vehicle body. The dot-matrix mowing assembly includes a mounting plate and multiple floating mowers. A mounting slot is provided on the top of the vehicle body, and the mounting plate is fixedly installed in the mounting slot. The floating mowers are all installed at the bottom of the mounting plate. The multiple floating mowers are arranged in two rows, alternating front and back. There are partitions between the floating mowers in the same row, with a length less than the effective cutting length of the floating mower. The floating mowers can adaptively adjust the cutting position according to the ground height to keep the remaining grass at the same height after cutting grass at different horizontal levels.
[0007] Preferably, the floating lawnmower includes a mounting frame, a bottom blade, a moving blade assembly, positioning wheels, and a floating control assembly. The mounting frame is mounted on the bottom of the mounting plate via the floating control assembly, which controls the mounting frame to adaptively move up and down at different horizontal positions. The bottom blade is fixedly mounted on the bottom of the mounting frame. The moving blade assembly is disposed within the mounting frame and includes a motor, a rotating frame, and multiple roller blades. The motor is mounted on one side of the rotating frame, which is rotatably mounted within the mounting frame and mounted at the output end of the motor. The roller blades are evenly mounted on the edge of the rotating frame, and the positioning wheels are mounted on the bottom of the mounting plate.
[0008] Preferably, the floating control assembly includes a fixed cylinder, a floating cylinder, a limiting spring, an upper mounting block, and a lower mounting block. The fixed cylinder is mounted on the bottom of the mounting plate via the upper mounting block, and the floating cylinder is mounted on the top of the mounting frame via the lower mounting block. The top of the floating cylinder passes through the fixed cylinder, and the limiting spring is installed between the top of the floating cylinder and the upper mounting block.
[0009] Preferably, a limiting ring is provided at the outer edge of the top of the floating cylinder, and the limiting ring is engaged inside the fixed cylinder.
[0010] Preferably, a collection component is provided on the top of the vehicle body, which is used to collect the cut grass clippings.
[0011] Preferably, the collection assembly includes a fixed shell, two suction pipes, a negative pressure fan, and a collection box. The fixed shell is fixedly installed on the top of the vehicle body, and the two suction pipes are installed at the bottom of the fixed shell. Two through slots are opened on the top of the vehicle body and the mounting plate. The suction pipes are inserted into the through slots. The two suction pipes are respectively located behind the two rows of floating lawnmowers. The negative pressure fan is installed inside the fixed shell, and the collection box is installed on the rear side of the vehicle body. The collection box is connected to the exhaust end of the negative pressure fan.
[0012] Preferably, the front side of the bottom of the suction pipe is open, and a movable baffle is rotatably installed on the rear side of the bottom of the suction pipe.
[0013] Preferably, a dustproof shell is installed on the top of the fixed shell, and the negative pressure suction fan is installed inside the dustproof shell.
[0014] Preferably, an armrest is installed on the rear side of the vehicle body, and the armrest is covered with an anti-slip sleeve.
[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. The present invention uses a dot matrix mowing component to adaptively adjust the cutting position according to the ground height to keep the remaining grass stalks at the same height after cutting, even if the grass stalks are located at different levels. This can prevent the cutting length from being too long or even cutting into the ground due to uneven grass, and the cut grass stalks are of the same and uniform height.
[0016] 2. This invention uses a negative pressure suction fan to draw grass clippings from under the vehicle body into a collection box through a suction pipe, thus enabling the collection of grass clippings during the mowing operation. Attached Figure Description
[0017] Figure 1 This is a top view of the structure of the present invention; Figure 2 This is a bottom view of the structure of the present invention; Figure 3 This is an exploded view of the vehicle body of the present invention; Figure 4 This is a structural view of the floating lawnmower of the present invention; Figure 5 This is an exploded view of the floating lawnmower of the present invention; Figure 6 This is an exploded top view of the floating control component of the present invention; Figure 7 This is an exploded view of the floating control component of the present invention from a bottom angle; Figure 8 Diagram showing the current usage status of existing lawnmowers; Figure 9 This is a diagram showing the usage state of the present invention.
[0018] The numbers in the image represent: 1. Vehicle body; 2. Wheels; 3. Dot matrix mowing assembly; 4. Mounting plate; 5. Floating mower; 501. Mounting frame; 502. Bottom blade; 503. Moving blade assembly; 5031. Motor; 5032. Rotating frame; 5033. Roller blade; 504. Positioning wheel; 505. Floating control assembly; 5051. Fixed cylinder; 5052. Floating cylinder; 5053. Limiting spring; 5054. Upper mounting block; 5055. Lower mounting block; 6. Limiting ring; 7. Collection assembly; 701. Fixed shell; 702. Suction pipe; 703. Negative pressure fan; 704. Collection box; 8. Through groove; 9. Movable baffle; 10. Dustproof shell; 11. Handrail; 12. Anti-slip sleeve. Detailed Implementation
[0019] The above-mentioned and other technical features and advantages of the present invention will be described in more detail below with reference to the accompanying drawings.
[0020] Example 1 This embodiment provides a technical solution: an integrated device for contour-following and harvesting alpine grasslands, such as... Figures 1-9 As shown, it includes a vehicle body 1 and a dot-matrix lawn mowing assembly 3.
[0021] In specific implementations, such as Figure 1 As shown, the vehicle body 1 is used for the movement of the control device, and wheels 2 are installed at both the front and rear ends of the vehicle body 1.
[0022] In specific implementations, such as Figures 1-3 As shown, the dot matrix mowing assembly 3 is located at the bottom of the vehicle body 1. The dot matrix mowing assembly 3 includes a mounting plate 4 and multiple floating mowers 5. The top of the vehicle body 1 has a mounting groove, and the mounting plate 4 is fixedly installed in the mounting groove. The floating mowers 5 are all installed at the bottom of the mounting plate 4. The multiple floating mowers 5 are arranged in two rows, alternating front and back. There are partitions between the floating mowers 5 in the same row, with a length less than the effective cutting length of the floating mower 5. Therefore, it can be ensured that when the vehicle body 1 moves, the dot matrix mowing assembly 3 can completely cut the grass in the area within its working range. The floating mowers 5 can adaptively adjust the cutting position according to the ground height to keep the remaining grass height after cutting grass at different levels the same, thereby preventing the situation where the cutting length is too long or even cuts into the ground due to uneven grass.
[0023] In specific implementations, such as Figure 4 and Figure 5 As shown, the floating mower 5 includes a mounting frame 501, a bottom blade 502, a moving blade assembly 503, positioning wheels 504, and a floating control assembly 505. The mounting frame 501 is mounted on the bottom of the mounting plate 4 via the floating control assembly 505. The floating control assembly 505 controls the mounting frame 501 to move adaptively up and down at different horizontal positions, thereby enabling the floating mower 5 to adaptively adjust its position when cutting grass at different horizontal levels. The bottom blade 502 is fixedly mounted on the bottom of the mounting frame 501. Mounting plates are welded to both rear sides of the bottom blade 502, and the mounting plates are fixedly mounted on the mounting frame 501 by bolts and nuts. The moving blade assembly 503 is disposed inside the mounting frame 501. The device includes a motor 5031, a rotating frame 5032, and multiple rollers 5033. The motor 5031 is mounted on one side of the rotating frame 5032. The rotating frame 5032 is rotatably mounted inside the mounting frame 501 and is mounted on the output end of the motor 5031. The rollers 5033 are evenly mounted on the edge of the rotating frame 5032. The rollers 5033 are segmented rotating blades. The actual cutting lengths of adjacent rollers 5033 overlap, thus ensuring that there is always a cutting part to cut the grass stalks during mowing. The positioning wheel 504 is mounted on the bottom of the mounting. Under normal conditions, the bottom of the positioning wheel 504 is on the same horizontal plane as the bottom of the wheel 2. The positioning wheel 504 facilitates the movement of the floating mower 5.
[0024] In specific implementations, such as Figure 6 and Figure 7 As shown, the floating control assembly 505 includes a fixed cylinder 5051, a floating cylinder 5052, a limit spring 5053, an upper mounting block 5054, and a lower mounting block 5055. The fixed cylinder 5051 is mounted on the bottom of the mounting plate 4 via the upper mounting block 5054. A pin is provided at the bottom of the upper mounting block 5054, which is engaged with the top of the fixed cylinder 5051 and fixed to the fixed cylinder 5051 by bolts. A bolt is mounted on the top of the upper mounting block 5054, which passes through the mounting plate 4 and is fixed by a nut at the other end. The floating cylinder 5052 is mounted on the top of the mounting bracket 501 via the lower mounting block 5055. Bolts are installed at the bottom of the lower mounting block 5055. The bolts pass through the top of the mounting bracket 501 and are fixed by nuts at the other end. The top of the floating cylinder 5052 passes through the fixed cylinder 5051. The limiting spring 5053 is installed between the top of the floating cylinder 5052 and the upper mounting block 5054. When the floating mower 5 in the dot matrix mowing assembly 3 passes through the protruding position, the floating mower 5 above the protruding area can squeeze the limiting spring 5053 of the floating control assembly 505, thereby adaptively adjusting the position of the floating mower 5. Therefore, it can ensure that the height of the grass after mowing is the same in each position.
[0025] Furthermore, a limiting ring 6 is provided on the outer edge of the top of the floating cylinder 5052. The limiting ring 6 is locked inside the fixed cylinder 5051. The limiting ring 6 can prevent the floating cylinder 5052 from separating from the fixed cylinder 5051, thereby ensuring stability during connection.
[0026] Furthermore, a handrail 11 is installed on the rear side of the vehicle body 1. The handrail 11 allows for easy movement of the device. An anti-slip sleeve 12 is fitted on the handrail 11 to make the hand grip more comfortable.
[0027] In this embodiment, the device can be moved in high-altitude mountainous areas by using the handle 11. During the mowing operation, the motors 5031 of each floating mower 5 are connected to an external power source. The motors 5031 can drive the rotating frame 5032 to rotate, thereby driving each blade 5033 to rotate. When the blades 5033 rotate, they can push the grass stalks to cut them at the connection between the blades 5033 and the bottom blade 502. When the ground protrudes, such as... Figure 9 As shown, the bottom positioning wheel 504 of the floating mower 5 at the protruding position can push the mounting frame 501 upward, while the floating cylinder 5052 can squeeze the limiting spring 5053 and move upward, thereby ensuring that the cutting position of the floating mower 5 at different horizontal positions is the same, thus ensuring that the height of the grass after trimming is the same and neat.
[0028] Example 2 This embodiment provides a technical solution: an integrated device for contour-following and harvesting alpine grasslands, such as... Figures 1-9 As shown, it includes a vehicle body 1 and a dot-matrix lawn mowing assembly 3.
[0029] In specific implementations, such as Figure 1 As shown, the vehicle body 1 is used for the movement of the control device, and wheels 2 are installed at both the front and rear ends of the vehicle body 1.
[0030] In specific implementations, such as Figures 1-3 As shown, the dot matrix mowing assembly 3 is located at the bottom of the vehicle body 1. The dot matrix mowing assembly 3 includes a mounting plate 4 and multiple floating mowers 5. The top of the vehicle body 1 has a mounting groove, and the mounting plate 4 is fixedly installed in the mounting groove. The floating mowers 5 are all installed at the bottom of the mounting plate 4. The multiple floating mowers 5 are arranged in two rows, alternating front and back. There are partitions between the floating mowers 5 in the same row, with a length less than the effective cutting length of the floating mower 5. Therefore, it can be ensured that when the vehicle body 1 moves, the dot matrix mowing assembly 3 can completely cut the grass in the area within its working range. The floating mowers 5 can adaptively adjust the cutting position according to the ground height to keep the remaining grass height after cutting grass at different levels the same, thereby preventing the situation where the cutting length is too long or even cuts into the ground due to uneven grass.
[0031] In specific implementations, such as Figure 4 and Figure 5 As shown, the floating mower 5 includes a mounting frame 501, a bottom blade 502, a moving blade assembly 503, positioning wheels 504, and a floating control assembly 505. The mounting frame 501 is mounted on the bottom of the mounting plate 4 via the floating control assembly 505. The floating control assembly 505 controls the mounting frame 501 to move adaptively up and down at different horizontal positions, thereby enabling the floating mower 5 to adaptively adjust its position when cutting grass at different horizontal levels. The bottom blade 502 is fixedly mounted on the bottom of the mounting frame 501. Mounting plates are welded to both rear sides of the bottom blade 502, and the mounting plates are fixedly mounted on the mounting frame 501 by bolts and nuts. The moving blade assembly 503 is disposed inside the mounting frame 501. The device includes a motor 5031, a rotating frame 5032, and multiple rollers 5033. The motor 5031 is mounted on one side of the rotating frame 5032. The rotating frame 5032 is rotatably mounted inside the mounting frame 501 and is mounted on the output end of the motor 5031. The rollers 5033 are evenly mounted on the edge of the rotating frame 5032. The rollers 5033 are segmented rotating blades. The actual cutting lengths of adjacent rollers 5033 overlap, thus ensuring that there is always a cutting part to cut the grass stalks during mowing. The positioning wheel 504 is mounted on the bottom of the mounting. Under normal conditions, the bottom of the positioning wheel 504 is on the same horizontal plane as the bottom of the wheel 2. The positioning wheel 504 facilitates the movement of the floating mower 5.
[0032] In specific implementations, such as Figure 6 and Figure 7 As shown, the floating control assembly 505 includes a fixed cylinder 5051, a floating cylinder 5052, a limit spring 5053, an upper mounting block 5054, and a lower mounting block 5055. The fixed cylinder 5051 is mounted on the bottom of the mounting plate 4 via the upper mounting block 5054. A pin is provided at the bottom of the upper mounting block 5054, which is engaged with the top of the fixed cylinder 5051 and fixed to the fixed cylinder 5051 by bolts. A bolt is mounted on the top of the upper mounting block 5054, which passes through the mounting plate 4 and is fixed by a nut at the other end. The floating cylinder 5052 is mounted on the top of the mounting bracket 501 via the lower mounting block 5055. Bolts are installed at the bottom of the lower mounting block 5055. The bolts pass through the top of the mounting bracket 501 and are fixed by nuts at the other end. The top of the floating cylinder 5052 passes through the fixed cylinder 5051. The limiting spring 5053 is installed between the top of the floating cylinder 5052 and the upper mounting block 5054. When the floating mower 5 in the dot matrix mowing assembly 3 passes through the protruding position, the floating mower 5 above the protruding area can squeeze the limiting spring 5053 of the floating control assembly 505, thereby adaptively adjusting the position of the floating mower 5. Therefore, it can ensure that the height of the grass after mowing is the same in each position.
[0033] Furthermore, a limiting ring 6 is provided on the outer edge of the top of the floating cylinder 5052. The limiting ring 6 is locked inside the fixed cylinder 5051. The limiting ring 6 can prevent the floating cylinder 5052 from separating from the fixed cylinder 5051, thereby ensuring stability during connection.
[0034] In specific implementations, such as Figure 3 As shown, a collection assembly 7 is installed on the top of the vehicle body 1. The collection assembly 7 is used to collect the cut grass clippings. The collection assembly 7 includes a fixed shell 701, two suction pipes 702, a negative pressure suction fan 703, and a collection box 704. The fixed shell 701 is fixedly installed on the top of the vehicle body 1, and the two suction pipes 702 are installed at the bottom of the fixed shell 701. Two through slots 8 are opened on the top of the vehicle body 1 and the mounting plate 4. The suction pipes 702 are inserted into the through slots 8. The two suction pipes 702 are respectively located behind the two rows of floating mowers 5. The negative pressure suction fan 703 is installed in the fixed shell 701. The collection box 704 is installed on the rear side of the vehicle body 1. The collection box 704 is connected to the exhaust end of the negative pressure suction fan 703. The negative pressure suction fan 703 can draw the grass clippings below the vehicle body 1 into the collection box 704 through the suction pipes 702, so that grass clippings can be collected at the same time as the mowing operation.
[0035] Furthermore, the bottom front of the suction pipe 702 is open, and a movable baffle 9 is rotatably installed on the bottom rear of the suction pipe 702. Therefore, the movable baffle 9 can rotate adaptively when it touches the ground to prevent obstruction.
[0036] Furthermore, a dust cover 10 is installed on the top of the fixed housing 701, and the negative pressure suction fan 703 is installed inside the dust cover 10. The dust cover 10 can protect the negative pressure suction fan 703.
[0037] Furthermore, a handrail 11 is installed on the rear side of the vehicle body 1. The handrail 11 allows for easy movement of the device. An anti-slip sleeve 12 is fitted on the handrail 11 to make the hand grip more comfortable.
[0038] In this embodiment, the device can be moved in high-altitude mountainous areas by using the handle 11. During mowing, the motors 5031 and negative pressure fans 703 of each floating mower 5 are connected to an external power source. The motors 5031 drive the rotating frame 5032 to rotate, which in turn drives each blade 5033 to rotate. When the blades 5033 rotate, they can move the grass stalks to cut them at the connection between the blades 5033 and the bottom blade 502. When the ground protrudes, such as... Figure 9 As shown, the bottom positioning wheel 504 of the floating mower 5 at the raised position can push the mounting frame 501 upward, while the floating cylinder 5052 can squeeze the limiting spring 5053 and move upward, thereby ensuring that the cutting position of the floating mower 5 at different horizontal positions is the same, thus ensuring that the height of the grass after trimming is the same and neat. At the same time, the negative pressure suction fan 703 can draw grass clippings from under the vehicle body 1 into the collection box 704 through the suction pipe 702, thereby collecting grass clippings while mowing, thus achieving simultaneous mowing and collection.
[0039] The above are merely preferred embodiments of the present invention and are illustrative in nature, not restrictive. Those skilled in the art will understand that many changes, modifications, and even equivalents can be made within the spirit and scope defined by the claims of the present invention, all of which will fall within the protection scope of the present invention.
Claims
1. A device for integrated harvesting and mowing of alpine grasslands, characterized in that, include: The vehicle body (1) is used for the movement of the control device, and wheels (2) are installed at both the front and rear ends of the vehicle body (1). The dot matrix mowing assembly (3) is located at the bottom of the vehicle body (1). The dot matrix mowing assembly (3) includes a mounting plate (4) and multiple floating mowers (5). The top of the vehicle body (1) has an installation groove. The mounting plate (4) is fixedly installed in the installation groove. The floating mowers (5) are all installed at the bottom of the mounting plate (4). The multiple floating mowers (5) are arranged in two rows, alternating front and back. There are partitions between the floating mowers (5) in the same row with a length less than the effective cutting length of the floating mower (5). The floating mower (5) can adaptively adjust the cutting position according to the ground height to keep the remaining grass height the same after cutting grass at different levels.
2. The alpine grassland contour-following mowing and collection integrated device as described in claim 1, characterized in that, The floating lawnmower (5) includes a mounting frame (501), a bottom blade (502), a moving blade assembly (503), positioning wheels (504), and a floating control assembly (505). The mounting frame (501) is mounted on the bottom of the mounting plate (4) via the floating control assembly (505). The floating control assembly (505) is used to control the mounting frame (501) to move adaptively up and down at different horizontal positions. The bottom blade (502) is fixedly mounted on the bottom of the mounting frame (501). The moving blade assembly (503) is located on the bottom of the mounting plate (4). Inside the mounting bracket (501), the moving blade assembly (503) includes a motor (5031), a rotating frame (5032), and multiple hobs (5033). The motor (5031) is mounted on one side of the rotating frame (5032), the rotating frame (5032) is rotatably mounted inside the mounting bracket (501), and the rotating frame (5032) is mounted on the output end of the motor (5031). The hobs (5033) are evenly mounted on the edge of the rotating frame (5032), and the positioning wheel (504) is mounted on the bottom of the mounting bracket.
3. The alpine grassland contour-following mowing and collection integrated device as described in claim 2, characterized in that, The floating control assembly (505) includes a fixed cylinder (5051), a floating cylinder (5052), a limiting spring (5053), an upper mounting block (5054), and a lower mounting block (5055). The fixed cylinder (5051) is mounted on the bottom of the mounting plate (4) via the upper mounting block (5054). The floating cylinder (5052) is mounted on the top of the mounting frame (501) via the lower mounting block (5055). The top of the floating cylinder (5052) passes through the fixed cylinder (5051). The limiting spring (5053) is installed between the top of the floating cylinder (5052) and the upper mounting block (5054).
4. The alpine grassland contour-following mowing and collection integrated device as described in claim 3, characterized in that, A limiting ring (6) is provided on the outer edge of the top of the floating cylinder (5052), and the limiting ring (6) is locked inside the fixed cylinder (5051).
5. The alpine grassland contour-following mowing and collection integrated device as described in claim 2, characterized in that, A collection component (7) is provided on the top of the vehicle body (1), which is used to collect the cut grass clippings.
6. The alpine grassland contour-following mowing and collection integrated device as described in claim 5, characterized in that, The collection assembly (7) includes a fixed shell (701), two suction pipes (702), a negative pressure fan (703), and a collection box (704). The fixed shell (701) is fixedly installed on the top of the vehicle body (1), and the two suction pipes (702) are installed at the bottom of the fixed shell (701). Two through slots (8) are opened on the top of the vehicle body (1) and the mounting plate (4). The suction pipes (702) are inserted into the through slots (8). The two suction pipes (702) are located on the rear side of the two rows of floating lawnmowers (5). The negative pressure fan (703) is installed in the fixed shell (701). The collection box (704) is installed on the rear side of the vehicle body (1). The collection box (704) is connected to the exhaust end of the negative pressure fan (703).
7. The alpine grassland contour-following mowing and collection integrated device as described in claim 6, characterized in that, The bottom front side of the suction pipe (702) is open, and a movable baffle (9) is rotatably installed on the bottom rear side of the suction pipe (702).
8. The alpine grassland contour-following mowing and collection integrated device as described in claim 6, characterized in that, The top of the fixed shell (701) is equipped with a dustproof shell (10), and the negative pressure suction fan (703) is installed inside the dustproof shell (10).
9. The alpine grassland contour-following mowing and collection integrated device as described in claim 2, characterized in that, The vehicle body (1) is equipped with a handrail (11) on the rear side, and the handrail (11) is covered with an anti-slip sleeve (12).