A leaf sweeping machine

Abstract

This invention discloses a leaf sweeping machine, relating to the technical field of leaf cleaning. It includes a vehicle body, a rotating sweeping mechanism, a sweeping head angle adjustment mechanism, and a central rotary joint air supply mechanism. A leaf collection box is located on the rear side of the vehicle body's top, with a negative pressure fan connected to its interior at the top. Negative pressure ducts connected to the leaf collection box are located on the left and right sides of the vehicle body's front end. This invention uses a rotating sweeping head mechanism and a negative pressure fan to sweep the ground, and utilizes a hot air blower to accelerate the evaporation of moisture from the leaves, breaking down the surface tension and atmospheric pressure between the leaves and the road surface caused by moisture. This reduces the airtightness between the leaves and the road surface, thereby reducing the force exerted by atmospheric pressure on the leaves adhering to the road surface, facilitating sweeping by the sweeping head. The central rotary joint, integrated inside the rotating component, solves the problem of rotating air supply, making efficient use of the sweeping head space and resulting in a simple and reliable structure.

Description

Technical Field

[0001] This invention relates to the technical field of leaf cleaning, and specifically to a leaf sweeping machine. Background Technology

[0002] In humid environments, the moisture at the edges of fallen leaves forms an airtight water film around the leaf surface due to surface tension. Because the pressure between the leaf and the road surface is relatively low, the leaves on damp sections are pressed tightly against the road surface by atmospheric pressure, making the road extremely muddy and posing significant challenges to cleaning. The main problems are as follows: Firstly, the leaves on damp surfaces are highly adhesive, making them difficult for cleaning machines to directly lift. Cleaning personnel can only use brooms or similar tools, which not only results in a small cleaning area and high workload but also wears down the cleaning tools, reducing their lifespan. Secondly, fallen leaves on damp surfaces are widely distributed and often accumulate along potholes and low-lying areas. Over time, these accumulated leaves may mix with dust and mud, making them difficult to clean completely. If cleaning personnel do not take appropriate measures, cleaning efficiency cannot be guaranteed, and it may even lead to safety hazards. Therefore, it is necessary to design a leaf-sweeping machine that can improve cleaning efficiency under special weather and road conditions. Summary of the Invention

[0003] The purpose of this invention is to provide a leaf sweeping machine to overcome the above-mentioned defects in the prior art.

[0004] A leaf sweeping machine includes a vehicle body, a rotating sweeping mechanism, a sweeping head angle adjustment mechanism, and a central rotary joint air supply mechanism. A leaf collection box is provided on the rear side of the top of the vehicle body, and a negative pressure fan communicating with the inside of the leaf collection box is provided on the top of the leaf collection box. Negative pressure air ducts communicating with the leaf collection box are provided on the left and right sides of the front of the vehicle body, respectively.

[0005] The rotating sweeping head mechanism is located at the lower end of the negative pressure air duct and drives the sweeping components on it to work, sweeping fallen leaves under normal weather and road conditions.

[0006] The sweeping head angle adjustment mechanism is mounted on the vehicle body and is used to adjust the angle of the sweeping components, thereby adapting to the needs of leaf sweeping work under different road conditions.

[0007] The central rotary joint air supply mechanism is located on the sweeping assembly and is used to deliver hot air to the ground to sweep up fallen leaves in humid weather.

[0008] Preferably, the cleaning assembly includes a double-layer cleaning brush, a brush holder, and a rotating cleaning head. The double-layer cleaning brush is located at the bottom of the brush holder, and the rotating cleaning head is coaxially located at the top of the brush holder and connected to the brush holder via a brush holder connecting bolt.

[0009] Preferably, the cleaning head angle adjustment mechanism includes an airway integrated mounting plate and an angle adjustment mounting plate. The angle adjustment mounting plate is fixed to the vehicle body by an angle adjustment locking bolt. The angle adjustment mounting plate is inserted into the positioning groove of the airway integrated mounting plate. The airway integrated mounting plate is symmetrically provided with waist-shaped holes, and locking positioning bolts for connecting the airway integrated mounting plate and the angle adjustment mounting plate are inserted into the waist-shaped holes.

[0010] Preferably, the rotary cleaning mechanism includes a drive motor and a power input pulley. The rotary cleaning head is rotatably connected to the air duct integrated mounting plate. The inner wall of the rotary cleaning head is rotatably connected to the air duct outlet at the lower end of the negative pressure air duct through the upper and lower bearings of the negative pressure air duct on its upper and lower sides. An upper sealing ring and a lower sealing ring are respectively fitted on the upper and lower sides of the rotary cleaning head, respectively located in the upper and lower positioning grooves of the air duct integrated mounting plate. The outer wall of the rotary cleaning head is rotatably connected to the air duct integrated mounting plate through the upper and lower bearings of the cleaning head on its upper and lower sides. A power output pulley is connected to the rotary cleaning head via a spline. The drive motor is mounted on the angle adjustment mounting plate, and a power input pulley is mounted on its output shaft. The power input pulley is connected to the power output pulley via a transmission belt.

[0011] Preferably, the central rotary joint air supply mechanism includes a hot air blower and a hot air jet corrugated pipe. The hot air blower is mounted on the vehicle body and connected to the hot air inlet on the air duct integrated mounting plate through a hot air guide pipe. The hot air inlet is connected to the hot air duct vertically arranged inside the rotating cleaning head through the hot air central rotary air chamber. The bottom of the hot air duct is provided with a sealing bolt for sealing. Several hot air jet corrugated pipes are provided and evenly distributed on the brush fixing seat, and their lower ends extend into the double-layer cleaning brush. The upper end of the hot air jet corrugated pipe is connected to the rotary joint air hole on the side of the hot air duct.

[0012] Preferably, a front negative pressure box is provided in the mounting groove at the front end of the vehicle body, the front negative pressure box has an opening on its front side, and the top of the front negative pressure box is connected to the leaf collection box through a negative pressure branch pipe.

[0013] The present invention has the following advantages:

[0014] In use, this invention utilizes a rotating sweeping head mechanism driven by a motor to clean the ground with double-layered sweeping brushes. In addition to the force of the double-layered brushes, the suction of a negative pressure fan further enhances the cleaning effect. This high-intensity cyclone force sweeps relatively large or dry leaves or debris from the road surface through negative pressure ducts and a front-end negative pressure box into a leaf collection box within the sweeping machine. When cleaning leaves from wet surfaces or other special road conditions, a hot air fan in the sweeping machine generates high-temperature airflow that passes through the hot air jet wave integrated into the rotating sweeping head. The hot air jet from the nozzle acts on the damp leaves, both stirring up the leaves that are not completely adhered and raising the local temperature within the double-layered cleaning brush. This accelerates the evaporation of moisture from the leaf surface, breaks down the surface tension and atmospheric pressure between the leaves and the road surface caused by dampness, and reduces the airtightness between the leaves and the road surface. Consequently, the atmospheric pressure exerted on the leaves adhering to the road surface is reduced, making it easier for the cleaning head to sweep. The central rotary joint solves the problem of rotating air supply. The central rotary joint is integrated inside the rotating component, making reasonable use of the cleaning head space and resulting in a simple and reliable structure. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the present invention.

[0016] Figure 2 This is a schematic diagram of the front structure of the present invention.

[0017] Figure 3 This is an exploded view of the air supply mechanism and cleaning components of the central rotary joint of the present invention.

[0018] Figure 4 This is a schematic diagram of the internal structure of the air supply mechanism of the central rotary joint of the present invention.

[0019] Figure 5 This is a schematic diagram of the internal structure of the airway integrated mounting plate of the present invention.

[0020] Figure 6 This is a cross-sectional view of the air supply mechanism and cleaning component of the central rotary joint of the present invention.

[0021] The components include: 1. Vehicle body; 11. Leaf collection box; 12. Negative pressure fan; 13. Negative pressure duct; 131. Duct outlet; 2. Rotary sweeping mechanism; 21. Upper bearing of negative pressure outlet; 22. Lower bearing of negative pressure outlet; 23. Upper sealing ring; 24. Lower sealing ring; 25. Bearing on sweeping head; 26. Lower bearing on sweeping head; 27. Power output pulley; 28. Drive motor; 281. Power input pulley; 29. ​​Transmission belt; 3. Sweeping assembly; 31. Double-layer sweeping brush; 32. Brush holder; 33. Rotary sweeping head; 331. Spline. 34. Brush seat connecting bolt; 4. Cleaning head angle adjustment mechanism; 41. Angle adjustment mounting plate; 42. Angle adjustment locking bolt; 43. Air duct integrated mounting plate; 431. Upper ring positioning groove; 432. Lower ring positioning groove; 44. Locking positioning bolt; 5. Central rotary joint air supply mechanism; 51. Hot air blower; 511. Hot air guide pipe; 52. Hot air inlet; 53. Hot air central rotary air chamber; 54. Hot air duct; 55. Sealing bolt; 56. Hot air jet corrugated pipe; 57. Rotary joint air hole; 6. Front negative pressure box; 61. Negative pressure branch pipe. Detailed Implementation

[0022] The following detailed description of the embodiments, with reference to the accompanying drawings, will further illustrate the specific implementation of the present invention, in order to help those skilled in the art to have a more complete, accurate, and in-depth understanding of the concept and technical solutions of the present invention.

[0023] like Figure 1-6 As shown, the present invention provides a leaf sweeping machine, including a vehicle body 1, a rotating sweeping mechanism 2, a sweeping head angle adjustment mechanism 4, and a central rotary joint air supply mechanism 5. A leaf collection box 11 is provided on the rear side of the top of the vehicle body 1. The function of the leaf collection box 11 is to collect and store the fallen leaves collected by the negative pressure air duct 13 and the front negative pressure box 6. A negative pressure fan 12 is provided on the top of the leaf collection box 11 and communicates with its interior. The function of the negative pressure fan 12 is to provide suction from the air duct outlet 131 and the front negative pressure box 6 through the negative pressure air duct 13, thereby adding an additional suction effect to the fallen leaves on the action of the double-layer sweeping brush 31.

[0024] Negative pressure ducts 13 connected to leaf collection boxes 11 are respectively provided on the left and right sides of the front end of the vehicle body 1. A front negative pressure box 6 is provided in the mounting groove at the front end of the vehicle body 1. The front negative pressure box 6 has an opening on its front side. The top of the front negative pressure box 6 is connected to the leaf collection box 11 through a negative pressure branch pipe 61. The rotating sweeping mechanism 2 is respectively provided at the lower end of the negative pressure duct 13 and drives the sweeping component 3 on it to work, sweeping fallen leaves under normal weather and road conditions. The sweeping head angle adjustment mechanism 4 is provided on the vehicle body 1 and is used to adjust the angle of the sweeping component 3, so as to adapt to the leaf sweeping work required by different road conditions. The central rotary joint air supply mechanism 5 is provided on the sweeping component 3 and is used to deliver hot air to the ground to sweep fallen leaves in humid weather.

[0025] It should be noted that the cleaning assembly 3 includes a double-layer cleaning brush 31, a brush holder 32, and a rotating cleaning head 33. The double-layer cleaning brush 31 is located at the bottom of the brush holder 32, and the rotating cleaning head 33 is coaxially located at the top of the brush holder 32 and connected to the brush holder 32 via a brush holder connecting bolt 34.

[0026] In addition, the sweeping head angle adjustment mechanism 4 includes an air duct integrated mounting plate 43 and an angle adjustment mounting plate 41. The angle adjustment mounting plate 41 is fixed to the vehicle body 1 by an angle adjustment locking bolt 42. The angle adjustment mounting plate 41 is inserted into the positioning groove of the air duct integrated mounting plate 43. The air duct integrated mounting plate 43 is symmetrically provided with waist-shaped holes, and locking positioning bolts 44 for connecting the air duct integrated mounting plate 43 and the angle adjustment mounting plate 41 are inserted into the waist-shaped holes. The opening and closing angles of the sweeping components 3 on both sides of the vehicle body 1 and the distance between the two sweeping components 3 can be adjusted to better adapt to the leaf sweeping work required by different road conditions.

[0027] Additionally, the rotary cleaning mechanism 2 includes a drive motor 28 and a power input pulley 281. The rotary cleaning head 33 is rotatably connected to the air duct integrated mounting plate 43. The inner wall of the rotary cleaning head 33 is rotatably connected to the air duct outlet 131 at the lower end of the negative pressure air duct 13 via the upper bearing 21 and lower bearing 22 of the negative pressure air duct outlet on its upper and lower sides. The upper and lower sides of the rotary cleaning head 33 are respectively fitted with an upper sealing ring 23 and a lower sealing ring 24, which are located in the upper ring positioning groove 431 and lower ring positioning groove 432 of the air duct integrated mounting plate 43, respectively. The outer wall of the rotary cleaning head 33 is connected to the air duct outlet 13 via its upper and lower bearing 21 and lower bearing 22. The bearings 25 and 26 on the sweeping heads on both sides are rotatably connected to the air duct integrated mounting plate 43. The rotating sweeping head 33 is connected to the power output pulley 27 via spline 331. The drive motor 28 is mounted on the angle adjustment mounting plate 41 and a power input pulley 281 is mounted on its output shaft. The power input pulley 281 is connected to the power output pulley 27 via a transmission belt 29. The power input pulley 281 drives the power output pulley 27 to rotate via the transmission belt 29. The power output pulley 27 and the rotating sweeping head 33 cooperate via spline 331 to drive the double-layer sweeping brush 31 to work.

[0028] It is worth noting that the central rotary joint air supply mechanism 5 includes a hot air blower 51 and a hot air jet corrugated pipe 56. The hot air blower 51 is mounted on the vehicle body 1 and connected to the hot air inlet 52 on the air duct integrated mounting plate 43 via a hot air guide pipe 511. The hot air inlet 52 is connected to the vertically arranged hot air duct 54 inside the rotating cleaning head 33 via the hot air central rotary air chamber 53. The bottom of the hot air duct 54 is provided with a sealing bolt 55 for sealing. Several hot air jet corrugated pipes 56 are provided and evenly distributed on the brush fixing seat 32, with their lower ends extending into the double-layer cleaning brush 31. The upper end of the hot air jet corrugated pipe 56 is connected to the rotary joint on the side of the hot air duct 54. The head air vent 57 is connected. The function of the hot air blower 51 is to heat the air to produce hot air, and to blow the hot air close to the ground through the hot air guide pipe 511, the hot air inlet 52, the hot air central rotating air channel 53 and the hot air jet corrugated pipe 56. The hot air not only blows the leaves that are not completely attached, but also raises the local ambient temperature in the double-layer sweeping brush 31, accelerates the evaporation of moisture and reduces the air tightness between the leaves and the road surface, thereby reducing the atmospheric pressure on the leaves adhering to the road surface, so that the leaves are cleaned. The central rotating joint is set to solve the function of rotating air supply. The central rotating joint is integrated inside the rotating component, making reasonable use of the sweeping head space and having a simple and reliable structure.

[0029] Detailed implementation methods and principles:

[0030] In practical application, the negative pressure fan 12 and drive motor 28 are started, and the handle on the vehicle body 1 is pushed to move the device to the area of ​​fallen leaves to be cleaned. The power input pulley 281 on the output shaft of the drive motor 28 drives the rotating cleaning head 33 to rotate via the transmission belt 29. The double-layer cleaning brush 31 on the rotating cleaning head 33 cleans the fallen leaves on the ground, and the fallen leaves are collected in the fallen leaf collection box 11 through the negative pressure air duct 13 and the front negative pressure box 6. When the fallen leaves are wet and stick to the ground and are difficult to clean, The hot air blower 51 is started, and the hot air blower 51 inputs hot air through the hot air guide pipe 511 into the hot air central rotating air chamber 53 on the air duct integrated mounting plate 43. The hot air is blown out from the hot air jet corrugated pipe 56 through the hot air duct 54 in the rotating sweeping head 33 and acts on the damp fallen leaves. The hot air not only blows the fallen leaves that are not completely attached to the ground, but also raises the local ambient temperature in the double-layer sweeping brush 31, which accelerates the evaporation of moisture and reduces the air tightness between the fallen leaves and the road surface, making it easier to clean up the damp fallen leaves.

[0031] The present invention has been described above by way of example with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any non-substantial improvements made using the concept and technical solution of the present invention, or the direct application of the present invention and technical solution to other situations without modification, are all within the protection scope of the present invention.

Claims

1. A leaf sweeping machine, characterized by: The vehicle includes a vehicle body (1), a rotating cleaning mechanism (2), a cleaning head angle adjustment mechanism (4), and a central rotary joint air supply mechanism (5). A leaf collection box (11) is provided on the rear side of the top of the vehicle body (1). A negative pressure fan (12) communicating with the inside of the leaf collection box (11) is provided on the top of the leaf collection box (11). Negative pressure air ducts (13) communicating with the leaf collection box (11) are provided on the left and right sides of the front end of the vehicle body (1). The rotary sweeping mechanism (2) is located at the lower end of the negative pressure air duct (13) and drives the sweeping assembly (3) on it to work, sweeping fallen leaves under normal weather and road conditions; The sweeping head angle adjustment mechanism (4) is located on the vehicle body (1) and is used to adjust the angle of the sweeping assembly (3) to adapt to the leaf sweeping work required by different road conditions; The central rotary joint air supply mechanism (5) is located on the cleaning assembly (3) and is used to deliver hot air to the ground to clean fallen leaves in humid weather. The cleaning assembly (3) includes a double-layer cleaning brush (31), a brush holder (32), and a rotating cleaning head (33). The double-layer cleaning brush (31) is located at the bottom of the brush holder (32), and the rotating cleaning head (33) is coaxially located at the top of the brush holder (32) and connected to the brush holder (32) via a brush holder connecting bolt (34). The cleaning head angle adjustment mechanism (4) includes an air passage integrated mounting plate (43) and an angle adjustment mounting plate (41). The angle adjustment mounting plate (41) is fixed to the vehicle body (1) by an angle adjustment locking bolt (42). The angle adjustment mounting plate (41) is inserted into the positioning groove of the air passage integrated mounting plate (43). The air passage integrated mounting plate (43) is symmetrically provided with waist-shaped holes, and locking positioning bolts (44) for connecting the air passage integrated mounting plate (43) and the angle adjustment mounting plate (41) are inserted into the waist-shaped holes. The rotary cleaning mechanism (2) includes a drive motor (28) and a power input pulley (281). The rotary cleaning head (33) is rotatably connected to the air duct integrated mounting plate (43). The inner wall of the rotary cleaning head (33) is rotatably connected to the air duct outlet (131) at the lower end of the negative pressure air duct (13) through the upper bearing (21) and lower bearing (22) of the negative pressure air outlet on its upper and lower sides. The upper and lower sides of the rotary cleaning head (33) are respectively fitted with an upper sealing ring (23) and a lower sealing ring (24). The upper sealing ring (23) and the lower sealing ring (24) are respectively located on the air duct integrated mounting plate (43). In the upper ring positioning groove (431) and lower ring positioning groove (432) of 43), the outer wall of the rotating cleaning head (33) is rotatably connected to the air passage integrated mounting plate (43) through the cleaning head bearing (25) and the cleaning head lower bearing (26) on its upper and lower sides. The rotating cleaning head (33) is connected to the power output pulley (27) through the spline (331). The drive motor (28) is mounted on the angle adjustment mounting plate (41) and the power input pulley (281) is mounted on its output shaft. The power input pulley (281) is connected to the power output pulley (27) through the transmission belt (29). The central rotary joint air supply mechanism (5) includes a hot air blower (51) and a hot air jet corrugated pipe (56). The hot air blower (51) is mounted on the vehicle body (1) and connected to the hot air inlet (52) on the air duct integrated mounting plate (43) through the hot air guide pipe (511). The hot air inlet (52) is connected to the hot air duct (54) vertically arranged inside the rotating cleaning head (33) through the hot air central rotary air chamber (53). The bottom of the hot air duct (54) is provided with a sealing bolt (55) for sealing. The hot air jet corrugated pipe (56) is provided with several and evenly distributed on the brush fixing seat (32) and its lower end extends into the double-layer cleaning brush (31). The upper end of the hot air jet corrugated pipe (56) is connected to the rotary joint air hole (57) on the side of the hot air duct (54).

2. A leaf sweeping machine according to claim 1, characterized in that: The front negative pressure box (6) is provided in the mounting groove at the front end of the vehicle body (1). The front negative pressure box (6) has an opening on the front side. The top of the front negative pressure box (6) is connected to the leaf collection box (11) through a negative pressure branch pipe (61).

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