Double-rolling-brush structure for unmanned sweeping vehicle

Abstract

The utility model discloses a double-rolling-brush structure for an unmanned sweeping vehicle. The double-rolling-brush structure comprises a rolling brush box body, a rolling brush motor, a reversing gear assembly, a front rolling brush belt transmission assembly, a front rolling brush assembly, a rear rolling brush belt transmission assembly and a rear rolling brush assembly. The rolling brush motor and the wheels rotate in the same direction; the reversing gear assembly is connected with the rolling brush motor; the front rolling brush belt transmission assembly is connected with a front gear of the reversing gear assembly, the front rolling brush assembly is connected with the front rolling brush belt transmission assembly, and when the front gear of the reversing gear assembly rotates clockwise, the front rolling brush belt transmission assembly drives the front rolling brush assembly to rotate clockwise; the rear rolling brush belt transmission assembly is connected with a rear gear of the reversing gear assembly, the rear rolling brush assembly is connected with the rear rolling brush belt transmission assembly, and when the rear gear of the reversing gear assembly rotates anticlockwise, the rear rolling brush belt transmission assembly drives the rear rolling brush assembly to rotate anticlockwise; the front rolling brush assembly and the wheels rotate in the same direction, and the rear rolling brush assembly and the wheels rotate in opposite directions.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of cleaning vehicle, specifically, relates to a double roller brush structure for unmanned cleaning vehicle. BACKGROUND

[0002] The current unmanned cleaning vehicle in the market, when working, the self-driving system has low recognition accuracy for large garbage such as mineral water bottles, large leaves and branches, so that the large garbage is accumulated in front of the roller brush and the front baffle; when the garbage is accumulated too much, the garbage cannot enter the roller brush device and leaks out from the left and right sides of the roller brush device, so that the cleaning function is lost; in addition, even if the self-driving system recognizes the large garbage and controls the roller brush front baffle to open, since the opening and closing of the baffle is driven by an electric push rod, the opening and closing speed is slow, and the phenomenon of missed cleaning occurs, so that the cleaning effect is poor. SUMMARY

[0003] The present specification provides a double roller brush structure for unmanned cleaning vehicle to overcome at least one technical problem in the related art.

[0004] According to the embodiment of the present specification, a double roller brush structure for unmanned cleaning vehicle is provided, comprising:

[0005] The roller brush box body, the roller brush motor, the reversing gear assembly, the front roller brush belt transmission assembly, the front roller brush assembly, the rear roller brush belt transmission assembly and the rear roller brush assembly;

[0006] The roller brush motor is arranged in the same direction as the wheel and is used to provide power for the entire double roller brush structure;

[0007] The reversing gear assembly is connected with the roller brush motor, the reversing gear assembly comprises a front gear and a rear gear, and the rotation directions of the front gear and the rear gear are opposite;

[0008] The front roller brush belt transmission assembly is connected with the front gear of the reversing gear assembly, the front roller brush assembly is connected with the front roller brush belt transmission assembly, and when the front gear of the reversing gear assembly rotates clockwise, the front roller brush assembly is driven to rotate clockwise by the front roller brush belt transmission assembly;

[0009] The rear roller brush belt transmission assembly is connected with the rear gear of the reversing gear assembly, the rear roller brush assembly is connected with the rear roller brush belt transmission assembly, and when the rear gear of the reversing gear assembly rotates counterclockwise, the rear roller brush assembly is driven to rotate counterclockwise by the rear roller brush belt transmission assembly;

[0010] The front roller brush assembly rotates in the same direction as the wheel and is used to actively roll the garbage into the roller brush box body, and the rear roller brush assembly rotates in the opposite direction of the wheel and cooperates with the front roller brush assembly to throw the garbage into the garbage can.

[0011] In some alternative embodiments, the reversing gear assembly includes a first gear and a second gear that mesh with each other. The first gear is connected to the output shaft of the roller brush motor. The first gear is the front gear, and the second gear is the rear gear. When the first gear rotates clockwise, it drives the second gear to rotate counterclockwise.

[0012] In some alternative embodiments, the front roller brush belt drive assembly includes a front driving pulley, a front driven pulley, and a front drive belt connecting the front driving pulley and the front driven pulley. The front driving pulley is coaxially connected to the front gear of the reversing gear assembly, and the front driven pulley is connected to the rotating shaft of the front roller brush assembly.

[0013] In some alternative embodiments, the rear roller brush belt drive assembly includes a rear driving pulley, a rear driven pulley, and a rear drive belt connecting the rear driving pulley and the rear driven pulley. The rear driving pulley is coaxially connected to the rear gear of the reversing gear assembly, and the rear driven pulley is connected to the rotating shaft of the rear roller brush assembly.

[0014] In some alternative implementations, the front brush assembly includes a front brush shaft and a plurality of front brush bristles mounted on the front brush shaft, the front brush shaft being connected to a front brush belt drive assembly.

[0015] In some alternative implementations, the rear brush assembly includes a rear brush shaft and a plurality of rear brush bristles mounted on the rear brush shaft, the rear brush shaft being connected to a rear brush belt drive assembly.

[0016] In some alternative implementations, the brush box is provided with a waste inlet located in front of the front brush assembly for allowing waste to enter the brush box, and the brush box is also provided with a waste outlet located behind the rear brush assembly for discharging waste into the waste bin.

[0017] The beneficial effects of the embodiments in this specification are as follows: In the technical solution of this application, the front roller brush rotates in the same direction as the wheels, which can actively roll up garbage, especially large garbage such as mineral water bottles, large leaves, and branches, into the roller brush box, avoiding garbage accumulation in front of the roller brush and ensuring the continuity of garbage sweeping. The rear roller brush rotates in the opposite direction to the wheels, and works together with the front roller brush to throw the garbage into the garbage bin. The front and rear roller brushes work together to build an efficient garbage sweeping process, reducing the time that garbage stays in the sweeping process and improving sweeping efficiency. This dual roller brush structure does not require an autonomous driving system for garbage identification, nor does it require control of the opening and closing of the front baffle of the roller brush. Traditional sweepers rely on autonomous driving systems to identify garbage, which has the problem of low accuracy, and the slow opening and closing speed of the baffle can easily lead to missed sweeps. This structure achieves efficient sweeping through unique mechanical design, reduces the operational requirements of the autonomous driving system, and reduces the impact of autonomous driving system failure or inaccurate identification on sweeping operations. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments or related technologies of this specification, the drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of a dual-roller brush structure for an unmanned sweeper provided in an embodiment of this specification;

[0020] Figure 2 This is a schematic diagram illustrating the working principle of the dual-roller brush structure for the unmanned sweeper provided in the embodiments of this specification.

[0021] In this diagram, 1 represents the brush housing, 2 represents the brush motor, 3 represents the reversing gear assembly, 4 represents the front brush belt drive assembly, 5 represents the front brush assembly, 6 represents the rear brush belt drive assembly, and 7 represents the rear brush assembly. Detailed Implementation

[0022] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0023] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0024] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0025] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, 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 utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0026] Figure 1 This is a schematic diagram of a dual-roller brush structure for an unmanned sweeper provided in an embodiment of this specification; Figure 2 This is a schematic diagram illustrating the working principle of the dual-roller brush structure for the unmanned sweeper provided in the embodiments of this specification.

[0027] This embodiment provides a dual-brush structure for an unmanned sweeper. The dual-brush structure includes a brush housing 1, a brush motor 2, a reversing gear assembly 3, a front brush belt drive assembly 4, a front brush assembly 5, a rear brush belt drive assembly 6, and a rear brush assembly 7. The brush motor 2 rotates in the same direction as the wheels, providing power to the entire dual-brush structure. The reversing gear assembly 3 is connected to the brush motor 2 and includes a front gear and a rear gear, with the front and rear gears rotating in opposite directions. The front brush belt drive assembly 4 is connected to the front gear of the reversing gear assembly 3, and the front brush assembly 5 is connected to the front brush belt drive assembly 4. When the front gear of wheel assembly 3 rotates clockwise, it drives the front roller brush assembly 5 to rotate clockwise via the front roller brush belt drive assembly 4. The rear roller brush belt drive assembly 6 is connected to the rear gear of the reversing gear assembly 3, and the rear roller brush assembly 7 is connected to the rear roller brush belt drive assembly 6. When the rear gear of the reversing gear assembly 3 rotates counterclockwise, it drives the rear roller brush assembly 7 to rotate counterclockwise via the rear roller brush belt drive assembly 6. The front roller brush assembly 5 rotates in the same direction as the wheel, actively drawing garbage into the roller brush box 1. The rear roller brush assembly 7 rotates in the opposite direction to the wheel, working together with the front roller brush assembly 5 to throw the garbage into the garbage bin. When the rear roller brush rotates counterclockwise, it works with the front roller brush to move the garbage along... Figure 2 Throw it into the trash can in the direction of the middle arrow.

[0028] In this application's technical solution, the components of the dual-brush structure in the unmanned sweeper work collaboratively to form a highly efficient garbage sweeping system, achieving a sweeping process that eliminates the need for complex garbage identification and baffle opening / closing operations. Specifically, the brush housing 1 provides the installation frame and garbage storage space for the entire structure, and can be equipped with garbage inlets and outlets for garbage entry and exit, respectively. The brush motor 2 rotates in the same direction as the wheels, ensuring that the power of the brush system is synchronized with the vehicle's driving power. When the vehicle starts sweeping and moves forward, the brush motor 2 operates synchronously, providing a stable power source for the entire dual-brush structure. This synchronous rotation ensures that the brushes can always perform garbage sweeping operations at an appropriate speed and rhythm during vehicle movement, improving sweeping efficiency and stability. The reversing gear assembly 3 is connected to the brush motor 2 and includes a front gear and a rear gear, with the front and rear gears rotating in opposite directions. When the brush motor 2 drives the reversing gear assembly 3, the front gear rotates clockwise, and the rear gear rotates counterclockwise. This design provides the power basis for the subsequent reverse rotation of the front and rear brush assemblies. The reversing gear assembly 3 serves as the power transmission node, converting the unidirectional motor power into two opposing power outputs to drive the front and rear roller brush assemblies respectively. The front roller brush belt drive assembly 4 is connected to the front gear of the reversing gear assembly 3, and the front roller brush assembly 5 is connected to the front roller brush belt drive assembly 4. When the front gear rotates clockwise, it drives the front roller brush assembly 5 to rotate clockwise through the transmission of the front roller brush belt drive assembly 4. Similarly, the rear roller brush belt drive assembly 6 is connected to the rear gear of the reversing gear assembly 3, and the rear roller brush assembly 7 is connected to the rear roller brush belt drive assembly 6. When the rear gear rotates counterclockwise, it drives the rear roller brush assembly 7 to rotate counterclockwise through the rear roller brush belt drive assembly 6. The belt drive assembly has advantages such as smooth transmission and shock absorption, ensuring that power can be efficiently and stably transmitted from the reversing gear assembly to the roller brush assembly, reducing energy loss and component wear during power transmission. The front roller brush assembly 5 rotates in the same direction as the wheel; during vehicle movement, the front roller brush assembly 5 rotates clockwise. When encountering trash, the front roller brush actively draws it into the brush housing 1 using the forward thrust and friction generated by its rotation. Especially for large items like mineral water bottles, large leaves, and branches, the front roller brush assembly 5 can smoothly draw them in, preventing trash from accumulating in front of the brush. This active trash-drawing method significantly improves cleaning efficiency and reduces the problem of cleaning function loss due to trash accumulation compared to existing technologies that rely on an autonomous system to identify trash and then control the front windshield to open. The rear roller brush assembly 7 rotates counter-clockwise, opposite to the wheels. When working together with the clockwise rotating front roller brush assembly 5, the rear roller brush assembly 7 uses the backward force generated by its rotation to throw the trash drawn into the brush housing 1 by the front roller brush assembly 5 into the trash can.The coordinated operation of the front and rear roller brush components forms an efficient garbage cleaning process. The entire process, from garbage roll-in to throwing, does not require complicated garbage identification and baffle opening and closing operations, reducing reliance on the autonomous driving system and improving the stability and reliability of the cleaning operation.

[0029] In this technical solution, the front roller brush rotates in the same direction as the wheels, actively drawing up debris, especially large items like mineral water bottles, leaves, and branches, into the brush housing. This prevents debris from accumulating in front of the brush and ensures continuous cleaning. The rear roller brush rotates in the opposite direction to the wheels, working in conjunction with the front brush to throw debris into the trash can. The coordinated action of the front and rear roller brushes creates an efficient cleaning process, reducing the time debris spends during cleaning and improving efficiency. This dual-brush structure eliminates the need for an autonomous driving system for debris identification and control of the front brush guard opening and closing. Traditional sweepers rely on autonomous driving systems for debris identification, which suffers from low accuracy and slow guard opening and closing speeds, leading to missed areas. This structure achieves efficient cleaning through a unique mechanical design, reducing the operational requirements of the autonomous driving system and minimizing the impact of system malfunctions or inaccurate identification on cleaning operations.

[0030] Based on the technical solutions described above, some more specific technical solutions are provided below, which will be elaborated on separately.

[0031] In an optional embodiment, the reversing gear assembly 3 may include a first gear and a second gear that mesh with each other. The first gear is connected to the output shaft of the roller brush motor 2. The first gear is the front gear and the second gear is the rear gear. When the first gear rotates clockwise, it drives the second gear to rotate counterclockwise.

[0032] In this embodiment, the reversing gear assembly 3, as a key transmission component in the dual-roller brush structure of the unmanned sweeper, achieves power steering and distribution through the meshing of the first gear and the second gear. Specifically, the reversing gear assembly 3 consists of a meshing first gear and a second gear. This meshing method achieves efficient power transmission through the tight engagement between the gear teeth. The first gear is directly connected to the output shaft of the roller brush motor 2, allowing the power generated by the roller brush motor to be transmitted directly to the first gear with little or no loss. In the power transmission chain of the entire dual-roller brush structure, the first gear, due to its connection position with the motor output shaft, plays a crucial role in receiving the initial power and is defined as the front gear, responsible for further transmitting power to the transmission components related to the front roller brush assembly. When the roller brush motor 2 starts and drives the first gear to rotate, since the first gear and the second gear mesh, according to the basic principle of gear transmission, the driving gear and the driven gear rotate in opposite directions. If the first gear rotates clockwise, its teeth interact with the teeth of the second gear, forcibly pushing the second gear to rotate counterclockwise. In the dual-brush structure of the unmanned sweeper, the second gear, acting as the rear gear, provides the rear brush assembly with rotational power in the opposite direction to that of the front brush assembly through its counterclockwise rotation. This design, which achieves power steering through simple gear meshing, avoids the need for multiple motors or complex control systems to drive the front and rear brushes separately, greatly simplifying the structure and reducing costs and the risk of failure.

[0033] Meanwhile, this transmission relationship between the first gear and the second gear is the core mechanism for realizing the reverse rotation of the front and rear roller brushes. The front roller brush assembly rotates clockwise under the action of the front roller brush belt transmission assembly driven by the first gear, and is responsible for actively rolling the garbage into the roller brush box; the rear roller brush assembly rotates counterclockwise under the action of the rear roller brush belt transmission assembly driven by the second gear, and together with the front roller brush, throws the garbage into the garbage bin.

[0034] In an optional embodiment, the front roller brush belt drive assembly 4 may include a front driving pulley, a front driven pulley, and a front drive belt connecting the front driving pulley and the front driven pulley. The front driving pulley is coaxially connected to the front gear of the reversing gear assembly 3, and the front driven pulley is connected to the rotating shaft of the front roller brush assembly 5.

[0035] In this embodiment, the front roller brush belt drive assembly 4, in the dual roller brush structure of the unmanned sweeper, is used to transmit power from the reversing gear assembly 3 to the front roller brush assembly 5. It consists of a front driving pulley, a front driven pulley, and a front drive belt. Through the coordinated work of these components, efficient power transmission is achieved. Specifically, the front roller brush belt drive assembly 4 mainly consists of a front driving pulley, a front driven pulley, and a front drive belt. The front drive belt wraps around the front driving pulley and the front driven pulley, and power transmission is achieved through the friction between the belt and the pulleys. This belt drive has advantages such as smooth transmission, low noise, and belt slippage under overload conditions, thus protecting other components. The front driving pulley is coaxially connected to the front gear of the reversing gear assembly 3. This means that the front driving pulley rotates synchronously with the rotation of the front gear of the reversing gear assembly 3. When the roller brush motor 2 drives the reversing gear assembly 3, the front gear rotates clockwise, and the coaxial front drive pulley also rotates clockwise at the same speed. This connection method ensures efficient power transmission from the reversing gear assembly 3 to the front roller brush belt drive assembly 4, reducing energy loss and transmission errors during power transmission. The front driven pulley is connected to the rotating shaft of the front roller brush assembly 5. When the front drive pulley rotates under the drive of the front gear of the reversing gear assembly 3, the front drive belt moves accordingly, thereby driving the front driven pulley to rotate. Since the front driven pulley is connected to the rotating shaft of the front roller brush assembly 5, the rotation of the front driven pulley drives the rotating shaft of the front roller brush assembly 5 to rotate, thus causing the front roller brush assembly 5 to rotate clockwise. During rotation, the front roller brush assembly 5 actively rolls the garbage into the roller brush box 1, completing the first step of garbage cleaning. The front roller brush belt drive assembly 4, as the link between the reversing gear assembly 3 and the front roller brush assembly 5, ensures stable power transmission.

[0036] In an optional embodiment, the rear roller brush belt drive assembly 6 may include a rear driving pulley, a rear driven pulley, and a rear drive belt connecting the rear driving pulley and the rear driven pulley. The rear driving pulley is coaxially connected to the rear gear of the reversing gear assembly 3, and the rear driven pulley is connected to the rotating shaft of the rear roller brush assembly 7.

[0037] In this embodiment, the rear roller brush belt drive assembly 6 is a key component in the dual-roller brush structure of the unmanned sweeper, enabling power transmission to the rear roller brush assembly 7. Through the coordinated operation of the rear drive pulley, the rear driven pulley, and the rear drive belt, it transmits the power from the reversing gear assembly 3 to the rear roller brush assembly 7, allowing the rear roller brush to rotate in a specific direction. Specifically, the rear roller brush belt drive assembly 6 consists of a rear drive pulley, a rear driven pulley, and a rear drive belt. The rear drive belt wraps around the rear drive pulley and the rear driven pulley, utilizing the friction between the belt and the pulleys for power transmission. This transmission method has many advantages, such as smooth operation, shock absorption, and adaptability to changes in center distance. During operation, the rotation of the rear drive pulley drives the rear driven pulley to rotate synchronously via the rear drive belt, achieving power transmission. The rear drive pulley is coaxially connected to the rear gear of the reversing gear assembly 3. When the roller brush motor 2 drives the reversing gear assembly 3, the rear gear rotates counterclockwise. Since the rear drive pulley is coaxial with the rear gear, it also rotates counterclockwise at the same speed and direction. This coaxial connection design ensures efficient power transmission from the reversing gear assembly 3 to the rear roller brush belt drive assembly 6, minimizing energy loss and transmission errors, and ensuring that the rear roller brush assembly 7 receives stable and sufficient power. The rear driven pulley is connected to the rotating shaft of the rear roller brush assembly 7. When the rear drive pulley rotates counterclockwise under the drive of the rear gear in the reversing gear assembly 3, the rear drive belt moves accordingly, thereby driving the rear driven pulley to rotate counterclockwise. Because the rear driven pulley is connected to the rotating shaft of the rear roller brush assembly 7, the rotation of the rear driven pulley directly drives the rotating shaft of the rear roller brush assembly 7 to rotate counterclockwise, causing the rear roller brush assembly 7 to start working. During the garbage collection operation, the rear roller brush assembly 7 rotates counterclockwise, working in conjunction with the clockwise rotating front roller brush assembly 5 to throw the garbage into the garbage bin, completing the subsequent steps of garbage collection. The rear roller brush belt drive assembly 6 serves as the link connecting the reversing gear assembly 3 and the rear roller brush assembly 7.

[0038] In an optional embodiment, the front roller brush assembly 5 may include a front roller brush shaft and a plurality of front brush bristles mounted on the front roller brush shaft, and the front roller brush shaft is connected to the front roller brush belt drive assembly 4.

[0039] In this embodiment, the front roller brush assembly 5 mainly consists of a front roller brush shaft and front brush bristles, and obtains power through connection with the front roller brush belt drive assembly 4. The front roller brush shaft is the core supporting component of the front roller brush assembly 5, providing a mounting base for the front brush bristles and ensuring that the front brush bristles can work on a stable structure. Simultaneously, the front roller brush shaft is connected to the front roller brush belt drive assembly 4, responsible for receiving and transmitting power from the drive assembly, driving the entire front roller brush assembly 5 to rotate. Its material is typically a high-strength, wear-resistant metal to withstand various forces generated during the sweeping process, ensuring long-term stable operation. Multiple front brush bristles are mounted on the front roller brush shaft; they directly contact the garbage and the ground, and are key actuators for achieving the garbage entrainment function. The front brush bristles are generally made of materials with a certain degree of elasticity and wear resistance, such as nylon. Elasticity ensures that the bristles better conform to the undulations of the ground when in contact with the ground and garbage, effectively sweeping garbage from crevices and corners; wear resistance ensures that the bristles will not wear out quickly during frequent sweeping operations, extending their service life. Numerous front brush bristles are evenly distributed on the front roller brush shaft, forming a rotating surface with a large cleaning area. During rotation, this generates sufficient friction and thrust to draw debris into the roller brush housing. The front roller brush shaft is connected to the front roller brush belt drive assembly 4. The front driven pulley of the front roller brush belt drive assembly 4 is connected to the front roller brush shaft. When the front gear of the reversing gear assembly 3 drives the front roller brush belt drive assembly 4, the front driven pulley rotates, which in turn drives the front roller brush shaft to rotate. The rotation of the front roller brush shaft causes the front brush bristles mounted on it to rotate accordingly. As the vehicle moves forward, the force generated by the rotation of the front brush bristles draws debris into the roller brush housing 1. This connection method ensures that power is efficiently and stably transmitted from the roller brush motor through the reversing gear assembly and the front roller brush belt drive assembly to the front roller brush assembly, achieving automated debris cleaning.

[0040] In an optional embodiment, the rear brush assembly 7 may include a rear brush shaft and a plurality of rear brush bristles mounted on the rear brush shaft, and the rear brush shaft is connected to the rear brush belt drive assembly 6.

[0041] In this embodiment, the rear roller brush assembly 7 is an important component of the dual roller brush structure of the unmanned sweeper. It works in conjunction with the front roller brush assembly 5. This assembly mainly consists of a rear roller brush shaft and rear brush bristles, and obtains power through connection with the rear roller brush belt drive assembly 6.

[0042] The rear brush shaft is the core supporting component of the rear brush assembly 7. It provides a mounting carrier for the rear brush bristles, ensuring that they are arranged in an orderly manner and operate stably. The rear brush shaft is connected to the rear brush belt drive assembly 6, and its function is to receive and transmit power from the rear brush belt drive assembly 6, driving the entire rear brush assembly 7 to rotate. To ensure stable operation in complex cleaning environments, the rear brush shaft is typically made of high-strength, wear-resistant metal, enabling it to withstand the large torque and impact forces generated during waste disposal. Multiple rear brush bristles are mounted on the rear brush shaft. These bristles directly act on the waste and are the key actuators for achieving the waste disposal function. The rear brush bristles are generally made of materials with good elasticity and wear resistance, such as special nylon. Elasticity allows the rear brush bristles to adapt to the shape and position of the waste upon contact, effectively gripping and pushing it; wear resistance ensures that the rear brush bristles do not wear out too quickly under frequent friction with waste, maintaining good working performance and a long service life. Numerous rear brush bristles are evenly distributed on the rear roller brush shaft, forming a rotating surface capable of efficiently throwing garbage. The rear roller brush shaft is connected to the rear roller brush belt drive assembly 6, which is the power source for the operation of the rear roller brush assembly 7. The rear driven pulley of the rear roller brush belt drive assembly 6 is connected to the rear roller brush shaft. When the rear gear of the reversing gear assembly 3 drives the rear roller brush belt drive assembly 6, the rear driven pulley rotates, thereby driving the rear roller brush shaft to rotate. The rotation of the rear roller brush shaft causes the rear brush bristles mounted on it to rotate as well. When working together with the front roller brush assembly 5, the rear brush bristles use the force generated by rotation to throw the garbage that has been drawn into the roller brush box 1 by the front roller brush assembly 5 into the garbage bin. This connection method ensures that power is stably and efficiently transmitted from the roller brush motor, through the reversing gear assembly and the rear roller brush belt drive assembly, to the rear roller brush assembly, guaranteeing the smooth operation of the garbage throwing process during garbage collection.

[0043] In an optional embodiment, the roller brush box 1 is provided with a garbage inlet located in front of the front roller brush assembly 5, for allowing garbage to enter the roller brush box 1. The roller brush box 1 is also provided with a garbage outlet located behind the rear roller brush assembly 7, for throwing garbage into the garbage bin.

[0044] In this embodiment, the roller brush housing 1, as a crucial carrier of the dual-roller brush structure of the unmanned sweeper, plays a key role in the smooth operation of the waste cleaning process due to the design of its waste inlet and outlet. These inlets and outlets work in conjunction with the front and rear roller brush assemblies to ensure that waste enters the cleaning area and is properly collected. The waste inlet is located on the roller brush housing 1, in front of the front roller brush assembly 5. This location fully considers the working characteristics of the front roller brush assembly 5 and the actual needs of waste cleaning. When the front roller brush assembly 5 moves forward with the vehicle and rotates clockwise, the rotational force and forward thrust it generates guide the waste directly to the waste inlet. This layout allows the waste to enter the roller brush housing 1 naturally and smoothly during the process of being drawn in by the front roller brush, reducing the possibility of waste accumulating or scattering at the inlet. The waste inlet provides a channel for waste to enter the roller brush housing 1. During cleaning operations, whether it is fine dust particles or large debris such as mineral water bottles, large leaves, and branches, it can all enter the roller brush housing 1 through the waste inlet via the action of the front roller brush assembly 5. The size and shape of the inlet typically require careful design to ensure it can accommodate common waste while also ensuring a tight fit with the front roller brush assembly 5 to prevent blockages or leaks during entry. The waste outlet is located on the roller brush housing 1, behind the rear roller brush assembly 7. This layout matches the operation of the rear roller brush assembly 7, which rotates counter-clockwise, working in conjunction with the front roller brush assembly 5 to push waste backward within the roller brush housing 1. The outlet's position is designed so that the direction in which the rear roller brush assembly 7 pushes waste aligns with the outlet direction, facilitating smooth exit of waste from the roller brush housing 1. The waste outlet is responsible for conveying waste from the roller brush housing 1 into the waste bin. When waste is transported to the rear of the roller brush housing 1 by the combined action of the front and rear roller brush assemblies, the rotational force of the rear roller brush assembly 7 throws the waste through the outlet, allowing it to enter the waste bin for collection. The size and shape of the waste outlet also require precise design to ensure smooth waste ejection while preventing splashing or scattering during the ejection process, ensuring efficient and clean waste collection. The garbage outlet is the final step in the garbage collection process. Its proper design and effective operation ensure that garbage can be properly collected and the entire cleaning task can be completed.

[0045] This utility model relates to a dual-roller brush structure for an unmanned sweeper, which achieves efficient garbage cleaning through related mechanical design. Its working principle involves two closely related processes: power transmission and garbage cleaning. The following will describe this in conjunction with… Figure 2 Its working principle is explained in detail.

[0046] When the unmanned sweeper starts its sweeping operation and moves forward, the roller brush motor 2 rotates in the same direction as the wheels (assuming the vehicle is moving to the right, the roller brush motor rotates clockwise). The output shaft of the roller brush motor 2 drives the first gear in the reversing gear assembly 3. Since the first gear is connected to the output shaft of the roller brush motor 2, the first gear rotates clockwise. Because the first gear and the second gear in the reversing gear assembly 3 mesh with each other, according to the principle of gear transmission, the driving gear and the driven gear rotate in opposite directions. Therefore, the clockwise rotation of the first gear will drive the second gear to rotate counterclockwise. This design ensures that the power is steered during transmission, providing the power basis for the subsequent reverse rotation of the front and rear roller brush assemblies.

[0047] The front gear (i.e., the first gear) of the reversing gear assembly 3 drives the front roller brush belt drive assembly 4. The front drive pulley of the front roller brush belt drive assembly 4 is coaxially connected to the front gear. When the front gear rotates clockwise, the front drive pulley rotates clockwise synchronously. The front drive pulley drives the front driven pulley to rotate via the front drive belt, thereby driving the front roller brush assembly 5 to rotate clockwise. Similarly, the rear gear (i.e., the second gear) of the reversing gear assembly 3 drives the rear roller brush belt drive assembly 6. The rear drive pulley is coaxial with the rear gear. When the rear gear rotates counterclockwise, it drives the rear drive pulley to rotate counterclockwise. The rear drive pulley drives the rear driven pulley to rotate via the rear drive belt, driving the rear roller brush assembly 7 to rotate counterclockwise. In this way, one motor successfully achieves reverse driving of the front and rear roller brush assemblies through the reversing gear assembly and the belt drive assembly.

[0048] The front roller brush assembly 5 rotates clockwise in the same direction as the wheel. When the vehicle encounters debris such as mineral water bottles, large leaves, or branches during its movement, the front roller brush actively rolls the debris into the roller brush housing 1 using the forward thrust and friction generated by its clockwise rotation. Compared to existing technologies that require an autonomous driving system to identify debris before controlling the front windshield to open for cleaning large debris, this invention's method of actively rolling in debris avoids the problem of debris accumulating in front of the roller brush's front windshield due to the low accuracy of the autonomous driving system in identifying large debris. Because the front roller brush rotates continuously and stably, as long as debris enters its effective range, it can be smoothly rolled in, ensuring the continuity of debris cleaning and thus improving cleaning efficiency.

[0049] The rear roller brush assembly 7 rotates counterclockwise, opposite to the wheel, and works in conjunction with the clockwise rotating front roller brush assembly 5. After the front roller brush rolls the garbage into the roller brush housing 1, the rear roller brush, using the backward force generated by its counterclockwise rotation, works in conjunction with the thrust of the front roller brush to throw the garbage into the garbage bin. This coordinated operation of the front and rear roller brushes, compared to the slow opening and closing speed of the electric push rod driven baffle in the prior art, which leads to missed sweeping, can transfer garbage from the cleaning area to the garbage bin more quickly and effectively. The counterclockwise rotation of the front and rear roller brushes forms an efficient garbage conveying channel, ensuring that garbage does not leak from the left and right sides of the roller brush device, maintaining the normal operation of the cleaning function and improving the cleaning effect. At the same time, this utility model does not require an autonomous driving system for garbage identification and control of the front baffle opening and closing, reducing dependence on the autonomous driving system and the operational requirements, and reducing the impact of autonomous driving system failure or inaccurate identification on the cleaning operation.

[0050] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A dual-roller brush structure for an unmanned sweeper, characterized in that, include: The roller brush housing (1), roller brush motor (2), reversing gear assembly (3), front roller brush belt drive assembly (4), front roller brush assembly (5), rear roller brush belt drive assembly (6) and rear roller brush assembly (7); The roller brush motor (2) is configured to rotate in the same direction as the wheel, and is used to provide power for the entire double roller brush structure; The reversing gear assembly (3) is connected to the roller brush motor (2). The reversing gear assembly (3) includes a front gear and a rear gear, and the front gear and the rear gear rotate in opposite directions. The front roller brush belt drive assembly (4) is connected to the front gear of the reversing gear assembly (3), and the front roller brush assembly (5) is connected to the front roller brush belt drive assembly (4). When the front gear of the reversing gear assembly (3) rotates clockwise, the front roller brush assembly (5) is driven to rotate clockwise through the front roller brush belt drive assembly (4). The rear roller brush belt drive assembly (6) is connected to the rear gear of the reversing gear assembly (3), and the rear roller brush assembly (7) is connected to the rear roller brush belt drive assembly (6). When the rear gear of the reversing gear assembly (3) rotates counterclockwise, the rear roller brush assembly (7) is driven to rotate counterclockwise through the rear roller brush belt drive assembly (6). The front roller brush assembly (5) rotates in the same direction as the wheel and is used to actively roll the garbage into the inside of the roller brush box (1). The rear roller brush assembly (7) rotates in the opposite direction to the wheel and works together with the front roller brush assembly (5) to throw the garbage into the garbage bin.

2. The dual-roller brush structure for an unmanned sweeper according to claim 1, characterized in that, The reversing gear assembly (3) includes a first gear and a second gear that mesh with each other. The first gear is connected to the output shaft of the roller brush motor (2). The first gear is the front gear and the second gear is the rear gear. When the first gear rotates clockwise, it drives the second gear to rotate counterclockwise.

3. The dual-roller brush structure for an unmanned sweeper according to claim 1, characterized in that, The front roller brush belt drive assembly (4) includes a front driving pulley, a front driven pulley, and a front drive belt connecting the front driving pulley and the front driven pulley. The front driving pulley is coaxially connected to the front gear of the reversing gear assembly (3), and the front driven pulley is connected to the rotating shaft of the front roller brush assembly (5).

4. The dual-roller brush structure for an unmanned sweeper according to claim 1, characterized in that, The rear roller brush belt drive assembly (6) includes a rear driving pulley, a rear driven pulley, and a rear drive belt connecting the rear driving pulley and the rear driven pulley. The rear driving pulley is coaxially connected to the rear gear of the reversing gear assembly (3), and the rear driven pulley is connected to the rotating shaft of the rear roller brush assembly (7).

5. The dual-roller brush structure for an unmanned sweeper according to claim 1, characterized in that, The front roller brush assembly (5) includes a front roller brush shaft and a plurality of front brush bristles mounted on the front roller brush shaft, the front roller brush shaft being connected to the front roller brush belt drive assembly (4).

6. The dual-roller brush structure for an unmanned sweeper according to claim 1, characterized in that, The rear roller brush assembly (7) includes a rear roller brush shaft and a plurality of rear brush bristles mounted on the rear roller brush shaft, the rear roller brush shaft being connected to the rear roller brush belt drive assembly (6).

7. The dual-roller brush structure for an unmanned sweeper according to claim 1, characterized in that, The roller brush box (1) is provided with a garbage inlet, which is located in front of the front roller brush assembly (5) and is used to allow garbage to enter the inside of the roller brush box (1). The roller brush box (1) is also provided with a garbage outlet, which is located behind the rear roller brush assembly (7) and is used to throw garbage into the garbage bin.

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