A damping structure and an unmanned three-wheel sweeper
Patent Information
- Application Number
- CN202522505458.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-25
- Publication Date
- 2026-09-22
- Estimated Expiration
- 2035-11-25
AI Technical Summary
[0003]传统无人驾驶三轮清扫车的结构中，轮胎通过刚性机械结构与车架直接连接，路面凸起、坑洼产生的激励会直接传递至车架，长期震动易造成电气连接件松动、接触不良，且上置的减速机与转向器会直接承受冲击载荷，缩短核心部件使用寿命；人工驾驶清扫车底盘高度较高，其减振器多采用纵向布置方式，占用较大纵向空间；而无人驾驶清扫车为保证清扫装置贴地作业，需采用低底盘设计，若是沿用人工驾驶清扫车中的减振结构，则减振结构的空间需求与安装形式无法适配人工驾驶清扫车的尺寸结构，导致减振效果不佳或装配冲突
[0017]提供一种减振结构和无人驾驶三轮清扫车，该减振结构包括：转向连接板、转动轴、摆动臂、减振器和固定悬臂，通过减振器、转动轴和固定悬臂依次转动连接于摆动臂，固定悬臂与摆动臂的转动连接为摆动臂提供了稳固的支点，减振器与摆动臂的转动连接则形成弹性约束，且减振器与摆动臂的连接点相较于转动轴与摆动臂的连接点远离固定悬臂，这一设计通过杠杆原理可显著提升减振效率：以固定悬臂与摆动臂的连接点为支点，当无人驾驶三轮清扫车遇到颠簸时，减振器伸缩以缓冲震动时，车轮端对应的跳动行程小于减振器的伸缩量，这种“减振器大伸缩、车轮小跳动”的特性，既能让减振器充分吸收震动能量，又能有效控制车轮的运动幅度，避免其因颠簸出现过度偏移或晃动，既保证了车轮与地面的持续贴合以保障清扫效果，又避免了车身侧倾或偏移，为无人驾驶清扫车的自主行驶导航精度提供稳定基础。
Smart Images
Figure CN224782235U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of vibration reduction device technology, and in particular to a vibration reduction structure and an unmanned three-wheeled sweeper. Background Technology
[0002] As a core piece of equipment in smart sanitation, the unmanned three-wheeled sweeper, with its flexible steering performance and compact body structure, is widely used in cleaning operations in narrow spaces such as residential areas, campuses, and pedestrian streets. The front wheel shock absorption structure, a key component of the sweeper's driving system, directly affects driving stability and equipment reliability. It not only needs to buffer the impact of road bumps on the vehicle body but also ensure stable contact between the sweeping device and the ground to guarantee cleaning effectiveness. Simultaneously, it must provide a stable working environment for the vehicle's precision sensors and control system, preventing equipment malfunctions caused by vibration.
[0003] In the structure of traditional driverless three-wheeled sweepers, the tires are directly connected to the frame through a rigid mechanical structure. The excitation generated by road bumps and potholes is directly transmitted to the frame. Long-term vibration can easily cause electrical connections to loosen and make poor contact. In addition, the upper-mounted reducer and steering gear will directly bear the impact load, shortening the service life of core components. Manually driven sweepers have a high chassis, and their shock absorbers are mostly arranged longitudinally, occupying a large longitudinal space. However, in order to ensure that the sweeping device operates close to the ground, driverless sweepers need to adopt a low chassis design. If the shock absorber structure of manually driven sweepers is used, the space requirements and installation method of the shock absorber structure cannot be adapted to the size and structure of manually driven sweepers, resulting in poor shock absorption or assembly conflicts. Utility Model Content
[0004] The purpose of this utility model is to provide a vibration reduction structure and an unmanned three-wheeled sweeper. The vibration reduction structure is compact, occupies little longitudinal space, has a good vibration reduction effect, and the unmanned three-wheeled sweeper has high driving stability.
[0005] To achieve this objective, the present invention adopts the following technical solution:
[0006] On one hand, a vibration damping structure is provided for front wheel vibration damping of an unmanned three-wheeled sweeper, including: a steering connecting plate, a rotating shaft, a swing arm, a shock absorber, and a fixed cantilever. The steering connecting plate is used to connect to the steering shaft of the unmanned three-wheeled sweeper; the rotating shaft is used to pass through the axle of the wheel and is rotatably connected to the wheel; the swing arm is rotatably connected to the rotating shaft; one end of the shock absorber is detachably connected to the steering connecting plate, and the other end of the shock absorber is rotatably connected to the swing arm; one end of the fixed cantilever is fixedly connected to the steering connecting plate, and the other end of the fixed cantilever is rotatably connected to the swing arm, and the shock absorber, the rotating shaft, and the fixed cantilever are rotatably connected to the swing arm in sequence.
[0007] Preferably, there are two shock absorbers, two fixed cantilever arms, and two swing arms. The two swing arms are rotatably connected to both ends of the rotating shaft. The two shock absorbers extend axially along the steering shaft and are arranged parallel to each other on both sides of the wheel end face. One end of each shock absorber is detachably connected to the steering connecting plate, and the other end of each shock absorber is rotatably connected to the corresponding swing arm. The two fixed cantilever arms are arranged parallel to each other on both sides of the wheel end face, and the fixed cantilever arms and the shock absorbers located on the same side end face of the wheel are arranged parallel to each other along the wheel radial direction. One end of each fixed cantilever arm is fixedly connected to the steering connecting plate.
[0008] Preferably, the steering connecting plate 1 has a first mounting surface 11 and a second mounting surface 12 arranged opposite to each other. The second mounting surface 12 is closer to the wheel 7 than the first mounting surface 11. The steering connecting plate 1 is provided with a mounting hole 13, through which the steering shaft 6 of the unmanned three-wheeled sweeper can pass and be fixed relative to the inner wall of the mounting hole 13. Two shock absorber mounting parts 14 are formed by extending from one end of the steering connecting plate 1 toward the first mounting surface 11. The shock absorber mounting parts are provided with threaded holes. Two cantilever mounting parts 15 are formed by extending from the other end of the steering connecting plate 1 toward the second mounting surface 12. Each cantilever mounting part 15 is detachably connected to a fixed ear plate 16. The two fixed cantilever arms 5 are fixedly connected to the two fixed ear plates 16 one-to-one.
[0009] Preferably, the swing arm includes a first swing part and a second swing part that are fixedly connected. The end of the first swing part away from the second swing part is rotatably connected to a shock absorber. The connection between the first swing part and the second swing part is rotatably connected to a rotating shaft. The end of the second swing part away from the first swing part is rotatably connected to a fixed cantilever.
[0010] Preferably, the first swinging part is a swing rod, the second swinging part is an ear plate, the ear plate is fixedly connected to the swing rod, and the ear plate is provided with a through hole. The vibration damping structure also includes a first pin, which passes through the through hole and is fixedly connected to the ear plate. The fixed cantilever is rotatably connected to the first pin.
[0011] Preferably, the swing arm further includes a connecting tube, which is fixedly connected to the connection between the ear plate and the swing rod, and the rotating shaft passes through the connecting tube and can rotate relative to the inner wall of the connecting tube.
[0012] Preferably, the swing arm further includes a connecting plate, which is fixedly connected to the end of the swing arm away from the ear plate, and a second pin is fixedly connected to the connecting plate, and the shock absorber is rotatably connected to the second pin.
[0013] Preferably, the vibration damper includes a vibration damping spring and a damper, with the damper passing through the vibration damping spring.
[0014] Preferably, the fixed cantilever is welded to the steering connection plate.
[0015] On the other hand, an unmanned three-wheeled sweeper is provided, including: a steering shaft, a sweeping device, wheels, a frame, and a vibration damping structure of any of the above technical solutions. The sweeping device is used to sweep dust or fallen leaves, the steering shaft can drive the wheels to turn, the vibration damping structure is connected between the steering shaft and the wheels, and the frame is fixedly connected to the steering connection plate of the vibration damping structure.
[0016] The beneficial effects of this utility model are as follows:
[0017] A vibration damping structure and an unmanned three-wheeled sweeper are provided. The vibration damping structure includes a steering connection plate, a rotating shaft, a swing arm, a shock absorber, and a fixed cantilever. The shock absorber, rotating shaft, and fixed cantilever are sequentially rotatably connected to the swing arm. The rotatable connection between the fixed cantilever and the swing arm provides a stable fulcrum for the swing arm, while the rotatable connection between the shock absorber and the swing arm forms an elastic constraint. Furthermore, the connection point between the shock absorber and the swing arm is farther from the fixed cantilever than the connection point between the rotating shaft and the swing arm. This design significantly improves vibration damping efficiency through the lever principle: the fixed cantilever and the swing arm... The boom connection point serves as the fulcrum. When the unmanned three-wheeled sweeper encounters bumps, the shock absorber extends and retracts to buffer the vibration. The corresponding bounce at the wheel end is less than the extension and retraction of the shock absorber. This characteristic of "large extension and retraction of the shock absorber and small bounce of the wheel" allows the shock absorber to fully absorb vibration energy and effectively control the movement amplitude of the wheel, preventing it from excessively deviating or swaying due to bumps. This ensures that the wheel maintains continuous contact with the ground to guarantee the sweeping effect and avoids the vehicle body from tilting or deviating, providing a stable foundation for the autonomous driving navigation accuracy of the unmanned sweeper. Attached Figure Description
[0018] Figure 1 This is a schematic diagram of the vibration reduction structure provided by this utility model;
[0019] Figure 2 This is a schematic diagram of the swing arm of the vibration reduction structure provided by this utility model;
[0020] Figure 3 This is a schematic diagram of the steering connection plate of the vibration reduction structure provided by this utility model.
[0021] In the picture:
[0022] 1. Steering connecting plate; 11. First mounting surface; 12. Second mounting surface; 13. Mounting hole; 14. Shock absorber mounting part; 15. Cantilever mounting part; 16. Fixing ear plate;
[0023] 2. Rotating shaft;
[0024] 3. Swing arm; 31. First swing part; 32. Second swing part; 321. Through hole; 33. First pin; 34. Connecting pipe; 35. Connecting plate; 36. Second pin;
[0025] 4. Vibration damper; 41. Vibration damping spring; 42. Damper;
[0026] 5. Fixed cantilever; 6. Steering shaft; 7. Wheel. Detailed Implementation
[0027] 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.
[0028] 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.
[0029] 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.
[0030] In the description of this embodiment, the terms "upper," "lower," "left," and "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.
[0031] On one hand, a vibration damping structure is provided for front wheel vibration damping of an unmanned three-wheeled sweeper, including: a steering connecting plate 1, a rotating shaft 2, a swing arm 3, a shock absorber 4, and a fixed cantilever 5. The steering connecting plate 1 is used to connect to the steering shaft 6 of the unmanned three-wheeled sweeper; the rotating shaft 2 is used to pass through the axle of the wheel 7 and is rotatably connected to the wheel 7; the swing arm 3 is rotatably connected to the rotating shaft 2; one end of the shock absorber 4 is detachably connected to the steering connecting plate 1, and the other end of the shock absorber 4 is rotatably connected to the swing arm 3; one end of the fixed cantilever 5 is fixedly connected to the steering connecting plate 1, and the other end of the fixed cantilever 5 is rotatably connected to the swing arm 3, and the shock absorber 4, the rotating shaft 2, and the fixed cantilever 5 are rotatably connected to the swing arm 3 in sequence.
[0032] With this configuration, the shock absorber 4, rotating shaft 2, and fixed cantilever 5 are sequentially rotatably connected to the swing arm 3. The rotatable connection between the fixed cantilever 5 and the swing arm 3 provides a stable fulcrum for the swing arm 3, while the rotatable connection between the shock absorber 4 and the swing arm 3 forms an elastic constraint. Furthermore, the connection point between the shock absorber 4 and the swing arm 3 is farther from the fixed cantilever 5 than the connection point between the rotating shaft 2 and the swing arm 3. This design significantly improves vibration damping efficiency through the lever principle: using the connection point between the fixed cantilever 5 and the swing arm 3 as the fulcrum, when the unmanned three-wheeled vehicle... When the sweeper encounters bumps, the shock absorber 4 extends and retracts to buffer the vibration. The corresponding bounce at the wheel 7 end is less than the extension and retraction of the shock absorber 4. This characteristic of "large extension and retraction of the shock absorber 4 and small bounce of the wheel 7" allows the shock absorber 4 to fully absorb vibration energy and effectively control the movement amplitude of the wheel 7, preventing it from excessively deviating or shaking due to bumps. This ensures that the wheel 7 is in continuous contact with the ground to guarantee the cleaning effect, and also avoids the vehicle body from tilting or deviating, providing a stable foundation for the autonomous driving navigation accuracy of the unmanned sweeper.
[0033] Meanwhile, the shock absorber 4, the rotating shaft 2, and the fixed cantilever 5 are arranged in an orderly manner along the length of the swing arm 3, avoiding excessive occupation of longitudinal space. Specifically, the fixed cantilever 5 and the shock absorber 4 extend from the steering connection plate 1 to both ends of the swing arm 3, and the rotating shaft 2 is located between the two to connect the wheel 7, forming an overall layout that is "laterally dispersed and longitudinally compact". This design does not require a large vertical space like traditional longitudinally arranged shock absorber structures, perfectly adapting to the space constraints of low chassis, while reserving sufficient installation space for other components such as sweeping devices and vehicle sensors, achieving an efficient balance between function and layout.
[0034] One end of the shock absorber 4 is detachably connected to the steering connecting plate 1, and the other end of the shock absorber 4 is rotatably connected to the swing arm 3, which facilitates the disassembly and assembly of the shock absorber 4 and reduces the difficulty and time cost of replacing or repairing the shock absorber 4.
[0035] Specifically, the shock absorber 4 includes a damping spring 41 and a damper 42, with the damper 42 passing through the damping spring 41. The damping spring 41 quickly responds to road impacts, while the damper 42 prevents continuous vibration, providing a more stable working environment for precision on-board equipment.
[0036] Optionally, two shock absorbers 4, two fixed cantilever arms 5, and two swing arms 3 are provided. The two swing arms 3 are rotatably connected to the two ends of the rotating shaft 2. The two shock absorbers 4 extend along the axial direction of the steering shaft 6 and are arranged parallel to each other on both sides of the wheel 7. One end of each shock absorber 4 is detachably connected to the steering connecting plate 1, and the other end of each shock absorber 4 is rotatably connected to the corresponding swing arm 3. The two fixed cantilever arms 5 are arranged parallel to each other on both sides of the wheel 7, and the fixed cantilever arms 5 and the shock absorbers 4 located on the same side of the wheel 7 are arranged parallel to each other in the radial direction of the wheel 7. One end of each fixed cantilever arm 5 is fixedly connected to the steering connecting plate 1.
[0037] With this configuration, the double swing arms 3 and double shock absorbers 4 form a symmetrical force-bearing structure, which can evenly distribute the vibration and load borne by the wheel 7 to both sides, avoiding structural deformation caused by concentrated force on one side, and improving the overall load-bearing capacity and stability of the damping system. At the same time, the shock absorbers 4 extend axially along the steering shaft 6 and are arranged close to both sides of the wheel 7 without occupying additional lateral or longitudinal space, which is highly compatible with the low chassis design. The symmetrical layout can also offset the lateral forces during vehicle operation, reducing the risk of vehicle body deviation. Through the symmetrical layout of the fixed cantilever arms 5 and shock absorbers 4 on both sides, the load borne by the steering connection plate 1 can be more even, further enhancing the structural stability of the damping structure.
[0038] Further, please refer to Figure 3 The steering connecting plate 1 has a first mounting surface 11 and a second mounting surface 12 arranged opposite to each other. The second mounting surface 12 is closer to the wheel 7 than the first mounting surface 11. The steering connecting plate 1 is provided with a mounting hole 13. The steering shaft 6 of the unmanned three-wheeled sweeper can pass through the mounting hole 13 and be fixed relative to the inner wall of the mounting hole 13. One end of the steering connecting plate 1 extends towards the first mounting surface 11 to form two shock absorber mounting parts 14. The shock absorber mounting parts 14 are provided with threaded holes. The other end of the steering connecting plate 1 extends towards the second mounting surface 12 to form two cantilever mounting parts 15. Each cantilever mounting part 15 is detachably connected to a fixed ear plate 16. The two fixed cantilever arms 5 are fixedly connected to the two fixed ear plates 16 one-to-one. With this configuration, the damper mounting part 14 extends towards the first mounting surface 11, extending the longitudinal arrangement space of the damper 4, thereby increasing the damping stroke of the damper 4 and further improving the damping effect of the damping structure; the cantilever mounting part 15 extends towards the second mounting surface 12, reducing the length of the fixed cantilever 5, thereby improving the structural strength of the fixed cantilever 5 and further improving the structural strength of the damping structure.
[0039] Preferably, the fixing ear plate 16 is bolted to the cantilever mounting part 15, which facilitates the disassembly, replacement and maintenance of the fixing cantilever 5 when it is worn or deformed.
[0040] Preferably, the fixed cantilever 5 is welded to the steering connection plate 1. Specifically, the fixed cantilever 5 is welded to the fixed ear plate 16. This arrangement further enhances the structural strength and reliability of the vibration damping structure.
[0041] Preferably, the vibration damping structure further includes bolts, which are sequentially screwed into one end of the vibration damper 4 and into the threaded holes of the vibration damper mounting portion 14. This arrangement facilitates the disassembly and replacement of the vibration damper, saving on the maintenance costs of the vibration damping structure.
[0042] Specifically, the swing arm 3 includes a first swing portion 31 and a second swing portion 32 fixedly connected. The end of the first swing portion 31 away from the second swing portion 32 is rotatably connected to the shock absorber 4. The connection between the first swing portion 31 and the second swing portion 32 is rotatably connected to the rotating shaft 2. The end of the second swing portion 32 away from the first swing portion 31 is rotatably connected to the fixed cantilever 5. Preferably, the length of the second swing portion 32 is less than the length of the first swing portion 31. The second swing portion 32 is short and compact, allowing the connection point of the fixed cantilever 5 to be close to the vehicle body, saving lateral space. The first swing portion 31 can be flexibly extended according to the installation requirements of the shock absorber 4, ensuring that its connection position with the steering connection plate 1 is reasonable. The fixed cantilever 5 and the shock absorber 4 are respectively connected to the rotating shaft 2 through two segments of swing arms 3, forming an overall "segmented and longitudinally compact" layout, which adapts to the space limitations of the low chassis of the unmanned three-wheeled sweeper, while reserving sufficient installation space for other components such as the sweeping device and vehicle sensors, achieving an efficient balance between function and layout.
[0043] Furthermore, the first swing part 31 is a swing rod, and the second swing part 32 is an ear plate. The ear plate is fixedly connected to the swing rod, and a through hole 321 is provided on the ear plate. The vibration damping structure also includes a first pin 33, which passes through the through hole 321 and is fixedly connected to the ear plate. The fixed cantilever 5 is rotatably connected to the first pin 33. Specifically, the ear plate has a triangular plate-shaped structure, and the through hole 321 is located at one corner of the triangular plate-shaped structure. This arrangement reduces the distance between the connection point of the swing arm 3 and the fixed cantilever 5 and the steering mounting plate in the longitudinal direction, reduces the required length of the fixed cantilever 5, thereby reducing the risk of breakage of the fixed cantilever 5 and improving the structural strength of the vibration damping structure.
[0044] Furthermore, the swing arm 3 also includes a connecting pipe 34, which is fixedly connected to the connection between the ear plate and the swing rod. The rotating shaft 2 passes through the connecting pipe 34 and can rotate relative to the inner wall of the connecting pipe 34. By providing the connecting pipe 34, a guiding function is provided for the installation of the rotating shaft 2, facilitating the assembly of the vibration damping structure. At the same time, the design of the connecting pipe 34 ensures that the load transmitted by the rotating shaft 2 is evenly distributed to the inner wall of the connecting pipe 34, providing stable support for the rotating shaft 2 and improving the reliability of the vibration damping structure.
[0045] Optionally, the swing arm 3 also includes a connecting plate 35, which is fixedly connected to the end of the swing arm away from the ear plate. A second pin 36 is fixedly connected to the connecting plate 35, and the shock absorber 4 is rotatably connected to the second pin 36. The arrangement of the connecting plate 35 and the second pin 36, on the one hand, further enhances the reliability of the connection, and on the other hand, reduces the assembly difficulty. The mounting holes on the connecting plate 35 can accurately position the second pin 36, and the shock absorber 4 can be assembled simply by engaging the second pin 36 with a bushing, without the need for complex machining of the swing arm, thus improving assembly efficiency.
[0046] On the other hand, an unmanned three-wheeled sweeper is provided, including: a steering shaft 6, a sweeping device, wheels 7, a frame and the above-mentioned vibration damping structure. The sweeping device is used to sweep dust or fallen leaves. The steering shaft 6 can drive the wheels 7 to turn. The vibration damping structure is connected between the steering shaft 6 and the wheels 7. The frame is fixedly connected to the steering connection plate 1 of the vibration damping structure.
[0047] 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 vibration damping structure for front wheel vibration damping of an unmanned three-wheeled sweeper, characterized in that, include: Steering connecting plate (1), the steering connecting plate (1) is used to connect with the steering shaft (6) of the unmanned three-wheeled sweeper; Rotating shaft (2), the rotating shaft (2) is used to pass through the axle of the wheel (7), and the rotating shaft (2) is used to rotatably connect to the wheel (7). A swing arm (3) is rotatably connected to the rotating shaft (2); A shock absorber (4), one end of which is detachably connected to the steering connection plate (1), and the other end of which is rotatably connected to the swing arm (3). A fixed cantilever (5) is fixedly connected at one end to the steering connection plate (1), and the other end of the fixed cantilever (5) is rotatably connected to the swing arm (3). The shock absorber (4), the rotating shaft (2) and the fixed cantilever (5) are rotatably connected to the swing arm (3) in sequence.
2. The vibration reduction structure according to claim 1, characterized in that, Two shock absorbers (4), two fixed cantilever arms (5), and two swing arms (3) are provided. The two swing arms (3) are rotatably connected to both ends of the rotating shaft (2). The two shock absorbers (4) extend along the axial direction of the steering shaft (6) and are arranged parallel to each other on both sides of the wheel (7). One end of each shock absorber (4) is detachably connected to the steering connecting plate (1). The other end of each shock absorber (4) is rotatably connected to the corresponding swing arm (3). The two fixed cantilever arms (5) are arranged parallel to each other on both sides of the wheel (7). The fixed cantilever arms (5) and the shock absorbers (4) located on the same side of the wheel (7) are arranged parallel to each other in the radial direction of the wheel (7). One end of each fixed cantilever arm (5) is fixedly connected to the steering connecting plate (1).
3. The vibration reduction structure according to claim 2, characterized in that, The steering connecting plate (1) has a first mounting surface (11) and a second mounting surface (12) arranged opposite to each other. The second mounting surface (12) is closer to the wheel (7) than the first mounting surface (11). The steering connecting plate (1) is provided with a mounting hole (13). The steering shaft (6) of the unmanned three-wheeled sweeper can pass through the mounting hole (13) and be fixed relative to the inner wall of the mounting hole (13). One side of the steering connecting plate (1) extends towards the first mounting surface (11) to form two shock absorber mounting parts (14). The shock absorber mounting parts (14) are provided with threaded holes. The other side of the steering connecting plate (1) extends towards the second mounting surface (12) to form two cantilever mounting parts (15). Each cantilever mounting part (15) is detachably connected to a fixed ear plate (16). The two fixed cantilever arms (5) are fixedly connected to the two fixed ear plates (16) in a one-to-one correspondence.
4. The vibration reduction structure according to claim 1, characterized in that, The swing arm (3) includes a first swing part (31) and a second swing part (32) fixedly connected. The end of the first swing part (31) away from the second swing part (32) is rotatably connected to the damper (4). The connection between the first swing part (31) and the second swing part (32) is rotatably connected to the rotating shaft (2). The end of the second swing part (32) away from the first swing part (31) is rotatably connected to the fixed cantilever (5).
5. The vibration reduction structure according to claim 4, characterized in that, The first swing part (31) is a swing rod, the second swing part (32) is an ear plate, the ear plate is fixedly connected to the swing rod, and the ear plate is provided with a through hole (321). The vibration damping structure also includes a first pin (33), the first pin (33) passes through the through hole (321) and is fixedly connected to the ear plate, and the fixed cantilever (5) is rotatably connected to the first pin (33).
6. The vibration reduction structure according to claim 5, characterized in that, The swing arm (3) also includes a connecting tube (34), which is fixedly connected to the connection between the ear plate and the swing rod. The rotating shaft (2) passes through the connecting tube (34) and can rotate relative to the inner wall of the connecting tube (34).
7. The vibration reduction structure according to claim 6, characterized in that, The swing arm (3) also includes a connecting plate (35), which is fixedly connected to the end of the swing rod away from the ear plate, and a second pin (36) is fixedly connected to the connecting plate (35), and the damper (4) is rotatably connected to the second pin (36).
8. The vibration reduction structure according to claim 1, characterized in that, The damper (4) includes a damping spring (41) and a damper (42), with the damper (42) passing through the damping spring (41).
9. The vibration reduction structure according to any one of claims 1-8, characterized in that, The fixed cantilever (5) is welded to the steering connection plate (1).
10. An unmanned three-wheeled sweeper, characterized in that, include: The vehicle includes a steering shaft (6), a sweeping device, a wheel (7), a frame, and a vibration damping structure as described in any one of claims 1-9. The sweeping device is used to sweep dust or fallen leaves. The steering shaft (6) can drive the wheel (7) to turn. The vibration damping structure is connected between the steering shaft (6) and the wheel (7). The frame is fixedly connected to the steering connection plate (1) of the vibration damping structure.