Chassis system and mowing equipment

Abstract

The utility model is suitable for the technical field of mobile equipment, and provides a chassis system and mowing equipment. The chassis system comprises a movable chassis and a steering assembly, the movable chassis is used for moving on the ground, and the steering assembly comprises a steering part rotationally arranged on the movable chassis; the lifting part can move in the direction close to or away from the ground; the first driving part is fixedly connected with one of the movable chassis and the steering part, and is rotationally connected with the other one so as to drive the movable chassis and the steering part to rotate relatively; and the second driving part is fixedly connected with one of the steering part and the lifting part and is in driving connection with the other one so as to drive the steering part and the lifting part to move relatively. According to the chassis system, a differential steering mechanism of a traditional movable chassis is abandoned, the lifting piece serves as a supporting point, and in-situ or small-radius steering of the movable chassis is achieved; and the steering radius is greatly reduced.

Description

Technical Field

[0001] This application belongs to the field of mobile device technology, and more specifically, relates to a chassis system and lawn mowing equipment. Background Technology

[0002] Lawn mowing equipment is a type of mechanical equipment used to trim lawns, grasslands, and other vegetation. It uses a power-driven cutting device to cut grass to a suitable length in order to beautify the environment and maintain the healthy growth of the grassland.

[0003] In related technologies, lawn mowing equipment includes a chassis system, a power system, and a cutting system. The chassis system not only provides a platform for the power and cutting systems but also enables the lawn mowing equipment to move freely on the lawn. The chassis system includes the chassis body, two drive wheels, and two follower wheels. The two drive wheels are mounted opposite each other on the chassis body and use a differential mechanism to steer the chassis body. The two follower wheels are omnidirectional or caster wheels and are mounted opposite each other on the chassis body.

[0004] Although the aforementioned chassis system can achieve steering, the drive wheels will experience significant relative slippage with the lawn surface. This not only easily leaves tire tracks on the lawn, affecting its aesthetics, but may also cause substantial damage to the turf, which is detrimental to the healthy growth of the lawn. Utility Model Content

[0005] The purpose of this application is to provide a chassis system and lawn mowing equipment, which aims to solve the technical problem in the related art that the chassis system and the lawn surface will have a large relative slippage.

[0006] To achieve the above objectives, according to one aspect of this application, a chassis system is provided, including a mobile chassis and a steering assembly. The mobile chassis is used to move on the ground. The steering assembly includes: a steering member rotatably disposed on the mobile chassis; a lifting member capable of moving in a direction toward or away from the ground; a first drive member fixedly connected to one of the mobile chassis and the steering member, and rotatably connected to the other, to drive the mobile chassis and the steering member to rotate relative to each other; and a second drive member fixedly connected to one of the steering member and the lifting member, and drivenly connected to the other, to drive the steering member and the lifting member to move relative to each other. After the lifting member moves to contact the ground, the steering member and the mobile chassis can move in a direction away from the ground under the drive of the second drive member, and the mobile chassis can rotate relative to the steering member and the ground under the drive of the first drive member.

[0007] Optionally, the first driving component includes a rotating shaft and a first driving structure. The rotating shaft is fixedly connected to one of the mobile chassis and the steering component, and rotatably connected to the other. The first driving structure is drivenly connected to the rotating shaft to drive the rotating shaft to rotate.

[0008] Optionally, the first driving structure includes a first transmission gear and a first driving body. The first transmission gear is driven to rotate the rotating shaft and is used to drive the rotating shaft to rotate. The first driving body is driven to rotate the first transmission gear and is used to drive the first transmission gear to rotate.

[0009] Optionally, the first drive structure further includes a second transmission gear, which is fixed to the rotating shaft and meshes with the first transmission gear.

[0010] Optionally, the first drive unit is mounted on the mobile chassis.

[0011] Optionally, the second driving component includes a lead screw and a second driving structure. The lead screw is fixedly connected to one of the steering component and the lifting component, and threadedly engaged with the other. The second driving structure is drivenly connected to the lead screw and is used to drive the lead screw to rotate.

[0012] Optionally, the second drive structure includes a third transmission gear and a second drive body. The third transmission gear is driven to connect with the lead screw and is used to drive the lead screw to rotate. The second drive body is driven to connect with the third transmission gear and is used to drive the third transmission gear to rotate.

[0013] Optionally, the second drive structure also includes a fourth transmission gear, which is fixed to the lead screw and meshes with the third transmission gear.

[0014] Optionally, the second drive unit is located on the steering component.

[0015] Optionally, one of the steering component and the lifting component is provided with a limiting protrusion, and the other is provided with a limiting recess. The lifting component passes through the limiting protrusion into the limiting recess to restrict the relative rotation of the steering component and the lifting component, and slides on the steering component by sliding the limiting protrusion in the limiting recess.

[0016] Optionally, the steering component includes a steering support structure and a steering connection structure, with a limiting protrusion or a limiting recess disposed on the steering support structure; the steering connection structure is connected to the steering support structure, and the first driving component is fixedly connected to one of the mobile chassis and the steering connection structure, and rotatably connected to the other; the lifting component includes a lifting support structure and a lifting connection structure, with a limiting recess or a limiting protrusion disposed on the lifting support structure; the lifting connection structure is connected to the lifting support structure, and the second driving component is fixedly connected to one of the steering connection structure and the lifting connection structure, and drivably connected to the other.

[0017] Optionally, the steering support structure is a support rod, support plate, or support frame, and the steering connection structure is a connecting rod or connecting plate; the lifting support structure is a support rod, support plate, or support frame, and the lifting connection structure is a connecting rod or connecting plate.

[0018] According to another aspect of this application, a lawn mowing device is provided, including a cutting system and the aforementioned chassis system, wherein the cutting system includes a cutting element having a preset gap with the ground.

[0019] Optionally, the cutting system also includes a cutting guard, which is fixedly connected to the steering component and slidably disposed on the lifting component; the cutting component is rotatably disposed inside the cutting guard.

[0020] The beneficial effects of the chassis system provided in this application are as follows: The steering component of this application allows for flexible adjustment of the mobile chassis's attitude; when the lifting component moves to contact the ground, the second drive component drives the steering component and the mobile chassis away from the ground, and then the first drive component drives the mobile chassis to rotate relative to the ground. This chassis system abandons the traditional differential steering mechanism of mobile chassis, instead using the lifting component as a support point to achieve on-the-spot or small-radius steering of the mobile chassis; this not only significantly reduces the turning radius, avoiding excessive friction and slippage between the mobile chassis and the ground due to an excessively large turning radius, effectively protecting the integrity and aesthetics of the surface to be protected; it also allows the chassis system to turn more freely in narrow spaces or complex terrain, improving the flexibility of steering operations. Furthermore, it simplifies the structure and control logic of the chassis system and reduces its overall weight. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a side view of the assembled chassis system and cutting system provided in an embodiment of this application;

[0023] Figure 2 This is a front view of the chassis system and cutting system assembled after concealing the moving wheels, as provided in an embodiment of this application.

[0024] Figure 3 A schematic diagram of the assembled chassis system and cutting system with the hidden moving wheels provided in an embodiment of this application;

[0025] Figure 4 A front view schematic diagram of the steering component provided in an embodiment of this application;

[0026] Figure 5 for Figure 1 Enlarged view of point A in the middle;

[0027] Figure 6 This is a schematic diagram of the steering component provided in an embodiment of this application;

[0028] Figure 7 This is a schematic diagram of the assembled cutting system and steering assembly provided in an embodiment of this application;

[0029] Figure 8 An exploded view of the assembled steering component and lifting component provided in an embodiment of this application;

[0030] Figure 9 This is a schematic diagram of the cutting system provided in the embodiments of this application;

[0031] The details of the reference numerals used in the above figures are as follows:

[0032] 100. Mobile chassis; 110. Chassis body; 120. Casters;

[0033] 200. Steering assembly; 210. Steering component; 211. Steering support structure; 2111. Limiting protrusion; 212. Steering connection structure;

[0034] 220. Lifting component; 221. Lifting support structure; 2211. Limiting recess; 222. Lifting connection structure;

[0035] 230, First driving component; 231, Rotating shaft; 232, First driving structure; 2321, First transmission gear; 2322, First driving body; 2323, Second transmission gear;

[0036] 240. Second driving component; 241. Lead screw; 242. Second driving structure; 2421. Third transmission gear; 2422. Second driving body; 2423. Fourth transmission gear;

[0037] 300. Cutting system; 310. Cutting component; 320. Cutting guard; 330. Cutting mounting base; 340. Third drive component; 350. Linkage mechanism. Detailed Implementation

[0038] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0039] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly or indirectly on that other element. When an element is referred to as being "connected to" another element, it can be directly or indirectly connected to that other element. Unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0040] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0041] In the description of this application, unless otherwise stated, " / " indicates that the objects before and after are in an "or" relationship. For example, A / B can mean A or B. "And / or" in this application is merely a description of the relationship between the related objects, indicating that there can be three relationships. For example, A and / or B can mean: A exists alone, A and B exist simultaneously, and B exists alone. A and B can be singular or plural.

[0042] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0043] As described in the background section, lawnmowers are mechanical devices used to trim lawns, meadows, and other vegetation. They use a power-driven cutting device to cut grass to a suitable length, achieving the purpose of beautifying the environment and maintaining the healthy growth of the lawn. In related technologies, lawnmowers include a chassis system, a power system, and a cutting system. The chassis system not only provides a platform for the power and cutting systems but also enables the lawnmower to move freely on the lawn. The chassis system includes a chassis body, two drive wheels, and two follower wheels. The two drive wheels are mounted opposite each other on the chassis body and use a differential mechanism to steer the chassis body. The two follower wheels are omnidirectional or caster wheels, mounted opposite each other on the chassis body. While the chassis system can achieve steering, the drive wheels can experience significant relative slippage with the lawn surface. This not only easily leaves tire tracks on the lawn, affecting its aesthetics, but can also cause substantial damage to the turf, hindering its healthy growth.

[0044] Reference Figures 1 to 5 To address the aforementioned problems, according to one aspect of this application, an embodiment of this application provides a chassis system including a mobile chassis 100 and a steering assembly 200. The mobile chassis 100 is used to move on the ground. The steering assembly 200 includes a steering member 210, a lifting member 220, a first drive member 230, and a second drive member 240. The steering member 210 is rotatably disposed on the mobile chassis 100; the lifting member 220 is capable of moving in a direction closer to or further from the ground; the first drive member 230 is fixedly connected to one of the mobile chassis 100 and the steering member 210, and rotatably connected to the other, to drive the mobile chassis 100 and the steering member 210 to rotate relative to each other; the second drive member 240 is fixedly connected to one of the steering member 210 and the lifting member 220, and drivably connected to the other, to drive the steering member 210 and the lifting member 220 to move relative to each other.

[0045] After the lifting member 220 moves to contact the ground, the steering member 210 and the mobile chassis 100 can move away from the ground under the drive of the second driving member 240, and the mobile chassis 100 can rotate relative to the ground under the drive of the first driving member 230.

[0046] In this embodiment, the chassis system is used for lawn mowing equipment, and the ground surface is a vegetated surface such as a lawn or grass surface; it is understood that the ground surface can also be an indoor floor, a cement road surface, or an asphalt road surface; the steering member 210 rotates relative to the mobile chassis 100 by being rotatably mounted on the mobile chassis 100, and the lifting member 220 can move relative to the steering member 210. Simultaneously, the lifting member 220 is used to limit the rotation of the steering member 210 relative to the lifting member 220, so that the steering member 210 and the mobile chassis 100 can move under the drive of the second drive member 240. It is understood that the chassis system may also include a limiting member, which is disposed on one side of the lifting member 220, for limiting the rotation of the steering member 210 relative to the lifting member 220, so that the steering member 210 and the mobile chassis 100 can translate under the drive of the second drive member 240.

[0047] When the chassis system of this application needs to turn on the ground, the second drive unit 240 is first activated, which drives the lifting unit 220 to descend towards the ground. After the lifting unit 220 moves to contact the ground, the second drive unit 240 continues to operate. Since the lifting unit 220 has made contact with the ground, it will remain stationary or rotate relative to the ground. Because the second drive unit 240 can drive the steering unit 210 and the lifting unit 220 to move relative to each other, the steering unit 210 will drive the steering unit 210 and the mobile chassis 100 to rise away from the ground. After the steering unit 210 and the mobile chassis 100 leave the ground, the second drive unit 240 can stop operating.

[0048] Then the first drive component 230 is activated, which drives the steering component 210 to rotate. Since the lifting component 220 or the limiting component restricts the rotation of the steering component 210 relative to the lifting component 220, and the first drive component 230 can drive the mobile chassis 100 and the steering component 210 to rotate relative to each other, the mobile chassis 100 will rotate relative to the ground under the driving action of the first drive component 230, so that the steering action can be completed on the ground.

[0049] Once the mobile chassis 100 completes its steering maneuver on the ground (i.e., reaches the expected steering angle), the first drive unit 230 can stop operating. Then, the second drive unit 240 is activated, causing the lifting unit 220 to rise away from the ground. After the mobile chassis 100 contacts the ground, the second drive unit 240 continues to drive the lifting unit 220 away from the ground. During this process, the mobile chassis 100 will touch the ground first. After the lifting unit 220 leaves the ground, the second drive unit 240 can stop operating. Then, the first drive unit 230 can be activated, causing the steering unit 210 and the lifting unit 220 to rotate back, thus completing the steering of the entire chassis system.

[0050] The steering component 200 of this application allows for flexible adjustment of the attitude of the mobile chassis 100. When the lifting component 220 moves to contact the ground, the second drive component 240 drives the steering component 210 and the mobile chassis 100 away from the ground. Subsequently, the first drive component 230 drives the mobile chassis 100 to rotate relative to the ground. This chassis system abandons the traditional differential steering mechanism of the mobile chassis 100, instead using the lifting component 220 as a support point to achieve in-situ or small-radius steering of the mobile chassis 100. This not only significantly reduces the turning radius, avoiding excessive friction and slippage between the mobile chassis 100 and the ground due to an excessively large turning radius, effectively protecting the integrity and aesthetics of the surface to be protected, but also allows the chassis system to turn more freely in narrow spaces or complex terrain, improving the flexibility of steering operations. Furthermore, it simplifies the structure and control logic of the chassis system and reduces its overall weight.

[0051] Reference Figures 2 to 7 In one embodiment, the first driving member 230 includes a rotating shaft 231 and a first driving structure 232. The rotating shaft 231 is fixedly connected to one of the mobile chassis 100 and the steering member 210, and rotatably connected to the other. The first driving structure 232 is drivenly connected to the rotating shaft 231 and is used to drive the rotating shaft 231 to rotate.

[0052] In this embodiment, the rotating shaft 231 is coaxially arranged with the movable chassis 100 and with the steering component 210. The rotating shaft 231 is fixedly connected to one of the movable chassis 100 and the steering component 210, and rotatably connected to the other. This connection method provides a stable structure and ensures that the movable chassis 100 and the steering component 210 maintain an accurate positional relationship when rotating relative to each other, preventing misalignment or displacement during movement, thereby ensuring the stability and reliability of the entire steering assembly 200. Furthermore, decomposing the first drive component 230 into the rotating shaft 231 and the first drive structure 232 facilitates installation and maintenance.

[0053] Reference Figures 2 to 7 In one embodiment, the rotating shaft 231 is rotatably connected to the movable chassis 100 and fixedly connected to the steering component 210.

[0054] In this embodiment, the mobile chassis 100 is provided with mounting holes, and a rotating bearing (such as an angular bearing) is fixedly sleeved in the mounting holes. The rotating shaft 231 is rotatably connected to the mobile chassis 100 by being fixedly inserted into the inner ring of the rotating bearing; at the same time, the rotating shaft 231 is fixedly connected to the steering component 210 by welding, snap-fitting, or plugging. It can be understood that the rotating shaft 231 can also be rotatably connected to the steering component 210 and fixedly connected to the mobile chassis 100.

[0055] In actual operation, the mobile chassis 100 is usually equipped with various functional components. The rotating shaft 231 is designed to be rotatably connected to the mobile chassis 100, which allows the mobile chassis 100 to rotate only when turning, driven by the rotating shaft 231, and remain stationary under other working conditions. This not only helps to reduce the wear of the first drive structure 232 and the rotating shaft 231, thereby effectively extending the service life of the first drive structure 232 and the rotating shaft 231, but also reduces the energy consumption of the first drive structure 232, extends the endurance of the chassis system, and improves work efficiency.

[0056] It is understood that the steering component 210 may also have a connecting shaft integrally formed with the steering component 210, the connecting shaft being fixedly inserted into the inner ring of the rotating bearing for rotational connection with the mobile chassis 100; in this case, the first driving component 230 includes a first driving structure 232, the first driving structure 232 being drivenly connected to the connecting shaft for driving the rotating shaft 231 to rotate.

[0057] Reference Figures 2 to 7 In one embodiment, the first drive structure 232 includes a first transmission gear 2321 and a first drive body 2322. The first transmission gear 2321 is driven to rotate the rotating shaft 231 and is used to drive the rotating shaft 231 to rotate. The first drive body 2322 is driven to rotate the first transmission gear 2321.

[0058] In this embodiment, the axis of the first transmission gear 2321 is parallel to the axis of the rotating shaft 231. Transmission teeth can be fixedly surrounded on the outer circumferential surface of the rotating shaft 231. The first transmission gear 2321 can be driven to connect with the rotating shaft 231 by meshing with the transmission teeth. The first drive body 2322 is located above or below the first transmission gear 2321 and is a geared motor. The axis of the output shaft of the geared motor is perpendicular to the axis of the first transmission gear 2321, and the output shaft of the geared motor is driven to connect with the first transmission gear 2321.

[0059] After the steering component 210 and the mobile chassis 100 are off the ground, the first drive body 2322 drives the first transmission gear 2321 to rotate. Since the lifting component 220 is in contact with the ground at this time, and the lifting component 220 or the limiting component will restrict the steering component 210 from rotating relative to the lifting component 220, the first transmission gear 2321 will rotate around the circumference of the rotating shaft 231 under the action of the continuous driving force applied by the first drive body 2322.

[0060] Gear transmission features smooth transmission, high transmission precision, and high transmission efficiency. The first transmission gear 2321 is driven by the rotating shaft 231, ensuring the stability, accuracy, and high efficiency of power transmission. Furthermore, the combination of the first transmission gear 2321 and the first driving body 2322 makes the first driving structure 232 more compact, occupies less space, and is easier to install and maintain.

[0061] Reference Figures 2 to 7 In one embodiment, the first drive structure 232 further includes a second transmission gear 2323, which is fixed to the rotating shaft 231 and meshes with the first transmission gear 2321.

[0062] In this embodiment, the second transmission gear 2323 is coaxially arranged with the rotating shaft 231; the axis of the second transmission gear 2323 is parallel to and not collinear with the axis of the first transmission gear 2321. The second transmission gear 2323 is fixedly connected to the rotating shaft 231, and the first transmission gear 2321 meshes with the second transmission gear 2323. This structure increases the stability of the transmission system and facilitates the adjustment and maintenance of the entire transmission system. It is understood that the second transmission gear 2323 can also be integrally formed with the rotating shaft 231.

[0063] Reference Figures 2 to 7 In one embodiment, the first drive body 2322 is disposed on the mobile chassis 100. In this embodiment, the first drive body 2322 is fixedly mounted on the mobile chassis 100.

[0064] The first drive unit 2322 is mounted on the mobile chassis 100 and drives the rotating shaft 231 and the steering component 210 through the first transmission gear 2321 and the second transmission gear 2323, which makes the steering action smoother and more accurate. Because the mobile chassis 100 is relatively stable, it will not produce additional shaking or interference due to the movement of the steering component 210, and can control the steering angle and force more accurately.

[0065] Reference Figure 2 , Figure 4 , Figure 6 as well as Figure 7 In one embodiment, the second driving member 240 includes a lead screw 241 and a second driving structure 242. The lead screw 241 is fixedly connected to one of the steering member 210 and the lifting member 220, and is threadedly engaged with the other. The second driving structure 242 is drivenly connected to the lead screw 241 and is used to drive the lead screw 241 to rotate.

[0066] In this embodiment, the lead screw 241 is arranged along the moving direction of the lifting member 220 and is parallel to but not collinear with the axis of the rotating shaft 231. It is understood that the second driving member 240 can also be an electric push rod or a cylinder. In this case, the electric push rod or cylinder is fixedly mounted on one of the steering member 210 and the lifting member 220, and the output shaft of the electric push rod or cylinder is fixedly connected to the other. The second driving member 240 can also be a linkage structure or a cam structure.

[0067] The lead screw 241 has a high-precision thread structure. When the second drive structure 242 drives the lead screw 241 to rotate, the steering component 210 or lifting component 220, which is threadedly engaged with the lead screw 241, will make precise linear movements along the axis of the lead screw 241. Simultaneously, the lead screw 241 transmission not only efficiently converts the rotational motion of the second drive structure 242 into linear motion and can transmit a large force, but also has good self-locking performance. When the drive stops, the lead screw 241 can prevent the steering component 210 or lifting component 220 from moving on its own due to gravity or external forces, ensuring the stability and safety of the steering component 210 or lifting component 220 in the stopped state. Furthermore, the above structural design also features smooth operation and low noise.

[0068] Reference Figure 2 , Figure 4 , Figure 6 as well as Figure 7 In one embodiment, the lead screw 241 is fixedly connected to the steering component 210 and threadedly engaged with the lifting component 220.

[0069] In this embodiment, the lifting member 220 is provided with a threaded through hole, through which the lead screw 241 passes and engages with the internal thread. Simultaneously, the lead screw 241 is fixedly connected to the steering member 210 by welding, snap-fitting, or plugging. It is understood that the lead screw 241 can also be threaded into the steering member 210 and fixedly connected to the lifting member 220. Furthermore, to prevent the lead screw 241 from detaching from the lifting member 220, a limiting block is fixedly installed on the lead screw 241 away from the steering member 210. The limiting block is located on the side of the threaded through hole away from the steering member 210, and the diameter of the limiting block is larger than the diameter of the threaded through hole.

[0070] The main task of the steering component 210 is to drive the lifting component 220 to rotate relative to the mobile chassis 100. The main task of the lifting component 220 is to slide on the steering component 210 in the direction of approaching or moving away from the ground. The lead screw 241 and the lifting component 220 are designed to be threaded together. Relying on the thread structure of the lead screw 241, the smoothness of the movement of the lifting component 220 is effectively guaranteed, and the jamming or shaking is avoided.

[0071] Reference Figure 2 , Figure 4 , Figure 6 as well as Figure 7 In one embodiment, the second drive structure 242 includes a third transmission gear 2421 and a second drive body 2422. The third transmission gear 2421 is driven to connect with the lead screw 241 and is used to drive the lead screw 241 to rotate. The second drive body 2422 is driven to connect with the third transmission gear 2421 and is used to drive the third transmission gear 2421 to rotate.

[0072] In this embodiment, the axis of the third transmission gear 2421 is parallel to the length direction of the lead screw 241. Transmission teeth can be fixedly surrounded on the outer circumferential surface of the lead screw 241. The third transmission gear 2421 is driven to connect with the lead screw 241 by meshing with the transmission teeth. The second drive body 2422 is located above or below the third transmission gear 2421 and is a geared motor. The axis of the output shaft of the geared motor is perpendicular to the axis of the third transmission gear 2421, and the output shaft of the geared motor is driven to connect with the third transmission gear 2421.

[0073] When the lifting component 220 needs to be moved, the second drive body 2422 drives the third transmission gear 2421 to rotate. Since the lifting component 220 or the limiting component restricts the rotation of the steering component 210 relative to the lifting component 220, the third transmission gear 2421 will drive the lead screw 241 to rotate under the continuous driving force applied by the second drive body 2422.

[0074] Gear transmission features smooth transmission, high transmission precision, and high transmission efficiency. The third transmission gear 2421 is driven by the lead screw 241, ensuring the stability, accuracy, and high efficiency of power transmission. Furthermore, the combination of the third transmission gear 2421 and the second drive unit 2422 makes the second drive structure 242 more compact, occupies less space, and is easier to install and maintain.

[0075] Reference Figure 2 , Figure 4 , Figure 6 as well as Figure 7 In one embodiment, the second drive structure 242 further includes a fourth transmission gear 2423, which is fixed to the lead screw 241 and meshes with the third transmission gear 2421.

[0076] In this embodiment, the fourth transmission gear 2423 is coaxially arranged with the lead screw 241 and fixedly sleeved on the lead screw 241; the axis of the fourth transmission gear 2423 is parallel to and not collinear with the axis of the third transmission gear 2421. The fourth transmission gear 2423 meshes with the third transmission gear 2421. This structure can increase the stability of the transmission system and facilitate the adjustment and maintenance of the entire transmission system. It is understood that the fourth transmission gear 2423 can also be integrally formed with the lead screw 241.

[0077] Reference Figure 2 , Figure 4 , Figure 6 as well as Figure 7 In one embodiment, the second drive body 2422 is disposed on the steering member 210. In this embodiment, the second drive body 2422 is fixedly mounted on the steering member 210.

[0078] During the sliding process of the lifting component 220 towards or away from the ground, it needs to bear its own weight and the weight of any additional tools or loads that may be attached. By placing the second drive body 2422 on the steering component 210, the burden on the lifting component 220 can be reduced, ensuring smooth lifting and lowering movements and improving the stability of the entire steering assembly 200 during operation.

[0079] Reference Figures 1 to 3 In one embodiment, the mobile chassis 100 includes a chassis body 110 and a moving wheel 120, which is rotatably mounted on the chassis body 110 for moving on the ground.

[0080] In this embodiment, there are four movable wheels 120. Two of the movable wheels 120 are drive wheels and are arranged opposite each other. Each of the two movable wheels 120 is equipped with a drive motor or shares the same drive motor. The other two movable wheels 120 are follower wheels such as omnidirectional wheels and are arranged opposite each other.

[0081] When the chassis system of this application is operating normally, the moving wheels 120 move on the ground. When the chassis system needs to turn, the second drive component 240 is first activated, driving the lifting component 220 to descend towards the ground. Once the steering component 210 and the moving wheels 120 are off the ground, the second drive component 240 stops operating. Then, the first drive component 230 is activated, causing the steering component 210 to rotate. Once the moving chassis 100 completes the turning action on the ground (i.e., reaches the expected turning angle), the first drive component 230 stops operating. Next, the second drive component 240 is activated, causing the lifting component 220 to rise away from the ground. During this process, the moving wheels 120 will contact the ground first. Once the lifting component 220 is off the ground, the second drive component 240 stops operating. At this point, the first drive component 230 can be activated, causing the steering component 210 and the lifting component 220 to rotate back, thus completing the overall steering of the chassis system.

[0082] Reference Figures 1 to 4 as well as Figures 6 to 8In one embodiment, one of the steering member 210 and the lifting member 220 is provided with a limiting protrusion 2111 and the other is provided with a limiting recess 2211. The lifting member 220 passes through the limiting protrusion 2111 into the limiting recess 2211 to restrict the relative rotation of the steering member 210 and the lifting member 220, and slides on the steering member 210 through the limiting protrusion 2111 within the limiting recess 2211.

[0083] On the one hand, the limiting protrusion 2111 and the limiting recess 2211 cooperate to effectively restrict the relative rotation between the steering component 210 and the lifting component 220. When the lifting component 220 contacts the ground, this structure ensures that the steering component 210 remains fixed under the action of the first driving component 230, so that the rotational driving force can be smoothly transmitted to the mobile chassis 100, thereby achieving precise steering of the mobile chassis 100. At the same time, it also effectively ensures the smoothness of the relative sliding between the lifting component 220 and the steering component 210. On the other hand, during the transmission process of the lead screw 241, the limiting protrusion 2111 and the limiting recess 2211 work together to constrain the lifting component 220 to move linearly only along the axial direction of the lead screw 241, preventing it from rotating, ensuring the linearity and accuracy of the lifting motion, and improving the operating accuracy and stability of the entire chassis system.

[0084] Reference Figures 1 to 4 as well as Figures 6 to 8 In one embodiment, a limiting protrusion 2111 is provided on the steering member 210, and a limiting recess 2211 is provided on the lifting member 220.

[0085] In this embodiment, the limiting protrusion 2111 is a limiting protrusion, a limiting protrusion strip, or a limiting protrusion plate, and the limiting protrusion 2111 is provided along the moving direction of the lifting member 220; the limiting recess 2211 is a limiting groove, and the limiting recess 2211 extends along the moving direction of the lifting member 220; the limiting protrusion 2111 and the limiting recess 2211 are adapted to each other, that is, after the limiting protrusion 2111 passes into the limiting recess 2211, it remains in contact with the inner wall surface of the limiting recess 2211. It can be understood that the limiting protrusion 2111 can also be provided on the lifting member 220, and the limiting recess 2211 can be provided on the steering member 210.

[0086] On the one hand, the steering component 210 typically has more structural space to accommodate the outwardly protruding limiting protrusion 2111 without interfering with surrounding components. On the other hand, the limiting recess 2211 on the lifting component 220 can better cooperate with the limiting protrusion 2111 of the steering component 210, and the smoothness of its lifting and lowering will not be affected by the limiting structure during the lifting and lowering process.

[0087] On the other hand, when the steering component 210 drives the lifting component 220 to rotate, the limiting protrusion 2111 on the steering component 210 can make the force transmission more direct and uniform. As the active rotating component, the steering component 210 transmits the rotational force it generates to the limiting recess 2211 of the lifting component 220 through the limiting protrusion 2111, which can better withstand and transmit torque and reduce component damage or wear caused by unreasonable force application points.

[0088] On the other hand, by setting the limiting protrusion 2111 on the steering component 210, the steering component 210 can be installed first, and then the lifting component 220 with the limiting recess 2211 can be installed in conjunction with the steering component 210. This makes it easier to align and install.

[0089] Reference Figures 1 to 4 as well as Figures 6 to 8 In one embodiment, the steering component 210 includes a steering support structure 211 and a steering connection structure 212. A limiting protrusion 2111 or a limiting recess 2211 is disposed on the steering support structure 211. The steering connection structure 212 is connected to the steering support structure 211. The first driving component 230 is fixedly connected to one of the mobile chassis 100 and the steering connection structure 212, and rotatably connected to the other.

[0090] The lifting component 220 includes a lifting support structure 221 and a lifting connection structure 222. A limiting recess 2211 or a limiting protrusion 2111 is provided on the lifting support structure 221. The lifting connection structure 222 is connected to the lifting support structure 221. The second driving component 240 is fixedly connected to one of the steering connection structure 212 and the lifting connection structure 222, and is drivenly connected to the other.

[0091] In this embodiment, the limiting protrusion 2111 is disposed on the steering support structure 211, and the steering connecting structure 212 and the steering support structure 211 are integrally formed. The first driving member 230 is rotatably connected to the movable chassis 100 and fixedly connected to the steering connecting structure 212. The limiting recess 2211 is disposed on the lifting support structure 221, and the lifting support structure 221 is located inside the steering support structure 211. The lifting connecting structure 222 and the lifting support structure 221 are integrally formed. The second driving member 240 is fixedly connected to the steering connecting structure 212 and drivably connected to the lifting support structure 221. It can be understood that the limiting recess 2211 can also be disposed on the steering support structure 211, and the limiting protrusion 2111 can be disposed on the lifting support structure 221.

[0092] The steering support structure 211 not only supports the steering connection structure 212 and the limiting protrusion 2111, but also effectively strengthens the overall structural strength of the steering component 210; the steering connection structure 212 plays a connecting role, realizing a stable connection between the steering component 210 and the first driving component 230, providing a reliable guarantee for the smooth operation of steering.

[0093] The lifting support structure 221 not only supports the lifting connection structure 222 and the limiting recess 2211, but also effectively strengthens the overall structural strength of the lifting component 220; the lifting connection structure 222 serves as a connection, realizing a stable connection between the lifting component 220 and the second driving component 240, thus ensuring the smooth operation of the lifting action.

[0094] Reference Figures 1 to 4 as well as Figures 6 to 8 In one embodiment, the steering support structure 211 is a support rod, support plate, or support frame, and the steering connection structure 212 is a connecting rod or connecting plate; the lifting support structure 221 is a support rod, support plate, or support frame, and the lifting connection structure 222 is a connecting rod or connecting plate.

[0095] When the steering support structure 211 is a support rod, there are four steering support structures 211, each corresponding to one of the four corners of the mobile chassis 100. It is understood that in this case, the number of steering support structures 211 could also be two, three, five, or more. When the steering support structure 211 is a support plate, there are two steering support structures 211, arranged opposite each other. It is understood that in this case, the number of steering support structures 211 could also be three, four, or more. When the steering support structure 211 is a support frame, it has a downward-facing opening.

[0096] When the chassis system is placed on a ground surface, the steering connection structure 212 is located above the steering support structure 211. If the steering connection structure 212 is a connecting rod, there is at least one steering connection structure 212, and it is positioned above the steering support structure 211. If the steering connection structure 212 is a connecting plate, it is positioned above the steering support structure 211.

[0097] When the chassis system is placed on the ground, the lifting support structure 221 is located below the steering support structure 211. When the lifting support structure 221 is a support rod, there are four lifting support structures 221, each corresponding to one of the four corners of the mobile chassis 100. It is understood that in this case, the number of lifting support structures 221 can also be two, three, five, or more. When the lifting support structure 221 is a support plate, there are two lifting support structures 221, arranged opposite each other. It is understood that in this case, the number of lifting support structures 221 can also be three, four, or more. When the lifting support structure 221 is a support frame, it has a downward-facing opening.

[0098] When the chassis system is placed on the ground, the lifting connection structure 222 is located below the lifting support structure 221; when the lifting connection structure 222 is a connecting rod, there is at least one lifting connection structure 222, and it is positioned above the lifting support structure 221. When the lifting connection structure 222 is a connecting plate, it is positioned above the lifting support structure 221.

[0099] The above structures are all simple, which not only facilitates manufacturing and processing, but also makes installation and maintenance easy. Meanwhile, the steering support structure 211, steering connection structure 212, lifting support structure 221, and lifting connection structure 222 employ diverse structures, which helps adapt to different usage scenarios and facilitates customization and optimization, greatly improving design flexibility.

[0100] Reference Figures 1 to 9 According to another aspect of this application, embodiments of this application also provide a lawn mowing device, which includes a cutting system 300 and the aforementioned chassis system. The cutting system 300 includes a cutting element 310, which has a preset gap with the ground.

[0101] In this embodiment, the cutting element 310 is any one of a rotating blade, a nylon rope, or a disc cutter.

[0102] During the turning of the mobile chassis 100, the cutting element 310 maintains a preset gap with the ground at all times. This design ensures that the cutting element 310 can rotate continuously, avoiding situations where the cutting element 310 stops operating due to turning and then needs to be restarted. The cutting element 310 often takes a long time to restart after stopping, which not only reduces work efficiency but may also cause additional wear and tear on the equipment. This design allows the cutting element 310 to operate continuously, significantly improving cutting efficiency, reducing the overall operating time of the equipment, and providing strong support for efficient lawn mowing operations.

[0103] Reference Figures 1 to 9 In one embodiment, the cutting system 300 further includes a cutting cover 320, which is fixedly connected to the steering member 210 and slidably disposed in the lifting member 220; the cutting cover 320 is rotatably disposed inside the cutting cover 320.

[0104] In this embodiment, the cutting guard 320 is indirectly connected to the steering member 210. Specifically, the cutting system 300 also includes a cutting drive and a cutting mounting base 330. The cutting mounting base 330 is fixedly mounted on the cutting guard 320. The cutting drive is a drive motor, which is also fixedly mounted on the cutting mounting base 330. The output shaft of the cutting drive is driven to the cutting member 310 to drive the cutting member 310 to rotate on the cutting guard 320. In addition, the cutting system 300 also includes a third drive 340 and a linkage mechanism 350 mounted on the steering member 210. The third drive 340 is a geared motor, which is also fixedly mounted on the steering member 210. The input end of the linkage mechanism 350 is driven to the output shaft of the third drive 340, and the output end of the linkage mechanism 350 is fixedly connected to the cutting mounting base 330. The linkage mechanism 350 is used to drive the cutting mounting base 330 to move in a direction closer to or farther from the ground to cut lawns of different heights. Understandably, the cutting guard 320 can also be directly connected to the steering component 210.

[0105] Furthermore, the cutting guard 320 has three openings, one facing downwards, and the other two openings are opposite each other and adjacent to the downward-facing opening. Both the steering member 210 and the lifting member 220 are guards with three openings each. The openings on the steering member 210 correspond one-to-one with the openings on the cutting guard 320, and the openings on the lifting member 220 correspond one-to-one with the openings on the cutting guard 320. The cutting guard 320 not only protects the cutting member 310 but also effectively reduces the possibility of cut grass or other objects entering the interior of the cutting member 310.

[0106] In summary, implementing the steering component 200 and lawn mowing equipment provided in this embodiment has at least the following beneficial technical effects:

[0107] When the chassis system of this application needs to turn on the ground, the second drive unit 240 is first activated, which drives the lifting unit 220 to descend towards the ground. After the lifting unit 220 moves to contact the ground, the second drive unit 240 continues to operate. Since the lifting unit 220 has made contact with the ground, it will remain stationary or rotate relative to the ground. Because the second drive unit 240 can drive the steering unit 210 and the lifting unit 220 to move relative to each other, the steering unit 210 will drive the steering unit 210 and the mobile chassis 100 to rise away from the ground. After the steering unit 210 and the mobile chassis 100 leave the ground, the second drive unit 240 can stop operating.

[0108] Then the first drive component 230 is activated, which drives the steering component 210 to rotate. Since the lifting component 220 or the limiting component restricts the rotation of the steering component 210 relative to the lifting component 220, and the first drive component 230 can drive the mobile chassis 100 and the steering component 210 to rotate relative to each other, the mobile chassis 100 will rotate relative to the ground under the driving action of the first drive component 230, so that the steering action can be completed on the ground.

[0109] Once the mobile chassis 100 completes its steering maneuver on the ground (i.e., reaches the expected steering angle), the first drive unit 230 can stop operating. Then, the second drive unit 240 is activated, causing the lifting unit 220 to rise away from the ground. After the mobile chassis 100 contacts the ground, the second drive unit 240 continues to drive the lifting unit 220 away from the ground. During this process, the mobile chassis 100 will touch the ground first. After the lifting unit 220 leaves the ground, the second drive unit 240 can stop operating. Then, the first drive unit 230 can be activated, causing the steering unit 210 and the lifting unit 220 to rotate back, thus completing the steering of the entire chassis system.

[0110] The steering component 200 of this application allows for flexible adjustment of the attitude of the mobile chassis 100. When the lifting component 220 moves to contact the ground, the second drive component 240 drives the steering component 210 and the mobile chassis 100 away from the ground. Subsequently, the first drive component 230 drives the mobile chassis 100 to rotate relative to the ground. This chassis system abandons the traditional differential steering mechanism of the mobile chassis 100, instead using the lifting component 220 as a support point to achieve in-situ or small-radius steering of the mobile chassis 100. This not only significantly reduces the turning radius, avoiding excessive friction and slippage between the mobile chassis 100 and the ground due to an excessively large turning radius, effectively protecting the integrity and aesthetics of the surface to be protected, but also allows the chassis system to turn more freely in narrow spaces or complex terrain, improving the flexibility of steering operations. Furthermore, it simplifies the structure and control logic of the chassis system and reduces its overall weight.

[0111] The above are merely preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A chassis system, characterized in that, The system includes a mobile chassis and a steering assembly, the mobile chassis being used for movement on the ground, the steering assembly comprising: Steering components are rotatably mounted on the mobile chassis; The lifting component is capable of moving towards or away from the ground. The first driving component is fixedly connected to one of the mobile chassis and the steering component, and rotatably connected to the other, so as to drive the mobile chassis and the steering component to rotate relative to each other; The second driving component is fixedly connected to one of the steering component and the lifting component, and drivenly connected to the other, so as to drive the steering component and the lifting component to move relative to each other; After the lifting component moves to contact the ground, the steering component and the mobile chassis can move away from the ground under the drive of the second driving component, and the mobile chassis can rotate relative to the steering component and the ground under the drive of the first driving component.

2. The chassis system according to claim 1, characterized in that, The first driving component includes a rotating shaft and a first driving structure. The rotating shaft is fixedly connected to one of the mobile chassis and the steering component, and rotatably connected to the other. The first driving structure is driven to the rotating shaft and is used to drive the rotating shaft to rotate.

3. The chassis system according to claim 2, characterized in that, The first driving structure includes a first transmission gear and a first driving body. The first transmission gear is driven to the rotating shaft and is used to drive the rotating shaft to rotate. The first driving body is driven to the first transmission gear and is used to drive the first transmission gear to rotate.

4. The chassis system according to claim 3, characterized in that, The first drive structure further includes a second transmission gear, which is fixed to the rotating shaft and meshes with the first transmission gear.

5. The chassis system according to claim 3, characterized in that, The first drive unit is mounted on the mobile chassis.

6. The chassis system according to claim 1, characterized in that, The second driving component includes a lead screw and a second driving structure. The lead screw is fixedly connected to one of the steering component and the lifting component, and is threadedly engaged with the other. The second drive structure is connected to the lead screw drive and is used to drive the lead screw to rotate.

7. The chassis system according to claim 6, characterized in that, The second driving structure includes a third transmission gear and a second driving body. The third transmission gear is driven to the lead screw and is used to drive the lead screw to rotate. The second driving body is driven to the third transmission gear and is used to drive the third transmission gear to rotate.

8. The chassis system according to claim 7, characterized in that, The second drive structure further includes a fourth transmission gear, which is fixed to the lead screw and meshes with the third transmission gear.

9. The chassis system according to claim 7, characterized in that, The second drive unit is disposed on the steering component.

10. The chassis system according to any one of claims 1 to 9, characterized in that, One of the steering component and the lifting component is provided with a limiting protrusion, and the other is provided with a limiting recess. The lifting component passes through the limiting protrusion into the limiting recess to restrict the relative rotation of the steering component and the lifting component, and slides on the steering component through the limiting protrusion in the limiting recess.

11. The chassis system according to claim 10, characterized in that, The steering component includes a steering support structure and a steering connection structure. The limiting protrusion or the limiting recess is disposed on the steering support structure. The steering connection structure is connected to the steering support structure. The first driving component is fixedly connected to one of the mobile chassis and the steering connection structure, and rotatably connected to the other. The lifting component includes a lifting support structure and a lifting connection structure. The limiting recess or the limiting protrusion is disposed on the lifting support structure. The lifting connection structure is connected to the lifting support structure. The second driving component is fixedly connected to one of the steering connection structure and the lifting connection structure, and is drivenly connected to the other.

12. The chassis system according to claim 11, characterized in that, The steering support structure is a support rod, a support plate, or a support frame, and the steering connection structure is a connecting rod or a connecting plate; The lifting support structure is a support rod, a support plate, or a support frame, and the lifting connection structure is a connecting rod or a connecting plate.

13. A lawn mowing device, characterized in that, The system includes a cutting system and a chassis system according to any one of claims 1 to 12, wherein the cutting system includes a cutting element having a predetermined gap with the ground.

14. The lawnmower according to claim 13, characterized in that, The cutting system also includes a cutting guard, which is fixedly connected to the steering component and slidably disposed on the lifting component; the cutting component is rotatably disposed inside the cutting guard.

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