A mower chassis electric lifting mechanism

Abstract

This utility model discloses an electric lifting mechanism for a lawnmower chassis, belonging to the field of lawnmowers. It solves the problems of inconvenient and inaccurate height adjustment in existing technologies. The technical solution includes a chassis and wheels. The chassis is equipped with an operation panel, a drive motor, a worm gear and worm shaft, and a rotating plate. The output shaft of the drive motor is fixedly connected to the worm shaft. The worm gear and worm shaft mesh. The rotating plate and worm gear rotate synchronously. The rotating plate is connected to the wheels via a linkage mechanism. The operation panel controls the rotation of the drive motor. The rotation of the drive motor drives the rotation of the rotating plate through the worm gear and worm shaft. The rotation of the rotating plate drives the linkage mechanism, which in turn raises and lowers the chassis relative to the wheels. This utility model is used to achieve stepless electric height adjustment of the chassis.

Description

Technical Field

[0001] This utility model relates to the field of lawnmowers, and in particular to an electric lifting mechanism for lawnmower chassis. Background Technology

[0002] To maintain the beauty and health of the lawn, the height of the lawnmower can be adjusted to control the mowing height, ensuring the lawn's optimal growth in different seasons and weather conditions, thus meeting the user's needs in various scenarios.

[0003] To achieve different cutting heights, a height adjustment device is needed on the lawnmower. This device adjusts the chassis height, which in turn adjusts the blade height. Existing height adjustment mechanisms include a height adjustment baffle, a height adjustment handle, and a tension spring. However, the adjustment range of the tension spring is limited. When adjusting to the lowest setting, the tension spring's pull turns the assist into resistance, making shifting the gear quite difficult. Conversely, when adjusting to the highest setting, the spring's pull is relatively small, making shifting the gear still quite difficult. Furthermore, the gear height is a fixed value, and the large differences between gears make accurate height adjustment difficult. Adjusting the height requires stopping the mowing operation and then moving the height adjustment handle, which is inconvenient and inflexible. Utility Model Content

[0004] The purpose of this invention is to provide an electric lifting mechanism for the chassis of a lawnmower, which solves the problems of inconvenient and inaccurate height adjustment in the prior art, and realizes stepless electric adjustment of the chassis height.

[0005] To achieve the above objectives, this utility model adopts the following technical solution: an electric lifting mechanism for a lawnmower chassis, comprising a chassis and wheels, wherein the chassis is provided with an operation panel, a drive motor, a worm gear and a worm, and a rotating plate, the output shaft of the drive motor is fixedly connected to the worm, the worm gear meshes with the worm, the rotating plate and the worm gear rotate synchronously, the rotating plate is connected to the wheels via a linkage mechanism, the operation panel controls the rotation of the drive motor, the rotation of the drive motor drives the rotation of the rotating plate through the worm and worm gear, the rotation of the rotating plate drives the linkage mechanism to move, and the movement of the linkage mechanism can cause the chassis to rise and fall relative to the wheels.

[0006] After adopting the above technical solution, this utility model has the following advantages: The drive motor can be easily controlled via the operation panel to adjust the chassis height and thus the mowing height, eliminating the need to stop mowing during height adjustment. Users can also complete the height adjustment without manual intervention, making the mowing operation more continuous and smooth, improving work efficiency, and making operation more flexible and convenient. Simultaneously, the linkage mechanism connects the rotating plate and the traveling wheels. When the rotating plate rotates due to the worm gear and worm drive, this rotational motion is converted into vertical movement of the chassis relative to the traveling wheels through the linkage mechanism. This makes the entire height adjustment process more stable and smooth, avoiding sudden height changes. Changes can damage the lawn, and the worm gear and worm allow for stepless adjustment, meaning users can set the mowing height more precisely as needed, rather than being limited to a few fixed settings. The huge reduction ratio of the worm gear and worm amplifies the rotational torque of the drive motor, easily raising and lowering the heavy chassis. At the same time, the worm gear and worm have a self-locking function; once the desired height is set, the system can automatically lock the current position even after the motor drive stops, preventing the chassis from moving unexpectedly due to external forces (such as the resistance of the lawn), ensuring stability during mowing as much as possible, and helping to maintain consistent mowing quality.

[0007] Furthermore, the linkage mechanism includes a pull rod, a connecting rod, and an adjusting rod. The two ends of the connecting rod are respectively hinged to the pull rod and the adjusting rod. The other end of the pull rod is hinged to a rotating plate, and the other end of the adjusting rod is hinged to a traveling wheel to form a rotation fulcrum. The chassis is rotatably mounted on the hinge shaft between the connecting rod and the adjusting rod. The rotational movement of the rotating plate is transmitted through the pull rod and the connecting rod to drive the adjusting rod to rotate around the rotation fulcrum, thereby driving the hinge shaft to rise and fall. The chassis rises and falls with the hinge shaft.

[0008] Using the aforementioned technical solution, the rotating plate, pull rod, connecting rod, and adjusting rod form a four-bar linkage. When the rotating plate rotates, the force is transmitted sequentially to the adjusting rod through the pull rod and connecting rod. This efficiently converts the circular motion of the rotating plate into the rotational motion of the adjusting rod around the pivot point, driving the hinge shaft to rise and fall, thereby causing the chassis to rise and fall smoothly, ensuring the stability and efficiency of power transmission. The rotating plate is controlled by the drive motor's braking mechanism, meaning that users can easily control the chassis height adjustment via the control panel without manual intervention, greatly facilitating user operation and improving work efficiency.

[0009] Furthermore, the traveling wheel includes a front wheel and a rear wheel, and the rotating plate is located between the front wheel and the rear wheel. The rotating plate is connected to both the front wheel and the rear wheel simultaneously through two sets of the linkage mechanisms.

[0010] By employing the aforementioned technical solution, two sets of linkage mechanisms are used to connect the front and rear wheels respectively, ensuring that the lawnmower can achieve synchronous and consistent height adjustments at both ends during operation. The rotating plate is positioned between the front and rear wheels, making full use of the lawnmower's space. Furthermore, the two linkage mechanisms are driven by the same rotating plate, reducing the number of adjustment mechanisms and making the overall structure more compact.

[0011] Furthermore, one end of the rotating plate is connected to the worm gear shaft, and the two tie rods of the two sets of linkage mechanisms are symmetrically hinged to the other end of the rotating plate.

[0012] By adopting the aforementioned technical solution, when the rotating plate changes angle due to the rotation of the worm gear, the two sets of linkage mechanisms can work together to further ensure that the front and rear ends of the lawnmower can achieve synchronous and consistent height adjustment during operation, so that the chassis can be raised and lowered more smoothly, reducing shaking and bumping during the raising and lowering process, and further improving the stability and accuracy of the lawnmower chassis height adjustment.

[0013] Furthermore, the worm gear is arranged in the front-to-back direction, and the worm wheel is rotatably mounted on the chassis in the front-to-back direction to drive the rotating plate to rotate in the front-to-back direction.

[0014] By using the above technical solution, the worm and worm wheel are arranged in the front-to-back direction, which can match the front-to-back layout of the lawnmower, make full use of the chassis space, avoid occupying too much space in the left-to-right or up-to-down direction, and make the entire transmission system more compact.

[0015] Furthermore, the chassis has a downward-facing mounting notch, and the hinge shaft is installed within the mounting notch and abuts against the mounting notch to support the chassis.

[0016] The above technical solution provides a clear positioning and installation space for the hinge shaft by setting the mounting notch. Simply place the hinge shaft into the mounting notch without the need for a complicated positioning and calibration process, which greatly improves installation efficiency and reduces assembly difficulty. The hinge shaft abuts against the mounting notch, which can provide stable support for the chassis, thereby adjusting the height of the chassis by changing the height of the hinge shaft.

[0017] Furthermore, the chassis is also equipped with a position sensor to acquire the rotation angle of the rotating plate, and the drive motor controls the height of the chassis by controlling the rotation angle of the rotating plate through the signal from the position sensor.

[0018] Through the above technical solution, the position sensor can more accurately obtain the rotation angle of the rotating plate, and the drive motor controls the rotation of the rotating plate according to the electrical signal, thereby achieving more precise adjustment of the chassis height.

[0019] Furthermore, the chassis is provided with a drive shaft, the rotating plate and the worm gear are mounted on the drive shaft, and the position sensor is arranged around the drive shaft.

[0020] With the above technical solution, since the rotating plate and the worm gear are both mounted on the same drive shaft, their movements are synchronized. The rotation angle of the rotating plate can be obtained by monitoring the rotation angle and state of the drive shaft. The position sensor is surrounded by the drive shaft, which also means that the position sensor can be directly installed close to the monitored object, simplifying the wiring and making the layout more compact.

[0021] Furthermore, the rotating plate and the position sensor are located on both sides of the worm gear on the drive shaft.

[0022] By fully utilizing the space on both sides of the worm gear, the distribution of the rotating plate, worm gear, and position sensor on the drive shaft becomes more uniform and reasonable, minimizing mutual interference between components, effectively improving space utilization, and contributing to the compact design of the overall structure of the lawnmower.

[0023] Furthermore, the chassis includes a bottom shell and a top cover, which are fastened together to form a receiving cavity, and the drive motor, worm gear and worm, and rotating plate are located within the receiving cavity.

[0024] By using the above technical solution, the drive motor, worm gear, worm, and rotating plate are placed in a closed cavity formed by the bottom shell and the top cover, which can effectively prevent the intrusion of external dust, moisture, and weeds from affecting the normal use of the lawnmower. Attached Figure Description

[0025] The present invention will be further described below with reference to the accompanying drawings:

[0026] Figure 1 This is a schematic diagram of the structure of the lawnmower of this utility model;

[0027] Figure 2 This is a schematic diagram of the electric lifting mechanism of the lawnmower chassis of this utility model at a higher height;

[0028] Figure 3 This is a schematic diagram of the electric lifting mechanism of the lawnmower chassis of this utility model at a lower height;

[0029] Figure 4 This is an exploded view of the electric lifting mechanism of the lawnmower chassis of this utility model.

[0030] Figure 5 This is an exploded view of part of the structure of the electric lifting mechanism of the lawnmower chassis of this utility model;

[0031] In the diagram, 10 is the chassis; 101 is the mounting notch; 102 is the bottom shell; 11 is the running wheel; 111 is the front wheel; 112 is the rear wheel; 20 is the drive motor; 21 is the worm gear; 22 is the worm; 23 is the rotating plate; 24 is the tie rod; 25 is the connecting rod; 26 is the adjusting rod; 27 is the hinge shaft; 28 is the drive shaft; 29 is the housing; 30 is the position sensor; 31 is the mounting base; 32 is the positioning protrusion; 33 is the mounting notch; and 34 is the bearing. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments.

[0033] The terms "first," "second," "third," "fourth," etc. (if present) in the specification, claims, and accompanying drawings of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the utility model described herein can be implemented in orders other than those illustrated or described herein.

[0034] It should be understood that in the various embodiments of this utility model, the number of each process does not imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this utility model.

[0035] It should be understood that in this invention, "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such process, method, product or device.

[0036] It should be understood that in this utility model, "multiple" refers to two or more. "And / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, X and / or Y can represent: X alone, X and Y simultaneously, or Y alone. The character " / " generally indicates that the preceding and following related objects are in an "or" relationship. "Contains X, Y, and Z", "Contains X, Y, and Z" means that all three X, Y, and Z are contained; "Contains X, Y, or Z" means that one of X, Y, and Z is contained; "Contains X, Y, and / or Z" means that any one, two, or three of X, Y, and Z are contained.

[0037] The technical solution of this utility model will be described in detail below with specific embodiments. The following specific embodiments can be selected to be combined or substituted with each other according to the actual situation, and the same or similar concepts or processes may not be described again in some embodiments.

[0038] like Figures 1 to 5 As shown, this utility model provides an electric lifting mechanism for a lawnmower chassis, including a chassis 10 and wheels 11. The chassis 10 is provided with an operation panel, a drive motor 20, a worm gear 21 and a worm 22, and a rotating plate 23. The output shaft of the drive motor 20 is fixedly connected to the worm 22. The worm gear 21 and the worm 22 mesh. The rotating plate 23 and the worm gear 21 rotate synchronously. The rotating plate 23 is connected to the wheels 11 through a linkage mechanism. The operation panel controls the rotation of the drive motor 20. The rotation of the drive motor 20 drives the rotation of the rotating plate 23 through the worm 22 and the worm gear 21. The rotation of the rotating plate 23 drives the linkage mechanism to move. The movement of the linkage mechanism can drive the chassis 10 to rise and fall relative to the wheels 11.

[0039] The height of the chassis 10 can be easily adjusted by controlling the drive motor 20 through the control panel, thereby adjusting the mowing height. There is no need to stop mowing during height adjustment, and users can complete the adjustment without manual intervention, making the mowing operation more continuous and smooth, improving work efficiency, and making operation more flexible and convenient. Simultaneously, the linkage mechanism connects the rotating plate 23 and the traveling wheels 11. When the rotating plate 23 rotates due to the transmission of the worm gear 21 and worm 22, this rotational motion is converted into vertical movement of the chassis 10 relative to the traveling wheels 11 through the linkage mechanism. This makes the entire height adjustment process smoother and more stable, avoiding potential damage to the lawn caused by sudden height changes. Furthermore, the worm gear 21 and worm 22 allow for stepless adjustment, meaning users can set the mowing height more precisely as needed, rather than being limited to a few fixed gears. The large reduction ratio of the worm gear 21 and worm 22 amplifies the rotational torque of the drive motor 20, easily raising and lowering the heavy chassis 10. At the same time, the worm gear 21 and worm 22 have a self-locking function. Once the desired height is set, the system can automatically lock the current position even after the motor drive is stopped, preventing the chassis 10 from moving unexpectedly due to external forces (such as the resistance of the lawn). This ensures stability during the mowing process and helps maintain consistent mowing quality.

[0040] It should be noted that the lawnmower includes blades for cutting grass, which are mounted on the chassis 10. The blades rise and fall synchronously with the chassis 10 to adjust the cutting height. Since the rotation angle of the rotating plate 23 is within a certain angle, the worm gear 21 can be a sector-shaped worm gear 21.

[0041] To ensure more synchronized height adjustments at both ends of the lawnmower, the walking wheels 11 include a front wheel 111 and a rear wheel 112. A rotating plate 23 is located between the front wheel 111 and the rear wheel 112. The rotating plate 23 is connected to both the front wheel 111 and the rear wheel 112 via two sets of linkage mechanisms, ensuring synchronized and consistent height adjustments at both ends of the lawnmower during operation. The rotating plate 23 makes full use of the space between the front wheel 111 and the rear wheel 112, and the two sets of linkage mechanisms are driven by the same rotating plate 23, reducing the number of adjustment mechanisms and making the overall structure more compact.

[0042] Specifically, the linkage mechanism includes a pull rod 24, a connecting rod 25, and an adjusting rod 26. Both ends of the connecting rod 25 are hinged to the pull rod 24 and the adjusting rod 26, respectively. The other end of the pull rod 24 is hinged to a rotating plate 23, and the other end of the adjusting rod 26 is hinged to a traveling wheel 11 to form a pivot point. The chassis 10 is rotatably mounted on a hinge shaft 27 between the connecting rod 25 and the adjusting rod 26. The rotational movement of the rotating plate 23 is transmitted through the pull rod 24 and the connecting rod 25 to drive the adjusting rod 26 to rotate around the pivot point, thereby raising and lowering the hinge shaft 27. The chassis 10 rises and falls with the hinge shaft 27, ensuring the stability and efficiency of power transmission. The rotating plate 23 is controlled by the drive motor 20, meaning that users can easily control the height adjustment of the chassis 10 through the control panel without manual intervention, greatly facilitating user operation and improving work efficiency.

[0043] One end of the rotating plate 23 is connected to the shaft of the worm gear 21, and the two tie rods 24 of the two linkage mechanisms are symmetrically hinged to the other end of the rotating plate 23. When the rotating plate 23 changes angle due to the rotation of the worm gear 21, the two linkage mechanisms can work together to further ensure that the front and rear ends of the lawnmower can achieve synchronous and consistent height adjustment during operation, so that the chassis 10 can be raised and lowered more smoothly, reducing shaking and bumping during the raising and lowering process, and further improving the stability and accuracy of the height adjustment of the lawnmower chassis 10.

[0044] Specifically, a drive shaft 28 is provided on the chassis 10, and a rotating plate 23 and a worm gear 21 are mounted on the drive shaft 28. The rotating plate 23 and the worm gear 21 rotate synchronously through the drive shaft 28.

[0045] It should be noted that the two linkages 24 of the two linkage mechanisms are of different lengths. One linkage 24 is straight, which is suitable for providing direct force transmission and support; the other linkage 24 is curved, which can provide better flexibility.

[0046] For ease of installation, the chassis 10 has a downward-facing mounting notch 101. The hinge shaft 27 is installed within the mounting notch 101 and abuts against it to support the chassis 10. The mounting notch 101 provides clear positioning and installation space for the hinge shaft 27. Simply insert the hinge shaft 27 into the mounting notch 101; no complex positioning and calibration process is required, greatly improving installation efficiency and reducing assembly difficulty. The abutment between the hinge shaft 27 and the mounting notch 101 provides stable support for the chassis 10, allowing the height of the chassis 10 to be adjusted by changing the height of the hinge shaft 27.

[0047] To make the lawnmower structure more compact, since the lawnmower is relatively long in the front-to-back direction, the worm 22 is arranged along the front-to-back direction of the lawnmower, and the worm wheel 21 is rotatably mounted on the chassis 10 in the front-to-back direction to drive the rotating plate 23 to rotate in the front-to-back direction. The worm 22 and worm wheel 21 are aligned with the front-to-back direction of the lawnmower, and correspondingly, the worm wheel 21 is rotatably mounted on the chassis 10 in the front-to-back direction of the lawnmower. This arrangement fits the front-to-back layout of the lawnmower, making full use of the space in the chassis 10 and avoiding excessive space occupation in the left-to-right or up-to-down directions, thus making the entire transmission system more compact.

[0048] In order to make the height of the chassis 10 more precise, the chassis 10 is also equipped with a position sensor 30 to obtain the rotation angle of the rotating plate 23. The drive motor 20 controls the height of the chassis 10 by controlling the rotation angle of the rotating plate 23 through the signal of the position sensor 30, thereby realizing more precise adjustment of the height of the chassis 10.

[0049] The position sensor 30 is arranged around the drive shaft 28. By monitoring the rotation angle and state of the drive shaft 28, the rotation angle of the rotating plate 23 can be obtained. The fact that the position sensor 30 is arranged around the drive shaft 28 also means that the position sensor 30 can be directly installed close to the object being monitored, which simplifies the wiring and makes the layout more compact.

[0050] It should be noted that the position sensor 30 is a Hall sensor. A small magnet can be mounted on the drive shaft 28, while the Hall sensor remains stationary. As the drive shaft 28 rotates, the position of the magnet relative to the Hall sensor changes, causing the magnetic field strength detected by the Hall sensor to change accordingly. Based on the Hall effect, this is converted into a corresponding change in electrical signal. By processing and analyzing these electrical signals, the rotation angle information of the drive shaft 28 can be obtained, that is, the rotation angle information of the rotating plate 23 that rotates synchronously with the drive shaft 28 can be obtained.

[0051] To further refine the structure, the rotating plate 23 and the position sensor 30 are located on both sides of the worm gear 21 on the drive shaft 28. By making full use of the space on both sides of the worm gear 21, the rotating plate 23, the worm gear 21, and the position sensor 30 are distributed more evenly and rationally on the drive shaft 28, minimizing mutual interference between components, effectively improving space utilization, and contributing to the compact design of the overall lawnmower structure.

[0052] To reduce the interference of weeds in the use of the lawnmower, the chassis 10 includes a bottom shell 102 and a top cover. The bottom shell 102 and the top cover are fastened together to form a receiving cavity. The drive motor 20, worm gear 21 and worm 22 and the rotating plate 23 are located in the receiving cavity, which can effectively prevent the intrusion of external dust, moisture and weeds from affecting the normal use of the lawnmower.

[0053] Furthermore, a housing 29 surrounds the worm gear 21 and worm 22, creating a double-enclosed configuration to further prevent the intrusion of external dust, moisture, and weeds. The worm 22 is rotatably mounted on the housing 29 via a bearing 34. To facilitate the installation of the Hall sensor, a mounting base 31 for the Hall sensor is provided on the housing 29. The mounting base 31 has a mounting notch 33, and the Hall sensor has a positioning protrusion 32. The Hall sensor is mounted on the mounting base 31 by engaging the positioning protrusion 32 with the mounting notch 33. The mounting base 31 is detachably connected to the housing 29 by screws.

[0054] Understandably, in other embodiments, the worm gear can also be arranged in the left-right direction to make full use of the space in the left-right direction of the lawnmower.

[0055] Understandably, in other embodiments, the chassis may also be provided with mounting holes, and the hinge shaft passes through the mounting holes and abuts against the mounting holes to support the chassis. The hinge shaft is limited by the inner wall of the mounting holes on all four sides, making the installation of the chassis more reliable.

[0056] In addition to the preferred embodiments described above, there are other embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection claimed by this utility model.

Claims

1. An electric lifting mechanism for a lawnmower chassis, comprising a chassis (10) and wheels (11), characterized in that, The chassis (10) is provided with an operation panel, a drive motor (20), a worm gear (21), a worm (22), and a rotating plate (23). The output shaft of the drive motor (20) is fixedly connected to the worm (22). The worm gear (21) meshes with the worm (22). The rotating plate (23) and the worm gear (21) rotate synchronously. The rotating plate (23) is connected to the walking wheel (11) through a linkage mechanism. The operation panel controls the rotation of the drive motor (20). The rotation of the drive motor (20) is transmitted through the worm (22) and the worm gear (21) to drive the rotation of the rotating plate (23). The rotation of the rotating plate (23) drives the linkage mechanism to move. The movement of the linkage mechanism can drive the chassis (10) to rise and fall relative to the walking wheel (11).

2. The electric lifting mechanism for the lawnmower chassis according to claim 1, characterized in that, The linkage mechanism includes a pull rod (24), a connecting rod (25), and an adjusting rod (26). The two ends of the connecting rod (25) are hinged to the pull rod (24) and the adjusting rod (26) respectively. The other end of the pull rod (24) is hinged to the rotating plate (23). The other end of the adjusting rod (26) is hinged to the traveling wheel (11) to form a rotation fulcrum. The chassis (10) is rotatably mounted on the hinge shaft (27) between the connecting rod (25) and the adjusting rod (26). The rotational movement of the rotating plate (23) is transmitted through the pull rod (24) and the connecting rod (25) to drive the adjusting rod (26) to rotate around the rotation fulcrum, thereby driving the hinge shaft (27) to rise and fall. The chassis (10) rises and falls with the hinge shaft (27).

3. The electric lifting mechanism for the lawnmower chassis according to claim 2, characterized in that, The walking wheel (11) includes a front wheel (111) and a rear wheel (112). The rotating plate (23) is located between the front wheel (111) and the rear wheel (112). The rotating plate (23) is connected to the front wheel (111) and the rear wheel (112) simultaneously through two sets of the linkage mechanism.

4. The electric lifting mechanism for the lawnmower chassis according to claim 3, characterized in that, One end of the rotating plate (23) is connected to the shaft of the worm gear (21), and the two pull rods (24) of the two sets of linkage mechanisms are symmetrically hinged to the other end of the rotating plate (23).

5. The electric lifting mechanism for the lawnmower chassis according to claim 3, characterized in that, The worm (22) is arranged in the front-back direction, and the worm wheel (21) is rotatably arranged on the chassis (10) in the front-back direction to drive the rotating plate (23) to rotate in the front-back direction.

6. The electric lifting mechanism for the lawnmower chassis according to claim 2, characterized in that, The chassis (10) has a downward-facing mounting notch (101), and the hinge shaft (27) is installed in the mounting notch (101) and abuts against the mounting notch (101) to support the chassis (10).

7. The electric lifting mechanism for the lawnmower chassis according to claim 1, characterized in that, The chassis (10) is also provided with a position sensor (30) for obtaining the rotation angle of the rotating plate (23). The drive motor (20) controls the height of the chassis (10) by controlling the rotation angle of the rotating plate (23) through the signal of the position sensor (30).

8. The electric lifting mechanism for the lawnmower chassis according to claim 7, characterized in that, The chassis (10) is provided with a drive shaft (28), the rotating plate (23) and the worm gear (21) are mounted on the drive shaft (28), and the position sensor (30) is arranged around the drive shaft (28).

9. The electric lifting mechanism for the lawnmower chassis according to claim 8, characterized in that, The rotating plate (23) and the position sensor (30) are located on both sides of the worm gear (21) on the drive shaft (28).

10. The electric lifting mechanism for the lawnmower chassis according to claim 1, characterized in that, The chassis (10) includes a bottom shell (102) and a top cover, which are fastened together to form a receiving cavity. The drive motor (20), worm gear (21), worm (22), and rotating plate (23) are located in the receiving cavity.

Images