Height adjustment device and mower

Abstract

This utility model provides a height adjustment device and a lawnmower, relating to the field of lawnmowers. The height adjustment device provided by this utility model automatically adjusts the mowing height of the actuator by setting an adjustment component, resulting in high work efficiency. By setting a sensor and a detection component, the detection component can sense the distance between the actuator and the adjustment component. On the one hand, compared to the prior art where the detection component is placed to the side of the sensor, this application places the detection component directly above the sensor, reducing the detection distance between the sensor and the detection component, lowering the detection error of the detection component, and allowing the detection component to more accurately sense the distance between the actuator and the adjustment component, thereby achieving precise control of the mowing height of the actuator. This height adjustment device has a simple structure, high detection accuracy, and small footprint.

Description

Technical Field

[0001] This utility model relates to the field of lawnmower technology, and more specifically, to a height adjustment device and a lawnmower. Background Technology

[0002] In related technologies, lawnmowers primarily cut grass using high-speed rotating blades housed within a blade disc enclosure located beneath the mower. During the mowing process, the height of the blade disc needs to be adjusted according to the desired cutting depth.

[0003] Currently, the control methods for adjusting the height of the cutter head are mostly manual adjustment or electric adjustment via a height adjustment device. In actual height adjustment, the height adjustment detection method of the height adjustment device is usually detected by a Hall sensor installed on the side. This method has problems such as large detection error and low height adjustment accuracy. It has certain limitations in daily use, low overall intelligence level, and cannot meet the complex usage needs of users. Utility Model Content

[0004] The purpose of this utility model is to provide a height adjustment device and a lawnmower, which can automatically adjust the mowing height of the actuator and also accurately control the mowing height of the actuator.

[0005] The embodiments of this utility model can be implemented as follows:

[0006] In a first aspect, this utility model provides a height adjustment device, comprising:

[0007] An execution component, wherein a sensor is provided on the top of the execution component;

[0008] An adjustment component, comprising an adjustment drive component, wherein the adjustment drive component is connected to the execution component in a transmission manner, and the adjustment drive component is used to drive the execution component to move up and down;

[0009] A detection element is disposed on the adjustment assembly and located above the sensing element. The detection element is communicatively connected to the adjustment drive element. The detection element is used to sense and detect the distance between the execution assembly and the adjustment assembly through the sensing element.

[0010] In an optional embodiment, the sensing element and the detection element are coaxially arranged.

[0011] In an optional implementation, the detection element includes at least a Hall sensor;

[0012] The sensing element includes at least a magnetic element.

[0013] In an optional embodiment, the outer wall of the execution component is provided with a connecting portion, and the connecting portion is provided with a connecting hole;

[0014] The adjustment assembly also includes a transmission component, one end of which is connected to the connection hole, and the other end is connected to the output end of the adjustment drive component.

[0015] In an optional embodiment, the transmission component is threadedly connected to the connecting hole;

[0016] The outer wall of the transmission component is provided with an external thread, and the connecting hole is provided with an internal thread that mates with the external thread; or, the outer wall of the transmission component is provided with an external thread, and the connecting hole is provided with a threaded bushing, and the transmission component passes through the threaded bushing and is threadedly connected to the threaded bushing.

[0017] In an optional embodiment, the threaded bushing includes a first shaft and a second shaft connected to each other, the first shaft passing through the connecting hole, the second shaft being located at the bottom of the connecting portion and the top wall of the second shaft abutting against the bottom wall of the connecting portion;

[0018] The first shaft and the second shaft connected to each other are provided with inner holes, and the inner holes are provided with internal threads that are threadedly connected to the external threads.

[0019] In an optional embodiment, the adjustment assembly includes an adjustment housing, an adjustment drive fixed to the adjustment housing, a transmission component disposed inside the adjustment housing, a mounting base provided inside the adjustment housing, a first mounting port provided on the mounting base, the mounting base being located above the connecting portion, and the first mounting port being coaxially disposed with the connecting hole;

[0020] The first mounting port is provided with a first bearing, and the top end of the transmission component passes through the first bearing and is connected to the output end of the adjustment drive component.

[0021] In an optional embodiment, the bottom of the adjusting housing is provided with a second mounting port, which is coaxially arranged with the connecting hole;

[0022] The bottom end of the transmission component is fixed with a second bearing, which is confined within the second mounting port.

[0023] In an optional embodiment, the execution component includes an execution housing and an execution member disposed at the bottom of the execution housing. The connecting portion is disposed on the outer wall of the execution housing, and an execution drive member is disposed inside the execution housing. The output end of the execution drive member passes through the bottom of the execution housing and is connected to the execution member in a transmission manner.

[0024] The adjustment assembly further includes an adjustment housing, an adjustment drive fixed to the adjustment housing, a transmission component disposed inside the adjustment housing, an opening at the bottom of the adjustment housing, an execution housing located inside the adjustment housing with its lower part penetrating through the opening, a sealing element provided at the opening, and the sealing element being sealed to the outer wall of the execution housing.

[0025] Secondly, this utility model provides a lawnmower, including: a lawnmower body;

[0026] The height adjustment device according to any of the foregoing embodiments, wherein the adjustment component is connected to the lawnmower body.

[0027] The beneficial effects of the height adjustment device and lawnmower provided in this embodiment of the invention include:

[0028] By setting an adjustment component, the mowing height of the execution component can be automatically adjusted, resulting in high work efficiency. By setting a sensor and a detection component, the detection component can sense the distance between the execution component and the adjustment component. On the one hand, compared with the prior art that places the detection component to the side of the sensor, this application places the detection component directly above the sensor, reducing the detection distance between the sensor and the detection component, reducing the detection error of the detection component, and allowing the detection component to more accurately sense the distance between the execution component and the adjustment component, thereby achieving precise control of the mowing height of the execution component. On the other hand, the height adjustment device has an origin positioning function, that is, the adjustment drive component can drive the execution component to automatically return to the initial position, meeting the complex usage needs of users and making the lawnmower more intelligent. At the same time, the height adjustment device with this setting has a simple structure, high detection accuracy, small space occupation, and no noise is generated during the height adjustment process of the execution component, thus optimizing the NVH performance of the lawnmower. Attached Figure Description

[0029] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 This is a schematic diagram of the structure of the execution component provided in this embodiment;

[0031] Figure 2 This is a schematic diagram of the height adjustment device provided in this embodiment;

[0032] Figure 3This is a partial sectional view of the threaded bushing provided in this embodiment;

[0033] Figure 4 This is a partial cross-sectional view of the detection element and sensing element provided in this embodiment.

[0034] Icons: 010-Height adjustment device; 100-Actuation component; 110-Connecting part; 111-Connecting hole; 120-Actuation housing; 121-Upper actuation housing; 122-Lower actuation housing; 130-Actuation drive component; 140-Actuation component; 141-Tool holder; 142-Tool disc; 150-Cutting component; 151-Cutting connector; 160-Guard; 170-First rubber sleeve; 200-Detection component; 210-Sensing component; 300 - Adjustment assembly; 310 - Adjustment housing; 311 - Upper adjustment housing; 312 - Lower adjustment housing; 313 - Opening; 314 - Seal; 315 - Mounting base; 316 - Second mounting port; 317 - Second rubber sleeve; 320 - Adjustment drive component; 321 - Coupling; 330 - Transmission component; 340 - Threaded bushing; 341 - First shaft; 342 - Second shaft; 350 - First bearing; 360 - Second bearing. Detailed Implementation

[0035] 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. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0036] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0037] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0038] In the description of this utility model, it should be noted that if terms such as "upper," "lower," "inner," or "outer" are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the utility model product is usually placed during use, they are only for the convenience of describing this utility model 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, and therefore should not be construed as a limitation of this utility model.

[0039] Furthermore, the terms "first" and "second" are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0040] It should be noted that, where there is no conflict, the features in the embodiments of this utility model can be combined with each other.

[0041] The following describes in detail the overall structure, working principle, and technical effects of the height adjustment device 010 and lawnmower provided by this utility model through embodiments and in conjunction with the accompanying drawings.

[0042] Please refer to Figure 2 The height adjustment device 010 provided by this utility model is applied in a lawnmower to adjust the height of the lawnmower's execution component 100.

[0043] The present invention provides a lawnmower, comprising: a lawnmower body and a height adjustment device 010, wherein the adjustment component 300 is connected to the lawnmower body.

[0044] The actuator 100 of the lawnmower is a cutting disc 142 assembly for cutting grass. The height adjustment device 010 is located at the bottom of the lawnmower body in the forward direction of the lawnmower, allowing the actuator 100 to be positioned at the bottom of the lawnmower body and perform the cutting action.

[0045] Optionally, multiple height adjustment devices 010 can be provided; multiple height adjustment devices 010 can be spaced apart at the bottom of the lawnmower body so that multiple actuators 100 can perform lawn mowing actions synchronously, resulting in high lawn mowing efficiency.

[0046] Of course, in other embodiments, the height adjustment device 010 can also be applied to other structures that require automatic height adjustment.

[0047] Please refer to Figures 1-2 The height adjustment device 010 proposed in the utility model includes:

[0048] An execution component 100 is provided with a sensor 210 on its top;

[0049] Adjustment component 300 includes adjustment drive component 320, which is connected to execution component 100 for transmission. Adjustment drive component 320 is used to drive execution component 100 to move up and down.

[0050] The detection element 200 is disposed on the adjustment component 300 and located above the sensing element 210. The detection element 200 is communicatively connected to the adjustment drive component 320. The detection element 200 is used to sense and detect the distance between the execution component 100 and the adjustment component 300 through the sensing element 210.

[0051] It is understood that the mowing height of the actuator 100 is its height relative to the ground. When the user adjusts the mowing height to the designed mowing height, the adjustment drive 320 drives the actuator 100 to move up and down relative to the adjustment component 300 via the transmission component 330, thereby adjusting the mowing height of the actuator 100. Furthermore, the detection component 200 confirms whether the mowing height of the actuator 100 has been adjusted to the designed mowing height based on the detected distance between the actuator 100 and the adjustment housing 310.

[0052] Furthermore, the height adjustment device 010 has an origin positioning function; that is, when the lawnmower experiences an abnormal power outage, after the device is powered on again, the adjustment drive 320 and the detection component 200 are powered on. Based on the distance between the execution component 100 and the adjustment housing 310 detected by the detection component 200, the adjustment drive 320 automatically drives the execution component 100 to adjust its height, restoring the mowing height of the execution component 100 to the initial mowing height, which can also be understood as the execution component 100 returning to its initial position.

[0053] Therefore, this utility model, by setting the adjustment component 300, achieves automatic adjustment of the mowing height of the execution component 100, resulting in high work efficiency. By setting the sensor 210 and the detection component 200, the detection component 200 can sense the distance between the execution component 100 and the adjustment component 300 through the sensor 210. On the one hand, compared to the prior art where the detection component 200 is positioned to the side of the sensor 210, this application positions the detection component 200 directly above the sensor 210, reducing the detection distance between the sensor 210 and the detection component 200, lowering the detection error of the detection component 200, and allowing for more accurate detection. The ground sensor detects the distance between the actuator 100 and the adjustment component 300, thereby enabling precise control of the mowing height of the actuator 100. On the other hand, it enables the height adjustment device 010 to have an origin positioning function, that is, the adjustment drive 320 can drive the actuator 100 to automatically return to the initial position, meeting the complex usage needs of users and making the lawnmower more intelligent. At the same time, the height adjustment device 010 with this setting has a simple structure, occupies little space, and generates no noise during the height adjustment process of the actuator 100, thus optimizing the NVH (Noise, Vibration, Harshness) performance of the lawnmower.

[0054] In this embodiment, the height adjustment device 010 includes an execution component 100.

[0055] In this embodiment, please refer to Figure 1 The execution component 100 is a cutting disc 142 assembly for mowing grass. Therefore, the execution component 100 includes an execution housing 120 and an execution member 140 disposed at the bottom of the execution housing 120; a connecting portion 110 is provided on the outer wall of the execution housing 120, and an execution drive member 130 is provided inside the execution housing 120. The output end of the execution drive member 130 passes through the bottom of the execution housing 120 and is connected to the execution member 140 in a transmission manner; a cutting member 150 is provided at the bottom of the execution member 140, and the cutting member 150 is rotatably disposed.

[0056] The bottom of the actuator housing 120 is also provided with a protective cover 160, the edge of which extends downwards to house the actuator 140 and the cutting element 150 within the protective cover 160. It is understood that the protective cover 160 is used to protect the actuator 140 and the cutting element 150 within the protective cover 160, preventing the cutting element 150 from colliding with obstacles during operation, preventing the cutting element 150 from flying out in the event of a lawnmower malfunction, and also blocking weeds from flying around.

[0057] Alternatively, please refer to Figure 1The execution housing 120 includes an upper execution housing 121 and a lower execution housing 122 that are detachably connected. A connecting portion 110 extends from one side wall of the lower execution housing 122. An execution member 140 is disposed at the bottom of the lower execution housing 122. The output end of the execution drive member 130 passes through the bottom of the lower execution housing 122 and is connected to the execution member 140 in a transmission manner.

[0058] The upper actuator housing 121 and the lower actuator housing 122 can be detachably connected by a threaded connection.

[0059] Please refer to Figure 1 The top of the upper actuator housing 121 is provided with a first wiring port, and a first rubber sleeve 170 is provided at the first wiring port. The first rubber sleeve 170 is used to bind the wiring harness of the actuator 100 to prevent the wiring harness from falling apart and to facilitate wiring.

[0060] Understandably, this design of the execution housing 120 facilitates overall disassembly and maintenance.

[0061] Alternatively, please refer to Figure 1 The actuator 140 includes a detachably connected tool holder 141 and a tool disc 142. The tool holder 141 is connected to the output shaft at the output end of the actuator 130. The disc-shaped tool disc 142 is fixed to the bottom of the tool holder 141. A cutting element 150 is provided at the bottom of the tool disc 142, and the cutting element 150 is rotatably disposed.

[0062] There can be multiple cutting elements 150, which are arranged along the outer edge of the cutter head 142 and are set at equal angles with the center of the cutter head 142 as the center.

[0063] The tool holder 141 and the tool disc 142 can be detachably connected by a threaded connection.

[0064] Understandably, this design of the drive components facilitates overall disassembly and maintenance.

[0065] Optionally, the cutting element 150 is rotatably mounted on the bottom of the drive member via a cutting connector 151 such as bolts, wherein the cutting element 150 can rotate independently around the cutting connector 151.

[0066] Optionally, the actuator 130 can be a motor.

[0067] It is understandable that when the execution component 100 performs the lawn mowing task, the output end of the execution drive component 130 drives the execution component 140 to rotate, and at the same time the drive component drives the cutting component 150 to perform synchronous selection. At this time, the cutting component 150 has a certain kinetic energy, thereby realizing the lawn mowing action.

[0068] In this embodiment, the height adjustment device 010 includes a detection element 200.

[0069] The detection element 200 is disposed on the adjustment component 300 and located above the sensing element 210. The detection element 200 is communicatively connected to the adjustment drive component 320. The detection element 200 is used to sense and detect the distance between the execution component 100 and the adjustment component 300 through the sensing element 210.

[0070] In this embodiment, please refer to Figure 2 and Figure 4 The sensing element 210 and the detection element 200 are coaxially arranged. It can be understood that the detection element 200 is positioned above the sensing element 210 and coaxially, meaning the detection element 200 is directly above the sensing element 210. This arrangement minimizes the straight-line distance between the detection element 200 and the sensing element 210, allowing the detection element 200 to more accurately sense the distance between the detection execution component 100 and the adjustment component 300.

[0071] In this embodiment, the top of the adjusting housing 310 is provided with a first mounting portion for mounting the detection element 200; correspondingly, the top of the upper execution housing 121 of the execution assembly 100 is also provided with a second mounting portion for mounting the sensing element 210, and the first mounting portion is located directly above the second mounting portion.

[0072] The first mounting part has a vertical mounting hole that penetrates the first mounting part, the detection element 200 is disposed in the mounting hole, and the detection end of the detection element 200 is disposed facing the sensing element 210.

[0073] In this embodiment, the detection element 200 includes a Hall sensor, and the sensing element 210 includes a magnetic element, which can be a magnet or an armature.

[0074] The mowing height of the execution component 100 is its height relative to the ground, or its height above the ground. Users can adjust the mowing height according to their needs.

[0075] It is understandable that the detection element 200 detects the distance between itself and the sensing element 210 by sensing the strength of the magnetic field generated by the sensing element 210, which can also be understood as the distance between the execution component 100 and the adjustment housing 310. When the user adjusts the mowing height to the designed mowing height according to actual needs, the adjustment drive 320 drives the execution component 100 to adjust the height. The detection element 200 confirms whether the mowing height of the execution component 100 has been adjusted to the designed mowing height based on the detected distance between the execution component 100 and the adjustment housing 310.

[0076] Furthermore, when the lawnmower experiences an abnormal power outage, after the device is powered on again, the adjustment drive 320 and the detection component 200 are powered on. The adjustment drive 320 drives the execution component 100 to adjust its height. Based on the distance between the detection component 200 and the sensing component 210 detected by the detection component 200 according to the strength of the magnetic field, the adjustment drive 320 automatically drives the execution component 100 to adjust its height, restoring the mowing height of the execution component 100 to the initial mowing height, which can also be understood as the execution component 100 returning to its initial position.

[0077] In summary, by setting up the detection element 200 and the sensing element 210, the detection element 200 can determine the distance between the detection element 200 and the sensing element 210 based on the strength of the magnetic field, that is, the distance between the execution component 100 and the adjustment housing 310. This setting, on the one hand, enables precise control of the mowing height of the execution component 100, and on the other hand, enables the height adjustment device 010 to have an origin positioning function, that is, the adjustment drive element 320 can drive the execution component 100 to automatically return to the initial position, which meets the complex usage needs of users and makes the lawnmower more intelligent.

[0078] Of course, in other embodiments, the detection element 200 can also be an infrared sensor or other structure. The sensing element 210 can be any one of a groove, protrusion, or hole provided on the execution housing 120, and there are no other structures obstructing the detection element 200 and the sensing element 210.

[0079] In this embodiment, the height adjustment device 010 includes an adjustment component 300.

[0080] The adjustment component 300 is used to adjust the height of the execution component 100. The adjustment component 300 includes an adjustment drive component 320 and a transmission component 330. One end of the transmission component 330 is connected to the connection hole 111, and the other end is connected to the output end of the adjustment drive component 320.

[0081] In this embodiment, please refer to Figure 2 The adjustment assembly 300 also includes an adjustment housing 310, an adjustment drive 320 fixed to the top of the adjustment housing 310, a transmission component 330 disposed inside the adjustment housing 310, and an output shaft provided at the output end of the adjustment drive 320. The output shaft passes through the adjustment housing 310 and is connected to the other end of the transmission component 330 via a coupling 321.

[0082] In this embodiment, the bottom of the adjusting housing 310 is provided with an opening, the executing housing 120 is located inside the adjusting housing 310, and the lower part of the executing housing 120 has a through opening. A sealing member 314 is provided at the opening, and the sealing member 314 is sealed to the outer wall of the executing housing 120.

[0083] Optionally, the seal 314 can be a sealing ring, a dustproof sealing ring, etc.

[0084] Understandably, by setting a seal 314 at the opening, not only are foreign objects prevented from entering the interior of the regulating housing 310, but the execution housing 120 of the actuator 100 is also effectively supported, improving the stability of the equipment. At the same time, when the execution housing 120 is working, the seal 314 provides effective support for the execution housing 120, reducing the vibration and noise of the entire equipment, and significantly improving the NVH (Noise, Vibration, Harshness) performance compared with similar products.

[0085] In one embodiment, the transmission member 330 is fixed to the connecting hole 111; then the output end of the adjusting drive member 320 drives the transmission member 330 to extend downward or retract upward, thereby adjusting the height of the execution component 100. Optionally, the adjusting drive member 320 is a linear motor.

[0086] In this embodiment, the transmission component 330 is threadedly connected to the connecting hole 111.

[0087] Understandably, the output of the adjusting drive 320 drives the transmission 330 to rotate in the forward or reverse direction, while the connecting part 110 and the actuating component 100 can only move upward or downward along the axial direction of the transmission 330. The transmission 330 and the connecting part 110 are connected by a threaded connection through the connecting hole 111, achieving thread self-locking when the helix angle is less than the equivalent friction angle. This design of the height adjustment device 010 provides a self-locking function, ensuring the actuating component 100 remains stable at the mowing height, thus maintaining its stability. Simultaneously, the adjusting drive 320 does not need to be continuously powered, reducing the power consumption of the equipment.

[0088] Optionally, the adjustment drive 320 can be a rotary motor, in which case the adjustment drive 320 drives the transmission component 330 to rotate.

[0089] In this embodiment, the transmission component 330 is threadedly connected to the threaded bushing 340 at the connecting hole 111. The outer wall of the transmission component 330 is provided with external threads, and the threaded bushing 340 is provided in the connecting hole 111. The transmission component 330 passes through the threaded bushing 340 and is threadedly connected to the threaded bushing 340.

[0090] In this embodiment, please refer to Figure 3 The threaded bushing 340 includes a first shaft 341 and a second shaft 342 connected to each other. The first shaft 341 passes through the connecting hole 111, and the second shaft 342 is located at the bottom of the connecting part 110 and the top wall of the second shaft 342 abuts against the bottom wall of the connecting part 110. The first shaft 341 and the second shaft 342 connected to each other are provided with an inner hole, and the inner hole is provided with an internal thread that is threaded to the external thread.

[0091] Of course, in an optional embodiment, the transmission component 330 can also be directly threaded to the connecting hole 111. The outer wall of the transmission component 330 is provided with external threads, and the connecting hole 111 is provided with internal threads that mate with the external threads.

[0092] In this embodiment, please refer to Figure 2 The adjusting housing 310 has a mounting base 315 inside, and the mounting base 315 has a first mounting port. The mounting base 315 is located above the connecting part 110. The first mounting port is coaxially arranged with the connecting hole 111. The first mounting port is provided with a first bearing 350. The top end of the transmission member 330 passes through the first bearing 350 and is connected to the output end of the adjusting drive member 320 through the coupling 321.

[0093] In this embodiment, please refer to Figure 2 The bottom of the adjusting housing 310 is provided with a second mounting port 316, which is coaxially arranged with the connecting hole 111; the bottom end of the transmission component 330 is fixed with a second bearing 360, which can be fitted into the second mounting port 316.

[0094] Understandably, when the axial movement range of the adjusting drive 320 along the transmission 330 becomes abnormal, the contact between the threaded bushing 340 and the inner ring of the first bearing 350 or the second bearing 360 will not affect the rotation of the transmission 330, thus avoiding the phenomenon of the adjusting drive 320 becoming stuck. When the adjusting drive 320 rotates in the opposite direction and moves upward along the transmission 330 to the limit position, the threaded bushing 340 contacts the inner ring of the first bearing 350, and the actuator 100 can still move normally without jamming, thus avoiding the need for disassembly and maintenance of the entire mechanism due to hardware problems.

[0095] Therefore, by providing the first bearing 350 and the second bearing 360 in the first mounting hole, the range of axial movement of the connecting part 110 and the driving member along the transmission member 330 can be limited. When the height adjustment device 010 malfunctions, the phenomenon of the height adjustment device 010 stalling and jamming can be avoided, and the stability and reliability of the height adjustment device 010 are also improved.

[0096] In this embodiment, please refer to Figure 2 The adjusting housing 310 includes an upper adjusting housing 311 and a lower adjusting housing 312 that are detachably connected; the adjusting drive component 320 and the detection component 200 are both disposed on the top of the upper adjusting housing 311, and the mounting base 315 is disposed on the inner wall of the upper adjusting housing 311; the bottom wall of the lower adjusting housing 312 is provided with an opening and a second mounting port 316.

[0097] Please refer to Figure 2 The top of the upper adjustment housing 311 is provided with a second wiring port, and a second rubber sleeve 317 is provided at the second wiring port. The first rubber sleeve 170 and the second rubber sleeve 317 are used to bind the wiring harness of the actuator 100 to prevent the wiring harness from falling apart and to facilitate wiring.

[0098] The upper adjusting housing 311 and the lower adjusting housing 312 can be detachably connected by a threaded connection.

[0099] The working principle and process of the height adjustment device 010 and lawnmower provided in this embodiment of the utility model are as follows:

[0100] If the output end of the adjusting drive 320 drives the transmission 330 to rotate in the forward direction via the coupling 321, and the connecting part 110 and the execution component 100 can only move upward along the axial direction of the transmission 330, then the mowing height of the execution component 100 is adjusted to the designed mowing height. If the output end of the adjusting drive 320 drives the transmission 330 to rotate in the reverse direction via the coupling 321, and the connecting part 110 and the execution component 100 can only move downward along the axial direction of the transmission 330, then the mowing height of the execution component 100 is adjusted to the designed mowing height.

[0101] The detection component 200 determines whether the mowing height of the execution component 100 has been adjusted to the designed mowing height based on the detected distance between the execution component 100 and the adjustment housing 310.

[0102] In summary, the height adjustment device 010 and lawnmower provided in this embodiment of the present invention, by setting the adjustment component 300, achieve automatic adjustment of the mowing height of the execution component 100, resulting in high work efficiency; by setting the sensor 210 and the detection component 200, the detection component 200 can sense the distance between the execution component 100 and the adjustment component 300 through the sensor 210. On the one hand, compared with the prior art that sets the detection component 200 to the side of the sensor 210, this application sets the detection component 200 directly above the sensor 210, reducing the detection distance between the sensor 210 and the detection component 200, and reducing the cost. The detection error of the detection component 200 allows it to more accurately sense the distance between the execution component 100 and the adjustment component 300, thereby achieving precise control of the mowing height of the execution component 100. On the other hand, it enables the height adjustment device 010 to have an origin positioning function, that is, the adjustment drive component 320 can drive the execution component 100 to automatically return to the initial position, meeting the complex usage needs of users and making the lawnmower more intelligent. At the same time, the height adjustment device 010 with this setting has a simple structure, high detection accuracy, small space occupation, and no noise is generated during the height adjustment process of the execution component 100, thus optimizing the NVH performance of the lawnmower.

[0103] Furthermore, the detection element 200 is positioned directly above the sensing element 210. This arrangement minimizes the straight-line distance between the detection element 200 and the sensing element 210, allowing the detection element 200 to more accurately sense the distance between the detection execution component 100 and the adjustment component 300.

[0104] The above are merely specific embodiments of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model.

Claims

1. A height adjustment device, characterized in that, include: An execution component, wherein a sensor is provided on the top of the execution component; An adjustment component, comprising an adjustment drive component, wherein the adjustment drive component is connected to the execution component in a transmission manner, and the adjustment drive component is used to drive the execution component to move up and down; A detection element is disposed on the adjustment assembly and located above the sensing element. The detection element is communicatively connected to the adjustment drive element. The detection element is used to sense and detect the distance between the execution assembly and the adjustment assembly through the sensing element.

2. The height adjustment device according to claim 1, characterized in that, The sensing element and the detection element are arranged coaxially.

3. The height adjustment device according to claim 1, characterized in that, The detection element includes at least a Hall sensor; The sensing element includes at least a magnetic element.

4. The height adjustment device according to claim 1, characterized in that, The outer wall of the execution component is provided with a connecting part, and the connecting part is provided with a connecting hole; The adjustment assembly also includes a transmission component, one end of which is connected to the connection hole, and the other end is connected to the output end of the adjustment drive component.

5. The height adjustment device according to claim 4, characterized in that, The transmission component is threadedly connected to the connecting hole; The outer wall of the transmission component is provided with an external thread, and the connecting hole is provided with an internal thread that mates with the external thread; or, the outer wall of the transmission component is provided with an external thread, and the connecting hole is provided with a threaded bushing, and the transmission component passes through the threaded bushing and is threadedly connected to the threaded bushing.

6. The height adjustment device according to claim 5, characterized in that, The threaded bushing includes a first shaft and a second shaft connected to each other. The first shaft passes through the connecting hole, and the second shaft is located at the bottom of the connecting part, with the top wall of the second shaft abutting against the bottom wall of the connecting part. The first shaft and the second shaft connected to each other are provided with inner holes, and the inner holes are provided with internal threads that are threadedly connected to the external threads.

7. The height adjustment device according to claim 4, characterized in that, The adjustment assembly includes an adjustment housing, an adjustment drive fixed to the adjustment housing, a transmission component disposed inside the adjustment housing, a mounting base disposed inside the adjustment housing, a first mounting port disposed on the mounting base, the mounting base being located above the connecting portion, and the first mounting port being coaxially disposed with the connecting hole; The first mounting port is provided with a first bearing, and the top end of the transmission component passes through the first bearing and is connected to the output end of the adjustment drive component.

8. The height adjustment device according to claim 7, characterized in that, The bottom of the adjusting housing is provided with a second mounting port, which is coaxially arranged with the connecting hole; The bottom end of the transmission component is fixed with a second bearing, which is confined within the second mounting port.

9. The height adjustment device according to claim 4, characterized in that, The execution component includes an execution housing and an execution element disposed at the bottom of the execution housing. The connecting portion is provided on the outer wall of the execution housing, and an execution drive element is provided inside the execution housing. The output end of the execution drive element passes through the bottom of the execution housing and is connected to the execution element in a transmission manner. The adjustment assembly further includes an adjustment housing, an adjustment drive fixed to the adjustment housing, a transmission component disposed inside the adjustment housing, an opening at the bottom of the adjustment housing, an execution housing located inside the adjustment housing with its lower part penetrating through the opening, a sealing element provided at the opening, and the sealing element being sealed to the outer wall of the execution housing.

10. A lawnmower, characterized in that, include: Lawn mower body; The height adjustment device according to any one of claims 1-9, wherein the adjustment component is connected to the lawnmower body.

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