Height adjustment device and mower

Abstract

The embodiment of the utility model provides a kind of height adjusting device and mower, it is related to the field of mower.The utility model provides a kind of height adjusting device, setting adjusting assembly, it is realized to the height of execution component's mowing is automatically regulated, and work efficiency is high;By setting shaft connecting piece and at least one bearing, to make in the condition that adjusting assembly drives execution component to move to limit position, when adjusting assembly drive execution component continues to move and be abnormal, shaft connecting piece and the inner ring of at least one bearing abut contact, can prevent regulating drive piece and occur blocked rotation;Simultaneously, in the condition that adjusting assembly drives execution component to move to limit position, when regulating drive piece reversely rotates, mower can also be able to normally move, will not appear jamming phenomenon, can avoid hardware problem and the disassembly maintenance of entire mechanism, improve the stability reliability of height adjusting device.

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] A lawnmower primarily cuts grass using high-speed rotating blades housed in a blade disc enclosure located beneath the machine. The height of the blade disc needs to be adjusted according to the desired cutting depth during the weeding process.

[0003] The lawnmowers in the related technology use a height adjustment device with a motor and a threaded rod to change the mowing height; however, if the height adjustment device malfunctions while the motor is driving the threaded rod to rotate, it may stall and become stuck. Utility Model Content

[0004] The purpose of this invention is to provide a height adjustment device and a lawnmower that can prevent the adjustment drive from stalling and jamming.

[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 connecting portion is provided on the outer wall of the execution component, and a shaft connector is provided on the connecting portion;

[0008] An adjustment assembly, comprising an adjustment drive and a transmission component, wherein one end of the transmission component passes through the shaft connector and is threadedly connected to the shaft connector, and the other end is drively connected to the output end of the adjustment drive.

[0009] The adjusting assembly is provided with at least one bearing coaxially arranged with the shaft connector, and the transmission member passes through the at least one bearing so that, when the adjusting assembly drives the actuating assembly to move to the limit position, the shaft connector abuts against the inner ring of the at least one bearing.

[0010] In an optional embodiment, the adjusting assembly is provided with two bearings, which are a first bearing and a second bearing, respectively.

[0011] The first bearing is located above the shaft connector so that, when the adjusting component drives the actuating component to move upward to its limit position, the shaft connector abuts against the inner ring of the first bearing.

[0012] The second bearing is located below the shaft connector so that, when the adjusting assembly drives the actuating assembly to move downward to its limit position, the shaft connector abuts against the inner ring of the second bearing.

[0013] In an optional embodiment, the outer wall of the transmission component is provided with external threads, the connecting part is provided with a connecting hole, and the shaft connector is disposed in the connecting hole;

[0014] The shaft connector 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. The first shaft and the second shaft are provided with inner holes, and the inner holes are provided with internal threads that are threadedly connected to the external threads.

[0015] When the adjusting component drives the actuating component to move upward to its limit position, the first shaft end of the shaft connector abuts against the inner ring of the first bearing.

[0016] When the adjusting component drives the actuating component to move downward to its limit position, the second shaft end of the shaft connector abuts against the inner ring of the second bearing.

[0017] 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, and the mounting base located above the connecting portion;

[0018] The at least one bearing includes a first bearing, the first mounting port is provided with the first bearing, and the top end of the transmission member passes through the first bearing and is connected to the output end of the adjustment drive member for transmission.

[0019] When the adjusting component drives the actuating component to move upward to its limit position, the shaft connector abuts against the inner ring of the first bearing.

[0020] In an optional embodiment, the adjustment assembly includes an adjustment housing, the adjustment drive is fixed to the adjustment housing, the transmission component is disposed inside the adjustment housing, and the inner bottom wall of the adjustment housing is provided with a second mounting port;

[0021] The at least one bearing includes a second bearing, the bottom end of the transmission member is fixed to the second bearing, and the second bearing is confined within the second mounting port;

[0022] When the adjusting component drives the actuating component to move downward to its limit position, the shaft connector abuts against the inner ring of the second bearing.

[0023] In an optional embodiment, the adjustment assembly includes an adjustment housing, the adjustment drive is fixed to the top of the adjustment housing, the transmission component is disposed inside the adjustment housing, the output end of the adjustment drive is provided with an output shaft, the output shaft passes through the adjustment housing and is connected to the other end of the transmission component via a coupling.

[0024] In an optional embodiment, the top of the actuating component is provided with a magnetic element, and the top of the adjusting component is provided with a positioning element relative to the magnetic element;

[0025] The positioning element includes at least a Hall sensor, which senses and detects the distance between the actuating component and the adjusting component through the magnetic element.

[0026] 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.

[0027] 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.

[0028] 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.

[0029] The bottom of the actuator is provided with a cutting component, which is rotatably mounted;

[0030] The bottom of the actuator housing is also provided with a protective cover, the edge of which extends to the bottom so that the actuator and the cutting element are located inside the protective cover.

[0031] Secondly, this utility model provides a lawnmower, including: a lawnmower body;

[0032] The height adjustment device according to any of the foregoing embodiments, wherein the adjustment component is connected to the lawnmower body.

[0033] The beneficial effects of the height adjustment device and lawnmower provided in this embodiment of the invention include:

[0034] An adjustment component is installed to automatically adjust the mowing height of the actuator, resulting in high work efficiency. By incorporating a shaft connector and at least one bearing, if the adjustment component drives the actuator to its limit position and then malfunctions, the shaft connector abuts against the inner ring of at least one bearing to prevent the adjustment drive from stalling. Furthermore, even when the adjustment drive rotates in the opposite direction after reaching its limit position, the mower can still move normally without jamming, avoiding the need for disassembly and maintenance of the entire mechanism due to hardware issues and improving the stability and reliability of the height adjustment device. Attached Figure Description

[0035] 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.

[0036] Figure 1 This is a schematic diagram of the structure of the execution component provided in this embodiment;

[0037] Figure 2 This is a schematic diagram of the height adjustment device provided in this embodiment;

[0038] Figure 3 This is a cross-sectional view of the shaft connector provided in this embodiment.

[0039] Icons: 010-Height adjustment device; 100-Actuating component; 110-Connecting part; 111-Connecting hole; 120-Actuating housing; 121-Upper actuating housing; 122-Lower actuating housing; 130-Actuating drive component; 140-Actuating component; 141-Tool holder; 142-Tool disc; 150-Cutting component; 151-Cutting connector; 160-Guard; 170-First rubber sleeve; 200-Positioning component; 210-Magnetic 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 - Shaft connector; 341 - First shaft; 342 - Second shaft; 350 - First bearing; 360 - Second bearing. Detailed Implementation

[0040] 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.

[0041] 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.

[0042] 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.

[0043] 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.

[0044] Furthermore, the terms "first" and "second" are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0045] 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.

[0046] 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.

[0047] 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.

[0048] 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.

[0049] 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.

[0050] 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.

[0051] Of course, in other embodiments, the height adjustment device 010 can also be applied to other structures that require automatic height adjustment.

[0052] Please refer to Figures 1-2 The height adjustment device 010 proposed in the utility model includes:

[0053] An execution component 100 is provided with a connecting part 110 on its outer wall, and a shaft connector 340 is provided on the connecting part 110.

[0054] The adjustment assembly 300 includes an adjustment drive 320 and a transmission component 330. One end of the transmission component 330 passes through the shaft connector 340 and is threadedly connected to the shaft connector 340, and the other end is connected to the output end of the adjustment drive 320.

[0055] The adjusting assembly 300 is provided with at least one bearing coaxially arranged with the shaft connector 340, and the transmission member 330 passes through the at least one bearing so that when the adjusting assembly 300 drives the actuating assembly 100 to move to the limit position, the shaft connector 340 abuts against the inner ring of the at least one bearing.

[0056] 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 height, the adjustment drive 320, through the transmission component 330, drives the actuator 100 to move up and down relative to the adjustment component 300, thereby adjusting the mowing height of the actuator 100. Furthermore, when the adjustment component 300 drives the actuator 100 to its limit position, if an abnormality occurs when the adjustment drive 320 drives the actuator 100 and the shaft connector 340 to their limit position and continues to move abnormally, the shaft connector 340 abuts against the inner ring of at least one bearing, preventing the adjustment drive 320 from stalling.

[0057] Therefore, this utility model achieves automatic adjustment of the mowing height of the execution component 100 by setting the adjustment component 300, resulting in high work efficiency. By setting the shaft connector 340 and at least one bearing, when the adjustment component 300 drives the execution component 100 to move to its limit position, if the adjustment component 300 drives the execution component 100 to continue moving abnormally, the shaft connector 340 abuts against the inner ring of at least one bearing, which can prevent the adjustment drive component 320 from stalling. At the same time, when the adjustment drive component 320 rotates in the opposite direction while the adjustment component 300 drives the execution component 100 to move to its limit position, the lawnmower can still move normally without jamming, which can avoid the need to disassemble and maintain the entire mechanism due to hardware problems, thus improving the stability and reliability of the height adjustment device 010.

[0058] In this embodiment, the height adjustment device 010 includes an execution component 100.

[0059] 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.

[0060] 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.

[0061] Alternatively, please refer to Figure 1 The 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.

[0062] The upper actuator housing 121 and the lower actuator housing 122 can be detachably connected by a threaded connection.

[0063] Please refer to Figure 1The 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.

[0064] Understandably, this design of the execution housing 120 facilitates overall disassembly and maintenance.

[0065] 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.

[0066] 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.

[0067] The tool holder 141 and the tool disc 142 can be detachably connected by a threaded connection.

[0068] Understandably, this design of the drive components facilitates overall disassembly and maintenance.

[0069] 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.

[0070] Optionally, the actuator 130 can be a motor.

[0071] 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.

[0072] In this embodiment, the height adjustment device 010 includes a positioning element 200.

[0073] The positioning element 200 is disposed on the adjustment housing 310 and located above the execution component 100. The positioning element 200 is communicatively connected to the adjustment drive component 320 and is used to detect the distance between the execution component 100 and the adjustment housing 310.

[0074] In this embodiment, please refer to Figure 2The positioning element 200 includes a Hall sensor. The top of the upper actuation housing 121 of the actuation assembly 100 is provided with a magnetic element 210, and the positioning element 200 is disposed on the top of the adjustment housing 310 and positioned relative to the magnetic element 210.

[0075] The magnetic component 210 can be a magnet or an armature.

[0076] 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.

[0077] It is understandable that the positioning component 200 can determine the distance between the positioning component 200 and the magnetic component 210 based on the strength of the magnetic field, which can also be understood as the distance between the execution component 100 and the adjustment housing 310. When the user actually needs to adjust the mowing height to the designed mowing height, the adjustment drive component 320 drives the execution component 100 to adjust the height. The positioning component 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.

[0078] Furthermore, when the lawnmower experiences an abnormal power outage, after the device is powered on again, the adjustment drive 320 and positioning component 200 are powered on. The adjustment drive 320 drives the execution component 100 to adjust its height. Based on the distance between the positioning component 200 and the magnetic component 210 detected by the positioning 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 lawnmower height of the execution component 100 to the initial lawnmower height, which can also be understood as the execution component 100 returning to its initial position.

[0079] In summary, by setting up the positioning component 200 and the magnetic component 210, the positioning component 200 can determine the distance between the positioning component 200 and the magnetic component 210 based on the strength of the magnetic field, that is, the distance between the actuator 100 and the adjusting housing 310. This setting, on the one hand, enables precise control of the mowing height of the actuator 100, and on the other hand, enables the height adjustment device 010 to have an origin positioning function, that is, the adjustment drive component 320 can drive the actuator 100 to automatically return to the initial position, which meets the complex usage needs of users and makes the lawnmower more intelligent.

[0080] Of course, in other embodiments, the positioning element 200 can also be an infrared sensor or other structure. In such cases, grooves, protrusions, holes, or other structures for positioning in conjunction with the positioning element 200 can be provided on the top of the adjusting housing 310.

[0081] In this embodiment, the height adjustment device 010 includes an adjustment component 300.

[0082] 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 passes through the shaft connector 340 and is threadedly connected to the shaft connector 340. The other end is connected to the output end of the adjustment drive component 320.

[0083] 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.

[0084] 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.

[0085] Optionally, the seal 314 can be a sealing ring, a dustproof sealing ring, etc.

[0086] 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.

[0087] In this embodiment, one end of the transmission component 330 passes through the shaft connector 340 and is threadedly connected to the shaft connector 340.

[0088] Understandably, the output of the adjusting drive 320 drives the transmission 330 to rotate in the forward or reverse direction, while the shaft connector 340 and the actuator 100 can only move axially upward or downward along the axis of the transmission 330. The transmission 330 and the shaft connector 340 of the connecting part 110 are connected by a thread for threaded transmission. When the helix angle is less than the equivalent friction angle, thread self-locking can be achieved. This configuration of the height adjustment device 010 provides a self-locking function, ensuring the actuator 100 remains stable at the mowing height and maintaining its stability. Simultaneously, the adjusting drive 320 does not need to be continuously powered, reducing the power consumption of the equipment.

[0089] Optionally, the adjustment drive 320 can be a rotary motor, in which case the adjustment drive 320 drives the transmission component 330 to rotate.

[0090] In this embodiment, the adjusting assembly 300 is provided with two bearings, namely a first bearing 350 and a second bearing 360. The first bearing 350 is located above the shaft connector 340, so that when the adjusting assembly 300 drives the actuating assembly 100 to move upward to the limit position, the shaft connector 340 abuts against the inner ring of the first bearing 350. The second bearing 360 is located below the shaft connector 340, so that when the adjusting assembly 300 drives the actuating assembly 100 to move downward to the limit position, the shaft connector 340 abuts against the inner ring of the second bearing 360.

[0091] Understandably, on the one hand, when the adjusting component 300 drives the actuating component 100 to move axially upward to its limit position, and the adjusting drive component 320 causes an abnormality in continuing to drive the actuating component 100, the shaft connector 340 abuts against the inner ring of the first bearing 350, which can prevent the adjusting drive component 320 from stalling. On the other hand, when the adjusting component 300 drives the actuating component 100 to move axially downward to its limit position, and the adjusting drive component 320 causes an abnormality in continuing to drive the actuating component 100, the shaft connector 340 abuts against the inner ring of the second bearing 360, which can prevent the adjusting drive component 320 from stalling.

[0092] In an alternative embodiment, the adjusting assembly 300 is provided with a bearing and is designated as a first bearing 350; the first bearing 350 is located above the shaft connector 340 such that when the adjusting assembly 300 drives the actuating assembly 100 to move upward to its limit position, the shaft connector 340 abuts against the inner ring of the first bearing 350.

[0093] In another alternative embodiment, the adjusting assembly 300 is provided with a bearing and is a second bearing 360; the second bearing 360 is located below the shaft connector 340 so that the shaft connector 340 abuts against the inner ring of the second bearing 360 when the adjusting assembly 300 drives the actuating assembly 100 to move downward to its limit position.

[0094] In this embodiment, the outer wall of the transmission member 330 is provided with external threads. Optionally, the transmission member 330 can be a threaded rod or the like.

[0095] In this embodiment, the connecting part 110 is provided with a connecting hole 111, and a shaft connector 340 is disposed in the connecting hole 111. Please refer to Figure 3The shaft connector 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 extends above the connecting part 110. 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.

[0096] Understandably, when the adjusting component 300 drives the actuating component 100 to move upward to its limit position, the end of the first shaft 341 of the shaft connector 340 abuts against the inner ring of the first bearing 350.

[0097] When the adjusting component 300 drives the actuating component 100 to move downward to its limit position, the end of the second shaft 342 of the shaft connector 340 abuts against the inner ring of the second bearing 360.

[0098] In this embodiment, the second shaft 342 of the shaft connector 340 is fixed to the connecting portion 110 by screws. Of course, in an optional embodiment, the shaft connector 340 and the connecting portion 110 can be integrally formed.

[0099] In this embodiment, the adjustment assembly 300 is provided with two bearings, namely the first bearing 350 and the second bearing 360; the installation method of the first bearing 350 and the second bearing 360 with the adjustment housing 310 is described in detail below.

[0100] 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.

[0101] 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; a second bearing 360 is fixed on the inner bottom wall of the transmission component 330, and the second bearing 360 is limited to the second mounting port 316.

[0102] Understandably, when the axial movement range of the adjusting drive 320 along the transmission 330 becomes abnormal, the contact between the shaft connector 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 its limit position, the contact between the shaft connector 340 and the inner ring of the first bearing 350 or the second bearing 360 will occur, 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.

[0103] 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.

[0104] 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 positioning 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.

[0105] 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.

[0106] The upper adjusting housing 311 and the lower adjusting housing 312 can be detachably connected by a threaded connection.

[0107] The working principle and process of the height adjustment device 010 and lawnmower provided in this embodiment of the utility model are as follows:

[0108] The output end of the adjusting drive 320 drives the transmission 330 to rotate forward via the coupling 321. The connecting part 110 and the actuating component 100 can only move upward along the axial direction of the transmission 330, thus adjusting the mowing height of the actuating component 100 to the designed mowing height. When the adjusting component 300 drives the actuating component 100 to move upward to its limit position, and the adjusting drive 320 drives the actuating component 100 to continue moving abnormally, the end of the first shaft 341 of the shaft connector 340 abuts against the inner ring of the first bearing 350.

[0109] The output end of the adjusting drive 320 drives the transmission 330 to rotate in the opposite direction via the coupling 321. The connecting part 110 and the actuating component 100 can only move downward along the axial direction of the transmission 330, thus adjusting the mowing height of the actuating component 100 to the designed mowing height. When the adjusting component 300 drives the actuating component 100 to move downward along the axial direction to its limit position, and the adjusting drive 320 drives the actuating component 100 to continue moving abnormally, the end of the second shaft 342 of the shaft connector 340 abuts against the inner ring of the second bearing 360.

[0110] The positioning 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.

[0111] In summary, the height adjustment device 010 and lawnmower provided in this embodiment of the present invention, with the adjustment component 300, automatically adjust the mowing height of the execution component 100, resulting in high working efficiency. By setting the shaft connector 340 and at least one bearing, when the adjustment component 300 drives the execution component 100 to move to its limit position, if the adjustment component 300 drives the execution component 100 to continue moving abnormally, the shaft connector 340 abuts against the inner ring of at least one bearing, which can prevent the adjustment drive component 320 from stalling. At the same time, when the adjustment drive component 320 rotates in the opposite direction while the adjustment component 300 drives the execution component 100 to its limit position, the lawnmower can still move normally without jamming, avoiding the need for disassembly and maintenance of the entire mechanism due to hardware problems, thus improving the stability and reliability of the height adjustment device 010.

[0112] 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 connecting portion is provided on the outer wall of the execution component, and a shaft connector is provided on the connecting portion; An adjustment assembly, comprising an adjustment drive and a transmission component, wherein one end of the transmission component passes through the shaft connector and is threadedly connected to the shaft connector, and the other end is drively connected to the output end of the adjustment drive. The adjusting assembly is provided with at least one bearing coaxially arranged with the shaft connector, and the transmission member passes through the at least one bearing so that, when the adjusting assembly drives the actuating assembly to move to the limit position, the shaft connector abuts against the inner ring of the at least one bearing.

2. The height adjustment device according to claim 1, characterized in that, The adjustment assembly is provided with two bearings, which are a first bearing and a second bearing, respectively. The first bearing is located above the shaft connector so that, when the adjusting component drives the actuating component to move upward to its limit position, the shaft connector abuts against the inner ring of the first bearing. The second bearing is located below the shaft connector so that, when the adjusting assembly drives the actuating assembly to move downward to its limit position, the shaft connector abuts against the inner ring of the second bearing.

3. The height adjustment device according to claim 2, characterized in that, The outer wall of the transmission component is provided with external threads, the connecting part is provided with a connecting hole, and the shaft connector is provided in the connecting hole; The shaft connector 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. The first shaft and the second shaft are provided with inner holes, and the inner holes are provided with internal threads that are threadedly connected to the external threads. When the adjusting component drives the actuating component to move upward to its limit position, the first shaft end of the shaft connector abuts against the inner ring of the first bearing. When the adjusting component drives the actuating component to move downward to its limit position, the second shaft end of the shaft connector abuts against the inner ring of the second bearing.

4. The height adjustment device according to claim 1, 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 inside the adjustment housing, a first mounting port on the mounting base, and the mounting base located above the connecting portion; The at least one bearing includes a first bearing, the first mounting port is provided with the first bearing, and the top end of the transmission member passes through the first bearing and is connected to the output end of the adjustment drive member for transmission. When the adjusting component drives the actuating component to move upward to its limit position, the shaft connector abuts against the inner ring of the first bearing.

5. The height adjustment device according to claim 1, characterized in that, The adjustment assembly includes an adjustment housing, an adjustment drive component fixed to the adjustment housing, a transmission component disposed inside the adjustment housing, and a second mounting port provided on the inner bottom wall of the adjustment housing; The at least one bearing includes a second bearing, the bottom end of the transmission member is fixed to the second bearing, and the second bearing is confined within the second mounting port; When the adjusting component drives the actuating component to move downward to its limit position, the shaft connector abuts against the inner ring of the second bearing.

6. The height adjustment device according to claim 1, characterized in that, The adjustment assembly includes an adjustment housing, an adjustment drive fixed to the top of the adjustment housing, a transmission component disposed inside the adjustment housing, and an output shaft at the output end of the adjustment drive, the output shaft passing through the adjustment housing and being connected to the other end of the transmission component via a coupling.

7. The height adjustment device according to claim 1, characterized in that, The top of the execution component is provided with a magnetic element, and the top of the adjustment component is provided with a positioning element relative to the magnetic element; The positioning element includes at least a Hall sensor, which senses and detects the distance between the actuating component and the adjusting component through the magnetic element.

8. The height adjustment device according to claim 1, 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.

9. The height adjustment device according to claim 1, 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 bottom of the actuator is provided with a cutting component, which is rotatably mounted; The bottom of the actuator housing is also provided with a protective cover, the edge of which extends to the bottom so that the actuator and the cutting element are located inside the protective cover.

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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