Self-locking lifting adjusting mechanism and mower

Abstract

The utility model provides a self-locking lifting adjusting mechanism and a mowing machine, the self-locking lifting adjusting mechanism comprises a lifting assembly, the lifting assembly comprises a lifting rotary drum and a sleeve rotary ring, the sleeve rotary ring is sleeved on the outer side of the lifting rotary drum through threaded connection, and the outer side of the lifting rotary drum is further provided with a first limiting structure extending along the axial direction of the lifting rotary drum; the sleeve rotating ring is rotatably fixed in the fixed shell, a second limiting structure matched with the first limiting structure is arranged on the inner side of the fixed shell, the lifting rotating cylinder is arranged in the fixed shell in a lifting mode, the first limiting structure and the second limiting structure are clamped with each other, and the lifting rotating cylinder is limited to rotate in the axial direction of the lifting rotating cylinder; when the sleeve rotating ring rotates forwards or reversely, the lifting rotating drum ascends or descends in the axial direction of the lifting rotating drum. According to the lifting mechanism, the height adjusting and self-locking functions of the mower are achieved, and the problems that in the prior art, a lifting mechanism of the mower cannot achieve the self-locking function and is simple in structure at the same time are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of lawn mowers, in particular to a self-locking lifting and lowering adjustment mechanism and a lawn mower. Background Art

[0002] With the development of urbanization, the demand for lawn maintenance in public green spaces and private gardens has continued to increase, which has led to the widespread use of lawn mowers as an efficient and convenient gardening tool. At the same time, economic growth and improved living standards have led more and more families to have higher requirements for the beauty and neatness of lawns, which has also promoted the development of lawn mowers.

[0003] In the existing lawn mower technology, the height adjustment mechanism of the lawn mower is crucial to adapt to lawns of different heights. Traditional lawn mowers usually use manual adjustment or non-self-locking mechanical structures to adjust the mowing height. Manual adjustment of the mowing height is cumbersome, and the non-self-locking mechanical structure to achieve height adjustment often causes the mowing height to change due to the vibration of the lawn mower body; and some lawn mowers with self-locking functions in the prior art are often complex in design in order to adapt to the original lifting structure, which not only increases the cost but also increases the failure rate; therefore, a lawn mower is needed to solve the above problems. Utility Model Content

[0004] In view of the above-mentioned shortcomings of the prior art, the technical problem to be solved by the present invention is to provide a self-locking lifting adjustment mechanism and a lawn mower, so as to solve the problem that the lifting mechanism of the lawn mower in the prior art cannot have both a self-locking function and a simple structure.

[0005] In order to solve the above technical problems, the utility model provides a self-locking lifting and adjusting mechanism, comprising:

[0006] A lifting assembly, the lifting assembly comprising a lifting drum and a sleeve swivel, the outer side of the lifting drum and the inner side of the sleeve swivel are provided with external threads and internal threads that match each other, the sleeve swivel is sleeved on the outer side of the lifting drum through a threaded connection, and the outer side of the lifting drum is also provided with a first limiting structure extending along its axial direction;

[0007] A fixed shell, the sleeve rotating ring is rotatably fixed in the fixed shell, a second limiting structure adapted to the first limiting structure is arranged on the inner side of the fixed shell, the lifting drum is lifted and lowered in the fixed shell, and the first limiting structure and the second limiting structure are engaged with each other to limit the lifting drum to rotate along its axial direction, and when the sleeve rotating ring rotates forward or reversely, the lifting drum rises or falls along its axial direction;

[0008] A lifting drive assembly is arranged in a fixed shell, and includes a lifting drive member and a worm gear structure. The worm gear structure is directly or indirectly connected to the lifting drive member and the sleeve swivel. The lifting drive member drives the sleeve swivel to rotate through the worm gear structure.

[0009] As a more preferred embodiment, the fixed shell includes an upper shell and a lower shell, the sleeve swivel is positioned between the upper shell and the lower shell, and the lower shell or the upper shell is provided with a limiting portion for limiting the rotation of the sleeve swivel.

[0010] As a more preferred embodiment, the first limiting structure is a limiting groove, and the second limiting structure is a limiting protrusion matched with the limiting groove. When the lifting drum rises or falls along its axial direction, the limiting protrusion slides in the limiting groove.

[0011] As a more preferred embodiment, the external thread arranged on the outside of the lifting cylinder is a multi-start thread, and the first limiting structure arranged on the outside of the lifting cylinder includes multiple threads, and the number of threads of the multi-start thread is consistent with the number of first limiting structures, and the starting point or end point of each thread is connected to each first limiting structure one by one, and the starting points of multiple threads are connected to the first limiting structure at the same time, or the end points of multiple threads are connected to the first limiting structure at the same time.

[0012] As a more preferred manner, the worm gear structure that cooperates with the worm in the worm gear structure is directly formed on the outside of the sleeve rotating ring, and the lifting drive member directly drives the sleeve rotating ring to rotate through the worm. This structure is simple and compact, and can further reduce the product size.

[0013] As a more preferred embodiment, the self-locking lifting and adjusting mechanism also includes a driven rotating wheel, the worm wheel of the worm gear structure is coaxially arranged with the driven rotating wheel, and the worm gear structure is indirectly connected to the sleeve rotating ring through the driven rotating wheel. This structure has low requirements on the manufacturing process and is conducive to production and manufacturing.

[0014] As a more preferred embodiment, the fixed shell includes a driving chamber for accommodating the lifting driving assembly and a lifting chamber for accommodating the lifting assembly. The driving chamber and the lifting chamber are independent of each other and interconnected, so that the lifting driving assembly and the lifting assembly are connected to each other and work independently.

[0015] In order to better solve the above problems, the utility model also provides a lawn mower, comprising:

[0016] The above-mentioned self-locking lifting and adjusting mechanism;

[0017] A blade and a blade driving member, wherein the blade driving member is arranged in the lifting drum, and an output shaft of the blade driving member extends out from the lifting drum and is connected to the blade.

[0018] As a more preferred embodiment, the lawn mower further includes a support frame and a roller assembly arranged on the support frame, the self-locking lifting and lowering adjustment mechanism is arranged on the support frame, and the output shaft of the blade drive member passes through the support frame and is connected to a blade arranged at the bottom of the support frame, and the lawn mower moves on the grass through the roller assembly and trims the grass through the blade at its bottom.

[0019] As a more preferred embodiment, the lawn mower also includes a control component and a sensor component arranged on the self-locking lifting and adjusting mechanism. The sensor component is electrically connected to the control component to detect the current position of the lifting drum and assist the control component in controlling the blade drive and the lifting drive to avoid damage to the lawn mower or even danger caused by untimely control.

[0020] As a more preferred embodiment, the sensor assembly includes a Hall element electrically connected to the control assembly and a corresponding magnetic part. The magnetic part is arranged on the outside of the lifting sleeve, and the Hall element is arranged on the fixed shell at a position corresponding to the magnetic part. When the Hall element approaches or moves away from the magnetic part, the Hall element sends a corresponding electrical signal to the control assembly, and the control assembly obtains the current position of the lifting drum according to the electrical signal.

[0021] As described above, the self-locking lifting and adjusting mechanism and the lawn mower of the utility model have the following beneficial effects: when the self-locking lifting and adjusting mechanism of the utility model is working, the lifting driving member drives the sleeve rotating ring to rotate through the worm gear structure, and the lifting drum cannot rotate with the sleeve rotating ring under the limiting action of the first limiting structure and the second limiting structure, and the sleeve rotating ring moves on the external thread of the lifting drum by using its internal thread. At the same time, since the sleeve rotating ring is fixed in the fixed shell and cannot move in the axial direction of the lifting drum, the lifting drum moves along its axial direction relatively; more specifically, when the lifting driving member controls When the sleeve rotating ring rotates in the direction of rotation, the lifting drum can be raised or lowered along its axial direction; at the same time, due to the self-locking function of the worm gear structure, when the lifting drum is subjected to external force or vibration, the lifting drum cannot overcome the self-locking force of the worm gear structure to move, ensuring that the lifting drum can only be driven to move by the driving force of the lifting drive member, thereby improving the stability of the structure; further, the self-locking lifting adjustment mechanism of the utility model realizes the functions of height adjustment and self-locking through the limited structures of the lifting drum, the sleeve rotating ring and the worm gear structure, and has a simple structure, reducing costs and failure rates;

[0022] The lawn mower of the utility model adopts the above-mentioned self-locking lifting and adjusting mechanism. When the lawn mower is working, the lifting driving member controls the rotation direction of the sleeve rotating ring, so as to control the lifting rotating drum to rise or fall along its axial direction, thereby realizing the adjustment of the blade height and achieving the effect of adjusting the lawn height; at the same time, the self-locking characteristic of the worm gear structure of the self-locking lifting and adjusting mechanism also ensures that the blade of the lawn mower will not move due to factors such as vibration or external force during the mowing process, thereby ensuring the consistency of the lawn height and improving the user's experience; at the same time, since the self-locking lifting and adjusting mechanism adopts a relatively simple mechanical structure, it saves costs and ensures stable operation even in the harsh working environment of the lawn mower;

[0023] In summary, the self-locking lifting and adjusting mechanism and the lawn mower of the utility model realize the height adjustment and self-locking function of the lawn mower through limited structures such as the lifting drum, the sleeve swivel and the worm gear structure, thereby solving the problem that the lifting mechanism of the lawn mower in the prior art cannot take into account both the self-locking function and the simple structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 Shown is an exploded schematic diagram of the self-locking lifting and adjusting mechanism and the lawn mower of the utility model;

[0025] Figure 2 Shown is a structural schematic diagram of the self-locking lifting and adjusting mechanism and the lawn mower of the utility model;

[0026] Figure 3 Shown is a schematic diagram of a self-locking lifting and adjusting mechanism and a lawn mower according to the present invention from a top view;

[0027] Figure 4 Display as Figure 3 Cross-sectional view along the AA direction.

[0028] Component number description

[0029] 1 Self-locking lifting and adjusting mechanism

[0030] 11 Lifting components

[0031] 111 Lifting drum

[0032] 111a The first limiting structure

[0033] 112 sleeve swivel

[0034] 12 Fixing the housing

[0035] 121 Limiting part

[0036] 13 Lifting drive assembly

[0037] 131 Lifting drive parts

[0038] 132 Worm gear structure

[0039] 133 driven wheel

[0040] 14 Sensor components

[0041] 141 Hall element

[0042] 142 Magnetic Parts

[0043] 2 Blade drive

[0044] 3 blade turntable

[0045] 4 Blades

[0046] 5 Mowing Fender

[0047] 6 Protective cover

[0048] 7 Blade control cable DETAILED DESCRIPTION

[0049] The following is a description of the implementation of the present invention by means of specific embodiments. People familiar with the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0050] It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions that can be implemented in this utility model, so they have no technical substantive significance. Any modification of the structure, change of the proportional relationship or adjustment of the size, without affecting the effects that can be produced by the utility model and the purposes that can be achieved, should still fall within the scope of the technical content disclosed by the utility model. The following detailed description should not be considered restrictive, and the scope of the embodiments of this application is limited only by the claims of the published patents. The terms used here are only for describing specific embodiments and are not intended to limit this application. Spatial related terms, such as "upper", "lower", "left", "right", "below", "below", "lower", "above", "upper", etc., can be used in the text to facilitate the description of the relationship between an element or feature shown in the figure and another element or feature.

[0051] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix", "hold" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0052] Furthermore, as used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless there is an indication to the contrary in the context. It should be further understood that the terms "comprise", "include" indicate the presence of the described features, operations, elements, components, items, kinds, and / or groups, but do not exclude the presence, occurrence or addition of one or more other features, operations, elements, components, items, kinds, and / or groups. The terms "or" and "and / or" used herein are interpreted as inclusive, or mean any one or any combination. Therefore, "A, B or C" or "A, B and / or C" means "any of the following: A; B; C; A and B; A and C; B and C; A, B and C". Exceptions to this definition will only occur when the combination of elements, functions or operations is inherently mutually exclusive in some way.

[0053] like Figures 1 to 4 As shown, the utility model provides a self-locking lifting and adjusting mechanism 1, comprising:

[0054] The lifting assembly 11 includes a lifting drum 111 and a sleeve swivel 112. The outer side of the lifting drum 111 and the inner side of the sleeve swivel 112 are provided with external threads and internal threads that match each other. The sleeve swivel 112 is sleeved on the outer side of the lifting drum 111 through a threaded connection. The outer side of the lifting drum 111 is also provided with a first limiting structure 111a extending along its axial direction.

[0055] A fixed housing 12, wherein the sleeve swivel 112 is rotatably fixed in the fixed housing 12, and a second limiting structure adapted to the first limiting structure 111a is provided on the inner side of the fixed housing 12. The lifting drum 111 is liftably provided in the fixed housing 12, and the first limiting structure 111a and the second limiting structure are engaged with each other to limit the lifting drum 111 to rotate along its axial direction. When the sleeve swivel 112 rotates forward or reversely, the lifting drum 111 rises or falls along its axial direction.

[0056] The lifting drive assembly 13 is arranged in the fixed shell 12, and includes a lifting drive member 131 and a worm gear structure 132. The worm gear structure 132 is directly or indirectly connected to the lifting drive member 131 and the sleeve swivel 112 respectively. The lifting drive member 131 drives the sleeve swivel 112 to rotate through the worm gear structure 132.

[0057] In order to better introduce the self-locking lifting and adjusting mechanism 1 of the utility model, it is now explained in combination with the following specific applications: when the self-locking lifting and adjusting mechanism 1 of the utility model is working, the lifting drive member 131 drives the sleeve swivel 112 to rotate through the worm gear structure 132, and the lifting drum 111 cannot rotate with the sleeve swivel 112 under the limiting action of the first limiting structure 111a and the second limiting structure. The sleeve swivel 112 uses its internal thread to move on the external thread of the lifting drum 111. At the same time, since the sleeve swivel 112 is fixed in the fixed shell 12 and cannot move in the axial direction of the lifting drum 111, the lifting drum 111 moves along its axial direction. More specifically, when the lifting drive member 1 31 controls the rotation direction of the sleeve rotating ring 112, so that the lifting drum 111 can be raised or lowered along its axial direction; at the same time, due to the self-locking function of the worm gear structure 132, when the lifting drum 111 is subjected to external force or vibration, the lifting drum 111 cannot overcome the self-locking force of the worm gear structure 132 and move, thereby ensuring that the lifting drum 111 can only be driven to move by the driving force of the lifting drive member 131, thereby improving the stability of the structure; further, the self-locking lifting adjustment mechanism 1 of the utility model realizes the functions of height adjustment and self-locking through the limited structures of the lifting drum 111, the sleeve rotating ring 112 and the worm gear structure 132, has a simple structure, and reduces costs and failure rates.

[0058] In this embodiment, the fixed shell 12 includes an upper shell and a lower shell, the sleeve swivel 112 is positioned between the upper shell and the lower shell, and the lower shell or the upper shell is provided with a limiting portion 121 for limiting the rotation of the sleeve swivel 112 .

[0059] In this embodiment, the lifting drive component 131 adopts a drive motor. Due to the advantages of the drive motor being easy to control, quick to respond and easy to integrate, the drive motor is adopted as the lifting drive component 131. The rise or fall of the lifting drum 111 can be controlled more flexibly and conveniently. At the same time, it is also easier for the lifting drive component 131 to be integrated into the fixed shell 12.

[0060] In this embodiment, if Figure 1As shown, the first limiting structure 111a is a limiting groove, and the second limiting structure is a limiting protrusion matched with the limiting groove. When the lifting drum 111 rises or falls along its axial direction, the limiting protrusion slides in the limiting groove; similarly, other types of limiting structures can also be used to limit the lifting drum 111.

[0061] In this embodiment, if Figure 1 As shown, the external thread arranged on the outer side of the lifting drum 111 is a multi-start thread, and the first limiting structure 111a arranged on the outer side of the lifting drum 111 includes multiple threads, and the number of threads of the multi-start thread is consistent with the number of the first limiting structures 111a, and the starting point or the end point of each thread is connected to each first limiting structure 111a in a one-to-one correspondence, and the starting points of the multiple multi-start threads are connected to the first limiting structure 111a at the same time, or the end points are connected to the first limiting structure 111a at the same time, wherein the connection refers to the starting point and the end point of the multi-start thread extending to the first limiting structure 111a. Stop to avoid interfering with the normal limiting function of the first limiting structure 111a. When the sleeve swivel 112 rotates on the external thread, the position where the internal thread on it is screwed out from the first limiting structure 111a and enters the multi-thread is the starting point of the multi-thread, and the position where the multi-thread is screwed out and enters the limiting groove is the end point of the multi-thread. The starting point and end point of the multi-thread are connected to the first limiting structure 111a to meet the requirement that when the sleeve swivel 112 rotates on the external thread, it can rotate more smoothly between the various multi-threads. In this embodiment, Figure 1 As shown, the fixed shell 12 includes a driving chamber for accommodating the lifting driving component 13 and a lifting chamber for accommodating the lifting component 11. The driving chamber and the lifting chamber are independent of each other and interconnected. The independently arranged chambers can meet the assembly positioning and later maintenance of each component, and can meet the requirements of each component to complete work independently, thereby improving safety and stability.

[0062] Furthermore, in this embodiment, if Figure 1As shown, the self-locking lifting and adjusting mechanism 1 also includes a driven wheel 133, and the outer side of the driven wheel 133 and the outer side of the sleeve rotating ring 112 are provided with mutually meshing gear structures, the worm gear structure 132 includes a worm and a worm wheel, and the driven wheel 133 is coaxially fixed with the worm wheel of the worm gear structure 132, and the rotation of the worm wheel drives the driven wheel 133 to rotate, and the worm gear structure 132 is indirectly connected to the sleeve rotating ring 112 through the driven rotating wheel 133, and the worm gear structure 132 drives the sleeve rotating ring 112 through the driven wheel 133. The advantage of this indirect driving scheme is that it does not require high manufacturing technology, which is conducive to production and manufacturing; as another In the implementation mode, the worm gear structure 132 can also be directly connected to the sleeve rotating ring 112, and the worm wheel structure that cooperates with the worm in the worm gear structure 132 is directly formed on the outside of the sleeve rotating ring 112, and the lifting drive member 131 directly drives the sleeve rotating ring 112 to rotate through the worm. Under this scheme, the worm wheel in the worm gear structure 132 does not exist independently, but the worm wheel structure that cooperates with the worm is directly integrally formed on the outside of the sleeve rotating ring 112. When the worm rotates, it drives the worm wheel structure to rotate, and also drives the sleeve rotating ring 112 to rotate. The advantage of this direct drive scheme is that the structure is more simple and compact, and the product size can be further reduced.

[0063] In the present embodiment, the gear ratios among the output shaft of the lifting drive 131, the worm gear, the worm, the driven wheel 133, the sleeve ring 112 and the lifting drum 111 are all set at a preset ratio to achieve the purpose of accurately controlling the rising or falling height of the lifting drum 111 by controlling the number of revolutions of the output shaft of the lifting drive 131.

[0064] In order to better solve the above problems, the utility model also provides a lawn mower, comprising:

[0065] The above-mentioned self-locking lifting and adjusting mechanism 1;

[0066] The blade 4 and the blade driving member 2 are arranged in the lifting drum 111 , and the output shaft of the blade driving member 2 extends out from the lifting drum 111 and is connected to the blade 4 .

[0067] In order to better introduce the lawn mower of the utility model, it is now explained in combination with the following specific applications: the lawn mower of the utility model adopts the above-mentioned self-locking lifting and adjusting mechanism 1. When the lawn mower is working, the lifting driving member 131 controls the rotation direction of the sleeve rotating ring 112, so as to control the lifting rotating cylinder 111 to rise or fall along its axial direction, thereby realizing the adjustment of the height of the blade 4, and achieving the effect of adjusting the lawn cutting height; at the same time, the self-locking characteristic of the worm gear structure 132 of the self-locking lifting and adjusting mechanism 1 also ensures that the blade 4 of the lawn mower will not move due to factors such as vibration or external force during the mowing process, thereby ensuring the consistency of the lawn cutting height and improving the user's experience; at the same time, because the self-locking lifting and adjusting mechanism 1 adopts a relatively simple mechanical structure, it saves costs and ensures stable operation even in the harsh working environment of the lawn mower;

[0068] It can be seen that the self-locking lifting adjustment mechanism and the lawn mower of the utility model realize the height adjustment and self-locking function of the lawn mower through limited structures such as the lifting drum 111, the sleeve swivel 112 and the worm gear structure 132, thereby solving the problem that the lifting mechanism of the lawn mower in the prior art cannot take into account both the self-locking function and the simple structure.

[0069] In the present embodiment, the lawn mower further comprises a control assembly, which extends into the fixed housing 12 through a cable assembly and is electrically connected to the blade drive 2 and the lifting drive 131, thereby realizing control over the start and stop, rotation direction and rotation speed of the lifting drive 131 and the blade drive 2; more specifically, in the present embodiment, the cable assembly comprises a blade control cable 7 for connecting to the blade drive 2; further, in the present embodiment, the lawn mower further comprises a power supply assembly, which is also electrically connected to the control assembly, the blade drive 2 and the lifting drive 131 through a cable assembly, providing power support for the control assembly, the blade drive 2 and the lifting drive 131, and the power supply assembly may comprise a battery to provide the lawn mower with a more flexible usage scenario, and the power supply assembly may also be connected to an external power supply through a cable assembly to obtain better power and battery life.

[0070] In this embodiment, if Figure 4 As shown, the blade drive component 2 also adopts a drive motor. Due to the advantages of easy control, fast response and easy integration of the drive motor, the drive motor is used as the blade drive component 2. Through the control system, the start and stop of the blade 4 and the rotation speed and other parameters can be controlled more flexibly and conveniently. At the same time, its smaller size also makes it easier to be directly set in the lifting drum 111. Of course, in order to obtain better endurance and power, the blade drive component 2 can also use other mechanisms as the power source.

[0071] In this embodiment, if Figure 1 as well as Figure 4 As shown, the lawn mower also includes a blade turntable 3, and the blade 4 is arranged at the edge of the blade turntable 3. The output shaft of the blade driving member 2 extends from the lifting drum 111 and is connected to the blade turntable 3, and drives the blade turntable 3 to rotate. The blade 4 arranged at the edge of the blade turntable 3 can obtain a higher rotation speed, thereby achieving faster lawn mowing and improving work efficiency; further, in this embodiment, the lawn mower includes a plurality of blades 4, and the outer contour of the blade turntable 3 is a disc, and the plurality of blades 4 are respectively arranged on the edge of the blade turntable 3 in a centrally symmetrical manner. Specifically, the number of blades 4 is preferably three.

[0072] In the present embodiment, the lawn mower further comprises a support frame and a roller assembly arranged on the support frame, the self-locking lifting and adjusting mechanism 1 is arranged on the support frame, and the output shaft of the blade driving member 2 passes through the support frame and is connected to the blade 4 arranged at the bottom of the support frame, and the lawn mower moves on the grass through the roller assembly and trims the grass through the blade 4 at its bottom; further, in the present embodiment, the roller assembly comprises a plurality of rollers, and the plurality of rollers are arranged on the support frame, specifically, the number of the rollers is preferably three or four; further, the roller assembly is generally composed of a driving wheel and a universal wheel.

[0073] In this embodiment, if Figure 1 , Figure 2 , Figure 3 as well as Figure 4 As shown, the lawn mower further includes a mowing baffle 5, which is arranged at the periphery of the rotation radius of the blade 4 to improve the safety of the lawn mower, to prevent the blade 4 from being damaged by colliding with hard objects, and to prevent the human body from directly contacting the blade 4 to cause safety accidents.

[0074] Furthermore, in this embodiment, if Figure 1 , Figure 2 , Figure 3 as well as Figure 4 As shown, the lawn mower also includes a protective cover 6, which is arranged between the fixed shell 12 and the mowing baffle 5 to prevent dust and water vapor from entering the interior of the lawn mower and affecting the normal operation and service life of the lawn mower; further, the protective cover 6 is an elastic sleeve structure with multiple layers of folds, and the two ends of the elastic sleeve are respectively connected to the fixed shell 12 and the mowing baffle 5, and the mowing baffle 5 is provided with a through hole, and the channel in the elastic sleeve and the through hole of the mowing baffle 5 are used to meet the extension of the output shaft of the blade drive 2.

[0075] In this embodiment, if Figure 1As shown, the lawn mower also includes a sensor component 14 arranged on the self-locking lifting adjustment mechanism 1, and the sensor component 14 is electrically connected to the control component to detect the current position of the lifting drum 111, and assist the control component in controlling the blade drive 2 and the lifting drive 131 to avoid damage to the lawn mower or even danger caused by untimely control.

[0076] In this embodiment, if Figure 1 As shown, the sensor assembly 14 includes a Hall element 141 and a corresponding magnetic piece 142 electrically connected to the control assembly, the magnetic piece 142 is arranged on the outside of the lifting sleeve, and the Hall element 141 is arranged on the fixed shell 12 at a position corresponding to the magnetic piece 142. When the Hall element 141 approaches or moves away from the magnetic piece 142, the Hall element 141 sends a corresponding electrical signal to the control assembly, and the control assembly obtains the current position of the lifting drum 111 according to the electrical signal, wherein the magnetic piece 142 can be a magnet; further, in this embodiment, the magnetic piece 142 is arranged at the extreme position of the lifting drum 111 rising or falling, and when the control assembly obtains the Hall element When the electrical signal transmitted by 141 is received, the lifting drive 131 can be quickly closed to avoid damage; at the same time, the lifting drum 111 in this position can be used as the starting position for its height adjustment, and on this basis, the number of revolutions of the output shaft of the lifting drive 131 can be controlled to accurately control the rising or falling height of the lifting drum 111, thereby achieving the purpose of resetting; further, in this embodiment, the Hall element 141 can also be arranged on the outside of the lifting sleeve, and the corresponding magnetic member 142 can be arranged on the fixed shell 12; further, the sensor assembly 14 can also be realized by setting a micro switch and a corresponding trigger structure, and its implementation idea and method are consistent with the above content, and the details will not be repeated.

[0077] In summary, the self-locking lifting and adjusting mechanism 1 and the lawn mower of the present invention have the following advantages:

[0078] 1. Simple structure and low cost: The height adjustment and self-locking functions are realized through the limited structure of the lifting drum 111, the sleeve swivel 112 and the worm gear structure 132, which simplifies the mechanical structure and reduces the cost and failure rate.

[0079] 2. High stability: The self-locking function of the worm gear structure 132 ensures that the lifting drum 111 will not move when subjected to external force or vibration, thereby improving the stability of the entire mechanism.

[0080] 3. Flexible operation: A driving motor is used as the lifting driving member 131, which is easy to control, quick to respond, and easy to integrate, making the rising or falling control of the lifting drum 111 more flexible and convenient.

[0081] 4. Precise control: Through the preset gear ratio and the sensor assembly 14, the rising or falling height of the lifting drum 111 can be precisely controlled to meet the needs of different height adjustments.

[0082] 5. Improved safety: The lawn mower includes a mowing baffle 5 and a protective cover 6, which improves safety during use and prevents the blade 4 from hitting a hard object to cause damage or human body from contacting the blade 4 to cause a safety accident.

[0083] 6. Strong adaptability: The lawn mower is designed with a roller assembly for easy movement on the grass, and the power supply assembly can be a battery or an external power supply, providing flexible usage scenarios.

[0084] 7. Maintenance structure: The design of the protective cover 6 prevents dust and water vapor from entering the interior of the lawn mower, which helps to maintain the normal operation of the machine and extend its service life.

[0085] 8. Efficient work: The lawn mower includes a blade turntable 3 and a plurality of blades 4, which can achieve fast lawn mowing and improve work efficiency.

[0086] 9. Intelligent control: The sensor assembly 14 is connected to the control assembly to detect the position of the lifting drum 111, and assist in controlling the blade drive 2 and the lifting drive 131 to avoid damage or danger caused by untimely control.

[0087] 10. Easy to adjust: Through the control assembly, the user can conveniently control the start and stop, rotation direction and rotation speed of the lifting drive member 131 and the blade drive member 2 to meet different mowing requirements.

[0088] Therefore, the utility model effectively overcomes various shortcomings in the prior art and has high industrial utilization value.

[0089] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the technology may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed in the present invention shall still be covered by the claims of the present invention.

Claims

1. A self-locking lifting and adjusting mechanism (1), characterized in that: include: A lifting assembly (11), the lifting assembly (11) comprising a lifting drum (111) and a sleeve rotating ring (112), the outer side of the lifting drum (111) and the inner side of the sleeve rotating ring (112) being provided with external threads and internal threads that match each other, the sleeve rotating ring (112) being sleeved on the outer side of the lifting drum (111) through a threaded connection, and the outer side of the lifting drum (111) being further provided with a first limiting structure (111a) extending along its axial direction; A fixed shell (12), the sleeve rotating ring (112) is rotatably fixed in the fixed shell (12), a second limiting structure matched with the first limiting structure (111a) is arranged on the inner side of the fixed shell (12), the lifting drum (111) is liftably arranged in the fixed shell (12), and the first limiting structure (111a) and the second limiting structure are mutually engaged to limit the lifting drum (111) to rotate along its axial direction, and when the sleeve rotating ring (112) rotates forward or reversely, the lifting drum (111) rises or falls along its axial direction; A lifting drive assembly (13), the drive assembly being arranged in a fixed housing (12), comprising a lifting drive member (131) and a worm gear structure (132), the worm gear structure (132) being directly or indirectly connected to the lifting drive member (131) and the sleeve rotating ring (112), respectively, the lifting drive member (131) driving the sleeve rotating ring (112) to rotate via the worm gear structure (132).

2. The self-locking lifting and adjusting mechanism (1) according to claim 1, characterized in that: The fixed shell (12) comprises an upper shell and a lower shell, the sleeve swivel (112) is positioned between the upper shell and the lower shell, and the lower shell or the upper shell is provided with a limiting portion (121) for limiting the rotation of the sleeve swivel (112).

3. The self-locking lifting and adjusting mechanism (1) according to claim 1, characterized in that: The first limiting structure (111a) is a limiting groove, and the second limiting structure is a limiting protrusion matched with the limiting groove. When the lifting drum (111) rises or falls along its axial direction, the limiting protrusion slides in the limiting groove.

4. The self-locking lifting and adjusting mechanism (1) according to claim 1, characterized in that: The external thread arranged on the outer side of the lifting drum (111) is a multi-start thread, and the first limiting structures (111a) arranged on the outer side of the lifting drum (111) include a plurality of threads, and the number of threads of the multi-start thread is consistent with the number of the first limiting structures (111a), and the starting point or the end point of each thread is connected to each first limiting structure (111a) in a one-to-one correspondence, and the starting points of the plurality of multi-start threads are simultaneously connected to the first limiting structure (111a), or the end points of the plurality of multi-start threads are simultaneously connected to the first limiting structure (111a).

5. The self-locking lifting and adjusting mechanism (1) according to claim 1, characterized in that: The worm gear structure that cooperates with the worm in the worm gear structure (132) is directly formed on the outside of the sleeve rotating ring (112), and the lifting drive member (131) directly drives the sleeve rotating ring (112) to rotate through the worm.

6. The self-locking lifting and adjusting mechanism (1) according to claim 1, characterized in that: The self-locking lifting and adjusting mechanism (1) also includes a driven rotating wheel (133), the worm wheel of the worm gear structure (132) and the driven rotating wheel (133) are coaxially arranged, and the worm gear structure (132) is indirectly connected to the sleeve rotating ring (112) via the driven rotating wheel (133).

7. The self-locking lifting and adjusting mechanism (1) according to claim 6, characterized in that: The fixed shell (12) comprises a driving chamber for accommodating the lifting drive component (13) and a lifting chamber for accommodating the lifting component (11); the driving chamber and the lifting chamber are independent of each other and are interconnected, so that the lifting drive component (13) and the lifting component (11) are connected to each other and work independently.

8. A lawn mower, characterized in that: include: The self-locking lifting and adjusting mechanism (1) according to any one of claims 1 to 7; A blade (4) and a blade driving component (2), wherein the blade driving component (2) is arranged in the lifting drum (111), and an output shaft of the blade driving component (2) extends out from the lifting drum (111) and is connected to the blade (4).

9. The lawn mower according to claim 8, characterized in that: The lawn mower further comprises a support frame and a roller assembly arranged on the support frame, the self-locking lifting and adjusting mechanism (1) is arranged on the support frame, and the output shaft of the blade driving member (2) passes through the support frame and is connected to a blade (4) arranged at the bottom of the support frame. The lawn mower moves on the grass through the roller assembly and simultaneously mows the grass through the blade (4) at its bottom.

10. The lawn mower according to claim 8, characterized in that: The lawn mower further comprises a control component and a sensor component (14) arranged on the self-locking lifting adjustment mechanism (1); the sensor component (14) is electrically connected to the control component and is used to detect the current position of the lifting drum (111) and assist the control component in controlling the blade drive component (2) and the lifting drive component (131); the sensor component (14) comprises a Hall element (141) electrically connected to the control component and a corresponding magnetic element (142); the magnetic element (142) is arranged on the outer side of the lifting sleeve; and the Hall element (141) is arranged on the fixed housing (12) at a position corresponding to the magnetic element (142).

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