Mowing machine cutter head lifting assembly and mowing machine
The grass trimmer's lifting mechanism with a screw rod and guide rail system addresses the inefficiencies of manual blade height adjustment, providing automatic precision and smooth operation while protecting against debris, improving user safety and equipment durability.
Patent Information
- Application Number
- CN202422323000.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-23
- Publication Date
- 2025-07-15
- Estimated Expiration
- 2034-09-23
AI Technical Summary
The height adjustment of the traditional lawn mower cutter wheel is cumbersome and has low precision, making it difficult to adapt to diverse cutting needs, and users need to contact dirt, which affects user experience and efficiency.
The screw mechanism and a multi-directional guide mechanism are adopted, combined with the drive mechanism to achieve automatic and accurate adjustment of the cutting wheel height, and the core components are protected by a fixed cover and a fixed seat to avoid the attachment of broken grass or mud.
It realizes automatic, accurate and smooth adjustment of the cutter height, reduces shaking, avoids obstacles, improves the stability and service life of the lawn mower, and improves user experience and work efficiency.
Smart Images
Figure CN223094247U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of lawn mowers, and more specifically, to a lawn mower cutter head lifting assembly and a lawn mower. Background Art
[0002] Due to many advantages such as high efficiency, convenience and flexibility, lawn mowers have been widely used in many fields such as gardening maintenance, farm management and home lawn mowing. The cutter head, as the core component, not only determines the mowing efficiency and effect, but also directly affects the user experience. In the face of complex environments such as terrain undulations and obstacle blockages, the height adjustment function of the lawn mower cutter head is particularly important.
[0003] Traditional lawn mowers mostly adopt a manual mechanical adjustment method for cutter head height adjustment, and different cutting heights are set through preset gears. This design only meets the basic needs and has significant limitations. First of all, the manual adjustment process is cumbersome. Users need to bend down and operate the handle frequently, especially when working on large or irregularly shaped lawns, resulting in high labor intensity and low work efficiency. Secondly, since the lawn height may vary due to seasons, growth rates and specific design requirements, the fixed-gear adjustment method is difficult to meet diverse cutting needs, restricting the flexibility and adaptability of the lawn mower, and the adjustment accuracy is not high, which may lead to inconsistent cutting heights and affect the overall aesthetics and healthy growth of the lawn. In addition, the traditional manual adjustment method makes users have to touch the machine body covered with dirt such as chopped grass and mud, which is inconvenient for cleaning.
[0004] Therefore, with the continuous progress of technology and the increasing diversification of user needs, it is necessary to develop a lawn mower that can automatically, accurately, smoothly and flexibly adjust the cutter head height to solve the pain points of traditional lawn mowers in height adjustment and improve the user experience and work efficiency. Summary of the Utility Model
[0005] The utility model aims to overcome at least one of the above-mentioned deficiencies of the prior art, and provides a lawn mower cutter head lifting assembly and a lawn mower, which can automatically, accurately, smoothly and flexibly adjust the cutter head height, and improve the user experience and work efficiency.
[0006] The technical solution adopted by the utility model is to provide a lawn mower blade lifting assembly, wherein the blade is driven by a first drive mechanism to achieve mowing, the lifting assembly comprising a support frame, a screw mechanism, a guide mechanism and a second drive mechanism, the support frame being used to install and fix the first drive mechanism; the screw mechanism comprising a threaded screw and a nut, the screw being arranged at a distance on one side of the support frame and being transmission-connected with the output shaft of the second drive mechanism, the axis of the screw being parallel to the output shaft of the first drive mechanism, and the nut being fixed on the outer side of the support frame; the guide mechanism comprising a slidingly fitted guide rail and a roller, the guide rail being arranged at a distance on one side of the support frame, the extension direction of the guide rail being parallel to the output shaft of the first drive mechanism, and the roller being fixed on the outer side of the support frame in a rotationally connected manner.
[0007] This solution converts the rotation of the screw into the up and down displacement of the cutter disc by driving the screw mechanism, thus achieving automatic and precise adjustment of the cutter disc height. The sliding guide rails and rollers are set up to reduce the shaking and swaying of the cutter disc when it is raised and lowered, thereby maintaining balance. On the other hand, it can avoid obstacles caused by the adhesion of broken grass or mud, so that the cutter disc can be raised and lowered more smoothly, which is conducive to the long-term stable operation of the lawn mower.
[0008] Furthermore, the lifting assembly is provided with three guide mechanisms, and the screw mechanism and the three guide mechanisms are evenly distributed around the support frame. Arranging a plurality of guide mechanisms evenly distributed around the support frame is conducive to providing multi-directional support, so that the cutter disc can be lifted and lowered smoothly.
[0009] Furthermore, the lifting assembly also includes a fixed cover and a fixed seat, the fixed cover opening faces downward, the fixed seat is fixed to the opening of the fixed cover, and the two enclose a storage space; the support frame, the screw mechanism and the guide mechanism are installed in the storage space, the support frame is fixed to the fixed seat, the output shaft of the first driving mechanism passes through the fixed seat to drive and connect the cutter disc, the two ends of the screw are respectively rotatably connected to the top of the fixed cover and the fixed seat, and the guide rail is fixedly connected to the inner wall of the fixed cover and the fixed seat. The fixed cover and the fixed seat are used to protect the driving mechanism, the support frame, the screw mechanism and the guide mechanism, effectively reducing the impact of vibration and collision on each component.
[0010] Furthermore, a bearing is installed between the screw and the top of the fixed cover and / or the fixed seat. The bearing provides support and lubrication, which is beneficial to the long-term stable operation of the lawn mower.
[0011] Further, the screw rod is a hollow screw rod, and a connecting portion is provided in its cavity; the second driving mechanism is arranged in the cavity of the screw rod, and its top is fixed on the top of the fixed cover through the top end of the screw rod, and its output shaft is in transmission connection with the connecting portion. By adopting an internal drive in the hollow screw rod, this internalized drive design can effectively avoid the bending deformation of the output shaft, is relatively safe, and is convenient for maintenance.
[0012] Further, the support frame is fixed on the fixed seat through a clamping structure, and the clamping structure includes a groove provided on the fixed seat and a convex portion provided on the support frame, and the two cooperate with each other to achieve clamping.
[0013] Another object of the present invention is to provide a lawn mower, which includes a body, a cutter head assembly and a lifting assembly. The cutter head assembly is installed on the lifting assembly, and the lifting assembly is installed on the body; the cutter head assembly includes a cutter head and a first driving mechanism, and the cutter head is in transmission connection with the output shaft of the first driving mechanism; the lifting assembly is the above-mentioned cutter head lifting assembly of the lawn mower.
[0014] Further, the body includes a chassis, and the middle part of the chassis bulges to form the fixed cover.
[0015] Further, the body further includes a top cover, and the top cover covers the chassis.
[0016] Further, the cutter head assembly further includes a cutter head cover, and the cutter head cover is installed between the cutter head and the lifting assembly and is fixedly connected to the lower side of the support frame or the fixed seat. The cutter head cover provides protection. On the one hand, it can prevent the cutter head from rising too much and damaging the fixed seat or the support frame. On the other hand, it can isolate the crushed grass or mud and prevent it from adhering to the output shaft of the first driving mechanism, thereby hindering the lifting.
[0017] Compared with the prior art, the beneficial effects of the present invention are as follows:
[0018] The cutter head lifting assembly of the lawn mower provided by the present invention uses a screw mechanism to convert rotational motion into linear displacement, combined with a multi-directional guiding mechanism, which not only reduces shaking and ensures stable lifting, but also avoids the obstruction caused by the adhesion of crushed grass or mud. At the same time, the internalized drive design enhances safety and maintenance convenience; in addition, the fixed cover and the fixed seat in the lifting assembly protect the core components and extend the service life. The overall solution not only optimizes the performance of the lawn mower, realizes the automatic, precise, smooth and flexible adjustment of the cutter head height, but also improves the stability and durability of the whole machine through an integrated design, providing a solid guarantee for efficient and smooth automatic lawn mowing operations. Description of the Drawings
[0019] Figure 1 It is the overall structure diagram of the lawn mower of the present invention.
[0020] Figure 2 This is an explosion diagram of the lawn mower of the present utility model.
[0021] Figure 3 This is a sectional view of the lawn mower of the present utility model in the area of the cutter head assembly and the lifting assembly, with an obliquely upward view.
[0022] Figure 4 This is an enlarged sectional view of the lawn mower of the present utility model in the area of the cutter head assembly and the lifting assembly, with an obliquely upward view.
[0023] Figure 5 This is a sectional view of the lawn mower of the present utility model in the area of the cutter head assembly and the lifting assembly, with an obliquely downward view.
[0024] Figure 6 This is an enlarged sectional view of the lawn mower of the present utility model in the area of the cutter head assembly and the lifting assembly, with an obliquely downward view.
[0025] Reference numeral description:
[0026] Machine body 100, chassis 110, top cover 120;
[0027] Lifting assembly 200, support frame 210, lead screw mechanism 220, lead screw 221, nut 222, bearing 223, connecting part 224,
[0028] Guiding mechanism 230, guide rail 231, roller 232, second driving mechanism 240, fixed cover 250, fixed seat 260;
[0029] Cutter head assembly 300, cutter head 310, first driving mechanism 320, cutter head cover 330. Detailed implementation manners
[0030] The attached drawings of the present utility model are only for illustrative purposes and should not be construed as a limitation to the present utility model. To better illustrate the following embodiments, some components in the attached drawings will be omitted, enlarged or reduced, which do not represent the dimensions of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the attached drawings may be omitted.
[0031] Embodiment 1
[0032] As Figures 1 to 6As shown in the figure, this embodiment provides a lawn mower, which includes a fuselage, a cutter disc assembly and a lifting assembly. The cutter disc assembly is installed on the lifting assembly, and the lifting assembly is installed on the fuselage; the cutter disc assembly includes a cutter disc and a first driving mechanism. The cutter disc is drivingly connected to the output shaft of the first driving mechanism, and the cutter disc is driven by the first driving mechanism to achieve mowing; the lifting assembly includes a support frame, a lead screw mechanism, a guiding mechanism and a second driving mechanism. The support frame is used to install and fix the first driving mechanism; the lead screw mechanism includes a screw and a nut in threaded cooperation. The screws are arranged on one side of the support frame at intervals and are drivingly connected to the output shaft of the second driving mechanism. The axis of the screw is parallel to the output shaft of the first driving mechanism, and the nut is fixed on the outer side surface of the support frame; the guiding mechanism includes a sliding rail and a roller in sliding cooperation. The sliding rails are arranged on one side of the support frame at intervals, and the extending direction of the sliding rail is parallel to the output shaft of the first driving mechanism. The roller is rotatably connected and fixed on the outer side surface of the support frame.
[0033] In this solution, by driving the lead screw mechanism, the rotation of the lead screw is converted into the up and down displacement of the cutter disc, realizing the automatic and precise adjustment of the height of the cutter disc. The sliding rail and the roller in sliding cooperation are provided. On the one hand, it reduces the sway and wobble when the cutter disc is lifted and lowered, thus maintaining balance. On the other hand, it can avoid the obstruction caused by the attachment of shredded grass or mud, making the lifting and lowering of the cutter disc smoother and conducive to the long-term stable operation of the lawn mower.
[0034] The lifting assembly is provided with three such guiding mechanisms, and the lead screw mechanism and the three guiding mechanisms are evenly distributed around the support frame. Setting multiple guiding mechanisms evenly distributed around the support frame is conducive to providing multi-directional support and enabling the cutter disc to be lifted and lowered smoothly.
[0035] The lifting assembly further includes a fixed cover and a fixed seat. The fixed cover has an opening facing downwards, and the fixed seat is fixed to the opening of the fixed cover. The two enclose to form an accommodating space; the support frame, the lead screw mechanism and the guiding mechanism are installed in the accommodating space. The support frame is fixed on the fixed seat, and the output shaft of the first driving mechanism penetrates the fixed seat to be drivingly connected to the cutter disc. The two ends of the screw are respectively rotatably connected to the top of the fixed cover and the fixed seat, and the sliding rail is fixedly connected to the inner wall of the fixed cover and the fixed seat. The driving mechanism, the support frame, the lead screw mechanism and the guiding mechanism are protected by the fixed cover and the fixed seat, effectively reducing the influence of vibration and collision on each component.
[0036] Bearings are installed between the screw and the top of the fixed cover and / or the fixed seat. The bearings provide support and lubrication, which is conducive to the long-term stable operation of the lawn mower.
[0037] The screw rod is a hollow screw rod, and a connecting part is arranged in its cavity; the second driving mechanism is arranged in the cavity of the screw rod, and its top is fixed on the top of the fixed cover through the top end of the screw rod, and its output shaft is in transmission connection with the connecting part. By adopting an internal drive with a hollow screw rod, this internalized drive design can effectively avoid bending deformation of the output shaft, is relatively safe, and is convenient for maintenance.
[0038] The support frame is fixed on the fixed seat through a clamping structure, and the clamping structure includes a groove arranged on the fixed seat and a convex part arranged on the support frame, and the two cooperate with each other to achieve clamping.
[0039] The fuselage includes a chassis, and the middle part of the chassis bulges to form the fixed cover.
[0040] The fuselage further includes a top cover, and the top cover covers the chassis.
[0041] The cutter head assembly further includes a cutter head cover, and the cutter head cover is installed between the cutter head and the lifting assembly and is fixedly connected to the lower side of the support frame or the fixed seat. The cutter head cover provides protection. On the one hand, it can prevent the cutter head from lifting too much and damaging the fixed seat or the support frame. On the other hand, it can isolate the chopped grass or mud and prevent it from adhering to the output shaft of the first driving mechanism, thereby hindering the lifting.
[0042] The cutter head lifting assembly provided in this embodiment uses a screw mechanism to convert rotational motion into linear displacement, combined with a multi-directional guiding mechanism, which not only reduces shaking and ensures stable lifting, but also avoids the obstruction caused by the adhesion of chopped grass or mud. At the same time, the internalized drive design enhances safety and maintenance convenience; in addition, the fixed cover and the fixed seat in the lifting assembly protect the core components and extend the service life. The overall solution not only optimizes the performance of the lawn mower, realizes the automatic, precise, smooth and flexible adjustment of the cutter head height, but also improves the stability and durability of the whole machine through an integrated design, providing a solid guarantee for efficient and smooth automatic lawn mowing operations.
[0043] Obviously, the above-mentioned embodiments of the present invention are only examples for clearly explaining the technical solutions of the present invention, and are not limitations on the specific implementation manners of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the claims of the present invention shall be included within the protection scope of the claims of the present invention.
Claims
1. A mower cutter head lifting assembly, wherein the cutter head is driven by a first driving mechanism to perform mowing, and is characterized in that the lifting assembly includes a support frame, a lead screw mechanism, a guiding mechanism and a second driving mechanism. The support frame is used for installing and fixing the first driving mechanism. The lead screw mechanism includes a screw rod and a nut in threaded engagement. The screw rod is arranged on one side of the support frame at a distance and is in transmission connection with the output shaft of the second driving mechanism. The axis of the screw rod is parallel to the output axis of the first driving mechanism. The nut is fixed on the outer side surface of the support frame. The guiding mechanism includes a guide rail and a roller in sliding fit. The guide rail is arranged on one side of the support frame at a distance, and the extending direction of the guide rail is parallel to the output axis of the first driving mechanism. The roller is rotatably connected and fixed on the outer side surface of the support frame.
2. The mower cutter head lifting assembly according to claim 1, wherein, Three guiding mechanisms are provided on the lifting assembly, and the lead screw mechanism and the three guiding mechanisms are evenly distributed around the support frame.
3. The mower cutter head lifting assembly according to claim 1 or 2, characterized in that the lifting assembly further includes a fixing cover and a fixing seat. The fixing cover has an opening facing downward, and the fixing seat is fixed to the opening of the fixing cover, and the two enclose to form an accommodating space. The support frame, the lead screw mechanism and the guiding mechanism are installed in the accommodating space. The support frame is fixed on the fixing seat. The output shaft of the first driving mechanism penetrates through the fixing seat to be in transmission connection with the cutter head. The two ends of the screw rod are respectively rotatably connected to the top of the fixing cover and the fixing seat. The guide rail is fixedly connected to the inner wall of the fixing cover and the fixing seat.
4. The mower cutter head lifting assembly according to claim 3, wherein, Bearings are installed between the screw rod and the top of the fixing cover and / or the fixing seat.
5. The mower cutter head lifting assembly according to claim 3, characterized in that, The screw rod is a hollow screw rod, and a connecting portion is provided in its cavity. The second driving mechanism is arranged in the cavity of the screw rod, and its top is fixed to the top of the fixing cover through the top end of the screw rod, and its output shaft is in transmission connection with the connecting portion.
6. The mower cutter head lifting assembly according to claim 3, characterized in that, The support frame is fixed on the fixing seat through a clamping structure. The clamping structure includes a groove provided on the fixing seat and a convex portion provided on the support frame, and the two cooperate with each other to achieve clamping.
7. A mower, characterized in that the mower includes a machine body, a cutter head assembly and a lifting assembly. The cutter head assembly is installed on the lifting assembly, and the lifting assembly is installed on the machine body. The cutter head assembly includes a cutter head and a first driving mechanism. The cutter head is in transmission connection with the output shaft of the first driving mechanism. The lifting assembly is the mower cutter head lifting assembly according to any one of claims 1 to 6.
8. The lawn mower according to claim 7, characterized in that, The machine body includes a chassis, and the middle part of the chassis bulges to form the fixing cover.
9. The lawn mower according to claim 7, characterized in that, The machine body further includes a top cover, and the top cover covers the chassis.
10. The lawn mower according to any one of claims 7 to 9, characterized in that, The cutter head assembly further includes a cutter head cover, and the cutter head cover is installed between the cutter head and the lifting assembly and is fixedly connected to the lower side of the support frame or the fixing seat.