Mower with adjustable mowing height

Abstract

The utility model relates to a mowing machine, in particular to a mowing height adjustable mowing machine which comprises a frame and a cutter head arranged on the frame. A plurality of groups of blades are mounted on the cutter head, a trimming mechanism is arranged on the frame, and the trimming mechanism can drive the cutter head to rotate to drive the plurality of groups of blades to rotate so as to cut grass higher than the blades; a height adjusting mechanism is arranged on the frame, and the height adjusting mechanism can drive the cutter head to be close to or far away from the frame, so that the distance between the blade and the ground is changed; a control mechanism is further arranged on the frame, the control mechanism can drive the height adjusting mechanism to act when the trimming mechanism acts so as to adapt to different operation requirements, the control mechanism is used for controlling the height adjusting mechanism to act, the situation that a lawn is uneven after being trimmed is avoided, the height can be adjusted in time during trimming work, and the trimming efficiency is improved. The working efficiency is improved, and safety accidents are avoided.

Description

Technical Field

[0001] The utility model relates to a lawn mower, in particular to a lawn mower with adjustable mowing height. Background Technique

[0002] The purpose of lawn mowing is not only for aesthetics. More importantly, through pruning, tillering of gramineous plants can be promoted, the density, flatness and elasticity of the lawn can be increased, the abrasion resistance of the lawn can be enhanced, and the service life of the lawn can be extended. Timely pruning can also inhibit the flowering and seed setting of lawn weeds, so that the weeds lose the opportunity to reproduce and gradually disappear.

[0003] Commonly used lawn mowing tools include inclined hanging lawn mowers, backpack lawn mowers, push lawn mowers and self-propelled lawn mowers. If the surface is uneven, soft or has density changes, the color change of the lawn may be striped. This is due to the fact that the effective mowing height is too low for the existing lawn conditions. To solve the problem, it is necessary to enable or change cultivation practices, change the hob group configuration or increase the mowing height of the workbench. The lower the mowing height, the stronger the predictability and the smoother the lawn surface!

[0004] The commonly used method for adjusting the mowing height of a push lawn mower is to replace wheels of different sizes, so as to change the distance between the trimming mechanism and the ground. However, replacing wheels is time-consuming and laborious, reducing work efficiency. The commonly used methods for adjusting the mowing height of inclined hanging lawn mowers and backpack lawn mowers are to manually increase the distance between the trimming machine and the ground. Since the lawn mower is relatively heavy, it is difficult for the operator to keep the height constant, and the lawn often appears uneven, reducing the aesthetics. Summary of the Invention

[0005] The purpose of the utility model is to provide a lawn mower with adjustable mowing height to solve the problems put forward in the above background technique.

[0006] To achieve the above purpose, the utility model provides the following technical solutions:

[0007] A lawn mower with adjustable mowing height includes a frame and a cutter head arranged on the frame; a plurality of groups of blades are installed on the cutter head;

[0008] A trimming mechanism is arranged on the frame, and the trimming mechanism can drive the cutter head to rotate, so as to drive the plurality of groups of blades to rotate to cut the grass higher than the blades;

[0009] A height adjusting mechanism is arranged on the frame, and the height adjusting mechanism can drive the cutter head to approach or move away from the frame, so as to change the distance between the blades and the ground;

[0010] A control mechanism is further provided on the frame. The control mechanism can drive the height adjustment mechanism to act when the trimming mechanism acts, so as to adapt to different operation requirements.

[0011] The lawn mower with adjustable mowing height as described above: The trimming mechanism includes a motor installed on the frame. A telescopic sleeve rotatably connected to the frame is connected to the output end of the motor. A fitting groove is formed in the telescopic sleeve. A telescopic column is slidably fitted in the telescopic sleeve. A protrusion fitted with the fitting groove is installed on the telescopic column. The cutter head is connected to the telescopic column.

[0012] The lawn mower with adjustable mowing height as described above: The height adjustment mechanism includes a first rotating shaft rotatably installed on the frame. A threaded protrusion is installed on the first rotating shaft. An internally threaded sleeve is threadedly connected to the threaded protrusion. A lifting sleeve connected to the internally threaded sleeve is rotatably fitted on the telescopic column. A guide rod is installed on the frame. A sliding sleeve is slidably fitted on the guide rod.

[0013] The lawn mower with adjustable mowing height as described above: The control mechanism includes a first pulley installed on the telescopic sleeve. An arc-shaped groove is formed in the frame. A second rotating shaft is slidably fitted in the arc-shaped groove. A third pulley is rotatably fitted on the second rotating shaft. The first pulley and the third pulley are connected by a belt. A second pulley is installed on the first rotating shaft, and the second pulley is located between the first pulley and the third pulley.

[0014] The lawn mower with adjustable mowing height as described above: The control mechanism further includes a tension spring installed on the second rotating shaft. The other end of the tension spring is installed on the frame. A first connecting rod is rotatably installed at the end of the second rotating shaft away from the tension spring. The other end of the first connecting rod is rotatably installed with a coupling shaft. A sliding groove is formed in the frame. A fitting block is slidably fitted in the sliding groove. A second connecting rod connected to the coupling shaft is installed on the fitting block.

[0015] The lawn mower with adjustable mowing height as described above: The blade is arc-shaped, and the thickness of its outer arc surface and inner arc surface is relatively thin.

[0016] The lawn mower with adjustable mowing height as described above: An armrest frame is installed on the frame. A handle is installed on the armrest frame.

[0017] The lawn mower with adjustable mowing height as described above:.

[0018] Compared with the prior art, the beneficial effects of the utility model are as follows: By using the control mechanism to control the operation of the height adjustment mechanism, the stability of the height during the operation of the trimming mechanism can be ensured (that is, the unevenness of the trimmed lawn is avoided), and the height can be adjusted in a timely manner during the trimming operation, improving the work efficiency and avoiding the occurrence of safety accidents. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic structural diagram of a lawn mower with adjustable mowing height.

[0020] Figure 2 It is a schematic structural diagram of another perspective of a lawn mower with adjustable mowing height.

[0021] Figure 3 It is a schematic structural diagram of the telescopic sleeve and the telescopic column in a lawn mower with adjustable mowing height.

[0022] Figure 4 It is a schematic structural diagram of the trimming mechanism in a lawn mower with adjustable mowing height.

[0023] Figure 5 It is a schematic structural diagram of the height adjustment structure in a lawn mower with adjustable mowing height.

[0024] Figure 6 It is a schematic structural diagram of the control mechanism in a lawn mower with adjustable mowing height.

[0025] Figure 7 It is a schematic structural diagram of the frame in a lawn mower with adjustable mowing height.

[0026] In the figure: 1. Frame; 101. Arc groove; 102. Slide groove;

[0027] 2. Motor;

[0028] 3. Telescopic sleeve; 301. Fitting groove; 302. First pulley;

[0029] 4. Telescopic column; 401. Protrusion;

[0030] 5. Cutter disc; 501. Blade;

[0031] 6. Belt;

[0032] 7. First rotating shaft; 701. Second pulley; 702. Threaded protrusion;

[0033] 8. Internal thread sleeve;

[0034] 9. Lifting sleeve;

[0035] 10. Sliding sleeve;

[0036] 11. Guide rod;

[0037] 12. Second rotating shaft; 1201. Third pulley; 1202. Tension spring;

[0038] 13. First connecting rod;

[0039] 14. Second connecting rod; 1401. Fitting block;

[0040] 15. Coupling shaft. Specific embodiments

[0041] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0042] Please refer to Figures 1 to 7 , as an embodiment of the present invention, the lawn mower with adjustable mowing height includes a frame 1 and a cutter head 5 provided on the frame 1; a plurality of groups of blades 501 are installed on the cutter head 5;

[0043] A trimming mechanism is provided on the frame 1, and the trimming mechanism can drive the cutter head 5 to rotate, so as to drive a plurality of groups of the blades 501 to rotate, so as to cut the grass higher than the blades 501;

[0044] A height adjustment mechanism is provided on the frame 1, and the height adjustment mechanism can drive the cutter head 5 to approach or move away from the frame 1, so as to change the distance between the blades 501 and the ground;

[0045] A control mechanism is further provided on the frame 1, and the control mechanism can drive the height adjustment mechanism to act when the trimming mechanism acts, so as to meet different operation requirements.

[0046] In this embodiment, when the operator is mowing the lawn, the trimming mechanism drives the cutter head 5 to rotate to drive the blades 501 to rotate, and the high-speed rotating plurality of groups of blades 501 are used to cut and trim the part of the grass higher than the blades 501. Since the trimming mechanism keeps the distance between the blades 501 and the ground unchanged without external force, the overall lawn trimmed by the trimming mechanism is relatively flat.

[0047] The height adjustment mechanism is used to drive the cutter head 5 to approach or move away from the frame 1 to increase or decrease the distance between the blades 501 and the ground, so as to increase or decrease the height of the grass trimmed by the blades 501.

[0048] When it is necessary to adjust the working height of the lawn mower, the trimming mechanism can drive the height adjustment mechanism to act through the control mechanism to achieve height adjustment. Using the control mechanism to control the action of the height adjustment mechanism can ensure the stability of the height when the trimming mechanism is working (that is, avoid the unevenness of the trimmed lawn), and can also adjust the height in time during the trimming work, improve work efficiency, and avoid the occurrence of safety accidents.

[0049] As a further solution of the present utility model, the trimming mechanism includes a motor 2 installed on the frame 1, and a telescopic sleeve 3 rotatably connected to the frame 1 is connected to the output end of the motor 2. A fitting groove 301 is formed in the telescopic sleeve 3, a telescopic column 4 is slidably fitted in the telescopic sleeve 3, a protrusion 401 fitted with the fitting groove 301 is installed on the telescopic column 4, and the cutter head 5 is connected to the telescopic column 4.

[0050] In this embodiment, when the motor 2 is started, the telescopic sleeve 3 will rotate driven by the motor 2. At the same time, the inner wall of the fitting groove 301 will squeeze the protrusion 401, thereby driving the telescopic column 4 to rotate, and the cutter head 5 will also rotate accordingly. The blade 501 rotates at a high speed driven by the cutter head 5, so that the grass higher than the blade 501 can be cut and trimmed.

[0051] When the height adjustment mechanism does not act, there is no sliding friction between the telescopic column 4 and the telescopic sleeve 3, so the working height of the blade 501 remains unchanged to ensure the flatness of the mowing height of the lawn mower.

[0052] As a further solution of the present utility model, the height adjustment mechanism includes a first rotating shaft 7 rotatably installed on the frame 1, a threaded protrusion 702 is installed on the first rotating shaft 7, and an internally threaded sleeve 8 is threadedly connected to the threaded protrusion 702; a lifting sleeve 9 connected to the internally threaded sleeve 8 is rotatably fitted on the telescopic column 4; a guide rod 11 is installed on the frame 1, and a sliding sleeve 10 is slidably fitted on the guide rod 11.

[0053] In this embodiment, when the first rotating shaft 7 rotates, it will drive the threaded protrusion 702 to rotate synchronously, and drive the internally threaded sleeve 8 to approach or move away from the frame 1 on the first rotating shaft 7 through the threaded cooperation with the internally threaded sleeve 8. At the same time, the lifting sleeve 9 will act synchronously; thereby driving the telescopic column 4 to slide inward or outward in the telescopic sleeve 3 to drive the blade 501 to approach or move away from the frame 1, so as to adjust the mowing height of the lawn mower; at the same time, the sliding sleeve 10 will also act synchronously on the guide rod 11 to assist the lifting sleeve 9 to act.

[0054] It rotates through the first rotating shaft 7 to drive the threaded protrusion 702 to be threadedly engaged with the internal threaded sleeve 8, thereby adjusting the height of the blade 501. Therefore, after the first rotating shaft 7 stops rotating, the internal threaded sleeve 8 will remain in place, ensuring that the height of the blade 501 remains unchanged, thus avoiding unevenness of the trimmed lawn.

[0055] As a further solution of the present invention, the control mechanism includes a first pulley 302 installed on the telescopic sleeve 3; an arc-shaped groove 101 is formed on the vehicle frame 1, a second rotating shaft 12 is slidably fitted in the arc-shaped groove 101, a third pulley 1201 is rotatably fitted on the second rotating shaft 12, and the first pulley 302 and the third pulley 1201 are connected by a belt 6; a second pulley 701 is installed on the first rotating shaft 7, and the second pulley 701 is located between the first pulley 302 and the third pulley 1201.

[0056] In this embodiment, the sizes of the first pulley 302 and the third pulley 1201 are larger than the size of the second pulley 701. In the initial position, the second pulley 701 is between the first pulley 302 and the third pulley 1201, and the three are on the same straight line; when the telescopic sleeve 3 rotates, it will drive the first pulley 302 to rotate, and drive the third pulley 1201 to rotate through the belt 6. At this time, the second pulley 701 does not rotate; when the second rotating shaft 12 slides in the arc-shaped groove 101, the position of the third pulley 1201 will change, and the belt 6 will gradually engage with the second pulley 701 as the position of the second rotating shaft gradually changes. As the second rotating shaft 12 slides, the belt 6 will finally be tightly engaged with the first pulley 302, the second pulley 701, and the third pulley 1201, thereby driving the first rotating shaft 7 to rotate to drive the height adjustment mechanism to act. Using the control mechanism to control the height adjustment mechanism to act can ensure the stability of the height when the trimming mechanism works (that is, avoid unevenness of the trimmed lawn), and can also adjust the height in time during the trimming work, improving work efficiency.

[0057] As a further solution of the present invention, the control mechanism further includes a tension spring 1202 installed on the second rotating shaft 12, and the other end of the tension spring 1202 is installed on the vehicle frame 1; a first connecting rod 13 is rotatably installed at the end of the second rotating shaft 12 away from the tension spring 1202, the other end of the first connecting rod 13 is rotatably installed with a coupling shaft 15, a sliding groove 102 is formed on the vehicle frame 1, a fitting block 1401 is slidably fitted in the sliding groove 102, and a second connecting rod 14 rotatably connected to the coupling shaft 15 is installed on the fitting block 1401.

[0058] In this embodiment, the operator pulls the second connecting rod 14 to make the fitting block 1401 slide away from the third rotating shaft 12 in the sliding groove 102. At this time, the first connecting rod 13 will be driven by the coupling shaft 15 to move away from the second rotating shaft 12, so as to drive the second rotating shaft 12 to slide in the arc-shaped groove 101, and the included angle between the first connecting rod 13 and the second connecting rod 14 will gradually increase. When the second rotating shaft 12 slides, it will pull the tension spring 1202, and the elastic force of the tension spring 1202 will gradually increase. After the control mechanism drives the height adjustment mechanism to act, the external force applied to the second connecting rod 14 is released, and the elastic force of the tension spring 1202 will drive the second rotating shaft 12 to reset and always pull the second rotating shaft 12 to prevent the position of the second rotating shaft 12 from being easily changed. Using the control mechanism to control the action of the height adjustment mechanism can ensure the stability of the height when the trimming mechanism works (that is, to avoid the unevenness of the trimmed lawn), and can also adjust the height in time during the trimming work, improve the work efficiency, and avoid the occurrence of safety accidents.

[0059] As a further solution of the present invention, the blade 501 is arc-shaped, and the thickness of its outer arc surface and inner arc surface is relatively thin.

[0060] In this embodiment, the relatively thin thickness on both sides can realize the trimming function regardless of the rotation direction when the blade 501 rotates. The arc-shaped setting can increase the contact area between the blade 501 and the grass to improve the trimming ability.

[0061] As a further solution of the present invention, a handrail frame is installed on the vehicle frame 1, and a handle is installed on the handrail frame.

[0062] In this embodiment, the operator holds the handrail frame tightly through the handle and pushes the vehicle frame 1 forward through the handrail frame to increase the mowing range of the lawn mower.

[0063] The above embodiments are exemplary and not restrictive. Therefore, without departing from the spirit or basic characteristics of the present invention, all technical solutions that can implement the present invention in other specific forms are included in the present invention.

Claims

1. A lawn mower with adjustable mowing height, comprising a frame (1), and a cutter disc (5) arranged on the frame (1); the cutter disc (5) is provided with a plurality of sets of blades (501); It is characterized in that The frame (1) is provided with a trimming mechanism, which can drive the blade disc (5) to rotate, thereby driving the plurality of groups of blades (501) to rotate, so as to cut grass that is higher than the blades (501); The frame (1) is provided with a height adjustment mechanism, and the height adjustment mechanism can drive the blade disc (5) to move closer to or farther away from the frame (1), so that the distance of the blade (501) from the ground changes; The frame (1) is also provided with a control mechanism, which can drive the height adjustment mechanism to move when the trimming mechanism moves, so as to adapt to different operation requirements.

2. A lawn mower with adjustable mowing height according to claim 1, characterized in that: The trimming mechanism comprises a motor (2) mounted on the frame (1); a telescopic sleeve (3) rotatably connected to the frame (1) is connected to the output end of the motor (2); an engaging groove (301) is provided in the telescopic sleeve (3); a telescopic column (4) is slidably engaged in the telescopic sleeve (3); a protrusion (401) engaged with the engaging groove (301) is mounted on the telescopic column (4); and the blade disc (5) is connected to the telescopic column (4).

3. A lawn mower with adjustable mowing height according to claim 2, characterized in that: The height adjustment mechanism comprises a first rotating shaft (7) rotatably mounted on the vehicle frame (1); a threaded protrusion (702) is mounted on the first rotating shaft (7); an internal threaded sleeve (8) is threadedly connected to the threaded protrusion (702); a lifting sleeve (9) connected to the internal threaded sleeve (8) is rotatably engaged on the telescopic column (4); and a guide rod (11) is mounted on the vehicle frame (1); a sliding sleeve (10) is slidably engaged on the guide rod (11).

4. A lawn mower with adjustable mowing height according to claim 3, characterized in that: The control mechanism comprises a first pulley (302) mounted on the telescopic sleeve (3); an arc-shaped groove (101) is provided on the frame (1), a second rotating shaft (12) is slidably engaged in the arc-shaped groove (101), a third pulley (1201) is rotatably engaged on the second rotating shaft (12), and the first pulley (302) and the third pulley (1201) are connected via a belt (6); a second pulley (701) is mounted on the first rotating shaft (7), and the second pulley (701) is located between the first pulley (302) and the third pulley (1201).

5. A lawn mower with adjustable mowing height according to claim 4, characterized in that: The control mechanism further comprises a tension spring (1202) mounted on the second rotating shaft (12), the other end of the tension spring (1202) being mounted on the vehicle frame (1); a first connecting rod (13) being rotatably mounted on one end of the second rotating shaft (12) away from the tension spring (1202), a connecting shaft (15) being rotatably mounted on the other end of the first connecting rod (13), a sliding groove (102) being provided on the vehicle frame (1), an engaging block (1401) being slidably engaged in the sliding groove (102), and a second connecting rod (14) rotatably connected to the connecting shaft (15) being mounted on the engaging block (1401).

6. The lawn mower with adjustable mowing height according to claim 1, characterized in that: The blade (501) is arc-shaped, and the thickness of the outer arc surface and the inner arc surface are relatively thin.

7. The lawn mower with adjustable mowing height according to claim 1, characterized in that: An armrest frame is installed on the vehicle frame (1), and a handle is installed on the armrest frame.

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