A lawn mower

Abstract

The present invention provides a lawn mower, comprising a housing; a cutter assembly, the cutter assembly being movable in a direction perpendicular to the working plane; a driving assembly, the driving assembly including a prime mover fixedly installed on the housing and a transmission mechanism; the transmission mechanism is used to transmit the power output by the prime mover to the cutter assembly to drive the cutter assembly to work; and a height adjustment assembly, the height adjustment assembly is used to drive the cutter assembly to move in a direction perpendicular to the working plane to adjust the ground clearance of the cutter assembly. Compared with the prior art, the lawn mower of the present invention directly adjusts the ground clearance of the cutter assembly through the height adjustment assembly without adjusting the position of the heavy motor, thereby reducing the bearing capacity of the height adjustment assembly and making the height adjustment assembly not easily damaged; and, with such a setting, the overall volume of the lawn mower can be effectively reduced, thereby reducing the manufacturing, packaging, and transportation costs of the lawn mower.

Description

Technical Field

[0001] The present invention relates to a lawn mower, and more particularly to a lawn mower with adjustable cutting height. Background Art

[0002] A lawn mower is a mechanical tool for trimming lawns, vegetation, etc., which can effectively improve the weeding efficiency of workers and reduce the labor intensity of workers. However, different users have different requirements for the lawn height. For this reason, R & D personnel have designed a lawn mower with adjustable cutting height so that users can freely choose the cutting height.

[0003] At present, a lawn mower with a height adjustment system generally includes a motor, a cutter head fixedly installed on the output shaft of the motor, and a height adjustment mechanism for driving the motor to move up and down. When adjusting the cutting height, the height adjustment mechanism drives the motor to move up and down, thereby driving the cutter head installed on the output shaft to move to adjust the ground clearance of the cutter head, and thus achieving the purpose of adjusting the cutting height. Since the height adjustment mechanism drives the motor to move up and down, and the motor is relatively heavy, it is more laborious for users to adjust the cutting height. Moreover, due to the relatively heavy motor, the height adjustment mechanism is prone to damage. In addition, since the height adjustment mechanism drives the motor and the cutter head to move together, the lawn mower needs to reserve a large space for the motor and the cutter head to move. In this way, the overall volume of the lawn mower is increased, thereby increasing the manufacturing, packaging, and transportation costs of the lawn mower.

[0004] In view of the above problems, it is necessary to provide a new lawn mower to solve the above problems. Summary of the Invention

[0005] The purpose of the present invention is to provide a lawn mower, which directly adjusts the ground clearance of the cutter assembly through a height adjustment component without adjusting the position of the heavy motor, thereby reducing the bearing capacity of the height adjustment component and making the height adjustment component not easily damaged; and, such a setting can effectively reduce the overall volume of the lawn mower, thereby reducing the manufacturing, packaging, and transportation costs of the lawn mower.

[0006] To achieve the above object, the present invention provides a lawn mower, including: a housing; a cutter assembly, the cutter assembly being movable in a direction perpendicular to the working plane; a driving assembly, the driving assembly including a prime mover fixedly installed on the housing and a transmission mechanism; the transmission mechanism is used to transmit the power output by the prime mover to the cutter assembly to drive the cutter assembly to work; and a height adjustment component, the height adjustment component is used to drive the cutter assembly to move in a direction perpendicular to the working plane to adjust the ground clearance of the cutter assembly.

[0007] As a further improvement of the present invention, the transmission mechanism includes a transmission rod cooperating with the prime mover and a transmission shaft mounted on the transmission rod and rotatable under the drive of the transmission rod; the transmission shaft can slide along the transmission rod in the axial direction of the transmission shaft, and the cutter assembly is fixedly installed at one end of the transmission shaft facing away from the transmission rod.

[0008] As a further improvement of the present invention, the prime mover has an output shaft and an output wheel mounted on the output shaft; the transmission rod is provided with a transmission wheel cooperating with the output wheel to drive the transmission rod to rotate through the cooperation of the output wheel and the transmission wheel.

[0009] As a further improvement of the present invention, the transmission wheel is located at one end of the transmission rod facing away from the transmission shaft.

[0010] As a further improvement of the present invention, the transmission rod is in the shape of a hollow cylinder, and its inner wall has a guide rail arranged along the axial direction of the transmission rod; a guiding portion cooperating with the guide rail is provided on the transmission shaft to guide the transmission shaft to slide along the guide rail.

[0011] As a further improvement of the present invention, the transmission shaft is in the shape of a hollow cylinder, and its inner wall is provided with internal height-adjusting threads; the height-adjusting assembly includes a height-adjusting rod, and the height-adjusting rod is provided with external height-adjusting threads cooperating with the internal height-adjusting threads, so as to drive the transmission shaft to move along the guide rail through the cooperation of the internal height-adjusting threads and the external height-adjusting threads, and further adjust the ground clearance of the cutter assembly; the height-adjusting rod is arranged inside the transmission rod.

[0012] As a further improvement of the present invention, the height-adjusting assembly further includes a height-adjusting knob cooperating with the height-adjusting rod to drive the height-adjusting rod to rotate; one end of the height-adjusting rod facing away from the transmission shaft passes through the transmission rod and protrudes outside the transmission rod to cooperate with the height-adjusting knob.

[0013] As a further improvement of the present invention, the outer wall of the transmission shaft is provided with external height-adjusting threads; the height-adjusting assembly includes an adjusting sleeve, and the adjusting sleeve is fixedly installed at one end of the transmission rod close to the transmission shaft, and its inner wall is provided with internal height-adjusting threads cooperating with the external height-adjusting threads of the transmission shaft to drive the transmission shaft to move along the guide rail through the cooperation of the external height-adjusting threads and the internal height-adjusting threads, so as to adjust the ground clearance of the cutter assembly.

[0014] As a further improvement of the present invention, the transmission mechanism further includes a bearing fixedly installed on the transmission shaft and a bearing seat installed on the housing and cooperating with the bearing; a travel groove cooperating with the bearing seat is provided on the housing, and the height adjustment assembly drives the bearing seat to move along the travel groove, thereby driving the transmission shaft to move along the guide rail, and further realizing the adjustment of the ground clearance of the cutter assembly.

[0015] As a further improvement of the present invention, the outer wall of the transmission rod has a guide rail arranged along the axial direction of the transmission rod; the transmission shaft is in the shape of a hollow cylinder, and a guiding portion cooperating with the guide rail is provided on its inner wall to guide the transmission shaft to slide along the guide rail.

[0016] As a further improvement of the present invention, the transmission mechanism includes a turbine cooperating with the prime mover and a worm cooperating with the turbine; the cutter assembly is installed at one end of the worm away from the turbine.

[0017] The beneficial effects of the present invention are as follows: The lawn mower of the present invention directly adjusts the ground clearance of the cutter assembly through the height adjustment assembly without adjusting the position of the heavy motor, thereby reducing the bearing capacity of the height adjustment assembly and making the height adjustment assembly not easily damaged; moreover, this setting can effectively reduce the overall volume of the lawn mower, thereby reducing the manufacturing, packaging, and transportation costs of the lawn mower. Brief Description of the Drawings

[0018] Figure 1 is a perspective structural view of the lawn mower of the present invention.

[0019] Figure 2 is a structural view of the drive assembly and the cutter assembly.

[0020] Figure 3 is Figure 2 a cross-sectional view of the cooperation between the drive assembly and the cutter assembly shown.

[0021] Figure 4 is a cross-sectional view of the transmission rod.

[0022] Figure 5 is a perspective structural view of the transmission shaft.

[0023] Figure 6 is a schematic diagram of the cooperation between the height adjustment knob and the locking knob.

[0024] Figure 7 is a perspective structural view of the height adjustment rod.

[0025] Figure 8 is Figure 3 a partial enlarged view of... Detailed Description of the Embodiment

[0026] To make the objectives, technical solutions, and advantages of the present invention clearer, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0027] Please refer to Figure 1 and Figure 2 As shown, the present invention discloses a lawn mower 100, which includes a housing 10, a cutter assembly 20, a driving assembly 30 for driving the cutter assembly 20 to work, a height-adjusting assembly 40 for adjusting the ground clearance of the cutter assembly 20, and a traveling assembly 50.

[0028] Please refer to Figure 1 As shown, the traveling assembly 50 includes a front wheel 51 and a pair of rear wheels 52. The front wheel 51 and the rear wheels 52 are mounted on the housing 10 to facilitate the traveling of the lawn mower 100. Preferably, the lawn mower 100 is further provided with a motor for driving the rear wheels 52 to rotate. The cutter assembly 20 includes a cutter disc 21 and blades 22 pivotally mounted on the periphery of the cutter disc 21. When the cutter assembly 20 is working, the plane where the blades 22 are located is the working plane.

[0029] Please refer to Figure 2 , Figure 3 , Figure 4 and Figure 5As shown, the driving assembly 30 includes a prime mover 31 fixedly installed on the housing 10 and a transmission mechanism 32 that transmits the power output by the prime mover 31 to the cutter assembly 20. The prime mover 31 can be an electric motor, a gasoline engine, etc. The prime mover 31 further includes an output shaft 311 and an output wheel 312 fixedly installed on the output shaft 311. The output wheel 312 is provided with output wheel teeth 3121. The transmission mechanism 32 includes a transmission rod 321 that cooperates with the prime mover 31 and a transmission shaft 322 installed on the transmission rod 321 and rotatable under the drive of the transmission rod 321. The transmission rod 321 is in the shape of a hollow cylinder, and is provided with a through groove 3211 that axially penetrates the transmission rod 321 along the transmission shaft 322. Guide rails 3212 are provided on the side wall of the through groove 3211 along the axial direction of the transmission rod 321. In this embodiment, the number of the guide rails 3212 is four, but in other embodiments, the number of the guide rails 3212 can be set as required. One end of the transmission rod 321 facing away from the transmission shaft 322 is further provided with a transmission wheel 3213 that cooperates with the output wheel 312, so as to drive the transmission rod 321 to rotate through the cooperation of the output wheel 312 and the transmission wheel 3213. The transmission wheel 3213 is provided with transmission wheel teeth 3214 that mesh with the output wheel teeth 3121. In this embodiment, the output wheel 312 and the transmission wheel 3213 transmit power through the output wheel teeth 3121 and the transmission wheel teeth 3214, but in other embodiments, the output wheel 312 and the transmission wheel 3213 can also transmit power through a belt. One side of the transmission wheel 3213 facing away from the transmission shaft 322 is provided with a first locking tooth 3215, and one side thereof facing the transmission shaft 322 is provided with a first cooperation tooth 3216.

[0030] Please refer to Figure 3 and Figure 5 As shown, the transmission shaft 322 can slide along the transmission rod 321 in the axial direction of the transmission shaft 322, and the cutter assembly 20 is fixedly installed at one end of the transmission shaft 322 facing away from the transmission rod 321. The transmission shaft 322 is generally in the shape of a hollow cylinder, and its inner wall is provided with an internal height adjustment thread 3221. The outer wall of the transmission shaft 322 is provided with a guiding portion 3222 that cooperates with the guide rail 3212 to guide the transmission shaft 322 to slide along the guide rail 3212. In this embodiment, the guide rail 3212 is a groove, and the guiding portion 3222 is a protrusion that cooperates with the groove; however, in other embodiments, the guide rail 3212 can also be a protrusion, and the guiding portion 3222 can also be a groove that cooperates with the protrusion.

[0031] In this embodiment, the guide rail 3212 is arranged on the inner wall of the transmission rod 321, and the transmission shaft 322 is at least partially located inside the transmission rod 321. However, it can be understood that in other embodiments, the guide rail 3212 can also be arranged on the outer wall of the transmission rod 321. In this case, the guide portion 3222 is arranged on the inner wall of the transmission shaft 322, and the transmission rod 321 is at least partially located inside the transmission shaft 322.

[0032] See also Figure 2 , Figure 3 as well as Figure 6 , Figure 7 As shown, the height adjustment assembly 40 is used to drive the cutter assembly 20 to move in a direction perpendicular to the working plane (i.e., the axial direction of the transmission shaft 322) to adjust the distance of the cutter assembly 20 from the ground. The height adjustment assembly 40 includes a height adjustment rod 41 that drives the transmission shaft 322 to slide along the transmission rod 321, a height adjustment knob 42 that drives the height adjustment rod 41 to rotate, a first elastic element (not shown) matched with the height adjustment knob 42, a second elastic element 43 matched with the height adjustment rod 41, and a locking knob 44 matched with the transmission wheel 3213. One end of the height adjustment rod 41 matches with the transmission shaft 322, and the other end passes through the through slot 3211 and protrudes out of the through slot 3211 to match with the height adjustment knob 42. The end of the height adjustment rod 41 close to the transmission shaft 322 is provided with an outer height adjustment thread 411 matched with the inner height adjustment thread 3221, so that the transmission shaft 322 is driven to move along the upper guide rail 3212 by the cooperation of the inner height adjustment thread 3221 and the outer height adjustment thread 411, thereby adjusting the distance of the cutting knife assembly 20 from the ground. The end of the height adjustment rod 41 away from the outer height adjustment thread 411 is also provided with a first driving tooth 412 and a second coordinated tooth 413, and the first driving tooth 412 and the second coordinated tooth 413 are located on both sides of the transmission wheel 3213. The height adjustment knob 42 is slidably mounted on the housing 10 and can slide along the axial direction of the height adjustment rod 41. The side of the height adjustment knob 42 facing the height adjustment rod 41 is provided with a second driving tooth 421 matched with the first driving tooth 412. One end of the first elastic element is mounted on the housing 10, and the other end is mounted on the height adjustment knob 42, so that the height adjustment knob 42 is reset. The second elastic element 43 is located between the transmission wheel 3213 and the second cooperative tooth 413. The locking knob 44 is provided with a second locking tooth 441 that matches the first locking tooth 3215 to lock the transmission wheel 3213. The locking knob 44 is provided with a receiving groove 442 for receiving the height adjustment knob 42, and the locking knob 44 and the height adjustment knob 42 are coaxial.

[0033] When adjusting the distance of the cutting blade assembly 20 from the ground, that is, the mowing height of the cutting blade assembly 20, first push the height adjustment knob 42 and the locking knob 44 toward the height adjustment rod 41, so that the height adjustment knob 42 slides toward the height adjustment rod 41 and abuts against the height adjustment rod 41, and the locking knob 44 abuts against the transmission wheel 3213. At this time, the height adjustment knob 42 and the locking knob 44 are in the first state, the first elastic element and the second elastic element 43 are elastically deformed, the first driving tooth 412 and the second driving tooth 421 are meshed, the first locking tooth 3215 and the second locking tooth 441 are meshed to lock the transmission wheel 3213, and the first cooperative tooth 3216 and the second cooperative tooth 413 are disengaged. Since the locking knob 44 cannot rotate, when the first locking tooth 3215 and the second locking tooth 441 are engaged, the transmission wheel 3213 cannot rotate; and since the first cooperative tooth 3216 and the second cooperative tooth 413 are disengaged, the height adjustment rod 41 can rotate under the drive of the height adjustment knob 42, thereby driving the transmission shaft 322 to slide along the transmission rod 321 through the cooperation of the inner height adjustment thread 3221 and the outer height adjustment thread 411, thereby achieving the adjustment of the height of the cutting knife assembly 20 from the ground. When the height adjustment knob 42 and the locking knob 44 are released, the height adjustment knob 42 and the locking knob 44 are reset under the action of the first elastic element. At this time, the height adjustment knob 42 and the locking knob 44 are in the second state, the first driving tooth 412 and the second driving tooth 421 are disengaged, the first locking tooth 3215 and the second locking tooth 441 are disengaged to unlock the transmission wheel 3213, and the second elastic element 43 is reset, so that the first cooperative tooth 3216 and the second cooperative tooth 413 are engaged. Since the first cooperative tooth 3216 and the second cooperative tooth 413 are engaged, the height adjustment rod 41 can rotate under the drive of the transmission wheel 3213.

[0034] In this embodiment, the second elastic element 43 is disposed between the first driving tooth 412 and the transmission wheel 3213. However, in other embodiments, the second elastic element 43 may also be disposed between the transmission wheel 3213 and the first cooperative tooth 3216, in which case the second elastic element 43 is a tension spring. Of course, it is understood that in other embodiments, the second elastic element 43 may also be disposed on the side of the first cooperative tooth 3216 away from the first driving tooth 412, in which case one end of the second elastic element 43 is mounted on the driving rod 41, and the other end is mounted on the transmission rod 321.

[0035] In other embodiments, the outer wall of the transmission shaft 322 may also be provided with an external height adjustment thread (not shown), and in this case, the height adjustment assembly 40 includes an adjustment sleeve (not shown). The adjustment sleeve is fixedly mounted on one end of the transmission rod 321 close to the transmission shaft 322, and its inner wall is provided with an internal height adjustment thread that matches the external height adjustment thread of the transmission shaft 322, so that the transmission shaft 322 is driven to move along the guide rail 3212 through the cooperation of the external height adjustment thread and the internal height adjustment thread, thereby adjusting the distance of the cutter assembly 20 from the ground.

[0036] It is understandable that, in other embodiments, the transmission mechanism 32 may further include a bearing (not shown) fixedly mounted on the transmission shaft 322 and a bearing seat (not shown) mounted on the housing 10 and matched with the bearing. The housing 10 is provided with a travel groove (not shown) matched with the bearing seat. The height adjustment assembly 40 drives the bearing seat to move along the travel groove, thereby driving the transmission shaft 322 to move along the guide rail 3212, thereby adjusting the distance of the cutting knife assembly 20 from the ground.

[0037] Of course, it is understood that in other embodiments, the transmission mechanism 32 may also be a turbine (not shown) matched with the prime mover 31 and a worm (not shown) matched with the turbine, and the end of the worm away from the turbine is equipped with the cutter assembly 20. In this embodiment, the worm is driven to rotate by the turbine, thereby driving the cutter assembly 20 to work. When adjusting the distance of the cutter assembly 20 from the ground, the worm is driven to move in a direction perpendicular to the working plane by the height adjustment assembly 40.

[0038] Compared with the prior art, the lawn mower 100 of the present invention directly adjusts the height of the cutter assembly 20 from the ground through the height adjustment assembly 40 without adjusting the position of the bulky motor, thereby reducing the bearing capacity of the height adjustment assembly 40 and making the height adjustment assembly 40 less susceptible to damage; and such a setting can effectively reduce the overall volume of the lawn mower, thereby reducing the manufacturing, packaging and transportation costs of the lawn mower.

[0039] The above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the present invention.

Claims

1. A lawn mower, characterized in that, Comprising: A housing; A cutter assembly, which can move in a direction perpendicular to the working plane; A driving assembly, which includes a prime mover fixedly installed on the housing and a transmission mechanism; the transmission mechanism is used to transmit the power output by the prime mover to the cutter assembly to drive the cutter assembly to work; And A height adjustment assembly, which is used to drive the cutter assembly to move in a direction perpendicular to the working plane to adjust the ground clearance of the cutter assembly; The prime mover has an output shaft and an output wheel installed on the output shaft. The transmission mechanism includes a transmission wheel that cooperates with the output wheel. The height adjustment assembly includes a height adjustment rod, a height adjustment knob for driving the height adjustment rod to rotate, and a locking knob that cooperates with the transmission wheel; when the height adjustment knob and the locking knob are in the first state, the height adjustment knob meshes with the height adjustment rod, the locking knob meshes with the transmission wheel, the height adjustment rod is displaced to disengage from the transmission wheel, and the height adjustment knob drives the height adjustment rod to rotate to achieve height adjustment; when the height adjustment knob and the locking knob are in the second state, the height adjustment knob disengages from the height adjustment rod, the locking knob disengages from the transmission wheel, the height adjustment rod resets to mesh with the transmission wheel, and the transmission wheel drives the height adjustment rod to rotate.

2. The lawn mower according to claim 1, characterized in that: The transmission mechanism includes a transmission rod that cooperates with the prime mover and a transmission shaft installed on the transmission rod that can rotate under the drive of the transmission rod; The transmission shaft can slide along the transmission rod in the axial direction of the transmission shaft, and the cutter assembly is fixedly installed at one end of the transmission shaft away from the transmission rod.

3. The lawn mower according to claim 2, characterized in that: The transmission wheel is arranged on the transmission rod and cooperates with the output wheel to drive the transmission rod to rotate through the cooperation of the output wheel and the transmission wheel.

4. The lawn mower according to claim 3, characterized in that: The transmission wheel is located at one end of the transmission rod away from the transmission shaft.

5. The lawn mower according to claim 2, characterized in that: The transmission rod is in the shape of a hollow cylinder, and its inner wall has a guide rail arranged along the axial direction of the transmission rod; a guiding portion that cooperates with the guide rail is provided on the transmission shaft to guide the transmission shaft to slide along the guide rail.

6. The lawn mower according to claim 5, characterized in that: The transmission shaft is in the shape of a hollow cylinder, and an internal height adjustment thread is provided on its inner wall; an external height adjustment thread that cooperates with the internal height adjustment thread is provided on the height adjustment rod, so as to drive the transmission shaft to move along the guide rail through the cooperation of the internal height adjustment thread and the external height adjustment thread, and further adjust the ground clearance of the cutter assembly; the height adjustment rod is arranged inside the transmission rod.

7. The lawn mower according to claim 6, characterized in that: The height adjustment knob cooperates with the height adjustment rod to drive the height adjustment rod to rotate; one end of the height adjustment rod away from the transmission shaft passes through the transmission rod and protrudes outside the transmission rod to cooperate with the height adjustment knob.

8. The lawn mower according to claim 2, characterized in that: The outer wall of the transmission rod has a guide rail arranged along the axial direction of the transmission rod; the transmission shaft is in the shape of a hollow cylinder, and a guiding portion that cooperates with the guide rail is provided on its inner wall to guide the transmission shaft to slide along the guide rail.

9. The lawn mower according to claim 1, characterized in that: The transmission mechanism includes a turbine that cooperates with the prime mover and a worm that cooperates with the turbine; the cutter assembly is installed at one end of the worm away from the turbine.

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