CN211909683U

CN211909683U - Height adjusting device and mower with same

Info

Publication number: CN211909683U
Application number: CN201921983950.5U
Authority: CN
Inventors: 徐锋; 王锐; 陈亚明; 姚远; 冯春亭; 吴迪
Original assignee: FJ Dynamics Technology Co Ltd
Current assignee: FJ Dynamics Technology Co Ltd
Priority date: 2019-11-15
Filing date: 2019-11-15
Publication date: 2020-11-13
Anticipated expiration: 2029-11-15

Abstract

The utility model discloses a heightening device and lawn mower with heightening device, wherein the lawn mower with heightening device includes a fuselage, a trimming means and a heightening device, wherein heightening device includes a drive unit and an adjusting unit, drive unit set up in the fuselage, adjusting unit set up in the fuselage, just adjusting unit be driveably connect in drive unit, wherein trimming means set up in adjusting unit, with by heightening device keeps adjustably trimming means in the lower part space of fuselage, and then can be through changing trimming means with the mode of the relative position of fuselage changes trimming means's terrain clearance.

Description

Height adjusting device and mower with same

Technical Field

The utility model relates to a mowing machine, in particular to a heightening device and a mowing machine with the heightening device.

Background

Along with the improvement of living standard of people, the greening consciousness of people is gradually enhanced, and the requirements on the surrounding environment are higher and higher. In recent years, the coverage of green lawns and other vegetation has been increasing, and with this, the amount of work for trimming and managing various vegetation has become enormous, and workers have to spend a lot of time and effort managing lawns and vegetation. And the lawn mower replaces a manual mowing mode, and mechanically mows the lawn and the vegetation, so that the operation efficiency is greatly improved, and the labor intensity and the labor cost are reduced. Therefore, the lawn mower is widely used in daily life, agricultural production, and gardening. Particularly, the riding mower not only can efficiently repair vegetation, but also improves the working environment and comfort of workers.

Generally, the vegetation grows in different growth vigors depending on the type of vegetation, and the height of the vegetation repaired by the mower needs to be adjusted according to actual conditions. Increasingly, lawn mowers are available in the market where the height of the mowing structure is allowed to be adjusted. Specifically, a conventional lawn mower includes a main body, a mowing mechanism, and an elevation mechanism connected to the main body and the mowing mechanism, and the elevation mechanism is operated to change a relative position between the mowing mechanism and the main body, thereby adjusting a height of the mowing mechanism and a ground surface, so that vegetation repaired by the lawn mower can be maintained at different heights. However, the existing lawn mowers still have a lot of problems in the actual use process.

Firstly, the height-adjusting mechanism of the existing mower is a manual height-adjusting mechanism, which is complex to operate and affects the trimming efficiency and progress of the mower. Specifically, before the height of the mowing mechanism from the ground needs to be adjusted, an operator needs to stop running and working of the mowing machine, then manually release the restriction on the mowing mechanism which is kept at a fixed position so that the height of the mowing mechanism is allowed to be adjusted, further operate the height adjusting mechanism, and when the height of the mowing mechanism from the ground meets the requirement, the height adjusting mechanism restricts the mowing mechanism to the fixed position again, and then the mowing machine can be started again. Manually operation the structure of increaseing is not only loaded down with trivial details, has reduced moreover the operating efficiency of lawn mower. In addition, the heightening mechanism is complex in structure, the mowing mechanism is provided with a sharp cutter head, and great potential safety hazards exist in manual operation.

Secondly, the ground clearance of the mowing mechanism is changed only after manual adjustment, namely, the ground clearance of the mowing mechanism of the mower is kept unchanged all the time in the running process of the mower, if an operator does not notice an obstacle which is hidden in vegetation and has a size larger than the ground clearance of the mowing mechanism, such as a stone, when the mowing mechanism trims the vegetation, the stone directly impacts on a cutter head of the mowing mechanism rotating at a high speed, and the mowing mechanism is damaged. Therefore, the flexibility and the automation degree of the existing mower are low, the requirement on the operation level of operators is high, the service life of a cutter head of the mowing mechanism is short, and the maintenance cost of the existing mower is high.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a heightening device and lawn mower with heightening device, wherein heightening device can be applied to the lawn mower, by height adjusting device can adjust a trimming means's terrain clearance of lawn mower, thereby, quilt the high permission of vegetation after the lawn mower was pruned is controlled and can be accorded with user's demand, has improved lawn mower's suitability and practicality.

Another object of the present invention is to provide a height-adjusting device and a lawn mower with the same, wherein the height-adjusting device can be automatically adjusted the lawn mower the trimming device with the relative position of a body of the lawn mower is favorable for avoiding in time the trimming device is damaged by the impact of the obstacle, thereby improving the automation degree and flexibility of the lawn mower.

Another object of the present invention is to provide a height-adjusting device and a lawn mower with the same, wherein the height-adjusting device can adjust the in-process that the lawn mower traveled the height from ground of the trimming device, thereby improving the operating efficiency of the lawn mower.

Another object of the present invention is to provide a height-adjusting device and a mower with a height-adjusting device, wherein the height-adjusting device allows the trimming device to automatically change the ground clearance when touching the obstacle hidden in the vegetation, and avoid the obstacle in time, reduce the impact of receiving the obstacle, thereby being beneficial to improving the service life of the trimming device, reducing the maintenance cost of the mower.

Another object of the utility model is to provide a heightening device and lawn mower with heightening device, wherein heightening device allows manual regulation, and then can adjust manually trimming means's terrain clearance is favorable to further ensuring to be adjusted after trimming means is kept the level, thereby the guarantee trimming means's equilibrium is favorable to the roughness of the vegetation after being pruned simultaneously.

Another object of the present invention is to provide a heightening device and a grass mower with the same, wherein the heightening device has a simple structure and a reduced overall weight.

Another object of the present invention is to provide a height-adjusting device and a lawn mower with the same, wherein the height-adjusting device includes a driving unit and an adjusting unit, the adjusting unit is drivably connected to the driving unit, the trimming device and the main body is respectively connected to the adjusting unit, by the driving unit automatically drives the adjusting unit, so as to pass through the adjusting unit changes the trimming device with the relative position of the main body, and then automatically adjusts the ground clearance of the trimming device.

Another object of the present invention is to provide a height-adjusting device and a lawn mower with the same, wherein the height of at least one pushing forearm of the adjusting unit is allowed to be adjusted, and then the height of at least one pushing forearm of the adjusting unit is changed to change the height of the mowing device from the ground.

According to an aspect of the utility model, the utility model discloses a heightening device is further provided, and it includes:

a driving unit; and

an adjustment unit, wherein the adjustment unit comprises two front shafts, a rear shaft, two front mounting members, two rear mounting members, two front pivoting arms, two rear pivoting arms, two front pushing arms, two rear pushing arms, and two connecting arms, wherein two of the front shafts are independent of each other, two of the front mounting members are respectively mounted on the two front shafts, wherein the middle portions of the two front pivoting arms are respectively disposed on the two front shafts, the two ends of the rear shaft are respectively rotatably mounted on the two rear mounting members, and the rear shaft is drivably connected to the driving unit, wherein the middle portion of each of the rear pivoting arms is respectively disposed on the two ends of the rear shaft, wherein the two front pushing arms are respectively rotatably mounted on the outer ends of the front arms of the two front pivoting arms, wherein the two rear pushing arms are respectively rotatably mounted on the outer ends of the rear arms of the two rear pivoting arms, wherein both ends of each connecting arm are respectively and rotatably mounted at the inner end of the front arm of the pivoting front arm and the inner end of the rear arm of the pivoting rear arm.

According to an embodiment of the invention, the pushing forearm comprises a mounting portion and a movable portion extending downwardly from the mounting portion, wherein the mounting portion is operatively mounted to the pivoting forearm and the relative positions of the mounting portion and the pivoting forearm are allowed to be adjusted.

According to an embodiment of the invention, the movable part extends downwardly from the fitting part in a curved manner.

According to an embodiment of the invention, the movable part is ring-shaped.

According to an embodiment of the invention, the adjustment unit further has two fittings, wherein the fittings comprise a fitting arm, a mounting arm and a retaining arm, wherein the mounting arm integrally extends over the fitting arm, both ends of the retaining arm are connected to the mounting arm and the pivoting front arm, respectively, which is operatively mounted to the retaining arm.

According to an embodiment of the present invention, the retaining arm has a fitting through hole, and the pivot front arm is retained to the pivot through hole movably up and down.

According to an embodiment of the present invention, the length dimension of the pushing forearm is greater than the length dimension of the pushing rear arm.

According to an embodiment of the present invention, a difference between a length dimension of the front arm and a length dimension of the rear arm ranges from 3mm to 6 mm.

According to an aspect of the utility model, the utility model discloses a further provide a lawn mower with increase device, it includes:

a body;

a trimming device; and

an elevation adjustment apparatus, wherein the elevation adjustment apparatus comprises a driving unit and an adjusting unit, wherein the adjusting unit comprises two front rotating shafts, a rear rotating shaft, two front mounting members, two rear mounting members, two front pivoting arms, two rear pivoting arms, two front pushing arms, two rear pushing arms, and two connecting arms, wherein the two front rotating shafts are independent of each other, the two front mounting members are respectively mounted on the two front rotating shafts, wherein the middle portions of the two front pivoting arms are respectively disposed on the two front rotating shafts, the two ends of the rear rotating shaft are respectively rotatably mounted on the two rear mounting members, and the rear rotating shaft is drivably connected to the driving unit, wherein the middle portion of each rear pivoting arm is respectively disposed on the two ends of the rear rotating shaft, wherein the two front pushing arms are respectively rotatably mounted on the outer ends of the front arms of the two front pivoting arms, wherein two of the rear pushing arms are rotatably mounted at outer ends of rear arms of the two rear pivoting arms, respectively, wherein both ends of each of the connecting arms are rotatably mounted at inner ends of front arms of the front pivoting arms and inner ends of rear arms of the rear pivoting arms, respectively, wherein two of the front mounting members are provided at the body, two of the rear mounting members are provided at the body, respectively, lower end portions of two of the front pushing arms are provided at the trimming device, respectively, and lower end portions of two of the rear pushing arms are provided at the trimming device, respectively.

Drawings

Fig. 1 is a perspective view of a lawn mower according to a preferred embodiment of the present invention.

Fig. 2 is an exploded view of the lawn mower according to the above preferred embodiment of the present invention.

Fig. 3 is a perspective view of an elevation device of the lawn mower according to the above preferred embodiment of the present invention.

Fig. 4 is an exploded view of the height adjusting device of the lawn mower according to the above preferred embodiment of the present invention.

Fig. 5A is a schematic side view of a state of the lawnmower according to the above preferred embodiment of the present invention.

Fig. 5B is a perspective view of the height-adjusting device of the lawn mower according to the above preferred embodiment of the present invention in the above state.

Fig. 6A is a schematic side view of another state of the lawnmower according to the above preferred embodiment of the present invention.

Fig. 6B is a perspective view of the height-adjusting device of the lawn mower according to the above preferred embodiment of the present invention in the above state.

Fig. 7A is a schematic side view of another state of the lawnmower according to the above preferred embodiment of the present invention.

Fig. 7B is a schematic side view of another state of the lawnmower according to the above preferred embodiment of the present invention.

Detailed Description

The following description is presented to disclose the invention so as to enable any person skilled in the art to practice the invention. The preferred embodiments in the following description are given by way of example only, and other obvious variations will occur to those skilled in the art. The basic principles of the invention, as defined in the following description, may be applied to other embodiments, variations, modifications, equivalents and other technical solutions without departing from the spirit and scope of the invention.

It will be understood by those skilled in the art that in the present disclosure, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in a generic and descriptive sense only and not for purposes of limitation, as the terms are used in the description to indicate that the referenced device or element must have the specified orientation, be constructed and operated in the specified orientation, and not for the purposes of limitation.

It is understood that the terms "a" and "an" should be interpreted as meaning that a number of one element or element is one in one embodiment, while a number of other elements is one in another embodiment, and the terms "a" and "an" should not be interpreted as limiting the number.

Referring to fig. 1 to 7B of the present disclosure, an heightening device 100 according to a preferred embodiment of the present invention is disclosed and explained in the following description, wherein the heightening device 100 is applied to a mower 1000 to change the ground clearance of a trimming device 300 of the mower 1000, so that the mower 1000 is suitable for trimming vegetation of different growth and topography and can avoid obstacles in time in the process of trimming vegetation to prevent the trimming device 300 from being damaged. Thus, the utility and flexibility of the mower 1000 is improved by the height adjustment device 100.

Further, the height adjusting device 100 can automatically adjust the relative position of the trimming device 300 and a body 200 of the lawn mower 1000, and then automatically lift the trimming device 300 to change the height of the trimming device 300 from the ground, thereby improving the automation degree of the lawn mower 100. Furthermore, the height-adjusting device 100 is also allowed to be manually adjusted, thereby indirectly changing the relative position between the trimming device 300 and the main body 200 by changing the relative position of the height-adjusting device 100 and the main body 200, and thus changing the height of the trimming device 300 from the ground.

Specifically, the lawn mower 1000 with the height-adjusting device 100 comprises the height-adjusting device 100, the main body 200 and the trimming device 300, wherein the height-adjusting device 100 is arranged in the lower space of the main body 200, the trimming device 300 is adjustably arranged in the height-adjusting device 100, so that the trimming device 300 is adjustably held in the lower space of the main body 200 by the height-adjusting device 100, and thus the height-adjusting device 100 can automatically adjust the relative positions of the trimming device 300 and the main body 200 to adjust the height of the trimming device 300 from the ground according to actual needs, and the height-adjusting device 100 keeps the height of the trimming device 300 from the ground in an adjusted state.

Referring to fig. 1, the body 200 includes a body 210, a power unit 220, and a set of wheels 230, the power unit 220 is disposed on the body 210, each of the wheels 230 is disposed at the front and rear of each side of the body 210, and each of the wheels 230 can be directly or indirectly connected to the power unit 220, so that each of the wheels 230 can move the body 200 when the power unit 220 provides power. It is worth mentioning that the type of the body 200 is not limited, the specific embodiment of the body 200 is only an example, and the height-adjusting device 100 may be applied to, but not limited to, a riding mower, a human-powered push mower, or other types of mowers known to those skilled in the art.

Referring to fig. 1 and 2, the trimming device 300 further includes a guard member 310, at least one driving motor 320 and at least one cutting blade 330, wherein the guard member 310 has a grass cutting space 311, a grass outlet 312 and at least one mounting channel 313, the grass outlet 312 communicates with the grass cutting space 311 at a side portion of the guard member 310, the mounting channel 313 communicates with the grass cutting space 311 at an upper portion of the guard member 310, wherein the driving motor 320 is mounted at the upper portion of the guard member 310, and a rotor mechanism of the driving motor 320 extends from the upper portion of the guard member 310 to the grass cutting space 311 through the mounting channel 313, and the cutting blade 330 is drivingly mounted to the rotor mechanism of the guard member 310 to maintain the cutting blade 330 in the grass cutting space 311 of the guard member 310. When the lawnmower 1000 is used to cut grass, the cutter 330 can cut grass in the grass cutting space 311, and cut grass pieces can be discharged out of the grass cutting space 311 through the grass outlet 312. Preferably, the trimming device 300 further comprises at least one roller 340, wherein each roller 340 is rotatably mounted on the front side of the guard member 310 for supporting the guard member 310. The four corners of the protection element 310 are respectively disposed on the height-adjusting device 100 to allow the height-adjusting device 100 to lift the trimming device 300.

Specifically, the height-adjusting device 100 includes a driving unit 10 and an adjusting unit 20, wherein the adjusting unit 20 is drivably connected to the driving unit 10, wherein the driving unit 10 and the adjusting unit 20 are respectively disposed at the body 200, and the trimming device 300 is disposed at the adjusting unit 20. When the driving unit 10 drives the adjusting unit 20, the adjusting unit 20 can lift the trimming device 300 to automatically adjust the height of the trimming device 300 from the ground.

Further, referring to fig. 3 and 4, the adjusting unit 20 includes two front rotating shafts 21, a rear rotating shaft 22, two front mounting pieces 23, two rear mounting pieces 24, two front pivoting arms 25, two rear pivoting arms 26, two front pushing arms 27, two rear pushing arms 28, and two connecting arms 29. The two front mounting pieces 23 are respectively provided to the body main body 210 of the body 200, and each front mounting piece 23 is respectively located at a lower portion of the body main body 210, and the two front rotating shafts 21 are respectively rotatably mounted to the two front mounting pieces 23, so that the front rotating shafts 21 are rotatably held in a lower space of the body 200. Preferably, the two front mounting pieces 23 are symmetrically distributed on the lower portion of the body 210. In a specific example of the lawn mower 1000 of the present invention, the front mount 23 may be mounted to the main body 210 by means of screws or bolts and nuts. In another specific example of the lawn mower 1000 of the present invention, the front mount 23 is welded to the main body 210. In another specific example of the lawn mower 1000 of the present invention, the front mount 23 and the main body 210 are of a one-piece structure.

Accordingly, the two rear mounts 24 are respectively provided at the lower portions of the body main body 210 of the body 200. Preferably, two rear mounting pieces 24 are symmetrically distributed on the lower portion of the body 210. Both ends of the rear hinge 22 are extended to be rotatably mounted to each of the rear mounts 24, respectively, in such a manner that the rear hinge 22 is rotatably held in the lower space of the body 200. The rear rotary shaft 22 is drivably disposed on the driving unit 10, so as to allow the driving unit 10 to drive the rear rotary shaft 22 to rotate in the lower space of the body 200. Specifically, the rear mount 24 may be mounted to the body 210 by means of screws or bolts and nuts fitted to each other, so that the rear mount 24 is provided to the body 200. Optionally, the rear mounting 24 is welded to the fuselage 200, thereby providing the rear mounting 24 to the fuselage 200. Alternatively, the rear mounting 24 and a portion of the fuselage 200 are constructed as a unitary structure, thereby providing the rear mounting 24 to the fuselage 200. In another specific example of the lawn mower 1000 of the present invention, the rear mounting member 24 is welded to the main body 210. In another specific example of the mower 1000 of the present invention, the rear mount 24 and the main body 210 are of a one-piece construction.

It should be noted that, referring to fig. 2 to 4, the two front rotating shafts 21 are independent from each other, so that the structure of the height-adjusting device 100 is simplified, the overall weight of the height-adjusting device 100 is reduced, and the height-adjusting device 100 is advantageously stably held in the lower space of the main body 210.

Referring to fig. 3 and 4, two front rotating shafts 21 are respectively provided at the middle portions of the pivoting front arms 25, and one ends of the pushing front arms 27 and the connecting arms 29 are respectively mounted at both ends of the pivoting front arms 25. Both ends of the rear rotary shaft 22 are respectively mounted to the middle of the rear pivot arm 26, and the other ends of the push rear arm 28 and the connecting arm 29 are respectively mounted to both ends of the rear pivot arm 26. Preferably, a lower end portion of each of the front pushing arms 27 is rotatably mounted to the trimming device 300, and a lower end portion of each of the rear pushing arms 28 is rotatably mounted to the trimming device 300, so that each of the front pushing arms 27 and each of the rear pushing arms 28 can vertically lift the trimming device 300 when each of the front pushing arms 27 and each of the rear pushing arms 28 are driven to rotate.

Specifically, each of the pivoting forearms 25 has a forearm outer end 251 and a forearm inner end 252, wherein the middle portion of each of the pivoting forearms 25 is rotatably mounted at both ends of the front rotating shaft 21, so that each of the pivoting forearms 25 is driven by the front rotating shaft 21 to rotate synchronously. Accordingly, each of the rear pivoting arms 26 has a rear arm outer end 261 and a rear arm inner end 262, wherein the middle portion of each of the rear pivoting arms 26 is rotatably mounted at both ends of the rear rotating shaft 22, so that each of the rear pivoting arms 26 is rotated synchronously by the rear rotating shaft 22. The upper end of each of said pushing forearms 27 is rotatably mounted to said outer forearm end 251 of each of said pivoting forearms 25, and the lower end of each of said pushing forearms 27 is mounted to the front of said guard member 310 of the trimming device 300. Accordingly, a high end portion of each of the rear pushing arms 28 is rotatably mounted to the rear arm outer end 261 of each of the rear pivoting arms 26, and a low end portion of each of the rear pushing arms 28 is mounted to the rear of the guard member 310 of the trimming device 300, to allow each of the front pushing arms 27 and each of the rear pushing arms 28 to lift the trimming device 300. Each link arm 29 has a front end 291 and a rear end 292 corresponding to the front end 291, wherein the front end 291 of each link arm 29 is rotatably mounted to the front arm inner end 252 of each front pivot arm 25, and the rear end 292 of each link arm 29 is rotatably mounted to the rear arm inner end 262 of each rear pivot arm 26.

Preferably, the length of the front pushing arm 27 is greater than that of the rear pushing arm 28, so that each front pushing arm 27 and each rear pushing arm 28 can drive the trimming device 300 to horizontally and vertically lift when each front pushing arm 27 and each rear pushing arm 28 are driven to rotate, that is, the trimming device 300 can be kept horizontal all the time when the trimming device 300 is driven to lift. In a preferred example of the mower 1000 of the present invention, the difference between the length dimension of the push front arm 27 and the length dimension of the push rear arm 28 is in the range of 3mm to 6mm (including 3mm and 6 mm). Preferably, the difference between the length dimensions of the front pushing arm 27 and the rear pushing arm 28 is 4 mm.

It is worth mentioning that the pushing front arm 27 is operatively connected to the pivoting front arm 25, and by changing the relative heights of the pushing front arm 27 and the pivoting front arm 25, the relative positions of the adjusting device 100 and the trimming device 300 can be manually changed, thereby changing the height of the trimming device 300 from the ground and ensuring the balance of the trimming device 300.

Referring to fig. 4, the pushing forearm 27 includes a fitting portion 271 and a movable portion 272 extending downwardly from the fitting portion 271, wherein the fitting portion 271 is operatively connected to the forearm outer end 251 of the pivoting forearm 25, and the movable portion 272 is mounted to the guard member 310 of the trimming device 300. The relative positions of the mounting portion 271 and the pivoting front arm 25 are allowed to vary, thereby enabling the height of the trimming device 300 connected to the movable portion 272 from the ground to be varied by varying the relative positions of the mounting portion 271 and the pivoting front arm 25.

According to a preferred embodiment of the present invention, the adjusting unit 20 further comprises two assembling members 30, the assembling portion 271 of the pushing front arm 27 is mounted on the pivoting front arm 25 by the adjusting element 20. Specifically, the fitting member 30 includes a fitting arm 31 and a mounting arm 32 extending from the fitting arm 31 in a curved manner, and when the fitting arm 31 is fitted to the pivoting front arm 25, a fitting space is formed between the mounting arm 32 and the pivoting front arm 25. The fitting member 30 further includes a holding arm 33, the holding arm 33 is mounted to the pivoting front arm 25 after passing through the holding arm 33 from the mounting arm 32, the holding arm 33 has a mounting through hole 331 penetrating vertically through the holding arm, the fitting portion 271 of the pushing front arm 27 is operatively held in the mounting through hole 331, the fitting portion 271 of the pushing front arm 27 is movable up and down in the mounting through hole 331, and the height of the pushing front arm 27 can be held in an adjusted state. Thereby changing the relative positions of the trimming means 300 and the main body 100 in such a manner that the height of the trimming means 300 from the ground is maintained in an adjusted state.

Preferably, the outer surface of the fitting portion 271 of the pushing front arm 27 is externally threaded, and the fitting portion 271 is fixed to the holding arm 33 after passing through one nut, the mounting through-hole 331 of the holding arm 33, and the other nut in this order. The user can adjust the height of the trimming device 300 from the ground by manually turning the nut and allowing the fitting portion 271 of the pushing forearm 27 to move up and down relative to the pivoting forearm 25. Alternatively, in another specific example of the present invention, the fitting portion 271 of the pushing front arm 27 has a row of adjusting holes, and after the end of the holding arm 33 passes through the adjusting holes having different heights and is fixed to the pivoting front arm 25, the pushing front arm 27 is held at different heights, and the trimming device 300 is held at different heights from the ground. In a specific example of the present invention, the holding arm 33 and the mounting arm 32 are of an integral structure. In another specific example of the present invention, the holding arm 33 is detachably mounted to the mounting arm 32. It should be noted that the manner of varying the relative heights of the pushing front arm 27 and the pivoting front arm 25 is merely an example and should not be construed as limiting the content and scope of the height-adjusting device 100 and the mower 1000 of the present invention.

When the height-adjusting device 100 of the lawn mower 1000 automatically adjusts the height above the ground of the trimming device 300, and if the trimming device 300 has uneven height on both sides, the height above the ground of at least one side of the trimming device 300 can be manually adjusted to balance the trimming device 200 and horizontally trim the lawn.

Preferably, referring to fig. 3 and 4, the movable portion 272 of each pushing forearm 27 extends in a curved manner from the mounting portion 271, which is beneficial to enhance the strength of the pushing forearm 27 and prevent the pushing forearm 27 from breaking when the trimming device 300 is impacted by an external force. For example, but not limited to, the movable portion 272 is implemented in an oval shape, a circular shape, or the like. It should be noted that, in another specific example of the present invention, the movable portion 272 of the pushing front arm 27 may also be implemented to extend straight downward from the mounting portion 271, and the specific implementation of the pushing front arm 27 is not limited.

In this particular embodiment of the invention, the trimming device 300 is movably connected to the movable portion 272 of the pushing forearm 27. Specifically, the movable portion 272 of each pushing forearm 27 has a movable passage 270, so that the movable portion 272 is annular, a part of the structure of the protective element 310 of the trimming device 300 is movably disposed in the movable passage 270, and the trimming device 300 can move up and down relative to the height-adjusting device 100. Referring to fig. 7A and 7B, when the front side of the cutting means 300 is applied with an upward force by an obstacle such as a stone, the cutting means 300 can automatically move upward along the extending direction of the movable passage 270, so that the cutting means 300 passes through the obstacle in an inclined manner, which is advantageous in preventing the obstacle from directly hitting the cutting means 300. After the lawn mower 1000 passes the obstacle, the trimming device 300 of the lawn mower 1000 moves downward along the extending direction of the movable channel 270 and can continue to horizontally trim the lawn. Further, if the size of the obstacle is too large and the guard element 310 of the trimming device 300 abuts against the upper wall of the movable channel 270 of the movable portion 271, the trimming device 300 applies force upward to the pushing front arm 27, so that the pushing front arm 27 moves relative to the pivoting front arm 25, the pivoting front arm 25 and the front rotating shaft 21 fixed to the pivoting front arm 25 rotate, and the front side of the trimming device 300 can be inclined higher than the rear side, thereby preventing the trimming device 300 from being damaged by the obstacle such as stone directly impacting the trimming device 300.

In this particular embodiment of the height adjustment apparatus 100 of the present invention, the pivoting forearm 25 of the height adjustment apparatus 100 has a first forearm extension 253 and a second forearm extension 254, wherein the second forearm extension 254 integrally extends with the first forearm extension 253, and the extension of the first forearm extension 253 and the extension of the second forearm extension 254 have an acute included angle to form a forearm opening 255 between the first forearm extension 253 and the second forearm extension 254. For example, the pivoting front arm 25 is substantially "V" shaped or "V" shaped. The first forearm extension 253 of the pivoting forearm 25 forms the forearm inner end 252, the second forearm extension 254 of the pivoting forearm 25 forms the forearm outer end 251, and the forearm opening 255 of the pivoting forearm 25 faces downward.

The ends of the two front rotating shafts 21 are fixed to the middle portions of the two pivoting forearms 25, respectively, that is, the front rotating shafts 21 are fixed to the connecting positions of the first forearm extension 253 and the second forearm extension 254, and the front rotating shafts 21 and the pivoting forearms 25 fixed to the front rotating shafts 21 rotate synchronously. Preferably, the front rotary shaft 21 has a first key groove, the middle of the pivoting front arm 25 has a front arm through hole and a second key groove communicating with the front arm through hole, wherein the end of the front rotary shaft 21 penetrates and is held in the front arm through hole of the pivoting front arm 25 so that the first key groove and the second key groove correspond to each other, and a flat key is held in the first key groove of the front rotary shaft 21 and the second key groove of the pivoting front arm 25 to fixedly mount the pivoting front arm 25 on the front rotary shaft 21. Alternatively, the middle portion of the pivoting front arm 25 is welded to the end of the front hinge 21 to fixedly mount the middle portion of the pivoting front arm 25 to the front hinge 21. Optionally, the middle of the pivoting front arm 25 is provided with a fitting hole adapted to the cross-sectional size and shape of the front rotating shaft 21, so that the front rotating shaft 21 and the pivoting front arm 25 are fixedly connected in a clearance fit manner. It should be understood by those skilled in the art that the connection manner of the front rotary shaft 21 and the pivoting front arm 25 is not limited, and should not be construed as limiting the content and scope of the height-adjusting device 100 and the mower 1000.

Accordingly, the rear pivot arm 26 has a first rear arm extension 263 and a second rear arm extension 264, wherein the second rear arm extension 264 integrally extends from the first rear arm extension 263, and the extending direction of the first rear arm extension 263 and the extending direction of the second rear arm extension 264 have an acute included angle, so as to form a rear arm opening 265 between the first rear arm extension 263 and the second rear arm extension 264. For example, the shape of the rear pivoting arm 26 is substantially "V" shaped or "√" shaped. The first rear arm extension 263 of the rear pivot arm 26 forms the rear arm inner end 262, the second rear arm extension 264 of the rear pivot arm 26 forms the rear arm outer end 261, and the rear arm opening 265 of the rear pivot arm 26 faces upward.

Both ends of the rear hinge 22 are fixed to the middle portions of the two rear pivot arms 26, respectively, that is, the rear hinge 22 is fixed to the connecting position of the first rear arm extension 263 and the second rear arm extension 264, and the rear hinge 22 and the rear pivot arms 26 fixed to the rear hinge 22 rotate synchronously. Preferably, the rear rotary shaft 22 has a third key groove, the rear pivoting arm 26 has a rear arm through hole and a fourth key groove communicating with the rear arm through hole in the middle thereof, wherein the end of the rear rotary shaft 22 penetrates and is held in the rear arm through hole of the rear pivoting arm 26 such that the third key groove and the fourth key groove correspond to each other, and a flat key is held in the third key groove of the rear rotary shaft 22 and the fourth key groove of the rear pivoting arm 26 to fixedly mount the rear pivoting arm 26 to the rear rotary shaft 22. Optionally, a middle portion of the rear pivoting arm 26 is welded to an end of the rear spindle 22 to fixedly mount the middle portion of the rear pivoting arm 26 to the rear spindle 22. Optionally, the middle of the rear pivoting arm 26 is provided with a fitting hole adapted to the cross-sectional size and shape of the rear rotating shaft 22, so that the rear rotating shaft 22 and the rear pivoting arm 26 are fixedly connected in a clearance fit manner.

Referring to fig. 3 and 4, the heights of the two front spindles 21 spaced apart from each other are the same, and the heights of the front spindle 21 and the rear spindle 22 are the same, the middle portion of the pivoting front arm 25 is fixedly mounted to the end of the front spindle 21 with the front arm opening 255 of the pivoting front arm 25 facing downward, and the middle portion of the pivoting rear arm 26 is fixedly mounted to the end of the rear spindle 22 with the rear arm opening 265 of the pivoting rear arm 26 facing upward, such that the height of the front arm inner end 252 of the pivoting front arm 25 is lower than the height of the rear arm inner end 262 of the pivoting rear arm 26, and the height of the front arm outer end 251 of the pivoting front arm 25 is the same as the height of the rear arm outer end 261 of the pivoting rear arm 26, and thus, the pushing front arm 27 rotatably mounted to the front arm outer end 251 of the pivoting front arm 25 and the pushing front arm 251 rotatably mounted to the pivoting rear arm outer end 251 are the same The push rear arm 28 of the rear arm outer end 261 of the arm 26 causes the trimming means 300 mounted to the lower end of the push front arm 27 and the lower end of the push rear arm 28 to be horizontally held to the lower space of the body 200. It will be appreciated that the connecting arm 29 is inclined. Preferably, the connecting arm 29 is in a shape of an upward convex arc, so that the driving unit 10 can easily drive the rear rotating shaft 22 to simultaneously drive the front rotating shaft 21 to rotate via the connecting arm 29, thereby driving the trimming device 300 to vertically lift.

With continued reference to fig. 3 and 4, the front mounting members 23 have a first through hole 230, and both ends of the front axle 21 extend through the first through hole 230 of each front mounting member 23 to the outer side of each front mounting member 23, respectively, to allow the middle of the pivoting front arm 25 to be fixedly mounted to the end of the front axle 21 at the outer side of the front mounting member 23. Preferably, an end of the front rotary shaft 21 is rotatably mounted to the first through hole 230 of the front mounting member 23 through a bearing.

Specifically, the anterior mounting member 23 has a first anterior plate 231 and a second anterior clip 232, wherein the first anterior plate 231 and the second anterior clip 232 have a notch, respectively, and the first anterior plate 231 and the second anterior clip 232 are mounted to each other in such a manner that the notch of the first anterior plate 231 and the notch of the second anterior clip 232 correspond to each other, so that the first through hole 230 is formed between the first anterior plate 231 and the second anterior clip 232.

Accordingly, the rear mounting member 24 has a second through hole 240, and both ends of the rear rotating shaft 22 extend to the outside of each rear mounting member 24 through the second through hole 240 of each rear mounting member 24, respectively, to allow the middle portion of the pivoting rear arm 26 to be fixedly mounted to the end portion of the rear rotating shaft 22 at the outside of the rear mounting member 24. Preferably, an end of the rear rotary shaft 22 is rotatably mounted to the second through hole 240 of the rear mounting member 24 through a bearing.

Specifically, the rear mounting member 24 has a first rear clamping member 241 and a second rear clamping member 242, wherein the first rear clamping member 241 and the second rear clamping member 242 have a notch, respectively, and the first rear clamping member 241 and the second rear clamping member 242 are mounted to each other in such a manner that the notch of the first rear clamping member 241 and the notch of the second rear clamping member 242 correspond to each other, so that the second through hole 240 is formed between the first rear clamping member 241 and the second rear clamping member 242.

Preferably, referring to fig. 3 and 4, the driving unit 10 is implemented as an electric driving device, that is, the driving unit 10 converts electric energy into mechanical energy to drive the adjusting unit 20 for operation. Specifically, the driving unit 10 includes an electric push rod 11 and a driving swing arm 12, wherein the electric push rod 11 has a mounting end 111 and a telescopic end 112 corresponding to the mounting end 111, the mounting end 111 of the electric push rod 11 is mounted to the body 200, one end of the driving swing arm 12 is rotatably mounted to the telescopic end 112 of the electric push rod 11, and the other end of the driving swing arm 12 is fixedly disposed on the rear rotating shaft 22. When the telescopic end 112 of the electric push rod 11 is telescopic, the electric push rod 11 can drive the rear rotating shaft 22 to synchronously rotate through the driving swing arm 12.

Referring to fig. 5A to 6B, a user may control the telescopic end 112 of the electric putter 11 to extend or retract, for example, the user may control the telescopic end 112 of the electric putter 11 to extend or retract by, but not limited to, a control button provided at the body 200. When the telescopic end 112 of the electric putter 11 is shifted from a retracted state to an extended state, the electric putter 11 rotates the rear rotary shaft 22 through the driving swing arm 12, the rear rotary shaft 22 rotates each of the rear pivoting arms 26 synchronously to lower the height of the rear arm outer end 261 of each of the rear pivoting arms 26, and at the same time, the rear arm inner end 262 of each of the rear pivoting arms 26 rotates each of the front pivoting arms 25 through each of the connecting arms 29 to lower the height of the front arm outer end 251 of each of the front pivoting arms 25, because the height of the front arm outer end 251 of each of the front pivoting arms 25 and the height of the rear arm outer end 261 of each of the rear pivoting arms 26 are synchronously lowered, so that the ground clearance of the trimming device 300 is adjusted. Accordingly, when the telescopic end 112 of the electric putter 11 is shifted from the extended state to the retracted state, the electric putter 11 rotates the rear rotating shaft 22 in the opposite direction through the driving swing arm 12, the rear rotating shaft 22 rotates each of the rear pivoting arms 26 synchronously to raise the height of the rear arm outer end 261 of each of the rear pivoting arms 26, and at the same time, the rear arm inner end 262 of each of the rear pivoting arms 26 rotates each of the front pivoting arms 25 through each of the connecting arms 29 to raise the height of the front arm inner end 252 of each of the front pivoting arms 25, because the height of the front arm outer end 251 of each of the front pivoting arms 25 and the height of the rear arm outer end 261 of each of the rear pivoting arms 26 are raised synchronously, the ground clearance of the trimming device 300 is adjusted.

It will be appreciated by persons skilled in the art that the above embodiments are only examples, wherein features of different embodiments may be combined with each other to obtain embodiments which are easily imaginable in accordance with the disclosure of the invention, but which are not explicitly indicated in the drawings.

It will be understood by those skilled in the art that the embodiments of the present invention as described above and shown in the drawings are given by way of example only and are not limiting of the present invention. The objects of the present invention have been fully and effectively accomplished. The functional and structural principles of the present invention have been shown and described in the embodiments without departing from the principles, embodiments of the present invention may have any deformation or modification.

Claims

1. An apparatus for height adjustment, comprising:

a driving unit; and

2. The height adjustment apparatus of claim 1, wherein the pushing forearm comprises a mounting portion and a movable portion extending downwardly from the mounting portion, wherein the mounting portion is operably mounted to the pivoting forearm and the relative positions of the mounting portion and the pivoting forearm are permitted to be adjusted.

3. The heightening device according to claim 2, wherein the movable portion extends downward from the fitting portion in a curved shape.

4. The height adjusting device according to claim 3, wherein the movable portion is ring-shaped.

5. The height adjustment apparatus of claim 4, wherein the adjustment unit further has two fittings, wherein the fittings include a mounting arm integrally extending from the abutment arm, a mounting arm, and a retaining arm having two ends connected to the mounting arm and the pivoting front arm, respectively, the pivoting front arm being operably mounted to the retaining arm.

6. The height adjusting device according to claim 5, wherein the holding arm has a fitting through-hole, and the pivot front arm is held to the pivot through-hole movably up and down.

7. The height adjustment device of any one of claims 1 to 6, wherein a length dimension of the push front arm is greater than a length dimension of the push rear arm.

8. The height adjustment device of claim 7, wherein a difference between a length dimension of the push front arm and a length dimension of the push rear arm ranges from 3mm to 6 mm.

9. A lawnmower with a height adjustment device, comprising:

a body;

a trimming device; and

10. The mower with height adjustment device of claim 9 wherein said pushing forearm includes a mounting portion and a movable portion extending downwardly from said mounting portion, wherein said mounting portion is operably mounted to said pivoting forearm and the relative positions of said mounting portion and said pivoting forearm are permitted to be adjusted.

11. The mower with an upraised device of claim 10, wherein the movable portion extends downward curvedly from the mounting portion.

12. The mower with an upraised device of claim 11 wherein the movable portion is annular.

13. The mower with height adjustment device of claim 12 wherein said adjustment unit further has two fittings, wherein said fittings include a mounting arm integrally extending from said attachment arm, a retaining arm having opposite ends connected to said mounting arm and said pivoting front arm, respectively, said pivoting front arm being operably mounted to said retaining arm.

14. The mower with height adjustment device as claimed in claim 13, wherein said holding arm has a fitting through hole, and said pivoting front arm is held in said pivoting through hole movably up and down.

15. The mower with height adjustment device of any one of claims 9 to 14 wherein the length dimension of the front push arm is greater than the length dimension of the rear push arm.

16. The mower with height adjustment device of claim 15 wherein the difference between the length dimension of the front push arm and the length dimension of the rear push arm ranges from 3mm to 6 mm.