WO2021093284A1 - Height adjustment device and mower with same - Google Patents

Abstract

Provided are a height adjustment device (100) and a mower (1000) with the same, wherein the mower with the height adjustment device comprises a body (200), a trimming device (300) and a height adjustment device, wherein the height adjustment device comprises a driving unit (10) and an adjusting unit (20), wherein the driving unit is arranged on the body, the adjusting unit is arranged on the machine body, and the adjusting unit is drivably connected to the driving unit, wherein the trimming device is arranged on the adjusting unit so that the height adjusting device can adjustably maintain the trimming device in the lower space of the body, and the ground height of the trimming device can be changed by changing the relative position of the trimming device and the body.

Description

Height adjustment device and lawn mower with height adjustment device Technical field

The invention relates to a lawn mower, in particular to a height adjustment device and a lawn mower with the height adjustment device.

Background technique

With the improvement of people's living standards, people's awareness of greening has gradually increased, and the requirements for the surrounding environment have become higher and higher. In recent years, the coverage rate of green lawns and other vegetation has become higher and higher, and consequently, the workload of trimming and maintaining various vegetation has also become huge. Operators need to spend a lot of time and energy to manage the lawn and vegetation. The emergence of lawn mowers has replaced manual mowing methods. By mechanically mowing lawns and vegetation, work efficiency has been greatly improved, and labor intensity and labor costs have been reduced. Therefore, lawn mowers are widely used in people's daily life, agricultural production and gardening operations. In particular, riding lawn mowers can not only efficiently repair vegetation, but also improve the working environment and comfort of operators.

Generally, due to the different types of vegetation, the growth conditions are not nearly the same. The height of the vegetation after being repaired by the lawn mower needs to be adjusted according to the actual situation. Gradually, lawn mowers that allow adjustment of the height of the mowing structure appeared on the market. Specifically, an existing lawn mower includes a body, a mowing mechanism, and a height adjustment mechanism connected to the body and the mowing mechanism, and the height adjustment mechanism can be changed by operating the height adjustment mechanism. The relative position of the mowing mechanism and the fuselage is further adjusted to adjust the height between the mowing mechanism and the ground, so that the vegetation repaired by the lawn mower can be retained at different heights. However, there are still many problems in the actual use of the existing lawn mower.

First, the height adjustment mechanism of the existing lawn mower is a manual height adjustment mechanism, which is complicated to operate and affects the cutting efficiency and progress of the lawn mower. Specifically, before the ground clearance of the mowing mechanism needs to be adjusted, the operator needs to stop the driving and operation of the lawn mower, and then manually release the mowing mechanism that is held in a fixed position. Limit, so that the height of the mowing mechanism is allowed to be adjusted, and the height adjustment mechanism is further operated. When the ground clearance of the mowing mechanism meets the requirements, the height adjustment mechanism will cut the mowing again The mechanism is restricted to this fixed position before the lawn mower can be started again. The manually operated height adjustment structure is not only complicated in structure, but also reduces the working efficiency of the lawn mower. In addition, the structure of the height adjustment mechanism is complicated, the mowing mechanism is provided with a sharp blade, and manual operation poses a greater safety hazard.

Secondly, the ground clearance of the mowing mechanism will only change after manual adjustment, that is, during the running of the lawn mower, the ground clearance of the mowing mechanism of the lawn mower is always maintained No change, if the operator does not notice the obstacle hidden in the vegetation, and the size is greater than the ground height of the mowing mechanism, such as stones, etc., in the process of using the lawn mower. When the mechanism is cutting vegetation, the stone will directly hit the high-speed rotating cutter head of the mowing mechanism, causing damage to the mowing mechanism. Therefore, the existing lawn mower has a low degree of flexibility and automation, and requires a high level of operation of the operator, and the service life of the cutter head of the lawn mower is relatively low, resulting in the existing lawn mower The maintenance cost of lawn mowers is relatively high.

Summary of the invention

An object of the present invention is to provide a height adjustment device and a lawn mower with a height adjustment device, wherein the height adjustment device can be applied to the lawn mower, and the height adjustment device can adjust the cutting The height above the ground of a trimming device of the lawn mower, so that the height of the vegetation trimmed by the lawn mower is allowed to be controlled and can meet the needs of users, which improves the applicability and practicability of the lawn mower.

Another object of the present invention is to provide a height adjustment device and a lawn mower with a height adjustment device, wherein the height adjustment device can automatically adjust the trimming device of the lawn mower and the lawn mower The relative position of a fuselage helps prevent the trimming device from being hit by obstacles and damage in time, thereby improving the degree of automation and flexibility of the lawn mower.

Another object of the present invention is to provide a height-adjusting device and a lawn mower with a height-adjusting device, wherein the height-adjusting device can adjust the height of the trimming device from the ground while the lawn mower is running, Thus, the working efficiency of the lawn mower is improved.

Another object of the present invention is to provide a height adjustment device and a lawn mower with a height adjustment device, wherein the height adjustment device allows the trimming device to automatically change the distance when it touches an obstacle hidden in the vegetation. The ground height can avoid obstacles in time and reduce the impact of obstacles, thereby helping to increase the service life of the trimming device and reduce the maintenance cost of the lawn mower.

Another object of the present invention is to provide a height-adjusting device and a lawn mower with a height-adjusting device, wherein the height-adjusting device allows manual adjustment, and thus can manually adjust the ground clearance of the trimming device, which is beneficial to further It is ensured that the adjusted pruning device is kept level, thereby ensuring the balance of the pruning device, and at the same time, it is beneficial to the smoothness of the vegetation after the trimming.

Another object of the present invention is to provide a height adjustment device and a lawn mower with a height adjustment device, wherein by simplifying the structure of the height adjustment device, the operation of the height adjustment device is simple, and the height adjustment is reduced. The overall weight of the device.

Another object of the present invention is to provide a height adjustment device and a lawn mower with a height adjustment device, wherein the height adjustment device includes a driving unit and an adjustment unit, and the adjustment unit is drivably connected to the A drive unit, the trimming device and the body are respectively connected to the adjustment unit, and the drive unit automatically drives the adjustment unit to change the trimming device and the machine through the adjustment unit The relative position of the body, and then automatically adjust the height of the trimming device from the ground.

Another object of the present invention is to provide a height adjustment device and a lawn mower with a height adjustment device, wherein the height of at least one pushing forearm of the adjustment unit is allowed to be adjusted, and then by changing at least one pushing of the adjustment unit The height of the forearm can change the ground clearance of the trimming device connected with the pushing forearm.

According to one aspect of the present invention, the present invention further provides a height adjustment device, which includes:

A drive unit; and

An adjustment unit, wherein the adjustment unit includes two front shafts, a rear shaft, two front mounting parts, two rear mounting parts, two pivoting forearms, two pivoting rear arms, two pushing forearms, and two pushing rear An arm and two connecting arms, wherein the two front rotation shafts are independent of each other, the two front mounting parts are respectively mounted on the two front rotation shafts, and the middle of the two pivoting forearms are respectively provided On the two front shafts, both ends of the rear shaft are rotatably mounted on the two rear mounting parts, and the rear shaft is driveably connected to the drive unit, Wherein the middle of each pivoting rear arm is respectively arranged at both ends of the rear shaft, wherein the two pushing forearms are respectively rotatably mounted on the outer ends of the forearms of the two pivoting forearms, Two of the pushing rear arms are respectively rotatably installed on the outer ends of the rear arms of the two pivoting rear arms, and both ends of each of the connecting arms are respectively rotatably installed on the pivoting The inner end of the forearm of the forearm and the inner end of the rear arm of the pivoted rear arm.

According to an embodiment of the present invention, the pushing forearm includes an assembling part and a movable part extending downward from the assembling part, wherein the assembling part is operably installed on the pivoting forearm, and the The relative position of the fitting part and the pivoting forearm is allowed to be adjusted.

According to an embodiment of the present invention, the movable part extends downward from the assembling part in a curved manner.

According to an embodiment of the present invention, the movable part has a ring shape.

According to an embodiment of the present invention, the adjustment unit further has two fittings, wherein the fittings include a fitting arm, a mounting arm, and a holding arm, wherein the fitting arm is integrally extended to the fitting An arm, both ends of the holding arm are respectively connected to the mounting arm and the pivoting forearm, and the pivoting forearm is operably mounted to the holding arm.

According to an embodiment of the present invention, the holding arm has an assembling through hole, and the pivoting forearm is held in the pivoting through hole to be movable 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 back arm.

According to an embodiment of the present invention, the difference between the length of the pushing forearm and the length of the pushing back arm ranges from 3 mm to 6 mm.

According to one aspect of the present invention, the present invention further provides a lawn mower with a height adjustment device, which includes:

A fuselage

A trimming device; and

A height adjustment device, wherein the height adjustment device includes a drive unit and an adjustment unit, wherein the adjustment unit includes two front shafts, a rear shaft, two front mounting parts, two rear mounting parts, and two pivots Turn the forearm, the two pivoting rear arms, the two pushing forearms, the two pushing rear arms, and the two connecting arms, wherein the two front rotating shafts are independent of each other, and the two front mounting parts are installed on the two fronts respectively. The middle part of the two pivoting forearms are respectively provided on the two front shafts, and both ends of the rear shaft are rotatably mounted on the two rear mounting parts, and The rear shaft is drivably connected to the driving unit, wherein the middle of each pivoting rear arm is respectively arranged at both ends of the rear shaft, and the two pushing forearms are respectively driven Are rotatably mounted on the outer ends of the forearms of the two pivoting forearms, wherein the two pushing rear arms are respectively rotatably mounted on the outer ends of the rear arms of the two pivoting rear arms, wherein each of the The two ends of the connecting arm are respectively rotatably mounted on the inner end of the forearm of the pivoting forearm and the inner end of the rear arm of the pivoting rear arm, wherein the two front mounting parts are respectively provided on the machine The two rear mounting parts are respectively provided on the body, the low ends of the two pushing forearms are respectively provided on the trimming device, and the low ends of the two pushing rear arms are respectively provided It is installed in the trimming device.

Description of the 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 schematic diagram of the lawn mower according to the above-mentioned preferred embodiment of the present invention.

Fig. 3 is a three-dimensional schematic diagram of a height adjustment device of the lawn mower according to the above-mentioned preferred embodiment of the present invention.

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

Fig. 5A is a schematic side view of a state of the lawn mower according to the above-mentioned preferred embodiment of the present invention.

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

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

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

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

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

Detailed ways

The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments in the following description are only examples, and those skilled in the art can think of other obvious variations. The basic principles of the present invention defined in the following description can be applied to other embodiments, modifications, improvements, equivalents, and other technical solutions that do not deviate from the spirit and scope of the present invention.

Those skilled in the art should understand that, in the disclosure of the present invention, the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", " The orientation or positional relationship indicated by "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present invention and The description is simplified, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore the above-mentioned terms should not be construed as limiting the present invention.

It can be understood that the term "a" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element may be one, and in another embodiment, the number of the element The number can be more than one, and the term "one" cannot be understood as a restriction on the number.

Referring to Figures 1 to 7B of the specification of the present invention, a height-adjusting device 100 according to a preferred embodiment of the present invention is disclosed and explained in the following description, wherein the height-adjusting device 100 is applied to a The lawn mower 1000 is used to change the ground clearance of a trimming device 300 of the lawn mower 1000, so that the lawn mower 1000 is not only suitable for trimming vegetation of different growth and terrain, but also can be timely in the process of trimming vegetation. Avoid obstacles to prevent the trimming device 300 from being damaged. Therefore, the practicability and flexibility of the lawn mower 1000 are improved by the height adjustment device 100.

Further, the height adjustment 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 trimming device. The ground clearance of 300 improves the degree of automation of the lawn mower 100. Moreover, the height adjustment device 100 is also allowed to be manually adjusted, and the relationship between the trim device 300 and the body 200 can be indirectly changed by changing the relative position of the height adjustment device 100 and the fuselage 200. The relative position of the trimming device 300 can be changed from the ground.

Specifically, the lawn mower 1000 with the height adjustment device 100 includes the height adjustment device 100, the fuselage 200, and the trimming device 300, and the height adjustment device 100 is disposed on the In the lower space of the fuselage 200, the trimming device 300 is adjustably disposed in the height adjustment device 100, so as to adjustably maintain the trimming device 300 in the lower space of the fuselage 200 by the height adjustment device 100. According to actual needs, the height adjustment device 100 can automatically adjust the relative position of the trim device 300 and the fuselage 200 to adjust the height of the trim device 300 from the ground, and the height adjustment device 100 enables the The ground clearance of the trimming device 300 is maintained in the adjusted state.

1, the fuselage 200 includes a fuselage main body 210, a power device 220, and a set of wheels 230. The power device 220 is disposed on the fuselage main body 210, and each wheel 230 is separately disposed. At the front and rear of both sides of the fuselage body 210, and each of the wheels 230 can be directly or indirectly connected to the power unit 220, so that when the power unit 220 provides power, Each of the wheels 230 can drive the fuselage 200 to walk. It is worth mentioning that the type of the fuselage 200 is not limited, and the specific implementation of the fuselage 200 is only an example. The height adjustment device 100 can be applied to but not limited to riding lawn mowers, manpower Push lawn mowers or other types of lawn mowers known to those skilled in the art.

1 and 2, the trimming device 300 further includes a protective element 310, at least one drive motor 320, and at least one cutting knife 330, wherein the protective element 310 has a mowing space 311, a grass outlet 312 And at least one installation channel 313, the grass outlet 312 is connected to the mowing space 311 on the side of the protection element 310, and the installation channel 313 is connected to the mowing space 311 on the upper part of the protection element 310 , Wherein the driving motor 320 is installed on the upper part of the protection element 310, and the rotor mechanism of the driving motor 320 extends from the upper part of the protection element 310 to the mowing space 311 through the installation channel 313, The cutting blade 330 is drivably installed on the rotor mechanism of the protection element 310 to maintain the cutting blade 330 in the mowing space 311 of the protection element 310. When the lawn mower 1000 is used for mowing operations, the cutter 330 can trim the lawn located in the mowing space 311, and the trimmed grass clippings can be discharged through the grass outlet 312 The mowing space 311. Preferably, the trimming device 300 further includes at least one roller 340, wherein each of the rollers 340 is rotatably installed on the front side of the protective element 310 to support the protective element 310. The four corners of the protective element 310 are respectively provided with the height-adjusting device 100 to allow the height-adjusting device 100 to drive the trimming device 300 up and down.

Specifically, the height adjustment device 100 includes a drive unit 10 and an adjustment unit 20, wherein the adjustment unit 20 is drivably connected to the drive unit 10, wherein the drive unit 10 and the adjustment unit 20 The trimming device 300 is respectively installed in the body 200, and the trimming device 300 is installed in the adjusting unit 20. When the driving unit 10 drives the adjusting unit 20, the adjusting unit 20 can drive the trimming device 300 to lift and automatically adjust the height of the trimming device 300 from the ground.

Further, referring to FIGS. 3 and 4, the adjustment unit 20 includes two front shafts 21, a rear shaft 22, two front mounting parts 23, two rear mounting parts 24, two pivoting forearms 25, and two pivots. The rear arm 26 is rotated, the forearm 27 is pushed twice, the rear arm 28 is pushed twice, and the two connecting arms 29 are pushed. The two front mounting parts 23 are respectively provided on the body main body 210 of the body 200, and each of the front mounting parts 23 are respectively located at the lower part of the body main body 210, and the two The front rotation shaft 21 is rotatably mounted to the two front mounting parts 23 respectively, so that the front rotation shaft 21 is rotatably held in the lower space of the body 200. Preferably, the two front mounting parts 23 are symmetrically distributed on the lower part of the fuselage main body 210. In a specific example of the lawn mower 1000 of the present invention, the front mounting member 23 may be mounted to the main body 210 by means of screws or bolts and nuts in cooperation with each other. In another specific example of the lawn mower 1000 of the present invention, the front mounting member 23 is welded to the main body 210 of the fuselage. In another specific example of the lawn mower 1000 of the present invention, the front mounting member 23 and the main body 210 are an integral structure.

Correspondingly, the two rear mounting parts 24 are respectively arranged at the lower part of the main body 210 of the main body 200. Preferably, the two rear mounting members 24 are symmetrically distributed on the lower part of the main body 210 of the fuselage. Both ends of the rear shaft 22 respectively extend to be rotatably mounted on each of the rear mounting members 24, in such a way that the rear shaft 22 is rotatably held on the body 200 The lower space. The rear shaft 22 is drivably disposed on the driving unit 10 to allow the driving unit 10 to drive the rear shaft 22 to rotate in the lower space of the body 200. Specifically, the rear mounting member 24 may be mounted on the main body 210 of the fuselage body 210 by means of screws or bolts and nuts that cooperate with each other, so that the rear mounting member 24 is disposed on the fuselage 200. Optionally, the rear mounting member 24 is welded to the fuselage 200 so as to install the rear mounting member 24 on the fuselage 200. Optionally, the rear mounting member 24 and a part of the mechanism of the fuselage 200 are an integral structure, so that the rear mounting member 24 is disposed on 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 of the fuselage. In another specific example of the lawn mower 1000 of the present invention, the rear mounting member 24 and the main body 210 are an integral structure.

It is worth mentioning that, referring to FIGS. 2 to 4, the two front shafts 21 are independent of each other, which simplifies the structure of the height adjustment device 100, reduces the overall weight of the height adjustment device 100, and thereby facilitates The height adjustment device 100 is stably held in the lower space of the main body 210.

3 and 4, the two front shafts 21 are respectively arranged in the middle of the pivot forearm 25, and one end of the pushing forearm 27 and the connecting arm 29 are respectively installed on the pivot forearm 25 ends. Both ends of the rear shaft 22 are respectively installed in the middle of the pivot rear arm 26, and the other ends of the pushing rear arm 28 and the connecting arm 29 are respectively installed on the pivot rear arm 26. Both ends. Preferably, the low end of each pushing forearm 27 is rotatably installed on the trimming device 300, and the low end of each pushing rear arm 28 is rotatably installed on the trimming device 300, respectively, so that When each of the pushing forearms 27 and each of the pushing rear arms 28 are driven to rotate, each of the pushing forearms 27 and each of the pushing rear arms 28 can drive the trimming device 300 to rise and fall vertically.

Specifically, each of the pivoting forearms 25 has an outer forearm 251 and an inner end of the forearm 252, wherein the middle of each of the pivoting forearms 25 is rotatably mounted on the front shaft 21, respectively. Each of the pivoting forearms 25 is driven to rotate synchronously by the front rotating shaft 21. Correspondingly, each pivoting rear arm 26 has a rear arm outer end 261 and a rear arm inner end 262 respectively, wherein the middle portion of each pivoting rear arm 26 is respectively rotatably mounted on the rear arm. The two ends of the pivot shaft 22 are used to drive each of the pivoting rear arms 26 to rotate synchronously through the rear pivot shaft 22. The high end of each pushing forearm 27 is respectively rotatably mounted on the outer end 251 of each of the pivoting forearms 25, and the low end of each pushing forearm 27 is respectively mounted on the trimming The front part of the protective element 310 of the device 300. Correspondingly, the high end of each pushing rear arm 28 is respectively rotatably mounted on the rear arm outer end 261 of each pivoting rear arm 26, and the lower end of each pushing rear arm 28 The ends are respectively installed at the rear of the protective element 310 of the trimming device 300 to allow each of the pushing forearms 27 and each of the pushing rear arms 28 to drive the trimming device 300 up and down. Each connecting 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 connecting arm 29 is rotatably mounted to each The inner end 252 of the forearm of the pivoting forearm 25 and the rear end 292 of each of the connecting arms 29 are respectively rotatably mounted in the rear arm of each of the pivoting rear arms 26端262.

Preferably, the length of the pushing forearm 27 is greater than the length of the pushing rear arm 28, so that when each of the pushing forearms 27 and each of the pushing rear arms 28 are driven to rotate, each The pushing forearm 27 and each pushing rear arm 28 can drive the trimming device 300 to move up and down horizontally, that is, the trimming device 300 can always be kept horizontal when the trimming device 300 is driven to rise and fall. In a preferred example of the lawn mower 1000 of the present invention, the difference between the length of the pushing front arm 27 and the length of the pushing rear arm 28 ranges from 3 mm to 6 mm (including 3 mm and 6 mm). Preferably, the difference between the length of the pushing forearm 27 and the pushing back arm 28 is 4 mm.

It is worth mentioning that the pushing forearm 27 is operatively connected to the pivoting forearm 25. By changing the relative height of the pushing forearm 27 and the pivoting forearm 25, the adjustment device can be manually changed. The relative position of 100 and the trimming device 300 further changes the ground clearance of the trimming device 300 and guarantees the balance of the trimming device 300.

4, the pushing forearm 27 includes an assembling portion 271 and a movable portion 272 extending downward from the assembling portion 271, wherein the assembling portion 271 is operatively connected to the pivoting forearm 25. With respect to the outer end 251 of the forearm, the movable portion 272 is installed on the protective element 310 of the trimming device 300. The relative position of the assembling part 271 and the pivoting forearm 25 is allowed to be changed, and by changing the relative position of the assembling part 271 and the pivoting forearm 25, all the positions connected to the movable part 272 can be changed. The ground clearance of the trimming device 300 is described.

According to a preferred embodiment of the present invention, the adjusting unit 20 further includes two assembly parts 30, and the assembly portion 271 of the pushing forearm 27 is mounted on the pivoting forearm 25 by the adjusting element 20. Specifically, the assembling part 30 includes a fitting arm 31 and a mounting arm 32 bent outwardly from the fitting arm 31. When the fitting arm 31 is fitted to the pivoting forearm 25 , An assembly space is formed between the mounting arm 32 and the pivoting forearm 25. The assembly part 30 further includes a holding arm 33, the holding arm 33 is mounted on the pivoting forearm 25 after the mounting arm 32 passes through the holding arm 33, and the holding arm 33 has a vertical penetrating through the holding arm 33. A mounting through hole 331 of the holding arm, the assembling portion 271 of the pushing forearm 27 is operably held in the mounting through hole 331, and the assembling portion 271 of the pushing forearm 27 can be installed in the mounting through hole 331. The hole 331 moves up and down, and the height of the pushing forearm 27 can be maintained in an adjusted state. In this way, the relative position of the trimming device 300 and the fuselage 100 is changed, and the ground clearance of the trimming device 300 is maintained in an adjusted state.

Preferably, the outer surface of the assembling part 271 of the pushing forearm 27 is provided with external threads, and the assembling part 271 sequentially passes through a nut, the mounting through hole 331 of the holding arm 33, and another nut. It is then fixed to the holding arm 33. The user can manually screw the nut, and enable the assembling part 271 of the pushing forearm 27 to move up and down relative to the pivoting forearm 25, thereby adjusting the height of the trimming device 300 from the ground. Optionally, in another specific example of the present invention, the assembly portion 271 of the pushing forearm 27 has a row of adjustment holes, when the end of the holding arm 33 passes through the adjustment holes with different heights, and After being fixed to the pivoting forearm 25, the pushing forearm 27 is maintained at different heights, and the trimming device 300 is maintained at different heights from the ground. In a specific example of the present invention, the holding arm 33 and the mounting arm 32 are an integral structure. In another specific example of the present invention, the holding arm 33 is detachably mounted on the mounting arm 32. It is worth mentioning that the method of changing the relative height of the pushing forearm 27 and the pivoting forearm 25 is only an example, and cannot be considered as an influence on the content and scope of the height adjustment device 100 and the lawn mower 1000 of the present invention. limit.

After the height adjustment device 100 of the lawn mower 1000 automatically adjusts the ground clearance of the trimming device 300, if the trimming device 300 has unevenness on both sides, it can be adjusted manually In this way, the ground clearance of at least one side of the trimming device 300 is changed, so that the trimming device 200 maintains a balance and can trim the lawn horizontally.

Preferably, referring to FIG. 3 and FIG. 4, the movable portion 272 of each pushing forearm 27 is curved to extend to the assembling portion 271, which is beneficial to enhance the strength of the pushing forearm 27 and avoid the trimming device When 300 is hit by an external force, the pushing forearm 27 is broken. For example, but not limited to, the movable portion 272 is implemented in an oval shape or a circular shape. It is worth noting that, in another specific example of the present invention, the movable portion 272 of the pushing forearm 27 can also be implemented to extend straight downward from the assembling portion 271. The implementation is not limited.

In this specific embodiment of the present invention, the trimming device 300 is movably connected to the movable part 272 of the pushing forearm 27. Specifically, the movable portion 272 of each pushing forearm 27 has a movable channel 270, so that the movable portion 272 has a ring shape, and a part of the structure of the protective element 310 of the trimming device 300 is movably Set in the movable channel 270, the trimming device 300 can move up and down relative to the height adjustment device 100. 7A and 7B, when an upward force is applied to the front side of the trimming device 300 by obstacles such as rocks, the trimming device 300 can automatically move upward along the extending direction of the movable channel 270, To make the trimming device 300 pass through obstacles in a tilted manner, it is beneficial to prevent the obstacle from directly hitting the trimming device 300. After the lawn mower 1000 passes the obstacle, the trimming device 300 of the lawn mower 1000 moves downward along the extension direction of the movable channel 270, and can continue to mow the lawn horizontally. Further, if the size of the obstacle is too large and the protective element 310 of the trimming device 300 abuts the upper wall of the movable channel 270 of the movable portion 271, the trimming device 300 will force upward The pushing forearm 27 makes the pushing forearm 27 move relative to the pivoting forearm 25, and the pivoting forearm 25 and the front shaft 21 fixed to the pivoting forearm 25 rotate, thereby As a result, the front side of the trimming device 300 can be inclined higher than the rear side, which can prevent obstacles such as stones from directly impacting the trimming device 300 and damaging the trimming device 300.

In this specific embodiment of the height adjustment device 100 of the present invention, the pivoting forearm 25 of the height adjustment device 100 has a first forearm extension 253 and a second forearm extension 254, wherein The second forearm extension 254 extends integrally with the first forearm extension 253, and the extension direction of the first forearm extension 253 and the extension direction of the second forearm extension 254 have an acute angle to A forearm opening 255 is formed between the first forearm extension 253 and the second forearm extension 254. For example, the shape of the pivoting forearm 25 is approximately a "V" shape or a "√" shape. 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 pivot The forearm opening 255 of the turned forearm 25 faces downward.

The ends of the two front shafts 21 are respectively fixed to the middle of the two pivoting forearms 25, that is, the front shaft 21 is fixed to the first forearm extension 253 and the second forearm The connecting position of the extension part 254, and the front shaft 21 and the pivoting forearm 25 fixed to the front shaft 21 rotate synchronously. Preferably, the front shaft 21 has a first key groove, the middle of the pivoting forearm 25 has a forearm through hole and a second key groove communicating with the forearm through hole, wherein the end of the front shaft 21 penetrates The forearm inserted and held in the pivoting forearm 25 is perforated so that the first keyway and the second keyway correspond to each other, and a flat key is held in the first keyway of the front shaft 21 And the second keyway of the pivoting forearm 25 to fixedly mount the pivoting forearm 25 on the front shaft 21. Optionally, the middle of the pivoting forearm 25 is welded to the end of the front shaft 21 to fix the middle of the pivoting forearm 25 to the front shaft 21. Optionally, the middle of the pivoting forearm 25 is provided with an assembly hole that matches the cross-sectional size and shape of the front shaft 21, so that the front shaft 21 and the pivoting forearm 25 pass through a gap. The way of mating is to fix the connection. Those skilled in the art should be aware that the connection manner of the front shaft 21 and the pivoting forearm 25 is not limited, and cannot be the content and scope of the height adjustment device 100 and the lawn mower 1000 of the present invention. limits.

Correspondingly, the pivoting rear arm 26 has a first rear arm extension 263 and a second rear arm extension 264, wherein the second rear arm extension 264 extends integrally with the first rear arm extension 263, and the extension direction of the first rear arm extension 263 and the extension direction of the second rear arm extension 264 have an acute angle, so that the first rear arm extension 263 and the second rear arm extension 263 A rear arm opening 265 is formed between the rear arm extensions 264. For example, the shape of the pivoting rear arm 26 is approximately a "V" shape or a "√" shape. The first rear arm extension 263 of the pivoting rear arm 26 forms the rear arm inner end 262, and the second rear arm extension 264 of the pivoting rear arm 26 forms the rear arm outer end 261, and the rear arm opening 265 of the pivoting rear arm 26 faces upward.

Both ends of the rear shaft 22 are respectively fixed to the middle of the two pivoting rear arms 26, that is, the rear shaft 22 is fixed to the first rear arm extension 263 and the second rear arm. The connecting position of the arm extension 264, and the rear shaft 22 and the pivotal rear arm 26 fixed to the rear shaft 22 rotate synchronously. Preferably, the rear shaft 22 has a third key groove, the middle of the pivoting rear arm 26 has a rear arm through hole and a fourth key groove connecting the rear arm through hole, wherein the rear shaft 22 has a The end penetrates and is held in the rear arm of the pivoting rear arm 26, so that the third keyway and the fourth keyway correspond to each other, and a flat key is held on the rear shaft 22. The third key groove and the fourth key groove of the pivoting rear arm 26 are used to fix the pivoting rear arm 26 to the rear shaft 22. Optionally, the middle of the pivoting rear arm 26 is welded to the end of the rear shaft 22 to fix the middle of the pivoting rear arm 26 to the rear shaft 22. Optionally, the middle part of the pivoting rear arm 26 is provided with an assembly hole matching the cross-sectional size and shape of the rear shaft 22, so that the rear shaft 22 and the pivoting rear arm 26 The connection is fixed by means of clearance fit.

3 and 4, the heights of the two front shafts 21 spaced apart from each other are the same, and the height of the front shaft 21 is the same as the height of the rear shaft 22, the pivoting of the forearm 25 The middle part is fixedly mounted to the end of the front shaft 21 in such a manner that the forearm opening 255 of the pivoting forearm 25 faces downward, and the middle part of the pivoting rear arm 26 is fixed to the end of the pivoting rear arm 26 so that the pivoting rear arm The rear arm opening 265 of the 26 is fixedly installed at the end of the rear shaft 22 in a manner that it faces upwards, so that the height of the inner end 252 of the forearm of the pivoting forearm 25 is lower than that after the pivoting. The height of the rear arm inner end 262 of the arm 26, and the height of the forearm outer end 251 of the pivoting forearm 25 is the same as the height of the rear arm outer end 261 of the pivoting rear arm 26, In this way, the pushing forearm 27 that is rotatably installed on the forearm outer end 251 of the pivoting forearm 25 and the pushing forearm 27 that is rotatably installed on the rear arm outer end 261 of the pivoting rear arm 26 The pushing rear arm 28 allows the trimming device 300 installed at the low end of the pushing forearm 27 and the low end of the pushing rear arm 28 to be horizontally held in the lower space of the fuselage 200. It can be understood that the connecting arm 29 is in an inclined state. Preferably, the connecting arm 29 has a convex arc shape, so that the driving unit 10 can easily drive the rear shaft 22 to simultaneously drive the front shaft 21 to rotate through the connecting arm 29. Thus, the trimming device 300 is driven to rise and fall vertically.

Continuing to refer to FIGS. 3 and 4, the front mounting member 23 has a first through hole 230, and both ends of the front rotating shaft 21 pass through the first through hole of each front mounting member 23, respectively. The perforation 230 extends to the outer side of each of the front mounting members 23 to allow the middle of the pivoting forearm 25 to be fixedly mounted on the end of the front shaft 21 on the outer side of the front mounting member 23 . Preferably, the end of the front rotating shaft 21 is rotatably installed in the first through hole 230 of the front mounting member 23 through a bearing.

Specifically, the front mounting member 23 has a first front clamping plate 231 and a second front clamping member 232, wherein the first front clamping plate 231 and the second front clamping member 232 each have a Notches, and the first front clamping plate 231 and the second front clamping member 232 are mutually corresponding to each other in such a way that the notch of the first front clamping plate 231 and the notch of the second front clamping member 232 correspond to each other. Installed to form the first through hole 230 between the first front clamping plate 231 and the second front clamping member 232.

Correspondingly, the rear mounting member 24 has a second through hole 240, and both ends of the rear shaft 22 respectively extend through the second through hole 240 of each rear mounting member 24 to each of the The outer side of the rear mounting member 24 allows the middle of the pivoting rear arm 26 to be fixedly mounted to the end of the rear shaft 22 on the outer side of the rear mounting member 24. Preferably, the end of the rear shaft 22 is rotatably installed in 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 are respectively There is a notch, and the first rear clamping member 241 and the second rear clamping member 242 correspond to each other with the notch of the first rear clamping member 241 and the notch of the second rear clamping member 242 The second through hole 240 is formed between the first rear clamping member 241 and the second rear clamping member 242.

Preferably, referring to FIGS. 3 and 4, the driving unit 10 is implemented as an electric driving device, that is, the driving unit 10 converts electrical energy into mechanical energy to drive the adjustment unit 20 to work. 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 push rod 11 is mounted on the body 200, one end of the drive swing arm 12 is rotatably mounted on the telescopic end 112 of the electric push rod 11, and the drive The other end of the swing arm 12 is fixedly arranged on the rear shaft 22. When the telescopic end 112 of the electric push rod 11 expands and contracts, the electric push rod 11 can drive the rear shaft 22 to rotate synchronously through the drive swing arm 12.

Referring to FIGS. 5A to 6B, the user can control the telescopic end 112 of the electric push rod 11 to expand and contract, for example, the user may control the electric push rod through but not limited to a control button provided on the body 200 The telescopic end 112 of 11 telescopes. When the telescopic end 112 of the electric push rod 11 switches from a contracted state to an extended state, the electric push rod 11 drives the rear shaft 22 to rotate through the drive swing arm 12, and the rear shaft 22 rotates. The rotating shaft 22 drives each pivoting rear arm 26 to rotate synchronously to reduce the height of the rear arm outer end 261 of each pivoting rear arm 26. At the same time, each pivoting rear arm 26 The inner end 262 of the rear arm drives each of the pivoting forearms 25 to rotate through each of the connecting arms 29 to reduce the height of the outer end 251 of each of the pivoting forearms 25, because each The height of the forearm outer end 251 of the pivoting forearm 25 and the height of the rear arm outer end 261 of each pivoting rear arm 26 are simultaneously lowered, so that the ground clearance of the trimming device 300 is adjusted . Correspondingly, when the telescopic end 112 of the electric push rod 11 transitions from the extended state to the contracted state, the electric push rod 11 drives the rear rotating shaft 22 to the direction through the drive swing arm 12 Rotating in the opposite direction, the rear shaft 22 drives each pivoting rear arm 26 to rotate synchronously to increase the height of the rear arm outer end 261 of each pivoting rear arm 26. At the same time, The inner end 262 of the rear arm of each pivoting rear arm 26 drives each of the pivoting forearms 25 to rotate through each of the connecting arms 29, so as to raise the pivot of each pivoting forearm 25. The height of the forearm inner end 252, because the height of the forearm outer end 251 of each pivoting forearm 25 and the height of the rear arm outer end 261 of each pivoting rear arm 26 are raised synchronously , Thereby the ground clearance of the trimming device 300 is adjusted.

Those skilled in the art can understand that the above embodiments are only examples, in which the features of different embodiments can be combined with each other to obtain implementations that are easily conceivable according to the disclosure of the present invention but are not clearly indicated in the accompanying drawings.

Those skilled in the art should understand that the above description and the embodiments of the present invention shown in the accompanying drawings are only examples and do not limit the present invention. The purpose of the present invention has been completely and effectively achieved. The functions and structural principles of the present invention have been shown and explained in the embodiments. Without departing from the principles, the implementation of the present invention may have any deformation or modification.

Claims (16)

1. A height adjustment device, characterized in that it includes:

   A drive unit; and

   An adjustment unit, wherein the adjustment unit includes two front shafts, a rear shaft, two front mounting parts, two rear mounting parts, two pivoting forearms, two pivoting rear arms, two pushing forearms, and two pushing rear An arm and two connecting arms, wherein the two front rotation shafts are independent of each other, the two front mounting parts are respectively mounted on the two front rotation shafts, and the middle of the two pivoting forearms are respectively provided On the two front shafts, both ends of the rear shaft are rotatably mounted on the two rear mounting parts, and the rear shaft is driveably connected to the drive unit, Wherein the middle of each pivoting rear arm is respectively arranged at both ends of the rear shaft, wherein the two pushing forearms are respectively rotatably mounted on the outer ends of the forearms of the two pivoting forearms, Two of the pushing rear arms are respectively rotatably installed on the outer ends of the rear arms of the two pivoting rear arms, and both ends of each of the connecting arms are respectively rotatably installed on the pivoting The inner end of the forearm of the forearm and the inner end of the rear arm of the pivoted rear arm.
2. The height-adjusting device according to claim 1, wherein the pushing forearm includes a fitting portion and a movable portion extending downward from the fitting portion, wherein the fitting portion is operably installed on the pivoting forearm And the relative position of the assembling part and the pivoting forearm is allowed to be adjusted.
3. The height adjustment device according to claim 2, wherein the movable part is bent downwardly from the assembling part.
4. The height adjustment device according to claim 3, wherein the movable part is ring-shaped.
5. The height adjustment device according to claim 4, wherein the adjustment unit further has two assembly parts, wherein the assembly parts include a fitting arm, a mounting arm, and a holding arm, wherein the mounting arm extends integrally with In the fitting arm, both ends of the holding arm are respectively connected to the mounting arm and the pivoting forearm, and the pivoting forearm is operably installed on the holding arm.
6. The height adjustment device according to claim 4, wherein the holding arm has an assembling through hole, and the pivoting forearm is held in the pivoting through hole to be movable up and down.
7. The height adjustment device according to any one of claims 1 to 6, wherein the length dimension of the pushing forearm is greater than the length dimension of the pushing back arm.
8. The height adjustment device according to claim 7, wherein the difference between the length of the pushing forearm and the length of the pushing back arm is in the range of 3mm-6mm.
9. A lawn mower with a height adjustment device is characterized in that it includes:

   A fuselage

   A trimming device; and

   A height adjustment device, wherein the height adjustment device includes a drive unit and an adjustment unit, wherein the adjustment unit includes two front shafts, a rear shaft, two front mounting parts, two rear mounting parts, and two pivots Turn the forearm, the two pivoting rear arms, the two pushing forearms, the two pushing rear arms, and the two connecting arms, wherein the two front rotating shafts are independent of each other, and the two front mounting parts are respectively mounted on the two fronts. The middle part of the two pivoting forearms are respectively arranged on the two front shafts, and both ends of the rear shaft are rotatably mounted on the two rear mounting parts, and The rear shaft is drivably connected to the drive unit, wherein the middle of each pivoting rear arm is respectively arranged at both ends of the rear shaft, and the two pushing forearms are respectively driven Are rotatably mounted on the outer ends of the forearms of the two pivoting forearms, wherein the two pushing rear arms are respectively rotatably mounted on the outer ends of the rear arms of the two pivoting rear arms, wherein each of the Both ends of the connecting arm are respectively rotatably mounted on the inner end of the forearm of the pivoting forearm and the inner end of the rear arm of the pivoting rear arm, wherein the two front mounting parts are respectively provided on the machine The two rear mounting parts are respectively provided on the body, the low ends of the two pushing forearms are respectively provided on the trimming device, and the low ends of the two pushing rear arms are respectively provided It is installed in the trimming device.
10. The lawn mower with a height adjustment device according to claim 9, wherein the pushing forearm includes an assembly part and a movable part extending downward from the assembly part, wherein the assembly part is operably installed On the pivoting forearm, the relative position of the assembling part and the pivoting forearm is allowed to be adjusted.
11. The height adjustment device according to claim 10, wherein the movable part is bent downwardly from the assembling part.
12. The lawn mower with a height adjustment device according to claim 11, wherein the movable part is ring-shaped.
13. The lawn mower with a height adjustment device according to claim 12, wherein the adjustment unit further has two assembly parts, wherein the assembly parts include a fitting arm, a mounting arm and a holding arm, wherein the A mounting arm is integrally extended to the fitting arm, two ends of the holding arm are respectively connected to the mounting arm and the pivoting forearm, and the pivoting forearm is operably mounted to the holding arm.
14. The lawn mower with a height adjustment device according to claim 12, wherein the holding arm has an assembly through hole, and the pivoting forearm is held in the pivoting through hole to be movable up and down.
15. The lawn mower with a height adjustment device according to any one of claims 9 to 14, wherein the length dimension of the pushing forearm is greater than the length dimension of the pushing rear arm.
16. The lawn mower with a height adjustment device according to claim 15, wherein the difference between the length of the pushing forearm and the length of the pushing back arm is in the range of 3mm-6mm.

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