阅读说明：本技术 刹车释放装置和电动割草机械 (Brake release device and electric mowing machine ) 是由 陈亚明 徐锋 郑挺 刘列 吴迪 姚远 于 2020-03-31 设计创作，主要内容包括：本发明公开了一刹车释放装置和电动割草机械,其中所述刹车释放装置用于操作一刹车装置自一刹车状态切换至一行车状态,所述刹车释放装置包括至少一拨叉、一转盘机构、一牵拉机构以及至少一联动机构。所述拨叉被安装于所述刹车装置,所述转盘机构包括一转盘元件,所述转盘元件被可转动地保持在所述刹车装置的侧部,所述牵拉机构的一个端部被安装于所述转盘元件的边缘,所述牵拉机构的另一个端部被允许手动操作,所述联动机构的一个端部被设置于所述转盘元件的边缘,所述联动机构的另一个端部被设置于所述拨叉。(The invention discloses a brake release device and an electric mowing machine, wherein the brake release device is used for operating a brake device to be switched from a brake state to a driving state, and comprises at least one shifting fork, a turntable mechanism, a traction mechanism and at least one linkage mechanism. The fork is mounted to the brake, the disc mechanism includes a disc member rotatably held at a side of the brake, one end of the drawing mechanism is mounted to an edge of the disc member, the other end of the drawing mechanism is allowed to be manually operated, one end of the linkage mechanism is provided to the edge of the disc member, and the other end of the linkage mechanism is provided to the fork.)

1. An electric lawn mowing machine, comprising:

a frame;

a power supply device, wherein the power supply device is arranged on the frame;

two driving motors, wherein the two driving motors are respectively arranged at two opposite sides of the rear part of the rack, and each driving motor is respectively connected to the power supply device;

a set of wheels, wherein the set of wheels comprises two driving wheels and two driven wheels, each driving wheel is respectively and drivably installed on each driving motor, and each driven wheel is respectively arranged on the opposite front sides of the front part of the frame;

a mowing device, wherein the mowing device is disposed on the housing, and the mowing device is connected to the power supply;

a brake release device, wherein the brake release device is disposed on the frame, wherein the brake release device has a standby state and a release state, and the brake release device is configured to be manually switched between the standby state and the release state; and

and two braking devices, wherein each braking device is respectively arranged on each driving motor and connected to the power supply device, and each braking device is respectively and operatively connected to the brake release device, wherein each braking device respectively has a braking state and a driving state, when the brake release device is in the standby state, each braking device is respectively capable of switching between the braking state and the driving state, and when the brake release device is in the release state, each braking device is kept in the driving state.

2. The electric lawn mower of claim 1, wherein said brake release mechanism comprises a turntable mechanism, a pulling mechanism, two forks, and two linkages, wherein said turntable mechanism is rotatably mounted to said frame in such a manner as to be held between two of said driving motors, wherein one end of said pulling mechanism is mounted to said turntable mechanism at a position offset from a rotational axis of said turntable mechanism, and the other end of said pulling mechanism extends to a rear portion of said frame, wherein each fork is mounted to each of said brake devices, wherein one end of each linkage is mounted to said turntable mechanism at a position offset from a rotational axis of said turntable mechanism, and the other end of each linkage is mounted to each fork.

3. The electric lawnmower of claim 2, wherein the reel mechanism comprises a reel member rotatably mounted to the frame and a retaining projection rotatably mounted to an edge of the reel member, the retaining projection having a retaining aperture, wherein the pulling mechanism comprises a handle, a pulling member having a middle portion movably mounted to the retaining aperture of the retaining projection, and a compression spring member retained between the retaining projection and one end of the pulling member, the other end of the pulling member being connected to the handle.

4. An electrically powered mowing device according to claim 3, wherein one end of the linkage is rotatably mounted to an edge of the reel element and the other end of the linkage is rotatably mounted to the fork.

5. The electric lawn mower of claim 3, wherein said linkage comprises a right angle joint bearing mounted to said turntable element, a joint bearing adjusting lever mounted to said fork, and a horizontal joint bearing mounted at both ends thereof to said right angle joint bearing and said horizontal joint bearing, respectively.

6. The mower of claim 3 wherein the brake release mechanism comprises a limit mechanism mounted to the frame and having a limit channel, wherein the handle comprises a handle portion and an extension limit portion extending from the handle portion, wherein the extension limit portion of the handle is movably mounted to the limit channel of the limit mechanism to limit the direction of movement of the handle.

7. The mower of claim 3 wherein the housing has a limit channel, wherein the handle comprises a handle portion and an extension limit portion extending from the handle portion, wherein the extension limit portion of the handle is movably mounted to the limit channel of the housing to limit the direction of movement of the handle.

8. The device of claim 6, wherein the restraining mechanism includes at least one stop channel in communication with the restraining channel, wherein the pull handle includes at least one stop extending outwardly from the extension limiting portion, wherein the stop of the pull handle is capable of passing through the stop channel of the restraining mechanism when the extension limiting portion of the pull handle is moved along the restraining channel of the restraining mechanism, and wherein the stop and the stop channel of the restraining mechanism are misaligned with each other when the pull handle is rotated relative to the restraining mechanism to prevent the extension limiting portion of the pull handle from moving along the restraining channel of the restraining mechanism.

9. An electrically powered mowing device according to any of claims 1 to 8, further comprising an elevation means, wherein the elevation means is provided on the housing and the mowing device is provided on the elevation means.

10. A brake release device for operating a brake device to switch from a braking state to a driving state, comprising:

at least one shift fork, wherein the shift fork is mounted to the brake device;

a disc mechanism, wherein the disc mechanism includes a disc member rotatably held at a side portion of the brake device;

a pulling mechanism, wherein one end of the pulling mechanism is mounted to an edge of the dial element, the other end of the pulling mechanism being allowed to be manually operated; and

at least one linkage, wherein one end of the linkage is arranged at the edge of the turntable element and the other end of the linkage is arranged at the fork.

11. The brake release device of claim 10, wherein the brake release device includes two of the shift forks and two of the link mechanisms, the disc member is rotatably held between the two brake devices, each of the shift forks is respectively mounted to each of the brake devices, one end of each of the link mechanisms is respectively provided to an edge of the disc member, and the other end of each of the link mechanisms is respectively provided to each of the shift forks.

12. The brake release device of claim 11, wherein one end of the linkage is rotatably mounted to an edge of the dial element and the other end of the linkage is rotatably mounted to the fork.

13. The brake release device according to claim 11, wherein the linkage mechanism includes a right angle joint bearing mounted to the turntable element, a joint bearing adjusting lever mounted to the fork, and a horizontal joint bearing having both ends mounted to the right angle joint bearing and the horizontal joint bearing, respectively.

14. The brake release device of claim 11, wherein the brake release device includes a limit mechanism and the limit mechanism has a limit channel, wherein the handle includes a hand-held portion and an extension-limiting portion extending from the hand-held portion, wherein the extension-limiting portion of the handle is movably mounted to the limit channel of the limit mechanism to limit a direction of movement of the handle.

15. The brake release device of claim 14, wherein the hold down mechanism includes at least one stop channel in communication with the hold down channel, wherein the pull handle includes at least one stop extending outwardly from the extension limiting portion, wherein the stop of the pull handle is capable of passing through the stop channel of the hold down mechanism as the extension limiting portion of the pull handle moves along the hold down channel of the hold down mechanism, and wherein the stop and the stop channel of the hold down mechanism are misaligned with each other as the pull handle is rotated relative to the hold down mechanism to prevent the extension limiting portion of the pull handle from moving along the hold down channel of the hold down mechanism.

Technical Field

The invention relates to the field of mowing equipment, in particular to a brake release device and an electric mowing machine.

Background

A lawn mower, such as a riding lawn mower, is an automated mechanical tool for trimming a lawn that can replace a human being to reduce manpower and labor costs, and allows a driver to operate in a riding manner to trim the lawn. In recent years, with the continuous development of electronic information technology and scientific technology and the continuous enhancement of environmental awareness of people, an electric mower using electric energy as an energy source begins to appear, and specifically, the electric mower provides a frame, a lithium battery pack, an electric control system, a mowing mechanism, two driving motors, two traveling wheels, two supporting wheels and two braking devices. The lithium battery pack and the electric control system are respectively arranged on the rack, and the lithium battery pack is controllably connected to the electric control system. A mowing mechanism is disposed on the chassis and is connected to the electronic control system. The two driving motors are respectively arranged at two opposite sides of the rear part of the rack, and the two driving motors are respectively connected to the electric control system. Each of the road wheels is respectively and drivably mounted to each of the driving motors so that each of the road wheels is respectively held at opposite sides of the rear portion of the frame. The supporting wheels are respectively arranged at two opposite sides of the front part of the frame. The two brake devices are respectively arranged on the two driving motors, and are respectively connected to the electric control system. The electric control system can control the lithium battery pack to supply power to each brake device and each driving motor so as to enable the driving motor to drive the travelling wheel to rotate to enable the electric mower to travel after the brake device enables the electromagnet to generate suction to separate the brake pad in the power-on state, and can control the lithium battery pack to supply power to the mowing mechanism so as to enable the mowing mechanism to perform mowing operation. The electric mower realizes operation based on electric control, once the electric control system breaks down, the brake device cannot be powered to cause the brake pad to be incapable of being separated, and further the whole electric mower cannot move, so that the electric mower is difficult to move to a maintenance place from the fault place, and inconvenience is caused to maintenance of the electric mower. And in the case where the brake pads of the brake device of the electric mower are not separated, if the electric mower is forcibly moved, the drive motor and other mechanisms of the electric mower, such as the transmission case, are easily damaged.

Disclosure of Invention

An object of the present invention is to provide a brake release device and an electric lawn mower, wherein the brake release device can easily release a brake device of the electric lawn mower when the electric lawn mower is in a fault, so as to allow the electric lawn mower to be easily moved from the fault to a maintenance site, for example, after the brake device of the electric lawn mower is released, the electric lawn mower can be moved from the fault to the maintenance site by pushing the electric lawn mower.

An object of the present invention is to provide a brake release device and an electric lawn mower, wherein the brake release device is allowed to be manually released, for example, the brake release device can be switched from a standby state to a release state by pulling a handle of the brake release device outward to release the brake device of the electric lawn mower, so that the brake device of the electric lawn mower can be easily released by manually operating the brake release device even when an electric control system of the electric lawn mower is in failure.

An object of the present invention is to provide a brake release device and an electric lawn mower, in which the brake release device can be maintained in a released state to facilitate moving the electric lawn mower from a trouble place to a maintenance place.

An object of the present invention is to provide a brake release device and an electric lawn mower, wherein the brake release device can automatically switch from a release state to a standby state to enable an electric control system of the electric lawn mower to resume control over a brake device of the electric lawn mower.

An object of the present invention is to provide a brake release device and an electric lawn mower, wherein the brake release device can synchronously release two brake devices of the electric lawn mower for easy operation and preventing misoperation.

One object of the present invention is to provide a brake release device and an electric lawn mower, wherein the electric lawn mower provides an elevation device and a lawn mower, the elevation device is configured to hold the lawn mower in a lower space of a housing of the electric lawn mower, and the elevation device is capable of adjusting a ground clearance of the lawn mower so that the electric lawn mower can meet mowing requirements of different heights.

In one aspect, the present invention provides a brake release device, including:

a frame;

a power supply device, wherein the power supply device is arranged on the frame;

two driving motors, wherein the two driving motors are respectively arranged at two opposite sides of the rear part of the rack, and each driving motor is respectively connected to the power supply device;

a set of wheels, wherein the set of wheels comprises two driving wheels and two driven wheels, each driving wheel is respectively and drivably installed on each driving motor, and each driven wheel is respectively arranged on the opposite front sides of the front part of the frame;

a mowing device, wherein the mowing device is disposed on the housing, and the mowing device is connected to the power supply;

a brake release device, wherein the brake release device is disposed on the frame, wherein the brake release device has a standby state and a release state, and the brake release device is configured to be manually switched between the standby state and the release state; and

and two braking devices, wherein each braking device is respectively arranged on each driving motor and connected to the power supply device, and each braking device is respectively and operatively connected to the brake release device, wherein each braking device respectively has a braking state and a driving state, when the brake release device is in the standby state, each braking device is respectively capable of switching between the braking state and the driving state, and when the brake release device is in the release state, each braking device is kept in the driving state.

According to an embodiment of the present invention, the brake release device includes a turntable mechanism, a pulling mechanism, two forks, and two linkages, wherein the turntable mechanism is rotatably mounted to the frame in such a manner as to be held between the two driving motors, wherein one end of the pulling mechanism is mounted to the turntable mechanism at a position offset from a rotational axis of the turntable mechanism, and the other end of the pulling mechanism extends to a rear portion of the frame, wherein each fork is mounted to each brake device, respectively, wherein one end of each linkage is mounted to the turntable mechanism at a position offset from a rotational axis of the turntable mechanism, and the other end of each linkage is mounted to each fork, respectively.

According to an embodiment of the present invention, the turntable mechanism includes a turntable member and a holding projection rotatably mounted to an edge of the turntable member, the turntable member being rotatably mounted to the frame, the holding projection having a holding through-hole, wherein the pulling mechanism includes a pull handle, a pulling member having a middle portion movably mounted to the holding through-hole of the holding projection, and a pressure spring member held between the holding projection and one end portion of the pulling member, the other end portion of the pulling member being connected to the pull handle.

According to one embodiment of the invention, one end of the linkage is rotatably mounted to an edge of the dial element and the other end of the linkage is rotatably mounted to the fork.

According to an embodiment of the invention, the linkage comprises a right angle oscillating bearing mounted to the turntable element, an oscillating bearing adjusting lever mounted to the fork, and a horizontal oscillating bearing mounted at both ends to the right angle oscillating bearing and the horizontal oscillating bearing, respectively.

According to one embodiment of the present invention, the brake release device includes a limiting mechanism mounted to the frame and having a limiting passage, wherein the handle includes a holding portion and an extension limiting portion extending from the holding portion, wherein the extension limiting portion of the handle is movably mounted to the limiting passage of the limiting mechanism to limit the moving direction of the handle.

According to an embodiment of the present invention, the frame has a limiting passage, wherein the handle includes a holding portion and an extending limiting portion extending from the holding portion, wherein the extending limiting portion of the handle is movably mounted to the limiting passage of the frame to limit the moving direction of the handle.

According to an embodiment of the present invention, the stop mechanism includes at least one stop channel, the stop channel is communicated with the stop channel, wherein the handle includes at least one stop, the stop extends outwards from the extension limiting part, wherein when the extension limiting part of the handle moves along the stop channel of the stop mechanism, the stop of the handle can pass through the stop channel of the stop mechanism, and when the handle rotates relative to the stop mechanism, the stop and the stop channel of the stop mechanism are mutually dislocated to prevent the extension limiting part of the handle from moving along the stop channel of the stop mechanism.

According to an embodiment of the present invention, the electric mowing device further comprises an elevation device, wherein the elevation device is disposed on the housing, and the mowing device is disposed on the elevation device.

According to another aspect of the present invention, there is further provided a brake release device for operating a brake device to switch from a braking state to a driving state, wherein the brake release device comprises:

at least one shift fork, wherein the shift fork is mounted to the brake device;

a disc mechanism, wherein the disc mechanism includes a disc member rotatably held at a side portion of the brake device;

a pulling mechanism, wherein one end of the pulling mechanism is mounted to an edge of the dial element, the other end of the pulling mechanism being allowed to be manually operated; and

at least one linkage, wherein one end of the linkage is arranged at the edge of the turntable element and the other end of the linkage is arranged at the fork.

According to an embodiment of the present invention, the brake release device includes two of the shift forks and two of the link mechanisms, the disc member is rotatably held between the two brake devices, each of the shift forks is respectively mounted to each of the brake devices, one end of each of the link mechanisms is respectively provided to an edge of the disc member, and the other end of each of the link mechanisms is respectively provided to each of the shift forks.

According to one embodiment of the invention, one end of the linkage is rotatably mounted to an edge of the dial element and the other end of the linkage is rotatably mounted to the fork.

According to an embodiment of the invention, the linkage comprises a right angle oscillating bearing mounted to the turntable element, an oscillating bearing adjusting lever mounted to the fork, and a horizontal oscillating bearing mounted at both ends to the right angle oscillating bearing and the horizontal oscillating bearing, respectively.

According to one embodiment of the present invention, the brake release device includes a limiting mechanism, and the limiting mechanism has a limiting channel, wherein the handle includes a holding portion and an extension limiting portion extending from the holding portion, wherein the extension limiting portion of the handle is movably mounted to the limiting channel of the limiting mechanism to limit the moving direction of the handle.

According to an embodiment of the present invention, the stop mechanism includes at least one stop channel, the stop channel is communicated with the stop channel, wherein the handle includes at least one stop, the stop extends outwards from the extension limiting part, wherein when the extension limiting part of the handle moves along the stop channel of the stop mechanism, the stop of the handle can pass through the stop channel of the stop mechanism, and when the handle rotates relative to the stop mechanism, the stop and the stop channel of the stop mechanism are mutually dislocated to prevent the extension limiting part of the handle from moving along the stop channel of the stop mechanism.

Drawings

Fig. 1A and 1B are perspective views of an electric lawn mower according to a preferred embodiment of the present invention.

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

Fig. 3 is a perspective view of a brake release device of the electric lawn mower according to the above preferred embodiment of the present invention.

Fig. 4 is an exploded view of the brake release device of the electric lawn mower according to the above preferred embodiment of the present invention.

Fig. 5A to 5C are schematic views of different operating states of the brake release device of the electric lawn mower according to the above preferred embodiment of the present invention.

Fig. 6 is a perspective view of an elevation adjustment device of the electric lawn mower according to the above preferred embodiment of the present invention.

Fig. 7 is an exploded view of the height adjusting device of the electric lawn mower according to the above preferred embodiment of the present invention.

FIG. 8A is a side view of a state of the lawn mower according to the above preferred embodiment of the present invention.

Fig. 8B is a perspective view of the height-adjusting mechanism of the lawn mower according to the above preferred embodiment of the present invention in the above state.

FIG. 9A is a side view of another aspect of the lawn mower according to the above preferred embodiment of the present invention.

Fig. 9B is a perspective view of the height-adjusting mechanism of the lawn mower according to the above preferred embodiment of the present invention in the above state.

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 an orientation or positional relationship indicated in the drawings for ease of description and simplicity of description, and do not indicate or imply that the referenced devices or components must be constructed and operated in a particular orientation and thus are not to be considered limiting.

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. 1A to 9B of the drawings of the present specification, an electric lawn mower according to a preferred embodiment of the present invention is disclosed and described in the following description, wherein the electric lawn mower includes a housing 10, a power supply 20, two driving motors 30, two braking devices 40, a set of wheels 50, and a mowing device 60.

The power supply device 20 is disposed on the housing 10, wherein the power supply device 20 is configured to provide electric power for the electric lawn mower to drive the power lawn mower to work. Preferably, the power supply device 20 is configured with a lithium battery to be able to be supplemented with electric power after the electric power of the power supply device 20 is consumed. For example, after the power of the power supply device 20 is consumed, the electric lawn mower allows the commercial power to be supplemented to the power supply device 20.

Each of the driving motors 30 is respectively disposed at both sides of the rear portion of the rack 10, and each of the driving motors 30 is respectively connected to the power supply device 20, wherein the power supply device 20 is configured to supply power to the driving motor 30 to operate the driving motor 30. Preferably, the driving motor 30 is connected to the power supply device 20 through an electronic control system, so as to allow the electronic control system to control the state that the power supply device 20 supplies power to the driving motor 30.

Each of the brake devices 40 is provided to each of the driving motors 30, respectively, and each of the brake devices 40 is connected to the power supply device 20, respectively. The brake device 40 has a braking state and a driving state, and the brake device 40 can be switched between the braking state and the driving state, wherein when the brake device 40 is in the braking state, the brake device 40 is configured to prevent the driving motor 30 from operating, and correspondingly, when the brake device 40 is in the driving state, the brake device 40 is configured to allow the driving motor 30 to operate. Specifically, brake equipment 40 includes an electro-magnet and a brake block, if brake equipment 40 the electro-magnet is not supplied power, then the brake block locks driving motor 30 makes brake equipment 40 be in the brake state, brake equipment 40 stops this moment driving motor 30 works, correspondingly, if brake equipment 40 the electro-magnet is supplied power, then the electro-magnet adsorbs the brake block is in order to release driving motor 30 and make brake equipment 40 be in the driving state, brake equipment 40 allows driving motor 30 to work this moment. Preferably, the braking device 40 is connected to the power supply device 20 through the electronic control system, so as to allow the electronic control system to control the state that the power supply device 20 supplies power to the braking device 40.

The set of wheels 50 includes two driving wheels 51 and two driven wheels 52, wherein each driving wheel 51 is respectively and drivably mounted to each driving motor 30 such that the two driving wheels 51 are disposed at opposite sides of the rear portion of the frame 10, and wherein each driven wheel 52 is disposed at opposite sides of the front portion of the frame 10.

The mowing device 60 is disposed on the housing 10, and the mowing device 60 is connected to the power supply device 20, wherein the power supply device 20 is configured to supply power to the mowing device 60 to operate the mowing device 60. Preferably, the grass cutting device 60 is connected to the power supply device 20 through the electronic control system to allow the electronic control system to control the state of the power supply device 20 supplying power to the grass cutting device 60.

Specifically, the working process of the electric mowing machine is as follows: when the power supply device 20 is set to supply power to the brake device 40, the brake device 40 is switched from the braking state to the driving state, so that the brake pads of the brake device 40 release the driving motor 30; when the power supply device 20 is configured to supply power to the driving motor 30, the driving motor 30 can drive the electric mowing machine to walk through the driving wheel 51; when the power supply device 20 is set to supply power to the grass cutting device 60, the grass cutting device 60 can cut the lawn; when the power supply device 20 is set to stop supplying power to the brake device 40, the brake device 40 is switched from the driving state to the braking state, so that the brake pad of the brake device 40 locks the driving motor 30 to prevent the electric mowing machine from walking.

With continued reference to fig. 1A-9B, the electric lawn mower of the present invention further comprises a brake release device 70, wherein the brake release device 70 is disposed on the frame 10, and each of the brake devices 40 is operatively connected to the brake release device 70. The brake release device 70 has a standby state and a release state, and the brake release device 70 can be manually operated to switch between the standby state and the release state.

When the brake release device 70 is in the standby state, the brake device 40 can be operated to switch between the braking state and the driving state, and accordingly, when the brake release device 70 is in the release state, the brake device 40 is operated to switch from the braking state to the driving state and is maintained in the driving state. Preferably, when the brake release device 70 is switched from the standby state to the release state, both of the brake devices 40 are operated to be synchronously switched from the braking state to the driving state to allow the electric lawn mower to be moved. For example, when the power supply device 20 of the electric lawn mower has a low power or when the electric control system of the electric lawn mower fails to supply power to the brake device 40, the brake device 40 cannot be driven by electric energy to switch from the braking state to the driving state, at this time, the brake pad of the brake device 40 locks the driving motor 30 to cause the electric mowing machine to be unable to walk, in this case, when the brake release device 70 is switched from the standby state to the release state by manually operating the brake release device 70, each of the brake devices 40 is capable of being actuated by the brake release device 70 to switch from the braking state to the driving state, in which the brake pads of the brake devices 40 release the driving motor 30 to allow the electric lawn mower to be easily pushed from a trouble place to a maintenance place.

With continued reference to fig. 1A-9B, the brake release device 70 includes a turntable mechanism 71, a pulling mechanism 72, two forks 73, and two linkages 74. The turntable mechanism 71 is rotatably mounted to the housing 10, and the turntable mechanism 71 is held between the two drive motors 30. One end of the pulling mechanism 72 is connected to the turntable mechanism 71, and the connection position of the pulling mechanism 72 and the turntable mechanism 71 is offset from the rotational axis of the turntable mechanism 71. Each of the shift forks 73 is installed at each of the brake devices 40, respectively, so that each of the brake devices 40 can be operated by each of the shift forks 73 to be switched from the braking state to the driving state. One end of each of the link mechanisms 74 is mounted to the dial mechanism 71, respectively, and the other end of each of the link mechanisms 74 is mounted to each of the forks 73, respectively, and the mounting positions of the link mechanisms 74 and the dial mechanism 71 are offset from the rotational axis of the dial mechanism 71. When a force is applied to the free end of the pulling mechanism 72 (the end of the pulling mechanism 72 not used for connecting the rotating disc mechanism 71), the pulling mechanism 72 can drive the rotating disc mechanism 71 to rotate around the rotating shaft relative to the frame 10, so as to allow the rotating disc mechanism 71 to drive each fork 73 through each linkage 74 to operate the brake device 40, so that the brake device 40 is switched from the braking state to the driving state.

Further, the turntable mechanism 71 includes a turntable member 711 and a retaining protrusion 712, wherein the turntable member 711 is rotatably mounted to the frame 10, wherein the retaining protrusion 712 is rotatably mounted to an edge of the turntable member 711, and the retaining protrusion 712 has a retaining through hole 7121. The pulling mechanism 72 includes a pulling handle 721, a pulling member 722, and a compressed spring member 723, wherein a middle portion of the pulling member 722 is movably mounted to the holding penetration 7121 of the holding protrusion 712, wherein the compressed spring member 723 is held between one end portion of the pulling member 722 and the holding protrusion 712, wherein the pulling handle 721 is provided at the other end portion of the pulling member 722. Preferably, the pressure spring member 723 is held between one end of the pulling member 722 and the holding projection 712 in such a manner as to be fitted around the pulling member 722, so that the pressure spring member 723 can be prevented from being disengaged from between the end of the pulling member 722 and the holding projection 712.

When the handle 721 is pulled outward to switch the brake release device 70 from the standby state to the release state, the handle 721 can pull the pulling member 722 outward synchronously and at the same amplitude so that the pulling member 722 and the holding protrusion 712 press the compressed spring member 723, and at this time, the compressed spring member 723 can push the holding protrusion 712 so as to allow the holding protrusion 712 to drive the rotary plate member 711 to rotate around the rotation axis relative to the frame 10, so that the rotary plate member 711 can switch the brake device 40 from the braking state to the driving state by operating the brake device 40 through each of the linkages 74 and each of the dials 73. Accordingly, when the pulling force applied to the handle 721 is removed, each of the braking devices 40 can be automatically switched from the driving state to the braking state, and at this time, each of the braking devices 40 can drive the rotating disc member 711 to rotate around the rotating shaft relative to the frame 10 through each of the forks 73 and each of the linkages 74, and the pulling member 722 and the handle 721 can be restored to the initial state under the mutual cooperation of the retaining protrusion 712 and the compressed spring member 723, so that the brake release device 70 can be switched from the release state to the standby state.

Further, the brake release device 70 includes a limiting mechanism 75, wherein the limiting mechanism 75 is disposed on the frame 10, and the limiting mechanism 75 forms a limiting channel 751. The pull handle 721 of the pulling mechanism 72 includes a hand-held portion 7211 and a retaining extension 7212 extending from the hand-held portion 7211, wherein the pulling element 722 is mounted to the retaining extension 7212 of the pull handle 721. The limit extension 7212 of the handle 721 is movably retained in the limit channel 751 of the limit mechanism 75 such that the limit mechanism 75 and the handle 721 of the pulling mechanism 72 cooperate to limit the direction of movement of the handle 721. In other examples of the electric lawn mower of the present invention, the housing 10 forms the limit channel 751 such that the limit extension 7212 of the handle 721 is movably held in the limit channel 751 of the housing 10, so that the housing 10 and the handle 721 of the pulling mechanism 72 cooperate with each other to limit the moving direction of the handle 721.

Further, the restraining mechanism 75 has at least one stopper channel 752, the stopper channel 752 is communicated with the restraining channel 751, wherein the handle 721 comprises at least one stopper 7213, the stopper 7213 extends outwardly from the restraining extension 7212, wherein when a force is applied to the handle 721 to move the extension restraining portion 7212 along the restraining channel 751 of the restraining mechanism 75, the stopper 7213 of the handle 721 can pass through the stopper channel 752 of the restraining mechanism 75, and the stopper 7213 and the stopper channel 752 of the restraining mechanism 75 can be misaligned by rotating the handle 721, so that the brake release device 70 can be maintained in the released state even when the external force applied to the handle 721 is removed. Specifically, the stopper mechanism 75 has two stopper channels 752, and the two stopper channels 752 are symmetrical to each other, and accordingly, the handle 721 has two stoppers 7213, and the two stoppers 7213 are symmetrical to each other.

The linkage mechanism 74 further includes a right angle joint bearing 741, a joint bearing adjusting lever 742, and a horizontal joint bearing 743, wherein the right angle joint bearing 741 is mounted to the turntable member 711, the horizontal joint bearing 743 is mounted to the fork 73, and both ends of the joint bearing adjusting lever 742 extend to be connected to the right angle joint bearing 741 and the horizontal joint bearing 743, respectively, such that the right angle joint bearing 741, the joint bearing adjusting lever 742, and the horizontal joint bearing 743 can cooperate with each other to operate the brake apparatus 40 by the fork 74 when the turntable member 711 is driven to rotate with respect to the frame 10.

Alternatively, in another example of the electric lawn mower of the present invention, both ends of the link mechanism 74 are rotatably mounted to the rotary plate member 711 and the fork 73, respectively, so that the brake device 40 is operated by the fork 74 when the rotary plate member 711 is driven to rotate with respect to the housing 10.

Referring to fig. 5A, when the brake release device 70 is in the standby state, if the power supply device 20 can normally supply power to the brake device 40, the brake device 40 can be kept in the driving state, and at this time, the driving motor 30 can be powered to drive the electric mowing machine to walk, and accordingly, if the power supply device 20 cannot normally supply power to the brake device 40, the brake device 40 is kept in the braking state, so that the electric mowing machine cannot move.

Referring to fig. 5B, when the handle 721 of the pulling mechanism 72 is pulled outwards, the pulling element 722 and the compressed spring element 723 of the pulling mechanism 72 and the holding protrusion 712 of the rotating disc mechanism 71 can cooperate with each other to rotate the rotating disc element 711 around the rotating shaft relative to the frame 10, so that the rotating disc element 711 can operate the brake 40 through the linkage mechanism 74 and the fork 73 to switch the brake 40 from the braking state to the driving state, and the electric lawn mower can be easily pushed to move.

Referring to fig. 5C, turning the handle 721 to misalign the stop 7213 of the handle 721 and the stop channel 752 of the restraining mechanism 75 such that the brake release 70 is maintained in the released state while the brake 40 is maintained in the drive state to allow the electric lawn mower to be remotely moved.

With continued reference to fig. 1 to 9B, the electric lawn mower further includes an elevation device 80, wherein the elevation device 80 is disposed on the housing 10, the lawn mowing device 60 is disposed on the elevation device 80, the lawn mowing device 60 is held in a lower space of the housing 10 by the elevation device 80, and the elevation device 80 is configured to adjust a relative position of the housing 10 and the lawn mowing device 60 to adjust a height of the lawn mowing device 60 from the ground, and to maintain the height of the lawn mowing device 60 from the ground in an adjusted state.

Specifically, the height-adjusting device 80 includes an electric driving unit 81 and an adjusting unit 82 which is drivably connected to the electric driving unit 81, wherein the electric driving unit 81 and the adjusting unit 82 are respectively disposed on the housing 10, the electric driving unit 81 is connected to the power supply device 20, and the grass cutting device 60 is disposed on the adjusting unit 82. When the electric driving unit 81 drives the adjusting unit 82, the adjusting unit 82 can lift the mowing device 60 to automatically adjust the height of the mowing device 60 from the ground.

More specifically, the electric drive unit 81 and the adjustment unit 82 are respectively disposed in the lower space of the housing 10, so that the adjustment unit 82 can hold the mowing device 60 in the lower space of the housing 10.

With continued reference to fig. 6-9B, the adjustment unit 82 includes a front hinge 821, a rear hinge 822, two front mounts 823, two rear mounts 824, two front pivot arms 825, two rear pivot arms 826, two front push arms 827, two rear push arms 828, and two connecting arms 829.

Each of the front installation bodies 823 is symmetrically provided to the rack 10, and both ends of the front rotary shaft 821 are extended to be rotatably installed to each of the front installation bodies 823, respectively, such that the front rotary shaft 821 is rotatably held in a lower space of the rack 10. Specifically, the front mounting body 823 may be mounted to the frame 10 by screws or by mutually matching screws and nuts, so as to dispose the front mounting body 823 to the frame 10. Alternatively, the front mounting body 823 may be welded to the rack 10, thereby disposing the front mounting body 823 to the rack 10. Optionally, the front mounting body 823 and a part of the mechanism of the rack 10 are of an integrated structure, so that the front mounting body 823 is disposed on the rack 10.

Accordingly, each of the rear mounting bodies 824 is symmetrically disposed on the main body 10, and both ends of the rear rotating shaft 822 extend to be rotatably mounted on each of the rear mounting bodies 824, such that the rear rotating shaft 822 is rotatably held in the lower space of the main body 10, wherein the rear rotating shaft 822 is drivably disposed on the electric driving unit 31 to allow the electric driving unit 31 to drive the rear rotating shaft 822 to rotate in the lower space of the main body 10. Specifically, the rear mounting body 824 may be mounted to the body 10 by means of screws or a screw and nut fit with each other, so that the rear mounting body 824 is disposed on the body 10. Alternatively, the rear mounting body 824 may be welded to the body 10, thereby disposing the rear mounting body 824 to the body 10. Alternatively, the rear mounting body 824 and a portion of the mechanism of the main body 10 are an integral structure, so that the rear mounting body 824 is disposed on the main body 10.

Each of the pivoting forearms 825 has an outer forearm end 8251 and an inner forearm end 8252, wherein the middle of each of the pivoting forearms 825 is rotatably mounted at two ends of the front rotating shaft 821 to drive each of the pivoting forearms 825 to rotate synchronously by the front rotating shaft 821. Accordingly, each of the rear pivoting arms 826 has a rear arm outer end 8261 and a rear arm inner end 8262, respectively, wherein the middle portion of each of the rear pivoting arms 826 is rotatably mounted at both ends of the rear rotating shaft 822, respectively, so that each of the rear pivoting arms 826 is synchronously rotated by the rear rotating shaft 822. The high end of each of the push forearms 827 is rotatably mounted to the forearm outer end 8251 of each of the pivot forearms 825, and the low end of each of the push forearms 827 is mounted to the mower 60. Accordingly, a high end portion of each said push-pull rear arm 828 is rotatably mounted to said rear arm outer end 8261 of each said pivot rear arm 826, and a low end portion of each said push-pull rear arm 828 is mounted to said mower 60. Each link arm 829 has a front end 8291 and a rear end 8292 corresponding to the front end 8291, wherein the front end 8291 of each link arm 829 is rotatably mounted to the front arm inner end 8252 of each front pivot arm 825, and the rear end 8292 of each link arm 829 is rotatably mounted to the rear arm inner end 8262 of each rear pivot arm 826.

Preferably, a lower end of each of the front pushing arms 827 is rotatably mounted on the mower 60, and a lower end of each of the rear pushing arms 828 is rotatably mounted on the mower 60, so that each of the front pushing arms 827 and each of the rear pushing arms 828 can vertically lift the mower 60 when each of the front pushing arms 827 and each of the rear pushing arms 828 are driven to rotate. More preferably, the length of the pushing front arm 827 is greater than that of the pushing rear arm 828, so that when each pushing front arm 827 and each pushing rear arm 828 are driven to rotate, each pushing front arm 827 and each pushing rear arm 828 can drive the mowing device 60 to horizontally and vertically lift, that is, the mowing device 60 can be kept horizontal all the time during the driving of the mowing device 60 to lift. In a preferred example of the mowing machine of the present invention, the difference between the length dimension of the push-stretch front arm 827 and the length dimension of the push-stretch rear arm 828 ranges from 3mm to 6mm (including 3mm and 6 mm). Preferably, the difference in length dimensions between the front and rear pushing arms 827, 828 is 4 mm.

With continued reference to fig. 6-9B, the pivoting forearm 825 has a first forearm extension 8253 and a second forearm extension 8254, wherein the direction of extension of the first forearm extension 8253 and the direction of extension of the second forearm extension 8254 are at an acute angle to form a forearm opening 8255 between the first forearm extension 8253 and the second forearm extension 8254. For example, the pivoting front arm 825 is generally "V" or "V" shaped. A middle portion of the pivoting forearm 825 is fixedly mounted to an end of the forward spindle 821 such that the first forearm extension 8253 of the pivoting forearm 825 forms the forearm inner end 8252 and the second forearm extension 8254 of the pivoting forearm 825 forms the forearm outer end 8251 with the forearm opening 8255 of the pivoting forearm 825 facing downward.

It should be noted that the way of fixedly mounting the middle of the pivoting front arm 825 at the end of the front spindle 821 is not limited in the lawn mower of the present invention. For example, in a preferred example of the mowing machine of the present invention, the front spindle 821 has a first key groove, and the middle of the pivoting front arm 825 has a front arm through hole and a second key groove communicating with the front arm through hole, wherein the end of the front spindle 821 is inserted into and held in the front arm through hole of the pivoting front arm 825 so that the first key groove and the second key groove correspond to each other, and a flat key is held between the first key groove of the front spindle 821 and the second key groove of the pivoting front arm 825 so as to fixedly mount the pivoting front arm 825 to the front spindle 821. Optionally, a middle portion of the pivoting front arm 825 is welded to an end of the front spindle 821 to fixedly mount the middle portion of the pivoting front arm 825 to the front spindle 821.

Accordingly, the pivoting rear arm 826 has a first rear arm extension 8263 and a second rear arm extension 8264, wherein the extension direction of the first rear arm extension 8263 and the extension direction of the second rear arm extension 8264 have an acute included angle to form a rear arm opening 8265 between the first rear arm extension 8263 and the second rear arm extension 8264. For example, the rear pivot arm 826 may be generally "V" shaped or "√" shaped. A middle portion of the rear pivot arm 826 is fixedly mounted to an end of the rear pivot 822 such that the first rear arm extension 8263 of the rear pivot arm 826 forms the rear arm inner end 8262 and the second rear arm extension 8264 of the rear pivot arm 826 forms the rear arm outer end 8261, and the rear arm opening 8265 of the rear pivot arm 826 faces upward.

It should be noted that the manner of fixedly mounting the middle portion of the pivoting rear arm 826 at the end of the rear spindle 822 is not limited in the lawn mowing machine of the present invention. For example, in a preferred example of the lawn mowing machine of the present invention, the rear spindle 822 has a third key slot, the rear pivoting arm 826 has a rear arm through hole and a fourth key slot communicating with the rear arm through hole in the middle thereof, wherein the end of the rear spindle 822 is inserted into and held in the rear arm through hole of the rear pivoting arm 826 such that the third key slot and the fourth key slot correspond to each other, and a flat key is held between the third key slot of the rear spindle 822 and the fourth key slot of the rear pivoting arm 826 to fixedly mount the rear pivoting arm 826 to the rear spindle 822. Optionally, a middle portion of the rear pivoting arm 826 is welded to an end of the rear spindle 822 to fixedly mount the middle portion of the rear pivoting arm 826 to the rear spindle 822.

Referring to fig. 6 to 9B, the height of the front rotation shaft 821 and the height of the rear rotation shaft 822 are the same, the middle portion of the front pivot arm 825 is fixedly mounted to the end portion of the front rotation shaft 821 with the front arm opening 8255 of the front pivot arm 825 facing downward, and the middle portion of the rear pivot arm 826 is fixedly mounted to the end portion of the rear rotation shaft 822 with the rear arm opening 8265 of the rear pivot arm 826 facing upward, such that the height of the front arm inner end 8252 of the front pivot arm 825 is lower than the height of the rear arm inner end 8262 of the rear pivot arm 826, and such that the height of the front arm outer end 8251 of the rear pivot arm 825 is the same as the height of the rear arm outer end 8261 of the rear pivot arm 826, and thus, the push-push front arm 827 rotatably mounted to the front arm outer end 8251 of the front pivot arm 825 and the push-push rear arm 828 rotatably mounted to the rear arm outer end 8261 of the rear pivot arm 826 are the same as each other The mower 60 mounted to the lower end of the push front arm 827 and the lower end of the push rear arm 828 is horizontally held in the lower space of the housing 10. It will be appreciated that the connecting arms 829 are inclined. Preferably, the connecting arm 829 is of a convex arc shape, so that the electric driving unit 81 can easily drive the rear rotating shaft 822 to simultaneously drive the front rotating shaft 821 to rotate via the connecting arm 829, thereby driving the mowing device 60 to vertically ascend and descend.

With continued reference to fig. 6 to 9B, the front mounting body 823 has a first through hole 8230, and both ends of the front rotating shaft 821 extend to the outside of each front mounting body 823 through the first through hole 8230 of each front mounting body 823, respectively, so as to allow the middle of the pivoting front arm 825 to be fixedly mounted to the end of the front rotating shaft 821 at the outside of the front mounting body 823. Preferably, an end of the front rotary shaft 821 is rotatably mounted to the first penetration hole 8230 of the front mounting body 823 through a bearing.

Specifically, the front mounting body 823 has a first forearm clamp plate 8231 and a second forearm clamp plate 8232, in which the first forearm clamp plate 8231 and the second forearm clamp plate 8232 have a notch, respectively, and the first forearm clamp plate 8231 and the second forearm clamp plate 8232 are mounted to each other in such a manner that the notch of the first forearm clamp plate 8231 and the notch of the second forearm clamp plate 8232 correspond to each other, so that the first through-hole 8230 is formed between the first forearm clamp plate 8231 and the second forearm clamp plate 8232.

Accordingly, the rear mounting body 824 has a second through hole 8240, and both ends of the rear rotary shaft 822 extend to the outer side of each rear mounting body 824 through the second through hole 8240 of each rear mounting body 824, respectively, to allow the middle portion of the pivoting rear arm 826 to be fixedly mounted to the end portion of the rear rotary shaft 822 at the outer side of the rear mounting body 824. Preferably, an end of the rear rotary shaft 822 is rotatably mounted to the second through hole 8240 of the rear mounting body 824 through a bearing.

Specifically, the rear mounting body 824 has a first rear arm clamp 8241 and a second rear arm clamp 8242, wherein the first rear arm clamp 8241 and the second rear arm clamp 8242 have a notch, respectively, and the first rear arm clamp 8241 and the second rear arm clamp 8242 are mounted to each other in such a manner that the notch of the first rear arm clamp 8241 and the notch of the second rear arm clamp 8242 correspond to each other, so that the second through hole 8240 is formed between the first rear arm clamp 8241 and the second rear arm clamp 8242.

Preferably, referring to fig. 6-9B, each of the pushing and extending forearms 827 has a slide 8270, and the outer forearm end 8251 of the pivoting forearm 825 is rotatably mounted to the slide 8270 of the pushing and extending forearm 827 such that when the front side of the mower 60 is acted upon by an upward force by an obstacle such as a rock, the mower 60 applies an upward force to the pushing and extending forearm 827 to allow movement of the pushing and extending forearm 827 relative to the pivoting forearm 825 by sliding the outer forearm end 8251 of the pivoting forearm 825 along the slide 8270 of the pushing and extending forearm 827 such that the front side of the mower 60 can be tilted higher than the rear side such that the mower 60 is prevented from being damaged by the obstacle such as a rock directly impacting the mower 60.

With continued reference to fig. 6-9B, the electric driving unit 81 includes an electric push rod 811 and a driving swing arm 812, wherein the electric push rod 811 has a mounting end 8111 and a telescopic end 8112 corresponding to the mounting end 8111, the mounting end 8111 of the electric push rod 811 is mounted to the frame 10, one end of the driving swing arm 812 is rotatably mounted to the telescopic end 8112 of the electric push rod 811, and the other end of the driving swing arm 812 is fixedly disposed on the rear rotating shaft 822. When the telescopic end 8112 of the electric putter 811 extends and contracts, the electric putter 811 can drive the rear rotary shaft 822 to synchronously rotate through the driving swing arm 812.

Referring to fig. 1 to 9B, the grass cutting device 60 further includes a protective housing 61, at least one grass cutting motor 62 and at least one cutting blade 63, wherein the protective housing 61 has a grass cutting space 611, a grass outlet 612 and at least one mounting channel 613, the grass outlet 612 communicates with the grass cutting space 611 at a side portion of the protective housing 61, the mounting channel 613 communicates with the grass cutting space 611 at an upper portion of the protective housing 61, wherein the grass cutting motor 62 is mounted at the upper portion of the protective housing 61, a rotor mechanism of the grass cutting motor 62 extends from the upper portion of the protective housing 61 to the grass cutting space 611 through the mounting channel 613, and the cutting blade 63 is drivingly mounted to the rotor mechanism of the protective housing 61 to maintain the cutting blade 63 in the grass cutting space 611 of the protective housing 61. Four corners of the protection housing 61 are respectively disposed at a lower end of each of the front pushing arms 827 and a lower end of each of the rear pushing arms 828, so as to allow each of the front pushing arms 827 and each of the rear pushing arms 828 to lift the mowing device 60. When the mowing machine is used for mowing, the cutter 63 can cut the lawn in the mowing space 611, and the cut grass pieces after being cut can be discharged out of the mowing space 611 through the grass outlet 612. Preferably, the mowing device 60 further comprises at least one roller 64, wherein each roller 64 is rotatably mounted on the front side of the protective housing 61 for supporting the protective housing 61.

Referring to fig. 8A to 9B, a user may control the telescopic end 8112 of the electric putter 811 to extend and retract, for example, the user may control the telescopic end 8112 of the electric putter 811 to extend and retract by, but not limited to, a control button provided on the housing 10. When the telescopic end 8112 of the electric push rod 811 is converted from a retracted state to an extended state, the electric push rod 811 rotates the rear rotating shaft 822 via the driving swing arm 812, the rear rotating shaft 822 rotates each of the pivoting rear arms 826 synchronously to lower the height of the rear arm outer end 8261 of each of the pivoting rear arms 826, and at the same time, the rear arm inner end 8262 of each of the pivoting rear arms 826 rotates each of the pivoting rear arms 826 via each of the connecting arms 829 to lower the height of the front arm outer end 8251 of each of the pivoting rear arms 826, because the height of the front arm outer end 8251 of each of the pivoting rear arms 825 and the height of the rear arm outer end 8261 of each of the pivoting rear arms 826 are synchronously lowered, so that the ground clearance of the mowing device 60 is adjusted. Accordingly, when the telescopic end 8112 of the electric push rod 811 is shifted from the extended state to the retracted state, the electric push rod 811 rotates the rear rotating shaft 822 in the opposite direction through the driving swing arm 812, the rear rotating shaft 822 rotates each of the pivoting front arms 825 synchronously to raise the height of the front arm outer end 8251 of each of the pivoting front arms 825, and at the same time, the rear arm inner end 8262 of each of the pivoting rear arms 826 rotates each of the pivoting rear arms 826 through each of the connecting arms 829 to raise the height of the front arm inner end 3251 of each of the pivoting front arms 825, because the height of the front arm outer end 8251 of each of the pivoting front arms 825 and the height of the rear arm outer end 8261 of each of the pivoting rear arms 826 are raised synchronously, so that the ground clearance of the mowing device 60 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 conceivable in accordance with the disclosure of the invention, but which are not explicitly indicated in the drawings.

It will be appreciated by persons skilled in the art that the embodiments of the invention described above and shown in the drawings are given by way of example only and are not limiting of the invention. The objects of the invention have been fully and effectively accomplished. The functional and structural principles of the present invention have been shown and described in the examples, and any variations or modifications of the embodiments of the present invention may be made without departing from the principles.