CN217936535U

CN217936535U - Grass cutter

Info

Publication number: CN217936535U
Application number: CN202221230443.6U
Authority: CN
Inventors: 曹金; 李汪浩; 高杰; 蒲志高
Original assignee: Globe Jiangsu Co Ltd
Current assignee: Globe Jiangsu Co Ltd
Priority date: 2022-05-18
Filing date: 2022-05-18
Publication date: 2022-12-02
Anticipated expiration: 2032-05-18

Abstract

The utility model provides a lawn mower relates to garden instrument technical field, include: a housing; the cutting machine frame is connected in the machine shell in a lifting way; the cutting device is fixed in the cutting rack; the height-adjusting motor is arranged in the shell and drives the cutting rack to reciprocate up and down; the transmission assembly is in transmission connection with the height-adjusting motor and the cutting rack; the transmission assembly comprises a screw rod and a threaded pipe, the threaded pipe is driven to rotate by the heightening motor, an external thread of the screw rod is meshed with an internal thread of the threaded pipe, and the screw rod is fixed on the cutting machine frame. The utility model discloses a heighten the transmission relation between motor, drive assembly and the cutting frame, realize automatic, the intellectuality of lawn mower cutting blade terrain clearance adjustment operation.

Description

Grass cutter

Technical Field

The utility model relates to a garden instrument technical field especially relates to a lawn mower.

Background

The mower is a mechanical tool for trimming lawns, vegetations and the like, can effectively improve the weeding efficiency of operation workers and reduce the labor intensity of the operation workers. However, different users have different requirements on the height of the lawn. For this reason, lawn mowers capable of adjusting the mowing height are continuously available in the market, so that users can freely select the mowing height, thereby controlling the height of the lawn after mowing.

The traditional manual regulation is common in the market at present, and the user adjusts the vertical height of the mowing system relative to the ground through an adjusting mechanism arranged on the outer surface of the machine, so that the height of the cut lawn is adjusted. The intelligent robot mower cannot be embodied in the adjusting mode, and poor experience is brought to a user.

Therefore, there is room for improvement in prior art lawn mowers.

SUMMERY OF THE UTILITY MODEL

In view of the above shortcomings of the prior art, an object of the present invention is to provide a lawn mower for solving the problem of low automation of the height-adjusting mechanism of the lawn mower in the prior art.

To achieve the above and other related objects, the present invention provides a mower, comprising: a housing; the cutting machine frame is connected in the shell in a lifting way; the cutting device is fixed in the cutting rack; the height-adjusting motor is arranged in the shell and drives the cutting machine frame to reciprocate up and down; the transmission assembly is in transmission connection with the height-adjusting motor and the cutting rack; the transmission assembly comprises a screw rod and a threaded pipe, the threaded pipe is driven to rotate by the heightening motor, an external thread of the screw rod is meshed with an internal thread of the threaded pipe, and the screw rod is fixed on the cutting machine frame.

In an embodiment of the present invention, the transmission assembly further includes: the driving gear is coaxially fixed with an output shaft of the heightening motor; and the driven gear is coaxially sleeved on the outer side of the threaded pipe and is connected with the threaded pipe.

In an embodiment of the present invention, the threaded pipe is connected to the driven gear through a rib plate, the rib plate is located between the threaded pipe and the driven gear, and the rib plate is provided with a plurality of rib plates along the circumferential interval of the threaded pipe.

In an embodiment of the present invention, the cutting frame is integrally formed with a first ear plate and a second ear plate, the first ear plate is located at the top of the side wall of the cutting frame, the second ear plate is located at the bottom of the side wall of the cutting frame, and the centers of the first ear plate and the second ear plate are located on the same straight line and are used for installation of the screw rod.

In an embodiment of the present invention, one end of the screw rod is fixed to the first ear plate, and the other end passes through the second ear plate and the threaded pipe is connected through a threaded connection, and the threaded pipe is located between the first ear plate and the second ear plate.

In an embodiment of the present invention, the housing includes: a base forming a cavity; the cover body is movably connected to the base; the support is fixed on the base and located in the cavity, and the support and the position abutted to the base are arranged in an opening and used for penetrating through the movement of the cutting machine frame.

In an embodiment of the present invention, a guiding mechanism is fixed on the support, and the guiding mechanism is disposed between the support and the cutter frame, and is used for guiding the movement direction of the cutter frame.

In an embodiment of the present invention, a damping mechanism is further fixed on the support, and the damping mechanism is disposed between the support and the cutting machine frame.

In an embodiment of the present invention, a mounting groove has been provided on the side wall of the cutting frame, and the buffer mechanism is fixed in the mounting groove.

In an embodiment of the utility model, the lawn mower still includes running gear, running gear includes the action wheel and follows the driving wheel, the action wheel is fixed the rear end of base, it fixes to follow the driving wheel the front end of base.

As above, the utility model discloses a lawn mower has following beneficial effect:

1. through directly fixing the screwed pipe with driven gear, adopt the internal thread of screwed pipe and the transmission mode of the external screw thread of lead screw, can improve transmission efficiency, reduce the momentum loss in transmission process, reduce the consumption to the heightened motor to reduce the holistic use cost of lawn mower.

2. Adopt the mode of gusset connection screwed pipe and driven gear, multiplicable screwed pipe and driven gear between joint strength, in addition, compare in alternate the screwed pipe support on driven gear, can reduce the whole weight of driven gear and screwed pipe to reduce the holistic weight of lawn mower.

Drawings

FIG. 1 is an isometric view of one embodiment of a lawnmower of the present invention;

fig. 2 is a schematic view of an internal structure of an embodiment of the mower of the present invention;

fig. 3 is a schematic structural view of an electric height-adjusting device of an embodiment of the lawn mower of the present invention;

fig. 4 is an exploded view of an electric height adjustment device of a lawn mower according to an embodiment of the present invention;

FIG. 5 is a schematic view of a driven gear of a lawn mower according to an embodiment of the present invention;

fig. 6 is a cross-sectional view of an electric height-adjusting device of a lawn mower according to an embodiment of the present invention.

Description of the element reference

100. A housing; 110. a base; 120. a cover body; 130. a support; 200. an electric height-adjusting device; 210. a slipping channel; 220. a cutter frame; 221. a first ear plate; 222. a second ear panel; 223. mounting grooves; 230. heightening the motor; 240. a transmission assembly; 241. a threaded pipe; 242. a screw rod; 243. a driving gear; 244. a driven gear; 245. a rib plate; 300. a walking device.

Detailed Description

The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will be readily apparent to those skilled in the art from the disclosure herein. The present invention can also be implemented or applied through other different specific embodiments, and various details in the present specification can be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the features in the following embodiments and examples may be combined with each other without conflict. It is also to be understood that the terminology used in the examples of the present invention is for the purpose of describing particular embodiments, and is not intended to limit the scope of the present invention. Test methods in which specific conditions are not noted in the following examples are generally performed under conventional conditions or conditions recommended by each manufacturer.

Please refer to fig. 1 to 6. It should be understood that the structure, ratio, size and the like shown in the drawings attached to the present specification are only used for matching with the content disclosed in the specification, so as to be known and read by those skilled in the art, and are not used for limiting the limit conditions that the present invention can be implemented, so that the present invention has no technical essential meaning, and any structure modification, ratio relationship change or size adjustment should still fall within the scope covered by the technical content disclosed in the present invention without affecting the function and the achievable purpose of the present invention. Meanwhile, the terms such as "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for convenience of description, and are not intended to limit the scope of the present invention, and changes or adjustments of the relative relationship thereof may be made without substantial technical changes, and the present invention is also regarded as the scope of the present invention.

Referring to fig. 1 and 2, the present invention provides a lawn mower for maintaining and trimming lawn and vegetation. In order to be applicable to different terrain environments, the utility model provides a lawn mower's cutting height can be adjusted. The technical scheme provided by the application not only can be suitable for an electric mower, but also is suitable for mowers of other advancing modes such as a stepping mower, a hand-push mower and a riding mower, or mowers driven by other power such as gasoline engine drive and solar drive.

Referring to fig. 1 and 2, in the present invention, the lawn mower includes a housing 100, a cutting device (not shown), an electric height-adjusting device 200, and a walking device 300. Wherein, the cutting device is at least partially installed inside the casing 100, and extends outside the casing 100 together with the components, and the cutting device is arranged in a lifting manner relative to the casing 100; the electric height-adjusting device 200 is arranged in the machine shell 100 and used for adjusting the cutting height of the cutting device, a sliding channel 210 is formed in the machine shell 100, and the cutting device is connected in the sliding channel 211 in a lifting mode; the walking device 300 is arranged at the bottom of the machine shell 100, and realizes the integral movement of the mower in the working process.

Referring to fig. 1 and fig. 2, in the present embodiment, the housing 100 includes a base 110 and a cover 120 movable relative to the base 110, and a cavity is formed on the base 110 and can be used for installing various components in the lawn mower; the casing further comprises a support for installing the electric height-adjusting device, wherein an opening (not marked in the figure) is formed in the positions, corresponding to the cutting device, on the base 110 and the support 130, and the opening is communicated with the sliding channel 210 in the electric height-adjusting device 200, in addition, the cutting device can slide in the sliding channel 210, and at least part of the cutting device extends out of the base in the direction away from the cover 120, so that the cutting device can cut lawn, vegetation and the like. It should be noted that the sliding channel 210 is parallel to the axial direction of the cutting device, i.e. the height-adjusting direction is parallel to the axial direction of the cutting device.

Referring to fig. 1 and 2, the walking device 300 is mounted on the base 110 for moving the lawn mower; in this embodiment, the walking device 300 includes two driving wheels and two driven wheels, the two driving wheels can be connected through a rotating shaft, and in some embodiments, the driving wheels can be connected with a motor or an engine through the rotating shaft, so that the driving wheels have driving force; in addition, the driven wheel can adopt a universal wheel, so that the adjustment of the moving direction is realized; the specific structures of the driving wheel and the driven wheel belong to the prior art, and are not described herein again.

Referring to fig. 1 and 2, in some embodiments of the invention, the cutting device includes a power machine and a cutting blade. The power machine is mounted on the cutter frame 220 in the electric height-adjusting device 200, and is lifted and lowered along with the reciprocating movement of the cutter frame 220 along the sliding channel 210, it should be noted that the power machine may be an electric motor, a gasoline engine or other power mechanism, and in this embodiment, the power machine is an electric motor; in addition, the output shaft of the power machine sequentially passes through the cutter frame 220 and the base 110, and is positioned outside the base 110; the cutting blade and one end of the output shaft of the power machine facing the ground are coaxially fixed, and a certain included angle is formed between the cutting blade and the output shaft of the power machine, so that the mowing operation of the mower is realized.

Referring to fig. 3 to 6, the electric height adjusting device 200 will be described in detail. In this embodiment, the electric height-adjusting device 200 includes a cutter frame 220, a height-adjusting motor 230 and a transmission assembly 240, wherein the support 130 is installed on the base 110 and located in a cavity formed on the base 110, and the support 130 can be used for installing the height-adjusting motor 230, the transmission assembly 240 and the cutter frame 220, it should be noted that the cutter frame 220 is connected with the support 130 in a sliding manner, and the height-adjusting motor 230 is connected with the cutter frame 220 through the transmission assembly 240 in a transmission manner, so that the cutter frame 220 can be lifted and lowered back and forth.

Referring to fig. 3 and 4, in the present embodiment, the top of the support 130 is open, the bottom of the support 130 is provided with a through hole (not labeled) for the output shaft of the power machine to pass through, and the sliding channel 210 is formed inside the support 130; the cutter frame 220 is slidably coupled within the slide channel 210. Further, the cutting frame 220 is arranged in a hollow cylinder shape, and the hollow part of the cutting frame is used for installing a cutting motor and penetrating a wire harness connected with the cutting motor; the cutter frame 220 is further integrally formed with a first ear plate 221 and a second ear plate 222, the first ear plate 221 is located on a side wall of the top position of the cutter frame 220, the second ear plate 222 is located on a side wall of the bottom position of the cutter frame 220, centers of the first ear plate 221 and the second ear plate 222 are located on the same straight line, and a screw 242 in the transmission assembly 240 is installed between the first ear plate 221 and the second ear plate 222.

In addition, the outer side wall of the cutting frame 220 is provided with a mounting groove 223, a guide mechanism (not marked in the figure) or a damping mechanism (not marked in the figure) can be mounted in the mounting groove 223, the guide mechanism and the damping mechanism can slide relatively along the length direction of the mounting groove 223 to realize height adjustment and guiding of the cutting frame 220, in addition, the damping mechanism reduces the influence of vibration generated by the mower in the moving process on the cutting frame 220 through the principle of elastic buffering, and the stability of the cutting frame 220 is ensured, it should be noted that three mounting grooves 223 are formed in the circumferential direction of the cutting frame 220, and the guide mechanism or the damping mechanism correspond to the mounting grooves 223 one by one; in some embodiments of the present invention, the damping mechanism and the guiding mechanism may be made of a metal material, for example, an aluminum profile.

Referring to fig. 4 and 5, in the present embodiment, the height-adjusting motor 230 is fixed on the support 130 and is located between the support 130 and the cutter frame 220; the transmission assembly 240 drivingly couples the height adjustment motor 230 and the cutter frame 220 and converts the rotational movement of the output shaft of the height adjustment motor 230 into linear movement of the cutter frame 220.

Further, the transmission assembly 240 includes a threaded tube 241, a lead screw 242, a driving gear 243, and a driven gear 244. The driving gear 243 is coaxially fixed with the output shaft of the height-adjusting motor 230, and the driving gear 243 and the driven gear 244 are engaged with each other, it should be noted that the number of teeth of the driven gear 244 is greater than that of the driving gear 243. In this embodiment, the driven gear 244 is a hollow cylinder, teeth meshed with the driving gear 243 are formed on the outer side wall of the driven gear 244, the driven gear 244 is coaxially sleeved on the outer side of the threaded pipe 241, the threaded pipe 241 is connected with the driven gear 244 through the rib plates 245, the rib plates 245 are located between the threaded pipe 241 and the driven gear 244, the rib plates 245 are arranged at intervals along the circumferential direction of the threaded pipe 241, the rib plates 245 can increase the connection strength between the threaded pipe 241 and the driven gear 244, and by adopting the connection mode, compared with the mode that the threaded pipe 241 is directly inserted into the driven gear 244, the overall weight of the driven gear 244 and the threaded pipe 241 can be reduced, and therefore the overall weight of the mower can be reduced. In other embodiments of the present application, an internal thread may be provided directly inside the driven gear 244, and the internal thread may be engaged with the external thread of the lead screw 242.

Referring to fig. 4, 5 and 6, one end of the screw 242 is fixed to the first ear plate 221, and the other end of the screw passes through the second ear plate 222 and extends partially outward, it should be noted that the height adjustment range of the cutter frame 220 is limited by the portion of the screw 242 within the first ear plate 221 and the second ear plate 222, and the specific height adjustment range can be adjusted according to the actual operation condition of the mower. The screw 242 is threadedly coupled to the threaded pipe 241 in a manner that an external thread of the screw 242 is engaged with an internal thread of the threaded pipe 241, and it should be noted that the screw 242 is not rotatable and the reciprocating elevation of the cutter frame 220 is achieved by the rotation of the threaded pipe 241. In addition, a fixing groove (not shown) is formed on the bottom wall of the support 130 corresponding to the position of the threaded pipe 241, one end of the threaded pipe 241 is embedded into the fixing groove, and the threaded pipe 241 can rotate in the fixing groove.

Through directly fixing screwed pipe 241 with driven gear 244, adopt the transmission mode of the internal thread of screwed pipe 241 and the external screw thread of lead screw 242, can improve transmission efficiency, reduce the momentum loss in the transmission process, reduce the consumption to the height motor to reduce the holistic use cost of lawn mower.

Briefly describing the ground clearance adjusting work of the cutting blade in the mower, in actual work, the heightening motor 230 is started, an output shaft of the heightening motor 230 drives the driving gear 243 to rotate, the driving gear 243 rotates to drive the driven gear 244 to rotate, so as to drive the threaded pipe 241 fixed with the driven gear 244 to rotate, and as the screw rod 242 cannot rotate, the screw rod 242 is lifted and lowered in a reciprocating manner under the transmission of the threaded pipe 241, so that the cutting rack 220 is lifted and lowered in a reciprocating manner, and the cutting blade ground clearance adjusting work is realized by the reciprocating lifting of the cutting rack 220.

To sum up, the utility model discloses a with screwed pipe 241 directly fixed with driven gear 244, the transmission mode of the internal thread of adopting screwed pipe 241 and the external screw thread of lead screw 242 can improve transmission efficiency, reduces the momentum loss in transmission process, reduces the consumption to the height-adjusting motor to reduce the holistic use cost of lawn mower. Therefore, the utility model effectively overcomes various defects in the prior art and has high industrial utilization value.

The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Any person skilled in the art can modify or change the above embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which may be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.

Claims

1. A lawn mower, comprising:

a housing;

the cutting machine frame is connected in the machine shell in a lifting way;

the cutting device is fixed in the cutting rack;

the height-adjusting motor is arranged in the shell and drives the cutting machine frame to reciprocate up and down;

the transmission assembly is in transmission connection with the height-adjusting motor and the cutting machine frame;

the transmission assembly comprises a screw rod and a threaded pipe, the threaded pipe is driven to rotate by the heightening motor, an external thread of the screw rod is meshed with an internal thread of the threaded pipe, and the screw rod is fixed on the cutting machine frame.

2. The mower of claim 1, wherein: the transmission assembly further includes:

the driving gear is coaxially fixed with an output shaft of the heightening motor;

and the driven gear is coaxially sleeved on the outer side of the threaded pipe and is connected with the threaded pipe.

3. A lawnmower as claimed in claim 2 wherein: the threaded pipe is connected with the driven gear through a rib plate, the rib plate is located between the threaded pipe and the driven gear, and the plurality of rib plates are arranged at intervals along the circumferential direction of the threaded pipe.

4. The lawnmower of claim 1, wherein: the cutting frame integrated into one piece has first otic placode and second otic placode, first otic placode is located the top of cutting frame lateral wall, the second otic placode is located the bottom of cutting frame lateral wall, just the center of first otic placode and second otic placode is located same straight line, and is used for the installation the lead screw.

5. The lawnmower of claim 4, wherein: one end of the screw rod is fixed with the first lug plate, the other end of the screw rod penetrates through the second lug plate and is in threaded connection with the threaded pipe, and the threaded pipe is located between the first lug plate and the second lug plate.

6. The lawnmower of claim 1, wherein: the housing includes:

a base forming a cavity;

the cover body is movably connected to the base;

the support is fixed on the base and located in the cavity, and the support and the position abutted to the base are arranged in an opening and used for penetrating through the movement of the cutting machine frame.

7. The lawnmower of claim 6, wherein: and a guide mechanism is fixed on the support, is arranged between the support and the cutter frame and is used for guiding the movement direction of the cutter frame.

8. The lawnmower of claim 7, wherein: and a damping mechanism is further fixed on the support and arranged between the support and the cutting machine frame.

9. The mower of claim 8, wherein: the side wall of the cutting machine frame is provided with a mounting groove, and the damping mechanism is fixed in the mounting groove.

10. The mower of claim 6, wherein: the mower further comprises a walking device, the walking device comprises a driving wheel and a driven wheel, the driving wheel is fixed to the rear end of the base, and the driven wheel is fixed to the front end of the base.