CN212367920U

CN212367920U - Grass cutter

Info

Publication number: CN212367920U
Application number: CN202020505725.7U
Authority: CN
Inventors: 山冈敏成; 聂阳
Original assignee: Nanjing Deshuo Industrial Co Ltd
Current assignee: Nanjing Chervon Industry Co Ltd
Priority date: 2020-04-08
Filing date: 2020-04-08
Publication date: 2021-01-19
Anticipated expiration: 2030-04-08

Abstract

The utility model discloses a mower, include: a mowing element drivable to mow; the motor is used for driving the mowing element to rotate around the rotating shaft, and the mowing element forms a rotating surface when being driven; the main machine body is provided with a cavity for accommodating at least part of a mowing element, and the cavity is also provided with a grass discharging port for switching the mower between a grass discharging mode and a grass chopping mode; an operating assembly disposed on the main body; the plug is arranged at the grass discharge port in a replaceable manner; the plug is provided with a stop surface and a guide surface; wherein, the stop surface is vertical to or intersected with the rotating surface and faces to the rotating direction of the mowing element; the stop surface is substantially continuous with the guide surface. This lawn mower garrulous grass is effectual high.

Description

Grass cutter

Technical Field

The utility model relates to a garden class instrument, concretely relates to lawn mower.

Background

The mower is a mechanical tool for trimming lawns, vegetations and the like, and consists of a cutter head, an engine, a traveling wheel, a traveling mechanism, a cutter, a handrail and a control part. The cutter head is arranged on the travelling wheel, the engine is arranged on the cutter head, the cutting knife is arranged on the output shaft of the engine, the cutting knife utilizes the high-speed rotation of the engine to improve a lot of speed, the operation time of weeding workers is saved, and a large amount of manpower resources are reduced.

In the prior art, some lawn mowers have a grass discharging or collecting function. For some lawn mowers with grass discharge function, because the cut grass clippings are directly discharged and when the vegetation is luxuriant, the cut vegetation can not be broken in time due to large volume, thereby causing uneven grass clippings spreading. How to provide a mower capable of improving grass chopping quality and reducing grass falling is a technical problem to be solved urgently by technical personnel in the field.

SUMMERY OF THE UTILITY MODEL

For solving the not enough of prior art, the utility model aims to provide a better lawn mower of garrulous grass effect.

In order to achieve the above object, the utility model adopts the following technical scheme:

a lawn mower, comprising: a mowing element drivable to mow; a motor for driving the mowing element to rotate around the rotating shaft, wherein the mowing element forms a rotating surface when being driven; the main machine body is provided with a cavity for accommodating at least part of a mowing element, and the cavity is also provided with a grass discharging port for switching the mower between a grass discharging mode and a grass chopping mode; the walking assembly is connected to the main machine body; an operating assembly disposed on the main body; the plug is arranged at the grass discharge port in a replaceable manner; the plug is provided with a stop surface and a guide surface; wherein, the stop surface is vertical to or intersected with the rotating surface and faces to the rotating direction of the mowing element; the stop surface is substantially continuous with the guide surface.

Further, the inner wall of the cavity has a curvature, and the guide surface forms a curved surface having a curvature substantially identical to the curvature of the inner wall of the cavity.

Further, the stop surface is smooth and continuous with the guide surface, the stop surface and the guide surface being connected by an arc.

Further, when the plug is arranged at the grass discharge port, the cavity is formed into an irregular cylinder and a gap is formed.

Further, the plug is formed with a plurality of sets of stop surfaces and guide surfaces, the stop surfaces and the guide surfaces being spaced apart.

Further, when the plug is arranged at the grass discharge port, the mower is in a grass chopping mode; when the plug is far away from the grass discharge port, the mower is in a grass discharge mode.

Further, still include: the grass basket cover is arranged at the rear side of the main machine body and is connected to the grass discharge port; a support part which is arranged at the rear side of the main machine body and can support the mower to be stored; the rearmost end of the grass basket cover is a preset distance L1 from the preset position on the main machine body, the supporting part and the walking assembly form a supporting surface, the supporting surface is a preset distance L2 from the preset position on the main machine body, and L1 is smaller than L2.

Further, the difference between L2 and L1 is greater than 0 and equal to or less than 20.

Furthermore, the grass basket cover is provided with an outlet matched with the grass discharge port, and the length of the rearmost end of the outlet from the main machine body is more than or equal to 50mm and less than or equal to 100 mm.

Further, the grass collecting device comprises a grass collecting mode and a grass collecting basket connected to the main machine body, wherein the grass collecting basket is arranged to collect grass scraps discharged from the grass discharge port when the mower is in the grass collecting mode.

The utility model discloses an useful part lies in: the grass cutting element can realize secondary grass cutting in a discontinuous section in the cavity formed by the main machine body by arranging the stop surface, so that the grass cutting effect of the grass cutter is improved, and the rear grass cutting function of the grass cutter is kept.

Drawings

Fig. 1 is a perspective view of a lawnmower in a first embodiment;

FIG. 2 is a perspective view of another perspective of the lawn mower of FIG. 1;

FIG. 3 is a perspective view of the main body-mounted grass basket cover of the lawnmower of FIG. 1;

FIG. 4 is a perspective view of the main body of the mower of FIG. 3 from another perspective, with the basket cover mounted thereto;

FIG. 5 is a perspective view of a main body mounting bulkhead of the mower of FIG. 1;

FIG. 6 is an exploded perspective view of the main body and bulkhead of the mower of FIG. 5;

fig. 7 is a perspective view of a bulkhead of the mower of fig. 6.

Detailed Description

The lawn mower 100 shown in fig. 1 can be manually operated by a user to trim lawn, vegetation, etc. The lawn mower 100 includes: a main body 11, a walking assembly 12, an operating assembly 13, a power supply device (not shown), and the like. The main body 11 is used for mounting the traveling assembly 12, the operation assembly 13 and the power supply device. The main body 11 extends at least partially along a first line 101 parallel to the front-rear direction, and the above-mentioned components and devices are distributed reasonably to various parts of the main body 11.

In one implementation, the lawn mower 100 includes a grass-collecting mode, a rear grass mode, and a grass-chopping mode. As shown in fig. 2 to 5, the lawn mower 100 includes a grass basket cover 14, a plug 15 and a grass collecting basket 16, when the lawn mower 100 is in the grass collecting mode, the plug 15 is detached, the grass collecting basket 16 is mounted on the lawn mower 100, and grass clippings cut by the lawn mower 100 can be collected by the grass collecting basket 16. When the lawn mower 100 is in the rear grass discharge mode, the grass basket cover 14 is mounted to the lawn mower 100, and grass clippings cut by the lawn mower 100 can be guided to the rear side of the lawn mower 100 by the grass basket cover 14 and discharged. When the mower 100 is in the grass chopping mode, the plug 15 is mounted on the mower 100, the grass collecting basket 16 is detached, and grass clippings cut by the mower 100 can be directly thrown. In fact, the mower 100 also comprises an operating condition, which can be operated by the operator, and a storage condition, which can be stored. For the clear explanation of the technical solution of the present invention, the following is also defined as shown in fig. 1: front, back, left, right, upper and lower sides. As shown in fig. 2, when the lawn mower 100 is in the storage state, the operating unit 13 is configured to rotate to at least partially overlap with the main body 11. At this time, the front-rear direction of the entire mower 100 is set to be placed in the up-down direction. It is understood that the main body 11 is further provided with a supporting portion 111 engaged with the walking assembly 12. The support portion 111 constitutes a support assembly together with the running assembly 12 that enables the mower 100 to be held in the stored state.

As shown in fig. 2 to 4, when the lawn mower 100 is in the storage state and the basket cover 14 is mounted on the main body 11, in order to avoid the influence of the basket cover 14 on the storage state of the lawn mower 100, i.e. to avoid the interference of the basket cover 14 with the supporting portion 111 or the traveling assembly 12 when the basket cover 14 is mounted on the main body 11, when the basket cover 14 is required to be mounted on the main body 11, a predetermined distance L1 is provided between the rearmost end of the basket cover 14 and a predetermined position on the main body 11, and a predetermined distance L2 is provided between the supporting surface 102 and a predetermined position on the main body 11 on a supporting surface 102 away from the main body 11 and connecting the supporting portion 111 and the traveling assembly 12. Wherein L1 is less than L2. As one implementation, the difference between L2 and L1 is greater than 0. In some preferred embodiments, the difference between L2 and L1 is greater than 0 and equal to or less than 20. At this time, when the grass basket cover 14 is attached to the main body 11, the grass basket cover 14 does not interfere with the support portion 111 or the traveling unit 12 in the stored state of the lawnmower 100. Namely, the basket cover 14 is not pressed or worn by the weight of the mower 100, and the reliability of the basket cover 14 is ensured. Through such a design, can guarantee that lawn mower 100 can possess the back row grass function simultaneously can remain upright again and accomodate the function. In addition, through such a design, the grass basket cover 14 can keep a larger outlet, so that the grass mower 100 can discharge grass in time, and the situation of grass blockage or grass blockage can not occur. In fact, in the present embodiment, the opening 141 of the basket cover 14 is provided with a predetermined length H, which is the closest distance from the rearmost end of the basket cover 14 to the main body 11. As one realization mode, H is more than or equal to 50mm and less than or equal to 100mm, thereby increasing the grass discharging effect to a greater extent on the premise of increasing the size of the whole mower 100.

As shown in fig. 5-7, the mower 100 further includes a power take-off assembly 17. The power output assembly 17 is mounted to the main body 11 and includes an output member for outputting power to perform a mowing function, which may be embodied as a mowing element 171 in the present embodiment, and a motor 172. Motor 172 drives rotation of mowing element 171 to cut vegetation. The main body 11 is formed with a receiving space for receiving at least a part of the motor 172 and a part of the grass cutting member 171. More specifically, the portion of main body 11 for receiving mowing element 171 is formed as a cylindrical housing 112. Mowing element 171 is free to rotate within housing 112 and defines a rotating surface 102. Power take-off assembly 17 may include more than one mowing element 171 and, correspondingly, the number of motors 172 may correspond to the number of mowing elements 171. In one specific embodiment, the motor 172 is an electric motor. It can be understood that the main body 11 is formed with a grass discharge opening 113 for switching the mower 100 between the grass chopping mode, the rear grass discharge mode and the grass collecting mode. When the mower 100 is in the grass cutting mode, the plug 15 is mounted on the grass discharge port 113, and rear grass discharge or grass collection cannot be performed. As one way to achieve this, when the mowing element 171 rotates at a high speed and mows grass, grass clippings are cut and simultaneously carried by the mowing element 171 and can be thrown out. When the grass clippings are carried by the grass cutting element 171, a portion of the grass clippings can be cut into pieces by a secondary cut or multiple cuts. At the moment, the grass scraps can be uniformly scattered on the grass land when being thrown out, so that the grass body is conveniently decomposed. In fact, during the high-speed rotation of the grass cutting element 171, the airflow in the cavity 112 can be driven to rotate at a high speed, and a negative pressure cavity slightly lower than the atmospheric pressure can be formed, so that grass clippings can be attracted and driven to rotate in the cavity 112 without immediately falling to the ground. When the grass clippings rotate to the position of the plug 15, the plug 15 is not uniform and has a certain seam with the main machine body 11, so that the area where the plug 15 is located is not continuous, and the flowing gas in the cavity 112 can have a discontinuous section at the position of the plug 15, thereby generating a certain turbulent flow or gap and leading the grass clippings to fall off. When the mower 100 is adjusted to a larger cutting depth or encounters dense vegetation, the grass clippings cut by the mowing element 171 fall more in the area of the plug 15 due to the longer length or heavier weight, and cannot be cut for the second time, resulting in uneven spreading of the grass clippings.

As shown in fig. 6 to 7, the plug 15 is provided with a stop surface 151 extending substantially in the up-down direction and a guide surface 152 connected to the stop surface 151. Wherein the stop surface 151 and the guide surface 152 are substantially continuous. It should be noted here that the straight lines of the stop surfaces 151 in the up-down direction intersect or are parallel, and are not limited to extending completely in the up-down direction. In fact, stop surface 151 intersects, perpendicularly or obliquely, rotation surface 102 formed by mowing element 171. And the connection between the stop surface 151 and the guide surface 152 is connected by an arc-shaped section at one end, so that grass clippings at the stop surface 151 cannot cross the stop surface 151 and fall directly at the stop surface 151. The guiding surface 152 is formed with an arc surface which is substantially consistent with the arc surface of the inner part of the cavity 112, so that grass clippings can be more conveniently guided to enter the cavity 112 from the stopping surface 151, and the phenomenon that the grass clippings drop in the guiding process due to the fact that a discontinuous surface occurs in the transition stage is avoided. It will be appreciated that when the grass cutting element 171 is rotated at high speed in the housing 112 formed by the main body 11, a negative pressure chamber is formed and can bring the grass clippings into rotation. Due to the presence of the plug 15, a discontinuous section of the cavity 112 exists. However, the discontinuous section causes the rotation of the portion of grass clippings in the cavity 112 to be in a random pattern. By providing the stop surface 151, the discontinuity of the discontinuous section is strengthened, so that the grass clippings are directly stopped at the section where the stopper 15 is located. So that the grass clippings are stopped by the stop surface 151 in a periodic stagnation, which is regular and ensures that the grass cutting element 171 can effectively perform a secondary cutting in the zone where the stop surface 151 is located. When the grass clippings on the stop surface 151 are cut twice by the grass cutting element 171, the grass clippings can be carried by the grass cutting element 171 to pass over the stop surface 151 and enter the rotating airflow of the cavity 112 again under the guiding action of the guide surface 152, enter the next rotation period, and are cut again when the grass clippings pass through the stop surface 151 again until the grass clippings fall after being cut.

It is to be understood that the above stop surface 151 and guide surface 152 are not limited to one set, and a plurality of sets of the stop surface 151 and guide surface 152 may be provided. The stop surfaces 151 and the guide surfaces 152 are spaced at intervals, so that grass clippings can be cut in batches or multiple times at the plug 15, and the grass chopping effect is further enhanced.

The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It should be understood by those skilled in the art that the above embodiments do not limit the present invention in any way, and all technical solutions obtained by adopting equivalent replacement or equivalent transformation fall within the protection scope of the present invention.

Claims

1. A lawn mower, comprising:

a mowing element drivable to mow;

a motor for driving the mowing element to rotate around a rotating shaft, wherein the mowing element forms a rotating surface when being driven;

the main machine body is provided with a cavity for accommodating at least part of the mowing element, and the cavity is also provided with a grass discharging port for switching the mower between a grass discharging mode and a grass chopping mode;

a walking assembly connected to the main body;

an operating assembly disposed on the main body;

the plug is arranged at the grass discharge port in a replaceable manner;

the method is characterized in that:

the plug is provided with a stop surface and a guide surface; wherein the stop surface is perpendicular to or intersects the rotation surface and faces the rotation direction of the mowing element; the stop surface is substantially continuous with the guide surface.

2. The mower of claim 1,

the inner wall of the cavity has a curvature, and the guide surface forms an arc surface having a curvature substantially the same as the curvature of the inner wall of the cavity.

3. The mower of claim 1,

the stop surface is smooth and continuous with the guide surface, and the stop surface and the guide surface are connected through an arc section.

4. The mower of claim 1,

when the plug is arranged at the grass discharge port, the cavity is formed into an irregular cylinder and a gap is formed.

5. The mower of claim 1,

the plug is provided with a plurality of groups of stop surfaces and guide surfaces, and the stop surfaces and the guide surfaces are arranged at intervals.

6. The mower of claim 1,

when the plug is arranged at the grass discharge port, the mower is in the grass chopping mode;

when the plug is far away from the grass discharge opening, the mower is in the grass discharge mode.

7. The mower of claim 1,

further comprising:

the grass basket cover is arranged at the rear side of the main machine body and is connected to the grass discharge port;

a support part which is arranged at the rear side of the main body and can support the mower to be stored;

the rearmost end of the grass basket cover is a preset distance L1 away from the preset position on the main body, the supporting part and the walking assembly form a supporting surface, the supporting surface is a preset distance L2 away from the preset position on the main body, and L1 is smaller than L2.

8. The mower of claim 7,

the difference between L2 and L1 is greater than 0 and less than or equal to 20.

9. The mower of claim 7,

the grass basket cover is provided with an outlet matched with the grass discharge port, and the rearmost end distance of the outlet is greater than or equal to 50mm and less than or equal to 100mm of the length of the main machine body.

10. The mower of claim 1,

the grass collecting basket is connected to the main machine body and is arranged to collect grass clippings discharged from the grass discharge port when the mower is in the grass collecting mode.