CN110089259B

CN110089259B - Grass cutter

Info

Publication number: CN110089259B
Application number: CN201810084267.1A
Authority: CN
Inventors: 严语
Original assignee: Nanjing Deshuo Industrial Co Ltd
Current assignee: Nanjing Chervon Industry Co Ltd
Priority date: 2018-01-29
Filing date: 2018-01-29
Publication date: 2020-09-08
Anticipated expiration: 2038-01-29
Also published as: CN110089259A

Abstract

The invention discloses a mower which comprises a working head and a handle, wherein the working head comprises a shell, a driving device and an output shaft, wherein the driving device and the output shaft are arranged in the shell; the mower also comprises a cutter and an air volume adjusting assembly which is arranged on the output shaft and is positioned above the cutter and used for forming grass suction airflow, wherein the air volume adjusting assembly comprises a connecting rod, an angle adjusting piece, a return element and a flap; the connecting rod is vertically connected to the output shaft, and the angle adjusting piece is fixedly arranged on the connecting rod and provided with a surface; the restoring element is arranged at the tail end of the connecting rod; the flap is arranged between the angle adjusting piece and the restoring element and can slide along the length direction of the connecting rod, the flap can abut against different positions of the surface of the angle adjusting piece under the action of the restoring element, and the surface is configured to enable the flap to abut against different positions of the surface and the pitch angle of the flap to be different. The mower can adjust the rotating speed and the air volume under different working conditions, and can save energy and prolong the service life of the mower.

Description

Grass cutter

Technical Field

The invention relates to the technical field of plant cutting, in particular to a mower.

Background

Mowers are also known as weed trimmers, lawnmowers, lawn trimmers, and the like. The mower is a mechanical tool for trimming lawn and vegetation, and is composed of cutter head, engine, walking wheel, walking mechanism, cutter, handle and control unit. The cutter on the mower rotates quickly, so that the mowing efficiency is improved, and a large amount of manpower resources are reduced.

When the mower is used, two working states are provided, one is a grass chopping state, and the other is a grass collecting state. In the grass chopping state, the wind power blades synchronously rotating with the cutter are arranged to form airflow during rotation, and the grass is erected under the action of the airflow, so that the cutter effectively cuts the grass; when the grass is collected, the cut grass scraps are sucked up under the action of the air flow and collected in a specific container, such as a grass collecting box. When grass is chopped, the cutter needs to be kept at a high rotating speed, so that the grass chopping efficiency is improved, but the air quantity required during grass chopping is small, and the grass only needs to be kept upright; when grass is collected, the grass is mainly sucked up through the action of wind, so that a large air quantity is needed, and the cutter is rotated at a low speed for energy conservation. And the amount of wind is big when cutter rotational speed is high among the prior art lawn mower, and the amount of wind is little when the cutter rotational speed is low, consequently in order to compromise two kinds of operating modes, the system is under higher energy consumption state always, causes the waste on the one hand, and on the other hand is unfavorable for the maintenance to each part of lawn mower to the life-span of lawn mower has been shortened.

Based on the above problems, there is a need for a lawn mower, which can adjust the rotation speed and the air volume under different working conditions, so as to save energy and achieve a longer service life.

Disclosure of Invention

The invention aims to provide a mower, which aims to solve the problems that in the prior art, the rotating speed and the air volume of the mower can not be adjusted according to the working condition, so that energy is wasted and the service life of the mower is shortened.

In order to achieve the purpose, the invention adopts the following technical scheme:

a mower comprises a working head and a handle, wherein the working head comprises a shell, a driving device and an output shaft, wherein the driving device and the output shaft are arranged in the shell; the lawn mower further comprises:

the cutter is vertically arranged on the output shaft and is used for rotary mowing;

the air volume adjusting assembly is arranged on the output shaft, is positioned above the cutter and is used for forming straw sucking airflow; the air volume adjusting assembly comprises:

the connecting rod is vertically arranged on the output shaft;

an angle adjusting member fixedly disposed on the connecting rod and having a surface;

the restoring element is arranged at the tail end of the connecting rod;

the flap is arranged between the angle adjusting piece and the restoring element and can slide along the length direction of the connecting rod, the flap can press different positions of the surface of the angle adjusting piece under the action of the restoring element, and the surface is configured to enable the pitch angle of the flap to be different when the flap presses different positions of the surface.

As a preferable mode of the above mower, the angle adjusting member includes a fixing portion fixed to the connecting rod and an angle adjusting portion provided with the surface.

As a preferable scheme of the lawn mower, the surface is a curved surface, and the curved surface is formed by a plurality of straight lines which are arranged along the length direction of the connecting rod and have different included angles with a horizontal plane.

In a preferable embodiment of the mower, an angle between the straight line constituting the curved surface and the horizontal plane decreases as the distance between the straight line and the output shaft increases.

As a preferable mode of the above mower, the angle adjusting portion is located above or below the flap.

As a preferable scheme of the mower, the flap is slidably sleeved on the connecting rod.

As a preferable scheme of the mower, the connecting rod comprises a first rod and a second rod, the axes of the first rod and the second rod are coincident, one end of the first rod is connected with the output shaft, and the other end of the first rod is connected with the second rod; the second rod is cylindrical, and the flap is disposed on the second rod.

As a preferable embodiment of the lawn mower, a stop is disposed at a distal end of the second rod away from the first rod, and the return element is a spring sleeved on the second rod and located between the stop and the flap.

In a preferred embodiment of the mower, the first rod has a wing-shaped cross section.

As a preferable mode of the lawn mower, the number of the connecting rods is at least two, and the connecting rods are uniformly distributed along the circumferential direction of the output shaft.

The invention has the beneficial effects that:

the mower provided by the invention is provided with the air volume adjusting assembly used for forming grass suction airflow, the air volume adjusting assembly comprises a connecting rod vertically connected to an output shaft, an angle adjusting part and a restoring element are arranged on the connecting rod, and when the flap is arranged between the angle adjusting part and the restoring element and is pressed on the angle adjusting part through the restoring element, and the flap is pressed on different positions of the surface of the angle adjusting part, the pitch angle of the flap changes. Through the rotational speed of adjustment output shaft, can make flap compression reply component along the length direction reciprocating motion of connecting rod under the effect of different centrifugal forces, can realize adjusting the amount of wind of lawn mower through the regulation rotational speed to make the lawn mower under the operating condition of difference, the homoenergetic reaches the most suitable operating condition, can enough realize corresponding function, can also reduce energy consumption, avoids the excessive consumption of lawn mower part, can prolong the life of lawn mower.

Drawings

FIG. 1 is a bottom view of a lawn mower provided in accordance with an embodiment of the present invention;

FIG. 2 is a cross-sectional view taken along line A-A of FIG. 1;

FIG. 3 is an enlarged view of a portion of FIG. 2 at B;

FIG. 4 is a schematic view showing the construction of an air volume adjusting unit according to the present invention;

FIG. 5 is a schematic view of the angle adjusting member of the present invention;

FIG. 6 is a front view of FIG. 5;

fig. 7 is a left side view of fig. 5.

Wherein, 1, a working head; 2. a handle; 3. a traveling wheel; 4. a cutter; 5. an air volume adjusting component;

11. a housing; 12. a drive device; 13. an output shaft;

51. a connecting rod; 52. a flap; 53. an angle adjusting member; 54. a restoring element;

511. a first lever; 512. a second lever; 5121. a stopper;

531. a fixed part; 532. an angle adjusting section; 5321. a surface.

Detailed Description

The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.

As shown in fig. 1 and 2, the mower comprises a working head 1 and a handle 2, wherein the working head 1 comprises a shell 11, a driving device 12 and an output shaft 13 which are arranged in the shell 11, a travelling wheel 3 is arranged below the working head 1, and the handle 2 is connected to the shell 11. When mowing, an operator pushes the handle 2 to control the walking route of the walking wheel 3 of the mower. The mower base has a cutting device comprising a cutter blade 4 for rotary cutting of vegetation at the base of the mower.

As shown in fig. 2, which is a cross-sectional view taken along the line a-a in fig. 1. The housing 11 is provided with a drive device 12 and an output shaft 13. Wherein, the driving device 12 drives the output shaft 13 to rotate, and the cutter 4 is vertically connected on the output shaft 13 and rotates along with the output shaft 13. The driving device 12 can be selected according to actual conditions, and can be a diesel engine, a gasoline engine, an electric motor and the like.

The mower has two working states: grass chopping mode and grass collecting mode. In the grass chopping mode, the wind power blades synchronously rotating with the cutters 4 rotate to form airflow, and grass is erected under the action of the airflow; in the grass collecting mode, the cut grass clippings are sucked up by the action of the air flow and collected in a special container, such as a grass collecting box. However, in the grass chopping mode, the cutter 4 needs to be kept rotating at a high speed to improve the grass chopping efficiency, and meanwhile, the required air volume is small, and the grass only needs to be kept upright; in the grass collecting mode, a large air volume is needed to suck away the grass clippings, and the cutter 4 is rotated at a low speed for saving energy.

In order to realize that the cutter 4 has small airflow when rotating at high speed and can have small rotating speed when having large airflow, the invention provides an air quantity adjusting component 5. Referring to fig. 3, an enlarged view at B in fig. 2 is shown. As shown in fig. 2 and 3, an air volume adjusting assembly 5 is further disposed above the cutter 4. The air volume adjusting assembly 5 includes a connecting rod 51, a flap 52, an angle adjuster 53, and a return member 54. Wherein the connecting rod 51 is vertically connected to the output shaft 13 and can rotate with the output shaft 13. The flap 52 is slidably provided on the connecting rod 51 and is slidable in the longitudinal direction of the connecting rod 51. The angle adjusting piece 53 is fixed to the connecting rod 51. The flap 52 can be pressed against the angle adjustment 53 by the return element 54. The angle adjustment piece 53 has a surface 5321 (see fig. 5-7), which surface 5321 can be pressed against the side of the flap 52 for adjusting the pitch angle of the flap 52 in different positions of the connecting rod 51, the pitch angle of the flap 52 being the angle of the airfoil chord of the flap 52 to the plane of rotation. A return element 54 is provided at the end of the connecting rod 51, the return element 54 exerting a force on the flap 52 towards the angle adjustment 53. The angular adjustment 53 and the return element 54 cooperate to limit the range of movement of the flap 52 on the connecting rod 51.

Referring to fig. 3 and 4, the connection rod 51 includes a first rod 511 and a second rod 512 connected to each other. The first lever 511 has one end connected to the output shaft 13 and the other end connected to the second lever 512. Specifically, the first rod 511 has an airfoil-shaped cross section, so that the wind resistance during rotation is reduced, and energy is saved. The cross section of the second rod 512 is cylindrical, and the flap 52 is sleeved on the second rod 512 and can slide on the second rod 512, so that the flap 52 can smoothly slide on the connecting rod 51, and the flap 52 is prevented from being locked.

In other embodiments, the connecting rod 51 may be a rod having a single cylindrical shape as a whole, but may have other structural shapes.

The angle adjusting piece 53 is arranged on the connecting rod 51 and can rotate along with the connecting rod 51 during rotation to directly limit the flap 52. The friction between the angle adjustment member 53 and the flap 52 can be reduced relative to the case where the angle adjustment member 53 is fixed to the housing. Referring to fig. 5, in the present embodiment, the angle adjusting member 53 includes a fixing portion 531 and an angle adjusting portion 532, wherein the fixing portion 531 is fixed to the connecting rod 51, and the angle adjusting portion 532 is in contact fit with the flap 52. The angle-adjusting portion 532 includes a surface 5321, and the surface 5321 is a curved surface in contact with the flap 52, and the curved surface is formed by a plurality of straight lines arranged in the length direction of the connecting rod 51 and having different included angles from the horizontal plane. Thus, when the output shaft 13 rotates, the angle of pitch of the flap 52 is different when the side of the flap 52 is brought into contact with a different position of the surface 5321 by the combined action of the centrifugal force and the restoring force of the restoring element 54.

Specifically, as shown in fig. 4 to 7, the farther the straight line of the angle adjusting member 53 constituting the curved surface is from the output shaft 13, the smaller the angle of the straight line from the horizontal plane. That is, when the rotational speed of the output shaft 13 increases, the centrifugal force applied to the flap 52 increases, the flap 52 moves toward the return element 54, the pitch angle of the flap 52 decreases, and the air volume formed by the flap 52 decreases, and this lawnmower can improve mowing efficiency by high-speed operation, and can save energy by adjusting the pitch angle of the flap 52 to decrease the air volume; when the rotating speed of the output shaft 13 is reduced, the centrifugal force applied to the flap 52 is reduced, the flap 52 moves towards the side of the output shaft 13, the pitch angle of the flap 52 is increased, the air volume formed by the flap 52 is increased, and the rotating speed of the output shaft 13 is reduced while the flap has large air volume so as to collect grass clippings. The surface 5321 is configured such that the angle of pitch of the flap 52, which bears against the surface 5321, increases or decreases gradually during the reciprocating movement.

As shown in fig. 4, two or more connecting rods 51 may be provided, and the connecting rods 51 are uniformly distributed along the circumferential direction of the output shaft 13, so that the lawn mower can generate uniform wind, and when grass is broken or collected, all passing parts of the lawn mower can achieve the same processing effect, so that the lawn mower can cut ornamental lawns such as lawns uniformly and consistently, and has good ornamental value.

Wherein, the end of the second rod 512 away from the first rod 511 is provided with a stop 5121, and the return element 54 is a spring, which is sleeved on the second rod 512 and is located between the stop 5121 and the flap 52.

In this embodiment, the specific process of the mower during operation is as follows:

when grass chopping is needed, the output shaft 13 has high rotating speed under the action of the driving device 12 so as to realize high-speed rotation of the cutter, and therefore cutting efficiency is improved, the connecting rod 51 arranged on the output shaft 13 also rotates at high speed along with the output shaft 13, the flap 52 on the connecting rod 51 is subjected to high centrifugal force under the high-speed rotation, so that the flap 52 compresses the return element 54 and moves to one end far away from the output shaft 13, meanwhile, the contact position of the flap 52 and the surface 5321 is changed, the pitch angle of the flap 52 is reduced along with the change of the slope of the straight line on the surface 5321, and therefore the air volume formed by the flap 52 in the high-speed rotation process is reduced, and the grass to be cut can be kept in a vertical state due to small air volume, and therefore, the grass chopping process can not only guarantee grass.

When grass collection is needed, a large air volume is needed to collect grass clippings, but the requirement on the rotating speed of the output shaft 13 is not high, so that the rotating speed of the output shaft 13 is low, the flap 52 moves towards one end close to the output shaft 13 under the action of the return element 54, meanwhile, the contact position of the flap 52 and the surface 5321 is changed, the pitch angle of the flap 52 is increased along with the change of the slope of the straight line on the surface 5321, and therefore the flap 52 can form a large air volume in the rotating process, and the grass clippings are sucked and collected in a specific container, such as a grass collection box. Although the rotating speed of the output shaft 13 is reduced in the process, the air volume is large, and the grass scraps can be sucked and collected.

Under the two working states, the mower can reach the most suitable working state, can realize corresponding functions, can reduce energy consumption, avoids excessive consumption of mower parts, and can prolong the service life of the mower.

Note that the above is only a preferred embodiment of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A mower comprises a working head and a handle, wherein the working head comprises a shell, a driving device and an output shaft, wherein the driving device and the output shaft are arranged in the shell; characterized in that, the lawn mower still includes:

the air volume adjusting assembly is arranged on the output shaft, is positioned above the cutter and is used for forming straw sucking airflow;

the air volume adjusting assembly comprises:

the connecting rod is vertically arranged on the output shaft;

the restoring element is arranged at the tail end of the connecting rod;

the flap is arranged between the angle adjusting piece and the restoring element and can slide along the length direction of the connecting rod, the flap can press different positions of the surface of the angle adjusting piece under the action of the restoring element, and the surface is configured to ensure that the flap has different pitch angles when pressed against different positions of the surface.

2. The mower of claim 1, wherein the angle adjuster includes a fixed portion fixed to the connecting rod and an angle adjuster having the surface disposed thereon.

3. The mower of claim 2 wherein said surface is a curved surface comprising a plurality of straight lines extending along the length of said connecting rod at different angles to the horizontal.

4. A lawnmower according to claim 3, wherein the further the distance between the line forming the curved surface and the output shaft, the smaller the angle the line makes with the horizontal.

5. A lawnmower as claimed in claim 2, wherein the angle adjustment is located above or below the flap.

6. A lawnmower as claimed in any one of claims 1 to 5, wherein the flap is slidably mounted on the connecting bar.

7. A lawnmower as claimed in claim 6, wherein the connecting rod comprises first and second rods having coincident axes, the first rod being connected at one end to the output shaft and at the other end to the second rod; the second rod is cylindrical, and the flap is disposed on the second rod.

8. A lawnmower as claimed in claim 7, wherein the end of the second lever remote from the first lever is provided with a stop and the return element is a spring which is fitted over the second lever between the stop and the flap.

9. A lawnmower as claimed in claim 7 or claim 8, wherein the first bar is aerofoil shaped in cross-section.

10. The mower of claim 1, wherein the number of said connecting rods is at least two, and said connecting rods are evenly distributed along a circumference of said output shaft.