WO2024065442A1

WO2024065442A1 - Automatic pay-off grass-trimming device

Info

Publication number: WO2024065442A1
Application number: PCT/CN2022/122776
Authority: WO
Inventors: 王杰
Original assignee: 河森堡(深圳)科技有限公司
Priority date: 2022-09-27
Filing date: 2022-09-29
Publication date: 2024-04-04
Also published as: CN115486257A

Abstract

Disclosed in the present invention is an automatic pay-off grass-trimming device, comprising a framework and a bottom cover. An electric motor fixing block is fixedly connected to an upper surface of the framework. A grass trimming electric motor is mounted on a lower surface of the electric motor fixing block by means of a flange and screws. In the automatic pay-off grass-trimming device, by means of the arrangement of a pay-off electric motor, a cam, a reset spring, a magnet and a sensor plate, when the grass trimming electric motor rotates, a grass trimming line extends outwards due to the centrifugal force of same, so as to drive a spool to rotate relative to a grass trimming transmission member. After the spool rotates to a certain angle, limiting mechanisms between the spool and the bottom cover come into contact with each other. After the pay-off electric motor rotates by one rotation, the cam instantly rotates from the lowest position to the highest position, so as to be disengaged from a sliding block. Under the effect of a push rod reset spring, a push rod and the sliding block return to the highest position, such that the push rod is disengaged from the spool so as to make the electric motor stop rotating and finish pay-off work, thereby facilitating the improvement of the automatic operation and efficiency of an apparatus.

Description

Automatic line-laying and grass-cutting device

Technical Field

The invention relates to the technical field of grass trimming devices, and in particular to an automatic line-laying grass trimming device.

Background technique

In the existing garden mowing equipment, due to the influence of terrain and vegetation, it is not suitable to use a mowing device in many cases. Instead, a mowing device with a flexible plastic rope as a cutting tool is used. During the operation of the mowing equipment, the mowing rope will break after a period of use due to long-term friction and impact with the ground, corners, stones and other objects. In order to continue to use the mowing device, most of the mowing equipment on the market uses manual replacement of the mowing rope, or uses a longer wound mowing rope, manually knocks the ground, and uses centrifugal force to cause relative rotation between the winding drum and the rotating disk, thereby semi-automatically paying out the line, so that the mowing rope is extended outward to pay out the line.

After searching, the Chinese patent application number CN202220056825.5 discloses an electric lawn mower, including a driving motor controlled by a handle, the driving motor is powered by a battery, the battery is located above the frame where the driving motor is located, and the frame is also equipped with walking wheels. The driving motor drives a power output shaft, and the end of the power output shaft is connected to a lawn mower head driven by it, and the lawn mower head is located below the protective cover. The lawn mower head includes an outer shell, and a pay-off wheel is arranged inside the outer shell. This patent also has the following shortcomings: 1. It cannot perform fully automatic pay-off work; 2. Manual auxiliary work is required; 3. It is not conducive to the automation of equipment and the improvement of efficiency; 4. It wastes human resources.

Summary of the invention

The main purpose of the present invention is to provide an automatic line-laying and grass-cutting device, which can effectively solve the problems in the background technology.

To achieve the above object, the technical solution adopted by the present invention is:

An automatic line-releasing grass-cutting device comprises a frame and a bottom cover, wherein the upper surface of the frame is fixedly connected to a motor fixing block, and the lower surface of the motor fixing block is provided with a grass-cutting motor installed via a flange and screws, and the outer surface of the threaded shaft of the grass-cutting motor is fixedly connected to a grass-cutting transmission part, and the bottom cover is fixedly connected to the threaded shaft of the grass-cutting motor via a cylinder nut, and the interior of the bottom cover is slidably connected to a winding drum; a return spring is clamped between the bottom cover and the winding drum, and a grass-cutting rope is overlapped on the outer surface of the winding drum, and the grass-cutting transmission part and one side of the winding drum are fixedly connected with mutually meshing teeth.

In order to achieve the function of rotation, as an automatic line-laying and grass-cutting device of the present invention, a line-laying motor is installed on the upper surface of the motor fixing block, and a cam is fixedly connected to the output end of the line-laying motor.

In order to achieve a guiding effect, as an automatic line-laying and grass-cutting device of the present invention, a guide groove is opened on one side of the upper surface of the motor fixing block, one end of the guide groove penetrates the upper surface of the motor fixing block and extends to the interior of the frame, the number of the guide grooves is two, and the upper surface of the frame is fixedly connected to a shell.

In order to achieve the purpose of sliding, as an automatic line-laying and grass-cutting device of the present invention, a sliding block is slidably connected inside the guide groove, and a push rod is fixedly connected to the lower surface of the sliding block.

In order to achieve a reset function, as an automatic line-laying and grass-cutting device of the present invention, the inner bottom wall of the guide groove is connected with a push rod reset spring, and the push rod reset spring is sleeved on the bottom end of the push rod.

In order to achieve an adsorption effect, as an automatic line-laying and grass-cutting device of the present invention, a magnet is fixedly connected to one side of the sliding block.

In order to achieve the purpose of induction, as an automatic line-laying and grass-cutting device of the present invention, a sensor plate is fixedly connected to one side of the upper surface of the motor fixing block, and the position of the sensor plate corresponds to the magnet.

In order to have a limiting function, as an automatic line-laying and grass-cutting device of the present invention, the inner bottom wall of the bottom cover is fixedly connected to a limiting mechanism, and the limiting mechanism is located between the bottom cover and the winding drum.

Compared with the prior art, the present invention has the following beneficial effects:

1. In the present invention, through the arrangement of the motor fixing block, the bottom cover, the mowing motor, the wire winding drum and the mowing transmission member, before the line-release work, the mowing motor performs a rotating motion to drive the mowing transmission member to rotate, and the mowing transmission member has teeth meshing with the wire winding drum, thereby driving the wire winding drum to rotate, and the mowing transmission member is assembled with the bottom cover, thereby also driving the bottom cover to rotate, so that the mowing rope can rotate and perform the mowing operation; during the line-release work, the line-release motor on the line-release power mechanism rotates, driving the cam installed on the line-release motor to rotate, and the cam and the slider contact each other, so that the slider moves downward under the action of the guide grooves on both sides of the motor fixing block, thereby driving the push rod on the slider to move downward, and the push rod pushes the wire winding drum downward during the downward movement, so that the wire winding drum is out of meshing with the mowing transmission member, and when the mowing motor rotates, due to the centrifugal force of the mowing rope, the mowing rope extends outward, thereby achieving the effect of automatic line release, greatly saving human resources.

2. In the present invention, through the arrangement of the pay-off motor, cam, reset spring, magnet and sensor plate, when the mowing motor rotates, the centrifugal force of the mowing rope causes the mowing rope to extend outward, thereby driving the winding drum and the mowing transmission member to rotate relative to each other. After rotating at a certain angle, the limiting mechanisms between the winding drum and the bottom cover contact each other. After the pay-off motor rotates one circle, the cam instantly rotates from the lowest position to the highest position and disengages from the slider. Under the action of the push rod reset spring, the push rod and the slider return to the highest position, thereby disengaging the push rod from the winding drum. Under the elastic force of the reset spring, the winding drum returns to the highest position and meshes with the mowing transmission member. A magnet is installed on the slider, and the position of the slider is sensed by the sensor plate installed on the motor fixing block, thereby stopping the motor from rotating and completing the pay-off work. This is beneficial to the automated operation of the equipment and the improvement of efficiency, and avoids the trouble of manual pay-off.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic structural isometric view of an automatic line-laying and grass-cutting device according to the present invention;

FIG2 is a schematic structural diagram of an automatic line-laying and grass-cutting device of the present invention with the outer shell removed;

FIG3 is a schematic diagram of the exploded structure of an automatic line-laying and grass-cutting device according to the present invention with the outer shell and the bottom cover removed;

FIG4 is a schematic diagram of an exploded view of an automatic line-laying and grass-cutting device of the present invention with the outer shell removed;

FIG5 is a schematic cross-sectional view of an automatic line-laying and grass-cutting device according to the present invention when the line-laying operation is not performed;

FIG6 is a schematic cross-sectional view of the automatic line-laying and grass-cutting device of the present invention when the line-laying operation is not performed;

FIG7 is a schematic cross-sectional view of an automatic line-laying and grass-cutting device according to the present invention during a line-laying operation;

FIG8 is a schematic cross-sectional structure diagram of an automatic line-laying and grass-cutting device of the present invention during line-laying operation from another perspective.

In the figure: 101, pay-off motor; 103, cam; 001, housing; 201, slider; 202, push rod; 203, push rod reset spring; 002, frame; 301, sensor plate; 302, magnet; 003, bottom cover; 401, cylinder nut; 004, motor fixing block; 005, winding reel; 006, mowing motor; 007, mowing transmission part; 008, reset spring; 009, mowing rope.

Detailed ways

The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

As shown in Fig. 1-8, an automatic line-laying grass-cutting device comprises a frame 002 and a bottom cover 003, the upper surface of the frame 002 is fixedly connected with a motor fixing block 004, the lower surface of the motor fixing block 004 is mounted with a grass-cutting motor 006 via a flange and screws, the outer surface of the threaded shaft of the grass-cutting motor 006 is fixedly connected with a grass-cutting transmission member 007, the bottom cover 003 is fixedly connected to the threaded shaft of the grass-cutting motor 006 via a cylinder nut 401, and the interior of the bottom cover 003 is slidably connected with a wire winding reel 005;

In this embodiment, a return spring 008 is clamped between the bottom cover 003 and the winding drum 005, a mowing rope 009 is overlapped on the outer surface of the winding drum 005, and the mowing transmission part 007 and one side of the winding drum 005 are fixedly connected with mutually meshing teeth.

In specific use, before the line is released, the mowing motor 006 rotates to drive the mowing transmission member 007 to rotate, and the mowing transmission member 007 has teeth that mesh with the winding disk 005. The wire winding drum 005 is driven to rotate, and the grass cutting transmission member 007 is assembled with the bottom cover 003, thereby also driving the bottom cover 003 to rotate, so that the grass cutting rope 009 is rotated to cut grass; when the wire is released, the wire-release motor 101 on the wire-release power mechanism rotates, driving the cam 103 installed on the wire-release motor 101 to rotate, and the cam 103 and the slider 201 contact each other, so that the slider 201 moves downward under the action of the guide grooves on both sides of the motor fixing block 004, thereby driving the push rod 202 on the slider 201 to move downward, and the push rod 202 pushes the wire winding drum 005 downward during the downward movement, so that the wire winding drum 005 and the grass cutting transmission member 007 are out of engagement. When the grass cutting motor 006 rotates, the grass cutting rope 009 is stretched outward due to the centrifugal force, thereby achieving the effect of automatic wire release, which greatly saves human resources.

In this embodiment, a pay-off motor 101 is mounted on the upper surface of the motor fixing block 004 , and a cam 103 is fixedly connected to the output end of the pay-off motor 101 .

During specific use, the pay-off motor 101 can be installed through the motor fixing block 004. When the pay-off motor 101 needs to be released, the cam 103 can be driven to rotate after the pay-off motor 101 is started, thus having a transmission effect.

In this embodiment, a guide groove is opened on one side of the upper surface of the motor fixing block 004, one end of the guide groove passes through the upper surface of the motor fixing block 004 and extends to the interior of the skeleton 002. There are two guide grooves, and the upper surface of the skeleton 002 is fixedly connected to the shell 001.

During specific use, the guide groove allows the slider 201 to slide up and down in the guide groove, which facilitates the push rod 202 to move downward.

In this embodiment, a slider 201 is slidably connected inside the guide groove, and a push rod 202 is fixedly connected to the lower surface of the slider 201 .

During specific use, when the slider 201 moves downward, the push rod 202 can be pushed to move downward at the same time. During the downward movement of the push rod 202, the winding drum 005 is pushed downward, so that the winding drum 005 and the grass cutting transmission member 007 are out of engagement.

In this embodiment, a push rod return spring 203 is connected to the inner bottom wall of the guide groove, and the push rod return spring 203 is sleeved on the bottom end of the push rod 202 .

During specific use, under the action of the push rod return spring 203, the push rod 202 and the slider 201 can be pushed back to the highest position, thereby facilitating the push rod 202 to be separated from the winding drum 005.

In this embodiment, a magnet 302 is fixedly connected to one side of the slider 201 .

During specific use, the magnet 302 can form an induction effect with the sensor plate 301 through the adsorption effect, which is convenient for automatic switching.

In this embodiment, a sensor plate 301 is fixedly connected to one side of the upper surface of the motor fixing block 004 , and the position of the sensor plate 301 corresponds to the magnet 302 .

During specific use, a magnet 302 is installed on the slider 201, and the position of the slider 201 is sensed by the sensor plate 301 installed on the motor fixing block 004, so that the motor stops rotating and the wire release work is completed.

In this embodiment, the inner bottom wall of the bottom cover 003 is fixedly connected to a limiting mechanism, and the limiting mechanism is located between the bottom cover 003 and the winding drum 005 .

During specific use, the winding drum 005 and the grass cutting transmission part 007 rotate relative to each other. After rotating to a certain angle, the limiting mechanisms between the winding drum 005 and the bottom cover 003 contact each other, so that the winding drum 005 can stop rotating on the bottom cover 003, which has a limiting effect.

Working principle: before the line-paying operation, the mowing motor 006 rotates, driving the mowing transmission member 007 to rotate, and the mowing transmission member 007 has teeth that mesh with the winding disk 005, thereby driving the winding disk 005 to rotate, and the mowing transmission member 007 is assembled with the bottom cover 003, thereby also driving the bottom cover 003 to rotate, so that the mowing rope 009 rotates to perform the mowing operation; when the line-paying operation is in progress, the line-paying motor 101 on the line-paying power mechanism rotates, driving the cam 103 installed on the line-paying motor 101 to rotate, and the cam 103 is in contact with the slider 201 When the mowing motor 006 rotates, the mowing rope 009 extends outward due to the centrifugal force of the mowing rope 009, thereby driving the winding drum 005 and the mowing transmission part 007 to rotate relative to each other. After rotating to a certain angle, the limiting mechanism between the winding drum 005 and the bottom cover 003 The cam 103 is in contact with each other. After the pay-off motor 101 rotates one circle, the cam 103 instantly rotates from the lowest position to the highest position and disengages from the slider 201. Under the action of the push rod reset spring 203, the push rod 202 and the slider 201 return to the highest position, thereby disengaging the push rod 202 from the winding drum 005. Under the elastic force of the reset spring 008, the winding drum 005 returns to the highest position and engages with the grass cutting transmission part 007. A magnet 302 is installed on the slider 201. The position of the slider 201 is sensed by the sensor plate 301 installed on the motor fixing block 004, so that the pay-off motor 101 stops rotating and the pay-off work is completed, which is beneficial to the automation of the equipment and the improvement of efficiency, avoids the trouble of manual pay-off, thereby achieving the effect of automatic pay-off and greatly saving human resources.

The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

An automatic line-laying grass-cutting device comprises a frame (002) and a bottom cover (003), characterized in that: a motor fixing block (004) is fixedly connected to the upper surface of the frame (002), a grass-cutting motor (006) is mounted on the lower surface of the motor fixing block (004) via a flange and screws, a grass-cutting transmission member (007) is fixedly connected to the outer surface of the threaded shaft of the grass-cutting motor (006), the bottom cover (003) is fixedly connected to the threaded shaft of the grass-cutting motor (006) via a cylinder nut (401), and a wire winding reel (005) is slidably connected inside the bottom cover (003);

A return spring (008) is clamped between the bottom cover (003) and the winding drum (005), a grass cutting rope (009) is overlapped on the outer surface of the winding drum (005), and the grass cutting transmission member (007) and one side of the winding drum (005) are fixedly connected with mutually meshing teeth.
An automatic line-laying and grass-cutting device according to claim 1 is characterized in that a line-laying motor (101) is installed on the upper surface of the motor fixing block (004), and a cam (103) is fixedly connected to the output end of the line-laying motor (101).
An automatic line-laying and mowing device according to claim 1 is characterized in that: a guide groove is provided on one side of the upper surface of the motor fixing block (004), one end of the guide groove passes through the upper surface of the motor fixing block (004) and extends to the inside of the frame (002), the number of the guide grooves is two, and the upper surface of the frame (002) is fixedly connected to a shell (001).
The automatic line-laying and grass-cutting device according to claim 3 is characterized in that a slider (201) is slidably connected inside the guide groove, and a push rod (202) is fixedly connected to the lower surface of the slider (201).
An automatic line-laying and grass-cutting device according to claim 3 is characterized in that: a push rod return spring (203) is connected to the inner bottom wall of the guide groove, and the push rod return spring (203) is sleeved on the bottom end of the push rod (202).
The automatic line-laying and grass-cutting device according to claim 4 is characterized in that a magnet (302) is fixedly connected to one side of the slider (201).
The automatic line-laying and grass-cutting device according to claim 1 is characterized in that a sensor plate (301) is fixedly connected to one side of the upper surface of the motor fixing block (004), and the position of the sensor plate (301) corresponds to the magnet (302).
An automatic line-laying and grass-cutting device according to claim 1 is characterized in that: the inner bottom wall of the bottom cover (003) is fixedly connected to a limiting mechanism, and the limiting mechanism is located between the bottom cover (003) and the winding drum (005).