CN212520005U

CN212520005U - Automatic wire winding machine of beating grass

Info

Publication number: CN212520005U
Application number: CN202021972338.0U
Authority: CN
Inventors: 张华�; 杨海岳
Original assignee: ZHEJIANG ZHONGJIAN TECHNOLOGY CO LTD
Current assignee: ZHEJIANG ZHONGJIAN TECHNOLOGY CO LTD
Priority date: 2020-09-10
Filing date: 2020-09-10
Publication date: 2021-02-12
Anticipated expiration: 2030-09-10

Abstract

The invention discloses an automatic winding grass trimmer, which comprises a grass trimming head, wherein a ratchet is arranged on the end surface of a grass trimming head shell close to a motor, and the ratchet is provided with a tooth-shaped surface and a friction surface; when the first switch is started, the motor drives the winding wheel assembly and the knocking cap assembly to rotate in a first direction, the blocking piece is in contact with the friction surface of the ratchet, so that the whole grass mowing head can rotate, and the working mode is adopted at the moment; when the second switch starts, the motor drives the winding wheel assembly and the cap beating assembly rotates in the second direction, the blocking piece contacts with the tooth-shaped surface of the ratchet, the cap beating assembly cannot rotate along with the cap beating assembly at the moment, and therefore the cap beating assembly is separated from the meshing with the cap beating assembly, the winding wheel assembly and the cap beating assembly are made to rotate relatively to wind the grass beating rope onto the winding wheel assembly, and the automatic winding mode is achieved at the moment.

Description

Automatic wire winding machine of beating grass

Technical Field

The invention relates to the technical field of garden machinery, in particular to an automatic winding and grass mowing machine.

Background

The grass trimmer is a common garden tool, and the main principle of the grass trimmer is that a motor or an engine is used for driving a grass trimming head to rotate at a high speed. The winding of flexible cutting line is on the reel, just the reel holds in the head of beating grass, and the tip of flexible cutting line stretches out through the hole on the head of beating grass casing, and when the head of beating grass was high-speed rotatory, the flexible cutting line also rotated at a high speed thereupon to realize the effect of cutting.

When the grass trimmer carries out grass cutting operation, the grass cutting rope on the grass cutting head is gradually consumed due to abrasion. After a certain period of time, the user needs to replace the grass cutting cord with a new one and wind the cord onto the spool. Traditional machine of beating grass, the user need go the manual rotation spool so that the rope of beating grass twines the spool, troublesome poeration, winding speed is slow, thereby also because the staff contacts the head of beating grass at winding in-process and brings certain risk. In some grass trimmers with an automatic winding mode, the switch and the locking mechanism for realizing the starting and the closing of the automatic winding mode are complex, and the operation of a user is inconvenient.

To this end, chinese patent publication No. CN111133880A discloses a grass trimmer, comprising: grass cutting head; the driving device is used for driving the grass mowing head to rotate by taking an axis as a shaft; the operating device is used for being operated by a user to control the grass trimmer; the grass cutting head comprises a spool and a head shell, wherein the spool is used for winding a grass cutting rope, and the head shell is used for accommodating at least part of the spool and is provided with a threading hole for the grass cutting rope to pass through; the drive means includes a motor having an output shaft, the lawnmower having an automatic winding mode in which the motor drives at least one of the spool and the head housing to rotate relative to each other to wind the grass cord onto the spool; the grass trimmer still includes: the winding switch controls the automatic winding mode to be switched on or off; the operating piece controls the starting of the winding switch when being operated; and a locking mechanism which can lock at least one of the head shell or the spool and trigger the winding switch when the operating member is operated so as to enable the head shell and the spool to generate relative rotation. The technical scheme that the patent discloses, though can realize the automatic wire winding of the head of beating grass, its locking structure all needs to control locking mechanism through an operating parts of manual operation basically, in its embodiment, locking mechanism often limits the rotation of head shell up end (like part 121) through a movable part (like stop pin 171), and in the in-service use process, the initial position of head shell up end can not obtain fine control, movable part often can not be very accurate once only carry out spacing cooperation with spacing portion on the head shell up end, influence the operation experience, and above-mentioned technical scheme's structure is still comparatively complicated, it is comparatively inconvenient to make and assemble.

Due to the above problems, there is a need for improvement.

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides an automatic winding grass trimmer which is simple in structure and more convenient to use and can effectively solve the problems in the prior art.

The technical scheme adopted by the invention for solving the technical problems is as follows: an automatic wire winding grass trimmer comprising: grass cutting head; the motor is used for driving the grass cutting head to rotate around a central shaft; the first switch is used for controlling the motor to rotate at a first speed and in a first direction; the second switch is used for controlling the motor to rotate at a second speed and a second direction; wherein the second switch has a higher activation priority than the first switch;

the grass cutting head includes: the reel assembly is fixedly connected with the output shaft of the motor and is used for winding and installing a grass beating rope; the grass cutting head shell is used for accommodating at least part of the winding wheel assembly and is provided with a line hole for the grass cutting rope to pass through; the knocking cap component is arranged between the winding wheel component and the grass mowing head shell, partially extends out of the grass mowing head shell, is engaged with the grass mowing head shell in an initial state, rotates along with the winding wheel component and can move along the direction of the central shaft to be disengaged from the grass mowing head shell; return means for driving said cap assembly away from said reel assembly to engage said trimmer head housing; a motor cover covering an outside of the motor;

the grass cutting head comprises a motor cover, a motor, a grass cutting head shell and a motor, wherein a blocking piece is arranged on the motor cover, and a ratchet is arranged on the end surface, close to the motor, of the grass cutting head shell and provided with a tooth-shaped surface and a friction surface; when the first switch is started, the motor drives the winding wheel assembly and the knocking cap assembly to rotate in a first direction, the blocking piece is in contact with the friction surface of the ratchet, so that the whole grass mowing head can rotate, and the working mode is adopted at the moment; when the second switch is started, the motor drives the winding wheel assembly and the knocking cap assembly to rotate in a second direction, the blocking piece is in contact with the tooth-shaped surface of the ratchet, the grass mowing head shell cannot rotate along with the knocking cap assembly at the moment, so that the knocking cap assembly is separated from being meshed with the grass mowing head shell, the winding wheel assembly and the grass mowing head shell form relative rotation to wind the grass mowing rope onto the winding wheel assembly, and an automatic winding mode is adopted at the moment.

In the above technical scheme, further, the grass mowing head shell comprises a grass mowing head base and a fastening cover which are fastened with each other, the ratchet is arranged on the upper end face of the grass mowing head base, and an inclined plane structure meshed with the boss on the knocking cap component is arranged on the fastening cover.

In the above technical scheme, further, a line outlet block is arranged on the grass mowing head base or the fastening cover, and a funnel type large-chamfer line hole is arranged on the line outlet block.

In the above technical scheme, further, the wire winding wheel assembly includes an upper partition plate, a middle partition plate, a lower partition plate and a wire wheel base, a spline sleeve is arranged on the lower partition plate, and a spline shaft engaged with the spline sleeve is arranged on the knocking cap assembly.

In the above technical solution, further, the reel assembly is provided with 6 inlet ports.

In the above technical scheme, further, the blocking piece is a blocking piece fixedly installed below the motor cover, the blocking piece has a bending part, and the bending part is used for contacting with the ratchet.

In the above technical scheme, further, the motor cover includes a grass protection cover, and the separation blade is detachably mounted on the grass protection cover.

In the above technical solution, further, the second speed is lower than the first speed.

In the technical scheme, the grass cutting head base assembly is matched with the reel assembly through the bearing, and is tightly matched with the reel assembly to form a rigid body, so that the concentricity is good, and the vibration caused by the non-concentricity of the grass cutting head base assembly is greatly reduced.

In the technical scheme, furthermore, the control switch for automatic winding, namely the second switch, is designed above the aluminum pipe of the grass trimmer, so that the control is reliable and simple, and redundant structures are not needed.

The invention has the beneficial effects that:

1. the structure is simple, the operation is convenient, redundant operation is not needed when the device is used, and automatic winding can be realized only by opening the second switch;

2. the invention realizes the instant use in the automatic winding mode by matching the blocking piece with different end surfaces of the ratchet, and solves the problem that the initial position of the grass trimmer shell in the prior art is not well confirmed;

3. the wire wheel assembly is directly locked on the output shaft of the motor, the concentricity is good, the rigidity is good, and the vibration caused by the non-concentricity is greatly reduced;

4. a funnel type large chamfer is designed on the line outgoing block, so that the grass rope can be conveniently inserted into the line outgoing block. The design is simple, and the threading passing probability is greatly improved;

5. the reel subassembly is provided with 6 inlet openings, sets up these 6 optional positions and is used for the plug wire, can realize blind plug wire effect, and is more humanized.

Drawings

The invention is further illustrated with reference to the following figures and examples.

Fig. 1 is a schematic view of the overall structure of the present invention.

FIG. 2 is an exploded detail view of the grass trimmer of the present invention.

Fig. 3 is an exploded view of the grass-mowing head of the invention.

Fig. 4 is an exploded view of another angle grass-mowing head of the present invention.

Figure 5 is a detailed view of the grass-mowing head base of the invention.

Fig. 6 is a detailed view of the wire outlet block of the present invention.

Fig. 7 is a detailed view of the baffle of the present invention.

In the figure, 1, a motor, 2, a grass protection cover, 3, a blocking piece, 31, a bent part, 4, a screw, 5, a shaft sleeve, 6, a screw, 7, a bearing, 8, a grass cutting head base, 9, a wire outlet block, 91, a wire hole, 10, an upper partition plate, 11, a middle partition plate, 12, a lower partition plate, 121, a spline sleeve, 13, a reel base, 14, a limiting cover, 15, a return spring, 16, a knocking cap assembly, 161, a boss, 162, a spline shaft, 17, a fastening cover, 171, an inclined surface structure, 18, a grass cutting machine, 19, a grass cutting head, 20, a grass cutting rope, 21, a switch trigger, 22, a button switch, 24, a winding wheel assembly, 25, a hexagon nut, 26, a motor cover, 27, an output shaft, 28, a ratchet, 281, a friction surface, 282, a surface and 29 are arranged on a tooth-shaped.

Detailed Description

Referring to fig. 1-7, there are shown embodiments of the present invention: an automatic wire winding lawnmower 18 comprising: a grass cutting head 19; the motor 1 is used for driving the grass cutting head 19 to rotate by a central shaft 29; the first switch is a switch trigger 21 arranged in the middle of a connecting rod of the grass trimmer and is used for controlling the motor 1 to rotate at a first speed and in a first direction; the second switch is a button switch 22 arranged at the lower end of the connecting rod of the grass trimmer and is used for controlling the motor 1 to rotate at a second speed and in a second direction; the starting priority of the second switch is higher than that of the first switch, that is, when the second switch is in an on state, no matter the switch trigger 21 is pressed intentionally or unintentionally, the switch trigger 21 cannot control the working state of the motor 1; wherein the second speed is substantially lower than the first speed;

wherein the grass-mowing head 19 comprises:

the winding wheel assembly 24 is fixedly connected with an output shaft 27 of the motor 1 and used for winding and installing a grass mowing rope, and the winding wheel assembly is connected with the motor in a mode that the output shaft 27 penetrates through the winding wheel assembly 24 and then the winding wheel assembly 24 is locked on the output shaft 27 through a hexagonal nut 25;

a grass cutting head housing for accommodating at least part of the reel assembly 24 and formed with a line hole 91 through which the grass cutting line 20 passes; a striking cap assembly 16 disposed between the reel assembly 24 and the grass mowing head housing and partially protruding out of the grass mowing head housing, wherein the striking cap assembly 16 is engaged with the grass mowing head housing in an initial state, and the striking cap assembly 16 rotates along with the reel assembly 24 and can move in the axial direction of the central shaft 19 to be disengaged from the grass mowing head housing; specifically, the grass cutting head shell comprises a grass cutting head base 8 and a fastening cover 17 which are fastened with each other, the upper end surface of the grass cutting head base 8 is provided with a ratchet 28, and the fastening cover 17 is provided with an inclined surface structure 171 which is engaged with a boss 161 on the knocking cap component 16;

return means, in particular a return spring 15, for driving the striking cap assembly 16 away from the reel assembly 24, so as to engage with the head housing;

the motor cover 26 covers the outside of the motor 1, and plays a role in dust protection while mounting and positioning the motor 1;

the motor cover 26 is provided with a blocking member, the upper end surface of the grass cutting head base 8 is provided with a ratchet 28, the ratchet 28 is provided with a toothed surface 282 and a friction surface 281, the blocking member is a blocking piece 3 fixedly mounted below the motor cover 26, the blocking piece 3 is provided with a bending part 31, the bending part 31 is used for contacting with the ratchet 28, and specifically, the blocking piece 3 is preferably a sheet made of metal material with good heat dissipation performance and certain elasticity, such as aluminum. The ratchets 28 on the grass-mowing head base 8 are preferably made of materials with high wear resistance and good heat dissipation, such as aluminum; when the first switch (i.e. the switch trigger 21) is activated, the motor 1 drives the reel assembly 24 and the cap assembly 16 to rotate in a first direction, and the catch 3 contacts with the friction surface 281 of the ratchet 28, so that the whole grass-mowing head 19 rotates, and the operation mode is the working mode; when the second switch (i.e. the button switch 22) is activated, the motor 1 drives the reel assembly 24 and the knocking cap assembly 16 to rotate in the second direction, the catch 3 contacts with the toothed surface 282 of the ratchet 28, and the grass-mowing head housing cannot rotate along with the knocking cap assembly 16, so that the knocking cap assembly 16 is disengaged from the fastening cover 17, and the reel assembly 24 and the grass-mowing head housing rotate relatively to wind the grass-mowing cord 20 onto the reel assembly 24, which is an automatic winding mode.

Furthermore, a line outlet block 9 is arranged on the grass cutting head base, and a funnel type large-chamfer line hole 91 is arranged on the line outlet block 9.

Further, the winding wheel assembly comprises an upper partition plate 10, a middle partition plate 11, a lower partition plate 12 and a reel base 13, a spline sleeve 121 is arranged on the lower partition plate 12, and a spline shaft 162 meshed with the spline sleeve 121 is arranged on the knocking cap assembly 16.

Furthermore, the reel assembly is provided with 6 wire inlets which are arranged at the 6 optional positions for wire plugging, so that a blind wire plugging effect can be realized, and the reel assembly is more humanized; the motor cover 26 further comprises a grass protection cover 2, and the baffle plate 3 is detachably mounted on the grass protection cover 2 through two screws 4.

Further, the grass cutting head base 8 is tightly matched with the reel assembly 24 through the matching of the bearing 7 and the shaft sleeve 5, a rigid body is formed, the concentricity is good, and the vibration caused by the non-concentricity of the grass cutting head base 8 is greatly reduced.

Further, the grass trimmer 18 also has a knocking mode for automatically leading out the grass when in the working mode, and the knocking mode is realized by knocking the knocking cap component 16, and the working principle of the mode is to throw out the grass trimming rope by utilizing centrifugal force, so that the details are omitted for the prior art.

The above description is only an embodiment of the present invention, and is not intended to limit the present invention in any way, and simple modifications, equivalent changes and modifications may be made without departing from the technical scope of the present invention.

Claims

1. The utility model provides an automatic wire winding machine of beating grass which characterized in that includes:

grass cutting head;

the motor is used for driving the grass cutting head to rotate around a central shaft;

the first switch is used for controlling the motor to rotate at a first speed and in a first direction;

the second switch is used for controlling the motor to rotate at a second speed and a second direction;

wherein the second switch has a higher activation priority than the first switch;

the grass cutting head includes:

the reel assembly is fixedly connected with the output shaft of the motor and is used for winding and installing a grass beating rope;

the grass cutting head shell is used for accommodating at least part of the winding wheel assembly and is provided with a line hole for the grass cutting rope to pass through;

the knocking cap component is arranged between the winding wheel component and the grass mowing head shell, partially extends out of the grass mowing head shell, is engaged with the grass mowing head shell in an initial state, rotates along with the winding wheel component and can move along the direction of the central shaft to be disengaged from the grass mowing head shell;

return means for driving said cap assembly away from said reel assembly to engage said trimmer head housing;

a motor cover covering an outside of the motor;

2. The automatic winding and mowing machine according to claim 1, wherein: the grass mowing head shell comprises a grass mowing head base and a fastening cover which are mutually fastened, the ratchet is arranged on the upper end face of the grass mowing head base, and an inclined plane structure meshed with a boss on the knocking cap component is arranged on the fastening cover.

3. The automatic winding and mowing machine according to claim 2, wherein: the grass mowing head base or the fastening cover is provided with a wire outlet block, and a funnel type large-chamfer wire hole is formed in the wire outlet block.

4. The automatic winding and mowing machine according to claim 1, wherein: the reel assembly comprises an upper partition plate, a middle partition plate and a lower partition plate, wherein a spline sleeve is arranged on the lower partition plate, and a spline shaft meshed with the spline sleeve is arranged on the knocking cap assembly.

5. The automatic winding and mowing machine according to claim 4, wherein: the reel assembly is provided with 6 inlets.

6. The automatic winding and mowing machine according to claim 1, wherein: the blocking piece is fixedly installed on a blocking piece below the motor cover, and the blocking piece is provided with a bending part which is used for being in contact with the ratchet.

7. The automatic winding and mowing machine according to claim 6, wherein: the motor cover comprises a grass protection cover, and the separation blade is detachably mounted on the grass protection cover.

8. The automatic winding and mowing machine according to claim 1, wherein: the second speed is lower than the first speed.