CN115067057A

CN115067057A - Grass trimmer

Info

Publication number: CN115067057A
Application number: CN202111177023.6A
Authority: CN
Inventors: 尹义强; 郭建朋; 徐博为
Original assignee: Nanjing Chervon Industry Co Ltd
Current assignee: Nanjing Chervon Industry Co Ltd
Priority date: 2021-03-15
Filing date: 2021-10-09
Publication date: 2022-09-20
Anticipated expiration: 2041-10-09
Also published as: CN115067058B; CN218634779U; CN115067057B; CN115067058A; CN218634778U

Abstract

The invention discloses a grass trimming machine, comprising: a grass trimming head, including a spool for winding a grass trimming rope and a head shell for accommodating at least part of the spool; a driving device for driving the grass trimming head to rotate; an operating member, It is connected to the driving device and includes an operating portion for user operation; the lawn mower has a winding mode, and when the lawn mower is in the winding mode, the movement of the operating member is transmitted to the spool or the head case through the driving device to be used for the spool and the spool. There is a relative movement between the head shells that winds the hay rope to the spool. The lawn mower makes it possible for the user to quickly and easily perform winding.

Description

Grass trimmer

Technical Field

The invention relates to the technical field of garden tools, in particular to a grass trimmer.

Background

The lawn mower, as a garden tool, can be used to trim lawns, or to trim weeds near corners and shrubs.

The grass trimmer comprises a grass trimming head, wherein a grass trimming rope is arranged on the grass trimming head, when the grass trimming head rotates at a high speed, the grass trimming rope can be driven to rotate together, and the grass trimming rope rotating at a high speed achieves the purpose of grass trimming. When the grass cord is worn out to an extent that is insufficient for grass cutting, the user needs to install a new grass cord onto the grass cutting head. The grass cutting head generally comprises a head housing and a spool disposed within the head housing onto which a grass cord may be wound.

In the related art, a user is often required to open the head case, remove the spool, wind the cord onto the spool, and then reinstall the spool into the head case. Therefore, the work of winding the grass mowing rope by the user is time-consuming and labor-consuming, and the work efficiency is low. Moreover, the user's hand needs to touch the grass-mowing head, which easily dirties the user's hand.

Disclosure of Invention

In order to solve the defects of the prior art, the invention aims to provide a grass trimmer with a grass trimming rope, which can enable a user to quickly and simply install the grass trimming rope.

In order to achieve the above object, the present invention adopts the following technical solutions:

a lawnmower comprising: the grass mowing head comprises a spool for winding a grass mowing rope and a head shell for accommodating at least part of the spool; the driving device is used for driving the grass mowing head to rotate; an operating member connected to the driving device and including an operating portion for a user to operate; the lawnmower has a winding mode in which movement of the operating member is transmitted by the drive means to the spool or the head housing to cause relative movement between the spool and the head housing to wind the cord onto the spool.

In some embodiments, the drive means comprises a motor for driving rotation of the grass-mowing head, the movement of the operating member being transmitted to the spool or the head casing by the motor.

In some embodiments, the drive device further comprises a housing for housing the motor, and the lawnmower further comprises a connecting rod connected to the housing, the operating member being connected to the housing.

In some embodiments, the motor includes a motor shaft, and the lawnmower further includes a clutch assembly configured to couple the operating member to the motor shaft.

In some embodiments, the lawnmower further comprises a grass cutting mode, and the clutch device disconnects power transmission between the operating member and the motor shaft when the lawnmower is in the grass cutting mode.

In some embodiments, the lawnmower further comprises a clutch device having a first state and a second state; when the clutch device is in a first state, the movement of the operating piece is transmitted to the driving device through the clutch device, and the grass trimmer enters a winding mode; when the clutch device is in the second state, the clutch device disconnects the power transmission between the operating piece and the driving device, and the grass trimmer enters a grass cutting mode.

In some embodiments, the drive means comprises a motor for driving the spool or head housing, the motor comprising a motor shaft; when the grass trimmer is in the winding mode, the motor is not electrified, and the operating piece mechanically drives the motor shaft to rotate; the grass trimmer also comprises a grass trimming mode, when the grass trimmer is in the grass trimming mode, the motor is electrified to start running, and the motor drives the grass trimming head to rotate.

In some embodiments, when the lawnmower is in the winding mode, rotation of the operating member is transmitted to the spool by a drive device, the drive device being connected to the spool.

In some embodiments, the operating portion is spaced from the rotational axis of the operating member by a distance greater than or equal to 40 mm and less than or equal to 100 mm when the lawnmower is in the winding mode.

In some embodiments, the grass trimmer further comprises a motor, a driving device is connected with the motor and the grass trimming head to transmit power output by the motor to the grass trimming head, the operating member is connected with the driving device, the operating member drives the driving device when the grass trimmer is in the winding mode, and the driving device drives the spool or the head shell to generate relative movement between the spool and the head shell.

The invention has the advantages that: the user can install the rope of will beating the grass through simple operation is quick to beat the grass overhead, and the user need not direct touching and beat the grass head, avoids user's hand to be made dirty.

Drawings

FIG. 1 is a perspective view of a lawnmower according to a first embodiment;

FIG. 2 is a perspective view of a front end assembly of the lawnmower of FIG. 1;

FIG. 3 is a perspective view of the front end assembly of FIG. 2 from another perspective;

FIG. 4 is a cross-sectional view of the front end device of FIG. 2 with the shroud removed;

FIG. 5 is an exploded view of the front end unit of FIG. 2 with the shroud removed;

FIG. 6 is an exploded view of the front end assembly of FIG. 2 from another perspective with the shroud removed;

FIG. 7 is a perspective view of the front end assembly of the lawnmower of FIG. 2 with the operating member in a first position;

FIG. 8 is a cross-sectional view of the operating member, clutch device and motor shaft of FIG. 4 with the operating member in a second position;

FIG. 9 is a cross-sectional view of the operating member, clutch device and motor shaft of FIG. 4 with the operating member in a first position;

FIG. 10 is a cross-sectional view of a lawnmower of the second embodiment;

FIG. 11 is a perspective view of the front end assembly of the lawnmower of the third embodiment with the crank in a horizontal position;

FIG. 12 is a perspective view of the front end assembly of FIG. 11 with the crank in an upright position;

FIG. 13 is a cross-sectional view of the arrangement of FIG. 12 with the crank in an upright position and the operating assembly in a non-winding position;

FIG. 14 is a cross-sectional view of the arrangement of FIG. 12 with the crank in an upright position and the operating assembly in a wound state;

FIG. 15 is an exploded view of the structure shown in FIG. 12 from a first perspective;

fig. 16 is an exploded view of the structure of fig. 12 from a second perspective.

Detailed Description

The lawnmower 400 of the first embodiment shown in fig. 1 is used to mow lawns. Specifically, the user may operate the lawnmower 400 to break grass on a lawn, or cut grass on a shrub or building edge. The grass trimmer 400 is equipped with a grass-mowing cord 40 for breaking grass by high-speed rotation of the grass-mowing cord 40.

The lawnmower 400 includes: a front end device 400a, a connecting rod assembly 41 and a rear end device 400b, wherein the front end device 400a is arranged at the front end of the connecting rod assembly 41, and the rear end device is arranged at the rear end of the connecting rod assembly 41. The connecting rod assembly 41 includes: a connecting rod 411 and an auxiliary handle 412, wherein the connecting rod 411 is used for connecting the front end device 400a, the rear end device 400b and the auxiliary handle 412, and the connecting rod 411 basically extends along the direction of the first straight line 401. In other embodiments, the connecting rod 411 may also extend along a curve. The auxiliary handle 412 is used for assisting the user to hold, and the auxiliary handle 412 can perform position adjustment on the connecting rod 411 along the direction of the first straight line 401. It is defined that the direction along the first straight line 401 toward the front end device 400a is front and the direction along the first straight line 401 toward the rear end device 400b is rear.

The backend apparatus 400b includes: a main handle 491, a rear housing 61492, and a circuit board assembly disposed within the rear housing 61492. The main handle 491 is held by a user. When the user operates the lawnmower 400, the main handle 491 and the auxiliary handle 412 can be held by both hands, respectively, thereby achieving more stable operation of the lawnmower 400. The main handle 491 is also provided with an operating switch 491a for starting the grass trimmer 400 to power on the grass trimmer 400, and the grass trimmer 400 can drive the grass-mowing rope 40 to rotate at high speed to cut grass after being powered on. The rear housing 61492 is integrally formed with the main handle 491. In other embodiments, the rear housing 61492 may be provided separately from the main handle 491. The rear housing 61492 also has a coupling portion 492a for connecting to an energy source device, which is a battery pack for providing a source of electrical power to the lawnmower 400. In other embodiments, the joint 492a may also be connected with a cable, which may be connected with the utility grid. In other embodiments, the junction 492a may also be connected to other energy devices, for example, the junction 492a may be provided with a fuel tank, the fuel in the fuel tank may provide energy to the lawnmower 400.

As shown in fig. 1 and 2, the front-end apparatus 400a includes: the grass cutting head 50 is used for installing the grass cutting rope 40 so as to drive the grass cutting rope 40 to rotate at a high speed. The driving device 60 is used for driving the grass-mowing head 50 to rotate.

The front-end apparatus 400a further includes: a shield 42, the shield 42 surrounding at least part of the drive means 60 or the grass-mowing head 50. The shield 42 serves to prevent grass clippings from being spilled onto the user's body. The grass cutting head 50 is used for installing the grass cutting rope 40. As shown in fig. 2 to 6, the grass cutting head 50 includes a head case 51 and a spool 52, the spool 52 being used for winding the grass cutting cord 40, and the head case 51 being used for accommodating at least a part of the spool 52. The spool 52 is formed with a winding portion 521, the head shell 51 is connected with two threading elements 53, and both ends of the grass mowing rope 40 respectively pass through the threading holes 531 on the threading elements 53. The part of the grass mowing cord 40 positioned in the head shell 51 is wound on the winding part 521. When the grass cutting head 50 rotates at a high speed, the spool 52 and the head shell 51 drive the grass cutting rope 40 to rotate at a high speed, and the rotating grass cutting rope 40 can cut grass.

In the present embodiment, the head housing 51 includes an upper housing 511 and a lower housing 512, and the bobbin 52 is disposed between the upper housing 511 and the lower housing 512. A fan 514 is also provided on the upper case 511. When the grass-mowing head 50 rotates, the head shell 51 drives the fan 514 to rotate, the rotating fan 514 can generate flowing air flow, the air flow can not only dissipate heat of the driving device 60, but also flow towards the direction far away from the grass-mowing head 50, and therefore grass clippings can be prevented from being wound on the front-end device 400 a.

The driving device 60 is arranged on the upper side of the grass-mowing head 50, and the driving device 60 is used for driving the grass-mowing head 50 to rotate. In the present embodiment, the driving device 60 is connected to the bobbin 52, the driving device 60 drives the bobbin 52 to rotate around the first axis 402, and a transmission mechanism is provided between the bobbin 52 and the head housing 51. In the present embodiment, the transmission mechanism includes the first driving portion 712522 provided on the spool 52 and the first fitting portion 513 provided on the head housing 51. When the driving device 60 drives the spool 52 to rotate around the first axis 402, the first driving portion 712522 cooperates with the first cooperating portion 513 to drive the head housing 51 to rotate with the spool 52 around the first axis 402, so that the lawn mower 400 is in the grass cutting mode. In other embodiments, the driving device 60 may also be connected to the head housing 51, and the driving device 60 drives the head housing 51 to rotate, and the head housing 51 drives the spool 52 to rotate together through the first matching portion 513. In this embodiment, when the lawnmower 400 is in the grass cutting mode, the drive mechanism 60 drives the grass cutting head 50 to rotate about the first axis 402 in a first rotational direction 403. As shown in fig. 1, the first rotational direction 403 may be a clockwise direction when viewed from above. It will be appreciated that in other embodiments the first direction of rotation may also be counter-clockwise when viewed from above.

The front-end apparatus 400a further includes: an operating device 70, the operating device 70 being connected to the drive device 60, the operating device 70 comprising an operating member 71 for operation by a user.

The lawnmower 400 also has a winding mode. When the lawnmower 400 is in the winding mode, the user operates the operating member 71 to move the operating member 71, at which time the movement of the operating member 71 is transmitted to the spool 52 or the head housing 51 by the drive device 60 to generate a relative movement between the spool 52 and the head housing 51 that winds the mowing cord 40 onto the spool 52. Specifically, after the grass mowing cord 40 is used up, the user needs to install a new grass mowing cord 40 on the grass mowing head 50, the user can make the grass mowing cord 40 pass through the threading hole 531 to enable a part of the grass mowing cord 40 to be located in the head shell 51, then the user operates the operating member 71, the movement of the operating member 71 is transmitted to the spool 52 through the driving device 60 to drive the spool 52 to rotate around the first axis 402 in the second rotating direction 404, the spool 52 rotates relative to the head shell 51, and the rotating spool 52 winds the grass mowing cord 40 to the winding portion 521. The second rotation direction 404 is opposite to the first rotation direction 403, for example, the first rotation direction 403 is clockwise, and the second rotation direction 404 is counterclockwise. In the present embodiment, the movement of the operating member 71 drives the spool 52 to rotate relative to the head casing 51, so that the user can wind the mowing cord 40 onto the spool 52 with less effort. On the one hand, the user does not need to detach the spool 52 from the inside of the head case 51 to wind the mowing cord 40, so that the winding effect is higher. On the other hand, the operating switch 491a mounted to the main handle 491 need not be actuated, that is, when the lawnmower 400 is in the winding mode, the lawnmower 400 need not consume energy from the energy device, and the battery pack need not output power at this time, thereby saving energy. Furthermore, the lawn mower 400 is not set to start, and the movement is mechanically transmitted to the spool 52 through the driving device 60 only by the mechanical movement of the operating device 70, so that the reliability of the winding is ensured, and the failure of the winding does not occur. In addition, the movement of the operating member 71 is transmitted to the spool 52 through the driving device 60 without additionally providing a transmission device for power transmission, so that the size of the lawn mower 400 can be further reduced, and the manufacturing cost of the lawn mower 400 can be reduced.

As shown in fig. 5, the first driving portion 712522 includes a driving surface 522a and a bevel 522b, when the spool 52 rotates in the first rotation direction 403, the driving surface 522a contacts the first mating portion 513 to drive the head housing 51 to rotate with the spool 52, and the lawnmower 400 is in the grass cutting mode. When the spool 52 rotates in the second rotation direction 404, the inclined surface 522b of the spool 52 contacts the first engagement portion 513, the inclined surface 522b cannot drive the head housing 51 to rotate with the spool 52, and the inclined surface 522b passes through the first engagement portion 513, so that the spool 52 can rotate in the second rotation direction 404 relative to the head housing 51, and the lawn mower 400 is in the winding mode.

The lawnmower 400 further comprises a stopper 54 for restricting the rotation of the head housing 51 in the second rotational direction 404, the stopper 54 being a one-way bearing connected to the upper housing 511, the one-way bearing allowing the head housing 51 to rotate in the first rotational direction 403, but the one-way bearing not allowing the head housing 51 to rotate in the second rotational direction 404. Thus, when the spool 52 rotates in the first rotation direction 403, the one-way bearing does not restrict the rotation of the head housing 51, and the head housing 51 can rotate together with the spool 52. When the spool 52 rotates in the second rotation direction 404, the one-way bearing restricts the rotation of the head housing 51 in the second rotation direction 404, the spool 52 cannot drive the head housing 51 to rotate together, and the spool 52 moves relative to the head housing 51, so that the mowing cord 40 is wound on the spool 52. In other embodiments, the limiting member 54 may be other limiting device having two states, in one of which the limiting member 54 allows the head housing 51 to rotate, and in the other of which the limiting member 54 prevents the head housing 51 from rotating.

In the present embodiment, the driving device 60 includes: a housing 61 and a motor, in particular an electric machine 62, arranged inside the housing 61. The battery pack can provide power to the motor 62 and the circuit board assembly can be electrically connected to the motor 62 to control the motor 62. An operation switch 491a is provided for starting the motor 62. When grass is needed, the user presses the operating switch 491a, the operating switch 491a powers on the motor 62, the motor 62 drives the spool 52 to rotate around the first axis 402 along the first rotating direction 403, and at this time, the grass cutting head 50 rotates around the first axis 402 at a high speed, and the grass cutting machine 400 is in a grass cutting mode. When the grass mowing cord 40 needs to be wound, the user operates the operating member 71, the movement of the operating member 71 is mechanically transmitted to the spool 52 through the motor 62 to drive the spool 52 to rotate around the first axis 402 in the second transmission direction, relative movement is generated between the spool 52 and the head shell 51, and the grass mowing machine 400 is in the winding mode. When the lawnmower 400 is in the winding mode, the operating switch 491a is not operated, the motor 62 is not powered, and the movement of the operating member 71 is merely mechanically transmitted to the spool 52 by the motor 62, which reduces the possibility of failure in the winding mode, while reducing the power consumed by the motor 62.

The motor 62 includes a motor shaft 621, the motor shaft 621 extends along the first axis 402, the motor shaft 621 is rotatable about the first axis 402, and the motor shaft 621 is connected to the spool 52. In other embodiments, the motor shaft 621 may also be connected to the head housing 51. In other embodiments, the motor shaft 621 may be configured to rotate about an axis parallel to the first axis 402. In other embodiments, the motor shaft 621 may also be configured to rotate about an axis that is oblique to the first axis 402.

The housing 61 accommodates at least part of the motor 62, the grass cutting head 50 is disposed outside the housing 61, and the motor shaft 621 extends from inside the housing 61 to outside the housing 61 and into the grass cutting head 50. The housing 61 is also formed with a connection hole 611, and the connection rod 411 is inserted into the connection hole 611 to connect the housing 61, so that the front end device 400a is connected to the front end of the connection rod 411. The other end of the connecting rod 411 is inserted into the main handle 491 to connect the rear end device 400 b.

The operating device 70 is attached to the housing 61, and the operating member 71 is attached to the outer wall of the housing 61 such that the operating member 71 is located on the upper side of the grass-mowing head 50, thereby facilitating the operation by the user. The operation member 71 specifically comprises an operation part 711 for being operated by a user, and the operation part 711 is arranged on the upper side of the grass mowing head 50, so that when the user operates the operation member 71, the hand of the user can be far away from the grass mowing head 50, the user can not touch the grass mowing head 50, and the subsequent grass mowing work can not be affected by dirtying the hand. Moreover, the operation member 71 is disposed on the upper side of the grass-mowing head 50, so that the operation member 71 itself is prevented from being entangled with grass clippings or the operation member 71 itself is prevented from being stained with dirt.

The front end device 400a further includes a clutch device 65 provided between the operating device 70 and the driving device 60. In the present embodiment, the clutch device 65 can connect the operating member 71 and the motor shaft 621. The clutch device 65 is arranged at one end of the motor 62 far away from the grass cutting head 50. As shown in fig. 8 and 9, the clutch device 65 has a first state and a second state. When the clutch device 65 is in the first state, the movement of the operating member 71 is transmitted to the driving device 60 through the clutch device 65, and the lawn mower 400 enters the winding mode. When the clutch device 65 is in the second state, the clutch device 65 disconnects the power transmission between the operating member 71 and the driving device 60, and the lawn mower 400 is disengaged from the winding mode and enters the mowing mode.

When the clutch device 65 is in the first state, the clutch device 65 connects the operating device 70 and the motor shaft 621, and the movement of the operating member 71 can be transmitted to the spool 52 through the motor shaft 621. When the clutch device 65 is in the second state, the clutch device 65 disconnects the power transmission between the operating device 70 and the motor shaft 621, and the movement of the operating member 71 cannot be transmitted to the motor shaft 621 through the clutch device 65.

In fact, the operating member 71 is movable to a first position and a second position relative to the housing 61, and when the operating member 71 is in the first position, the operating member 71 drives the clutch device 65 to switch to the first state. When the operating member 71 moves to the second position, the operating member 71 drives the clutch device 65 to switch to the second state. That is, the first position of the operating member 71 corresponds to the first state of the clutch device 65, and the second position of the operating member 71 corresponds to the second state of the clutch device 65.

As shown in FIGS. 8 and 9, when the user needs to wind the wire, the operating member 71 can be moved from the second position to the first position, the clutch device 65 is driven by the operating member 71 to switch from the second state to the first state, the clutch device 65 connects the operating member 71 and the motor shaft 621 and can transmit power between the operating member 71 and the motor shaft 621, and the operating member 71 can mechanically drive the motor shaft 621 to rotate. When the user holds the operating member 71 and rotates the operating member 71 about the first axis 402, the clutch device 65 also rotates about the first axis 402 along with the operating member 71, and the clutch device 65 drives the motor shaft 621 to rotate about the first axis 402, so that the rotating motor shaft 621 drives the spool 52 to rotate in the second rotating direction 404 relative to the head housing 51, and the grass mowing cord 40 is wound on the spool 52.

After the grass mowing cord 40 is wound, the user needs to use the grass mowing machine 400 to mow grass. At this time, the user releases the operating member 71 or the driving operating member 71 is reset to the second position, the clutch device 65 is also reset to the second state, and the clutch device 65 disconnects the power transmission between the operating member 71 and the motor shaft 621. At this time, the user turns on the operating switch 491a, the motor 62 is powered on and starts to operate, the motor shaft 621 rotates, and the rotating motor shaft 621 drives the grass cutting head 50 to rotate at a high speed to cut grass, and at this time, the grass cutting machine 400 is in the grass cutting mode. When the clutch device 65 is in the second position and the motor shaft 621 rotates, the clutch device 65 does not transmit the movement of the motor shaft 621 to the operating member 71, and thus the operating member 71 is kept stationary.

The grass trimmer 50 can be switched between the grass trimming mode and the winding mode by arranging the clutch device 65, the operating piece 71 is not moved when the grass trimmer 400 trims grass, and the motor 62 cannot be electrified and started when the grass trimmer 400 winds the wire. Thus, the grass cutting mode and the winding mode of the lawnmower 400 do not interfere with each other.

As shown in fig. 5 to 9, the operating member 71 is rotatable about the second axis 405 with respect to the housing 61. The operating member 71 is rotatable relative to the housing 61 about the second axis 405 to a second position shown in FIG. 2, and the operating member 71 is also rotatable relative to the housing 61 about the second axis 405 to a first position shown in FIG. 7. As shown in fig. 2 and 8, when the operating member 71 is rotated to the second position, the clutch device 65 is reset to the second state, and the clutch device 65 disconnects the power transmission between the operating member 71 and the motor 62. As shown in fig. 7 and 9, when the operating member 71 is rotated to the first position, the operating member 71 drives the clutch device 65 to switch to the first state, and the clutch device 65 connects the operating member 71 and the motor 62, so that the clutch device 65 can transmit power between the operating member 71 and the motor shaft 621.

The second axis 405 is perpendicular to the first axis 402. The housing 61 is provided with a mounting member 612, and the operating member 71 is mounted to the mounting member 612 and rotatable relative to the mounting member 612 about the second axis 405.

The housing 61 includes a surrounding portion 613 and a top portion 614, the surrounding portion 613 surrounding the motor 62, the top portion 614 being disposed at an upper side of the motor 62, the top portion 614 being connected to the upper side of the surrounding portion 613. The top portion 614 is provided with a mounting portion 612 for mounting the operating member 71 so that the operating member 71 is connected to the top portion 614. The operating member 71 is rotatable relative to the top portion 614 about the second axis 405 to move to a first position and a second position. The operating member 71 can also drive the mounting member 612 to rotate about the first axis 402 with respect to the surrounding portion 613. In this embodiment, the mounting member 612 is fixedly connected to the top portion 614, the mounting member 612 and the top portion 614 are configured to rotate synchronously, and the whole of the operating member 71, the mounting member 612 and the top portion 614 is capable of rotating around the first axis 402 relative to the surrounding portion 613. In other embodiments, the mount may also be pivotally connected to the top. When the operating member 71 is moved to the first position, the user operates the operating member 71 to rotate the operating member 71 about the first axis 402, and the operating member 71 drives the mounting member 612 and the top portion 614 to rotate about the first axis 402 relative to the surrounding portion 613. The clutch device 65 forms a synchronous drive with the mounting 612. When the operating member 71 is located at the first position, the clutch device 65 is connected to the motor shaft 621, and the operating member 71 drives the mounting member 612 to rotate around the first axis 402, so that the clutch device 65 also rotates with the mounting member 612 around the first axis 402, and the clutch device 65 drives the motor shaft 621 to rotate around the first axis 402, and then the clutch device 65 transmits the rotation of the operating member 71 to the motor shaft 621, so that the spool 52 can rotate relative to the head shell 51 to realize winding.

The clutch device 65 specifically includes a clutch element 651 and a return element 652, the clutch element 651 being movable to a drive position and a non-drive position, the return element 652 being a spring biasing the clutch element 651 towards the non-drive position. When the operating member 71 is operated by a user to move from the second position to the first position, the operating member 71 drives the clutch element 651 to move from the non-transmission position to the transmission position, and the clutch device 65 is switched from the second state to the first state. That is, when the clutch element 651 is in the drive position, the clutch 65 is in the first state, and when the clutch element 651 is in the non-drive position, the clutch 65 is in the second state. Specifically, the operating element 71 is formed with a driving portion 712, and the driving portion 712 is a cam portion. When the operating member 71 moves from the second position to the first position, the driving part 712 drives the clutch element 651 to move along the first axis 402 in a direction approaching the motor shaft 621, and finally the clutch element 651 is connected to the motor shaft 621, and the clutch device 65 is switched to the first state. When the clutch element 651 is moved to the non-transmission position, the clutch element 651 is disengaged from the motor shaft 621, and the clutch device 65 is switched to the second state. The mounting member 612 remains fixed in position along the first axis 402, and when the operating member 71 moves relative to the mounting member 612 from the second position to the first position about the second axis 405, the driving portion 712 contacts the clutch element 651 and drives the clutch element 651 to slide relative to the mounting member 612. The mounting member 612 is configured to rotate in synchronization with a clutch member 651, the mounting member 612 is formed with a mounting slot 612a, and the clutch member 651 includes an arm 651a that can be inserted into the mounting slot 612 a. The mounting slot 612a cooperates with the arm 651a, the mounting slot 612a and the arm 651a constitute a synchronous rotation about the first axis 402, while the mounting slot 612a also allows the arm 651a to slide in the direction of the first axis 402.

The reset element 652 generates a biasing force that drives the clutch element 651 toward the non-transmitting position. When the operating member 71 is reset from the first position to the second position, the operating member 71 allows the clutch element 651 to be reset to the non-transmission position, and the reset element 652 drives the clutch element 651 to be reset to the non-transmission position, so that the clutch element 651 can be kept in the non-transmission position when the user does not operate the operating member 71, and the grass mowing machine 400 is not influenced. Specifically, the reset element 652 is a spring that holds the clutch element 651, and the biasing force generated by the spring biases the clutch element 651 toward a direction away from the motor shaft 621.

The clutch member 651 forms a first transmission portion 651b, the motor shaft 621 forms or is connected to a second transmission portion 621a, and the first transmission portion 651b and the second transmission portion 621a can be engaged with each other. Specifically, the clutch element 651 forms a transmission hole, a hole wall of the transmission hole forms a first transmission portion 651b, and the first transmission portion 651b is a first meshing tooth. The motor shaft 621 is fixedly connected with a driving wheel, the driving wheel forms a second transmission part 621a, and the second transmission part 621a is a second meshing tooth. When the clutch element 651 is moved to the transmission position, the driving wheel is inserted into the transmission hole, and the first transmission part 651b is engaged with the second transmission part 621a, so that the clutch element 651 can drive the motor shaft 621 to rotate. And when the clutch element 651 is moved to the non-transmission position, the first transmission portion 651b is disengaged from the second transmission portion 621 a.

In the present embodiment, the operation member 71 is at least partially disposed on the upper side of the driving device 60, so that the user can operate the device more conveniently, and the user can keep his hand away from the grass-mowing head 50 during winding, thereby avoiding the arm 651a from being soiled.

Specifically, the operation member 71 further includes a connection portion 713, and the connection portion 713 is used to connect the operation member 71 to the mounting member 612. The operating member 71 is at least partially disposed on the upper side of the grass-mowing head 50. The distance L1 between the operating piece 71 and the lower end surface of the grass-mowing head 50 in the direction along the first axis 402 is equal to or greater than 30 mm and equal to or less than 220 mm. Thus, when the user operates the operation unit 711, the hand of the user is spaced from the lower end surface of the grass-mowing head 50 by a certain distance, and the hand of the user does not touch the ground or the lower end surface of the grass-mowing head 50. When the lawn mower 400 is switched from the grass-mowing mode to the winding mode, the position of the operating part 711 is changed.

The part of the lawn mower 400 other than the operating member 71 is defined as a main body 406, and the main body 406 includes: a rear end device 400b, a connecting rod assembly 41, an auxiliary handle 412, a driving device 60 and a grass-mowing head 50. In the present embodiment, the operating member 71 is fixedly mounted to the main body 406, and specifically, the operating member 71 is mounted to the housing 61. Thus, the operating member 71 is still mounted to the main body 406 even when the lawnmower 400 is in the grass cutting mode. Therefore, no matter the grass trimmer 400 is in the winding mode or the grass mowing mode, the operating piece 71 is installed on the shell 61, the operating piece 71 cannot be separated from the main body 406 all the time, and therefore the operating piece 71 can be prevented from being lost.

In the present embodiment, the operating member 71 is fixedly mounted to the mounting member 612. Of course, in other embodiments, the operating member may be removably mounted to the mounting member. Alternatively, in other embodiments, the operating member may be non-removably mounted to the mounting member.

In other embodiments, when the operating member 71 is detachably mounted to the mounting member 612, other portions of the main body 406 may be provided with a receiving groove capable of receiving the operating member 71. When the lawnmower 400 is in the winding mode, the operating member 71 is mounted to the mounting member 612. When the lawn mower 400 is in the grass cutting mode, the operating member 71 is mounted to the receiving groove. Thus, even when the lawnmower 400 is in the grass cutting mode, the operating member 71 can still be attached to the main body 406, which can prevent the operating member 71 from being lost.

As shown in fig. 2, the housing 61 is further formed with a receiving groove 615, and the operating part 711 is fitted into the receiving groove 615 when the operating element 71 is in the second position. When the user does not operate the operating member 71, the receiving groove 615 can limit the operating member 71 from being disengaged from the receiving groove 615, so that the shaking of the operating member 71 can be avoided.

As shown in fig. 7 and 8, the operating part 711 further includes a roller 711a, and the roller 711a is rotatably connected to the connecting part 713, so that the user can operate the operating member 71 by operating the roller 711a, thereby saving labor for the user.

In the present embodiment, when the lawn mower 400 is in the winding mode, the user rotates the operating member 71 about the first axis 402, and the distance L2 between the operating part 711 and the first axis 402 is greater than or equal to 40 mm and less than or equal to 100 mm. Thus, the user can rotate the operation member 71 more easily, and the size of the front-end unit 400a is prevented from being affected by the operation member 71 being too large.

A lawnmower 700 according to a second embodiment, as shown in fig. 10, includes a connecting rod 701, a rear end device, and a front end device 73. The front-end device 73 includes: a housing 731, a motor 732, a drive 733, and a grass-mowing head 734. The housing 731 accommodates a driving device 733 and a motor 732, the driving device 733 is provided between the motor 732 and the grass cutting head 734 to connect the motor 732 and the grass cutting head 734, and the driving device 733 transmits power output from the motor 732 to the grass cutting head 734. The grass cutting head 734 includes a spool 734a and a head shell 734b, and a motor 732 drives the spool 734a or the head shell 734b via a drive 733, thereby effecting rotation of the grass cutting head 734 about a first axis. The front-end unit 73 further comprises an operating device 735, the operating device 735 being arranged to be connectable to a driving device 733. The operating device 735 includes an operating member 735a that can be connected to the drive device 733, and the movement of the operating member 735a is transmitted to the spool 734a or the head housing 734b through the drive device 733 without transmitting power to the spool 734a or the head housing 734b through the motor 732. When the lawnmower 700 is in the reel mode, the operating member 735a rotates to drive the drive mechanism 733 to rotate, and the drive mechanism 733 in turn drives the spool 734a or the head housing 734b to rotate to produce relative movement between the spool 734a and the head housing 734 b. When the lawnmower 700 is in the grass cutting mode, the operating member 735a disengages the drive 733, the motor 732 drives the drive 733 to rotate, and the drive 733 drives the spool 734a or the head housing 734b to rotate the grass cutting head 734.

FIG. 11 shows a front end assembly 100a of a third embodiment of a lawnmower having the same rear end assembly and connecting bar as the first embodiment of the lawnmower, and the front end assembly 100a of the third embodiment being the same as the front end assembly 400a of the first embodiment of the lawnmower, shown in FIG. 10. The function of the third embodiment 20 is also substantially the same as the first embodiment, except that the specific structure of the drive device 20 is different from that of the first embodiment. The operating device 30 of the third embodiment can achieve substantially the same functions as the operating device 70 of the first embodiment, except that the specific structure of the operating device 30 of the third embodiment is different from that of the operating device 70 of the first embodiment.

As shown in FIG. 11, the front end device 100a comprises a grass-mowing head 10 and a driving device 20, wherein the grass-mowing head 10 is used for mowing grass, and the driving device 20 is used for driving the grass-mowing head 10 to rotate around a rotation axis 101 as an axis

As shown in fig. 11 to 16, the driving device 20 includes a motor 21, a motor housing 212, and a transmission assembly 22. The motor 21 is used for driving the grass-mowing head 10 to rotate, and the motor 21 specifically comprises a motor shaft 211, and in the embodiment, the motor 21 also rotates by taking the rotation axis 101 as an axis. Of course, it is understood that in other embodiments, the motor shaft 211 may not rotate around the rotation axis 101, for example, the motor shaft 211 may rotate around a straight line parallel to the rotation axis 101, and the motor shaft 211 may rotate around a straight line perpendicular to the rotation axis 101. The motor housing 212 is for accommodating the motor 21. The motor housing 212 may be formed with an accommodation chamber in which the motor 21 is disposed. The transmission assembly 22 is used to effect the transmission of power between the motor 21 and the grass-mowing head 10.

The motor 211 is specifically an electric motor, which is further a brushless electric motor, and more specifically, the electric motor is an outer rotor brushless electric motor, and the electric motor includes a rotor assembly and a stator assembly, where the rotor assembly includes a rotor shaft, and the rotor shaft is the motor shaft 211.

The grass cutting head 10 is used for driving the grass cutting rope 102 to rotate at a high speed so as to cut vegetation, and the grass cutting head 10 comprises a head shell 11 and a spool 12. Wherein the spool is used for winding the grass mowing cord 102, and the head housing 11 is used for accommodating the spool 12. The bobbin 12 is disposed in a receiving space surrounded by the head housing 11.

The front-end device 100a further includes an operating device 30 provided on the driving device 20 to be operated by a user, and the operating device 30 is operable to perform winding.

Further, the operating device 30 includes a winding state and a non-winding state. When the operating device 30 is in a winding state, the operating device 30 is in transmission connection with the motor 21 to drive the grass mowing head 10, so that relative rotation taking the rotation axis 101 as a shaft is generated between the spool 12 and the head shell 11 to perform winding; when the operating device 30 is in the non-winding state, the operating device 30 is separated from the motor 21.

Specifically, the grass trimmer has an automatic winding mode, a manual winding mode, and a grass cutting mode, but it is needless to say that the grass trimmer head 10 has an automatic winding mode, a manual winding mode, and a grass cutting mode. When the grass cutting head 10 is in the automatic winding mode, the motor 21 can drive the spool 12 to rotate in a first rotation direction around the rotation axis 101 relative to the head housing 11 so as to automatically wind the grass cutting cord 102 on the spool 12. When the grass mowing head 10 is in the manual winding mode, the operating device 30 is in the winding state, and the user can rotate the spool 12 relative to the head shell 11 by using the operating device 30 in the first rotating direction by taking the rotating axis 101 as an axis, and the grass mowing rope 102 can be wound on the spool 12. When the user operates the operation switch to start the motor 21, the motor 21 can drive the spool 12 to rotate in the second rotation direction around the rotation axis 101, so that the grass trimmer is in the grass cutting mode. In the present embodiment, the first rotation direction may be considered as a counterclockwise direction when viewed from the motor 21 toward the grass-mowing head 10, and the second rotation direction may be considered as a clockwise direction, which is not limited to this. It is understood that in other embodiments, the motor shaft 211 may be connected to the head housing 11 to drive the head housing 11 to rotate, such that when the grass-mowing head 10 is in the automatic winding mode, the motor 21 drives the head housing 11 to rotate to cause the spool 12 to rotate relative to the head housing 11 in the first rotation direction so as to wind the grass mowing cord 102 onto the spool 12 automatically, and similarly, the operating device 30 may be connected to the head housing 11, and when the grass-mowing head 10 is in the manual winding mode, the user operates the operating device 30 to rotate the head housing 11 to cause the spool 12 to rotate relative to the head housing 11 in the first rotation direction so as to wind the grass mowing cord 102 onto the spool 12.

In this way, the grass cutting head 10 can transmit power from one side of the motor 21 to the spool 12 to automatically wind the grass cutting rope 102, and can also transmit power from one side of the operating device 30 to the spool 12 to wind the grass cutting rope 102 to the spool 12, so that a user can automatically wind the grass cutting rope 102 by triggering the operating switch, and can also manually wind the grass cutting rope 102 by the operating device 30, thereby really realizing a grass cutting machine integrated with manual operation and automatic operation. Thus, on the one hand, when the user winds the grass mowing cord 102 by rotating the operating device 30, the user may feel fatigue, and at this time, the user can automatically wind the grass mowing cord 102 to the spool 12 by operating the operating switch, thereby facilitating the operation of the user and improving the working efficiency. In addition, when the automatic winding mode of the grass trimmer fails, the user can manually wind the grass trimming rope 102 on the spool 12 by operating the device 30, so that the reliability of the grass trimmer is improved; and the problem that the winding caused by the fact that the grass head is directly contacted by a hand and the hand is polluted during manual winding can be avoided, the winding speed and the user experience are improved, and the working efficiency is improved.

The operating device 30 specifically comprises a crank 31 and a rotary button 32, the crank 31 is hinged on the top of the rotary button 32, the crank 31 is used for pressing the rotary button 32 downwards when the operating device 30 is in a winding state so that the rotary button 32 is connected with a motor shaft 211 of the motor 21, and the winding is realized by rotating the crank 31 through external force; when the operating device 30 is in the non-winding state, the rotary knob 32 is in a separated state from the motor shaft 211. Specifically, the crank 31 can be rotated from a vertical position (a position parallel to the rotation axis 101) to a horizontal position, and when the crank 31 is located at the vertical position, the crank 31 is pressed downward to drive the rotary button 32 to be connected downward with the motor shaft 211, and it can be understood that when the crank 31 is located at an inclined position, the crank 31 can also be pressed downward to perform a winding operation, but the working efficiency is low.

Further, the operating device 30 further comprises an elastic return member 33, the two ends of which act on the rotary button 32 and the motor housing 212, respectively. In the winding state, the elastic restoring member 33 is in a compressed state; in the non-winding state, the rotary button 32 is separated from the motor shaft 211 by the elastic restoring member 33. Through setting up elasticity piece 33 that resets, realized operating means 30 winding state and the fast switch-over of non-winding state, simple structure, easily realization, and low cost.

The motor 21 further includes a shaft sleeve 213, and the shaft sleeve 213 is disposed on the top end of the motor shaft 211 and can drive the motor shaft 211 to rotate. In the winding state, the rotary button 32 is connected with the shaft sleeve 213, so that the transmission connection with the motor shaft 211 is realized; in the non-winding state, the rotary knob 32 is separated from the sleeve 213. By providing the shaft sleeve 213, wear of the motor shaft 211 can be avoided, and the service life of the motor shaft 211 can be prolonged.

The operating device 30 further comprises an annular cover plate 34, the annular cover plate 34 is connected to the top of the motor housing 212 and forms a containing cavity with the motor housing 212, the rotary button 32 is located in the containing cavity, and the crank 31 is at least partially located on the outer side of the annular cover plate 34 so as to be operated. When the operating device 30 is in the non-winding state, the rotary button 32 and the sleeve 213 of the motor shaft 211 are in a separated state under the action of the elastic reset piece 33; when the operating device 30 is in the winding state, the user needs to turn the crank 31 to the vertical position, then presses the rotary button 32 through the crank 31 until the rotary button 32 is matched with the shaft sleeve 213 on the motor shaft 211, and then rotates the crank 31 to realize winding, and after the winding action is completed, the crank 31 is released and the crank 31 is placed in the horizontal position.

Further, be equipped with constant head tank 341 on the annular cover 34, the one end of crank 31 articulates in rotary button 32, and the other end can lift up to vertical position or lay flat to horizontal position joint in constant head tank 341. Through setting up constant head tank 341, be convenient for accomodate crank 31. Furthermore, a handle groove 342 is formed in the outer periphery of the annular cover plate 34 on a side away from the hinge joint of the crank 31 and the rotary button 32, the handle groove 342 is communicated with the positioning groove 341, and the crank 31 can be lifted by a human hand conveniently by the aid of the handle groove 342.

Preferably, the rotary button 32 has a T-shaped cross section and includes a stopper 321 and a rotary portion 322 that are vertically connected. The crank 31 is hinged to the top surface of the limiting part 321, and in a non-winding state, under the action of the elastic reset piece 33, the upper surface of the limiting part 321 is abutted to the inner top surface of the annular cover plate 34, that is, the inner top surface of the annular cover plate 34 has a certain limiting effect on the rotating button 32; in the winding state, the stopper 321 is spaced from the inner top surface of the annular cover plate 34 by a predetermined distance under the pressing action of the crank 31. The rotating portion 322 is connected to a lower surface of the limiting portion 321, and the rotating portion 322 is used for being connected to the shaft sleeve 213, and may be in a clamping manner.

Further, the middle part of the rotating part 322 is provided with a clamping hole, and the shaft sleeve 213 is clamped with the clamping hole. Preferably, the fastening hole is a shaped hole, and the outer circumference of the sleeve 213 is shaped to fit the shaped hole, so as to rotate with the rotating part 322. Through setting up the dysmorphism structure, saved the connecting piece, saved the cost, and the reliability is higher.

The periphery of rotating part 322 is located to the cover of elasticity piece 33, is provided with spacing recess on the motor housing 212, and the upper end butt of elasticity piece 33 is located spacing recess between spacing portion 321 and the rotating part 322, and the lower extreme. Preferably, the elastic return member 33 is a pagoda-shaped spring. The pagoda-shaped spring has the advantages of small volume, large load and the like, is suitable for small space, has a certain damping effect, and can ensure the stable winding process.

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 using equivalent alternatives or equivalent variations fall within the scope of the present invention.

Claims

1. A lawnmower comprising:

the grass mowing head comprises a spool for winding a grass mowing rope and a head shell for accommodating at least part of the spool;

the driving device is used for driving the grass mowing head to rotate;

an operating member connected to the driving device and including an operating portion for a user to operate;

the lawnmower has a winding mode wherein movement of the operating member is transmitted by the drive arrangement to the spool or the head housing to cause relative movement between the spool and the head housing which winds the grass cord onto the spool.

2. A lawnmower according to claim 1, wherein the drive means comprises a motor for driving the grass cutting head in rotation, the movement of the operating member being transmitted to the spool or the head housing by the motor.

3. A lawnmower according to claim 2, wherein the drive further comprises a housing for housing the motor, the lawnmower further comprising a connecting rod connected to the housing, the operating member being connected to the housing.

4. A lawnmower according to claim 2, wherein the motor comprises a motor shaft, and the lawnmower further comprises a clutch means for connecting the operating member to the motor shaft.

5. A lawnmower according to claim 4, further comprising a grass mode, wherein the clutch means disconnects power transmission between the operating member and the motor shaft when the lawnmower is in the grass mode.

6. A lawnmower according to claim 1, further comprising a clutch device, the clutch device having a first state and a second state; when the clutch device is in the first state, the movement of the operating piece is transmitted to the driving device through the clutch device, and the grass trimmer enters the winding mode; when the clutch device is in the second state, the clutch device disconnects the power transmission between the operating piece and the driving device, and the grass trimmer enters a grass cutting mode.

7. A lawnmower according to claim 1, wherein the drive means comprises a motor for driving the spool or the head housing, the motor comprising a motor shaft; when the grass trimmer is in the winding mode, the motor is not electrified, and the operating piece mechanically drives the motor shaft to rotate; the grass trimmer also comprises a grass trimming mode, when the grass trimmer is in the grass trimming mode, the motor is electrified to start running, and the motor drives the grass trimming head to rotate.

8. A lawnmower according to claim 1, wherein the rotation of the operating member is transmitted to the spool by the drive means when the lawnmower is in the winding mode, the drive means being connected to the spool.

9. The lawnmower of claim 8, wherein the operating portion is spaced from the rotational axis of the operating member by a distance greater than or equal to 40 mm and less than or equal to 100 mm when the lawnmower is in the winding mode.

10. A lawnmower according to claim 1, further comprising a motor, the drive being connected to the motor and the grass cutting head to transfer power output by the motor to the grass cutting head, the operating member being connected to the drive, the operating member driving the drive when the lawnmower is in the winding mode, the drive driving the spool or the head housing to produce relative movement between the spool and the head housing.