CN215912553U

CN215912553U - Grass cutter

Info

Publication number: CN215912553U
Application number: CN202120027846.XU
Authority: CN
Inventors: 苏博文
Original assignee: Nanjing Chervon Industry Co Ltd
Current assignee: Nanjing Chervon Industry Co Ltd
Priority date: 2021-01-06
Filing date: 2021-01-06
Publication date: 2022-03-01
Anticipated expiration: 2031-01-06

Abstract

The utility model discloses a mower, comprising: a cutting device for performing a cutting function; a chassis formed with an accommodating space accommodating at least a part of the cutting device; the cutting device includes: a first blade formed with a first blade edge for mowing; a second blade formed with a second blade edge for cutting grass; the lawn mower still includes: the motor comprises a motor shaft and can drive the first blade and the second blade to rotate; and the clutch mechanism is connected with the first blade and can move to a first position and a second position, when the clutch mechanism is positioned at the first position, the first blade is directly or indirectly meshed with the motor shaft, and when the clutch mechanism is positioned at the second position, the first blade is disengaged from the motor shaft. The utility model can provide the mower which can adapt to different cutting requirements so as to respectively improve the cutting capability and ensure the endurance time of the mower.

Description

Grass cutter

Technical Field

The utility model relates to a garden tool, in particular to a mower.

Background

Mowing is the most basic operation of lawn trimming, and a simple and efficient mowing machine is required to be used, so that the mowing task is finished with guaranteed quality and quantity. At present, the lawn mower is widely applied to the construction of various lawns, wherein the blade of the lawn mower is used as a functional element, and the cutting performance of the lawn mower is greatly influenced by the structural design of the lawn mower.

In order to adapt the lawn mower to the mowing requirements of more scenes, a double-blade lawn mower has been proposed. The double-blade mower can improve the cutting performance of the mower, but relatively reduces the cruising ability of the mower and the relative loading ability of the blades, and is not beneficial to the optimization of the whole weight of the mower.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects in the prior art, the utility model aims to provide the mower capable of meeting different cutting requirements so as to respectively improve the cutting capability and ensure the endurance time of the mower.

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

a lawn mower, comprising: a cutting device for performing a cutting function; a chassis formed with an accommodating space accommodating at least a part of the cutting device; the cutting device includes: a first blade formed with a first blade edge for mowing; a second blade formed with a second blade edge for cutting grass; the lawn mower still includes: the motor comprises a motor shaft and can drive the first blade and the second blade to rotate; and the clutch mechanism is connected with the first blade and can move to a first position and a second position, when the clutch mechanism is positioned at the first position, the first blade is directly or indirectly meshed with the motor shaft, and when the clutch mechanism is positioned at the second position, the first blade is disengaged from the motor shaft.

Optionally, the clutch mechanism comprises: the transmission piece is fixedly connected with the first blade; and the operating device can drive the transmission member to move so that the clutch mechanism moves between the first position and the second position.

Optionally, the lawn mower further comprises: and the connecting element is connected to the motor shaft, and the transmission piece is engaged with the connecting element when the clutch mechanism is located at the first position.

Optionally, the motor shaft is rotatable about the first axis; the connecting element comprises a convex block, the transmission part comprises a sliding groove, and the convex block can be separated from the sliding groove along the first direction.

Optionally, the outer diameter of the coupling member is tapered in a direction along the first axis toward the motor.

Optionally, the transmission member includes an annular groove, and the operation device includes a fork inserted into the annular groove.

Optionally, the shifting fork is provided with a spherical groove, and the clutch mechanism further comprises a ball arranged in the spherical groove.

Optionally, the second blade is connected to the motor shaft and rotates synchronously with the motor shaft.

Optionally, the lawn mower further comprises: a motor housing supporting the motor and the operating device.

Optionally, the operating device further comprises an elastic member, and the elastic member is disposed in the motor housing.

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

a cutting device for performing a cutting function; a chassis formed with an accommodating space accommodating at least a part of the cutting device; the cutting device includes: a first blade formed with a first blade edge for mowing; a second blade formed with a second blade edge for cutting grass; the lawn mower still includes: the motor comprises a motor shaft and can drive the first blade and the second blade to rotate, and the second blade and the motor rotate synchronously; and the clutch mechanism is connected with the first blade and can drive the first blade and the second blade to synchronously rotate or enable the first blade to stop rotating relative to the second blade, and when the first blade and the second blade synchronously rotate, the phase angle of the first blade and the phase angle of the second blade are fixed.

The utility model has the advantages that: the cutting device of the mower comprises the double blades, the switching between the single-blade cutting operation and the double-blade cutting operation is realized through the clutch mechanism, and the single-blade cutting operation and the double-blade cutting operation can be realized only by using one motor, so that the mower can meet the high-load cutting requirement or the long-term endurance cutting requirement under different scenes.

Drawings

FIG. 1 is a schematic view of a lawn mower of the present invention;

FIG. 2 is a bottom schematic view of the mower of FIG. 1;

FIG. 3 is a schematic view of the motor, clutch mechanism and cutting device of a first embodiment of the mower of the present invention;

FIG. 4 is a schematic cross-sectional view of the motor, clutch mechanism and cutting device with the clutch mechanism in a first position for a lawnmower according to a first embodiment of the present invention;

FIG. 5 is a perspective view of the motor, clutch mechanism and cutting device with the clutch mechanism in a first position for a lawnmower according to a first embodiment of the present invention;

FIG. 6 is a schematic cross-sectional view of the motor, clutch mechanism and cutting device with the clutch mechanism of the first embodiment of the mower of the present invention in a second position;

FIG. 7 is a perspective view of the motor, clutch mechanism and cutting device with the clutch mechanism of the mower of the first embodiment of the present invention in a second position;

fig. 8 is a schematic structural view of a ring gear of a housing of the lawnmower according to the first embodiment of the present invention.

Detailed Description

As shown in fig. 1 and 2, the mower 100 is a double-blade mower. The mower 100 may be either a walk-behind or a riding mower.

As shown in fig. 1 to 3, the lawn mower 100 includes a cutting device 110 for cutting vegetation and a chassis 120 for accommodating the cutting device 110, the chassis 120 being formed with an accommodating space for accommodating at least part of the cutting device 110. The cutting device 110 includes a first blade 111 and a second blade 112. Wherein the first blade 111 is formed with a first cutting edge for cutting grass. The second blade 112 is formed with a second cutting edge for cutting grass.

Referring to fig. 4, the lawn mower 100 further comprises a motor 130, a clutch mechanism 140, and a power source for providing a power source to the motor 130, the motor 130 comprising a motor shaft 131, the motor shaft 131 being rotatable about the first axis 101, the motor shaft 131 driving the first blade 111 and the second blade 112 to rotate. The power supply may be a dc power supply, an ac power supply, or an ac/dc power supply, and the dc power supply may be one battery pack or a plurality of battery packs.

Referring to fig. 5 to 7, the clutch mechanism 140 is connected to the first blade 111, and the clutch mechanism 140 can be moved to a first position and a second position, wherein the first blade 111 is directly or indirectly engaged with the motor shaft 131 when the clutch mechanism 140 is located at the first position, and the first blade 111 and the second blade 112 are rotated synchronously when the motor 130 is rotated. When the clutch mechanism 140 is in the second position, the first blade 111 is disengaged from the motor shaft 131, and when the motor 130 is rotating, the first blade 111 is not rotating. By connecting the first blade 111 and the motor shaft 131 through the clutch mechanism 140, the lawnmower 100 can be switched between the single-blade cutting mode and the double-blade cutting mode by switching the position of the clutch mechanism 140. According to the mowing requirement, when light load is needed, the single blade is driven to rotate to cut vegetation, and the power consumption of the mower 100 is reduced; when heavy load is needed, the cutting capacity of the mower 100 is improved by driving the first blade 111 and the second blade 112 to rotate simultaneously. Through the connection of the clutch mechanism 140, the rotation of the double-blade single-blade mode and the double-blade mode can be realized only by arranging the single motor 130, the overall weight of the mower 100 is not excessively increased, the performance of the mower 100 can be optimized, the load capacity of the mower 100 is improved, and the cruising capacity of the mower 100 is prolonged.

The clutch mechanism 140 includes a transmission member 141, and the transmission member 141 is fixedly connected to the first blade 111, where the fixed connection means that the transmission member 141 and the first blade 111 are connected and can rotate synchronously during the operation of the lawn mower 100. The synchronous rotation may be the same speed rotation or the differential rotation. Alternatively, the transmission member 141 and the first blade 111 are fixedly coupled by a screw so that the first blade 111 and the motor shaft 131 rotate at the same speed, and it can be understood that the first blade 111 and the motor shaft 131 are directly engaged. The motor shaft 131 and the clutch mechanism 140 may be directly provided with a transmission mechanism, so that the first blade rotates in a differential speed relative to the motor shaft, and the motor shaft and the first blade are indirectly engaged. Optionally, the transmission mechanism is disposed between the clutch and the first blade.

The mower further comprises an operating device 142, wherein the operating device 142 can drive the transmission member 141 to move, so that the clutch mechanism 140 moves between the first position and the second position. The user can control the operating device 142 to drive the clutch mechanism 140 to displace according to the requirement, so as to switch the single-blade cutting mode and the double-blade cutting mode of the mower 100. Optionally, the mower 100 further includes a steering engine and a switch capable of controlling the steering engine, and the steering engine is connected to the operating device 142 through a rack and a pusher dog, so that the rotary motion of the steering engine can be converted into the linear motion of the operating device 142. The user presses the switch, and the steering engine rotates and rotates reversely to drive the operating device 142 to move linearly, so as to switch the clutch mechanism 140 to the first position and the second position, and switch the single-blade cutting mode and the double-blade cutting mode of the mower 100.

The clutch mechanism 140 further includes a connecting member 143, the connecting member 143 is connected to the motor shaft 131, the connecting member 143 is a flange member sleeved on the periphery of the motor shaft 131, and is a sleeve surrounding the periphery of the motor shaft 131, and the connecting member 143 can rotate synchronously with the motor shaft 131. When the clutch mechanism 140 is in the first position, the transmission member 141 is engaged with the connecting member 143, so that the connecting member 143 can drive the transmission member 141 to rotate. When the clutch mechanism 140 is in the second position, the transmission member 141 is moved to disengage the connecting member 143, and the connecting member 143 rotates relative to the transmission member 141. The transmission element 141 is connected to the operating device 142, and the transmission element 141 can be driven to reciprocate along the first direction 102 by the operating device 142.

The transmission member 141 is a ring member sleeved outside the connecting element 143, and the transmission member 141 can move along the first direction 102 relative to the connecting element 143. Connecting element 143 includes a projection 1431 and transmission member 141 includes a sliding slot 1411. The protrusion 1431 can be disengaged from the sliding slot 1411 along the first direction 102, and the connecting element 143 rotates without driving the transmission member 141 to rotate. Projection 1431 can slide into slide 1411 in a direction opposite to first direction 102, so that drive element 141 and connecting element 143 are brought into engagement by projection 1431 and slide 1411. Optionally, the connecting element 143 is provided with a sliding slot 1411, and the transmission member 141 is provided with a projection 1431.

Optionally, the first direction 102 is a radial direction of the first axis 101. In a direction towards the motor 130 along the first axis 101, the outer diameter of the connecting element 143 is tapered, i.e. in the first direction 102, the outer diameter of the connecting element 143 is tapered. Thus, when the clutch mechanism 140 is located at the first position, the inner wall of the transmission member 141 and the outer wall of the connecting element 143 are abutted, and the transmission member 141 and the connecting element 143 rotate synchronously. When clutch mechanism 140 moves to the second position, transmission member 141 moves relative to transmission member 141 along first direction 102, and the outer diameter of coupling element 143 aligned with transmission member 141 in the radial direction of first axis 101 is relatively small, so that at this time, there is a gap between the inner wall of transmission member 141 and the outer wall of coupling element 143, and slide groove 1411 and projection 1431 are disengaged, so that coupling element rotates relative to transmission member 141.

Referring to fig. 5, the transmission member 141 includes an annular groove 1412, and the operating device 142 includes a connecting rod 1421 and a fork 1423 inserted into the annular groove 1412, the fork 1423 being disposed at a distal end of the connecting rod 1421. Fork 1423 can rest within annular groove 1412 as drive member 141 rotates about first axis 101. Optionally, the fork 1423 is provided with a spherical groove, and the clutch mechanism 140 further includes a ball 144 disposed in the spherical groove, wherein the ball 144 is in contact with the transmission member 141, and when the transmission member 141 rotates around the first axis 101, the ball 144 rolls and does not rotate the transmission member 141. Thus, the operating device 142 can drive the transmission member 141 to move back and forth along the first direction 102, and the operating device 142 can be prevented from rotating relative to the transmission member 141. The second blade 112 is connected to the motor shaft 131 and rotates in synchronization with the motor shaft 131.

In summary, when the user determines that the current mowing environment needs the heavy-duty operation, when the user uses the operating device 142 to make the transmission mechanism located at the first position, the protrusion 1431 is located in the chute 1411, the transmission member 141 is engaged with the connecting device, the motor 130 drives the transmission member 141 to rotate through the connecting device, so that the first blade 111 rotates, the second blade 112 is directly connected with the motor shaft 131, and the motor shaft 131 is directly driven to rotate. When the user judges that the current vegetation only needs the light load operation, the user moves the transmission mechanism to the second position through operating device 142, transmission member 141 moves along first direction 102 relative to the connecting device at this moment, lug 1431 slides out of chute 1411 relatively, the inner wall of transmission member 141 and the outer wall of connecting device have certain clearance, thereby drive second blade 112 to rotate when motor shaft 131 rotates, thereby transmission member 141 does not rotate first blade 111 does not rotate, lawn mower 100 single blade rotates this moment, thereby the time of endurance of the power supply is prolonged. Optionally, the phase angle of the first blade 111 and the second blade 112 is preset to improve the cutting efficiency of the mowing blade. Alternatively, the phase angle of the first blade 111 and the second blade 112 is set to 90 degrees, and in the double blade cutting mode, the first blade 111 and the second blade 112 rotate synchronously at the phase angle of 90 degrees, so that the cutting efficiency of the lawn mower 100 can be improved. Through clutching mechanism's setting, the motor only needs design one can realize double knives and the operation of single-blade mode switch, and the power of motor need not set up too high or low excessively, also can make the lawn mower adapt to the scene of mowing of different operating modes, prevents that motor power from crossing low and making the easy stall of blade, or motor power is too high and lead to the lawn mower duration weak.

The lawn mower 100 further comprises a motor housing 150 supporting the motor 130 and the operating device 142, the motor 130 being disposed within the motor housing 150. When the operating device 142 actuates the clutch mechanism to switch between the first position and the second position, the operating device 142 is located at two different positions at the same time, and the operating device 142 can be fixed at the two positions by the motor housing 150. The motor housing 150 includes a first recess 151 and a second recess 152, and the operation device 142 further includes a resilient member 1422 disposed between the connecting rod 1421 of the operation device 142 and the motor housing 150, and the operation device 142 can be maintained in the first recess 151 and the second recess 152 by the cooperation of the resilient member 1422 and the motor housing 150, so that the operation device 142 can stabilize the transmission mechanism in the first position or the second position.

Optionally, at least one claw 1410 is disposed around the transmission member 141, and a ring gear 1501 is disposed inside the motor housing 150, wherein the claw 1410 can engage with the ring gear 1501 when the clutch mechanism is in the second position, thereby further preventing the transmission member from being driven by the connecting element through friction force when the clutch mechanism is in the second position, i.e., the single-blade cutting state of the lawn mower.

When the transmission clutch mechanism is moved from the second position to the first position by the operating device 142, i.e., when the operating device 142 moves in a direction opposite to the first direction 102, the projection 1431 and the chute 1411 are not aligned in the first direction 102, so that the projection 1431 cannot enter the chute 1411 and the transmission member and the connecting member 143 cannot be engaged, and the motor is started to drive the connecting member 143 to rotate, and when the projection 1431 and the chute 1411 are aligned in the first direction, the transmission member 141 is pressed by the elastic member 1422 so that the projection 1431 slides into the chute 1411, so that the clutch mechanism is positioned to the first position, at which time the second blade and the first blade rotate synchronously. The positions of the projection 1431 and the sliding groove 1411 are set so that when the transmission member is engaged with the connecting element, the phase angle of the first blade and the second blade is fixed, and optionally, the phase angle of the first blade and the second blade is set to be 90 degrees, so that the lawn trimmed by the mower is attractive and uniform, and the cutting capacity of the mower is improved. Optionally, the phase angles of the first blade and the second blade are set to other degrees, each time the clutch mechanism is in the first position, and the first blade and the second blade rotate synchronously, the first blade and the second blade rotate synchronously at a fixed phase angle, where the fixed phase angle means that the phase angles when the first blade and the second blade rotate are the same each time the clutch mechanism is in the first position, or the deviation of the phase angles when the first blade and the second blade rotate does not exceed 10 degrees each time the clutch mechanism returns to the first position again.

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 lawn mower, comprising:

a cutting device for performing a cutting function;

a chassis formed with an accommodating space accommodating at least a part of the cutting device;

the cutting device includes:

a first blade formed with a first blade edge for mowing;

a second blade formed with a second blade edge for cutting grass;

the method is characterized in that:

the lawn mower further comprises:

the motor comprises a motor shaft and can drive the first blade and the second blade to rotate;

and the clutch mechanism is connected with the first blade and can move to a first position and a second position, when the clutch mechanism is positioned at the first position, the first blade is directly or indirectly meshed with the motor shaft, and when the clutch mechanism is positioned at the second position, the first blade is disengaged from the motor shaft.

2. The mower of claim 1, wherein:

the clutch mechanism includes:

the transmission piece is fixedly connected with the first blade;

and the operating device can drive the transmission member to move so that the clutch mechanism moves between the first position and the second position.

3. The mower of claim 2, wherein:

the lawn mower further comprises: a coupling member coupled to the motor shaft, the transmission member engaging the coupling member when the clutch mechanism is in the first position.

4. A lawnmower as claimed in claim 3, wherein:

the motor shaft can rotate around a first axis;

the connecting element comprises a bump, the transmission piece comprises a sliding groove, and the bump can be separated from the sliding groove along a first direction.

5. The mower of claim 4, wherein:

the outer diameter of the connecting element tapers in a direction along the first axis toward the electric machine.

6. The mower of claim 4, wherein:

the transmission part comprises an annular groove, and the operating device comprises a shifting fork placed in the annular groove.

7. The mower of claim 6, wherein:

the shifting fork is provided with a spherical groove, and the clutch mechanism further comprises a ball arranged in the spherical groove.

8. The mower of claim 1, wherein:

the second blade is connected with the motor shaft and rotates synchronously with the motor shaft.

9. The mower of claim 2, wherein:

the lawn mower further comprises:

a motor housing supporting the motor and the operating device; the operating device further comprises an elastic piece, and the elastic piece is arranged in the motor shell.