Garden tool

Abstract

The utility model provides a gardening tool. The gardening tool comprises a machine body, at least two walking wheels and at least two motors. The at least two walking wheels comprise a first walking wheel mounted on the left side of the machine body and a second walking wheel mounted on the right side of the machine body; the at least two motors comprise a first motor for driving the first walking wheel and a second motor for driving the second walking wheel; the first motor drives the first walking wheel through the first speed reducer, the second motor drives the second walking wheel through the second speed reducer, the rated rotating speed of the first motor and the second motor ranges from 10 rpm to 4000 rpm, and the reduction ratio of the first speed reducer to the second speed reducer ranges from 1 to 200. Compared with the prior art, the garden tool has the advantages that the at least two motors can meet the use requirements of the garden tool, larger torque can be transmitted, the efficiency of the at least two motors is higher, and transmission is more stable.

Description

Technical Field

[0001] The utility model relates to a garden tool, in particular to a wheeled garden tool. Background Art

[0002] The driving wheels of the existing wheeled garden tools on the market generally use motors as power sources, and then convert and output a larger torque through a speed reducer to meet the working requirements. However, this structure occupies a large space and cannot reserve enough heat dissipation channels, resulting in poor heat dissipation, which will not only affect the service life of the equipment, but also affect the layout of other structures.

[0003] The existing wheeled garden tools use general hub motors as the power sources of the driving wheels, which solves the problems of large occupied space and poor heat dissipation. However, the no-load speed of such hub motors is relatively high. In order to meet the use requirements of wheeled garden tools, only the duty ratio of the motor can be reduced to reduce the motor speed, and at this time, the motor efficiency is relatively low.

[0004] In view of this, it is necessary to improve the existing wheeled garden tools to solve the above problems. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a garden tool, the motor of which can meet the use requirements of the garden tool, can transmit a larger torque, and has higher motor efficiency and more stable transmission.

[0006] To achieve the above purpose, the utility model provides a garden tool, including:

[0007] A fuselage;

[0008] At least two driving wheels, including a first driving wheel installed on the left side of the fuselage and a second driving wheel installed on the right side of the fuselage;

[0009] At least two motors, including a first driving wheel installed on the left side of the fuselage and a second driving wheel installed on the right side of the fuselage;

[0010] Wherein, the first motor drives the first driving wheel through a first speed reducer, the second motor drives the second driving wheel through a second speed reducer, the rated speeds of the first motor and the second motor are 10 rpm - 4000 rpm, and the reduction ratio ranges of the first speed reducer and the second speed reducer are 1 - 200.

[0011] As a further improvement of the utility model, at least a part of the first motor is located inside the first driving wheel, and at least a part of the second motor is located inside the second driving wheel.

[0012] As a further improvement of the present utility model, both the first motor and the second motor are outer rotor motors, and the rated speeds of the first motor and the second motor are 45 rpm - 2540 rpm.

[0013] As a further improvement of the present utility model, the first motor is installed inside the first traveling wheel, and the second motor is installed inside the second traveling wheel.

[0014] As a further improvement of the present utility model, both the first motor and the second motor are installed on the machine body.

[0015] As a further improvement of the present utility model, the gardening tool further includes a push rod installed on the machine body, and the push rod is provided with a control unit, and the control unit can control the first motor and the second motor.

[0016] As a further improvement of the present utility model, the reduction ratios of the first reducer and the second reducer range from 3 to 15.

[0017] As a further improvement of the present utility model, both the first reducer and the second reducer are planetary gearboxes.

[0018] As a further improvement of the present utility model, the first reducer and the second reducer have the same structure, and both include a housing, an internal gear ring fixed inside the housing, a planetary gear meshed with the internal gear ring, and a sun gear meshed with the planetary gear.

[0019] As a further improvement of the present utility model, the sun gear is fixed on the outer rotor of the corresponding motor. When the motor starts and the outer rotor rotates, it drives the sun gear to rotate, and drives the corresponding traveling wheel to rotate through the planetary gear and the internal gear ring.

[0020] As a further improvement of the present utility model, both ends of the housing are connected with a first end cover and a second end cover. A receiving space is formed between the first end cover, the second end cover and the housing. The motor and the corresponding reducer are received in the receiving space, and the internal gear ring is fixedly installed on the inner wall of the housing.

[0021] As a further improvement of the present utility model, the first end cover and the second end cover are respectively connected with the output shaft of the motor through a first bearing and a second bearing. The first end of the output shaft extends into the first end cover, and the second end of the output shaft extends out of the second end cover and is fixedly connected with the machine body.

[0022] As a further improvement of the present utility model, a supporting portion is formed inside the housing. The supporting portion is located between the motor and the corresponding reducer, and is annularly arranged outside the sun gear through a third bearing.

[0023] As a further improvement of the present utility model, a protruding spline structure is provided on the outer peripheral wall of the housing.

[0024] As a further improvement of the present utility model, the spline structure is arranged obliquely, and the inclination angle of the spline structure relative to the horizontal plane is 1° - 10°.

[0025] The beneficial effects of the present utility model are as follows: The gardening tool of the present utility model is provided with a first motor for driving the first traveling wheel and a second motor for driving the second traveling wheel. At the same time, the first motor is set to drive the first traveling wheel through a first speed reducer, and the second motor is set to drive the second traveling wheel through a second speed reducer. The rated speeds of the first motor and the second motor are set to 10 rpm - 4000 rpm, and the reduction ratio ranges of the first speed reducer and the second speed reducer are 1 - 200. Therefore, at least two motors in the present utility model can meet the usage requirements of the gardening tool, can transmit greater torque, and the efficiencies of the two motors are also higher, and the transmission is more stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is a three-dimensional structural schematic diagram of the gardening tool of the present utility model being a lawn mower.

[0027] Figure 2 is a three-dimensional structural schematic diagram of the gardening tool of the present utility model being a tiller.

[0028] Figure 3 is a three-dimensional structural schematic diagram of the gardening tool of the present utility model being a snow sweeper.

[0029] Figure 4 is Figure 1 a three-dimensional structural schematic diagram of the drive assembly in

[0030] Figure 5 is Figure 4 an exploded view of

[0031] Figure 6 is Figure 4 a sectional view of

[0032] Figure 7 is Figure 1 a sectional view of the traveling wheel and the motor in

[0033] Figure 8 is Figure 1 an exploded view of the traveling wheel and the drive assembly in

[0034] Figure 9 is Figure 7 a three-dimensional structural schematic diagram of the housing in

[0035] Figure 10 isFigure 7 Another perspective three-dimensional structural schematic diagram of the middle housing. Specific implementation manners

[0036] In order to make the objectives, technical solutions and advantages of the present utility model clearer, the present utility model will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0037] Please refer to Figures 1 - 3 As shown, the present utility model discloses a gardening tool 100, including but not limited to a lawn mower, a soil cultivator and a snow sweeper. In this embodiment, taking the lawn mower as an example, the gardening tool 100 includes a body 200, a battery assembly 300, a mowing assembly (not shown), a grass collection box 400, a push rod 500 and at least two traveling wheels 600. The battery assembly 300 is installed above the body 200 to supply power to the gardening tool 100. The mowing assembly is located on one side of the body 200 close to the ground. The grass collection box 400 is communicated with the mowing assembly for collecting weeds. The push rod 500 is installed on the body 200, specifically on both sides of the grass collection box 400. The push rod 500 is provided with a control unit 501 for controlling the operation of the gardening tool 100. At least two traveling wheels 600 are respectively located on both sides of the body 200, including a first traveling wheel 601 installed on the left side of the body 200 and a second traveling wheel 602 installed on the right side of the body 200.

[0038] As Figures 4 - 8 shown, the gardening tool 100 further includes at least two driving assemblies 700, and the driving assemblies 700 are installed in the rims of the corresponding traveling wheels 600 to drive the corresponding traveling wheels 600 to rotate. The gardening tool 100 of this embodiment includes two front traveling wheels and two rear traveling wheels, and the driving assemblies 700 are installed in the rims of both rear traveling wheels. That is to say, the above-mentioned first traveling wheel 601 and second traveling wheel 602 are both rear traveling wheels. Of course, in other alternative embodiments, the driving assemblies 700 may also be installed in the rims of the two front traveling wheels, and no limitation is made thereto.

[0039] The driving assembly 700 can meet the use requirements of the gardening tool 100 and can transmit a larger torque. The driving assembly 700 has a small volume. Installing the driving assembly 700 in the rim of the traveling wheel 600 can reduce the axial dimension of the traveling wheel 600, release more lateral space, facilitate the layout of other structures, and can also add other new functions to increase the functions of the whole machine, including but not limited to reserving sufficient heat dissipation channels for heat dissipation and prolonging the service life of the gardening tool 100.

[0040] The driving assembly 700 includes a motor 1 and a speed reducer 2. At least two driving assemblies 700 correspond to at least two motors 1 and at least two speed reducers 2. At least two motors 1 include a first motor for driving the first driving wheel 601 and a second motor for driving the second driving wheel 602. The first motor drives the first driving wheel 601 through a first speed reducer, the second motor drives the second driving wheel 602 through a second speed reducer, and the control unit 501 can control the first motor and the second motor. In this embodiment, at least a part of the first motor is located inside the first driving wheel 601, and at least a part of the second motor is located inside the second driving wheel 602.

[0041] In this embodiment, the structure of the first motor is the same as that of the second motor, the structure of the first speed reducer is the same as that of the second speed reducer, and the structure of the first driving wheel 601 is the same as that of the second driving wheel 602. For the convenience of description, in the following part of the specification, the motor 1 will directly refer to the first motor and the second motor, the speed reducer 2 will refer to the first speed reducer and the second speed reducer, and the driving wheel 600 will refer to the first driving wheel 601 and the second driving wheel 602.

[0042] The motor 1 is an outer-rotor motor, and the rated speed of the motor 1 is 10 rpm - 4000 rpm. The motor 1 includes an output shaft 11, an outer rotor 12 sleeved on the output shaft 11, and a stator 13 fixedly arranged on the output shaft 11. The outer rotor 12 is rotatably arranged on the outer periphery of the stator 13. The motor 1 is installed inside the driving wheel 600 and on the body 200, that is, one end of the output shaft 11 is fixedly connected to the body 200.

[0043] In this embodiment, the stator 13 includes a stator core and a core bracket. The core bracket is fixedly installed on the output shaft 11, the stator core is fixed on the core bracket, the outer rotor 12 is a magnetic conductive ring and is sleeved on the output shaft 11 through a rotor bearing 121. When the motor 1 starts, the outer rotor 12 rotates around the output shaft 11 through the rotor bearing 121. Optionally, the rated speed of the motor 1 is preferably 45 rpm - 2540 rpm. At this time, the motor 1 can meet the use requirements of the gardening tool 100 and can transmit a larger torque.

[0044] In this embodiment, the output shaft 11 is fixed and is provided with a stepped shape. One end face of the output shaft 11 close to the fuselage 200 is provided with a mounting hole 112 extending along the axial direction of the output shaft 11, and the mounting hole 112 penetrates out from the outside of the output shaft 11. The depth of the mounting hole 112 is approximately located at the middle position of the output shaft 11. When connecting and mounting the output shaft 11 to the fuselage 200, the mounting hole 112 is used for a fastener (not shown) to penetrate through to achieve the fixed mounting of the output shaft 11. The fastener can be a bolt, and there is no limit to the depth of the mounting hole 112 as long as it can satisfy the fixed mounting of the output shaft 11 to the fuselage 200.

[0045] The speed reducer 2 is a planetary gearbox, and the reduction ratio of the speed reducer 2 ranges from 1 to 200. The speed reducer 2 includes a housing 21, an internal gear ring 22 fixed inside the housing 21, a planetary gear 23 meshed with the internal gear ring 22, and a sun gear 24 meshed with the planetary gear 23. The sun gear 24 is sleeved on the output shaft 11, and the sun gear 24 is fixed on the outer rotor 12. When the motor 1 starts the outer rotor 12 to rotate, it drives the sun gear 24 to rotate, and drives the traveling wheel 600 to rotate through the planetary gear 23 and the internal gear ring 22.

[0046] Preferably, the sun gear 24 is provided with a first fixing hole (not shown), and the outer rotor 12 is correspondingly provided with a second fixing hole (not shown). The first fixing hole and the second fixing hole are aligned for a fastener (not shown) to be inserted to achieve the stable connection between the sun gear 24 and the outer rotor 12, and also make the transmission between the sun gear 24 and the outer rotor 12 more stable. In this embodiment, the reduction ratio of the speed reducer 2 preferably ranges from 3 to 15. At the same time, the input end of the speed reducer 2 is the output end of the motor 1, which improves the working efficiency of the motor 1.

[0047] The speed reducer 2 further includes a planet carrier 25. The planet carrier 25 is fixedly arranged on the output shaft 11. A plurality of the planetary gears 23 are provided. The plurality of planetary gears 23 are rotatably mounted on the planet carrier 25, and each planetary gear 23 is simultaneously meshed with the sun gear 24 and the internal gear ring 22. That is to say, the sun gear 24 is located between the plurality of planetary gears 23. In this embodiment, the number of the planetary gears 23 is 3 or 4, and the plurality of planetary gears 23 surround the sun gear 24 outside and are meshed with the sun gear 24.

[0048] The driving assembly 700 further includes a first end cover 3 and a second end cover 4. The first end cover 3 and the second end cover 4 are connected to both ends of the housing 21, and a receiving space (not labeled) is formed between the first end cover 3, the second end cover 4 and the housing 21. The motor 1 and the speed reducer 2 are received in the receiving space. The internal gear ring 22 is fixedly installed on the inner wall of the housing 21 to drive the housing 21, the first end cover 3 and the second end cover 4 to rotate through the planetary gear 23 and the internal gear ring 22. The first end cover 3 and the second end cover 4 are respectively connected to the output shaft 11 through a first bearing 31 and a second bearing 41. In this embodiment, the first end of the output shaft 11 extends into the first end cover 3, the second end of the output shaft 11 extends out of the second end cover 4 and is fixedly connected to the fuselage 200, and the speed reducer 2 is disposed close to the first end cover 3.

[0049] As Figures 8 - 10 shown, a support portion 211 is formed in the housing 21. The support portion 211 is located between the motor 1 and the speed reducer 2 and is disposed around the outside of the sun gear 24 through a third bearing 212. The support portion 211 is integrally formed with the housing 21. The support portion 211 divides the receiving space into a first receiving space and a second receiving space. The speed reducer 2 is received in the first receiving space, and the motor 1 is received in the second receiving space. The support portion 211 also further enhances the strength of the housing 21 and extends the service life of the housing 21.

[0050] In this embodiment, the traveling wheel 600 includes a tire 603. A protruding spline structure 213 is provided on the outer peripheral wall of the housing 21. The spline structure 213 is used to fix the tire 603. The spline structure 213 is disposed obliquely, and the inclination angle of the spline structure 213 with respect to the horizontal plane is 1° to 10°. A plurality of spline structures 213 are provided and are evenly disposed around the outer peripheral wall of the housing 21 to firmly fix the tire 603. The spline structure 213 may be inclined towards the fuselage 200 or away from the fuselage 200, and there is no limitation thereto as long as the fixation with the tire 603 can be achieved.

[0051] In summary, the gardening tool 100 of the present utility model is provided with a first motor for driving the first traveling wheel 601 and a second motor for driving the second traveling wheel 602. At the same time, the first motor is arranged to drive the first traveling wheel 601 through a first speed reducer, and the second motor is arranged to drive the second traveling wheel 602 through a second speed reducer. At the same time, the rated speeds of the first motor and the second motor are set to 10 rpm - 4000 rpm, and the reduction ratio ranges of the first speed reducer and the second speed reducer are 1 - 200. Therefore, at least two motors 1 in the present utility model can meet the usage requirements of the gardening tool 100, can transmit a larger torque, and the efficiency of at least two motors 1 is also higher, and the transmission is more stable.

[0052] The above embodiments are only used to illustrate the technical solutions of the present utility model and not to limit them. Although the present utility model has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present utility model can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present utility model.

Claims

1. A garden tool, characterized in that: include: body; At least two running wheels, including a first running wheel installed on the left side of the fuselage, and a second running wheel installed on the right side of the fuselage; At least two motors, including a first motor for driving the first running wheel, and a second motor for driving the second running wheel; Among them, the first motor drives the first traveling wheel through the first reducer, and the second motor drives the second traveling wheel through the second reducer. The rated speeds of the first motor and the second motor are 10rpm-4000rpm, and the reduction ratio of the first reducer and the second reducer ranges from 1-200.

2. The garden tool according to claim 1, characterized in that: The first motor is at least partially located in the first running wheel, and the second motor is at least partially located in the second running wheel.

3. The garden tool according to claim 1, characterized in that: The first motor and the second motor are both outer rotor motors, and the rated speeds of the first motor and the second motor are 45 rpm-2540 rpm.

4. The garden tool according to claim 1, characterized in that: The first motor is installed in the first running wheel, and the second motor is installed in the second running wheel.

5. The garden tool according to claim 1, characterized in that: The first motor and the second motor are both mounted on the fuselage.

6. The garden tool according to claim 1, characterized in that: The garden tool further comprises a push rod mounted on the body, the push rod is provided with a control unit, and the control unit can control the first motor and the second motor.

7. The garden tool according to claim 1, characterized in that: The reduction ratio of the first reducer and the second reducer ranges from 3 to 15.

8. The garden tool according to claim 1, characterized in that: The first reducer and the second reducer are both planetary gear boxes.

9. The garden tool according to claim 8, characterized in that: The first reducer and the second reducer have the same structure, and both include a housing, an inner gear ring fixed inside the housing, planetary gears meshingly connected to the inner gear ring, and a sun gear meshingly connected to the planetary gears.

10. The garden tool according to claim 9, characterized in that: The sun gear is fixed on the outer rotor of the corresponding motor. When the motor starts the outer rotor to rotate, the sun gear is driven to rotate, and the corresponding running wheel is driven to rotate through the planetary gear and the inner gear ring.

11. The garden tool according to claim 9, characterized in that: The two ends of the shell are connected with a first end cover and a second end cover, and a receiving space is formed between the first end cover, the second end cover and the shell. The motor and the corresponding reducer are received in the receiving space, and the inner gear ring is fixedly mounted on the inner wall of the shell.

12. The garden tool according to claim 11, characterized in that: The first end cover and the second end cover are connected to the output shaft of the motor through a first bearing and a second bearing respectively. The first end of the output shaft extends into the first end cover, and the second end of the output shaft extends out of the second end cover and is fixedly connected to the fuselage.

13. The garden tool according to claim 9, characterized in that: A support portion is formed in the housing, the support portion is located between the motor and the corresponding reducer, and is arranged on the outer side of the sun gear through a third bearing ring.

14. The garden tool according to claim 9, characterized in that: A protruding spline structure is provided on the outer peripheral wall of the shell.

15. The garden tool according to claim 14, characterized in that: The spline structure is arranged in an inclined shape, and the inclination angle of the spline structure compared to the horizontal plane is 1° to 10°.

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