CN215379928U - Garden tool - Google Patents
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- CN215379928U CN215379928U CN202121339069.9U CN202121339069U CN215379928U CN 215379928 U CN215379928 U CN 215379928U CN 202121339069 U CN202121339069 U CN 202121339069U CN 215379928 U CN215379928 U CN 215379928U
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Abstract
The utility model discloses a garden tool, which comprises a frame; the walking assembly comprises a first walking wheel assembly and a second walking wheel assembly which are connected with the frame; the first walking wheel assembly and/or the second walking wheel assembly comprise a driving wheel and a hub motor, the driving wheel is connected with the hub motor, and the hub motor is arranged on one side of the outer part of the frame; the working assembly is connected with the frame; a seat disposed on the frame; a battery pack that is drop-mounted on the frame and extends below the seat. The garden tool is driven by the hub motor, and the mounting space of the battery pack is enlarged by the cooperative design of the frame and the battery pack, so that the center of the whole garden tool is more reasonable.
Description
Technical Field
The utility model relates to the technical field of garden tools, in particular to a garden tool with a hub motor.
Background
The existing electrically-driven riding type mower products all adopt a mode that a driving motor and a gear box are added, in the structure, the driving motor and the gear box are an assembly, the gear box is installed on the side wall of a frame, a flange plate at the outer end of the gear box is connected with a rear wheel, one end of the driving motor is connected with the gear box, the other end of the driving motor is fixed on the frame, a battery pack is square and is installed at the tail part of the frame and positioned right above the driving motor, and the front end of the battery pack is arranged to a seat.
This structural design has the following problems:
1. the size and the weight of the driving motor and the gear box are large, and the driving motor is arranged in the frame, so that the space is occupied, and the installation and the replacement are inconvenient;
2. the battery pack is arranged above the driving motor, and after the mounting position is deviated, the center of the whole machine is deviated, so that the driving stability and climbing stability are not facilitated;
3. the battery pack is limited to insufficient installation space, the battery pack is led out from the upper part, the power wire harness is long, and potential safety hazards are increased;
4. the driving motor and the gear box are high in price;
5. part of efficiency loss of gear transmission is caused, gear oil needs to be maintained and replaced regularly, gear oil needs to be emptied during transportation, unnecessary waste is caused, and noise and abrasion are caused by gear engagement;
6. the driving motor is located the inside enclosure space of frame, and the thermal diffusivity is general.
SUMMERY OF THE UTILITY MODEL
In view of the above disadvantages of the prior art, an object of the present invention is to provide a gardening tool with a hub motor, which is used to solve the technical problems of inconvenient installation and replacement, high cost, unreasonable gravity center distribution of the whole machine, and poor driving stability and climbing stability of the driving structure adopting a driving motor and a gearbox in the prior art.
To achieve the above and other related objects, the present invention provides a gardening tool, comprising:
a frame;
the walking assembly comprises a first walking wheel assembly and a second walking wheel assembly which are connected with the frame;
the first walking wheel assembly and/or the second walking wheel assembly comprise a driving wheel and a hub motor, the driving wheel is connected with the hub motor, and the hub motor is arranged on one side of the outer part of the frame;
the working assembly is connected with the frame;
a seat disposed on the frame;
a battery pack that is drop-mounted on the frame and extends below the seat.
In an alternative embodiment of the utility model, the garden tool comprises a lawn mower.
In an alternative embodiment of the present invention, the working assembly includes a mowing assembly disposed at the bottom of the frame and between the first and second road wheel assemblies.
In an optional embodiment of the utility model, the frame is further provided with an anti-rolling assembly.
In an alternative embodiment of the present invention, the battery pack is a flat elongated shape.
In an optional embodiment of the utility model, the frame is further provided with an operating assembly.
In an optional embodiment of the utility model, the frame is further provided with an electric cabinet, and the electric cabinet is connected with the working assembly and the walking assembly.
In an alternative embodiment of the present invention, the front wheel assembly includes a front wheel rotatably connected to a front end of the frame and a steering mechanism for controlling steering of the front wheel.
In an optional embodiment of the utility model, the garden tool further comprises a power harness, one end of the power harness is connected with the front end of the battery pack, and the other end of the power harness is connected with the electric cabinet.
In an optional embodiment of the present invention, the first traveling wheel assembly is disposed at a front end of the frame, and the first traveling wheel assembly includes a front wheel and a steering mechanism for controlling steering of the front wheel; the second walking wheel assembly is arranged at the tail end of the frame and comprises the driving wheel and the hub motor.
In an alternative embodiment of the present invention, the seat is disposed between the first and second traveling wheel assemblies, and the battery pack is installed to a rear portion of the frame to extend below the seat.
In an optional embodiment of the utility model, the longitudinal distance between the front end surface of the battery pack and the transverse section of the wheel shaft of the driving wheel is 340-400 mm.
In an alternative embodiment of the utility model, the position of the center of gravity of the battery pack is located at a distance of between 60mm and 70mm from the axle of the driving wheel.
In an optional embodiment of the utility model, the height of the gravity center of the battery pack from the ground is between 400mm and 500 mm.
In an alternative embodiment of the present invention, the total length of the in-wheel motor is between 250mm and 310 mm.
In an alternative embodiment of the present invention, the weight of the in-wheel motor is between 42kg and 52 kg.
In an optional embodiment of the utility model, the hub motor is detachably connected with the frame.
In an optional embodiment of the present invention, the hub motor includes a motor stator shaft, a motor outer rotor, a first outer end cap, a second outer end cap, and a fixing bracket;
the first outer end cover is rotatably supported at one end of the motor stator shaft, the second outer end cover is rotatably supported at the middle part of the motor stator shaft, and two sides of the motor outer rotor are connected with the first outer end cover and the second outer end cover;
one end of the motor stator shaft extends out of the center of the second outer end cover, penetrates through the frame and is fixedly connected with the frame;
the fixed support is arranged on one side, far away from the first outer end cover, of the second outer end cover and is connected with the portion, extending out of the second outer end cover, of the motor stator shaft, and one end, far away from the second outer end cover, of the fixed support is connected with the frame.
In an optional embodiment of the utility model, the in-wheel motor further comprises a disc brake.
In an optional embodiment of the present invention, the in-wheel motor further includes a shaft sleeve, the shaft sleeve is sleeved on a portion of the motor stator shaft extending out of the second outer end cover, and the fixing bracket is disposed around the shaft sleeve and fixedly connected to an outer wall of the shaft sleeve.
In an optional embodiment of the utility model, one end of the fixing bracket, which is far away from the second outer end cover, is connected with the frame through a plurality of fixing bolts.
In an optional embodiment of the utility model, one end of the motor stator shaft extends from the second outer end cover, penetrates through the frame and is fixedly connected with the frame through a locking nut.
Compared with a motor gear box scheme, the hub motor of the garden tool saves 1/3-1/2 cost.
According to the garden tool, the total length of the hub motor is shorter than that of the driving motor and the gear box, the weight is lighter, the mass of a rear shaft is reduced, and the stability of the whole garden tool is better.
Compared with a motor gear box scheme, the garden tool has the advantages that the main body part of the hub motor is installed in the wheel rim, the whole wheel hub motor is located outside the frame, the installation space of the battery pack is larger, the gravity center position of the battery pack is lower and is closer to the rear shaft, so that the gravity center distribution of the whole garden tool is more reasonable, and the climbing stability is greatly improved.
According to the garden tool, the hub motor is completely arranged outside the frame and is connected with the frame through the fixing bolt and the locking nut, and the garden tool is convenient to mount and dismount.
According to the garden tool, the wheel hub motor directly drives the wheel, the efficiency is high, no transmission loss exists, gear oil is not needed, maintenance is not needed, and the garden tool is convenient to transport.
According to the garden tool, the hub motor is completely arranged on the outer side of the frame, the outer rotor of the motor rotates along with the wheel, and the heat dissipation performance is remarkably improved.
Compared with the scheme of the motor gear box, the garden tool has the advantages that the battery pack outlet wire is positioned on one side of the battery pack close to the electric cabinet, and the length of a power supply wire harness is greatly shortened.
Compared with the scheme of the motor gear box, the garden tool has the advantages that the surface areas of the upper surface and the lower surface of the battery pack structure are increased, and the heat dissipation capacity of the battery pack is improved.
Drawings
Fig. 1 is a schematic view illustrating a structure of a gardening tool according to the present invention.
Fig. 2 is a half sectional view showing a vertical plane through the rear wheel base of the garden tool of the present invention.
Fig. 3 is a cross-sectional view taken along a-a in fig. 2.
Fig. 4 shows a front view of the in-wheel motor of the present invention.
Fig. 5 shows a left side view of the in-wheel motor of the present invention.
Fig. 6 is a left side view of the in-wheel motor of the present invention shown in a cross-section taken along the direction B-B in fig. 5.
Fig. 7 is a schematic view of a mower driven by a driving motor and a gear box.
FIG. 8 shows a half-section view through the rear wheel base mid-plane of a lawnmower driven with a drive motor and gearbox.
Fig. 9 is a cross-sectional view taken along a-a in fig. 8.
A frame 10; a battery pack 20; rear wheel assemblies 30, 30'; a rear wheel 31; a hub motor 32; drive axles 32'; the motor outer rotor 321; a motor stator shaft 322; a shaft sleeve 3221; a first outer end cap 323; a second outer end cap 324; a lock nut 325; a fixing bolt 326; a fixed bracket 327; a disc brake 328; brake disc 3281; brake calipers 3282; flange bolts 329; a gear case 321'; a drive motor 322'; a mowing assembly 40; a front wheel assembly 50; a seat 60; an anti-roll assembly 70; an electric cabinet 80; a power supply harness 81; the steering assembly 90.
Detailed Description
The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The utility model is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention.
Please refer to fig. 1-9. It should be noted that the drawings provided in the present embodiment are only for illustrating the basic idea of the present invention, and the components related to the present invention are only shown in the drawings rather than drawn according to the number, shape and size of the components in actual implementation, and the type, quantity and proportion of the components in actual implementation may be changed freely, and the layout of the components may be more complicated.
Fig. 7-9 provide a lawnmower driven by a drive motor 322 'in the form of a gearbox 321'. The mower comprises a frame 10, a seat 60 arranged on the frame 10, a control assembly 90, a walking assembly, a mowing assembly 40, a battery pack 20 and an electric cabinet 80. The manipulating assembly 90 is disposed on the frame 10 at a position convenient for an operator to operate, and may include, for example, an electric manipulating unit (not shown) disposed on both sides of the seat 60 and a control panel (not shown) electrically connected to the electric manipulating unit, and is used for controlling the operation of the traveling assembly and the mowing assembly of the lawn mower. The walking assembly is used for moving the mower and comprises a pair of front wheels arranged at the front end of the bottom of the frame 10 and a pair of rear wheel assemblies 30' arranged at the rear positions of the bottom of the frame 10; the front wheels are universal wheels; the rear wheel assembly 30 ' comprises a driving motor 322 ', a gear box 321 ' and a rear wheel 31, the driving motor 322 ' and the gear box 321 ' are an assembly and are used as a driving axle 32 ', the gear box 321 ' is installed on the side wall of the frame 10, an outer end flange of the gear box 321 ' is connected with the rear wheel 31, the driving motor 322 ' is installed and fixed inside the frame 10, and an output shaft of the driving motor 322 ' penetrates through the side wall of the frame 10 and then is connected with the gear box 321 '. The electric cabinet 80 is arranged on the frame 10 and located below the seat 60, the electric cabinet 80 is connected with the mowing assembly 40 and the traveling assembly, and the electric cabinet 80 is used for controlling the working states of the mowing assembly 40 and the traveling assembly. The battery pack 20 is square, and the battery pack 20 is installed at the rear part of the frame 10, is positioned right above the driving motor 322 'of the driving axle 32', and is positioned at the front end of the driving axle to the seat 60.
This solution presents the following problems:
1. the driving motor 322 'and the gear box 321' are expensive;
2. the transaxle 32' has a relatively large length A (about 460nm) and a weight of about 70kg, all acting on the rear axle;
3. since the driving motor 322 'is installed inside the vehicle frame 10, the distance H1 (about 420nm) between the installation surface of the battery pack 20 and the ground is high, so that the battery pack 20 can only be installed in the adjustment range of the seat 60, the installation space of the battery pack 20 is L1 (about 620mm) × W1 (about 710mm) × H2 (about 30' 0mm), the longitudinal distance L2 between the front end surface of the battery pack 20 and the transverse section of the wheel shaft of the rear wheel 31 is about 100mm, L3 is a rear overhang distance, the distance B between the gravity center of the battery pack 20 and the wheel shaft is about 220mm, the height H3 between the gravity center of the battery pack 20 and the ground is about 620mm, and the installation position of the battery pack 20 is too far back, so that the rear shaft has large mass, which affects the driving stability and climbing stability;
4. the installation space of the battery pack 20 is limited to be insufficient, the wire outgoing mode of the battery pack 20 is upward wire outgoing, the power wire harness 81 between the battery pack 20 and the electric cabinet 80 is long, the potential safety hazard is increased, and the trend is shown in fig. 8;
5. because one end of the fixed driving motor 322 ' is deep into the frame 10, the mounting and replacing processes of the driving motor 322 ' and the gear box 321 ' are very complicated;
6. part of efficiency loss of gear transmission is caused, gear oil needs to be maintained and replaced regularly, gear oil needs to be emptied during transportation, unnecessary waste is caused, and noise and abrasion are caused by gear engagement;
7. drive motor 322' is located in the interior enclosure of frame 10 and is generally heat dissipative.
To solve the above problems, an embodiment of the present invention, as shown in fig. 1 to 6, introduces a lawnmower driven by an in-wheel motor 32. The mower comprises a frame 10, a seat 60 arranged on the frame 10, a control assembly 90, a walking assembly, a mowing assembly 40, a battery pack 20 and an electric cabinet 80. Wherein FIG. 1 shows a schematic structural view of a garden tool having an in-wheel motor 32; FIG. 2 shows a half-sectional view through the middle vertical plane of the wheelbase of the rear wheel 31 of the garden tool with the in-wheel motor 32; FIG. 3 is a cross-sectional view taken along the line A-A in FIG. 2; FIG. 4 shows a front view of the in-wheel motor 32; FIG. 5 shows a left side view of the in-wheel motor 32 of the present invention; fig. 6 shows a left side view of the in-wheel motor 32 of the present invention in a cross-section taken along the direction B-B in fig. 5.
The technical solution of the present invention will be described in detail below with reference to the accompanying drawings.
Referring to fig. 1-3, in the present embodiment, a seat 60 is disposed at an upper middle position of the frame 10 for an operator to sit on. The steering assembly 90 is located at a convenient location for the operator, such as on both sides of the seat 60, and is used to control the mower. The electric cabinet 80 is arranged on the frame 10 and below the seat 60, the electric cabinet 80 is connected with the mowing assembly 40 (serving as a working assembly) and the rear wheel assembly 30 of the walking assembly, and the electric cabinet 80 is used for controlling the working states of the mowing assembly 40 and the walking assembly.
Referring to fig. 1-3, in the present embodiment, the traveling assembly is used for moving the lawn mower, and includes a pair of front wheel assemblies 50 (first traveling wheel assemblies) disposed at the front end of the bottom of the frame 10 and a pair of rear wheel assemblies 30 (second traveling wheel assemblies) disposed at the rear position of the bottom of the frame 10. Front wheel assembly 50 is a driven wheel assembly that includes front wheels rotatably attached to the bottom front end of frame 10, such as universal wheels, and a steering mechanism for controlling the steering of the front wheels. As an example, the front wheel may be a smooth universal wheel to effectively avoid the influence of the front wheel on the working ground when the front wheel rotates.
Referring to fig. 1-3, in the present embodiment, the frame 10 is further provided with an anti-rolling assembly 70, the anti-rolling assembly 70 is disposed at the rear side of the seat 60 to prevent an operator from falling, and during the operation, the anti-rolling assembly 70 reduces the injury to the operator due to an accidental rollover, thereby greatly ensuring the personal safety of the operator.
Referring to fig. 1-3, in the present embodiment, the rear wheel assembly 30 is used as a driving wheel assembly, and includes a wheel hub motor 32 and a rear wheel 31, a main body portion of the wheel hub motor 32 is mounted in a rim of the rear wheel 31 through a flange bolt 329 (see fig. 6), and is integrally located outside the frame 10, and the rear wheel 31 is directly driven by the wheel hub motor 32. The traveling differential motion of the two rear wheels 31 can be controlled by the two in-wheel motors 32 respectively, so that the steering angle of the rear wheels 31 can be effectively increased, the steering radius of the rear wheel assembly 30 approaches to zero infinitely, and the practicability and the use performance of the mower are further improved.
Referring to fig. 1 to 6, in the present embodiment, the in-wheel motor 32 is mounted outside the frame 10, and is fixedly connected to the frame 10 by a fixing bolt 326 and a lock nut 325, which will be described later, so that the mounting and dismounting are convenient. The hub motor 32 includes a motor stator shaft 322, a motor outer rotor 321, a first outer end cover 323, a second outer end cover 324, a disc brake 328, and a fixing bracket 327. The motor stator shaft 322 is fixed, fixed with the frame 10, and located at the center of the motor outer rotor 321, the axial length of the motor stator shaft 322 is greater than that of the motor outer rotor 321, and one end of the motor stator shaft 322 extends out from the center of the second outer end cover 324, penetrates through the frame 10, and is fixedly connected with the frame 10 through the lock nut 325.
Referring to fig. 1 to 6, in the present embodiment, the motor outer rotor 321, the first outer end cap 323, and the second outer end cap 324 form a receiving cavity, wherein the first outer end cap 323 is supported at one end of the motor stator shaft 322 by a bearing (not labeled), the second outer end cap 324 is supported at the middle of the motor stator shaft 322 by another bearing (not labeled), and two sides of the motor outer rotor 321 are fixedly connected to the first outer end cap 323 and the second outer end cap 324 by bolts, respectively, so that the motor outer rotor 321, the first outer end cap 323, and the second outer end cap 324 can rotate together relative to the motor stator shaft 322.
Referring to fig. 1 to 6, in the present embodiment, the fixing bracket 327 is disposed on a side of the second outer end cover 324 away from the first outer end cover 323 and is fixedly connected to the shaft sleeve 3221, the shaft sleeve 3221 is sleeved on a portion of the motor stator shaft 322 extending out of the second outer end cover 324, the fixing bracket 327 is disposed around the shaft sleeve 3221, and an end of the fixing bracket 327 away from the second outer end cover 324 is fixedly connected to the frame 10 through the fixing bolt 326. By way of example, the fixing bracket 327 and the sleeve 3221 may be connected by welding. As an example, the number of the fixing bolts 326 may be four, for example.
Referring to fig. 1-6, in the present embodiment, the disc brake 328 includes a brake disc 3281 and a brake caliper 3282, the brake disc 3281 is disposed between the second outer end cover 324 and the frame 10, the brake disc 3281 is sleeved on the shaft sleeve 3221 or the motor stator shaft 322 and fixed with the second outer end cover 324 through a bolt, and the brake caliper 3282 is fixedly connected to the fixing bracket 327 and disposed at an edge of the brake disc 3281. During braking, high pressure brake fluid pushes the brake pads of brake caliper 3282 to grip brake disc 3281 to produce an actuating effect.
It should be noted that, compared with the driving scheme of the driving motor 322 'and the gear box 321', the in-wheel motor 32 is completely installed outside the frame 10, and is connected with the frame 10 by the fixing bolt 326 and the lock nut 325, so that the installation and the disassembly are simple and convenient; the wheel hub motor 32 directly drives the wheel, so that the efficiency is high, no transmission loss is caused basically, the transmission is more efficient, gear oil is not needed, maintenance is not needed, and the transportation is convenient; compared with the scheme of the driving motor 322 'and the gear box 321', the hub motor 32 can save cost of 1/3-1/2 and has lower cost; the total length D of the in-wheel motor is between 250mm and 310mm, such as 280mm, the weight of the in-wheel motor is between 42kg and 52kg, such as 47kg, the total length D of the in-wheel motor 32 is shorter than the total length A of a drive axle 32 ' (the drive motor 322 ' and the gear box 321 '), the weight can be reduced by about 1/3, the weight is lighter, the weight of a rear shaft is reduced, and the stability of the whole machine is better; because the in-wheel motor 32 is completely installed at the outer side of the frame 10, the in-wheel motor 32 rotates along with the wheel when working, and the heat dissipation capability is far better than the driving scheme of the driving motor 322 'and the gear box 321' installed inside the frame 10.
Referring to fig. 1-3, in the present embodiment, since the lawn mower directly drives the rear wheel 31 using two in-wheel motors 32, the main body portion of the in-wheel motor 32 is mounted in the rim (also referred to as a rim), and the in-wheel motor 32 can be completely mounted outside the frame 10.
Referring to fig. 1-3, in the present embodiment, the battery pack 20 is changed from the square shape shown in fig. 7-9 to the flat strip shape shown in fig. 1-3, so as to increase the volume of the battery pack 20, the battery pack 20 is installed in the frame 10 and extends to the right under the seat 60, and the longitudinal distance L5 from the front end surface of the battery pack 20 to the transverse section of the axle of the rear wheel 31 is between 340mm-400mm, such as 370 mm; the center of gravity of the battery pack 20 is located at a distance C of between 60mm and 70mm, such as 65mm, from the rear axle; the center of gravity of the battery pack 20 is located at a height H6 of between 400mm and 500mm, such as 450mm, from the ground.
The installation space of the battery pack 20 is increased by changing the structure of the frame 10, so that the gravity center of the battery pack 20 moves forwards, the gravity center of the battery pack 20 descends, the height of the position close to the gravity center of the whole machine, which is far away from the ground, is greatly reduced, the position is closer to the axle center of the rear wheel 31, and the gravity center of the whole machine moves to the optimal position (namely, the position which is half of the distance between the front axle and the rear axle), so that the driving stability and the climbing stability of the whole machine are improved. In addition, the battery pack 20 is flat and long, so that the surface areas of the upper surface and the lower surface can be increased, and the heat dissipation capacity of the battery pack 20 is improved.
Referring to fig. 1-3, in the present embodiment, a portion of the battery pack 20 is extended and installed under the seat 60, so that the battery pack 20 can be wired out from the front end, one end of the power harness 81 is connected to the front end of the battery pack 20, the other end is connected to the electric cabinet 80, and the direction of the power harness 81 is as shown in fig. 2, which can greatly shorten the length of the power harness 81 and improve the safety. To more intuitively illustrate the advantages of the present embodiment of a lawnmower driven by an in-wheel motor 32, a lawnmower driven by an in-wheel motor 32 (as shown in FIGS. 1-3) and a lawnmower driven by a drive motor 322 'with a gearbox 321' (as shown in FIGS. 7-9) of substantially the same size are compared.
As shown in fig. 7 to 9, in the lawnmower using the driving motor 322 'and the gear box 321', the distance H1 between the installation surface of the battery pack 20 and the ground is about 420nm, the installation space of the battery pack 20 is L1 (about 620mm) × W1 (about 710mm) × H2 (about 300mm), L3 is the rear overhang distance, the longitudinal distance L2 between the front end surface of the battery pack 20 and the transverse plane of the rear wheel 31 shaft is about 100mm, the distance B between the gravity center position of the battery pack 20 and the rear shaft is about 220mm, and the height H3 between the gravity center position of the battery pack 20 and the ground is about 620 mm.
As shown in fig. 1-3, in the lawn mower driven by the in-wheel motor 32, the installation space of the battery pack 20 is increased by modifying the structure of the vehicle frame 10, the distance H4 between the installation surface of the battery pack 20 and the ground is about 330mm, the installation space of the battery pack 20 is L4(860mm) W1(710mm) H5(240mm), the length of the battery pack 20 is increased by 40%, the capacity is increased by 1/3, the longitudinal distance L5 between the front end surface of the battery pack 20 and the transverse plane of the wheel axle of the rear wheel 31 is about 370mm, L3 is constant for the rear overhang length, the distance C between the gravity center of the battery pack 20 and the rear axle is about 65mm, the height H6 between the gravity center of the battery pack 20 and the ground is about 450mm, the gravity center of the battery pack 20 is moved forward by 135mm, and the gravity center of the battery pack 20 is lowered by 170mm, and the gravity center of the whole lawn mower is close to the optimal position (i.e. the half of the front-rear-axle distance), the gravity center height of the whole machine is reduced by about 40mm, and the climbing stability is greatly increased.
In a lawnmower using a drive motor 322 ' and a gearbox 321 ', as shown in fig. 7-9, the transaxle 32 ' has a large length a (about 460mm) and weighs about 70kg, all of which act on the rear axle. As shown in fig. 1-3, in the mower driven by the in-wheel motor 32, the overall length D of the in-wheel motor 32 is about 280mm, the weight is about 47kg, which is 40% shorter than the driving motor 322 'plus the gearbox 321', the weight is about 1/3, the mass of the rear axle is reduced, and the stability of the whole mower is better.
Compared with a mower driven by the in-wheel motor 32 and adopting the driving motor 322 'and the gear box 321', the mower driven by the in-wheel motor 32 adopts the structure that the wires are led out from the front end of the battery pack 20, one end of the power wire harness 81 is connected with the front end of the battery pack 20, the other end of the power wire harness 81 is connected with the electric cabinet 80, the trend of the power wire harness 81 is changed to be as shown in fig. 2, the length of the power wire harness 81 is shortened by about 400mm, and the safety is improved.
Although the lawn mower of the present embodiment uses the rear wheel driven by the in-wheel motor 32 as the driving wheel, it is understood that in other embodiments, the lawn mower may use the front wheel driven by the in-wheel motor 32 as the driving wheel, and the battery pack 20 is mounted to the front portion of the frame 10 to extend below the seat 60.
Although the present embodiment is described by taking a lawn mower as an example, it should be understood that the design concept of the lawn mower with the in-wheel motor 32 of the present embodiment can also be applied to other garden tools, as the garden tool with the in-wheel motor 32, the frame 10 and the battery pack 20 of the garden tool can refer to the similar design, and the specific type of the working components of the garden tool can be selected according to actual needs.
In conclusion, compared with the motor and gear box scheme, the garden tool provided by the utility model has the advantage that 1/3-1/2 cost is saved by the hub motor. According to the garden tool, the total length of the hub motor is shorter than that of the driving motor and the gear box, the weight is lighter, the mass of a rear shaft is reduced, and the stability of the whole garden tool is better. Compared with a motor gear box scheme, the garden tool has the advantages that the main body part of the hub motor is installed in the wheel rim, the whole wheel hub motor is located outside the frame, the installation space of the battery pack is larger, the gravity center position of the battery pack is lower and is closer to the rear shaft, so that the gravity center distribution of the whole garden tool is more reasonable, and the climbing stability is greatly improved. According to the garden tool, the hub motor is completely arranged outside the frame and is connected with the frame through the fixing bolt and the locking nut, and the garden tool is convenient to mount and dismount. According to the garden tool, the wheel hub motor directly drives the wheel, the efficiency is high, no transmission loss exists, gear oil is not needed, maintenance is not needed, and the garden tool is convenient to transport. According to the garden tool, the hub motor is completely arranged on the outer side of the frame, the outer rotor of the motor rotates along with the wheel, and the heat dissipation performance is remarkably improved. Compared with the scheme of the motor gear box, the garden tool has the advantages that the battery pack outlet wire is positioned on one side of the battery pack close to the electric cabinet, and the length of a power supply wire harness can be shortened. Compared with the scheme of driving the motor gear box, the garden tool has the advantages that the surface areas of the upper surface and the lower surface of the battery pack structure are increased, and the heat dissipation capacity of the battery pack is improved.
In the description herein, numerous specific details are provided, such as examples of components and/or methods, to provide a thorough understanding of embodiments of the utility model. One skilled in the relevant art will recognize, however, that an embodiment of the utility model can be practiced without one or more of the specific details, or with other apparatus, systems, assemblies, methods, components, materials, parts, and/or the like. In other instances, well-known structures, materials, or operations are not shown or described in detail to avoid obscuring aspects of embodiments of the utility model.
It will also be appreciated that one or more of the elements shown in the figures can also be implemented in a more separated or integrated manner, or even removed for inoperability in some circumstances or provided for usefulness in accordance with a particular application.
Additionally, any reference arrows in the drawings/figures should be considered only as exemplary, and not limiting, unless otherwise expressly specified. Further, as used herein, the term "or" is generally intended to mean "and/or" unless otherwise indicated. Combinations of components or steps will also be considered as being noted where terminology is foreseen as rendering the ability to separate or combine is unclear.
The above description of illustrated embodiments of the utility model, including what is described in the abstract of the specification, is not intended to be exhaustive or to limit the utility model to the precise forms disclosed herein. While specific embodiments of, and examples for, the utility model are described herein for illustrative purposes only, various equivalent modifications are possible within the spirit and scope of the present invention, as those skilled in the relevant art will recognize and appreciate. As indicated, these modifications may be made to the present invention in light of the foregoing description of illustrated embodiments of the present invention and are to be included within the spirit and scope of the present invention.
The systems and methods have been described herein in general terms as the details aid in understanding the utility model. Furthermore, various specific details have been given to provide a general understanding of the embodiments of the utility model. One skilled in the relevant art will recognize, however, that an embodiment of the utility model can be practiced without one or more of the specific details, or with other apparatus, systems, assemblies, methods, components, materials, parts, and/or the like. In other instances, well-known structures, materials, and/or operations are not specifically shown or described in detail to avoid obscuring aspects of embodiments of the utility model.
Thus, although the present invention has been described herein with reference to particular embodiments thereof, a latitude of modification, various changes and substitutions are intended in the foregoing disclosures, and it will be appreciated that in some instances some features of the utility model will be employed without a corresponding use of other features without departing from the scope and spirit of the utility model as set forth. Thus, many modifications may be made to adapt a particular situation or material to the essential scope and spirit of the present invention. It is intended that the utility model not be limited to the particular terms used in following claims and/or to the particular embodiment disclosed as the best mode contemplated for carrying out this invention, but that the utility model will include any and all embodiments and equivalents falling within the scope of the appended claims. Accordingly, the scope of the utility model is to be determined solely by the appended claims.
Claims (19)
1. A garden tool, comprising:
a frame;
the walking assembly comprises a first walking wheel assembly and a second walking wheel assembly which are connected with the frame;
the first walking wheel assembly and/or the second walking wheel assembly comprise a driving wheel and a hub motor, the driving wheel is connected with the hub motor, and the hub motor is arranged on one side of the outer part of the frame;
the working assembly is connected with the frame;
a seat disposed on the frame;
a battery pack that is drop-mounted on the frame and extends below the seat.
2. The garden tool of claim 1, wherein the garden tool comprises a lawn mower.
3. The garden tool of claim 1, wherein the frame is further provided with an anti-roll assembly.
4. The garden tool of claim 1, wherein the battery pack is a flat elongated strip.
5. The gardening tool according to claim 1, wherein an electric cabinet is further arranged on the frame, and the electric cabinet is connected with the working assembly and the walking assembly.
6. The garden tool of claim 5, further comprising a power harness, one end of the power harness being connected to the front end of the battery pack and the other end of the power harness being connected to the electrical cabinet.
7. The gardening tool according to claim 1, wherein the first traveling wheel assembly is provided at a front end of the frame, the first traveling wheel assembly comprising a front wheel and a steering mechanism for controlling steering of the front wheel; the second walking wheel assembly is arranged at the tail end of the frame and comprises the driving wheel and the hub motor.
8. The gardening tool of claim 7, wherein the seat is disposed between the first and second walking wheel assemblies, and the battery pack is mounted to the rear of the frame and extends below the seat.
9. The garden tool of claim 7, wherein the front face of the battery pack is longitudinally spaced from the axle of the drive wheel by a distance of between 340mm and 400 mm.
10. The garden tool of claim 7, wherein the center of gravity of the battery pack is located between 60mm and 70mm from the axle of the drive wheel.
11. The gardening tool according to claim 7, wherein the center of gravity of the battery pack is located at a height of 400mm-500mm from the ground.
12. The garden tool of claim 7, wherein the hub motor has an overall length of between 250mm-310 mm.
13. The garden tool of claim 7, wherein the hub motor weighs between 42kg-52 kg.
14. The garden tool of claim 1, wherein the in-wheel motor is removably coupled to the frame.
15. The garden tool of claim 1, wherein the hub motor comprises a motor stator shaft, a motor outer rotor, a first outer end cap, a second outer end cap and a fixing bracket;
the first outer end cover is rotatably supported at one end of the motor stator shaft, the second outer end cover is rotatably supported at the middle part of the motor stator shaft, and two sides of the motor outer rotor are connected with the first outer end cover and the second outer end cover;
one end of the motor stator shaft extends out of the center of the second outer end cover, penetrates through the frame and is fixedly connected with the frame;
the fixed support is arranged on one side, far away from the first outer end cover, of the second outer end cover and is connected with the portion, extending out of the second outer end cover, of the motor stator shaft, and one end, far away from the second outer end cover, of the fixed support is connected with the frame.
16. The garden tool of claim 15, wherein the in-wheel motor further comprises a disc brake.
17. The garden tool of claim 15, wherein the in-wheel motor further comprises a bushing, the bushing is sleeved on a portion of the motor stator shaft extending out of the second outer end cover, and the fixing bracket is disposed around the bushing and fixedly connected with an outer wall of the bushing.
18. The garden tool of claim 15, wherein the end of the fixing bracket remote from the second outer end cap is connected to the frame by a plurality of fixing bolts.
19. The garden tool of claim 15, wherein one end of the motor stator shaft extends from the second outer end cap, and is fixedly connected to the frame through a lock nut after passing through the frame.
Priority Applications (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121339069.9U CN215379928U (en) | 2021-06-16 | 2021-06-16 | Garden tool |
| PCT/CN2022/098906 WO2022262762A1 (en) | 2021-06-16 | 2022-06-15 | Mower |
| CA3221907A CA3221907A1 (en) | 2021-06-16 | 2022-06-15 | Mower |
| AU2022293632A AU2022293632A1 (en) | 2021-06-16 | 2022-06-15 | Mower |
| EP22824238.4A EP4356710A1 (en) | 2021-06-16 | 2022-06-15 | Mower |
| US18/536,143 US20240099196A1 (en) | 2021-06-16 | 2023-12-11 | Mower |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121339069.9U CN215379928U (en) | 2021-06-16 | 2021-06-16 | Garden tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215379928U true CN215379928U (en) | 2022-01-04 |
Family
ID=79639665
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121339069.9U Active CN215379928U (en) | 2021-06-16 | 2021-06-16 | Garden tool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215379928U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022262762A1 (en) * | 2021-06-16 | 2022-12-22 | 格力博(江苏)股份有限公司 | Mower |
-
2021
- 2021-06-16 CN CN202121339069.9U patent/CN215379928U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022262762A1 (en) * | 2021-06-16 | 2022-12-22 | 格力博(江苏)股份有限公司 | Mower |
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