阅读说明：本技术 自走式轻型滚刀剪草机 (Self-propelled light hob mower ) 是由 曹惠昌 李敏 郭超 于 2020-12-25 设计创作，主要内容包括：本发明公开一种自走式轻型滚刀剪草机,该剪草机包括电源模块和机架,机架上设有扶手和控制模块,机架的前端设有滚刀总成和行走机构；电源模块为剪草机提供电力；控制模块用于控制滚刀总成和行走机构的工作状态；行走机构包括至少一对行走轮,对称设置在机架的前端两侧,至少一对行走轮中包括至少一个单边轴轮毂电机；滚刀总成包括滚刀刀片和滚刀轴,滚刀刀片通过多个支撑板固定连接滚刀轴,滚刀轴至少一端设有外转子电机；外转子电机包括定子总成和外转子,定子总成通过连接件连接机架,外转子固定连接支撑板。本发明工作效率高,整机结构更加紧凑。(The invention discloses a self-propelled light hob mower, which comprises a power module and a rack, wherein the rack is provided with a handrail and a control module, and the front end of the rack is provided with a hob assembly and a travelling mechanism; the power supply module provides power for the lawnmower; the control module is used for controlling the working states of the hob assembly and the travelling mechanism; the travelling mechanism comprises at least one pair of travelling wheels which are symmetrically arranged at two sides of the front end of the frame, and the at least one pair of travelling wheels comprises at least one unilateral shaft hub motor; the hobbing cutter assembly comprises a hobbing cutter blade and a hobbing cutter shaft, the hobbing cutter blade is fixedly connected with the hobbing cutter shaft through a plurality of supporting plates, and at least one end of the hobbing cutter shaft is provided with an outer rotor motor; the outer rotor motor comprises a stator assembly and an outer rotor, the stator assembly is connected with the rack through a connecting piece, and the outer rotor is fixedly connected with the supporting plate. The invention has high working efficiency and more compact structure of the whole machine.)

1. A self-propelled light-duty hobbing cutter lawnmower is characterized in that the lawnmower comprises a power module and a rack, wherein the rack is provided with a handrail and a control module, and the front end of the rack is provided with a hobbing cutter assembly and a travelling mechanism;

the power supply module provides power for the lawnmower;

the control module is used for controlling the working states of the hob assembly and the travelling mechanism;

the travelling mechanism comprises at least one pair of travelling wheels which are symmetrically arranged at two sides of the front end of the rack, and the at least one pair of travelling wheels comprises at least one unilateral shaft hub motor;

the hob assembly comprises an outer rotor motor, a hob blade and a hob shaft, the hob blade is fixedly connected with the hob shaft through a plurality of supporting plates, and the outer rotor motor is arranged at least one end of the hob shaft; the outer rotor motor comprises a stator assembly and an outer rotor, the stator assembly is connected with the rack through a connecting piece, the outer rotor is fixedly connected with the supporting plate, and the plurality of hob blades are spiral.

2. The self-propelled light-duty hob lawnmower according to claim 1, wherein the connecting member is a motor shaft, the hob shaft is hollow and cylindrical, and the motor shaft is inserted into the hob shaft with both ends thereof extending; the two ends of the motor shaft are respectively provided with a flat position and are fixedly connected with the rack through the flat positions.

3. The self-propelled light-weight hob lawnmower according to claim 2, wherein the outer rotor motor is provided at one end of the hob shaft, the outer rotor motor is disposed in a motor compartment, and the stator assembly is circumferentially retained on the motor shaft by a key.

4. The self-propelled light-weight rotary-cutter lawnmower of claim 3, wherein the motor compartment is integral with the roller shaft retention; the motor cabin is provided with an opening facing to the outside, and the outer rotor motor is installed in the motor cabin from the opening.

5. The self-propelled light-weight hob lawnmower according to claim 4, wherein the outer rotor motor has an end cap on the outside, the end cap being integrally formed with the outer rotor of the outer rotor motor and cooperating with the motor compartment to seal the outer rotor motor within the motor compartment.

6. The self-propelled light-weight rotary knife lawnmower of claim 5, wherein the end cap has a first bearing centrally mounted thereon, and the motor shaft is coupled to and passes through the first bearing.

7. The self-propelled light-weight hob mower according to claim 6, wherein said roller shaft is provided at an end thereof remote from said motor compartment with a bearing assembly, said bearing assembly comprising a bearing housing and a second bearing located within said bearing housing, said bearing housing being fixedly attached to said roller shaft, said motor shaft being connected to and passing through said second bearing.

8. The self-propelled light-weight rotary knife lawnmower of claim 1, wherein the control module comprises a potentiometer, a travel motor controller, and a rotary knife motor controller; the potentiometer is electrically connected with the walking motor controller and the hob motor controller respectively; the walking motor controller is electrically connected with the at least one unilateral shaft hub motor; and the hob motor controller is electrically connected with the outer rotor motor.

9. The self-propelled light-weight rotary-cutter lawnmower of claim 8,

the minimum working speed of the outer rotor motor is V_aminMaximum working speed is V_amax；

The minimum working speed of the single-side shaft hub motor is V_bminMaximum working speed is V_bmax；

Wherein, V_amin/V_bmin＝K，V_amax/K＜V_bmax；

The control unit is configured to:

after the grass mower is started, the working speed V of the outer rotor motor is adjusted by adjusting the potentiometer_aCan be composed of V_aminAdjusted to V_amaxAnd in the process, the speed V of the single-side shaft hub motor_bSatisfy V_a/V_bK; when the working speed of the external rotor motor reaches V_amaxThen, the regulation station is continuedThe potentiometer can maintain the working speed of the outer rotor motor to be V_amaxAnd the speed V of the single-side shaft hub motor_bCan be composed of V_amaxAdjustment of/K to V_bmax。

10. The self-propelled light-weight rotary-cutter lawnmower of any one of claims 1 to 9, wherein the rear side of the rotary-cutter assembly is provided with a grass bag; and/or the presence of a gas in the gas,

the front end of the frame is also provided with a roller assembly, and the roller assembly is positioned on the front side or the rear side of the hob assembly.

Technical Field

The invention relates to the technical field of lawnmowers, in particular to a self-propelled light hob lawnmower.

Background

In recent years, the requirements for home garden lawn trimming are higher and higher, and the light hob lawnmower is more and more popular with home users. However, in the light hob mower in the market, the hob part and the walking part of the light hob mower share one motor for driving, and as the walking wheel is linked with the hob through an internal gear, the rotating speed of the hob is limited, the shearing frequency is low, and the grass cutting effect is poor; and the existing hob is inconvenient to disassemble and assemble, and the later maintenance workload is large.

Therefore, there is a need in the art for a new lawnmower that solves the above problems.

Disclosure of Invention

The invention aims to provide a self-propelled light hob mower, wherein a hob and a walking part are controlled independently and jointly, the structure is simple, the assembly and disassembly are easy, in addition, the hob part is driven by a built-in outer rotor motor, the transmission structure is further simplified, the working efficiency is improved, and the whole structure is more compact.

In order to achieve the purpose, the invention adopts the following technical scheme:

a self-propelled light-duty hobbing cutter lawnmower comprises a power module and a rack, wherein the rack is provided with a handrail and a control module, and the front end of the rack is provided with a hobbing cutter assembly and a travelling mechanism; the power supply module provides power for the lawnmower; the control module is used for controlling the working states of the hob assembly and the travelling mechanism; the travelling mechanism comprises at least one pair of travelling wheels which are symmetrically arranged at two sides of the front end of the rack, and the at least one pair of travelling wheels comprises at least one unilateral shaft hub motor; the hob assembly comprises an outer rotor motor, a hob blade and a hob shaft, the hob blade is fixedly connected with the hob shaft through a plurality of supporting plates, and the outer rotor motor is arranged at least one end of the hob shaft; the outer rotor motor comprises a stator assembly and an outer rotor, the stator assembly is connected with the rack through a connecting piece, the outer rotor is fixedly connected with the supporting plate, and the plurality of hob blades are spiral.

In one embodiment, the connecting piece is a motor shaft, the roller shaft is in a hollow cylinder shape, and the motor shaft penetrates through the roller shaft and extends out of two ends of the motor shaft; the two ends of the motor shaft are respectively provided with a flat position and are fixedly connected with the rack through the flat positions.

In one embodiment, the outer rotor motor is arranged at one end of the roller shaft, the outer rotor motor is arranged in a motor bin, and the stator assembly is circumferentially limited on the motor shaft through a key.

In one embodiment, the motor cartridge is integral with the roller shaft retention; the motor cabin is provided with an opening facing to the outside, and the outer rotor motor is installed in the motor cabin from the opening.

In one embodiment, the outer side of the outer rotor motor is provided with an end cover, and the end cover is integrally formed with the outer rotor of the outer rotor motor and is matched with the motor bin so as to seal the outer rotor motor in the motor bin.

In one embodiment, the end cap has a first bearing centrally mounted thereon, and the motor shaft is connected to and passes through the first bearing.

In one embodiment, a bearing assembly is arranged at one end of the roller shaft, which is far away from the motor cabin, the bearing assembly comprises a bearing seat and a second bearing located in the bearing seat, the bearing seat is fixedly connected with the roller shaft, and the motor shaft is connected with and penetrates through the second bearing.

In one embodiment, the control module comprises a potentiometer, a walking motor controller and a hob motor controller; the potentiometer is electrically connected with the walking motor controller and the hob motor controller respectively; the walking motor controller is electrically connected with the at least one unilateral shaft hub motor; and the hob motor controller is electrically connected with the outer rotor motor.

In one embodiment, the minimum working speed of the external rotor motor is V_aminMaximum working speed is V_amax(ii) a The minimum working speed of the single-side shaft hub motor is V_bminMaximum working speed is V_bmax(ii) a Wherein, V_amin/V_bmin＝K，V_amax/K＜V_bmax(ii) a The control unit is configured to: after the grass mower is started, the working speed V of the outer rotor motor is adjusted by adjusting the potentiometer_aCan be composed of V_aminAdjusted to V_amaxAnd in the process, the speed V of the single-side shaft hub motor_bSatisfy V_a/V_bK; when the working speed of the external rotor motor is reachedV_amaxThen, the potentiometer is continuously adjusted, and the working speed of the outer rotor motor can be kept at V_amaxAnd the speed V of the single-side shaft hub motor_bCan be composed of V_amaxAdjustment of/K to V_bmax。

In one embodiment, a straw bag is arranged at the rear side of the hob assembly; and/or the front end of the frame is also provided with a roller assembly, and the roller assembly is positioned on the front side or the rear side of the hob assembly.

The invention has the advantages that:

according to the self-propelled light hob grass mower provided by the invention, the hob and the traveling part are driven by the independent motor, a transmission structure between the hob and the traveling part is omitted, and the self-propelled light hob grass mower is simple in structure and easy to disassemble, assemble and maintain. And the hob part is driven by a built-in outer rotor motor, so that the transmission structure is simplified, the working efficiency is improved, and the structure of the whole machine is more compact.

Furthermore, the self-propelled light hob grass mower provided by the invention keeps a proportional relation between the travelling speed and the hob rotating speed in the early stage in speed control, so that a constant shearing frequency is ensured, the shearing effect is ensured, and no power loss is generated.

Drawings

FIG. 1 is a schematic perspective view of a self-propelled light-weight rotary-cutter lawnmower according to the present invention;

FIG. 2 is a schematic top view of a self-propelled light-weight rotary-cutter lawnmower according to the present invention;

FIG. 3 is a schematic view of a hob assembly according to the present invention;

FIG. 4 is a graph showing the relationship between the rotational speed of a hob and the speed of a user;

fig. 5 is a schematic perspective view of another self-propelled light-weight rotary-cutter lawnmower according to the present invention.

Detailed Description

Referring to fig. 1 and 2, fig. 1 and 2 illustrate the main structure of a self-propelled light hob lawnmower 10. The self-propelled light-weight hob mower 10 provided by the present embodiment mainly includes a power module 20 and a frame 30, wherein the frame 30 is provided with an armrest 31 and a control module 32, and the front end of the frame 30 is provided with a hob assembly 40 and a traveling mechanism 50. The power module 20 provides power to the lawnmower 10.

The traveling mechanism 50 includes at least one pair of traveling wheels 51 symmetrically disposed on two sides of the front end of the frame 30, and the at least one pair of traveling wheels 51 includes at least one single-side-shaft hub motor. In this embodiment, the traveling mechanism 50 includes a pair of traveling wheels 51 symmetrically disposed on both sides of the front end of the frame 30. More specifically, two road wheels 51 are also located on either side of hob assembly 40 and are exposed outside of housing 30. The two road wheels 51 may both be fitted with single-axis hub motors, i.e. two-wheel drive. One of the two road wheels 51 may be provided with a single-shaft hub motor, i.e., a single-wheel drive. It should be noted that the number of the road wheels 51 may be one pair, two pairs, or more pairs, which is not limited herein.

Referring to FIG. 3, FIG. 3 illustrates the main structure of the hob assembly. As shown in fig. 3, hob assembly 40 includes an outer rotor motor 41, hob blades 42 and a hob shaft 43. The plurality of hob blades 42 are formed in a spiral shape, and the hob blades 42 are fixedly connected to the hob shaft 43 through a plurality of support plates 44. At least one end of the roller shaft 43 is provided with the outer rotor motor 41, that is, both ends of the roller shaft 43 can be provided with the outer rotor motor 41, or only one end of the roller shaft 43 can be provided with the outer rotor motor 41. The outer rotor motor 41 comprises a stator assembly 45 and an outer rotor 46, the stator assembly 45 is connected with the frame 30 through a connecting piece 47, and the outer rotor 46 is fixedly connected with the supporting plate 44.

In this embodiment, the hob blade 42, the hob shaft 43 and the supporting plate 44 are fixedly connected by welding. The connecting piece 47 is a motor shaft 70, the roller shaft 43 is hollow cylinder, and the motor shaft 70 is arranged in the roller shaft 43 in a penetrating way and two ends of the motor shaft extend out. The two ends of the motor shaft 70 are both provided with flat positions and are fixedly connected with the frame 30 through the flat positions. One end of the roller shaft 43 is provided with an outer rotor motor 41, the outer rotor motor 41 is arranged in a motor chamber 48, and the stator assembly 45 is circumferentially limited on a motor shaft 70 through a key 60. The motor chamber 48 is fixed with the roller shaft 43 into a whole; motor compartment 48 has an opening facing outward, and outer rotor motor 41 is mounted in motor compartment 48 from the opening. Outer rotor 46 is fixedly connected to support plate 44 on motor compartment 48, and is further fixedly connected to hob blade 42 and hob shaft 43. More specifically, the outer rotor 46 is fixedly connected to the support plate 44 near the end of the hob blade 42 by means of a fixing bolt 65. That is, the outer rotor 46 is fixedly connected to the support plate 44 on the motor compartment 48 by the fixing bolt 65. It should be noted that the outer rotor 46 may be directly fixedly connected to the hob shaft 43 or the hob blade 42 and further fixedly connected to the supporting plate 44.

An end cover 49 is arranged outside the outer rotor motor 41, and the end cover 49 is integrally formed with the outer rotor 46 of the outer rotor motor 41 and is matched with the motor bin 48 so as to seal the outer rotor motor 41 in the motor bin 48. The end cover 49 has a first bearing 61 mounted at the center thereof, and the motor shaft 70 is connected to and passes through the first bearing 61. The end of the roller shaft 43 away from the motor chamber 48 is provided with a bearing assembly, the bearing assembly comprises a bearing seat 63 and a second bearing 64 positioned in the bearing seat 63, the bearing seat 63 is fixedly connected with the roller shaft 43, and a motor shaft 70 is connected with and penetrates through the second bearing 64.

To ensure the assembly accuracy of outer rotor motor 41, outer rotor 46 and its integrally formed end cap 49 are form fit with motor compartment 48, while the bearing housing at the other end is form fit with roller shaft 43 to ensure concentricity of the overall structure. In use, the stator assembly 45 is secured to the motor shaft 70 by the key 60 and remains stationary. And the outer rotor 46 is fixedly connected with the support plate 44 through a fixing bolt 65, so that the outer rotor 46 drives the hob to rotate. Therefore, the external rotor motor is internally provided with a direct drive mode, the efficiency loss of a related transmission mechanism is avoided, and the working efficiency of the hob is greatly improved. Meanwhile, the noise of the whole machine is greatly reduced, and the structure is more simplified and compact.

Control module 32 is used to control the operating conditions of hob assembly 40 and travel mechanism 50. Specifically, the control module 32 includes a potentiometer 33, a travel motor controller 34, and a hob motor controller 35. The potentiometer 33 is electrically connected to the traveling motor controller 34 and the hob motor controller 35, respectively. The traveling motor controller 34 is electrically connected to the at least one single-side shaft hub motor, i.e., the traveling motor controller 34 needs to be electrically connected to each single-side shaft hub motor. The single-side shaft of the single-side shaft hub motor is fixed on the frame 30 as a part of the stator thereof. The hob motor controller 35 is electrically connected to the outer rotor motor 41.

In order to realize the correlation matching of the walking speed and the shearing speed of the hob cutter, a constant shearing frequency is ensured. In this embodiment, the hob rotation speed and the hob traveling speed are controlled by a potentiometer 33, i.e. a traveling motor controller 34 and a hob motor controller 35, which are controlled by the potentiometer 33, so as to control the traveling speed and the hob shearing speed of the lawnmower 10.

Referring to FIG. 4, FIG. 4 is a graph illustrating hob speed and walking speed control. As shown in the figure, the minimum operating speed of the external rotor motor 41 is V_aminMaximum working speed is V_amax. After the external rotor motor 41 is started, the working speed of the external rotor motor 41 is from 0 to V_aminThe time of (A) is very short and can be ignored. The minimum working speed of the single-side shaft hub motor is V_bminMaximum working speed is V_bmax. After the unilateral shaft hub motor is started, the unilateral shaft hub motor is from 0 to V_bminThe time of (A) is very short and can be ignored. Wherein, V_amin/V_bmin＝K，V_amax/K＜V_bmax. The interval range i in fig. 4 is the starting stage of the outer rotor motor 41 and the single-side shaft hub motor.

The control unit is configured to: after the lawnmower is started, the traveling speed and the rotating speed of the hob can be simultaneously increased by adjusting the potentiometer 33, that is, within the interval range II, and the working speed V of the outer rotor motor 41_aCan be composed of V_aminAdjusted to V_amax(ii) a And in the process, the speed V of the single-side shaft hub motor_bSatisfy V_a/V_b＝K，V_amax/K＝V_b2Constant value of K, V_aAnd V_bThe linear proportional relation is kept, and the interval range II is the effective working interval of the lawnmower. The operating speed of the outer rotor motor 41 reaches V_amaxThen, the potentiometer 33 is continuously adjusted, that is, in the interval iii, the working speed of the outer rotor motor 41 can be kept V_amaxAnd speed V of single-side shaft hub motor_bCan be composed of V_amaxAdjustment of/K to V_bmax。V_bmaxIs more than the maximum working walking speed, is generally suitable for lawnmowers in interval range IIIThe transition state of (1). Therefore, the shearing machine is ensured to have constant shearing frequency, the shearing effect can be ensured, and power loss can not be generated.

In this embodiment, the power module 20 is electrically connected to and provides power to the control module 32, the single-side shaft hub motor, and the outer rotor motor 41, and the power module 20 is integrated with the traveling motor controller 34 and the hob motor controller 35, and is mounted on the frame 30 and above the hob assembly 40. The rear side of the hob assembly 40 is provided with a straw bag. At the front end of the frame 30 and at the rear side of the roller assembly 40, a roller assembly 80 is provided. A switch unit 36 for controlling the shear is also provided on the frame 30, the switch unit 36 being integral with the potentiometer 33 and mounted on the frame 30. A safety handle 66 and an armrest 31 are also provided on both sides of the switch unit 36.

Referring to fig. 5, fig. 5 illustrates the main structure of a self-propelled light hob lawnmower according to another embodiment. As shown in fig. 5, the present embodiment is substantially the same as the above embodiments, and the main differences are: two road wheels 51 are located on the rear side of hob assembly 40 and are semi-enclosed by frame 30. Roller assembly 80 is located on the front side of roller assembly 40. Therefore, the grass mower is more favorable for trimming grass at the edge, and the grass collecting box can be arranged in front.

The above description is of the preferred embodiment of the present invention and the technical principles applied thereto, and it will be apparent to those skilled in the art that any changes and modifications based on the equivalent changes and simple substitutions of the technical solution of the present invention are within the protection scope of the present invention without departing from the spirit and scope of the present invention.