Walking device and wheel type electric tool

Abstract

The utility model relates to the technical field of electric tools, in particular to a walking device and a wheel type electric tool. The walking device comprises a driving unit, a transmission unit and a clutch. The clutch comprises an elastic part, a power input part and a power output part, the power input part is connected with a driving shaft of the driving unit, and the power output part is connected with the transmission unit; and the elastic piece is arranged between the power input component and the driving unit, so that the power input component overcomes the elastic force of the elastic piece under the action of the driving unit and then is jointed with the power output component. The walking device provided by the utility model can adapt to different working scenes.

Description

Technical Field

[0001] The present disclosure relates to the technical field of electric tools, and in particular to a walking device and a wheeled electric tool. Background Art

[0002] The travel device on a traditional lawn mower or snow blower can only be driven by an electric motor or can only be driven without power. The electric drive method generally includes an electric travel device, which usually includes two travel wheels connected to a transmission shaft, and the motor drives the transmission shaft to achieve synchronous rotation of the two travel wheels. The existing electric travel device cannot separate the travel wheel from the drive motor when there is no electric drive, resulting in time-consuming and labor-intensive unassisted propulsion, and cannot be well adapted to different work scenarios. Utility Model Content

[0003] The present disclosure provides a walking device and a wheeled electric tool to at least solve the above technical problems existing in the prior art.

[0004] A first aspect of the present disclosure provides a walking device, the device comprising: a driving unit, a transmission unit and a clutch;

[0005] The clutch comprises an elastic member, a power input component and a power output component, wherein the power input component is connected to the driving shaft of the driving unit, and the power output component is connected to the transmission unit;

[0006] The elastic member is disposed between the power input component and the driving unit, so that the power input component can be engaged with the power output component after overcoming the elastic force of the elastic member under the action of the driving unit.

[0007] Optionally, the driving unit includes a motor and a connecting member fixed to a driving shaft of the motor;

[0008] The power output component comprises a housing, the housing is rotatably disposed on the drive shaft, and a groove is formed at one end of the housing along the axial direction of the drive shaft;

[0009] The power input component includes a centrifugal assembly and a stopper, and the centrifugal assembly is arranged in the groove;

[0010] The limiting member and the connecting member are connected to each other, and the centrifugal assembly is arranged between the limiting member and the housing along the axial direction of the driving shaft;

[0011] The elastic member is arranged on the centrifugal assembly, or two ends of the elastic member are respectively connected to the centrifugal assembly and the connecting member.

[0012] Optionally, the centrifugal assembly includes a first centrifugal member and a second centrifugal member, and the first centrifugal member and the second centrifugal member are centrally symmetrical with respect to the drive shaft;

[0013] Two ends of the elastic member are connected to the first centrifugal member and the second centrifugal member respectively.

[0014] Optionally, the limiting member includes a first limiting block and a second limiting block located on both sides of the driving shaft, and the first limiting block and the second limiting block both extend in a direction away from the driving shaft in a direction perpendicular to the axial direction of the driving shaft;

[0015] The first centrifugal member is provided with a first slide groove, the second centrifugal member is provided with a second slide groove, the first limiting block is slidably matched with the first slide groove, and the second limiting block is slidably matched with the second slide groove.

[0016] Optionally, the housing is provided with a through hole penetrating the groove, and the drive shaft is arranged in the through hole;

[0017] The power output component also includes a driving wheel for engaging with the transmission unit, wherein the driving wheel is fixedly connected to the housing and is rotationally connected to the driving shaft.

[0018] Optionally, there are multiple first centrifugal members, and the multiple first centrifugal members are evenly spaced along the axial direction of the driving shaft;

[0019] There are multiple second centrifugal members, and the multiple second centrifugal members are evenly spaced apart along the axial direction of the driving shaft.

[0020] Optionally, a differential is further included, the differential including a housing, the housing forming a cavity, a gear ring for cooperating with the transmission unit is provided on the outside of the housing, and a gear transmission assembly is provided in the cavity.

[0021] Optionally, the gear transmission assembly includes at least one planetary gear and side gears located on both sides of the planetary gear;

[0022] The axle of the planetary gear is fixed in the radial direction of the ring gear, and the planetary gear is rotatably connected with the axle;

[0023] Both of the side gears are meshed with the planetary gears.

[0024] Optionally, the shell is provided with a first mounting hole and a second mounting hole, the half-shaft of the wheeled power tool passes through the first mounting hole and the second mounting hole, and the half-shaft gear is fixed to the half-shaft.

[0025] A second aspect of the present disclosure provides a wheeled electric tool, comprising the walking device described in the first aspect.

[0026] The walking device provided by the embodiment of the present disclosure includes a driving unit, a transmission unit and a clutch; the clutch includes an elastic member, a power input component and a power output component, the power input component is connected to the driving shaft of the driving unit, the driving unit can transmit power to the power input component, the power output component is connected to the transmission unit, and the power output component can transmit power to the transmission unit; the elastic member is arranged between the power input component and the driving unit, so that the power input component can engage with the power output component after overcoming the elastic force of the elastic member under the action of the driving unit. When the driving unit is running, the driving unit drives the power input component to run, and the centrifugal force generated by the operation of the power input component will overcome the elastic force of the elastic member. When the centrifugal force reaches a set value, the power input component engages with the power output component and drives the power output component to run. When the driving unit is not running, the power input component is separated from the power output component under the action of the elastic force of the elastic member. When the power output component rotates under the action of manpower, the power input component and the driving unit will not be driven, thereby saving manpower and facilitating the walking device to adapt to different working scenes.

[0027] It should be understood that the content described in this section is not intended to identify the key or important features of the embodiments of the present disclosure, nor is it intended to limit the scope of the present disclosure. Other features of the present disclosure will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The above and other objects, features and advantages of the exemplary embodiments of the present disclosure will become readily understood by reading the detailed description below with reference to the accompanying drawings. In the accompanying drawings, several embodiments of the present disclosure are shown in an exemplary and non-limiting manner, in which:

[0029] In the drawings, the same or corresponding reference numerals represent the same or corresponding parts.

[0030] Figure 1 A schematic diagram of the structure of a walking device provided in an embodiment of the present disclosure;

[0031] Figure 2 A schematic diagram of the main structure of a walking device provided in an embodiment of the present disclosure;

[0032] Figure 3 for Figure 2 AA section view;

[0033] Figure 4 A schematic diagram of the structure of a clutch in a walking device provided in an embodiment of the present disclosure.

[0034] Explanation of the numbers in the figure: 11. Motor; 12. Drive shaft; 13. Connecting part; 21. Housing; 211. Groove; 22. Drive wheel; 23. Bearing; 31. First centrifugal part; 311. First slide groove; 32. Second centrifugal part; 321. Second slide groove; 33. First limit block; 34. Second limit block; 41. Housing; 411. Ring gear; 42. Planetary gear; 43. Half-shaft gear; 44. Half-shaft; 5. Transmission unit; 51. Gear; 6. Elastic part. DETAILED DESCRIPTION

[0035] In order to make the purpose, features, and advantages of the present disclosure more obvious and easy to understand, the technical solutions in the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings in the embodiments of the present disclosure. Obviously, the described embodiments are only part of the embodiments of the present disclosure, not all of the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present disclosure.

[0036] Combination Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the walking device provided by the embodiment of the present disclosure includes a driving unit, a transmission unit 5 and a clutch; the clutch includes an elastic member 6, a power input component and a power output component, the power input component is connected to the driving shaft 12 of the driving unit, the driving unit can transfer power to the power input component, the power output component is connected to the transmission unit 5, and the power output component can transfer power to the transmission unit 5; the elastic member 6 is arranged between the power input component and the driving unit, so that the power input component can be engaged with the power output component after overcoming the elastic force of the elastic member 6 under the action of the driving unit. When the driving unit is running, the driving unit drives the power input component to run, and the centrifugal force generated by the operation of the power input component will overcome the elastic force of the elastic member 6. When the centrifugal force reaches a set value, the power input component is engaged with the power output component and drives the power output component to run. When the driving unit is not running, the power input component is separated from the power output component under the action of the elastic force of the elastic member 6. When the power output component rotates under the action of manpower, the power input component and the driving unit will not be driven, thereby saving manpower and facilitating the walking device to adapt to different working scenes.

[0037] In this embodiment, when the driving unit is operating, the driving unit drives the power input component to operate, and the centrifugal force generated by the operation of the power input component will overcome the elastic force of the elastic member 6. When the centrifugal force reaches the set value, the power input component and the power output component are engaged together through friction force, thereby realizing that the driving unit drives the power input component and the power output component to operate simultaneously.

[0038] Optionally, the elastic member 6 may be a spring or other elastic elements.

[0039] In some specific embodiments, the driving unit includes a motor 11 and a connecting member 13 fixed to a driving shaft 12 of the motor; the power output component includes a housing 21, and the housing 21 is rotatably arranged on the driving shaft 12. Optionally, the housing 21 is provided with a mounting hole, and the driving shaft 12 is passed through the mounting hole. A groove 211 is formed at one end of the housing 21 along the axial direction of the driving shaft 12; the power input component includes a centrifugal component and a stopper, and the centrifugal component is arranged in the groove 211; the stopper and the connecting member 13 are connected to each other, and optionally, the stopper and the connecting member 13 can be an integrated structure.

[0040] Along the axial direction of the drive shaft 12, the centrifugal assembly is arranged between the stopper and the shell 21. In other words, the stopper is used to limit the axial movement of the centrifugal assembly. The elastic member 6 is arranged on the centrifugal assembly, or the two ends of the elastic member 6 are respectively connected to the centrifugal assembly and the connector 13. When the drive shaft 12 is stationary or running at a low speed, the centrifugal assembly is separated from the shell 21 under the action of the elastic tension of the elastic member 6; when the speed of the drive shaft 12 reaches a certain value, the centrifugal force generated by the centrifugal assembly overcomes the elastic force of the elastic member 6, so that the centrifugal assembly moves outward, and the centrifugal assembly fits the inner wall of the groove 211 of the shell 21, and is combined together by friction, thereby driving the shell 21 to move the transmission torque. When the drive shaft 12 is stationary or running at a low speed, the centrifugal assembly is separated from the shell 21 under the action of the elastic tension of the elastic member 6. When the shell 21 rotates under the action of manpower, the centrifugal assembly and the drive shaft 12 will not be driven, thereby saving manpower and facilitating the walking device to adapt to different working scenes.

[0041] In some specific embodiments, the centrifugal assembly includes a first centrifugal member 31 and a second centrifugal member 32, and the first centrifugal member 31 and the second centrifugal member 32 are centrally symmetrical with respect to the drive shaft 12; the two ends of the elastic member 6 are respectively connected to the first centrifugal member 31 and the second centrifugal member 32. When the rotation speed of the drive shaft 12 reaches a certain value, the first centrifugal member 31 and the second centrifugal member 32 overcome the elastic force of the elastic member 6 and move away from each other, so that the centrifugal assembly fits the inner wall of the groove 211 of the outer shell 21, thereby driving the outer shell 21 to move and transmit torque. When the drive shaft 12 is stationary or running at a low speed, the centrifugal assembly is separated from the outer shell 21 under the elastic tension of the elastic member 6. When the outer shell 21 rotates under the action of manpower, the centrifugal assembly and the drive shaft 12 will not be driven, thereby saving manpower and facilitating the walking device to adapt to different working scenes.

[0042] Optionally, the number of springs can be two, and the two springs are centrally symmetrical with respect to the drive shaft 12, and the two ends of the spring are respectively connected to the first centrifugal component 31 and the second centrifugal component 32, thereby improving the stability of the combination of the centrifugal assembly and the outer shell 21 and making the operation of the walking device more stable.

[0043] In some specific embodiments, the limiter includes a first limit block 33 and a second limit block 34 located on both sides of the drive shaft 12, and the first limit block 33 and the second limit block 34 both extend in a direction away from the drive shaft 12 along the axial direction perpendicular to the drive shaft 12; the first centrifugal member 31 is provided with a first slide groove 311, and the first slide groove 311 extends in a axial direction perpendicular to the drive shaft 12, and the second centrifugal member 32 is provided with a second slide groove 321, and the second slide groove 321 extends in a axial direction perpendicular to the drive shaft 12. The first limit block 33 slides with the first slide groove 311, and the second limit block 34 slides with the second slide groove 321, so that the movement of the first centrifugal member 31 and the second centrifugal member 32 is smoother, the stability of the combination of the first centrifugal member 31 and the second centrifugal member 32 with the outer shell 21 is improved, and the operation of the walking device is more stable.

[0044] In some specific embodiments, the housing 21 is provided with a through hole penetrating the groove 211, and the drive shaft 12 is arranged in the through hole; the power output component further includes a drive wheel 22 for engaging with the transmission unit, the drive wheel 22 is fixedly connected to the housing 21, and the drive wheel 22 is rotatably connected to the drive shaft 12. When the drive shaft 12 is stationary or running at a low speed, the centrifugal assembly is separated from the housing 21, and when the housing 21 rotates under the action of manpower, the centrifugal assembly and the drive shaft 12 will not be driven, thereby saving manpower and facilitating the walking device to adapt to different working scenes.

[0045] A bearing 23 is disposed on the driving shaft 12 . The bearing 23 is located on a side of the driving wheel 22 away from the housing 21 .

[0046] In some specific embodiments, there are multiple first centrifugal components 31, and the multiple first centrifugal components 31 are evenly spaced along the axial direction of the drive shaft 12, which improves the stability of the combination of the centrifugal assembly and the housing 21 and makes the operation of the walking device more stable.

[0047] There are multiple second centrifugal components 32 , which are evenly spaced apart along the axial direction of the drive shaft 12 , thereby improving the stability of the combination of the centrifugal assembly and the housing 21 and making the operation of the walking device more stable.

[0048] The first centrifugal component 31 and the second centrifugal component 32 are arranged in a one-to-one correspondence, which improves the stability of the combination of the centrifugal assembly and the housing 21 and makes the operation of the walking device more stable.

[0049] In some specific embodiments, the walking device further includes a differential, which includes a housing 41, the housing 41 is formed with a cavity, the housing 41 is provided with a gear ring 411 for cooperating with the transmission unit 5, the gear ring 411 is fixedly connected to the housing 41, and a gear transmission assembly is provided in the cavity. By providing the gear ring 411 cooperating with the transmission unit 5 in the housing 41, the torque input from the transmission unit 5 can be smoothly transmitted to the differential housing 41. In this embodiment, by providing a differential, differential travel of the two walking wheels of the walking device can be achieved.

[0050] In some specific embodiments, the transmission unit 5 includes a plurality of gears 51 meshing in sequence, one gear 51 in the transmission unit 5 meshes with the driving wheel 22, and another gear 51 meshes with the ring gear 411, so that the movement of the driving unit can be transmitted to the differential.

[0051] In some specific embodiments, the gear transmission assembly includes at least one planetary gear 42 and half-axle gears 43 located on both sides of the planetary gear 42; the axle of the planetary gear is fixed in the radial direction of the ring gear 411, and the planetary gear is rotatably connected to the axle; the two half-axle gears 43 are both meshed with the planetary gears, so as to realize differential travel of the two walking wheels of the walking device.

[0052] Optionally, the gear transmission assembly includes two planetary gears 42 , and the two planetary gears 42 are both mounted on the axles of the planetary gears, so that the two planetary gears 42 can rotate around the axles of the planetary gears while rotating as a whole along with the differential housing 41 .

[0053] In some specific embodiments, the shell 41 is provided with a first mounting hole and a second mounting hole, the half-shaft 44 of the wheeled power tool passes through the first mounting hole and the second mounting hole, the half-shaft gear 43 is fixed to the half-shaft 44, and the walking wheel is installed on the half-shaft 44, so that differential driving of the two walking wheels of the walking device can be realized.

[0054] The wheeled power tool provided by the present disclosure may be a lawn mower, a snow sweeper, or other wheeled power tools. The wheeled power tool provided by the embodiment of the present disclosure includes the walking device provided by the embodiment of the present disclosure. Since the wheeled power tool provided by the embodiment of the present disclosure has the same advantages as the walking device provided by the embodiment of the present disclosure, they will not be described in detail here.

[0055] It should be understood that the various forms of processes shown above can be used to reorder, add or delete steps. For example, the steps recorded in this disclosure can be executed in parallel, sequentially or in different orders, as long as the desired results of the technical solution disclosed in this patent can be achieved, and this document is not limited here.

[0056] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present disclosure, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0057] The above are only specific embodiments of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present disclosure, which should be included in the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be based on the protection scope of the claims.

Claims

1. A walking device, characterized in that: include: A drive unit, a transmission unit (5) and a clutch; The clutch comprises an elastic member (6), a power input component and a power output component, wherein the power input component is connected to a drive shaft (12) of the drive unit, and the power output component is connected to the transmission unit (5); The elastic member (6) is arranged between the power input component and the driving unit, so that the power input component can be engaged with the power output component after overcoming the elastic force of the elastic member (6) under the action of the driving unit; It also includes a differential, the differential including a housing (41), the housing (41) forming a cavity, a gear ring (411) for cooperating with the transmission unit (5) being provided outside the housing (41), and a gear transmission assembly being provided inside the cavity.

2. The walking device according to claim 1, characterized in that: The driving unit comprises a motor (11) and a connecting member (13) fixed to a driving shaft (12) of the motor; The power output component comprises a housing (21), the housing (21) is rotatably disposed on the drive shaft (12), and a groove (211) is formed at one end of the housing (21) along the axial direction of the drive shaft (12); The power input component comprises a centrifugal assembly and a stopper, and the centrifugal assembly is arranged in the groove (211); The limiting member and the connecting member (13) are connected to each other, and along the axial direction of the driving shaft (12), the centrifugal assembly is arranged between the limiting member and the housing (21); The elastic member (6) is arranged on the centrifugal assembly, or the two ends of the elastic member (6) are respectively connected to the centrifugal assembly and the connecting member (13).

3. The walking device according to claim 2, characterized in that: The centrifugal assembly comprises a first centrifugal member (31) and a second centrifugal member (32), wherein the first centrifugal member (31) and the second centrifugal member (32) are centrally symmetrical with respect to the driving shaft (12); Two ends of the elastic member (6) are respectively connected to the first centrifugal member (31) and the second centrifugal member (32).

4. The walking device according to claim 3, characterized in that: The limiting member comprises a first limiting block (33) and a second limiting block (34) located on both sides of the driving shaft (12), wherein the first limiting block (33) and the second limiting block (34) both extend in a direction away from the driving shaft (12) along a direction perpendicular to the axial direction of the driving shaft (12); The first centrifugal member (31) is provided with a first slide groove (311), the second centrifugal member (32) is provided with a second slide groove (321), the first limiting block (33) is slidably matched with the first slide groove (311), and the second limiting block (34) is slidably matched with the second slide groove (321).

5. The walking device according to claim 2, characterized in that: The housing (21) is provided with a through hole penetrating the groove (211), and the drive shaft (12) is arranged in the through hole; The power output component also includes a driving wheel (22) for engaging with the transmission unit, wherein the driving wheel (22) is fixedly connected to the housing (21), and the driving wheel (22) is rotationally connected to the driving shaft (12).

6. The walking device according to claim 3, characterized in that: The number of the first centrifugal members (31) is plural, and the plurality of the first centrifugal members (31) are evenly spaced along the axial direction of the drive shaft (12); There are a plurality of the second centrifugal members (32), and the plurality of the second centrifugal members (32) are evenly spaced apart along the axial direction of the drive shaft (12).

7. The walking device according to claim 1, characterized in that: The gear transmission assembly comprises at least one planetary gear (42) and side gears (43) located on both sides of the planetary gear (42); The axle of the planetary gear (42) is fixed in the radial direction of the gear ring (411), and the planetary gear (42) is rotatably connected to the axle; The two side gears (43) are meshed with the planetary gears (42).

8. The walking device according to claim 7, characterized in that: The housing (41) is provided with a first mounting hole and a second mounting hole, the half shaft (44) of the wheeled electric tool passes through the first mounting hole and the second mounting hole, and the half shaft gear (43) is fixed to the half shaft (44).

9. A wheeled electric tool, characterized in that: A walking device comprising any one of claims 1 to 8.

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