Outdoor walking equipment, electric mower and power unit

Abstract

The utility model discloses outdoor walking equipment, an electric mower and a power unit, and the outdoor walking equipment comprises a vehicle body which is provided with walking wheels; the power unit comprises a motor with an output shaft and a power transmission unit for transmitting the driving force of the output shaft to the walking wheels; the power supply mechanism provides electric energy for the power unit; the power transmission unit comprises an electromagnetic braking mechanism and a speed reducing mechanism, and the electromagnetic braking mechanism generates braking force to brake rotation of the output shaft; the speed reducing mechanism converts the torque of the output shaft and transmits the torque to the walking wheels. In the extending direction of the output shaft, at least part of the electromagnetic braking mechanism is located between the motor and the speed reducing mechanism. The outdoor walking equipment is reliable in braking and good in compactness.

Description

Technical Field

[0001] The present application relates to a power tool, and more particularly to an outdoor walking device, an electric lawn mower and a power unit. Background Art

[0002] Outdoor walking devices are used for outdoor operations. For example: multi-purpose vehicles, agricultural machinery vehicles, farm buggies, ATVs, golf carts, lawn mowers, etc. Outdoor walking devices generally include an energy storage device, which supports a motive power prime mover or a motor with the energy of the energy storage device, and a load element driven by the motor. The load element generally includes walking wheels and working accessories, etc. In the related art, the parking method usually adopts a mechanical braking method, and the user operates to drive the brake to make the vehicle stop stably. On a slope, the user needs to keep driving the brake to prevent the vehicle from slipping. On the other hand, the structure of the mechanical brake needs to extend from the front of the vehicle to the rear to achieve the purpose of the user operating to drive the brake, and the mechanical brake structure basically needs to span the vehicle longitudinally.

[0003] This section provides background information related to the present application, and these background information are not necessarily prior art. Summary of the Utility Model

[0004] An object of the present application is to solve or at least mitigate part or all of the above problems. To this end, an object of the present application is to provide an outdoor walking device, an electric lawn mower and a power unit with reliable braking and good compactness.

[0005] To achieve the above object, the present application adopts the following technical solutions:

[0006] An outdoor walking device includes: a vehicle body provided with walking wheels; a power unit including a motor having an output shaft and a power transmission unit for transmitting the driving force of the output shaft to the walking wheels; a power supply mechanism for providing electric energy to the power unit; the power transmission unit includes an electromagnetic braking mechanism and a speed reduction mechanism, the electromagnetic braking mechanism generates a braking force to brake the rotation of the output shaft; the speed reduction mechanism converts the torque of the output shaft and transmits it to the walking wheels; in the extending direction of the output shaft, at least part of the electromagnetic braking mechanism is located between the motor and the speed reduction mechanism.

[0007] In some embodiments, the electromagnetic braking mechanism is disposed at one end of the output shaft close to the walking wheels.

[0008] In some embodiments, the motor includes a first end cover disposed on one side of the stator; the speed reduction mechanism and the first end cover surround and form a substantially sealed accommodation space for accommodating the electromagnetic braking mechanism.

[0009] In some embodiments, the speed reduction mechanism includes a gear and a gear box for accommodating the gear, and at least part of the electromagnetic braking mechanism is mounted on the gear box.

[0010] In some embodiments, a manual release component is further included. The manual release component is for a user to operate to release the braking of the output shaft by the electromagnetic braking mechanism or to drive the electromagnetic braking mechanism to brake the output shaft.

[0011] In some embodiments, the speed reduction mechanism includes a gear and a gear box for accommodating the gear. At least part of the manual release component is mounted on the gear box.

[0012] In some embodiments, the manual release component includes a handle for a user to operate. At least part of the handle extends out of the gear box and is exposed outside the vehicle body.

[0013] In some embodiments, the electromagnetic braking mechanism: an electromagnet that generates an electromagnetic force after being powered on; a pressure plate configured with a first position driven away from the electromagnet and a second position close to the electromagnet; a brake pad that brakes the output shaft when the pressure plate is in the first position; the manual release component is connected to the pressure plate and drives the pressure plate to move between the first position and the second position.

[0014] In some embodiments, a controller is further included to control the electromagnetic braking mechanism to switch between a first state of braking the output shaft and a second state of releasing the output shaft; wherein, the electromagnetic braking mechanism is in the first state in a power-off state.

[0015] In some embodiments, a detection component is further included. The detection component detects the position state of a handle for a user to operate to switch whether to brake the output shaft. The detection component is connected to the controller.

[0016] An electric lawn mower includes: a vehicle body provided with traveling wheels; a power unit including a motor having an output shaft and a power transmission unit for transmitting the driving force of the motor to the traveling wheels; a mowing component including a mowing blade; a power supply mechanism for supplying electric energy to the power unit; the power transmission unit includes an electromagnetic braking mechanism and a transmission mechanism. The electromagnetic braking mechanism generates a braking force to brake the rotation of the output shaft; the transmission mechanism is for transmitting the torque output by the motor to the traveling wheels; wherein, the electromagnetic braking mechanism is provided on one side of the motor close to the transmission mechanism.

[0017] A power unit applicable to an outdoor walking device includes: a stator having a stator core, a plurality of stator teeth radially extending from the stator core, and a plurality of windings wound around the plurality of stator teeth; a rotor rotatable relative to the stator and having a rotor core and a plurality of permanent magnets fixed to the rotor core; a first end cover provided on a first side of the stator; a second end cover provided on a second side of the stator; a transmission mechanism for converting or transmitting the torque output by the rotor to the outdoor walking device; further including: a parking braking mechanism that generates a braking force to brake the rotation of the rotor; the transmission mechanism includes a gear box body, and the gear box body and the first end cover surround to form a substantially sealed space to accommodate the parking braking mechanism.

[0018] In some embodiments, the parking brake mechanism includes an electromagnetic brake.

[0019] In some embodiments, the outdoor walking device includes an electric lawn mower and an all-terrain vehicle.

[0020] The advantages of the present application are as follows: An electromagnetic braking mechanism is provided to achieve a more timely and safer parking braking solution in case of emergency. The electromagnetic braking mechanism does not rely on manual operation and actively brakes the output shaft of the motor when power is lost, making the braking more timely and reliable. The electromagnetic braking mechanism is arranged at least partially between the motor and the reduction mechanism and on the side of the motor close to the transmission mechanism, making the overall mechanism of the power unit more compact. The braking force of the electromagnetic braking mechanism is directly applied to the output shaft, and the gear box body and the first end cover surround to form a substantially sealed space to accommodate the parking brake mechanism. Using the gear box body and the first end cover to seal the parking brake mechanism eliminates the need for additional sealing, better ensuring the sealing performance of the power unit and extending its service life. Brief Description of the Drawings

[0021] Figure 1 is a schematic diagram of the structure diagram of the outdoor walking device as an embodiment of the present application;

[0022] Figure 2 is a schematic diagram of the structure diagram of the outdoor walking device as an embodiment of the present application from another perspective;

[0023] Figure 3 is a schematic diagram of the power supply mechanism adapting to different vehicles as an embodiment of the present application;

[0024] Figure 4 is a schematic diagram of the structure of the walking mechanism and the control mechanism as an embodiment of the present application;

[0025] Figure 5 is a schematic diagram of the power unit as an embodiment of the present application;

[0026] Figure 6 is a schematic diagram of the walking mechanism from another perspective as an embodiment of the present application;

[0027] Figure 7 is a schematic diagram of the walking motor from another perspective as an embodiment of the present application;

[0028] Figure 8 is Figure 7 the schematic diagram of A-A in

[0029] Figure 9 is Figure 7 the schematic diagram of B-B in, where the pressing plate is in the first position and the electromagnetic brake is in the first state;

[0030] Figure 10 It is a schematic diagram of a partial cross-sectional view of a walking motor as an embodiment of the present application. Among them, the pressure plate is in the second position, the electromagnetic brake is in the second state, and the handle is in the unlocked position;

[0031] Figure 11 It is a partial view of a walking motor as an embodiment of the present application, mainly showing the manual release assembly, and the handle is in the braking position;

[0032] Figure 12 It is a partial schematic diagram of a half-sectional view of a walking motor and a transmission mechanism as an embodiment of the present application;

[0033] Figure 13 It is a partial cross-sectional view of a transmission mechanism as an embodiment of the present application;

[0034] Figure 14 It is a cross-sectional view of a partial structure of a transmission mechanism and a walking wheel as an embodiment of the present application;

[0035] Figure 15 It is a schematic diagram of a reduction gear assembly as an embodiment of the present application;

[0036] Figure 16 It is a schematic diagram of another reduction gear assembly as an embodiment of the present application;

[0037] Figure 17 It is a schematic diagram of a partial structure of a walking mechanism and a vehicle frame as an embodiment of the present application;

[0038] Figure 18 It is a schematic diagram of the structure of a human-computer interaction mechanism as an embodiment of the present application;

[0039] Figure 19 It is a system block diagram of a human-computer interaction mechanism as an embodiment of the present application;

[0040] Figure 20 It is a cross-sectional view of a walking motor as an embodiment of the present application;

[0041] Figure 21 It is a cross-sectional view of another perspective of a walking motor as an embodiment of the present application;

[0042] Figure 22 is Figure 21 the C-C view in;

[0043] Figure 23 It is a cross-sectional view of another perspective of a walking motor as an embodiment of the present application;

[0044] Figure 24It is an internal view of the walking motor as an embodiment of the present application, with the cover plate of the second end cover removed;

[0045] Figure 25 It is a schematic diagram of a half-sectional view of the waterproof breathable valve;

[0046] Figure 26a It is Figure 3 a three-dimensional view of the first connecting member of the power supply mechanism and the battery pack in

[0047] Figure 26b It is Figure 3 a three-dimensional view of the second connecting member of the power supply mechanism and the battery pack in

[0048] Figure 27 It is a schematic diagram of the second connecting member and the third battery pack as an embodiment of the present application;

[0049] Figure 28 It is Figure 1 a three-dimensional view of the power supply mechanism of the outdoor walking device in Detailed implementation manners

[0050] Before explaining any embodiment of the present application in detail, it should be understood that the present application is not limited to the structural details and component arrangements described in the following description or shown in the above drawings.

[0051] In the present application, the terms "include", "comprise", "have" or any other variant thereof are intended to cover non-exclusive inclusion, such that a process, method, article or device including a series of elements not only includes those elements but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the phrase "including a..." does not exclude the presence of additional identical elements in the process, method, article or device including the element.

[0052] In the present application, the term "and / or" is a relationship description of associated objects, indicating that three relationships can exist. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, in the present application, the character " / " generally represents an "and / or" relationship between the associated objects before and after.

[0053] In this application, the terms "connected", "combined", "coupled", and "mounted" can be direct connections, combinations, couplings, or mountings, or can be indirect connections, combinations, couplings, or mountings. Among them, for example, a direct connection means that two parts or components are connected together without an intermediate member being provided, and an indirect connection means that two parts or components are respectively connected to at least one intermediate member, and these two parts or components are connected through the intermediate member. In addition, "connected" and "coupled" are not limited to physical or mechanical connections or couplings, and can include electrical connections or couplings.

[0054] In this application, those of ordinary skill in the art will understand that relative terms used in connection with a quantity or condition (such as "about", "approximately", "substantially", etc.) are intended to include the recited value and have the meaning indicated by the context. For example, such relative terms include at least the degree of error associated with the measurement of a particular value, tolerances resulting from manufacturing, assembly, use, etc. associated with a particular value. Such terms should also be considered to disclose a range defined by the absolute values of two endpoints. The relative term may refer to a plus or minus of a certain percentage (such as 1%, %, 1% or more) of the indicated value. Numerical values without the use of relative terms should also be disclosed as specific values having tolerances. In addition, when expressing a relative angular positional relationship (such as substantially parallel, substantially perpendicular), "substantially" may refer to a plus or minus of a certain number of degrees (such as 1 degree, degrees, 1 degree or more) based on the indicated angle.

[0055] In this application, those of ordinary skill in the art will understand that the functions performed by a component can be performed by one component, multiple components, one part, or multiple parts. Similarly, the functions performed by a part can also be performed by one part, one component, or a combination of multiple parts.

[0056] In this application, the orientation terms such as "upper", "lower", "left", "right", "front", "rear", etc. are described based on the orientation and positional relationship shown in the drawings, and should not be construed as a limitation on the embodiments of this application. In addition, in the context, it should also be understood that when it is mentioned that one element is connected "above" or "below" another element, it can not only be directly connected "above" or "below" another element, but also be indirectly connected "above" or "below" another element through an intermediate element. It should also be understood that orientation terms such as upper side, lower side, left side, right side, front side, rear side, etc. not only represent the positive orientation, but can also be understood as the side orientation. For example, below can include directly below, lower left, lower right, front lower, and rear lower, etc.

[0057] In this application, the terms "controller", "processor", "central processing unit", "CPU", and "MCU" are interchangeable. When using the units "controller", "processor", "central processing unit", "CPU", or "MCU" to perform specific functions, unless otherwise specified, these functions can be performed by a single one of the above units or multiple of the above units.

[0058] In this application, for the purpose of implementing specific functions, the terms "device", "module", or "unit" can be implemented in the form of hardware or software.

[0059] In this application, the terms "calculate", "judge", "control", "determine", "identify", etc. refer to the operations and processes of a computer system or a similar electronic computing device (such as a controller, a processor, etc.).

[0060] As Figure 1 , Figure 2 and Figure 3 shown, the outdoor walking device 100 disclosed in this application is specifically a wheeled work vehicle or an outdoor work vehicle. For example, an electric lawn mower 200 or an electric lawn trimmer can be controlled by a user to trim lawns or other vegetation, etc. Optionally, a ride-on lawn mower 200a can be ridden or stood on by a user to control for trimming lawns and other vegetation, etc. In this specification, the directions of front, rear, left, right, up, and down are described as the directions shown in Figure 1 . When a user is sitting on the outdoor walking device 100 located on the ground, the direction the user is facing is defined as the front, the direction the user is facing away from is defined as the rear, the direction on the user's left hand side is defined as the left, the direction on the user's right hand side is defined as the right, the direction close to the ground is defined as the down, and the direction away from the ground is defined as the up. Of course, the outdoor walking device 100 disclosed in this application also includes an all-terrain vehicle 100c (UTV, Utility Vehicle). In the related art, the all-terrain vehicle 100c includes a four-wheel all-terrain vehicle (ATV, All Terrain Vehicle), a multi-functional all-terrain vehicle, and a recreational off-road vehicle. In addition, the outdoor walking device 100 disclosed in this application also includes a ride-on snow blower, a push mower, a push snow blower 100d, and an electric motorcycle, etc.

[0061] As Figures 1 to 5As shown, the outdoor walking device 100 includes: a vehicle body 10, a power supply mechanism 20, a power unit 30, and a walking mechanism 40. The vehicle body 10 includes a vehicle frame 11 that extends substantially in the front-rear direction and is used to mount the power supply mechanism 20, the power unit 30, and the walking mechanism 40. The power supply mechanism 20 is used to supply electrical energy to the power unit 30. The power unit 30 is a set of components that provide driving force in the outdoor walking device 100. In some embodiments, the power unit 30 includes a walking motor 42 that drives the outdoor walking device 100 to move. In some embodiments, it includes a second motor for driving a functional accessory that enables the outdoor walking device 100 to perform an operation function. Taking the electric lawn mower 200 as an example, the functional accessory is a mowing element 81, and the second power motor is a mowing motor 82. It can be understood that in some embodiments, the walking motor 42 belongs to the walking mechanism 40. In some embodiments, the mowing motor 82 belongs to the mowing assembly 80. In some embodiments, the outdoor walking device 100 is a snow sweeper 100d, and the second motor includes the motor of the snow shoveling mechanism 80d. In some embodiments, the outdoor walking device 100 further includes other motors or prime movers that output driving force. On the one hand, these motors or prime movers belong to the set of the power unit 30, but at the same time, they also belong to the assemblies of the components driven by the driving force of these motors or prime movers, such as a seat assembly including electric seat adjustment. In some embodiments of the present disclosure, the power unit 30 shares a motor or prime mover structure with some functional components. Therefore, the present disclosure does not intend to set the power unit 30 completely independently.

[0062] The walking mechanism 40 includes at least a walking wheel set 41. The walking wheel set 41 includes walking wheels 411 and 412 that are connected to the vehicle body 10 to support the vehicle body 10 and drive the vehicle body 10 to move.

[0063] In this embodiment, the power supply mechanism 20 includes a battery pack 21 and a connector 22 for mounting the battery pack 21 to connect the battery pack 21 to the outdoor walking device 100. The battery pack 21 cooperates with a corresponding power circuit to supply power to at least the power unit 30. The power unit 30 outputs power to drive the walking mechanism 40 so that the outdoor walking device 100 moves according to the operation.

[0064] The battery pack 21 is detachably connected to the connector 22, and the connector 22 is detachably mounted to the outdoor walking device 100 so that it can be taken out to adapt to other electrical devices. Among them, the other electrical devices include but are not limited to an all-terrain vehicle 100c, a push-type lawn mower, a push-type snow sweeper 100d, and a ride-on lawn mower 200a. Specifically, refer to Figure 3As shown, the power supply mechanism 20 of the outdoor walking device 100 can be removably taken out from the outdoor walking device 100, and then installed on the all-terrain vehicle 100c, push mower, push snow blower 100d, riding mower 100a, and stand-on mower 100b to supply power to these electrical devices above to realize the functions of the above power supply devices.

[0065] In this embodiment, the power unit 30 further includes a power transmission unit 31 that transmits the driving force of the walking motor 42 to the walking wheels. The power transmission unit 31 is connected to the output shaft 423 of the walking motor 42 and the walking wheels 411, 412. The power transmission unit 31 includes a parking brake mechanism 44 and a transmission mechanism 45. The parking brake mechanism 44 can brake the rotation of the output shaft 423, and the transmission mechanism 45 is used to convert or transmit the torque output by the motor and transmit the torque to the walking wheels 411, 412. As Figure 6 、 Figure 8 and Figure 9 shown, in this embodiment, the walking motor 42 includes an output shaft 423 extending along the first axis 401. In the extending direction of the output shaft 423, that is, in the direction of the first axis 401, the parking brake mechanism 44 is at least partially located between the walking motor 42 and the transmission mechanism 45. Exemplarily, the parking brake mechanism 44 is disposed on the side of the walking motor 42 close to the transmission mechanism 45.

[0066] In this embodiment, the walking motor 42 is set as an electric motor, such as a brushless motor. Exemplarily, the electric motor can be any one of an in-rotor motor, an out-rotor motor, a hub motor, and a wheel-side motor. In this embodiment, taking the in-rotor brushless motor as an example, the electric motor will be used instead of the motor hereinafter, but it cannot be used as a limitation to this application.

[0067] As Figure 9 shown, the walking motor 42 includes a stator 421 and a rotor 422. The rotor 422 is rotatable relative to the stator 421, and the output shaft 423 is formed or connected to the rotor 422.

[0068] As Figure 8 and Figure 9 shown for the walking motor 42, to protect the walking motor 42 and stably install the walking motor 42, the walking motor 42 further includes a first end cover 432 formed on the first side of the stator 421 and a second end cover 433 formed on the second side of the stator 421. In this embodiment, the parking brake mechanism 44 brakes the rotation of the output shaft 423, that is, the parking brake mechanism 44 brakes the rotation of the rotor 422.

[0069] The transmission mechanism 45 is configured as a speed reduction mechanism. For example, it is a gear transmission assembly for reducing speed and increasing torque. The transmission mechanism 45 further includes a gearbox 451 for at least partially accommodating the gear transmission assembly to prevent dust, etc. from entering between the gears and affecting the transmission life. The gearbox 451 and the first end cover 432 enclose a substantially sealed space, such as the first accommodation space 451a, which is used to accommodate the parking brake mechanism 44. By utilizing the sealed accommodation space formed between the transmission mechanism 45 and the motor, there is no need to additionally provide a sealing and dust-proof structure, which is safer and more reliable.

[0070] Exemplarily, the parking brake mechanism 44 is configured as an electromagnetic brake mechanism. Optionally, the electromagnetic brake mechanism is an electromagnetic brake 441. Hereinafter, the electromagnetic brake 441 will be used to replace the electromagnetic brake mechanism, but it should not be construed as a limitation to the present application. The electromagnetic brake 441 is configured to brake the rotation of the output shaft 423. Exemplarily, when the electromagnetic brake 441 is de-energized, it automatically brakes the rotation of the output shaft 423. Exemplarily, when the outdoor walking device 100 is powered off, the electromagnetic brake 441 will automatically brake the rotation of the output shaft 423, thereby preventing the motor-driven walking wheels 411, 412 from rotating. The electromagnetic brake 441 is provided to achieve a more timely and safer parking brake solution in case of emergency. The electromagnetic brake 441 does not rely on manual operation and actively brakes the output shaft 423 of the motor when de-energized, and the braking is more timely and reliable.

[0071] At least a part of the electromagnetic brake 441 is located between the motor and the transmission mechanism 45, making the overall structure of the power unit more compact, and the braking force of the electromagnetic brake mechanism is more directly applied to the output shaft. Exemplarily, the electromagnetic brake 441 is provided on the side of the motor close to the transmission mechanism 45. As Figure 8As shown, the output shaft 423 passes through the stator 421 of the motor. The output shaft 423 extends out of both ends of the stator 421. One end is close to the traveling wheels 411 and 412, that is, one end is connected to the transmission mechanism 45 and the traveling wheels 411 and 412, while the other end is far from the traveling wheels 411 and 412. The electromagnetic brake 441 is arranged on the side of the motor close to the transmission mechanism 45, that is, the electromagnetic brake 441 is arranged on one end of the output shaft 423 close to the traveling wheels 411 and 412. In some embodiments, the braking force application point 441m of the electromagnetic brake 441 is located at a position on the output shaft 423 closer to the stator 421. In some embodiments, the braking force application point 441m of the electromagnetic brake 441 is located at a position on the output shaft 423 closer to the traveling wheels 411 and 412. In some embodiments, the braking force application point 441m of the electromagnetic brake 441 is located between the gearbox 451 and the traveling wheels 411 and 412. It can be understood that the braking force application point 441m of the electromagnetic brake 441 located on the side of the output shaft 423 connected to the traveling wheels 411 and 412 can all fall within the disclosure scope of this application. Through the setting of the installation position of the above electromagnetic brake 441, the space between the motor and the transmission mechanism 45 is fully utilized. At the same time, the electromagnetic brake 441 is located in the transmission path of the output shaft 423 and close to the output shaft 423, and the braking force of the electromagnetic brake 441 can be applied to the output shaft 423 more directly. Meanwhile, the electromagnetic brake 441 is arranged in a substantially sealed space formed by the gearbox 451 and the first end cover 432, making full use of the sealed accommodation space formed between the transmission mechanism 45 and the motor, without the need to additionally set a sealing and dust-proof structure, which is safer and more reliable and prolongs the service life. In some embodiments, the electromagnetic brake 441 is at least partially mounted on the gearbox 451.

[0072] As Figure 6 , Figure 10 and Figure 11As shown, the parking brake mechanism 44 includes a manual release assembly 442. The manual release assembly 442 is used for the user to operate to manually release the brake of the electromagnetic brake 441 or drive the electromagnetic brake 441 to brake the output shaft 423. So that when the electromagnetic brake 441 fails to start or close due to some reasons, the user can manually perform the brake setting and release the brake. Exemplarily, when the outdoor walking device 100 is powered off, the electromagnetic brake 441 brakes the output shaft 423 due to power loss. When the outdoor walking device 100 is powered on and started, the electromagnetic brake 441 is also powered on and started to cancel the brake on the output shaft 423. After the walking motor 42 receives the drive signal of the operation instruction, the output shaft 423 rotates, and the outdoor walking device 100 walks normally. However, if the electromagnetic brake 441 fails to be powered on and started after the outdoor walking device 100 is powered on due to some reasons, at this time, the user can manually start the electromagnetic brake 441 through the manual release assembly 442, so that the brake of the electromagnetic brake 441 on the output shaft 423 is released, and the outdoor walking device 100 can walk normally.

[0073] As Figure 9 and Figure 10 shown, the electromagnetic brake 441 includes: an electromagnet 441a, a pressure plate 441f, a brake pad 441e, and a fixing plate 441g. The electromagnet 441a includes a housing 441b, a coil 441c, and at least one spring 441d. The fixing plate 441g is connected to the housing 441b. Optionally, a fixed connection with a certain distance is formed between the fixing plate 441g and the housing 441b. The fixing plate 441g is fixedly connected to the gearbox 451. A receiving cavity is provided in the housing 441b for receiving the coil 441c and the spring 441d. The pressure plate 441f and the brake pad 441e are arranged in the area between the fixing plate 441g and the housing 441b. The brake pad 441e is connected to the output shaft 423 of the walking motor 42. Optionally, the brake pad 441e is slidably connected to the output shaft 423, and the brake pad 441e applies a frictional force to the output shaft 423 in the circumferential direction to brake the output shaft 423. The pressure plate 441f has magnetic attraction. When the coil 441c in the electromagnet 441a is energized to generate an electromagnetic field, the pressure plate 441f is attracted by the electromagnet 441a. The electromagnet 441a and the brake pad 441e are respectively located on both sides of the pressure plate 441f. When the pressure plate 441f is attracted by the electromagnet 441a, the pressure plate 441f approaches the electromagnet 441a and moves away from the brake pad 441e. As Figure 10As shown, the pressure plate 441f is in the second position. As a result, the brake pad 441e basically no longer applies frictional force to the output shaft 423 or the applied frictional force does not brake the output shaft 423. It is defined that the electromagnetic brake 441 is in the second state at this time. When the electromagnetic brake 441 is in the second state, the output shaft 423 rotates according to the operation instruction signal received by the motor. When the pressure plate 441f is adsorbed to contact the electromagnet 441a, the pressure plate 441f compresses the spring 441d in the electromagnet 441a, and the spring 441d stores energy under pressure. When the electromagnetic brake 441 loses power, the coil 441c loses power and loses magnetism, and the pressure plate 441f loses the magnetic attraction of the electromagnet 441a and is pushed by the released energy of the spring 441d towards the brake pad 441e. Since the thrust of the spring 441d is large enough, the pressure plate 441f moves away from the electromagnet 441a and squeezes the brake pad 441e. As Figure 9 As shown, the pressure plate 441f is in the first position. When the pressure plate 441f is in the first position, the frictional force applied by the brake pad 441e to the output shaft 423 is increased to brake the output shaft 423. It is defined that the electromagnetic brake 441 is in the first state at this time.

[0074] The manual release assembly 442 is operated to control the distance between the pressure plate 441f and the brake pad 441e. The manual release assembly 442 includes a handle 442a and a connecting rod 442c. The handle 442a is for the user to operate. The user rotates, pushes, pulls or toggles the handle 442a to move the pressure plate 441f from the first position to the second position, as Figure 11 As shown, the handle is in the braking position and the pressure plate 441f is in the first position. As Figure 10 As shown, the handle is in the unlocking position and the pressure plate 441f is in the second position. The handle 442a is fixedly connected to the pressure plate 441f through the connecting rod 442c. A linkage rod 442d is arranged between the handle 442a and the connecting rod 442c. Using the lever principle, the handle 442a drives the connecting rod 442c to move up and down. To enable user operation, the handle 442a at least partially extends out of the gearbox 451 and is exposed outside the vehicle body 10. In some embodiments, it is arranged near the traveling wheels 411, 412. In this embodiment, when the electromagnetic brake 441 loses power, when the pressure plate 441f is in the first position, the frictional force applied by the brake pad 441e to the output shaft 423 is increased to brake the output shaft 423. After the outdoor walking device 100 is powered on, the electromagnet 441a does not generate electromagnetic force to adsorb the pressure plate 441f to the second position. At this time, the user operates the handle 442a to the unlocking position (as Figure 10The pressing plate 441f is moved by the moving pressing plate 441f (as shown), so that the pressing plate 441f moves from the first position to the second position. A stopping portion 442b is provided on the handle 442a, so that when the operating force of the user is released, the handle 442a can still be kept in the unlocking position and the pressing plate 441f is kept in the second position. The pressing plate 441f is manually moved away from the brake pad 441e to release the braking of the brake pad 441e on the output shaft 423.

[0075] As Figure 4 shown, the outdoor walking device 100 further includes a control mechanism 70, and the control mechanism 70 is used to control the operation of the outdoor walking device 100. The control mechanism 70 includes a controller 72 and a detection component 74.

[0076] Exemplarily, the control mechanism 70 is used to control the state switching of the electromagnetic brake 441. The controller 72 is configured to control the electromagnetic brake 441 to switch between the first state and the second state according to the output signal of the detection component 74. In this embodiment, the detection component 74 is used to detect the state of the handle 442a. Optionally, the detection component 74 detects the position state of the handle 442a. In this embodiment, when it is detected that the handle 442a is in the unlocking position, the controller 72 reminds the user through the human-machine interaction mechanism 60 to prompt the user to reset the handle 442a to the braking position (as Figure 11 shown). In some embodiments, when it is detected that the handle 442a is reset to the braking position, the controller 72 controls the electromagnetic brake 441 to switch between the first state and the second state according to a preset operation algorithm, so as to make the control of the electromagnetic brake 441 more automated and increase the usage conditions of the automatic parking of the electromagnetic brake 441.

[0077] Continue to refer to Figures 1 to 5 shown, when the outdoor walking device 100 is specifically an electric lawn mower 200, the electric lawn mower 200 includes a vehicle body 10, a power supply mechanism 20, a power unit 30, a walking mechanism 40, and a mowing assembly 80. The mowing assembly 80 includes a mowing blade 81. The power unit 30 further includes a power transmission unit 31 that transmits the driving force of the walking motor 42 to the walking wheels 411 and 412. The power transmission unit 31 is connected to the output shaft 423 of the walking motor and the walking wheels. The power transmission unit 31 includes a parking brake mechanism 44 and a transmission mechanism 45. The parking brake mechanism 44 can brake the rotation of the output shaft 423, and the transmission mechanism 45 is used to convert or transmit the torque output by the walking motor 42 and transmit the torque to the walking wheels. As Figure 6 and Figure 8As shown, in this embodiment, the traveling motor 42 includes an output shaft 423 extending along the first axis 401. In the extending direction of the output shaft 423, i.e., in the direction of the first axis 401, the parking brake mechanism 44 is at least partially located between the motor and the transmission mechanism 45. Exemplarily, the parking brake mechanism 44 is disposed on the side of the motor close to the transmission mechanism 45.

[0078] In this embodiment, the traveling motor 42 is set as an electric motor, such as a brushless motor. Exemplarily, the electric motor can be any one of an inner rotor motor, an outer rotor motor, a hub motor, and a wheel side motor. In this embodiment, taking the inner rotor brushless motor as an example, the electric motor will be used to replace the motor hereinafter, but it should not be regarded as a limitation to this application.

[0079] The transmission mechanism 45 is set as a speed reduction mechanism, for example, a gear transmission assembly for reducing speed and increasing torque. The transmission mechanism 45 further includes a gear box 451 for at least partially accommodating the gear transmission assembly to prevent dust, etc. from entering between the gears and affecting the transmission life.

[0080] The parking brake mechanism 44 is set as an electromagnetic brake 441, and the electromagnetic brake 441 is configured to brake the rotation of the output shaft 423. Exemplarily, when the electromagnetic brake 441 loses power, it automatically brakes the rotation of the output shaft 423. Exemplarily, when the electric lawn mower 200 loses power, the electromagnetic brake 441 will automatically brake the rotation of the output shaft 423, thereby making the traveling wheels driven by the electric motor unable to rotate. The electromagnetic brake 441 is provided to achieve a more timely and safer parking brake solution in case of emergency. The electromagnetic brake 441 does not rely on manual operation and actively brakes the output shaft 423 of the motor when losing power, and the braking is more timely and reliable.

[0081] As Figure 4 and Figure 6 As shown, the traveling mechanism 40 of the electric lawn mower 200 includes a rear traveling wheel 411 and a front traveling wheel 412. Among them, the rear traveling wheel 411 includes a left rear traveling wheel 411L and a right rear traveling wheel 411R. The front traveling wheel 412 includes a left front traveling wheel 412L and a right front traveling wheel 412R. The traveling motor 42 drives the rear traveling wheel 411 or the front traveling wheel 412 to rotate to realize the traveling function of the electric lawn mower 200. Optionally, the number of the traveling motors 42 can be one, two, three, or four. In this embodiment, the number of the traveling motors 42 is two, and the two traveling motors 42 respectively drive the left rear traveling wheel 411L and the right rear traveling wheel 411R, so that the electric lawn mower 200 can turn in other directions deviating from the front-rear direction. For convenience of reference, the traveling motor 42 driving the left rear traveling wheel 411L is set as the first traveling motor 42L, and the traveling motor 42 driving the right rear traveling wheel 411R is set as the second traveling motor 42R.

[0082] The traveling mechanism 40 further includes a power transmission unit 31 that connects the traveling motor 42 and the traveling wheels. Exemplarily, the power transmission unit 31 further includes a transmission mechanism 45. In the present embodiment, the power unit 30 is a set of components that provide driving force in the electric lawn mower 200. In some embodiments, the power unit 30 and the traveling mechanism 40 share the structure of the motor or prime mover and the power transmission unit 31. Therefore, the present disclosure does not intend to completely independently arrange the power unit 30 and the traveling mechanism 40.

[0083] As Figures 12 to 14 shown, in the present embodiment, taking the left rear traveling wheel 411L as an example, the transmission mechanism 45 includes a gearbox 451, a reduction gear assembly 455, and an intermediate shaft 455a. The first traveling motor 42L takes an in - rotor brushless motor as an example. The first traveling motor 42L includes a motor housing 43, a stator 421, and a rotor 422. The motor housing 43 includes a motor housing body 431 having an opening at one end and a motor housing cover for sealing the motor housing body 431. The motor housing body 431 and the motor housing cover are sealingly connected. In the present embodiment, the motor housing cover is the first end cover 432. The output shaft 423 extends out of the motor housing 43 through the first end cover 432 and then enters the gearbox 451 to drivingly connect the reduction gear assembly 455. The gearbox 451 forms a substantially sealed accommodation cavity to dust - proof and waterproof the components inside the gearbox 451. The intermediate shaft 455a is configured as the power output end of the reduction gear assembly 455. One end of the intermediate shaft 455a is disposed inside the gearbox 451 to connect the last - stage gear of the reduction gear assembly 455, and the other end extends out of the gearbox 451 to connect the hub 413 of the traveling wheel. Of course, it can be understood that the motor housing 43 and the gearbox 451 can be connected and composed of two or more independent components, or can be an integral component. In some embodiments, the motor housing body 431 of the motor housing 43, the first end cover 432, and the gearbox 451 can share some structures. For example, the first end cover 432 of the motor housing 43 is a part of the structure of the gearbox 451.

[0084] In the present embodiment, for the convenience of mold manufacturing and to ensure the strength of the structure, the gearbox 451 includes a first box body 451b and a second box body 451e. After the first box body 451b and the second box body 451e are sealingly connected, an accommodation cavity is formed inside. In the present embodiment, the first box body 451b and the second box body 451e are sealed with a sealant. The relative contact surfaces of the first box body 451b and the second box body 451e are sealed by applying glue. The glue - based sealing takes advantage of the strong fluidity, ductility, and deformation ability of the colloid, which can better fill the uneven places and small gaps on the relative contact surfaces of the first box body 451b and the second box body 451e, and thus obtain a better sealing effect.

[0085] The first end cover 432 is connected to the first box body 451b. After the rotor shaft, i.e., the output shaft 423, passes through the first end cover 432 and the first box body 451b respectively, it is in transmission connection with the first-stage gear of the reduction gear assembly 455. A first bearing seat 4321 is provided on the first end cover 432, and the first bearing seat 4321 fixedly supports the first bearing 434a for the rotation of the output shaft 423. A through hole 451c is provided at the corresponding position of the output shaft 423 on the first box body 451b, and a first accommodating space 451a is also formed between the first end cover 432 and the first box body 451b. To prevent the lubricating oil in the reduction gear assembly 455 from flowing into the motor box 43, a sealing structure is provided between the first bearing seat 431 and the first box body 451b to ensure the sealing effect. A first flange 4322 extending circumferentially is provided on the first end cover 432, and the first flange 4322 extends into the first accommodating space 451a formed in the first box body 451b. A first sealing ring 4323 is provided between the first flange 4322 and the outer wall of the first box body 451b for sealing. In this embodiment, the first sealing ring 4323 is an O-ring. In other embodiments, the first sealing ring 4323 can also be, for example, other sealing ring structures such as V-rings and U-rings. In this embodiment, the O-ring is provided between the surface of the first end cover 432 extending perpendicular to the first axis 401 and the surface of the first box body 451b extending perpendicular to the first axis 401. In some embodiments, the O-ring is provided between the side surface of the first end cover 432 extending parallel to the first axis 401 and the side surface of the first box body 451b extending parallel to the first axis 401. A first skeleton oil seal 435a is also sleeved on the output shaft 423, and the outer periphery of the first skeleton oil seal 435a is arranged in the through hole 451c. A stop wall 451d extends radially from the through hole 451c, and the stop wall 451d restricts the movement of the first skeleton oil seal 435a in the direction of the first axis 401. In this embodiment, the O-ring and the first skeleton oil seal 435a are similar to the structures disclosed in the related art and will not be elaborated here.

[0086] In this embodiment, the reduction gear assembly 455 is an external meshing gear reduction mechanism. The reduction gear assembly 455 includes a transmission shaft 455c that supports the rotation of the gears. The transmission shaft 455c takes the second axis 402 as the central axis and extends along the direction of the second axis 402. In this embodiment, the second axis 402 is arranged parallel to the first axis 401. In some embodiments, the second axis 402 intersects the first axis 401. The first housing 451b and the second housing 451e respectively support both ends of the transmission shaft 455c. Among them, a second bearing seat 453 is arranged in the second housing 451e. The second bearing seat 453 is fixedly used to support the second bearing 434b for the rotation of the transmission shaft 455c. A second flange 454 for restricting the axial movement of the second bearing 434b is arranged in the second bearing seat 453. The transmission shaft 455c extends out of the second flange 454 and extends outside the second housing 451e. A second skeleton oil seal 435b is sleeved on the transmission shaft 455c that extends out of the second flange 454. A circlip structure 435c is sleeved on the transmission shaft 455c on the side of the second skeleton oil seal 435b away from the second flange 454 to prevent the second skeleton oil seal 435b from falling off the transmission shaft 455c, affecting the sealing effect, and preventing the lubricating oil in the gearbox 451 from flowing out from the second bearing seat 453.

[0087] As Figure 13As shown, the second housing 451e supports the intermediate shaft 455a. The intermediate shaft 455a extends out of the second housing 451e and is connected to the hub 413 of the left rear traveling wheel 411L. The intermediate shaft 455a takes the third axis 403 as the central axis and extends along the direction of the third axis 403. The second housing 451e forms a second accommodation space 452 for storing lubricating oil. A first hole 451f is provided on the outer wall forming the second accommodation space 452. The first hole 451f communicates the second accommodation space 452 with the external environment. To ensure the sealing of the second accommodation space 452, a detachable plugging portion 451g is provided on the first hole 451f. The opening direction of the first hole 451f is arranged parallel to the third axis 403. In some embodiments, the opening direction of the first hole 451f intersects the third axis 403. In the present embodiment, the first hole 451f is provided as a stepped hole, wherein the diameter of the first part 4511 of the first hole 451f connected to the external environment is smaller than the diameter of the second part 4512 provided on the inner side. Exemplarily, the first part 4511 is the part for accommodating the plugging portion 451g, and the second part 4512 is the part close to the reduction gear assembly 455. The diameter of the second part 4512 is larger than the diameter of the first part 4511. In the present embodiment, the first hole 451f is an oil injection hole for injecting lubricating oil into the second accommodation space 452. By providing a stepped hole and making the hole diameter larger along the oil injection direction, it can prevent the accumulation when injecting lubricating oil, increasing the temporary storage and buffer space so that the lubricating oil can enter quickly. In the present embodiment, along the direction perpendicular to the third axis 403, the first hole 451f partially overlaps with the reduction gear assembly 455. In the present embodiment, the first hole 451f is configured as an observation window for the user to confirm the remaining amount of lubricating oil. When the user needs to confirm the remaining amount of lubricating oil, the plugging portion 451g is removed, and the remaining amount of lubricating oil in the second accommodation space 452 can be viewed through the first hole 451f.

[0088] As Figure 12 and Figure 14As shown, the reduction gear assembly 455 includes a first driving gear 455d, a first driven gear 455e, a second driving gear 455f, and a second driven gear 455g. Among them, the first driving gear 455d is formed or connected to the output shaft 423 of the motor, and the first driving gear 455d is coaxially arranged with the output shaft 423. The first driven gear 455e is externally meshed with the first driving gear 455d. Optionally, the first driving gear 455d and the first driven gear 455e are respectively cylindrical gears. In this embodiment, the first driving gear 455d and the first driven gear 455e constitute the first-stage reduction drive. The first driven gear 455e and the second driving gear 455f are substantially synchronous in motion. In this embodiment, the first driven gear 455e and the second driving gear 455f are coaxially arranged on the transmission shaft 455c. The second driven gear 455g is externally meshed with the second driving gear 455f. Optionally, the first driving gear 455d and the first driven gear 455e are respectively cylindrical gears. In this embodiment, the first driving gear 455d and the first driven gear 455e constitute the second-stage reduction drive. The second driven gear 455g is arranged on the intermediate shaft 455a. In this embodiment, the reduction gear assembly 455 is a two-stage reduction drive. Therefore, the second driven gear 455g is the last-stage reduction drive, and the intermediate shaft 455a and the second driven gear 455g rotate substantially synchronously. In other alternative embodiments, when a reduction drive with more than two stages is provided, a second transmission shaft 455c is provided to support the rotation of the second driven gear 455g, and the last-stage gear is arranged on the intermediate shaft 455a.

[0089] The reduction gear assembly includes a split-type gear reduction structure. Exemplarily, the reduction gear assembly includes a split-type two-stage cylindrical gear reduction structure. By adopting the split-type gear reduction structure, the load distribution along the tooth width is uniform, and the axial forces cancel each other out. As Figure 15As shown in the figure, it is an input-end split-type gear reduction structure. The reduction gear assembly 456 includes a first high-speed gear 456a and a second high-speed gear 456b that are symmetrically arranged. The first high-speed gear 456a and the second high-speed gear 456b are formed on or connected to the output shaft 423 of the motor. Exemplarily, the first high-speed gear 456a and the second high-speed gear 456b are coaxially arranged with the output shaft 423 of the motor. The first high-speed driven gear 456c is externally meshed with the first high-speed gear 456a to form a reduction drive. The second high-speed driven gear 456d is externally meshed with the second high-speed gear 456b to form a reduction drive. The first high-speed driven gear 456c and the second high-speed driven gear 456d are arranged on the transmission shaft 455c. Exemplarily, the first high-speed driven gear 456c and the second high-speed driven gear 456d are coaxially sleeved on the transmission shaft 455c. The intermediate gear 456e is arranged between the first high-speed driven gear 456c and the second high-speed driven gear 456d. Exemplarily, the intermediate gear 456e is arranged on the axis of symmetry of the first high-speed driven gear 456c and the second high-speed driven gear 456d. The intermediate gear 456e is coaxially arranged with the first high-speed driven gear 456c and the second high-speed driven gear 456d. The low-speed gear 456f is externally meshed with the intermediate gear 456e to form a reduction drive. The low-speed gear 456f is arranged on the intermediate shaft 455a. The intermediate shaft 455a outputs the torque converted by the reduction gear assembly 456.

[0090] As Figure 16 shown in the figure, it is an input-end split-type gear reduction structure. The reduction gear assembly 457 includes a high-speed gear 457a. The high-speed gear 457a is formed on or connected to the output shaft 423 of the motor. The high-speed gear 457a rotates substantially synchronously with the output shaft 423. The high-speed driven gear 457b is externally meshed with the high-speed gear 457a to form a reduction drive. The high-speed driven gear 457b is arranged on the transmission shaft 455c. The first intermediate gear 457c and the second intermediate gear 457d are symmetrically arranged on both sides of the high-speed driven gear 457b with the central axis of the high-speed driven gear 457b as the axis of symmetry. Exemplarily, the first intermediate gear 457c and the second intermediate gear 457d are coaxially sleeved on the transmission shaft 455c. The first low-speed gear 457e is externally meshed with the first intermediate gear 457c to form a reduction drive. The second low-speed gear 457f is externally meshed with the second intermediate gear 457d to form a reduction drive. The first low-speed gear 457e and the second low-speed gear 457f are arranged on the intermediate shaft 455a. Exemplarily, the first low-speed gear 457e and the second low-speed gear 457f are coaxially sleeved on the intermediate shaft 455a. The intermediate shaft 455a outputs the torque converted by the reduction gear assembly 457.

[0091] As Figure 6 and Figure 7As shown, the first axis 401, the second axis 402, and the third axis 403 are arranged parallel to each other. In the direction along the first axis 401, when projected onto a plane perpendicular to the first axis 401, the projections of the first axis 401, the second axis 402, and the third axis 403 pass through the same straight line, and this straight line is defined as the first straight line L1. Exemplarily, the first straight line L1 extends in the left-right direction. A plane passing through the first straight line L1 and extending in the direction of the first axis 401 is defined as the first plane (not shown), and the first plane is substantially a horizontal plane.

[0092] The right rear traveling wheel 411R is driven by the second traveling motor 42R. The second traveling motor 42R is connected to the right rear traveling wheel 411R through a transmission mechanism 45 that is substantially the same as the transmission mechanism 45 connected to the left rear traveling wheel 411L. For convenience of reference, the transmission mechanism 45 connected to the left rear traveling wheel 411L is defined as the left transmission mechanism 45L, and the transmission mechanism 45 connected to the right rear traveling wheel 411R is defined as the right transmission mechanism 45R. To ensure the modularity and standardization of components, the right transmission mechanism 45R and the left transmission mechanism 45L are symmetrically arranged in the left-right direction. Among them, the symmetry axis of the right transmission mechanism 45R and the left transmission mechanism 45L is the center line in the left-right direction of the right rear traveling wheel 411R and the left rear traveling wheel 411L, and the center line extends in the front-rear direction. In this embodiment, the output shaft 423 of the second traveling motor 42R takes the first axis 401 as the central axis and extends along the first axis 401. The transmission shaft 455c of the right transmission mechanism 45R takes the second axis 402 as the central axis and extends along the second axis 402. The intermediate shaft 455a of the right transmission mechanism 45R takes the third axis 403 as the central axis and extends along the third axis 403.

[0093] As Figures 1 to 4 , Figure 17 As shown, the present application provides an outdoor walking device 100. The outdoor walking device 100 includes a power supply mechanism 20, a walking mechanism 40, a parking brake mechanism 44, and a control mechanism 70. The walking mechanism 40 includes traveling wheels and a traveling motor 42 that drives the traveling wheels to rotate. The walking mechanism 40 includes a first walking mechanism 40a composed of a first traveling wheel and a traveling motor assembly that drives its rotation, and a second walking mechanism 40b composed of a second traveling wheel and a traveling motor that drives its rotation.

[0094] In this embodiment, the traveling mechanism 40 includes rear traveling wheels 411 and front traveling wheels 412. Among them, the rear traveling wheels 411 include a left rear traveling wheel 411L and a right rear traveling wheel 411R. The front traveling wheels 412 include a left front traveling wheel 412L and a right front traveling wheel 412R. The traveling motor 42 drives the rear traveling wheels 411 or the front traveling wheels 412 to rotate, so as to realize the traveling function of the outdoor traveling device 100. Optionally, the number of the traveling motors 42 can be one, two, three or four. In this embodiment, the number of the traveling motors 42 is two, and the two traveling motors 42 respectively drive the left rear traveling wheel 411L and the right rear traveling wheel 411R, so that the outdoor traveling device 100 can turn in other directions deviating from the front-rear direction. For convenience of reference, the traveling motor 42 driving the left rear traveling wheel 411L is set as the first traveling motor 42L, and the traveling motor 42 driving the right rear traveling wheel 411R is set as the second traveling motor 42R. In this embodiment, the first traveling mechanism 40a includes the left rear traveling wheel 411L and the first traveling motor 42L. The second traveling mechanism 40b includes the right rear traveling wheel 411R and the second traveling motor 42R.

[0095] See Figure 2 and Figures 18 to 19 As shown, the outdoor traveling device 100 of the present application further includes a human-computer interaction mechanism 60. In this embodiment, the outdoor traveling device 100 includes: a display device 60a for providing feedback to the user, i.e., information prompt. Among them, the display device 60a can be, for example, a sound prompt, a liquid crystal display (LCD), a light-emitting diode (LED) display, an organic light-emitting diode (OLED) display, or an electroluminescent (EL) display. The display device 60a includes: a display screen 61, a switch assembly 61b, and a plurality of operation buttons 61c. In some embodiments, the display device 60a includes: a touch screen or a touch panel, so that the switch assembly 61b and the plurality of operation buttons 61c are integrated onto the screen. The touch screen or the touch panel includes: a resistive type, a capacitive induction type, an infrared type, and a surface acoustic wave type touch screen. In this embodiment, the display screen 61 reflects the working state of the outdoor traveling device 100 on the display interface 61a. The display interface 61a is understood as the display area directly observed by the user.

[0096] The display interface 61a can display different status information as needed. For example, as described above, the controller 72 displays the position status of the handle 442a of the manual release component 442 through the display interface 61a. For example, when it is detected that the handle 442a of the manual release component 442 is in the unlocked position, the controller 72 displays an alarm-like reminder through the display interface 61a to prompt the user to reset the handle 442a. It can be that an illustration representing the handle 442a appears in the display interface 61a, that the illustration representing the handle 442a is lit, that the illustration representing the handle 442a blinks or is displayed in a special color, etc. For example, different display contents representing different position statuses of the handle 442a are set on the display interface 61a, and the user can clearly distinguish which position status the handle 442a is in through the different display contents.

[0097] The above abnormal alarm prompts include the chart on the display interface 61a being lit, the chart blinking, or being displayed in a special color. Of course, it also includes displaying special codes, special symbols, etc., and the alarm contents known from the instructions of the manual.

[0098] For another example, the display interface 61a can display information such as the speed of the traveling mechanism 40, the speed of the rotation of the working element, the energy efficiency status of the outdoor walking device 100, the remaining battery level of the battery pack 21, the normal braking or release status, etc. Also, the outdoor walking device 100 gives parking or stopping prompts, parking release or start prompts, etc. according to the user operation instructions.

[0099] As Figures 20 to 25 shown, for the structure of the traveling motor 42, still taking the first traveling motor 42L as an example. The first traveling motor 42L is an inner rotor brushless motor. The first traveling motor 42L includes a stator 421 and a rotor 422. The stator 421 includes a stator core 421a and a coil winding 421b. A plurality of radially extending stator teeth are provided on the stator 421 core, and a plurality of coil windings 421b are wound around the plurality of stator teeth. The coil winding is set as a winding of a conductive metal, such as a copper winding. The rotor 422 is rotatable relative to the stator 421, and an output shaft 423 is formed or connected to the rotor 422. The rotor 422 includes a rotor core 422a and permanent magnets. A plurality of permanent magnets are provided, and the permanent magnets are arranged at intervals along the circumferential direction of the rotor core. The permanent magnets are used to generate a magnetic field.

[0100] As Figure 20As shown in the figure, the motor housing 43 includes a motor housing body 431, a first end cover 432 and a second end cover 433 provided on both sides of the motor housing body 431. The motor housing 43 includes a motor housing body 431 having an opening at one end and a first end cover 432 for sealing the motor housing body 431. The motor housing body 431 and the first end cover 432 are hermetically connected, and the output shaft 423 extends out of the motor housing 43 through the first end cover 432. Among them, a sealed space is formed between the first end cover 432 and the gearbox 451 body (as described above). The second end cover 433 is provided in the direction opposite to the first end cover 432 of the motor housing body 431, and cables such as the signal line 437a or the power line 437b of the motor are introduced into the motor housing 43 through the second end cover 433. A first groove 432a is provided at the connection between the first end cover 432 and the motor housing body 431, and the first groove 432a accommodates the wall thickness of the motor housing body 431 or a raised portion 432b protruding from the edge of the motor housing body 431. A second groove 433c is provided at the connection between the second end cover 433 and the motor housing body 431, and the second groove 433c accommodates the wall thickness of the motor housing body 431 or a raised portion 432b protruding from the edge of the motor housing body 431. To ensure the sealing effect of the motor housing 43, an O-ring 436a is provided in the first groove 432a. When the motor housing body 431 is inserted into the first groove 432a, the O-ring 436a is compressed and filled, and the gap between the motor housing body 431 and the first groove 432a forms a sealed connection between the first end cover 432 and the motor housing body 431. Optionally, the groove width of the first groove 432a is greater than the wire diameter of the O-ring 436a. Optionally, the groove width of the first groove 432a is 2.6 mm, and the wire diameter of the O-ring 436a is 2.0 mm. To ensure the sealing effect of the motor housing 43, an O-ring 436a is provided in the second groove 433c. When the motor housing body 431 is inserted into the second groove 433c, the O-ring 436a is compressed and filled, and the gap between the motor housing body 431 and the second groove 433c forms a sealed connection between the second end cover 433 and the motor housing body 431. Optionally, the groove width of the second groove 433c is greater than the wire diameter of the O-ring 436a. Optionally, the groove width of the second groove 433c is 2.6 mm, and the wire diameter of the O-ring 436a is 2.0 mm. In this embodiment, the motor housing body 431 and the first end cover 432, and the motor housing body 431 and the second end cover 433 respectively form a static seal, and the waterproof level reaches IPX6 grade.

[0101] As Figures 21 to 23As shown, the first traveling motor 42L includes a three-phase power line 437b and a signal line 437a. A first through hole 451c for allowing the three-phase power line 437b to pass through is formed in the second end cover 433. The three-phase power line 437b is installed on a fixing member 439, and the fixing member 439 is fixed in the second end cover 433 by means of screw fastening and is located in the accommodation space. In this embodiment, the fixing member 439 fixes the position of the three-phase power line 437b relative to the motor, avoiding loosening of the three-phase power line 437b caused by the pulling process of the three-phase power line 437b.

[0102] A gasket 436b is provided for each cable of the first through hole 451c and the three-phase power line 437b, and the gasket 436b is used to fill the gap between the first through hole 451c and the cable. The gasket 436b is a tubular gasket 436b having a certain thickness and length. A corrugated protrusion 436d is provided in the inner hole 436c of the gasket 436b so that when the cable passes through the inner hole 436c, it is hermetically connected to at least one protrusion. A corrugated protrusion 436d is provided on the outer ring of the gasket 436b so that when the gasket 436b extends into the first through hole 451c, it is hermetically connected to at least one protrusion. Since the position of the three-phase power line 437b is fixed by the fixing member 439, the cable can be located at the center of the gasket 436b, thereby ensuring a good sealing effect. The first traveling motor 42L further includes a motor fixing plate 433e, and the motor fixing plate 433e is connected to the outer end of the first through hole 451c. Exemplarily, the motor fixing plate 433e is connected to the second end cover 433 and abuts against the gasket 436b. When the motor fixing plate 433e is stably fixed, the gasket 436b is compressed, so that the length direction of the gasket 436b is compressed and deformed to better seal the gap between the cable and the first through hole 451c. The motor fixing plate 433e is provided with a first accommodating portion 433f substantially corresponding to the outer contour of the gasket 436b. Exemplarily, the motor fixing plate 433e is provided with three first accommodating portions 433f, and a wire passing through hole 433g is provided at the center position of each first accommodating portion 433f for allowing the corresponding cable to pass through. A positioning flange 433h is provided on the outer periphery of the wire passing through hole 433g, and the wire outlet position of the cable is ensured to be the inner hole 436c of the gasket 436b through the wire passing through hole 433g and the positioning flange 433h, ensuring good sealing performance. In this embodiment, the waterproof level reaches IPX6.

[0103] A second through hole 433k is also formed in the second end cap 433. The second through hole 433k for allowing the signal line 437a to pass through then penetrates out of the second end cap 433. A gasket 436b is arranged between the second through hole 433k and the signal line 437a, and the gasket 436b is used to fill the gap between the second through hole 433k and the signal line 437a. The gasket 436b is a tubular gasket 436b with a certain thickness and length. A corrugated protrusion 436d is arranged in the inner hole 436c of the gasket 436b so that when the cable passes through the inner hole 436c, it is hermetically connected with at least one protrusion. A corrugated protrusion 436d is arranged on the outer ring of the gasket 436b so that when the gasket 436b extends into the second through hole 433k, it is hermetically connected with at least one protrusion. A protrusion portion 4331k extends radially in the second through hole 433k, and the protrusion portion 4331k is inserted between two corrugated protrusions 436d of the gasket 436b. The height of the protrusion portion 4331k ensures that the signal line 437a is located at the center of the inner hole 436c of the gasket 436b.

[0104] As Figure 21 and Figure 24 shown, due to the structural and functional arrangement of the second end cap 433, the second end cap 433 includes a cover body 433a and a cover plate 433b. The cover body 433a and the cover plate 433b are connected by fasteners or fastening structures. Among them, the cover plate 433b is flat, both sides of the cover body 433a are open, the cover plate 433b seals the first side opening of the cover body 433a, and the second side opening of the cover body 433a is hermetically connected to the motor housing 431. Sealant is evenly applied circumferentially to a part of the first side opening 433c of the cover body 433a to achieve surface sealing. There is no break point in the sealant. When the cover plate 433b is pressed onto the cover body 433a, the sealant overflows and fills the interface gap of the threaded connection between the cover body 433a and the cover plate 433b.

[0105] Since the overall sealing performance of the motor housing 43 is better, the traveling motor 42 has good water resistance. To balance the pressure difference between the inside and outside of the motor housing 43, the first traveling motor 42L is provided with a waterproof breathable valve 438 to ensure that when the motor wades through water or works in water, the pressure difference between the inside and outside of the motor is the same, preventing the pressure difference between the inside and outside of the motor housing 43 from being generated due to motor cooling, which may cause water to be sucked into the motor. As Figure 25As shown, a waterproof and breathable valve 438 is provided on the second end cap 433. Exemplarily, the second end cap 433 is provided with a third through hole connecting the inside and outside of the motor box 43. The waterproof and breathable valve 438 includes a valve body 438a, a hydrophobic and breathable membrane 438b, a protective layer 438c, and a sealing ring 438d. The hydrophobic and breathable membrane 438b is embedded in the valve body 438a, and the protective layer 438c is provided on the side of the hydrophobic and breathable membrane 438b facing the outside of the motor box 43. The sealing ring 438d fills the gap between the valve body 438a and the third through hole. In this embodiment, two waterproof and breathable valves 438 are arranged facing in opposite directions to achieve the effect of air convection.

[0106] As Figures 1 to 3 shown, in this embodiment, the electric lawn mower 200 is taken as an example of a manned lawn mower 200a. The manned lawn mower 200a includes: a vehicle body 10, a power supply mechanism 20, a mowing assembly 80, a traveling mechanism 40, an operating mechanism 50, and a support mechanism 90. The vehicle body 10 includes a vehicle frame 11, and the vehicle frame 11 extends basically in the front-rear direction. The vehicle frame 11 is used to mount the mowing assembly 80, the traveling mechanism 40, the operating mechanism 50, and the support mechanism 90. The mowing assembly 80 includes a mowing blade 81 and a mowing motor 82 for driving the mowing blade 81. The operating mechanism 50 includes an operating member 511. The operating member 511 is for the user to operate to control the forward, backward, and turning of the manned lawn mower 200a. Exemplarily, the operating member 511 is an operating rod, and the operating member 511 includes a left operating member 511L and a right operating member 511R that can be grasped by the user. In some embodiments, the operating mechanism 50 may further include a steering wheel assembly. The support mechanism 90 is used to support the operator, and the support mechanism 90 is mounted on the vehicle body 10. Optionally, the support mechanism 90 includes a seat 91. The seat 91 is mounted to the vehicle frame 11 for the user to sit on. In other alternative embodiments, the support mechanism 90 further includes a platform for the user to stand on. The power supply mechanism 20 is used to provide energy for the mowing assembly 80, the traveling mechanism 40, etc., so that the manned lawn mower 200a can be used as an electric tool capable of carrying people. Compared with the fuel-powered manned lawn mower 200a, the electric manned lawn mower 200a is more environmentally friendly and more energy-saving. In some embodiments, the manned lawn mower 200a further includes a grass collection device for collecting the grass clippings cut by the mowing assembly 80. The grass collection device includes a grass collection basket assembly, and the grass collection basket assembly is detachably mounted behind the seat 91. The manned lawn mower 200a further includes a braking mechanism 46, and the braking mechanism 46 is used to perform a braking action to brake the traveling mechanism 40. The braking mechanism 46 includes a braking state for braking the traveling assembly and a release state for releasing the traveling assembly. The braking mechanism 46 responds to the user's trigger instruction to enter the braking state and the release state.

[0107] As Figure 26a , Figure 26b and Figure 28As shown, in some embodiments, the connecting members of the power supply mechanism 20 include a first connecting member 22a and a second connecting member 22b with different outer shape features. Specifically, the first connecting member 22a is configured to electrically connect a battery pack 21, and the second connecting member 22b is configured to electrically connect at least two battery packs 21. The outer dimension of the second connecting member 22b is larger than that of the first connecting member 22a. In this way, by providing connecting members 22 with different outer dimensions for mounting the battery pack 21, the power consumption requirements of different outdoor walking devices 100 can be met. For example, for a push mower or a snow blower 100d, the power supply mechanism 20 can select the first connecting member 22a to mount the battery pack. For an all-terrain vehicle 100c, multiple first connecting members 22a with mounted battery packs 21 can be used, or one or more second connecting members 22b with mounted at least two battery packs 21 can be used, or a combination of the first connecting member 22a and the second connecting member 22b can be adopted. In this way, by reasonably selecting and arranging the connecting members for mounting the battery pack in combination with the power consumption requirements and the spatial characteristics of the outdoor walking device 100, the versatility of the power supply mechanism 20 among various electrical devices is improved, so that the application scenarios of the power supply mechanism 20 are more extensive, providing convenience for users.

[0108] In some embodiments, the connecting member 22 can be a battery compartment having an accommodation space and a coupling portion, or other types of structures for mounting the battery pack 21 to the ride-on mower 200a. Hereinafter, the battery compartment 22 is used to replace the connecting member 22. Of course, the connecting member can also have other outer shape features, such as a base.

[0109] The overall battery pack 21 meets the IPX7 waterproof and dustproof requirements, and the battery compartment end meets the IPX5 waterproof requirement. The average discharge current of the battery pack 21 is greater than or equal to 30A, for example, it can be 30A, 35A, 40A, etc. Optionally, the rated current output by the battery pack 21 can be made greater than or equal to 120A or the instantaneous peak current can be about 350A.

[0110] In this embodiment, the weight of the battery pack 21 is greater than or equal to 9 Kg. In one embodiment, the weight of the battery pack 21 is greater than or equal to 10 Kg, or greater than or equal to 11 Kg, or greater than or equal to 12 Kg, or greater than or equal to 13 Kg, or greater than or equal to 14 Kg, or greater than or equal to 15 Kg. For example, the weight of the battery pack 21 is 9 Kg, 10 Kg, or 15 Kg, etc. The nominal voltage of the battery pack 21 is about 56 V. For example, it can be 54 V or 58 V, etc. In one embodiment, the nominal voltage of the battery pack 21 is greater than or equal to 56 V, or the nominal voltage of the battery pack 21 is greater than or equal to 50 V, or the nominal voltage of the battery pack 21 is greater than or equal to 48 V, or the nominal voltage of the battery pack 21 is greater than or equal to 40 V. The capacity of the battery pack 21 is greater than or equal to 20 Ah. In one embodiment, the capacity of the battery pack 21 is greater than or equal to 30 Ah, or the capacity of the battery pack 21 is greater than or equal to 40 Ah, or the capacity of the battery pack 21 is greater than or equal to 50 Ah. For example, it can be 20 Ah, 30 Ah, 40 Ah, 50 Ah, etc. The ratio of the capacity to the weight of the battery pack 21 is greater than or equal to 2 Ah / kg. For example, 2 Ah / kg, 4 Ah / kg, 5 Ah / kg, etc. Optionally, the energy of the battery pack 21 is greater than or equal to 2 kW·h. In one embodiment, the energy of the battery pack 21 is greater than or equal to 3 kW·h, or the energy of the battery pack 21 is greater than or equal to 4 kW·h, or the energy of the battery pack 21 is greater than or equal to 5 kW·h. For example, the energy of the battery pack 21 can be 2 kW·h, 3 kW·h, 4 kW·h, 5 kW·h, etc. In some embodiments, the battery pack 21 disclosed in this application may include lithium iron phosphate battery cells. In some embodiments, the battery pack 21 can also be a supercapacitor, also known as an electrochemical capacitor.

[0111] In some embodiments, referring to Figure 27 As shown, the second battery compartment 22b can also be adapted to a third battery pack 21c different from the battery pack 21. Specifically, two third battery packs 21c are installed on the adapter 21d and electrically connected to the adapter 21d, and the adapter 21d is electrically connected to the joint of the second battery compartment 22b. Among them, the energy of the third battery pack 21c is greater than or equal to 0.1 kW·h and less than 2 kW·h. Optionally, the third battery pack 21c is a battery pack 21 with an energy greater than or equal to 0.1 kW·h. In some embodiments, the third battery pack 21c is a battery pack 21 with an energy greater than or equal to 0.4 kW·h. In some embodiments, the third battery pack 21c is a battery pack 21 with an energy greater than or equal to 0.6 kW·h. In this embodiment, the third battery pack 21c is a lithium battery cell, and it can also be selected from materials such as nickel-cadmium batteries and graphene to achieve different combinations of battery characteristics.

[0112] Continuing to refer to Figure 28As shown, the power supply mechanism 20 further includes a power management module 23. The power management module 23 includes a housing 231. All signal interfaces 232 and high-current interfaces 233 are directly made on the housing 231. There is no additional wire harness and the waterproof performance of the power management module 23 can be guaranteed to reach the IPX5 level. Specifically, a wire terminal cap is added to the wire end of the high-current interface 232, and a waterproof rubber sleeve is added to the terminal post.

[0113] The foregoing has shown and described the basic principles, main features, and advantages of the present application. Those skilled in the art should understand that the above embodiments do not limit the present application in any form. Any technical solutions obtained by means of equivalent replacement or equivalent transformation fall within the protection scope of the present application.

Claims

1. An outdoor walking device, comprising: A vehicle body, wherein the vehicle body is provided with running wheels; A power unit, comprising a motor having an output shaft and a power transmission unit for transmitting the driving force of the output shaft to the travel wheel; A power supply mechanism, providing electrical energy to the power unit; Features: The power transmission unit includes an electromagnetic brake mechanism and a speed reduction mechanism, wherein the electromagnetic brake mechanism generates a braking force to brake the rotation of the output shaft; The speed reduction mechanism converts the torque of the output shaft and transmits it to the running wheel; In the extending direction of the output shaft, at least a portion of the electromagnetic brake mechanism is located between the motor and the speed reduction mechanism.

2. The outdoor walking equipment according to claim 1, characterized in that: The electromagnetic brake mechanism is arranged at one end of the output shaft close to the traveling wheel.

3. The outdoor walking equipment according to claim 2, characterized in that: The motor includes a first end cover arranged at one side of the stator; the speed reduction mechanism and the first end cover surround to form a substantially sealed accommodation space, and the accommodation space is used to accommodate the electromagnetic brake mechanism.

4. The outdoor walking equipment according to claim 1, characterized in that: The speed reduction mechanism includes a gear and a gear box for accommodating the gear, and the electromagnetic brake mechanism is at least partially mounted on the gear box.

5. The outdoor walking equipment according to claim 1, characterized in that: The device also includes a manual release assembly, which is operated by a user to release the electromagnetic brake mechanism from braking the output shaft or drive the electromagnetic brake mechanism to brake the output shaft.

6. The outdoor walking equipment according to claim 5, characterized in that: The speed reduction mechanism includes a gear and a gear box for accommodating the gear, and at least a portion of the manual release assembly is mounted on the gear box.

7. The outdoor walking equipment according to claim 6, characterized in that: The manual release assembly includes a handle for user operation, wherein the handle at least partially extends out of the gear box and is exposed outside the vehicle body.

8. The outdoor walking equipment according to claim 5, characterized in that: The electromagnetic brake mechanism: Electromagnets, which generate electromagnetic force when powered on; a pressure plate configured to have a first position driven by the electromagnet away from the electromagnet and a second position close to the electromagnet; a brake pad, wherein when the pressure plate is in a first position, the brake pad brakes the output shaft; The manual release assembly is connected to the pressing plate and drives the pressing plate to move between the first position and the second position.

9. The outdoor walking equipment according to claim 1, characterized in that: It also includes a controller for controlling the electromagnetic braking mechanism to switch between a first state of braking the output shaft and a second state of releasing the output shaft; wherein the electromagnetic braking mechanism is in the first state in a power-off state.

10. The outdoor walking equipment according to claim 9, characterized in that: It also includes a detection component, which detects the position state of a handle operated by a user to switch whether to brake the output shaft, and the detection component is connected to the controller.

11. An electric lawn mower comprising: A vehicle body, wherein the vehicle body is provided with running wheels; A power unit, comprising a motor having an output shaft and a power transmission unit for transmitting the driving force of the motor to the travel wheel; a mowing assembly, including a mowing blade; A power supply mechanism, providing electrical energy to the power unit; It is characterized in that The power transmission unit includes an electromagnetic brake mechanism and a transmission mechanism, wherein the electromagnetic brake mechanism generates a braking force to brake the rotation of the output shaft; The transmission mechanism is used to transmit the torque output by the motor to the running wheel; Wherein, the electromagnetic braking mechanism is arranged on a side of the motor close to the transmission mechanism.

12. A power unit, suitable for outdoor walking equipment, comprising: a stator having a stator core, a plurality of stator teeth extending radially from the stator core, and a plurality of windings wound around the plurality of stator teeth; a rotor rotatable relative to the stator and having a rotor core and a plurality of permanent magnets fixed to the rotor core; a first end cap disposed on a first side of the stator; a second end cap disposed on a second side of the stator; A transmission mechanism, used for converting or transmitting the torque output by the rotor to the outdoor walking equipment; It is characterized by further comprising: a parking brake mechanism, generating a braking force to brake the rotation of the rotor; The transmission mechanism comprises a gear housing, and the gear housing and the first end cover form a substantially sealed space to accommodate the parking brake mechanism.

13. The power unit according to claim 12, characterized in that: The parking brake mechanism includes an electromagnetic brake.

14. The power unit according to claim 12, characterized in that: The outdoor walking equipment includes an electric lawn mower and an all-terrain vehicle.

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