Manned mower and outdoor walking equipment

Abstract

The invention discloses a manned mower and outdoor walking equipment. The manned mower comprises: a frame; the walking wheel set is mounted on the frame; the walking wheel set at least comprises rear walking wheels, and the rear walking wheels comprise the first walking wheel and the second walking wheel. The walking motor is provided with a driving shaft and is used for driving the walking wheel set; a mowing element; the mower is driven by a mowing motor; the power supply assembly comprises at least one battery pack and is used for supplying power to the walking motor and / or the mowing motor; the ratio of the distance L1 between the first walking wheel and the second walking wheel to the radius R of the first walking wheel is larger than or equal to 6. The invention provides a manned mower which can adapt to a working condition with a higher slope and has better ramp operation capacity.

Description

Technical Field

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

[0002] Outdoor walking devices in the related art are used for outdoor operations. For example: manned snow blowers, manned lawn mowers, all-terrain vehicles, etc. When a manned lawn mower is working, problems such as large phase current during flat turning and weak ability to drive on ramps at the limit occur.

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

[0004] An object of the present application is to solve or at least mitigate part or all of the above problems. For this purpose, an object of the present application is to provide a manned lawn mower with ramp operation ability, which has lower torque requirements for the motor during turning operation and ramp operation, slower temperature rise, and stronger endurance.

[0005] To achieve the above object, the present application adopts the following technical solution: A manned lawn mower, comprising: a frame; a walking wheel set installed on the frame; the walking wheel set at least includes rear walking wheels, and the rear walking wheels include a first walking wheel and a second walking wheel; a walking motor having a drive shaft for driving the walking wheel set; a mowing element driven by a mowing motor; a power supply assembly including at least one battery pack for supplying power to the walking motor and / or the mowing motor; the ratio of the distance L1 between the first walking wheel and the second walking wheel to the radius R of the first walking wheel ≥ 6.

[0006] In some embodiments, the distance L1 between the first walking wheel and the second walking wheel ≥ 1200mm.

[0007] In some embodiments, the distance L1 between the first walking wheel and the second walking wheel ≥ 1250mm.

[0008] In some embodiments, the radius R of the first walking wheel ≤ 200mm.

[0009] In some embodiments, the radius R of the first walking wheel and the second walking wheel ≤ 180mm.

[0010] In some embodiments, the total energy of the power supply assembly is greater than or equal to 2kW·h and less than or equal to 10kW·h.

[0011] In some embodiments, the distance L2 from the midpoint of the line connecting the centers of the first walking wheel and the second walking wheel to the center of gravity of the manned lawn mower ≤ 200mm.

[0012] In some embodiments, when traveling on a ramp with a slope of 10° ≤ slope ≤ 20°, the maximum torque required for the first driving wheel and / or the second driving wheel to travel is ≤ 70 N·m.

[0013] In some embodiments, at least one battery pack is detachably mounted on the vehicle frame.

[0014] In some embodiments, the driving motor includes at least a first driving motor and a second driving motor. The first driving motor is used to drive the first driving wheel, and the second driving motor is used to drive the second driving wheel.

[0015] In some embodiments, the manned mower is a ride-on mower or a stand-on mower.

[0016] In some embodiments, the energy of at least one battery pack of the power supply assembly is greater than or equal to 100 W·h and less than or equal to 2 kW·h.

[0017] This application also discloses a technical solution: a manned mower, including a vehicle frame; a driving wheel set mounted on the vehicle frame; the driving wheel set includes at least rear driving wheels, and the rear driving wheels include a first driving wheel and a second driving wheel; a driving motor having a driving shaft for driving the driving wheel set; a mowing element driven by a mowing motor; a power supply assembly including at least one battery pack for supplying power to the driving motor and / or the mowing motor; the distance L1 between the first driving wheel and the second driving wheel is ≥ 1200 mm.

[0018] In some embodiments, the distance L1 between the first driving wheel and the second driving wheel is ≥ 1250 mm.

[0019] In some embodiments, the radius R of the first driving wheel and the second driving wheel is ≤ 200 mm.

[0020] This application also discloses a technical solution: an outdoor walking device, including: a vehicle frame; a driving wheel set mounted on the vehicle frame; the driving wheel set includes at least rear driving wheels, and the rear driving wheels include a first driving wheel and a second driving wheel; a driving motor having a driving shaft for driving the driving wheel set; a mowing element driven by a mowing motor; a power supply assembly including at least one battery pack for supplying power to the driving motor and / or the mowing motor; the ratio of the distance L1 between the first driving wheel and the second driving wheel to the radius R of the first driving wheel is ≥ 6.

[0021] In some embodiments, the outdoor walking device is a manned snow sweeper, a manned mower or an all-terrain vehicle. Description of the Drawings

[0022] Figure 1 is a schematic structural diagram of a manned mower according to an embodiment of the present application;

[0023] Figure 2 is Figure 1 a schematic structural view of a manned lawn mower from another perspective in

[0024] Figure 3 is Figure 1 a top view of the manned lawn mower in

[0025] Figure 4 a schematic plan view of the manned lawn mower according to an embodiment of the present application;

[0026] Figure 5 a correlation diagram of the wheel radius and the maximum torque required to drive the first driving wheel under the first working condition;

[0027] Figure 6 a correlation diagram of the wheel radius and the maximum torque required to drive the second driving wheel under the first working condition;

[0028] Figure 7 a correlation diagram of the wheel span and the maximum torque required to drive the first driving wheel under the first working condition;

[0029] Figure 8 a correlation diagram of the wheel span and the maximum torque required to drive the second driving wheel under the first working condition;

[0030] Figure 9 a correlation diagram of the eccentric distance and the maximum torque required to drive the first driving wheel under the first working condition;

[0031] Figure 10 a correlation diagram of the eccentric distance and the maximum torque required to drive the second driving wheel under the first working condition;

[0032] Figure 11 a correlation diagram of the vehicle weight and the maximum torque required to drive the first driving wheel under the first working condition;

[0033] Figure 12 a correlation diagram of the vehicle weight and the maximum torque required to drive the second driving wheel under the first working condition;

[0034] Figure 13 a sensitivity relationship diagram of the maximum torque required to drive the first driving wheel to the wheel radius, wheel span, eccentric distance and vehicle weight under the first working condition;

[0035] Figure 14 a sensitivity relationship diagram of the maximum torque required to drive the second driving wheel to the wheel radius, wheel span, eccentric distance and vehicle weight under the first working condition;

[0036] Figure 15 a correlation diagram of the wheel radius and the maximum torque required to drive the first driving wheel under the second working condition;

[0037] Figure 16 It is a correlation diagram of the wheel radius and the maximum torque required to drive the second driving wheel under the second working condition;

[0038] Figure 17 It is a correlation diagram of the wheel span and the maximum torque required to drive the first driving wheel under the second working condition;

[0039] Figure 18 It is a correlation diagram of the wheel span and the maximum torque required to drive the second driving wheel under the second working condition;

[0040] Figure 19 It is a correlation diagram of the eccentric distance and the maximum torque required to drive the first driving wheel under the second working condition;

[0041] Figure 20 It is a correlation diagram of the eccentric distance and the maximum torque required to drive the second driving wheel under the second working condition;

[0042] Figure 21 It is a correlation diagram of the vehicle weight and the maximum torque required to drive the first driving wheel under the second working condition;

[0043] Figure 22 It is a correlation diagram of the vehicle weight and the maximum torque required to drive the second driving wheel under the second working condition;

[0044] Figure 23 It is a sensitivity relationship diagram of the maximum torque required to drive the first driving wheel to the wheel radius, wheel span, eccentric distance and vehicle weight under the second working condition;

[0045] Figure 24 It is a sensitivity relationship diagram of the maximum torque required to drive the second driving wheel to the wheel radius, wheel span, eccentric distance and vehicle weight under the second working condition. Detailed implementation manners

[0046] Before explaining in detail any implementation manner of the present application, 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.

[0047] In the present application, the terms "include", "comprise", "have" or any other variant thereof are intended to cover non-exclusive inclusion, so 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 an..." does not exclude the existence of additional identical elements in the process, method, article or device including that element.

[0048] In this application, the term "and / or" describes the relationship between associated objects and represents three possible relationships. For example, A and / or B can represent three cases: A exists alone, both A and B exist simultaneously, and B exists alone. Additionally, in this application, the character " / " generally indicates that the associated objects before and after are in an "and / or" relationship.

[0049] In this application, the terms "connected", "combined", "coupled", and "mounted" can be direct connections, combinations, couplings, or mountings, or they can be indirect connections, combinations, couplings, or mountings. Here, by way of example, a direct connection means that two parts or components are connected together without the need for an intermediate member, and an indirect connection means that two parts or components are each 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.

[0050] In this application, those of ordinary skill in the art will understand that relative terms used in combination 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 due to 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. A relative term can refer to a plus or minus of a certain percentage (such as 1%, 5%, 10% or more) of the indicated value. Numerical values that do not employ relative terms should also be disclosed as having tolerances. In addition, when expressing a relative angular positional relationship (such as substantially parallel, substantially perpendicular), "substantially" can refer to a plus or minus a certain number of degrees (such as 1 degree, 5 degrees, 10 degrees or more) from the indicated angle.

[0051] 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.

[0052] In this application, the orientation terms such as "upper", "lower", "left", "right", "front", and "rear" 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 component is connected "above" or "below" another component, it can not only be directly connected "above" or "below" another component, but also be indirectly connected "above" or "below" another component through an intermediate component. It should also be understood that the orientation terms such as the upper side, the lower side, the left side, the right side, the front side, and the rear side not only represent the positive orientation, but can also be understood as the side orientation. For example, the lower side can include directly below, lower left, lower right, lower front, and lower rear, etc.

[0053] In this application, the terms "controller", "processor", "central processor", "CPU", and "MCU" can be used interchangeably. When using the units "controller", "processor", "central processor", "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.

[0054] In this application, the terms "device", "module", or "unit" can be implemented in the form of hardware or software in order to achieve specific functions.

[0055] 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.).

[0056] As Figure 1 shown, the outdoor walking device 100 disclosed in this application can specifically be an electric wheeled device, such as a manned lawn mower, which can be used for a user to ride or stand on it 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 Figure 1 the directions shown in. Specifically, when a user rides on the outdoor walking device 100 located on the ground, the direction the user faces is defined as the front, the direction the user has his back to 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 lower, and the direction away from the ground is defined as the upper. Of course, the outdoor walking device disclosed in this application also includes on an all-terrain vehicle (UTV, Utility Vehicle). In the related art, all-terrain vehicles include four-wheel all-terrain vehicles (ATV, All Terrain Vehicle), multi-functional all-terrain vehicles, and recreational off-road vehicles. In addition, the outdoor walking device disclosed in this application also includes manned snow blowers, push lawn mowers, push snow blowers, all-terrain vehicles, and electric motorcycles, etc.

[0057] SeeFigures 1 to 3 As shown, the outdoor walking device 100 includes: a housing assembly 10, a power supply assembly 20, and a walking assembly 40. Among them, the walking assembly 40 includes a walking wheel set 41 and a walking motor 42. The walking motor 42 has a drive shaft for driving the walking wheel set 41 to rotate. The power supply assembly 20 is used to supply power to the outdoor walking device 100. Specifically, the power supply assembly 20 supplies power to the walking motor 42.

[0058] The power supply assembly 20 includes a battery pack and a connector for installing the battery pack to connect the battery pack to the outdoor walking device 100. The battery pack is detachably connected to the connector, and the connector is detachably installed on the outdoor walking device 100 so that it can be taken out to adapt to other electrical devices. Among them, other electrical devices include but are not limited to all-terrain vehicles, push mowers, push snow blowers, and ride-on mowers. Specifically, the power supply assembly 20 of the outdoor walking device 100 can be detachably removed from the outdoor walking device 100 and then installed on an all-terrain vehicle, a push mower, a push snow blower, a ride-on mower, a stand-on mower to supply power to these electrical devices to achieve the functions of the above-mentioned power supply devices.

[0059] In some embodiments, the battery pack disclosed in the present application may include lithium iron phosphate battery cells. In some embodiments, the battery pack may also be a supercapacitor, also known as an electrochemical capacitor.

[0060] Continue to refer to Figures 1 to 3, when the outdoor walking device is specifically a manned lawn mower 100, the manned lawn mower 100 includes: a housing assembly 10, a power supply assembly 20, a mowing assembly 30, a walking assembly 40, an operation assembly 50, a frame 11, and a support portion. Among them, the frame 11 extends substantially in the front-rear direction and forms the main body of the manned lawn mower 100 together with the housing assembly 10, and is used to install the power supply assembly 20, the mowing assembly 30, the walking assembly 40, and the support portion. The walking assembly 40 is used to support the main body. The operation assembly 50 includes an operation rod assembly 51, and the operation rod assembly 51 is for the user to operate to control the forward, backward, and turning of the manned lawn mower. In some embodiments, the operation assembly 50 may further include a steering wheel assembly. The support portion is installed on the frame 11 and is used to support the operator. Optionally, the support portion includes a seat 91. The seat 91 is installed on the frame 11 and is for the user to sit on. Optionally, the support portion further includes a platform for the user to stand on. The power supply assembly 20 is used to provide energy for the mowing assembly 30, the walking assembly 40, etc., so that the manned lawn mower 100 can be used as an electric tool capable of carrying people. Compared with fuel-powered manned lawn mowers, electric manned lawn mowers are more environmentally friendly and more energy-saving. In some embodiments, the manned lawn mowing device 100 further includes a grass collection device for collecting the grass clippings cut by the mowing assembly 30. The grass collection device includes a grass collection basket assembly, and the grass collection basket assembly is detachably installed behind the seat 91.

[0061] In some embodiments, the walking assembly 40 includes a walking wheel set 41 and a walking motor 42. The walking motor 42 has a drive shaft for driving the walking wheel set 41 to rotate. The walking wheel set 41 is connected to the main body to support the main body. The walking wheel set 41 can at least drive the manned lawn mower 100 to walk in the front-rear direction. Optionally, the walking wheel set 41 includes rear walking wheels, and the rear walking wheels include a first walking wheel 411 and a second walking wheel 412. In this embodiment, the first walking wheel 411 is the left rear wheel, and the second walking wheel 412 is the right rear wheel. In other embodiments, the first walking wheel 411 is the right rear wheel, and the second walking wheel 412 is the left rear wheel, which is not specifically limited herein. Optionally, the walking wheel set 41 further includes a third walking wheel 413 and a fourth walking wheel 414. Both the third walking wheel 413 and the fourth walking wheel 414 are front wheels. In this embodiment, the third walking wheel 413 is the left front wheel, and the fourth walking wheel 414 is the right front wheel. In other embodiments, the third walking wheel 413 is the left rear wheel, and the fourth walking wheel 414 is the right rear wheel, which is not specifically limited herein.

[0062] The traveling motor 42 drives the traveling wheel set 41 to rotate, so as to realize the traveling function of the manned mower 100. Optionally, the number of traveling motors 42 can be one, two, three or four. In this embodiment, the number of traveling motors 42 is two, and the two traveling motors 42 respectively drive the first traveling wheel 411 or the second traveling wheel 412, so that the manned mower 100 can turn in other directions deviating from the front-rear direction.

[0063] The power supply assembly 20 is at least used to supply power to the traveling motor 42. The power supply assembly 20 includes at least one battery pack. In some embodiments, the number of battery packs included in the power supply assembly 20 is 3, 4, 5, 6, 7, 8 or more. In some embodiments, at least one battery pack of the power supply assembly 20 is detachably mounted to the manned mower 100. The energy of at least one battery pack of the power supply assembly 20 is greater than or equal to 100 W·h and less than or equal to 2 kW·h. In some embodiments, the power supply assembly 20 includes at least one large-capacity battery pack, and the energy of this battery pack is greater than or equal to 1 kW·h and less than or equal to 30 kW·h.

[0064] In this application, the manned mower 100 is taken as a specific embodiment. In fact, the manned mower includes but is not limited to a stand-on mower and a ride-on mower.

[0065] Manned mowers, especially zero-turn radius (ZTR) mowers, can achieve in-situ turning and have high working efficiency. However, since they are non-road vehicles and the operating environment is complex, they are often used in complex working environments such as slopes and depressions. When working, problems such as large phase current during flat turning and weak ramp limit driving ability will occur.

[0066] The manned mower disclosed in this application, as Figure 3 and Figure 4 shown, the ratio of the distance L1 between the first traveling wheel 411 and the second traveling wheel 412 to the radius R of the first traveling wheel 411 ≥ 6. Wherein, the distance L1 between the first traveling wheel 411 and the second traveling wheel 412 refers to the distance between the axis center of the first traveling wheel 411 and the axis center of the second traveling wheel 412. The radius R of the first traveling wheel 411 refers to the radius of the first traveling wheel 411 including the tire.

[0067] Through analysis, it is found that both the distance L1 between the first driving wheel 411 and the second driving wheel 412 and the radius R of the first driving wheel 411 have an impact on the maximum torque required for the driving motor 42 to drive the first driving wheel 411 and the second driving wheel 412 to move. At the same target wheel speed, when the ratio of the distance L1 between the first driving wheel 411 and the second driving wheel 412 to the radius R of the first driving wheel 411 ≥ 6, the maximum torque required for the driving motor 42 to drive the first driving wheel 411 and the second driving wheel 412 to move is significantly reduced compared to conventional manned lawn mowers. Reducing the torque can improve the endurance time, reduce the temperature rise, and improve the ultimate working ability, etc. Therefore, the manned lawn mower can adapt to working conditions with a higher slope and has better operation ability under the ultimate working condition of slope slip.

[0068] The following elaborates on the specific process of finding that both the distance L1 between the first driving wheel 411 and the second driving wheel 412 and the radius R of the first driving wheel 411 have an impact on the maximum torque required for the driving motor 42 to drive the first driving wheel 411 and the second driving wheel 412 to move. First, a dynamic model of the manned lawn mower is established, then the dynamic model is calibrated, and finally, the linear relationship of the maximum torque required to drive the first driving wheel 411 and the second driving wheel 412 to move under different parameters in different working conditions at the same target wheel speed is obtained.

[0069] Exemplarily, in the first working condition, the manned lawn mower is in a left-turning condition. Specifically, the user operates the operating part to make the first driving wheel 411 rotate forward at half of the allowed maximum speed, and the second driving wheel 412 rotate forward at the allowed maximum speed. Figure 5 It is a graph showing the correlation between the wheel radius and the maximum torque required to drive the first driving wheel 411 under the first working condition. Figure 6 It is a graph showing the correlation between the wheel radius and the maximum torque required to drive the second driving wheel 412 under the first working condition. Figure 5 and Figure 6 The dashed lines in represent the linear fitting relationship between the wheel radius and the maximum torque. Among them, Figure 5 and Figure 6 The wheel radius in is the radius R of the first driving wheel 411. From Figure 5 and Figure 6 it can be seen that under the first working condition, there is a linear correlation between the radius R and the maximum torque required to drive the first driving wheel 411 and the second driving wheel 412 to move at the same target wheel speed.

[0070] Figure 7 It is a graph showing the correlation between the wheel span and the maximum torque required to drive the first driving wheel 411 under the first working condition. Figure 8 It is a graph showing the correlation between the wheel span and the maximum torque required to drive the second driving wheel 412 under the first working condition. Figure 7 and Figure 8The dashed line in [X] represents the linear fitting relationship between the wheel span and the maximum torque. Among them, Figure 7 and Figure 8 the wheel span in [X] is the distance L1 between the first driving wheel 411 and the second driving wheel 412. It can be seen from Figure 7 and Figure 8 that under the first working condition, there is a linear correlation between the distance L1 between the first driving wheel 411 and the second driving wheel 412 and the maximum torque required to drive the first driving wheel 411 and the second driving wheel 412 at the same target wheel speed.

[0071] Figure 9 Figure [X] is the correlation diagram between the eccentric distance and the maximum torque required to drive the first driving wheel 411 under the first working condition. Figure 10 Figure [X] is the correlation diagram between the eccentric distance and the maximum torque required to drive the second driving wheel 412 under the first working condition. Figure 9 and Figure 10 the solid line in [X] represents the relationship between the eccentric distance and the maximum torque. Figure 9 and Figure 10 the dashed line in [X] represents the linear fitting relationship between the eccentric distance and the maximum torque. Figure 9 and Figure 10 the double lines coincide in [X], indicating that the eccentric distance and the maximum torque are completely linearly correlated. Among them, Figure 9 and Figure 10 the eccentric distance in [X] is the distance L2 from the midpoint d of the connection line between the axis of the first driving wheel 411 and the axis of the second driving wheel 412 to the center of gravity G of the ride-on mower. It can be seen from Figure 9 and Figure 10 that under the first working condition, there is a linear correlation between the distance L2 from the midpoint d of the connection line between the axis of the first driving wheel 411 and the axis of the second driving wheel 412 to the center of gravity G of the ride-on mower and the maximum torque required to drive the first driving wheel 411 and the second driving wheel 412 at the same target wheel speed.

[0072] Figure 11 Figure [X] is the correlation diagram between the total vehicle weight and the maximum torque required to drive the first driving wheel 411 under the first working condition, Figure 12 Figure [X] is the correlation diagram between the total vehicle weight and the maximum torque required to drive the second driving wheel 412 under the first working condition, Figure 11 and Figure 12 the solid line in [X] represents the relationship between the total vehicle weight and the maximum torque, Figure 11 and Figure 12 the dashed line in [X] represents the linear fitting relationship between the total vehicle weight and the maximum torque. The total vehicle weight is the total weight of the ride-on mower, Figure 11 and Figure 12 the double lines coincide in [X], indicating that the total vehicle weight and the maximum torque are completely linearly correlated, as shown in Figure 11 and Figure 12It can be seen that under the first working condition, there is a linear correlation between the vehicle weight and the maximum torque required to drive the first driving wheel 411 and the second driving wheel 412 to travel at the same target wheel speed.

[0073] Figure 13 It is a sensitivity relationship diagram of the maximum torque required to drive the first driving wheel 411 under the first working condition with respect to the wheel radius, wheel span, eccentricity distance, and vehicle weight. Figure 14 It is a sensitivity relationship diagram of the maximum torque required to drive the second driving wheel 412 under the first working condition with respect to the wheel radius, wheel span, eccentricity distance, and vehicle weight. Sensitivity refers to the change in the maximum torque caused by a unit change in the independent variable. The independent variables include the wheel radius, wheel span, eccentricity distance, and vehicle weight. As Figure 13 and Figure 14 It can be seen that the wheel radius, wheel span, eccentricity distance, and vehicle weight all have an impact on the maximum torque. That is, under the first working condition, L1, R, L2, and the vehicle weight all have an impact on the maximum torque required for the traveling motor 42 to drive the first driving wheel 411 and the second driving wheel 412 to travel; at the same time, L1 and R have a greater impact on the maximum torque required for the traveling motor 42 to drive the first driving wheel 411 and the second driving wheel 412 to travel; L1 has the greatest impact on the maximum torque required for the traveling motor 42 to drive the first driving wheel 411 and the second driving wheel 412 to travel.

[0074] Exemplarily, in the second working condition, the ride-on mower is in a left-turning condition. The user operates the operating member to make the first driving wheel 411 rotate backward at the maximum allowable speed and the second driving wheel 412 rotate forward at the maximum allowable speed. Figure 15 It is a correlation relationship diagram between the wheel radius and the maximum torque required to drive the first driving wheel 411 under the second working condition. Figure 16 It is a correlation relationship diagram between the wheel radius and the maximum torque required to drive the second driving wheel 412 under the second working condition. Figure 15 and Figure 16 The dashed lines in Figure 15 and Figure 16 represent the linear fitting relationship between the wheel radius and the maximum torque. The wheel radius in Figure 15 and Figure 16 is the radius R of the first driving wheel 411. As Figure 15 and Figure 16 It can be seen that under the second working condition, there is a linear correlation between the radius R and the maximum torque.

[0075] Figure 17 It is a correlation relationship diagram between the wheel span and the maximum torque required to drive the first driving wheel 411 under the second working condition. Figure 18 It is a correlation relationship diagram between the wheel span and the maximum torque required to drive the second driving wheel 412 under the second working condition. Figure 17 and Figure 18 The dashed lines inFigure 17 and Figure 18 the wheel span in Figure 18 is the distance L1 between the first driving wheel 411 and the second driving wheel 412, as shown in Figure 17 and Figure 18 it can be seen that under the second working condition, there is a linear correlation between the distance L1 between the first driving wheel 411 and the second driving wheel 412 and the maximum torque.

[0076] Figure 19 Figure Figure 20 is the correlation diagram between the eccentric distance and the maximum torque required to drive the first driving wheel 411 under the second working condition, Figure 19 and Figure 20 the dotted line in Figure 20 represents the linear fitting relationship between the eccentric distance and the maximum torque, Figure 19 and Figure 20 the solid line in Figure 20 represents the relationship between the eccentric distance and the maximum torque, Figure 19 and Figure 20 the double lines coincide in Figure 20 , indicating that the eccentric distance and the maximum torque are completely linearly correlated, Figure 19 and Figure 20 the eccentric distance in Figure 20 is the distance L2 from the midpoint d of the line connecting the centers of the first driving wheel 411 and the second driving wheel 412 to the center of gravity G of the ride-on mower, as shown in Figure 19 and Figure 20 it can be seen that under the second working condition, there is a linear correlation between the distance L2 from the midpoint d of the line connecting the centers of the first driving wheel 411 and the second driving wheel 412 to the center of gravity G of the ride-on mower and the maximum torque.

[0077] Figure 21 Figure Figure 22 is the correlation diagram between the total vehicle weight and the maximum torque required to drive the first driving wheel 411 under the second working condition, Figure 21 and Figure 22 the dotted line in Figure 22 represents the linear fitting relationship between the total vehicle weight and the maximum torque, Figure 21 and Figure 22 the solid line in Figure 22 represents the relationship between the total vehicle weight and the maximum torque, Figure 21 and Figure 22 the double lines coincide in Figure 22 , indicating that the total vehicle weight and the maximum torque are completely linearly correlated. The total vehicle weight is the total weight of the ride-on mower, as shown in Figure 21 and Figure 22 it can be seen that under the second working condition, there is a linear correlation between the total vehicle weight and the maximum torque.

[0078] Figure 23It is a sensitivity relationship diagram of the maximum torque required to drive the first driving wheel 411 under the second working condition with respect to the wheel radius, wheel span, eccentric distance, and the weight of the whole vehicle. Figure 24 It is a sensitivity relationship diagram of the maximum torque required to drive the second driving wheel 412 under the second working condition with respect to the wheel radius, wheel span, eccentric distance, and the weight of the whole vehicle. Sensitivity refers to the change in the maximum torque caused by a unit change in the independent variable, and the independent variables include the wheel radius, wheel span, eccentric distance, and the weight of the whole vehicle. As Figure 23 and Figure 24 can be seen, the wheel radius, wheel span, eccentric distance, and the weight of the whole vehicle all have an impact on the maximum torque. That is, under the second working condition, L1, R, L2, and the weight of the whole vehicle all have an impact on the maximum torque required for the traveling motor 42 to drive the first driving wheel 411 and the second driving wheel 412 to travel. At the same time, L1 and R have a greater impact on the maximum torque required for the traveling motor 42 to drive the first driving wheel 411 and the second driving wheel 412 to travel, and L1 has the greatest impact on the maximum torque required for the traveling motor 42 to drive the first driving wheel 411 and the second driving wheel 412 to travel.

[0079] In summary, it can be analyzed that under different working conditions, the distance L1 between the first driving wheel 411 and the second driving wheel 412 and the radius R of the first driving wheel 411 both have a greater impact on the maximum torque required for the traveling motor 42 to drive the first driving wheel 411 and the second driving wheel 412 to travel.

[0080] In some embodiments, as Figure 3 and Figure 4 shown, the ratio of the distance L1 between the first driving wheel 411 and the second driving wheel 412 to the radius R of the first driving wheel 411 ≥ 6.5. In some embodiments, the ratio of the distance L1 between the first driving wheel 411 and the second driving wheel 412 to the radius R of the first driving wheel 411 ≥ 7.

[0081] Table 1

[0082]

[0083] Table 1 shows the comparison of the maximum torques of the first driving wheel 411 and the second driving wheel 412 between a conventional manned lawn mower under the first working condition and the manned lawn mower of the present application with the R value adjusted in different proportions. It can be seen that under the first working condition, when the radius R of the first driving wheel 411 is adjusted, at the same target wheel speed, the maximum torques required to drive the first driving wheel 411 and the second driving wheel 412 to travel both change. When the radius R of the first driving wheel 411 decreases based on the conventional manned lawn mower, the maximum torques required to drive the first driving wheel 411 and the second driving wheel 412 to travel at the same target wheel speed are smaller than those of the conventional manned lawn mower.

[0084] Table 2

[0085]

[0086] Comparison of the maximum torques of the first driving wheel 411 and the second driving wheel 412 of a conventional manned lawn mower and a manned lawn mower with the R value adjusted in different proportions according to the present application under the second working condition shown in Table 2. It can be seen that under the second working condition, when the radius R of the first driving wheel 411 is adjusted, the maximum torques required to drive the first driving wheel 411 and the second driving wheel 412 to travel both change. At the same time, when the radius R of the first driving wheel 411 is reduced based on that of a conventional manned lawn mower, the maximum torques required to drive the first driving wheel 411 and the second driving wheel 412 to travel at the same target wheel speed are reduced compared to those of a conventional manned lawn mower.

[0087] In summary, it can be seen that under different working conditions, when the radius R of the first driving wheel 411 is reduced based on that of a conventional manned lawn mower, the maximum torques required to drive the first driving wheel 411 and the second driving wheel 412 to travel at the same target wheel speed are both reduced. On this basis, as Figure 3 and Figure 4 shown, in some embodiments, the radius R of the first driving wheel 411 ≤ 200 mm. In some embodiments, the radius R of the first driving wheel 411 ≤ 190 mm. In some other embodiments, the radius R of the first driving wheel 411 ≤ 180 mm. In other embodiments, the radius R of the first driving wheel 411 is less than or equal to any value between 180 mm and 200 mm, and no specific limitation is made here. In summary, the maximum torques required to drive the first driving wheel 411 and the second driving wheel 412 to travel at the same target wheel speed are significantly reduced compared to those of a conventional manned lawn mower. Reducing the torque can improve the endurance time, reduce the temperature rise, and improve the ultimate working ability, etc. Therefore, the manned lawn mower can adapt to working conditions with a higher slope and has better ramp operation ability.

[0088] Table 3

[0089]

[0090] Table 3 shows the maximum torques of the first driving wheel and the second driving wheel of a conventional manned lawn mower and a manned lawn mower with the L1 value adjusted in different proportions according to the present application under the first working condition. It can be seen that under the first working condition, when the distance L1 between the first driving wheel 411 and the second driving wheel 412 is adjusted, the maximum torques required to drive the first driving wheel 411 and the second driving wheel 412 to travel at the same target wheel speed both change. At the same time, when the distance L1 between the first driving wheel 411 and the second driving wheel 412 is increased based on that of a conventional manned lawn mower, the maximum torques required to drive the first driving wheel 411 and the second driving wheel 412 to travel at the same target wheel speed are reduced compared to those of a conventional manned lawn mower.

[0091] Table 4

[0092]

[0093] Comparison of the maximum torques of the first driving wheel 411 and the second driving wheel 412 of a conventional manned lawn mower and the manned lawn mower with the L1 value adjusted in different ratios according to the present application under the second working condition shown in Table 4. It can be seen that under the second working condition, when the distance L1 between the first driving wheel 411 and the second driving wheel 412 is adjusted, the maximum torques required to drive the first driving wheel 411 and the second driving wheel 412 to travel at the same target wheel speed both change. At the same time, when the distance L1 between the first driving wheel 411 and the second driving wheel 412 increases on the basis of the conventional manned lawn mower, the maximum torques required to drive the first driving wheel 411 and the second driving wheel 412 to travel at the same target wheel speed are both smaller than those of the conventional manned lawn mower.

[0094] In summary, it can be seen that under different working conditions, when the distance L1 between the first driving wheel 411 and the second driving wheel 412 increases on the basis of the conventional manned lawn mower, the maximum torques required to drive the first driving wheel 411 and the second driving wheel 412 to travel at the same target wheel speed both decrease. On this basis, in some embodiments, as Figure 3 and Figure 4 shown, the distance L1 between the first driving wheel 411 and the second driving wheel 412 ≥ 1200 mm. At this time, the maximum torques required to drive the first driving wheel 411 and the second driving wheel 412 to travel at the same target wheel speed are significantly smaller than those of the conventional manned lawn mower. Reducing the torque can improve the endurance time, reduce the temperature rise, and improve the ultimate working ability, etc. Therefore, the manned lawn mower can adapt to working conditions with a higher slope and has better ramp operation ability.

[0095] In some embodiments, the distance L1 between the first traveling wheel 411 and the second traveling wheel 412 is greater than or equal to any value in the range of 1200 mm - 1300 mm. In some other embodiments, the distance L1 between the first traveling wheel 411 and the second traveling wheel 412 ≥ 1220 mm. In some other embodiments, the distance L1 between the first traveling wheel 411 and the second traveling wheel 412 ≥ 1230 mm. In some other embodiments, the distance L1 between the first traveling wheel 411 and the second traveling wheel 412 ≥ 1240 mm. In some other embodiments, the distance L1 between the first traveling wheel 411 and the second traveling wheel 412 ≥ 1250 mm. In other embodiments, the distance L1 between the first traveling wheel 411 and the second traveling wheel 412 ≥ 1260 mm. In other embodiments, the distance L1 between the first traveling wheel 411 and the second traveling wheel 412 ≥ 1270 mm. In other embodiments, the distance L1 between the first traveling wheel 411 and the second traveling wheel 412 ≥ 1280 mm. In other embodiments, the distance L1 between the first traveling wheel 411 and the second traveling wheel 412 ≥ 1280 mm. In other embodiments, the distance L1 between the first traveling wheel 411 and the second traveling wheel 412 ≥ 1290 mm. In other embodiments, the distance L1 between the first traveling wheel 411 and the second traveling wheel 412 ≥ 1300 mm.

[0096] Table V

[0097]

[0098] As shown in Table V, comparison of the maximum torques of the first traveling wheel 411 and the second traveling wheel 412 of a conventional manned lawn mower and a manned lawn mower with the L2 value adjusted in different ratios according to the present application under the first working condition. It can be seen that under the first working condition, when the distance L2 from the midpoint d of the line connecting the axes of the first traveling wheel 411 and the second traveling wheel 412 to the center of gravity G of the manned lawn mower is adjusted, the maximum torques required to drive the first traveling wheel 411 and the second traveling wheel 412 to travel at the same target wheel speed both change. At the same time, when the distance L2 from the midpoint d of the line connecting the axes of the first traveling wheel 411 and the second traveling wheel 412 to the center of gravity G of the manned lawn mower is reduced based on the conventional manned lawn mower, the maximum torques required to drive the first traveling wheel 411 and the second traveling wheel 412 to travel at the same target wheel speed are reduced compared to the conventional manned lawn mower.

[0099] Table VI

[0100]

[0101] Comparison of the maximum torques of the first driving wheel 411 and the second driving wheel 412 of a conventional manned lawn mower and a manned lawn mower with adjusted L2 values in different ratios according to the present application under the second working condition as shown in Table VI. It can be seen that under the second working condition, when the distance L2 from the midpoint d of the line connecting the axes of the first driving wheel 411 and the second driving wheel 412 to the center of gravity G of the manned lawn mower is adjusted, the maximum torques required to drive the first driving wheel 411 and the second driving wheel 412 to travel both change. At the same time, when the distance L2 from the midpoint d of the line connecting the axes of the first driving wheel 411 and the second driving wheel 412 to the center of gravity G of the manned lawn mower is reduced based on that of the conventional manned lawn mower, the maximum torques required to drive the first driving wheel 411 and the second driving wheel 412 to travel at the same target wheel speed are reduced compared to the conventional manned lawn mower.

[0102] In summary, it can be seen that under different working conditions, when the distance L2 from the midpoint d of the line connecting the axes of the first driving wheel 411 and the second driving wheel 412 to the center of gravity G of the manned lawn mower is reduced based on that of the conventional manned lawn mower, the maximum torques required to drive the first driving wheel 411 and the second driving wheel 412 to travel are reduced. On this basis, as Figure 3 and Figure 4 shown, the distance L2 from the midpoint d of the line connecting the axes of the first driving wheel 411 and the second driving wheel 412 to the center of gravity G of the manned lawn mower is ≤ 200 mm. The maximum torques required to drive the first driving wheel 411 and the second driving wheel 412 to travel at the same target wheel speed are significantly reduced compared to the conventional manned lawn mower. Reducing the torque can improve the endurance time, reduce the temperature rise, and improve the ultimate working ability, etc. Therefore, the manned lawn mower can adapt to working conditions with a higher slope and has better ability to operate on slopes.

[0103] Table VII

[0104]

[0105] Comparison of the maximum torques required to drive the first driving wheel 411 of a conventional manned lawn mower and a manned lawn mower that satisfies L1 = 1200 mm, R = 200 mm, and L2 = 200 mm as shown in Table VII. It can be seen that in the conventional manned lawn mower, when 10° ≤ slope ≤ 20°, the maximum torques required to drive the first driving wheel 411 are all greater than 70 N·m. For the manned lawn mower proposed in the present application, when satisfying the conditions of L1 = 1200 mm, R = 200 mm, and L2 = 200 mm, when 10° ≤ slope ≤ 20°, at the same target wheel speed, the maximum torques required to drive the first driving wheel 411 to travel are all less than 70 N·m. Thus, the manned lawn mower can adapt to working conditions with a higher slope and has better ability to operate under the ultimate working condition of slope slipping.

[0106] In some embodiments, when traveling on a ramp with a slope of 10° ≤ slope ≤ 20°, at the same target wheel speed, the maximum torque required to drive the first traveling wheel 411 and / or the second traveling wheel 412 for traveling is ≤ 70 N·m. Preferably, when traveling on a ramp with a slope of 10° ≤ slope ≤ 20°, at the same target wheel speed, the maximum torque required to drive the first traveling wheel 411 and / or the second traveling wheel 412 for traveling is ≤ 68 N·m. Preferably, when traveling on a ramp with a slope of 10° ≤ slope ≤ 20°, at the same target wheel speed, the maximum torque required to drive the first traveling wheel 411 and / or the second traveling wheel 412 for traveling is ≤ 65 N·m, so that the manned mower can adapt to working conditions with a higher slope and has better ramp operation ability.

[0107] The advantage of this application is that through analysis, it is found that both the distance L1 between the first traveling wheel and the second traveling wheel and the radius R of the first traveling wheel have an impact on the maximum torque required for the traveling motor to drive the first traveling wheel and the second traveling wheel to travel. When the ratio of the distance L1 between the first traveling wheel and the second traveling wheel to the radius R of the first traveling wheel is ≥ 6, the maximum torque for the traveling motor to drive the first traveling wheel and the second traveling wheel is significantly reduced. Reducing the torque can improve the ultimate working capabilities such as endurance and temperature rise. Therefore, the manned mower can adapt to working conditions with a higher slope and has better operation ability under ramp working conditions.

[0108] The above shows and describes the basic principles, main features, and advantages of this application. Those skilled in the art should understand that the above embodiments do not limit this application in any form. Any technical solutions obtained by using equivalent replacements or equivalent transformations fall within the protection scope of this application.

Claims

1. A manned lawn mower, comprising: Frame; A running wheel set, mounted on the frame; The running wheel set comprises at least a rear running wheel, and the rear running wheel comprises a first running wheel and a second running wheel; A travel motor having a drive shaft for driving the travel wheel set; Mowing elements; Powered by a mowing motor; A power supply assembly, comprising at least one battery pack, for supplying power to the travel motor and / or the mowing motor; It is characterized in that A ratio of a distance L1 between the first running wheel and the second running wheel to a radius R of the first running wheel is ≥6.

2. The manned lawn mower according to claim 1, wherein: A distance L1 between the first running wheel and the second running wheel is ≥1200 mm.

3. The manned lawn mower according to claim 2, characterized in that: A distance L1 between the first running wheel and the second running wheel is ≥1250 mm.

4. The manned lawn mower according to claim 1, characterized in that: The radius R of the first running wheel and the second running wheel is ≤200 mm.

5. The manned lawn mower according to claim 1, characterized in that: The radius R of the first running wheel and the second running wheel is ≤180 mm.

6. The manned lawn mower according to claim 1, characterized in that: The total energy of the power supply component is greater than or equal to 2 kW·h and less than or equal to 10 kW·h.

7. The manned lawn mower according to claim 1, characterized in that: A distance L2 from a midpoint of a line connecting the axis of the first running wheel and the axis of the second running wheel to the center of gravity of the manned lawn mower is ≤200 mm.

8. The manned lawn mower according to claim 1, characterized in that: When traveling on a slope with a slope of 10°≤slope≤20°, the maximum torque required for the first running wheel and / or the second running wheel to travel is ≤70 N·m.

9. The manned lawn mower according to claim 1, characterized in that: At least one of the battery packs is detachably mounted on the vehicle frame.

10. The manned lawn mower according to claim 1, characterized in that: The travel motor includes at least a first travel motor and a second travel motor, wherein the first travel motor is used to drive the first travel wheel, and the second travel motor is used to drive the second travel wheel.

11. The manned lawn mower according to claim 1, characterized in that: The manned lawn mower is a riding lawn mower or a standing lawn mower.

12. The manned lawn mower according to claim 1, characterized in that: The energy of at least one battery pack of the power supply assembly is greater than or equal to 100W·h and less than or equal to 2kW·h.

13. A manned lawn mower, comprising: Frame; A running wheel set, mounted on the frame; The running wheel set comprises at least a rear running wheel, and the rear running wheel comprises a first running wheel and a second running wheel; A travel motor having a drive shaft for driving the travel wheel set; Mowing elements; Powered by a mowing motor; A power supply assembly, comprising at least one battery pack, for supplying power to the travel motor and / or the mowing motor; It is characterized in that A distance L1 between the first running wheel and the second running wheel is ≥1200 mm.

14. The manned lawn mower according to claim 13, characterized in that: A distance L1 between the first running wheel and the second running wheel is ≥1250 mm.

15. The manned lawn mower according to claim 13, characterized in that: The radius R of the first running wheel and the second running wheel is ≤200 mm.

16. An outdoor walking device comprising: Frame; A running wheel set, mounted on the frame; The running wheel set comprises at least a rear running wheel, and the rear running wheel comprises a first running wheel and a second running wheel; A travel motor having a drive shaft for driving the travel wheel set; Mowing elements; Powered by a mowing motor; A power supply assembly, comprising at least one battery pack, for supplying power to the travel motor and / or the mowing motor; It is characterized in that A ratio of a distance L1 between the first running wheel and the second running wheel to a radius R of the first running wheel is ≥6.

17. The outdoor walking equipment according to claim 16, characterized in that: The outdoor walking equipment is a manned snow sweeper, a manned lawn mower or an all-terrain vehicle.

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