Multifunctional operation vehicle, riding mower, and operation motor

Abstract

The present invention relates to a multifunctional operation vehicle and a riding mower. The multifunctional operation vehicle comprises a frame, a traveling mechanism, an operation mechanism and other components, wherein the operation mechanism and the traveling mechanism are both arranged on the frame, the traveling mechanism can travel on the ground under control, and the operation mechanism is used for achieving a cutting effect on vegetation. An operation motor comprises a first air inlet allowing external air to enter the interior of the motor, an air inlet channel having at least one forced deflection section is formed at the first air inlet, and the forced deflection section is configured to generate a deflection of the flow direction of cooling air by an included angle α with the direction of gravity. During air flowing, due to the difference in inertia between air and foreign matters such as water droplets, the foreign matters such as water droplets are separated from the air, the foreign matters such as water droplets remain in the air inlet channel, and only the air without the foreign matters such as water droplets continues to enter the interior of the motor.

Description

A multi-functional work vehicle, a ride-on lawnmower and a work motor Technical Field

[0001] This invention relates to the field of outdoor work vehicles, and in particular to a multi-functional work vehicle, a ride-on lawnmower, and a work motor. Background Technology

[0002] Outdoor work vehicles generally refer to vehicles used for landscaping and other outdoor operations, mainly including vehicles used for mowing and maintaining lawns.

[0003] Lawn mowers are among the fastest-growing types of work vehicles in recent years. They are equipped with a mower head, inside which blades cut and maintain the grass on the ground. The mower head typically uses an electric motor to drive the blades, generating a significant amount of heat during operation. Current technology uses external airflow to enhance motor cooling; however, this airflow often carries water droplets and other impurities that can affect the motor's normal operation, leading to a reduction in its lifespan.

[0004] Therefore, it is indeed necessary to provide an improved multi-functional work vehicle, a ride-on lawnmower, and a work motor to overcome the shortcomings of the existing technology. Summary of the Invention

[0005] In view of the shortcomings of the prior art, the purpose of this invention is to provide a multi-functional work vehicle, a ride-on lawnmower and a work motor that prevents water droplets or other debris from entering the motor.

[0006] The technical solution adopted by this invention to solve the problems of the prior art is:

[0007] A multi-functional work vehicle, comprising:

[0008] Frame;

[0009] A driving mechanism, connected to the frame, can controllably drive the multi-functional work vehicle to travel on the ground;

[0010] A working mechanism, connected to the vehicle frame, is used for ground maintenance work; the working mechanism includes a working motor and working elements that rotate about the output axis of the working motor; the working motor includes:

[0011] The first air inlet is located in the housing of the working motor;

[0012] An air outlet is located in the housing of the working motor;

[0013] An air intake channel with at least one forced deflection section is formed at the first air intake. The forced deflection section is configured to cause the flow direction of the cooling air to deflect at an angle α with the direction of gravity, so as to use the difference in inertia to separate the gas from foreign matter mixed in the gas, wherein 90°<α≤180°.

[0014] The present invention also discloses a multi-functional work vehicle, comprising:

[0015] Frame;

[0016] The working mechanism, connected to the vehicle frame, is used to mow the grass.

[0017] A driving mechanism, connected to the frame, can controllably drive the multi-functional work vehicle to travel on the ground;

[0018] The operating mechanism includes:

[0019] A cutting table, including a through hole, is connected to the vehicle frame;

[0020] A mowing motor, disposed on the mower table, the mowing motor at least partially penetrating the through-hole and connected to a cutting blade; the mowing motor includes:

[0021] The first air inlet is located in the housing of the lawnmower motor;

[0022] The second air inlet connects to the internal space of the motor, and at least a portion of the rotor and / or the stator of the lawnmower motor is located in the internal space;

[0023] An air outlet is located in the housing of the motor;

[0024] An air intake channel containing at least two continuous airflow deflection sections is formed between the first air intake and the second air intake to separate and block foreign objects from entering the internal space.

[0025] The present invention also discloses a ride-on lawnmower, including a frame, a running gear, and:

[0026] Seats, configured on the vehicle frame, are used to support the user;

[0027] The working mechanism, connected to the vehicle frame, is used to mow the grass; the working mechanism includes:

[0028] A cutting table, including a through hole, is connected to the vehicle frame;

[0029] A mowing motor, disposed on the mower table, the mowing motor at least partially penetrating the through-hole and connected to a cutting blade; the mowing motor includes:

[0030] The first air inlet is located in the housing of the lawnmower motor;

[0031] The second air inlet connects to the internal space of the motor, and at least a portion of the rotor and / or the stator of the lawnmower motor is located in the internal space;

[0032] An air outlet is located in the housing of the motor;

[0033] An air intake channel with at least one forced deflection section is formed between the first air intake and the second air intake. The forced deflection section is configured to cause the flow direction of the cooling air flowing into the motor to deflect at an angle greater than 90 degrees with the direction of gravity, so as to use the difference in inertia to separate the gas from foreign matter mixed in the gas.

[0034] The present invention also discloses a working motor for use in multi-functional work vehicles, the working motor comprising:

[0035] The first air inlet is located in the housing of the working motor;

[0036] The second air inlet connects to the internal space of the working motor, and at least a portion of the rotor and / or the stator of the working motor is located in the internal space;

[0037] An air outlet is located in the housing of the working motor;

[0038] An air intake channel with at least one forced deflection section is formed between the first air intake and the second air intake. The forced deflection section is configured to cause the flow direction of the cooling air flowing into the motor to deflect at an angle α with the direction of gravity, so as to use the difference in inertia to separate the gas from foreign matter mixed in the gas, wherein 90°<α≤180°.

[0039] The present invention also discloses a multi-functional work vehicle, comprising:

[0040] Frame;

[0041] A driving mechanism, connected to the frame, is used to drive the multi-functional work vehicle.

[0042] The working mechanism, connected to the vehicle frame, is used to perform maintenance work on the ground;

[0043] A control system for controlling the driving mechanism and / or the working mechanism;

[0044] The driving mechanism and / or the working mechanism include a motor, the motor comprising a first housing and a second housing that are mated together;

[0045] The first housing is provided with a receiving groove and a connecting frame that is at least partially received within the receiving groove;

[0046] The connecting frame and the first housing together define an annular limiting structure;

[0047] The limiting structure is provided with a sealing structure for sealing the joint between the first housing and the second housing.

[0048] The present invention also discloses a multi-functional work vehicle, comprising:

[0049] Frame;

[0050] A driving mechanism, connected to the frame, is used to drive the multi-functional work vehicle.

[0051] The working mechanism, connected to the vehicle frame, is used to perform maintenance work on the ground;

[0052] A control system for controlling the driving mechanism and / or the working mechanism;

[0053] The working mechanism includes a working motor, and the working motor includes a first housing and a second housing that are connected to each other;

[0054] The first housing is provided with a receiving groove and a connecting frame that is at least partially received within the receiving groove;

[0055] The connecting frame and the first housing together define an annular limiting structure;

[0056] The limiting structure is provided with a sealing structure for sealing the joint between the first housing and the second housing.

[0057] The present invention also discloses a ride-on lawnmower, comprising:

[0058] Frame;

[0059] Seats, configured on the vehicle frame, are used to support the user;

[0060] A driving mechanism, connected to the frame, is used to drive the multi-functional work vehicle.

[0061] A mowing mechanism, connected to the vehicle frame, is used to perform mowing operations on the ground;

[0062] A control system for controlling the driving mechanism and / or the mowing mechanism;

[0063] The mowing mechanism includes a mower and a mowing motor that passes through the mower. The mowing motor includes a first housing and a second housing that are connected to each other.

[0064] The first housing is provided with a receiving groove and a connecting frame that is at least partially received within the receiving groove;

[0065] The connecting frame and the first housing together define an annular limiting structure;

[0066] The limiting structure is provided with a sealing structure for sealing the joint between the first housing and the second housing.

[0067] Compared with the prior art, the present invention has at least the following beneficial effects:

[0068] In this application, the working motor is provided with an air intake channel having a forced deflection section, and the forced deflection section is configured to cause the flow direction of the cooling air flowing into the motor to form an angle greater than 90° and less than or equal to 180° with the direction of gravity. During this process, the inertia of air and impurities such as water droplets is different, causing the water droplets and other impurities to separate from the air. The water droplets and other impurities remain in the air intake channel, and only air without water droplets and other foreign objects continues to enter the motor. Attached Figure Description

[0069] Figure 1 is a perspective view of one embodiment of the outdoor work vehicle of this application;

[0070] Figure 2 is a schematic diagram of the working mechanism of the outdoor work vehicle in this application;

[0071] Figures 3 and 4 are axonometric views of the lawnmower motor in this application;

[0072] Figure 5 is a structural schematic diagram of the rotor assembly in this application;

[0073] Figure 6 is a cross-sectional schematic diagram of the lawnmower motor in this application;

[0074] Figures 7 and 8 are schematic diagrams of the rotor portion in another embodiment of this application;

[0075] Figure 9 is an isometric view of another part of the lawnmower motor in this application;

[0076] Figure 10 is a partial cross-sectional schematic diagram of a lawnmower motor in one embodiment of this application;

[0077] Figure 11 is a partial cross-sectional schematic diagram of a lawnmower motor in another embodiment of this application;

[0078] Figure 12 is an isometric view of a lawnmower motor in one embodiment of this application;

[0079] Figure 13 is a cross-sectional schematic diagram of the lawnmower motor with an air intake channel in this application;

[0080] Figure 14 is a partially enlarged schematic diagram of Figure 13;

[0081] Figure 15 is another partial cross-sectional schematic diagram of a lawnmower motor in one embodiment of this application;

[0082] Figure 16 is a schematic diagram of the lower shell structure in this application;

[0083] Figure 17 is a top view of the lower shell in this application;

[0084] Figure 18 is a schematic diagram of the structure of the protective cover in this application;

[0085] Figure 19 is a structural schematic diagram of the protective cover for assembling the filter section in this application;

[0086] Figures 20 and 21 are schematic diagrams of the filter section in this application;

[0087] Figure 22 is a top view of the filter section in this application;

[0088] Figure 23 is a bottom view of the protective cover in this application;

[0089] Figures 24A and 24B are schematic diagrams of the frame and cutting platform in this application;

[0090] Figure 25 is an axonometric view of the working motor in one embodiment of this application;

[0091] Figure 26 is an axonometric view of the working motor in another embodiment of this application;

[0092] Figure 27 is an axonometric view of the working motor in another embodiment of this application;

[0093] Figure 28 is a side view of the working motor in another embodiment of this application;

[0094] Figure 29 is an axonometric view of the working motor in another embodiment of this application;

[0095] Figure 30 is a schematic diagram of the working mechanism of the outdoor work vehicle in this application;

[0096] Figure 31 is an axonometric view of the lawnmower motor in this application;

[0097] Figure 32 is an exploded schematic diagram of a lawnmower motor in one embodiment of this application;

[0098] Figure 33 is a structural schematic diagram of the first shell portion in this application;

[0099] Figure 34 is a cross-sectional schematic diagram of a lawnmower motor in one embodiment of this application;

[0100] Figure 34A is a partially enlarged schematic diagram of Figure 34;

[0101] Figure 35 is a structural schematic diagram of the rotor assembly in this application;

[0102] Figures 36 and 37 are schematic diagrams of the connecting frame in this application;

[0103] Figure 38 is a structural schematic diagram of the second shell portion in this application;

[0104] Figure 39 is a schematic diagram of the structure of the first shell in this application;

[0105] Figure 40 is a top view of the first housing in this application;

[0106] Figure 41 is a top view of the driving mechanism portion of this application;

[0107] Figures 42 and 43 are schematic diagrams of the drive motor part in this application;

[0108] Figure 44 is a partial schematic diagram of the drive motor in this application;

[0109] Figure 45 is a schematic diagram of the sealing cap in this application;

[0110] Figure 46 is a cross-sectional schematic diagram of the drive motor in this application;

[0111] Figure 47 is a partially enlarged schematic diagram of Figure 46;

[0112] Figures 48 and 49 are schematic diagrams of the working mechanism of the outdoor work vehicle in this application;

[0113] Figure 50 is a schematic diagram of the structure of a cutting table according to an embodiment of this application;

[0114] Figures 51 and 52 are schematic diagrams of the structure of a lawnmower motor according to an embodiment of this application;

[0115] Figure 53 is a structural schematic diagram of a lawnmower motor according to another embodiment of this application;

[0116] Figure 54 is a schematic diagram of the structure of a cutting table according to an embodiment of this application;

[0117] Figure 55 is a cross-sectional schematic diagram of a lawnmower motor according to an embodiment of this application;

[0118] Figure 56 is a partial cross-sectional schematic diagram of a lawnmower motor and mower table according to an embodiment of this application;

[0119] Figure 57 is a partially enlarged schematic diagram of a lawnmower motor and mower table according to an embodiment of this application;

[0120] Figure 58 is a schematic diagram of the flushing channel portion of the mowing motor and mower table according to an embodiment of this application. Detailed Implementation

[0121] The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit this specification. For example, terms such as "upper," "lower," "front," and "rear," which indicate orientation or positional relationship, are based solely on the orientation or positional relationship shown in the accompanying drawings and are used only for the purpose of simplifying the description of this specification. They do not indicate or imply that the device / component referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as limiting this specification.

[0122] A multi-functional work vehicle is disclosed in some embodiments of this application. Referring to Figure 1, it includes a frame 1, a working mechanism, and a traveling mechanism. The frame 1 extends along a first direction, which is also the vehicle's forward direction. The working mechanism is disposed on the frame 1 and is used to perform outdoor work to produce working effects. The traveling mechanism is connected to the frame 1 and can be controlled to travel on the ground.

[0123] In some optional embodiments, the multi-functional work vehicle further includes a power system for supplying power to the work mechanism. Further, at least a portion of the power system is detachably connected to the frame 1. The power system includes a plurality of battery cells detachably connected to the frame 1. The plurality of battery cells can be at least one of a first-specification battery pack and a second-specification battery pack. The differences in specifications between the first-specification battery pack and the second-specification battery pack include, but are not limited to, differences in battery pack capacity, voltage, battery internal resistance, weight, size, energy density, cell type, charge information, and battery health status information.

[0124] In one alternative embodiment, the power system further includes a battery compartment 3, a battery management system, etc. The battery compartment 3 is used to house the battery pack, and the battery management system is used to manage the power supply of the battery pack to various components of the vehicle.

[0125] In one alternative embodiment, the battery compartment 3 and / or battery management system are configured on the frame 1, and the battery pack is detachably configured in the battery compartment 3 to enable the battery pack to be removed and replaced, and the removed battery pack can be used for the other electric garden tools mentioned above; and the design of the detachable battery pack means that when the vehicle's power is low or depleted, there is no need to wait for a long charging time, and the vehicle can be quickly restored to a working state simply by replacing the battery pack.

[0126] In one alternative embodiment, the battery compartment 3 is detachably configured on the frame 1, and the battery is housed within the battery compartment 3, meaning that the battery compartment 3 can be completely separated from or combined with the frame 1.

[0127] In some optional embodiments, the working mechanism of the multi-functional work vehicle is configured as a mowing component for mowing the ground. That is, the multi-functional work vehicle in this embodiment is a lawnmower. The mowing component includes a cutter head 4 connected to the frame 1. The cutter head 4 is equipped with a motor and a cutter blade 6 mounted on the motor. The motor drives the cutter blade 6 to rotate at high speed, producing a cutting effect on the ground vegetation, especially cutting the grass. The cutter head 4 shown in the figure is equipped with two motors, which drive the cutter blade 6 to rotate and achieve mowing. A grass discharge port is provided on the side of the cutter head 4, and a grass discharge cover 8 is provided at the grass discharge port.

[0128] In some optional embodiments, the driving mechanism includes an electric motor connected to the frame 1 and controlled to output power to the drive wheel 7 and rotate the drive wheel 7.

[0129] In some optional embodiments, the lawnmower has two types of motors: the motor located at the cutter head 4 in the working mechanism is the mowing motor 5; and the motor that outputs power to the drive wheel 7 in the traveling mechanism is the traveling motor.

[0130] In one embodiment of the present invention, the mower 4 is surrounded by a mowing space for accommodating at least a portion of the cutter 6; the mower 4 includes a through hole, through which the mowing motor 5 passes from top to bottom and extends into the mowing space; the portion of the mowing motor 5 located in the mowing space is fixed with the cutter 6, that is, the output end of the mowing motor 5 is fixed with the cutter 6, for driving the cutter 6 to rotate to achieve the mowing operation.

[0131] In some embodiments of the present invention, the rated power of the lawnmower motor 5 is greater than or equal to 1.5KW. In other embodiments of the present invention, to meet the needs of extreme working conditions, the rated power of the lawnmower motor 5 is greater than or equal to 2KW. Especially in land clearing conditions, the area to be cleared not only contains weeds but also some shrubs. These shrubs may contain woody herbaceous plants that have become lignified due to years of neglect, and even some woody plants that need to be cut down. Areas that have not been cleared for years may also contain stones and other debris. This poses a significant challenge to the heat dissipation performance of the lawnmower motor 5.

[0132] In existing technologies, the operating mechanism relies on airflow across the motor surface for heat dissipation. This requires the motor to first conduct heat to its surface and then dissipate that heat outwards. However, the heat inside the motor accumulates near the stator coils, which are separated from the motor casing by a certain gap. Especially in external rotor motors capable of generating higher operating torque, the rotor itself forms an outer layer of the stator coils, making it even more difficult for heat to be conducted to the motor casing. This results in poor overall heat dissipation, leading to excessively high temperatures during motor operation.

[0133] In some embodiments of the present invention, in order to improve the heat dissipation performance of the motor of the working mechanism, a heat dissipation channel penetrating its interior is provided in the lawnmower motor 5. The heat dissipation channel penetrating the interior of the motor forms a heat dissipation airflow that is in direct contact with the stator coil, thereby enabling the heat generated by the motor stator coil to be quickly dissipated to the outside.

[0134] Referring to Figure 3, the upper part of the motor is equipped with an air inlet. The air entering the motor through the air inlet flows axially, comes into contact with the stator coils, and absorbs the heat from the stator coils. It then continues to flow axially until it exits the motor. This completes the heat dissipation of the motor.

[0135] In some optional embodiments, referring to Figures 3 and 4, an air outlet is provided at the bottom of the motor to create a stable airflow channel. As described above, the air inside the motor can flow axially through the stator coils and then exit the motor through the air outlet.

[0136] In some optional embodiments, the motor is configured as an external rotor motor, meaning that a portion of the rotor assembly 56 is located on the outer periphery of the stator coils. This outer periphery portion includes magnets that generate magnetic force with the stator coils when energized, thereby driving the rotor to rotate. The rotor assembly 56 also includes a shaft located on the inner periphery of the stator coils. The shaft and the magnet portion are connected via a rotor housing to ensure synchronous rotation, transmitting the rotation of the magnets outward via the rotor shaft 566 to the outside. The rotor assembly 56 includes a rotor housing that extends at least partially radially along the motor to connect the magnets and the rotor shaft 566.

[0137] In some of the alternative embodiments, at least a portion of the rotor housing is generally barrel-shaped, and one end of the rotor housing extends radially toward the center until it is connected to the output shaft of the mowing motor 5. For ease of description, the end of the rotor housing that is connected to the output shaft of the mowing motor 5 is the connecting end; the other end of the rotor housing is the open end.

[0138] Referring to Figure 5, a schematic diagram of the rotor assembly 56 is shown. The connecting end of the rotor housing extends radially to form a housing end 561, and the outer ring of the housing end 561 extends axially to form a housing ring 562. That is, the housing end 561 is configured to extend radially and connect to the motor shaft; the housing ring 562 is used to fix the magnet. In some optional embodiments, the housing ring 562 is provided with limiting teeth 563, and the generally block-shaped magnet is engaged with the limiting teeth 563 to prevent relative rotation between the magnet and the rotor housing. In some more specific embodiments, the limiting teeth 563 are disposed on the inner wall of the housing ring 562, the magnet is engaged with the limiting teeth 563, and the magnet and / or the limiting teeth 563 are fixed to the housing ring 562 with adhesive. In some more specific embodiments, the adhesive used to adhere the magnet to the rotor housing is an anaerobic adhesive.

[0139] In some optional embodiments, the connecting end of the rotor housing is a closed structure, that is, the connecting end of the rotor housing is a complete plate structure, and materials inside and outside the rotor housing cannot directly pass through the connecting end. In this embodiment, air inside and outside the rotor housing can only enter and exit through the open end to carry away the heat of the stator coils. The air entering the motor from the air inlet at the top of the motor flows along the outer wall of the rotor housing. When the cooling air flows to the open end of the rotor housing, it can carry away the hot air at the corresponding location, thereby producing a heat dissipation effect on the motor.

[0140] Referring to Figure 5, in one of the optional embodiments, the connecting end of the rotor housing has a hollow structure, that is, the housing end 561 of the rotor housing is provided with a breathable housing hole 565, through which substances inside and outside the rotor housing can pass. In particular, the stator coils inside the rotor housing generate significant heat during operation, which can flow with the air inside and outside the rotor housing, thereby allowing the hot air around the stator coils to flow to the outside of the rotor housing; thus, the air heated by the stator coils is directly discharged to the outside.

[0141] As described above, the rotor housing has a radially extending housing end 561, which inevitably covers one axial side of the stator coil. To prevent the housing end 561 from obstructing the flow of cooling air between the stator coil and the cooling airflow, in some optional embodiments, a housing hole 565 is provided in the rotor housing, allowing the cooling airflow to pass through the rotor housing axially. Referring to Figure 6, a cross-sectional schematic diagram of the motor is shown. The housing end 561 is located on the side of the stator core near the motor air inlet 53, and the housing end 561 is provided with a housing hole 565. Air entering the motor through the air inlet 53 passes through the housing hole 565 of the housing end 561 and comes into contact with the stator coil, thereby quickly absorbing the heat of the stator coil.

[0142] In another optional embodiment, the housing end 561 is located on the side of the stator core away from the motor air inlet, and the air entering the motor through the motor air inlet first contacts the stator coil and quickly absorbs the heat of the stator coil, and then flows axially through the housing hole 565 of the housing end 561.

[0143] In some optional embodiments, referring to Figure 6, the housing hole 565 at the housing end 561 is approximately located on the axial side of the motor air inlet, that is, the axial projections of the housing hole 565 at the housing end 561 and the motor air inlet at least partially overlap. This allows air to flow axially between the two, ensuring higher air permeability.

[0144] In some optional embodiments, referring to Figure 6, the housing hole 565 at the housing end 561 is approximately located on the axial side of the stator coil, meaning that the housing hole 565 at the housing end 561 and the axial projection of the stator coil at least partially coincide. This allows air to flow axially between them, ensuring higher air permeability. In some optional embodiments, the stator assembly includes a plurality of radially extending stator teeth, on which the stator coil is wound. Adjacent stator teeth still have a gap after the stator coil is wound, which allows cooling gas to flow.

[0145] In some optional embodiments, the housing hole 565 at the housing end 561 at least partially overlaps with the axial projection of the gap between two adjacent stator teeth, reducing the resistance of the stator teeth to the cooling airflow, so as to ensure that the air between them can flow more smoothly in the axial direction.

[0146] In at least some embodiments of this specification, the lawnmower motor 5 is configured as a brushless motor, in which the rotor is always rotating during operation. In some optional embodiments, the axial projection of the housing hole 565 at the end of the housing 561 and the gap between two adjacent stator teeth always at least partially overlaps. That is, although the end of the rotor housing remains rotating during motor operation, at any rotation angle, the housing hole 565 on it partially overlaps the axial projection of the gap between at least two adjacent stator teeth. This ensures that at any instant during motor operation, air can flow axially between the housing hole 565 at the end of the housing 561 and the gap between the stator teeth. At this position, the airflow resistance is smaller. In this position, the airflow resistance at the through hole and stator teeth, where the above-mentioned overlapping position relationship is not present, is slightly larger. However, the position with lower airflow resistance can have a larger flow velocity, that is, in any state of motor operation, the overall cooling airflow of the motor will not have too significant an airflow change, ensuring that the overall heat dissipation of the motor is more uniform.

[0147] In at least some embodiments of this specification, stator teeth are uniformly arranged circumferentially on the outer ring of the rotating shaft; housing holes 565 at the housing end 561 are also uniformly arranged circumferentially. In some optional embodiments, the number of stator teeth is a multiple of three, and the number of housing holes 565 at the housing end 561 is not a multiple of three. That is, in some optional embodiments, the number of stator teeth and the number of housing holes 565 are not in a multiple relationship. This avoids the situation described above where there is no through hole axially coinciding with the gap between any two adjacent stator teeth.

[0148] In some optional embodiments, the stator teeth are configured to be 12, and the housing holes 565 at the housing end 561 are configured to be five or seven.

[0149] In some optional embodiments, the stator teeth are configured to be 15, and the housing holes 565 at the housing end 561 are configured to be four or six.

[0150] In some optional embodiments, the stator teeth are configured to be 18, and the housing holes 565 at the housing end 561 are configured to be five, seven, or eight.

[0151] In some optional embodiments, the housing end 561 of the rotor core is provided with a plurality of housing holes 565 for airflow, and the airflow resistance can be reduced by increasing the area of ​​the through holes, thereby increasing the airflow speed. Referring to Figure 7, for this reason, in some optional embodiments, the housing end 561 of the rotor housing is configured to have an inner ring, an outer ring, and a connecting rod structure connecting the inner and outer rings. Specifically, the inner ring is connected to the shaft of the lawnmower motor 5, and the outer ring is connected to the housing ring 562. The connecting rod serves as a structural component connecting the inner and outer rings to ensure their synchronous movement, that is, the outer and inner rings of the rotor housing are connected by the connecting rod and transmit torque. The housing holes 565 formed between adjacent connecting rods serve as the aforementioned through holes for air to flow axially.

[0152] In some optional embodiments, at least some of the connecting rods are configured as inclined plates. In particular, the connecting rods have two end faces, at least one of which is not perpendicular to the motor axis. These connecting rods rotate during the operation of the lawnmower motor 5, causing disturbance to the surrounding air, thereby accelerating the airflow inside and outside the rotor housing, which in turn speeds up the outward conduction of heat from the stator coils, thus facilitating motor heat dissipation.

[0153] Furthermore, in some optional embodiments, at least some of the connecting rods are configured as inclined plates. Specifically, the connecting rods have two end faces, at least one of which is not perpendicular to the motor axis. These connecting rods rotate during the operation of the lawnmower motor 5, causing disturbance to the surrounding air, thereby accelerating the airflow inside and outside the rotor housing. This speeds up the outward conduction of heat from the stator coils, which is beneficial for motor heat dissipation. In other words, the connecting rods, as part of the rotor housing structure, achieve the technical effect of an axial fan.

[0154] In the embodiment shown in Figure 8, a portion of the rotor housing is formed with an axial fan capable of generating axial airflow during rotation. In another embodiment of this application, the axial fan can also be a separate component, but the axial fan is fixed to the rotor housing or rotor shaft. That is, the axial fan is not integrally formed with the rotor housing.

[0155] In some optional embodiments, the lawnmower motor 5 only bears a high load during unidirectional rotation, meaning that the main operating condition of the lawnmower motor 5 is unidirectional rotation. The connecting end of the rotor housing includes an inner ring portion that is interference-fitted with the output shaft. One end of the connecting rod is connected to the inner ring portion, and the other end of the connecting rod is connected to the outer ring portion. Referring to Figure 8, in this embodiment, the rotor housing rotates along the direction of the curved arrow shown in the figure. At least one of the connecting rods has a point at its contact position with the inner ring portion, and this point is the extreme position point of the contact position between the connecting rod and the inner ring portion along the circumference of the inner ring portion in the forward rotation direction. This point is defined as point O. A straight line a is drawn radially along the output shaft through point O, and the straight line a intersects the outer ring portion at point K. At least partially, the connection point between the corresponding connecting rod and the outer ring portion is located on the counter-rotation side of point K. That is, when looking from one end of the outer ring portion of the connecting rod towards one end of the inner ring portion, the connecting rod extends in the forward rotation direction.

[0156] Referring to Figure 8, when the lawnmower motor 5 is working, the stator coils generate a thrust on the magnets, causing the rotor housing to rotate clockwise. The magnets on the rotor housing are fixed to its barrel-shaped structure. During rotation, the torque is transmitted to the rotor shaft 566 of the lawnmower motor 5 through the aforementioned connecting rod, ultimately achieving the effect of outputting torque to the outside. The aforementioned arrangement, where the connecting rod is tilted towards the direction of rotation when viewed from the outer ring end towards the inner ring, means that the force exerted by the barrel-shaped structure of the rotor housing on the connecting rod during rotation is primarily compressive stress. The force between the connecting rod and the inner ring is also compressive stress. In this embodiment, the rotor housing is made of low-carbon steel. Low-carbon steel has significantly higher compressive strength than tensile strength; therefore, the arrangement of the connecting rod in this embodiment allows it to withstand greater stress, meaning the connecting rod can support the lawnmower motor 5 to output greater torque, thus improving the maximum mechanical performance supported by the mechanical structure of the lawnmower motor 5.

[0157] It should be noted that the rotor housing in this embodiment is made of carbon steel with a carbon content of less than 0.25%, which has low hardness and is easy to process and form. In another optional embodiment, the rotor housing is made of 20# steel. In other optional embodiments, the rotor housing may also be made of 15# steel, 25# steel, or other carbon steels with similar carbon content.

[0158] In some embodiments of this specification, the connecting rod has an inclined surface that creates a pressure difference between its two axial ends when rotated, thereby driving airflow. Regardless of whether the motor has vents connecting the inside and outside, the connecting rod allows heat from the stator core to dissipate more quickly throughout the motor, facilitating heat dissipation and preventing overheating that could cause malfunctions.

[0159] In some more specific embodiments, the upper part of the motor is provided with an air inlet, and the air outlet 54 of the motor is provided on the lower wall of the motor housing. In this case, the cooling airflow entering the motor flows axially through the stator coil and then continues to flow axially to exit through the exhaust port without producing a significant change in direction.

[0160] In some more specific embodiments, an air inlet is provided on the upper part of the motor, and an exhaust port (not shown) is provided on the circumferential sidewall of the lower side of the motor housing. In this case, the cooling airflow entering the motor flows axially through the stator coil, deflects approximately radially, and then flows out of the motor through the exhaust port on the circumferential sidewall of the motor housing.

[0161] Referring to Figures 6 and 9, which are cross-sectional and isometric views of the lawnmower motor 5 in some embodiments of this specification, the lower housing 52 in the figures has the aforementioned vent 54 on its end face. The end face of the lawnmower motor 5 with the vent is located within the mowing space. The grass clippings cut by the cutter 6 scatter throughout the mowing space, but in this embodiment, the vent faces the drive shaft, making it difficult for grass clippings to directly enter the interior of the lawnmower motor 5.

[0162] Referring to Figures 3, 6, and 9, the outer casing of the lawnmower motor 5 includes an upper casing 51 and a lower casing 52. The rotor shaft 566 passes through the lower casing 52 and connects to the cutter 6. A retaining ring 521 is also provided on the end face of the lower casing 52. The retaining ring 521 protrudes from the edge of the exhaust port along the axial direction of the drive shaft. This means that air flowing outwards along the direction of the exhaust port will be blocked and redirected by the retaining ring 521. Correspondingly, external air or grass clippings cannot directly enter the exhaust port because they cannot pass through the retaining ring 521; they must be redirected at the retaining ring 521 before they can enter the exhaust port. The probability of grass clippings and other debris colliding with the retaining ring 521 and rebounding into the exhaust port is extremely low, thereby reducing the possibility of external grass clippings and other debris entering the exhaust port and ensuring the cleanliness of the lawnmower motor 5.

[0163] Referring to Figure 10, which is a partial cross-sectional view of the lawnmower motor 5, in this embodiment, the exhaust port includes an outer wall 541, an inner wall 542, and an opening 543. The outer wall 541 is the sidewall of the exhaust port away from the upper housing 51, the inner wall 542 is the sidewall of the exhaust port closer to the upper housing 51, and the opening 543 is a hole for air flow. In this embodiment, looking along the axial direction of the drive shaft towards the exhaust port, the interior of the lawnmower motor 5 cannot be seen through the opening 543. That is, external air cannot flow directly into the interior of the lawnmower motor 5 along the axial direction of the drive shaft. This reduces the possibility of external debris such as grass clippings entering the exhaust port, thus ensuring the cleanliness of the interior of the lawnmower motor 5.

[0164] Referring to Figure 10, in the radial direction of the drive shaft, the inner bore wall 542 and the outer bore wall 541 at least partially overlap, preventing external air from flowing axially along the drive shaft through the orifice 543 into the lawnmower motor 5. The vent on the right side of the figure shows the flow direction of external air entering the lawnmower motor 5 through the vent in one embodiment. As shown, firstly, external air is prevented from flowing radially along the drive shaft to the vent by the retaining ring 521; secondly, external air is blocked by the inner bore wall 542 and cannot flow axially along the drive shaft into the lawnmower motor 5, thereby reducing the possibility of external debris such as grass clippings entering the vent and ensuring the cleanliness of the lawnmower motor 5.

[0165] In another optional embodiment of this specification, referring to Figures 6 and 11, when looking at the exhaust port along the motor axis, at least a portion of the stator coils are visible, that is, the exhaust port is at least partially facing the motor axis. In this embodiment, the air inside the motor flows axially and is directly discharged through the exhaust port, reducing the wind resistance at the motor exhaust port, thereby increasing the airflow speed and ultimately improving the heat dissipation effect of the motor.

[0166] In some embodiments of this specification, as described above, the motor is equipped with an air inlet 53 and an air outlet to allow outside air to flow into the motor and dissipate heat from the internal components before exiting through the air outlet. This is particularly important for the motors of outdoor work vehicles, which have significantly higher rated power and therefore require greater heat dissipation. In the field of lawnmowers, this type of motor with an air inlet 53 and an air outlet is a lawnmower motor 5.

[0167] Since the working environment of multi-functional vehicles is relatively complex, there may be raindrops, grass clippings, sand and gravel near the mowing motor 5. In order to prevent water droplets and other debris from entering the motor and affecting its normal working performance, an air intake channel is configured at the air intake 53.

[0168] In some embodiments of this specification, the air intake passage includes at least one forced deflection section configured to deflect the direction of the cooling air that ultimately flows into the motor at an angle α with respect to the direction of gravity. This is to utilize the difference in inertia to separate the gas from foreign matter mixed in the gas. When the cooling air is forced to deflect by α due to the restriction of the air intake passage, the difference in inertia between the air and foreign matter such as water droplets causes the foreign matter such as water droplets to separate from the air. The foreign matter such as water droplets remains in the air intake passage, while only the air without foreign matter such as water droplets continues to enter the motor.

[0169] In some embodiments of this specification, 90° < α ≤ 180°, meaning that the forced deflection section causes the airflow to be deflected, at least tilted upwards. Correspondingly, the airflow before being acted upon by the forced deflection section is generally downwards. That is, during the process of being acted upon by the forced deflection section, the airflow and any impurities such as water droplets it carries initially have a generally downward tendency, and then are deflected upwards by the forced deflection section. Air, due to its lower inertia, is easier to change direction, but water droplets and other impurities, due to their higher inertia, are less likely to change direction and remain near the forced deflection section.

[0170] It should be noted that the forced deflection section causes the airflow to deflect at an angle relative to the direction of gravity, satisfying the aforementioned characteristics. Air, due to its lower density, easily overcomes gravity and flows upwards, generating a predetermined deflection angle. However, water droplets and other debris, due to their higher density, not only possess greater inertia, making them difficult to deflect, but also have greater mass, making it difficult to overcome gravity and move upwards. Therefore, in some embodiments of this specification, the forced deflection section is configured to cause the cooling airflow to deflect at an angle α with respect to the direction of gravity, where 90° < α ≤ 180°.

[0171] When α = 90°, the deflected airflow flows roughly horizontally. When α > 90°, the deflected airflow flows roughly upwards at an angle and needs to overcome gravity, thus achieving higher efficiency in separating foreign objects such as water droplets. When α = 180°, the deflected airflow faces directly upwards, making it even more effective at using the gravity acting on foreign objects such as water droplets to separate them from the air.

[0172] In some embodiments of this specification, when 120°≤α≤180° and α≥120°, the deflected airflow flows upward at a significant angle and needs to overcome the effect of gravity, thereby improving the efficiency of separating foreign objects such as water droplets.

[0173] In some embodiments of this specification, the air intake passage further includes an airflow deflection section continuous with the forced deflection section. The airflow deflection section is also configured to deflect the air that ultimately enters the motor, further ensuring that the air entering the motor is free of water droplets or other impurities.

[0174] In some embodiments of this specification, an airflow deflection section continuous with the forced deflection section is located in front of the forced deflection section. That is, the airflow first flows through the airflow deflection section and then through the forced deflection section. The airflow deflection section can separate larger foreign objects in the air before the air enters the forced deflection section, thus preventing these larger foreign objects from accumulating in the forced deflection section or even forming a blockage.

[0175] In some embodiments of this specification, the air intake channel includes at least two consecutive airflow deflection sections. Water or other foreign objects flowing with the air are confined within these deflection sections, thereby separating and preventing foreign objects from entering the motor. One of the airflow deflection sections is configured as the aforementioned forced deflection section. Two consecutive airflow deflection sections ensure that fewer water droplets or other foreign objects enter the motor.

[0176] Referring to Figures 12, 13, and 14, Figure 12 shows a lawnmower motor 5 with an air intake channel, Figure 13 is a cross-sectional view of the lawnmower motor 5, and Figure 14 is a partially enlarged view of Figure 13. The air intake channel includes points A, B, C, D, and E. Cooling air flowing into the motor from the outside must sequentially pass through points A, B, C, D, and E. A turning flow segment is formed between points B and C, and another turning flow segment is formed between points C and D. Furthermore, in the airflow channel shown in the figures, a structural feature is also formed between points D and E that forces the airflow to change direction; however, this structural feature has no significant technical effect on separating foreign objects such as water droplets.

[0177] Referring again to Figure 14, the turning flow segment formed between points C and D in the intake channel causes the airflow to flow generally upwards after the turn; that is, this turning flow segment is the aforementioned forced deflection segment. The airflow turning segment adjacent to this forced deflection segment is the turning flow segment between points B and C.

[0178] In some embodiments of this specification, the working motor includes a first end and a second end arranged axially opposite each other. Referring to Figure 13, the first end is the upper end of the mowing motor 5, and the second end is the lower end of the mowing motor 5. The working motor is equipped with a first blocking portion 572 and a second blocking portion 5712 arranged generally radially. The air intake channel is configured to bypass the second end of the first blocking portion 572 and the first end of the second blocking portion 5712. That is, the first blocking portion 572 and the second blocking portion 5712 form a blocking effect on the cooling airflow, thereby forcing the cooling airflow to change direction, and then using the difference in inertia of the airflow, water droplets and other debris to complete the separation.

[0179] In some embodiments of this specification, the air intake passage further includes a deflection wall for deflecting the airflow. The airflow deflection section and the forced deflection section are formed by two adjacent surfaces in the housing. Referring to Figure 14, the forced deflection section is formed when the airflow reaches point C and is blocked by the second blocking part 5712. The deflection section is formed when the airflow reaches point B and is blocked by the deflection wall. Furthermore, the second blocking part 5712 and the deflection wall are two adjacent surfaces in the motor housing. This adjacent positional relationship allows the airflow deflection section and the forced deflection section to have a close physical relationship, enabling the airflow to concentrate near this location to separate water droplets or other foreign objects. If these water droplets or foreign objects accumulate inside the motor, only this location needs to be cleaned.

[0180] In some embodiments of this specification, the first blocking portion 572 has an axial dimension larger than the second blocking portion 5712. Airflow passes through the first air gap around the first blocking portion 572, and airflow passes through the second air gap around the second blocking portion 5712. The different axial dimensions of the two blocking portions result in different dimensions of the two air gaps, meaning the first air gap is smaller than the second air gap. The airflow resistance generated at the first air gap is greater than that at the second air gap, which is used to reduce unnecessary airflow resistance, thereby increasing the air velocity.

[0181] In some embodiments of this specification, the cooling airflow, after being blocked by the obstruction part, flows along the surface of the corresponding obstruction part. Referring to Figure 14, the large size of the first obstruction part 572 allows the airflow to flow stably along the axial direction of the first obstruction part 572 in this region, and the airflow can have a large and stable flow velocity in this region. The lower end of the first obstruction part 572 is the airflow turning section region, and the large flow velocity allows the air and the water droplets and debris mixed in the air to have a large inertia. Because the water droplets and other debris cannot quickly change direction with the airflow due to their large inertia, they can be separated more effectively.

[0182] In some embodiments of this specification, the air intake passage is integrally formed by the housing of the working motor, that is, the air intake passage is not composed of two detachable structural components.

[0183] In another embodiment of this specification, a protective cover 57 is disposed on the outer wall of the motor housing, and the protective cover 57 is detachably connected to the motor housing.

[0184] In some embodiments of this specification, at least a portion of the air intake passage is formed by the protective cover 57 and the outer wall of the motor housing. If the air intake passage becomes blocked, the protective cover 57 can be quickly removed from the motor housing for cleaning.

[0185] In some embodiments of this specification, the airflow channel is formed separately by the protective cover 57. Although the two methods of forming the airflow channel are different, their logic is similar. Those skilled in the art can make non-creative adaptation designs according to the specific structure of the motor, which will not be elaborated here.

[0186] In some embodiments of this specification, the working motor includes a first housing and a second housing detachably connected to each other to form an air intake passage. The first air intake is disposed in the first housing, and the forced deflection section is formed by at least a partial outer contour of the second housing. The first housing is the aforementioned protective cover 57, and the second housing is the aforementioned upper housing 51.

[0187] In another embodiment of this specification, to prevent external water or other debris from entering the motor, a protective cover 57 is provided at the motor's air inlet. The protective cover 57 blocks water or other foreign objects. Referring to Figure 14, the protective cover 57 is configured as a columnar structure connected to the axial end of the lawnmower motor 5. A first air inlet 571 is provided on the side wall of the protective cover 57, and a second air inlet 511 is provided on the upper wall of the motor housing. The protective cover 57 covers the second air inlet 511, which communicates with the interior of the motor. That is, airflow can contact the stator assembly or rotor assembly 56 of the motor by passing through the second air inlet 511.

[0188] In another embodiment of this specification, the protective cover 57 is configured such that the first air inlet 571 is connected to the second air inlet 511 of the motor housing, so that outside air can flow into the motor through the first air inlet 571 and the second air inlet 511 in sequence.

[0189] As described above, in some embodiments of this specification, the protective cover 57 is configured such that the first air inlet 571 is not directly opposite the second air inlet 511, that is, after air enters the protective cover 57 through the first air inlet 571, it must flow through an air intake channel having at least one forced deflection section before it can enter the motor through the second air inlet 511.

[0190] In some embodiments of this specification, the first air inlet 571 is disposed on the circumferential sidewall of the protective cover 57, and the second air inlet 511 is disposed on the axial sidewall of the motor. This means that after entering the protective cover 57 through the first air inlet 571, the air needs to be diverted before entering the motor through the second air inlet 511. If the airflow contains water droplets or other foreign objects, these diversions can separate them, preventing water droplets or other foreign objects from entering the motor.

[0191] As described above, in some embodiments of this specification, the protective cover 57 and / or the motor housing are provided with a first blocking portion 572, which blocks the air entering the protective cover 57 through the first air inlet 571, thereby forcing the air to change direction and separating the water flow or foreign objects. Referring to Figure 14, the first blocking portion 572 is a plate-like structure formed on the protective cover 57.

[0192] In some embodiments of this specification, the protective cover 57 and / or the motor housing are provided with a second blocking portion 5712. The second blocking portion 5712 also blocks air entering the protective cover 57 through the first air inlet 571, and is located on the side of the first blocking portion 572 near the motor air inlet; this further ensures that no foreign objects enter the motor. Referring to Figure 14, the second blocking portion 5712 is a plate-like structure formed in the motor housing.

[0193] In some embodiments of this specification, a temporary storage tank is also provided at the airflow channel for temporarily storing water or other foreign matter separated from the airflow by the first blocking part 572 and / or the second blocking part 5712.

[0194] In some embodiments of this specification, referring to Figure 14, at least one drain hole is provided at the temporary storage tank to drain the liquid separated from the air intake channel, so as to prevent water from continuously accumulating and entering the motor.

[0195] In one embodiment of this specification, referring to Figure 14, the lower wall of the storage tank is inclined and the drain hole is located approximately at the lowest point of the lower wall of the storage tank. This allows the water in the storage tank to be completely drained through the drain hole.

[0196] Referring to Figure 14, the first air inlet 571 is disposed on the circumferential sidewall of the protective cover 57. The airflow passing through the first air inlet 571 comes into contact with the first blocking part 572 and is forced to turn downward. The temporary storage tank is located below the first blocking part 572. Water or other foreign objects separated by the first blocking part 572 are temporarily stored in the temporary storage tank.

[0197] In some embodiments of this specification, the temporary storage tank includes a sidewall that extends upward at least partially along the rotation axis of the operating motor, wherein the lowest point of the sidewall on the radially inner side is higher than the lowest point of the sidewall on the radially outer side. Dust, water, etc., may accumulate in the temporary storage tank. If the drain hole becomes blocked, water will gradually accumulate in the tank, overflowing when the liquid level exceeds one sidewall. In this embodiment, the height of the sidewall on the radially inner side of the temporary storage tank is lower than that on the outer side, thereby ensuring that water in the tank only overflows radially outward, preventing it from overflowing radially inward into the motor's internal space. Here, the height of the sidewall on the radially inner side is the lowest point of the sidewall on the radially inner side; correspondingly, the height of the sidewall on the radially outer side is the lowest point of the sidewall on the radially outer side.

[0198] In one embodiment of this specification, referring to Figure 14, the airflow passing through the first air inlet 571 in a generally radial direction contacts the first blocking portion 572 and forms a first turn, with the airflow direction after the first turn being generally axially downward. The airflow flowing along the surface of the first blocking portion 572 to the temporary storage tank is blocked by the lower wall of the temporary storage tank (i.e., the blocking wall 512) and undergoes a second turn, with the airflow after the second turn flowing generally radially inward along the motor. When the airflow contacts the inner wall of the temporary storage tank on the side near the motor axis (the second blocking portion 5712), it is blocked again and undergoes a third turn, forming an airflow that flows generally upward along the motor axis. At this time, water or other foreign matter that may be mixed in with the airflow will be retained in the temporary storage tank.

[0199] Referring to Figure 14, the airflow after the third turn flows upward along the motor axis. This flow direction is roughly opposite to the direction of gravity. By utilizing the property that the weight of water droplets or other foreign objects is greater than that of air, the separation of water or other foreign objects from air is completed.

[0200] At this point, the water droplets or other foreign objects carried by the airflow entering the protective cover 57 through the first air inlet 571 have been basically separated. That is to say, the airflow entering the motor after the third turn will not affect the motor.

[0201] In another embodiment of this specification, referring to Figure 14, the airflow after the third turn flows upward and then contacts the upper inner wall of the cover to form a fourth turn. The airflow after the fourth turn flows generally radially inward along the motor. The airflow after the fourth turn flows generally radially inward and contacts the contour of the protective cover 57 to form a fifth turn. The airflow after the five turns then enters the internal space of the motor through the motor air inlet.

[0202] It should be further noted that, in some embodiments of this specification, the protective cover 57 and the motor housing are two independent components, that is, the protective cover 57 is disposed on the motor housing by bolts or other connecting parts. In other embodiments of this specification, the protective cover 57 and the motor housing are configured as an integral structure, both being integrally formed and having the aforementioned airflow channel. In yet another embodiment of this specification, a portion of the motor housing is integrally formed with a portion of the protective cover 57; another portion of the motor housing is integrally formed with another portion of the protective cover 57, and the two integrally formed components are combined by bolts or other connecting parts to form the aforementioned airflow channel.

[0203] In other words, the internal space of the motor described above should not be narrowly interpreted as the entire internal space of the motor as a whole, but should be understood according to the specific semantic context. For example, the internal space of the motor mentioned above refers to the space that accommodates a part of the motor stator or rotor; and should not be connected to other spaces that may exist in the motor. In particular, in the structure where the protective cover 57 is integrally formed with the motor housing, the internal space of the motor should not be understood as all the space formed by the protective cover 57 and the motor housing.

[0204] In some embodiments of this specification, the first air inlet 571 is located on the axial end face of the protective cover 57. The airflow direction entering the protective cover 57 through the first air inlet 571 is equivalent to the airflow direction after the first deflection. Then, the air undergoes a second and third deflection to separate water or other impurities from the air. That is, in various embodiments of this specification, external air flows through at least two consecutive airflow deflection sections before entering the internal space housing the motor stator.

[0205] In one embodiment of this specification, referring to Figure 13, the second air inlet 511 at least partially overlaps with the projection of the stator coil of the working motor along the axial direction. Airflow passing through the second air inlet 511 contacts the stator coil and generates a heat dissipation effect. The overlapping axial projections allow the cooling airflow to dissipate heat from the stator coil simply by flowing vertically. That is, the cooling airflow can contact the stator coil and dissipate heat without deflection after passing through the second air inlet 511.

[0206] In some embodiments of this specification, the air outlet at least partially coincides with the projection of the stator coil of the working motor along the axial direction. Hot air near the stator coil can flow directly axially and exit the motor through the air outlet, reducing the resistance encountered by the hot air exiting the motor.

[0207] In some embodiments of this specification, the lawnmower motor 5, serving as the operating motor, is an external rotor motor. The rotor of the lawnmower motor 5 includes a rotor housing located at least partially outside the stator. The rotor housing is provided with a housing hole 565 that at least partially coincides with the projection of the stator coil along the axial direction of the operating motor. The rotor housing hole 565 allows cooling airflow to flow vertically through the stator located within the rotor housing. The fact that the projection of the rotor housing hole and the stator coil along the axial direction at least partially coincides indicates that the cooling airflow can flow vertically downwards without deflection and contact the stator, thereby generating a heat dissipation effect on the stator.

[0208] In some embodiments of this specification, the stator of the lawnmower motor 5 includes stator teeth and windings wound on the stator teeth. Stator slots are provided between two adjacent windings, and the rotor housing bore 565 and the stator slots at least partially overlap in the axial direction. The stator slots form channels for the vertical flow of cooling air. The overlapping projections allow the airflow flowing downwards through the rotor housing bore 565 to continue flowing downwards, passing through the stator slots and carrying away the hot air from the slots, thus achieving a good heat dissipation effect.

[0209] In some embodiments of this specification, the air outlet, the second air inlet 11, and the stator slot of the working motor are at least partially overlapped along the axial direction. That is, the second air inlet 11, the stator slot, and the air outlet form a vertically downward cooling flow section. Air can cool the stator coil by flowing downward along the cooling flow section, resulting in lower resistance to cooling air.

[0210] In some embodiments of this specification, referring to Figures 15, 16, and 17, Figure 15 shows a partial cross-sectional view of the lawnmower motor 5, and Figures 16 and 17 show an isometric view and a top view of the lower housing 52 of the lawnmower motor 5, respectively. The stator of the working motor includes a bridge wire 58 that electrically connects a portion of the windings, and a magnet that rotates the rotor about a rotation axis. The working motor includes a first bracket 522, at least partially located between the bridge wire 58 and the magnet. The first bracket 522 is located between the bridge wire 58 and the magnet to prevent the bridge wire 58 from moving and contacting the magnet due to motor vibration; that is, the first bracket 522 has the technical effect of protecting the bridge wire 58. Referring to Figures 15, 16, and 17, the first bracket 522 has an opening through which a wire supplying power to the stator coil passes and connects to the stator coil.

[0211] In some embodiments of this specification, referring to Figures 16 and 17, at least a portion of the first bracket 522 is radially located between the magnet and the air outlet. That is, at least a portion of the first bracket 522 is located radially outside the air outlet. When air flows downwards to the vicinity of the air outlet, the first bracket 522 guides the airflow towards the vicinity of the air outlet. It also has the technical effect of preventing turbulence from forming after the airflow flows radially outwards, thus affecting the airflow velocity.

[0212] In some optional embodiments, the first bracket 522 is integrally formed into the lower housing 52. In other optional embodiments, the first bracket 522 is fixed to the lower housing 52 by means of fasteners and / or adhesives and / or welding.

[0213] In some optional embodiments, the projection of the first bracket 522 along the direction of the motor axis is arc-shaped, and the center of the arc roughly coincides with the axis of the motor.

[0214] In some optional embodiments, the projection of the first bracket 522 along the axial direction of the motor is a non-closed ring. That is, the projection is an arc shape. The projection has an opening to facilitate the radially inward penetration of the wires supplying power to the stator assembly until they are connected to the stator assembly.

[0215] In some optional embodiments, the opening angle of the non-closed ring is between 20° and 50°. Referring to Figure 17, which shows a top view of the lower housing 52, angle α in the figure represents the opening angle.

[0216] In some more specific embodiments, the α angle is 20°.

[0217] In some more specific embodiments, the α angle is 30°.

[0218] In some more specific embodiments, the α angle is 40°.

[0219] In some more specific embodiments, the α angle is 50°.

[0220] It should be noted that this opening primarily provides a channel for the wire to pass through radially; for this function, it is sufficient to ensure that the opening can accommodate the wire.

[0221] However, in another optional embodiment, the first support 522 is composed of multiple arc-shaped structures, that is, the first support 522 is composed of multiple separate structures. In a more specific embodiment, at least two arc-shaped structures are arranged circumferentially, wherein the gap between two adjacent arc-shaped structures forms the aforementioned opening for the wire to pass through.

[0222] The spaced arc-shaped structure can also produce the technical effect of radially limiting the conductors and / or bridging wires 58.

[0223] In some optional embodiments, the stator includes stator teeth and windings wound around the stator teeth, with at least two non-adjacent windings sharing a common connection to a bridging wire 58. At least a portion of the first bracket 522 is located radially outside the bridging wire 58 to prevent interference between the bridging wire 58 and the moving magnet.

[0224] In some optional embodiments, the lower housing 52 is provided with a communication port, which serves as a hole connecting the inside and outside of the motor to allow water, air, etc. to pass through, and at least a portion of the first bracket 522 is located radially outside the communication port. In some more specific embodiments, the communication port is configured as an air outlet for airflow between the inside and outside of the motor.

[0225] Referring to Figure 13, in a portion of the embodiments described in this specification, a single motor is configured with two first air inlets 571. Each first air inlet 571 includes a plurality of arrayed protective air inlets, which substantially have a filtering effect to prevent large foreign objects such as stones from entering the protective cover 57. The protective cover 57 is made of metal or hard resin, and its high hardness allows it to withstand greater impact forces. During outdoor operations, when large foreign objects such as stones impact the first air inlets 571, the mesh-like protective air inlets, which have a certain filtering effect, can produce a good blocking effect.

[0226] Referring to Figures 13, 18, and 19, in a portion of the embodiments described herein, a first air inlet 571 is located on the circumferential sidewall of the protective cover 57, and a removable filter 59 is disposed at the first air inlet 571. The filter 59 is used to block larger particles of dust and debris, preventing debris from accumulating in the airflow channel used for separating foreign objects. Figures 18 and 19 are schematic diagrams of the protective cover 57 with and without the filter 59, respectively.

[0227] Referring to Figure 18, which shows a schematic diagram of the structure of the protective cover 57, in a portion of the embodiments of this specification, the first air inlet 571 includes a plurality of strip-shaped holes with a width of less than 5 mm, and the filter 59 is located downstream of the strip-shaped holes along the airflow.

[0228] Referring to Figures 18 and 19, in a portion of the embodiments described herein, the protective cover 57 forms a slot 573 for receiving a filter 59, which slides along the slot 573 to cover the inner wall of the first air inlet 571, such that the airflow entering the protective cover 57 through the first air inlet 571 must be filtered by the filter 59.

[0229] Referring to Figures 14 and 18, in some embodiments of this specification, the protective cover 57 is provided with a groove plate 574, which, together with the side wall where the first air inlet 571 is located, forms a filter groove for accommodating the filter section 59. A filter groove opening 575 communicating with the filter groove is provided on the outer periphery of the protective cover 57, through which the filter section 59 is inserted into the filter groove.

[0230] Referring to Figure 18, in a portion of the embodiments described herein, the filter tank extends generally circumferentially along the working motor, that is, the filter portion 59 assembled to the filter tank extends generally circumferentially along the motor.

[0231] Referring to Figure 14, in a portion of the embodiments described herein, the aforementioned first blocking portion 572 is configured as a slot plate 574, and the air entering the protective cover 57 through the filter portion 59 is forced to change direction due to the obstruction of the slot plate 574.

[0232] Referring to Figure 20, in a portion of the embodiments described herein, the filter section 59 includes a mesh section 592 having a filtering effect and a filter substrate 591 that supports the mesh section 592. The groove plate 574 abuts against the filter substrate 591 to position the filter section 59, and a gap exists between the groove plate 574 and the mesh section 592 to allow air to flow in a diverted direction along the groove plate 574.

[0233] Referring to Figure 21, in a portion of the embodiments described herein, the filter substrate 591 includes a support frame and a support block 593 that defines the support frame in a predetermined position. The mesh portion 592 is fixed to the support frame by adhesive bonding or other fixing methods. The support block 593 abuts against the slot plate 574 so that the mesh portion 592 abuts against the first air inlet 571, ensuring that the gas passing through the first air inlet 571 necessarily flows through the mesh portion 592 to produce a filtering effect.

[0234] Referring to Figures 18 and 19, in a portion of the embodiments described in this specification, the limiting structure includes a limiting block 576 disposed on the housing of the working motor. At least a portion of the filter portion 59 is elastic and undergoes bending deformation when assembled to the housing of the working motor. The space occupied by the bent filter portion 59 is reduced, allowing it to pass over the limiting block 576. After the filter portion 59 passes over the limiting block 576, it recovers its deformation and is limited by the limiting block 576, forming a snap-fit ​​engagement.

[0235] Referring to Figure 21, the filter section 59 includes at least two support blocks 593 located at different axial positions of the motor. At least two support blocks 593 are positioned on either side of the limiting block 576 during a portion of the time the filter section 59 is assembled to the first air inlet 571. That is, during the process of the filter section 59 sliding along the filter groove to a predetermined position, the limiting block 576 does not obstruct the support frame. In other words, during the sliding of the filter section 59 along the filter groove, there is no need to continuously apply force to deform the limiting block 576 or the filter section 59, simplifying the installation process.

[0236] Referring to Figures 14 and 18, in a portion of the embodiments described herein, the housing includes a first blocking portion 572 radially abutting against the filter portion 59 and an outer bore wall 541, the first blocking portion 572 and the outer bore wall 541 forming an external air intake passage for air passage. The aforementioned first air intake 571 is disposed on the outer bore wall 541.

[0237] Referring to Figures 18 and 19, in some embodiments of this specification, the housing of the working motor and the filter 59 together form a limiting structure that allows the filter 59 to be removed without tools. This limiting structure allows the user to remove the filter 59 without tools, simplifying the disassembly process. Especially in harsh environments where the filter 59 is prone to clogging and requires frequent cleaning, the tool-free disassembly design greatly simplifies the workflow.

[0238] Referring to Figure 22, the figure shows the structure of the filter section 59 before and after bending deformation. The dashed lines indicate the structure of the filter section 59 after partial deformation. In the figure, the support frame of the filter section 59 undergoes bending deformation under circumferential compression, especially near the end of the support frame.

[0239] Referring to Figure 23, a bottom view of a protective cover 57 with a filter section 59 is shown. In a portion of this embodiment, the filter groove includes a curved space with a local radial dimension larger than that of the filter section 59, for accommodating deformation that occurs when the filter section 59 is assembled to the first air inlet 571. Exemplarily, the radial dimension of the filter groove in the figure is larger than that of the filter section 59; that is, the region at the end of the filter groove is a curved space, providing sufficient space when the support frame of the filter section 59 undergoes bending deformation.

[0240] Referring to Figure 20, the filter section 59 includes a snap-fit ​​block 594, which cannot pass over the limiting snap-fit ​​block 576 before the support frame is deformed. However, after the support frame bends and deforms, the space occupied by the support frame decreases, allowing the snap-fit ​​block 594 to pass over the limiting snap-fit ​​block 576. After the snap-fit ​​block 594 passes over the limiting snap-fit ​​block 576, the support frame will recover under its own elasticity, causing the snap-fit ​​block 594 to abut against the limiting snap-fit ​​block 576, forming a snap-fit ​​engagement to limit the filter section 59.

[0241] Referring to Figures 20 and 21, the filter unit 59 also includes a handle 595 for user operation. When installing the filter unit 59, the user pushes the handle 595 to deform the support frame, allowing the locking block 594 to pass over the limiting locking block 576.

[0242] Conversely, when disassembling the filter section 59, the user pushes the handle section 595 and bends the support frame to deform. After the locking block 594 passes the limit locking block 576, the filter section 59 is pulled outward, thus completing the disassembly of the filter section 59.

[0243] In another embodiment of this specification, at least a portion of the limiting block 576 is elastic and deforms when the filter part 59 is assembled to the first air inlet 571, until the filter part 59 is limited by the limiting block 576, forming a snap-fit ​​engagement. In this embodiment, the limiting block 576 is elastic and has a first form that does not limit the filter part 59 and a second form that can limit the filter part 59. In a more specific embodiment, the first form of the limiting block 576 does not obstruct part of the filter part 59's movement along the filter groove, but when the filter part 59 moves close to a predetermined position, the limiting block 576 must be operated to enter the second form before the filter part 59 is in the predetermined position. Then, the limiting block 576 is released to return to the first form, thus limiting the filter part 59.

[0244] In another embodiment of this specification, at least a portion of the limiting block 576 and the filter portion 59 have the aforementioned elasticity, thereby making it easier to install the filter portion 59 into the predetermined position.

[0245] Referring to Figures 21 and 22, the non-handle portion 595 of the support block 593 near the support frame has a slope, which has a guiding effect. During the process of sliding the filter portion 59 into the predetermined position along the filter groove, the slope can guide and prevent the filter portion 59 from being confined to any non-predetermined position in the filter groove.

[0246] Referring to Figures 22 and 23, the non-handle portion 595 of the support block 593 has a bevel, which has a clearance effect. When the support frame bends and deforms, the end of the support frame bends radially inward. At this time, the bevel does not hinder the bending deformation of the support frame, that is, it has a clearance effect.

[0247] Referring to Figures 19 and 20, a water trough opening 579 is provided at the lower part of the protective cover 57. The water trough opening 579 corresponds to the aforementioned drain hole to avoid the protective cover 57 from blocking the drain hole.

[0248] Referring to Figure 2, in a portion of the embodiments described herein, the first air intake 571 is generally oriented towards the left and / or right side of the multi-functional work vehicle. The multi-functional work vehicle primarily operates while moving forward; that is, its forward movement generates airflow in the front-to-back direction. This airflow may carry a significant amount of dust, grass clippings, and other debris. To reduce the probability of the filter 59 becoming clogged, the first air intake 571 is positioned in the left-to-right direction of the vehicle, i.e., facing the left or right side of the multi-functional work vehicle.

[0249] In one embodiment, the mower 4 with the mowing motor 5 discharges grass to the right. Because the mower 4 discharges a large amount of grass clippings to the right, the amount of dust and grass clippings on the right side is greater and more likely to clog the filter section 59. Therefore, in this embodiment, a single mowing motor 5 is only provided with a first air inlet 571 on its left side and no first air inlet 571 is provided on its right side.

[0250] In some embodiments, the cutter head 4 with the mowing motor 5 discharges grass to the left. Accordingly, a single mowing motor 5 is only provided with a first air inlet 571 on its right side, and no first air inlet 571 is provided on its left side.

[0251] In some embodiments, the grass clippings discharged from the mower 4 are tilted towards the left rear or right rear, making it less likely for the discharged grass clippings to flow back to the first air inlet 571 of the mower motor 5. In this case, the first air inlet 571 is provided on both the left and right sides of the mower motor 5, and the air inlets 53 on the left and right sides of the mower motor 5 are symmetrically arranged. That is, the number of first air inlets 571 provided on a single mower motor 5 is a multiple of 2.

[0252] Referring to Figure 21, in a portion of this embodiment, the filter 59 includes a generally axially extending bolt post 596 configured to engage with a fastener that penetrates at least a portion of the housing. That is, the fastener penetrates the protective cover 57 and connects to the filter 59. Especially during the transport of multi-purpose vehicles, prolonged and frequent vehicle vibrations may cause the aforementioned snap-fit ​​structure to temporarily fail; the fastener prevents the filter 59 from detaching.

[0253] Referring to Figures 1, 24A, and 24B, in some embodiments of this specification, the working mechanism of the multi-functional vehicle can be controlled to rise and fall relative to the ground. That is, the working mechanism can be adjusted by the user to change its ground clearance, thereby changing its working height. The frame 1 is equipped with components such as a height adjustment handle 101 and a mounting plate 102. The two ends of the mounting plate are connected to the frame 1 and the cutting table 4, respectively. A transmission assembly is provided between the height adjustment handle 101 and the mounting plate 102, so that when the height adjustment handle 101 is operated, the mounting plate rotates, pulling the cutting table 4 up or down. It should be noted that the transmission assembly located between the height adjustment handle 101 and the mounting plate 102 is prior art known to those skilled in the art and will not be described in detail here.

[0254] Referring to Figures 24A and 24B, in some embodiments of this specification, the multi-functional vehicle includes a lifting assembly for adjusting the height of the working mechanism. The upper end of the working motor is provided with a recessed groove 577 to prevent interference between the lifting assembly and / or the frame 1 and the motor. When the working mechanism is raised to a high position, the upper end of the working motor is closer to the lifting assembly and / or the frame 1; the recessed groove 577 is provided to avoid interference.

[0255] Referring to Figures 24A and 24B, as described above, the lifting assembly includes a height adjustment handle 101 and a connector 102 connected at both ends to the working mechanism and the frame 1, respectively. The user operates the height adjustment handle 101 to raise or lower the working mechanism. The connector 102 deflects during the raising or lowering of the working mechanism. Especially when the working mechanism is raised to a high position, the upper end of the working motor is close to the connector 102; a clearance groove 577 is provided to avoid interference. That is, when the working mechanism is raised to a high position, a portion of the connector 102 is accommodated within the clearance groove 577. Referring to Figure 24A, the figure shows the cutting table 4, which serves as the working mechanism, being raised to a high position. At this time, a portion of the connector 102 is located within the clearance groove 577, thus preventing interference between the connector 102 and the working motor. In other words, by providing the clearance groove 577, the maximum adjustable height of the cutting table 4 can be increased, ensuring that the connector 102 does not interfere with the working motor.

[0256] In another embodiment of this specification, when the cutting platform 4, which serves as the working mechanism, is raised to a high position, another part of the frame 1 is located within the clearance groove 577. In other words, the clearance groove 577 serves to prevent interference between the cutting platform 4 and the other part of the frame 1. In other words, by providing the clearance groove 577, the maximum adjustable height of the cutting platform 4 can be increased, provided that the frame 1 does not interfere with the working motor.

[0257] In some embodiments of this specification, at least one inner wall of the clearance groove 577 is configured to deflect the flow direction of cooling air flowing into the motor. Referring to Figures 13 and 14, the cooling air entering the motor through the first air inlet 571 is deflected downwards as it flows to the inner wall of the clearance groove 577.

[0258] In some embodiments of this specification, the output axis of the working motor is generally parallel to the plane containing one of the sidewalls of the clearance groove 577. Referring to Figure 14, one of the sidewalls of the clearance groove 577 is generally parallel to the vertical direction.

[0259] In some embodiments of this specification, the projections of the clearance groove 577 and the first air inlet 571 in the left-right direction of the multi-functional work vehicle at least partially overlap. The first air inlet 571 is located slightly above the motor, which increases the space occupied by the motor in the vertical direction, but the clearance groove 577 in the motor housing (or the housing of the protective cover 57) prevents the motor from interfering with the lifting assembly. The first air inlet 571 and the air intake channel for separating water droplets and other foreign objects from the cooling airflow are also retained.

[0260] In one embodiment of this specification, in the direction of the working motor axis, the ratio of the size of the clearance groove 577 to the size of the working motor housing is greater than or equal to 8% and less than or equal to 15%. In another embodiment, in the direction of the working motor axis, the ratio of the size of the clearance groove 577 to the size of the working motor housing is greater than or equal to 10% and less than or equal to 15%.

[0261] In some embodiments of this specification, the non-output end of the working motor is provided with a cover 55, which is configured to protect the working motor. For example, it is used to prevent the non-output end of the working motor from being directly impacted or to prevent foreign objects from entering the motor through the non-output end.

[0262] In some embodiments of this specification, the cover 55 is connected to the working motor by at least three fasteners, which are arranged in a non-uniform circular array relative to the axis of the working motor, thereby ensuring that each of the at least three fasteners has a unique mounting position with the working motor. The at least three fasteners can fully engage with the cover 55 and the working motor only when the cover 55 is fitted into this unique mounting position with the working motor.

[0263] Because the cover 55 and the working motor have only one mounting position, workers do not need to spend a lot of time determining the mounting angle. This means they can quickly complete the positioning process of the cover 55 relative to the working motor, and then assemble at least three fasteners into the corresponding positions on the housing to complete the assembly of the cover 55. This simplifies the assembly process and improves installation efficiency.

[0264] In some embodiments of this specification, at least three fasteners are spaced unequally from the axis of the working motor. In this case, regardless of whether the at least three fasteners are circumferentially evenly arranged relative to the output axis, the cover 55 still has a unique mounting position.

[0265] In some embodiments of this specification, the central angle formed by any two adjacent fasteners and the axis of the working motor is not equal to the central angle formed by the other two adjacent fasteners and the axis of the working motor. In this case, regardless of whether the three fasteners are configured with equal distances relative to the output axis, the cover 55 still has a unique mounting position. Referring to Figures 12 and 23, the cover 55 is fixed to the working motor by three fasteners, and the three fasteners are equidistant from the output axis. However, the three fasteners are not uniform in the circumferential direction relative to the output axis of the working motor, thus having a unique mounting position.

[0266] In some embodiments of this specification, the line connecting the projections of the three fasteners along the output axis direction forms an isosceles triangle. Referring to Figure 23, a bottom view of the protective cover 57 is shown, in which the line connecting the three fasteners approximately forms an isosceles triangle.

[0267] In some embodiments of this specification, the working motor has a plane of symmetry passing through the output axis, wherein an even number of the fasteners are symmetrically arranged on both sides of the plane of symmetry. At least a portion of the working motor is symmetrical with respect to the plane of symmetry, with some fasteners located on one side of the plane of symmetry and another portion on the other side, and these two portions of fasteners are symmetrically arranged with respect to the plane of symmetry. The purpose is to enable the fasteners to generate a substantially uniform tightening force on the cover 55 and the working motor.

[0268] In some embodiments of this specification, the cover 55 is provided with a first air inlet 571 communicating with the interior of the working motor. The non-output end of the working motor is provided with a second air inlet 511 communicating with the first air inlet 571 of the cover 55, and the two form an air intake channel for external air to enter the interior of the motor.

[0269] In some embodiments of this specification, the at least three fasteners are located radially outside the second air inlet 511. This avoids the fasteners obstructing the air intake passage, particularly in some optional embodiments where the fasteners are configured as bolts, and the cover 55 or the housing of the working motor requires bolt posts 596 that mate with the cover 55. The positional relationship between the fasteners and the second air inlet 511 ensures that the bolt posts 596 also do not obstruct airflow in the air intake passage.

[0270] In one embodiment of this specification, the air inlet 53 includes a first air inlet 571 and a second air inlet 511 located on both sides of the at least three fasteners. The three fasteners are located approximately near the center of the working motor in the left-right direction, with the first air inlet 571 and the second air inlet 511 located on the left and right sides of the three fasteners, respectively. Referring to Figure 23, three bolt holes 578 for mounting the fasteners are shown.

[0271] In some embodiments of this specification, the at least three fasteners do not protrude beyond the cover 55 along the output axis direction.

[0272] In some embodiments of this specification, the lower part of the working motor is provided with a connecting hole that connects the internal and external spaces of the motor. The connecting hole is configured to discharge air or water from inside the working motor. The water inside the working motor may be condensate formed inside the motor or water that has entered the motor due to other issues. The air discharged through the connecting hole may be air that has increased in pressure inside the motor due to temperature rise and is being expelled from the motor; in some embodiments, the connecting hole is configured as an air outlet as described in the aforementioned embodiments.

[0273] In some embodiments of this specification, since the lower part of the working motor is close to the working element used for ground maintenance, the high-speed movement of the working element inevitably causes vegetation debris (such as grass clippings) to fly. To prevent debris from flying into the motor through the connecting hole or clogging the connecting hole, a blocking structure is provided at the connecting hole to axially block the connecting hole without obstructing the airflow. That is, the connecting hole does not lose its function of connecting the inside and outside of the motor due to the blocking structure, and is protected from being blocked by vegetation debris by the blocking structure.

[0274] In existing technologies, the connecting hole lacks a blocking structure or only has a filter screen, requiring frequent cleaning by the user. Furthermore, during cleaning, users are highly likely to push grass clippings into the motor, causing even more severe blockages.

[0275] In some embodiments of this specification, the portion of the blocking structure located axially along the connecting hole is a solid structure, used to prevent debris from moving directly axially to the connecting hole. The blocking structure includes a vent hole communicating with the connecting hole, allowing air from inside and outside the motor to circulate through the connecting hole and the vent hole.

[0276] In some embodiments of this specification, the vent is configured to face the rotation direction of the working element. In this embodiment, the working element is a cutter 6 disposed at the output end of a working motor, which rotates during operation to cut grass and other vegetation on the ground. The cutter 6 is driven by the working motor to rotate in one direction. For example, the cutter 6 is driven by the working motor to rotate clockwise, which causes the grass clippings to move clockwise as well. In this embodiment, the opening of the vent is generally oriented towards the clockwise rotation direction, preventing grass clippings from entering the vent due to the action of the cutter 6, thereby avoiding clogging of the vent.

[0277] For example, referring to Figure 25, which is an axonometric view of one of the working motors, the rotation direction of the working motor is indicated by the curved arrow. In this embodiment, the blocking structure is configured as a first blocking member 5011, which includes a first vent 50111, as shown in the figure, the first vent 50111 faces the direction indicated by the curved arrow. That is, the opening direction of the connecting hole is approximately facing the rotation direction of the working motor. In this embodiment, the first blocking member 5011 abuts against the retaining ring 521, preventing air from flowing along the outer wall of the retaining ring 521.

[0278] In some embodiments of this specification, the vent is configured to be located radially inward of the connecting hole relative to the working motor. In this embodiment, the working element is a cutter 6 disposed at the output end of the working motor. The position where the cutter 6 primarily produces the mowing effect during rotation is the side furthest from the rotating shaft. That is, the vent being located radially inward of the connecting hole maximizes the distance between the vent and the end of the cutter 6, making it less likely for the vent to be blocked by grass clippings.

[0279] For example, referring to Figure 26, which is an axonometric view of one of the operating motors, the figure shows that the operating motor is equipped with a second stop 5012, and the second stop 5012 is generally configured as an annular structure. The second stop 5012 has a generally circular hole in its center, the inner diameter of which is larger than the distance between the connecting hole and the motor axis. This generally circular hole and the outer contour of the mowing motor 5 form a second vent hole communicating with the connecting hole.

[0280] In some embodiments of this specification, the blocking structure extends at least partially axially away from the output axis to form a windbreak portion 50131. Referring to Figure 26, the working motor is shown equipped with a third blocking member 5013, the third blocking member 5013 having a generally circular hole in its center, which forms a third vent hole communicating with the connecting hole between the generally circular hole and the outer contour of the mowing motor 5. To further prevent grass clippings from entering the third air inlet 53, the radially outer side of the third blocking member 5013 extends axially downward to form the windbreak portion 50131.

[0281] In multi-functional work vehicles, to increase the effective working area per operation, two or more working motors are configured in the working mechanism. The cutter 6 of one working motor will cause grass clippings to fly towards the other working motor. In this embodiment, the third blocking member 5013 forms a downwardly extending windbreak 50131 that can block the grass clippings and airflow flying from the other motor, thereby preventing grass clippings from clogging the vents.

[0282] In some embodiments of this specification, the blocking structure is configured as a one-piece molded component; the first blocking member 5011, the second blocking member 5012, and the third blocking member 5013 in the aforementioned embodiments are all one-piece molded components. It is mounted to the working motor via at least two fasteners. While the working motor generates significant vibration during operation, which may cause fasteners such as bolts to loosen, the probability of both fasteners loosening simultaneously is lower, thus better ensuring product safety.

[0283] In another embodiment of this specification, the blocking structure consists of a plurality of individually fixed baffles 5014 to the motor. Referring to Figure 29, each baffle 5014 is connected to the working motor by one or more fasteners. Due to the small size of each baffle 5014, a single fastener can also secure it well, meaning that the single fastener is not easily loosened when subjected to vibration from the working motor.

[0284] In another embodiment of this specification, the output end of the working motor is equipped with a negative pressure element for generating negative pressure in the connecting hole. This prevents debris such as grass clippings from accumulating at the connecting hole.

[0285] In another embodiment of this specification, the working motor forms a vertically penetrating airflow channel. Specifically, the working motor has an air inlet 53, the connecting hole is configured as an air outlet, and a negative pressure component is configured to generate negative pressure at the air outlet, thereby creating a stable cooling airflow in the working motor. In other words, an air inlet 53 is located at the upper part of the working motor, and an airflow channel is formed between the air inlet 53 and the connecting hole, penetrating the working motor and generating a cooling effect.

[0286] In some embodiments of this specification, the output end of the working motor is equipped with a negative pressure component and a blocking structure. The blocking structure is used to prevent debris such as grass clippings from accumulating at the connecting hole. Simultaneously, the negative pressure component generates negative pressure at the connecting hole to prevent grass clippings and other debris from accumulating there.

[0287] In another embodiment of this specification, the output end of the working motor is not equipped with the aforementioned blocking structure. This is because the negative pressure component can generate a relatively significant negative pressure near the connecting hole and blow away the air near the connecting hole radially. The grass clippings need to move against the airflow to reach the connecting hole, which means that it is difficult for grass clippings and other debris to accumulate at the connecting hole, thereby avoiding the accumulation of grass clippings in the connecting hole and causing blockage.

[0288] In one embodiment of this specification, referring to Figure 28, a side view of the lawnmower motor 5 is shown. The negative pressure component is configured as a centrifugal fan 510, which generates a negative pressure region in its center as it rotates with the output end of the working motor. The air outlet is located in this negative pressure region. The centrifugal fan 510 generates an airflow that flows radially outward. The aforementioned wind deflector 50131 not only prevents the grass clippings blown radially by the other working motor from moving to the connecting hole, but also guides the grass clippings and airflow blown by the centrifugal fan 510 downward, preventing the grass clippings from approaching the connecting hole of the other working motor.

[0289] In some embodiments of this specification, the negative pressure member and the blocking structure at least partially overlap in the radial projection of the working motor. In a more specific embodiment, the wind deflector 50131 and the centrifugal fan 510 at least partially overlap in the radial projection of the working motor. This ensures that the wind deflector 50131 can radially block the wind and grass clippings blown radially out by the centrifugal fan 510. Referring to Figure 29, the centrifugal fan 510 and the wind deflector 50131 of the third blocking structure are in an axial positional relationship, meaning that the wind moving horizontally under the action of the centrifugal fan 510 will be at least partially blocked by the wind deflector 50131.

[0290] In some existing technologies, the mowing motor or other motor used to drive the mower blade in a lawnmower consists of two housing parts. The wires supplying power to the motor pass through the joint between the two housing parts into the motor's interior. This prevents the two motor parts from fully fitting together and forming an effective seal, leading to risks such as water ingress into the motor.

[0291] In some optional embodiments, the working mechanism of the multi-functional work vehicle is configured as a mowing component for mowing the ground. The mowing component includes a cutter head 4 connected to the frame 1. Referring to Figures 2 and 30, a structural schematic diagram of the cutter head 4 is shown. The cutter head 4 is equipped with a motor and a cutter blade 6 mounted on the motor. The motor drives the cutter blade 6 to rotate at high speed, producing a cutting effect on the ground vegetation, especially cutting the grass. The cutter head 4 shown in the figures has two motors, which drive the cutter blade 6 to rotate and achieve grass cutting. A grass discharge port is provided on the side of the cutter head 4, and a grass discharge cover 8 is provided at the grass discharge port.

[0292] In some optional embodiments, the driving mechanism includes an electric motor connected to the frame 1 and controlled to output power to the drive wheel 7 and rotate the drive wheel 7.

[0293] In some optional embodiments, the lawnmower has two types of motors: the motor located at the cutter head 4 in the working mechanism is the mowing motor 5; and the motor that outputs power to the drive wheel 7 in the traveling mechanism is the traveling motor 10.

[0294] In some optional embodiments, the driving mechanism further includes a reduction gearbox 9, through which the power of the driving motor 10 is transmitted to the reduction gearbox 9, and after the speed is reduced by the reduction gearbox 9, the power is transmitted to the drive wheel 7.

[0295] In one of the optional embodiments, referring to Figure 31, the motor includes a first housing 51 and a second housing 52 that are mated together, that is, the first housing 51 and the second housing 52 together form a motor housing that encloses a portion of the rotor assembly 54 and the stator assembly 53 inside the motor.

[0296] Referring to Figures 32 and 33, in some optional embodiments, the first housing 51 is provided with a receiving groove 511 and a connecting frame 512 at least partially received within the receiving groove 511. The connecting frame 512 and the first housing 51 together define an annular limiting structure 514. The second housing 52 cooperates with the annular limiting structure 514 and seals the joint between the first housing 51 and the second housing 52.

[0297] In some optional embodiments, in order to improve the sealing effect between the first housing 51 and the second housing 52, a sealing structure is configured at the limiting structure 514 to avoid the existence of small gaps between the first housing 51 and the second housing 52 at the limiting structure 514, which would result in poor sealing performance.

[0298] In some optional embodiments, sealant is applied to the limiting structure 514, and after it cures, it forms an adhesive layer that fills the gap between the first housing 51 and the second housing 52. This adhesive layer is the aforementioned sealing structure.

[0299] In some optional embodiments, after assembling the first housing 51 and the second housing 52 in a predetermined relative position, sealant is applied to the joint between the two, and after the sealant cures, it forms the aforementioned adhesive layer as a sealing structure.

[0300] In one of the optional embodiments, an appropriate amount of sealant is applied to the limiting structure 514 defined by the first housing 51 and the connecting frame 512, and then the second housing 52 is disposed on the limiting structure 514 and the sealant is pressed in place. The sealant fills the tiny gap between the limiting structure 514 and the second housing 52, thereby achieving a reliable seal between the first housing 51 and the second housing 52.

[0301] In some optional embodiments, the sealing structure is configured to have a resilient sealing strip or O-ring 515. After the sealing strip or O-ring 515 is assembled onto the limiting structure 514, the second housing 52 is then assembled onto the limiting structure 514 and pressed against the sealing structure. The resilient sealing strip or O-ring 515 can be embedded in the gap between the two and achieve a reliable seal between the first housing 51 and the second housing 52.

[0302] In some optional embodiments, the motor further includes a wire 55 connecting to the control system. Referring to Figures 32 and 33, a portion of the wire 55 is located between the connecting frame 512 and the first housing 51. The wire 55 is not directly compressed by the first housing 51 and the second housing 52, as the first housing 51 and the second housing 52 exert significant compressive force for sealing purposes. Direct compression by the first housing 51 and the second housing 52 could damage the wire 55. Therefore, the wire 55 is positioned between the first housing 51 and the connecting frame 512 at its penetration point, allowing the connecting frame 512 to protect the wire 55. Specifically, a portion of the wire 55 is located within a receiving groove, preventing the connecting frame 512 from exerting excessive compressive force on the wire 55.

[0303] Referring to Figure 35, in some optional embodiments, at least a portion of the rotor assembly 54 of the motor is located around the outer ring of the stator assembly 53; that is, the motor in this embodiment is an external rotor motor. A power supply wire 55 passes radially through the motor housing and connects to the stator assembly 53.

[0304] Referring to Figures 36 and 37, in one of the optional embodiments, the connecting frame 512 includes a limiting portion 5121 extending at least partially along the axial direction of the motor. The limiting portion 5121 guides and restricts the partial axial extension of the conductor 55. After the conductor 55 connecting the stator coil extends through the side wall of the motor housing into the motor interior, it is blocked by the connecting frame 512 and will not contact the rotating rotor, thus avoiding interference between them.

[0305] For example, referring to Figures 34 and 35, a lawnmower motor 5 is shown. The stator assembly 53 has a rotor housing 541 on its outer ring, and the rotor housing 541 is equipped with magnets 542. The rotor housing 541 is connected to the rotor shaft 543. The inner wall of the first housing 51 is provided with a limiting part 5121 extending along the first axis. The wire 55 connecting the stator coil extends through the inner wall of the first housing 51 into the lawnmower motor 5. After being blocked by the limiting part 5121, it will not come into contact with the rotating rotor assembly 54, thus avoiding interference between the two.

[0306] Referring to Figures 33 and 34, Figure 34 shows a cross-sectional schematic diagram of a lawnmower motor 5 according to one embodiment, and Figure 33 shows a structural schematic diagram of a first housing 51 according to one embodiment. As can be seen in the figures, after the wire 55 connecting the stator coil extends into the interior of the lawnmower motor 5, it is blocked by the limiting part 5121 and does not contact the rotor housing 541 until the wire 55 extends axially to the opening end of the rotor housing 541.

[0307] Referring to Figures 34, 34A, and 35, the limiting portion 5121 and the inner wall of the receiving groove 511 form a conductor channel 5123 extending generally along the axial direction. Conductors 55 are arranged along the conductor channel 5123 and connected to the stator assembly 53. Specifically, the conductor 55 includes at least three cables, which separate near the lower end of the limiting portion 5121 and connect to corresponding windings of the stator coil.

[0308] In some optional embodiments, the limiting portion 5121 protrudes from the rotor assembly 54 at at least one end in the axial direction. Referring to Figures 34 and 36, the limiting portion 5121 of the connecting frame 512 extends toward the opening end of the rotor housing 541, and in the axial direction, the connecting frame 512 at least partially protrudes from the region where the rotor housing 541 is located. Referring to Figures 34 and 36, that is, the lower end of the limiting portion 5121 is lower than the opening end of the rotor housing 541, so that when the wire 55 is connected to the stator assembly 53 in a direction perpendicular to the first axis, it will not interfere with the rotor housing 541.

[0309] In one of the more specific embodiments, the connecting bracket 512 has an opening on the side near the opening end of the rotor housing 541, that is, the wire 55 extends to the vicinity of the end of the baffle 1105 and passes through the opening before turning to connect to the stator assembly 53.

[0310] In one of the more specific embodiments, the side of the connecting bracket 512 near the opening end of the rotor housing 541 is a structure without openings, that is, the wire 55 extends to the end of the baffle 1105 and then turns along the outer edge of the baffle 1105 to connect to the stator assembly 53.

[0311] In some more specific embodiments, and in other alternative embodiments, the baffle 1105 has at least a partial arcuate profile at the end near the opening of the rotor housing 541 (refer to Figures 36 and 37), or a buckle is provided at the end of the baffle 1105, the purpose of which is to limit the wire 55 and reduce interference with the rotor housing 541 caused by the vibration of the lawnmower motor 5 during operation.

[0312] In some optional embodiments, the first housing 51 and the second housing 52 cooperate to make the inner wall of the lawnmower motor 5 smooth. Specifically, in some more specific embodiments, referring to Figure 38, a second step 521 is formed on the inner wall of the second housing 52 near the first housing 51. Referring to Figure 32, a first step 516 is formed on the side of the first housing 51 near the second housing 52. The first step 516 and the second step 521 cooperate to achieve a tight connection between the upper and lower housings. In this embodiment, the outer contour of the second step 521 is a part of the aforementioned annular limiting structure 514.

[0313] In some optional embodiments, a downwardly recessed sealant groove is formed in the limiting structure 514 of the first housing 51. During the connection and sealing of the first housing 51 and the second housing 52, sealant is added to the sealant groove. The sealant groove can limit the sealant, thereby preventing excessive sealant overflow when the second housing 52 and the first housing 51 are pressed against each other, which would increase the difficulty of cleaning. In some more specific embodiments, an anaerobic sealant is used.

[0314] More specifically, the installation of the sealant application groove makes it easier for staff to apply sealant at specific points and in specific quantities. Without the sealant application groove, there is no reference for the amount of sealant to be applied during the application process, which can easily lead to too little or too much sealant being applied, thus affecting the overall sealing effect.

[0315] In some optional embodiments, a receiving groove 511 is provided in the first housing 51, through which the wire 55 connected to the stator coil is connected to the interior of the motor housing. More specifically, in some optional embodiments, referring to Figures 33 and 39, Figure 39 shows a structural schematic diagram of the first housing 51 from another perspective. The figure shows that the receiving groove 511 is provided in the first housing 51, causing a notch to be formed at the receiving groove 511 at the second step 521 of the first housing 51, and the wire 55 extends along the receiving groove 511 into the interior of the lawnmower motor 5 housing. A limiting portion 5121 is provided at the receiving groove 511 to at least limit the movement of the wire 55.

[0316] Furthermore, referring to Figures 33, 36, and 37, Figures 36 and 37 show a structural schematic diagram of the connecting frame 512. The connecting frame 512 forms a third step 5125 and a glue groove 5124 on the side near the inside of the mowing motor 5. The third step 5125 cooperates with the second step 521 with a notch to form a closed ring structure step. The glue groove 5124 supplements the glue groove at the notch, forming a closed ring glue groove.

[0317] In one of the optional embodiments, the first housing 51 forms a first step 516, the connecting frame 512 forms a third step 5125, the first step 516 and the third step 5125 together form the aforementioned annular limiting structure 514, and both the first step 516 and the third step 5125 are configured as limiting steps with a height difference in the axial direction of the motor, and the sealing structure is located on the outer ring of the limiting steps.

[0318] In one of the more specific embodiments, referring to Figure 32, the sealing structure is an O-ring 515 located on the outer ring of the limiting step. The second step 521 of the second housing 52 abuts against and squeezes the O-ring 515 at the limiting step of the limiting structure 514, thereby achieving a reliable seal at the connection between the first housing 51 and the second housing 52.

[0319] In some optional embodiments, the connecting bracket 512 is secured to the first housing 51 by at least two first fasteners located on both sides of the conductor 55. Referring to Figures 36 and 37, the connecting bracket is provided with first fastening holes 5127 through which the first fasteners pass.

[0320] In some optional embodiments, the connecting bracket 512 is connected to the first housing 51 by two first fasteners. The first fasteners are distributed substantially evenly on both sides of the conductor 55 to ensure uniform pressure.

[0321] In one of the optional embodiments, the connecting bracket 512 is connected to the first housing 51 by four first fasteners. The first fasteners are generally evenly distributed on both sides of the conductor 55 to ensure uniform pressure. Referring to Figures 36 and 37, the connecting bracket 512 also includes a bolt sleeve 5129, which guides the first fasteners to prevent them from skewing after being inserted into the first fastening holes.

[0322] In some optional embodiments, the first fastener is configured as a bolt, and the first housing 51 is provided with a first bolt post 5112 that mates with the bolt, the first bolt post 5112 being provided with an internal thread that mates with the bolt.

[0323] In one of the alternative embodiments, referring to Figure 32, the wire 55 is fitted with a sealing block 513 at least partially located between the first housing 51 and the connecting frame 512, the connecting frame 512 being pressed against the sealing block 513 to seal the joint between the first housing 51 and the connecting frame 512. Referring to Figure 36, the connecting frame 512 includes a generally radially extending pressure plate 5122, and the sealing block 513 is received in a receiving groove 511 and pressed by the pressure plate 5122 of the connecting frame 512.

[0324] In one of the optional embodiments, the sealing block 513 is configured as a resilient rubber sleeve, which is installed in the receiving groove 511 and squeezed by the pressure plate 5122. The pressure plate 5122 of the connecting frame 512 exerts a squeezing effect on the rubber sleeve under the tightening of the bolts, thereby achieving a seal along the extension direction of the wire 55 and preventing moisture from entering the interior of the mowing motor 5 along the gap between the wire 55 and the housing.

[0325] In some optional embodiments, the connecting frame 512 has a first end face facing the sealing block 513. Referring to Figure 37, a pressing portion 5126 protruding toward the sealing block 513 is formed on the first end face. When the connecting frame 512 is pressed against the sealing block 513, at least a portion of the pressing portion 5126 is pressed into the sealing block 513. Because the pressing portion 5126 protrudes significantly from the first end face and is pressed into the sealing block 513, the sealing block 513 can undergo significant deformation, ensuring that it expands to fill the gap between itself and the receiving groove 511, thus ensuring a reliable sealing effect.

[0326] In some optional embodiments, the receiving groove 511 is provided with a groove positioning portion 5111 for positioning the sealing block 513, and the sealing block 513 is provided with a block positioning portion 5131 for engaging with the groove positioning portion 5111. Referring to Figure 39, the portion of the receiving groove 511 that engages with the sealing block 513 is configured as a concave groove positioning portion 5111. Referring to Figure 32, the sealing block 513 is provided with a partially convex block positioning portion 5131 for engaging with the groove positioning portion 5111, and the two work together to achieve good positioning of the sealing block 513.

[0327] In some optional embodiments, the connecting bracket 512 is secured to the first housing 51 by at least two second fasteners located on both sides of the crimping portion 5126. Referring to Figures 36 and 37, the connecting bracket is provided with second fastening holes 5128 through which the first fasteners pass.

[0328] In some optional embodiments, the second fastener is configured as a bolt, and the first housing 51 is configured with a bolt post that mates with the bolt.

[0329] In some optional embodiments, the connecting bracket 512 is secured to the first housing 51 by an interference fit, snap-fit, or fastener.

[0330] In some optional embodiments, the projection of the receiving groove 511 lies within the projection of the connecting frame 512 along the axial direction of the motor. That is, the connecting frame 512 completely covers the receiving groove 511 to prevent the gap between the receiving groove 511 and the first housing 51 from being exposed outward and resulting in an ineffective seal.

[0331] When the lawnmower motor 5 drives the mower blade 6 to rotate at high speed, vibration is inevitable, especially when the mower blade 6 hits stones or hard grass roots on the ground, the vibration is even greater. In the prior art, the connecting wires 55 inside the motor are prone to deviating from their original position due to vibration, or even interfering with the rotor in the motor.

[0332] In some optional embodiments, the motor further includes a stator assembly 53 and a rotor assembly 54. The rotor assembly 54 includes magnets 542 at least sleeved outside the stator assembly 53; that is, the motor in this embodiment is an external rotor motor. Referring to Figures 39 and 40, the first housing 51 is provided with a first bracket 56 extending at least partially along the axial direction of the motor. In the radial direction of the motor, at least a portion of the first bracket 56 is located between a portion of the stator assembly 53 and the magnets 542. The stator assembly 53 is fixed to the first housing 51, and the first bracket 56, located between the stator assembly 53 and the magnets 542, can protect the internal structure of the first bracket 56. Especially during high-speed operation of the motor, the motor inevitably vibrates, and the wires 55 supplying power to the stator assembly 53 or the bridge wires connecting the windings of the stator assembly 53 vibrate synchronously. The first bracket 56, located between the wires 55 or bridge wires and the magnets 542, prevents the wires 55 or bridge wires from interfering with the magnets 542 due to vibration. In other words, the first bracket 56 provides a good blocking effect for the bridge cable. The upper end of the first bracket 56 is the stator assembly 53. When the bridge cable moves due to motor vibration, it is limited by the first bracket 56 and can only move up and down (axially). Its upward movement only contacts the relatively stationary stator assembly 53, preventing any danger. Furthermore, the radial movement of the bridge cable is limited by the first bracket 56 and cannot reach contact with the rotor, thus avoiding the danger of wear and tear caused by contact between the bridge cable and the rotor.

[0333] In some optional embodiments, referring to Figures 39 and 40, the opening of the first bracket 56 faces the connecting frame 512, and the wires extending from the connecting frame 512 into the motor directly enter the interior of the first bracket 56 through the opening, and then extend axially to supply power to the stator coil.

[0334] However, in another optional embodiment, the first support 56 is composed of multiple arc-shaped structures, that is, the first support 56 is composed of multiple separate structures. In a more specific embodiment, at least two arc-shaped structures are spaced apart circumferentially, wherein the gap between two adjacent arc-shaped structures forms the aforementioned opening for the wire 55 to pass through.

[0335] The spaced arc-shaped structure can also produce the technical effect of radially limiting the conductor 55 and / or the bridging wire.

[0336] As previously described, the conductor 55 consists of at least three cables. These three cables are combined into one and enter the motor through the receiving slot. They then separate at the lower end of the limiting part 5121 and connect to the corresponding windings of the stator coil. The first bracket not only limits the aforementioned bridge wire but also limits the individual cables branching off from the conductor 55 to prevent interference with the rotor assembly.

[0337] In some optional embodiments, the stator includes stator teeth and windings wound around the stator teeth, with at least two non-adjacent windings sharing a common connection with a bridging wire. At least a portion of the first bracket 56 is located radially outside the bridging wire to prevent interference between the bridging wire and the moving magnet 542.

[0338] In some optional embodiments, the first housing 51 is provided with a communication port 517, which serves as a hole for water, air, etc. to pass through, connecting the inside and outside of the motor, and at least a portion of the first bracket 56 is located radially outside the communication port 517.

[0339] In some optional embodiments, the motor further includes a second housing 52 that mates with the first housing 51, the second housing 52 and the first housing 51 together forming a receiving space that at least accommodates a portion of the stator.

[0340] In some optional embodiments, the second housing 52 is provided with an air inlet (not shown), which, together with the connecting port 517, forms a cooling air passage that extends through the receiving space. External air enters the motor through the air inlet and flows along the cooling air passage, then exits from the connecting port 517. That is, the connecting port 517 serves as the motor's air outlet.

[0341] In some optional embodiments, the projections of the air inlet and the connecting port 517 along the axial direction of the motor shaft at least partially coincide. This allows the cooling airflow to flow out of the motor approximately along the axial direction of the motor, thus providing minimal resistance to the cooling airflow.

[0342] In some optional embodiments, the motor is equipped with a measuring component 105 for detecting the amount of rotation of the motor shaft, so as to accurately obtain the motor operating status of the travel mechanism and / or the working mechanism.

[0343] In some optional embodiments, the motor of the working mechanism is equipped with a measuring component 105 to accurately measure the rotation of the motor shaft of the working motor. In some more specific embodiments, the multi-functional vehicle is configured as a lawnmower, and the working mechanism is a mower 4 for mowing and maintenance of the ground. The mower 4 is equipped with two mowing motors 5, and each mowing motor 5 has a cutting blade 6 at its output end. When the mower 4 is working, the grass clippings cut by the cutting blades 6 need to be discharged outward through the grass discharge hood 8. In order to generate a smooth airflow for the two cutting blades 6, the rotation speeds of the two cutting blades 6 need to be as equal as possible, and the rotation angles need to be kept the same at all times. The measuring component 105 can accurately control the position of the cutting blades 6 mounted on the two mowing motors 5, and restore the balance by adjusting the duty cycle of the motors when a phase difference occurs between the two cutting blades 6.

[0344] In another optional embodiment, the motor equipped with a measuring component 105 for detecting the rotation of the motor shaft is used to drive the vehicle; that is, the driving motor 10 used to move the vehicle forward is equipped with the measuring component 105. Real-time acquisition of the rotation of the motor shaft can accurately determine the forward and backward movement of the vehicle, facilitating precise control of the vehicle's forward and backward movement by the vehicle's control system.

[0345] In one of the optional embodiments, referring to Figure 41, the driving mechanism further includes a reduction gearbox 9, through which the power of the driving motor 10 is transmitted to the reduction gearbox 9, and after the speed is reduced by the reduction gearbox 9, the power is transmitted to the drive wheel 7.

[0346] In some optional embodiments, the motor of the driving mechanism is equipped with a measuring component 105 for detecting the amount of rotation of the motor shaft of the driving motor 10, thereby accurately determining the driving speed of the vehicle.

[0347] In one of the optional embodiments, the drive motor 10 includes a motor housing and a drive shaft 106, with the drive shaft 106 at least partially enclosed within the motor housing. Referring to Figures 42 and 44, the motor housing has a detection groove 103 along the axial direction of the drive shaft 106. The detection groove 103 communicates with the interior of the motor, allowing a portion of the drive shaft 106 to extend into the detection groove 103. To effectively seal the detection groove 103, a sealing cap 104 is provided at the detection groove 103.

[0348] In one of the optional embodiments, referring to Figures 44 and 45, one of the sealing cover 104 and the detection groove 103 of the motor housing is provided with a sealing groove 108, and the other of the sealing cover 104 and the detection groove 103 is provided with a protrusion 107 for cooperating with the sealing groove 108 to seal the detection groove 103. The protrusion 107 cooperates with the sealing groove 108 to seal the detection groove 103.

[0349] In some optional embodiments, referring to Figures 46 and 47, Figure 47 is a partially enlarged schematic diagram of Figure 46. The portion of the motor shaft extending into the detection groove 103 is connected to the measuring assembly 105. The measuring assembly 105 includes a measuring plate 1051 and a magnetic block 1053. The measuring plate 1051 can measure the relative rotation between the magnetic block 1053 and the magnetic block, thereby measuring the rotation of the motor shaft.

[0350] In one more specific embodiment, the magnetic block 1053 is fixed to the detection groove 103 or the sealing cover 104, and the measuring plate 1051 is fixed to the motor shaft. The detection groove 103 and the sealing cover 104 are stationary relative to the motor housing, but the motor shaft rotates relative to the motor housing.

[0351] In one more specific embodiment, the magnetic block 1053 is fixed to the motor shaft, and the measuring plate 1051 is fixed to the detection slot 103. That is, the measuring plate 1051 remains stationary, while the magnetic block 1053 rotates with the motor shaft.

[0352] It should be noted that the measuring board 1051 includes a sensor chip and a PCB board supporting the sensor chip. The sensor chip includes multiple Hall elements arranged in a specific geometric pattern. When the motor shaft drives the magnetic block 1053 to rotate relative to the measuring board 1051, the multiple Hall elements inside the chip will measure the magnetic field strength at their respective points and ultimately convert it into the amount of rotation between the two. The measuring component 105 itself is conventional prior art in this field, and the above is only a brief description of its working principle and should not be construed as a limitation on the measuring component 105.

[0353] In one of the optional embodiments, referring to Figure 47, the detection assembly further includes a magnetic sleeve 1052 fitted onto a portion of the motor shaft, the magnetic sleeve 1052 being configured with a recess for receiving the magnetic block 1053. Further, the circumferential sidewall of the magnetic sleeve 1052 is provided with a threaded hole (not shown), and the two are locked together by a screw disposed at the threaded hole that abuts against the outer circumferential wall of the motor shaft.

[0354] Referring to Figure 47, the magnetic block 1053 is housed in the recess of the magnetic sleeve 1052, with the magnetic block 1053 facing the measuring plate 1051. The measuring plate 1051 has a 17-bit single-turn resolution, a maximum recognition speed of 6000 rpm, and interacts with the control system of the multi-functional vehicle via an RS485 interface at a communication rate of 2.5 MHz. The measuring plate 1051 operates within a temperature range of -40°C to 85°C, meeting the stringent operational requirements of the multi-functional vehicle. The measuring plate 1051 connects to the control system via a four-wire interface using RS485 differential communication. Its pins include positive power (5V), ground (Gnd), positive data (DATA+), and negative data (DATA-).

[0355] In some optional embodiments, the measuring plate 1051 is approximately a circular structure with a diameter of 35 mm. The axial distance between the measuring plate 1051 and the magnetic block 1053 is 1.5 mm to 4 mm. The magnetic block 1053 is a cylindrical structure with a thickness of 2.5 mm and a diameter of 8 mm or more. The deviation between the center of the magnetic block 1053 and the center of the sensor chip should be less than or equal to 0.6 mm. Furthermore, the tilt angle between the plane of the magnetic block 1053 and the sensing plane of the sensor chip should be controlled within ±3°.

[0356] In one of the optional embodiments, referring to Figure 43, a first elastic element 109 is disposed between the protrusion 107 and the sealing groove 108. When the protrusion 107 and the sealing groove 108 are engaged, the first elastic element 109 is compressed and deformed, so that the first elastic element 109 can fill the small gap between the protrusion 107 and the sealing groove 108, thereby achieving a reliable seal between the two.

[0357] In some optional embodiments, the protrusion 107 and / or the sealing groove 108 have wire grooves on their sides, through which signal lines connecting the measuring component 105 and the control system pass. That is, one end of the signal line extends along at least a partial outer contour of the motor and passes through the wire groove to connect to the measuring plate 1051; the other end of the signal line is connected to the control system for transmitting the motor's rotation signal to the control system.

[0358] In some optional embodiments, referring to Figure 44, a protrusion 107 is disposed on the motor housing, and a first wire groove is formed on the side of the protrusion 107, that is, the protrusion 107 is an annular structure with an opening. This opening is used to accommodate the wire 55.

[0359] In some optional embodiments, referring to Figure 45, a sealing groove 108 is disposed on the sealing cover 104, and a second wire groove is formed on the side of the sealing groove 108, that is, the sealing groove 108 is an annular structure with an opening. This opening is used to accommodate the wire 55.

[0360] In some optional embodiments, referring to Figure 43, the wire groove is provided with a second elastic element 110, which is pressed by the sealing cover 104 and the detection groove 103 to achieve sealing at the wire groove.

[0361] In some optional embodiments, the first elastic element 109 is a closed annular structure, with one end abutting against the second elastic element 110 and the other end abutting against one of the sealing cap 104 and the detection groove 103. Referring to Figures 42 and 43, in this embodiment, the sealing cap 104, the first elastic element 109, the second elastic element 110, and the sealing groove 108 abut against each other in sequence, and the first elastic element 109 and the second elastic element 110 are pressed by the sealing cap 104 and the detection groove 103 on both sides to achieve a reliable seal.

[0362] In some optional embodiments, the outer wall of the motor housing is provided with heat dissipation fins that extend at least partially along the motor axis. The motor generates a lot of heat during operation, and the heat dissipation fins located on the outer wall of the motor housing can increase the surface area and thus enhance the heat dissipation effect.

[0363] In some optional embodiments, at least two adjacent heat dissipation fins form a wire harness groove 111 that defines the wire 55, extending at least partially axially. That is, at least a portion of the wire 55 is located between two adjacent heat dissipation fins, and the wire 55 does not protrude radially from the heat dissipation fins. This provides protection for the wire 55 from the adjacent heat dissipation fins.

[0364] In some optional embodiments, the motor housing includes a third housing 101 and a fourth housing 102, which form a closed structure. The fourth housing 102 is connected to the gearbox 9. The gearbox 9 is used to transmit the power output from the drive motor 10 to the drive wheel 7.

[0365] In some optional embodiments, the sealing cover 104 and the motor housing are fitted with fasteners. The fasteners exert a large pressing force on the sealing cover 104 and the motor housing. Under the action of this pressing force, the first elastic element 109 and the second elastic element 110 undergo partial deformation and form a reliable seal.

[0366] In some optional embodiments, referring to Figures 42, 43, and 44, the sealing cover 104 has bolt holes, and fasteners pass through the bolt holes and are fitted to the motor housing. At least a portion of the fasteners are located radially outside the sealing groove 108. This prevents external water or other debris from entering the interior of the sealing groove 108 through the bolt holes.

[0367] In some optional embodiments, the sealing cover 104 includes at least two bolt holes, wherein the line connecting the two bolt holes passes through the central axis of the magnetic block 1053. That is, at least two fasteners are arranged approximately centrally symmetrically on both sides of the sealing groove 108, which can make the pressure between the sealing cover 104 and the motor housing more uniform.

[0368] In some optional embodiments, in order to increase the pressing force of the sealing cap 104 on the second elastic member 110, at least two bolt holes are located on both sides of the second elastic member 110 along the extension direction of the wire 55.

[0369] In another optional embodiment, at least two bolt holes are located on both sides of the extension direction of the conductor 55 to ensure uniform pressing force on the second elastic member 110.

[0370] In another embodiment of this specification, the detection slot 103 of the motor housing does not face the non-output end of the motor. Referring to Figure 21, another type of drive motor 10 is shown, which outputs power to the drive wheel 7. This drive motor 10 has a housing different from the aforementioned lawnmower motor 5. The housing of the drive motor 10 includes a fifth housing 1101 and a sixth housing 1102, wherein the fifth housing 1101 is generally cylindrical and the sixth housing 1102 is generally disc-shaped. The disc-shaped structure of the sixth housing 1102 is used to connect the drive motor 10 to the reduction gearbox 9. The reduction gearbox 9 reduces the speed and outputs it to the drive wheel 7, ultimately driving the drive wheel 7.

[0371] In one of the optional embodiments, the working mechanism is configured as a mowing component for mowing the ground. The mowing component includes a cutter head 4 connected to the frame 1. The cutter head 4 is equipped with a motor and a cutter blade 6 disposed on the motor. The motor drives the cutter blade 6 to rotate at high speed to cut the vegetation on the ground, especially the grass.

[0372] In some optional embodiments, the driving mechanism includes an electric motor connected to the frame 1 and controlled to output power to the drive wheel 7 and rotate the drive wheel 7.

[0373] In some optional embodiments, the lawnmower has two types of motors: the motor located at the cutter head 4 in the working mechanism is the mowing motor 5; and the motor that outputs power to the drive wheel 7 in the traveling mechanism is the traveling motor.

[0374] In one of the optional embodiments, referring to Figure 50, the mower 4 of the mowing component includes an upper wall 41 and a peripheral wall 42, and the upper wall 41 and the peripheral wall 42 together form a mowing space, in which the cutter 6 is located; the lower opening of the mower 4 allows the grass on the ground to extend into the mowing space and be cut by the cutter 6, thereby achieving the mowing effect.

[0375] In one of the optional embodiments, referring to Figures 50 and 56, the lower edge of the peripheral wall 42 forms an outward flange, which enhances the structural strength of the peripheral wall 42 and prevents deformation of the peripheral wall 42.

[0376] In one of the optional embodiments, referring to Figure 50, the peripheral wall 42 of the cutter 4 is provided with a grass discharge port 43, which is used to discharge the cut grass shreds out of the cutting space through the grass discharge port 43, so as to avoid the grass shreds accumulating in the cutting space and being repeatedly cut or rubbed by the cutter 6, that is, to avoid the grass shreds from not being discharged from the cutting space in time, which would lead to an increase in the power consumption of the cutting component.

[0377] In some existing technologies, the lawnmower primarily relies on an internal motor to drive the blades at high speed to cut the grass. As users demand higher performance from lawnmowers, the power of the motors in the lawnmowers is also increasing, leading to a greater need for heat dissipation.

[0378] In one of the optional embodiments, referring to Figures 48 and 49, the mowing component includes two mowing motors 5, with a cutter blade 6 mounted on the output end of each motor 5. The mowing motors 5 are arranged approximately perpendicular to the vehicle's forward direction, effectively increasing the effective mowing range of the component. That is, the mowing motors 5 are arranged approximately in the left-right direction, allowing the cutter blade 6 to mow a greater extent of the ground when the outdoor vehicle is traveling in the forward-backward direction.

[0379] In one of the optional embodiments, the mowing component includes three or more mowing motors 5, with a cutter 6 configured at the output end of the mowing motor 5, and the multiple mowing motors 5 are arranged approximately in the left-right direction.

[0380] In some optional embodiments, the mowing motors 5 at the mower 4 are slightly misaligned in the vehicle's forward direction. That is, some mowing motors 5 are closer to the front of the vehicle, and some are closer to the rear. This ensures that the cutters 6 connected to the mowing motors 5 can effectively cover the grass in the left-right direction, preventing missed areas. In other words, the arrangement of the mowing motors 5 roughly in the left-right direction is not a strict requirement.

[0381] In some more specific embodiments, the cutting table 4 is tilted so that the line connecting the two mowing motors 5 is not parallel to the left and right direction of the vehicle, thereby ensuring that there is no missed work area between the two adjacent cutters 6.

[0382] In some more specific embodiments, the grass discharge port 43 is located on the left or right side of the perimeter wall 42 of the cutter 4, that is, the grass clippings in the cutting space are discharged through the grass discharge port 43 on the left or right side. In this embodiment, referring to Figures 48 and 49, the grass discharge port 43 is located on the right side of the cutter 4. The cutting motors 5 of the cutting components operate in the same direction, and the cutting motor 5 on the side away from the grass discharge port 43 can also transmit the cut grass clippings to the side of the grass discharge port 43, and then discharge them outwards through the action of the cutter blade 6 on the side of the grass discharge port 43.

[0383] In one embodiment, the mower 4 is tilted such that its left side is positioned further forward than its right side, and the grass discharge port 43 is located on the right side of the mower 4. This causes the grass discharge port 43 to face approximately to the right rear of the mower, ensuring that the discharged grass clippings will only move diagonally to the rear of the mower. Even if the discharged grass clippings contain small stones, they will not bounce back to the front or middle of the mower, thus preventing injury to the user.

[0384] In one more specific embodiment, the grass discharge port 43 is located at the rear center of the peripheral wall 42 of the cutter table 4. Taking the grass cutting component having two grass cutting motors 5 as an example: the two grass cutting motors 5 operate in opposite directions, and the tangent of the movement trajectory of the cutter blades 6 of the two grass cutting motors 5 in the center of the cutter table 4 is from front to back, so that the grass clippings cut by the cutter blades 6 of the two grass cutting motors 5 are discharged backward through the grass discharge port 43 under the drive of the corresponding cutter blades 6.

[0385] In one of the optional embodiments, referring to FIG48, the grass discharge port 43 is provided with a grass discharge cover 8. The grass discharge cover 8 is used to guide the grass clippings discharged from the grass discharge port 43, so as to prevent the grass discharged by the cutter 6 in the cutter 4 from flying upward and causing grass clippings to fly everywhere, or even causing injury to people around them.

[0386] In one of the optional embodiments, referring to Figure 48, the upper wall 41 of the mower 4 is recessed downwards, and the mowing motor 5 is mounted in the recess. For the mowing component, the cutter 6 is in a relatively fixed position, that is, the cutter 6 rotates at its set height. To enable the mowing component to cut the grass more shallowly, the cutter 6 needs to be positioned as close as possible to the bottom of the mowing space; at the same time, considering that the cutter 6 may collide with relatively hard objects such as stones during operation, the output shaft of the mowing motor 5 needs to be able to withstand a large torque. In this embodiment, mounting the mowing motor 5 in the recess of the upper wall 41 of the mower 4 effectively shortens the length of the output shaft of the mowing motor 5. For a rod-shaped structure of the same material and diameter, a shorter length allows it to have greater torsional strength, that is, increase the durability of the mowing component and improve the product's service life.

[0387] In some optional embodiments, the mowing motor 5 is mounted to the upper wall 41 of the cutter head 4, that is, the upper wall 41 of the cutter head 4 provides upward support for the mowing motor 5 to prevent vertical displacement of the mowing motor 5. The space above the cutter head 4 is not part of the mowing space, therefore, the upper wall 41 of the cutter head 4 has a through hole 44, through which the motor shaft 572 of the mowing motor 5 extends into the mowing space and connects with the cutter blade 6.

[0388] In some optional embodiments, the mowing motor 5 is at least partially located in the space above the mower table 4. The space above the mower table 4 lacks significant airflow, while the high-speed rotation of the cutter blade 6 within the mowing space results in a significantly faster airflow. Therefore, an air passage exists between the mowing motor 5 and the aforementioned through-hole 44, allowing for airflow. Due to the significant difference in airflow velocity inside and outside the mowing space, and the presence of the aforementioned air passage, airflow is generated along the air passage, thus increasing the airflow velocity near the mowing motor 5. Since the mowing motor 5 generates significant heat during operation, especially under high loads, the airflow velocity difference on both sides of the air passage in this embodiment leads to a pressure difference, resulting in a certain airflow within the air passage. This airflow increases the airflow velocity near the mowing motor 5, enhancing the heat dissipation effect on the mowing motor 5.

[0389] Referring to Figure 56, the figure shows that when the mowing motor 5 passes through the through hole 44 and the cutter 6 is installed at the lower end of the mowing motor 5, and the mowing motor 5 is assembled into the through hole 44, an airflow channel still exists at the through hole 44. Because the cutter 6 rotates at high speed, the airflow speed in the mowing space is faster, resulting in lower pressure in the mowing space. Air from the upper part of the mower 4 flows into the mowing space through the aforementioned airflow channel. After flowing into the mowing space, the air from the upper part of the mower 4 naturally flows past the vicinity of the mowing motor 5, thereby cooling the mowing motor 5.

[0390] In some optional embodiments, the lawnmower motor 5 includes at least a housing, a stator assembly 56, and a rotor assembly. The stator assembly 56 includes stator coils and a stator core. The stator coils are connected to a power supply system via wires to supply power to the stator coils. The rotor assembly includes a rotor housing that rotates synchronously about the axis of the output shaft (for ease of description, the axis of the output shaft of the lawnmower motor 5 is referred to as the first axis), a permanent magnet, and a motor shaft. The rotor housing has a receiving cavity that accommodates at least a portion of the stator assembly 56.

[0391] In some optional embodiments, the housing of the mowing motor 5 is provided with a flange 51 connected to the cutter head 4, that is, the flange 51 protrudes radially from the housing so as to make a stable connection with the cutter head 4.

[0392] In some optional embodiments, referring to Figures 51 and 52, a schematic diagram of a lawnmower motor 5 is shown. Referring to Figures 50 and 51, in this embodiment, the flange 51 has a disc-shaped structure, the through hole 44 of the cutter 4 is a non-circular hole, and the diameter of the flange 51 is larger than the minimum dimension of the through hole 44 perpendicular to the first axis, so that the flange 51 of the lawnmower motor 5 can be stably mounted on the upper wall 41 of the cutter 4; furthermore, the diameter of the flange 51 is smaller than the maximum dimension of the through hole 44 perpendicular to the first axis, so that there is a gap at the connection between the flange 51 and the through hole 44, which facilitates the creation of the aforementioned air passage to increase airflow and achieve heat dissipation of the lawnmower motor 5.

[0393] Referring to Figures 5, 7, and 8, the through hole 44 is provided with a partially radially inwardly extending inner portion, which is connected to the flange 51 via a first fastener. The through hole 44 is non-circular due to the inner extension, which also provides a positional basis for axially supporting the flange 51. The first fastener can be a bolt structure, which passes through the inner extension and the flange 51 sequentially from bottom to top and is fitted with a nut to achieve the assembly of the mowing motor 5 and the cutter head 4. In other embodiments, the first fastener can also be a screw, clip, or other structural component; those skilled in the art can choose according to their needs.

[0394] It should be noted that "flange 51" in this specification is only used as an auxiliary structure to connect the two parts, and is not a limitation on the structure to be a disc-shaped structure. In other words, it should not be construed as a limitation on the specific structure of flange 51.

[0395] In some optional embodiments, the housing of the mower motor 5 is equipped with a flange 51 connected to the cutter head 4, i.e., the flange 51 protrudes from the housing. The flange 51 is a non-disc-shaped structure, and the through hole 44 of the cutter head 4 is a circular hole. Similarly, the diameter of the flange 51 (the maximum dimension along the diameter direction of the output shaft of the mower motor 5) is larger than the minimum dimension of the through hole 44 perpendicular to the first axis, thereby allowing the flange 51 of the mower motor 5 to be stably mounted on the upper wall 41 of the cutter head 4. Referring to Figure 53, in this embodiment, the flange 51 is configured as a plurality of flange blocks 52 extending outward along the outside of the mower motor 5, i.e., the flange 51 is a block structure. Referring to Figure 54, the through hole 44 in this embodiment is a circular hole 441. The size of the outer shell of the lawnmower motor 5 in this embodiment is smaller than the maximum size of the circular hole 441 perpendicular to the first axis, so that there is a gap at the connection between the flange 51 and the through hole 44, which facilitates the generation of the aforementioned airflow channel to increase airflow and achieve heat dissipation of the lawnmower motor 5.

[0396] In one of the optional embodiments, the flange 51 in this embodiment is configured as a plurality of flange blocks 52 extending outward along the exterior of the lawnmower motor 5. Referring to Figure 53, the flange 51 in this embodiment is configured as a block structure. In this embodiment, regardless of whether the through hole 44 is circular, the housing or flange 51 of the lawnmower motor 5 is likely to have a significant gap between itself and the through hole 44, forming the aforementioned airflow channel, thereby enhancing the technical effect of heat dissipation for the lawnmower motor 5.

[0397] In some optional embodiments, the housing of the mower motor 5 is equipped with a flange 51 connected to the cutter head 4, i.e., the flange 51 protrudes from the housing. Referring to Figure 53, the flange 51 in this embodiment has a non-disc-shaped structure. The through hole 44 of the cutter head 4 is also a non-circular hole. Similarly, the diameter of the flange 51 is larger than the minimum dimension of the through hole 44 perpendicular to the first axis, so that the flange 51 of the mower motor 5 can be stably mounted on the upper wall 41 of the cutter head 4. Furthermore, the diameter of the flange 51 is smaller than the maximum dimension of the through hole 44 perpendicular to the first axis, so that there is a gap at the connection between the flange 51 and the through hole 44, which facilitates the creation of the aforementioned air passage to increase airflow and achieve heat dissipation of the mower motor 5.

[0398] In summary, the flange 51 and / or the through hole 44 of the cutter head 4 on the housing of the mower motor 5 are non-circular, so that the flange 51 does not completely cover the through hole 44, and air can flow inside and outside the cutter head 4 through the gap between the flange 51 and the through hole 44.

[0399] In one of the optional embodiments, referring to Figure 9, the through hole 44 of the cutter 4 has a downward-facing flange 45. The flange 45 essentially acts as a reinforcing rib, increasing the strength at the edge of the through hole 44. Furthermore, the flange 45 guides airflow, causing more air to flow almost vertically along the flange 45. This airflow path is closer to the surface of the mower motor 5, effectively removing heat from the surface and reducing its temperature.

[0400] In one of the optional embodiments, referring to Figures 52 and 55, Figure 52 shows a structural schematic diagram of the lawn mower motor 5, and Figure 55 is a cross-sectional schematic diagram of the lawn mower motor 5 shown in Figure 52. The outer shell of the lawn mower motor 5 includes an upper shell 53 and a lower shell 54. The upper shell 53 and the lower shell 54 cooperate to form a motor cavity 55. At least a portion of the stator assembly 56 and the rotor assembly are located within the motor cavity 55.

[0401] In some optional embodiments, a flange 51 is disposed at the mating point of the upper housing 53 and the lower housing 54, and the flange 51 seals the upper and lower housing parts of the outer shell, preventing external dust and moisture from entering the motor cavity 55 and affecting the motor performance. As mentioned above, the lawnmower motor 5 is connected to the through hole 44 of the cutter head 4 through the flange 51, so that the upper housing 53 of the lawnmower motor 5 is almost entirely located above the through hole 44, and the lower housing 54 of the lawnmower motor 5 is almost entirely located below the through hole 44, that is, the lower housing 54 of the lawnmower motor 5 is almost entirely located within the mowing space.

[0402] In some optional embodiments, flange 51 is disposed on upper housing 53. Further, in some embodiments, flange 51 is integrally formed with upper housing 53.

[0403] In another optional embodiment, flange 51 is disposed on lower housing 54. In this embodiment, upper housing 53 is located in the space above through hole 44, and a portion of lower housing 54 extends downward through through hole 44 to the space below through hole 44. Further, in one embodiment, flange 51 and lower housing 54 are integrally formed.

[0404] The heat from the lawnmower motor 5 is primarily generated by the stator assembly 56, and the heat is mainly conducted outwards through the outer casing. The upper space of the mower table 4 (i.e., the space above the through-hole 44) only experiences natural wind without significant airflow. However, inside the mowing space, the high-speed rotation of the cutter blade 6 generates a high-speed airflow, resulting in significantly better heat dissipation for the portion of the lawnmower motor 5 located within the mowing space compared to the portion located in the upper space of the mower table 4. In other words, the more of the lawnmower motor 5's casing is located within the mowing space, the faster the heat exchange between the lawnmower motor 5 and the outside environment, and the better the heat dissipation effect. It is also evident that when the upper casing 53 of the lawnmower motor 5 is located above the mower table 4, and at least a portion of the lower casing 54 of the lawnmower motor 5 is located within the mowing space, and the more of the lower casing 54 is located within the mowing space, the better the heat dissipation effect of the lawnmower motor 5.

[0405] In some optional embodiments, the ratio of the dimension of the stator assembly 56 below the upper wall 41 of the through hole 44 in the first axial direction to the dimension of the stator assembly 56 in the first axial direction is greater than or equal to 0.1 and less than or equal to 1. The stator coils in the stator assembly 56 are energized to generate a magnetic field and drive the rotor to rotate, generating a large amount of heat that is conducted outwards. The heat generated by the portion of the stator assembly 56 below the upper wall 41 of the through hole 44 is largely transferred to the portion of the outer casing below the upper wall 41 of the through hole 44. The air near the outer casing is rapidly circulated by the cutter 6 within the mowing space, allowing the heat from the stator assembly 56 to dissipate quickly. Referring to Figure 56, a partial cross-sectional schematic diagram of the cutter head 4 is shown. h3 in the figure represents the dimension of the portion of the stator assembly 56 below the upper wall 41 of the through hole 44 in the first axial direction; h4 represents the dimension of the stator assembly 56 in the first axial direction. The stator assembly 56 includes a stator core and a stator end plate located at the axial end of the stator core. The stator core has stator teeth on which stator coils are wound. The dimension of the stator assembly 56 in the first axial direction is the distance between the two outermost ends of the stator coils or the stator end plate along the first axial direction. Referring to Figure 56, this is 1≥h3 / h4≥0.1.

[0406] In some optional embodiments, the ratio of the dimension of the stator assembly 56 below the upper wall 41 in the first axial direction to the dimension of the stator assembly 56 in the first axial direction is greater than or equal to 0.2 and less than or equal to 0.5, that is, 0.5 ≥ h3 / h4 ≥ 0.2. In this embodiment, the stator assembly 56 still has a considerable portion of the space above the through hole 44, and the portion of the lawnmower motor 5 housing above the cutter head 4 still bears a considerable portion of the heat dissipation responsibility. Correspondingly, the stator assembly 56 still has a portion of the space below the through hole 44 to achieve the aforementioned better heat dissipation effect.

[0407] In some optional embodiments, the ratio of the dimension of the portion below the upper wall 41 of the stator assembly 56 in the first axial direction to the dimension of the stator assembly 56 in the first axial direction is greater than 0.1 and less than or equal to 1, that is, 1≥h3 / h4≥0.1. In this embodiment, the stator assembly 56 still has a considerable portion of space below the through hole 44, in which case the portion of the lawnmower motor 5 housing located below the cutter head 4 may bear relatively more heat dissipation responsibility. Correspondingly, the stator assembly 56 may still have a portion of space above the through hole 44 to achieve a certain heat dissipation effect, but the lawnmower motor 5 as a whole mainly relies on the portion of the housing located below the upper wall 41 of the through hole 44 for heat dissipation, that is, mainly relies on the portion located within the mowing space for heat dissipation.

[0408] In another optional embodiment, the ratio of the dimension of the portion below the upper wall 41 of the stator assembly 56 in the first axial direction to the dimension of the stator assembly 56 in the first axial direction is greater than 0.5 and less than or equal to 1, that is, 1≥h3 / h4≥0.5.

[0409] In one more specific embodiment, the distance from the first axis to the inner wall of the through hole 44 in the first direction is less than the maximum distance from the first axis to the outer contour of the flange 51 in the first direction, and the distance from the first axis to the inner wall of the through hole 44 in the second direction is greater than the maximum distance from the first axis to the outer contour of the flange 51 in the second direction. Both the first and second directions are perpendicular to the first axis. That is, in the first direction, the flange 51 completely covers the through hole 44; but in the second direction, the flange 51 does not completely cover the through hole 44. This allows the flange 51 to be effectively fixed at the through hole 44 without causing the mower motor 5 to slide downwards from the through hole 44, and there is a gap between the mower motor 5 and the inner wall of the through hole 44 to allow air to flow inside and outside the mower table 4, thereby accelerating the airflow near the mower motor 5 and achieving the technical effect of enhancing the heat dissipation of the mower motor 5.

[0410] In one embodiment, a negative pressure element is provided in the mowing space. The negative pressure element is configured to create an air pressure difference on the upper and lower sides of the through hole 44, so that air on the upper side of the mower 4 can enter the mowing space through the gap at the through hole 44 under the action of air pressure, so that more air flows over the surface of the mowing motor 5, resulting in a stronger heat dissipation effect on the mowing motor 5.

[0411] In one more specific embodiment, the negative pressure element is configured as a cutter 6 connected to the output of the mowing motor 5. The rapid rotation of the cutter 6 causes the air in the mowing space to flow rapidly. According to Bernoulli's principle, the pressure drop in the mowing space is low due to the high airflow velocity, resulting in a pressure difference between the upper and lower sides of the through-hole 44. In addition, the rotation effect of the cutter 6 during operation not only directly drives the airflow to rotate, but also discharges the cut grass clippings along the grass discharge cover 8 into the mowing space. This discharge of grass clippings along with some air causes a decrease in air pressure within the mowing space, thus creating a pressure difference between the upper and lower sides of the through-hole 44.

[0412] In some more specific embodiments, the negative pressure element is configured as a fan connected to the output of the lawnmower motor 5. The fan's rotation displaces air near the through-hole 44 axially downwards or radially outwards, thereby creating a pressure difference between the upper and lower sides of the through-hole 44. Specifically, in some embodiments, the fan is a centrifugal fan, which draws air axially from the through-hole 44 and discharges it radially, thus reducing the air pressure at the through-hole 44 and creating a pressure difference between the upper and lower sides of the through-hole 44. In other embodiments, the fan is an axial flow fan that drives the airflow axially downwards. Its rotation draws air axially from the through-hole 44 and discharges it axially downwards, reducing the air pressure at the through-hole 44 and creating a pressure difference between the upper and lower sides of the through-hole 44.

[0413] In another optional embodiment, the mowing motor 5 includes an upper housing 53 and a lower housing 54, the upper housing 53 and the lower housing 54 being connected by a second fastener. The mowing motor 5 is connected to the mower head 4 by a first fastener, and at least one of the first fasteners and at least one of the second fasteners are located in the same radial direction as the output shaft of the mowing motor 5. That is, the line connecting some of the first fasteners and the second fasteners passes approximately through the axis of the output shaft of the mowing motor 5.

[0414] To ensure the stability of the connection between the upper housing 53 and the lower housing 54, it is particularly important to ensure the structural strength of both near the first fastener; otherwise, stress deformation may occur at this location. Correspondingly, to ensure the stability of the connection between the mower motor 5 and the cutter head 4, it is particularly important to ensure the structural strength of both near the first fastener. If one of the first fasteners and one of the second fasteners are located in the same radial direction on the output shaft of the mower motor 5, then the mower motor 5 only needs to ensure increased structural strength in the corresponding circumferential region. Conversely, if the first fastener and the second fastener are located in different circumferential regions, then both radial regions need to have their structural strength deliberately increased to ensure connection stability.

[0415] Referring to Figures 51 and 52, in some more specific embodiments, the lower housing 54 is integrally formed with a flange 51, and the upper housing 53 is provided with bolt posts 531. The flange 51 is provided with holes corresponding to the bolt posts 531, and a second fastener (not shown) is provided that penetrates the flange 51 and is threaded to the bolt posts 531. As mentioned above, in order to ensure the stability of the connection between the upper housing 53 and the lower housing 54, the corresponding position of the flange 51 needs to be thickened. This is because the second fastener fixes both at this position, which bears greater compressive force. The aforementioned first fastener is arranged radially outside the second fastener, which fixes the flange 51 to the cutting table 4. Referring to Figures 51 and 52, bolt holes are provided on the flange 51, and these bolt holes are located radially outside the bolt posts 531. As mentioned earlier, the flange 51 also needs to be thickened to increase its structural strength. In order to reuse the flange 51 area that needs to be thickened due to the first and second fasteners, the first and second fasteners are arranged in the same circumferential area. This avoids material waste caused by thickening in different circumferential areas and also enables the overall weight reduction of the motor.

[0416] In another alternative embodiment, this specification also discloses an outdoor work vehicle, which includes a frame 1, a work mechanism, a user platform, and a driving mechanism as described above, wherein the work mechanism is configured to be mounted to the frame 1 and used to cut vegetation.

[0417] In another embodiment, the outdoor work vehicle also includes a user platform, specifically, the user platform can be configured as a seat 2 for a user to sit in and operate the outdoor work vehicle.

[0418] In one more specific embodiment, the working mechanism includes a cutting platform 4 and a working motor. The cutting platform 4 is connected to the frame 1, and its upper wall 41 forms a downward groove. A through hole 44 is provided at the lowest point of the groove. The working motor passes through the through hole 44 at least partially and is connected to a cutting blade 6. A flushing channel is formed between the working motor and the through hole 44, allowing liquid in the groove to flow into the cutting platform 4. That is, there is a relatively obvious gap between the flange 51 and the through hole 44, allowing water and debris on the upper part of the cutting platform 4 to flow into the interior of the cutting platform 4 through this gap. This allows water to flow to the ground through the flushing channel when rinsing dust and impurities on the upper wall 41 of the cutting platform 4 after operation.

[0419] In some more specific embodiments, the working motor is a mowing motor 5 used to achieve the mowing effect.

[0420] In one more specific embodiment, a gap exists between the flange 51 and the through hole 44 in the horizontal direction, meaning that at least a portion of the water flow can flow completely vertically from the upper space of the cutter 4 into the cutter 4. In another more specific embodiment, a gap exists between a portion of the flange 51 and the through hole 44 along the first axis direction, meaning that the flange 51 and the upper wall 41 of the cutter 4 are not completely fitted together. A portion of the lower outer edge of the flange 51 is recessed upwards and extends to the through hole 44, forming the aforementioned gap through which the water flows. Referring to Figure 57, which is a partially enlarged schematic diagram of the connection between the mowing motor 5 and the cutter 4 in this embodiment, the flange seam 5101 marked in the figure is the gap formed by the partial upward recess of the lower edge of the flange 51. Alternatively, the upper wall 41 of the cutter 4 may be partially recessed downwards and extend to the through hole 44, and this recess is lower than the lower wall of the flange 51, thereby forming the aforementioned gap through which the water flows.

[0421] In another optional embodiment, a plane is drawn through the output axis of the working motor to cut the flushing channel, and the flushing channel and the spaces on both sides of the plane are dumbbell-shaped. Referring to Figure 58, a cross-sectional view of the working motor assembled to the cutting table 4 is shown. The shaded area in the figure indicates that the flushing channel has a structural feature of being narrow in the middle and wide at both ends with the spaces on both sides. When a large foreign object cannot pass through the flushing channel, it will be confined to the middle position. In other words, when impurities move from the top of the cutting table 4 towards the flushing channel, as long as they can pass through the narrow middle of the flushing channel, they can fall into the interior of the cutting table 4. That is, the flushing channel in this embodiment does not have the characteristic of a long and narrow channel, because when a long and narrow channel is blocked by foreign objects, the foreign objects may block at any position in the channel, thus making cleaning difficult.

[0422] In some more specific embodiments, the flushing channel is configured with a throat along its flow path, the cross-sectional area of ​​which is smaller than the cross-sectional area at any point upstream or downstream. As previously mentioned, the throat is not a long, narrow channel, but rather a shorter localized area. If the flushing channel becomes clogged with foreign objects, the blockage will inevitably occur at the throat, thus reducing the difficulty of cleaning.

[0423] In one more specific embodiment, the flushing channel is configured to prevent spheres with a diameter of 5 mm or greater from passing through. Because the flushing channel connects the inside and outside of the cutting platform 4, and the cutting platform 4 contains a high-speed rotating cutter 6, during vegetation cutting operations, it is necessary to prevent objects such as stones from being impacted by the cutter 6 and flying out through the flushing channel. Therefore, the flushing channel is designed to prevent spheres with a diameter of 5 mm or greater from passing through. This is to ensure the safety of the user and surrounding personnel.

[0424] In some more specific embodiments, the flushing channel is configured to allow spheres with a diameter of less than 5 mm to pass through. Spheres with a diameter of less than 5 mm are generally considered to pose little threat, and the flushing channel must be able to pass through small foreign objects; otherwise, it will be impossible to remove the grass debris scattered on the upper wall 41 of the cutter head 4 during operation.

[0425] In one of the more specific embodiments, the flushing channel is configured as a gridded channel, that is, the total width of the flushing channel is greater than 5 mm, but the grid divides the flushing channel into multiple sub-channels, each of which can prevent spheres with a diameter of 5 mm or greater from passing through.

[0426] In one of the more specific embodiments, the grille is configured as a mesh structure, the mesh feature of which does not significantly affect the flow of fluid from the channel, but still achieves the aforementioned prevention of large foreign objects flying out of the channel and causing danger.

[0427] In some optional embodiments, at least a portion of the water flow can pass through the flushing channel along the output axis of the working motor. That is, the water flowing through the corresponding position of the flushing channel can flow into the interior of the cutter head 4 without deflection, reducing the flow resistance of the water flow and ensuring that the water flow above the cutter head 4 can quickly flow into the interior of the cutter head 4.

[0428] In some optional embodiments, the through hole 44 has a downward-facing flange 45 to guide liquid into the cutter head 4 along the flushing channel. The flange 45 not only enhances the structural strength of the inner ring of the through hole 44, but also has a flow guiding characteristic, enabling the water to flow smoothly and stably along the flushing channel.

[0429] In some optional embodiments, the working motor and the header 4 form at least two flushing channels, and the at least two flushing channels are centrally symmetrically distributed relative to the output axis of the working motor. Firstly, the centrally symmetrical structure makes the structural strength of the through holes 44 of the header 4 more uniform, preventing deformation of the header 4 due to localized areas of weak strength. Secondly, the multiple centrally symmetrical flushing channels allow water above the header 4 to flow more quickly into the header 4.

[0430] In some optional embodiments, the mowing motor 5 at least partially penetrates the through-hole 44 and extends downward into the interior of the mower 4. The portion of the mowing motor 5 located inside the mower 4 is connected to a cutter 6, which rotates around a first axis. The mowing motor 5 also has a flange 51 connected to the mower 4. There is a relatively obvious gap between the flange 51 and the through-hole 44, allowing water and debris on the upper part of the mower 4 to flow into the interior of the mower 4 through this gap. As mentioned earlier, the upper wall 41 of the mower 4 forms a downward groove, and the through-hole 44 is located at the bottom of the groove. Therefore, water and debris on the upper part of the mower 4 will inevitably accumulate in this groove. The gap in this embodiment allows water and debris to flow down smoothly.

[0431] In one of the optional embodiments, referring to Figure 51, the working motor includes a flange 51 connected to the cutting table 4. The outer surface of the flange 51 is provided with a first heat dissipation fin assembly, which includes a plurality of first heat dissipation fins 5102 extending outward from the surface of the flange 51. The flange 51, as a structural component extending radially outward along the motor housing, has the technical effect of enhancing heat dissipation. The first heat dissipation fin assembly, as a structural component extending outward along the surface of the flange 51, can improve the heat dissipation effect of the flange 51, thereby improving the heat dissipation effect of the motor.

[0432] In some more specific embodiments, referring to Figure 57, the housing of the lawnmower motor 5 is equipped with a flange 51 connected to the cutter head 4, i.e., the flange 51 protrudes from the housing, and the flange 51 is equipped with first heat dissipation fins 5102. The partial fixed connection between the flange 51 and the housing allows heat from the housing to be conducted to the flange 51 relatively quickly. Furthermore, the first heat dissipation fins 5102 on the flange 51 effectively increase the contact area between the flange 51 and the air, thereby accelerating the speed at which heat is conducted into the air. In the prior art, the flange 51 does not have heat dissipation fins, resulting in a small surface area of ​​the flange 51, which makes it impossible to conduct heat to the outside quickly.

[0433] In some more specific embodiments, the first heat dissipation fin 5102 is a sheet-like or rib-like structure that protrudes upward from the axial end face of the flange 51.

[0434] It should be further noted that both the outer casing and flange 51 are made of metal, and metal is a good conductor of heat, while air is a poor conductor of heat. The essence of heat dissipation in the lawnmower motor 5 is to dissipate the heat in the lawnmower motor 5 to the air; for the same amount of heat, the larger the contact area between the metal and the air, the faster the heat is conducted to the air.

[0435] Furthermore, given a fixed contact area between the metal and the air, the greater the temperature difference between the air and the metal, the faster the heat conduction speed. Therefore, airflow allows cold air to replace part of the air heated by the metal, which in turn allows for faster heat conduction.

[0436] In some optional embodiments, at least a portion of the first heat dissipation fins 5102 are arranged in a circular array around the axis of the output shaft. The circularly distributed first heat dissipation fins 5102 are evenly arranged on the flange 51, that is, they provide approximately equal heat dissipation effect throughout the flange 51. In addition, the circular array arrangement also makes the strength of the flange 51 more uniform.

[0437] In some optional embodiments, at least a portion of the first heat dissipation fins 5102 are configured as arcuate fins extending approximately circumferentially along the outer wall of the flange 51. Furthermore, the plurality of arcuate fins have approximately the same center, and the center is approximately located at the axis of the motor shaft of the lawnmower motor 5.

[0438] In some optional embodiments, referring to Figure 51, at least a portion of the first heat dissipation fins 5102 extend radially along the flange 51. That is, at least a portion of the first heat dissipation fins 5102 are generally radially oriented.

[0439] Because the cutter head 4 has a through hole 44 for the mowing motor 5 to pass through, and the mowing motor 5 is connected to the edge of the through hole 44 by bolts or other fasteners, the weight of the mowing motor 5 and the reaction force generated during operation require the cutter head 4 to support it through fasteners. This inevitably causes the flange 51 of the mowing motor 5 to bear a large force, especially the vibration generated during vehicle operation and the operation of the cutter head 4, which will cause the flange 51 to bear an even greater force. In order to prevent the flange 51 from deforming and causing the position of the cutter 6 located at the output end of the mowing motor 5 to change, the flange 51 needs to have greater structural strength. In some embodiments of this application, by configuring a first heat dissipation fin group on the flange 51, these first heat dissipation fin groups will substantially increase the structural strength of the flange 51, thereby increasing the reliability of the connection between the mowing motor 5 and the cutter head 4.

[0440] As mentioned earlier, the gravity of the lawnmower motor 5 generates a shear force on the flange 51 along the motor axis. The first heat dissipation fins 5102, which extend approximately radially, can better withstand this shear force, thereby increasing the structural strength of the flange 51 and better supporting the lawnmower motor 5. Conversely, while ensuring a certain structural strength, the flange 51 with the first heat dissipation fins 5102 can appropriately reduce the thickness of the flange 51 body, that is, reduce the material used in the flange 51 body, thereby achieving the technical effect of reducing production costs without affecting the overall strength.

[0441] In some optional embodiments, the working motor includes a motor housing that at least partially penetrates the through-hole 44, the motor housing being provided with second heat dissipation fins 5101. The second heat dissipation fins 5101 are used to increase the heat dissipation rate of the motor.

[0442] In some optional embodiments, in order to enhance the ability of the lawnmower motor 5 to dissipate heat to the outside, referring to Figure 57, a second heat dissipation fin 5101 extending in the vertical direction is arranged on the outer wall of the upper shell 53 of the outer casing. This increases the contact area between the upper shell 53 and the outside air, so that the heat in the lawnmower motor 5 can be transferred to the upper shell 53 and then conducted to the outside more quickly.

[0443] In another optional embodiment, heat dissipation fins are provided on the lower housing 54 of the motor, which can also increase the contact area between the motor and the outside air, thereby accelerating the heat dissipation speed of the motor.

[0444] In some optional embodiments, the first heat dissipation fins 5102 extend outward in a radial direction along the motor shaft, that is, each of the first heat dissipation fins 5102 is generally radial outward. When the outside air flows to the flange 51, it is not blocked by the first heat dissipation fins 5102, which means that the air around the flange 51 can be replaced, thereby avoiding the problem of hot air accumulation around the flange 51 causing the heat dissipation speed to slow down.

[0445] In some optional embodiments, at least a portion of the second heat dissipation fins 5101 are configured as sheet-like structures extending along the first axis direction, wherein at least a portion of the first heat dissipation fins 5102 are flush with a portion of the second heat dissipation fins 5101 of the upper housing 53, and at least a portion of the second heat dissipation fins 5101 and a portion of the first heat dissipation fins 5102 together form a substantially continuous heat dissipation surface. When air flows along the second heat dissipation fins 5101 in the vertical direction to the flange 51, the first heat dissipation fins 5102 do not obstruct the hot air, but guide it to the space outside the flange 51, thereby accelerating the airflow speed around the lawnmower motor 5 and achieving the technical effect of increasing the heat dissipation efficiency of the lawnmower motor 5.

[0446] In some optional embodiments, the working motor includes an upper housing 53 and a lower housing 54 that at least partially penetrates the through hole 44, with the flange 51 integrally formed on the upper housing 53.

[0447] In another optional embodiment, the working motor includes an upper housing 53 and a lower housing 54 that at least partially penetrates the through hole 44, with the flange 51 integrally formed on the lower housing 54.

[0448] In some optional embodiments, referring to Figure 53, a third heat dissipation fin 5104 is provided on the outer wall of the lower housing 54 of the outer casing. This increases the contact area between the lower housing 54 and the external air, allowing the heat transferred from the mowing motor 5 to the lower housing 54 to be conducted to the outside more quickly. Furthermore, the cutter head 4 has a high-speed rotating cutter blade 6, resulting in a faster airflow around the lower housing 54 within the mowing space, meaning that the heated air around the lower housing 54 can be carried away more quickly.

[0449] In some optional embodiments, referring to Figure 53, the third heat dissipation fins 5104 disposed on the outer wall of the lower housing 54 extend in the vertical direction. Particularly in embodiments where some flanges 51 have a non-circular structure, air flowing along the second heat dissipation fins 5101 can directly flow through the second heat dissipation fins 5101 to the third heat dissipation fins 5104 during its downward flow. In this process, the air flows smoothly without significant obstruction, thereby achieving a good heat dissipation effect.

[0450] In another optional embodiment, the third heat dissipation fins 5104 disposed on the outer wall of the lower housing 54 extend in the horizontal direction, wherein at least some of the heat dissipation fins are arc-shaped or annular in structure. Since there must be airflow rotating around the mowing motor 5 under the action of the cutter 6 in the cutting table 4, the aforementioned arc-shaped or annular third heat dissipation fins 5104 will not obstruct the annular airflow, so as to facilitate the smooth flow of airflow and carry away the hot air at the third heat dissipation fins 5104.

[0451] In some optional embodiments, the first heat dissipation fin assembly further includes at least one positioning fin 5103, the positioning fin 5103 having a height greater than that of the first heat dissipation fin 5102 in the axial direction of the output shaft. Firstly, the positioning fin 5103 also possesses the heat dissipation effect of the first heat dissipation fin 5102. Secondly, the axial dimension of the positioning fin 5103 is greater than that of the first heat dissipation fin 5102, thus enabling it to assist in positioning the upper housing 53 and the lower housing 54.

[0452] As described above, the housing of the working motor includes an upper housing 53 and a lower housing 54, which are connected by fasteners, such as bolts. Referring to Figure 51, the upper housing 53 is provided with threaded posts, and the upper housing 53 and lower housing 54 are connected by fastening bolts that penetrate the lower housing 54 and engage with the bolt posts 531. A portion of the bolt posts 531 radially protrudes from the outer circumferential surface of the upper housing 53. A flange 51 connecting the upper housing 53 and lower housing 54 is integrally formed on the lower housing 54, and the positioning fins 5103 at the flange 51 are disposed adjacent to the threaded posts of the upper housing 53.

[0453] When the upper housing 53 is placed on top of the lower housing 54, the positioning fins 5103, which protrude significantly from the first heat dissipation fins 5102, provide installation guidance to the assembler: if the upper housing 53 and lower housing 54 are misaligned, the positioning fins 5103 will not limit the upper housing 53 when it is rotated; conversely, if the upper housing 53 and lower housing 54 are correctly positioned, the positioning fins 5103 will limit the upper housing 53 when it is rotated. This avoids the problem of inaccurate installation positions of the upper housing 53 and lower housing 54.

[0454] In some optional embodiments, in order to enable the upper housing 53 to rotate in one direction, the positioning fins 5103 will limit the upper housing 53 when it rotates, and the number of the positioning fins 5103 is equal to the number of the fasteners.

[0455] In some optional embodiments, in order to limit the upper housing 53 when it rotates in both directions (clockwise and counterclockwise), the number of positioning fins 5103 is twice the number of fasteners, that is, positioning fins 5103 are arranged on both sides of a single bolt post 531.

[0456] In some optional embodiments, the upper housing 53 and the lower housing 54 have two or more installable relative positions, that is, after the upper housing 53 is rotated relative to the lower housing 54 by a fixed angle, it is still in the correct installation position. At this time, the number of positioning fins 5103 is a multiple of the bolt posts 531, that is, the number of positioning fins 5103 is a multiple of the number of fasteners.

[0457] In summary, the number of positioning fins 5103 and fasteners is not limited to an absolute multiple relationship. However, in order to reduce the possibility of incorrect installation of the upper housing 53 and the lower housing 54, it is better to make the number of positioning fins 5103 an integer multiple of the number of fasteners.

[0458] In another alternative embodiment, this specification also discloses a push lawnmower, which includes a frame 1, a working mechanism, and a handle as described above; the working mechanism is configured as a cutter head 4 mounted to the frame 1 for performing lawnmowing operations. The handle is disposed on the frame 1 and is held by a user who walks behind the lawnmower and holds the handle to control the lawnmower.

[0459] In another alternative embodiment, this specification also discloses a ride-on lawnmower, which includes not only the frame 1, working mechanism, and traveling mechanism as described above, but also a user platform; the working mechanism is configured as a cutter head 4 mounted to the frame 1 for performing mowing operations. The user platform is configured on the frame 1 and is used to carry the user; specifically, in one more specific embodiment, the user platform is a seat 2 for the user to sit on and operate the lawnmower.

[0460] In another optional embodiment, this specification also discloses an electric gardening vehicle, which includes a frame 1, a working mechanism, a user platform, a power system, and a travel mechanism as described above. The working mechanism is configured as a mower 4 mounted to the frame 1 for performing lawn mowing operations. The user platform is configured on the frame 1 and carries the user. The power system supplies power to the mowing motor 5 in the working mechanism and the travel motor in the travel mechanism. Specifically, in one more specific embodiment, the user platform is a seat 2 for the user to sit on and operate the lawnmower. In another more specific embodiment, the user platform is a standing platform for the user to stand on and operate the lawnmower.

[0461] In another alternative embodiment, this specification also discloses an electric ride-on lawnmower, a multi-functional work vehicle including a frame 1, a working mechanism, a user platform, and a power system as described above. The working mechanism is configured on the frame 1 and is used for performing outdoor work. The user platform is a seat 2 for the user to sit on and operate the lawnmower. The power system supplies power to components such as the garden working mechanism and the travel mechanism.

[0462] In another alternative embodiment, this specification also discloses a zero-steering lawnmower, which includes a frame 1, a working mechanism, a user platform, and a driving mechanism as described above; wherein the frame 1 extends generally along a first direction, and the working mechanism is configured as a cutter 4 mounted to the frame 1 for performing mowing operations.

[0463] Referring to Figure 1, the work vehicle shown in the figure is equipped with a steering lever. The user controls the vehicle by changing the rotation speed of the drive wheel 7 through the steering lever. In other embodiments, the steering lever can be changed to a steering wheel-type structure. That is, the way the vehicle is turned should not be construed as breaking the protection scope of this embodiment.

[0464] Finally, it should be noted that the above-described embodiments are merely specific implementations of the present invention, used to illustrate the technical solutions of the present invention, and not to limit it. The scope of protection of the present invention is not limited thereto. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that any person skilled in the art can still modify or easily conceive of changes to the technical solutions described in the foregoing embodiments within the technical scope disclosed in the present invention, or make equivalent substitutions for some of the technical features; and these modifications, changes, or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should all be covered within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

A multi-functional work vehicle, characterized in that, include: Frame; A driving mechanism, connected to the frame, can controllably drive the multi-functional work vehicle to travel on the ground; The working mechanism, connected to the vehicle frame, is used for ground maintenance work; The working mechanism includes a working motor and a working element that rotates about the output axis of the working motor; The operating motor includes: The first air inlet is located in the housing of the working motor; An air outlet is located in the housing of the working motor; An air intake channel with at least one forced deflection section is formed at the first air intake. The forced deflection section is configured to cause the flow direction of the cooling air to deflect at an angle α with the direction of gravity, so as to use the difference in inertia to separate the gas from foreign matter mixed in the gas, wherein 90°<α≤180°. The multi-functional work vehicle according to claim 1 is characterized in that: The included angle α is in the range of 120°≤α≤180°. The multi-functional work vehicle according to claim 1 is characterized in that: The air intake passage also includes an airflow deflection section that is continuous with the forced deflection section. The multi-functional work vehicle according to claim 3 is characterized in that: The airflow deflection section and the forced deflection section are formed by two adjacent surfaces in the housing. The multi-functional work vehicle according to claim 1 is characterized in that: The working motor includes a first end and a second end arranged opposite each other along the axial direction. The working motor is equipped with a first blocking member and a second blocking part arranged generally in the radial direction. The air intake channel is configured to bypass the second end of the first blocking part and the first end of the second blocking part. The multi-functional work vehicle according to claim 5 is characterized in that: The axial dimension of the first blocking part is larger than that of the second blocking part. The multi-functional work vehicle according to claim 1 is characterized in that: The working motor includes a first housing and a second housing that are detachably connected to each other and form an air intake passage. The first air intake is disposed in the first housing, and the forced deflection section is formed by at least a partial outer contour of the second housing. The multi-functional work vehicle according to claim 7 is characterized in that: The first air inlet is disposed on the circumferential sidewall of the first housing. The multi-functional work vehicle according to claim 7 is characterized in that: The axial sidewall of the second housing is provided with a second air inlet that communicates with the first air inlet. The multi-functional work vehicle according to claim 1 is characterized in that: The working motor is equipped with a temporary storage tank located at the first air inlet, which is used to temporarily store water or other debris separated from the cooling air by the air intake channel. The multi-functional work vehicle according to claim 10 is characterized in that: At least one of the inner walls of the temporary storage tank is configured to form the forced deflection section. The multi-functional work vehicle according to claim 10 is characterized in that: The temporary storage tank is equipped with a drain hole for discharging liquid from the tank into the motor. The multi-functional work vehicle according to claim 10 is characterized in that: The temporary storage tank includes a sidewall that extends upward at least partially along the rotation axis of the working motor, wherein the lowest point of the sidewall on the radially inner side is higher than the lowest point of the sidewall on the radially outer side. The multi-functional work vehicle according to claim 1 is characterized in that: The first air inlet is equipped with a filter, and the housing of the working motor and the filter together form a limiting structure that allows the filter to be disassembled without tools. The multi-functional work vehicle according to claim 14 is characterized in that: The first air inlet includes a plurality of strip-shaped holes with a width of less than 5 mm, and the filter is located downstream of the strip-shaped holes along the airflow. The multi-functional work vehicle according to claim 14 is characterized in that: The housing of the working motor includes a first blocking part, which together with the first air inlet forms a filter groove for accommodating the filter part. The multi-functional work vehicle according to claim 14 is characterized in that: The limiting structure includes a limiting block disposed on the housing of the working motor. At least a portion of the filter part is elastic and bends when assembled to the housing of the working motor until the filter part is limited by the limiting block, forming a snap-fit ​​engagement. The multi-functional work vehicle according to claim 1 is characterized in that: The first air intake is generally oriented toward the left and / or right side of the multi-functional work vehicle. The multi-functional work vehicle according to claim 1 is characterized in that: The working motor configured in the working mechanism has an even number of first air inlets that are approximately symmetrical from left to right. The multi-functional work vehicle according to claim 9 is characterized in that: The second air inlet and / or the air outlet at least partially coincide with the projection of the stator coil of the working motor along the axial direction. The multi-functional work vehicle according to claim 1 is characterized in that: The rotor of the working motor includes a rotor housing located at least partially on the outer ring of the stator, the rotor housing being provided with a rotor housing hole that at least partially coincides with the projection of the stator coil of the working motor along the axial direction. The multi-functional work vehicle according to claim 1 is characterized in that: The stator of the working motor includes a bridge wire that electrically connects a portion of the windings, the rotor of the working motor includes a magnet that rotates about a rotation axis, and the working motor includes a first support that is at least partially located between the bridge wire and the magnet. The multi-functional work vehicle according to claim 22 is characterized in that: At least a portion of the first bracket is located radially between the magnet and the air outlet. A multi-functional work vehicle, characterized in that, include: Frame; The working mechanism, connected to the vehicle frame, is used to mow the grass. A driving mechanism, connected to the frame, can controllably drive the multi-functional work vehicle to travel on the ground; The operating mechanism includes: A cutting table, including a through hole, is connected to the vehicle frame; A mowing motor, disposed on the mower table, the mowing motor at least partially penetrating the through-hole and connected to a cutting blade; the mowing motor includes: The first air inlet is located in the housing of the lawnmower motor; The second air inlet connects to the internal space of the motor, and at least a portion of the rotor and / or the stator of the lawnmower motor is located in the internal space; An air outlet is located in the housing of the motor; An air intake channel containing at least two continuous airflow deflection sections is formed between the first air intake and the second air intake to separate and block foreign objects from entering the internal space. The multi-functional work vehicle according to claim 24 is characterized in that: At least one of the airflow deflection sections is configured to cause the flow direction of the cooling air flowing into the motor to deflect at an angle greater than 90 degrees with the direction of gravity. A rideable lawnmower includes a frame and a running gear, characterized in that, Also includes: Seats, configured on the vehicle frame, are used to support the user; The working mechanism, connected to the vehicle frame, is used to mow the grass. The operating mechanism includes: A cutting table, including a through hole, is connected to the vehicle frame; A mowing motor, disposed on the mower table, the mowing motor at least partially penetrating the through-hole and connected to a cutting blade; the mowing motor includes: The first air inlet is located in the housing of the lawnmower motor; The second air inlet connects to the internal space of the motor, and at least a portion of the rotor and / or the stator of the lawnmower motor is located in the internal space; An air outlet is located in the housing of the motor; An air intake channel with at least one forced deflection section is formed between the first air intake and the second air intake. The forced deflection section is configured to cause the flow direction of the cooling air flowing into the motor to deflect at an angle greater than 90 degrees with the direction of gravity, so as to use the difference in inertia to separate the gas from foreign matter mixed in the gas. A working motor, used in a multi-functional work vehicle, characterized in that, The operating motor includes: The first air inlet is located in the housing of the working motor; The second air inlet connects to the internal space of the working motor, and at least a portion of the rotor and / or the stator of the working motor is located in the internal space; An air outlet is located in the housing of the working motor; An air intake channel with at least one forced deflection section is formed between the first air intake and the second air intake. The forced deflection section is configured to cause the flow direction of the cooling air flowing into the motor to deflect at an angle α with the direction of gravity, so as to use the difference in inertia to separate the gas from foreign matter mixed in the gas, wherein 90°<α≤180°. A multi-functional work vehicle, characterized in that, include: Frame; A driving mechanism, connected to the frame, is used to drive the multi-functional work vehicle. The working mechanism, connected to the vehicle frame, is used to perform maintenance work on the ground; A control system for controlling the driving mechanism and / or the working mechanism; The driving mechanism and / or the working mechanism include a motor, the motor comprising a first housing and a second housing that are mated together; The first housing is provided with a receiving groove and a connecting frame that is at least partially received within the receiving groove; The connecting frame and the first housing together define an annular limiting structure; The limiting structure is provided with a sealing structure for sealing the joint between the first housing and the second housing. The multi-functional work vehicle according to claim 28 is characterized in that: The second housing is pressed against the sealing structure to seal the joint between the first housing and the second housing. The multi-functional work vehicle according to claim 28 is characterized in that: The motor also includes a wire connecting the control system, a portion of which is located between the connecting frame and the first housing. The multi-functional work vehicle according to claim 30 is characterized in that: The connecting frame includes a limiting portion that extends at least partially along the axial direction of the motor, the limiting portion being used to guide and restrict the partial extension of the wire along the axial direction. The multi-functional work vehicle according to claim 31 is characterized in that: The limiting part and the inner wall of the receiving groove form a guide channel that extends approximately along the axis. The multi-functional work vehicle according to claim 31 is characterized in that: The motor includes a stator assembly and a rotor assembly located at least partially outside the stator assembly, wherein the limiting portion protrudes from the rotor assembly at at least one end in the axial direction. The multi-functional work vehicle according to claim 31 is characterized in that: The limiting portion has at least a partial arcuate profile at at least one end in the axial direction. The multi-functional work vehicle according to claim 30 is characterized in that: The connecting frame is fixed to the first housing by at least two first fasteners located on both sides of the conductor. The multi-functional work vehicle according to claim 35 is characterized in that: The wire is fitted with a sealing block located at least partially between the first housing and the connecting frame, and the connecting frame is pressed against the sealing block to seal the joint between the first housing and the connecting frame. The multi-functional work vehicle according to claim 36 is characterized in that: The connecting frame has a first end face facing the sealing block, and a pressing portion protruding toward the sealing block is formed on the first end face; when the connecting frame is pressed against the sealing block, at least a portion of the pressing portion is pressed into the sealing block. The multi-functional work vehicle according to claim 36 is characterized in that: The receiving groove is provided with a groove positioning part for positioning the sealing block, and the sealing block is provided with a block positioning part for cooperating with the groove positioning part. The multi-functional work vehicle according to claim 37 is characterized in that: The connecting frame is fixed to the first housing by at least two second fasteners, which are located on both sides of the crimping portion. The multi-functional work vehicle according to claim 28 is characterized in that: The connecting frame is fixed to the first housing by interference fit, snap-fit ​​or fastener. The multi-functional work vehicle according to claim 28 is characterized in that: In the axial direction of the motor, the projection of the receiving groove lies within the projection of the connecting frame. The multi-functional work vehicle according to claim 28 is characterized in that: The sealing structure is an elastic sealing ring. The multi-functional work vehicle according to claim 28 is characterized in that: The limiting structure is configured as a limiting step with a height difference in the axial direction of the motor, and the sealing structure is located on the outer ring of the limiting step. The multi-functional work vehicle according to claim 30 is characterized in that: The motor further includes a stator assembly and a rotor assembly, the rotor assembly including at least a magnet sleeved outside the stator assembly; the first housing is provided with a first bracket extending at least partially along the axial direction of the motor; in the radial direction of the motor, at least a portion of the first bracket is located between a portion of the stator assembly and the magnet. The multi-functional work vehicle according to claim 44 is characterized in that: The projection of the first bracket along the axial direction of the motor is a non-closed ring. The multi-functional work vehicle according to claim 45 is characterized in that: The opening angle of the non-closed ring is between 20° and 50°. The multi-functional work vehicle according to claim 44 is characterized in that: The stator includes stator teeth and windings wound around the stator teeth, at least two non-adjacent windings are connected together by a bridging wire; at least a portion of the first bracket is located radially outside the bridging wire. A multi-functional work vehicle, characterized in that, include: Frame; A driving mechanism, connected to the frame, is used to drive the multi-functional work vehicle. The working mechanism, connected to the vehicle frame, is used to perform maintenance work on the ground; A control system for controlling the driving mechanism and / or the working mechanism; The working mechanism includes a working motor, and the working motor includes a first housing and a second housing that are connected to each other; The first housing is provided with a receiving groove and a connecting frame that is at least partially received within the receiving groove; The connecting frame and the first housing together define an annular limiting structure; The limiting structure is provided with a sealing structure for sealing the joint between the first housing and the second housing. A rideable lawnmower, characterized in that, include: Frame; Seats, configured on the vehicle frame, are used to support the user; A travel mechanism, connected to the frame, is used to drive the ride-on lawnmower. A mowing mechanism, connected to the vehicle frame, is used to perform mowing operations on the ground; A control system for controlling the driving mechanism and / or the mowing mechanism; The mowing mechanism includes a mower and a mowing motor that passes through the mower. The mowing motor includes a first housing and a second housing that are connected to each other. The first housing is provided with a receiving groove and a connecting frame that is at least partially received within the receiving groove; The connecting frame and the first housing together define an annular limiting structure; The limiting structure is provided with a sealing structure for sealing the joint between the first housing and the second housing.

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