Outer rotor hub motor and mower

Abstract

According to the outer rotor hub motor and the mower provided by the invention, the rotor mechanism rotates relative to the stator mechanism, the rotor mechanism drives the first speed reducing mechanism to rotate so as to drive the second speed reducing mechanism to rotate and enable the external connecting shell to rotate, and the two speed reducing mechanisms are arranged in the outer rotor hub motor, so that the speed reducing ratio is increased; the output torque of the motor is increased, so that the motor has stronger driving force, and the efficiency of the motor is improved. According to the mower, the outer rotor hub motor is adopted, and the connecting shell is connected with the hub of the mower, so that the mower obtains stronger driving force, and the efficiency is higher during mowing operation.

Description

Technical Field

[0001] The present application relates to the technical field of motors, and in particular to an outer rotor hub motor and a lawn mower. Background Art

[0002] A lawn mower is a mechanical tool used to trim lawns, vegetation, etc. It is generally composed of a cutter disc, an engine, a running wheel, a running mechanism, a blade, an armrest, and a control part. The cutter disc is mounted on the running wheel, the engine is mounted on the cutter disc, and the blade is mounted on the output shaft of the engine. The blade uses the high-speed rotation of the engine to cut the lawn or vegetation. Lawn mowers are widely used in lawn trimming and maintenance in home gardens, parks, schools, golf courses, etc., as well as forage harvesting in agricultural production. With the improvement of environmental awareness, the market demand for environmentally friendly lawn mowers such as electric lawn mowers and solar lawn mowers is gradually increasing.

[0003] With the development of lawn mower technology, higher requirements are placed on the motors of electric lawn mowers. Currently, the hub motors used in electric lawn mowers have the problems of small output torque and weak driving force. Summary of the invention

[0004] The technical problem to be solved by the present application is that with the development of lawn mower technology, higher requirements are placed on the motors of electric lawn mowers. Currently, the hub motors used in electric lawn mowers have the problems of small output torque and weak driving force.

[0005] In order to solve the above problems, in order to solve the above technical problems or at least partially solve the above technical problems, the present application provides an outer rotor hub motor and a lawn mower.

[0006] In a first aspect, the present invention discloses an outer rotor hub motor, which comprises a first output shaft, a stator mechanism, a rotor mechanism, a first reduction mechanism, a second reduction mechanism and a connecting shell;

[0007] The rotor mechanism is connected to the first reduction mechanism, the first reduction mechanism is connected to the second reduction mechanism, the second reduction mechanism is connected to the connection shell, the first output shaft is connected to the second reduction mechanism, and the first output shaft is connected to the connection shell;

[0008] The stator mechanism, the rotor mechanism, the first reduction mechanism, and the second reduction mechanism are arranged in the connecting shell. The stator mechanism and the rotor mechanism rotate relative to each other. The first output shaft extends outward from the connecting shell, and the connecting shell rotates relative to the first output shaft.

[0009] Preferably, it comprises a motor bracket and a second output shaft, wherein the motor bracket and the second output shaft are installed in the connecting shell;

[0010] The first output shaft is connected to the second reduction mechanism, the second output shaft is connected to the motor bracket, the second output shaft is connected to the rotor mechanism, the first output shaft and the second output shaft are on the same straight line, and the first output shaft and the second output shaft pass through the center line of the motor bracket;

[0011] The second output shaft rotates relative to the motor bracket and the first output shaft, and the motor bracket is respectively connected to the first reduction mechanism and the second reduction mechanism.

[0012] Preferably, the connecting shell comprises a first outer end cover and a second outer end cover, and the first outer end cover is buckled and connected with the second outer end cover;

[0013] The first outer end cover is provided with a first opening, and the first output shaft extends outward from the first opening.

[0014] Preferably, it comprises a first bearing and a second bearing, wherein the first bearing is respectively connected to the first outer end cover and the first output shaft;

[0015] The second bearings are respectively connected to the second outer end cover and the second output shaft.

[0016] Preferably, a brake is included, and the brake is respectively connected to the motor bracket and the second output shaft.

[0017] Preferably, the brake comprises a rotating member and a fixed member, the rotating member is connected to the second output shaft, the fixed member is connected to the motor bracket, and after the fixed member is energized, it is magnetically connected to the rotating member through magnetic action.

[0018] Preferably, the first reduction mechanism comprises a first sun gear, at least three first planetary gears, and a first inner gear ring, and the first planetary gears are respectively meshed with the first sun gear and the first inner gear ring;

[0019] The first sun gear is installed at the center of the motor bracket, the first sun gear is connected to the second output shaft, and the first inner gear ring is fixedly connected to the motor bracket.

[0020] Preferably, the second reduction mechanism comprises a second sun gear, at least three second planetary gears, and a second inner gear ring, and the second planetary gears are respectively meshed with the second sun gear and the second inner gear ring;

[0021] The second sun gear is connected to the first planetary gear, the second planetary gear is connected to the motor bracket, and the second inner gear ring is connected to the first outer end cover.

[0022] Preferably, it comprises a control module, wherein the control module is respectively connected to the stator mechanism and the brake;

[0023] The control module includes a connecting line, the first output shaft is hollow, and the connecting line extends out from the hollow position of the first output shaft.

[0024] In a second aspect, the present invention discloses a lawn mower, which comprises any one of the above-mentioned outer rotor hub motors.

[0025] The above technical solution provided by this application has the following advantages compared with the prior art:

[0026] The outer rotor hub motor and lawn mower provided in the present application, the outer rotor hub motor mentioned, the rotor mechanism rotates relative to the stator mechanism, the rotor mechanism drives the first reduction mechanism to rotate, thereby driving the second reduction mechanism to rotate, so that the external connecting shell rotates, two reduction mechanisms are arranged in the outer rotor hub motor, which increases the reduction ratio, increases the output torque of the motor, makes the motor have a stronger driving force, and improves the efficiency of the motor.

[0027] The lawn mower mentioned that it uses an outer rotor hub motor, and the connecting shell is connected to the hub of the lawn mower, so that the lawn mower can obtain stronger driving force and higher efficiency when mowing.

[0028] Furthermore, the hub motor is provided with a brake, which can allow the hub motor to have a power-off braking function and quickly stop the rotation of the connecting shell. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0030] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0031] Figure 1 A schematic diagram of the structure of an outer rotor hub motor provided in this application;

[0032] Figure 2 A schematic diagram of the exploded structure of an outer rotor hub motor provided in this application;

[0033] Figure 3 A schematic diagram of the structure of an outer rotor hub motor provided in this application Figure 2 ;

[0034] Figure 4 for Figure 3 A-A' cross-sectional structural schematic diagram;

[0035] Figure 5 A schematic diagram of the connection structure of a motor bracket, a first output shaft, a stator mechanism, a rotor mechanism, and a first reduction mechanism of an outer rotor hub motor provided in the present application;

[0036] Figure 6 A schematic structural diagram of a motor bracket of an outer rotor hub motor provided in the present application;

[0037] Figure 7 A schematic diagram of the connection structure of a brake, a stator mechanism and a rotor mechanism of an outer rotor hub motor provided in the present application;

[0038] Figure 8 A schematic diagram of the structure of a brake for an outer rotor hub motor provided in this application Figure 1 ;

[0039] Fig. 9 A schematic diagram of the structure of a brake for an outer rotor hub motor provided in this application Figure 2 ;

[0040] Fig.10 A schematic diagram of the connection structure between a first reduction mechanism and a second reduction mechanism of an outer rotor hub motor provided in the present application;

[0041] Fig.11 This is a schematic diagram of the exploded structure of a first reduction mechanism and a second reduction mechanism of an outer rotor hub motor provided in the present application;

[0042] Fig.12 A schematic diagram of the structure of the first reduction mechanism of an outer rotor hub motor provided in this application Figure 1 ;

[0043] Fig.13 A schematic diagram of the structure of the first reduction mechanism of an outer rotor hub motor provided in this application Figure 2 ;

[0044] Fig.14 A schematic diagram of the structure of the second reduction mechanism of an outer rotor hub motor provided in this application Figure 1 ;

[0045] Fig.15 A schematic diagram of the structure of the second reduction mechanism of an outer rotor hub motor provided in this application Figure 2 .

[0046] Description of reference numerals:

[0047] 1. Outer rotor hub motor;

[0048] 11. Motor bracket; 111. First output shaft; 112. Second output shaft; 113. Mounting groove; 114. Through hole; 115. Rotating bearing;

[0049] 12. Stator mechanism;

[0050] 13. Rotor mechanism;

[0051] 14. first reduction mechanism; 141. first sun gear; 142. first planetary gear; 1421. first drive shaft; 143. first inner gear ring;

[0052] 15. second reduction mechanism; 151. second sun gear; 1511. connecting plate; 152. second planetary gear; 1521. second drive shaft; 1522. drive bearing; 153. second inner gear ring; 154. gear rack; 1541. fixing column; 1542. fixing position; 1543. gear groove;

[0053] 16, connecting shell; 161, first outer end cover; 1611, first opening; 1612, first bearing; 1613, second sealing member; 162, second outer end cover; 1621, second bearing;

[0054] 17. brake; 171. rotating part; 172. fixed part;

[0055] 18. Control module; 181. Connecting wire. DETAILED DESCRIPTION

[0056] In order to make the purpose, technical solutions and advantages of this application clearer, the technical solutions in this application will be clearly and completely described below in conjunction with the drawings in this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0057] First, see Figure 1-15The present invention discloses an outer rotor hub motor 1, which can be connected to a device with a hub, such as a lawn mower, a vehicle and the like, for providing driving power, and comprises a first output shaft 111, a stator mechanism 12, a rotor mechanism 13, a first reduction mechanism 14, a second reduction mechanism 15 and a connecting shell 16, wherein the rotor mechanism 13 is connected to the first reduction mechanism 14, the first reduction mechanism 14 is connected to the second reduction mechanism 15, the second reduction mechanism 15 is connected to the connecting shell 16, the first output shaft 111 is connected to the second reduction mechanism 15, the first output shaft 111 is connected to the connecting shell 16, the stator mechanism 12, the rotor mechanism 13, the first reduction mechanism 14 and the second reduction mechanism 15 are arranged in the connecting shell 16, the stator mechanism 12 and the rotor mechanism 13 rotate relative to each other, the first output shaft 111 extends outward from the connecting shell 16, and the connecting shell 16 rotates relative to the first output shaft 111.

[0058] Specifically, the rotor mechanism 13 rotates relative to the stator mechanism 12, the rotor mechanism 13 can drive the first reduction mechanism 14 to rotate, the first reduction mechanism 14 drives the second reduction mechanism 15 to rotate, the second reduction mechanism 15 drives the connecting shell 16 to rotate, the connecting shell 16 rotates relative to the first output shaft 111, the first output shaft 111 is fixedly installed in the equipment, the connecting shell 16 is the output end, driving the mechanism to be rotated (such as a wheel hub, etc.) to rotate.

[0059] It can be understood that the rotor mechanism 13 rotates relative to the stator mechanism 12, and the rotor mechanism 13 drives the first reduction mechanism 14 to rotate, thereby driving the second reduction mechanism 15 to rotate, so that the external connection shell 16 rotates. By setting two reduction mechanisms, the reduction ratio is increased, the output torque of the motor is increased, the motor has a stronger driving force, and the efficiency of the motor is improved. Furthermore, the hub motor is provided with a brake 17, which can make the hub motor have the function of power-off braking and quickly stop the rotation of the connection shell 16.

[0060] The outer rotor hub motor 1 includes a motor bracket 11 and a second output shaft 112. The motor bracket 11 and the second output shaft 112 are installed in the connecting shell 16. The first output shaft 111 is connected to the second reduction mechanism 15, and the second output shaft 112 is connected to the rotor mechanism 13. The first output shaft 111 and the second output shaft 112 are on the same straight line, and the first output shaft 111 and the second output shaft 112 pass through the center line of the motor bracket 11. The second output shaft 112 rotates relative to the motor bracket 11 and the first output shaft 111. The motor bracket 11 is respectively connected to the first reduction mechanism 14 and the second reduction mechanism 15.

[0061] Specifically, the first output shaft 111 is fixed to the motor bracket 11 through the first reduction mechanism 14, the first reduction mechanism 14 and the second reduction mechanism 15 are arranged on the motor bracket 11, the second output shaft 112 and the first output shaft 111 are arranged at both ends of the motor bracket 11, the first output shaft 111, the second reduction mechanism 15, the first reduction mechanism 14, and the second output shaft 112 are sequentially installed on the motor bracket 11, the motor bracket 11 is provided with a mounting groove 113 corresponding to the first reduction mechanism 14, the first reduction mechanism 14 is installed in the mounting groove 113, and a through hole 114 is provided at the center of the motor bracket 11, and the through hole 114 and the mounting groove 113 are connected. 13 is connected, the second output shaft 112 is connected to the first reduction mechanism 14 through the through hole 114, a rotating bearing 115 is arranged in the through hole 114, and the rotating bearing 115 is sleeved on the second output shaft 112, so that the second output shaft 112 can rotate relative to the motor bracket 11; in addition, the first output shaft 111, the second output shaft 112, the first reduction mechanism 14, and the second reduction mechanism 15 are all installed along the center line of the motor bracket 11, and each rotating mechanism rotates around the center line of the motor bracket 11, so that the rotor mechanism 13, the stator mechanism 12, the first reduction mechanism 14, the second reduction mechanism 15 and the first output shaft 111 are coaxial.

[0062] As an embodiment, the motor stator mechanism 12 adopts a 24-slot outer rotor form, and the motor rotor mechanism 13 adopts a 28-pole permanent magnet structure form.

[0063] The connecting shell 16 includes a first outer end cover 161 and a second outer end cover 162 . The first outer end cover 161 and the second outer end cover 162 are buckled and connected. The first outer end cover 161 is provided with a first opening 1611 , and the first output shaft 111 extends outward from the first opening 1611 .

[0064] Specifically, the first outer end cover 161 and the second outer end cover 162 are buckled together to form an accommodating space, and the first reduction mechanism 14, the second reduction mechanism 15, the motor bracket 11, and the second output shaft 112 are installed in the accommodating space, and the first output shaft 111 extends outward from the first opening 1611 of the first outer end cover 161.

[0065] As an embodiment, the first outer end cover 161 and the second outer end cover 162 are fixedly connected by fasteners.

[0066] As an embodiment, a first seal is disposed between the first outer end cover 161 and the second outer end cover 162. The first seal can make the first outer end cover 161 and the second outer end cover 162 more tightly connected so that the gap between the two is filled by the first seal.

[0067] The outer rotor hub motor 1 includes a first bearing 1612 and a second bearing 1621, wherein the first bearing 1612 is respectively connected to the first outer end cover 161 and the first output shaft 111, and the second bearing 1621 is respectively connected to the second outer end cover 162 and the second output shaft 112. Specifically, since the first output shaft 111 is a fixed component and does not participate in the rotation of the mechanism, the inner ring of the first bearing 1612 is connected to the first output shaft 111, and the outer ring is connected to the first outer end cover 161, so that the first output shaft 111 and the first outer end cover 161 rotate relative to each other, the second outer end cover 162 is fixed to the first outer end cover 161, and the two have the same rotation frequency, and the second outer end cover 162 and the second output shaft 112 have different rotation frequencies, and the second output shaft 112 needs to be provided with a second bearing 1621 between the second outer end cover 162, so that there is a support between the second outer end cover 162 and the second output shaft 112, and the connection between the second outer end cover 162 and the second output shaft 112 is more stable.

[0068] Optionally, a second seal 1613 is further disposed outside the first bearing 1612 . The second seal 1613 is disposed at the first opening 1611 of the first outer end cover 161 , so as to increase the airtightness between the first outer end cover 161 and the first output shaft 111 .

[0069] The outer rotor hub motor 1 includes a brake 17 , which is respectively connected to the motor bracket 11 and the second output shaft 112 . The brake 17 can stop the rotation of the rotor mechanism 13 and other rotating mechanisms in time.

[0070] Specifically, the brake 17 includes a rotating member 171 and a fixed member 172, the rotating member 171 is connected to the second output shaft 112, a clamping structure is provided at the corresponding position of the second output shaft 112 and the rotating member 171, the second output shaft 112 is clamped with the rotating member 171, the fixed member 172 is connected to the motor bracket 11, and after the fixed member 172 is powered off, it is magnetically connected to the rotating member 171 through magnetic action. It can be understood that the fixed member 172 of the brake 17 absorbs the rotating member 171 after power is off to stop it from rotating, and the rotating member 171 rotates coaxially with the second output shaft 112, and can be absorbed when the motor is powered off to stop the rotation state of the second output shaft 112, the rotor mechanism 13, the first reduction mechanism 14, and the second reduction mechanism 15, so that the motor has a power-off braking function.

[0071] The outer rotor hub motor 1 includes a control module 18, which is respectively connected to the stator mechanism 12 and the brake 17, wherein the control module 18 supplies power to the stator. When the stator is energized, a magnetic field is generated, and the rotor rotates under the action of the magnetic field. The control module 18 also supplies power to the brake 17. The motor can operate normally only after the brake 17 is powered off.

[0072] The control module 18 includes a connecting wire 181, and the first output shaft 111 is hollow, and the connecting wire 181 extends outward from the hollow position of the first output shaft 111. It can be understood that the first output shaft 111 is hollow, and the connecting wire 181 supplies power to the stator mechanism 12 and the brake 17, and is transmitted from the first output shaft 111 to be electrically connected to the installed mechanism. In addition, the control module 18 is installed close to the stator mechanism 12, and a notch is set on the motor bracket 11 corresponding to the connecting wire 181 to allow the connecting wire 181 to pass through, thereby improving the utilization of space.

[0073] The first reduction mechanism 14 includes a first sun gear 141, at least three first planetary gears 142, and a first inner ring gear 143. The first planetary gear 142 is respectively meshed with the first sun gear 141 and the first inner ring gear 143. The first sun gear 141 is installed at the center of the motor bracket 11. The first sun gear 141 is connected to the second output shaft 112, and the first inner ring gear 143 is fixedly connected to the motor bracket 11.

[0074] Specifically, the motor bracket 11 is provided with a mounting groove 113, the first inner gear ring 143 is fixed in the mounting groove 113 of the motor bracket 11, the outer wall of the first inner gear ring 143 contacts the inner wall of the mounting groove 113, the first inner gear ring 143 and the motor bracket 11 are relatively stationary, the center line of the first sun gear 141 is on the center axis of the first inner gear ring 143, the first sun gear 141 is connected to the second output shaft 112, the second output shaft 112 and the first sun gear 141 are relatively stationary, the second output shaft 112 drives the first sun gear 141 to rotate, and the first The planetary gear 142 is arranged between the first sun gear 141 and the first inner ring gear 143. The first sun gear 141 drives the first planetary gear 142 to rotate. The first inner ring gear 143 is fixed. The first planetary gear 142 rotates around the first sun gear 141 along the circumference of the first inner ring gear 143. The first planetary gear 142 is provided with a first driving shaft 1421. The first driving shaft 1421 is connected to the second reduction mechanism 15 to provide driving force for the second reduction mechanism 15. The number of the first driving shafts 1421 corresponds to the number of the first planetary gears 142.

[0075] In the present embodiment, three first planetary gears 142 are provided, but the number of the first planetary gears 142 is not limited to three in the present embodiment, and four, five or more first planetary gears 142 may be provided.

[0076] As an embodiment, a gasket ring is set at the bottom of the mounting groove 113, one end of the first planetary gear 142 is connected to the second reduction mechanism 15, and the other end contacts the gasket ring. When the first planetary gear 142 is running, the wear of the first planetary gear 142 on the bottom of the mounting groove 113 can be reduced. It can be understood that the first planetary gear 142 is close to one end of the gasket ring, and the first drive shaft 1421 is flush with the first planetary gear 142, and at the other end, the first drive shaft 1421 protrudes from the first planetary gear 142 to connect to the second reduction mechanism 15.

[0077] As an embodiment, the first inner gear ring 143 can be fixedly connected to the mounting groove 113 by any method such as magnetic attraction, adhesion, and clamping.

[0078] The second reduction mechanism 15 includes a second sun gear 151, at least three second planetary gears 152, a second inner gear ring 153, and a gear carrier 154. The second planetary gears 152 are respectively meshed with the second sun gear 151 and the second inner gear ring 153.

[0079] The second sun gear 151 is connected to the first planetary gear 142 , the second planetary gear 152 is connected to the motor bracket 11 , the second inner gear ring 153 is connected to the first outer end cover 161 , and the gear frame 154 is fixedly connected to the motor bracket 11 .

[0080] The gear frame 154 is buckled on the motor bracket 11, and the gear frame 154 is provided with a gear groove 1543 matching the shape of the second planetary gear 152. The second planetary gear 152 is installed in the gear groove 1543. Since the gear frame 154 is buckled and installed, and the gear frame 154 and the motor bracket 11 are fixed by fasteners, the gear groove 1543 is blocked by the motor bracket 11, and the second planetary gear 152 rotates in the gear groove 1543. Each second planetary gear 152 is correspondingly provided with a second drive shaft 1521 and a drive bearing 1522. A fixing hole is provided in the center of the gear groove 1543 on the gear frame 154, and the second drive shaft 1521 is inserted into the fixing hole. The drive bearing 1522 is installed on the second drive shaft 1521, and the second planetary gear 152 is connected to the second drive shaft 1521. The inner ring of 22 matches the second drive shaft 1521, and the outer ring matches the second planetary gear 152, that is, the second drive shaft 1521 is inserted into the fixing hole, the inner ring of the driving bearing 1522 is sleeved on the second drive shaft 1521, and the second planetary gear 152 is sleeved on the outer ring of the driving bearing 1522, the second sun gear 151 is connected to the first planetary gear 142, the first planetary gear 142 provides driving force for the second sun gear 151, the second sun gear 151 drives the second planetary gear 152 to rotate, so that the second inner gear ring 153 meshing with the second planetary gear 152 rotates, the second inner gear ring 153 and the second sun gear 151 rotate around the central axis of the second sun gear 151, the second inner gear ring 153 is connected to the first outer end cover 161, and the rotation of the second inner gear ring 153 can drive the rotation of the first outer end cover 161.

[0081] The second sun gear 151 is provided with a connecting plate 1511, and connecting holes are provided on the connecting plate 1511. The number of the connecting holes corresponds to the number of the first drive shaft 1421, and the shape of the connecting holes matches the shape of the first drive shaft 1421. After the connecting plate 1511 and the first reduction mechanism 14 are installed, the first reduction mechanism 14 can drive the connecting plate 1511 to rotate. Since one end of the connecting plate 1511 is connected to the first reduction mechanism 14 and the second sun gear 151 is provided at the other end, the driving force of the first planetary gear 142 of the first reduction mechanism 14 can be transmitted to the second sun gear 151, thereby driving the second reduction mechanism 15 to operate.

[0082] As an embodiment, the gear rack 154 is fixedly connected to the second output shaft 112. The gear rack 154 is provided with a fixing column 1541 and a fixing position 1542. The second output shaft 112 is provided with a connecting position corresponding to the fixing position 1542. Both the fixing position 1542 and the connecting position are openings. The inner diameters of the two match the outer diameter of the fixing column 1541. The fixing column 1541 is inserted from the fixing position 1542 and the connecting position in sequence, so that the connection between the gear rack 154 and the second output shaft 112 is stable and the two are relatively stationary.

[0083] In a second aspect, the present invention discloses a lawn mower for mowing grass, the lawn mower comprising the outer rotor hub motor 1 described above.

[0084] Specifically, the first output shaft 111 of the outer rotor hub motor 1 is installed on the frame of the lawn mower, and the connecting shell 16 rotates relative to the first output shaft 111. The connecting shell 16 is connected to a rotating mechanism such as a blade. The connecting shell 16 provides driving force, and a two-stage reduction mechanism is arranged inside. The reduction mechanism has a planetary gear reduction structure, which can increase the reduction ratio, improve the output torque, and make the cutting power stronger.

[0085] It can be understood that an outer rotor hub motor 1 is used, and the connecting shell 16 is connected to the wheel hub of the lawn mower. Since the outer rotor hub motor 1 has a first reduction mechanism 14 and a second reduction mechanism 15, the reduction ratio is increased, the output torque of the motor is increased, and the efficiency of the motor is increased. It can adapt to different working conditions and has a stronger driving force, so that the lawn mower can obtain a stronger driving force and be more efficient when mowing.

[0086] Furthermore, a brake 17 is provided inside the outer rotor hub motor 1. The brake 17 can stop rotating when the power is cut off, and the connecting shell 16 and the rotating mechanism connected thereto can be stopped in time, thereby improving the safety of the lawn mower.

[0087] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0088] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0089] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0090] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be connected, detachably connected, or integrated; it can be mechanically connected or electrically connected; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0091] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0092] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms should not be understood as necessarily referring to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification.

[0093] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

[0094] The above is a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed by the present invention, and these modifications or replacements should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be based on the protection scope of the claims.

Claims

1. An outer rotor hub motor, characterized in that: It includes a first output shaft, a stator mechanism, a rotor mechanism, a first reduction mechanism, a second reduction mechanism and a connecting shell; The rotor mechanism is connected to the first reduction mechanism, the first reduction mechanism is connected to the second reduction mechanism, the second reduction mechanism is connected to the connection shell, the first output shaft is connected to the second reduction mechanism, and the first output shaft is connected to the connection shell; The stator mechanism, the rotor mechanism, the first reduction mechanism, and the second reduction mechanism are arranged in the connecting shell. The stator mechanism and the rotor mechanism rotate relative to each other. The first output shaft extends outward from the connecting shell, and the connecting shell rotates relative to the first output shaft.

2. The outer rotor hub motor according to claim 1, characterized in that: It includes a motor bracket and a second output shaft, wherein the motor bracket and the second output shaft are installed in the connecting shell; The first output shaft is connected to the second reduction mechanism, the second output shaft is connected to the motor bracket, the second output shaft is connected to the rotor mechanism, the first output shaft and the second output shaft are on the same straight line, and the first output shaft and the second output shaft pass through the center line of the motor bracket; The second output shaft rotates relative to the motor bracket and the first output shaft, and the motor bracket is respectively connected to the first reduction mechanism and the second reduction mechanism.

3. The outer rotor hub motor according to claim 1, characterized in that: The connecting shell comprises a first outer end cover and a second outer end cover, and the first outer end cover is buckled and connected with the second outer end cover; The first outer end cover is provided with a first opening, and the first output shaft extends outward from the first opening.

4. The outer rotor hub motor according to claim 3, characterized in that: It includes a first bearing and a second bearing, wherein the first bearing is respectively connected to the first outer end cover and the first output shaft; The second bearings are respectively connected to the second outer end cover and the second output shaft.

5. The outer rotor hub motor according to claim 1, characterized in that: A brake is included, and the brake is respectively connected to the motor bracket and the second output shaft.

6. The outer rotor hub motor according to claim 5, characterized in that: The brake comprises a rotating part and a fixed part, wherein the rotating part is connected to the second output shaft, and the fixed part is connected to the motor bracket. After the fixed part is energized, it is magnetically connected to the rotating part through magnetic action.

7. The outer rotor hub motor according to claim 1, characterized in that: The first reduction mechanism comprises a first sun gear, at least three first planetary gears, and a first inner gear ring, wherein the first planetary gears are respectively meshed with the first sun gear and the first inner gear ring; The first sun gear is installed at the center of the motor bracket, the first sun gear is connected to the second output shaft, and the first inner gear ring is fixedly connected to the motor bracket.

8. The outer rotor hub motor according to claim 1, characterized in that: The second reduction mechanism comprises a second sun gear, at least three second planetary gears, and a second inner gear ring, wherein the second planetary gears are respectively meshed with the second sun gear and the second inner gear ring; The second sun gear is connected to the first planetary gear, the second planetary gear is connected to the motor bracket, and the second inner gear ring is connected to the first outer end cover.

9. The outer rotor hub motor according to claim 1, characterized in that: It includes a control module, and the control module is respectively connected to the stator mechanism and the brake; The control module includes a connecting line, the first output shaft is hollow, and the connecting line extends out from the hollow position of the first output shaft.

10. A lawn mower, characterized in that: The invention comprises the outer rotor hub motor as described in any one of claims 1 to 9.

Images