Speed reducer, flywheel and moped

Abstract

The application relates to a reduction motor, a flywheel and a moped, and the reduction motor comprises a stator unit, a rotor unit, a primary sun gear unit, a primary planetary transmission unit, a double gear transmission unit and a wheel disc output unit. The rotor unit is used as the gear ring of the primary planetary reduction, the number of parts of the reduction structure can be reduced, the volume of the reduction motor can be effectively reduced, and the space utilization rate is improved; the double gear transmission unit rotates around the center and does not revolve around the transmission shaft unit, so that the sensor element can be arranged in the reduction motor, the failure of the sensor element caused by the cable problem is reduced, and the information transmission efficiency is improved; the double gear transmission unit and the wheel disc output unit are used as the final reduction structure of the reduction mechanism, the transmission ratio can be improved, the volume of the reduction motor can be reduced, the motor output shaft and the output shaft of the reduction mechanism are collinear, the volume of the reduction motor is reduced, and a larger transmission ratio can be realized in the relatively small space of the reduction motor.

Description

Technical Field

[0001] This invention relates to the field of geared motor technology for electric bicycles, and particularly to geared motors, flywheels, and electric bicycles. Background Technology

[0002] The power-assisted motor is the power source for vehicles that assist in transportation. The size, weight, and shape of the power-assisted motor have a significant impact on the layout of the vehicle. The gear ratio of the motor reduction affects the output torque of the motor, thus affecting the performance of the motor.

[0003] The motors in existing power-assisted mobility devices fall into the following two categories: 1) The first type is where the output shaft of the motor and the output shaft of the reduction mechanism are not on the same straight line. The reduction mechanism outputs power after multiple stages of reduction. This type of motor has a complex shape and a small reduction ratio. In addition, this type of motor is generally larger and heavier. Since the space near the drive shaft of transportation equipment is often limited, its arrangement is more difficult. Under the same volume, the output torque of the motor is smaller, which affects the performance of the motor.

[0004] 2) The second type is where the output shaft of the motor and the output shaft of the reduction mechanism are on the same straight line. The shape is relatively simple, but the space is limited and it is difficult to achieve a large transmission ratio. Since all planetary reduction gears are used, the internal parts are basically moving parts, and the information transmission of internal sensing components is difficult. The rotor of the motor is not a component of the reduction mechanism, so the volume is relatively large.

[0005] Therefore, existing motors have the following disadvantages: 1) The output shaft of the motor and the output shaft of the reduction mechanism are not on the same straight line, the shape is complicated, it is not easy to arrange, and the weight is heavy; 2) The rotor of the motor is not part of the reduction mechanism, which increases the number of parts, costs, and the size of the reduction mechanism; 3) The use of planetary deceleration throughout makes it impossible to place sensor components and makes information transmission difficult; 4) Using planetary gear reducers throughout can easily lead to a large motor size and a small transmission ratio.

[0006] Currently, no effective solutions have been proposed for the problems existing in related technologies, such as the motor output shaft and the output shaft of the reduction mechanism not being collinear, the rotor of the motor not participating in the transmission of the reduction mechanism, the large size and weight of the motor, the difficulty in placing sensor components, the difficulty in information transmission, and the small transmission ratio. Summary of the Invention

[0007] The purpose of this invention is to address the shortcomings of existing technologies by providing a geared motor, flywheel, and electric bicycle, thereby solving problems such as the motor output shaft and the output shaft of the reduction mechanism not being collinear, the rotor of the motor not participating in the transmission of the reduction mechanism, large motor size, large motor weight, difficulty in placing sensor elements, difficulty in information transmission, and small transmission ratio.

[0008] To achieve the above objectives, the technical solution adopted by the present invention is as follows: In a first aspect, a geared motor is provided, comprising: Stator unit; A rotor unit, which is coaxially disposed inside the stator unit; A first-stage sun gear unit, which is coaxially disposed inside the rotor unit; A primary planetary transmission unit is coaxially disposed inside the rotor unit and coaxially disposed outside the primary sun gear unit, and is respectively connected to the rotor unit and the primary sun gear unit for rotating under the action of the rotor unit and the primary sun gear unit; A plurality of double gear transmission units are arranged around the first end of the first-stage planetary transmission unit, and the large-diameter ends of the plurality of double gear transmission units are respectively connected to the first-stage planetary transmission unit for rotation under the action of the first-stage planetary transmission unit. A wheel output unit is coaxially arranged with the first-stage planetary transmission unit. The second end of the wheel output unit is connected to the small-diameter end of several double-gear transmission units. The first end of the wheel output unit is connected to a flywheel and is used to drive the flywheel to rotate under the action of several double-gear transmission units.

[0009] In some of these embodiments, it also includes: At least one fixed unit is coaxially disposed outside the first-stage planetary transmission unit and is connected to several of the double-gear transmission units respectively. At least one or two planetary transmission units are provided. The two-stage planetary transmission units are coaxially arranged with the first-stage planetary transmission unit and the fixed unit, respectively. The second end of the two-stage planetary transmission unit is connected to the first end of the first-stage planetary transmission unit and the fixed unit, respectively. The first end of the two-stage planetary transmission unit is connected to the large-diameter end of a plurality of double-gear transmission units, respectively. The two-stage planetary transmission units are used to rotate under the action of the first-stage planetary transmission unit and the fixed unit to drive the plurality of double-gear transmission units to rotate.

[0010] In some of these embodiments, it also includes: A control unit is located inside the geared motor and is communicatively connected to the stator unit for controlling the geared motor.

[0011] In some of these embodiments, it also includes: A drive shaft unit is coaxially arranged with the first-stage sun gear unit, the first-stage planetary transmission unit, and the wheel output unit, and both ends of the drive shaft unit are connected to the pedals.

[0012] In some of these embodiments, it also includes: A unidirectional rotation unit is provided, which is coaxially arranged with the wheel output unit and is used for the unidirectional movement of the wheel output unit.

[0013] In some of these embodiments, it also includes: A torque monitoring unit is coaxially disposed inside the wheel output unit and is used to monitor torque.

[0014] In some of these embodiments, it also includes: The housing unit contains the stator unit, the rotor unit, the first-stage sun gear unit, the first-stage planetary transmission unit, several double-gear transmission units, and the wheel output unit.

[0015] In some of these embodiments, it also includes: A mounting bracket unit is disposed outside the geared motor and is used to mount the geared motor onto the electric bicycle.

[0016] In a second aspect, a flywheel is provided for connection to a geared motor as described in the first aspect, comprising: The mounting unit is connected to the first end of the wheel output unit of the geared motor; A flywheel unit, wherein the flywheel unit is disposed in the mounting unit.

[0017] In some of these embodiments, it also includes: A protection unit is disposed in the mounting unit and is used to protect the flywheel unit.

[0018] Thirdly, a power-assisted bicycle is provided, including: The geared motor as described in the first aspect.

[0019] Fourthly, a power-assisted bicycle is provided, comprising: The geared motor as described in the first aspect; As described in the second aspect, the flywheel.

[0020] The present invention adopts the above technical solution and has the following technical effects compared with the prior art: The present invention relates to a geared motor, flywheel, and electric bicycle. The rotor unit has a first transmission gear element on its inner edge surface, which serves as the gear ring of a first-stage planetary reducer. This reduces the number of components in the reduction structure, effectively shrinking the size of the geared motor and improving space utilization. The use of a double-gear transmission unit that rotates independently rather than revolving around a transmission shaft unit facilitates the placement of sensor elements inside the geared motor, reducing sensor failures due to cable issues and improving information transmission efficiency. Utilizing the double-gear transmission unit and the wheel output unit as the final stage of the reduction mechanism increases the transmission ratio and reduces the size of the geared motor. The motor output shaft and the reduction mechanism output shaft are collinear, further reducing the geared motor's size. A large transmission ratio is achieved within a relatively small geared motor space. The transmission shaft unit ensures that the output shafts of the geared motor and the reduction mechanism are collinear, further reducing the geared motor's size. A unidirectional rotation unit enables unidirectional rotation of the wheel output unit, avoiding the application of reverse torque to the geared motor. A torque monitoring unit monitors the torque of the transmission shaft unit, thereby changing the reduction ratio of the geared motor and assisting the electric bicycle user in actions such as climbing hills. Attached Figure Description

[0021] Figure 1 a~ Figure 1 b is a schematic diagram of a geared motor according to an embodiment of the present invention; Figure 2 a is a sectional view of the longitudinal section of the geared motor according to an embodiment of the present invention; Figure 2 b~2e are cross-sectional views of the geared motor according to an embodiment of the present invention; Figure 3 a~ Figure 3 b is a schematic diagram and cross-sectional view of a rotor unit according to an embodiment of the present invention; Figure 4 a~ Figure 4 b is a schematic diagram and cross-sectional view of a first-stage sun gear unit according to an embodiment of the present invention; Figure 5 a~ Figure 5 b is a schematic diagram and cross-sectional view of a first-stage planetary transmission unit according to an embodiment of the present invention; Figure 6 a~ Figure 6 b is a schematic diagram and cross-sectional view of a double gear transmission unit according to an embodiment of the present invention; Figure 7 a~ Figure 7 b is a schematic diagram and cross-sectional view of the roulette output unit according to an embodiment of the present invention; Figure 8 a~ Figure 8b is a schematic diagram and cross-sectional view of the fixing unit according to an embodiment of the present invention; Figure 9 a~ Figure 9 b is a schematic diagram and cross-sectional view of a two-stage planetary transmission unit according to an embodiment of the present invention; Figure 10 This is a schematic diagram of a control unit according to an embodiment of the present invention; Figure 11 a~ Figure 11 b is a schematic diagram and cross-sectional view of the transmission shaft unit according to an embodiment of the present invention; Figure 12 This is a schematic diagram of a unidirectional rotation unit according to an embodiment of the present invention; Figure 13 a~ Figure 13 b is a schematic diagram and cross-sectional view of the outer casing unit according to an embodiment of the present invention; Figure 14 a~ Figure 14 b is a schematic diagram and cross-sectional view of a flywheel according to an embodiment of the present invention; Figure 15 a~ Figure 15 b is a schematic diagram and cross-sectional view of the assembly state of the geared motor and flywheel according to an embodiment of the present invention.

[0022] The reference numerals in the attached figures are as follows: 1000, geared motor; 1010, stator unit; 1020, rotor unit; 1021, rotor element; 1022, placement slot element; 1023, first transmission gear element; 1024, magnetic element; 1025, first bearing element; 1030, first-stage sun gear unit; 1031, sun carrier element; 1032, first sun gear element; 1033, second bearing element; 1040, first-stage planetary transmission unit; 1041, first planet carrier element; 1042, second sun gear element; 1043, first planetary shaft element; 1044, first planetary gear element; 1045, third bearing element; 1046, first washer element; 1047, second washer element; 1050, double gear transmission unit; 1051, double gear shaft element; 1052, large-end gear element; 1053, small-end gear element; 1 054. Fourth bearing element; 1055. Bushing element; 1060. Wheel output unit; 1061. First wheel output element; 1062. Second transmission gear element; 1063. Second wheel output element; 1064. Connecting element; 1065. Fifth bearing element; 1066. Sixth bearing element; 1067. Seventh bearing element; 1068. Third washer element; 1069. Fourth washer element; 1070. Fixing unit; 1071. Fixing bracket element; 1072. Third transmission gear element; 1073. Eighth bearing element; 1080. Second-stage planetary transmission unit; 1081. Second planetary carrier element; 1082. Third sun gear element; 1083. Second planetary shaft element; 1084. Second planetary gear element; 1085. Ninth bearing element; 1090. Control unit; 1091. Mounting bracket element; 1092. Control element; 1100, Drive shaft unit; 1101, Male shaft element; 1102, Female shaft element; 1110, One-way rotation unit; 1111, First one-way rotation element; 1112, Second one-way rotation element; 1120, Torque monitoring unit; 1130, Housing unit; 1131, First housing element; 1132, Second housing element; 1133, Sealing element; 1140, Hanger unit; 2000, Flywheel; 2010, Mounting Unit; 2020, Flywheel Unit; 2030, Protection Unit. Detailed Implementation

[0023] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other.

[0025] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, but this is not intended to limit the scope of the invention.

[0026] Example 1 This embodiment relates to the geared motor of the present invention.

[0027] like Figure 1 a~ Figure 1 b、 Figure 2 a~ Figure 2 As shown in Figure e, a geared motor 1000 includes a stator unit 1010, a rotor unit 1020, a first-stage sun gear unit 1030, a first-stage planetary transmission unit 1040, several double-gear transmission units 1050, and a wheel output unit 1060. The rotor unit 1020 is coaxially disposed inside the stator unit 1010; the first-stage sun gear unit 1030 is coaxially disposed inside the rotor unit 1020; the first-stage planetary transmission unit 1040 is coaxially disposed inside the rotor unit 1020 and coaxially disposed outside the first-stage sun gear unit 1030, and is respectively connected to the rotor unit 1020 and the first-stage sun gear unit 1030 for rotation under the action of the rotor unit 1020 and the first-stage sun gear unit 1030; the several double-gear transmission units 1050 surround the first-stage planetary transmission unit 1060. The first end of the unit 1040 is configured such that the large-diameter ends of several double-gear transmission units 1050 are respectively connected to the first-stage planetary transmission unit 1040 for rotation under the action of the first-stage planetary transmission unit 1040; the wheel output unit 1060 is coaxially configured with the first-stage planetary transmission unit 1040, the second end of the wheel output unit 1060 is respectively connected to the small-diameter ends of several double-gear transmission units 1050, and the first end of the wheel output unit 1060 is connected to the flywheel for driving the flywheel to rotate under the action of several double-gear transmission units 1050.

[0028] Preferably, the number of double gear transmission units 1050 is at least three. Generally, the number of double gear transmission units 1050 is selected adaptively according to the size and specifications of the geared motor.

[0029] The working principle of this invention is as follows: Under the action of the stator unit 1010, the rotor unit 1020 rotates; since the first-stage sun gear unit 1030 is fixed, under the action of the rotor unit 1020 and the first-stage sun gear unit 1030, the first-stage planetary transmission unit 1040 rotates; since several double-gear transmission units 1050 are fixedly installed on the geared motor 1000, under the action of the first-stage planetary transmission unit 1040, the several double-gear transmission units 1050 rotate, thereby driving the wheel output unit 1060 to rotate, thus realizing the speed change function.

[0030] In some of these embodiments, the stator unit 1010 is an electronic stator.

[0031] like Figure 3 a~ Figure 3 As shown in Figure b, the rotor unit 1020 includes a rotor element 1021, a plurality of placement slot elements 1022, a first transmission gear element 1023, and a plurality of magnetic elements 1024. The rotor element 1021 is coaxially disposed inside the stator unit 1010; the plurality of placement slot elements 1022 are arranged around the outer edge surface of the rotor element 1021; the first transmission gear element 1023 is disposed on the inner edge surface of the rotor element 1021 and is connected to the first-stage planetary transmission unit 1040 for transmission, and is used to cooperate with the first-stage sun gear unit 1030 to rotate the first-stage planetary transmission unit 1040; the plurality of magnetic elements 1024 are disposed inside the corresponding placement slot elements 1022, and are used to drive the rotor element 1021 to rotate under the action of the stator unit 1010.

[0032] Generally, the outer diameter of the rotor element 1021 is smaller than the inner diameter of the stator unit 1010, and the axial dimension of the rotor element 1021 is not greater than the axial dimension of the stator unit 1010.

[0033] In some of these embodiments, rotor element 1021 is a motor rotor.

[0034] The two adjacent placement slot elements 1022 are not connected to each other.

[0035] In some of these embodiments, the cross-section of the placement slot element 1022 is rectangular or T-shaped.

[0036] In some of these embodiments, there are eight placement slot elements 1022.

[0037] Generally, the axial dimension of the first transmission gear element 1023 is not greater than the axial dimension of the rotor element 1021. Preferably, the axial dimension of the first transmission gear element 1023 is smaller than the axial dimension of the rotor element 1021.

[0038] In some embodiments, when the axial dimension of the first transmission gear element 1023 is smaller than the axial dimension of the rotor element 1021, the first end of the first transmission gear element 1023 is located inside the rotor element 1021, and the second end of the first transmission gear element 1023 is located inside the rotor element 1021. Here, the first end and the second end of the first transmission gear element 1023 refer to the two ends of the first transmission gear element 1023 in the axial direction.

[0039] In some of these embodiments, the first transmission gear element 1023 is a first internal gear ring.

[0040] Generally, the axial dimension of the magnetic element 1024 is not greater than the axial dimension of the placement slot element 1022, the width of the magnetic element 1024 is not greater than the width of the placement slot element 1022, and the length of the magnetic element 1024 is not greater than the length of the placement slot element 1022.

[0041] The number of magnetic elements 1024 matches the number of placement slot elements 1022. Generally, the number of magnetic elements 1024 is equal to the number of placement slot elements 1022.

[0042] In some of these embodiments, the magnetic element 1024 is a high-strength magnet.

[0043] In some embodiments, the rotor unit 1020 further includes a first bearing element 1025. The first bearing element 1025 is disposed between the rotor element 1021 and the first-stage planetary transmission unit 1040, and is connected to the rotor element 1021 and the first-stage planetary transmission unit 1040, respectively.

[0044] In some embodiments, there are multiple first bearing elements 1025. The multiple first bearing elements 1025 are spaced apart along the axial direction of the rotor element 1021.

[0045] In some embodiments, there are two first bearing elements 1025. One first bearing element 1025 is disposed at the second end inside the rotor element 1021 (i.e., the second end of the first transmission gear element 1023), and the other first bearing element 1025 is disposed at the first end inside the rotor element 1021 (i.e., the first end of the first transmission gear element 1023).

[0046] The outer diameter of the first bearing element 1025 is not greater than the inner diameter of the rotor element 1021, and the axial dimension of the first bearing element 1025 is smaller than the axial dimension of the rotor element 1021.

[0047] In some of these embodiments, the first bearing element 1025 includes, but is not limited to, a deep groove bearing.

[0048] like Figure 4a~ Figure 4 As shown in Figure b, the first-stage sun gear unit 1030 includes a sun carrier element 1031 and a first sun gear element 1032. The sun carrier element 1031 is coaxially disposed inside the rotor unit 1020; the first sun gear element 1032 is disposed at the first end of the sun carrier element 1031 and is connected to the first-stage planetary transmission unit 1040 for transmission, and is used to cooperate with the rotor unit 1020 to make the first-stage planetary transmission unit 1040 rotate.

[0049] Specifically, the solar carrier element 1031 is coaxially disposed inside the rotor element 1021.

[0050] Generally, the solar carrier element 1031 and the first solar gear element 1032 are integrally formed.

[0051] The solar panel element 1031 is a hollow, axisymmetric structure. Generally, the cross-section of the solar panel element 1031 is convex.

[0052] The solar frame element 1031 includes at least a first outer diameter and a second outer diameter. The first outer diameter is the outer diameter of the second end of the solar frame element 1031; the second outer diameter is the outer diameter of the first end of the solar frame element 1031, and the second outer diameter is smaller than the first outer diameter. Furthermore, the solar frame element 1031 also includes a third outer diameter. The third outer diameter is the outer diameter of the middle portion of the solar frame element 1031 near the second end, and the third outer diameter is larger than both the first and second outer diameters.

[0053] The solar frame element 1031 includes at least a first inner diameter and a second inner diameter. The first inner diameter is the inner diameter of the second end of the solar frame element 1031; the second inner diameter is the inner diameter of the first end of the solar frame element 1031, and the second inner diameter is smaller than the first inner diameter.

[0054] The solar panel element 1031 includes at least a first axial dimension and a second axial dimension. The first axial dimension is the axial dimension of the second end of the solar panel element 1031; the second axial dimension is the axial dimension of the first end of the solar panel element 1031, and the second axial dimension is greater than the first axial dimension.

[0055] In some of these embodiments, the sun carrier element 1031 is a primary sun gear carrier.

[0056] The inner diameter of the first sun gear element 1032 is equal to the second outer diameter of the sun carrier element 1031, the outer diameter of the first sun gear element 1032 is smaller than the first outer diameter of the sun carrier element 1031, and the axial dimension of the first sun gear element 1032 is not greater than the second axial dimension of the sun carrier element 1031. The outer diameter of the first sun gear element 1032 is smaller than the inner diameter of the rotor element 1021. The axial dimension of the first sun gear element 1032 is not greater than the axial dimension of the first transmission gear element 1023.

[0057] In some of these embodiments, the first sun gear element 1032 is a first-stage sun gear.

[0058] In some embodiments, the primary sun gear unit 1030 further includes a second bearing element 1033. The second bearing element 1033 is disposed between the sun carrier element 1031 and the drive shaft unit of the geared motor 1000, and is connected to the sun carrier element 1031 and the drive shaft unit, respectively.

[0059] The outer diameter of the second bearing element 1033 is not greater than the first inner diameter of the sun frame element 1031.

[0060] In some of these embodiments, the second bearing element 1033 includes, but is not limited to, a deep groove bearing.

[0061] In some embodiments, the primary sun gear unit 1030 further includes a plurality of first mounting elements. The plurality of first mounting elements are arranged around the sun carrier element 1031 for mounting the sun carrier element 1031 to the housing unit of the geared motor 1000.

[0062] Generally, there are at least three first mounting elements.

[0063] In some of these embodiments, the first mounting element includes, but is not limited to, mounting screw holes for mounting screws, bolts, etc.

[0064] like Figure 5 a~ Figure 5 As shown in b, the first-stage planetary transmission unit 1040 includes a first planet carrier element 1041, a second sun gear element 1042, a plurality of first planet shaft elements 1043, and a plurality of first planetary gear elements 1044. The first planet carrier element 1041 is coaxially disposed between the rotor unit 1020 and the first-stage sun gear unit 1030; the second sun gear element 1042 is disposed at the first end of the first planet carrier element 1041 and is respectively connected to a plurality of double-gear transmission units 1050 for driving the plurality of double-gear transmission units 1050 to rotate under the action of the first planet carrier element 1041; the plurality of first planet shaft elements 1043 are arranged around the first planet carrier element 1041; the plurality of first planetary gear elements 1044 are coaxially disposed on the corresponding first planet shaft elements 1043 and are respectively connected to the rotor unit 1020 and the first-stage sun gear unit 1030 for driving the first planet carrier element 1041 to rotate under the action of the rotor unit 1020 and the first-stage sun gear unit 1030.

[0065] Specifically, the first planetary carrier element 1041 is coaxially disposed between the rotor element 1021 and the first sun gear element 1032; a plurality of first planetary gear elements 1044 respectively mesh with the first transmission gear element 1023 and the first sun gear element 1032, and are used to drive the first planetary carrier element 1041 to rotate under the action of the first transmission gear element 1023 and the first sun gear element 1032.

[0066] Generally, the first planetary carrier element 1041 and the second sun gear element 1042 are integrally formed.

[0067] Generally, the second end of the first planetary carrier element 1041 is located inside the rotor element 1021, and the first end of the first planetary carrier element 1041 is located outside the rotor element 1021.

[0068] The first planetary carrier element 1041 is a hollow, axisymmetric structure. Generally, the cross-section of the first planetary carrier element 1041 is convex.

[0069] The outer diameter of the first planetary carrier element 1041 is smaller than the inner diameter of the rotor element 1021.

[0070] The first planetary carrier element 1041 includes at least a first outer diameter and a second outer diameter. The first outer diameter is the outer diameter of the second end of the first planetary carrier element 1041; the second outer diameter is the outer diameter of the first end of the first planetary carrier element 1041, and the second outer diameter is smaller than the first outer diameter. Further, the first planetary carrier element 1041 also includes a third outer diameter. The third outer diameter is the outer diameter of the middle portion of the first planetary carrier element 1041 near the second end, and the third outer diameter is larger than both the first and second outer diameters. Even further, the first planetary carrier element 1041 also includes a fourth outer diameter. The fourth outer diameter is the outer diameter of the middle portion of the first planetary carrier element 1041 near the first end, and the fourth outer diameter is larger than the second outer diameter and smaller than the third outer diameter.

[0071] The first planetary carrier element 1041 includes at least a first inner diameter and a second inner diameter. The first inner diameter is the inner diameter of the second end of the first planetary carrier element 1041; the second inner diameter is the inner diameter of the first end of the first planetary carrier element 1041, and the second inner diameter is smaller than the first inner diameter. Further, the inner diameter of the first planetary carrier element 1041 also includes a third inner diameter. The third inner diameter is the inner diameter of the middle portion of the first planetary carrier element 1041, and the third inner diameter is smaller than the first inner diameter and larger than the second inner diameter.

[0072] The first planetary carrier element 1041 includes at least a first axial dimension and a second axial dimension. The first axial dimension is the axial dimension of the second end of the first planetary carrier element 1041; the second axial dimension is the axial dimension of the first end of the first planetary carrier element 1041, and the second axial dimension is greater than the first axial dimension. Further, the axial dimension of the first planetary carrier element 1041 also includes a third axial dimension. The third axial dimension is the axial dimension of the middle portion of the first planetary carrier element 1041, and the third axial dimension is greater than the first axial dimension and smaller than the second axial dimension.

[0073] In some embodiments, the first planetary carrier element 1041 includes a first planetary carrier, a plurality of first cavities, a plurality of first rotating holes, and a plurality of second rotating holes. The first planetary carrier is coaxially disposed between the rotor element 1021 and the first sun gear element 1032, and a second sun gear element 1042 is disposed on the outer edge of the first end of the first planetary carrier. The plurality of first cavities surround the first planetary carrier and are used to accommodate a plurality of first planetary gear elements 1044. The plurality of first rotating holes surround the first planetary carrier and communicate with corresponding first cavities and are connected to corresponding first planetary shaft elements 1043. The plurality of second rotating holes surround the first planetary carrier and communicate with corresponding first cavities and are connected to corresponding first planetary shaft elements 1043.

[0074] The radial dimension (e.g., inner diameter) of the first rotating hole is smaller than the radial dimension (e.g., length, width, etc.) of the first cavity; the radial dimension (e.g., inner diameter) of the second rotating hole is smaller than the radial dimension (e.g., length, width, etc.) of the first cavity; the radial dimension (e.g., inner diameter) of the second rotating hole is equal to the radial dimension (e.g., inner diameter) of the first rotating hole.

[0075] The number of first cavities, the number of first rotating holes, and the number of second rotating holes are equal, that is, the first cavities, the first rotating holes, and the second rotating holes correspond one-to-one.

[0076] The inner diameter of the second sun gear element 1042 is equal to the second outer diameter of the first planetary carrier element 1041, the outer diameter of the second sun gear element 1042 is smaller than the first outer diameter of the first planetary carrier element 1041, and the axial dimension of the second sun gear element 1042 is not greater than the second axial dimension of the first planetary carrier element 1041.

[0077] In some of these embodiments, the second sun gear element 1042 is a secondary sun gear.

[0078] In some of these embodiments, the first planetary shaft element 1043 is rotatably connected to the first rotating hole and the second rotating hole, respectively.

[0079] In some of these embodiments, the first planetary shaft element 1043 does not rotate relative to the first rotating hole and the second rotating hole, respectively.

[0080] The number of first planetary shaft elements 1043 is equal to the number of first rotating holes (second rotating holes).

[0081] In some embodiments, the axial dimension of the first planetary shaft element 1043 is smaller than the sum of the axial dimensions of the first rotating hole, the first cavity, and the second rotating hole.

[0082] In some of these embodiments, the first planetary shaft element 1043 is a first-stage planetary drive shaft.

[0083] The outer edge of the first planetary gear element 1044 protrudes from the first planet carrier element 1041.

[0084] In some embodiments, the first planetary gear element 1044 and the first planetary shaft element 1043 are integrally formed. That is, the first planetary shaft element 1043 rotates along with the first planetary gear element 1044.

[0085] In some embodiments, the first planetary gear element 1044 is rotatably connected to the first planetary shaft element 1043. That is, the first planetary shaft element 1043 remains stationary, while the first planetary gear element 1044 rotates about the first planetary shaft element 1043.

[0086] The number of first planetary gear elements 1044 is equal to the number of first planetary shaft elements 1043.

[0087] The inner diameter of the first planetary gear element 1044 is not less than the outer diameter of the first planetary shaft element 1043, and the axial dimension of the first planetary gear element 1044 is less than the axial dimension of the first planetary shaft element 1043.

[0088] The outer diameter of the first planetary gear element 1044 is greater than the difference between the third outer diameter and the third inner diameter of the first planetary carrier element 1041. The axial dimension of the first planetary gear element 1044 is not greater than the axial dimension of the first cavity. The axial dimension of the first planetary gear element 1044 is not greater than the axial dimension of the first transmission gear element 1023. The axial dimension of the first planetary gear element 1044 is less than the axial dimension of the first transmission gear element 1023. The axial dimension of the first planetary gear element 1044 is not greater than the axial dimension of the first sun gear element 1032.

[0089] In some of these embodiments, the first planetary gear element 1044 is a first-stage planetary gear.

[0090] In some embodiments, the primary planetary transmission unit 1040 further includes a third bearing element 1045. The third bearing element 1045 is disposed between the first planetary carrier element 1041 and the primary sun gear unit 1030, and is connected to both the first planetary carrier element 1041 and the primary sun gear unit 1030.

[0091] Specifically, the third bearing element 1045 is disposed between the first planetary carrier element 1041 and the sun carrier element 1031, and is connected to the first planetary carrier element 1041 and the sun carrier element 1031 respectively.

[0092] The outer diameter of the third bearing element 1045 is not greater than the first inner diameter of the first planetary carrier element 1041. The inner diameter of the third bearing element 1045 is not less than the second outer diameter of the sun carrier element 1031.

[0093] In some of these embodiments, the third bearing element 1045 includes, but is not limited to, a deep groove bearing.

[0094] In some embodiments, the primary planetary transmission unit 1040 further includes a first washer element 1046. The first washer element 1046 is disposed at the second end of the first planetary carrier element 1041.

[0095] Furthermore, the first washer element 1046 is located on the outer edge surface of the first planetary carrier element 1041, which has a first outer diameter.

[0096] Furthermore, the first washer element 1046 contacts the first bearing element 1025.

[0097] In some of these embodiments, the first washer element 1046 includes, but is not limited to, a wear-resistant washer and a retaining ring.

[0098] In some embodiments, the primary planetary transmission unit 1040 further includes a second washer element 1047. The second washer element 1047 is disposed at a first end of the first planetary carrier element 1041.

[0099] Furthermore, the second washer element 1047 is located on the outer edge surface of the first planetary carrier element 1041, which has a fourth outer diameter.

[0100] Furthermore, the second washer element 1047 contacts the first bearing element 1025.

[0101] In some of these embodiments, the second washer element 1047 includes, but is not limited to, wear-resistant washers and retaining rings.

[0102] like Figure 6 a~ Figure 6As shown in Figure b, the double gear transmission unit 1050 includes a double gear shaft element 1051, a large-end gear element 1052, and a small-end gear element 1053. The double gear shaft element 1051 is fixedly disposed inside the geared motor 1000; the large-end gear element 1052 is coaxially disposed on the double gear shaft element 1051 and is connected to the first end of the primary planetary transmission unit 1040 for rotation under the action of the primary planetary transmission unit 1040; the small-end gear element 1053 is coaxially disposed on the double gear shaft element 1051 and fixedly connected to the large-end gear element 1052, and is connected to the wheel output unit 1060 for driving the wheel output unit 1060 to rotate under the action of the large-end gear element 1052.

[0103] Specifically, the large-end gear element 1052 meshes with the second sun gear element 1042.

[0104] The large-end gear element 1052 and the small-end gear element 1053 rotate around the double-gear shaft element 1051.

[0105] Generally, the large-end gear element 1052 and the small-end gear element 1053 are integrally formed to form a double gear.

[0106] The double gear shaft element 1051 is fixed to the geared motor by means including but not limited to bolt connection, screw connection, etc.

[0107] In some of these embodiments, the double gear shaft element 1051 is a planetary shaft.

[0108] The inner diameter of the large-end gear element 1052 is not less than the outer diameter of the double gear shaft element 1051, and the axial dimension (such as thickness and height) of the large-end gear element 1052 is less than the axial dimension (such as length) of the double gear shaft element 1051.

[0109] In some of these embodiments, the large-end gear element 1052 is the large-diameter end gear of a double gear.

[0110] The inner diameter of the small-end gear element 1053 is not less than the outer diameter of the double-gear shaft element 1051, and the axial dimension (such as thickness and height) of the small-end gear element 1053 is less than the axial dimension (such as length) of the double-gear shaft element 1051. The outer diameter of the small-end gear element 1053 is less than the outer diameter of the large-end gear element 1052.

[0111] Generally, the axial dimension of the double gear shaft element 1051 is greater than or equal to the axial dimension of the large-end gear element 1052 plus the axial dimension of the small-end gear element 1053.

[0112] In some of these embodiments, the small-end gear element 1053 is the small-diameter end gear of a double gear.

[0113] In some embodiments, the double gear transmission unit 1050 further includes a fourth bearing element 1054. The fourth bearing element 1054 is disposed between the double gear shaft element 1051 and the large-end gear element 1052, and is connected to the double gear shaft element 1051 and the large-end gear element 1052 respectively.

[0114] The fourth bearing element 1054 is sleeved on the second end of the double gear shaft element 1051 and located inside the large end gear element 1052.

[0115] The inner diameter of the fourth bearing element 1054 is equal to the outer diameter of the second end of the double gear shaft element 1051, and the axial dimension of the fourth bearing element 1054 is smaller than the axial dimension of the double gear shaft element 1051. The outer diameter of the fourth bearing element 1054 is equal to the inner diameter of the large-end gear element 1052, and the axial dimension of the fourth bearing element 1054 is smaller than the axial dimension of the large-end gear element 1052.

[0116] In some of these embodiments, the fourth bearing element 1054 includes, but is not limited to, a deep groove bearing.

[0117] In some embodiments, the double gear transmission unit 1050 further includes a bushing element 1055. The bushing element 1055 is configured to sleeve the double gear shaft element 1051.

[0118] The bushing element 1055 is sleeved on the first end of the double gear shaft element 1051 and is located inside the small end gear element 1053.

[0119] The bushing element 1055 is detachably connected to the double gear shaft element 1051, including but not limited to screw connection.

[0120] The inner diameter of the bushing element 1055 is equal to the outer diameter of the first end of the double gear shaft element 1051, and the axial dimension of the bushing element 1055 is smaller than the axial dimension of the double gear shaft element 1051. The outer diameter of the bushing element 1055 is equal to the inner diameter of the first end of the small end gear element 1053, and the axial dimension of the bushing element 1055 is smaller than the axial dimension of the small end gear element 1053.

[0121] In some of these embodiments, bushing element 1055 is a bushing.

[0122] like Figure 7 a~ Figure 7As shown in Figure b, the wheel output unit 1060 includes a first wheel output element 1061, a second transmission gear element 1062, a second wheel output element 1063, and a connecting element 1064. The first wheel output element 1061 is coaxially arranged with the first-stage planetary transmission unit; the second transmission gear element 1062 is disposed on the inner edge surface of the second end of the first wheel output element 1061 and is respectively connected to the small-diameter ends of several double-gear transmission units 1050, driving the first wheel output element 1061 to rotate under the action of the several double-gear transmission units 1050; the second wheel output element 1063 is connected to the first wheel output element 1061 and is used to rotate under the action of the first wheel output element 1061; the connecting element 1064 is disposed at the first end of the second wheel output element 1063 and is connected to a flywheel, driving the flywheel to rotate under the action of the second wheel output element 1063.

[0123] Specifically, the first wheel output element 1061 is coaxially arranged with the first planetary carrier element 1041; the second transmission gear element 1062 meshes with several large-end gear elements 1052 respectively.

[0124] Generally, the first wheel output element 1061 and the second transmission gear element 1062 are integrally formed.

[0125] Generally, the second wheel output element 1063 and the connecting element 1064 are integrally formed.

[0126] The first wheel output element 1061 is a hollow, axisymmetric structure. Generally, the cross-section of the first wheel output element 1061 is convex.

[0127] The first wheel output element 1061 includes at least a first outer diameter and a second outer diameter. The first outer diameter is the outer diameter of the second end of the first wheel output element 1061; the second outer diameter is the outer diameter of the first end of the first wheel output element 1061, and the second outer diameter is smaller than the first outer diameter.

[0128] The first wheel output element 1061 includes at least a first inner diameter and a second inner diameter. The first inner diameter is the inner diameter of the second end of the first wheel output element 1061; the second inner diameter is the inner diameter of the first end of the first wheel output element 1061, and the second inner diameter is smaller than the first inner diameter. Further, the first wheel output element 1061 also includes a third inner diameter. The third inner diameter is the inner diameter of the middle portion of the first wheel output element 1061, and the third inner diameter is smaller than the first inner diameter and larger than the second inner diameter.

[0129] The first wheel output element 1061 includes at least a first axial dimension and a second axial dimension. The first axial dimension is the axial dimension of the second end of the first wheel output element 1061; the second axial dimension is the axial dimension of the first end of the first wheel output element 1061, and the second axial dimension is greater than the first axial dimension.

[0130] In some of these embodiments, the first wheel output element 1061 is the first wheel output.

[0131] The axial dimension of the second transmission gear element 1062 is not greater than the first axial dimension of the first wheel output element 1061.

[0132] In some of these embodiments, the second transmission gear element 1062 is a second internal gear ring.

[0133] The second wheel output element 1063 is a hollow, axisymmetric structure. Generally, the cross-section of the second wheel output element 1063 is convex.

[0134] The second wheel output element 1063 includes at least a first outer diameter and a second outer diameter. The first outer diameter is the outer diameter of the second end of the second wheel output element 1063; the second outer diameter is the outer diameter of the first end of the second wheel output element 1063, and the second outer diameter is smaller than the first outer diameter. Further, the second wheel output element 1063 also includes a third outer diameter. The third outer diameter is the outer diameter of the middle portion of the second wheel output element 1063 near the second end, and the third outer diameter is larger than both the first and second outer diameters. Even further, the second wheel output element 1063 also includes a fourth outer diameter. The fourth outer diameter is the outer diameter of the middle portion of the second wheel output element 1063 near the first end, and the fourth outer diameter is larger than the second outer diameter and smaller than the third outer diameter. Even further, the second wheel output element 1063 also includes a fifth outer diameter. The fifth outer diameter is the outer diameter of the middle portion of the second wheel output element 1063, and the fifth outer diameter is smaller than the third outer diameter and larger than the fourth outer diameter.

[0135] The second wheel output element 1063 includes at least a first inner diameter and a second inner diameter. The first inner diameter is the inner diameter of the second end of the second wheel output element 1063; the second inner diameter is the inner diameter of the first end of the second wheel output element 1063, and the second inner diameter is smaller than the first inner diameter. Further, the second wheel output element 1063 also includes a third inner diameter. The third inner diameter is the inner diameter of the middle portion of the second wheel output element 1063 near the second end, and the third inner diameter is smaller than the first inner diameter and larger than the second inner diameter. Further, the second wheel output element 1063 also includes a fourth inner diameter. The fourth inner diameter is the inner diameter of the middle portion of the second wheel output element 1063 near the first end, and the fourth inner diameter is larger than the second inner diameter and smaller than the third inner diameter.

[0136] The second wheel output element 1063 includes at least a first axial dimension and a second axial dimension. The first axial dimension is the axial dimension of the second end of the second wheel output element 1063; the second axial dimension is the axial dimension of the first end of the second wheel output element 1063, and the second axial dimension is smaller than the first axial dimension. Further, the second wheel output element 1063 also includes a third axial dimension. The third axial dimension is the axial dimension of the middle portion of the second wheel output element 1063 near the second end, and the third axial dimension is smaller than the first axial dimension and larger than the second axial dimension. Further, the second wheel output element 1063 also includes a fourth axial dimension. The fourth axial dimension is the axial dimension of the middle portion of the second wheel output element 1063 near the first end, and the fourth axial dimension is larger than the second axial dimension and smaller than the third axial dimension.

[0137] In some of these embodiments, the second wheel output element 1063 is a second wheel output.

[0138] The outer diameter of the connecting element 1064 is smaller than the fourth outer diameter of the second wheel output element 1063, and the axial dimension of the connecting element 1064 is not greater than the second axial dimension of the second wheel output element 1063.

[0139] In some of these embodiments, the connecting element 1064 is threaded.

[0140] In some embodiments, the roulette output unit 1060 further includes a fifth bearing element 1065. The fifth bearing element 1065 is disposed between the first roulette output element 1061 and the second roulette output element 1063, and is connected to the first roulette output element 1061 and the second roulette output element 1063, respectively.

[0141] The outer diameter of the fifth bearing element 1065 is equal to the third inner diameter of the first wheel output element 1061, and the axial dimension of the fifth bearing element 1065 is not greater than the third axial dimension of the first wheel output element 1061. The inner diameter of the fifth bearing element 1065 is equal to the first outer diameter of the second wheel output element 1063, and the axial dimension of the fifth bearing element 1065 is not greater than the first axial dimension of the second wheel output element 1063.

[0142] In some of these embodiments, the fifth bearing element 1065 includes, but is not limited to, a deep groove bearing.

[0143] In some embodiments, the wheel output unit 1060 further includes a sixth bearing element 1066. The sixth bearing element 1066 is disposed between the second wheel output element 1063 and the drive shaft unit of the geared motor 1000, and is connected to the second wheel output element 1063 and the drive shaft unit, respectively.

[0144] The outer diameter of the sixth bearing element 1066 is equal to the fourth inner diameter of the second wheel output element 1063, and the axial dimension of the sixth bearing element 1066 is not greater than the fourth axial dimension of the second wheel output element 1063.

[0145] In some of these embodiments, the sixth bearing element 1066 includes, but is not limited to, a deep groove bearing.

[0146] In some embodiments, the wheel output unit 1060 further includes a seventh bearing element 1067. The seventh bearing element 1067 is disposed between the second wheel output element 1063 and the housing unit of the geared motor 1000, and is connected to the second wheel output element 1063 and the housing unit, respectively.

[0147] The inner diameter of the seventh bearing element 1067 is equal to the fifth outer diameter of the second wheel output element 1063, and the axial dimension of the seventh bearing element 1067 is not greater than the third axial dimension of the second wheel output element 1063.

[0148] In some of these embodiments, the seventh bearing element 1067 includes, but is not limited to, a deep groove bearing.

[0149] In some embodiments, the roulette output unit 1060 further includes a third washer element 1068. The third washer element 1068 is disposed between the first roulette output element 1061 and the second roulette output element 1063.

[0150] Generally, the third washer element 1068 is located at the first end of the fifth bearing element 1065.

[0151] Furthermore, the third washer element 1068 comes into contact with the fifth bearing element 1065.

[0152] The outer diameter of the third washer element 1068 is equal to the third inner diameter of the first wheel output element 1061. The inner diameter of the third washer element 1068 is not less than the third outer diameter of the second wheel output element 1063.

[0153] In some of these embodiments, the third washer element 1068 includes, but is not limited to, wear-resistant washers and retaining rings.

[0154] In some embodiments, the roulette output unit 1060 further includes a fourth washer element 1069. The fourth washer element 1069 is disposed between the first roulette output element 1061 and the second roulette output element 1063.

[0155] Generally, the fourth washer element 1069 is located at the second end of the fifth bearing element 1065.

[0156] Furthermore, the fourth washer element 1069 comes into contact with the fifth bearing element 1065.

[0157] In some of these embodiments, the fourth washer element 1069 includes, but is not limited to, wear-resistant washers and retaining rings.

[0158] The working method of this invention is as follows: After the stator unit 1010 is energized, the rotor element 1021 rotates under the action of several magnetic elements 1024. Since the first sun gear element 1032 is fixed, a number of first planetary gear elements 1044 rotate under the combined action of the first transmission gear element 1023 and the first sun gear element 1032, thereby driving the first planet carrier element 1041 to rotate, which in turn drives the second sun gear element 1042 to rotate. Since several double-gear shaft elements 1051 are fixed, several large-end gear elements 1052 rotate under the action of the second sun gear element 1042, thereby driving several small-end gear elements 1053 to rotate. The first wheel output element 1061 rotates under the combined action of the second transmission gear element 1062 and several small end gear elements 1053, thereby driving the second wheel output element 1063 to rotate, which in turn drives the flywheel to rotate.

[0159] The advantages of this invention are: 1) The inner edge of the rotor unit is provided with a first transmission gear element, which serves as the gear ring of the first-stage planetary reducer, reducing the number of parts in the reduction structure and effectively reducing the size of the geared motor and improving space utilization; 2) The double gear transmission unit rotates on its own axis and does not revolve around the transmission shaft unit, making it easier to install sensor elements inside the geared motor, reducing sensor element failures due to cable problems and improving information transmission efficiency; 3) The double gear transmission unit and the wheel output unit serve as the final stage reduction structure of the reduction mechanism, increasing the transmission ratio and reducing the size of the geared motor; 4) The output shaft of the motor can be collinear with the output shaft of the reduction mechanism, reducing the size of the geared motor; 5) A larger transmission ratio is achieved in a relatively small space for the geared motor.

[0160] Example 2 This embodiment is a modified embodiment of embodiment 1.

[0161] like Figure 1 , Figure 2 a~ Figure 2As shown in Figure e, the geared motor 1000 further includes at least one fixed unit 1070 and at least one first- and second-stage planetary transmission units 1080. The fixed unit 1070 is coaxially disposed outside the first-stage planetary transmission unit 1040 and is connected to several double-gear transmission units 1050. The second-stage planetary transmission unit 1080 is coaxially disposed with the first-stage planetary transmission unit 1040 and the fixed unit 1070. The second end of the second-stage planetary transmission unit 1080 is connected to the first end of the first-stage planetary transmission unit 1040 and the fixed unit 1070. The first end of the second-stage planetary transmission unit 1080 is connected to the large-diameter end of several double-gear transmission units 1050, and is used to rotate under the action of the first-stage planetary transmission unit 1040 and the fixed unit 1070 to drive the several double-gear transmission units 1050 to rotate.

[0162] In some embodiments, if there are multiple fixed units 1070 and multiple secondary planetary transmission units 1080, then the fixed units 1070 and the secondary planetary transmission units 1080 correspond one-to-one, and the fixed unit 1070 closest to the first end of the geared motor 1000 is connected to multiple double gear transmission units 1050. That is, the fixed unit 1070 is divided into a first fixed unit and at least one second fixed unit. The first fixed unit is connected to multiple double gear transmission units 1050 and is drive-connected to the first and second secondary planetary transmission units 1080; the second fixed unit is drive-connected to the secondary planetary transmission units 1080. The sum of the number of first fixed units and the number of second fixed units is equal to the number of secondary planetary transmission units 1080.

[0163] The working principle of this embodiment is as follows: Under the action of the stator unit 1010, the rotor unit 1020 rotates; since the first-stage sun gear unit 1030 is fixed, the first-stage planetary transmission unit 1040 rotates under the action of the rotor unit 1020 and the first-stage sun gear unit 1030; since the fixed unit 1070 is fixed, the second-stage planetary transmission unit 1080 rotates under the action of the first-stage planetary transmission unit 1040 and the fixed unit 1070; since several double-gear transmission units 1050 are fixedly installed on the geared motor 1000, under the action of the second-stage planetary transmission unit 1080, the several double-gear transmission units 1050 rotate, thereby driving the wheel output unit 1060 to rotate, realizing the speed change function.

[0164] like Figure 8 a~ Figure 8As shown in b, the fixed unit 1070 includes a fixed frame element 1071 and a third transmission gear element 1072. The fixed frame element 1071 is coaxially disposed outside the primary planetary transmission unit 1040 and connected to the double gear transmission unit 1050. The third transmission gear element 1072 is disposed on the inner edge surface of the second end of the fixed frame element 1071 and is connected to the secondary planetary transmission unit 1080 for transmission, cooperating with the primary planetary transmission unit 1040 to rotate the secondary planetary transmission unit 1080.

[0165] Specifically, the fixed frame element 1071 is coaxially disposed outside the first planetary carrier element 1041 and connected to several double gear shaft elements 1051; the third transmission gear element 1072 cooperates with the second sun gear element 1042 to make the second-stage planetary transmission unit 1080 rotate.

[0166] Generally, the fixed bracket element 1071 and the third transmission gear element 1072 are integrally formed.

[0167] The fixing element 1071 is a hollow, axisymmetric structure. Generally, the cross-section of the fixing element 1071 is convex.

[0168] The mounting bracket element 1071 includes at least a first outer diameter and a second outer diameter. The first outer diameter is the outer diameter of the second end of the mounting bracket element 1071; the second outer diameter is the outer diameter of the first end of the mounting bracket element 1071, and the second outer diameter is larger than the first outer diameter.

[0169] The fixing bracket element 1071 includes at least a first inner diameter and a second inner diameter. The first inner diameter is the inner diameter of the second end of the fixing bracket element 1071; the second inner diameter is the inner diameter of the first end of the fixing bracket element 1071, and the second inner diameter is not less than the first inner diameter.

[0170] The mounting bracket element 1071 includes at least a first axial dimension and a second axial dimension. The first axial dimension is the axial dimension of the second end of the mounting bracket element 1071; the second axial dimension is the axial dimension of the first end of the mounting bracket element 1071, and the second axial dimension is not less than the first axial dimension.

[0171] The second inner diameter of the fixed frame element 1071 is not less than the first outer diameter of the first wheel output element 1061.

[0172] In some embodiments, the fixing frame element 1071 includes a fixing frame, a plurality of second cavities, and a plurality of third rotating holes. A third transmission gear element 1072 is provided on the inner edge surface of the second end of the fixing frame; the plurality of second cavities are arranged around the fixing frame to accommodate a plurality of large-end gear elements 1052; the plurality of third rotating holes are arranged around the fixing frame and communicate with corresponding second cavities, and are respectively connected to corresponding double-gear shaft elements 1051.

[0173] The radial dimension (e.g., inner diameter) of the third rotating hole is smaller than the radial dimension (e.g., length, width, etc.) of the second cavity.

[0174] The number of second cavities and the number of third rotating holes are equal, meaning that the second cavities and the third rotating holes correspond one-to-one.

[0175] The number of second cavities is equal to the number of double gear shaft elements 1051.

[0176] The axial dimension of the third transmission gear element 1072 is not greater than the first axial dimension of the fixed frame element 1071.

[0177] In some of these embodiments, the third transmission gear element 1072 is a third internal gear ring.

[0178] In some embodiments, the fixing unit 1070 further includes an eighth bearing element 1073. The eighth bearing element 1073 is disposed between the fixing frame element 1071 and the secondary planetary transmission unit 1080, and is connected to both the fixing frame element 1071 and the secondary planetary transmission unit 1080.

[0179] Generally, the eighth bearing element 1073 is located at the first end of the third transmission gear element 1072.

[0180] The outer diameter of the eighth bearing element 1073 is not greater than the first inner diameter of the fixed frame element 1071, and the axial dimension of the eighth bearing element 1073 is not greater than the first axial dimension of the fixed frame element 1071.

[0181] In some of these embodiments, the eighth bearing element 1073 includes, but is not limited to, a deep groove bearing.

[0182] In some embodiments, the fixing unit 1070 further includes a plurality of second mounting elements. The plurality of second mounting elements are arranged around the fixing bracket element 1071 for mounting the fixing bracket element 1071 to the housing unit of the geared motor 1000.

[0183] Generally, there are at least three second mounting elements.

[0184] In some embodiments, the second mounting element includes, but is not limited to, mounting screw holes for mounting screws, bolts, etc.

[0185] like Figure 9 a~ Figure 9As shown in b, the secondary planetary transmission unit 1080 includes a second planetary carrier element 1081, a third sun gear element 1082, several second planetary shaft elements 1083, and several second planetary gear elements 1084. The second planetary carrier element 1081 is coaxially disposed at the first end of the primary planetary transmission unit 1040; the third sun gear element 1082 is disposed at the first end of the second planetary carrier element 1081 and is connected to the large-diameter end of the double-gear transmission unit 1050, respectively, to drive the several double-gear transmission units 1050 to rotate under the action of the second planetary carrier element 1081; several second planetary shaft elements 1083 are arranged around the second planetary carrier element 1081; several second planetary gear elements 1084 are coaxially disposed on the corresponding second planetary shaft elements 1083 and are connected to the primary planetary transmission unit 1040 and the fixed unit 1070, respectively, to drive the second planetary carrier element 1081 to rotate under the action of the primary planetary transmission unit 1040 and the fixed unit 1070.

[0186] Specifically, the second planetary carrier element 1081 is coaxially disposed at the first end of the first planetary carrier element 1041; the third sun gear element 1082 meshes with a plurality of large-end gear elements 1052 respectively; and a plurality of second planetary gear elements 1084 mesh with the second sun gear element 1042 and the third transmission gear element 1072 respectively.

[0187] Generally, the second planetary carrier element 1081 and the third sun gear element 1082 are integrally formed.

[0188] The second planetary carrier element 1081 is a hollow, axisymmetric structure. Generally, the cross-section of the second planetary carrier element 1081 is convex.

[0189] The inner diameter of the second planetary carrier element 1081 is larger than the outer diameter of the second sun gear element 1042.

[0190] The second planetary carrier element 1081 includes at least a first outer diameter and a second outer diameter. The first outer diameter is the outer diameter of the second end of the second planetary carrier element 1081; the second outer diameter is the outer diameter of the first end of the second planetary carrier element 1081, and the second outer diameter is smaller than the first outer diameter. Further, the second planetary carrier element 1081 also includes a third outer diameter. The third outer diameter is the outer diameter of the middle portion of the second planetary carrier element 1081 near the second end, and the third outer diameter is smaller than the first outer diameter and larger than the second outer diameter. Even further, the second planetary carrier element 1081 also includes a fourth outer diameter. The fourth outer diameter is the outer diameter of the middle portion of the second planetary carrier element 1081 near the first end, and the fourth outer diameter is larger than the second outer diameter and smaller than the third outer diameter.

[0191] The second planetary carrier element 1081 includes at least a first inner diameter and a second inner diameter. The first inner diameter is the inner diameter of the second end of the second planetary carrier element 1081; the second inner diameter is the inner diameter of the first end of the second planetary carrier element 1081, and the second inner diameter is smaller than the first inner diameter. Further, the inner diameter of the second planetary carrier element 1081 also includes a third inner diameter. The third inner diameter is the inner diameter of the middle portion of the second planetary carrier element 1081, and the third inner diameter is smaller than the first inner diameter and larger than the second inner diameter.

[0192] The second planetary carrier element 1081 includes at least a first axial dimension and a second axial dimension. The first axial dimension is the axial dimension of the second end of the second planetary carrier element 1081; the second axial dimension is the axial dimension of the first end of the second planetary carrier element 1081, and the second axial dimension is greater than the first axial dimension. Further, the axial dimension of the second planetary carrier element 1081 also includes a third axial dimension. The third axial dimension is the axial dimension of the middle portion of the second planetary carrier element 1081, and the third axial dimension is smaller than both the first and second axial dimensions.

[0193] In some embodiments, the second planetary carrier element 1081 includes a second planetary carrier, a plurality of third cavities, a plurality of fourth rotating holes, and a plurality of fifth rotating holes. The second planetary carrier is coaxially disposed at the first end of the first planetary carrier element 1041, and a third sun gear element 1082 is disposed on the outer edge of the first end of the second planetary carrier. The plurality of third cavities surround the second planetary carrier and are used to accommodate a plurality of second planetary gear elements 1084. The plurality of fourth rotating holes surround the second planetary carrier and communicate with corresponding third cavities and are connected to corresponding second planetary shaft elements 1083. The plurality of fifth rotating holes surround the second planetary carrier and communicate with corresponding third cavities and are connected to corresponding second planetary shaft elements 1083.

[0194] The radial dimension (e.g., inner diameter) of the fourth rotating hole is smaller than the radial dimension (e.g., length, width, etc.) of the third cavity; the radial dimension (e.g., inner diameter) of the fifth rotating hole is smaller than the radial dimension (e.g., length, width, etc.) of the third cavity; the radial dimension (e.g., inner diameter) of the fifth rotating hole is equal to the radial dimension (e.g., inner diameter) of the fourth rotating hole.

[0195] The number of third cavities, fourth rotating holes, and fifth rotating holes are equal, meaning that the third cavities, fourth rotating holes, and fifth rotating holes correspond one-to-one.

[0196] The inner diameter of the third sun gear element 1082 is equal to the second outer diameter of the second planetary carrier element 1081, the outer diameter of the third sun gear element 1082 is smaller than the first outer diameter of the second planetary carrier element 1081, and the axial dimension of the third sun gear element 1082 is not greater than the second axial dimension of the second planetary carrier element 1081.

[0197] In some of these embodiments, the third sun gear element 1082 is a three-stage sun gear.

[0198] In some of these embodiments, the second planetary shaft element 1083 is rotatably connected to the fourth rotating hole and the fifth rotating hole, respectively.

[0199] In some of these embodiments, the second planetary shaft element 1083 does not rotate relative to the fourth rotating hole and the fifth rotating hole, respectively.

[0200] The number of second planetary shaft elements 1083 is equal to the number of fourth rotating holes (fifth rotating holes).

[0201] In some embodiments, the axial dimension of the second planetary shaft element 1083 is smaller than the sum of the axial dimensions of the fourth rotating hole, the third cavity, and the fifth rotating hole.

[0202] In some of these embodiments, the second planetary shaft element 1083 is a secondary planetary drive shaft.

[0203] The outer edge of the second planetary gear element 1084 protrudes from the second planetary carrier element 1081.

[0204] In some embodiments, the second planetary gear element 1084 is integrally formed with the second planetary shaft element 1083. That is, the second planetary shaft element 1083 rotates along with the second planetary gear element 1084.

[0205] In some embodiments, the second planetary gear element 1084 is rotatably connected to the second planetary shaft element 1083. That is, the second planetary shaft element 1083 remains stationary, while the second planetary gear element 1084 rotates about the second planetary shaft element 1083.

[0206] The number of second planetary gear elements 1084 is equal to the number of second planetary shaft elements 1083.

[0207] The inner diameter of the second planetary gear element 1084 is not less than the outer diameter of the second planetary shaft element 1083, and the axial dimension of the second planetary gear element 1084 is less than the axial dimension of the second planetary shaft element 1083.

[0208] The outer diameter of the second planetary gear element 1084 is greater than the difference between the third outer diameter and the third inner diameter of the second planetary carrier element 1081. The axial dimension of the second planetary gear element 1084 is not greater than the axial dimension of the third cavity. The axial dimension of the second planetary gear element 1084 is not greater than the axial dimension of the first transmission gear element 1023. The axial dimension of the second planetary gear element 1084 is less than the axial dimension of the first transmission gear element 1023. The axial dimension of the second planetary gear element 1084 is not greater than the axial dimension of the first sun gear element 1032.

[0209] In some of these embodiments, the second planetary gear element 1084 is a two-stage planetary gear.

[0210] In some embodiments, the secondary planetary transmission unit 1080 further includes a ninth bearing element 1085. The ninth bearing element 1085 is disposed between the secondary planetary carrier element and the primary planetary transmission unit 1040, and is connected to both the secondary planetary carrier element and the primary planetary transmission unit 1040.

[0211] The outer diameter of the ninth bearing element 1085 is not greater than the third inner diameter of the second planetary carrier element 1081, and the axial dimension of the ninth bearing element 1085 is not greater than the third axial dimension of the second planetary carrier element 1081. The inner diameter of the ninth bearing element 1085 is not less than the second outer diameter of the first planetary carrier element 1041, and the axial dimension of the ninth bearing element 1085 is not greater than the second axial dimension of the first planetary carrier element 1041.

[0212] In some of these embodiments, the ninth bearing element 1085 includes, but is not limited to, a deep groove bearing.

[0213] The working method of this invention is as follows: After the stator unit 1010 is energized, the rotor element 1021 rotates under the action of several magnetic elements 1024. Since the first sun gear element 1032 is fixed, a number of first planetary gear elements 1044 rotate under the combined action of the first transmission gear element 1023 and the first sun gear element 1032, thereby driving the first planet carrier element 1041 to rotate, which in turn drives the second sun gear element 1042 to rotate. Since the fixed frame element 1071 is fixed, the second planetary gear elements 1084 rotate under the combined action of the second sun gear element 1042 and the third transmission gear element 1072, thereby driving the second planetary carrier element 1081 to rotate, which in turn drives the third sun gear element 1082 to rotate. Since several double-gear shaft elements 1051 are fixed, several large-end gear elements 1052 rotate under the action of the third sun gear element 1082, thereby driving several small-end gear elements 1053 to rotate. The first wheel output element 1061 rotates under the combined action of the second transmission gear element 1062 and several small end gear elements 1053, thereby driving the second wheel output element 1063 to rotate, which in turn drives the flywheel to rotate.

[0214] In this invention, with only one fixed unit 1070 and one secondary planetary transmission unit 1080, the rotor unit 1020 and the primary planetary transmission unit 1040 can achieve a reduction ratio of 1 to 2, the primary planetary transmission unit 1040 and the secondary planetary transmission unit 1080 can achieve a reduction ratio of 2 to 5, the secondary planetary transmission unit 1080 and the double gear transmission unit 1050 can achieve a reduction ratio of 1 to 5, and the double gear transmission unit 1050 and the wheel output unit 1060 can achieve a reduction ratio of 6 to 10.

[0215] The advantage of this embodiment is that it achieves a large transmission ratio within a relatively small space of the geared motor.

[0216] Example 3 This embodiment is a modified embodiment of Embodiments 1 and 2.

[0217] like Figure 1 , Figure 2 a~ Figure 2 As shown in Figure e, the geared motor 1000 also includes a control unit 1090. The control unit 1090 is located inside the geared motor 1000 and is communicatively connected to the stator unit 1010 for controlling the geared motor 1000.

[0218] like Figure 10 As shown, the control unit 1090 includes a mounting bracket element 1091 and a control element 1092. The mounting bracket element 1091 is disposed inside the geared motor 1000; the control element 1092 is mounted on the mounting bracket element 1091 and is communicatively connected to the stator unit 1010 for controlling the geared motor 1000.

[0219] In some embodiments, mounting element 1091 is a PCB frame used to fix control element 1092.

[0220] In some embodiments, the control element 1092 includes, but is not limited to, a PCB board for controlling the geared motor 1000.

[0221] like Figure 1 , Figure 2 a~ Figure 2As shown in Figure e, the geared motor 1000 also includes a drive shaft unit 1100. The drive shaft unit 1100 is coaxially arranged with the first-stage sun gear unit 1030, the first-stage planetary transmission unit 1040, the double gear transmission unit 1050, and the wheel output unit 1060, respectively. Both ends of the drive shaft unit 1100 are connected to the pedal.

[0222] like Figure 11 a~ Figure 11 As shown in Figure b, the transmission shaft unit 1100 includes a male shaft element 1101 and a female shaft element 1102. The male shaft element 1101 is coaxially arranged with the stator unit 1010, the rotor unit 1020, the first-stage sun gear unit 1030, the first-stage planetary transmission unit 1040, and the wheel output unit 1060, respectively. The female shaft element 1102 is coaxially arranged with the wheel output unit 1060, and the second end of the female shaft element 1102 is connected to the first end of the male shaft element 1101.

[0223] Furthermore, the male shaft element 1101 is also coaxially arranged with the secondary planetary transmission unit 1080 and is connected to the secondary planetary transmission unit 1080 for transmission.

[0224] The male shaft element 1101 is a hollow, axisymmetric structure. Generally, the cross-section of the male shaft element 1101 is convex.

[0225] The second end of the male shaft element 1101 is internally threaded for connection with one foot pedal of the electric bicycle.

[0226] In some of these embodiments, the male shaft element 1101 is a drive male shaft.

[0227] The second end of the female shaft element 1102 is detachably connected to the first end of the male shaft element 1101, such as by bolts.

[0228] The parent shaft element 1102 is a hollow, axisymmetric structure. Generally, the cross-section of the parent shaft element 1102 is convex.

[0229] The second end of the female shaft element 1102 is provided with a threaded spline for connection to the torque monitoring unit of the geared motor 1000.

[0230] The first end of the female shaft element 1102 is internally threaded for connection with the other pedal of the electric bicycle.

[0231] In some of these embodiments, the female shaft element 1102 is a transmission female shaft.

[0232] like Figure 1 , Figure 2 a~ Figure 2As shown in Figure e, the geared motor 1000 also includes a unidirectional rotation unit 1110. The unidirectional rotation unit 1110 is coaxially arranged with the wheel output unit 1060 and is used for the unidirectional movement of the wheel output unit 1060.

[0233] like Figure 12 As shown, the unidirectional rotation unit 1110 includes a first unidirectional rotation element 1111 and / or a second unidirectional rotation element 1112. The first unidirectional rotation element 1111 is disposed inside the wheel output unit 1060 and is used to cause the wheel output unit 1060 to rotate in one direction. The second unidirectional rotation element 1112 is disposed between the wheel output unit 1060 and the drive shaft unit 1100 of the geared motor 1000 and is used to cause the wheel output unit 1060 to rotate in one direction.

[0234] Furthermore, the second unidirectional rotation element 1112 is disposed between the wheel output unit 1060 and the torque monitoring unit of the geared motor 1000.

[0235] Specifically, the first unidirectional rotating element 1111 is disposed between the first wheel output element 1061 and the second wheel output element 1063, and is used to make the second wheel output element 1063 rotate in one direction; the second unidirectional rotating element 1112 is disposed between the second wheel output element 1063 and the mother shaft element 1102, and is used to make the second wheel output element 1063 rotate in one direction.

[0236] The outer diameter of the first one-way rotating element 1111 is equal to the second inner diameter of the first wheel output element 1061, and the axial dimension of the first one-way rotating element 1111 is not greater than the second axial dimension of the first wheel output element 1061. The inner diameter of the first one-way rotating element 1111 is equal to the third outer diameter of the second wheel output element 1063, and the axial dimension of the first one-way rotating element 1111 is not greater than the first axial dimension of the first wheel output element 1061.

[0237] In some of these embodiments, the first one-way rotating element 1111 includes, but is not limited to, an overrunning clutch.

[0238] The outer diameter of the second unidirectional rotating element 1112 is equal to the third inner diameter of the second wheel output element 1063, and the axial dimension of the second unidirectional rotating element 1112 is not greater than the third axial dimension of the second wheel output element 1063.

[0239] In some of these embodiments, the second one-way rotating element 1112 includes, but is not limited to, an overrunning clutch.

[0240] like Figure 1 , Figure 2 a~ Figure 2As shown in Figure e, the geared motor 1000 also includes a torque monitoring unit 1120. The torque monitoring unit 1120 is coaxially disposed inside the wheel output unit 1060 and is used to monitor torque.

[0241] Furthermore, the torque monitoring unit 1120 is connected to the control unit 1090 and is used to output torque data to the control unit 1090, so that the control unit 1090 can control the stator unit 1010 to achieve deceleration adjustment.

[0242] Furthermore, the torque monitoring unit 1120 is connected to the drive shaft unit 1100 and is used to monitor the torque of the drive shaft unit 1100.

[0243] In some embodiments, the torque monitoring unit 1120 includes, but is not limited to, a torque sensor.

[0244] like Figure 1 , Figure 2 a~ Figure 2 As shown in Figure e, the geared motor 1000 also includes a housing unit 1130. The housing unit 1130 contains a stator unit 1010, a rotor unit 1020, a first-stage sun gear unit 1030, a first-stage planetary transmission unit 1040, several double-gear transmission units 1050, and a wheel output unit 1060.

[0245] like Figure 13 a~ Figure 13 As shown in b, the housing unit 1130 includes a first housing element 1131 and a second housing element 1132. The first housing element 1131 internally houses a stator unit 1010, a rotor unit 1020, a first-stage sun gear unit 1030, a first-stage planetary transmission unit 1040, and several double-gear transmission units 1050. The second housing element 1132 internally houses several double-gear transmission units 1050 and a wheel output unit 1060. The second end of the second housing element 1132 is detachably connected to the first end of the first housing element 1131.

[0246] Furthermore, the first housing element 1131 is also provided with a fixing unit 1070, a secondary planetary transmission unit 1080, a control unit 1090, and a transmission shaft unit 1100; the second housing element 1132 is also provided with a transmission shaft unit 1100, a unidirectional rotation unit 1110, and a torque monitoring unit 1120.

[0247] In some of these embodiments, the first housing element 1131 is a motor housing.

[0248] The second housing element 1132 is detachably connected to the first housing element 1131, such as by bolts.

[0249] In some of these embodiments, the second housing element 1132 is the lower housing of the motor.

[0250] In some embodiments, the housing unit 1130 further includes a sealing element 1133. The sealing element 1133 is disposed between the first housing element 1131 and the second housing element 1132, and is connected to the first housing element 1131 and the second housing element 1132, respectively.

[0251] The sealing element 1133 is detachably connected to the first housing element 1131 and the second housing element 1132, such as by bolts.

[0252] In some of these embodiments, the sealing element 1133 includes, but is not limited to, a sealing gasket.

[0253] like Figure 1 , Figure 2 a~ Figure 2 As shown in Figure e, the geared motor 1000 also includes a hanger unit 1140. The hanger unit 1140 is disposed outside the geared motor 1000 and is used to mount the geared motor 1000 onto the electric bicycle.

[0254] Furthermore, the hanger unit 1140 is disposed outside the housing unit 1130.

[0255] Furthermore, the hanger unit 1140 is detachably connected to the first housing element 1131 and the second housing element 1132, such as by bolt connection.

[0256] The advantages of this embodiment are: 1) By using the transmission shaft unit, the output shaft of the geared motor and the output shaft of the reduction mechanism are made collinear, reducing the size of the geared motor; 2) By using the unidirectional rotation unit, the wheel output unit is rotated in one direction, avoiding the application of reverse torque to the geared motor; 3) By using the torque monitoring unit to monitor the torque of the transmission shaft unit, the reduction ratio of the geared motor is changed, assisting the user of the electric bicycle in climbing and other actions.

[0257] Example 4 This embodiment relates to the flywheel of the present invention.

[0258] like Figure 14 As shown, a flywheel 2000 is connected to the geared motor 1000 described in Embodiments 1 to 4, and includes a mounting unit 2010 and a flywheel unit 2020. The mounting unit 2010 is connected to the first end of the wheel output unit 1060 of the geared motor 1000; the flywheel unit 2020 is disposed at the second end of the mounting unit 2010 and is connected to the chain drive of the electric bicycle.

[0259] In some embodiments, the mounting unit 2010 includes a base element and a locking element. The base element is coaxially disposed at the first end of the wheel output unit 1060; the locking element is connected to both the base element and the wheel output unit 1060, and is used to fix the base element to the wheel output unit 1060.

[0260] Specifically, the base element is coaxially disposed at the first end of the second wheel output element 1063; the locking element is connected to the connecting element 1064.

[0261] In some of these embodiments, the base element includes, but is not limited to, the flywheel baffle; the locking element includes, but is not limited to, the lock nut.

[0262] The flywheel unit 2020 is detachably connected to the base element of the mounting unit 2010, for example, by means of nuts and bolts.

[0263] In some of these embodiments, the flywheel unit 2020 includes, but is not limited to, a flywheel.

[0264] In some embodiments, the flywheel 2000 further includes a protection unit 2030 disposed at the first end of the mounting unit 2010 for protecting the flywheel unit 2020.

[0265] The protection unit 2030 is detachably connected to the base element and the flywheel unit 2020, for example, by means of nuts and bolts.

[0266] In some of these embodiments, the protection unit 2030 includes, but is not limited to, the flywheel mount.

[0267] Example 5 This embodiment relates to the electric bicycle of the present invention.

[0268] like Figure 15 a~ Figure 15 As shown in b, an electric bicycle includes at least a geared motor 1000 as described in Examples 1 to 3.

[0269] In some of these embodiments, the electric bicycle also includes a flywheel 2000 as described in Embodiment 4.

[0270] In this invention, the electric vehicle includes, but is not limited to, electric two-wheelers and electric tricycles. For example, electric bicycles, electric motorcycles, and electric wheelchairs.

[0271] The technical effects of this embodiment are basically the same as those of Embodiments 1 to 3, and will not be repeated here.

[0272] The above description is merely a preferred embodiment of the present invention and does not limit the implementation and protection scope of the present invention. Those skilled in the art should realize that any equivalent substitutions and obvious changes made based on the description and illustrations of the present invention should be included within the protection scope of the present invention.

Claims

1. A geared motor, characterized in that, include: Stator unit; A rotor unit, which is coaxially disposed inside the stator unit; A first-stage sun gear unit, which is coaxially disposed inside the rotor unit; A primary planetary transmission unit is coaxially disposed inside the rotor unit and coaxially disposed outside the primary sun gear unit, and is respectively connected to the rotor unit and the primary sun gear unit for rotating under the action of the rotor unit and the primary sun gear unit; A plurality of double gear transmission units are arranged around the first end of the first-stage planetary transmission unit, and the large-diameter ends of the plurality of double gear transmission units are respectively connected to the first-stage planetary transmission unit for rotation under the action of the first-stage planetary transmission unit. A wheel output unit is coaxially arranged with the first-stage planetary transmission unit. The second end of the wheel output unit is connected to the small-diameter end of several double-gear transmission units. The first end of the wheel output unit is connected to a flywheel and is used to drive the flywheel to rotate under the action of several double-gear transmission units.

2. The geared motor according to claim 1, characterized in that, The rotor unit includes: A rotor element, which is coaxially disposed inside the stator unit; A plurality of placement slot elements are arranged around the outer edge surface of the rotor element; The first transmission gear element is disposed on the inner edge surface of the rotor element and is connected to the first-stage planetary transmission unit for cooperating with the first-stage sun gear unit to make the first-stage planetary transmission unit rotate. A plurality of magnetic elements are disposed inside the corresponding placement slot elements, for driving the rotor element to rotate under the action of the stator unit; and / or The primary sun gear unit includes: A solar frame element, which is coaxially disposed inside the rotor unit; A first sun gear element is disposed at a first end of the sun carrier element and is connected to the first-stage planetary transmission unit for cooperating with the rotor unit to rotate the first-stage planetary transmission unit; and / or The primary planetary transmission unit includes: A first planetary carrier element is coaxially disposed between the rotor unit and the first-stage sun gear unit; The second sun gear element is disposed at the first end of the first planetary carrier element and is respectively connected to the large diameter end of the plurality of double gear transmission units, and is used to drive the plurality of double gear transmission units to rotate under the action of the first planetary carrier element. A plurality of first planetary shaft elements are arranged around the first planet carrier element; A plurality of first planetary gear elements are coaxially disposed on corresponding first planetary shaft elements and are respectively connected to the rotor unit and the first-stage sun gear unit for driving the first planetary carrier element to rotate under the action of the rotor unit and the first-stage sun gear unit; and / or The double gear transmission unit includes: A double gear shaft element, wherein the double gear shaft element is fixedly installed inside the geared motor; A large-end gear element is coaxially disposed on the double-gear shaft element and is connected to the first end of the first-stage planetary transmission unit for rotating under the action of the first-stage planetary transmission unit. The small-end gear element is coaxially mounted on the double-gear shaft element and fixedly connected to the large-end gear element, and is also connected to the second end of the wheel output unit for transmission, thereby driving the wheel output unit to rotate under the action of the large-end gear element; and / or The roulette output unit includes: The first wheel output element is coaxially arranged with the first-stage planetary transmission unit; The second transmission gear element is disposed on the inner edge surface of the second end of the first wheel output element and is respectively connected to the small diameter end of the plurality of double gear transmission units, and is used to drive the first wheel output element to rotate under the action of the plurality of double gear transmission units. The second wheel output element is connected to the first wheel output element in a transmission manner and is used to rotate under the action of the first wheel output element; A connecting element is disposed at the first end of the second wheel output element and connected to the flywheel, for driving the flywheel to rotate under the action of the second wheel output element.

3. The geared motor according to claim 2, characterized in that, The rotor unit also includes: A first bearing element is disposed between the rotor element and the first-stage planetary transmission unit, and is connected to both the rotor element and the first-stage planetary transmission unit; and / or The primary sun gear unit also includes: A second bearing element is disposed between the sun frame element and the drive shaft unit of the geared motor, and is connected to the sun frame element and the drive shaft unit respectively; and / or The primary planetary transmission unit also includes: A third bearing element is disposed between the first planetary carrier element and the first-stage sun gear unit, and is connected to both the first planetary carrier element and the first-stage sun gear unit; and / or The primary planetary transmission unit also includes: A first washer element, wherein the first washer element is disposed at the second end of the first planetary carrier element; and / or The primary planetary transmission unit also includes: A second washer element is disposed at a first end of the first planetary carrier element; and / or The double gear transmission unit also includes: A fourth bearing element is disposed between the double gear shaft element and the large-end gear element, and is connected to both the double gear shaft element and the large-end gear element; and / or The double gear transmission unit also includes: A bushing element, wherein the bushing element is sleeved on the double gear shaft element; and / or The roulette output unit also includes: A fifth bearing element is disposed between the first wheel output element and the second wheel output element, and is connected to both the first wheel output element and the second wheel output element; and / or The roulette output unit also includes: A sixth bearing element is disposed between the second wheel output element and the drive shaft unit of the geared motor, and is connected to the second wheel output element and the drive shaft unit respectively; and / or The roulette output unit also includes: A seventh bearing element is disposed between the second wheel output element and the housing unit of the geared motor, and is connected to the second wheel output element and the housing unit respectively; and / or The roulette output unit also includes: A third washer element is disposed between the first wheel output element and the second wheel output element; and / or The roulette output unit also includes: A fourth washer element is disposed between the first wheel output element and the second wheel output element.

4. The geared motor according to any one of claims 2 to 3, characterized in that, Also includes: At least one fixed unit is coaxially disposed outside the first-stage planetary transmission unit and is connected to several of the double-gear transmission units respectively. At least one or two planetary transmission units, wherein the secondary planetary transmission units are coaxially arranged with the primary planetary transmission unit and the fixed unit, respectively; the second end of the secondary planetary transmission unit is drive-connected to the first end of the primary planetary transmission unit and the fixed unit, respectively; and the first end of the secondary planetary transmission unit is drive-connected to the large-diameter ends of a plurality of double-gear transmission units, for rotating under the action of the primary planetary transmission unit and the fixed unit to drive the plurality of double-gear transmission units to rotate; and / or The control unit, located inside the geared motor and communicatively connected to the stator unit, is used to control the geared motor; and / or A driveshaft unit, which is coaxially arranged with the first-stage sun gear unit, the first-stage planetary transmission unit, and the wheel output unit, and whose two ends are respectively connected to the pedal; and / or A one-way rotation unit is coaxially arranged with the wheel output unit and is used for the one-way movement of the wheel output unit. and / or A torque monitoring unit, coaxially disposed inside the wheel output unit, is used to monitor torque; and / or The housing unit, internally comprising the stator unit, the rotor unit, the first-stage sun gear unit, the first-stage planetary transmission unit, a plurality of the double-gear transmission units, and the wheel output unit; and / or A mounting bracket unit is disposed outside the geared motor and is used to mount the geared motor onto the electric bicycle.

5. The geared motor according to claim 4, characterized in that, The fixing unit includes: A fixed frame element is coaxially disposed outside the first-stage planetary transmission unit and is connected to several of the double-gear transmission units respectively. A third transmission gear element is disposed on the inner edge surface of the second end of the fixed frame element and is connected to the secondary planetary transmission unit for transmission, and is used to cooperate with the primary planetary transmission unit to rotate the secondary planetary transmission unit; and / or The secondary planetary transmission unit includes: The second planetary carrier element is coaxially disposed at the first end of the first-stage planetary transmission unit; The third sun gear element is disposed at the first end of the second planetary carrier element and is respectively connected to the large diameter end of the plurality of double gear transmission units, and is used to drive the plurality of double gear transmission units to rotate under the action of the second planetary carrier element. A plurality of second planetary shaft elements are arranged around the second planetary carrier element; A plurality of second planetary gear elements are coaxially disposed on corresponding second planetary shaft elements and are respectively connected to the first-stage planetary transmission unit and the fixed unit for driving the second planetary carrier element to rotate under the action of the first-stage planetary transmission unit and the fixed unit; and / or The control unit includes: Mounting bracket element, the mounting bracket element being disposed inside the geared motor; A control element, mounted on the mounting bracket element and communicatively connected to the stator unit, is used to control the geared motor; and / or The drive shaft unit includes: A male shaft element is coaxially arranged with the stator unit, the rotor unit, the first-stage sun gear unit, the first-stage planetary transmission unit, and the wheel output unit, respectively. A female shaft element, coaxially arranged with the wheel output unit, wherein the second end of the female shaft element is connected to the first end of the male shaft element; and / or The unidirectional rotation unit includes: A first unidirectional rotating element, disposed inside the wheel output unit, is used to cause the wheel output unit to rotate in one direction; and / or The unidirectional rotation unit includes: A second unidirectional rotating element is disposed between the wheel output unit and the drive shaft unit of the geared motor, for causing the wheel output unit to rotate in one direction; and / or The outer casing unit includes: A first housing element, wherein the stator unit, the rotor unit, the first-stage sun gear unit, the first-stage planetary transmission unit, and a plurality of the double-gear transmission units are disposed inside the first housing element; The second housing element has a plurality of the aforementioned double gear transmission units and the wheel output unit disposed inside it, and the second end of the second housing element is detachably connected to the first end of the first housing element.

6. The geared motor according to claim 5, characterized in that, The fixing unit further includes: An eighth bearing element is disposed between the fixed frame element and the secondary planetary transmission unit, and is connected to both the fixed frame element and the secondary planetary transmission unit; and / or The secondary planetary transmission unit also includes: A ninth bearing element, wherein the ninth bearing element is disposed between the second-stage planetary carrier element and the first-stage planetary transmission unit, and is connected to the second-stage planetary carrier element and the first-stage planetary transmission unit respectively; and / or The housing unit further includes: A sealing element is disposed between the first housing element and the second housing element, and is connected to the first housing element and the second housing element respectively.

7. A flywheel, connected to a geared motor as described in any one of claims 1 to 6, characterized in that, include: The mounting unit is connected to the first end of the wheel output unit of the geared motor; A flywheel unit, wherein the flywheel unit is disposed in the mounting unit.

8. The flywheel according to claim 7, characterized in that, Also includes: A protection unit is disposed in the mounting unit and is used to protect the flywheel unit.

9. A power-assisted bicycle, characterized in that, include: The geared motor as described in any one of claims 1 to 6.

10. A power-assisted bicycle, characterized in that, include: The geared motor as described in any one of claims 1 to 6; The flywheel as described in any one of claims 8 to 9.

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