A double-sided outer rotor motor for a cycling platform

Abstract

The utility model discloses a kind of double-sided outer rotor motor for cycling platform, stator module includes core body and two respectively formed in the wire slot assembly of both sides of core body, wire slot assembly includes multiple multiple tooth parts and multiple yoke parts spaced apart along the circumferential direction of core body;Two coil groups are wound outside two wire slot assemblies, and two coil components are electrically connected;Rotor module includes two rotor components, and two rotor components are adjacently arranged with two wire slot assemblies;Shaft component is connected with the stator module;In the energized state of coil group, rotor module can rotate relative to stator module and shaft component.The utility model aims at providing a kind of double-sided outer rotor motor for cycling platform, with the characteristics of high power density miniaturization.

Description

Technical Field

[0001] This utility model belongs to the field of fitness equipment technology, specifically, it relates to a double-sided external rotor motor for cycling trainers. Background Technology

[0002] Currently, most mainstream motor-driven cycling trainers on the market use external rotor motors to provide damping force. The traditional external rotor motor structure is a radial magnetic flux rotating in one side. To meet the high torque requirements of cycling enthusiasts, the traditional external rotor motor can only increase the motor diameter as much as possible while keeping the motor thickness unchanged. However, such a design will inevitably increase the manufacturing cost of the motor and increase the weight of the entire cycling trainer.

[0003] Therefore, designing a double-sided external rotor motor for cycling trainers with high power density and miniaturization is an urgent need in the current indoor cycling field. Utility Model Content

[0004] The purpose of this invention is to provide a double-sided external rotor motor for a cycling trainer, which features high power density and miniaturization.

[0005] To achieve the above-mentioned objectives, the present invention employs the following technical solution: This utility model proposes a double-sided external rotor motor for a cycling trainer, comprising: The stator module includes an iron core body and two slot assemblies formed on both sides of the iron core body. The slot assemblies include a plurality of teeth and a plurality of yokes spaced apart along the circumferential direction of the iron core body. Two coil groups are respectively wound around the two wire groove assemblies, and the two coil assemblies are electrically connected; A rotor module includes two rotor assemblies, each of which is disposed adjacent to one of the two slot assemblies. A shaft assembly connected to the stator module; When the coil group is energized, the rotor module can rotate relative to the stator module and the shaft assembly.

[0006] In some embodiments of this application, the two rotor assemblies are defined as a first rotor assembly and a second rotor assembly, respectively; The first rotor assembly includes a first rotor housing and a first magnet assembly, wherein the first magnet assembly is connected to one side inside the first rotor housing; The second rotor assembly includes a second rotor housing and a second magnet assembly, the second magnet assembly being connected to one side inside the second rotor housing; The two grooved assemblies are defined as a first grooved assembly and a second grooved assembly, respectively, and the first grooved assembly and the second grooved assembly are respectively formed on both sides of the iron core body; The two coil groups are defined as a first coil group and a second coil group, respectively. The first coil group is fitted outside the first wire groove assembly, and the second coil group is fitted outside the second wire groove assembly. The first rotor housing is installed outside the first coil group and the first wire groove assembly, and the second rotor housing is installed outside the second coil group and the second wire groove assembly.

[0007] In some embodiments of this application, the first magnet assembly includes a first magnet retainer and a plurality of first magnets, the plurality of first magnets being arranged at circumferential intervals along the first magnet retainer; The second magnet assembly includes a second magnet retainer and a plurality of second magnets, the plurality of second magnets being arranged at circumferential intervals along the second magnet retainer.

[0008] In some embodiments of this application, the first magnet retainer is bonded to the first rotor housing, and the first magnet retainer is provided with a plurality of first mounting slots spaced apart along its circumference, and a plurality of first magnets are respectively installed in the plurality of first mounting slots; The second magnet retainer is bonded to the second rotor housing. The second magnet retainer has a plurality of second mounting slots spaced apart along its circumference, and the plurality of second magnets are respectively installed in the plurality of second mounting slots.

[0009] In some embodiments of this application, the shaft assembly includes a first bearing assembly and a shaft body; A first bearing housing is formed on the first rotor housing; In this configuration, with the first bearing assembly installed in the first bearing housing, the shaft body is installed in the first bearing housing, the first rotor assembly is rotatably connected to the shaft body via the first bearing assembly, and the first bearing assembly is axially positioned with respect to the shaft body.

[0010] In some embodiments of this application, the first bearing assembly includes at least two first bearings of different diameters. The first bearing housing has at least two bearing mounting positions formed axially, and a first annular positioning stop is formed between two adjacent bearing mounting positions; At least two of the first bearings are respectively installed in at least two bearing mounting positions, and the first annular locating stop is used for axial positioning of the first bearings.

[0011] In some embodiments of this application, a second annular positioning stop is formed on the shaft body, the first bearing abuts against the second annular positioning stop, and the second annular positioning stop is used to axially position the first bearing.

[0012] In some embodiments of this application, the shaft assembly further includes a bracket and a second bearing, wherein a second bearing housing is formed on the second rotor housing; The bracket is inserted into the second bearing housing, and the second bearing is installed between the second bearing housing and the bracket; The bracket has a first connecting end and a second connecting end at its two ends in the axial direction. The first connecting end is connected to the iron core body, and the second connecting end is connected to the shaft body.

[0013] In some embodiments of this application, a third annular positioning stop is formed on the shaft body. When the shaft body is installed in the bracket, the second connecting end abuts against the third annular positioning stop, and the third annular positioning stop is used for axial positioning of the bracket. The bracket abuts against the third annular positioning stop, the second rotor housing is rotatably connected to the bracket via the second bearing, the stator module is connected to the bracket, the first bearing seat is fitted onto the first bearing assembly, and the end of the first rotor housing abuts against the end of the second rotor housing.

[0014] In some embodiments of this application, a through-path is formed between the second connection end and the iron core body, and the first coil group and the second coil group are electrically connected through the through-path; And / or, the bracket is provided with a number of heat dissipation holes.

[0015] Compared with the prior art, the advantages and positive effects of this utility model are: By forming slotted assemblies on both sides of the iron core body, two coil groups are wound around the two slotted assemblies respectively, and two rotor assemblies are arranged adjacent to the two slotted assemblies respectively. The shaft assembly is connected to the stator module. The rotor module generates damping force relative to the stator module and shaft assembly. Since slotted assemblies are formed on both sides of the iron core body, and the coil groups are wound around the slotted assemblies on both sides, the above-mentioned dual-rotor motor, compared with the traditional external rotor motor, can greatly reduce the thickness and outer diameter of the motor while increasing the output torque of the motor, thereby reducing the weight and cost of the entire riding platform. At the same time, since the dual rotors are located on both sides, the heat dissipation area can be increased and the heat dissipation speed can be improved, thereby improving the user's riding experience.

[0016] Other features and advantages of this utility model will become clearer after reading the specific embodiments of this utility model in conjunction with the accompanying drawings. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the overall structure of an embodiment of a double-sided external rotor motor for a cycling trainer proposed in this utility model; Figure 2 This is a front view of one embodiment of a double-sided external rotor motor for a cycling trainer proposed in this utility model; Figure 3 yes Figure 2 Sectional view along the middle AA direction; Figure 4 This is a top view of one embodiment of a double-sided external rotor motor for a cycling trainer proposed in this utility model; Figure 5 yes Figure 4 Sectional view along the BB direction; Figure 6 This is a schematic diagram of the overall structure of an embodiment of the first rotor housing of a double-sided external rotor motor for a cycling trainer proposed in this utility model; Figure 7 This is a schematic diagram of the overall structure of an embodiment of the second rotor housing of a double-sided external rotor motor for a cycling trainer proposed in this utility model; Figure 8 This is a schematic diagram of the overall structure of the shaft assembly, stator module, first magnet assembly, and second magnet assembly of a double-sided external rotor motor for a cycling trainer proposed in this utility model. Figure 9 This is a front view of the shaft assembly, stator module, first magnet assembly, and second magnet assembly of a double-sided external rotor motor for a cycling trainer proposed in this utility model. Figure 10 This is a schematic diagram of the overall structure of the stator module of a double-sided external rotor motor for a cycling trainer proposed in this utility model. Figure 11 This is a schematic diagram of the overall structure of a bracket for a double-sided external rotor motor for a cycling trainer proposed in this utility model. In the picture, 100. Stator module; 110. Iron core body; 120. Cable tray assembly; 121. Teeth; 122. Yoke; 123. First cable tray assembly; 124. Second cable tray assembly; 300. Rotor module; 310. Rotor assembly; 311. First rotor assembly; 3111, First rotor housing; 31111, First bearing housing; 31112, Bearing mounting position; 31113. First annular positioning stop; 3112. First magnet assembly; 31121. First magnet cage; 31122, First Magnet; 31123, First mounting slot; 312. Second rotor assembly; 3121. Second rotor housing; 31211, Second bearing housing; 3122. Second magnet assembly; 400, shaft assembly; 410. First bearing assembly; 420. Shaft body; 421. Second annular positioning stop; 422. Third ring positioning stop; 430. Bracket; 431. First connection end; 432. Second connection end; 433. Heat dissipation holes; 434. Through-passage; 440. Second bearing. Detailed Implementation

[0019] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0020] In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0021] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0022] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, a direct connection, or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0023] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0024] The following disclosure provides many different embodiments or examples for implementing various structures of the present invention. To simplify the disclosure, specific examples of components and arrangements are described below. Of course, these are merely examples and are not intended to limit the scope of the invention. Furthermore, reference numerals and / or reference letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed.

[0025] In some embodiments of this application, a double-sided external rotor motor for a cycling trainer is disclosed, such as... Figure 1 , Figure 2 , Figure 3 , Figure 5 , Figure 8 , Figure 9 , Figure 10 As shown, it includes a stator module 100, two coil groups, a rotor module 300, and a shaft assembly 400.

[0026] like Figure 3 , Figure 5 , Figure 9 , Figure 10 As shown, the stator module 100 includes a core body 110 and two slot assemblies 120 formed on both sides of the core body 110.

[0027] The wire groove assembly 120 includes a plurality of teeth 121 and a plurality of yokes 122 spaced apart along the circumferential direction of the iron core body 110.

[0028] Multiple teeth 121 and multiple yokes 122 are arranged at intervals along the same circumference.

[0029] Two coil groups are wound around two wire groove assemblies 120 respectively, and the two coil groups are electrically connected.

[0030] The rotor module 300 includes two rotor assemblies 310, which are respectively arranged adjacent to two slot assemblies 120.

[0031] Specifically, the two rotor assemblies 310 are respectively mounted on the outside of the two coil groups.

[0032] The shaft assembly 400 is connected to the stator module 100.

[0033] The rotor module 300 can rotate relative to the stator module 100 and the shaft assembly 400.

[0034] When the coil group is energized, the rotor module 300 can rotate relative to the stator module 100 and the shaft assembly 400.

[0035] The two rotor assemblies 310 are defined as the first rotor assembly 311 and the second rotor assembly 312, respectively.

[0036] The first rotor assembly 311 includes a first rotor housing 3111 and a first magnet assembly 3112. The first magnet assembly 3112 is connected to one side inside the first rotor housing 3111.

[0037] The second rotor assembly 312 includes a second rotor housing 3121 and a second magnet assembly 3122. The second magnet assembly 3122 is connected to one side inside the second rotor housing 3121.

[0038] The first rotor assembly 311 and the second rotor assembly 312 are respectively disposed on both sides of the iron core body 110. The rotors can greatly reduce the thickness and outer diameter of the motor while increasing the output torque of the motor, thereby reducing the weight and cost of the entire riding platform. At the same time, since the two rotors are located on both sides, the heat dissipation area can be increased and the heat dissipation speed can be improved, thereby improving the user's riding experience.

[0039] Specifically, the first magnet assembly 3112 and the second magnet assembly 3122 are respectively connected to the side of the first rotor housing 3111 and the second rotor housing 3121 near the stator module 100.

[0040] Specifically, the first magnet assembly 3112 is bonded to the inside of the first rotor housing 3111 by adhesive bonding. The second magnet assembly 3122 is bonded to the inside of the second rotor housing 3121 by adhesive bonding.

[0041] The first magnet assembly 3112 includes a first magnet retainer 31121 and a plurality of first magnets 31122, wherein the plurality of first magnets 31122 are arranged circumferentially at intervals from the first magnet retainer 31121.

[0042] The second magnet assembly 3122 includes a second magnet retainer and a plurality of second magnets, the plurality of second magnets being arranged at circumferential intervals along the second magnet retainer.

[0043] The first magnet retainer 31121 is bonded inside the first rotor housing 3111. The first magnet retainer 31121 has multiple first mounting slots 31123 spaced apart along its circumference, and multiple first magnets 31122 are respectively installed in the multiple first mounting slots 31123.

[0044] The second magnet retainer is bonded inside the second rotor housing 3121. The second magnet retainer has multiple second mounting slots spaced apart along its circumference, and multiple second magnets are respectively installed in the multiple second mounting slots.

[0045] The two slotting assemblies 120 are defined as a first slotting assembly 123 and a second slotting assembly 124. The first slotting assembly 123 and the second slotting assembly 124 are respectively formed on both sides of the iron core body 110.

[0046] The two coil groups are defined as the first coil group and the second coil group, respectively. The first coil group is fitted outside the first wire groove assembly 123, and the second coil group is fitted outside the second wire groove assembly 124.

[0047] The first rotor housing 3111 is installed outside the first coil group and the first wire groove assembly 123, and the second rotor housing 3121 is installed outside the second coil group and the second wire groove assembly 124.

[0048] The shaft assembly 400 includes a first bearing assembly 410 and a shaft body 420.

[0049] like Figure 3 , Figure 5 , Figure 6 As shown, a first bearing housing 31111 is formed on the first rotor housing 3111, and a first bearing assembly 410 is installed in the first bearing housing 31111.

[0050] With the first bearing assembly 410 installed in the first bearing housing 31111, the shaft body 420 is installed in the first bearing housing 31111, and the first rotor assembly 311 is rotatably connected to the outside of the shaft body 420 through the first bearing assembly 410. The first bearing assembly 410 and the shaft body 420 are axially positioned.

[0051] like Figure 3 , Figure 5 As shown, the first bearing assembly 410 includes at least two first bearings with different diameters.

[0052] At least two bearing mounting positions 31112 are formed axially inside the first bearing housing 31111, and a first annular positioning stop 31113 is formed between two adjacent bearing mounting positions 31112.

[0053] At least two first bearings are respectively installed in at least two bearing mounting positions 31112, and the first annular positioning stop 31113 is used for axial positioning of the first bearings.

[0054] A second annular positioning stop 421 is formed on the shaft body 420. The first bearing abuts against the second annular positioning stop 421, and the second annular positioning stop 421 is used to position the first bearing axially.

[0055] Specifically, the second annular positioning stop 421 is used to abut against the first bearing near the second rotor housing 3121.

[0056] With the first bearing near the second rotor housing 3121 abutting against the second annular positioning stop 421, the first annular positioning stop 31113 abutting against the other end of the first bearing near the second rotor housing 3121, thereby achieving axial positioning of the first rotor housing 3111.

[0057] The remaining first bearing is fitted outside the shaft body 420, with its end abutting against the first annular positioning stop 31113. This enables the first rotor assembly 311 to be rotatably connected relative to the shaft body 420.

[0058] The shaft assembly 400 also includes a bracket 430 and a second bearing 440.

[0059] Correspondingly, a second bearing housing 31211 is formed on the second rotor housing 3121.

[0060] The bracket 430 is inserted into the second bearing housing 31211, and the second bearing 440 is installed between the second bearing housing 31211 and the bracket 430.

[0061] The bracket 430 has a first connecting end 431 and a second connecting end 432 at its two ends in the axial direction. The first connecting end 431 is connected to the iron core body 110, and the second connecting end 432 is connected to the shaft body 420.

[0062] A third annular positioning stop 422 is formed on the shaft body 420. When the shaft body 420 is installed in the bracket 430, the second connecting end 432 abuts against the third annular positioning stop 422. The third annular positioning stop 422 is used for axial positioning of the bracket 430.

[0063] The bracket 430 abuts against the third annular positioning stop 422. The second rotor housing 3121 is rotatably connected to the bracket 430 via the second bearing 440. The stator module 100 is connected to the bracket 430. The first bearing seat 31111 is fitted outside the first bearing assembly 410. The end of the first rotor housing 3111 abuts against the end of the second rotor housing 3121.

[0064] The bracket 430 is fitted outside the shaft body 420. The end of the bracket 430 abuts against the third annular positioning stop 422 to axially position the bracket 430 and the shaft body 420. The bracket 430 and the shaft body 420 can be connected by an interference fit so that the bracket 430 and the shaft body 420 are relatively stationary.

[0065] The second bearing housing 31211 is fitted outside the bracket 430 and the shaft body 420, and the second bearing 440 is installed between the second bearing housing 31211 and the bracket 430.

[0066] The second connecting end of the bracket 430 is interference-fitted with the through hole opened at the center of the iron core body 110, so that the bracket 430 and the iron core body 110 are relatively stationary.

[0067] With the core body 110 installed on the bracket 430, the first bearing is installed in the first bearing seat 31111, and the shaft body 420 is installed in the first bearing until the first bearing abuts against the second annular positioning stop 421. The end of the first rotor housing 3111 aligns with the end of the second rotor housing 3121. In this state, the first magnet assembly and the second magnet assembly are housed within the area enclosed by the first rotor housing 3111 and the second rotor housing 3121. The first magnet assembly and the second magnet assembly are respectively arranged adjacent to multiple teeth and multiple yokes located on both sides of the core body 110.

[0068] like Figure 11 As shown, a plurality of heat dissipation holes 433 are spaced apart along the circumference of the bracket 430. Since the heat dissipation holes 433 are spaced apart on the bracket 430, they facilitate the flow of heat generated inside the motor.

[0069] A through-path 434 is formed between the second connection end 432 and the iron core body 110, and the first coil group and the second coil group are electrically connected through the through-path 434.

[0070] In the description of the above embodiments, specific features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples.

[0071] Whenever possible, the various aspects and features described and shown in the specification can be applied individually, and these individual aspects can serve as the subject of a divisional application.

[0072] The above are merely specific embodiments of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A double-sided external rotor motor for a cycling trainer, characterized in that, include: The stator module includes an iron core body and two slot assemblies formed on both sides of the iron core body. The slot assemblies include a plurality of teeth and a plurality of yokes spaced apart along the circumferential direction of the iron core body. Two coil groups are respectively wound around the two wire groove assemblies, and the two coil assemblies are electrically connected; A rotor module includes two rotor assemblies, each of which is disposed adjacent to one of the two slot assemblies. A shaft assembly connected to the stator module; When the coil group is energized, the rotor module can rotate relative to the stator module and the shaft assembly.

2. The double-sided external rotor motor for a cycling trainer according to claim 1, characterized in that, The two rotor assemblies are defined as a first rotor assembly and a second rotor assembly, respectively; The first rotor assembly includes a first rotor housing and a first magnet assembly, wherein the first magnet assembly is connected to one side inside the first rotor housing; The second rotor assembly includes a second rotor housing and a second magnet assembly, the second magnet assembly being connected to one side inside the second rotor housing; The two grooved assemblies are defined as a first grooved assembly and a second grooved assembly, respectively, and the first grooved assembly and the second grooved assembly are respectively formed on both sides of the iron core body; The two coil groups are defined as a first coil group and a second coil group, respectively. The first coil group is fitted outside the first wire groove assembly, and the second coil group is fitted outside the second wire groove assembly. The first rotor housing is installed outside the first coil group and the first wire groove assembly, and the second rotor housing is installed outside the second coil group and the second wire groove assembly.

3. The double-sided external rotor motor for a cycling trainer according to claim 2, characterized in that, The first magnet assembly includes a first magnet retainer and a plurality of first magnets, the plurality of first magnets being arranged at circumferential intervals along the first magnet retainer; The second magnet assembly includes a second magnet retainer and a plurality of second magnets, the plurality of second magnets being arranged at circumferential intervals along the second magnet retainer.

4. The double-sided external rotor motor for a cycling trainer according to claim 3, characterized in that, The first magnet retainer is bonded to the first rotor housing. The first magnet retainer has a plurality of first mounting slots spaced apart along its circumference. The plurality of first magnets are respectively installed in the plurality of first mounting slots. The second magnet retainer is bonded to the second rotor housing. The second magnet retainer has a plurality of second mounting slots spaced apart along its circumference, and the plurality of second magnets are respectively installed in the plurality of second mounting slots.

5. The double-sided external rotor motor for a cycling trainer according to claim 2, characterized in that... The shaft assembly includes a first bearing assembly and a shaft body; A first bearing housing is formed on the first rotor housing; In this configuration, with the first bearing assembly installed in the first bearing housing, the shaft body is installed in the first bearing housing, the first rotor assembly is rotatably connected to the shaft body via the first bearing assembly, and the first bearing assembly is axially positioned with respect to the shaft body.

6. The double-sided external rotor motor for a cycling trainer according to claim 5, characterized in that, The first bearing assembly includes at least two first bearings of different diameters. At least two bearing mounting positions are formed axially within the first bearing housing, and a first annular positioning stop is formed between two adjacent bearing mounting positions; At least two of the first bearings are respectively installed in at least two bearing mounting positions, and the first annular locating stop is used for axial positioning of the first bearings.

7. The double-sided external rotor motor for a cycling trainer according to claim 6, characterized in that, A second annular positioning stop is formed on the shaft body, and the first bearing abuts against the second annular positioning stop. The second annular positioning stop is used to position the first bearing axially.

8. The double-sided external rotor motor for a cycling trainer according to claim 5, characterized in that, The shaft assembly also includes a bracket and a second bearing, wherein a second bearing housing is formed on the second rotor housing; The bracket is inserted into the second bearing housing, and the second bearing is installed between the second bearing housing and the bracket; The bracket has a first connecting end and a second connecting end at its two ends in the axial direction. The first connecting end is connected to the iron core body, and the second connecting end is connected to the shaft body.

9. The double-sided external rotor motor for a cycling trainer according to claim 8, characterized in that, A third annular positioning stop is formed on the shaft body. When the shaft body is installed in the bracket, the second connecting end abuts against the third annular positioning stop. The third annular positioning stop is used for axial positioning of the bracket. The bracket abuts against the third annular positioning stop, the second rotor housing is rotatably connected to the bracket via the second bearing, the stator module is connected to the bracket, the first bearing seat is fitted onto the first bearing assembly, and the end of the first rotor housing abuts against the end of the second rotor housing.

10. The double-sided external rotor motor for a cycling trainer according to claim 8, characterized in that, A through-path is formed between the second connection end and the iron core body, and the first coil group and the second coil group are electrically connected through the through-path; And / or, the bracket is provided with a number of heat dissipation holes.

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