Compact motor bracket with internal wire passing structure

Abstract

The present invention provides a compact motor bracket-type internal wire-passing structure, wherein a stator-rotor module and a planetary module connected in a transmission manner are assembled in the wheel hub, as well as a main side shaft and a secondary side shaft assembled on both sides of the wheel hub. The planetary module is fixed between the connecting structure of the main side shaft and the stator seat. A strip-shaped bracket is connected between the connecting structure and the stator seat. The bracket passes between two adjacent planetary modules of the planetary gear structure. The bracket is machined with a wire-passing groove along its strip structure. The connecting structure is machined with an external wire-passing hole for connecting the stator-rotor module with an external circuit. The side wire-passing hole is connected to the wire-passing groove. The circuits on both sides of the bracket are connected through the side wire-passing hole, the wire-passing groove, and the external wire-passing hole. The independent design of the bracket structure makes the circuit installation more convenient, and the connection and assembly between the components are more convenient and free, which can effectively reduce the assembly cost of the circuit.

Description

Technical Field

[0001] The invention belongs to the technical field of motor wire-passing structures, and in particular relates to a compact motor bracket-type internal wire-passing structure. Background Art

[0002] During the design and manufacturing process, motors are typically integrated with a reduction mechanism in addition to the rotor and stator structures. Depending on the reduction mechanism, their applications vary widely, but a compact structure has always been a common goal for most integrated motors. Taking the integrated motors used in electric bicycles as an example, in order to make the integrated motor structure attached to electric bicycles more compact, various compact structural designs are often required. However, due to the high-speed moving parts inside the motor, a detailed motor design is often impossible. Therefore, in traditional integrated motors, the compact structure can usually only be designed around the motor periphery. This not only makes the motor's external structure overly complex, but also fails to fundamentally solve the problem of compact motor design. In particular, in some motor structures, circuit structures or circuit modules need to be connected to both sides of the motor. Traditionally, these circuit lines are connected through the motor's peripheral structure, which not only makes the circuit longer, but also makes the circuit structure more complex, and not only increases the circuit size and weight. This is very unfavorable for applications with high size and weight requirements, such as bicycle power-assisted motor structures. Summary of the Invention

[0003] In view of the above problems, the present invention provides a compact motor bracket-type internal wire-passing structure which has a simple structure, is easy to install and use, and can pass wires inside an integrated motor.

[0004] The technical solution adopted by the present invention to solve its technical problems is: a compact motor bracket type internal wire structure, which includes a wheel hub, a stator and rotor module and a planetary module connected in a transmission manner are assembled in the wheel hub, and a main side shaft and a secondary side shaft are assembled on both sides of the wheel hub, the main side shaft and the secondary side shaft are connected through a stator seat, a transmission hole is machined in the middle of the stator seat, the output shaft of the rotor in the stator and rotor module is assembled in the transmission hole, the stator seat has two or more planetary modules evenly distributed along the axis, the output shaft is machined with sun gears, and the output shaft is meshed with the planetary modules through the sun gears for transmission; the inner side of the main side shaft is designed There is a connecting structure, the planetary module is fixed between the connecting structure and the stator seat, the planetary module is rotatably coaxially assembled on the planetary shaft, a strip-shaped bracket is connected between the connecting structure and the stator seat, the bracket passes between two adjacent planetary modules of the planetary gear structure, the bracket is processed with a wire groove along its strip structure, the connecting structure is processed with an external wire hole for connecting the stator and rotor modules with external lines, the lower part of the external wire hole is connected to the wire groove of the bracket, the side wire hole is connected to the wire groove, and the circuits on both sides of the bracket are connected through the side wire hole, the wire groove, and the external wire hole.

[0005] Preferably, the outer wire hole is located close to the side of the main side axis, or passes through the main side axis.

[0006] Preferably, the circuit connection wires of the stator in the stator-rotor module pass through the side wire holes, wire grooves, and external wire holes and are connected to the external control module.

[0007] Preferably, the connection structure adopts a flange structure, and the connection structure and the main side shaft are processed as one piece.

[0008] Preferably, the connection structure adopts a frame structure or a hollow structure.

[0009] Preferably, the planetary module comprises two coaxially fixedly connected input planetary gears and output planetary gears, wherein the input planetary gears are meshed with the sun gears on the output shaft for transmission, and the output planetary gears are meshed with the internal gears of the hub for transmission, the diameter of the input planetary gears is larger than the diameter of the output planetary gears, and the bracket passes through between the adjacent output planetary gears.

[0010] Preferably, the output shaft and the sun gear are processed as one piece (ie, the output shaft is a gear shaft), and the sun gear of the output shaft is meshed with the input planetary gear for transmission.

[0011] Preferably, a limiting hole with a countersunk structure is processed at the lower outlet position of the outer wire hole, and an annular limiting column with a limited position assembled in the limiting hole is processed at the upper part of the inner end of the bracket. The middle of the limiting column is hollowed out and connected to the wire groove, and a connecting block is processed at the lower part of the outer end of the bracket, and the connecting block is fixedly connected to the stator seat.

[0012] Preferably, a fixing hole is processed on the connecting block, and a threaded hole corresponding to the fixing hole is designed on the stator seat, and the connecting block is fixed by a bolt passing through the fixing hole.

[0013] Preferably, the upper portion of the bracket is open, and the line is directly assembled into the wire groove of the bracket during assembly. When the bracket is assembled, the upper portion of the bracket is sealed against the lower portion of the flange, allowing the line to pass through the sealed cavity between the bracket and the flange.

[0014] The beneficial effects of the present invention are as follows: the compact motor bracket type internal wire structure is mainly used in electric power-assisted bicycles. When the motor is designed and assembled, a connection circuit is designed on one side of the stator inside the motor. In the motor, by adopting a planetary transmission structure and utilizing the gap between adjacent planetary gears in the planetary transmission structure, a gap structure that can be embedded in the traditional planetary reduction structure is designed to complete the circuit connection structure. The passing line is guided and protected by a specific bracket structure. The bracket can be assembled inside the planetary structure without taking up extra space, making the line shorter, the connection convenient, and the electrical connection more stable. At the same time, this internal circuit connection method, due to the guidance and accommodation of the wire groove structure inside the bracket, not only the line is the shortest, but also different lines are not easy to explode when multiple lines are connected, which can effectively reduce the damage to the circuit and increase the service life of the motor. At the same time, the independent design of the bracket structure makes the installation of the line more convenient, and the connection and assembly between the components are more convenient and free, which can effectively reduce the assembly cost of the circuit. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 Schematic diagram of the front view of the compact motor bracket internal wire structure.

[0016] Figure 2 yes Figure 1 Schematic diagram of the structure in the AA direction.

[0017] Figure 3 It is a schematic diagram of the three-dimensional assembly structure of a compact motor bracket-type internal wire-passing structure.

[0018] Figure 4 It is a structural diagram of the front side of the bracket.

[0019] Figure 5 It is a schematic diagram of the side structure. DETAILED DESCRIPTION

[0020] The present invention will be further described below in conjunction with the embodiments: Figure 1 、 Figure 2 and Figure 3 In the illustrated embodiment, this compact motor bracket-style internal wire structure is primarily used in hub motors with planetary transmissions. It comprises a hub, within which are mounted a stator-rotor module 1 and planetary modules 2, which are connected in a transmission manner. A primary shaft 3 and a secondary shaft are mounted on either side of the hub. The primary and secondary shafts 3 and 3 are connected by a stator base 4, which has a transmission hole machined in the center. The output shaft 11 of the rotor in the stator-rotor module 1 is mounted within this hole. This motor utilizes an internal rotor structure, with electrical output power being delivered from the output shaft 11. Two or more planetary modules 2 are arranged annularly on the stator base 4 along its axis. The output shaft 11 is machined with sun gears, which mesh with the planetary modules 2 for transmission. An internal ring gear is designed on the inside of the hub, which drives the planetary modules 2. The sun gears and the planetary modules form a planetary transmission structure. The electrical power from the output shaft 11 is transmitted to the hub via a planetary gear structure, enabling the hub to rotate. In this embodiment, the hub motor is mainly used in electric power-assisted bicycles, and its main side shaft 3 and auxiliary side shaft structure are used to connect to the bicycle frame. In the specific design, the inner side of the main side shaft 3 is designed with a connecting structure 31. The connecting structure 31 can use a flange, a frame or other hollow structure. In this embodiment, the connecting structure 31 uses a flange structure. The planetary module is fixed between the connecting structure 31 and the stator seat 4. The planetary module 2 is rotatably coaxially assembled on the planetary shaft, that is, the planetary module 2 can rotate relative to the planetary shaft. The difference between the present invention and the traditional structure is that a strip-shaped bracket 5 is connected between the connecting structure 31 and the stator seat 4. The bracket 5 passes between two adjacent planetary modules 2 of the planetary gear structure. The bracket 5 is processed with a wire groove 51 along its strip structure, and the connecting structure 31 is processed with an external wire hole 32 for connecting the stator and rotor modules 1 with external lines. In this embodiment, the connecting structure 31 is machined with an external wire hole 32 extending through it near the main-side shaft 3. The external wire hole 32 can also be a through hole extending through the main-side shaft 3, and the specific structure is determined according to actual conditions. The lower portion of the external wire hole 32 is connected to the wire slot 51 of the bracket 5. The side of the stator base 4 is machined with a side wire hole 41, which is connected to the wire slot 51. The circuit wires 6 on both sides of the bracket 5 pass through the side wire hole 41, the wire slot 51, and the external wire hole 32.

[0021] This compact motor bracket-type internal wire-passing structure is mainly used in the motor of an electric power-assisted bicycle. When the motor is designed and assembled, a connection circuit is designed on one side of the motor stator. In this motor, by adopting a planetary transmission structure, the gap between adjacent planetary gears in the planetary transmission structure is utilized to design a gap structure that can be embedded in the traditional planetary reduction structure to complete the circuit connection structure. The passing wire is guided and protected by a specific bracket 5 structure. The bracket 5 can be assembled inside the planetary structure without taking up additional space, making the wire shorter, easier to connect, and the electrical connection more stable. At the same time, this internal circuit connection method passes the wire through the external wire-passing hole 32 at the flange position of the main side shaft 3. Because it is guided and accommodated by the internal wire-passing groove 51 structure of the bracket 5, not only the wire is the shortest, but also different wires are not easily broken when multiple wires are connected, which can effectively reduce the damage of the circuit and increase the service life of the motor. At the same time, the independent design of the bracket structure makes the installation of the wire more convenient and the connection and assembly between the components more convenient and free, which can effectively reduce the assembly cost of the circuit. In the specific connection, the circuit line 6 of the stator in the stator-rotor module passes through the side wire hole 41, the wire groove 51, and the outer wire hole 32 and is connected to the external control module.

[0022] In this embodiment, if Figure 2 and Figure 3 As shown, the connecting structure 31 adopts a flange structure, and the connecting structure 31 is processed integrally with the main side shaft 3. This can effectively ensure the strength of the connecting structure 31, while ensuring the processing accuracy on the main side shaft 3 and the connecting structure 31, making the device size more accurate.

[0023] In the specific design, such as Figure 1-3 As shown, the planetary module 2 includes two coaxially fixedly connected input planetary gears 21 and output planetary gears 22. The input planetary gears 21 mesh with the sun teeth on the output shaft 11, and the output planetary gears 22 mesh with the internal teeth of the hub. The diameter of the input planetary gears 21 is larger than that of the output planetary gears 22, and the bracket 5 passes between adjacent output planetary gears 22. This is equivalent to adding a reduction structure to the original planetary reduction structure, resulting in a higher reduction ratio. At the same time, the small size of the output planetary gears 22 makes it easier to assemble the bracket 5 between adjacent output planetary gears 22. The input planetary gears 21 and output planetary gears 22 are machined integrally. This reduces the number of parts to be assembled, making assembly more convenient, while ensuring the connection strength between the input planetary gears 21 and the output planetary gears 22 and the overall machining accuracy.

[0024] The output shaft 11 and the sun gear are integrally machined, meaning the output shaft 11 is a gear shaft. The sun gear of the output shaft 11 meshes with the input planetary gear 21. This gear shaft design allows for a more compact transmission design while effectively ensuring the precision and connection strength between the sun gear and the output shaft 11. This reduces the number of parts and facilitates assembly.

[0025] In the specific design, such as Figure 4 and Figure 5 As shown, a countersunk limiting hole 33 is machined at the lower exit position of the outer wire hole 32. An annular limiting post 52 is machined on the upper inner end of the bracket 5 to be limitedly assembled within the limiting hole. The center of the limiting post 52 is hollowed out and communicates with the wire groove 51. A connecting block 53 is machined on the lower outer end of the bracket 5, and the connecting block 53 is fixedly connected to the stator base 4. The combination of the limiting hole 33 and the limiting post 52 allows the bracket 5 structure to achieve positioning of the connection structure 31, i.e., the flange position. When the positioning structure is assembled, the bracket 5 can rotate around the limiting hole 33 to a certain angle, facilitating overall assembly.

[0026] During the specific design, when the other end of the bracket 5 is assembled, a fixing hole 54 is machined into the connecting block 53. The stator base 4 is designed with a threaded hole corresponding to the fixing hole 54. The connecting block 53 is secured by a bolt passing through the fixing hole 54. The bolt structure locks the connecting block 53 of the bracket 5, and combined with the positional positioning of the bracket 5's limiting post 52, the bracket 5 is fully fixed in position, ensuring that the bracket 5 is fixed in the motor.

[0027] The upper portion of the bracket 5 is open, allowing the wiring to be directly assembled into the wire channel 51 of the bracket 5. Once the bracket 5 is assembled, the upper portion of the bracket 5 seals against the lower portion of the connecting structure 31, allowing the wiring to pass through the sealed cavity between the bracket 5 and the connecting structure 31, facilitating the overall wiring layout.

[0028] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A compact motor bracket type internal wire structure, comprising a hub, wherein a stator-rotor module (1) and a planetary module (2) connected in a transmission manner are assembled in the hub, and a main side shaft (3) and a secondary side shaft assembled on both sides of the hub, wherein the main side shaft (3) and the secondary side shaft are connected through a stator seat (4), a transmission hole is machined in the middle of the stator seat (4), an output shaft (11) of the rotor in the stator-rotor module (1) is assembled in the transmission hole, two or more planetary modules (2) are evenly distributed in an annular manner along the axis on the stator seat (4), a sun tooth is machined on the output shaft (11), and the output shaft is meshed with the planetary module (2) through the sun tooth for transmission; a connecting structure (31) is designed on the inner side of the main side shaft (3), the planetary module is fixed between the connecting structure (31) and the stator seat (4), and the planetary module (2) is rotatably coaxially assembled on the planetary shaft, characterized in that: A strip-shaped bracket (5) is connected between the connecting structure (31) and the stator seat (4), and the bracket (5) passes between two adjacent planetary modules (2) of the planetary gear structure. A wire groove (51) along the strip-shaped structure is processed on the bracket (5), and an external wire hole (32) for connecting the stator and rotor modules (1) with external circuits is processed on the connecting structure (31). The lower part of the external wire hole (32) is connected to the wire groove (51) of the bracket (5). A side wire hole (41) is processed on the side of the stator seat (4), and the side wire hole (41) is connected to the wire groove (51). The circuit lines (6) on both sides of the bracket (5) pass through the side wire hole (41), the wire groove (51), and the external wire hole (32) for connection.

2. The compact motor bracket internal wire-passing structure according to claim 1, characterized in that: The outer wire hole (32) is located close to the side of the main side shaft (3), or passes through the main side shaft (3).

3. The compact motor bracket type inner wire passing structure according to claim 1 or 2, characterized in that: The connection structure (31) adopts a flange structure, and the connection structure (31) and the main side shaft (3) are processed as one piece.

4. The compact motor bracket internal wire-passing structure according to claim 1 or 2, characterized in that: The connection structure (31) adopts a frame structure or a hollow structure.

5. The compact motor bracket type inner wire passing structure according to claim 1 or 2, characterized in that: The planetary module (2) comprises two coaxially fixedly connected input planetary gears (21) and output planetary gears (22); the input planetary gears (21) are meshed with the sun teeth on the output shaft (11) for transmission, and the output planetary gears (22) are meshed with the internal teeth of the wheel hub for transmission; the diameter of the input planetary gears (21) is larger than the diameter of the output planetary gears (22); and the bracket (5) passes between adjacent output planetary gears (22).

6. The compact motor bracket internal wire-passing structure according to claim 5, characterized in that: The input planetary gear (21) and the output planetary gear (22) are processed as one piece.

7. The compact motor bracket internal wire-passing structure according to claim 5, characterized in that: The output shaft (11) and the sun gear are processed as one piece, and the sun gear of the output shaft (11) is meshed with the input planetary gear (21) for transmission.

8. The compact motor bracket internal wire-passing structure according to claim 1, characterized in that: A countersunk limiting hole (33) is machined at the lower outlet position of the outer wire hole (32); an annular limiting column (52) is machined on the upper portion of the inner end of the bracket (5) and is limitedly assembled in the limiting hole; the middle of the limiting column (52) is hollowed out and communicated with the wire groove (51); a connecting block (53) is machined on the lower portion of the outer end of the bracket (5); and the connecting block (53) is fixedly connected to the stator seat (4).

9. The compact motor bracket type inner wire passing structure according to claim 8, characterized in that: A fixing hole (54) is machined on the connecting block (53), a threaded hole corresponding to the fixing hole (54) is designed on the stator seat (4), and the connecting block (53) is fixed by a bolt passing through the fixing hole (54).

10. The compact motor bracket type inner wire passing structure according to claim 1, characterized in that: The upper portion of the bracket (5) is designed to be open, and the line is directly assembled into the line groove (51) of the bracket (5) during assembly. After the bracket (5) is assembled, the upper portion of the bracket (5) is sealed and fitted with the lower portion of the connecting structure (31).

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