Hub motor wire outlet structure

Abstract

The invention relates to a hub motor wire outlet structure which is composed of a hub motor and a wire outlet set, the wire outlet set is provided with a motor connector and a wire connector, and a load end circuit board of the motor connector and a power supply end circuit board of the wire connector can be connected through a plurality of terminal bridging columns to form a modular structure. According to the utility model, the assembly firmness and the alignment accuracy can be effectively improved, the assembly during installation can be facilitated, the use safety can be effectively improved, and meanwhile, the occupied area of the whole wire group can be reduced.

Description

Technical field

[0001] The present invention belongs to the technical field of electric vehicle wheel hubs, specifically a modular wheel hub motor wiring structure that can improve assembly firmness and alignment accuracy, enhance its waterproof and dustproof effects, and effectively enhance its safety in use. [Background Technology]

[0002] Bicycles have become a popular means of transportation and leisure in recent years. With technological advancements and increased battery capacity, electric-assisted bicycles, which utilize motors to supplement human power, have become increasingly common. Electric-assisted bicycles primarily utilize pedaling force combined with assistance from a power output mechanism (such as a hub motor) to generate forward motion, reducing rider strain. Hub motors for electric-assisted bicycles are categorized as either inner-rotor or outer-rotor types. Inner-rotor hub motors, because the stator is located near the outer side of the hub shell, coil heat dissipation is easier. Furthermore, because the rotor is located inward, near the hub axle, they offer the advantages of low moment of inertia and ease of driving.

[0003] Because the signal cables and power cables used for control in the inner rotor wheel housing motor must be connected from the control system and power system on the external frame to the motor inside the wheel housing motor, the existing method involves individually threading the signal and power cables through the wheel hub axle and then connecting them in series with the corresponding motor. This makes the cable assembly difficult to assemble, and the fixation and alignment are poor, making it difficult to effectively protect against water and dust. Furthermore, the need to connect the signal and power cables one by one after the entire assembly, while considering the space and convenience of the assembly, also increases the cable assembly's size, and may even cause damage and shorten its lifespan, seriously affecting the safety of subsequent riding of the e-assisted bicycle.

[0004] In other words, the existing in-wheel motor's wire assembly structure is not well designed, resulting in problems such as difficulty in wire assembly, large space requirements, and insufficient safety. [Summary of the invention]

[0005] Therefore, the main purpose of the present invention is to provide a hub motor outlet structure, which can form a modular structure of the outlet connector, thereby improving the assembly firmness and alignment accuracy, and facilitating assembly during installation.

[0006] A second main purpose of the present invention is to provide a hub motor wire outlet structure that can effectively enhance its waterproof and dustproof effects, effectively improve its safety in use, and further extend its service life.

[0007] Another main purpose of the present invention is to provide a hub motor wire output structure that can reduce the footprint of the entire wire assembly, further improving the convenience of assembly operations, and at the same time reducing the weight of the entire electric-assisted bicycle.

[0008] Based on this, the present invention mainly achieves the aforementioned purpose and its efficacy through the following technical means, which is applied to a frame of an electric power-assisted bicycle, and the hub motor output structure includes:

[0009] A hub motor having a hub axle at its axis. The hub motor utilizes an inner cover assembly to mount a motor assembly on the hub axle for generating a force to drive a hub shell that rotates relative to the hub axle. The inner cover assembly has a mounting groove formed on an outer edge of one closed end that is coaxial with the hub axle, and the mounting groove has at least one first positioning portion. The inner cover assembly also has at least one wire outlet hole for allowing at least one wire of the motor assembly of the hub motor to pass through.

[0010] An outlet wire assembly passes through the hub shaft and is disposed in the mounting slot of the inner cover. The outlet wire assembly has a motor connector and a wire connector.

[0011] The motor connector axis has an axial hole corresponding to the hub shaft, and the motor connector has an abutment piece on the side corresponding to the inner cover, and the abutment piece is formed with a mounting groove on the surface corresponding to the inner cover for assembling a load-end circuit board of a corresponding shape. The motor connector is formed with a plurality of terminal guide holes passing through both ends on the periphery adjacent to the axial hole. The terminal guide holes can respectively allow the corresponding plurality of terminal bridge posts to be inserted. The abutment piece of the motor connector has a second positioning portion corresponding to the first positioning portion on the surface, and the load-end circuit board is printed with a plurality of load contacts for connecting the wire of the motor group and a plurality of terminal contacts corresponding to the terminal guide holes. A conductive line is formed between the load contacts and the terminal contacts respectively. The end surface of the motor connector is formed with a guide rod and a limit arc piece respectively, so that the aforementioned wire connector can be accurately aligned.

[0012] The axis of the wire connector has an axial hole corresponding to the hub shaft, and the wire connector has an assembly groove on the side corresponding to the motor connector for installing a terminal base, and the wire connector has a connector part for docking a wire bundle body, and the axis of the terminal base has an axial hole corresponding to the hub shaft, and the terminal base has a plurality of terminal guide holes corresponding to the terminal guide holes on the motor connector, the guide rod and the limiting arc piece, a guide hole and a limiting arc groove, and the terminal base has a first embedding part on the side corresponding to the wire connector for installing a power supply end circuit board, the power supply end circuit board has a second embedding part corresponding to the first embedding part, and the power supply end circuit board has a plurality of terminal guide holes corresponding to the terminal guide holes of the terminal base for the aforementioned terminal bridging column to pass through, and the ends of the terminal bridging columns can be used for connecting the wires in the aforementioned wire bundle body.

[0013] Thus, the hub motor output structure of the present invention can be connected to each other by the load-end circuit board of the motor connector and the power supply-end circuit board of the wire connector in the output group using the multiple terminal bridging columns to form a modular structure, which can effectively improve the firmness and alignment accuracy of the assembly, making it easier to assemble during installation, and can also effectively improve its waterproof and dustproof effects, effectively enhance its safety in use, and further extend its service life. At the same time, it can reduce the footprint of the entire wire group, further enhance the convenience of assembly operations, and at the same time reduce the weight of the entire electric-assisted bicycle, which can greatly improve its practicality and achieve its economic benefits.

[0014] The present invention further achieves the aforementioned objectives and effects by utilizing the following technical means:

[0015] Preferably, the first positioning portion of the inner cover body can be a hole-shaped, and the second positioning portion of the motor connector can be a column-shaped portion relative to the first positioning portion, so that the motor connector can be accurately positioned in the installation groove of the inner cover body.

[0016] Preferably, a plurality of limiting notches communicating with the mounting slot are formed on the surface of the abutting piece of the motor connector, and the limiting notches correspond to the wire outlet holes of the inner cover, respectively. The load-end circuit board also has limiting extension pieces corresponding to the limiting notches of the mounting slot, so that the load-end circuit board can be accurately aligned and installed in the mounting slot of the motor connector.

[0017] Preferably, at least one control circuit board is provided on the inner cover, and the load-end circuit board is printed with the load contact for connecting to the control circuit board wire.

[0018] Preferably, the motor connector is provided with a bearing seat extending from one end of the inner cover body for assembling a bearing so as to utilize the bearing to support the hub shell outside the hub motor.

[0019] Preferably, a waterproof ring gasket is sandwiched between the bearing seat of the motor connector and the wire connector, and the waterproof ring gasket has a plurality of terminal guide holes corresponding to the terminal guide holes on the motor connector, the guide rod and the limiting arc piece, a guide hole and a limiting arc groove.

[0020] Preferably, the bearing seat of the motor joint is provided with a dustproof ring between the bearing and the hub shell to achieve the purpose of waterproof and dustproof.

[0021] Preferably, at least one cog is formed on the periphery of the terminal base, so that the terminal base can be enclosed in the wire connector by injection molding.

[0022] Preferably, at least one first limiting portion is formed at each end of the hub shaft, so that when the hub motor is assembled to the frame using the hub shaft, it is fixed using a locking plate with a second limiting hole.

Brief Description of the Drawings

[0023] Figure 1 It is a three-dimensional schematic diagram of the outlet structure of the hub motor of the present invention.

[0024] Figure 2 This is a schematic three-dimensional appearance diagram of the hub motor output structure of the present invention from another perspective.

[0025] Figure 3 This is a schematic exploded perspective view of the hub motor output structure of the present invention, illustrating the main components and their relative relationships.

[0026] Figure 4 This is a schematic exploded perspective view of the hub motor wire output structure of the present invention from another perspective.

[0027] Figure 5 This is a schematic diagram of the appearance of an electric-assisted bicycle using the hub motor output structure of the present invention.

[0028] Figure 6 This is a cross-sectional schematic diagram of the hub motor output structure of the present invention applied to an electric-assisted bicycle, illustrating its internal components and their relative relationships. Explanation of symbols 10: Outgoing line group 20: Motor connector 21: shaft hole 22: Sticking piece 220: Install the bezel 221: Limit gap 222: Second positioning portion 23: Terminal guide hole 24: Terminal bridge column 25: Load end circuit board 250: Control circuit board 251: Load contact 252:Terminal contact 253: Conductor wire 254:Limiting extension piece 26: Bearing seat 260: Bearing 271:Guide rod 272: Limiting arc piece 28: Waterproof ring gasket 281:Terminal guide hole 282: Guide hole 283: Limiting arc groove 29: Dustproof ring 30: Wire connector 31: shaft hole 32:Assembly slot 33: Joint 35: Terminal base 350: shaft hole 351: Terminal guide hole 352: Guide hole 353: Limiting arc groove 355: cog 356: first locking portion 36: Power supply circuit board 360: Second interlocking portion 361: Terminal guide hole 40: Wire bundle 50: wheel hub shell 60: Hub motor 61: Inner cover 62: Motor group 63: Installation slot 64: first positioning portion 65: Wire outlet 66: Hub shaft 660: first limiting portion 67: Locking piece 68: Second limiting hole 80: Frame [Specific implementation method]

[0029] This invention relates to a hub motor cable outlet structure. In the accompanying drawings illustrating specific embodiments of the invention and its components, all references to front and rear, left and right, top and bottom, upper and lower, and horizontal and vertical are for ease of description only and are not intended to limit the invention or its components to any particular position or spatial orientation. Dimensions specified in the drawings and description may vary according to the design and requirements of the invention without departing from the scope of the claims.

[0030] The hub motor output structure of the present invention is used to drive an electric bicycle or electric vehicle, such as Figure 1 、 2 5, it is composed of a hub motor 60 and an outlet group 10 provided on the frame 80 of the electric bicycle or the electric vehicle, wherein the hub motor 60 has a hub shaft 66 at the axis center, the hub motor 60 has a cup-shaped inner cover 61, and the inner cover 61 has a motor group 62 for generating a force to drive a hub shell 50 rotating relative to the hub shaft 66 (as shown in FIG. Figure 5 、 6 As shown, the inner cover 61 has a mounting groove 63 formed on the outer edge of one closed end, which is coaxial with the hub axle 66. The mounting groove 63 has at least one first positioning portion 64. The first positioning portion 64 can be hole-shaped or column-shaped. The present invention mainly uses two hole-shaped first positioning portions 64 as the main embodiment for mounting and positioning the outlet wire assembly 10. The inner cover 61 has at least one outlet hole 65 for passing at least one wire of the motor assembly 62 of the hub motor 60. The wire can be a signal wire for control and a power wire for power supply. At least one first limiting portion 660 is formed at each end of the hub axle 66. When the hub motor 60 is assembled to the frame 80 using the hub axle 66, it is fixed using a locking piece 67 with a second limiting hole 68.

[0031] The outlet assembly 10 is composed of a motor connector 20 and a wire connector 30. For the detailed structure of the outlet assembly 10, please refer to Figure 3 、 45, wherein the axis of the motor connector 20 has an axial hole 21 corresponding to the hub shaft 66, and the motor connector 20 has a contact piece 22 on the side corresponding to the inner cover 61, and the contact piece 22 has a mounting groove 220 formed on the surface corresponding to the inner cover 61 for assembling a load end circuit board 25 of a corresponding shape, and the contact piece 22 has a plurality of limiting notches 221 connected to the mounting groove 220 on the surface corresponding to the inner cover 61, and the limiting notches 221 respectively correspond to the inner The outlet hole 65 of the housing 61 is formed with a plurality of terminal guide holes 23 extending through the motor connector 20 at the periphery adjacent to the shaft hole 21. The terminal guide holes 23 can be respectively inserted with a plurality of terminal bridge posts 24. The terminal guide holes 23 and the terminal bridge posts 24 can have different diameters according to the signal or power transmission. The load-side circuit board 25 has a limit extension piece 254 corresponding to the limit notch 221 of the mounting slot 220, so that the load-side circuit board 25 can be accurately positioned. The motor connector 20 is mounted in the mounting groove 220, and the surface of the contact piece 22 of the motor connector 20 has a second positioning portion 222 corresponding to the first positioning portion 64 of the inner cover 61. The second positioning portion 222 can be a column or a hole relative to the first positioning portion 64. The present invention uses two columnar second positioning portions 222 as the main embodiment, so that the motor connector 20 can be accurately positioned in the mounting groove 63 of the inner cover 61. At least one control circuit board 2 is provided on the inner cover 61. 50, and the load-end circuit board 25 is printed with a plurality of load contacts 251 for connecting the motor group 62 or the control circuit board 250 wires and a plurality of terminal contacts 252 corresponding to the terminal guide holes 23, and a conductive line 253 is formed between the load contacts 251 and the terminal contacts 252. In addition, the motor connector 20 is different from the inner cover 61 and extends to a bearing seat 26 for assembling a bearing 260 to support the hub shell 50 outside the hub motor 60 by using the bearing 260. Figure 6 As shown, the hub shell 50 can rotate freely relative to the motor connector 20. The end surfaces of the bearing seat 26 of the motor connector 20 are respectively formed with a guide rod 271 and a limiting arc piece 272, which can allow the aforementioned wire connector 30 to be accurately aligned. A waterproof ring gasket 28 is sandwiched between the bearing seat 26 and the wire connector 30. The waterproof ring gasket 28 has a plurality of terminal guide holes 281 corresponding to the terminal guide holes 23, the guide rod 271 and the limiting arc piece 272 on the motor connector 20, a guide hole 282 and a limiting arc groove 283. Furthermore, the bearing seat 26 of the motor connector 20 is sandwiched with a dustproof ring 29 between the bearing 260 and the hub shell 50 to achieve the purpose of waterproofing and dustproofing;

[0032] The axis of the wire connector 30 has an axial hole 31 corresponding to the hub shaft 66, and the wire connector 30 has an assembly groove 32 on the side corresponding to the motor connector 20 for covering a terminal base 35 by injection molding. The wire connector 30 has a connector portion 33 for docking a wire bundle body 40, and the axis of the terminal base 35 has an axial hole 350 corresponding to the hub shaft 66, and the terminal base 35 has a plurality of terminal guide holes 351 corresponding to the terminal guide holes 23 on the motor connector 20, the guide rod 271 and the limiting arc piece 272, a guide hole 352 and a limiting arc groove 353, so that the wire connector 30 can use the terminal base 35 to accurately dock the motor The connector 20 has at least one cog 355 formed around the terminal base 35. Furthermore, the terminal base 35 has a first locking portion 356 on a side corresponding to the wire connector 30 for mounting a power supply circuit board 36. The power supply circuit board 36 has a second locking portion 360 corresponding to the first locking portion 356 of the terminal base 35, allowing the power supply circuit board 36 to be accurately positioned. Furthermore, the power supply circuit board 36 has a plurality of terminal guide holes 361 corresponding to the terminal guide holes 351 of the terminal base 35 for the aforementioned terminal bridge posts 24 to pass through. The ends of the terminal bridge posts 24 can be connected to the signal lines or power lines within the wire bundle 40.

[0033] In this way, a hub motor output structure that is modular and easy to assemble is formed.

[0034] As for the actual operation of the hub motor output structure of the present invention, it is as follows Figure 1-6 As shown, the power supply circuit board 36 is assembled on the terminal base 35, and the terminal bridging posts 24 connected to the wire bundle 40 are inserted one by one on the power supply circuit board 36 and the terminal base 35. Then, the terminal base 35 is placed in the mold of the wire connector 30, and the wire connector 30 with the terminal bridging posts 24 is formed by injection molding technology.

[0035] In addition, the load-end circuit board 25 is assembled on the motor connector 20, and the bearing 260 and the dustproof ring gasket 29 are arranged on the bearing seat 26 of the motor connector 20. Then, the terminal bridge posts 24 of the wire connector 30 are passed through the waterproof ring gasket 28 and the motor connector 20, and the other ends of the terminal bridge posts 24 are docked with the corresponding terminal contacts 252 of the load-end circuit board 25. In this way, the motor connector 20 can be assembled in the mounting groove 63 of the inner cover 61, and the signal line and the power line of the motor group 62 in the inner cover 61 are connected to the load contact 251 of the load-end circuit board 25 via the control circuit board 250. Finally, as shown in FIG. Figure 5 、 6As shown, the hub shell 50 is assembled outside the hub motor 60, and the fork rods on both sides of the frame 80 are assembled on the hub shaft 66 of the hub motor 60, so that the output cable assembly 10 can be accurately and quickly assembled on the hub motor 60 with a modular structure.

[0036] Through the aforementioned design and description, the hub motor output structure of the present invention can be interconnected by the load-end circuit board 25 of the motor connector 20 and the power-end circuit board 36 of the wire connector 30 in the output cable assembly 10 using the plurality of terminal bridging posts 24, thereby forming a modular structure. This can effectively improve the firmness and alignment accuracy of the assembly, making it easier to assemble during installation. Furthermore, it can effectively enhance its waterproof and dustproof effects, effectively improve its safety in use, and further extend its service life. At the same time, it can reduce the footprint of the entire wire assembly, further improve the convenience of assembly operation, and at the same time reduce the weight of the entire electric-assisted bicycle.

Claims

1. A hub motor outlet structure, characterized in that , which is applied to a frame of an electric power-assisted bicycle, the hub motor outlet structure includes: A hub motor having a hub axle at its axis. The hub motor utilizes an inner cover assembly to mount a motor assembly on the hub axle for generating a force to drive a hub shell that rotates relative to the hub axle. The inner cover assembly has a mounting groove formed on an outer edge of one closed end that is coaxial with the hub axle, and the mounting groove has at least one first positioning portion. The inner cover assembly also has at least one wire outlet hole for allowing at least one wire of the motor assembly of the hub motor to pass through. An outlet wire assembly passes through the hub shaft and is disposed in the mounting slot of the inner cover. The outlet wire assembly has a motor connector and a wire connector. The motor connector axis has an axial hole corresponding to the hub shaft, and the motor connector has an abutment piece on the side corresponding to the inner cover, and the abutment piece is formed with a mounting groove on the surface corresponding to the inner cover for assembling a load-end circuit board of a corresponding shape. The motor connector is formed with a plurality of terminal guide holes passing through both ends on the periphery adjacent to the axial hole. The terminal guide holes can respectively allow the corresponding plurality of terminal bridge posts to be inserted. The abutment piece of the motor connector has a second positioning portion corresponding to the first positioning portion on the surface, and the load-end circuit board is printed with a plurality of load contacts for connecting the wire of the motor group and a plurality of terminal contacts corresponding to the terminal guide holes. A conductive line is formed between the load contacts and the terminal contacts respectively. The end surface of the motor connector is respectively formed with a guide rod and a limit arc piece to allow the aforementioned wire connector to be accurately aligned. The axis of the wire connector has an axial hole corresponding to the hub shaft, and the wire connector has an assembly groove on the side corresponding to the motor connector for installing a terminal base, and the wire connector has a connector part for docking a wire bundle body, and the axis of the terminal base has an axial hole corresponding to the hub shaft, and the terminal base has a plurality of terminal guide holes corresponding to the terminal guide holes on the motor connector, the guide rod and the limiting arc piece, a guide hole and a limiting arc groove, and the terminal base has a first embedding part on the side corresponding to the wire connector for installing a power supply end circuit board, the power supply end circuit board has a second embedding part corresponding to the first embedding part, and the power supply end circuit board has a plurality of terminal guide holes corresponding to the terminal guide holes of the terminal base for the aforementioned terminal bridging column to pass through, and the ends of the terminal bridging columns can be used for connecting the wires in the aforementioned wire bundle body.

2. The hub motor outlet structure according to claim 1, characterized in that , wherein the first positioning portion of the inner cover body can be hole-shaped, and the second positioning portion of the motor connector can be column-shaped relative to the first positioning portion, so that the motor connector can be accurately positioned in the installation groove of the inner cover body.

3. The hub motor outlet structure according to claim 1, characterized in that The surface of the abutting piece of the motor connector is formed with a plurality of limiting notches connected to the mounting groove, and the limiting notches respectively correspond to the outlet holes of the inner cover, and the load-end circuit board respectively has limiting extension pieces corresponding to the limiting notches of the mounting groove, so that the load-end circuit board can be accurately aligned and installed in the mounting groove of the motor connector.

4. The hub motor outlet structure according to claim 1, characterized in that , wherein at least one control circuit board is provided on the inner cover, and the load-end circuit board is printed with the load contact connected to the control circuit board wire.

5. The hub motor outlet structure according to claim 1, characterized in that , wherein the motor connector is different from the inner cover and has a bearing seat extending from one end thereof, for assembling a bearing to support the hub shell outside the hub motor by using the bearing.

6. The hub motor outlet structure according to claim 5, characterized in that A waterproof ring gasket is sandwiched between the bearing seat of the motor connector and the wire connector, and the waterproof ring gasket has a plurality of terminal guide holes corresponding to the terminal guide holes on the motor connector, the guide rod and the limiting arc piece, a guide hole and a limiting arc groove.

7. The hub motor outlet structure according to claim 5, characterized in that The bearing seat of the motor joint is provided with a dustproof ring between the bearing and the hub shell to achieve the purpose of waterproof and dustproof.

8. The hub motor outlet structure according to claim 1, characterized in that , wherein the terminal base is formed with at least one cog at its periphery, so that the terminal base can be enclosed in the wire connector by injection molding.

9. The hub motor outlet structure according to claim 1, characterized in that , wherein at least one first limiting portion is formed at each end of the hub shaft, for the hub motor to be fixed using a locking plate with a second limiting hole when being assembled to the frame using the hub shaft.

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