Hub motor wire outlet structure

Abstract

The utility model relates to a hub motor wire outlet structure, which comprises a hub motor and a wire outlet group, the wire outlet group 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 with each other 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] This utility model belongs to the field of wheel hub technology for electric vehicles, specifically referring to a modular wheel hub motor cable outlet structure, which can improve the firmness and alignment accuracy of assembly, enhance its waterproof and dustproof effect, and effectively improve its safety in use. Background Technology

[0002] Bicycles have become a popular mode of transportation and leisure in recent years. With technological advancements and increased battery capacity, electric-assist bicycles, which use motors to assist human power, are now widely used. Electric-assist bicycles primarily utilize the pedaling force combined with the assistance of a power output mechanism (such as a hub motor) to generate forward momentum, thus reducing the burden of riding. The hub motors of these electric-assist bicycles are divided into internal rotor and external rotor types. Internal rotor hub motors, with their stator located near the outer side of the hub housing, allow for easier dissipation of coil heat. Furthermore, the rotor, located near the inner side of the hub axle, offers advantages such as low rotational inertia and ease of operation.

[0003] Because the control signal lines and power lines in the wheel hub motor of the internal rotor need to be connected to the motor inside the wheel hub motor by the control system and power system on the external frame, the current method is to pull the signal lines and power lines one by one through the wheel hub axle and then connect them in series with the relevant motor. Therefore, the installation of the wiring assembly is not only difficult to assemble, but also has poor fixation and inaccurate alignment. It also cannot effectively perform waterproofing and dustproofing. After the overall installation, the signal lines and power lines need to be connected one by one. Considering the assembly space and convenience, this also increases the footprint of the entire wiring assembly, and may even cause it to be easily damaged and have a short service life, which seriously affects the safety of riding the electric-assisted bicycle.

[0004] In other words, the existing hub motor's wiring harness structure design is not perfect, resulting in difficulties in assembling the wiring harness, as well as problems such as large footprint and insufficient safety. Utility Model Content

[0005] Therefore, the main objective of this utility model is to provide a hub motor cable outlet structure that enables the cable outlet connector to form a modular structure, thereby improving the assembly firmness and alignment accuracy, and facilitating assembly during installation.

[0006] The secondary objective of this utility model is to provide a hub motor cable outlet structure that can effectively improve its waterproof and dustproof performance, enhance its safety in use, and further extend its service life.

[0007] Another major objective of this utility model is to provide a hub motor cable exit structure that can reduce the footprint of the entire cable assembly, further improve the convenience of assembly operations, and at the same time reduce the overall weight of the electric-assist bicycle.

[0008] Based on this, the present invention mainly achieves the aforementioned objectives and effects through the following technical means, and is applied to the frame of an electric-assisted bicycle. The hub motor cable outlet structure includes:

[0009] A hub motor has a hub shaft at its center. The hub motor has a motor assembly mounted on the hub shaft using an inner cover assembly to generate force to drive a hub housing that rotates relative to the hub shaft. The inner cover has a mounting groove coaxial with the hub shaft on the outer edge of the closed end side, and the mounting groove has at least one first positioning part. The inner cover also has at least one wire outlet hole for at least one wire of the motor assembly of the hub motor to pass through.

[0010] A cable outlet assembly passes through the hub shaft and is located in the mounting groove of the inner cover. The cable outlet assembly has a motor connector and a wire connector.

[0011] The motor connector has a shaft hole corresponding to the hub shaft, and a backing plate on the side of the motor connector corresponding to the inner cover. The backing plate forms a mounting groove on the surface of the inner cover for assembling a load-end circuit board of a corresponding shape. The motor connector has a plurality of terminal guide holes extending through both ends on the periphery near the shaft hole. These terminal guide holes can be used for insertion of a plurality of opposite terminal bridge posts. The surface of the backing plate of the motor connector has a second positioning part corresponding to the first positioning part. The load-end circuit board is printed with a plurality of load contacts for connecting the wires of the motor assembly and a plurality of terminal contacts corresponding to the terminal guide holes. A conductor wire is formed between each load contact and each terminal contact. The end face of the motor connector has a guide rod and a limiting arc plate for accurate alignment of the aforementioned wire connector.

[0012] The wire connector has a shaft hole corresponding to the hub shaft, and an assembly groove on the side of the wire connector corresponding to the motor connector for mounting a terminal base. The wire connector also has a connector portion for connecting a wire bundle. The terminal base has a shaft hole corresponding to the hub shaft, and a plurality of terminal guide holes corresponding to the terminal guide holes on the motor connector, the guide rod, and the limiting arc plate, a guide hole, and a limiting arc groove. The terminal base has a first locking portion on the side of the wire connector for mounting a power supply circuit board. The power supply circuit board has a second locking portion corresponding to the first locking portion, and a plurality of terminal guide holes corresponding to the terminal guide holes on the terminal base for the aforementioned terminal bridging posts to pass through. The ends of the terminal bridging posts can be used for wire connection within the aforementioned wire bundle.

[0013] Therefore, the hub motor cable outlet structure of this utility model can be interconnected with the load end circuit board of the motor connector and the power supply end circuit board of the wire connector in the cable outlet group using the multiple terminal bridging posts to form a modular structure. This can effectively improve the firmness and alignment accuracy of the assembly, making it easier to assemble during installation. It can also effectively improve its waterproof and dustproof effect, effectively enhance its safety in use, and further extend its service life. At the same time, it can reduce the footprint of the entire cable group, further improving the convenience of assembly operation. It can also reduce the overall weight of the electric-assist bicycle, greatly improving its practicality and realizing its economic benefits.

[0014] Furthermore, this utility model utilizes the following technical means to further achieve the aforementioned objectives and effects; such as:

[0015] Preferably, the first positioning portion of the inner cover 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 mounting groove of the inner cover.

[0016] Preferably, the surface of the abutment piece of the motor connector is formed with a plurality of limiting notches communicating with the mounting groove, and the limiting notches respectively correspond to the cable outlet holes of the inner cover. The load end circuit board has limiting tabs 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.

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

[0018] Preferably, the motor connector extends to a bearing housing at one end, separate from the inner cover, for assembling a bearing to support the hub housing outside the hub motor.

[0019] Preferably, a waterproof ring gasket is sandwiched between the bearing housing and the wire connector of the motor 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 plate, a guide hole and a limiting arc groove.

[0020] Preferably, the bearing housing of the motor connector is provided with a dustproof ring between the bearing and the hub housing to achieve the purpose of waterproofing and dustproofing.

[0021] Preferably, the periphery of the terminal base is formed with at least one tooth, so that the terminal base can be injection molded into the wire connector.

[0022] Preferably, at least one first limiting portion is formed at each end of the hub axle, so that when the hub motor is assembled to the frame using the hub axle, it is fixed by a locking piece having a second limiting hole. Attached Figure Description

[0023] Figure 1 This is a three-dimensional external view of the hub motor cable outlet structure of this utility model.

[0024] Figure 2 This is a three-dimensional view of the hub motor cable outlet structure of this utility model from another perspective.

[0025] Figure 3 This is a three-dimensional exploded view of the hub motor cable outlet structure of this utility model, used to illustrate the appearance of its main components and their relative relationships.

[0026] Figure 4 This is a three-dimensional exploded view of the hub motor cable outlet structure of this utility model from another perspective.

[0027] Figure 5 This is a schematic diagram of the external structure of the hub motor cable outlet structure of this utility model applied to an electric-assisted bicycle.

[0028] Figure 6 This is a cross-sectional schematic diagram of the hub motor cable outlet structure of this utility model applied to an electric-assisted bicycle, to illustrate its internal composition and relative relationships.

[0029] Symbol Explanation

[0030] 10: Qualifying Group

[0031] 20: Motor connector

[0032] 21: Shaft Hole

[0033] 22: Apply a backing plate

[0034] 220: Install recess

[0035] 221: Limiting gap

[0036] 222: Second Positioning Unit

[0037] 23: Terminal guide hole

[0038] 24: Terminal bridge post

[0039] 25: Load-side circuit board

[0040] 250: Control circuit board

[0041] 251: Load contact

[0042] 252:Terminal contact

[0043] 253: Conductor wire

[0044] 254: Limiting extension plate

[0045] 26: Bearing housing

[0046] 260: Bearing

[0047] 271: Guide rod

[0048] 272: Limiting arc plate

[0049] 28: Waterproof ring gasket

[0050] 281:Terminal guide hole

[0051] 282: Guide hole

[0052] 283: Limiting arc groove

[0053] 29: Dustproof ring

[0054] 30: Wire connector

[0055] 31: Shaft hole

[0056] 32: Assembly slot

[0057] 33: Connector

[0058] 35: Terminal base

[0059] 350: Shaft hole

[0060] 351: Terminal guide hole

[0061] 352: Guide hole

[0062] 353: Limiting arc groove

[0063] 355: Insertion teeth

[0064] 356: First stop portion

[0065] 36: Power supply circuit board

[0066] 360: Second stop portion

[0067] 361: Terminal guide hole

[0068] 40: Wire bundle

[0069] 50: Wheel hub shell

[0070] 60: Hub motor

[0071] 61: Inner cover

[0072] 62: Motor Set

[0073] 63: Mounting slot

[0074] 64: First Positioning Section

[0075] 65: Cable outlet

[0076] 66: Hub axle

[0077] 660: First Limitation Section

[0078] 67: Locking plate

[0079] 68: Second limiting hole

[0080] 80: Chassis Detailed Implementation

[0081] This utility model relates to a hub motor cable outlet structure. In the accompanying drawings illustrating specific embodiments and components of this utility model, all references to front and back, left and right, top and bottom, upper and lower parts, and horizontal and vertical directions are for descriptive convenience only and are not intended to limit the utility model or restrict its components to any position or spatial orientation. Dimensions specified in the drawings and specification may be varied according to the design and requirements of this utility model without departing from the scope of the patent application.

[0082] The hub motor cable outlet structure of this utility model is applied to drive an electric-assisted bicycle or electric vehicle, such as... Figure 1 , 2 As shown in Figure 5, it consists of a hub motor 60 and a cable assembly 10 mounted on the frame 80 of the electric-assisted bicycle or electric vehicle. The hub motor 60 has a hub shaft 66 at its center. The hub motor 60 has a cup-shaped inner cover 61, and a motor assembly 62 is located inside the inner cover 61 to generate force to drive a hub shell 50 (e.g., […]) to rotate relative to the hub shaft 66. Figure 5 , 6As shown in the figure, the inner cover 61 has a mounting groove 63 coaxial with the hub shaft 66 on the outer edge of the closed end side, and the mounting groove 63 has at least one first positioning part 64. The first positioning part 64 can be hole-shaped or column-shaped. The present invention takes two hole-shaped first positioning parts 64 as the main embodiment for the installation and positioning of the cable assembly 10. The inner cover 61 has at least one cable outlet hole 65 for at least one wire of the motor assembly 62 of the hub motor 60 to pass through. The wire can be a control signal wire and a power supply wire. At least one first limiting part 660 is formed at each end of the hub shaft 66, so that when the hub motor 60 is assembled with the hub shaft 66 on the frame 80, it is fixed by a locking piece 67 with a second limiting hole 68.

[0083] The cable outlet assembly 10 consists of a motor connector 20 and a wire connector 30. For detailed specifications of the cable outlet assembly 10, please refer to [link to documentation]. Figure 3 , 4As disclosed in section 5, the motor connector 20 has a shaft hole 21 corresponding to the hub shaft 66 on its axis. The motor connector 20 also has a tab 22 on the side corresponding to the inner cover 61, and the tab 22 forms a mounting groove 220 on the surface of the inner cover 61 for assembling a load-side circuit board 25 of a corresponding shape. Furthermore, the tab 22 forms a plurality of limiting notches 221 communicating with the mounting groove 220 on the surface of the inner cover 61, and these limiting notches 221 respectively correspond to the inner cover... The body 61 has a cable outlet hole 65, and the motor connector 20 has a plurality of terminal guide holes 23 extending through both ends on the periphery adjacent to the shaft hole 21. These terminal guide holes 23 can be respectively inserted into a plurality of opposing terminal bridge posts 24. The terminal guide holes 23 and the terminal bridge posts 24 can have different diameters depending on whether they transmit signals or power. The load end circuit board 25 has a limiting tab 254 corresponding to the limiting notch 221 of the mounting slot 220, so that the load end circuit board 25 can be accurately aligned and installed. The motor connector 20 is located within the mounting groove 220, and the surface of the abutment 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 columnar or hole-shaped relative to the first positioning portion 64. This utility model uses two columnar second positioning portions 222 as the main embodiment, so that the motor connector 20 can be accurately positioned within the mounting groove 63 of the inner cover 61. Furthermore, the inner cover 61 is provided with at least one control circuit board 2. 50, and the load-side circuit board 25 is printed with a plurality of load contacts 251 connecting the wires of the motor assembly 62 or the control circuit board 250 and a plurality of terminal contacts 252 corresponding to the terminal guide holes 23, and a conductor wire 253 is formed between each of the load contacts 251 and the terminal contacts 252. In addition, the motor connector 20 extends a bearing seat 26 at one end different from the inner cover 61 for assembling a bearing 260, so as to use the bearing 260 to support the hub housing 50 outside the hub motor 60 (e.g., Figure 6 As shown, the hub shell 50 can rotate freely relative to the motor connector 20. The bearing seat 26 end face of the motor connector 20 is respectively formed with a guide rod 271 and a limiting arc plate 272, which can accurately align the aforementioned wire connector 30. 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, a guide hole 282 and a limiting arc groove 283 corresponding to the terminal guide holes 23 on the motor connector 20, the guide rod 271 and the limiting arc plate 272. Furthermore, the bearing seat 26 of the motor connector 20 is sandwiched between the bearing 260 and the hub shell 50 with a dustproof ring sleeve 29 to achieve the purpose of waterproofing and dustproofing.

[0084] The wire connector 30 has a shaft hole 31 corresponding to the hub shaft 66 on its axial center, and an assembly groove 32 on the side of the wire connector 30 corresponding to the motor connector 20 for injection molding to cover a terminal base 35. The wire connector 30 has a connector portion 33 for connecting a wire bundle 40. The terminal base 35 has a shaft hole 350 corresponding to the hub shaft 66 on its axial center, and has a plurality of terminal guide holes 351, a guide hole 352, and a limiting arc groove 353 corresponding to the terminal guide holes 23, the guide rod 271, and the limiting arc plate 272 on the motor connector 20, so that the wire connector 30 can be accurately connected to the motor using the terminal base 35. The connector 20 has at least one tooth 355 formed around the periphery of the terminal base 35. Furthermore, the terminal base 35 has a first locking portion 356 on the 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, so that the power supply circuit board 36 can be accurately positioned. 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 bridging posts 24 to pass through. The ends of the terminal bridging posts 24 can be connected to the signal lines or power lines in the aforementioned wire bundle 40.

[0085] This allows for the creation of a modular and easily assembled hub motor cable outlet structure.

[0086] As for the actual operation of the hub motor cable outlet structure of this utility model, 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 into 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.

[0087] The load-side circuit board 25 is then mounted on the motor connector 20, and the bearing 260 and the dustproof ring gasket 29 are mounted on the bearing seat 26 of the motor connector 20. The terminal bridging posts 24 of the wire connector 30 pass through the waterproof ring gasket 28 and the motor connector 20, with the other end of each terminal bridging post 24 mating with the corresponding terminal contact 252 of the load-side circuit board 25. This allows the motor connector 20 to be mounted within the mounting groove 63 of the inner cover 61. The signal and power lines of the motor assembly 62 within the inner cover 61 are then connected via the control circuit board 250 to the load contact 251 of the load-side circuit board 25. Finally, as per the previous step... Figure 5 , 6As shown, the hub housing 50 is assembled outside the hub motor 60, and the two side forks of the frame 80 are assembled on the hub shaft 66 of the hub motor 60, so that the cable outlet assembly 10 can be modularly and accurately and quickly assembled on the hub motor 60.

[0088] Through the foregoing design and description, the hub motor cable outlet structure of this utility model can be interconnected via the load end circuit board 25 of the motor connector 20 and the power supply end circuit board 36 of the wire connector 30 in the cable outlet group 10 using the multiple terminal bridging posts 24, forming a modular structure. This can effectively improve the assembly firmness and alignment accuracy, making it easier to assemble during installation. Furthermore, it can effectively improve its waterproof and dustproof effect, effectively enhance its safety in use, and further extend its service life. At the same time, it can reduce the footprint of the entire cable group, further improving the convenience of assembly operations, and also reducing the overall weight of the electric-assist bicycle.

Claims

1. A hub motor cable outlet structure, characterized in that... It is used on the frame of an electric-assisted bicycle, and the hub motor cable outlet structure includes: A hub motor has a hub shaft at its center. The hub motor has a motor assembly mounted on the hub shaft using an inner cover assembly to generate force to drive a hub housing that rotates relative to the hub shaft. The inner cover has a mounting groove coaxial with the hub shaft on the outer edge of the closed end side, and the mounting groove has at least one first positioning part. The inner cover also has at least one wire outlet hole for at least one wire of the motor assembly of the hub motor to pass through. A cable outlet assembly passes through the hub shaft and is located in the mounting groove of the inner cover. The cable outlet assembly has a motor connector and a wire connector. The motor connector has a shaft hole corresponding to the hub shaft, and a backing plate on the side of the motor connector corresponding to the inner cover. The backing plate forms a mounting groove on the surface of the inner cover for assembling a load-end circuit board of a corresponding shape. The motor connector has a plurality of terminal guide holes extending through both ends on the periphery near the shaft hole. These terminal guide holes can be used for insertion of a plurality of opposite terminal bridge posts. The surface of the backing plate of the motor connector has a second positioning part corresponding to the first positioning part. The load-end circuit board is printed with a plurality of load contacts connecting the motor assembly wires and a plurality of terminal contacts corresponding to the terminal guide holes. A conductor wire is formed between each load contact and each terminal contact. The end face of the motor connector has a guide rod and a limiting arc plate for accurate alignment of the aforementioned wire connector. The wire connector has a shaft hole corresponding to the hub shaft, and an assembly groove on the side of the wire connector corresponding to the motor connector for mounting a terminal base. The wire connector also has a connector portion for connecting a wire bundle. The terminal base has a shaft hole corresponding to the hub shaft, and a plurality of terminal guide holes corresponding to the terminal guide holes on the motor connector, the guide rod, and the limiting arc plate, a guide hole, and a limiting arc groove. The terminal base has a first locking portion on the side of the wire connector for mounting a power supply circuit board. The power supply circuit board has a second locking portion corresponding to the first locking portion, and a plurality of terminal guide holes corresponding to the terminal guide holes on the terminal base for the aforementioned terminal bridging posts to pass through. The ends of the terminal bridging posts can be used for wire connection within the aforementioned wire bundle.

2. The hub motor cable outlet structure as described in claim 1, characterized in that... The first positioning portion of the inner cover 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 mounting groove of the inner cover.

3. The hub motor cable outlet structure as described in claim 1, characterized in that... The surface of the abutment of the motor connector has a plurality of limiting notches that communicate with the mounting groove, and the limiting notches are respectively aligned with the cable outlet holes of the inner cover. The load end circuit board has limiting tabs that are aligned with 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 cable outlet structure as described in claim 1, characterized in that... The inner cover is provided with at least one control circuit board, and the load end circuit board is printed with the load contact for connecting the control circuit board wires.

5. The hub motor cable outlet structure as described in claim 1, characterized in that... The motor connector extends from one end of the inner cover to a bearing housing for assembling a bearing to support the hub housing outside the hub motor.

6. The hub motor cable outlet structure as described in claim 5, characterized in that... A waterproof ring gasket is provided between the bearing housing and the wire connector of the motor connector, and the waterproof ring gasket has a plurality of terminal guide holes corresponding to the terminal guide holes of the motor connector, the guide rod and the limiting arc plate, a guide hole and a limiting arc groove.

7. The hub motor cable outlet structure as described in claim 5, characterized in that... The bearing housing of the motor connector is fitted with a dustproof ring between the bearing and the hub housing to achieve the purpose of waterproofing and dustproofing.

8. The hub motor cable outlet structure as described in claim 1, characterized in that... The terminal base has at least one tooth formed around its periphery, allowing the terminal base to be injection molded into the wire connector.

9. The hub motor cable outlet structure as described in claim 1, characterized in that... The hub axle has at least one first limiting part at each end, which is used to fix the hub motor to the frame by a locking piece with a second limiting hole when the hub motor is assembled with the hub axle.

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