Hub motor wiring structure

Abstract

To provide a wiring structure for a hub motor that is able to improve assembly strength and alignment accuracy and facilitate assembly in installation, by forming a wiring connection portion in a modularized structure.SOLUTION: The wiring structure is composed of a hub motor and a wiring unit. The wiring unit includes a motor connection portion and a wire connection portion. A load terminal wiring board of the motor connection portion and a power supply end wiring board of the wire connection portion are connected to each other by a plurality of bridge connection rods, thereby forming a modularized structure. In this way, the assembly strength and the alignment accuracy can be effectively improved, and the assembly during installation can be made easier, so that the safety in use can be improved more effectively, and the overall volume of the wiring unit can be reduced.SELECTED DRAWING: Figure 3

Description

Technical Field

[0001] The present invention relates to the technical field of hubs for electric bicycles, and particularly to a modular hub motor wiring structure that can more effectively enhance the safety in use by improving the assembly strength and alignment accuracy, as well as the waterproof and dustproof effects of the wiring structure.

Background Art

[0002] The use of electric assist bicycles that assist the driving force generated by human power with a hub motor is very common. However, the control signal lines and power lines for power supply in the hub motor must be connected from the control system and power system of the external frame to the electromechanical device inside the hub motor. In the conventional method, the wire units of the signal lines and power lines are drawn into the motor one by one through the hub shaft and connected in series to the power lines and signal lines of the related motor electrical equipment. Therefore, in the installation of the wire units, not only is it difficult to assemble, but the fixity is insufficient, the alignment accuracy is low, and furthermore, there is a problem that the waterproof and dustproof work cannot be effectively carried out. In addition, since the signal lines and power lines need to be connected one by one after the overall installation, considering the assembly space and convenience of the assembly work, the volume occupied by the entire wire unit naturally becomes large, and furthermore, there is a problem that the wiring is easily damaged and the service life is short, which also has a significant impact on the safety when driving an electric assist bicycle.

[0003] In other words, the structure and design of the wire unit of the conventional hub motor have not been completed yet, and problems such as difficult wiring work, large volume, and insufficient safety have occurred. Therefore, the object of the present invention is to solve the above problems.

Summary of the Invention

Problems to be Solved by the Invention

[0004] The present invention aims to provide a wiring structure for a hub motor that improves assembly strength and alignment accuracy, and makes installation easier, by forming the wiring connection section into a modular structure.

[0005] The present invention further aims to provide a wiring structure for a hub motor that effectively improves the waterproof and dustproof effects of the wiring structure, enhances safety during use more effectively, and extends the service life.

[0006] The present invention also aims to provide a wiring structure for a hub motor that can reduce the overall weight of an electric assist bicycle while simultaneously improving the convenience of assembly operations by reducing the volume occupied by the entire wire unit. [Means for solving the problem]

[0007] The wiring structure for a hub motor of the present invention is used in the frame of an electric assist bicycle, and the wiring structure for the hub motor consists of a hub motor and a wiring unit. The hub motor has a hub shaft, and an electric motor unit is mounted on the hub shaft of the hub motor via an inner cover body, thereby generating a force that drives a hub housing that rotates in accordance with the hub shaft. A mounting groove coaxial with the hub shaft is formed on the outer edge of one side of the sealed end of the inner cover body, and the mounting groove includes at least one first positioning portion. The inner cover body also includes at least one wiring hole for passing at least one wire in the electric motor unit of the hub motor. The wiring unit penetrates the hub shaft and is provided in the mounting groove of the inner cover body. The wiring unit includes a motor connection portion and a wire connection portion. The axis of the motor connection portion has an axis hole corresponding to the hub shaft. The motor connection portion has a contact piece on one side corresponding to the inner cover body, and a mounting fitting groove is formed on the surface of the contact piece corresponding to the inner cover body, to which a load terminal wiring board of the corresponding shape is assembled. Furthermore, a plurality of terminal guide holes are formed on the periphery of the motor connection portion adjacent to the shaft hole, with a plurality of corresponding bridge connecting rods inserted through each of the terminal guide holes. The surface of the contact piece in the motor connection portion is provided with a second positioning portion corresponding to the first positioning portion. The load terminal wiring board is printed with a plurality of load contacts connected to the wires of the electric motor unit and a plurality of terminal contacts corresponding to the plurality of terminal guide holes. Wires are formed between the plurality of load contacts and the plurality of terminal contacts. Guide rods and limit arc pieces are formed on the end face of the motor connection portion, thereby ensuring accurate alignment of the wire connection portion. The axis of the wire connection portion is provided with a shaft hole corresponding to the hub shaft, and one side of the wire connection portion corresponding to the motor connection portion is provided with an assembly groove, to which a terminal base is attached.Furthermore, the wire connection portion includes a connection portion for connecting a wire harness, and the axis of the terminal base has an axis hole corresponding to the hub axis, and the terminal base has a plurality of terminal guide holes and guide holes and limit arc grooves corresponding to the plurality of terminal guide holes of the motor connection portion, the guide rod and the limit arc piece. Furthermore, one side of the terminal base corresponding to the wire connection portion has a first fitting portion to which a power supply end wiring board is attached, and the power supply end wiring board has a second fitting portion corresponding to the first fitting portion, and the power supply end wiring board has a plurality of terminal guide holes corresponding to the plurality of terminal guide holes of the terminal base, so that the bridge connection rods are connected through, and the ends of the plurality of bridge connection rods are connected to the wires in the wire harness. [Brief explanation of the drawing]

[0008] [Figure 1] This is a perspective view of the present invention. [Figure 2] This is a perspective view of the present invention from a different angle. [Figure 3] This is a perspective exploded view of the present invention. [Figure 4] This is an exploded perspective view of the present invention from a different angle. [Figure 5] This is an external view diagram showing the configuration when the present invention is used in an electric assist bicycle. [Figure 6] This is a cross-sectional view of the present invention when used in an electric assist bicycle. [Modes for carrying out the invention]

[0009] The present invention is used for driving an electric assist bicycle or electric bicycle. As shown in Figures 1, 2, and 5, the present invention consists of a hub motor 60 and a wiring unit 10 provided on the frame 80 of the electric assist bicycle or electric bicycle. The hub motor 60 has a hub shaft 66 at its axis, and the hub motor 60 is equipped with a bowl-shaped inner cover body 61, and an electric motor unit 62 is provided inside the inner cover body 61, thereby generating a force that drives a hub housing 50 that rotates relative to the hub shaft 66 (as shown in Figures 5 and 6). A mounting groove 63 coaxial with the hub shaft 66 is formed on one outer edge of the sealed end of the inner cover body 61, and the mounting groove 63 is equipped with at least one first positioning portion 64, the first positioning portion 64 can be perforated or columnar. In the present invention, the wiring unit 10 is installed and positioned by mainly using two perforated first positioning portions 64. Furthermore, the inner cover body 61 is provided with at least one wiring hole 65, which is for passing at least one wire in the electric motor unit 62 of the hub motor 60. The wire may be a control signal line and a power line for power supply. At least one first limiting portion 660 is formed at each end of the hub shaft 66, so that when the hub motor 60 is assembled to the frame 80 using the hub shaft 66, it is fixed by fixing pieces 67 having second limiting holes 68.

[0010] The wiring unit 10 consists of a motor connection section 20 and a wire connection section 30. For details of the configuration of the wiring unit 10, please refer to Figures 3, 4, and 5. The axis of the motor connection section 20 is provided with an axis hole 21 corresponding to the hub shaft 66, and one side of the motor connection section 20 corresponding to the inner cover body 61 is provided with a contact piece 22, and a mounting fitting groove 220 is formed on the surface of the contact piece 22 corresponding to the inner cover body 61, so that a load terminal wiring board 25 of the corresponding shape can be attached. In addition, a plurality of limit cutouts 221 that lead to the mounting fitting groove 220 are formed on the surface of the contact piece 22 corresponding to the inner cover body 61, and the plurality of limit cutouts 221 correspond to the wiring holes 65 of the inner cover body 61, respectively. Furthermore, a plurality of terminal guide holes 23 are formed on the periphery of the motor connection portion 20 adjacent to the shaft hole 21, and a plurality of opposing bridge connecting rods 24 can be inserted through each of the plurality of terminal guide holes 23. The plurality of terminal guide holes 23 and the plurality of bridge connecting rods 24 can have different diameters depending on the signal or power to be transmitted. The load terminal wiring board 25 is provided with limit extension pieces 254 corresponding to the limit missing portion 221 of the mounting fitting groove 220, thereby enabling the load terminal wiring board 25 to be precisely positioned and mounted within the mounting fitting groove 220 of the motor connection portion 20. The surface of the contact piece 22 in the motor connection portion 20 is provided with a second positioning portion 222 corresponding to the first positioning portion 64 of the inner cover body 61, and the second positioning portion 222 can be columnar or perforated corresponding to the first positioning portion 64. In this invention, by primarily using two columnar second positioning portions 222, the motor connection portion 20 can be accurately positioned within the mounting groove 63 of the inner cover body 61. Furthermore, the inner cover body 61 is provided with at least one control wiring board 250, and the load terminal wiring board 25 has a plurality of load contacts 251 that are connected to the wires of the electric motor unit 62 or the control wiring board 250, and a plurality of terminal contacts 252 corresponding to the plurality of terminal guide holes 23 printed on it.Furthermore, wires 253 are formed between the plurality of load contacts 251 and the plurality of terminal contacts 252. Also, a bearing base 26 extends from the end of the motor connection portion 20 opposite to the inner cover body 61, and a bearing 260 is attached to it, so that the hub housing 50 outside the hub motor 60 is supported by the bearing 260 (shown in Figure 6). As a result, the hub housing 50 can rotate freely in relation to the motor connection portion 20. In addition, a guide rod 271 and a limit arc piece 272 are formed on the end face of the bearing base 26 in the motor connection portion 20, so that the position of the wire connection portion 30 can be accurately aligned. Furthermore, a waterproof gasket 28 is sandwiched between the bearing base 26 and the wire connection portion 30, and the waterproof gasket 28 is provided with a plurality of terminal guide holes 281 and guide holes 282 and limit arc grooves 283, respectively, corresponding to the plurality of terminal guide holes 23, the guide rod 271 and the limit arc piece 272 of the motor connection portion 20. In addition, a dustproof annular cover 29 is sandwiched between the bearing 260 in the bearing base 26 of the motor connection portion 20 and the hub housing 50, thereby achieving the objectives of waterproofing and dustproofing.

[0011] Furthermore, the axis of the wire connection portion 30 is provided with an axis hole 31 corresponding to the hub shaft 66, and one side of the wire connection portion 30 corresponding to the motor connection portion 20 is provided with an assembly groove 32, thereby covering the terminal base 35 by injection molding, and the wire connection portion 30 is provided with a connection portion 33 for connecting the wire harness 40. In addition, the axis of the terminal base 35 is provided with an axis hole 350 corresponding to the hub shaft 66, and the terminal base 35 is provided with a plurality of terminal guide holes 351 and guide holes 352 and limit arc grooves 353 corresponding to the plurality of terminal guide holes 23, the guide rod 271 and the limit arc piece 272 of the motor connection portion 20, so that the wire connection portion 30 is accurately connected to the motor connection portion 20 by the terminal base 35. Furthermore, at least one mating tooth 355 is formed on the periphery of the terminal base 35, and one side of the terminal base 35 corresponding to the wire connection portion 30 is provided with a first mating portion 356, thereby allowing the power supply end wiring board 36 to be installed. The power supply end wiring board 36 is provided with a second mating portion 360 corresponding to the first mating portion 356 of the terminal base 35, thereby ensuring accurate positioning of the power supply end wiring board 36. Furthermore, the power supply end wiring board 36 is provided with a plurality of terminal guide holes 361 corresponding to the plurality of terminal guide holes 351 of the terminal base 35, so that the bridge connecting rods 24 are connected through the board, and the ends of the plurality of bridge connecting rods 24 are connected to the signal lines or power lines in the wire harness 40.

[0012] In this way, the hub motor can be modularized and its wiring structure can be made easy to assemble.

[0013] Embodiments of the present invention are carried out in the following procedure, as shown in Figures 1 to 6. First, the power supply end wiring board 36 is assembled to the terminal base 35, and the plurality of bridge connecting rods 24 connected to the wire harness 40 are inserted one by one into the power supply end wiring board 36 and the terminal base 35. Next, the terminal base 35 is placed in the mold for the wire connection portion 30, and the wire connection portion 30, which includes the plurality of bridge connecting rods 24, is covered and formed by injection molding technology.

[0014] Furthermore, the load terminal wiring board 25 is assembled to the motor connection section 20, the bearing 260 and the dustproof annular cover 29 are placed on the bearing base 26 of the motor connection section 20, and the plurality of bridge connecting rods 24 of the wire connection section 30 are passed through the waterproof gasket 28 and the motor connection section 20, and the other ends of the plurality of bridge connecting rods 24 are connected to the terminal contacts 252 corresponding to the load terminal wiring board 25. In this way, the motor connection section 20 is assembled into the mounting groove 63 of the inner cover body 61, and the signal lines and power lines of the electric motor unit 62 inside the inner cover body 61 are connected via the control wiring board 250 to correspond to the load contacts 251 of the load terminal wiring board 25. Finally, as shown in Figures 5 and 6, the hub housing 50 is assembled to the outside of the hub motor 60, and at the same time, the forks on both sides of the frame 80 are assembled onto the hub shaft 66 of the hub motor 60. This makes the wiring unit 10 a modular, high-precision structure and allows for quick assembly to the hub motor 60.

[0015] As can be seen from the above design and description, in the present invention, the load terminal wiring board 25 of the motor connection portion 20 in the wiring unit 10 and the power supply terminal wiring board 36 of the wire connection portion 30 are connected to each other by the plurality of bridge connection rods 24, and a modular structure is formed, so that the assembly strength and the alignment accuracy can be effectively improved. As a result, the combination during installation can be made easier. Furthermore, since the waterproof effect and the dustproof effect of the wiring structure can be effectively improved, the safety in use can be enhanced more effectively. Moreover, the service life of the wiring structure can be extended, and at the same time, the volume of the entire wire unit can be reduced, so that the convenience in the combination operation can be further improved, and the weight of the entire electric assist bicycle can be reduced.

Explanation of Signs

[0016] 10 Wiring unit 20 Motor connection portion 21 Shaft hole 22 Contact piece 220 Mounting fitting groove 221 Limit missing portion 222 Second positioning portion 23 Terminal guide hole 24 Bridge connection rod 25 Load terminal wiring board 250 Control wiring board 251 Load contact 252 Terminal contact 253 Wire 254 Limit extension piece 26 Bearing pedestal 260 Bearing 271 Guide rod 272 Limit arc piece 28 Waterproof gasket 281 Terminal guide hole 282 Guide hole 283 Limit arc-shaped groove 29 Dustproof annular cover 30 Wire connection portion 31 Shaft hole 32 Assembly grooves 33 Connection part 35 Terminal base 350 shaft hole 351 Terminal guide holes 352 Guide holes 353 Limit arc groove 355 mortise teeth 356 First mating section 36 Power supply end wiring board 360 Second mating section 361 Terminal guide holes 40 Wire Harnesses 50 Hub housing 60 Hub Motor 61 Inner cover body 62 Electric Motor Unit 63 Mounting groove 64 First positioning unit 65 Wiring hole 66 Hub axle 660 First Restriction Section 67 Fixed piece 68 Second Restriction Hole 80 frames

Claims

1. This is a wiring structure for a hub motor used in the frame of an electric assist bicycle, and the wiring structure for the hub motor consists of a hub motor and a wiring unit. The hub motor's axis includes a hub shaft, and an electric motor unit is mounted on the hub shaft of the hub motor via an inner cover body, thereby generating a force that drives a hub housing that rotates in accordance with the hub shaft. A mounting groove coaxial with the hub shaft is formed on one outer edge of the sealed end of the inner cover body, and the mounting groove includes at least one first positioning portion. The inner cover body also includes at least one wiring hole for passing at least one wire in the electric motor unit of the hub motor. The wiring unit penetrates the hub shaft and is provided in the mounting groove of the inner cover body, and the wiring unit includes a motor connection part and a wire connection part. The motor connection portion has an axis hole corresponding to the hub shaft, and one side of the motor connection portion corresponding to the inner cover body has a contact piece, and a mounting fitting groove is formed on the surface of the contact piece corresponding to the inner cover body, into which a load terminal wiring board of the corresponding shape is assembled, and furthermore, a plurality of terminal guide holes are formed on the periphery of the motor connection portion adjacent to the axis hole, and a plurality of corresponding bridge connection rods are inserted through each of the plurality of terminal guide holes, and the surface of the contact piece of the motor connection portion has a second positioning portion corresponding to the first positioning portion, and the load terminal wiring board has a plurality of load contacts that are connected to the wires of the electric motor unit and a plurality of terminal contacts corresponding to the plurality of terminal guide holes printed on it, and a wire is formed between the plurality of load contacts and the plurality of terminal contacts, and furthermore, a guide rod and a limit arc piece are formed on the end face of the motor connection portion, so that the wire connection portion is accurately aligned. The wiring structure for a hub motor is characterized in that the axis of the wire connection portion has an axis hole corresponding to the hub shaft, and one side of the wire connection portion corresponding to the motor connection portion has an assembly groove so that a terminal base can be attached, and the wire connection portion has a connection portion for connecting a wire harness, and the axis of the terminal base has an axis hole corresponding to the hub shaft, and the terminal base has a plurality of terminal guide holes and guide holes and limit arc-shaped grooves corresponding to the plurality of terminal guide holes of the motor connection portion, and the guide rod and limit arc piece, and one side of the terminal base corresponding to the wire connection portion has a first fitting portion to which a power supply end wiring board can be attached, and the power supply end wiring board has a second fitting portion corresponding to the first fitting portion, and the power supply end wiring board has a plurality of terminal guide holes corresponding to the plurality of terminal guide holes of the terminal base, so that the bridge connection rods are connected through, and the ends of the plurality of bridge connection rods are connected to the wires in the wire harness.

2. The wiring structure for a hub motor according to claim 1, characterized in that the first positioning portion of the inner cover body is perforated, and the second positioning portion of the motor connection portion is columnar, corresponding to the first positioning portion, so that the motor connection portion is accurately positioned within the mounting groove of the inner cover body.

3. The wiring structure for a hub motor according to claim 1, characterized in that a plurality of limit cutouts leading to the mounting fitting groove are formed on the surface of the contact piece in the motor connection portion, the plurality of limit cutouts each correspond to the wiring holes in the inner cover body, and the load terminal wiring board is provided with limit extension pieces corresponding to the plurality of limit cutouts in the mounting fitting groove, so that the load terminal wiring board is mounted in an accurate position within the mounting fitting groove of the motor connection portion.

4. The wiring structure for a hub motor according to claim 1, characterized in that the inner cover body is provided with at least one control wiring board, and the load terminal wiring board has the load contacts connected to the control wiring board wires printed on it.

5. Wiring structure for a hub motor according to claim 1, characterized in that a bearing base to which a bearing is assembled is provided extending from the end of the motor connection portion opposite to the inner cover body, so that the hub housing outside the hub motor is supported by the bearing.

6. A waterproof gasket is sandwiched between the bearing base and the wire connection portion of the motor connection portion, and the waterproof gasket is characterized in that it comprises a plurality of terminal guide holes, guide holes and limit arc-shaped grooves, respectively, corresponding to the plurality of terminal guide holes, the guide rod and the limit arc piece of the motor connection portion, as described in claim 5.

7. The wiring structure for a hub motor according to claim 5, characterized in that a dustproof annular cover is sandwiched between the bearing in the bearing base of the motor connection portion and the hub housing, thereby achieving the objectives of waterproofing and dustproofing.

8. The wiring structure for a hub motor according to claim 1, characterized in that at least one mating tooth is formed on the periphery of the terminal base, and the terminal base is covered within the wire connection portion by injection molding.

9. The wiring structure for a hub motor according to claim 1, characterized in that 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 by the hub shaft, it is fixed by fixing pieces having second limiting holes.

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