Wiring structure for hub motor

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 electric bicycle hubs, and more particularly to a modularized wiring structure for a hub motor that can improve assembly strength and alignment accuracy, as well as waterproof and dustproof effects of the wiring structure, thereby more effectively enhancing safety in use. [Background technology]

[0002] Electrically assisted bicycles, which use a hub motor to supplement human-powered driving force, are very popular. However, the control signal lines and power lines for supplying power to the hub motor must be connected from the control system and power system of the external frame to the electric machinery inside the hub motor. Conventional methods involve pulling signal and power line assemblies one by one through the hub axle into the motor and connecting them in series with the power and signal lines of the associated motor's electrical equipment. This makes assembly of the assemblies difficult, results in insufficient fixation, poor alignment accuracy, and ineffective waterproofing and dustproofing. Furthermore, because the signal and power lines must be connected one by one after the entire assembly is installed, the overall volume of the assemblies is inevitably large, taking into account the space and convenience of assembly. Furthermore, the wiring is easily damaged and has a short service life, which significantly impacts the safety of riding an electric-assisted bicycle.

[0003] In other words, the structure and design of the wire unit of conventional hub motors have not yet been perfected, resulting in problems such as difficulty in wiring work, large volume, and insufficient safety.The purpose of the present invention is to find a way to solve the above problems. Summary of the Invention [Problem 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 by forming the wiring connection part into a modular structure, making it easier to assemble during installation.

[0005] Another object of the present invention is to provide a wiring structure for a hub motor that can effectively improve the waterproof and dustproof effects of the wiring structure, more effectively increase safety in use, and further extend the service life.

[0006] Another object of the present invention is to provide a wiring structure for a hub motor that reduces the volume occupied by the entire wire unit, thereby improving the convenience of assembly operations and reducing the overall weight of the electric assist bicycle. [Means for solving the problem]

[0007] The wiring structure for a hub motor of the present invention is used in the frame of an electrically assisted bicycle, and the wiring structure for a hub motor comprises a hub motor and a wiring unit. The hub motor has an axis center including a hub axle, and an electric motor unit is mounted on the hub axle of the hub motor via an inner cover body. The electric motor unit generates a force that drives a hub housing that rotates in correspondence with the hub axle. An attachment groove coaxial with the hub axle is formed in the outer edge of one side of the sealed end of the inner cover body, and the attachment groove has at least one first positioning portion. The inner cover body also has at least one wiring hole for passing at least one wire of the electric motor unit of the hub motor. The wiring unit penetrates the hub axle and is installed in the attachment groove of the inner cover body. The wiring unit has a motor connection portion and a wire connection portion. The axis of the motor connection portion has an axial hole corresponding to the hub axle. The motor connection portion has a contact piece on one side corresponding to the inner cover body, and the surface of the contact piece corresponding to the inner cover body has an attachment fitting groove for fitting a correspondingly shaped load terminal wiring board. The motor connection portion further includes a peripheral edge adjacent to the axial hole, which defines a plurality of terminal guide holes extending from both ends thereof, through which a corresponding plurality of bridge connection rods are inserted. The surface of the abutting piece of the motor connection portion includes second positioning portions corresponding to the first positioning portions. 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 terminal guide holes. Wires are formed between the load contacts and the terminal contacts, and guide rods and limiting arc pieces are formed on the end face of the motor connection portion, thereby accurately aligning the wire connection portion. The axial center of the wire connection portion defines a axial hole corresponding to the hub axle, and one side of the wire connection portion corresponding to the motor connection portion defines an assembly groove for mounting a terminal base.The wire connection portion includes a connection portion for connecting a wire harness, the terminal seat has an axial hole corresponding to the hub axle, and the terminal seat has a plurality of terminal guide holes, guide holes, and arc-shaped limiting grooves corresponding to the terminal guide holes, guide rods, and arc-shaped limiting pieces of the motor connection portion. The terminal seat has a first fitting portion on one side corresponding to the wire connection portion, to which a power supply end wiring board is attached, 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 terminal guide holes of the terminal seat, so that the bridging connection rods are through-connected and the ends of the bridging connection rods are connected to the wires in the wire harness. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 1 is a perspective view of the present invention. [Figure 2] FIG. 10 is a perspective view of the present invention seen from another angle. [Figure 3] FIG. 1 is a perspective exploded view of the present invention. [Figure 4] FIG. 2 is a perspective exploded view of the present invention from another angle. [Figure 5] 1 is an external configuration diagram of a case in which the present invention is used in an electrically assisted bicycle. [Figure 6] FIG. 1 is a cross-sectional view showing the present invention when used in an electric-assisted bicycle. DETAILED DESCRIPTION OF THE INVENTION

[0009] The present invention is used to drive an electrically assisted bicycle or an electric bicycle. As shown in FIGS. 1, 2, and 5, the present invention comprises a hub motor 60 mounted on a frame 80 of the electrically assisted bicycle or the electric bicycle, and a wiring unit 10. The hub motor 60 has a hub axle 66 at its axis. The hub motor 60 includes a bowl-shaped inner cover 61, and an electric motor unit 62 is mounted within the inner cover 61. The electric motor unit 62 generates a force to drive a hub housing 50 that rotates about the hub axle 66 (see FIGS. 5 and 6). A mounting groove 63 is formed on the outer edge of one side of the closed end of the inner cover 61, coaxial with the hub axle 66. The mounting groove 63 includes at least one first positioning portion 64, which may be hole-shaped or column-shaped. In the present invention, two hole-shaped first positioning portions 64 are mainly used to install and position the wiring unit 10. The inner cover body 61 also has at least one wiring hole 65 through which at least one wire in the electric motor unit 62 of the hub motor 60 passes. The wire may be a control signal line and a power line for power supply. At least one first limiting portion 660 is formed on each end of the hub axle 66, and when the hub motor 60 is assembled to the frame 80 using the hub axle 66, the hub axle 66 is fixed by a fixing piece 67 having a second limiting hole 68.

[0010] The wiring unit 10 comprises a motor connection portion 20 and a wire connection portion 30. For details of the configuration of the wiring unit 10, see FIGS. 3, 4, and 5. The axis of the motor connection portion 20 has an axle hole 21 corresponding to the hub axle 66, and one side of the motor connection portion 20 corresponding to the inner cover body 61 has a contact piece 22. A mounting groove 220 is formed on the surface of the contact piece 22 corresponding to the inner cover body 61, allowing a correspondingly shaped load terminal wiring board 25 to be attached. In addition, a plurality of limit cutouts 221 communicating with the mounting 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. The motor connection part 20 has a peripheral edge adjacent to the shaft hole 21, which is formed with a plurality of terminal guide holes 23 penetrating both ends, through which a plurality of corresponding bridge connecting rods 24 can be inserted. The terminal guide holes 23 and the bridge connecting rods 24 can have different diameters depending on the signal or power to be transmitted. The load terminal wiring board 25 has limit extension pieces 254 corresponding to the limit cutouts 221 of the mounting grooves 220, respectively, so that the load terminal wiring board 25 can be accurately positioned and mounted in the mounting grooves 220 of the motor connection part 20. The surface of the abutting piece 22 of the motor connection part 20 has 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 hole-shaped corresponding to the first positioning portion 64. The present invention mainly employs two pillar-shaped second positioning portions 222, allowing the motor connection portion 20 to be accurately positioned within the mounting groove 63 of the inner cover body 61. The inner cover body 61 is also provided with at least one control wiring board 250, and the load terminal wiring board 25 is printed with a plurality of load contacts 251 to be connected to the electric motor unit 62 or wires of the control wiring board 250, and a plurality of terminal contacts 252 corresponding to the plurality of terminal guide holes 23.Furthermore, wires 253 are formed between the plurality of load contacts 251 and the plurality of terminal contacts 252, respectively. A bearing stand 26 is provided extending from the end of the motor connection part 20 opposite the inner cover body 61, and a bearing 260 is attached thereto, so that the hub housing 50 outside the hub motor 60 is supported by the bearing 260 (shown in FIG. 6). This allows the hub housing 50 to rotate freely relative to the motor connection part 20. Furthermore, a guide rod 271 and a limit arc piece 272 are formed on the end surface of the bearing stand 26 in the motor connection part 20, respectively, so that the position of the wire connection part 30 can be accurately adjusted. Furthermore, a waterproof gasket 28 is sandwiched between the bearing base 26 and the wire connection part 30, and the waterproof gasket 28 has a plurality of terminal guide holes 281, guide holes 282, and limit arc grooves 283 corresponding to the plurality of terminal guide holes 23, the guide rods 271, and the limit arc pieces 272 of the motor connection part 20. Furthermore, a dustproof annular cover 29 is sandwiched between the bearing 260 in the bearing base 26 of the motor connection part 20 and the hub housing 50, thereby achieving the purpose of waterproofing and dustproofing.

[0011] The axial center of the wire connection part 30 has an axial hole 31 corresponding to the hub axle 66, and one side of the wire connection part 30 corresponding to the motor connection part 20 has an assembly groove 32, which is injection molded to cover a terminal seat 35, and the wire connection part 30 has a connection part 33 for connecting a wire harness 40. The axial center of the terminal seat 35 has an axial hole 350 corresponding to the hub axle 66, and the terminal seat 35 has a plurality of terminal guide holes 351, guide holes 352, and limit arc grooves 353 which correspond to the plurality of terminal guide holes 23, the guide rods 271, and the limit arc pieces 272 of the motor connection part 20, so that the wire connection part 30 is accurately connected to the motor connection part 20 by the terminal seat 35. At least one mating tooth 355 is formed on the periphery of the terminal seat 35, and one side of the terminal seat 35 corresponding to the wire connection portion 30 is provided with a first mating portion 356, 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 seat 35, allowing the power supply end wiring board 36 to be accurately positioned. 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 seat 35, allowing the above-mentioned bridging connecting rods 24 to be penetrated and the ends of the plurality of bridging connecting rods 24 to be connected to the signal lines or power lines in the above-mentioned wire harness 40.

[0012] In this way, a wiring structure for a hub motor can be configured that is modularized and easy to assemble.

[0013] 1 to 6, an embodiment of the present invention is carried out in the following procedure. First, the power supply end wiring board 36 is assembled to the terminal seat 35, and the plurality of bridge connection rods 24 connected to the wire harness 40 are inserted one by one into the power supply end wiring board 36 and the terminal seat 35. Next, the terminal seat 35 is placed in a mold for the wire connection part 30, and the wire connection part 30 including the plurality of bridge connection rods 24 is coated and formed by injection molding.

[0014] Furthermore, the load terminal wiring board 25 is assembled to the motor connection part 20, the bearing 260 and the dustproof annular cover 29 are provided on the bearing stand 26 of the motor connection part 20, and the plurality of bridge connecting rods 24 of the wire connection part 30 are passed through the waterproof gasket 28 and the motor connection part 20 in a manner corresponding to the motor connection part 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 part 20 is assembled in the mounting groove 63 of the inner cover body 61, and the signal line and the power line of the electric motor unit 62 in the inner cover body 61 are connected via the control wiring board 250 in a manner corresponding to the load contacts 251 of the load terminal wiring board 25. 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 axle 66 of the hub motor 60. This allows the wiring unit 10 to have a modular, highly accurate structure and to be quickly assembled to the hub motor 60.

[0015] As can be seen from the above design and description, the present invention interconnects the load terminal wiring board 25 of the motor connection part 20 of the wiring unit 10 and the power supply end wiring board 36 of the wire connection part 30 with the plurality of bridge connecting rods 24, forming a modular structure, which effectively improves assembly strength and alignment accuracy. This makes assembly easier and effectively improves the waterproof and dustproof effects of the wiring structure, thereby more effectively enhancing safety in use. Furthermore, it extends the service life of the wiring structure and reduces the overall volume of the wiring unit, thereby further improving the convenience of assembly operation and reducing the overall weight of the electric assist bicycle. [Explanation of symbols]

[0016] 10 Wiring unit 20 Motor connection 21 Shaft hole 22 Contact piece 220 Mounting groove 221 Limit Missing Part 222 Second positioning part 23 Terminal guide hole 24 Bridge connecting rod 25 Load terminal wiring board 250 Control wiring board 251 Load Contact 252 terminal contacts 253 Wire 254 Limit extension piece 26 Bearing stand 260 bearings 271 Guide rod 272 Limit Arc Piece 28 Waterproof gasket 281 Terminal guide hole 282 Guide hole 283 Limit Arc Groove 29 Dustproof annular cover 30 Wire connection part 31 Shaft hole 32 Assembly groove 33 Connection 35 Terminal base 350 shaft hole 351 Terminal guide hole 352 Guide hole 353 Limit arc groove 355 Interlocking teeth 356 First fitting part 36 Power supply end wiring board 360 Second fitting part 361 Terminal guide hole 40 Wire harness 50 Hub housing 60 hub motor 61 Inner cover body 62 Electric motor unit 63 Mounting groove 64 First positioning part 65 Wiring hole 66 Hub axle 660 First Restriction 67 Fixed piece 68 Second Restriction Hole 80 frames

Claims

1. A wiring structure for a hub motor used in a frame of an electrically assisted bicycle, the wiring structure for the hub motor comprising a hub motor and a wiring unit, The axis of the hub motor comprises a hub axle, and an electric motor unit is mounted on the hub axle of the hub motor via an inner cover body, whereby the electric motor unit generates a force to drive a hub housing that rotates in correspondence with the hub axle, and an attachment groove is formed on the outer edge of one side of the sealed end of the inner cover body, the attachment groove being coaxial with the hub axle, and the inner cover body has at least one first positioning portion, and at least one wiring hole for passing at least one wire of the electric motor unit of the hub motor, the wiring unit passes through the hub axle and is provided in the mounting groove of the inner cover body, the wiring unit including a motor connection portion and a wire connection portion; The motor connection part has an axis having an axial hole corresponding to the hub axle, and one side of the motor connection part corresponding to the inner cover body is equipped with a contact piece, and a mounting groove is formed on the surface of the contact piece corresponding to the inner cover body, into which a load terminal wiring board of a corresponding shape is attached. Furthermore, the motor connection part has a peripheral edge adjacent to the axial hole, and a plurality of terminal guide holes penetrating both ends are formed, and a plurality of corresponding bridge connecting rods are inserted into the plurality of terminal guide holes, and the surface of the contact piece of the motor connection part has a second positioning portion corresponding to the first positioning portion, and 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 are printed on the load terminal wiring board, and wires are formed between the plurality of load contacts and the plurality of terminal contacts. Furthermore, guide rods and limit arc pieces are formed on the end surface of the motor connection part, so that the above-mentioned wire connection part is accurately aligned. the axial center of the wire connection portion has an axial hole corresponding to the hub axle, and one side of the wire connection portion corresponding to the motor connection portion has an assembly groove for attaching a terminal seat, and the wire connection portion has a connection portion for connecting a wire harness, the axial center of the terminal seat has an axial hole corresponding to the hub axle, and the terminal seat has a plurality of terminal guide holes, guide holes and limit arc grooves corresponding to the plurality of terminal guide holes, the guide rods and the limit arc piece of the motor connection portion, and the one side of the terminal seat corresponding to the wire connection portion has a first fitting portion to which a power supply end wiring board is attached, the power supply end wiring board has a second fitting portion corresponding to the first fitting portion and has a plurality of terminal guide holes corresponding to the plurality of terminal guide holes of the terminal seat, so that the above-mentioned bridge connecting rods are through-connected and the ends of the plurality of bridge connecting rods are connected to wires in the above-mentioned wire harness.

2. The wiring structure of a hub motor described in claim 1, characterized in that the first positioning portion of the inner cover body is hole-shaped, and the second positioning portion of the motor connection portion is column-shaped 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 of a hub motor described in claim 1, characterized in that a surface of the abutment piece of the motor connection portion is formed with a plurality of limit defects that lead to the mounting fitting groove, and the plurality of limit defects each correspond to the wiring holes of the inner cover body, and the load terminal wiring board is each provided with limit extension pieces that correspond to the plurality of limit defects of the mounting fitting groove, so that the load terminal wiring board can be mounted in an accurately aligned position within the mounting fitting groove of the motor connection portion.

4. The wiring structure of a hub motor as described in claim 1, characterized in that at least one control wiring board is provided on the inner cover body, and the load terminal wiring board has the load contacts printed thereon to be connected to the control wiring board wires.

5. The wiring structure of a hub motor as described in claim 1, characterized in that a bearing stand to which a bearing is attached is extended at the end of the motor connection portion opposite the inner cover body, so that the hub housing outside the hub motor is supported by the bearing.

6. The wiring structure of a hub motor as described in claim 5, characterized in that a waterproof gasket is sandwiched between the bearing base of the motor connection part and the wire connection part, and the waterproof gasket has a plurality of terminal guide holes, guide holes and limit arc grooves corresponding to the plurality of terminal guide holes, guide rods and limit arc pieces of the motor connection part, respectively.

7. The wiring structure of a hub motor as described in claim 5, characterized in that a dustproof annular cover is sandwiched between the bearing in the bearing base of the motor connection part and the hub housing, thereby achieving waterproof and dustproof purposes.

8. The wiring structure of a hub motor as described in 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 of a hub motor as described in claim 1, characterized in that at least one first limiting portion is formed on each end of the hub axle, and when the hub motor is assembled to the frame using the hub axle, it is fixed by fixing pieces each having a second limiting hole.

Images