WO2019153165A1

WO2019153165A1 - Electric vehicle, and wheel assembly and hub motor thereof

Info

Publication number: WO2019153165A1
Application number: PCT/CN2018/075714
Authority: WO
Inventors: 李一鹏
Original assignee: 深圳乐行运动科技有限公司
Priority date: 2018-02-08
Filing date: 2018-02-08
Publication date: 2019-08-15
Also published as: CN209904518U

Abstract

The present invention relates to an electric vehicle, and a wheel assembly (10) and a hub motor (100) thereof. The wheel assembly (10) comprises the hub motor (100) and a first fixing support (200). The hub motor (100) comprises an output shaft (110) and a motor line (120). One end of the output shaft (110) is a first end portion (112). The first end portion (112) is clamped in the first fixing support (200). The first end portion (112) is provided with a first mounting surface (130). The first mounting surface (130) is used for bearing a load and transmitting a torque. The output shaft (110) is provided with a wiring channel (170) along an axial direction thereof. The wiring channel (170) has an outlet (172). The motor line (120) penetrates through the wiring channel (170), and one end of the motor line (120) passes through the outlet (172) and extends from the lateral periphery of the output shaft (110).

Description

Electric vehicle, wheel assembly and hub motor

Technical field

The present invention relates to the field of electric vehicle technology, and in particular to an electric vehicle, a wheel assembly and a hub motor thereof.

Background technique

The hub motor is the core component of the electric vehicle drive system. The rotation of the hub motor rotor can drive the electric vehicle to move. The output shaft of the hub motor can withstand the load and transmit the motor torque. The output shaft of a conventional hub motor is generally long, and threads are provided at both ends thereof, and the hub motor is mounted on the frame of the electric vehicle through the threads at both ends of the output shaft. The output shaft is generally a hollow shaft, and the wires of the hub motor are led out through the through holes of the output shaft, and are electrically connected to the power source of the electric vehicle. Special parts such as baffles are installed on both sides of the electric vehicle to shield and protect the output shaft and wires.

This kind of structure of the hub motor and its installation method take up too much space in the axial direction of the output shaft, and the electric vehicle is very bloated, which is not suitable for some of the requirements that the tire skin has a wide grounding width or a high lateral dimension. Folding cars and other products.

Summary of the invention

Based on this, it is necessary to provide an electric vehicle, a wheel assembly, and a hub motor thereof having a small size in the axial direction of the output shaft in view of the above problems.

A hub motor comprising:

An output shaft, one end of the output shaft is a first end, the first end portion is provided with a first mounting surface, the first mounting surface is for carrying a load and transmitting torque, and the output shaft is along an axial direction thereof Opening a wiring passage, the wiring passage having an outlet; and

a motor wire, the motor wire is disposed in the wiring passage, and one end of the motor wire protrudes from a side circumferential surface of the output shaft through the outlet.

A wheel assembly comprising:

a hub motor as described above; and

The first fixing bracket has a first end portion sandwiched in the first fixing bracket.

An electric vehicle comprising:

A wheel assembly as described above.

The electric vehicle, the wheel assembly and the hub motor thereof, one end of the motor line protrudes out of the output shaft through the outlet, the motor line protrudes from the side peripheral surface of the output shaft, and the motor line does not occupy the axial direction of the output shaft when the motor line is extended. Space on. The electric vehicle has a small size in the axial direction of the output shaft, and the electric vehicle has a small volume and is convenient to use.

DRAWINGS

The above and other objects, features and advantages of the present invention will become more apparent from the <RTIgt; The same reference numerals are used throughout the drawings to refer to the same parts, and the drawings are not intended to be scaled to the actual size. The emphasis is on the subject matter of the invention.

1 is a schematic structural view of a wheel assembly in an embodiment;

Figure 2 is an exploded view of the wheel assembly of Figure 1;

Figure 3 is a half cross-sectional view of the wheel assembly of Figure 1;

4 is a schematic structural view of the hub motor of FIG. 1 after the motor wire is removed;

Figure 5 is a schematic structural view of another perspective of the hub motor of Figure 1;

6 is a schematic structural view of a hub motor in another embodiment;

7 is a schematic structural view of a wheel assembly in another embodiment;

Figure 8 is a schematic view showing the structure of a wheel assembly in still another embodiment.

Detailed ways

The above described objects, features and advantages of the present invention will become more apparent from the aspects of the appended claims. Numerous specific details are set forth in the description below in order to provide a thorough understanding of the invention. However, the present invention can be implemented in many other ways than those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the invention, and thus the invention is not limited by the specific embodiments disclosed below.

It should be noted that when an element is referred to as being "fixed" to another element, it can be directly on the other element or the element can be present. When an element is considered to be "connected" to another element, it can be directly connected to the other element or. The terms "vertical", "horizontal", "left", "right", and the like, as used herein, are for the purpose of illustration and are not intended to be the only embodiment.

All technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs, unless otherwise defined. The terminology used in the description of the present invention is for the purpose of describing particular embodiments and is not intended to limit the invention.

An electric vehicle in an embodiment includes a wheel assembly 10 as shown in FIG. The wheel assembly 10 includes an in-wheel motor 100 and a first fixed bracket 200. One end of the output shaft 110 of the hub motor 100 is interposed in the first fixing bracket 200, and the first fixing bracket 200 is mounted on an electric vehicle such as an electric scooter or a balance car.

Referring to FIGS. 2 and 3 , in particular, the hub motor 100 includes an output shaft 110 and a motor wire 120 . The hub motor 100 can be a single-ended output shaft 110 motor or a double-ended output shaft 110 motor. In one embodiment, the hub motor 100 is a dual output shaft 110 motor. The output shaft 110 includes a first end portion 112 and a second end portion 114 that are oppositely disposed. The first end portion 112 is provided with a first mounting surface 130 for carrying loads and transmitting torque.

Referring to FIG. 4 , in one embodiment, the first end portion 112 defines a first mounting slot 140 , and the first mounting slot 140 includes a first bottom wall 142 and a first sidewall 144 . The end surface of the first end portion 112 is a first end surface 116, and the first side wall 144 is parallel to the first end surface 116. The first bottom wall 142 connects the first side wall 144 and the first end surface 116. At this time, the first bottom wall 142 is the first mounting surface 130. It can be understood that in other embodiments, the first mounting surface 130 can also be obtained by other means.

In one embodiment, the width of the first mounting surface 130 in the radial direction of the output shaft 110 is equal to the diameter of the output shaft 110. At this time, the width of the first mounting surface 130 is the largest, the bearing capacity of the output shaft 110 can be increased, the stress received by the output shaft 110 can be reduced, and the output shaft 110 can be subjected to the greatest possible torque.

The second end portion 114 is provided with a second mounting surface 150 for carrying loads and transmitting torque. Referring to FIG. 5 , in an embodiment, the second end portion 114 defines a second mounting slot 160 , and the second mounting slot 160 includes a second bottom wall 162 and a second sidewall 164 . The end surface of the second end portion 114 is the second end surface 118, the second side wall 164 is parallel to the second end surface 118, and the second bottom wall 162 is connected to the second side wall 164 and the second end surface 118. At this time, the second bottom wall 162 is the second mounting surface 150. It can be understood that in other embodiments, the second mounting surface 150 can also be obtained by other means.

In one embodiment, the width of the second mounting surface 150 in the radial direction of the output shaft 110 is equal to the diameter of the output shaft 110. At this time, the width of the second mounting surface 150 is the largest, the bearing capacity of the output shaft 110 can be increased, the stress on the output shaft 110 can be reduced, and the output shaft 110 can be subjected to the greatest possible torque.

Referring to FIGS. 2 to 4, the output shaft 110 is provided with a wiring passage 170 along its axial direction, and the wiring passage 170 has an outlet 172. The motor wire 120 is bored in the wiring passage 170, and one end of the motor wire 120 protrudes from the side peripheral surface of the output shaft 110 through the outlet 172. Specifically, the wiring channel 170 extends through the first sidewall 144 and the outlet 172 is located on the first sidewall 144. One end of the motor wire 120 is bored in the wiring passage 170, and the motor wire 120 is bent out through the outlet 172 to the outside of the wiring passage 170, and then bent, and then protrudes from the side peripheral surface of the output shaft 110. It can be understood that in other embodiments, the wiring channel 170 can also be other structures, and only the motor wire 120 needs to be protruded from the side peripheral surface of the output shaft 110.

Referring to FIG. 6 , in another embodiment, the output shaft 110 is further provided with a cavity 180 extending in the axial direction of the output shaft 110 , and the cavity 180 is in communication with the wiring passage 170 . The output shaft 110 defines a cavity 180. The output shaft 110 can have more space for routing, and can also reduce the weight of the output shaft 110.

Referring to FIGS. 2 and 3 again, the first fixing bracket 200 is used to mount the hub motor 100, and the first end portion 112 of the output shaft 110 is sandwiched in the first fixing bracket 200. In one embodiment, the first mounting bracket 200 includes a first mounting plate 210 and a first mounting block 220. The first mounting block 220 is disposed on the first mounting plate 210, and the first end portion 112 is disposed on the first mounting block 220. Between the first mounting plate 210 and the first mounting plate 210.

Specifically, the first mounting block 220 is disposed on the first mounting board 210 through the first fixing member 230. In one embodiment, the first mounting block 220 defines a first mounting hole 222, and the first mounting plate 210 defines a first threaded hole (not shown) corresponding to the first mounting hole 222. The first fixing member 230 is a threaded fastener. The first fixing member 230 passes through the first mounting hole 222 and is screwed into the first threaded hole, so that the first mounting block 220 is disposed on the first mounting plate 210. The number of the first mounting holes 222 is two, and the two first mounting holes 222 are spaced apart along the extending direction of the first mounting block 220. The first connecting plate 400 is provided with two first threaded holes, and the two first threaded holes respectively correspond to the two first mounting holes 222. The number of the first fixing members 230 is two, and each of the first fixing members 230 is screwed into the corresponding one of the first threaded holes through the corresponding first mounting holes 222.

The first mounting block 220 is provided with a first fixing slot 224 . The first end portion 112 is received in the first fixing slot 224 , and the first mounting surface 130 abuts the first mounting plate 210 . The first mounting surface 130 can carry a load and can complete the transfer of torque. The shape of the first fixing groove 224 matches the shape of the first end portion 112 to ensure the stability of the installation of the output shaft 110. In one embodiment, the first fixing groove 224 is disposed between the two first mounting holes 222 . The first mounting block 220 is bent to form a first fixing groove 224. It can be understood that in other embodiments, the first fixing groove 224 can also be formed by other means. For example, the first mounting block 220 is cut away to obtain the first fixing groove 224.

Referring to FIG. 7 and FIG. 8 , it can be understood that, in other embodiments, the first fixing slot 224 can also be opened on the first mounting plate 210 , and the first end portion 112 is received in the first fixing slot 224 . The first mounting surface 130 abuts the first mounting block 220. The first fixing slot 224 is formed on the first mounting plate 210, so that the structure of the first mounting block 220 is simple, and the first mounting block 220 is convenient to manufacture. The shape of the cross section of the first end portion 112 can be specifically set as needed. For example, the shape of the cross section of the first end portion 112 may be a hexagon, a square, a trapezoid, a semicircle, or a triangle.

The length of the first mounting surface 130 along the axial direction of the output shaft 110 is 0.8 to 1.2 times the thickness of the first mounting plate 210, so that the first end portion 112 is sandwiched in the first fixing bracket 200, the first end portion 112 The first mounting plate 210 is not protruded too much, and the first mounting plate 210 does not exceed the first end portion 112 too much. In one embodiment, the length of the first mounting surface 130 along the axial direction of the output shaft 110 is equal to the thickness of the first mounting plate 210. After the first end portion 112 is sandwiched in the first fixing bracket 200, the first end surface 116 and the first end surface 116 A mounting plate 210 is flush to reduce the size of the electric vehicle in the axial direction of the output shaft 110.

In one embodiment, the first fixing bracket 200 is provided with a wire receiving slot 212. One end of the motor wire 120 passes through the outlet 172 and is received in the wire receiving slot 212. Specifically, the wire receiving slot 212 is opened on the first mounting plate 210, and the wire receiving slot 212 extends along the extending method of the first mounting plate 210. It can be understood that in other embodiments, the wire receiving slot 212 can also be opened on the first mounting block 220, or the first mounting block 220 and the first mounting plate 210 can be enclosed by the wire receiving slot 212.

In one embodiment, since the hub motor 100 is a double-ended output shaft 110 motor, the second end portion 114 of the hub motor 100 also needs to be fixed. The wheel assembly 10 further includes a second fixing bracket 300, and the second end of the output shaft 110 The 114 is sandwiched in the second fixing bracket 300. Specifically, the second mounting bracket 300 includes a second mounting plate 310 and a second mounting block 320. The second mounting block 320 is disposed on the second mounting plate 310, and the second end portion 114 is disposed on the second mounting block 320 and the second mounting portion 320. Two between the mounting plates 310.

Specifically, the second mounting block 320 is disposed on the second mounting board 310 through the second fixing member 330. In one embodiment, the second mounting block 320 is provided with a second mounting hole 322, and the second mounting plate 310 is provided with a second threaded hole (not shown) corresponding to the second mounting hole 322. The second fixing member 330 is a threaded fastener. The second fixing member 330 passes through the second mounting hole 322 and is screwed into the second threaded hole, so that the second mounting block 320 is disposed on the second mounting plate 310. The number of the second mounting holes 322 is two, and the two second mounting holes 322 are spaced apart along the extending direction of the second mounting block 320. The second connecting plate 400 is provided with two second threaded holes, and the two second threaded holes respectively correspond to the two second mounting holes 322. The number of the second fixing members 330 is two, and each of the second fixing members 330 is screwed into the corresponding one of the second threaded holes through the corresponding second mounting holes 322.

The second mounting block 320 is provided with a second fixing groove 324. The second end portion 114 is received in the second fixing groove 324, and the second mounting surface 150 abuts the second mounting plate 310. The second mounting surface 150 can carry the load and can complete the transmission of torque. The shape of the second fixing groove 324 matches the shape of the second end portion 114 to ensure the stability of the installation of the output shaft 110. In an embodiment, the second fixing groove 324 is disposed between the two second mounting holes 322. The second mounting block 320 is bent to form a second fixing groove 324. It can be understood that in other embodiments, the second fixing groove 324 can also be formed by other means. For example, the second mounting block 320 is cut away to obtain a second fixing groove 324.

It can be understood that in other embodiments, the second fixing groove 324 can also be opened on the second mounting plate 310, the second end portion 114 is received in the second fixing groove 324, and the second mounting surface 150 and the second mounting surface are installed. Block 320 abuts. The second fixing groove 324 is formed on the second mounting plate 310, so that the structure of the second mounting block 320 is simple, and the second mounting block 320 is convenient to manufacture. The shape of the cross section of the second end portion 114 can be specifically set as needed. For example, the shape of the cross section of the second end portion 114 may be a hexagon, a square, a trapezoid, a semicircle, or a triangle.

The length of the second mounting surface 150 along the axial direction of the output shaft 110 is 0.8 to 1.2 times the thickness of the second mounting plate 310, so that the second end portion 114 is sandwiched in the second fixing bracket 300, and the second end portion 114 is The second mounting plate 310 is not protruded too much, and the second mounting plate 310 does not protrude too much beyond the second end portion 214. In one embodiment, the length of the second mounting surface 150 along the axial direction of the output shaft 110 is equal to the thickness of the second mounting plate 310. After the second end portion 114 is disposed in the second fixing bracket 300, the second end surface 118 and the second end surface The two mounting plates 310 are flush and reduce the size of the electric vehicle in the axial direction of the output shaft 110.

Referring to FIG. 2 and FIG. 3 , in one embodiment, the wheel assembly 10 further includes a connecting plate 400 . The two ends of the connecting plate 400 are respectively connected to the first mounting plate 210 and the second mounting plate 310 , and the hub motor 100 is received in the first A mounting plate 210 is interposed between the second mounting plate 310. The connecting plate 400 is used to connect the first fixing bracket 200 and the second fixing bracket 300 as a whole, so that the wheel assembly 10 is mounted on the electric vehicle. In one embodiment, the second mounting plate is provided with a receiving groove 312 extending along the extending direction of the second mounting plate 310. The second mounting plate 310 has the same structure as the first mounting plate 210, and the hub motor 100 does not need to select a mounting direction when installed, so that the hub motor 100 can be quickly installed.

Referring to FIGS. 7 and 8, in other embodiments, the wheel assembly 10 further includes a connecting rod 500 disposed on the connecting plate 400, and the connecting rod 500 and the hub motor 100 are located on opposite sides of the connecting plate 400. The wheel assembly 10 can be mounted to an electric vehicle such as an electric scooter or a balance car by the connecting rod 500.

In the above electric vehicle, the wheel assembly 10 and the hub motor 100 thereof, the first mounting block 220 and the first mounting plate 210 clamp the first end portion 112 up and down, and the second mounting block 320 and the second mounting plate 310 clamp the second end up and down. The portion 114, the first fixing bracket 200 and the second fixing bracket 300 do not occupy the space in the axial direction of the output shaft 110 when the hub motor 100 is mounted. One end of the motor wire 120 protrudes from the side peripheral surface of the output shaft 110 through the outlet 172, and the motor wire 120 does not occupy the space in the axial direction of the output shaft 110 when it protrudes. One end of the motor wire 120 passes through the outlet 172 and is received in the take-up groove 212. The baffle is not used to block and protect the motor wire 120, and no part such as a baffle occupies the space in the axial direction of the output shaft 110. Therefore, the electric vehicle has a small size in the axial direction of the output shaft 110, and the electric vehicle has a small volume and is convenient to use. Moreover, since the first fixing bracket 200 and the second fixing bracket 300 are assembled in the up and down direction, the hub motor 100 is easy to assemble and disassemble.

The technical features of the above-described embodiments may be arbitrarily combined. For the sake of brevity of description, all possible combinations of the technical features in the above embodiments are not described. However, as long as there is no contradiction between the combinations of these technical features, All should be considered as the scope of this manual.

The above-described embodiments are merely illustrative of several embodiments of the present invention, and the description thereof is more specific and detailed, but is not to be construed as limiting the scope of the invention. It should be noted that a number of variations and modifications may be made by those skilled in the art without departing from the spirit and scope of the invention. Therefore, the scope of the invention should be determined by the appended claims.

Claims

A hub motor, comprising:

An output shaft having one end at a first end, the first end being provided with a first mounting surface for carrying a load and transmitting torque, the output shaft being axially Opening a wiring passage, the wiring passage having an outlet; and

a motor wire, the motor wire is disposed in the wiring passage, and one end of the motor wire protrudes from a side circumferential surface of the output shaft through the outlet.
The hub motor according to claim 1, wherein the first end portion is provided with a first mounting groove, and the first mounting groove comprises a first bottom wall and a first side wall, the first end portion The first end surface is parallel to the first end surface, the first bottom wall is connected to the first side wall and the first end surface, and the first bottom wall is the first end surface Mounting surface.
The hub motor of claim 2 wherein said wiring passage extends through said first side wall and said outlet is located on said first side wall.
The hub motor according to claim 1, wherein a width of said first mounting surface in a radial direction of said output shaft is equal to a diameter of said output shaft.
The hub motor according to claim 1, wherein said output shaft is provided with a cavity, said cavity extending in an axial direction of said output shaft, said cavity being in communication with said wiring passage.
A wheel assembly, comprising:

The hub motor according to any one of claims 1 to 5;

The first fixing bracket has a first end portion sandwiched in the first fixing bracket.
The wheel assembly according to claim 6, wherein the first fixing bracket is provided with a wire receiving groove, and one end of the motor wire passes through the outlet and is received in the wire receiving groove.
The wheel assembly according to claim 7, wherein the first fixing bracket comprises a first mounting plate and a first mounting block, and the first mounting block is disposed on the first mounting plate, the first One end portion is sandwiched between the first mounting block and the first mounting plate.
The wheel assembly according to claim 8, wherein the first mounting block is provided with a first fixing groove, and the first end portion is received in the first fixing groove, and the first mounting surface is The first mounting plate abuts.
The wheel assembly according to claim 9, wherein the length of the first mounting surface in the axial direction of the output shaft is 0.8 to 1.2 times the thickness of the first mounting plate.
The wheel assembly according to claim 8, wherein the first mounting plate is provided with a first fixing groove, and the first end portion is received in the first fixing groove, and the first mounting surface is The first mounting block abuts.
The wheel assembly according to claim 6, further comprising a second fixing bracket, wherein the other end of the output shaft is a second end, and the second end is sandwiched in the second fixing bracket .
The wheel assembly according to claim 12, wherein the second fixing bracket comprises a second mounting plate and a second mounting block, and the second mounting block is disposed on the second mounting plate, the The two ends are sandwiched between the second mounting block and the second mounting plate.
The wheel assembly according to claim 13, wherein the second end portion is provided with a second mounting surface, the second mounting block is provided with a second fixing groove, and the second end portion is received in the In the second fixing groove, the second mounting surface abuts the second mounting plate.
The wheel assembly according to claim 14, wherein the length of the second mounting surface in the axial direction of the output shaft is 0.8 to 1.2 times the thickness of the second mounting plate.
The wheel assembly according to claim 12, further comprising a connecting plate, wherein two ends of the connecting plate are respectively connected to the first fixing bracket and the second fixing bracket.
An electric vehicle characterized by comprising:

A wheel assembly according to any one of claims 6 to 16.