TWM627875U - Thru-axle hub motor and electric-assisted bicycle - Google Patents

Abstract

The invention discloses a thru-axle hub motor, which comprises a motor body, the motor body is mounted on a thru-shaft structure, the thru-axle structure comprises a thru-shaft rod and a thru-shaft, and a stopper for preventing the thru-shaft from rotating is provided on the hub side of the thru-shaft The rotating piece, the anti-rotation piece is provided with a clamping hole, and the anti-rotation piece is fixed on the cylindrical shaft through the cooperation of the clamping hole and the clamping groove provided on the end of the hub side of the spool; The head is configured so that when the thru-axle hub motor is mounted on the front or rear wheel of the bicycle, it can cooperate with the fork end of the front or rear fork of the bicycle to prevent the thru-axle from rotating.

Description

Thru-axle hub motor and electric assist bicycle

The utility model relates to an electric power-assisted bicycle, in particular to a wheel hub motor of the electric power-assisted bicycle.

The powertrain of an electric-assist bicycle can be configured in a number of ways, one of which is to place the motors at the hubs of the front and rear wheels to assist the bicycle when needed. The advantage of this kind of electric assist bicycle is that its assisting force acts directly on the bicycle wheel, which has high efficiency and compact structure. However, when a bicycle with a hub motor is installed, when a tire blowout occurs during riding, special tools are generally required to disassemble the wheel from the body, which is inconvenient for maintenance.

In view of the above-mentioned defects of the prior art, the technical problem to be solved by the present invention is to provide an in-wheel motor device that is easy to assemble and disassemble for an electric power-assisted bicycle.

In order to achieve the above purpose, the present invention provides a thru-axle hub motor, which includes a motor body, the motor body is mounted on the thru-axle structure, the thru-axle structure includes a thru-shaft rod and a thru-axle, and the hub side of the thru-axle is provided with a motor to prevent the motor from being damaged. The anti-rotation piece for the rotation of the cylindrical shaft is provided with a locking hole, and the anti-rotation piece is fixed on the cylindrical shaft through the cooperation of the locking hole and the locking groove provided on the end of the hub side of the cylindrical shaft; the anti-rotation piece is provided with a stop The structure of the swivel head and the anti-rotation head is arranged so that when the thru-axle hub motor is installed on the front or rear wheel of the bicycle, it can cooperate with the fork end of the front fork or the rear fork of the bicycle to prevent the thru-axle from rotating.

Further, a drive device, a deceleration device and a transmission device are arranged in the end cover and the hub of the motor body. The drive device includes a motor rotor and a motor stator; the deceleration device includes a planetary pagoda wheel and a sun gear; and the transmission device includes a ring gear and a planetary clutch.

Further, the end cap end of the cylindrical shaft rod is provided with a thread, and the hub end is provided with a handle.

The present invention also provides an electric power-assisted bicycle, wherein the above-mentioned hub motor is arranged between the fork ends of the front fork, and both ends of the fork end are distributed and fastened between the thru-shaft rod and the thru-axle.

The present invention also provides an electric power-assisted bicycle, wherein the above-mentioned wheel hub motor is arranged between the front and rear fork ends thereof, and the two ends of the fork end are distributed and fastened between the thru-axle rod and the thru-axle.

After the new thru-axle hub motor is installed on the bicycle, the thru-axle structure cannot rotate with the wheel-hub motor, and the anti-rotation plate can effectively prevent the thru-axle from rotating.

When the wheel needs to be repaired according to the electric power assisted bicycle of the present invention, turn the handle, loosen the thru-axle rod from the tightening nut, pull the thru-axle rod from the thru-axle, and then the whole wheel can be disassembled from the body , or after further removing the limit sleeve, the cassette flywheel can be taken out from the cylindrical shaft, thereby facilitating maintenance or component replacement.

The concept, specific structure and technical effects of the present invention will be further described below with reference to the accompanying drawings, so as to fully understand the purpose, features and effects of the present invention.

The following describes several preferred embodiments of the present invention with reference to the accompanying drawings, so as to make its technical content clearer and easier to understand. The present invention can be embodied in many different forms of embodiments, and the protection scope of the present invention is not limited to the embodiments mentioned herein.

An electric power-assisted bicycle according to the present invention is shown in FIG. 1 , wherein a hub motor 1 is arranged at the rear wheel hub of the bicycle lane.

Another electric power-assisted bicycle according to the present invention is shown in FIG. 2 , wherein the hub motor 1 is arranged at the rear wheel hub of the bicycle lane.

FIG. 3 is a cross-sectional view of the in-wheel motor 1 according to the present invention after installation. A drive device, a deceleration device and a transmission device are arranged in the end cover 24 and the wheel hub 23 of the in-wheel motor 1 . In this embodiment, the driving device includes a motor rotor 3 and a motor stator 4 ; the deceleration device includes a planetary pagoda wheel 5 and a sun gear 6 ; the transmission device includes a ring gear 7 and a planetary clutch 8 . For those with ordinary knowledge in the art, it is obvious to replace the above-mentioned drive device, reduction device and transmission device with other technical means in the prior art, and the present invention does not intend to limit this, so various modifications are should be within the scope of protection of this new model. The hub motor 1 is rotatably disposed on a spool structure including a spool shaft 10 and a spool shaft 11 , wherein the spool shaft 10 with a handle 21 is disposed to pass through the spool shaft 11 . Both ends of the fork end 2 of the bicycle front fork or rear fork are distributed and fastened between the thru axle rod 10 and the thru axle 11 .

Referring to FIGS. 3-8 at the same time, an independent cassette flywheel 9 is provided on the cylindrical shaft 11 on one side of the in-wheel motor 1 . The so-called independent means that unlike the prior art in which the cassette is fixed on or inside the end cover of the in-wheel motor, the cassette 9 in the embodiment of the present invention is arranged outside the end cover 24 and is opposite to the end cover 24. The end cap 24 is self-contained so that it can be quickly removed without removing the end cap. In order to limit the axial escape of the cassette 9 , a limiting sleeve 13 is provided on the cylindrical shaft 11 and outside the cassette 9 . The limiting sleeve 13 is installed on the key groove 14 at the end of the cylindrical shaft 11 through the key 19 provided on the inner wall thereof. It can be seen that this end of the cylindrical shaft 11 is actually fastened to the fork end 2 through the limiting sleeve 13 . In order to further fix the cylindrical shaft 11 and prevent the cylindrical shaft 11 from rotating relative to the fork end 2 , a knurling pattern 20 is provided on the end surface of the limiting sleeve 13 in contact with the fork end 2 .

Referring to FIG. 3 and FIGS. 9-11 at the same time, on the other side of the in-wheel motor 1 , also to prevent the cylindrical shaft 11 from rotating relative to the fork end 2 , the cylindrical shaft 11 is provided with an anti-rotation piece 12 . The anti-rotation piece 12 is provided with a clamping hole 18 and a anti-rotation head 16 . The anti-rotation piece 12 is fixed on the cylindrical shaft 11 through the cooperation between the locking hole 18 and the locking groove 17 provided on the cylindrical shaft 11 . As shown in FIG. 12 , when the in-wheel motor 1 is installed on the bicycle, the anti-rotation head 16 of the anti-rotation plate 12 plays the role of preventing the rotation of the cylindrical shaft 11 by cooperating with the fork end 2 of the bicycle. In this embodiment, the anti-rotation head 16 is formed by bending a corner of the anti-rotation piece 12 .

When the electric power-assisted bicycle according to the present invention as shown in Figures 1 and 2 needs to repair the wheels, refer to Figure 3, turn the handle 21, loosen the thru-shaft rod 10 from the tightening nut 22, and turn the thru-shaft rod 10 from the After the spool 11 is pulled out, the entire wheel can be disassembled from the vehicle body, or the limiting sleeve 13 can be further removed, and the cassette flywheel 9 can be taken out from the spool 11, thereby facilitating maintenance or component replacement. .

The preferred embodiments of the present invention have been described in detail above. It should be understood that those skilled in the art can make many modifications and changes according to the novel concept without creative efforts. Therefore, any technical solutions that can be obtained by a person with ordinary knowledge in the technical field through logical analysis, reasoning or limited experiments based on the concept of the present invention and limited experiments shall be within the scope of protection determined by the scope of the patent application for the new model. Inside.

1: Wheel hub motor 2: Fork end 3: Motor rotor 4: Motor stator 5: Planetary Pagoda Wheel 6: sun wheel 7: Internal gear ring 8: Planetary clutch 9: Cassette flywheel 10: Thru shaft rod 11: Thru shaft 12: Anti-rotation piece 13: Limit sleeve 14: Keyway 16: stop head 17: Card slot 18: Card hole 19: key 20: Knurled pattern 21: Handle 22: Nut 23: Wheels 24: End cap

1 is a schematic diagram of an electric power-assisted bicycle in a preferred embodiment of the present invention; Fig. 2 is the schematic diagram of the electric power-assisted bicycle in another preferred embodiment of the present invention; 3 is a cross-sectional view of the in-wheel motor in a preferred embodiment of the present invention after installation; 4 is a perspective view of the end cover side of the in-wheel motor in a preferred embodiment of the present invention; 5 is a schematic view of the installation of the limiting sleeve in a preferred embodiment of the present invention; 6 is an exploded view of the end cover side of the in-wheel motor in a preferred embodiment of the present invention; 7-8 are the assembly diagrams of the limiting sleeve and the cylindrical shaft in a preferred embodiment of the present invention; Fig. 9 is the assembly drawing of the hub side of the in-wheel motor in a preferred embodiment of the present invention; 10-11 are the assembly diagrams of the anti-rotation plate and the cylindrical shaft in a preferred embodiment of the present invention; Figure 12 is a schematic diagram of the cooperation of the anti-rotation piece and the fork end in a preferred embodiment of the present invention.

1: Wheel hub motor

12: Anti-rotation piece

Claims (6)

A thru-axle hub motor is characterized in that it comprises a motor body, the motor body is mounted on a thru-axle structure, the thru-axle structure comprises a thru-shaft rod and a thru-shaft, and a stopper for preventing the thru-shaft from rotating is provided on the hub side of the thru-axle. The rotating piece, the anti-rotation piece is provided with a clamping hole, and the anti-rotation piece is fixed on the cylindrical shaft through the cooperation of the clamping hole and the clamping groove provided on the end of the hub side of the spool; The head is configured so that when the thru-axle hub motor is mounted on the front or rear wheel of the bicycle, it can cooperate with the fork end of the front or rear fork of the bicycle to prevent the thru-axle from rotating. The thru-axle hub motor according to claim 1, wherein a drive device, a reduction device and a transmission device are provided in the end cover and the hub of the motor body, and the drive device includes a motor rotor and a motor stator; the speed reduction device includes a planetary pagoda wheel, a sun gear ; The transmission includes the ring gear and the planetary clutch. The thru-axle hub motor according to claim 1, wherein the end cap end of the thru-axle rod is provided with a thread, and the hub end is provided with a handle. The thru-axle hub motor according to claim 1, wherein the anti-rotation head is formed by bending a corner of the anti-rotation piece. An electric power-assisted bicycle, characterized in that the thru-axle hub motor as described in any one of claims 1-4 is arranged between the fork ends of the front fork of the bicycle, and both ends of the fork end are distributed and fastened to the thru-axle between the rod and the thru-axle. An electric power-assisted bicycle, characterized in that the thru-axle hub motor as described in any one of claims 1-4 is arranged between the fork ends of the rear fork of the bicycle, and both ends of the fork end are distributed and fastened to the thru axle between the rod and the thru-axle.

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