CN214101120U

CN214101120U - Motor shaft end locking structure of electric bicycle

Info

Publication number: CN214101120U
Application number: CN202022621534.XU
Authority: CN
Inventors: 沈国栋
Original assignee: Acma Electric Drive System Suzhou Co ltd
Current assignee: Acma Electric Drive System Suzhou Co ltd
Priority date: 2020-11-13
Filing date: 2020-11-13
Publication date: 2021-08-31
Anticipated expiration: 2030-11-13

Abstract

The utility model provides an electric bicycle motor shaft end locking structure, it uses the axletree position at the electric bicycle wheel, including wheel hub, wheel hub internal assembly has stator, rotor, the wheel hub both sides are equipped with main shaft, vice side axle respectively, wheel hub internal assembly has the link, main shaft, vice side axle are kept away from wheel hub's one end axis position has processed the internal thread hole respectively, the internal thread hole is internal assembled with wide along the screw, when the screw is screwed up along the width, through the head inboard of wide along the screw will the fork locking of bicycle frame is fixed. The wide edge screw directly locks the left end and the right end of the fork part, so that the use of external screw caps is reduced, the assembly steps are reduced, the assembly efficiency is improved, and the left width and the right width of the motor are reduced.

Description

Motor shaft end locking structure of electric bicycle

Technical Field

The utility model belongs to the technical field of the electric bicycle structure, concretely relates to electric bicycle motor shaft end locking structure.

Background

Electric bicycle is through installing motor structure additional on the bicycle for the bicycle can carry out the helping hand through the motor at the in-process of riding, and motor structure often installs additional in the rear wheel position of bicycle structure according to specific needs, is about to install motor structure additional in the wheel hub of rear wheel. The rear axle position at traditional electric bicycle need be connected with the fork portion of frame, then need die the fork portion lock of frame, in traditional dead lock structure, the rear axle tip design external screw thread structure of love bicycle usually needs, then need lock dead to frame fork portion through the nut, exposes outside in order to prevent that bicycle rear axle external screw thread position from simultaneously, still can further lock through the nut usually, has also increased the assembly degree of difficulty of bicycle like this. Simultaneously because electric bicycle rear axle needs to hold the motor structure, has increased the width of rear axle, in addition the traditional variable speed sprocket structure of bicycle for the rear axle length of bicycle is too big, has brought great inconvenience for riding of bicycle.

SUMMERY OF THE UTILITY MODEL

To above problem, the utility model provides a simple structure, installation convenient to use can shorten electric bicycle motor shaft end locking structure of electric bicycle rear axle structure greatly.

The utility model provides a technical scheme that its technical problem adopted is: the electric bicycle motor shaft end locking structure is used at the axle position of an electric bicycle wheel and comprises a hub, wherein a stator and a rotor are assembled in the hub, a main side shaft and an auxiliary side shaft are respectively assembled at two sides of the hub, a connecting frame is assembled in the hub, the parts of the main side shaft and the auxiliary side shaft of the hub, which penetrate into the hub, are fixedly connected through the connecting frame, and the hub is rotatably assembled relative to the main side shaft and the auxiliary side shaft; the fork part of the bicycle frame is locked and fixed through the inner side of the head part of the wide-edge screw when the wide-edge screw is screwed in the shaft end internal threads of the main shaft and the auxiliary shaft.

Preferably, the head of the wide-edge screw is provided with a hexagon socket head.

Preferably, the wide-edge screw is a cross screw or a straight screw.

Preferably, an elastic pad is assembled between the head of the wide-edge screw and the bicycle fork, and the ends of the main-side shaft and the secondary-side shaft extend out of the bicycle fork by 0.5mm-2 mm.

Preferably, the main shaft is provided with a circuit connecting hole for communicating with a stator circuit inside the hub, an inner opening of the circuit connecting hole is located at a central position inside the main shaft, and an outer opening of the circuit connecting hole is located between the bicycle fork and the hub.

Preferably, an external thread is formed at an outer end of the sub-side shaft, a tower sleeve fixedly connected with a hub is assembled at an outer side of the sub-side shaft, speed change wheels arranged in parallel on the bicycle are assembled on the tower sleeve, the tower sleeve and the sub-side shaft are connected coaxially in a relative rotation mode through an inner bearing and an outer bearing, a lock nut is assembled on the external thread of the sub-side shaft, the lock nut locks the outer bearing in the sub-side shaft and the tower sleeve, and a wide-edge screw at an outer side of the sub-side shaft locks a fork part of the bicycle frame on the lock nut.

Preferably, the lock nut is tightened against a bearing fitted on the secondary side shaft by a collar.

The beneficial effects of the utility model reside in that: this electric bicycle motor shaft end locking structure mainly uses in the bicycle, is used for carrying out the helping hand to the wheel of bicycle, and this motor during operation is through letting in alternating current to the inside stator of wheel hub for the rotor drives wheel hub rotatory, in this motor, through the vice sideshaft at both ends about and main sideshaft and the fork of main side axle and bicycle assemble mutually, in this motor main side axle and vice sideshaft outside axle head processing internal thread hole, then the wide screw of following carries out direct locking to the end about the fork, has reduced the use of outer nut like this, has reduced the assembly step, has improved assembly efficiency, makes the width reduction about this motor simultaneously, makes the electric bicycle rear axle difficult production when stepping down the leg when riding collide with or scrape.

Drawings

Fig. 1 is a schematic view of a cross section of a motor shaft end locking structure of an electric bicycle.

Detailed Description

The invention will be further illustrated with reference to the following examples:

as shown in fig. 1, in the present embodiment, an electric bicycle motor shaft end locking structure, which is used at the axle position of an electric bicycle wheel, comprises a hub 1, a stator and a rotor are assembled in the hub 1, a main side shaft 2 and a secondary side shaft 3 are respectively assembled at two sides of the hub 1, a connecting frame 4 is assembled in the hub 1, the main side shaft 2 and the secondary side shaft 3 of the hub 1 are fixedly connected with the hub 1 through the connecting frame 4, and the hub 1 is rotatably assembled relative to the main side shaft 2 and the secondary side shaft 3; the fork 5 of the bicycle frame, in this embodiment, the hub motor is used in the rear axle of the bicycle, so the fork 5 is referred to as the rear fork part of the electric bicycle. The two ends of the fork part 5 are respectively inserted into the end parts of the main shaft 2 and the secondary shaft 3, the axial line positions of one ends of the main shaft 2 and the secondary shaft 3, which are far away from the wheel hub 1, are respectively processed with internal threaded holes, the internal threaded holes of the main shaft 2 and the secondary shaft 3 are assembled with wide-edge screws 6, the head width of the wide-edge screws 6 is larger than the shaft end diameters of the main shaft 2 and the secondary shaft 3, and when the wide-edge screws 6 are screwed in the shaft end internal threads of the main shaft 2 and the secondary shaft 3, the fork part 5 is locked and fixed through the inner sides of the heads of the wide-edge screws 6.

This electric bicycle motor shaft end locking structure mainly uses in the bicycle, mainly is used for carrying out the helping hand to the rear wheel of bicycle in this embodiment, and this motor during operation, through letting in alternating current to the inside stator of wheel hub 1 for the rotor drives wheel hub 1 rotatory, in this motor, assembles with fork 5 of bicycle through vice sideshaft 3 and the main sideshaft 2 of controlling both ends, in this motor

main sideshaft

2 and 3 outside axle head processing internal screw holes of vice sideshaft, then the width is followed screw 6 and is carried out direct locking to the left and right sides end of fork 5, has reduced the use of outer nut like this, has reduced the assembly step, has improved assembly efficiency, makes the left and right sides width of this motor reduce simultaneously, makes the electric bicycle rear axle be difficult for producing when stepping down the leg when riding and colliding with or scraping.

In a specific use, the wide-edge screw 6 may be a socket head cap screw or a cross screw or a straight screw.

As shown in FIG. 1, the wide-edge screw 6 is fitted with an elastic pad 7 between its head and the bicycle fork, and the ends of the primary and

secondary shafts

2, 3 protrude 0.5-2 mm beyond the bicycle fork.

According to the characteristics of the hub motor, the internal circuit of the motor needs to be connected to the outside, in this embodiment, as shown in fig. 1, a circuit connecting hole 21 which is communicated with the stator circuit position inside the hub 1 is processed on the main shaft 2, and the inner opening of the circuit connecting hole 21 is positioned at the central position inside the main shaft 2, so that the external circuit can be conveniently accessed into the hub. The outer opening of the circuit connecting hole 21 is located between the bicycle fork 5 and the hub 1, thus facilitating the connection of external lines.

In the embodiment, since the hub motor is used at the rear wheel position, the outer end of the secondary shaft 3 is processed with an external thread, the outer side of the end of the secondary shaft 3 is provided with a tower sleeve 31 fixedly connected with the hub 1, the tower sleeve 31 is provided with a gearbox wheel arranged in parallel on the bicycle, the tower sleeve 31 and the secondary shaft 3 are connected coaxially in a relative rotation way through an inner bearing and an outer bearing, the external thread of the secondary shaft 3 is provided with a locking nut 32, the locking nut 32 locks the outer bearing between the secondary shaft 3 and the tower sleeve 31, and the outer side wide edge screw 6 of the secondary shaft 3 locks the fork part 5 of the bicycle frame on the locking nut 32. The outer side of the tower 31 is designed such that the lock nut 32 is pressed against a bearing mounted on the secondary shaft 3 by means of a collar 33.

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.

Claims

1. The utility model provides an electric bicycle motor shaft end locking structure, it uses the axletree position at the electric bicycle wheel, including wheel hub (1), wheel hub (1) internal assembly has stator, rotor, wheel hub (1) both sides are equipped with main side shaft (2), vice sideshaft (3) respectively, its characterized in that: the hub (1) is internally provided with a connecting frame (4), the parts of a main side shaft (2) and a secondary side shaft (3) of the hub (1) which penetrate into the hub (1) are fixedly connected through the connecting frame (4), and the hub (1) is rotatably assembled relative to the main side shaft (2) and the secondary side shaft (3); the two ends of a fork part (5) of a bicycle frame are respectively inserted into the end parts of a main shaft (2) and an auxiliary shaft (3), inner threaded holes are respectively machined in the positions, far away from a hub (1), of one end axes of the main shaft (2) and the auxiliary shaft (3), wide-edge screws (6) are assembled in the inner threaded holes of the main shaft (2) and the auxiliary shaft (3), the width of the heads of the wide-edge screws (6) is larger than the diameters of the shaft ends of the main shaft (2) and the auxiliary shaft (3), and when the wide-edge screws (6) are screwed in the inner threads of the shaft ends of the main shaft (2) and the auxiliary shaft (3), the fork part (5) is locked and fixed through the inner sides of the heads of the wide-edge screws (6).

2. The electric bicycle motor shaft end locking structure of claim 1, characterized in that: the wide-edge screw (6) is an inner hexagon screw or a screw shaped like a Chinese character 'mi'.

3. The electric bicycle motor shaft end locking structure of claim 1, characterized in that: the wide-edge screw (6) is a cross screw or a straight screw.

4. The electric bicycle motor shaft end locking structure of claim 1, characterized in that: an elastic pad (7) is assembled between the head of the wide-edge screw (6) and the bicycle fork, and the ends of the main side shaft (2) and the auxiliary side shaft (3) extend out of the bicycle fork by 0.5-2 mm.

5. The electric bicycle motor shaft end locking structure of claim 4, characterized in that: the main shaft (2) is provided with a circuit connecting hole (21) communicated with a stator circuit position in the hub (1), an inner opening of the circuit connecting hole (21) is positioned at the central position of the inner side of the main shaft (2), and an outer opening of the circuit connecting hole (21) is positioned between the bicycle fork part (5) and the hub (1).

6. The electric bicycle motor shaft end locking structure of claim 1, characterized in that: the outer end of the auxiliary side shaft (3) is processed with an external thread, a tower sleeve (31) fixedly connected with a hub (1) is assembled on the outer side of the end of the auxiliary side shaft (3), a speed change wheel which is parallel to the bicycle is assembled on the tower sleeve (31), the tower sleeve (31) and the auxiliary side shaft (3) are coaxially connected in a relative rotation mode through an inner bearing and an outer bearing, a locking nut (32) is assembled on the external thread of the auxiliary side shaft (3), the outer bearing is locked between the auxiliary side shaft (3) and the tower sleeve (31) through the locking nut (32), and a fork part (5) of the bicycle is locked on the locking nut (32) through a width edge screw (6) on the outer side of the auxiliary side shaft (3).

7. The electric bicycle motor shaft end locking structure of claim 6, characterized in that: the lock nut (32) is pressed against a bearing assembled on the secondary shaft (3) through a ring sleeve (33).