CN200980001Y - Improved structure of motor of electric bicycle - Google Patents

Abstract

The utility model relates to an improved structure of an electric motor of an electric bicycle, which mainly comprises a fixed part and a rotating part, wherein the fixed part is fixed at the position of a pedal shaft of the bicycle and is internally provided with a coil group and a tubular shaft; the rotating part is pivoted on the fixed part and can rotate, and a permanent magnet and a tubular shaft which correspond to the coil group are arranged in the rotating part and can drive the chain wheel group to rotate. When combined according to the above structure; the pedal shaft is arranged in the pipe shaft of the fixed part and the rotating part which are adjacent and coaxially communicated, and the pedal shaft and the chain wheel set are connected by a one-way bearing, so that the bicycle has the advantages of simple structure, large rotating torque force, wear resistance and capability of achieving the effect of automatic exchange between an electric mode and a pedal mode.

Description

Improved structure of motor of electric bicycle

technical field

The utility model relates to an electric bicycle, in particular to its motor structure.

Background technique

The motor structure of existing electric bicycles is generally designed separately from the pedal shaft utilizing manpower, and is driven independently for the rear wheel set of the bicycle to achieve the purpose of making the bicycle advance. The disadvantage of the above-mentioned existing structure is: the electric mode and the pedal mode of the existing structure must provide a switching device for switching, so its structure is relatively complicated and it is inconvenient to use; secondly, the existing structure The motor is set separately from the pedal mechanism, so it cannot be used in conjunction with the multi-layer chain wheel group with variable speed in the electric mechanism part, but can only achieve the function of speed change in the pedal mechanism; moreover, the existing When the structure meets a slope and the electric drive torque is insufficient, it cannot be assisted by pedals to drive forward, which does not meet the practical effect.

In order to improve the lack of the above-mentioned existing structure, the applicant in this case proposed a brand-new improvement of the power structure of the electric bicycle and applied for a new type patent in Taiwan, China, which was approved and announced for the record. However, the structure of the aforementioned prior patent is mainly composed of a motor with a hollow tube as the axis, a group of power exchange devices composed of a planetary reducer and a clutch, and a pedal connecting rod and other mechanisms; and The disadvantage of the above-mentioned one application is that the outer shell of the motor is used to directly fix the position of the pedal shaft of the bicycle, so the diameter of the above-mentioned motor is limited and it cannot output a large torque, so it needs to rely on a planetary deceleration In order to increase the output torque of the motor, the whole mechanism becomes more complicated; in addition, the specifications of the bearings used in the motor are reduced, so that the bearing capacity and wear resistance of the motor are poor, and it is easy to be damaged. Therefore, there is still room for further research and improvement of the power structure of the electric bicycle disclosed in the aforementioned previous case.

The designer of the utility model of this case, in view of the lack of the electric motor structure of the above-mentioned existing electric bicycles, carefully studied, and accumulated personal experience in research and development and testing for many years in the above-mentioned business, and finally designed a brand-new motor for electric bicycles. Improved structure.

Contents of the invention

The main purpose of the utility model is to provide an improved structure of the motor of an electric bicycle, which has a simple structure, a large rotational torque, wear resistance, and a structure that can automatically switch between electric and pedal modes.

The second purpose of the present utility model is to provide an improved structure of the motor of the electric bicycle, which can utilize the electric driving mechanism and still retain the function of being a variable-speed bicycle.

Another object of the present invention is to provide an improved structure of the motor of the electric bicycle, which can cooperate with the implementation of a set of forward and reverse switchers, so that the electric bicycle has forward and backward functions.

In order to achieve the above-mentioned purpose, the improved structure of the electric motor of the electric bicycle of the present invention mainly includes a fixed part and a rotating part, and the coil group of the fixed part and the permanent magnet of the rotating part form an electromagnetic induction effect and Rotate, and drive a sprocket group to rotate, and then make the bicycle advance through the linkage of the chain; it is characterized in that: the fixed part includes a dish-shaped shell seat, a coil group and a tube shaft, and the described The coil group is fixed on the inner side of the dish-shaped housing, and a bearing is provided at the center of the coil group, and the tube shaft is fixed at the center of the dish-shaped housing and integrated into one body, and the tube shaft is used to It is fixed at the position of the pedal shaft of the bicycle; the rotating part includes a dish-shaped casing, a permanent magnet and a tube shaft, the permanent magnet is ringed on the inner surface of the dish-shaped casing, and the tube shaft is passed through It is integrated in the center of the dish-shaped shell, and the rotating part can rotate by inserting the tube shaft in the bearing at the center of the coil group of the fixed part at the inner end of the dish-shaped shell. The outer end of the body drives the sprocket group to rotate.

When used in combination according to the above structure, the pedal shaft is pierced in the tube shaft coaxially arranged on the fixed part and the rotating part, and a pedal crank is respectively fixed at both ends of the pedal shaft, and a pedal crank in it It is connected with the sprocket set by a one-way bearing, and the sprocket set can be driven in one direction.

Compared with the prior art, the utility model adopting the above-mentioned technical solution has the advantages that: as mentioned above, the diameter of the coil group of the motor can be increased to a large size, and can generate a relatively large output torque, and therefore can not pass through The deceleration mechanism can achieve effective output force, and has the effect of simplifying the structure, and the bearing fixed in the center of the coil group can be designed with a larger and heavier load due to the large diameter of the coil group, so it can have better performance. wear resistance and can withstand greater gravity, and improve its practicability and service life; in addition, the transmission mechanism of the motor and the pedal shaft of the utility model is coaxially installed together, and the pedal shaft and the sprocket There is a one-way bearing linkage between the groups, so when the speed of the motor-driven sprocket group is fast, it will be in an idling state relative to the pedal shaft. On the contrary, if the power is insufficient or there is no power due to climbing , that is, when the speed of the sprocket group driven by the motor is relatively slow, the pedal shaft can be stepped on manually and the sprocket shaft can be driven to rotate through the one-way bearing, so as to achieve automatic exchange between electric and pedal modes, and can drive the electric motor synergistically. The effect of cycling forward.

Description of drawings

Fig. 1 is the simple embodiment schematic diagram of the utility model;

Fig. 2 is the three-dimensional exploded view of an embodiment of the utility model;

Fig. 3 is the combined sectional view of Fig. 2;

Fig. 4 is the combined sectional view of another embodiment of the present utility model;

FIG. 5 is a front plan view of the forward and reverse switcher in FIG. 4 .

Description of reference signs: 1-motor; 2-bicycle; 10-fixed part; 20-rotating part; 30-sprocket; 40-chain; 50-pedal shaft; 60-one-way bearing; Device; 80-back cover; 11-dish-shaped housing seat; 12-coil group; 13-tube shaft; 14-bearing; 21-dish-shaped shell; 22-permanent magnet; 23-tube shaft; 51-pedal crank ; 71-driving gear; 72-wheel disc; 73-brake; 721-braking surface;

Detailed ways

In order to enable your examiner to have a better understanding and understanding of the structure, device and features of the present utility model, a preferred feasible embodiment is hereby given together with the drawings, and the details are as follows:

Please match the improved structure of the motor of the electric bicycle shown in Figures 1 to 3, the motor 1 mainly includes a fixed part 10 and a rotating part 20, and the coil group 12 of the fixed part 10 and the rotating part 20 The permanent magnet 22 forms electromagnetic induction and rotates, and to drive a sprocket wheel set 30 to rotate, and then through the linkage of the chain 40, the bicycle 2 is advanced; it is characterized in that:

The fixed portion 10 includes a dish-shaped housing base 11, a coil group 12 and a tube shaft 13, the coil group 12 is fixed on the inner side of the dish-shaped housing base 11, and on the inside of the coil group 12 A bearing 14 is arranged in the center, and the tube shaft 13 is fixed at the center of the dish-shaped housing base 11 and integrated into one body, and at least one end thereof extends out of the disc-shaped housing base 11, and is fixed on the bicycle by the tube shaft 13 2 pedal shaft 50 position;

The rotating part 20 includes a dish-shaped housing 21, a permanent magnet 22 and a tube shaft 23, the permanent magnet 22 is arranged around the inner surface of the dish-shaped housing 21, and the tube shaft 23 is passed through The center of the dish-shaped housing 21 is integrated, and the rotating part 20 can rotate by inserting the tube shaft 23 into the bearing 14 at the center of the coil group 12 of the fixed part 10 at the inner end of the dish-shaped housing 21. The tube shaft 23 is at the outer end of the dish-shaped housing 21 to drive the sprocket set 30 to rotate.

When used in combination according to the above-mentioned structures, the pedal shaft 50 (the diameter of the tube shafts 13 and 23 can be different sizes) is pierced in the tube shafts 13 and 23 coaxially arranged on the fixed part 10 and the rotating part 20, and in the described A pedal crank 51 is respectively fixed at both ends of the pedal shaft 50, and a one-way bearing 60 is connected between a pedal crank 51 and the sprocket set 30, so that the pedal shaft 50 is connected to the sprocket set 30. It can be used as a one-way drive.

As mentioned above, the diameter of the coil group 12 of the motor 1 can be increased to a large size, so that a larger output torque can be generated, and therefore an effective output force can be achieved without a reduction mechanism, and the structure is simplified, and The bearing 13 fixed at the center of the coil group 12 can be designed with a larger and heavier load due to the large diameter of the coil group 12, so it can have better wear resistance and can withstand greater gravity, and improve its performance. Practicality and service life.

In addition, the transmission mechanism of the motor 1 and the pedal shaft 50 of the present utility model is installed together in a coaxial manner to perform work on the same sprocket set 30, and the sprocket set 30 can be single-piece or multi-layered. As shown in the figure, it is a multi-layered wheel set 30, so the electric bicycle of the present utility model can have the function of automatic speed change; Therefore, when the motor 1 drives the sprocket set 30 at a faster speed, it becomes idling relative to the pedal shaft 50. On the contrary, if the power is insufficient or there is no power due to climbing, it is driven by the motor 1. When the rotating speed of the sprocket group 30 is relatively slow, the pedal shaft 50 can be stepped on by manpower to promote the rotation of the sprocket shaft 30 through the one-way bearing 60, so as to achieve the automatic exchange of the electric mode and the pedal mode, and can drive the electric bicycle synergistically. Progressive effect.

As shown in the embodiments of Fig. 2 and Fig. 3 again, in the present embodiment, in order to allow the rotating part 20 of the electric motor 1 to achieve the effect of dustproofing and waterproofing, the tube shaft 23 of the rotating part 20 can be provided with A bearing bushing and a back cover 80, and the rotating part 20 is wrapped between the dish-shaped housing seat 11 of the fixed part 10 and the back cover 80, so as to have better dustproof and waterproof effects, and can Improve the safety of use of the product described.

Please refer to Fig. 4 and Fig. 5, when the motor 1 of the present invention is implemented, it can also be provided with a forward and reverse switcher 70 on the drive chain at the end of the tube shaft 23 of the rotating part 20 extending outward. The wheel set 30 rotates to enable the electric bicycle to have the functions of forward rotation and backward rotation. The forward and reverse switcher 70 is composed of a drive gear 71, a wheel disc 72 and two brakes 73, the drive gear 71 is fixed on the tube shaft 23 of the rotating part; the wheel disc 72 is a dish shape and is pivotally arranged on the position corresponding to the driving gear 71 on the described tube shaft 23, and the braking surface 721 on the inner side of its periphery can be provided with serrations or other rough surfaces; 73 is fan-shaped and symmetrically pivoted on the short shaft 722 on both sides of the disc surface of the wheel disc 72, and the outer edge in the middle of the brake 73 has an outer tooth pattern 731 to mesh with the above-mentioned driving gear 71, and on its outer side A brake plate 732 is respectively provided at both ends of the rim; accordingly, when the tube shaft 23 of the rotating part rotates forward (clockwise), it can drive the two brakes 73 to deviate to the left and right through the driving gear 71, so that The braking plate 732 at one end is in contact with the braking surface 721 of the wheel disc 72 (as shown by the solid line in Figure 5), and then pushes the wheel disc 72 to rotate forward (clockwise); otherwise, it can The said wheel 72 achieves the switching function of reversal (the state of dotted line in the figure). Again, the above-mentioned wheel disc 72 is combined with the sprocket wheel set 30 during implementation, so as to drive the electric bicycle forward or backward, and shown in the embodiment of Fig. 4 is that the wheel disc 72 and the sprocket wheel set 30 combined into the same member.

Again like the above structure, wherein in order to further increase the output torque of the motor, it can also add a speed reduction mechanism (not shown in the figure) between the rotating part 20 and the forward and reverse switcher 70 .

To sum up, the improved structure of the electric motor of the electric bicycle of the present invention can indeed achieve high rotational torque, wear resistance, and the effect of automatic switching between electric and pedal modes, and it is a brand new organizational form.

The above description is only illustrative, rather than restrictive, of the present utility model. Those of ordinary skill in the art understand that many modifications, changes or equivalents can be made without departing from the spirit and scope defined in the claims. But all will fall within the limitable scope of the claims of the present utility model.

Claims (5)

1. An improved structure of a motor of an electric bicycle, the motor mainly includes a fixed part and a rotating part, and the coil group of the fixed part and the permanent magnet of the rotating part form electromagnetic induction and rotate; its feature in: The fixing part includes a dish-shaped housing, a coil group and a tube shaft, the coil group is fixed on the inner side of the dish-shaped housing, and a bearing is arranged at the center of the coil group. The tube shaft is fixed at the center of the dish-shaped shell seat to be integrated, and the tube shaft is fixed at the position of the pedal shaft of the bicycle; The rotating part includes a dish-shaped casing, a permanent magnet and a tube shaft. The permanent magnet is arranged around the inner surface of the dish-shaped casing, and the tube shaft is connected through the center of the dish-shaped casing. In one piece, the rotating part can rotate by inserting the tube shaft at the inner end of the dish-shaped housing into the bearing in the center of the coil group of the fixed part, and at the same time, the tube shaft is driven at the outer end of the dish-shaped housing. The sprocket rotates. 2. According to the improved structure of the motor of the electric bicycle according to claim 1, it is characterized in that: the fixed part and the rotating part in the described motor are coaxially provided with a pedal shaft in the tube shaft, and the pedal shaft is installed in the described pedal A pedal crank is respectively fixed at both ends of the shaft, and a one-way bearing is connected between a pedal crank and the chain wheel set. 3. The improved structure of the motor of the electric bicycle according to claim 1, characterized in that: a bearing bushing and a rear cover are used on the tube shaft of the said rotating part, and the said rotating part is covered with a fixed Between the dish-shaped shell seat and the back cover. 4. The improved structure of the motor of the electric bicycle according to claim 1, characterized in that: a forward and reverse switch is provided at one end of the tube shaft of the rotating part extending outward to drive the sprocket set to rotate, and the The forward and reverse switching device is composed of a driving gear, a disc and two brakes. The driving gear is fixed on the tube shaft of the rotating part; the disc is pivoted in a dish shape. The position corresponding to the driving gear on the tube shaft, and the inner surface of its periphery forms a braking surface; the two brakes are sector-shaped and symmetrically pivoted on the short shafts on both sides of the disc surface of the wheel disc. The outer edge in the middle of the brake has outer teeth to mesh with the above-mentioned driving gear, and a brake plate is respectively arranged at both ends of the outer edge. 5. The improved structure of the motor of the electric bicycle according to claim 4, characterized in that: the wheel disc of the forward and reverse switcher is integrated with the sprocket set.

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