TWI418489B - Motorized bicycle and driving mechanism thereof - Google Patents

Description

Electric bicycle and its driving mechanism

The present invention relates to a bicycle and a drive mechanism thereof, and more particularly to an electric bicycle and a drive mechanism thereof.

In order to improve the use of the bicycle and reduce the physical burden of the bicycle rider, in recent years, electric bicycles have been introduced with electric motors instead of human beings and have been widely favored by consumers.

At present, the motor drive design of a typical electric bicycle can be divided into the following four categories: The first type: the motor system is set outside the front or rear wheel, and the motor shaft is parallel to the wheel axis after being driven.

The second type: the motor is assembled on a bracket outside the rear or front wheel, and the motor shaft is perpendicular to the driven wheel axle.

The third category: the motor is directly combined with the front or rear wheels, and directly becomes the mandrel of the wheel. It is characterized by the main system of the motor rotating with the front or rear wheels.

The fourth type: the motor is perpendicular to the pedal drive shaft and drives the front sprocket via the transmission element.

So far, the driving mechanisms of most electric bicycles on the market are mostly the first, second and third types of designs mentioned above, and the fourth category is a small number. The above-mentioned first type of transmission mode is shown in the new patent No. 522964 of FIG. 1. The motor A1 of the conventional electric bicycle is set outside the rear wheel, so that the motor shaft is arranged in parallel with the wheel shaft after being driven, and The sprocket A3 fixed to the rear wheel is driven by the transmission element A2.

The second type of transmission is shown in Fig. 2. The motor B1 of the conventional electric bicycle is assembled on the rear frame B2 and the rear axle is disposed on the frame B2, and the motor shaft is vertically disposed after being driven, and is driven by the transmission. The component drives the sprocket B3 fixed to the rear wheel.

The third type of transmission is shown in the new patent No. M259755 of Figure 3 and the new patent No. 467091 of Figure 4. Referring to Figure 3, the motor C1 of the conventional electric bicycle is directly combined with the front wheel C2 to make the shaft of the motor. The heart is the axis of the wheel, and the front wheel is driven by the connection of the motor and the transmission element. Referring to FIG. 4, the motor D1 of the conventional electric bicycle is directly coupled with the rear wheel D2, and the motor D1 is coupled with the transmission element. The rear wheel D2 is driven to rotate.

For the fourth type of transmission, please refer to the new patent No. 192351 of FIG. 5 and the announcement No. 519087 of FIG. 6. As shown in FIG. 5, the motor E1 of the conventional electric bicycle is transmitted through the steering transmission component E4 and the chain E5. The front sprocket E2 is coupled, and the motor E1 is disposed perpendicularly to the pedal drive shaft E3. The main sprocket E5 is driven by the chain E5 by using the steering transmission element E4 parallel to the front sprocket E2 to drive the rear wheel to rotate. As shown in FIG. 6, the motor F1 of the conventional electric bicycle is coupled with the front sprocket F2, and the motor F1 and the pedal transmission shaft F3 are vertically disposed, and are driven by a set of transmission devices F5 (as shown in FIG. 7). The front sprocket F2 is driven to rotate the front sprocket F2 with the chain F4.

However, the aforementioned four types of systems have the following disadvantages:

1. The transmission modes of the first, second and third types of systems are designed to drive the motor (such as A1, B1, C1, D1) directly to the front or rear wheels without using the transmission function. As a whole, in addition to the power and strength of the gearbox, the climbing force is also small.

2, the first type of transmission, as shown in Figure 1, because the motor A1 is parallel to the rear wheel, and the radius of the rear wheel is not small, so a longer chain A4 (or belt) is required, the relative cost will be High and easy to fall off.

3. The second type of transmission mode, as shown in Fig. 2, the motor B1 must be attached with a pair of bevel gears as transmission elements to change the transmission direction so as to be parallel to the wheel axis. Since the gear set is a precision mechanical component, in addition to the cost of construction, it is also necessary to consider the problem of proper lubrication. Furthermore, the motor B1 of this type of transmission must be mounted on the side of the rear frame B2. Overall, the electric bicycle The weight will be seriously unbalanced. If the motor is installed on the rear wheel, it will not be able to add a pedal that can be used by the carrier because it occupies a considerable space.

4, the third type of transmission, as shown in Figure 3, its motor C1 is wrapped inside the mandrel of the front wheel C2, and the main system of the motor C1 will rotate with the front wheel C2; as shown in Figure 4, its motor D1 The mandrel is fixed to the rear wheel D2, and the main system of the motor D1 rotates with the rear wheel D2. The motors used in this type of transmission are not general specifications, but need to be customized, the manufacturing cost is high, and when the dynamic balance is not done, the car will jump up and down when traveling; in addition, this type of Wheels are also not standard, and they need to be manufactured separately, which also causes high manufacturing costs.

5, the fourth type of transmission is a very small number, as shown in Figure 5, when the motor E1 is activated, it will also drive the pedal and the front sprocket E2, so when the electric mode is used, the knight must take the foot Raise it to avoid being hit by the pedals, and increase the load due to the rotation of the pedals, resulting in waste of electrical energy and reducing the power supply time of the battery; as shown in Figure 6, the whole The transmission device F5 is disposed on the same direction as the front sprocket F2 (as shown in FIG. 7), which on the one hand will cause imbalance of the left and right weight of the bicycle, and on the other hand, the transmission device F5 is not easily installed due to the limitation of the space. If it is barely installed, the strength should also be considered; further, the transmission device F5 used in the transmission mode shown in FIG. 6 is as shown in FIG. 7, and the transmission device F5 includes a one-way transmission component F51. The structural characteristics of the unidirectional transmission element F51 are as shown in FIG. 8. Since it is not a combination of standard specifications and the overall shape is extremely complicated, the manufacturing process is extremely difficult and costly.

6. The above four types of transmission design have the problem that the motor shaft must be driven at the same time when there is no electric power and must be driven by the pedal. However, due to the magnetic force between the rotor and the stator of the motor, it is more expensive than riding a general bicycle. Extra strength, and feels laborious.

In addition, as shown in the previous Taiwan application for a new patent (M301184), it discloses a driving mechanism for an electric bicycle, as shown in Fig. 5 (Fig. 16 of the present invention), the driving mechanism uses a clutch device (the number is 60) Transfer the output torque of the motor to the front sprocket. In addition, if the climbing section is replaced by a pedaling mode, the output torque of the pedal is transmitted to the sprocket by a one-way bearing (reference numeral 70). The clutch device is shown in Fig. 4 (Fig. 17 of the present invention). However, the drive mechanism has the following missing:

(a) The motor reduction mechanism, the clutch device and the one-way bearing are separately separated and lined up, so that the overall thickness is too large, so that the rider is uncomfortable when the rider is riding.

(b) As shown in Fig. 5 (Fig. 16 of the present invention), it has no space to be combined with the front derailleur, for example, the lever cannot be placed.

(c) As shown in Fig. 4 (Fig. 17 of the present invention), the clutch device has a complicated structure, which may occur when the teeth are engaged, and the service life is degraded.

(d) Since it uses a complicated clutch device and the drive mechanism occupies a large space, the overall cost is increased, and the drive mechanism is miniaturized to reduce product competitiveness.

In addition, as shown in the applicant's prior Taiwan patent application (I308892), the driving mechanism of the electric bicycle is disclosed, as shown in the sixteenth figure (Fig. 18 of the present invention), the driving mechanism disclosed therein. In this case, two one-way transmissions (reference numerals 5, 6) are used to respectively transmit the driving torque of the motor and the pedal to the front sprocket. However, as shown in the sixteenth embodiment, one of the first one-way transmissions 5 has a diameter larger than the diameter of the second one-way transmission 6 due to being disposed outside the second one-way transmission 6, so that the first one-way The transmission 5 greatly increases the cost due to the increase in size, and the drive mechanism is disadvantageously miniaturized. Moreover, it is also unable to integrate with the front derailleur due to lack of space.

Therefore, how to provide an electric bicycle and its driving mechanism can solve the above problems, improve the performance of the electric bicycle, and thus develop its application market and value, which is one of the important topics in the current industry.

In view of the above problems, an object of the present invention is to provide an electric bicycle and a drive mechanism thereof, which can solve the conventional problems and improve the performance of the electric bicycle, thereby opening up its application market and value.

To achieve the above object, a driving mechanism for an electric bicycle according to the present invention includes a pedal transmission, at least one front sprocket, a motor transmission, a first one-way transmission, and a second one-way transmission. The pedal transmission includes a pedal shaft. The motor transmission is mounted on the pedal transmission and includes a stator and a rotor having a hollow portion. The motor transmission is coupled to the front sprocket via the first one-way transmission. The second one-way transmission device is disposed in the hollow portion, the pedal rotation shaft is coupled to the front sprocket via the second one-way transmission device, and the second one-way transmission device is not in the first direction perpendicular to the pedal rotation shaft The transmissions are overlapped.

To achieve the above objective, a driving mechanism for an electric bicycle according to the present invention includes a pedal transmission, at least one front sprocket, a motor transmission, a first one-way transmission, and a sensing unit. The pedal transmission includes a pedal shaft. The motor transmission is mounted on the pedal transmission and includes a stator and a rotor having a hollow portion. The motor transmission is coupled to the front sprocket via the first one-way transmission. The sensing unit is disposed in the hollow portion.

In an embodiment, the driving mechanism of the electric bicycle further includes a second one-way transmission disposed on the hollow portion, and the pedal shaft is coupled to the front sprocket via the second one-way transmission.

In an embodiment, the first one-way transmission is opposite to the second one-way transmission, such that when the motor transmission drives the front sprocket to rotate via the first one-way transmission, the pedal shaft does not move. When the pedal shaft drives the front sprocket to rotate via the second one-way transmission, the stator and rotor of the motor transmission are not actuated.

In an embodiment, the first one-way transmission is opposite to the second one-way transmission, and the drive mechanism further includes a clutch. The clutch device couples the motor transmission device to the pedal rotation shaft, so that when the motor transmission device drives the front sprocket to rotate via the first one-way transmission device, the pedal rotation shaft is synchronously activated, and when the pedal rotation shaft is driven via the second one-way transmission device When the front sprocket rotates, the stator and rotor of the motor drive are not actuated.

In an embodiment, when the rotor has a hollow portion, the stator and the rotor are internal rotation motors.

In an embodiment, when the stator has a hollow portion, the stator and the rotor are externally-rotating motors.

In an embodiment, the driving mechanism of the electric bicycle further comprises at least one reduction gear set. The motor transmission is coupled to the front sprocket via a reduction gear set.

In one embodiment, the reduction gear set and the motor transmission are disposed within the same housing, thereby reducing the size of the drive mechanism.

To achieve the above object, the present invention also discloses an electric bicycle including the drive mechanism as described above.

As described above, the driving mechanism of the electric bicycle of the present invention has two unidirectional transmissions, so that when the motor transmission device drives the front sprocket to rotate via the first one-way transmission, the pedal shaft does not move, thereby facilitating the use. When the pedal is rotated by the second one-way transmission to drive the front sprocket, the stator and the rotor of the motor transmission are not actuated, so that the user does not need extra effort to overcome the force of the motor. Labor-saving effect. In addition, the present invention has at least the following advantages:

1. The invention can reduce the rotation speed of the front sprocket and increase the output torque of the motor transmission by the design of the reduction gear set, and can easily enhance the climbing force of the electric bicycle without the aid of the transmission.

2. The invention realizes that the motor transmission device and the pedal transmission device can rotate synchronously by the setting of the clutch device, and the "rejuvenation effect" for forcing the two feet to perform the pedaling action, and the in-situ exercise rehabilitation At the same time, enjoy the leisurely relaxation of beautiful scenery.

3. The present invention provides a hollow portion in the motor to accommodate a one-way transmission device, thereby saving space for the drive mechanism and allowing space to accommodate the transmission above the one-way transmission of the front sprocket. The front sprocket and the lever enable the invention to be combined with the front derailleur, thereby improving the ability of the bicycle to shift and torque. Furthermore, the drive mechanism is miniaturized to enhance product competitiveness.

4. The unidirectional transmission increases the cost with the increase of the size; however, since the two unidirectional transmissions of the present invention are not nested, they are respectively disposed at different positions, that is, in a direction perpendicular to the pedal shaft. The above-mentioned non-overlapping arrangement enables the first and second one-way transmission devices of the present invention to be downsized and thus greatly reduced in cost, and can be directly installed and used by purchasing commercially available standard products without additional customization, thereby simplifying the manufacturing process and Reduce manufacturing costs.

5. The motor of the drive mechanism of the present invention can balance the left and right weight of the vehicle body and can reduce the weight of the vehicle.

In addition, the hollow portion in the motor of the present invention may be provided with a sensing unit, such as a torsion sensing unit or a speed sensing unit, wherein the torsion sensing unit can be applied to an electric bicycle, and the speed sensing unit can be applied to an automatic transmission. Features. Since the sensing unit is disposed in the hollow portion of the motor, it contributes to miniaturization of the product.

Hereinafter, an electric bicycle and a driving mechanism thereof according to a preferred embodiment of the present invention will be described with reference to the accompanying drawings, wherein the same elements will be described with the same reference numerals.

9 is a schematic view of an electric bicycle 1 and a driving mechanism thereof according to a preferred embodiment of the present invention, and FIG. 10 is a cross-sectional view showing a driving mechanism according to a first embodiment of the present invention. Referring to FIG. 9 and FIG. 10, the driving mechanism includes a pedal transmission device 4, at least one front sprocket 3, a motor transmission device 2, a first one-way transmission device 5, and a second one-way transmission device 6. .

The pedal transmission 4 includes a pedal shaft 41. The motor transmission device 2 is mounted on the pedal transmission 4 and includes a stator 22 and a rotor 23. The stator 22 or the rotor 23 may have a hollow portion H, and the rotor 23 has a hollow portion H as an example. The motor transmission 2 is coupled to the front sprocket 3 via a first one-way transmission 5. The second one-way transmission 6 is disposed in the hollow portion H of the rotor 23, and the pedal shaft 41 is coupled to the front sprocket 3 via the second one-way transmission 6.

The drive mechanism of this embodiment will be further described below.

The driving mechanism of this embodiment further includes a rotor holder 24 which is fixed to the rotor 23 and is in the form of a hollow shaft. The drive mechanism further comprises at least one reduction gear set 9 , wherein the drive mechanism comprises two reduction gear sets as an example, and the motor transmission 2 is coupled to the front sprocket 3 via the two reduction gear sets 9 . The motor transmission 2 and the reduction gear set 9 of the present embodiment are disposed in the same outer casing L, and thus are disposed separately from the conventional one. The present invention can reduce the lateral size of the drive mechanism by reducing the thickness of the outer casing between the two. Each of the reduction gear sets 9 may include, for example, a sun gear, a planet gear, a ring gear, and the like. In addition, the driving mechanism may further include at least one gear seat. Here, the two gear bases G1 and G2 are taken as an example, and the gear bases G1 and G2 are respectively fixed to the two reduction gear sets 9, respectively, wherein the gear bases G1 and G2 are respectively For example, the planetary teeth of the two reduction gear sets 9 are fixed, and the gear seats G1 and G2 are in the form of a sleeve. Further, the drive mechanism further includes a transmission sleeve 31 which is fixed to the front sprocket 3 but is not fixed to the pedal shaft 41.

Therefore, when the motor transmission device 2 is actuated, the rotor 23 is rotated by the interaction of the electromagnetic fields, and the output torque is sequentially passed through the rotor holder 24, the two reduction gear sets 9 and the gear holders G1, G2, and the first one-way transmission. The device 5, the transmission sleeve 31, and finally the output torque drive the front sprocket 3 to rotate (i.e., path 1 shown in Fig. 10). At the same time, since the transmission sleeve 31 is not fixed to the pedal shaft 41, the pedal shaft 41 and the pedal (not shown) thereon are not driven, and the user is allowed to ride.

The first one-way transmission device 5 is illustrated here. FIG. 11 is a cross-sectional view along the first one-way transmission device 5. Referring to FIG. 11, the first one-way transmission device 5 can be, for example, a ratchet group. An outer ring portion 51, the outer ring portion 51 is coupled to the gear base G2, the inner ring surface is formed with a tooth groove 511, the outer ring portion 51 is provided with an inner ring portion 52, and the inner ring portion 52 is coupled with the transmission sleeve 31. The outer ring surface is provided with a plurality of teeth members 521 which can be externally stretched and folded, and the tooth members 521 can be externally bent to resist the tooth grooves 511 of the outer ring portion 51 for one-way transmission; When the output torque of the motor transmission 2 is transmitted to the reduction gear set 9 via the rotor mount 24, the outer ring portion 51 is driven, and the inner ring portion 52 is thus driven, so that the transmission sleeve 31 and the front sprocket 3 are driven. . However, since the transmission sleeve 31 is not fixed to the pedal shaft 41, the pedal shaft 41 and the pedal (not shown) on the pedal 41 are not driven, and the user is allowed to ride.

In addition, the second one-way transmission device 6 is fixed to a bearing housing K1, and the bearing housing K1 is exemplified by a sleeve form. Moreover, the rotor holder 24 is not fixed to the bearing housing K1. Therefore, the output torque of the rotor 23 cannot be transmitted to the bearing housing K1 and the second one-way transmission 6 via the rotor holder 24, that is, the torque cannot pass through the second one-way. The transmission device 6 drives the pedal shaft and the pedal crank (not shown) to rotate, thereby facilitating the user to ride.

The electric drive mode of the electric bicycle has been clearly explained above, and the present invention has the advantages of being convenient for the user to ride. The following describes the pedal driving method of the electric bicycle.

Figure 12 is a cross-sectional view showing the second one-way transmission 6 in the case of pedal driving. The second one-way transmission device 6 can be, for example, a ratchet assembly having an outer ring portion 61. The outer ring portion 61 is coupled with the bearing housing K1, and the inner ring surface is formed with a tooth groove 611, and the outer ring portion 61 is provided with an inner portion. The ring portion 62 and the inner ring portion 62 are combined with a pedal sleeve K2 (the pedal sleeve K2 and the pedal shaft 41 are fixedly connected to the second one-way transmission device 6), and the outer ring surface is provided with a plurality of outer rings. The piece and the piece of the toothed member 621 are externally stretched against the slot 611 of the outer ring portion 61 for one-way transmission.

Referring to FIG. 10 and FIG. 12, when the user steps on the pedal crank, the pedal shaft 41 is rotated, and the output torque of the pedal shaft 41 is sequentially passed through the pedal sleeve K2 and the second one-way transmission. The inner ring portion 62 and the outer ring portion 61 and the bearing housing K1 are transferred to the transmission sleeve 31 and the front sprocket 3 (i.e., the path 2 shown in Fig. 10). However, since the rotor holder 24 is not fixed to the bearing housing K1, the output torque of the pedal shaft 41 cannot be transmitted to the rotor holder 24 and the rotor 23 via the bearing housing K1, thereby achieving a labor-saving effect.

Figure 13 is a cross-sectional view showing a driving mechanism of a second embodiment of the present invention. The driving mechanism of the present embodiment further includes a clutch device 8. As shown in FIG. 13, a clutch device 8 is disposed on the transmission sleeve 31. The clutch device 8 can be a screw 81 and a screw. The 81 series radial plug is locked to the transmission sleeve 31, and the threaded section of the screw 81 can be operated to be forced into the groove 82 of the pedal shaft 41, so that the transmission sleeve 31 is coupled with the pedal shaft 41. In this way, when the motor transmission device 2 drives the transmission sleeve 31, the transmission sleeve 31 also drives the internal pedal shaft 41 and the pedal crank to rotate synchronously. Therefore, the electric bicycle of the present invention can also function as a "rehabilitation mode" in the use condition of "electric drive", and the design of the clutch device 8 is mainly used to drive the motor transmission mechanism 2 to drive the front sprocket 3. At the same time, the pedal transmission device 4 of the electric bicycle can be synchronously driven, and then the pedals of the knight can be driven by the pedal transmission device 4 to generate a good rehabilitation function.

By the way, the user can first ride or transport the electric bicycle of the invention to a suitable position (for example, a scenic spot with bright scenery and fresh air), and then position the electric bicycle, and then support the rehabilitation. Sitting on an electric bicycle, the "rehabilitation mode" of the electric bicycle is used to force the legs of the rehabilitation person to perform a pedaling exercise, and to exercise and rejuvenate.

In summary, the clutch device 8 couples the motor transmission device 2 to the pedal shaft 41 such that when the motor transmission device 2 drives the front sprocket 3 to rotate via the first one-way transmission device 5, the pedal shaft 41 is actuated synchronously.

Figure 14 is a cross-sectional view showing a driving mechanism of a third embodiment of the present invention. The motor transmission device 2 of the above embodiment is an internal rotation type motor, that is, the rotor 23 has a hollow portion H, and the motor transmission device of the driving mechanism of the embodiment is an external rotation type motor, that is, the stator 22 has a hollow portion H. . Further, the drive mechanism of this embodiment uses only one reduction gear set 9.

The electric driving method of the electric bicycle of the present embodiment will be described below. When the motor transmission device 2 is actuated, the rotor 23 is rotated by the interaction of the electromagnetic fields, and the output torque is sequentially passed through the rotor holder 24, the reduction gear set 9 and the gear holder G3, the first one-way transmission device 5, and the transmission sleeve. The barrel 31, the final output torque system drives the front sprocket 3 to rotate (i.e., path 1 shown in Fig. 14). At the same time, since the transmission sleeve 31 is not fixed to the pedal shaft 41, the pedal shaft 41 and the pedal (not shown) thereon are not driven, and the user is allowed to ride.

The following is the pedal driving method of the electric bicycle. When the user steps on the pedal crank, the pedal shaft 41 is rotated, and the output torque of the pedal shaft 41 is sequentially passed through the pedal sleeve K2, the inner ring portion 62 and the outer ring portion of the second one-way transmission device 6. 61 (please refer to Fig. 12), the bearing housing K1 is transmitted to the transmission sleeve 31 and the front sprocket 3 (i.e., path 2 shown in Fig. 14).

Since the components of the driving mechanism and the driving manner thereof have been described in detail in the above embodiments, they will not be described again, and can be understood by referring to the first and second embodiments.

In addition, the present embodiment further has a technical feature that the driving mechanism further includes a sensing unit disposed in the hollow portion H. Here, the sensing unit includes a sensor S1 and a magnetic ring S2. The sensing unit can be used in the "electrically assisted" type of electric bicycle of the present embodiment. The so-called electric assist type, that is, when the user pedals, the motor transmission device 2 is activated to assist the user in riding.

Figure 15 is a cross-sectional view showing a driving mechanism of a fourth embodiment of the present invention. The driving mechanism of this embodiment is substantially the same as that of the third embodiment, the main difference being that the rotor 23 of the motor transmission device 2 of the driving mechanism of the present embodiment is not in the same form, so that the path 1 of the embodiment is from the left side of the rotor 23. (Graphic direction) starts. Such a change can be made in response to structural design.

In summary, the driving mechanism of the electric bicycle of the present invention has two unidirectional transmissions, so that when the motor transmission device drives the front sprocket to rotate via the first one-way transmission, the pedal shaft does not move, thereby facilitating the use. When the pedal is rotated by the second one-way transmission to drive the front sprocket, the stator and the rotor of the motor transmission are not actuated, so that the user does not need extra effort to overcome the force of the motor. Labor-saving effect.

In addition, the invention can reliably reduce the rotation speed of the front sprocket and increase the output torque of the motor transmission by the design of the reduction gear set, and can easily enhance the climbing force of the electric bicycle without the aid of the transmission.

In addition, the present invention can make the motor transmission device and the pedal transmission device rotate synchronously by the setting of the clutch device, and the "rejuvenation effect" for forcing the two feet to perform the pedaling action, and the rejuvenation of the in situ movement At the same time, enjoy the leisurely relaxation of beautiful scenery.

In addition, the present invention provides a hollow portion in the motor to accommodate a one-way transmission device, thereby saving space for the drive mechanism and vacating a space for accommodating a plurality of front sprocket and shift lever of the transmission, so that the drive mechanism is miniatured. And improve product competitiveness.

In addition, the unidirectional transmission increases the cost with the increase of the size; however, since the two unidirectional transmissions of the present invention are not nested, but are respectively disposed at different positions, the first and second of the present invention are One-way transmissions can significantly reduce costs, and can be purchased directly from commercially available standards without the need for additional customization, which simplifies manufacturing processes and reduces manufacturing costs.

In addition, the hollow portion in the motor of the present invention may be provided with a sensing unit, such as a torsion sensing unit or a speed sensing unit, wherein the torsion sensing unit can be applied to an electric bicycle, and the speed sensing unit can be applied to an automatic transmission. Features. Since the sensing unit is disposed in the hollow portion of the motor, it contributes to miniaturization of the product.

The above is intended to be illustrative only and not limiting. Any equivalent modifications or alterations to the spirit and scope of the invention are intended to be included in the scope of the appended claims.

A1, B1, C1, D1, E1, F1. . . motor

A2. . . Transmission component

A3, B3. . . Sprocket

A4, E5, F4. . . Chain

B2, 11. . . Frame

C2. . . Front wheel

D2. . . rear wheel

E2, F2, 3. . . Front sprocket

E3, F3. . . Pedal drive shaft

E4. . . Steering transmission component

F5. . . transmission

F51. . . One-way transmission component

1. . . Electric bicycle

2. . . Motor drive

twenty two. . . stator

twenty three. . . Rotor

twenty four. . . Rotor holder

31. . . Drive sleeve

4. . . Pedal transmission

41. . . Pedal shaft

5. . . First one-way transmission

5', 6'. . . One-way transmission

51, 61. . . Outer ring

511, 611. . . Cogging

52, 62. . . Inner ring

521, 621. . . Toothed parts

6. . . Second one-way transmission

60, 8. . . Clutch device

70. . . One-way bearing

81. . . Screw

82. . . Groove

9. . . Reduction gear set

G1～G3. . . Gear seat

H. . . Hollow part

K1. . . Bearing housing

K2. . . Foot sleeve

L. . . shell

S1. . . Sensor

S2. . . Magnetic ring

1 is a schematic view showing the appearance of an electric bicycle using the first type of transmission mode;

2 is a schematic view showing the appearance of an electric bicycle using a second type of transmission method;

Figure 3 is a schematic view of the appearance of an electric bicycle using the third type of transmission mode;

Figure 4 is a second schematic view of the appearance of an electric bicycle using the third type of transmission;

Figure 5 is a schematic view of the appearance of an electric bicycle using the fourth type of transmission mode;

Figure 6 is a second schematic view of the appearance of an electric bicycle using the fourth type of transmission mode;

Figure 7 is a cross-sectional view of the transmission device of Figure 6;

Figure 8 is a schematic structural view of the one-way transmission component of Figure 7;

9 is a schematic view showing the appearance of an electric bicycle according to a preferred embodiment of the present invention;

Figure 10 is a cross-sectional view showing a driving mechanism of a first embodiment of the present invention;

Figure 11 is a schematic cross-sectional view along the first one-way transmission;

Figure 12 is a schematic cross-sectional view along the second one-way transmission;

Figure 13 is a cross-sectional view showing a driving mechanism of a second embodiment of the present invention;

Figure 14 is a cross-sectional view showing a driving mechanism of a third embodiment of the present invention;

Figure 15 is a cross-sectional view showing a driving mechanism of a fourth embodiment of the present invention;

16 to 18 are schematic views of a conventional drive mechanism.

2. . . Motor drive

twenty two. . . stator

twenty three. . . Rotor

twenty four. . . Rotor holder

3. . . Front sprocket

31. . . Drive sleeve

4. . . Pedal transmission

41. . . Pedal shaft

5. . . First one-way transmission

6. . . Second one-way transmission

9. . . Reduction gear set

G1, G2. . . Gear seat

H. . . Hollow part

K1. . . Bearing housing

K2. . . Foot sleeve

L. . . shell

Claims (11)

A driving mechanism for an electric bicycle comprises: a pedal transmission device comprising a pedal shaft; at least one front sprocket; a motor transmission device mounted on the pedal transmission device and comprising a stator and a rotor, The stator or the rotor has a hollow portion; a first one-way transmission, the motor transmission device is coupled to the front sprocket via the first one-way transmission; and a second one-way transmission device is disposed at the a hollow portion, the pedal shaft is coupled to the front sprocket via the second one-way transmission, and the second one-way transmission device does not cooperate with the first one-way transmission in a direction perpendicular to the pedal shaft Overlap settings. The driving mechanism of the electric bicycle according to claim 1, further comprising: a sensing unit disposed in the hollow portion. The driving mechanism of the electric bicycle according to claim 1, further comprising: a rotor fixing frame fixed to the rotor; and a bearing seat fixed to the second one-way transmission device, and not Fixing with the rotor holder such that one of the output torques of the rotor cannot be transmitted to the bearing housing and the second one-way transmission via the rotor holder, or one of the output shafts of the pedal shaft cannot be torqued through the second A one-way transmission and the bearing housing are transferred to the rotor mount and the rotor. The driving mechanism of the electric bicycle according to claim 1, further comprising: a clutch device, the clutch device coupling the motor transmission device to the pedal shaft, so that when the motor transmission device passes the first single When the front sprocket is rotated to the transmission, the pedal shaft is actuated synchronously. The driving mechanism of the electric bicycle according to claim 1, wherein when the rotor has the hollow portion, the stator and the rotor are internal rotation motors. The driving mechanism of the electric bicycle according to claim 1, wherein when the stator has the hollow portion, the stator and the rotor are external rotation motors. The driving mechanism of the electric bicycle according to claim 1, further comprising: at least one reduction gear set, wherein the motor transmission is coupled to the front sprocket via the reduction gear set. The driving mechanism of the electric bicycle according to claim 7, wherein the reduction gear set and the motor transmission are disposed in the same casing. An electric bicycle comprising a driving mechanism as described in claim 1 of the patent application. An electric bicycle comprising a driving mechanism as described in claim 4 of the patent application. An electric bicycle comprising a driving mechanism as described in claim 7 of the patent application.