TWM516556U - Hybrid power mechanism and electric bicycle thereof - Google Patents

Description

Composite power mechanism and electric bicycle

This creation is about a power mechanism and an electric bicycle, especially a power mechanism that integrates brushless motor power and pedal power and its electric bicycle.

The mainstream of today's electric bicycle motors has changed from a brush motor to a brushless motor many years ago. The brushless motor has the advantages of small size and high efficiency, and can be made into multi-pole (10-pole to 32-pole) speed. slow. In addition, in the development of electric bicycles, the structure has a hub motor design, which is used to directly mount the motor on the front or rear wheels of the bicycle, no longer through the chain transmission, but the hub motor is easy to cause the imbalance of the bicycle center of gravity and The problem of water ingress, therefore, the disadvantages of the above-described hub motor can be overcome by using a center motor provided on the bicycle frame. However, the problem in the application of the brushless motor is how to connect with the pedal crank, so that in addition to the power of the electric motor, the bicycle can also allow the user to step on the auxiliary power, and the structure thereof should not be too complicated and complicated, for example, without passing through the gear box. Speed shifting to reduce its manufacturing costs and power loss is a problem that the creative office must actively overcome.

The purpose of this creation is to provide a composite power mechanism and its electric bicycle, which integrates motor power and pedal power into a power machine. Structure, to achieve the purpose of electric and pedal power can be driven at the same time, the volume is reduced, and the manufacturing cost is reduced.

In order to achieve the above object, the present composite power mechanism preferably includes: a motor casing, the motor casing is provided with a shaft hole on opposite sides thereof; and a motor driving shaft disposed between the shaft holes on both sides of the motor casing, the motor The center of the drive shaft is provided with an inner shaft hole communicating with the two ends; a stator coupled to the motor casing; and a rotor coupled to the motor drive shaft; and a crank drive shaft disposed at the inner shaft hole of the motor drive shaft, The two ends of the crank drive shaft protrude from the two ends of the motor drive shaft; a one-way ratchet coupled to one end of the motor drive shaft; a one-way ratchet coupled to one end of the crank drive shaft; and a combination of the two one-way A driving sprocket between the ratchets, the one-way ratchet respectively drives the driving sprocket to rotate in one direction to be transmitted to the rear wheel of the bicycle.

In order to achieve the above object, the electric bicycle of the present invention preferably includes: the motor casing is horizontally coupled to a joint portion of a bicycle frame, and the joint portion is a junction of the rear fork and the riser and the lower pipe of the frame. Wherein the two ends of the crank drive shaft are located on both sides of the bicycle; the bicycle frame or the rear shelf is provided with a 48 volt lithium battery unit with a variable frequency stepless transmission, so that the lithium battery unit with the variable frequency stepless transmission is electrically a coil connected to the stator; and the drive sprocket is wound around a chain, and the chain is wound around a rear single-stage or multi-stage one-way flywheel set of the bicycle.

The composite power mechanism and the electric bicycle thereof have the following functions: (1) the motor drive shaft is a hollow shaft, and the crank drive shaft is inserted into the motor drive shaft, so that the single shaft structure is integrated to avoid the separation of the two shafts. Achieve the effect of reducing the size of the motor. (b) the above-mentioned integrated uniaxial structure, The one-way ratchet can be combined separately, and the one-way ratchet is combined with the driving sprocket, so that the motor drive shaft and the crank drive shaft can respectively drive the bicycle single or multi-stage flywheel group without mutual interference, and the motor power and the pedal Power can be carried out at the same time, improving the travel and horsepower of electric bicycles. (3) The one-way ratchet and the drive sprocket are each standardized components of the industry, and do not need to be separately processed and manufactured, as long as the combination of the above structures can produce an effect, and the manufacturing cost of the motor is relatively reduced. (4) The motor can adopt the structure of multi-pole low-speed brushless motor, which has the advantages of small size and high efficiency compared with the brush motor.

10‧‧‧Bicycle

101‧‧‧ frame

102‧‧‧Combination Department

103‧‧‧After shelves

20‧‧‧Chain

30‧‧‧Lithium battery unit

1‧‧‧ motor casing

11, 11'‧‧‧ shaft hole

12‧‧‧Main housing

13‧‧‧ side cover

14‧‧‧ openings

15, 15'‧‧‧ first bearing

2‧‧‧Motor drive shaft

21‧‧‧Inner shaft hole

22‧‧‧ bushing

23‧‧‧ flat key

24, 24'‧‧‧ second bearing

25‧‧‧ buckle

3‧‧‧Group stator

31‧‧‧ Ring body

311‧‧‧ Groove

32‧‧‧ coil unit

321‧‧‧ lower coil unit

322‧‧‧Upper coil unit

4‧‧‧Rotor

41‧‧‧ permanent magnet

5‧‧‧Crank drive shaft

51‧‧‧ crank joint

52‧‧‧ bushings

53‧‧‧ semi-circular keys

54‧‧‧ buckle

6, 6'‧‧‧ one-way ratchet

7‧‧‧Active sprocket

71‧‧‧Fixed components

72‧‧‧Spring washers

73‧‧‧ nuts

8‧‧‧ pedal crank

FIG. 1 is a schematic perspective view of a combination of embodiments of the composite power mechanism of the present invention.

FIG. 2 is a schematic cross-sectional view showing a combination of embodiments of the composite power mechanism of the present invention.

FIG. 3 is a first exploded schematic view of an embodiment of the composite power mechanism of the present invention.

4 is a second exploded view of an embodiment of the composite power mechanism of the present invention.

Figure 5 is a partial side elevational view of the stator and rotor of the present invention.

FIG. 6 is a schematic diagram 1 of an embodiment of an electronic bicycle according to the present invention.

FIG. 7 is a schematic diagram 2 of an embodiment of the present invention applied to an electric bicycle.

The structural features of the present creation and other functions and purposes are described in detail in the following embodiments:

Referring to FIG. 1 and FIG. 2, the composite power mechanism of the present invention is used for mounting on an electric bicycle, so that the electric bicycle can simultaneously apply motor power and pedal power. The preferred embodiment includes a motor casing 1 and a motor. Drive shaft 2, a set of stators 3 and rotors 4, a crank drive shaft 5, two a one-way ratchet 6, 6' and a drive sprocket 7, wherein the motor casing 1 is for fixing to the frame 101 of the bicycle 10 (as shown in FIG. 6 or FIG. 7), and the motor casing 1 can be closed. a hollow housing having a shaft hole 11 , 11 ′ on each side; specifically, as shown in FIGS. 2 and 4 , the motor housing 1 includes a main housing 12 , and a main housing 12 is coupled to the main housing 12 . The side cover 13 has a shaft hole 11 on one side and an opening 14 on the other side; the side cover 13 is coupled to the opening 14 on the side of the main casing 12, and the side cover 13 is also provided with a shaft hole 11'. A first bearing 15, 15' is provided in each of the shaft holes 11, 11' to support the rotation of the motor drive shaft 2 by the first bearings 15, 15'.

As shown in FIG. 3, the motor drive shaft 2 is a hollow rotating shaft which is rotatably disposed between the first bearings 15, 15' of the shaft holes 11, 11' on both sides of the motor casing 1, so that the two ends are respectively passed through The first bearing 15, 15' has a one end slightly protruding from the motor casing 1. In particular, the motor drive shaft 2 is provided with an inner shaft hole 21 communicating with both ends to provide a crank drive shaft 5.

As shown in FIG. 2 and FIG. 5, the stator 3 and the rotor 4 are power sources of the motor, wherein the stator 3 is coupled to the inner wall of the main casing 12 of the motor casing 1, and the stator 3 preferably includes a ring body 31 and a ring. The inner ring surface of the body 31 is provided with 27 grooves 311, and each of the grooves 311 is provided with a coil unit 32. The coil unit 32 includes a lower coil unit 321 and an upper coil unit 322 which are respectively wound, and the coil unit 32 The copper wire diameter is 1-2 grades thicker than the existing motor copper wire; and the rotor 4 is a 32-pole permanent magnet rotor coupled to the motor drive shaft 2, and the permanent surface of the rotor 4 is combined with 32 corresponding coil units 32. The magnet 41, when the coil winding of the stator 3 is supplied with a three-phase current, generates a rotating magnetic field in the stator 3 synchronized with the rotational speed of the power supply frequency, thereby driving the rotor 4 and the motor drive shaft 2 to rotate. move.

As shown in FIG. 2 and FIG. 3, the crank drive shaft 5 provides pedal power to drive the bicycle, and the crank drive shaft 5 is rotatably disposed in the inner shaft hole 21 of the motor drive shaft 2, and the two ends thereof respectively protrude from the motor drive shaft. The two ends of the two are respectively provided with a crank joint portion 51 at both ends, and the crank joint portion 51 can be a quadrangular column, whereby a pedal crank 8 can be coupled to each crank joint portion 51 to provide a user pedal pedal. 8. The crank drive shaft 5 is further rotated.

As shown in FIG. 2 and FIG. 3, the two one-way ratchets 6, 6' include a one-way ratchet 6 coupled to one end of the motor drive shaft 2 (presenting one end of the motor casing 1), so that the one-way ratchet 6 can be The motor drive shaft 2 rotates forward, and the motor drive shaft 2 only rotates when it rotates backward, and does not drive the first one-way ratchet 6 to rotate backward; the other one-way ratchet 6' is coupled to one end of the crank drive shaft 5 (with the motor drive) The shaft 2 is at the same end, so that the one-way ratchet 6' is driven forward by the crank drive shaft 5. When the crank drive shaft 5 rotates backward, it can only idle, and does not drive the one-way ratchet 6' to rotate backward. The one-way ratchets 6, 6' may specifically be single-toothed flywheels having sprocket wheels, which are existing standard bicycle components, and may be provided with 18-tooth single-tooth flywheels, without the need for additional manufacture.

As shown in FIG. 2 and FIG. 3, the driving sprocket 7 is also an existing standard component, specifically a 26 to 36-tooth active sprocket, and the driving sprocket 7 is placed on the two-way ratchet 6, 6'. And at least one fixing member 71 is coupled to the driving sprocket 7. The fixing member 71 can be a bolt passing through the driving sprocket 7, and a spring washer 72 and a nut 73 locked to the bolt, so that the fixing member 71 is stuck. The sprocket around the two one-way ratchets 6, 6' (ie, the single-tooth flywheel), and the spring washer 72 and the nut 73 prevent the fixing member 71 from coming loose, thereby making the two unidirectional The ratchets 6, 6' can respectively drive the drive sprocket 7 to rotate forward, and the drive sprocket 7 is further transmitted through the chain to the single-stage or multi-stage one-way flywheel set of the bicycle rear wheel.

The above-mentioned structural design constitutes the composite power mechanism of the present invention, and as shown in FIG. 6 and FIG. 7, it can be further installed and applied to a bicycle 10, which is composed of an electric bicycle, and the preferred installation application embodiment of the present invention is The motor casing 1 is horizontally coupled to a joint portion 102 of the frame 101 of the bicycle 10. The joint portion 102 is preferably a rear fork of the frame 101, a junction of the riser and the lower pipe, that is, a conventional bicycle. a large sprocket mounting portion, whereby both ends of the crank drive shaft 5 are laterally located on both sides of the bicycle 10, so that the pedal crank 8 can be coupled to both ends of the crank drive shaft 5; and then, the drive sprocket 7 is wound A chain 20 is provided to wrap the chain 20 around a rear single or multi-stage one-way flywheel set (not shown) of the bicycle 10; and the frame 101 (shown in Figure 7) or the rear shelf 103 of the bicycle 10 (e.g. 6 can be provided with a 48 volt lithium battery unit 30 with a variable frequency stepless transmission, and the lithium battery unit 30 with the variable frequency stepless transmission is electrically connected to the coil of the stator 3 described above, thereby forming an electric motor. bicycle.

As shown in FIG. 2 and FIG. 3, one end of the motor drive shaft 2 can be coupled to a sleeve 22 via a 2×2 flat key 23, and one end of the crank drive shaft 5 is coupled by a 3×10 semi-circular key 53. A bushing 52, whereby one of the bushings 22 is coupled to the one-way ratchet 6 by a screwing structure, and the other bushing 52 is coupled to the one-way ratchet 6' by a screwing structure. Moreover, the shaft body of the crank drive shaft 5 may be provided with a buckle 54. The buckle 54 is preferably a C-shaped buckle, so that the buckle 54 abuts against the end surface of the sleeve 52 to reach the axial limit sleeve. 52 and the function of the one-way ratchet 6'; and one end of the motor drive shaft 2 may be provided with a buckle The ring 25, the buckle 25 is preferably a C-shaped buckle, so that the buckle 25 abuts against the end surface of the sleeve 22 to achieve the function of axially limiting the sleeve 22 and the other one-way ratchet 6. Furthermore, the inner shaft holes 21 at the two ends of the motor drive shaft 2 may be respectively provided with a second bearing 24, 24', so that the crank drive shaft 5 is disposed between the second bearings 24, 24' of the inner shaft hole 21. The function of rolling the frictional force of the crank drive shaft through the steel balls of the second bearing 24, 24' in the motor drive shaft 2 is achieved.

When the composite power mechanism of the present invention is used, as shown in FIG. 2 and FIG. 6, the stator 3 can be energized to rotate the rotor 4 and the motor drive shaft 2, and the 32-pole function does not require a conventional reduction gear set. The stepless speed is 0~200rpm/min, and then the driving sprocket 7 is driven forward through the one-way ratchet 6 (single-tooth flywheel), and the rear wheel of the bicycle is rotated by the driving sprocket 7 and the chain 20, thereby making the electric bicycle a motor The power advances, and at this time, the other one-way ratchet 6' (single-toothed flywheel) is equal to idling, so that the pedal crank 8 is not rotated, and the user can step on it without any force. On the other hand, if climbing or power is exhausted, the pedal crank 8 can be rotated by the pedal drive shaft 5, and the crank drive shaft 5 can be driven forward through the one-way ratchet 6' (single-tooth flywheel). The wheel 7, while the other one-way ratchet 6 is also idling, does not drive the motor drive shaft 2 and the rotor 4, so the user rides the bicycle in a labor-saving manner.

In summary, the composite power mechanism and its electric bicycle have been practical and creative, and the application of its technical means is also novel and undoubted, and the efficacy and design purpose are in line with the fact that it has been reasonably improved. To this end, a new type of patent application is filed according to law, and the bureau is invited to give a detailed examination, and the patent is granted as a prayer.

1‧‧‧ motor casing

11, 11'‧‧‧ shaft hole

12‧‧‧Main housing

13‧‧‧ side cover

14‧‧‧ openings

15‧‧‧First bearing

2‧‧‧Motor drive shaft

21‧‧‧Inner shaft hole

22‧‧‧ bushing

23‧‧‧ flat key

24‧‧‧second bearing

25‧‧‧ buckle

3‧‧‧Group stator

31‧‧‧ Ring body

311‧‧‧ Groove

32‧‧‧ coil unit

321‧‧‧ lower coil unit

322‧‧‧Upper coil unit

4‧‧‧Rotor

41‧‧‧ permanent magnet

5‧‧‧Crank drive shaft

51‧‧‧ crank joint

52‧‧‧ bushings

53‧‧‧ semi-circular keys

54‧‧‧ buckle

6, 6'‧‧‧ one-way ratchet

7‧‧‧Active sprocket

71‧‧‧Fixed components

72‧‧‧Spring washers

73‧‧‧ nuts

8‧‧‧ pedal crank

Claims (10)

A composite power mechanism for mounting on a bicycle includes: a motor casing having a shaft hole on opposite sides of the motor casing; and a motor driving shaft disposed between the shaft holes on both sides of the motor casing, the motor The center of the drive shaft is provided with an inner shaft hole communicating with the two ends; a stator coupled to the motor casing; and a rotor coupled to the motor drive shaft; and a crank drive shaft disposed at the inner shaft hole of the motor drive shaft, The two ends of the crank drive shaft protrude from the two ends of the motor drive shaft; a one-way ratchet coupled to one end of the motor drive shaft; a one-way ratchet coupled to one end of the crank drive shaft; and a combination of the two one-way A driving sprocket between the ratchets, the one-way ratchet respectively drives the driving sprocket to rotate in one direction to be transmitted to the rear wheel of the bicycle. The composite power mechanism of claim 1, wherein the motor casing comprises a main casing and a side cover; the main casing is provided with a shaft hole on one side and an opening on the other side; the side cover is coupled thereto An opening of the main casing, the side cover is provided with the shaft hole; each of the shaft holes is provided with a first bearing, and the motor driving shaft is disposed on the first bearing. The composite power mechanism of claim 1, wherein the one-way ratchet is a single-speed flywheel having a sprocket, the driving sprocket is coupled with a fixing component, and the fixing component is clamped to each of the single-tooth flywheels. Chain teeth. The hybrid power mechanism of claim 3, wherein the motor drive shaft and the crank drive shaft respectively engage a sleeve, and the sleeve respectively engages a one-way ratchet of the motor drive shaft, and the crank drive shaft is unidirectionally ratcheted. The hybrid power mechanism of claim 4, wherein the inner shaft holes of the two ends of the motor drive shaft are respectively provided with a second bearing, and the crank drive shaft passes through the second bearing. The composite power mechanism of claim 1, wherein the stator comprises a ring body having a plurality of grooves distributed on the inner annular surface, and each of the grooves is provided with a coil unit. The hybrid power mechanism of claim 6, wherein the coil unit comprises a lower coil unit and an upper coil unit respectively wound. The composite power mechanism of claim 6, wherein the surface of the rotor incorporates a plurality of permanent magnets corresponding to the coil unit. The composite power mechanism of claim 1, wherein each of the two ends of the crank drive shaft is provided with a crank joint, and each of the crank joints is combined with a pedal crank. An electric bicycle includes: a bicycle having a joint portion at a bottom thereof, the joint portion being a rear fork of the frame, a junction of the riser and the down tube, and a frame or a rear shelf of the bicycle a lithium battery unit with a variable frequency stepless transmission; a motor casing fixed to the joint portion of the bicycle, the motor casing is provided with a shaft hole on opposite sides thereof; and a motor disposed between the shaft holes on both sides of the motor casing a driving shaft, an inner shaft hole connecting the two ends of the motor driving shaft; a stator coupled to the motor housing, the stator is electrically connected to the lithium battery unit of the variable frequency stepless transmission, and a motor is coupled to the motor a rotor of the drive shaft; one disposed within the motor drive shaft a crank drive shaft of the shaft hole, the two ends of the crank drive shaft protrude from both ends of the motor drive shaft; a one-way ratchet coupled to one end of the motor drive shaft; and a one-way ratchet coupled to one end of the crank drive shaft; A driving sprocket coupled between the two one-way ratchets, the driving sprocket is wound around a chain, and the chain is wound around a rear one-way flywheel set of the rear wheel of the bicycle.