TWM499367U - Pedal/motor dual power mechanism and electric bike thereof - Google Patents

Description

Foot motor power mechanism and electric bicycle

The present invention relates to a power mechanism and an electric bicycle, and more particularly to a gearless horizontal power mechanism that integrates brushless motor power and pedal power, and an electric bicycle composed of the power mechanism.

Today's electric bicycles mainly drive the wheels through the power of the motor. According to the conventional motor technology, the drive shaft must be driven by the gearbox to convert it into a better speed, thus driving the wheels of the bicycle, such as the creator of the case. Proposed that the Republic of China Patent Announcement No. 361431, the electric assisted motor motor pedal concentric outer shaft output, the pedal inner shaft input transmission mechanism, the electric pedal bicycle motor transmission mechanism shown in No. 217013, and the 246274 No. The motor vehicle uses a brushless drive motor.

Nowadays, the mainstream of 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. Very 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 center-mounted 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 Gearbox shifting to reduce its manufacturing cost and power loss is a problem that the creative office must actively overcome.

The purpose of the present invention is to provide a pedal motor power mechanism and an electric bicycle thereof, which integrates a motor drive shaft and a pedal crank drive shaft into a single shaft structure, and through a design of a drive sprocket, a motor drive shaft and a crank drive shaft They do not interfere with each other, and thus the 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 invention provides a pedal motor power mechanism and an electric bicycle thereof, wherein a preferred technical solution of the pedal motor power mechanism comprises: a motor casing for fixing to the bicycle frame, the motor casing is closed The air bearing housing is respectively provided with a shaft hole on opposite sides thereof; a motor driving shaft rotatably disposed between the shaft holes on both sides of the motor casing, and an inner shaft hole connecting the two ends is disposed in the center of the motor driving shaft; a stator coupled to the motor casing, and a rotor coupled to the motor drive shaft, the stator corresponding to the rotor to drive the rotor and the motor drive shaft to rotate; a rotationally disposed inner shaft of the motor drive shaft a crank drive shaft of the hole, the two ends of the crank drive shaft respectively protrude from opposite ends of the motor drive shaft; a first one-way ratchet coupled to one end of the motor drive shaft, the first one-way ratchet is driven by the motor a second one-way ratchet coupled to one end of the crank drive shaft, the second one-way ratchet is driven by the crank to drive the front drive; and a combination a driving sprocket between the first one-way ratchet and the second one-way ratchet, the first one-way ratchet and the second one-way ratchet respectively driving the driving sprocket, and the driving sprocket is driven by the chain to the The rear wheel of the bicycle.

The preferred technical solution of the present electric bicycle 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 of the frame, the riser and the lower pipe, so that The two ends of the crank drive shaft are located on two sides of the bicycle; 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 pedal motor 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 two shafts. Separate to achieve the effect of reducing the size of the motor. (2) The integrated single-shaft structure can combine the one-way ratchet and the one-way ratchet 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, and each other They do not interfere with each other, and both motor power and pedal power can be carried out at the same time, improving the travel and horsepower of the electric bicycle. (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.

1‧‧‧ motor casing

11‧‧‧Axis hole

12‧‧‧Main housing

13‧‧‧ side cover

14‧‧‧First bearing

2‧‧‧Motor drive shaft

21‧‧‧Inner shaft hole

22‧‧‧First bearing housing

221‧‧‧Inner hole

222‧‧‧ screw holes

223‧‧‧ counterbore screws

224‧‧‧ external thread

23‧‧‧External thread

24, 24'‧‧‧ second bearing

3‧‧‧ Stator

4‧‧‧Rotor

5‧‧‧Crank drive shaft

51‧‧‧ crank joint

52‧‧‧Second bearing

521‧‧‧Neutral hole

522‧‧‧ external thread

53‧‧‧External thread

54, 54'‧‧‧ buckle

6‧‧‧First unidirectional ratchet

6’‧‧‧Second one-way ratchet

7‧‧‧Active sprocket

71‧‧‧Fixed components

8‧‧‧ pedal crank

10‧‧‧Bicycle

101‧‧‧ frame

102‧‧‧Combination Department

20‧‧‧Chain

The first figure is a schematic perspective view of the combination of the embodiment of the pedal motor power mechanism.

The second figure is a schematic cross-sectional view of a combined embodiment of the pedal motor power mechanism.

The third figure is a first exploded schematic view of an embodiment of the creative pedal motor power mechanism.

The fourth figure is a second exploded view of the embodiment of the pedal motor power mechanism.

The fifth figure is a perspective view of an embodiment in which the creation is combined into an electric bicycle.

The structural features and other functions and purposes of the present invention are described in detail below with reference to the accompanying drawings. Referring to the first and second figures, the foot motor power mechanism of the present invention is used for mounting on a bicycle to make an electric bicycle. The motor power and the pedal power can be applied at the same time. The preferred embodiment includes a motor casing 1, a motor drive shaft 2, a set of stators 3 and 4, a crank drive shaft 5, and two one-way ratchets 6. 6' and a driving sprocket 7, wherein: the motor casing 1 is for fixing to the frame 101 of the bicycle 10 (as shown in FIG. 5), and the motor casing 1 is preferably embodied as a closed hollow casing. The body is respectively provided with a shaft hole 11 on opposite sides thereof for providing the motor drive shaft 2; more specifically, the motor case 1 can be an annular main casing 12, and two transmission screws are coupled to the main body. The side cover 13 on both sides of the casing 12 is formed, and the side cover 13 is respectively provided with a shaft hole 11, and a first bearing 14 is disposed in the shaft hole 11, and the first bearing 14 supports the rotation of the motor drive shaft 2.

The motor drive shaft 2 is a hollow rotating shaft, which is rotatably disposed Between the first bearings 14 of the shaft holes 11 on both sides of the motor casing 1, the two ends are respectively disposed on the first bearing 14, and one end slightly protrudes from the motor casing 1, and particularly, a communication is provided in the center of the motor drive shaft 2. Inner shaft holes 21 at both ends to provide a crank drive shaft 5.

The stator 3 and the rotor 4 are power sources of the motor, wherein The sub 3 is coupled to the inner wall of the main casing 12 of the motor casing 1, and the rotor 4 is a 32-pole permanent magnet rotor coupled to the motor drive shaft 2. When the coil winding of the stator 3 is supplied with a three-phase current, the stator is A rotating magnetic field synchronized with the rotational speed of the power supply frequency is generated in the motor 3 to drive the rotor 4 and the motor drive shaft 2 to rotate.

The crank drive shaft 5 provides pedal power for driving itself a crankshaft of the vehicle, the crank drive shaft 5 is rotatably disposed in the inner shaft hole 21 of the motor drive shaft 2, and both ends of the crank drive shaft 5 respectively protrude from the two ends of the motor drive shaft 2, and respectively on the crank drive shaft 5 A crank joint portion 51 is disposed at both ends, and the crank joint portion 51 can be a quadrangular column or a cylinder having a sliding groove on the surface, whereby a pedal crank 8 can be coupled to each of the crank joint portions 51 to provide a user's pedal. The pedal crank 8 further rotates the crank drive shaft 5.

The two one-way ratchets 6, 6' include a motor coupled to the motor The first one-way ratchet 6 of one end of the drive shaft 2 (projecting one end of the motor casing 1) causes the first one-way ratchet 6 to be driven forward by the motor drive shaft 2, and only rotates the motor drive shaft 2 when it rotates backward, and cannot be driven. a first one-way ratchet 6; the other is a second one-way ratchet 6' coupled to one end of the crank drive shaft 5 (the same end as the motor drive shaft 2), causing the second one-way ratchet 6' to be driven forward by the crank drive shaft 5 When the rotation is backward, the crank drive shaft 5 can only be idling, and the second one-way ratchet 6' cannot be driven. The first and second one-way ratchets 6, 6' may specifically be sprocket-shaped The single-tooth flywheel, the single-tooth flywheel is an existing standard component, and the 18-tooth single-tooth flywheel can be used without further manufacturing.

The drive sprocket 7 is also an existing standard component, specific The utility model can be a 36-tooth active sprocket, and the driving sprocket 7 is sleeved between the first one-way ratchet 6 and the second one-way ratchet 6', and the driving sprocket 7 is combined with one or more fixing elements 71 for fixing. The element 71 may be a bolt passing through the driving sprocket 7 such that the fixing element 71 (bolt) is clamped to the sprocket around the two one-way ratchets 6, 6' (ie, the single-tooth flywheel), so that the two one-way ratchets 6 The 6' can respectively drive the driving sprocket 7 to rotate forward, and the driving sprocket 7 is further transmitted through the chain to the single-stage or multi-stage one-way flywheel group of the bicycle rear wheel.

By the above-mentioned structural design, the pedal motor of the present composition is composed The force mechanism, as shown in the fifth figure, can be further installed and applied to a bicycle 10, and is composed of an electric bicycle. The preferred installation application embodiment of the present invention is to make the motor casing 1 horizontally coupled to the bicycle 10. a joint portion 102 of the frame 101, the joint portion 102 is preferably a rear fork of the frame 101, a junction of the riser and the down tube, that is, a conventional bicycle large sprocket mounting portion, thereby driving the crank Both ends of the 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; then, a chain 20 is wound around the drive sprocket 7, and the chain 20 is wound around A rear single-stage or multi-stage one-way flywheel set (not shown) of the bicycle 10 thereby forming an electric bicycle.

As shown in the second and third figures, the motor drive shaft 2 protrudes from one end of the motor casing 1 and can be combined with a first bearing block 22, and the first one-way ratchet 6 is coupled through the first bearing block 22; and the crank drive shaft 5 at the same end can be combined with a second bearing block 52, Combining the second through the second bearing block 52 One way ratchet 6'. The combination structure of the motor drive shaft 2 and the first bearing housing 22 can be various. Specifically, an external thread portion 23 can be disposed at one end of the motor drive shaft 2, and the first bearing housing 22 is provided with a screwing portion of the external thread portion 23. The inner screw hole 221 is provided with a radial screw hole 222 in the first bearing housing 22, and a counterbore screw 223 is locked in the screw hole 222, so that the counterbore screw 223 is tightly fixed to the motor drive shaft 2. The combination structure of the crank drive shaft 5 and the second bearing housing 52 can be various. Specifically, the crank drive shaft 5 is provided with an external thread portion 53 and the second bearing housing 52 is screwed into the external thread portion 53. The screw hole 521 is coupled to the crank drive shaft 5 by the second bearing housing 52.

As shown in the second and third figures, the first bearing housing 22 and the second bearing housing 52 are respectively combined with the two unidirectional ratchets 6, 6', and the first bearing housing is optional. 22 and a peripheral portion of the second bearing housing 52 are respectively provided with a screw thread 224, 522 screwed to each of the one-way ratchets 6, 6', and a flange respectively abutting the end of each of the one-way ratchets 6, 6', thereby the motor The drive shaft 2 is coupled to the first one-way ratchet 6 through the first bearing housing 22, and the crank drive shaft 5 is coupled to the second one-way ratchet 6' through the second bearing housing 52.

As shown in the second and third figures, a second bearing 24 is disposed in the first bearing housing 22 at one end of the motor drive shaft 2, and a motor side cover 13 is disposed in the other end of the motor drive shaft 2. There is a second bearing 24' whereby the crank drive shaft 5 is passed through the second bearings 24, 24', thereby reducing the friction between the crank drive shaft 5 and the motor drive shaft 2. Moreover, the shaft body of the crank drive shaft 5 can be respectively provided with a buckle 54 and 54' abutting against the end faces of the first bearing housing 22 and the second bearing housing 52. The buckles 54 and 54' are preferably C. Shaped buckle.

When the pedal motor power mechanism is used, referring to the second figure, the stator 3 can be energized, the rotor 4 and the motor drive shaft 2 are rotated, and then the first one-way ratchet 6 (single-tooth flywheel) is driven forward. The sprocket 7 thus advances the electric bicycle with motor power, and at this time, the second one-way ratchet 6' (single-toothed flywheel) is equal to idling, so that the pedal crank 8 is not rotated, and the user can exert no force at all. Step on. On the other hand, if climbing or power is exhausted, the pedal crank 8 can be rotated by the pedal power to drive the crank drive shaft 5, and the crank drive shaft 5 is driven forward through the second one-way ratchet 6' (single-tooth flywheel). The drive sprocket 7 and the first one-way ratchet 6 (single-tooth flywheel) are also idling at this time, and the motor drive shaft 2 and the rotor 4 are not driven, so that the user rides the bicycle in a labor-saving manner.

In summary, the creation of the foot motor power mechanism and its electric bicycle has been practical and creative, and the application of its technical means is also novel and undoubted, and the effect and design purpose are in line with the fact that it has been reasonably improved to Bright. 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‧‧‧Axis hole

12‧‧‧Main housing

13‧‧‧ side cover

14‧‧‧First bearing

2‧‧‧Motor drive shaft

21‧‧‧Inner shaft hole

22‧‧‧First bearing housing

221‧‧‧Inner hole

222‧‧‧ screw holes

223‧‧‧ counterbore screws

224‧‧‧ external thread

23‧‧‧External thread

24, 24'‧‧‧ second bearing

3‧‧‧ Stator

4‧‧‧Rotor

5‧‧‧Crank drive shaft

51‧‧‧ crank joint

52‧‧‧Second bearing

521‧‧‧Neutral hole

522‧‧‧ external thread

53‧‧‧External thread

54, 54'‧‧‧ buckle

6‧‧‧First unidirectional ratchet

6’‧‧‧Second one-way ratchet

7‧‧‧Active sprocket

71‧‧‧Fixed components

8‧‧‧ pedal crank

Claims (10)

A foot motor power mechanism for mounting on a bicycle includes: a motor casing for fixing to the bicycle frame, the motor casing is a closed hollow casing, and an opposite shaft is respectively provided with an axle a motor drive shaft rotatably disposed between the shaft holes on both sides of the motor casing, wherein the motor drive shaft is provided with an inner shaft hole communicating with both ends; a stator coupled to the motor casing, and a joint The motor drives a rotor of the shaft, the stator corresponding to the rotor to drive the rotor to rotate with the motor drive shaft; a crank drive shaft rotatably disposed in an inner shaft hole of the motor drive shaft, the crank drive shaft ends Projecting two ends of the motor drive shaft respectively; a first one-way ratchet coupled to one end of the motor drive shaft, the first one-way ratchet is axially driven by the motor; a first end coupled to one end of the crank drive shaft a two-way ratchet, the second one-way ratchet is driven by the crank to drive the front drive; and a first unidirectional ratchet coupled between the first one-way ratchet and the second one-way ratchet With the second one-way Respectively drive the drive sprocket wheel, the drive sprocket to drive the rear wheel of the bicycle. The foot motor power mechanism of claim 1, wherein the motor casing comprises an annular main casing, and a side cover coupled to both sides of the main casing; the side cover is respectively provided with the shaft hole, The shaft hole is provided with a first bearing, and the motor drive shaft is inserted through the first bearing. The pedal motor power mechanism of claim 1, wherein the first one-way ratchet and the second one-way ratchet are single-toothed flywheels having a sprocket, the driving sprocket combining a fixing component, the fixing component is stuck On the single tooth The chain teeth of the flywheel. The foot motor power mechanism of claim 1 or 3, wherein one end of the motor drive shaft is coupled to a first bearing seat, the first bearing seat is coupled to the first one-way ratchet, and the crank drive shaft is coupled with one end a second bearing seat, the second bearing seat is coupled to the second one-way ratchet. The foot motor power mechanism of claim 4, wherein a second bearing is disposed in the first bearing seat at one end of the motor drive shaft, and the side cover of the other end of the motor drive shaft is provided with a second bearing. A crank drive shaft passes through the second bearing. The foot motor power mechanism of claim 4, wherein one end of the motor drive shaft is provided with an external threaded portion, the first bearing seat is provided with an inner screw hole screwed to the external thread portion; and one end of the crank drive shaft An external threaded portion is disposed, and the second bearing seat is provided with an inner screw hole screwed to the external thread portion. The pedal motor power mechanism of claim 4, wherein the first bearing housing and the outer periphery of the second bearing housing are respectively provided with external threads screwed to the first one-way ratchet and the second one-way ratchet. And abutting against the flanges of the first one-way ratchet and the second one-way ratchet end, respectively. The pedal motor power mechanism of claim 4, wherein the crank drive shaft is respectively provided with a buckle that abuts the first bearing housing and the second bearing housing. The pedal motor power mechanism of claim 1, wherein the crank drive shafts are respectively provided with a crank joint portion, and each of the crank joint portions is combined with a pedal crank. An electric bicycle according to any one of claims 1 to 9, comprising: the motor casing horizontally coupled to a joint portion of a bicycle frame, the joint portion being the rear of the frame a junction of the lower fork, the riser and the lower tube, such that the two ends of the crank drive shaft are located on both sides of the bicycle; and the drive sprocket is wound around a chain, and the chain is wound around a rear one-way flywheel of the bicycle group.