KR20160018307A - Driving unit of eletricity bike - Google Patents

Driving unit of eletricity bike Download PDF

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Publication number
KR20160018307A
KR20160018307A KR1020140142584A KR20140142584A KR20160018307A KR 20160018307 A KR20160018307 A KR 20160018307A KR 1020140142584 A KR1020140142584 A KR 1020140142584A KR 20140142584 A KR20140142584 A KR 20140142584A KR 20160018307 A KR20160018307 A KR 20160018307A
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KR
South Korea
Prior art keywords
gear
driven gear
shaft
drive gear
drive
Prior art date
Application number
KR1020140142584A
Other languages
Korean (ko)
Inventor
오명근
김세주
윤태호
Original Assignee
삼성전기주식회사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 삼성전기주식회사 filed Critical 삼성전기주식회사
Priority to EP15157686.5A priority Critical patent/EP2982592A1/en
Publication of KR20160018307A publication Critical patent/KR20160018307A/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62M—RIDER PROPULSION OF WHEELED VEHICLES OR SLEDGES; POWERED PROPULSION OF SLEDGES OR SINGLE-TRACK CYCLES; TRANSMISSIONS SPECIALLY ADAPTED FOR SUCH VEHICLES
    • B62M11/00—Transmissions characterised by the use of interengaging toothed wheels or frictionally-engaging wheels
    • B62M11/04—Transmissions characterised by the use of interengaging toothed wheels or frictionally-engaging wheels of changeable ratio
    • B62M11/06—Transmissions characterised by the use of interengaging toothed wheels or frictionally-engaging wheels of changeable ratio with spur gear wheels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62M—RIDER PROPULSION OF WHEELED VEHICLES OR SLEDGES; POWERED PROPULSION OF SLEDGES OR SINGLE-TRACK CYCLES; TRANSMISSIONS SPECIALLY ADAPTED FOR SUCH VEHICLES
    • B62M6/00—Rider propulsion of wheeled vehicles with additional source of power, e.g. combustion engine or electric motor
    • B62M6/40—Rider propelled cycles with auxiliary electric motor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62K—CYCLES; CYCLE FRAMES; CYCLE STEERING DEVICES; RIDER-OPERATED TERMINAL CONTROLS SPECIALLY ADAPTED FOR CYCLES; CYCLE AXLE SUSPENSIONS; CYCLE SIDE-CARS, FORECARS, OR THE LIKE
    • B62K2204/00—Adaptations for driving cycles by electric motor

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Gear Transmission (AREA)

Abstract

The present invention relates to a power transfer device for an electric bike. The power transfer device for an electric bike comprises: a first driven gear which receives power from the rotary shaft of a drive motor; a first drive gear which is engaged with the first driven gear to receive power; a second driven gear which is installed in a first gear shaft (131) where the first drive gear is installed; a second drive gear which is engaged with the second driven gear to receive power; a third driven gear which is installed in a second gear shaft where a second wheel gear is installed; a third drive gear which is engaged with the third driven gear to receive power and is installed in a pedal shaft; and a ratchet guide and an additional bearing which minimize a torsional load applied to a ratchet formed between the third drive gear and the pedal shaft.

Description

[0001] DRIVING UNIT OF ELETRICITY BIKE [0002]

The present invention relates to a power transmission device for an electric bicycle.

The bicycle is structured such that the front wheel, which is a steering wheel, and the rear wheel, which is a drive wheel, are arranged straight in front of and behind the frame, and the occupant moves forward by stepping on a pedal interlocked with the rear wheel to rotate the rear wheel. These bicycles are equipped with power transmission devices such as chains or gears that transmit the power generated by the pedals to the rear wheels.

With this configuration, when the occupant presses the pedal, the drive sprocket integrally formed with the pedal rotates, and at the same time, the rear wheel connected to the driven sprocket by the chain also rotates, thereby advancing the bicycle forward.

Such a bicycle travels by using the power of pedaling by a user, and there is no difficulty in traveling on a flat ground, but a lot of power is required when climbing a slope such as a hill.

In order to solve this problem, recently, an electric bicycle equipped with a motor for driving by using the driving force of the motor in addition to the power of the user has been developed. A motor driven by a battery is used for the electric bicycle, It is possible to select to run only with the force of stepping on the pedal, with the force of the motor driven by the battery, or both.

Korea Patent Publication No. 2012-0132593

An object of the present invention is to minimize a torsional load applied to a ratchet which is provided to transmit a force in a configuration of a power transmission device of an electric bicycle in only one direction.

A power transmission device for an electric bicycle according to an embodiment of the present invention includes a first driven gear that receives power from a rotation shaft of a drive motor, a first drive gear that is engaged with the first driven gear and receives power, A second driven gear mounted on a first gear shaft 131 on which the first drive gear is mounted, a second drive gear meshed with the second driven gear and receiving power, A third driven gear mounted on the gear shaft, and a third drive gear engaged with the third driven gear to receive power and mounted on the pedal shaft, wherein the third drive gear is provided between the third drive gear and the pedal shaft, And a ratchet guide and an additional bearing for minimizing the torsional load applied to the crankshaft.

The present invention minimizes the torsional load applied to the ratchet which is provided to transmit the force only in one direction in the configuration of the power transmission device of the electric bicycle, thereby improving durability and reliability of the ratchet.

1 is an exemplary view showing an electric bicycle in which a power transmission device of an electric bicycle according to an embodiment of the present invention is used,
2 is a perspective view showing a case in which a power transmission device of an electric bicycle according to an embodiment of the present invention is accommodated,
3 is a front perspective view showing a power transmission apparatus for an electric bicycle according to an embodiment of the present invention,
4 is a rear perspective view of a power transmission apparatus for an electric bicycle according to an embodiment of the present invention,
5 is an exploded perspective view showing a structure in which a one-way clutch is mounted in a power transmission apparatus for an electric bicycle according to an embodiment of the present invention,
6 is a perspective view showing a structure in which a ratchet is mounted in a power transmission device of an electric bicycle according to an embodiment of the present invention,
7 is a perspective view of a ratchet in a power transmission apparatus for an electric bicycle according to an embodiment of the present invention,
8 is a cross-sectional view taken along line A-A 'in Fig.

BRIEF DESCRIPTION OF THE DRAWINGS The objectives, specific advantages and novel features of the present invention will become more apparent from the following detailed description taken in conjunction with the accompanying drawings, in which: FIG. It should be noted that, in the present specification, the reference numerals are added to the constituent elements of the drawings, and the same constituent elements have the same numerical numbers as much as possible even if they are displayed on different drawings. It will be further understood that terms such as " first, "" second," " one side, "" other," and the like are used to distinguish one element from another, no.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In the following description of the present invention, detailed description of related arts which may unnecessarily obscure the gist of the present invention will be omitted.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is an exemplary view showing an electric bicycle in which a power transmission device of an electric bicycle according to an embodiment of the present invention is used. FIG. 2 is a perspective view illustrating a case in which a power transmission device of an electric bicycle according to an embodiment of the present invention is accommodated. 3 is a front perspective view showing a power transmitting apparatus of an electric bicycle according to an embodiment of the present invention.

1, the electric bicycle 10 includes a chain (not shown) which is supported by a frame 11 of a front wheel 16 and a rear wheel 17 and is rotated by power of the pedal 14 or power transmission of the driving motor 12. [ (15) is engaged with the rear wheel (17). At this time, the power transmitting means may be composed of the pedal 14 and the driving motor 12. At this time, the pedal 14 transmits rotational force to the chain 15 when the pedal 14 is rotated by the user. The driving motor 12 is connected to the power supply unit, and when the power is supplied, the rotating shaft 12a of the driving motor 12 is rotated, and the rotating force can be transmitted to the chain 15. At this time, when the force is applied to the pedal 14 by the user, the driving motor 12 assists when the electric bicycle 10 is driven, and thus, even if the user applies a small force to the pedal 14, .

2, a power transmission apparatus 100 of an electric bicycle according to an embodiment of the present invention includes a case (not shown) that houses a receiving space therein and accommodates and protects some or all of the components of the power transmitting apparatus 100 100). The power transmitting apparatus 100 provided inside the case 100 will be described below with reference to Figs. 3 to 8. Fig.

FIG. 3 is a front perspective view showing a power transmitting apparatus of an electric bicycle according to an embodiment of the present invention, and FIG. 4 is a rear perspective view illustrating a power transmitting apparatus of an electric bicycle according to an embodiment of the present invention.

3 and 4, a power transmission apparatus 100 of an electric bicycle according to an embodiment of the present invention includes a first driven gear 120, a first drive gear 130, a second driven gear 140, a second drive gear 160, a third driven gear 170, and a third drive gear 180. In addition, the power transmission apparatus 100 of the electric bicycle according to an embodiment of the present invention may further include a first power transmission means and a second power transmission means.

The first driven gear 120 receives power from the rotating shaft 12a of the drive motor 12. [ Here, the first driven gear 120 is mounted on the rotating shaft 12a and rotated together with the rotating shaft 12a. At this time, the first driven gear 120 may be coupled to the end of the rotary shaft 12a.

Further, the first driven gear 120 may be formed of, for example, a pinion.

On the other hand, a rotary shaft bearing 12b is mounted on the rotary shaft 12a to support the rotary shaft 12a. Here, for example, the outer circumferential surface of the rotary shaft bearing 12b may be fixed to the case, and the inner circumferential surface thereof may be mounted on the rotary shaft 12a.

The first driving gear 130 is meshed with the first driven gear 120 and receives power. For example, the first driven gear 120 and the first drive gear 130 may be gear-coupled by a helical gear or a spur gear.

Here, the first driving gear 130 is provided at one side of the first gear shaft 131 and is rotated according to the rotation of the first driven gear 120. Also, the first driving gear 130 may be a wheel gear.

The second driven gear 140 is mounted on the first gear shaft 131 on which the first drive gear 130 is mounted and is rotated together with the first gear shaft 131. Here, the second driven gear 140 is provided on the other side of the first gear shaft 131, and is rotated together with the first drive gear 130 as it rotates to receive the power.

In addition, the second driven gear 140 may be formed of, for example, a pinion.

The second drive gear 160 is meshed with the second driven gear 140 and receives power. For example, the second driven gear 140 and the second driven gear 120 may be gear-coupled by a helical gear or a spur gear.

Here, the second driving gear 160 is positioned at one side of the second gear shaft 161 and rotated according to the rotation of the second driven gear 140. The second driving gear 160 may be a wheel gear.

The third driven gear 170 is mounted on the second gear shaft 161 on which the second drive gear 160 is mounted and rotated together with the second gear shaft 161. Here, the third driven gear 170 is provided on the other side of the second gear shaft 161, and is rotated together with the second drive gear 160 as it rotates to receive the power.

Further, the third driven gear 170 may be made of, for example, a pinion.

The third drive gear 180 is meshed with the third driven gear 170 and receives power. For example, the third driven gear 170 and the third drive gear 180 may be gear-coupled by a helical gear or a spur gear.

Here, the third drive gear 180 is mounted on the pedal shaft 13 and rotated according to the rotation of the third driven gear 170. Also, the third drive gear 180 may be a wheel gear.

On the other hand, the pedal shaft 13 is provided with a pedal shaft bearing 13b to support the pedal shaft 13. Here, for example, the outer peripheral surface of the pedal shaft bearing 13b is fixed to the case, and the inner peripheral surface of the pedal shaft bearing 13b can be mounted on the pedal shaft 13.

The first driven gear 120 and the first drive gear 130 may be in the form of helical gears and may be engaged with each other. The first driven gear 120 may be formed to be smaller than the first drive gear 130. At this time, the first driven gear 120 may be formed to have a gear ratio 1/2 or less of the first drive gear 130, but in the power transmission apparatus of the electric bicycle according to the embodiment of the present invention, 120 and the first drive gear 130 are not necessarily limited thereto.

On the other hand, the second driven gear 140 and the second drive gear 160 may be in the form of, for example, helical gears and intermeshed. Further, the second driven gear 140 may be formed smaller than the second drive gear 160. [ At this time, the second driven gear 140 may be formed to have a gear ratio of 1/2 or less than the second drive gear 160. However, in the power transmitting apparatus of the electric bicycle according to the embodiment of the present invention, 140 and the second drive gear 160 are not necessarily limited thereto.

Meanwhile, the third driven gear 170 and the third drive gear 180 may be meshed with each other, for example, in the form of a spur gear. Further, the third driven gear 170 may be formed smaller than the third drive gear 180. [ In this case, the third driven gear 170 may be formed to have a gear ratio of 1/2 or less of the second drive gear 160. However, in the power transmission apparatus of the electric bicycle according to the embodiment of the present invention, 170 and the third drive gear 180 are not necessarily limited thereto.

5 is an exploded perspective view illustrating a structure in which a one-way clutch is mounted in a power transmission apparatus of an electric bicycle according to an embodiment of the present invention.

5, the first power transmission means is provided between the first drive gear 130 and the first gear shaft 131, and transmits the power only in one direction.

Here, the first power transmission means includes a one-way clutch 140, and can transmit power only from the first drive gear 130 to the first gear shaft 131. At this time, the one direction may be the direction opposite to the rotation direction of the rotation shaft 12a of the driving motor 12. [ The one direction may be, for example, counterclockwise, but one direction is not necessarily limited to the counterclockwise direction in the power transmission apparatus 100 of the electric bicycle according to the embodiment of the present invention.

Meanwhile, the one-way clutch 150 may be formed of a cylindrical clutch, for example.

Here, the technique of transmitting the power in one direction through the one-way clutch 150 is a known technique, and a detailed description thereof will be omitted.

FIG. 6 is a perspective view showing a ratchet mounted structure of a power transmission apparatus for an electric bicycle according to an embodiment of the present invention. FIG. 7 is a perspective view showing a ratchet in a power transmission apparatus of an electric bicycle according to an embodiment of the present invention. And Fig. 8 is a cross-sectional view taken along line A-A 'in Fig.

6 to 8, the second power transmission means is provided between the third drive gear 180 and the pedal shaft 13 to transmit the power only in one direction.

The second power transmitting means includes a ratchet 190 so that power is transmitted only to the pedal shaft 13 from the third driving gear 180. The ratchet 190 is connected to the third driving gear 180, The rotational force of the third driving gear 180 is transmitted to the pedal shaft 13 and the rotational force of the pedal shaft 13 is transmitted to the third driving gear 180 Do not. That is, the ratchet 190 transmits power during one-direction rotation, and no power is transmitted to the ratchet 190 when it rotates in the other direction. The ratchet 190 rotates the chain 15 by the rotation of the pedal shaft 13 by a pressing force generated when the user steps on the pedal 14 and rotates the chain 15 by rotating the pedal shaft 13 in the direction of rotating the front wheel 16 and the rear wheel 17 (See FIG. 1).

The ratchet 190 includes a support member 191 having a protrusion formed on the inner circumferential surface thereof, a spring 192 disposed between the inner circumferential surface of the support member 191 and a protrusion formed on the outer circumferential surface of the ratchet 190, (pawl) 193.

Meanwhile, the present invention may further include a support member for reducing the torsional load applied to the ratchet 190. The support members are provided on both sides of the ratchet 190 so that the torsional load is not directly transmitted to the ratchet 190. The support member may include at least one of a holder 200, a first bearing 210, and a second bearing 220 described below.

A holder 200 for supporting the ratchet 190 may be provided between the ratchet 190 and the third driving gear 180. One end of the holder 200 may protrude to the outside of the third driving gear 180 along the pedal shaft 130 while enclosing the ratchet 190. A first bearing 210 may be provided on the outer side of the holder 200 protruded outwardly and a second bearing 220 may be provided between the pedal shaft 130 and the inside of the holder 200 protruding outwardly. May be provided.

The holder 200 may further include a third bearing 230 between the pedal shaft 130 and the other end of the one end of the holder 200. In this case, the other end of the holder 200 may be positioned between the third drive gear 180 and the pedal shaft 130. The third bearing 230 may be provided between the ratchet guide 240 and the pedal shaft 130. The third bearing 230 may be provided at the other end of the holder 200. In this case, .

The power transmission device 100 of the electric bicycle according to the embodiment of the present invention has a three-stage decelerating structure and can be miniaturized and lightweight. In addition, since the holder 200, Since the bearings (first, second and third bearings) are provided at both ends of the power transmission device 100, the support force of the holder is improved and at the same time, the power transmission device 100, such as the holder 200, the ratchet 190 and the case 110, It is possible to extend the service life by reducing the torsional load which can be applied.

While the present invention has been described in detail with reference to the specific embodiments thereof, it is to be understood that the present invention is not limited thereto, and that the power transmission apparatus for an electric bicycle according to the present invention is not limited thereto. It will be apparent that modifications and improvements can be made by those skilled in the art.

Further, it is intended that the present invention cover the modifications and variations of this invention provided they come within the scope of the appended claims and their equivalents.

10: Electric bicycle
11: Frame
12: Driving motor
12a:
12b: rotating shaft bearing
13: Pedal shaft
13b: Pedal shaft bearing
14: Pedal
15: Chain
16: front wheel
17: rear wheel
100: Power transmission device
110: Case
120: First driven gear
130: first drive gear
131: 1st gear shaft
140: clutch
150: 2nd driven gear
160: second drive gear
161: Second gear shaft
170: 3rd driven gear
180: Third drive gear
190: Ratchet
191: Support member
192: spring
193: Pawl
200: Holder
210: first bearing
220: second bearing
230: third bearing
240: Ratchet guide

Claims (16)

A first driven gear that receives power from the rotation shaft of the drive motor;
A first driving gear engaged with the first driven gear and receiving power;
A second driven gear mounted on a first gear shaft 131 on which the first drive gear is mounted;
A second drive gear engaged with the second driven gear to receive power;
A third driven gear mounted on a second gear shaft on which the second wheel gear is mounted;
A third drive gear engaged with the third driven gear to receive power and mounted on the pedal shaft;
A ratchet provided between the third driving gear and the pedal shaft; And
And a support member for reducing a torsional load applied to the ratchet.
The method according to claim 1,
And the support member includes a holder provided between the third drive gear and the ratchet.
3. The method of claim 2,
Wherein the support member includes a pair of bearings provided on both sides of the ratchet between the pedal shaft and the holder.
The method of claim 3,
Wherein the support member includes a ratchet guide for transmitting a force between the holder and any one of the pair of bearings between the holder and the bearing.
The method according to claim 1,
Further comprising first power transmission means provided between the first drive gear and the first gear shaft for transmitting power only from the first drive gear to the first gear shaft.
6. The method of claim 5,
Wherein the first power transmitting means comprises a one-way clutch.
The method according to claim 1,
And the ratchet transmits power only to the pedal shaft from the third drive gear.
The method according to claim 1,
Wherein the first drive gear, the second drive gear, and the third drive gear are wheel gears.
The method according to claim 1,
Wherein the first driven gear, the second driven gear, and the third driven gear are made of a pinion.
The method according to claim 1,
And the first driven gear is mounted on the rotating shaft and rotated together with the rotating shaft.
The method according to claim 1,
Wherein the first drive gear is mounted on one side of the first gear shaft and the second driven gear is mounted on the other side of the first gear shaft and the first drive gear and the second driven gear are connected to the first gear shaft Power transmission of an electric bicycle rotated together.
The method according to claim 1,
The second drive gear is mounted on one side of the second gear shaft, the third driven gear is mounted on the other side of the second gear shaft, and the second drive gear and the third driven gear are connected to the second gear shaft Power transmission of an electric bicycle rotated together.
The method according to claim 1,
Wherein the first driven gear and the first drive gear are helical gears.
The method according to claim 1,
And the third driven gear and the third driven gear are formed by spur gears.
The method according to claim 1,
Wherein the first driven gear, the second driven gear, and the third driven gear are smaller than the first drive gear, the second drive gear, and the third drive gear, respectively.
The method according to claim 1,
Wherein the first driven gear, the second driven gear, and the third driven gear are driven by a power of an electric bicycle having a gear ratio of 1/2 or less of the first drive gear, the second drive gear, Delivery device.
KR1020140142584A 2014-08-08 2014-10-21 Driving unit of eletricity bike KR20160018307A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP15157686.5A EP2982592A1 (en) 2014-08-08 2015-03-05 Powertrain device for electric bicycle

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1020140102559 2014-08-08
KR20140102559 2014-08-08

Publications (1)

Publication Number Publication Date
KR20160018307A true KR20160018307A (en) 2016-02-17

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Application Number Title Priority Date Filing Date
KR1020140142584A KR20160018307A (en) 2014-08-08 2014-10-21 Driving unit of eletricity bike

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KR (1) KR20160018307A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20190138848A (en) * 2017-05-22 2019-12-16 블라디미르 그리고레비치 곤차로브 Motorized bicycle transmission
CN115476956A (en) * 2020-06-30 2022-12-16 株式会社岛野 Bicycle derailleur, bicycle gear structure, bicycle motor unit and front derailleur

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20120132593A (en) 2011-05-26 2012-12-06 금오공과대학교 산학협력단 Electric bicycle using of solar cell

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20120132593A (en) 2011-05-26 2012-12-06 금오공과대학교 산학협력단 Electric bicycle using of solar cell

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20190138848A (en) * 2017-05-22 2019-12-16 블라디미르 그리고레비치 곤차로브 Motorized bicycle transmission
CN115476956A (en) * 2020-06-30 2022-12-16 株式会社岛野 Bicycle derailleur, bicycle gear structure, bicycle motor unit and front derailleur

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