KR101763929B1 - Electric bicycle - Google Patents

Electric bicycle Download PDF

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Publication number
KR101763929B1
KR101763929B1 KR1020150136221A KR20150136221A KR101763929B1 KR 101763929 B1 KR101763929 B1 KR 101763929B1 KR 1020150136221 A KR1020150136221 A KR 1020150136221A KR 20150136221 A KR20150136221 A KR 20150136221A KR 101763929 B1 KR101763929 B1 KR 101763929B1
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KR
South Korea
Prior art keywords
bicycle
wheel
rear wheel
pedal
motor
Prior art date
Application number
KR1020150136221A
Other languages
Korean (ko)
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KR20170037101A (en
Inventor
송진황
Original Assignee
송진황
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Priority to KR1020150136221A priority Critical patent/KR101763929B1/en
Publication of KR20170037101A publication Critical patent/KR20170037101A/en
Application granted granted Critical
Publication of KR101763929B1 publication Critical patent/KR101763929B1/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
    • 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
    • B62M—RIDER PROPULSION OF WHEELED VEHICLES OR SLEDGES; POWERED PROPULSION OF SLEDGES OR SINGLE-TRACK CYCLES; TRANSMISSIONS SPECIALLY ADAPTED FOR SUCH VEHICLES
    • B62M23/00—Transmissions characterised by use of other elements; Other transmissions
    • B62M23/02—Transmissions characterised by use of other elements; Other transmissions characterised by the use of two or more dissimilar sources of power, e.g. transmissions for hybrid motorcycles
    • 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
    • B62M3/00—Construction of cranks operated by hand or foot
    • 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
    • B62M3/00—Construction of cranks operated by hand or foot
    • B62M3/08—Pedals
    • 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
    • B62M6/60—Rider propelled cycles with auxiliary electric motor power-driven at axle parts
    • B62M6/65—Rider propelled cycles with auxiliary electric motor power-driven at axle parts with axle and driving shaft arranged coaxially
    • 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
    • B62M6/80—Accessories, e.g. power sources; Arrangements thereof
    • 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
    • B62M9/00—Transmissions characterised by use of an endless chain, belt, or the like
    • B62M9/04—Transmissions characterised by use of an endless chain, belt, or the like of changeable ratio
    • B62M9/06—Transmissions characterised by use of an endless chain, belt, or the like of changeable ratio using a single chain, belt, or the like
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H7/00—Gearings for conveying rotary motion by endless flexible members
    • F16H7/06—Gearings for conveying rotary motion by endless flexible members with chains

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Transportation (AREA)
  • General Engineering & Computer Science (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)

Abstract

The present invention relates to an electric bicycle, and an electric bicycle according to the present invention comprises a pedal shaft, a driving sprocket provided around the pedal shaft, a multi-stage hub sprocket coupled with the rear wheel, 1. A bicycle comprising a main chain, the bicycle comprising: a hub motor which is installed in a rear wheel of a bicycle so as to be rotatable about a fixed rear wheel axis of the bicycle; A gear connecting portion having one end coupled integrally with the hub motor and the other end extending to the opposite side of the side where the multi-stage hub sprocket is positioned so as to be located outside the rear wheel of the bicycle; A motor gear integrally coupled to a periphery of a portion of the gear connection portion that protrudes to the opposite side of a side where the multi-stage hub sprocket is positioned so as to be located outside the rear wheel of the bicycle; A rear wheel coupling part installed around the hub motor so as to be rotatable with respect to the hub motor and coupled with a spoke of a rear wheel of the bicycle and integrally rotated with the rear wheel of the bicycle; An auxiliary gear provided around the bicycle pedal shaft so as to face the motor gear in front and back; And an auxiliary chain connecting the motor gear and the auxiliary gear.

Description

Electric bicycle {ELECTRIC BICYCLE}

More particularly, the present invention relates to an electric bicycle, and more particularly, to an electric bicycle, which can be operated by using either a driving force of a motor or a pressing force of a pedal, The present invention relates to an electric bicycle capable of improving the convenience of the user's operation by preventing the pedal from rotating.

A typical electric bicycle uses a hub motor, also referred to as an in-wheel motor, to drive the rear wheel of the bicycle.

In the case of an electric bicycle using a hub motor, the hub motor is mounted inside the rear wheel, and the hub motor is coupled with the rear wheel so that the rear wheel is rotated by the rotational force of the hub motor.

However, since the driving force of the hub motor itself is transmitted directly to the rear wheel without going through the multi-speed transmission gear, the electric bicycle using the hub motor is excessively loaded when the uphill road is climbed, There is a problem that discharge can be easily performed.

In order to solve such a problem, a motor is fixed to a frame around a driving sprocket without installing a motor inside a rear wheel, and a driving force of the motor is provided between a driving sprocket and a rear wheel sprocket by connecting a motor and a driving sprocket by a chain An electric bicycle configured to be supplied to a rear wheel through a conventional multi-speed transmission gear of a bicycle has been developed, for example, Korean Patent Laid-Open Publication No. 10-2011-0043432.

However, the electric bicycle having the motor attached to the frame and the motor chain attached to the frame has a complicated and dirty appearance of the electric bicycle as compared with the electric bicycle equipped with the hub motor having a clean appearance, , Batteries, etc., are installed in the vicinity of the power transmitting device of the bicycle which is not spatially free, so that the motor and the motor chain are additionally installed.

SUMMARY OF THE INVENTION The present invention has been conceived to solve the problems of the related art, and it is an object of the present invention to provide a hybrid vehicle in which a hub motor is mounted inside a rear wheel, and a driving force of a hub motor is transmitted to a rear wheel through a multi- Discharge and the like, and can be operated by using either the driving force of the motor or the pressing force of the pedal, or the combined force of two forces when necessary. When the motor is driven only, the pedal does not rotate, And it is an object of the present invention to provide an electric bicycle capable of improving convenience in operation.

According to another aspect of the present invention, there is provided an electric bicycle comprising: a pedal shaft; a driving sprocket disposed around the pedal shaft; a multi-stage hub sprocket coupled to the rear wheel; 1. A bicycle comprising a main chain, the bicycle comprising: a hub motor which is installed in a rear wheel of a bicycle so as to be rotatable about a fixed rear wheel axis of the bicycle; A gear connecting portion having one end coupled integrally with the hub motor and the other end extending to the opposite side of the side where the multi-stage hub sprocket is positioned so as to be located outside the rear wheel of the bicycle; A motor gear integrally coupled to a periphery of a portion of the gear connection portion that protrudes to the opposite side of a side where the multi-stage hub sprocket is positioned so as to be located outside the rear wheel of the bicycle; A rear wheel coupling part installed around the hub motor so as to be rotatable with respect to the hub motor and coupled with a spoke of a rear wheel of the bicycle and integrally rotated with the rear wheel of the bicycle; An auxiliary gear provided around the bicycle pedal shaft so as to face the motor gear in front and back; And an auxiliary chain connecting the motor gear and the auxiliary gear.

The pedal shaft may include an outer shaft having a hollow formed therein and coupled with the driving sprocket; An inner shaft through which the hollow passes and which is rotatably installed in the hollow and to which a pedal arm is connected at both ends; Wherein the outer ring and the inner ring are mutually locked with respect to the forward rotation of the outer ring, and the inner ring is engaged with the outer ring, A motor connection one-way clutch in which the lock is released for forward rotation of the motor; And an inner wheel coupled to the inner shaft, and an outer wheel coupled to the drive sprocket and rotatable relative to the inner wheel, wherein the outer wheel and the inner wheel are mutually locked with respect to the forward rotation of the inner wheel, And a pedal connection one-way clutch in which the lock of the forward rotation of the outer wheel is released.

A pedal one-way clutch including an inner wheel coupled to the pedal shaft and an outer wheel coupled to the pedal arm and rotatable relative to the inner wheel is coupled to the left and right ends of the pedal shaft, And the pedal one-way clutch may be configured such that the outer wheel and the inner wheel are mutually locked with respect to the forward rotation of the outer wheel and the lock is released with respect to the forward rotation of the inner wheel.

In addition, a detent, which is elastically supported by a detent spring and is movable in and out, is coupled to an edge of the inner wheel, a detent engagement groove is provided on an inner circumferential surface of the outer wheel so that the detent can be inserted, Wherein the detent and the detent engagement groove are in contact with the detent engagement groove of the detent when the inner wheel rotates in the forward direction with respect to the outer wheel so that the detent is released from the detent engagement groove And when the outer wheel rotates in the normal direction with respect to the inner wheel, the detent projected by the detent spring is engaged with the detent engagement groove.

In addition, the inner wheel is provided with an insertion groove formed therein, and a retaining pin elastically supported by a retaining pin spring so that one end of the retaining pin can be inserted into or removed from the insertion groove, The inner circumferential surface of the insertion groove and a portion of the engaging pin inserted into the insertion groove are rounded so that when the inner wheel and the outer wheel are integrally rotated, the engaging pin is inserted into the insertion groove The engagement pin is inserted into the insertion groove by the pushing force of the engagement pin spring only when the engagement pin is in contact with the insertion groove, and when the insertion groove continues to move, And the engaging pin is pushed out of the insertion groove by pushing the inclined surface of the insertion groove desirable.

In addition, when the pedal arm is extended vertically downward, a hook is provided at a lower end of the latch pin, and when the hook is engaged with the hook at the upper side, the hook is prevented from returning upward And a pedal arm provided at a lower end thereof with a switch portion protruding outwardly of the pedal arm so as to be hinged within the pedal arm and to apply a pushing force to the pedal arm, A fixing spring for maintaining the engaged state of the engaging protrusion is provided in the pedal arm, and when the upper end of the hook protrudes from the insertion groove and moves downward, the noise removing fixture comes into contact with the hook, Then, while returning by the fixing spring, The latching pin is prevented from rotating upward so that the latching pin continues to come out of the insertion groove. When the user pushes the switch part inward, the noise removing fixing part is rotated while the hooking part and the latching protrusion It is preferable that the engagement pin is lifted upward while the engagement of the engagement pin is released.

Further, it is preferable that the drive sprocket is a multi-stage gear.

As described above, the electric bicycle according to the present invention is equipped with a hub motor in its inside, so that the driving force of the hub motor is transmitted to the rear wheel through the multi-speed transmission gear, It is possible to solve problems such as motor overheating and battery discharge due to rapid battery consumption and can be operated by using either the driving force of the motor and the pressing force of the pedal or the combined force of two forces And it is an object of the present invention to provide an electric bicycle in which the pedal does not rotate when only the motor is driven, thereby improving the convenience of the user's operation.

1 is a plan sectional view showing an electric bicycle according to the present invention.
Fig. 2 is an exploded perspective view showing a part of an electric bicycle according to the first embodiment of the present invention; Fig.
3 is an exploded perspective view showing a part of an electric bicycle according to a first embodiment of the present invention.
4 is a perspective view showing a part of an electric bicycle according to the first embodiment of the present invention;
5 is a side sectional view showing a part of an electric bicycle according to a second embodiment of the present invention.

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

1 is a plan sectional view showing an electric bicycle according to an embodiment of the present invention.

The electric bicycle according to the embodiment of the present invention includes a pedal shaft 500, a pedal arm 510, a pedal 520, a drive sprocket 50, a multi-stage hub sprocket 60, a main chain 70, A hub motor 100, a gear connecting portion 110, a motor gear 111, a rear wheel connecting portion 120, an auxiliary gear 140, and an auxiliary chain 150.

The left pedal arm 510 with the left pedal 520 and the right pedal arm 510 with the right pedal 520 are rotatably coupled to the left and right ends of the pedal shaft 500, And the multistage hub sprocket 60 as a seventh gear is rotatably engaged around the rear wheel shaft 81. The main chain 70 is coupled to the driving sprocket 50, And a multi-stage hub sprocket 60. This configuration is common to that of a conventional conventional bicycle.

1, a hub motor 100 is installed inside the rear wheel 80 and is pierced by a rear wheel shaft 81,

The difference between the electric bicycle in which the hub motor 100 is installed in the conventional rear wheel 80 and the electric bicycle according to the present invention is that in the case of an electric bicycle in which the hub motor 100 is installed inside the rear wheel 80, The hub motor 100 is coupled with the spool of the rear wheel 80 so that the hub motor 100 is rotated together with the rear wheel 80. The hub motor 100 of the present invention is directly coupled to the rear wheel 80 But is mounted so as to be rotatable about the rear wheel axle 81 while abutting against the bearing 130 provided around the rear wheel axle 81.

That is, the hub motor 100 according to the present invention is not directly coupled to the rear wheel 80 but includes the auxiliary chain 150, the pedal shaft 500, the drive sprocket 50, the main chain 70, the multi-stage hub sprocket 60 The driving force of the hub motor 100 is transmitted to the rear wheel only through the chain and the multi-speed transmission.

The hub motor 100 is connected to a battery coupled to the frame of the electric bicycle by electric wires, and rotates around the rear wheel shaft 81 by the power supply of the battery.

The gear connection portion 110 is a circular pipe type member penetrated by the rear wheel shaft 81. The right end is connected to the left end of the hub motor 100 and the left end is a connecting member located outside the rear wheel of the bicycle.

A motor gear 111 is coupled to the periphery of the left end portion of the gear connection portion 110.

The right rear wheel connecting portion 120 is positioned adjacent to the hub motor 100 on the right side of the hub motor 100 and is connected to the rear wheel shaft 81 through the rear wheel shaft 81 And the left rear wheel connecting portion 120 is disposed on the left side of the hub motor 100 in a position adjacent to the hub motor 100 And is rotatably installed around the gear connecting portion 110 by being supported by a bearing 130 which is inserted through the gear connecting portion 110 and installed around the gear connecting portion 110. [

The rear wheel connecting portion 120 is engaged with the spokes of the rear wheel 80. When the rear wheel 80 rotates and the multi-stage hub sprocket 60 rotates, the rear wheel connecting portion 120 is also rotated integrally with the rear wheel 80 .

The auxiliary gear 140 is provided around the left end of the pedal shaft 80 and the auxiliary chain 150 is extended over the auxiliary gear 140 and the motor gear 111 to rotate the rotational force of the motor gear 111, (140).

When the hub motor 100 rotates independently of the rotation of the rear wheel 80, the gear connection portion 110 and the motor gear 111 rotate integrally and the rotational force of the motor gear 111 is transmitted to the auxiliary chain 150 To the auxiliary gear 140 to rotate the pedal shaft 500.

Therefore, since the entire driving force of the motor is used for driving the rear wheel 80 after passing through the speed change device of the conventional bicycle, the electric bicycle according to the present invention does not overload the motor in the uphill road.

The driving force of the hub motor 100 can rotate the driving sprocket 50 for the purpose of this operation, but the pedal can be driven by the pedal, A configuration that does not rotate together with the arm 510 is necessary. This is because when the pedal arm 510 is rotated by the rotation of the hub motor 100, the bicycle driver can not easily place his or her feet on the pedal 520 and must move the legs according to the speed of the pedal 520, If the pedal 520 is to be released from the pedal 520, the pedal 520 must be lifted, and the pedal 520 may be rotated.

FIG. 2 to FIG. 4 are views showing a pedal shaft portion of the electric bicycle according to the first embodiment of the present invention.

An outer shaft 580 is provided in which a hollow is formed, and the inner shaft 590 penetrates the hollow of the outer shaft 580. The outer shaft 580 is installed to penetrate the crankshaft housing 500 of the bicycle and bearings 58 and 58 'are provided between the crankshaft housing 500 and the outer shaft 580, So as to smoothly rotate inside the shaft housing 500.

A sleeve (not shown) is provided between the outer shaft 580 and the inner shaft 590 to allow the inner shaft 590 to rotate smoothly inside the outer shaft 580.

The outer shaft 580 is provided with projections 582 and 581 around its outer periphery so that the bearings 58 and 58 'fitted to the outer shaft 580 are respectively seated and the bearings 58 and 58' And the fastening members 61 and 61 'are respectively installed on both sides of the fastening members 61 and 61'.

As shown in FIGS. 3 and 4, threaded portions 586 and 586 'are formed on inner surfaces of the penetrating portion 500s of the crankshaft housing 500 on both sides. The outer shaft 580 on which the bearings 58 and 58 'are seated is placed in the protrusions 582 and 581 in the penetration portion 500S of the crankshaft housing 500, The threaded portions 616 and 616 'of the fastening members 61 and 61' on both sides of the portion 500s are engaged with the threaded portions 586 and 586 'on the inner surfaces of both sides of the crankshaft housing 500, (58) and (58 ') so that these bearings (58) and (58') can be stably restored in situ.

As shown in the figure, the inner shaft 590 penetrates through the penetrating portions 61S and 61 'S of the fastening members 61 and 61' and the hollow penetrating portion 580S of the outer shaft 580.

Way clutch 300 is provided with an inner wheel 360 and an outer wheel 330. The inner wheel 360 is mounted on the outer shaft 580 and the outer wheel 330 is mounted on the outer shaft 580. [ The auxiliary gear 339 is coupled to the hub motor 990 to receive the power of the hub motor 990.

The outer ring 330 and the inner ring 360 of the motor connection one-way clutch 300 are mutually locked and rotated together in the forward direction (the rotational direction in which the bicycle advances as the + direction in the drawing) of the outer ring 330, The lock is released with respect to the forward rotation of the inner ring 360 so that the inner ring 360 is idle.

An auxiliary gear 339 is formed on the outer ring 330 of the motor connection one-way clutch 300 and is connected to the motor gear 993 of the hub motor 990 by an auxiliary chain 930.

A threaded portion 368 is formed on the inner surface of the penetrating portion of the inner ring 360 of the motor connection one-way clutch 300 and a corresponding threaded portion 568 is formed on the outer periphery of one end of the outer shaft 580, Way clutch 300 is mounted on the outer shaft 580. The one-

The hub motor 990 and the motor connection one-way clutch 300 are installed on the same side, which are installed on the opposite side of the drive sprocket 50 of the bicycle from the crankshaft housing 500 of the bicycle. The outer shaft 580 is engaged with the drive sprocket 50 of the bicycle.

The outer shaft 580 is coupled to the outer sprocket 580 and the driving sprocket 50 of the bicycle by the outer shaft coupler 18 mounted on the outer shaft 580 coupled to the drive sprocket 50 of the bicycle. In other words, a threaded portion 518 is formed around the outer periphery of the outer shaft 580 on the opposite side to the one side where the motor connection one-way clutch 300 is mounted, and the threaded portion of the inner surface of the penetration portion of the outer shaft coupler 18 is engaged therewith, The outer joint member 18 is coupled to one surface of the drive sprocket 50. Whereby the outer shaft 580 is engaged with the drive sprocket 50.

The outer shaft 580 extends through the crankshaft housing 500 and projects to both sides of the crankshaft housing 500. Screws 568 and 518 are formed on the protruded portions of the outer shaft 580, (18) is mounted.

According to the first embodiment, a pedal connection one-way clutch 200 is also provided. The pedal connection one-way clutch 200 has an outer wheel 230 and an inner wheel 260. The inner wheel 260 is mounted to the inner shaft 590 and the outer wheel 230 is coupled to the drive sprocket 50 .

The outer wheel 230 and the inner wheel 260 of the pedal connection one-way clutch 200 are mutually locked and rotated together with respect to the forward rotation (the rotational direction in which the bicycle advances as the + direction in the figure) of the inner wheel 2630 And the lock is released with respect to the forward rotation of the outer wheel 230 so that the outer wheel 230 is idle.

A threaded portion 598 is formed on the end of the pedal 530 of the inner shaft 590,

A corresponding thread portion 2698 is formed on the inner surface of the penetrating portion of the inner ring 260 of the one-way clutch 200 and these threaded portions 598 and 2698 are engaged so that the pedal connection one-way clutch 200 is engaged with the crankshaft 590 Respectively.

The corresponding threaded portion 388 of the inner surface of the through portion of the pedal coupler 38 is engaged with the threaded portion 238 formed along the outer periphery of the outer wheel 230 of the pedal connection one-way clutch 200, Is coupled to the outer surface of the drive sprocket 50. Accordingly, the outer wheel 230 of the pedal connection one-way clutch 200 is engaged with the drive sprocket 50.

3 and 4, a threaded portion 598 is formed on a protruding portion of an inner shaft 590 protruding outwardly through an outer shaft 580 passing through a crankshaft housing 500, The corresponding thread portion 2698 of the clutch 200 is engaged and the inner wheel 260 of the inner shaft 590 is mounted.

3 and 4 are views showing the structure of an outer shaft 580 and a crank shaft 590 installed in the crankshaft housing 500 according to the first embodiment of the present invention.

The outer shaft 580 passes through the penetrating portion 500S of the crankshaft housing 500 and the inner shaft 590 passes through the penetrating portion 580S of the outer shaft 580 as described above. Bearings 58 and 58 'are provided between the crankshaft housing 500 and the outer shaft 580 and tightening members 61 and 61' are provided to the bearings 58 and 58 '.

As described above, the outer shaft 580 extends through the crankshaft housing 500 and protrudes to both sides of the crankshaft housing 500. Screws 568 and 518 are formed at the protruding portions of the outer shaft 580 and the motor connecting one-way clutch 300, A threaded portion 598 is formed on the protruding portion of the inner shaft 590 protruding through the outer shaft 580 passing through the crankshaft housing 500. The threaded portion 598, The corresponding thread portion 2698 of the coupling one-way clutch 200 is engaged and the inner ring 260 of the inner shaft 590 is mounted.

The inner shaft 590 protrudes through the outer shaft 580 on which the motor connection one-way clutch 300 is mounted and the inner shaft 590 and the motor connection one-way clutch 300 are not in contact with each other.

5 is a view showing a pedal shaft portion of an electric bicycle according to a second embodiment of the present invention.

In the first embodiment, the pedal shaft is composed of the outer shaft 580 and the inner shaft 590, but in the case of the second embodiment, the pedal shaft 500 is formed as a single shaft as the conventional bicycle, And the pedal arm 510 coupled to both ends of the pedal shaft 500 may be provided with a pedal one-way clutch so that the pedal arm 510 may rotate integrally with the pedal shaft 500, The pedal shaft 510 is kept still and only the pedal shaft 500 can be rotated.

The pedal one-way clutch includes an inner wheel 410 coupled to the pedal shaft 500 and an outer wheel 420 coupled to the pedal arm 510 and rotatable with respect to the inner wheel 410, 500 are coupled to a left end and a right end, respectively.

The pedal one-way clutch is configured such that the outer wheel 420 and the inner wheel 410 are mutually immovable against the forward rotation of the outer wheel 420 and the lock is released with respect to the forward rotation of the inner wheel 410. [

5, a detent 430, which is elastically supported by a detent spring 440 and is movable in and out, is hinged to an inner edge of the inner wheel 410, and an inner peripheral surface of the outer wheel 420 A detent engagement groove 421 is provided so that the detent 430 can be inserted and the detent 430 and the detent engagement groove 421 are formed in such a manner that the inner wheel 410 rotates in the forward direction with respect to the outer wheel 420 The detent 430 is brought into contact with the detent engagement groove 421 and enters inward so that the detent 430 is made to come out of the detent engagement groove 421 and the outer wheel 420 The pawl 430 protruded by the detent spring 440 is caught in the detent engagement groove 421 when the pawl 420 rotates in the forward direction.

The detent 430 is lifted by the detent spring 440 which is hinged to only the forward end on the inner wheel 410 and the other is disposed on the lower side. The shape of the detent catching groove 421 is the When the inner wheel 410 rotates in the normal direction, the detent 430 is naturally pressed by the inclined inner surface of the detent engagement groove 421, The detent 430 can be pulled out of the detent engagement groove 421 while when the outer wheel 420 is rotated in the forward direction, the floating end of the detent is moved in the vertical direction of the detent engagement groove 421 So that the detent 430 can not escape from the detent engagement groove 421 and the inner wheel 410 rotates together with the rotation of the outer wheel 420. [ The pedal arm 510 coupled to the outer wheel 420 does not rotate because the outer wheel 420 does not rotate when the inner wheel 410 is rotated in the normal direction by the driving force of the hub motor 100, The inner wheel 410 rotates together with the outer wheel 420 when the outer wheel 420 rotates in the forward direction.

The drive sprocket 50 is engaged with the pedal shaft 500 so that the drive sprocket 50 rotates even if only the hub motor 100 is operated or only the pedal 520 is rotated. When the hub motor 100 is operated only, the pedal arm 510 is kept stationary, so that the user's feet need only be placed on both pedal arms 510 which are downwardly slidable.

The insertion groove 411 and the engagement pin 450 are configured to fix the position of the pedal 520. When the user uses the pedal 520 in a mode of stepping on the pedal 520, So that its position can be kept constant with respect to the housing 500. However, when the motor driving force alone is used, the pedal arm 510 can not be rotated together with the pedal shaft 500, so that the latching pin 450 is configured to be able to escape from the insertion slot 411.

An insertion groove 411 is formed at an edge of the inner wheel 410 and is supported by an engaging pin spring 460 so that one end of the engaging pin 450 can be inserted into or removed from the insertion groove 411. [ Is disposed in the inner space of the outer wheel 420 and the pedal arm 510. The inner circumferential surface of the insertion groove 411 and the portion of the engagement pin 450 inserted into the insertion groove 411 are rounded, When the inner wheel 410 rotates integrally with the outer wheel 420, the retaining pin 450 is retained in the insertion groove 411. When the inner wheel 410 rotates only, The engaging pin 450 is inserted into the insertion groove 411 by the pushing force of the locking pin spring 440 only when the insertion pin 440 faces the insertion groove 411. When the insertion groove 411 continues to move, The engaging pin 450 is pushed out of the insertion groove 411 by pushing the inclined surface of the insertion groove 411.

When the pedal 520 is kept still and only the motor driving force is used, the latching pin 450 enters and retracts into the insertion groove 411 every time the inner wheel 410 makes a turn. When the operation is repeated, Therefore, a noise removing fixture is additionally mounted.

5, a hook 451 is provided at the lower end of the latching pin 450 and a hook 451 is provided at the upper side of the latching pin 450, A locking protrusion 610 for preventing the hook 451 from being returned upward when the hook 451 is engaged and a switch portion 620 protruding outward from the pedal arm 510 is provided at the lower end, A fixing spring 630 which is provided in the pedal arm 510 so as to be capable of hinging movement and which applies a pressing force to the sound removing fixture so as to keep the hooking hole 451 and the engaging projection 610 engaged with each other, Is provided inside the pedal arm 510. [

When the upper end of the hook 451 comes out of the insertion groove 411 and moves downward, the noise canceling fixing part comes in contact with the hook 451 and is slightly pushed. Then, the hook 451 is returned by the fixing spring 630, The engaging protrusion 610 is engaged with the engaging pin 450 to prevent the engaging pin 450 from returning upward, so that the engaging pin 450 is kept out of the insertion groove 411, thereby preventing noise.

In this state, when it is necessary to fix the position of the pedal arm 510 with respect to the pedal shaft 500 for pedal drive, the user pushes the switch portion 620 adjacent to the pedal 520 and pushes it inward The engaging projection 451 and the engaging projection 610 are disengaged from each other while the noise removing fixture rotates about the hinge axis. As a result, the engaging pin 450 is raised upward and enters the insertion groove 411.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit and scope of the invention as set forth in the accompanying drawings. And modifications are within the scope of the appended claims.

50: Drive sprocket 60: Multistage hub sprocket
70: main chain 80: rear wheel
81: rear wheel shaft 100: hub motor
110: gear connection 111: motor gear
120: rear wheel coupling 130: bearing
140: Auxiliary gear 150: Auxiliary chain
200: pedal connection one-way clutch 230: outer wheel
260: Inner wheel 300: Motor connection one-way clutch
330: outer ring 360: inner ring
410: inner wheel 411: insertion groove
420: outer wheel 421: detent engagement groove
430: detent 440: detent spring
450: engaging pin 451: hook
460: Retaining pin spring 500: Pedal shaft
510: Pedal arm 520: Pedal
580: outer shaft 590: inner shaft
610: Locking device 620: Switch part
630: Fixing spring

Claims (7)

delete A bicycle comprising a pedal shaft, a drive sprocket provided around the pedal shaft, a multi-stage hub sprocket coupled to the rear wheel, and a main chain connecting the multi-stage hub sprocket to the drive sprocket,
A hub motor which is inserted into the rear wheel of the bicycle so as to be rotatable with respect to the fixed rear wheel of the bicycle;
A gear connecting portion having one end coupled integrally with the hub motor and the other end extending to the opposite side of the side where the multi-stage hub sprocket is positioned so as to be located outside the rear wheel of the bicycle;
A motor gear integrally coupled to a periphery of a portion of the gear connection portion that protrudes to the opposite side of a side where the multi-stage hub sprocket is positioned so as to be located outside the rear wheel of the bicycle;
A rear wheel coupling part installed around the hub motor so as to be rotatable with respect to the hub motor and coupled with a spoke of a rear wheel of the bicycle and integrally rotated with the rear wheel of the bicycle;
An auxiliary gear provided around the bicycle pedal shaft so as to face the motor gear in front and back; And
And an auxiliary chain connecting the motor gear and the auxiliary gear,
The pedal shaft
An outer shaft having a hollow formed therein and coupled with the driving sprocket;
An inner shaft through which the hollow passes and which is rotatably installed in the hollow and to which a pedal arm is connected at both ends;
Wherein the outer ring and the inner ring are mutually locked with respect to the forward rotation of the outer ring, and the inner ring is engaged with the outer ring, A motor connection one-way clutch in which the lock is released for forward rotation of the motor; And
An inner wheel coupled to the inner shaft, and an outer wheel coupled to the drive sprocket and rotatable relative to the inner wheel, wherein the outer wheel and the inner wheel are mutually immovable against the forward rotation of the inner wheel And a pedal connection one-way clutch in which the lock is released with respect to forward rotation of the outer wheel. A bicycle comprising a pedal shaft, a drive sprocket provided around the pedal shaft, a multi-stage hub sprocket coupled to the rear wheel, and a main chain connecting the multi-stage hub sprocket to the drive sprocket,
A hub motor which is inserted into the rear wheel of the bicycle so as to be rotatable with respect to the fixed rear wheel of the bicycle;
A gear connecting portion having one end coupled integrally with the hub motor and the other end extending to the opposite side of the side where the multi-stage hub sprocket is positioned so as to be located outside the rear wheel of the bicycle;
A motor gear integrally coupled to a periphery of a portion of the gear connection portion that protrudes to the opposite side of a side where the multi-stage hub sprocket is positioned so as to be located outside the rear wheel of the bicycle;
A rear wheel coupling part installed around the hub motor so as to be rotatable with respect to the hub motor and coupled with a spoke of a rear wheel of the bicycle and integrally rotated with the rear wheel of the bicycle;
An auxiliary gear provided around the bicycle pedal shaft so as to face the motor gear in front and back; And
And an auxiliary chain connecting the motor gear and the auxiliary gear,
A pedal one-way clutch including an inner wheel coupled to the pedal shaft and an outer wheel coupled to the pedal arm and rotatable with respect to the inner wheel is coupled to the left and right ends of the pedal shaft,
Wherein the pedal one-way clutch is configured such that the outer wheel and the inner wheel are mutually locked with respect to the forward rotation of the outer wheel and the lock is released with respect to the forward rotation of the inner wheel. The method of claim 3,
Wherein a detent engagement groove is provided on an inner circumferential surface of the outer wheel so that the detent can be inserted into the detent, When the inner wheel rotates in the forward direction with respect to the outer wheel, the detent engagement groove makes contact with the detent engagement groove and enters the detent, so that the detent is released from the detent engagement groove And the detent protruded by the detent spring is engaged with the detent catching groove when the outer wheel rotates in the forward direction with respect to the inner wheel. The method according to claim 3 or 4,
Wherein an engaging pin is formed at an edge of the inner wheel and is elastically supported by a retaining pin spring so that one end of the engaging pin can be inserted into or removed from the insertion groove in the inner space of the outer wheel and the pedal arm The inner circumferential surface of the insertion groove and the portion of the engaging pin inserted into the insertion groove are rounded so that when the inner wheel and the outer wheel are integrally rotated, the engaging pin is inserted into the insertion groove When the inner wheel rotates only when the locking pin is in contact with the insertion groove, the locking pin is inserted into the insertion groove by a pushing force of the locking pin spring, and when the insertion groove continuously moves, And the engaging pin pushes the inclined surface of the insertion groove so that the engaging pin is configured to come out of the insertion groove Electric bicycles that. 6. The method of claim 5,
When the pedal arm is extended vertically downward,
A hook is provided at a lower end of the latching pin,
The pedal arm is provided with a latching protrusion for preventing the hook to be prevented from returning upward when the hook is engaged with the hook, and a noise removing fixture having a switch part protruding outward from the pedal arm is provided at a lower end of the hook, It is possible to exercise,
Wherein a fixing spring for holding a state in which the hook and the engagement protrusion are engaged with each other by applying a pushing force to the noise removing fixture is provided inside the pedal arm,
When the upper end of the hook is moved out of the insertion groove and moved downward, the noise removing fixture comes into contact with the hook and then is returned by the fixing spring, so that the hook and the hook are engaged with each other, The latching pin is prevented from turning, so that the latching pin continues to come out of the insertion groove,
When the user pushes the switch part inward, the engagement of the hook and the engagement protrusion is released while the noise removing fixture is rotated, so that the engagement pin can be moved upward. 5. The method according to any one of claims 2 to 4,
Wherein the drive sprocket is a multi-stage gear.
KR1020150136221A 2015-09-25 2015-09-25 Electric bicycle KR101763929B1 (en)

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KR101763929B1 true KR101763929B1 (en) 2017-08-24

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