KR20140121692A - Power transmission device for bicycle and accelerating device - Google Patents

Power transmission device for bicycle and accelerating device Download PDF

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Publication number
KR20140121692A
KR20140121692A KR20130038241A KR20130038241A KR20140121692A KR 20140121692 A KR20140121692 A KR 20140121692A KR 20130038241 A KR20130038241 A KR 20130038241A KR 20130038241 A KR20130038241 A KR 20130038241A KR 20140121692 A KR20140121692 A KR 20140121692A
Authority
KR
South Korea
Prior art keywords
hub
gear
bicycle
axle
shaft
Prior art date
Application number
KR20130038241A
Other languages
Korean (ko)
Inventor
복 성 김
김도환
Original Assignee
복 성 김
김도환
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 복 성 김, 김도환 filed Critical 복 성 김
Priority to KR20130038241A priority Critical patent/KR20140121692A/en
Publication of KR20140121692A publication Critical patent/KR20140121692A/en

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Classifications

    • 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
    • B62M1/00—Rider propulsion of wheeled vehicles
    • B62M1/36—Rider propulsion of wheeled vehicles with rotary cranks, e.g. with pedal cranks
    • B62M1/38—Rider propulsion of wheeled vehicles with rotary cranks, e.g. with pedal cranks for directly driving the wheel axle
    • 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
    • B62M11/14—Transmissions characterised by the use of interengaging toothed wheels or frictionally-engaging wheels of changeable ratio with planetary gears
    • B62M11/18—Transmissions characterised by the use of interengaging toothed wheels or frictionally-engaging wheels of changeable ratio with planetary gears with a plurality of planetary gear units
    • 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
    • B62M15/00—Transmissions characterised by use of crank shafts and coupling rods
    • 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
    • B62M3/02—Construction of cranks operated by hand or foot of adjustable length
    • 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
    • F16H3/00—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion
    • F16H3/003—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion the gear-ratio being changed by inversion of torque direction
    • F16H3/005—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion the gear-ratio being changed by inversion of torque direction for gearings using gears having orbital motion
    • 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
    • F16H3/00—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion
    • F16H3/44—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion using gears having orbital motion

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • General Engineering & Computer Science (AREA)
  • Structure Of Transmissions (AREA)

Abstract

[0001] The present invention relates to a power transmitting device and a bicycle speed increasing device for a bicycle equipped with a hub direct-coupled crankshaft, and more particularly, to a bicycle speed increasing device using a crankshaft directly coupled with a hub without using a chain or a sprocket, And more particularly to a power transmitting device and a bicycle speed increasing device of a bicycle which rotate a rear wheel with a very small force than a power transmitting method of a conventional bicycle by a shaft.
The power transmission device for a bicycle according to the present invention includes a hub shaft, a hub shell to which spokes of the rear wheels are connected, a pair of hub axles provided on both sides of the hub shell, A hub comprising a clutch means for transmitting said clutch means; And a pair of crankshafts, one end of which is connected to the hub axle and the other end of which is connected to the pedal shaft and rotates the hub axle by a predetermined angle by rotation of the pedal to rotate the hub shell.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a bicycle power transmission device and a bicycle accelerator having a hub-connected crankshaft,

[0001] The present invention relates to a power transmitting device and a bicycle speed increasing device for a bicycle equipped with a hub direct-coupled crankshaft, and more particularly, to a bicycle speed increasing device using a crankshaft directly coupled with a hub without using a chain or a sprocket, And more particularly to a power transmitting device and a bicycle speed increasing device of a bicycle which rotate a rear wheel with a very small force than a power transmitting method of a conventional bicycle by a shaft.

Generally, the bicycle includes a power transmission device 100 using a chain. 1 and 2, a conventional power transmission apparatus 100 includes a one-piece pedal set 113 in which both pedals 112 are integrally coupled to a single pedal shaft 111, A hub shaft 120 that is a center axis of the rear wheel, a chain 140 that transmits power, and a driven sprocket 130.

In the conventional power transmission apparatus, when the user rotates the pedal by a force of both feet, the drive sprocket is rotated, and the driven sprocket is rotated by the chain. When the driven sprocket rotates in this way, the hub shell is rotated by the clutch means to rotate the rear wheel.

That is, in the conventional power transmission apparatus, the pedal is rotated to rotate the driving sprocket and the driven sprocket, and finally the hub shell is driven to rotate. As is known, a large force is required to transmit and drive power in an uphill . Therefore, there is a case where a transmission device is mounted, but it is not a popular means of transportation because it has a limitation in reducing the power.

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above problems, and it is an object of the present invention to provide a crankshaft which is directly coupled to a hub without using a chain or a sprocket, A power transmission device for a bicycle that rotates the rear wheel with a very small force, and a bicycle speed increasing device.

In order to solve the above technical problems, a power transmission device for a bicycle according to the present invention comprises a hub shaft, a hub shell to which spokes of a rear wheel are connected, a pair of hub axles provided on both sides of the hub shell, A hub comprising a clutch means for transmitting torque of the axle to the hub shell; And a pair of crankshafts, one end of which is connected to the hub axle and the other end of which is connected to the pedal shaft to rotate the hub axle by a predetermined angle by rotation of the pedal to rotate the hub shell through the clutch means do.

The crankshaft includes a first crank coupled to the hub axle and a second crank coupled to the pedal shaft, wherein one of the first crank and the second crank is configured to be inserted into the other, It is preferable that the lengths of the guide grooves are variable.

Further, it is preferable that a speed increasing means for increasing the rotational force of the hub shell is further provided inside the hub.

The speed increasing means includes a satellite gear that is a driving gear that rotates in conjunction with the hub axle, a ring gear that is a fixed gear fixed to the hub shaft, and a sun gear that is a driven gear that accelerates and meshes with the satellite gear And the rotational force of the increased sun gear is transmitted to the hub shell through the clutch means.

A bicycle speed increasing device according to the present invention is built in a bicycle hub including a hub shaft, a hub shell, a hub axle, and a clutch means, and for increasing the rotational force of the hub shell, Satellite gear; At least one ring gear fixed to the hub shaft; And at least one sun gear rotating in conjunction with the satellite gear for accelerating rotation, wherein the rotational force of the increased sun gear is transmitted to the hub shell through the clutch means.

And at least one carrier to which the satellite gear is axially coupled is further provided.

It is also preferable that a second clutch means is interposed between the hub axle and a carrier adjacent to the hub axle.

According to the present invention, there is an effect that the rear wheel can be easily rotated by using the principle of the lever which allows much work with a small force. That is, by rotating the rear wheel by a crankshaft directly coupled to the hub without a chain or a sprocket, it can be driven with very little force.

Particularly, since the speed increasing means is provided inside the hub, more efficient driving becomes possible.

Figure 1 shows a typical bicycle.
Fig. 2 shows a power transmission device of the bicycle shown in Fig. 1. Fig.
Figures 3 and 4 are perspective views of embodiments of the present invention.
Figure 5 shows the dependent means of the embodiment according to the invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a configuration and an operation of an embodiment of the present invention will be described with reference to the accompanying drawings.

3 and 4, the present embodiment includes a hub 40 and a pair of crankshafts 30 provided on both sides of the rear wheel.

The hub 40 includes a hub shaft 41, a hub shell 42 to which spokes of the rear wheels are connected, a hub axle 43 provided on both sides of the hub shell 42, And a clutch means (44) for transmitting the rotational force of the hub shell (42) to the hub shell (42).

Both ends of the crankshaft 30 are connected to the hub axle 43 and the pedal shaft, respectively, and rotate the hub axle 43 by a predetermined angle by the rotation of the pedal 10. The length of the crankshaft 30 must be variable in order to enable pedaling in a state where the crankshaft 30 is connected to the hub axle 43 and the pedal shaft. Axis distance between the hub axle 43 and the pedal shaft varies during one cycle of pedaling.

To this end, in this embodiment, the crankshaft 30 is divided into a first crank 31 coupled to the hub axle 43 and a second crank 32 coupled to the pedal shaft. In particular, the first crank 31 31 are formed in a hollow shape so that the second crank 32 can be moved back and forth in a state where the second crank 32 is inserted into the first crank 31.

The crankshaft 30 may be integrally formed and an elongated groove may be formed at either end of the crankshaft 30 so as to be connected to the hub axle 43 and the pedal shaft.

The operation state of the embodiment according to the present invention will be described below. First, when the pedal 10 connected to the pedal link 20 is pressed and rotated at the top dead center, the second crank 32 is lowered together with the pedal shaft. As a result, the first crank 31 also descends, and as a result, the hub axle 43 to which the first crank 31 is coupled rotates within an acute angle range. At this time, since the distance between the axes of the pedal shaft and the hub axle 43 is variable, it is natural that the entire length of the crankshaft 30 also varies.

On the other hand, when the pedal 10 on one side is located at the top dead center, the opposite pedal 10 is positioned at the bottom dead center. Therefore, while one of the pedals 10 is moving from the top dead center to the bottom dead point, while the one hub axle 43 is rotated, the other pedal 10 is moved from the bottom dead center to the top dead center, It is to be prepared.

5 is a cross-sectional view showing the inside of the hub 40 of the embodiment according to the present invention. As shown, speed increasing means is provided inside the hub 40. As described above, since the hub axle 43 rotates only within an acute angle range while the pedal 10 is moving from the top dead center to the bottom dead center, it is more preferable that the hub axle 43 is provided with a speed increasing means for increasing the rotational force of the hub axle 43 Do. The hub shell 42 can be rotated very quickly by increasing the rotational force by several tens times through the speed increasing means even if the hub axle 43 does not reach one rotation for one cycle of one revolution of the pedal 10.

The speed increasing means according to the invention consists of a planetary gear set comprising a satellite gear, a ring gear and a sun gear.

The planetary gear set is widely used as a bicycle transmission means composed of a drive gear, a fixed gear and a driven gear. In the conventional bicycle transmission means, the sun gear is constituted by a fixed gear, and either the satellite gear or the ring gear is constituted by a drive gear.

However, the speed increasing means according to the present invention comprises a ring gear as a fixed gear, a satellite gear as a drive gear, and a sun gear as a driven gear. That is, although the planetary gear set has been utilized for shifting in the past, it is one of the features of the present invention in that there is no technique for utilizing the ring gear as a fixed gear.

The speed increasing means of the present invention comprises a planetary gear that is fixed to the hub shaft, the planetary gear is constituted by a driving gear that rotates in conjunction with the hub axle, and the sun gear comprises a driven gear And the rotational force of the increased sun gear is transmitted to the hub shell through the clutch means.

Hereinafter, an embodiment of the speed increasing means according to the present invention will be described in detail.

The present embodiment is characterized in that the ring gear R provided in the hub 40 and fixed to the hub shaft 41 and the first through third carriers Sa1 through Sa3, (C1 to C3), and first to third sun gears S1 to S3.

More specifically, one side of the first carrier C1 is installed to face the hub axle 43, and a second clutch means (not shown) is disposed between the hub axle 43 and one side of the first carrier C1 The rotational force of the hub axle 43 by the crankshaft 30 is transmitted to the first carrier C1 through the second clutch means 45 to rotate the first carrier C1.

The first sun gear Sa1 axially coupled to the first carrier C1 meshes with the ring gear R and the first sun gear S1, respectively.

The second carrier C2 installed adjacent to the first carrier C1 is provided with a second satellite gear Sa2 which is connected to the ring gear R and the second sun gear Sa2, And is engaged with the gear S2. And the second carrier C2 is engaged with the first sun gear S1.

The third carrier C3 disposed adjacent to the second carrier C2 is provided with a third planet gear Sa3 and the third planet gear Sa3 is disposed between the ring gear R and the third sun gear Sa3, (S3). The third carrier C3 is coupled to the second sun gear S2.

One side of the third sun gear S3 engages with the third planet gear Sa3 and the other side of the third sun gear S3 engages with the clutch means 44. [

The operating state of the speed increasing means constructed as described above will be described.

First, when the hub axle 43 rotates at an acute angle through the pedaling, the rotational force is transmitted to the first carrier C1 through the second clutch means 43. When the first carrier C1 rotates, The first satellite gear Sa1 engaged with the ring gear R fixed to the shaft 41 rotates. Therefore, the first sun gear S1 meshed at the other surface of the first sun gear Sa1 is subjected to the increased speed rotation.

When the first sun gear S1 rotates, the second carrier C2 coupled to the first sun gear S1 rotates, and the second sun gear Sa2 engaged with the fixed ring gear R is rotated Thereby causing the second sun gear S2 to perform the increased speed rotation.

When the second sun gear S2 rotates, the third carrier C3 coupled thereto rotates, and the rotation of the third carrier C3 is transmitted to the fixed ring gear R And rotates the third satellite gear Sa3 engaged. When the third sun gear Sa3 rotates, the third sun gear S3 meshing with the third sun gear S3 rotates at an increased speed. The rotational force of the increased third sun gear S3 is transmitted through the clutch means 44 Thereby rotating the hub shell 42.

The number of gear teeth of the sun gears S1 to S3 and the planetary gears Sa1 to Sa3 and the ring gear R is adjusted while the rotational force of the hub axle 43 is transmitted to the hub shell 42 by the pedaling, So that the rotational force can be increased variously.

When the pedal 10 reaches the bottom dead center, the pedal 10 on the other side reaches the top dead center, the rotational force is increased by the same mechanism and transmitted to the hub shell 42, The hub shell 42 can be rotated.

On the other hand, the clutch means 44 and the second clutch means 45 may be constituted by ratchet teeth or a clutch bearing.

The present invention is not limited to the above-described embodiments, and various modifications and changes may be made thereto without departing from the scope of the present invention.

For example, without a pedal link, the crankshaft can also operate through up and down movement of the pedal. It goes without saying that the speed increasing means can be changed into various forms.

10: Pedal 20: Pedal link
30: crankshaft 31: first crank
32: second crank 40: hub
41: hub shaft 42: hub shell
43: hub axle 44: clutch means
45: second clutch means
S1 to S3: First to third sun gears
C1 to C3: first to third carriers
Sa1 to Sa3: First to third satellite gears
R: Ring gear

Claims (7)

A hub including a hub shaft and a hub wheel to which spokes of a rear wheel are connected, a pair of hub axles provided on both sides of the hub shell, and a clutch means for transmitting rotational force of the hub axle to the hub shell; And
And a pair of crankshafts, one end of which is connected to the hub axle and the other end of which is connected to the pedal shaft and rotates the hub axle by a predetermined angle by rotation of the pedal.
The method according to claim 1,
Wherein the crankshaft includes a first crank coupled to the hub axle and a second crank coupled to the pedal shaft, the length of the crankshaft being variable.
The method according to claim 1,
And a speed increasing means for increasing the rotational force of the hub shell is further provided inside the hub.
The method of claim 3,
The speed-
A satellite gear that is a driving gear that rotates in conjunction with the hub axle,
A ring gear which is a fixed gear fixed to the hub shaft,
And a sun gear which is a driven gear that is rotated at an increased speed in engagement with the satellite gear,
And the rotational force of the increased sun gear is transmitted to the hub shell through the clutch means.
An accelerator for increasing the rotational force of the hub shell, which is built in a bicycle hub including a hub shaft, a hub shell, a hub axle and a clutch means,
At least one satellite gear rotating in conjunction with the hub axle;
At least one ring gear fixed to the hub shaft; And
And at least one or more sun gears rotating at an increased speed in engagement with the satellite gear,
And the rotational force of the increased sun gear is transmitted to the hub shell through the clutch means.
6. The method of claim 5,
And at least one carrier to which the satellite gear is axially coupled is further provided.
The method according to claim 6,
Characterized in that a second clutch means is interposed between the hub axle and a carrier adjacent to the hub axle.
KR20130038241A 2013-04-08 2013-04-08 Power transmission device for bicycle and accelerating device KR20140121692A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR20130038241A KR20140121692A (en) 2013-04-08 2013-04-08 Power transmission device for bicycle and accelerating device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR20130038241A KR20140121692A (en) 2013-04-08 2013-04-08 Power transmission device for bicycle and accelerating device

Publications (1)

Publication Number Publication Date
KR20140121692A true KR20140121692A (en) 2014-10-16

Family

ID=51993121

Family Applications (1)

Application Number Title Priority Date Filing Date
KR20130038241A KR20140121692A (en) 2013-04-08 2013-04-08 Power transmission device for bicycle and accelerating device

Country Status (1)

Country Link
KR (1) KR20140121692A (en)

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