KR20120018241A - A driver unit for planetary gear reducer - Google Patents

A driver unit for planetary gear reducer Download PDF

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Publication number
KR20120018241A
KR20120018241A KR1020100080645A KR20100080645A KR20120018241A KR 20120018241 A KR20120018241 A KR 20120018241A KR 1020100080645 A KR1020100080645 A KR 1020100080645A KR 20100080645 A KR20100080645 A KR 20100080645A KR 20120018241 A KR20120018241 A KR 20120018241A
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KR
South Korea
Prior art keywords
carrier
hub
driver
hub shell
gear
Prior art date
Application number
KR1020100080645A
Other languages
Korean (ko)
Inventor
유재복
Original Assignee
주식회사 레오
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Filing date
Publication date
Application filed by 주식회사 레오 filed Critical 주식회사 레오
Priority to KR1020100080645A priority Critical patent/KR20120018241A/en
Publication of KR20120018241A publication Critical patent/KR20120018241A/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
    • B62M11/14—Transmissions characterised by the use of interengaging toothed wheels or frictionally-engaging wheels of changeable ratio with planetary gears
    • 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
    • F16H1/00—Toothed gearings for conveying rotary motion
    • F16H1/28—Toothed gearings for conveying rotary motion with 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)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Structure Of Transmissions (AREA)

Abstract

PURPOSE: A driver unit for a planetary gear is provided to implement an automatic shift of rotation and ensure easy maintenance because of a simplified structure. CONSTITUTION: A driver unit for a planetary gear comprises a hub part(110), a first traveling part(130), a second traveling part(150), and a shift spring. The hub part has a hub shaft formed with a central sun gear and a hub shell formed with a first ratchet ring and an inner gear on the interior surface thereof. The first traveling part comprises a driver which is attached to the hub shaft to close one side of the hub shell and rotates the hub shell and a driven sprocket which rotates the driver with the power transmitted from a drive sprocket. The second traveling part comprises a first carrier and a second carrier, wherein the first carrier is fitted with a plurality of planetary gears, which engage with the sub gear and the inner gear to quickly rotate the hub shell.

Description

Driver unit for planetary gears {a driver unit for planetary gear reducer}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a driver unit for planetary gears, and more particularly to a driver unit for planetary gears which is configured to automatically shift according to a certain amount of rotation without a user's arbitrary operation.

In general, a bicycle is equipped with a speed converter, and in some cases, a speed converter is also installed in a wheelchair, a toy car using a pedal, and a fishing reel.

Such a speed converter is a general speed for converting a speed of a bicycle, for example, by constituting gears having various diameters on the front and rear wheel shafts, and by changing the position of the power-carrying chain between the aforementioned gears. In addition to the conversion device, a speed conversion device has been developed and used that is installed inside the rear wheel hub such as a bicycle, and this is to convert the speed by the gear completion ratio by arranging small gears in the hub shell.

However, the above-mentioned devices not only bring the user a hassle because the speed conversion is completed when the user performs a constant shift operation for speed conversion, and it is difficult for the unskilled users to change the speed while driving. There was a following problem.

Accordingly, an object of the present invention is to solve the conventional problems as described above, and to provide a planetary gear driver unit which is automatically shifted according to a predetermined rotation amount without any user's arbitrary operation.

The planetary gear driver unit of the present invention for achieving the above object,

A hub portion having both ends fixed to the frame and having a hub shaft having a sun gear formed at a central portion thereof, and a hub shell having a first ratcheting and an inner gear formed on an inner circumferential surface of which one side is rotatably fixed to the hub shaft while surrounding the sun gear;

A first traveling part having a driver for rotating the hub shell while being rotatably fixed to the hub shaft while closing the other side of the hub shell, and a driven sprocket for receiving the power of the driving sprocket to rotate the driver;

A first carrier having a plurality of planetary gears disposed on the inner side of the hub shell and having a plurality of planetary gears engaged with the sun gear and the inner gear to quickly rotate the hub shell; and a second carrier extending from the other side of the first carrier to the driver side. 2 running parts;

A second ratcheting disposed between the driver and the second carrier to transmit the rotational force of the rotating driver to the planetary gears of the second carrier and the first carrier, and a pedal movement of the bicycle disposed between the first carrier and the second ratcheting And a conversion unit having a conversion spring for returning the second ratchet ring when the bicycle is stopped.

In the planetary gear driver unit according to the present invention, by automatically shifting the rotation made by the operation of the conventional lever, it is possible to maximize the convenience of the user as well as to simplify the production cost and Maintenance is easy effect.

1 is a cross-sectional view schematically showing the interior of the automatic speed converter according to an embodiment of the present invention;
FIG. 2 is an exploded perspective view illustrating the second driving unit and the conversion unit illustrated in FIG. 1;
3A is a cross-sectional view schematically showing a low speed driving state of the speed converter shown in FIG. 1;
3B is a cross-sectional view schematically showing a high speed driving state of the speed converter shown in FIG. 1;
3C is a schematic cross-sectional view of a planetary gear and an internal gear of the speed converter shown in FIG. 1;

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

The planetary gear driver unit 100 according to the embodiment of the present invention,

Curved into the hub unit 110, the first driving unit 130, the second driving unit 150 and the conversion unit 170,

The hub unit 110 includes a hub shaft 112 and a hub shell 114. The hub shaft 112 has both ends fixed to a frame (not shown), and a sun gear 116 is formed at the center portion. As such, the hub shaft 112 on which the sun gear 116 is formed is surrounded by the hub shell 114. The hub shell 114 has an open shape at both ends. One side of the hub shell 114 is rotatably fixed to the hub shaft 112 by the first conical nut 118.

In addition, a first ratchet ring 122 having a plurality of first ratchet grooves 120 formed along the inner circumferential surface of the radial hub shell 114 is integrally formed on the other inner circumferential surface of the hub shell 114, and the first ratcheting 122 is formed. The inner gear 124 is radially formed along the inner circumferential surface of the hub shell 114. The first travel part 130, the second travel part 150, and the conversion part 170 are disposed in the hub part 110 formed as described above.

The first driving unit 130 includes a driver 132 and a driven sprocket 134. The driver 132 is rotatably fixed to the hub shaft 112 by the second conical nut 136 while closing the other side of the hub shell 114. At this time, the driven sprocket 134 that receives the power of the drive sprocket (not shown) is mounted on the other outer peripheral surface of the driver 132 exposed to the outside of the hub shell 114, the inner side of the hub shell 114 On one side of the extended driver 132, an annular receiving groove 138 is formed inwardly of the driver 132, and on the outer circumferential surface of the receiving groove 138, the first ratchet groove of the first ratcheting 122 is formed. A plurality of first poles 140, which are in close contact with 120 and rotate the hub shell 114, are mounted, and a plurality of second poles 142 are mounted on the inner circumferential surface of the receiving groove 138.

Preferably, the first pawl 140 and the second pawl 142 are elastically protruded by the snap ring is inserted into the groove formed in each of the center, the first pole 140 and the second pole 142 When the one-way rotational force is transmitted, the rotational force may be transmitted by maintaining the protruding state, and when the reverse rotational force is transmitted, the first pole 140 and the second pole 142 are the first ratchet groove 120 and the second, respectively. Sliding in the ratchet groove 176 and elastically into the groove formed concave on the outer and inner peripheral surface of the driver 132 may not transmit the rotational force.

The second driving unit 150 includes a first carrier 152 and a second carrier 154 integrally formed with the first carrier 152. The first carrier 152 is disposed inside the hub shell 114 while the inner circumferential surface is disposed surrounding the sun gear 116, and the outer circumferential surface of the first carrier 152 is disposed adjacent to the inner gear 124. That is, the first carrier 152 has a ring shape. On the outer circumferential surface of the first carrier 152, a plurality of planetary gears 156 are rotatably disposed radially, and at a predetermined position on the other side of the first carrier 152 on the other side of the plurality of planetary gears 156. Spring coupling groove 158 is formed. At this time, the radially inner peripheral surface of the planetary gear 156 is engaged with the sun gear 116, respectively, and the radially outer peripheral surface of the planetary gear 156 is engaged with the inner gear 124, respectively. The second carrier 154 extends while enclosing the hub shaft 112 inward of the receiving groove 138 of the driver 132 on the other side of the first carrier 152. The end of the second carrier 154 has an annular guide 160 having a diameter smaller than the diameter of the second carrier 154, the first key protrusion 162 protrudes on the radial side of the guide 160. do.

Meanwhile, the conversion unit 170 includes a second ratcheting 172 and a conversion spring 174. On the outer circumferential surface of the second ratcheting 172, a plurality of second ratchet grooves 176 selectively contacting the second pawls 142 are formed and the inner circumferential surface is fitted on the outer circumferential surface of the second carrier 154. At this time, on the inner circumferential surface of the second ratcheting 172, while turning along the guide 160, a second keying protrusion 178, which is in close contact with the first keying protrusion 162, is protruded, and the second ratcheting 172 is formed. On one side of the) is formed a second spring coupling groove 180 corresponding to the first spring coupling groove 158. Meanwhile, one end of the conversion spring 174 is mounted to the first spring coupling groove 158 and surrounds the second carrier 154, and the other end of the conversion spring 174 is mounted to the second spring coupling groove 180.

That is, the second pawl 142 of the rotating driver 132 rotates the second ratcheting 172, and the second key protrusion 178 of the rotating second ratcheting 172 moves the guide 160. While turning, the second carrier 154 and the first carrier 152 are rotated in close contact with the first key protrusion 162. As a result, the planetary gear 156 quickly rotates the hub shell 114 having the inner gear 124 formed around the sun gear 116.

The planetary gear driver unit of the present invention configured as described above,

3A to 3C, the rotational force transmitted through the guiding means causes the driven sprocket 134 and the driver 132 to rotate.

When the driver 132 is rotated in this way, the first pawl 140 of the driver 132 is in close contact with the first ratchet groove 120 of the first ratchet ring 122 to rotate the hub shell 114.

Meanwhile, while the first pawl 140 is in close contact with the first ratcheting 122, the second pawl 142 is in close contact with the second ratchet groove 176 of the second ratcheting 172 and thus the second ratcheting ( Rotate 172).

When the second ratchet ring 172 rotates as described above, the second key protrusion 178 formed on the inner circumferential surface of the second ratchet ring 172 rotates along the guide 160, and the conversion spring 174 moves to one side. Is compressed.

At this time, the second key protrusion 178 rotating along the guide 160 is in close contact with the first key protrusion 162 while rotating counterclockwise to rotate the second carrier 154 and the first carrier 152. do.

As the first carrier 152 rotates as described above, the planetary gear 156 mounted on the first carrier 152 rotates the inner gear 124 of the hub shell 114 rotating around the sun gear 116. It will rotate quickly. At this time, when the planetary gear 156 rotates the hub shell 114, the first pawl 140 is slid in the first ratchet groove 120.

On the other hand, when the rotation is stopped, the driven sprocket 134 and the driver 132 stop the rotation, and as a result the second ratchet ring 172 also stops the rotation.

At this time, the compressed conversion spring 174 rotates the second ratchet ring 172 in the clockwise direction while decompressing the compression, and the second ratchet ring 172 is formed of the second carrier 154 and the first carrier 152. Stop high speed rotation.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but many variations and modifications may be made without departing from the scope of the invention. It will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined by the appended claims.

110: hub portion 120: the first ratchet groove
130: first running part 150: second running part
160: guide 17O: converter
180: second spring coupling groove 190: bush

Claims (1)

A hub having both ends fixed to the frame and having a hub shaft having a sun gear formed at a central portion thereof, and a hub shell having a first ratcheting and an inner gear formed on an inner circumferential surface of which one side is rotatably fixed to the hub shaft while surrounding the sun gear; part;
A first traveling part having a driver for rotating the hub shell while being rotatably fixed to the hub shaft while closing the other side of the hub shell, and a driven sprocket for receiving the power of a driving sprocket to rotate the driver;
A first carrier disposed on the inner side of the hub shell and equipped with a plurality of planetary gears that mesh with the sun gear and the inner gear to rotate the hub shell quickly, and extending from the other side of the first carrier to the driver side; A second driving unit having a second carrier;
A second ratcheting which transmits the rotational force of the driver disposed between the driver and the second carrier to the planetary gears of the second carrier and the first carrier, and between the first carrier and the second ratcheting. And a conversion unit having a conversion spring disposed in the rotational position and returning the second ratcheting when stopped.
KR1020100080645A 2010-08-20 2010-08-20 A driver unit for planetary gear reducer KR20120018241A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020100080645A KR20120018241A (en) 2010-08-20 2010-08-20 A driver unit for planetary gear reducer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020100080645A KR20120018241A (en) 2010-08-20 2010-08-20 A driver unit for planetary gear reducer

Publications (1)

Publication Number Publication Date
KR20120018241A true KR20120018241A (en) 2012-03-02

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KR1020100080645A KR20120018241A (en) 2010-08-20 2010-08-20 A driver unit for planetary gear reducer

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106741561A (en) * 2016-12-31 2017-05-31 张家港川梭车业有限公司 A kind of third gear fully-automatic gearbox

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106741561A (en) * 2016-12-31 2017-05-31 张家港川梭车业有限公司 A kind of third gear fully-automatic gearbox

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