NL2009423A - Reverse speed-change control mechanism. - Google Patents

Reverse speed-change control mechanism. Download PDF

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Publication number
NL2009423A
NL2009423A NL2009423A NL2009423A NL2009423A NL 2009423 A NL2009423 A NL 2009423A NL 2009423 A NL2009423 A NL 2009423A NL 2009423 A NL2009423 A NL 2009423A NL 2009423 A NL2009423 A NL 2009423A
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Netherlands
Prior art keywords
gear
coupling member
lever
sun gear
pawls
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NL2009423A
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Dutch (nl)
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NL2009423C2 (en
Inventor
Xuefeng Ye
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Xuefeng Ye
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Publication of NL2009423A publication Critical patent/NL2009423A/en
Application granted granted Critical
Publication of NL2009423C2 publication Critical patent/NL2009423C2/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
    • 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

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

Description

Reverse Speed-change Control Mechanism Technical scope
This invention belongs to the category of electro-mechanical devices, related to speed-change mechanism, especially a reverse speed-change control mechanism.
Background technology
Because the structure of planetary gear transmission is compact and small, and the transmitted torque is great, it gets extensive applications. However, if we want to design a planetary gear system with multi-speed ratio, the structure of the speed changer will be very complicated, a special design of a speed-change control system with additional power is needed, and that will limit its extensive application.
An application example is the derailleur at the rear wheel and the bottom bracket of a bike, this will be a very compact and practical speed changer, and most welcome by the customers. The control mechanism on the speed changer is a very important issue. In case of a manual speed changing, it has to need additional power and a control wire, wherein the control wire must be very long to cause the components of the control mechanism is complicated and difficult to carry out. Reverse pedaling of the bike to control speed change is a very effective approach, and can save a lot of transmission components.
Invention details
This invention is a reverse speed-change control mechanism, it adopts an incomplete gearwheel, through the reverse actuation of the input axle to change the speed ratio, and the ratio of the speed changer changes once for every reverse actuation of the input axle, easy to control and the structure is simple and reliable.
The technical solution of this invention is as follows: A reverse speed-change control mechanism, which includes speed changer planet gear system centre wheel (1) with characteristics of the mentioned mechanism includes:
Poke rod (4), control piece (3), compression spring (5), coupled device (7), a number of clutch pawls (6), poke gearwheel (8) and spiral spring (2); wherein coupled device (7) and poke gearwheel (8) are installed at an axle centre of centre wheel (1); wherein groove is formed on couple device (7), with poke rod (4) connected with control piece (3) mounted on the groove; wherein poke gearwheel (8) and poke rod (4) drive control piece (3) to turn, with compression spring (5) mounted on poke rod (4) and control piece (3); wherein one end of poke rod (4) is an incomplete gearwheel, when input axle rotates reversely, the other end of poke rod (4) brings control piece (3) to turn; when input axle rotates forward, poke rod (4) returns to an initial position, and will not bring control piece (3) to turn; wherein clutch pawl (6) is mounted on the outer periphery of centre wheel (1), wherein teeth of clutch pawl (6) and centre wheel (1) can be mesh-connected; wherein spiral spring (2) is mounted on coupled device (7), under the action of spiral spring (2), coupled device (7) rotates around the axle centre of centre wheel (1);
The mechanism through poke gearwheel (8) and poke rod (4), brings control piece (3) to rotate, control piece (3) in turn through coupled device (7), brings the number of clutch pawls (6) to turn, clutch pawl (6) locks or loosens centre wheel (1) of the speed changer to achieve speed change;
When clutch pawl (6), under the action of coupled device (7) , locks centre wheel (1), the speed changer works under a speed ratio; when clutch pawl (6), under the action of coupled device (7 ) , disengages from centre wheel (1), the speed changer works under another speed ratio.
The mentioned coupled device (7) has two corresponding positions, one of them is the corresponding locked position of centre wheel (1) as described above; the other is the corresponding disengaged position centre wheel (1) as described above.
There is a number of the mentioned spiral springs (2); they are mounted on the outer periphery of coupled device (7).
This invention introduces a speed-change control mechanism of a planetary gear system, the mechanism achieves speedchanging through the reverse rotation of an input axle (generally planet carrier). The principle of the present invention is to utilize incomplete gearwheel to achieve reverse speed-changing, using clutch pawl to control the centre wheel of the planetary gear system to turn or not, it can get different speed ratios. If the centre wheel is loose, the input axle is turned backward once, the clutch pawl of the mechanism will lock the center wheel of the planetary gear; contrarily, if the centre wheel is locked, the input axle is turned backward once, the clutch pawl is disengaged from the centre wheel, hence achieving speed change.
The reverse speed-change control mechanism, through the reverse actuation of the input axle to change the speed ratio, the ratio of the speed changer changes once for every reverse actuation of the input axle, is easy to control. The present invention adopts an incomplete gearwheel to control reverse rotation, or the rotation angle of the control piece during reverse pedaling. The angle of reverse pedaling is not restricted, easy to control, the only requirement is bigger than a certain angle (e.g. 30°), simple and reliable.
Description of the Figures
Fig.l is a structural diagram of a reverse speed-change control mechanism showing a centre wheel in its rotatable state.
Fig.2 is a continued structural diagram of Fig. 1 showing centre wheel locked by clutch pawl, speed changer at a certain speed ratio, centre wheel at locked state.
Fig.3 is a continued structural diagram of Fig. 1 showing the motion of the coupled device driven by the control piece, making a number of clutch pawls disengaged from the centre wheel, illustrating the position of various components before the next reverse rotation.
Fig.4 is a continued structural diagram of Fig. 1 showing when the speed changer rotates reversely, the poke gearwheel drives the poke rod and control piece to turn, making the clutch pawl disengaged from the centre wheel; illustrating the position of various components after the next reverse rotation.
Fig.5 is an enlarged part diagram of the poke gearwheel and poke rod, showing their tooth shape.
Detailed Description of the Preferred Embodiments
Detailed description of the embodiment consolidated with the Figures for the invention of reverse speed-change control mechanism is as follows:
Referring to Fig.l to Fig.5, a mechanism mainly consists of a speed changer planetary gear system which includes centre wheel 1, poke rod 4, control piece 3, compression spring 5, coupled device 7, a number of clutch pawls 6, poke gearwheel 8, and spiral spring 2, wherein coupled device 7 and poke gearwheel 8 are located at the axle centre of the centre wheel 1.
There is a groove on the coupled device 7, and poke rod 4 and control piece 3 are located in the groove, poke rod 4 is connected to control piece 3.
Poke gearwheel 8 and poke rod 4 bring control piece 3 to rotate, compression spring 5 is pressed between poke rod 4 and control piece 3, and compression spring 5 is a leaf spring. One end of poke rod 4 is an incomplete gearwheel, it is driven and turned to a certain angle by poke gearwheel 8, the other end of poke rod 4 is connected to and able to drive control piece 3 to rotate. When the input axle rotates reversely, the other end of poke rod 4 drives control piece 3 to rotate, when the input axle rotates forward, poke rod 4 returns to an initial position thereof, during the process of return to the initial position, poke rod 4 will not drive control piece 3 to rotate.
The number of clutch pawls 6 is located around the centre wheel 1 and can be meshed with the tooth of centre wheel 1. More particularly, Figs. 1-4 show there are five of clutch pawls 6 in the present invention. The five clutch pawls 6 are to control centre wheel 1 to rotate or not. Coupled device 7 is used to synchronize the five clutch pawls 6 to work together.
Spiral spring 2 (several number) is mounted on the outer periphery of coupled device 7, under the elastic action of spiral spring 2; coupled device 7 is rotated around the axle centre of the centre wheel 1.
There are two corresponding fixed positions for coupled device 7, one corresponds to the locked position of the centre wheel 1, in that position, under the elastic action of spiral spring 2, coupled device 7 brings clutch pawls 6 to engage with and lock the centre wheel 1 in place; for the other position, control piece 3 rotates and brings the coupled device 7 to move, making clutch pawls 6 disengaged from the centre wheel 1.
The reverse speed-change mechanism, through poke gearwheel 8 and poke rod 4 selectively drives control piece 3 to rotate, which in turn, through coupled device 7 drives the number of clutch pawls 6 to turn, clutch pawl 6 locks or loosens the centre wheel 1 of the speed changer to achieve speed change.
When clutch pawl 6, under the action of coupled device 7, locks the centre wheel, the speed changer works in one speed ratio; when clutch pawl 6, under the action of coupled device 7, disengages from the centre wheel 1, the speed changes works in another speed ratio .
Take for an example of speed changer with planetary gear system to explain clearly the technical solution of this invention. This speed changer is based on whether lock or unlock the centre wheel 1 of the planetary gear system to achieve speed change.
Coupled device 7 is acted upon by the control piece 3 and the spring 2; there are two corresponding fixed positions. One of them is the locked position of the centre wheel 1, as shown in Fig.2 and Fig.3, this is the position that coupled device 7, under the elastic action of spiral spring 2, brings clutch pawl 6 to lock centre wheel 1. As shown in Fig.1 and Fig.4, this is another position that control piece 3 rotates and drives coupled device 7 to move, making clutch pawl 6 disengaged from centre wheel 1. Coupled device 7 can bring a number of clutch pawls 6 to turn in synchronization, the two fixed positions correspond to two different speed ratios of the speed changer.
The relation between clutch pawl 6 and centre wheel 1 of the speed changer is similar to that of the ratchet wheel and pawl. When clutch pawl 6, under the action of coupled device 7, locks centre wheel 1, the speed changer works on a speed ratio; when clutch pawl 6, under the action of coupled device 7, disengages from centre wheel 1, the speed changer works on another speed ratio.
Poke gearwheel 8 and poke rod 4 brings control piece 3 to rotate. In Fig.1 to Fig.4, poke gearwheel 8 and poke rod 4 is a sketch diagram, Fig.5 is the enlarged diagram of poke gearwheel 8 (part) and poke rod 4 in practical use.
The operating principle of this control mechanism is as follows :
Fig.1 shows the input axle is in forward rotation, poke rod 4 is at the right end position. Suppose clutch pawl 6 is disengaged with centre wheel 1, centre wheel 1 is free to rotate, spiral spring 2 is at stretched status, and speed changer works under a speed ratio. Now, if the input axle is in reverse rotation, the speed ratio can be changed.
There is a restoring spring (not shown) installed on poke rod 4, under the elastic action of the restoring spring, no matter the position of poke rod 4 is on the right end or on the left end, the poke rod 4 is always pulled back to the middle position. Therefore, Fig.1 shows when the input axle is in reverse rotation, poke rod 4 is shifted to the left under the pi aqH r- art- ΐ on of f hp rpsfnri no ^nrinci f fhp af-af-p
Vi» _J_ <_Λ w v^» C4. W. _L_ \y X 1 v_y X. X l \—- X. Vi- wJ KJ J- -J_ X A V«j W.V k*» -A- -I- X A wi C. *~· A A V»» U~ A A _1~ V_ -X. 0A X. kJ U. kX V— V»» »
Poke gearwheel 8 follows the rotation of the input axle, after poke rod 4 rotates to the left at a small angle; its incomplete gearwheel is meshed with poke gearwheel 8. Poke gearwheel 8 continues to bring poke rod 4 to rotate to the left, poke rod 4 drives control piece 3, altogether they rotate around the central axis of control piece 3, control piece 3 is disengaged with couple d d.€3 "V jL C 6 7. Coupled device 7, under the elastic action of spiral spring 2, rotates around the axle centre of centre wheel 1, during the rotation; it brings five clutch pawls 6 to rotate around their own axes. When control piece 3 rotates more than 900 (reverse 30 °), clutch pawl 6 locks the centre wheel (as in Fig.2), the speed changer works under another speed ratio.
Because poke rod 4 is an incomplete gearwheel, when the reverse-rotated angle is larger than 300 , poke rod 4 stops to turn, the rotated angle of control piece 3 is 90 °at that time.
The structure of poke rod 4 and the function of compression spring 5 make poke rod 4 drive control piece 3 to rotate only during the reverse rotation. When input axle is under forward rotation, poke rod 4 will not bring control piece 3 to rotate; instead, under the elastic action of the restoring sprint and poke gearwheel 8, poke rod 4 will return to the initial position as shown in Fig.1, waiting for speed change on the next reverse rotation, as shown in Fig.3. In case of reverse rotation, poke gearwheel 8 again brings poke rod 4 and control piece 3 to rotate, making clutch pawl 6 disengaged from centre wheel 1, as shown in Fig.4, practicing speed change again. At that time, spiral spring 2 is under stretched condition again.
As shown in Fig.4, under forward rotation, the control mechanism returns to the condition as shown in Fig.1.
Fig.5 shows the tooth form and coupling relationship between poke gearwheel 8 and poke rod 4.
Summarizing the above, this invention of reverse speed-change control mechanism adopts an incomplete gearwheel, through the reverse-rotated action of the input axle; speed ratio of the speed changer is changed once for every reverse rotation of the input axle, easy to control, structure is simple and reliable.
The planet gear system of the speed changer explains the structure and principle of this invention. However, the engineers and technical personnel of this field should understand, we are introducing not only a reverse speed-change mechanism, but also a reverse speed-change principle. The speed-change mechanism shown in the Figs is not a limitation to this invention. The scope involves when there is a reverse speed-change in an incomplete gearwheel, or the rotation of a control piece to control speed change, including the modification of any kind on the above practice, are all belong to the right-claiming range of this invention.

Claims (3)

1. Een in achteruitrichting bedienbaar versnellingsmechanisme met een zonnewiel (1) van een planetair tandwiel versnellingssysteem, omvattende: een hefboom (4), een besturingsdeel (3), een drukveer (5), een koppelorgaan (7), een aantal koppelingspallen (6), een tandwiel (8) en tenminste één spiraalveer (2); waarbij het koppelorgaan (7) en het tandwiel (8) aangebracht zijn om een middenas van het zonnewiel (1); waarbij een uitsparing is gevormd op het koppelorgaan (7), waarbij de hefboom (4) verbonden is met het besturingsdeel (3) die beiden zijn aangebracht in de uitsparing; waarbij het tandwiel (8) en de hefboom (4) het besturingsdeel (3) draaiend aandrijven, waarbij de drukveer (5) is aangebracht op de hefboom (4) en het besturingsdeel (3) ; waarbij één uiteinde van de hefboom (4) bestaat uit een onvolledig tandwiel, waarbij wanneer de invoeras achteruit draait, het andere uiteinde van de hefboom (4) het besturingsdeel (3) laat draaien; waarbij wanneer de invoeras vooruit gedraaid wordt, de hefboom (4) naar een beginstand terugkeert en het besturingsdeel (3) niet meer kan laten draaien; waarbij de koppelingspallen (6) zijn aangebracht aan de buitenomtrek van het zonnewiel (1), waarbij tanden van elk van de koppelingspallen en het zonnewiel (1) in elkaar grijpen; waarbij de spiraalveer (2) is aangebracht aan het koppelorgaan (7), waarbij het koppelorgaan (7) roteert rond de middenas van het zonnewiel (1) door toedoen van de spiraalveer (2) ; waarbij het mechanisme via het tandwiel (8) en de hefboom (4) het besturingsdeel (3) laat draaien, waarbij het besturingsdeel (3) op haar beurt via het koppelorgaan (7) de koppelingspallen (6) laat draaien, waarbij de koppelingspallen (6) het zonnewiel (1) van de versnelling vastgrijpen of loslaten teneinde wijziging van de versnelling te bereiken; waarbij wanneer de koppelingspallen (6) door toedoen van het koppelorgaan (7) het zonnewiel (1) vastgrijpen, de versnelling werkt met een eerste overbrengverhouding; waarbij wanneer de koppelingspallen (6) door toedoen van het koppelorgaan (7) het zonnewiel (1) loslaten, de versnelling werkt met een andere overbrengverhouding.A reverse-operated gear mechanism with a sun gear (1) of a planetary gear gear system, comprising: a lever (4), a control member (3), a compression spring (5), a coupling member (7), a number of coupling pawls (6 ), a gear (8) and at least one coil spring (2); wherein the coupling member (7) and the gear (8) are arranged about a central axis of the sun gear (1); wherein a recess is formed on the coupling member (7), the lever (4) being connected to the control part (3) both of which are arranged in the recess; wherein the gear (8) and the lever (4) rotatably drive the control part (3), the compression spring (5) being arranged on the lever (4) and the control part (3); one end of the lever (4) consisting of an incomplete gear, the other end of the lever (4) turning the control part (3) when the input shaft rotates backwards; wherein when the input shaft is rotated forward, the lever (4) returns to a starting position and the control member (3) can no longer rotate; wherein the coupling pawls (6) are arranged on the outer circumference of the sun gear (1), wherein teeth of each of the coupling pawls and the sun gear (1) engage each other; wherein the coil spring (2) is arranged on the coupling member (7), the coupling member (7) rotating around the center axis of the sun gear (1) through the coil spring (2); wherein the mechanism rotates the control part (3) via the gear (8) and the lever (4), the control part (3) in turn running the coupling pawls (6) via the coupling member (7), the coupling pawls (6) 6) grasping or releasing the sun gear (1) of the gear to achieve gear change; wherein when the clutch pawls (6) engage the sun gear (1) due to the coupling member (7), the acceleration operates with a first transmission ratio; wherein when the clutch pawls (6) release the sun gear (1) through the coupling member (7), the acceleration operates with a different transmission ratio. 2. Het in achteruitrichting bedienbaar versnellingsmechanisme volgens conclusie 1, waarbij het koppelorgaan (7) twee respectievelij ke standen heeft, waarbij in de ene stand het zonnewiel (1) is vast gezet; en waarbij in de andere stand het zonnewiel (1) is losgelaten.The reverse-operated gear mechanism according to claim 1, wherein the coupling member (7) has two respective positions, the sun gear (1) being fixed in one position; and wherein in the other position the sun gear (1) is released. 3. Het in achteruitrichting bedienbaar versnellingsmechanisme volgens conclusie 1, waarbij de een of meer spiraalveren (2) een aantal spiraalveren (2) omvatten die afzonderlij k zijn aangebracht aan de buitenomtrek van het koppelorgaan (7).The reverse-operated acceleration mechanism according to claim 1, wherein the one or more coil springs (2) comprise a plurality of coil springs (2) which are separately arranged on the outer circumference of the coupling member (7).
NL2009423A 2012-04-21 2012-09-06 Reverse speed-change control mechanism. NL2009423C2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN2012101177688A CN102602503B (en) 2012-04-21 2012-04-21 Reverse speed change control mechanism
CN201210117768 2012-04-21

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Publication Number Publication Date
NL2009423A true NL2009423A (en) 2013-10-23
NL2009423C2 NL2009423C2 (en) 2014-08-05

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CN (1) CN102602503B (en)
DE (1) DE102012107978B4 (en)
NL (1) NL2009423C2 (en)
WO (1) WO2013155649A1 (en)

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CN104373488B (en) * 2014-12-09 2016-08-17 叶雪峰 Elastomeric brakes
KR101701289B1 (en) * 2016-02-05 2017-02-01 장사석 A transmission for bicycle crank
CN106949199B (en) * 2017-05-11 2023-09-22 张家港川梭车业有限公司 Two-wheel drive pawl movable gear shifting two-gear speed change device
CN110395149A (en) * 2019-08-30 2019-11-01 湖北航嘉麦格纳座椅系统有限公司 A kind of automotive seat and its height adjuster

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Publication number Priority date Publication date Assignee Title
CH267839A (en) * 1948-09-16 1950-04-15 Ag Scintilla Bicycle hub with gear change gear with two alternately switchable gear ratios.
GB715327A (en) * 1951-08-06 1954-09-15 Robert Karl Grunau Improved change speed gearing means and primarily one suitable for bicycles
GB959351A (en) * 1961-08-02 1964-06-03 Fichtel & Sachs Ag Improvements in or relating to two-speed hubs
US3211023A (en) * 1961-08-05 1965-10-12 Fichtel & Sachs Ag Dual speed hub
US3135368A (en) * 1961-11-25 1964-06-02 Shimano Keizo Bicycle hub having a built-in two-stage speed change mechanism
DE1277051B (en) * 1964-08-24 1968-09-05 Shimano Industrial Co Freewheel hub for bicycles with a two-speed gearbox that can be switched over the chain wheel by stepping backwards
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CN2138213Y (en) * 1992-11-19 1993-07-14 裘百占 Automatic speed regulating flywheel
CN1112069A (en) * 1994-05-14 1995-11-22 陆中源 Light variable-speed chain wheel for bicycle

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Publication number Publication date
NL2009423C2 (en) 2014-08-05
DE102012107978A1 (en) 2013-10-24
WO2013155649A1 (en) 2013-10-24
CN102602503B (en) 2013-07-17
DE102012107978B4 (en) 2015-04-30
CN102602503A (en) 2012-07-25

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