CN106985964B - Movable gear-shifting three-gear speed change device with single-wheel drive pawl - Google Patents
Movable gear-shifting three-gear speed change device with single-wheel drive pawl Download PDFInfo
- Publication number
- CN106985964B CN106985964B CN201710331596.7A CN201710331596A CN106985964B CN 106985964 B CN106985964 B CN 106985964B CN 201710331596 A CN201710331596 A CN 201710331596A CN 106985964 B CN106985964 B CN 106985964B
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- Prior art keywords
- pawl
- wheel
- gear
- planet carrier
- frame
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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
- 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
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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
- B62M11/16—Transmissions characterised by the use of interengaging toothed wheels or frictionally-engaging wheels of changeable ratio with planetary gears built in, or adjacent to, the ground-wheel hub
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Structure Of Transmissions (AREA)
Abstract
The invention discloses a single-wheel drive pawl movable type gear shifting three-gear speed change device, which comprises: center pin, wheel hub, planetary transmission, gearshift and gearshift, planetary transmission includes: a first planetary transmission and a second planetary transmission, the first planetary transmission comprising: first planet carrier, first sun gear, first planet wheel and first ring gear, second planetary transmission includes: second planet carrier, second centre wheel, second planet wheel and second ring gear, first ring gear and second centre wheel integrated into one piece or fixed connection, one of them and center pin integrated into one piece or fixed connection in first planet carrier, second planet carrier and the second centre wheel three, the second ring gear is fixed mutually with the frame, gearshift includes: the gear shifting device comprises a pawl rack, a ratchet wheel and a plurality of pawls arranged on the pawl rack, wherein the pawl rack is sleeved on a central shaft and is in sliding connection with a hub, so that the gear shifting stability is greatly improved.
Description
[ technical field ] A method for producing a semiconductor device
The invention relates to the technical field of bicycles, in particular to a single-wheel drive pawl movable type gear shifting three-gear speed change device.
[ background of the invention ]
The bicycle speed changer is divided into an inner speed changer and an outer speed changer, the outer speed changer adopts an open chain mechanism as a transmission system, a chain is changed to different flywheels by shifting a gear shifter arranged in front of a bicycle to realize different chain transmission ratios, the outer speed changer is exposed outside, so the outer speed changer is easy to rust and easy to be interfered by external force, regular maintenance is often needed, the inner speed changer mainly adopts a planetary gear mechanism as a transmission main body, the inner speed changer is sealed inside a hub and protected by multiple layers of special sealing materials, rainwater, dust, oil dirt and the like cannot enter, the regular maintenance is not needed, and the maintenance-free advantage is realized.
[ summary of the invention ]
In order to solve the problems, the invention aims to provide a single-wheel drive pawl movable type gear shifting three-gear speed change device which is compact in structure and good in gear shifting stability.
In order to achieve the purpose, the invention adopts the technical scheme that: a single wheel drive pawl mobile shift three speed transmission comprising: center pin, wheel hub and set up planetary transmission, gearshift and the mechanism of shifting gears between center pin and wheel hub, planetary transmission includes: a first planetary transmission and a second planetary transmission, the first planetary transmission comprising: first planet carrier, first sun gear, first planet wheel and first ring gear, second planetary transmission includes: second planet carrier, second centre wheel, second planet wheel and second ring gear, first centre wheel cover is located on the center pin and is fixed mutually with the frame, first ring gear and second centre wheel integrated into one piece or fixed connection and cover are located on the center pin, one of them and center pin integrated into one piece or fixed connection in first planet carrier, second planet carrier and the second centre wheel three, the second ring gear is fixed mutually with the frame, gearshift includes: the ratchet wheel comprises a first ratchet wheel arranged on the outer circumferential surface of the first planet carrier, a second ratchet wheel arranged on the outer circumferential surface of the first gear ring and a third ratchet wheel arranged on the outer circumferential surface of the second planet carrier.
Preferably, in the above-mentioned three-gear shifting device with single wheel driven ratchet movement, one of the outer wall of the ratchet rack and the inner wall of the hub is provided with a key, and the other is provided with a key groove matched with the key to realize the sliding of the ratchet rack relative to the hub.
Preferably, in the above-described single-wheel-drive-pawl-movable three-speed gear shifting device, the shift mechanism includes: the shifting rod, a shifting part arranged on the shifting rod and a reset spring.
Preferably, in the above single-wheel-drive-pawl-movable-type gear-shifting three-gear speed change device, a boss is arranged on the shift stopper, and a groove matched with the boss is arranged on the pawl frame.
Preferably, in the above-mentioned three-gear shifting device with single-wheel-driven movable pawls, the pawl frame is disposed in a circular ring shape, the pawl frame is provided with a plurality of openings, and the pawl is accommodated in the openings and is mounted on the pawl frame through pins.
Preferably, in the above single-wheel-drive-pawl-movable-type gear-shifting three-gear speed change device, one end of the central shaft is provided with an end cover and a fastening nut, the end cover is connected with the first central wheel through teeth, and the end cover is fixed with the frame.
Preferably, in the above single-wheel-drive-pawl-moving-type gear-shifting three-gear speed change device, the elastic member is a spring, a torsion spring or a spring plate.
Preferably, in the above single-wheel-drive-pawl-movable three-gear shifting device, the pawl member is provided with a pawl portion which is matched with the ratchet wheel, and the pawl portion is provided with an engagement guide surface
Compared with the prior art, the invention has the following beneficial effects: the gear shifting mechanism in the single-wheel drive pawl movable type gear shifting three-gear speed change device not only plays a role in gear shifting, but also plays a role in an overrunning clutch, so that the speed change device does not need to be provided with the overrunning clutch independently, the structure is greatly simplified, the gear shifting operation is convenient, and the gear shifting stability is greatly improved.
[ description of the drawings ]
Fig. 1 is a schematic front view of a single wheel drive pawl shift type three-speed transmission according to embodiment 1 of the present invention.
Fig. 2 is a schematic sectional view showing the structure of a single wheel drive pawl shift type three speed transmission in embodiment 1 of the present invention.
Fig. 3 is an exploded schematic view of a single wheel drive pawl shift type three speed transmission in embodiment 1 of the present invention.
In the figure: 1. central shaft, 2, hub, 3, first planetary transmission, 30, first central wheel, 31, first planet carrier, 32, first planet wheel, 33, first ring gear, 4, second planetary transmission, 40, second central wheel, 41, second planet carrier, 42, second planet wheel, 43, second ring gear, 5, gear shifting mechanism, 50, pawl carrier, 500, elongated keyway, 501, opening, 502, spring, 503, recess, 51, pawl, 510, pawl portion, 52, first ratchet, 53, second ratchet, 54, third ratchet, 6, gear shifting mechanism, 60, gear shifting lever, 61, gear shifting member, 610, boss, 7, end cap, 8, draw-in nut.
[ detailed description ] embodiments
A single wheel drive pawl shifting three speed transmission of the present invention is described in further detail below with reference to specific embodiments.
Referring to fig. 1 to 3, a single wheel drive pawl moving type shifting three speed transmission device includes: the planetary transmission comprises a central shaft 1, a hub 2, a planetary transmission (comprising a first planetary transmission 3 and a second planetary transmission 4), a gear shifting mechanism 5 and a gear shifting mechanism 6, wherein the planetary transmission is arranged between the central shaft 1 and the hub 2. An end cover 7 and a clamping nut 8 are arranged at one end of the central shaft 1, the end cover 7 is fixed with the frame, the end cover 7 is connected with the hub 2 through a bearing or a roller, and the end cover 7 is connected with the clamping nut 8 through a bearing or a roller.
The first planetary transmission 3 includes: a first sun gear 30, a first carrier 31, a first planetary gear 32, and a first ring gear 33, and the second planetary transmission 4 includes: the first central gear 30 is connected with the end cover 7 through teeth, the end cover 7 is fixed with the frame, the first gear ring 33 and the second central gear 40 are integrally formed and sleeved on the central shaft 1, the second gear ring 43 is fixed with the frame, and in the embodiment, the second planetary carrier 41 is fixedly connected with the central shaft 1. Of course, in other embodiments, the central axle 1 may also be fixedly connected to the first planet carrier 31 or the second central wheel 40.
The shift mechanism 5 includes: a pawl frame 50, three pawls 51 mounted on the pawl frame 50, a first ratchet 52 disposed on the outer circumferential surface of the first planet carrier 31, a second ratchet 53 disposed on the outer circumferential surface of the first gear ring 33, and a third ratchet 54 disposed on the outer circumferential surface of the second planet carrier 41, wherein the pawl frame 50 is sleeved on the central shaft 1, an elongated key is disposed on the inner wall of the hub 2, an elongated key slot 500 matched with the elongated key is disposed on the outer wall of the pawl frame 50, so that the pawl frame 50 can slide back and forth relative to the hub 2, in other embodiments, the elongated key may be disposed on the outer wall of the pawl frame 50, the elongated key slot may be disposed on the inner wall of the hub 2, the relative sliding of the pawl frame 50 relative to the hub 2 may also be realized, the pawl frame 50 is disposed in a circular ring shape, the pawl frame 50 is disposed with a plurality of openings 501, the pawl 51 is received in the opening 501 and is mounted to the pawl frame 50 by a pin. The pawl member 51 is provided with a pawl portion 510, and both ends of the pawl portion 510 are respectively provided with an engagement guide surface which plays a role of guiding when the pawl portion 510 is engaged with the ratchet wheel, so that shifting is more stable. The pawl holder 50 is provided with an elastic member for controlling the initial position of the pawl 51, which in this embodiment is a spring 502, but in other embodiments may be another elastic member such as a torsion spring or an elastic piece.
The shift mechanism 6 comprises a shift rod 60, a shift member 61 mounted on the shift rod 60, and a return spring, wherein a boss 610 is disposed on the shift member 61, and a groove 503 matched with the boss 610 is disposed on the pawl member frame 50.
The working principle of the single-wheel drive pawl movable gear shifting three-gear speed change device is as follows: in a low gear, the pawl 51 is meshed with the third ratchet wheel 54 under the control of a spring, power is input from the central shaft 1, the central shaft 1 is fixedly connected with the second planet carrier 41, so the second planet carrier 41 rotates synchronously, the third ratchet wheel 54 is arranged on the second planet carrier 41, the third ratchet wheel 54 is meshed with the pawl 51, the pawl 51 is arranged on the pawl frame 50, so the pawl frame 50 rotates synchronously, and the power is finally transmitted to the hub 2 and is output by the hub 2 due to the key connection between the pawl frame 50 and the hub 2; in the middle gear, the pawl frame 50 is manually moved to make the pawl 51 on the pawl frame 50 disengaged from the third ratchet wheel 54 and engaged with the first ratchet wheel 52, power is input from the central shaft 1, the second planet carrier 41 synchronously rotates because the central shaft 1 is fixedly connected with the second planet carrier 41, the second planet carrier 41 transmits power to the second central wheel 40 through the transmission of the second planet wheels 42, the first ring gear 33 synchronously rotates because the second central wheel 40 is integrally formed with the first ring gear 33, the first ring gear 33 transmits power to the first planet carrier 31 through the transmission of the first planet wheels 32, the first ratchet wheel 52 is arranged on the outer circumferential surface of the first planet carrier 31, the first ratchet wheel 52 is engaged with the pawl 51, the pawl 51 is arranged on the pawl frame 50, so the pawl frame 50 synchronously rotates because the pawl frame 50 is connected with the hub 2 through a key, the power is finally transmitted to the hub 2 and is output from the hub 2. In the high gear, the pawl frame 50 is manually moved, so that the pawl 51 on the pawl frame 50 is disengaged from the first ratchet wheel 52 and is engaged with the second ratchet wheel 53, power is input from the central shaft 1, the central shaft 1 is fixedly connected with the second planet carrier 41, the second planet carrier 41 synchronously rotates, the second planet carrier 41 transmits power to the second central wheel 40 through transmission of the second planet wheel 42, the second central wheel 40 and the first ring gear 33 are integrally formed, so the first ring gear 33 synchronously rotates, the second ratchet wheel 53 is arranged on the first ring gear 33, the second ratchet wheel 53 is engaged with the pawl 51, the pawl 51 is arranged on the pawl frame 50, so the pawl frame 50 synchronously rotates, and power is finally transmitted to the hub 2 and is output by the hub 2 due to the key connection between the pawl frame 50 and the hub 2.
In conclusion, the gear shifting mechanism in the single-wheel-drive pawl-movable gear-shifting three-gear speed change device not only plays a role in gear shifting, but also plays a role in an overrunning clutch, so that the speed change device does not need to be provided with the overrunning clutch independently, the structure is greatly simplified, gear shifting operation is convenient, and the gear shifting stability is greatly improved.
The above-mentioned embodiments are merely illustrative of the principles and effects of the present invention, and some embodiments may be used, not restrictive; it should be noted that, for those skilled in the art, various changes and modifications can be made without departing from the inventive concept of the present invention, and these changes and modifications belong to the protection scope of the present invention.
Claims (8)
1. A single wheel drive pawl mobile shift three speed transmission, comprising: center pin, wheel hub and set up planetary transmission, gearshift and the mechanism of shifting gears between center pin and wheel hub, planetary transmission includes: a first planetary transmission and a second planetary transmission, the first planetary transmission comprising: first planet carrier, first sun gear, first planet wheel and first ring gear, second planetary transmission includes: second planet carrier, second centre wheel, second planet wheel and second ring gear, first centre wheel cover is located on the center pin and is fixed mutually with the frame, first ring gear and second centre wheel integrated into one piece or fixed connection and cover are located on the center pin, one of them and center pin integrated into one piece or fixed connection in first planet carrier, second planet carrier and the second centre wheel three, the second ring gear is fixed mutually with the frame, gearshift includes: the ratchet wheel comprises a first ratchet wheel arranged on the outer circumferential surface of the first planet carrier, a second ratchet wheel arranged on the outer circumferential surface of the first gear ring and a third ratchet wheel arranged on the outer circumferential surface of the second planet carrier.
2. A single wheel drive pawl shift three speed transmission as claimed in claim 1 wherein: one of the outer wall of the pawl rack and the inner wall of the hub is provided with a key, and the other part is provided with a key groove matched with the key so as to realize the sliding of the pawl rack relative to the hub.
3. A single wheel drive pawl travel shift three speed transmission as claimed in claim 1 wherein: the gear shifting mechanism comprises: the shifting rod, a shifting part arranged on the shifting rod and a reset spring.
4. A single wheel drive pawl shift three speed transmission as claimed in claim 3 wherein: the poking and blocking part is provided with a boss, and the pawl rack is provided with a groove matched with the boss.
5. A single wheel drive pawl shift three speed transmission as claimed in claim 1 wherein: the pawl frame is arranged in a circular ring shape, a plurality of openings are formed in the pawl frame, and the pawl is accommodated in the openings and is installed on the pawl frame through pins.
6. A single wheel drive pawl shift three speed transmission as claimed in claim 1 wherein: an end cover and a fastening nut are arranged at one end of the central shaft, the end cover is connected with the first central wheel through teeth, and the end cover is fixed with the frame.
7. A single wheel drive pawl shift three speed transmission as claimed in claim 1 wherein: the elastic piece is a spring, a torsion spring or a spring sheet.
8. A single wheel drive pawl shift three speed transmission as claimed in claim 1 wherein: the pawl component is provided with a pawl part matched with the ratchet wheel, and the pawl part is provided with a meshing guide surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710331596.7A CN106985964B (en) | 2017-05-11 | 2017-05-11 | Movable gear-shifting three-gear speed change device with single-wheel drive pawl |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710331596.7A CN106985964B (en) | 2017-05-11 | 2017-05-11 | Movable gear-shifting three-gear speed change device with single-wheel drive pawl |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106985964A CN106985964A (en) | 2017-07-28 |
| CN106985964B true CN106985964B (en) | 2022-05-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710331596.7A Active CN106985964B (en) | 2017-05-11 | 2017-05-11 | Movable gear-shifting three-gear speed change device with single-wheel drive pawl |
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| Country | Link |
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| CN (1) | CN106985964B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107339379B (en) * | 2017-08-08 | 2023-06-16 | 张家港川梭车业有限公司 | Movable three-gear speed change device of planetary transmission |
| CN107606075A (en) * | 2017-10-23 | 2018-01-19 | 张家港市九鼎机械有限公司 | A kind of centre wheel inputs the shift transmission of manual shift two |
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| GB722997A (en) * | 1951-06-14 | 1955-02-02 | Birmingham Small Arms Co Ltd | Improvements in or relating to epicyclic change-speed gears |
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| CN206797622U (en) * | 2017-05-11 | 2017-12-26 | 张家港川梭车业有限公司 | A kind of portable gear of gearshift three speed change gear of single wheel drive ratchet |
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2017
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB167230A (en) * | 1920-04-27 | 1921-07-27 | William Henry Reilly | Improvements in variable epicyclic speed gear for velocipedes |
| GB188178A (en) * | 1921-10-19 | 1922-11-09 | John James Henry Sturmey | A five speed gear for bicycles and machinery |
| GB722997A (en) * | 1951-06-14 | 1955-02-02 | Birmingham Small Arms Co Ltd | Improvements in or relating to epicyclic change-speed gears |
| US3299745A (en) * | 1963-05-17 | 1967-01-24 | Raleigh Industries Ltd | Epicyclic gear assemblies |
| US6039671A (en) * | 1999-02-09 | 2000-03-21 | Kun Teng Industry Co., Ltd. | Multi-speed drive hub for a bicycle |
| CN1313220A (en) * | 2000-03-10 | 2001-09-19 | 株式会社岛野 | Bicycle hub transmission with steer with solar gear |
| TW200732201A (en) * | 2006-02-22 | 2007-09-01 | Univ Nat Sun Yat Sen | Nine-speed drive hub for bicycles |
| WO2013067568A1 (en) * | 2011-11-08 | 2013-05-16 | Ebm Solutions Pty Ltd | Dual speed bottom bracket |
| CN105857507A (en) * | 2016-05-13 | 2016-08-17 | 桂林电子科技大学 | Novel bicycle internal transmission hub |
| CN106114747A (en) * | 2016-07-22 | 2016-11-16 | 张家港川梭车业有限公司 | A kind of bicycle use three-step gear shift driving means |
| CN106494563A (en) * | 2016-12-21 | 2017-03-15 | 张家港川梭车业有限公司 | A kind of gear ring center wheel is fixed single-wheel and directly drives many gear fully-automatic gearboxs |
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