CN107244378B - Three-gear internal transmission - Google Patents
Three-gear internal transmission Download PDFInfo
- Publication number
- CN107244378B CN107244378B CN201710448252.4A CN201710448252A CN107244378B CN 107244378 B CN107244378 B CN 107244378B CN 201710448252 A CN201710448252 A CN 201710448252A CN 107244378 B CN107244378 B CN 107244378B
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- pawl
- gear shifting
- section
- ratchet wheel
- hub
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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
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- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Structure Of Transmissions (AREA)
Abstract
The invention discloses a three-gear internal transmission, comprising: center pin, wheel hub, power input spare, planetary transmission, gearshift and gear shifting mechanism, wheel hub is power output spare, the center pin is fixed mutually with the frame, planetary transmission includes: centre wheel, planet carrier, planet wheel and ring gear, gearshift includes: the gear shifting sleeve is sleeved on the central shaft and is in sliding connection with the power input part, the ratchet wheel comprises a first ratchet wheel arranged on the outer circumferential surface of the gear shifting sleeve and a second ratchet wheel arranged in the hub, the pawl part comprises a first end part, a second end part and a middle mounting part, the first end part is provided with a first pawl part matched with the first ratchet wheel, the second end part is provided with a second pawl part matched with the second ratchet wheel, and an overrunning clutch is arranged between the planet carrier and the hub, so that noise, resistance and manufacturing cost are reduced.
Description
[ technical field ] A method for producing a semiconductor device
The invention relates to the technical field of bicycles, in particular to a three-gear internal transmission.
[ 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, and is sealed inside a hub and protected by multiple layers of special sealing materials, so rainwater, dust, oil dirt and the like cannot enter, the regular maintenance is not needed, and the advantage of no maintenance is realized. The inner speed changer in the prior art is generally provided with three sets of overrunning clutches, so that the structure of the whole inner speed changer is complex, and the inner speed changer is high in noise and resistance;
therefore, there is a need for a three speed internal transmission that solves the above mentioned problems.
[ summary of the invention ]
To solve the above problems, an object of the present invention is to provide a three-speed internal transmission that is compact and can reduce noise and resistance.
In order to achieve the purpose, the invention adopts the technical scheme that: a three speed internal transmission comprising: center pin, wheel hub and set up power input spare, planetary transmission, gearshift and the mechanism of shifting gears between center pin and wheel hub, wheel hub is power output spare, the center pin is fixed mutually with the frame, planetary transmission includes: centre wheel, planet carrier, planet wheel and ring gear, the centre wheel sets up on the center pin and with center pin integrated into one piece or fixed connection, gearshift includes: the gear shifting sleeve is sleeved on the central shaft and is in sliding connection with the power input part, a first butt joint part is arranged at one end of the gear shifting sleeve, a second butt joint part matched with the first butt joint part is arranged at one end of the planet carrier, when the first butt joint part is in butt joint with the second butt joint part, the gear shifting sleeve and the planet carrier realize synchronous rotation, the ratchet comprises a first ratchet wheel arranged on the outer circumferential surface of the gear shifting sleeve and a second ratchet wheel arranged in a hub, the pawl frame is integrally formed or fixedly connected with the gear ring, an elastic part used for controlling the initial position of the pawl is arranged on the pawl frame, the pawl comprises a first end part, a second end part and a middle mounting part positioned between the first end part and the second end part, and the first end part is provided with a first pawl part matched with the first ratchet wheel, the second end part is provided with a second ratchet claw part matched with the second ratchet wheel, and an overrunning clutch is arranged between the planet carrier and the hub.
Preferably, a three speed internal transmission of the present invention is further configured to: the pawl frame is arranged in a circular ring shape, a plurality of grooves are formed in the pawl frame, and the pawl is contained in the grooves and is installed on the pawl frame through pins.
Preferably, a three speed internal transmission of the present invention is further configured to: the elastic piece is a spring, a torsion spring or a spring sheet.
Preferably, a three speed internal transmission of the present invention is further configured to: the overrunning clutch comprises an overrunning pawl and an overrunning ratchet wheel, one of the overrunning pawl and the overrunning ratchet wheel is arranged on the outer circumferential surface of the planet carrier, and the other one of the overrunning pawl and the overrunning ratchet wheel is arranged in the wheel hub.
Preferably, a three speed internal transmission of the present invention is further configured to: the first butt joint portion on the gear shifting sleeve is an external spline, and the second butt joint portion on the planet carrier is an internal spline.
Preferably, a three speed internal transmission of the present invention is further configured to: one end of the hub is connected with the central shaft through a bearing or a ball, the other end of the hub is connected with the power input part through a bearing or a ball, and the power input part is connected with the central shaft through a bearing or a ball.
Preferably, a three speed internal transmission of the present invention is further configured to: the gear shifting mechanism comprises a gear shifting rod, a fixed rod and a reset spring, the gear shifting rod axially penetrates through the center shaft and can axially move relative to the center shaft, the fixed rod radially penetrates through the gear shifting sleeve and can form relative rotation with the gear shifting sleeve, a sliding groove matched with the fixed rod is formed in the center shaft, and the reset spring is arranged between the gear shifting sleeve and a bearing or a ball.
Preferably, a three speed internal transmission of the present invention is further configured to: the outer circumference face of the gear shifting sleeve is in step-shaped arrangement and comprises: the ratchet wheel comprises a first spline section, a second spline section, a ratchet wheel section, a cylindrical section and a cavity section, wherein the ratchet wheel section, the cylindrical section and the cavity section are arranged between the first spline section and the second spline section, and a transition conical section is arranged in the cavity section.
Preferably, a three speed internal transmission of the present invention is further configured to: the ratchet wheel section is arranged on the second spline section.
Compared with the prior art, the invention has the following beneficial effects: compared with a three-gear inner transmission in the prior art, the three-gear inner transmission only uses one set of overrunning clutch, so that the structure of the inner transmission is greatly simplified, and noise, resistance and manufacturing cost are reduced.
[ description of the drawings ]
FIG. 1 is a front view schematic of a three speed internal transmission of the present invention.
FIG. 2 is a cross-sectional schematic illustration of a three speed internal transmission of the present invention.
FIG. 3 is an exploded schematic illustration of the three speed internal transmission of the present invention.
In the figure: 1. central shaft, 2, hub, 3, power input, 30, first internal spline, 4, planetary transmission, 40, central wheel, 41, planet carrier, 410, second internal spline, 42, planet wheel, 43, gear ring, 5, shifting mechanism, 50, shifting sleeve, 500, first external spline, 501, second external spline, 502, cavity section, 503, transition cone section, 504, cylindrical section, 51, first ratchet, 52, second ratchet, 53, pawl holder, 530, groove, 531, elastic member, 54, pawl, 540, first end, 5400, first pawl section, 541, second end, 5410, second pawl section, 542, intermediate mounting section, 6, shifting mechanism, 60, shifting lever, 61, fixing lever, 62, return spring, 63, oval runner, 7, overrunning clutch, 70, overrunning pawl, 71, overrunning ratchet.
[ detailed description ] embodiments
A three speed internal transmission according to the present invention is described in further detail below with reference to specific embodiments.
Referring to fig. 1 to 3, a three speed internal transmission includes: the bicycle comprises a central shaft 1, a hub 2, a power input part 3, a planetary transmission 4, a gear shifting mechanism 5 and a gear shifting mechanism 6, wherein the power input part 3, the planetary transmission 4, the gear shifting mechanism 5 and the gear shifting mechanism 6 are arranged between the central shaft 1 and the hub 2, the hub 2 is a power output part, and the central shaft 1 is fixed with a bicycle frame. One end of the hub 2 is connected with the central shaft 1 through a bearing or a ball, the other end of the hub 2 is connected with the power input part 3 through a bearing or a ball, and the power input part 3 is connected with the central shaft 1 through a bearing or a ball.
The planetary transmission 4 includes: a centre wheel 40, a planet carrier 41, planet wheels 42 and a ring gear 43, said centre wheel 40 being arranged on the centre shaft 1 and being formed integrally with the centre shaft 1. The shift mechanism 5 includes: a gear shifting sleeve 50, a first ratchet wheel 51 arranged on the outer circumference surface of the gear shifting sleeve 50, a second ratchet wheel 52 arranged in the hub 2, a pawl member frame 53 and at least one pawl member 54 arranged on the pawl member frame 53, wherein the gear shifting sleeve 50 is sleeved on the central shaft 1 and forms a sliding connection with the power input member 3, in the present embodiment, a first external spline 500 is arranged at one end of the gear shifting sleeve 50, a first internal spline 30 matched with the first external spline 500 is arranged in the power input member 3 to realize the relative sliding of the gear shifting sleeve 50 relative to the power input member 3, although other sliding connection modes can be adopted in other embodiments, a second external spline 501 is arranged at the other end of the gear shifting sleeve 50, a second internal spline 410 matched with the second external spline 501 is arranged at one end of the planet carrier 41, when the second external spline 501 is engaged with the second internal spline 410, the gear shifting sleeve 50 and the planet carrier 41 realize synchronous rotation, the pawl frame 53 and the gear ring 43 are integrally formed or fixedly connected, the pawl frame 53 is arranged in a circular ring shape, a plurality of grooves 530 are formed in the pawl frame 53, and the pawl 54 is accommodated in the grooves 530 and is mounted on the pawl frame 53 through a pin. The pawl frame 53 is provided with an elastic member 531 for controlling the initial position of the pawl 54, and the elastic member 531 may be a spring, a torsion spring or a spring plate. The pawl 54 includes a first end 540, a second end 541 and an intermediate mounting portion 542 located between the first end 540 and the second end 541, the first end 540 is provided with a first pawl portion 5400 engaged with the first ratchet 51, the second end 541 is provided with a second pawl portion 5410 engaged with the second ratchet 52, and an overrunning clutch 7 is arranged between the planet carrier 41 and the hub 2. The overrunning clutch 7 includes an overrunning pawl 70 and an overrunning ratchet 71, in this embodiment, the overrunning pawl 70 is disposed on the carrier 41, and the overrunning ratchet 71 is disposed in the hub 2, but in other embodiments, the overrunning pawl may be disposed in the hub 2, and the overrunning ratchet may be disposed on the carrier 41. The outer circumferential surface of the shift collar 50 is in a step-like arrangement, including: a first spline section (i.e., the section where the first external spline 500 is disposed), a second spline section (i.e., the section where the second external spline 501 is disposed), and a ratchet section (i.e., the section where the first ratchet 51 is disposed), a cylindrical section 504 and a cavity section 502 disposed between the first spline section and the second spline section. A transition conical section 503 is arranged in the cavity section 502. In this embodiment, the cylindrical section 504 is located between the ratchet section and the cavity section 502, and the ratchet section and the second spline section are separately arranged, but in other embodiments, the ratchet section may also be directly arranged on the second spline section, and the cavity section 502 may also be arranged between the ratchet section and the cylindrical section 504, which also can implement the present invention.
The shift mechanism 6 includes shift lever 60, dead lever 61 and reset spring 62, shift lever 60 axially wears to locate in the center pin 1 and can make axial displacement for the center pin 1, dead lever 61 radially wears to locate in the shift sleeve 50 and can rotate relatively with the shift sleeve 50, shift lever 60 is perpendicular with dead lever 61 and sets up, be equipped with on the center pin 1 with the oval spout 63 of dead lever 61 matched with, reset spring 62 sets up between shift sleeve 50 and bearing or ball. The working principle of the gear shifting mechanism is as follows: when the shift lever 60 is moved axially, the shift lever 60 will push against the fixing rod 61 to move axially together, and further drive the shift sleeve 50 to move axially together, and the shift sleeve 50 can return to the original position under the action of the return spring 62.
The working principle of the three-gear inner transmission is as follows: the internal speed changer of the invention realizes three-gear speed change, power is input by the power input part 3, power is output by the hub 2, at low gear, the gear shifting sleeve 50 is moved by moving the gear shifting rod 60, the ratchet wheel section of the gear shifting sleeve 50 is positioned at the position of the pawl part 54, at the same time, the first ratchet wheel 51 on the gear shifting sleeve 50 is meshed with the first pawl part 5400 of the pawl part 54, the second ratchet wheel 52 in the hub 2 is disengaged with the second pawl part 5410 of the pawl part 54, power is input by the power input part 3, as the power input part 3 is connected with the gear shifting sleeve 50 by a spline, the gear shifting sleeve 50 rotates synchronously, as the first ratchet wheel 51 on the gear shifting sleeve 50 is meshed with the first pawl part 5400 on the pawl part 54, the pawl part frame 53 rotates, as the pawl part frame 53 and the gear ring 43 are integrally formed, the gear ring 43 rotates, the gear ring 43 transmits power to the planet carrier 41 by the transmission of the planet gears 42, the planet carrier 41 drives the wheel hub 2 to output power through the overrunning clutch, when the gear is in a middle gear, the gear shifting sleeve 50 is moved by moving the gear shifting rod 60, the cylindrical section 504 of the gear shifting sleeve 50 is positioned at the position of the pawl member 54, a part of the second external spline 501 of the gear shifting sleeve 50 is connected with the second internal spline 410 of the planet carrier, at the moment, the first ratchet wheel 51 on the gear shifting sleeve 50 is disengaged with the first pawl part 5400 of the pawl member 54, the second ratchet wheel 52 in the wheel hub 2 is disengaged with the second pawl part 5410 of the pawl member 54, the second external spline 501 at one end of the gear shifting sleeve 50 is engaged with the part of the second internal spline 410 at one end of the planet carrier 41, and power is input through the power input part 3, because the power input member 3 is connected with the shift sleeve 50 through the spline, the shift sleeve 50 rotates synchronously, since the shift sleeve 50 is connected to the carrier 41 by a spline, the carrier 41 rotates, and the carrier 41 drives the hub 2 to output power through the overrunning clutch. In high gear, the overrunning clutch is in a follow-up state, the gear shifting sleeve 50 is moved by moving the gear shifting rod 60, so that the conical section 503 of the gear shifting sleeve 50 moves over the first end 540 of the pawl 54, at the same time, the first end 540 of the pawl 54 is positioned in the cavity 502 of the gear shifting sleeve 50, the second external spline 501 of the gear shifting sleeve 50 is completely connected with the internal spline 410 of the planet carrier, the first ratchet 51 on the gear shifting sleeve 50 is disengaged from the first pawl part 5400 of the pawl 54, the second ratchet 52 in the hub 2 is engaged with the second pawl part 5410 of the pawl 54, the second external spline 501 at one end of the gear shifting sleeve 50 is engaged with the second internal spline 410 at one end of the planet carrier 41, power is input by the power input member 3, the gear shifting sleeve 50 rotates synchronously due to the spline connection between the power input member 3 and the gear shifting sleeve 50, and the planet carrier 41 are connected by a spline, therefore, the planet carrier 41 rotates, the planet carrier 41 transmits power to the ring gear 43 through the transmission of the planet gears 42, the ring gear 43 drives the pawl carrier 53 and the pawl 54 to rotate, and the second pawl portion 5410 on the pawl 54 is meshed with the second ratchet wheel 52 in the hub 2, so that the power is finally transmitted to the hub 2.
In conclusion, the three-gear inner transmission only uses one set of overrunning clutch, so that the structure of the inner transmission is greatly simplified, and the noise, the resistance and the manufacturing cost are reduced.
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 (9)
1. A three speed internal transmission, comprising: center pin, wheel hub and set up power input spare, planetary transmission, gearshift and the mechanism of shifting gears between center pin and wheel hub, wheel hub is power output spare, the center pin is fixed mutually with the frame, planetary transmission includes: centre wheel, planet carrier, planet wheel and ring gear, the centre wheel sets up on the center pin and with center pin integrated into one piece or fixed connection, gearshift includes: the gear shifting sleeve is sleeved on the central shaft and is in sliding connection with the power input part, a first butt joint part is arranged at one end of the gear shifting sleeve, a second butt joint part matched with the first butt joint part is arranged at one end of the planet carrier, when the first butt joint part is in butt joint with the second butt joint part, the gear shifting sleeve and the planet carrier realize synchronous rotation, the ratchet comprises a first ratchet wheel arranged on the outer circumferential surface of the gear shifting sleeve and a second ratchet wheel arranged in a hub, the pawl frame is integrally formed or fixedly connected with the gear ring, an elastic part used for controlling the initial position of the pawl is arranged on the pawl frame, the pawl comprises a first end part, a second end part and a middle mounting part positioned between the first end part and the second end part, and the first end part is provided with a first pawl part matched with the first ratchet wheel, the second end part is provided with a second ratchet claw part matched with the second ratchet wheel, and an overrunning clutch is arranged between the planet carrier and the hub.
2. A three speed internal transmission as claimed in claim 1, wherein: the pawl frame is arranged in a circular ring shape, a plurality of grooves are formed in the pawl frame, and the pawl is contained in the grooves and is installed on the pawl frame through pins.
3. A three speed internal transmission as claimed in claim 1, wherein: the elastic piece is a spring, a torsion spring or a spring sheet.
4. A three speed internal transmission as claimed in claim 1, wherein: the overrunning clutch comprises an overrunning pawl and an overrunning ratchet wheel, one of the overrunning pawl and the overrunning ratchet wheel is arranged on the outer circumferential surface of the planet carrier, and the other of the overrunning pawl and the overrunning ratchet wheel is arranged in the hub.
5. A three speed internal transmission as defined in claim 1, wherein: the first butt joint portion on the gear shifting sleeve is an external spline, and the second butt joint portion on the planet carrier is an internal spline.
6. A three speed internal transmission as claimed in claim 1, wherein: one end of the hub is connected with the central shaft through a bearing or a ball, the other end of the hub is connected with the power input part through a bearing or a ball, and the power input part is connected with the central shaft through a bearing or a ball.
7. A three speed internal transmission as claimed in claim 1, wherein: the gear shifting mechanism comprises a gear shifting rod, a fixed rod and a reset spring, the gear shifting rod axially penetrates through the center shaft and can axially move relative to the center shaft, the fixed rod radially penetrates through the gear shifting sleeve and can form relative rotation with the gear shifting sleeve, a sliding groove matched with the fixed rod is formed in the center shaft, and the reset spring is arranged between the gear shifting sleeve and a bearing or a ball.
8. A three speed internal transmission as defined in claim 1, wherein: the outer circumference face of the gear shifting sleeve is in step-shaped arrangement and comprises: the ratchet wheel comprises a first spline section, a second spline section, a ratchet wheel section, a cylindrical section and a cavity section, wherein the ratchet wheel section, the cylindrical section and the cavity section are arranged between the first spline section and the second spline section, and a transition conical section is arranged in the cavity section.
9. A three speed internal transmission as claimed in claim 8, wherein: the ratchet wheel section is arranged on the second spline section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710448252.4A CN107244378B (en) | 2017-06-14 | 2017-06-14 | Three-gear internal transmission |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710448252.4A CN107244378B (en) | 2017-06-14 | 2017-06-14 | Three-gear internal transmission |
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| Publication Number | Publication Date |
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| CN107244378A CN107244378A (en) | 2017-10-13 |
| CN107244378B true CN107244378B (en) | 2022-06-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710448252.4A Active CN107244378B (en) | 2017-06-14 | 2017-06-14 | Three-gear internal transmission |
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| CN (1) | CN107244378B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107600302B (en) * | 2017-10-23 | 2023-02-28 | 张家港川梭车业有限公司 | Transmission shaft output speed change device |
| CN107953966A (en) * | 2017-12-21 | 2018-04-24 | 张家港川梭车业有限公司 | A kind of centre wheel fixes centre shaft variable speed device |
| CN107933815A (en) * | 2017-12-21 | 2018-04-20 | 张家港川梭车业有限公司 | A kind of gear ring fixes centre shaft variable speed device |
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| GB1495774A (en) * | 1974-05-29 | 1977-12-21 | Fichtel & Sachs Ag | Multi-speed gear hubs |
| JPS6418792A (en) * | 1987-07-13 | 1989-01-23 | Shimano Industrial Co | Variable speed gear for bicycle |
| CN1199696A (en) * | 1997-05-08 | 1998-11-25 | 株式会社岛野 | Built-in variable speed wheel hub for bicycle |
| CN1228381A (en) * | 1998-03-09 | 1999-09-15 | 黄志伟 | Speed variator for bicycle |
| CN1310118A (en) * | 2000-02-25 | 2001-08-29 | 黄志伟 | Speed varying back shaft for bicycle |
| CN101152896A (en) * | 2007-10-19 | 2008-04-02 | 韦建葵 | Multi-speed roadster and rear axis planetary gearing speed changer thereof |
| CN103569306A (en) * | 2013-11-19 | 2014-02-12 | 李激初 | Inner speed changer of bicycle |
| CN106428403A (en) * | 2016-08-31 | 2017-02-22 | 张家港川梭车业有限公司 | Three-level variable-speed drive device stable in speed change |
| 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 |
| CN206797621U (en) * | 2017-06-14 | 2017-12-26 | 张家港川梭车业有限公司 | One kind three keeps off internal speed changer |
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2017
- 2017-06-14 CN CN201710448252.4A patent/CN107244378B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1495774A (en) * | 1974-05-29 | 1977-12-21 | Fichtel & Sachs Ag | Multi-speed gear hubs |
| JPS6418792A (en) * | 1987-07-13 | 1989-01-23 | Shimano Industrial Co | Variable speed gear for bicycle |
| CN1199696A (en) * | 1997-05-08 | 1998-11-25 | 株式会社岛野 | Built-in variable speed wheel hub for bicycle |
| CN1228381A (en) * | 1998-03-09 | 1999-09-15 | 黄志伟 | Speed variator for bicycle |
| CN1310118A (en) * | 2000-02-25 | 2001-08-29 | 黄志伟 | Speed varying back shaft for bicycle |
| CN101152896A (en) * | 2007-10-19 | 2008-04-02 | 韦建葵 | Multi-speed roadster and rear axis planetary gearing speed changer thereof |
| CN103569306A (en) * | 2013-11-19 | 2014-02-12 | 李激初 | Inner speed changer of bicycle |
| CN106428403A (en) * | 2016-08-31 | 2017-02-22 | 张家港川梭车业有限公司 | Three-level variable-speed drive device stable in speed change |
| 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 |
| CN206797621U (en) * | 2017-06-14 | 2017-12-26 | 张家港川梭车业有限公司 | One kind three keeps off internal speed changer |
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