CN106763569B - Gear ring double-center-wheel fixed single-wheel direct-drive multi-gear full-automatic transmission - Google Patents
Gear ring double-center-wheel fixed single-wheel direct-drive multi-gear full-automatic transmission Download PDFInfo
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- CN106763569B CN106763569B CN201611193154.2A CN201611193154A CN106763569B CN 106763569 B CN106763569 B CN 106763569B CN 201611193154 A CN201611193154 A CN 201611193154A CN 106763569 B CN106763569 B CN 106763569B
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- 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
- F16H3/62—Gearings having three or more central gears
- F16H3/66—Gearings having three or more central gears composed of a number of gear trains without drive passing from one train to another
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- 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
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D41/00—Freewheels or freewheel clutches
- F16D41/12—Freewheels or freewheel clutches with hinged pawl co-operating with teeth, cogs, or the like
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- 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
- F16H57/00—General details of gearing
- F16H57/02—Gearboxes; Mounting gearing therein
- F16H57/023—Mounting or installation of gears or shafts in the gearboxes, e.g. methods or means for assembly
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- 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
- F16H2200/00—Transmissions for multiple ratios
- F16H2200/20—Transmissions using gears with orbital motion
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- 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
- F16H2200/00—Transmissions for multiple ratios
- F16H2200/20—Transmissions using gears with orbital motion
- F16H2200/203—Transmissions using gears with orbital motion characterised by the engaging friction means not of the freewheel type, e.g. friction clutches or brakes
- F16H2200/2038—Transmissions using gears with orbital motion characterised by the engaging friction means not of the freewheel type, e.g. friction clutches or brakes with three engaging means
Abstract
The invention discloses a gear ring double-center-wheel fixed single-wheel direct-drive multi-gear full-automatic transmission, which comprises: the center pin, wheel hub and speed change mechanism, speed change mechanism includes planetary gear, overrunning clutch and automatic centrifugal gearshift, planetary gear includes first planetary gear, second planetary gear and third planetary gear, the overrunning clutch sets up between the planet carrier and the wheel hub of second planetary gear or sets up between the ring gear and the wheel hub of second planetary gear, automatic centrifugal gearshift includes: the automatic centrifugal shifting mechanism comprises a pawl carrier, a ratchet wheel and at least one pawl, wherein the pawl carrier is arranged in a hub, and the ratchet wheels of the automatic centrifugal shifting mechanism are respectively arranged on a first planetary transmission central wheel, a second planetary transmission gear ring and a third planetary transmission gear ring or respectively arranged on the first planetary transmission central wheel and the third planetary transmission gear ring. The speed changer can reduce the requirement on pedal frequency in middle and high gears.
Description
[ field of technology ]
The invention relates to the technical field of bicycles, in particular to a gear ring double-center-wheel fixed single-wheel direct-drive multi-gear full-automatic transmission.
[ background Art ]
The bicycle speed variator is divided into an inner speed variator and an outer speed variator, the outer speed variator adopts an open type chain mechanism as a transmission system, and the chain is changed to different flywheels to realize different chain transmission ratios by stirring a gear shifter arranged in front of the bicycle. The internal transmission of the prior art has the following common defects: 1. manual gear shifting is needed, and automatic gear shifting cannot be realized; 2. when the internal transmission is shifted to the high gear, if the tread frequency is decreasing, it is difficult for the transmission to remain in the high gear.
[ invention ]
In order to solve the problems, the invention aims to provide a gear ring double-center-wheel fixed single-wheel direct-drive multi-gear full-automatic transmission capable of reducing the requirement on pedal frequency.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows: a ring gear dual center fixed single wheel direct drive multi-speed full automatic transmission comprising: the planetary transmission comprises a first planetary transmission, a third planetary transmission and a second planetary transmission positioned between the first planetary transmission and the third planetary transmission, each set of planetary transmission comprises a planet carrier, a gear ring, a planet wheel and a central wheel, the gear ring of the first planetary transmission is fixed with a frame, the planet carrier of the first planetary transmission is integrally formed with or fixedly connected with the central shaft, the planet carrier of the second planetary transmission is integrally formed with or fixedly connected with the central shaft, the central wheels of the first planetary transmission, the second planetary transmission and the third planetary transmission are all sleeved on the central shaft, the central wheels of the second planetary transmission and the central wheels of the third planetary transmission form a central wheel assembly, the central wheel assembly is fixed with the frame, the planet carrier of the second planetary transmission and the gear ring of the third planetary transmission are integrally formed with or fixedly connected with the central shaft, and the planet carrier of the planetary transmission is integrally formed with or fixedly connected with the central shaft, and the central wheel of the planetary transmission is arranged between the first planetary transmission and the first gear ring of the first planetary transmission or the hub, and the central wheel of the planetary transmission is arranged between the first planetary transmission and the second planetary transmission or between the first gear ring of the third planetary transmission and the hub: the automatic centrifugal shifting mechanism comprises a pawl carrier, a ratchet wheel and at least one pawl, wherein the pawl is arranged on the pawl carrier, the pawl carrier is arranged in a hub, and the ratchet wheels of a plurality of sets of automatic centrifugal shifting mechanisms are respectively arranged on a first planetary transmission central wheel, a second planetary transmission gear ring and a third planetary transmission gear ring or respectively arranged on the first planetary transmission central wheel and the third planetary transmission gear ring.
Preferably, a ring gear double-center-wheel fixed single-wheel direct-drive multi-gear full automatic transmission in the present invention is further provided with: the automatic centrifugal gear shifting mechanism further comprises at least one linkage piece, the pawl piece is installed on the pawl fixing frame through a first connecting piece, the linkage piece is installed on the pawl fixing frame through a second connecting piece, the pawl piece and the linkage piece are arranged at intervals in the circumferential direction, and the pawl piece comprises: the first end, the second end and the first installation department that sets up between first end and second end are equipped with the pawl portion that cooperatees with the ratchet in the inner wall department of the second end of at least one pawl, the first installation department of pawl is equipped with the first mounting hole that is used for installing first connecting piece, the link includes third end, fourth end and sets up the second installation department between third end and fourth end, the second installation department of link is equipped with the second mounting hole that is used for installing the second connecting piece, the first end of pawl and/or the fourth end of link are equipped with the balancing weight, along radial the first end limit of pawl is located the inboard of the fourth end of link, the second end limit of pawl is located the inboard of the third end of link, the third end limit of link is located the inboard of the second end of pawl, on the pawl or the link is located the mount, the spring member that is used for the initial position of pawl or pawl on the link.
Preferably, a ring gear double-center-wheel fixed single-wheel direct-drive multi-gear full automatic transmission in the present invention is further provided with: the automatic centrifugal gear shifting mechanism further comprises at least one linkage piece, the pawl piece is installed on the pawl fixing frame through a first connecting piece, one end of the linkage piece is movably connected with one of the adjacent pawl pieces, the other end of the linkage piece is movably connected with the other adjacent pawl piece, the pawl pieces and the linkage piece are arranged at intervals in the circumferential direction, each pawl piece comprises a first end portion, a second end portion and a first installation portion arranged between the first end portion and the second end portion, a balancing weight is arranged at the first end portion of each pawl piece, a pawl portion matched with a ratchet wheel is arranged at the inner wall of the second end portion of each pawl piece, a first installation hole for installing the first connecting piece is formed in the first installation portion of each pawl piece, and an elastic piece for controlling the initial position of each pawl piece is installed on the pawl piece frame.
Preferably, a ring gear double-center-wheel fixed single-wheel direct-drive multi-gear full automatic transmission in the present invention is further provided with: the elastic piece is a torsion spring, a spring or a spring piece.
Preferably, a ring gear double-center-wheel fixed single-wheel direct-drive multi-gear full automatic transmission in the present invention is further provided with: the pawl mount includes: the pawl is mounted on the mounting seats.
Preferably, a ring gear double-center-wheel fixed single-wheel direct-drive multi-gear full automatic transmission in the present invention is further provided with: the first connecting piece and the second connecting piece are pins.
Preferably, a ring gear double-center-wheel fixed single-wheel direct-drive multi-gear full automatic transmission in the present invention is further provided with: the pawl piece and the linkage piece are arranged in an involute shape or an arc shape.
Preferably, a ring gear double-center-wheel fixed single-wheel direct-drive multi-gear full automatic transmission in the present invention is further provided with: the planet carrier of the first planetary transmission is connected with the central shaft through a spline, and the planet carrier of the second planetary transmission is connected with the central shaft through a spline.
Preferably, a ring gear double-center-wheel fixed single-wheel direct-drive multi-gear full automatic transmission in the present invention is further provided with: one end of the central shaft is provided with a boss, a bearing or a ball is arranged between the boss and a gear ring of the first planetary transmission, a bearing or a ball is arranged between the gear ring of the first planetary transmission and a hub, a tightening piece is arranged at one end of the central wheel assembly, a bearing or a ball is arranged between the central wheel assembly and the tightening piece, and a bearing or a ball is arranged between the central wheel assembly and the hub
Compared with the prior art, the invention has the following beneficial effects: the gear ring double-center-wheel fixed single-wheel direct-drive multi-gear full-automatic transmission has the advantages of compact structure, convenience in installation, high transmission efficiency, firm gear shifting and stable gear shifting, and in addition, the transmission can reduce the requirement on pedal frequency in middle and high gears, so that riding is easier.
[ description of the drawings ]
Fig. 1 is a schematic diagram of a front view of a ring gear double-center-wheel fixed single-wheel direct-drive full automatic transmission according to embodiment 1 of the present invention.
Fig. 2 is an exploded view of a ring gear double-sun-wheel fixed single-wheel direct-drive full automatic transmission according to embodiment 1 of the present invention.
Fig. 3 is a schematic cross-sectional view taken along line A-A of fig. 1.
Fig. 4 is a schematic structural view of a first automatic centrifugal shift mechanism in embodiment 1 of the invention.
Fig. 5 is a schematic cross-sectional structure of a ring gear double-center-wheel fixed single-wheel direct-drive multi-speed full automatic transmission in embodiment 2 of the present invention.
In the figure: 1. a center shaft, 10, a boss, 2, a hub, 3, a planetary transmission, 30, a first planetary transmission, 300, a first carrier, 301, a first ring gear, 302, a first planetary gear, 303, a first end portion, 4011, a second end portion, 4012, a first mounting portion, a second ring gear, 312, a second planetary gear, 313, a second sun gear, 32, a third planetary transmission, 320, a third carrier, 321, a third ring gear, 322, a third planetary gear, 323, a third sun gear, 4, an automatic centrifugal shift mechanism, 40, a first automatic centrifugal shift mechanism, 400, a first pawl carrier, 4000, an elastic member, 401, a first pawl, 4010, a first end portion, 4011, a second end portion, 4012, 4013, pawl portion, 4014, first mounting hole, 4015, weight, 402, first linkage, 4020, third end, 4021, fourth end, 4022, second mounting portion, 4023, second mounting hole, 403, first ratchet, 41, second automatic centrifugal shift mechanism, 410, second pawl holder, 411, second pawl, 4110, weight, 4111, pawl portion, 412, second linkage, 413, second ratchet, 42, third automatic centrifugal shift mechanism, 420, third pawl holder, 421, third pawl, 4210, weight, 4211, pawl portion, 422, third linkage, 423, third ratchet, 5, overrunning clutch, 50, pawl, 51, ratchet, 6, and tightener.
[ detailed description ] of the invention
The following describes the gear ring dual-center fixed single-wheel direct-drive multi-gear full-automatic transmission according to the present invention in further detail through specific embodiments.
Example 1
Referring to fig. 1 to 4, a ring gear double-center-wheel fixed single-wheel direct-drive multi-gear full automatic transmission includes: the novel planetary gear transmission comprises a central shaft 1, a hub 2 and a speed change mechanism arranged between the central shaft 1 and the hub 2, wherein the central shaft 1 is a power input piece, the hub 2 is a power output piece, and the speed change mechanism comprises three sets of planetary gear transmissions 3 and three sets of automatic centrifugal gear shifting mechanisms 4.
The planetary transmission 3 includes a first planetary transmission 30, a second planetary transmission 31 and a third planetary transmission 32, the first planetary transmission 30 includes a first planet carrier 300, a first gear ring 301, a first planet wheel 302 and a first sun wheel 303, the second planetary transmission 31 includes a second planet carrier 310, a second gear ring 311, a second planet wheel 312 and a second sun wheel 313, the third planetary transmission 32 includes a third planet carrier 320, a third gear ring 321, a third planet wheel 322 and a third sun wheel 323, the first gear ring 301 is fixed with the frame, the first planet carrier 300 is connected with the central shaft 1 through a spline, the second planet carrier 310 is connected with the central shaft 1 through a spline, the first sun wheel 303, the second sun wheel 313 and the third sun wheel 323 are all sleeved on the central shaft 1, the second sun wheel 313 and the third sun wheel 323 are integrally formed into a sun wheel assembly, the sun wheel assembly is fixed with the frame, the second gear ring 311 and the third ring gear 311 are integrally formed with the third carrier, the second ratchet wheel hub 310 is integrally formed with the third carrier, the ratchet wheel hub is also integrally formed with the third carrier hub 310, the ratchet wheel hub is also arranged on the ratchet wheel hub 5, the ratchet wheel is arranged in the ratchet wheel 50, the ratchet wheel 50 is arranged in the ratchet wheel 50, and the ratchet wheel 50 is arranged in the ratchet wheel, and the ratchet wheel 50.
The automatic centrifugal shift mechanism 4 includes: the first automatic centrifugal shift mechanism 40, the second automatic centrifugal shift mechanism 41 and the third automatic centrifugal shift mechanism 42, wherein the first automatic centrifugal shift mechanism 40 comprises a first pawl holder 400, a plurality of first pawls 401, a plurality of first linkage members 402 and a first ratchet 403, and of course, in other embodiments, no linkage member 402 or only one pawl member 401 is provided, the invention can be implemented as well. The first pawl cage 400 is disposed in the hub 2, the first ratchet wheel 403 is disposed outside the first center wheel 303 and integrally formed with the first center wheel 303, the first pawl cage 400 is provided with an elastic member 4000 for controlling the initial position of the first pawl 401, the elastic member 4000 may be a torsion spring, a spring or a leaf spring, and the elastic member 4000 may be mounted on the first pawl 401 or the first link member 402 in other embodiments, as well as implement the present invention. The first pawls 401 and the first linking members 402 are each mounted on the first pawl cage 400 by pins, the plurality of first pawls 401 and the plurality of first linking members 402 are circumferentially spaced apart, and the first pawls 401 include: the first mounting portion 4012 is provided with a first mounting hole 4014 for mounting a pin, the first end portion 4010, the second end portion 4011 and a first mounting portion 4012 arranged between the first end portion 4010 and the second end portion 4011, the inner wall of the second end portion 4011 of each pawl 401 is provided with a pawl portion 4013 matched with the first ratchet 403 in the present embodiment, however, in other embodiments, only the inner wall of the second end portion 4011 of one pawl 401 is provided with a pawl portion 4013 matched with the first ratchet 403, or only the inner walls of the second end portions 4011 of two pawls 401 are provided with pawl portions 4013 matched with the first ratchet 403, which can realize the present invention. The first linkage member 402 includes a third end 4020, a fourth end 4021, and a second mounting portion 4022 disposed between the third end 4020 and the fourth end 4021, the second mounting portion 4022 of the first linkage member 402 is provided with a second mounting hole 4023 for mounting a pin, the first end 4010 of the first pawl member 401 and the fourth end 4021 of the first linkage member 402 are both provided with weights, the first end 4010 of the first pawl member 401 is limited in the radial direction on the inner side of the fourth end 4021 of the first linkage member 402, and the second end 4011 of the first pawl member 401 is limited in the radial direction on the inner side of the third end 4020 of the first linkage member 402. The first pawl 401 and the first link 402 are disposed in an involute or arc configuration such that the pivot angle of the first pawl 401 is consistent with the pivot angle of the first link 402. The second automatic centrifugal shift mechanism 41 has the same structure as the first automatic centrifugal shift mechanism 40, and includes a second pawl rack 410, a plurality of second pawls 411, a plurality of second linkage members 412 and a second ratchet 413, where the second pawl rack 410 is disposed in the hub 2, the second ratchet 413 is disposed outside the second gear ring 311, the third automatic centrifugal shift mechanism 42 has the same structure as the first automatic centrifugal shift mechanism 40, and includes a third pawl rack 420, a plurality of third pawls 421, a plurality of third linkage members 422 and a third ratchet 423, the third pawl rack 420 is disposed in the hub 2, the third ratchet 423 is disposed on the third gear ring 321, and of course, in other embodiments, the automatic centrifugal shift mechanism may also have a structure in which one end of the linkage member is movably connected with one of the adjacent pawls, that is, the linkage member may be movably connected with two adjacent pawls by bending two ends, respectively, or directly and movably connected with two adjacent pawls by a link pin, so as to form a balance link.
One end of the central shaft 1 is provided with a boss 10, a bearing or a ball is arranged between the boss 10 and the first gear ring 301, a bearing or a ball is arranged between the first gear ring 301 and the hub 2, a tightening piece 6 is arranged at one end of the central wheel assembly, a bearing or a ball is arranged between the central wheel assembly and the tightening piece 6, and a bearing or a ball is arranged between the central wheel assembly and the hub 2.
The working principle of the gear ring double-center-wheel fixed single-wheel direct-drive full-automatic transmission is as follows: when the first gear is at low speed, the pawl 50 in the overrunning clutch 5 is a normally open pawl, that is, the second planet carrier 310 and the hub 2 are always kept in an engaged state, the power is input by the central shaft 1, because the second planet carrier 310 is fixed with the central shaft 1, the second planet carrier 310 is still engaged with the hub 2, and therefore, the power is finally transmitted to the hub 2 and is output by the hub 2, along with the lifting of the speed of the central shaft 1, the weight block end of the second pawl 411 of the second automatic centrifugal shifting mechanism 41 moves in the direction away from the axle center under the centrifugal force, because the weight block 4110 and the pawl part 4111 of the second pawl 411 are respectively arranged at the two ends of the second pawl 411, based on the lever principle, the pawl part 4111 end of the second pawl 411 moves towards the axle center direction, and is engaged with the second ratchet wheel 413 on the second gear ring 311, and when the second automatic centrifugal shifting mechanism 41 works, the overrunning clutch 5 is in a following state, because the second planet carrier 310 is fixedly connected with the central shaft 1, and therefore, the power is transmitted to the second planet carrier 310, the weight block 411 moves to the second planet carrier 312 through the second automatic transmission mechanism, and the weight block 411 moves towards the axle center wheel hub 2, and is further moved towards the axle center 2, based on the lever principle, and the second gear 421 moves towards the third gear wheel hub 2, and the end of the hub 2, and is further driven by the second gear 421, and the end of the second automatic shifting mechanism 421 moves towards the axle center, and is further, and the end of the hub 2, and is driven towards the axle center, and the axle hub 2, and is further, and is driven by the axle 2, and is further, and is driven by the speed, and is driven. So as to be meshed with a third ratchet wheel 423 on a third gear ring 321, when the third automatic centrifugal gear shifting mechanism 42 works, the second automatic centrifugal gear shifting mechanism 41 and the overrunning clutch 5 are in a following state, power is input by the central shaft 1, because the second planet carrier 310 is fixedly connected with the central shaft 1, power is transmitted to the second planet carrier 310, the second planet carrier 310 transmits power to the second gear ring 311 through the transmission of the second planet wheels 312, the second gear ring 311 and the third planet carrier 320 are integrally formed, so that the power is transmitted to the third planet carrier 320, the third planet carrier 320 transmits the power to the third gear ring 321 through the transmission of the third planet wheels 322, the third ratchet wheel 423 on the third gear ring 321 is meshed with a third pawl 421 in the hub 2, so that the power is finally transmitted to the hub 2 and is output by the hub 2, so that a third gear medium speed is realized, when the speed of the central shaft 1 is raised again, the weight block end of the first pawl 401 of the first automatic centrifugal shift mechanism 40 moves in the direction away from the central shaft under the action of centrifugal force, because the weight block 4015 and the pawl portion 4013 of the first pawl 401 are respectively arranged at the two ends of the first pawl 401, the pawl portion 4013 end of the first pawl 401 moves toward the axial direction based on the lever principle, so as to be meshed with the first ratchet 403 on the first central wheel 303, and when the first automatic centrifugal shift mechanism 40 works, the second automatic centrifugal shift mechanism 41, the third automatic centrifugal shift mechanism 42 and the overrunning clutch 5 are all in the following state, the power is input by the central shaft, and because the first planet carrier is fixed with the central shaft, the power is transmitted to the first planet carrier 300, the first planet carrier 300 transmits the power to the first central wheel 303 through the transmission of the first planet wheel 302, since the first center wheel 303 is engaged with the hub 2, power is finally transmitted to the hub 2 and power output is performed by the hub 2, thereby achieving a four-speed high speed. The single-wheel direct-drive multi-gear full-automatic transmission can reduce the requirement on pedal frequency in middle and high gears, for example: the first, second and third automatic centrifugal shifting mechanism pawls are respectively opened at 180 rpm, 80 rpm and 120 rpm, the speed ratio of the first planetary mechanism is 1:3, the speed ratio of the second and third planetary mechanisms is 1:1.5, when the input speed of the central shaft is 70 rpm, the rotating speed of the hub is the same as the input speed of the central shaft, namely 70 rpm, because the first, second and third automatic centrifugal shifting mechanism pawls are all arranged on the hub, the first, second and third automatic centrifugal shifting mechanism pawls can not be opened at the moment, the power 1:1 is output by the hub, the first gear low speed is realized, when the input speed of the central shaft reaches 80 rpm, the rotating speed of the hub also reaches 80 rpm, the second automatic centrifugal shifting mechanism pawl is opened and is meshed with the ratchet wheel of the second gear, and the second gear medium speed is realized, and when the rotating speed of the second gear is 120 rpm (80 rpm is 1.5), the rotating speed of the central shaft can be reduced, and the input speed can be reduced. When the input rotation speed of the central shaft is increased to 80 revolutions per minute again in the working state of opening the pawl of the second automatic centrifugal mechanism, the rotation speed of the hub is 120 revolutions per minute (80 revolutions per minute is 1.5 in speed ratio), the pawl of the third automatic centrifugal shifting mechanism is opened and meshed with the ratchet wheel of the third gear ring, the third gear is realized, and at the moment, the rotation speed of the third gear ring is 180 revolutions per minute (120 revolutions per minute is 1.5 in speed ratio) which is far greater than the working rotation speed of opening the pawl of the third automatic centrifugal mechanism, so that the input rotation speed of the central shaft can be reduced, namely the treading frequency can be reduced. In the operating state that the pawls of the second and third automatic centrifugal mechanisms are opened, when the input rotation speed of the central shaft is increased to 80 rpm again, the rotation speed of the hub is 180 rpm (120 rpm: 1.5), the pawls of the first automatic centrifugal shifting mechanism are opened and meshed with the ratchet wheel of the first central wheel, and at the moment, the rotation speed of the first central wheel is 240 rpm (80 rpm: 3), which is far greater than the operating rotation speed of the first automatic centrifugal mechanism that the pawls are opened by 180 rpm, so that the input rotation speed of the central shaft can be reduced, namely the treading frequency can be reduced. The automatic centrifugal gear shifting is realized by a series of improvement of the input rotating speed, the trampling frequency is reduced, the input rotating speed is improved again, and the automatic centrifugal gear shifting cycle of the higher-level automatic centrifugal gear shifting is realized again.
Example 2
The rest of the structure of the gear ring dual-center fixed single-wheel direct-drive multi-gear full-automatic transmission in the embodiment is the same as that of the embodiment 1, and the difference is that: in the embodiment 1, the number of the automatic centrifugal shifting mechanisms is three, and the overrunning clutches are arranged between the second planet carrier and the hub to realize four gears, while in the embodiment, the number of the automatic centrifugal shifting mechanisms is two, namely, compared with the embodiment 1, the second automatic centrifugal shifting mechanism in the embodiment 1 is omitted, and the overrunning clutches originally arranged between the second planet carrier and the hub are arranged at the position where the second automatic centrifugal shifting mechanism is omitted.
The working principle of the gear ring double-center-wheel fixed single-wheel direct-drive multi-gear automatic transmission in the embodiment is as follows: when the first gear is at low speed, the pawl 50 in the overrunning clutch 5 is a normally open pawl, the second gear ring 311 and the hub 2 are kept in an engaged state, the power is input by the central shaft 1, because the second planet carrier 310 is fixedly connected with the central shaft 1, the power is transmitted to the second planet carrier 310, the second planet carrier 310 transmits the power to the second gear ring 311 through the transmission of the second planet wheel 312, the overrunning clutch 5 is in a following state when the second gear ring 311 is engaged with the hub 2, the power is finally transmitted to the hub 2 and is output by the hub 2, the first gear is at low speed, along with the lifting of the speed of the central shaft 1, the balancing weight end of the third pawl 421 of the third automatic centrifugal shifting mechanism 42 moves in the direction away from the axle center under the effect of centrifugal force, because the balancing weight and the pawl end of the third pawl 421 are respectively arranged at two ends of the third pawl 421, the pawl part end of the third pawl 421 moves towards the axle center direction based on the lever principle, and is engaged with the third ratchet wheel 321 on the third gear ring 321, when the third automatic shifting mechanism 42 works, the overrunning clutch 5 is in a following state when the power is input by the central shaft 1, the second gear ring 321 is connected with the second planet carrier 321, the second planet carrier 320 is transmitted to the hub 320 through the second planet carrier 320, the power is transmitted to the hub 320 through the second carrier 320, and the second carrier 320, the power is finally transmitted to the hub 320, the power is integrally transmitted to the hub 2 through the carrier 320, and the carrier 320 is finally, and is integrally transmitted to the carrier 320 by the carrier 320, the weight block end of the first pawl 401 of the first automatic centrifugal shift mechanism 40 moves in a direction away from the axle center under the action of centrifugal force, because the weight block and the pawl of the first pawl 401 are respectively arranged at the two ends of the first pawl 401, the pawl end of the first pawl 401 moves in the axle center direction based on the lever principle, so that the first pawl end is meshed with the first ratchet 403 on the first center wheel 303, when the first automatic centrifugal shift mechanism 40 works, the third automatic centrifugal shift mechanism 42 and the overrunning clutch 5 are both in a follow-up state, power is input by the center shaft, the power is transmitted to the first planet carrier 300 due to the fact that the first planet carrier is fixed with the center shaft, the first planet carrier 300 transmits the power to the first center wheel 303 through the transmission of the first planet carrier 302, and the power is finally transmitted to the hub 2 and is output by the hub 2 due to the fact that the first center wheel 303 is meshed with the hub 2, and three-gear high speed is achieved.
In summary, the gear ring double-center-wheel fixed single-wheel direct-drive multi-gear full-automatic transmission has the advantages of compact structure, convenience in installation, high transmission efficiency, firm gear shifting and stable gear shifting, and in addition, the transmission can reduce the requirement on pedal frequency in middle and high gears, so that riding is easier.
The above-described embodiments are merely illustrative of the principles and functions of the present invention, and some of the practical examples, not intended to limit the invention; it should be noted that modifications and improvements can be made by those skilled in the art without departing from the inventive concept, and these are all within the scope of the present invention.
Claims (9)
1. The utility model provides a gear ring double-center wheel fixed single-wheel direct drive multi-gear full automatic transmission which characterized in that includes: the planetary transmission comprises a first planetary transmission, a third planetary transmission and a second planetary transmission positioned between the first planetary transmission and the third planetary transmission, each set of planetary transmission comprises a planet carrier, a gear ring, a planet wheel and a central wheel, the gear ring of the first planetary transmission is fixed with a frame, the planet carrier of the first planetary transmission is integrally formed with or fixedly connected with the central shaft, the planet carrier of the second planetary transmission is integrally formed with or fixedly connected with the central shaft, the central wheels of the first planetary transmission, the second planetary transmission and the third planetary transmission are all sleeved on the central shaft, the central wheels of the second planetary transmission and the central wheels of the third planetary transmission form a central wheel assembly, the central wheel assembly is fixed with the frame, the planet carrier of the second planetary transmission and the gear ring of the third planetary transmission are integrally formed with or fixedly connected with the central shaft, and the planet carrier of the planetary transmission is integrally formed with or fixedly connected with the central shaft, and the central wheel of the planetary transmission is arranged between the first planetary transmission and the gear ring of the first planetary transmission or between the first planetary transmission and the hub of the automatic transmission, and the planetary transmission is arranged between the first planetary transmission and the gear ring of the hub of the planetary transmission or between the first planetary transmission and the hub of the automatic transmission. The automatic centrifugal shifting mechanism comprises a pawl carrier, a ratchet wheel and at least one pawl, wherein the pawl is arranged on the pawl carrier, the pawl carrier is arranged in a hub, and the ratchet wheels of a plurality of sets of automatic centrifugal shifting mechanisms are respectively arranged on a first planetary transmission central wheel, a second planetary transmission gear ring and a third planetary transmission gear ring or respectively arranged on the first planetary transmission central wheel and the third planetary transmission gear ring.
2. The dual ring gear, dual center, fixed single wheel, direct drive, multi-speed, full automatic transmission of claim 1, wherein: the automatic centrifugal gear shifting mechanism further comprises at least one linkage piece, the pawl piece is installed on the pawl fixing frame through a first connecting piece, the linkage piece is installed on the pawl fixing frame through a second connecting piece, the pawl piece and the linkage piece are arranged at intervals in the circumferential direction, and the pawl piece comprises: the first end, the second end and the first installation department that sets up between first end and second end are equipped with the pawl portion that cooperatees with the ratchet in the inner wall department of the second end of at least one pawl, the first installation department of pawl is equipped with the first mounting hole that is used for installing first connecting piece, the link includes third end, fourth end and sets up the second installation department between third end and fourth end, the second installation department of link is equipped with the second mounting hole that is used for installing the second connecting piece, the first end of pawl and/or the fourth end of link are equipped with the balancing weight, along radial the first end limit of pawl is located the inboard of the fourth end of link, the second end limit of pawl is located the inboard of the third end of link, the third end limit of link is located the inboard of the second end of pawl, on the pawl or the link is located the mount, the spring member that is used for the initial position of pawl or pawl on the link.
3. The dual ring gear, dual center, fixed single wheel, direct drive, multi-speed, full automatic transmission of claim 1, wherein: the automatic centrifugal gear shifting mechanism further comprises at least one linkage piece, the pawl piece is installed on the pawl fixing frame through a first connecting piece, one end of the linkage piece is movably connected with one of the adjacent pawl pieces, the other end of the linkage piece is movably connected with the other adjacent pawl piece, the pawl pieces and the linkage piece are arranged at intervals in the circumferential direction, each pawl piece comprises a first end portion, a second end portion and a first installation portion arranged between the first end portion and the second end portion, a balancing weight is arranged at the first end portion of each pawl piece, a pawl portion matched with a ratchet wheel is arranged at the inner wall of the second end portion of each pawl piece, a first installation hole for installing the first connecting piece is formed in the first installation portion of each pawl piece, and an elastic piece for controlling the initial position of each pawl piece is installed on the pawl piece frame.
4. A ring gear dual center fixed single wheel direct drive multiple speed full automatic transmission as claimed in claim 2 or 3, wherein: the elastic piece is a torsion spring, a spring or a spring piece.
5. A ring gear dual center fixed single wheel direct drive multiple speed full automatic transmission as claimed in claim 2 or 3, wherein: the pawl mount includes: the pawl is mounted on the mounting seats.
6. The dual ring gear, dual center, fixed single wheel, direct drive, multi-speed, full automatic transmission of claim 2, wherein: the first connecting piece and the second connecting piece are pins.
7. The dual ring gear, dual center, fixed single wheel, direct drive, multi-speed, full automatic transmission of claim 1, wherein: the pawl piece and the linkage piece are arranged in an involute shape or an arc shape.
8. The dual ring gear, dual center, fixed single wheel, direct drive, multi-speed, full automatic transmission of claim 1, wherein: the planet carrier of the first planetary transmission is connected with the central shaft through a spline, and the planet carrier of the second planetary transmission is connected with the central shaft through a spline.
9. The dual ring gear, dual center, fixed single wheel, direct drive, multi-speed, full automatic transmission of claim 1, wherein: the center wheel assembly comprises a center wheel assembly and a hub, wherein a boss is arranged at one end of the center shaft, a bearing or a ball is arranged between the boss and a gear ring of the first planetary transmission, a bearing or a ball is arranged between the gear ring of the first planetary transmission and the hub, a tightening piece is arranged at one end of the center wheel assembly, a bearing or a ball is arranged between the center wheel assembly and the tightening piece, and a bearing or a ball is arranged between the center wheel assembly and the hub.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611193154.2A CN106763569B (en) | 2016-12-21 | 2016-12-21 | Gear ring double-center-wheel fixed single-wheel direct-drive multi-gear full-automatic transmission |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611193154.2A CN106763569B (en) | 2016-12-21 | 2016-12-21 | Gear ring double-center-wheel fixed single-wheel direct-drive multi-gear full-automatic transmission |
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| Publication Number | Publication Date |
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| CN106763569A CN106763569A (en) | 2017-05-31 |
| CN106763569B true CN106763569B (en) | 2023-05-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201611193154.2A Active CN106763569B (en) | 2016-12-21 | 2016-12-21 | Gear ring double-center-wheel fixed single-wheel direct-drive multi-gear full-automatic transmission |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107131263B (en) * | 2017-06-14 | 2023-04-07 | 张家港川梭车业有限公司 | Shaft input type three-gear inner speed changer |
| CN107588161B (en) * | 2017-10-23 | 2024-03-29 | 张家港川梭车业有限公司 | Gear ring input double-wheel drive full-automatic multi-gear transmission |
| CN108974242B (en) * | 2018-09-12 | 2024-02-13 | 昆山唐泽新能源科技有限公司 | Variable speed hub centrifugal clutch assembly and automatic internal three-speed hub |
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| CN206361100U (en) * | 2016-12-21 | 2017-07-28 | 张家港川梭车业有限公司 | A kind of double centre wheels of gear ring fix single-wheel and directly drive multi gear fully-automatic gearbox |
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| GB1090410A (en) * | 1965-05-29 | 1967-11-08 | Raleigh Industries Ltd | Epicyclic change speed gear hubs |
| DE19720796A1 (en) * | 1997-05-16 | 1998-11-19 | Bernhard Rohloff | Multi-speed gear hub for bicycles |
| CN101224783A (en) * | 2007-01-18 | 2008-07-23 | 株式会社岛野 | Hub transmission for a bicycle and method for shifting such a hub transmission |
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| CN106763569A (en) | 2017-05-31 |
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