CN107131263B - Shaft input type three-gear inner speed changer - Google Patents
Shaft input type three-gear inner speed changer Download PDFInfo
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- CN107131263B CN107131263B CN201710454467.7A CN201710454467A CN107131263B CN 107131263 B CN107131263 B CN 107131263B CN 201710454467 A CN201710454467 A CN 201710454467A CN 107131263 B CN107131263 B CN 107131263B
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- gear shifting
- pawl
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- gear
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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
- F16H3/70—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion using gears having orbital motion in which the central axis of the gearing lies inside the periphery of an orbital gear
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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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- 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
- F16H57/00—General details of gearing
- F16H57/02—Gearboxes; Mounting gearing therein
- F16H57/025—Support of gearboxes, e.g. torque arms, or attachment to other devices
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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
- F16H57/028—Gearboxes; Mounting gearing therein characterised by means for reducing vibration or noise
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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
- F16H63/00—Control outputs from the control unit to change-speed- or reversing-gearings for conveying rotary motion or to other devices than the final output mechanism
- F16H63/02—Final output mechanisms therefor; Actuating means for the final output mechanisms
- F16H63/30—Constructional features of the final output mechanisms
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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
- F16H2057/02039—Gearboxes for particular applications
- F16H2057/02043—Gearboxes for particular applications for vehicle transmissions
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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
- F16H2057/02095—Measures for reducing number of parts or components
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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
- F16H2200/003—Transmissions for multiple ratios characterised by the number of forward speeds
- F16H2200/0039—Transmissions for multiple ratios characterised by the number of forward speeds the gear ratios comprising three forward speeds
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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
- F16H2200/2002—Transmissions using gears with orbital motion characterised by the number of sets of orbital gears
- F16H2200/2005—Transmissions using gears with orbital motion characterised by the number of sets of orbital gears with one sets of orbital gears
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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
- F16H2200/2079—Transmissions using gears with orbital motion using freewheel type mechanisms, e.g. freewheel clutches
- F16H2200/2082—Transmissions using gears with orbital motion using freewheel type mechanisms, e.g. freewheel clutches one freewheel mechanisms
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Structure Of Transmissions (AREA)
Abstract
The invention discloses a shaft input type three-gear inner speed changer, comprising: center pin, wheel hub, gearshift, planetary transmission and gear shifting mechanism, planetary transmission includes: centre wheel, planet carrier, planet wheel and ring gear, be equipped with freewheel clutch between planet carrier and the wheel hub, gearshift includes: the gear shifting device comprises a gear shifting sleeve, a ratchet wheel, a pawl piece frame and at least one pawl piece, wherein 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 a planet carrier, the pawl piece frame is integrally formed or fixedly connected with a gear ring, the ratchet wheel comprises a first ratchet wheel arranged in a wheel hub and a second ratchet wheel arranged on the gear shifting sleeve, the pawl piece comprises a first end part, a second end part and an intermediate installation part, a first pawl part matched with the first ratchet wheel is arranged at the first end part, and a second pawl part matched with the second ratchet wheel is arranged at the second end part, so that noise and resistance are greatly reduced.
Description
[ technical field ] A method for producing a semiconductor device
The invention relates to the technical field of bicycles, in particular to a shaft input type three-gear inner speed changer.
[ background of the invention ]
Referring to fig. 1 and 2, fig. 1 discloses a three-gear internal transmission in the prior art, which includes: the central shaft 1 ', the hub 2', the gear shifting sleeve 3 'arranged between the central shaft 1' and the hub 2 ', the planetary transmission 4', the gear shifting mechanism 5 ', the power input member 6' and three sets of overrunning clutches, wherein the planetary transmission 4 'comprises a planet carrier 40', a planet wheel 41 ', a center wheel 42' and a ring gear 43 ', the gear shifting mechanism 5' comprises a gear shifting rod 50 'and a fixing rod 51', a first bearing 60 'is arranged between the power input member 6' and the hub 2 ', a second bearing 61' is arranged between the power input member 6 'and the central shaft 1', the three sets of overrunning clutches are respectively a first overrunning clutch 70 arranged between the planet carrier 40 'and the hub 2', a second overrunning clutch 71 arranged between the ring gear 43 'and the hub 2', and a third overrunning clutch 72 arranged between the power input member 6 'and the hub 43', and the operating principle of the internal transmission is as follows: the central shaft 1 ' is fixed with the frame, power is input by the power input element 6 ', the shift sleeve 3 ' is moved to close the second overrunning clutch 71 ' to enable the gear ring 43 ' and the hub 2 ' to be in a disengaged state at low speed, power is input by the power input element 6 ', the power input element 6 ' is meshed with the gear ring 43 ' through the third overrunning clutch 72 ', the gear ring 43 ' rotates, the gear ring 43 ' transmits power to the planet carrier 40 ' through the transmission of the planet wheel 41 ', the planet carrier 40 ' is meshed with the hub 2 ' through the first overrunning clutch 70 ', the power is finally transmitted to the hub 2 ' and is output by the hub 2 ', the shift sleeve 3 ' is moved to open the second overrunning clutch 71 ' to enable the gear ring 43 and the hub 2 to be in a meshed state at medium speed, and the first overrunning clutch 70 ' is in a following state at the moment, the power is input by the power input element 6 ', the power input element 6 ' is engaged with the gear ring 43 ' through the third overrunning clutch 72 ', so the gear ring 43 ' rotates, the gear ring 43 ' is engaged with the hub 2 ' through the second overrunning clutch 71 ', so the power is finally transmitted to the hub 2 ' and is output by the hub 2 ', the gear shift sleeve 3 ' is moved to enable the gear ring 43 ' and the hub 2 ' to be in an engaged state at the high gear, one end of the gear shift sleeve 3 ' is connected with the planet carrier 40 ' through the spline, the other end of the gear shift sleeve 3 ' is connected with the power input element 6 ' through the spline, the first overrunning clutch 70 ' and the third overrunning clutch 72 ' are both in a follow-up state at the high gear, the power is input by the power input element 6, and the gear shift sleeve 3 ' is connected with the power input element 6 ' through the spline, so the gear shift sleeve 3 rotates, since the gear shifting sleeve 3 'is connected with the planet carrier 40' through the spline, the planet carrier 40 'rotates, the planet carrier 40' transmits power to the ring gear 43 'through the transmission of the planet gear 41', and since the ring gear 43 'is meshed with the hub 2', the power is finally transmitted to the hub 2 'and is output by the hub 2'.
The three-gear inner transmission has the defects that: 1. the inner speed changer uses three sets of overrunning clutches, so that the structure of the whole inner speed changer is complex, and the noise and the resistance of the inner speed changer are high; 2. the inner speed changer adopts a structure that a central shaft is fixed with a frame, so that the weight of a rider and the weight of a bicycle body are concentrated on a second bearing or a second ball positioned between a power input shaft and the central shaft, and the second bearing or the second ball is seriously abraded and has large resistance.
[ summary of the invention ]
To solve the above problems, an object of the present invention is to provide a shaft input type three speed internal transmission having a simple structure, less overrunning clutch usage, and less bearing or ball wear.
In order to realize the purpose, the invention adopts the technical scheme that: an input-shaft, three speed internal transmission comprising: center pin, wheel hub and set up gearshift, planetary transmission and the mechanism of shifting gears between center pin and wheel hub, the center pin is power input spare, wheel hub is power output spare, planetary transmission includes: center wheel, planet carrier, planet wheel and ring gear, the center wheel cover is located on the center pin and is fixed mutually with the frame, be equipped with freewheel clutch between planet carrier and the wheel hub, gearshift includes: the gear shifting sleeve comprises a gear shifting sleeve, a ratchet wheel, a pawl member frame and at least one pawl member arranged on the pawl member frame, wherein 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 planet carrier and the gear shifting sleeve synchronously rotate, an elastic member used for controlling the initial position of the pawl member is arranged on the pawl member frame, the pawl member frame and a gear ring are integrally formed or fixedly connected, the gear shifting sleeve is arranged on a central shaft and is in sliding connection with the central shaft, the gear shifting sleeve is driven by a gear shifting mechanism to axially move, the gear shifting sleeve radially and synchronously rotates with the central shaft, the ratchet wheel comprises a first ratchet wheel arranged in a wheel hub and a second ratchet wheel arranged on the outer circumferential surface of the gear shifting sleeve, the pawl member 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, the first end part is provided with a first pawl part matched with the second pawl part.
Preferably, the shaft input type three-gear inner transmission is further configured as follows: the overrunning clutch comprises an overrunning pawl and an overrunning ratchet wheel, wherein one of the overrunning pawl and the overrunning ratchet wheel is arranged on the planet carrier, and the other one of the overrunning pawl and the overrunning ratchet wheel is arranged in the hub.
Preferably, an axle input type three-gear inner transmission in the invention is further configured as follows: 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, the shaft input type three-gear inner transmission is further configured as follows: the two ends of the wheel hub are respectively provided with an end cover fixed with the frame, the end covers are connected with the central shaft through balls or bearings, and the end covers are connected with the wheel hub through balls or bearings.
Preferably, an axle input type three-gear inner transmission in the invention is further configured as follows: the elastic piece is a spring, a torsion spring or a spring sheet.
Preferably, an axle input type three-gear inner transmission in the invention is further configured as follows: the center wheel and the end cover are integrally formed.
Preferably, the shaft input type three-gear inner transmission is further configured as follows: 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, an axle input type three-gear inner transmission in the invention is further configured as follows: the outer circumference of the gear shifting sleeve comprises a spline section, a ratchet section, a cylindrical section and a conical section, and a cavity is formed between one end of the conical section of the gear shifting sleeve and the end cover.
Preferably, an axle input type three-gear inner transmission in the invention is further configured as follows: the pawl frame is arranged in a circular ring shape, a plurality of openings are formed in the pawl frame, and the pin penetrates through the middle installation portion of the pawl to install the pawl in the openings.
Preferably, an axle input type three-gear inner transmission in the invention is further configured as follows: the gear shifting sleeve is connected with the central shaft through a spline.
Compared with the prior art, the invention has the following beneficial effects: compared with the prior art, the shaft input type three-gear inner speed changer only uses one set of overrunning clutches, the using number of the overrunning clutches is greatly reduced, and therefore noise and resistance are reduced.
[ description of the drawings ]
FIG. 1 is a cross-sectional schematic illustration of a prior art three speed internal transmission.
FIG. 2 is an exploded schematic view of a prior art three speed internal transmission.
FIG. 3 is a schematic front view of the shaft input type three speed internal transmission of the present invention.
FIG. 4 is a schematic cross-sectional view of the shaft-input three speed internal transmission of the present invention.
FIG. 5 is an exploded schematic view of the shaft input type three speed internal transmission of the present invention.
In fig. 1 and 2: 1 ', a central shaft, 2 ', a hub, 3 ', a gear shifting sleeve, 4 ', a planetary transmission, 40 ', a planetary carrier, 41 ', a planetary gear, 42 ', a central wheel, 43 ', a gear ring, 5 ', a gear shifting mechanism, 50 ', a gear shifting rod, 51 ', a fixing rod, 6 ', a power input piece, 60 ', a first bearing, 61 ', a second bearing, 70 ', a first overrunning clutch, 71 ', a second overrunning clutch, 72 ' and a third overrunning clutch.
In fig. 3 to 5: 1. a central shaft, 10, an oval sliding groove, 2, a hub, 3, a gear shift mechanism, 30, a gear shift sleeve, 300, a first butt joint portion, 301, a spline portion, 302, a ratchet portion, 303, a cylindrical portion, 304, a conical portion, 305, a cavity, 31, a pawl holder, 310, an elastic member, 311, an opening, 32, a first ratchet, 33, a second ratchet, 34, a pawl, 340, a first end portion, 3400, a first pawl portion, 341, a second end portion, 3410, a second pawl portion, 342, an intermediate mounting portion, 4, a planetary transmission, 40, a central wheel, 41, a planet carrier, 410, a second butt joint portion, 42, a planet wheel, 43, a ring gear, 5, a shift mechanism, 50, a shift lever, 51, a fixing rod, 52, a return spring, 6, a first end cover, 60, a first bearing, 61, a second bearing, 7, a second end cover, 70, a third bearing, 71, a fourth bearing, 8, an overrunning clutch, 80, a ratchet, 81, and a pawl.
[ detailed description ] embodiments
A single wheel drive three speed transmission according to the present invention is described in further detail below with reference to specific embodiments.
Referring to fig. 3 to 5, a shaft input type three speed inner transmission includes: center pin 1, wheel hub 2 and set up gearshift 3, planetary transmission 4 and the gearshift 5 between center pin 1 and wheel hub 2, center pin 1 is the power input spare, wheel hub 2 is the power output spare, the one end of wheel hub 2 is equipped with first end cover 6, be connected through first bearing 60 between first end cover 6 and the wheel hub 2, be connected through second bearing 61 between first end cover 6 and the center pin 1, the other end of wheel hub 2 is equipped with second end cover 7, be connected through third bearing 70 between second end cover 7 and the wheel hub 2, be connected through fourth bearing 71 between second end cover 7 and the center pin 1, first end cover 6 and second end cover 7 are fixed mutually with the frame respectively, and of course in other embodiments, also can change the bearing into the ball.
The planetary transmission 4 includes: the hub comprises a central wheel 40, a planet carrier 41, a planet wheel 42 and a gear ring 43, wherein the central wheel 40 is sleeved on a central shaft 1 and is integrally formed with a first end cover 6, an overrunning clutch 8 is arranged between the planet carrier 41 and a hub 2, the overrunning clutch 8 comprises an overrunning pawl 80 and an overrunning ratchet 81, in the embodiment, the overrunning pawl 80 is arranged on the planet carrier 41, the overrunning ratchet 81 is arranged in the hub 2, of course, in other embodiments, the ratchet can also be arranged on the planet carrier, and the pawl can also be arranged in the hub, so that the invention can be realized.
The shift mechanism 3 includes: the shift collar 30, the pawl holder 31, the first ratchet 32 disposed in the hub 2, the second ratchet 33 disposed on the outer circumferential surface of the shift collar 30, and the two pawls 34 mounted on the pawl holder 31, wherein one end of the shift collar 30 is provided with a first docking portion 300, one end of the carrier 41 is provided with a second docking portion 410 engaged with the first docking portion 300, and when the first docking portion 300 is docked with the second docking portion 410, the carrier 41 and the shift collar 30 rotate synchronously. The pawl holder 31 and the gear ring 43 are integrally formed, the shift sleeve 30 is sleeved on the central shaft 1 and is connected with the central shaft 1 in a sliding and positioning manner through splines, the shift sleeve 30 is driven by the gear shifting mechanism 5 to move axially, the pawl 34 comprises a first end portion 340, a second end portion 341 and an intermediate mounting portion 342 located between the first end portion 340 and the second end portion 341, the first end portion 340 is provided with a first pawl portion 3400 matched with the first ratchet 32, and the second end portion 341 is provided with a second pawl portion 3410 matched with the second ratchet 33. The intermediate mounting portion 342 is provided with a mounting circular hole, the pawl frame 31 is disposed in a circular ring shape, the pawl frame 31 is provided with two openings 311, and a pin passes through the mounting circular hole of the pawl 34 to mount the pawl 34 in the openings 311. The outer circumferential surface of the shift collar 30 includes a spline section 301, a ratchet section 302, a cylindrical section 303 and a conical section 304, a cavity 305 is provided between one end of the conical section 304 and the second end cap 7, and the ratchet section 302 is provided at the position of the second ratchet 33.
The shift mechanism 5 includes shift lever 50, dead lever 51 and reset spring 52, shift lever 50 axial is worn to locate in the center pin 1 and can be for center pin 1 to make axial displacement, dead lever 51 radially wears to locate in the shift sleeve 30 and forms relative rotation with shift sleeve 30, shift lever 50 is perpendicular setting with dead lever 51, be equipped with on the center pin 1 with dead lever 51 matched with oval spout 10, reset spring 52 sets up between shift sleeve 30 and fourth bearing 71. The working principle of the gear shifting mechanism 5 is as follows: the shift lever 50 is axially moved, the shift lever 50 abuts against the fixed rod 51, thereby driving the shift sleeve 30 to axially move relative to the central shaft 1, and the return spring 52 functions to restore the shifted shift sleeve 30 to the original position.
The working principle of the shaft input type three-gear internal transmission is as follows: at low gear, the shift lever 50 is axially moved to position the ratchet segment 302 of the shift sleeve 30 at the position of the pawl 34, when the ratchet segment 302 of the shift sleeve 30 is engaged with the pawl 34 and the ratchet segment 302 is engaged with the pawl 34, the second ratchet wheel 33 of the shift sleeve 30 is engaged with the second pawl portion 3410 of the pawl 34, the first pawl portion 3400 of the pawl 34 is disengaged from the first ratchet wheel 32 in the hub 2, power is input from the central shaft 1 to rotate the shift sleeve 30, the second ratchet wheel 33 of the shift sleeve 30 is engaged with the second pawl portion 3410 of the pawl 34, the pawl 34 is disposed on the pawl carrier 31 to rotate the pawl carrier 31, the ring gear 43 is synchronously rotated due to the integral formation of the carrier 31 and the ring gear 43, the ring gear 43 transmits power to the planet carrier 41 through the transmission of the planet gear 42, and the planet carrier 41 is engaged with the hub 2 through the overrunning clutch, so that power is finally transmitted to the hub 2 and the hub 2 is output. At the middle gear, the shift lever 50 is axially moved to enable the cylindrical section 303 of the shift sleeve 30 to be located at the position of the pawl member 34, a part of the spline section 301 of the shift sleeve 30 is connected with the internal spline 410 of the planet carrier, at the same time, the cylindrical section of the shift sleeve 30 is matched with the pawl member 34, when the cylindrical section of the shift sleeve 30 is matched with the pawl member 34, the second ratchet wheel 33 of the shift sleeve 30 is in a disengagement state with the second pawl portion 3410 of the pawl member 34, meanwhile, the first pawl portion 3400 on the pawl member 34 is in a disengagement state with the first ratchet wheel 32 in the hub 2, the internal spline at one end of the planet carrier 41 is meshed with a part of the external spline at one end of the shift sleeve 30, power is input from the central shaft 1 to drive the shift sleeve 30 to rotate, the planet carrier 41 is driven to rotate due to the spline connection between the shift sleeve 30 and the planet carrier 41, and the planet carrier 41 is meshed with the hub 2 through the overrunning clutch 8, so that the power is finally transmitted to the hub 2 and is output. In high gear, the shift lever 50 is moved axially, the shift sleeve 30 is moved axially synchronously, so that the conical section 304 of the shift sleeve 30 moves past the second end of the pawl 34, the second end of the pawl 34 is located in the cavity 305 between the shift sleeve 30 and the end cover, the spline section 301 of the shift sleeve 30 is completely connected with the internal spline 410 of the planet carrier, the second ratchet 33 of the shift sleeve 30 is in a disengaged state with the second pawl 3410 of the pawl 34, the first pawl 3400 of the pawl 34 is in an engaged state with the first ratchet 32 in the hub 2 under the action of the elastic member 310, the internal spline at one end of the planet carrier 41 is engaged with the external spline at one end of the shift sleeve 30, the overrunning clutch is in a follow-up state at high gear, power is input from the central shaft 1 to drive the shift sleeve 30 to rotate, the planet carrier 41 is driven to rotate due to the spline connection between the shift sleeve 30 and the planet carrier 41, the planet carrier 41 transmits power to the ring gear 43 through transmission of the planet carrier 42, the planet carrier 31 is integrally formed with the ring gear 43, and the ratchet carrier 34 is finally transmitted to the first ratchet 3402 to output by the ratchet 34.
In summary, the inner speed changer greatly reduces noise and resistance, in addition, end covers at two ends of the inner speed changer are fixed with a frame, the weight of a rider and the weight of a vehicle body are completely pressed on the end covers through the transmission of the first bearing and the third bearing, so that the pressure bearing of the second bearing and the fourth bearing is smaller, and the abrasion of the second bearing and the fourth bearing is 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 (10)
1. A shaft-input, three-speed internal transmission, comprising: center pin, wheel hub and set up gearshift, planetary transmission and the mechanism of shifting gears between center pin and wheel hub, the center pin is power input spare, wheel hub is power output spare, planetary transmission includes: center wheel, planet carrier, planet wheel and ring gear, the center wheel cover is located on the center pin and is fixed mutually with the frame, be equipped with freewheel clutch between planet carrier and the wheel hub, gearshift includes: the gear shifting sleeve comprises a gear shifting sleeve, a ratchet wheel, a pawl member frame and at least one pawl member arranged on the pawl member frame, wherein 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 planet carrier and the gear shifting sleeve synchronously rotate, an elastic member used for controlling the initial position of the pawl member is arranged on the pawl member frame, the pawl member frame and a gear ring are integrally formed or fixedly connected, the gear shifting sleeve is arranged on a central shaft and is in sliding connection with the central shaft, the gear shifting sleeve is driven by a gear shifting mechanism to axially move, the gear shifting sleeve radially and synchronously rotates with the central shaft, the ratchet wheel comprises a first ratchet wheel arranged in a wheel hub and a second ratchet wheel arranged on the outer circumferential surface of the gear shifting sleeve, the pawl member 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, the first end part is provided with a first pawl part matched with the second pawl part.
2. The shaft-input, three-speed internal transmission of 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 planet carrier, and the other one of the overrunning pawl and the overrunning ratchet wheel is arranged in the wheel hub.
3. The shaft-input, three-speed internal transmission of 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.
4. The shaft-input, three-speed internal transmission of claim 1, wherein: the two ends of the wheel hub are respectively provided with an end cover fixed with the frame, the end covers are connected with the central shaft through balls or bearings, and the end covers are connected with the wheel hub through balls or bearings.
5. The shaft-input, three-speed internal transmission of claim 1, wherein: the elastic piece is a spring, a torsion spring or a spring sheet.
6. The shaft-input, three-speed internal transmission of claim 1, wherein: the center wheel and the end cover are integrally formed.
7. The shaft-input, three-speed internal transmission of 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.
8. The shaft-input, three-speed internal transmission of claim 4, wherein: the outer circumferential surface of the gear shifting sleeve comprises a spline section, a ratchet wheel section, a cylindrical section and a conical section, and a cavity is formed between one end of the conical section of the gear shifting sleeve and the end cover.
9. The shaft-input, three-speed internal transmission of 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 pin penetrates through the middle mounting portion of the pawl to mount the pawl in the openings.
10. The shaft-input, three-speed internal transmission of claim 1, wherein: the gear shifting sleeve is connected with the central shaft through a spline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710454467.7A CN107131263B (en) | 2017-06-14 | 2017-06-14 | Shaft input type three-gear inner speed changer |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710454467.7A CN107131263B (en) | 2017-06-14 | 2017-06-14 | Shaft input type three-gear inner speed changer |
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| Publication Number | Publication Date |
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| CN107131263A CN107131263A (en) | 2017-09-05 |
| CN107131263B true CN107131263B (en) | 2023-04-07 |
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| CN201710454467.7A Active CN107131263B (en) | 2017-06-14 | 2017-06-14 | Shaft input type three-gear inner speed changer |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| 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 |
| CN112413067B (en) * | 2020-11-23 | 2022-02-11 | 八方电气(苏州)股份有限公司 | Multi-gear adjusting speed change mechanism of middle-placed motor and middle-placed motor |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB850613A (en) * | 1957-12-16 | 1960-10-05 | John William Felix | Improvements in and relating to epicyclic variable speed gearing |
| FR1583774A (en) * | 1968-03-19 | 1969-12-05 | ||
| DE3940919A1 (en) * | 1989-12-12 | 1991-06-13 | Fichtel & Sachs Ag | DRIVE HUB WITH CONTINUOUSLY ADJUSTABLE FRICTION GEARBOX |
| CN2389105Y (en) * | 1999-08-20 | 2000-07-26 | 黄志伟 | Speed-varied rear axle for bicycle |
| CN103569306B (en) * | 2013-11-19 | 2015-05-06 | 李激初 | Inner speed changer of bicycle |
| CN204190553U (en) * | 2014-07-21 | 2015-03-04 | 严振华 | The wheel hub motor of the automobile-used variable deceleration ratio of electrical salf-walking |
| CN105156664B (en) * | 2015-08-18 | 2017-04-12 | 李激初 | Multi-gear transmission and center wheel pawl installation structure used in same |
| CN106005234B (en) * | 2016-07-07 | 2018-06-01 | 张家港川梭车业有限公司 | A kind of gearshift |
| CN106763570B (en) * | 2016-12-21 | 2023-07-14 | 张家港川梭车业有限公司 | Single-wheel direct-drive multi-gear full-automatic transmission with fixed central wheel |
| CN106763569B (en) * | 2016-12-21 | 2023-05-26 | 张家港川梭车业有限公司 | Gear ring double-center-wheel fixed single-wheel direct-drive multi-gear full-automatic transmission |
| CN206802215U (en) * | 2017-06-14 | 2017-12-26 | 张家港川梭车业有限公司 | A kind of axle input type three keeps off internal speed changer |
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