CN201254264Y

CN201254264Y - Fully-automatic speed-changer

Info

Publication number: CN201254264Y
Application number: CNU2008200155498U
Authority: CN
Inventors: 卢菊财
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-09-12
Filing date: 2008-09-12
Publication date: 2009-06-10
Anticipated expiration: 2018-09-12

Abstract

The utility model relates to a full automatic gearbox, radically solving the problems that bearings are damaged and the speed-change flexibility of internal transmission parts is affected due to rather big axial force borne by the existing gearbox, and the gearbox comprises a hollow axle, a casing, a gear lever assembled in a hollow axle cavity, as well as a centrifugal mechanism, a rotational gear train and a speed-change mechanism assembled on the hollow axle, and adopts the technical points that: the casing employs an integral structure, a positioning spigot is arranged at the joint part between an end cap of the casing and the casing, and a positioning table is respectively disposed at the contact parts between a left ratchet wheel and the casing and between a right ratchet wheel and the casing. The utility model has advantages of reasonable structural design, simplified outside shell structure, ensured speed-change flexibility of internal transmission parts of the casing, and extended service life of the gearbox, and is suitable for being assembled on bicycles, electric motor cars and the like.

Description

Full automatic transmission gerbox

Technical field

The utility model relates to a kind of drive wheels full automatic transmission gerbox, is specially adapted to drive wheels such as bicycle, battery-driven car.

Background technology

At present, the change-speed box that is used for drive wheels such as bicycle, battery-driven car is of a great variety, the inventor has applied for and has obtained multinomial patent through continuous research, as notification number is CN2385966Y a kind of " automatic transmission with hydraulic torque converter ", this change-speed box is characterised in that: centrifugal mechanism links to each other with the parts that rotate train by a cover sun and planet gear, and the parts of described rotation train are arbitrary in ratchet, housing and the end cap.Planetary wheel is directly installed on the parts that rotate train by gear wheel shaft, centrifugal mechanism be installed in planetary wheel mating teeth circle on, or on the parts that rotate train, have and planetary wheel mating teeth circle, on the sun wheel that centrifugal mechanism is installed in planetary wheel is meshed.Centrifugal mechanism is to be fixed on the mounting base on the gear ring and to be hinged on the pedestal and the flyball shift fork consubstantiality.This change-speed box with the speed change centrifugal mechanism by sun and planet gear with after the parts that rotate train link to each other, make the rotating speed of centrifugal mechanism obtain changing, the actual speed of centrifugal mechanism is different from the rotating speed of bicycle quick and train miscellaneous part thereof, so the change of speed is more flexible, bicycle walking is laborsaving; Notification number is a kind of " transmission system " of CN2448616Y, this device is characterised in that: mobile device is housed in the center shaft, what be fixedly linked with mobile device is a lining, movable spline is contained in the lining, ratchet also is housed on center shaft, and Planetary gear seat and gear ring are equipped with baulk ring between Planetary gear seat and the gear ring, the baulk ring cylindrical has draw-in groove, be installed in gear ring in very heavy being meshed.Have groove on the ratchet, the edge of movable spline has projection, and both are meshed.This concavo-convex combination can make spline no matter be stuck in which groove in speed change, that is to say in which speed district all reliable and stablely, can not be shifted voluntarily; Notification number is a kind of " automatic transmission with hydraulic torque converter " of CN2345446Y, this change-speed box is characterised in that: the speed change pull bar is housed in hollow shaft, hollow shaft is with Cenbrifugal shaft sleeve outward, have a groove on the hollow shaft, be installed with the Cenbrifugal shaft sleeve of bearing pin connection center shaft in the groove, adjustable bolt is equipped with in the hollow shaft end, in the hollow axocoel elastic component is housed, the two ends of elastic component connect adjustable bolt and speed change pull bar respectively, utilize adjustable bolt to adjust pulling force and pressure, make resetting of speed change pull bar reliable, gearshift performance is stable.The inventor once be assembled into above-mentioned three patented technologies have hollow shaft, the full automatic transmission gerbox of the transmission system of speed change pull bar, flyball centrifugal mechanism, ratchet and activity spline fitted, it is speed change pull bar crank motion under the drive of flyball centrifugal mechanism in the hollow shaft, speed change pull bar drive activity spline is in each groove of ratchet, be that each retaining district moves, realize the speed change purpose.It is bigger that but the inventor produces and assemble the axial force that the rotatable parts in the discovery casing are subjected in the use in practice, left and right bearing is fragile under the effect of this bigger axial force, after the permanent wearing and tearing, can have influence on the speed change alerting ability of inner driving parts, cause the gearshift performance of change-speed box to reduce.Existing in addition change-speed box outer hull and speed change centnifugal force gear case body branch usually are arranged, so there is the complicated shortcoming of assembling.Based on above-mentioned 2 points, existing full automatic transmission gerbox is demanded urgently improving.

The utility model content

The purpose of this utility model is for a kind of full automatic transmission gerbox of reasonable in design is provided, fundamentally solve that existing change-speed box exists and cause the problem that bearing is impaired, influence the speed change alerting ability of inner driving parts to power, simplify the outer hull structure simultaneously owing to be subjected to larger axis.

The technical solution of the utility model is: this full automatic transmission gerbox comprises casing, hollow shaft, be assembled in the centrifugal mechanism on the hollow shaft, rotate train, speed-changing mechanism, centrifugal mechanism comprise the Cenbrifugal shaft sleeve that is assembled on the hollow shaft and with the flyball of shift fork consubstantiality, rotate train and comprise a left side that is assembled in the casing, right ratchet, sun and planet gear, speed change pull bar one end that is assembled in the hollow axocoel is connected with Cenbrifugal shaft sleeve, the other end is connected with movable spline in the speed-changing mechanism, the groove of the ratchet of installing on the edge projection of movable spline and the hollow shaft is meshed, its technical essential is: described casing adopts one-piece construction, the end cap of described casing is provided with positioning spigot at the interface with described casing, a described left side, right ratchet is provided with positioning table respectively in the contact position with described casing.

Advantage of the present utility model and the good effect that is produced are: because the utility model has adopted the casing of one-piece construction, thus simplified the exterior housing structure of change-speed box, can an extrusion forming, in the time of saving in material, reduced assembly error.The end cap of casing is provided with positioning spigot at the interface with casing, and left ratchet in the rotation train and the contact position in right ratchet and the casing are provided with positioning table respectively.Positioning spigot and positioning table have played axial location that limits drive disk assembly and the effect that improves concentricity, weakened the axial force that left and right bearing bears to a great extent, reduced bearing degree of wear in the course of the work, guarantee the speed change alerting ability of the inner driving parts of casing simultaneously, prolonged the service life of change-speed box.

Description of drawings

Below in conjunction with accompanying drawing the utility model is further described.

Fig. 1 is an inner structure cutaway view of the present utility model.

Sequence number explanation among the figure: 1 cover of dust, 2 jam nuts, 3 end caps, 4 positioning spigots, 5 casings, 6 positioning tables, 7 left ratchets, 8 right ratchets, 9 positioning tables, 10 sprocket wheels, 11 ratchets, 12 hollow shafts, 13 right bearings, 14 movable splines, 15 speed change pull bars, 16 gear rings, 17 sun and planet gears, 18 gear rings, 19 flyballs, 20, shift fork, 21 Cenbrifugal shaft sleeves, 22 left bearings, 23 springs.

The specific embodiment

In conjunction with Fig. 1 the utility model is described in detail.This change-speed box comprises hollow shaft 12, and casing 5 utilizes spring 23 to be assembled in speed change pull bar 15 in hollow shaft 12 chambeies, is assembled in centrifugal mechanism on the hollow shaft 12, rotates train, speed-changing mechanism and adjusts parts such as locating element.Centrifugal mechanism comprises the Cenbrifugal shaft sleeve 21 that is assembled on the hollow shaft 12, be fixed on the mounting base on the gear ring 18 and be hinged on the pedestal and parts such as flyball 19 shift fork 20 consubstantialities.Rotating train is made of parts such as left and

right ratchet

7,8, sun and planet gear 17, gear ring 16, sprocket wheels 10.Speed change pull bar 15 1 ends that are assembled in the hollow shaft 12 are connected with Cenbrifugal shaft sleeve 21, the other end is connected with movable spline 14 in the speed-changing mechanism, the groove of the ratchet 11 of installation is meshed on the edge projection of movable spline 14 and the hollow shaft 12, speed change pull bar 15 moves back and forth in hollow shaft 12 chambeies under the leverage of the centnifugal force of flyball 19 and shift fork 20, thereby speed change pull bar 15 drive activity splines 14 are at each groove of ratchet 11, be each speed change retaining district's internal conversion, realize the speed change purpose.23 pairs of speed change pull bars 15 of spring play the effect of the buffering that resets.Hollow shaft 12 left and right two ends are provided with jam nut 2 and cover of dust 1 respectively.Wherein: casing 5 adopts one-piece construction, can an extrusion forming, the end cap 3 of casing 5 is provided with positioning spigot 4 at the interface with casing 5, between end cap 3 and the hollow shaft 12 left bearing 22 is set, being provided with of this positioning spigot 4 guaranteed the position stability of casing 5 with end cap 3, reduced the axial force of 3 pairs of left bearings 22 of end cap.Left ratchet 7 in the rotation train and right ratchet 8 are provided with positioning table 6,9 respectively with the contact position of casing 5, this positioning table 6,9 has guaranteed to rotate between the driving parts in the train and the axial location of right bearing 13, thereby has strengthened matching relationship and speed change alerting ability between the driving parts.

Claims

1, a kind of full automatic transmission gerbox, comprise casing, hollow shaft, be assembled in the centrifugal mechanism on the hollow shaft, rotate train, speed-changing mechanism, centrifugal mechanism comprise the Cenbrifugal shaft sleeve that is assembled on the hollow shaft and with the flyball of shift fork consubstantiality, rotate train and comprise a left side that is assembled in the casing, right ratchet, sun and planet gear, speed change pull bar one end that is assembled in the hollow axocoel is connected with Cenbrifugal shaft sleeve, the other end is connected with movable spline in the speed-changing mechanism, the groove of the ratchet of installing on the edge projection of movable spline and the hollow shaft is meshed, it is characterized in that: described casing adopts one-piece construction, the end cap of described casing is provided with positioning spigot at the interface with described casing, a described left side, right ratchet is provided with positioning table respectively in the contact position with described casing.