CN2431150Y - Gear type automobile automatic stepless speed change device - Google Patents

Abstract

The utility model relates to a gear type automatic stepless speed variator and the utility model is characterized in that the gear type automatic stepless speed change device comprises an input shaft of a speed variator, a center wheel, a gear ring, a planetary wheel, a planet carrier, a forward gear toothed wheel of an output shaft, a reverse gear toothed wheel of an output shaft, an output shaft of a speed variator, a reverse gear toothed wheel of an intermediate shaft, a forward gear toothed wheel of an intermediate shaft, a transmission toothed wheel of an intermediate shaft, an intermediate shaft and a casing of a transmission device. The utility model uses toothed wheels for driving a circulation mechanism to realize automatic stepless speed change; the utility model has the advantages of high transmission efficiency, large power, small size, simple structure, reasonable structure, reliable operation, long service life and low failure rate.

Description

Gear type automobile automatic stepless speed variator

The utility model relates to a kind of change-speed box, particularly a kind of gear type automobile automatic stepless speed variator.

At present, the automatic gearbox of commonplace application mainly contains two kinds of hydraulic machine automatic transmission with hydraulic torque converter and belt continuously variable automatic transmissions.Wherein the hydraulic machine automatic transmission with hydraulic torque converter is more common.Because the speed range of hydraulic torque converter (claiming turbine transformer again) is limited, is difficult to satisfy the automotive use requirement, and exists driving efficiency low, shortcomings such as bad fuel consumption.Common this change-speed box is made up of hydraulic torque converter, gear shift brake collar, gear shift sleeve, hydraulic control system, sun and planet gear etc.Thereupon, the structure complicated, volume of whole change-speed box increased, fault rate increases, cost up.Its speed-change process is by hydraulic control system, automatically controls the engagement state of gear shift brake collar and gear shift sleeve, changes the transmitting ratio of sun and planet gear, realizes having a grade automatic speed changing.

And the belt continuously variable automatic transmission normally is made up of driving pulley, driven pulley, triangle steel band (or cone belt), belt wheel diameter changing mechanism etc.Its speed-change process is by hydraulic pressure diameter changing mechanism (or centrifugal diameter changing mechanism) automatic guidance driving pulley, or the cornerite diameter of driven pulley, changes the transmitting ratio between the two-wheeled, realizes automatic stepless speed change.Because this change-speed box is frictional transmission, there is skidding exactly in its disadvantage, makes that driving efficiency is low, transmission power is less, can only use in low power range.

The purpose of this utility model is to provide a kind of and realizes automatic stepless speed change, driving efficiency height, big, the simple and reasonable gear type automobile automatic stepless speed variator of power with cycling mechanism.

The purpose of this utility model can reach by following measure: the utility model comprises input shaft, center gear, gear ring, satellite gear, pinion carrier, output shaft D Drive gear, output shaft reverse gear, transmission output shaft, tween drive shaft reverse gear, tween drive shaft D Drive gear, the tween drive shaft transmission gear, tween drive shaft, case of transmission, input shaft, transmission output shaft, tween drive shaft is loaded in the case of transmission in parallel to each other, input shaft and center gear link into an integrated entity, satellite gear, gear ring is sleeved on outside input shaft and the center gear successively, gear is fixed on the tween drive shaft, and and the engagement of the external tooth of gear ring, transmission output shaft is captiveed joint with pinion carrier, gear and gear fuse, and be fixed on the transmission output shaft, the gear gear fuses, and movable set is on tween drive shaft.

The purpose of this utility model can also reach by following measure: the centre at case of transmission is provided with abutment wall, and transmission output shaft is carried on the abutment wall.Gear ring is contained on the input shaft with ball bearing of main shaft.Input shaft, transmission output shaft, tween drive shaft are bearing on the case of transmission with ball bearing of main shaft respectively.

Structural principle scheme drawing when Fig. 1, Fig. 2 are in D Drive for the utility model;

Structural principle scheme drawing when Fig. 3 is in neutral gear for the utility model;

Structural principle scheme drawing when Fig. 4 is in reverse for the utility model.

The utility model is described in further detail below in conjunction with accompanying drawing (embodiment):

With reference to Fig. 1～Fig. 4, the utility model comprises input shaft 1, center gear 2, gear ring 3, satellite gear 4, pinion carrier 5, abutment wall 6, output shaft D Drive gear 7, output shaft reverse gear 8, transmission output shaft 9, tween drive shaft reverse gear 10, tween drive shaft D Drive gear 11, tween drive shaft transmission gear 12, tween drive shaft 13, ball bearing of main shaft 14,15, case of transmission 16, shift fork 17 etc.

Input shaft 1, transmission output shaft 9, tween drive shaft 13 are bearing on the case of transmission 16 with ball bearing of main shaft in parallel to each other: input shaft 1 is connected with center gear 2 or makes one, satellite gear 4 is sleeved on outside the center gear 2, gear ring 3 is contained on the input shaft 1 with ball bearing of main shaft, its internal tooth and satellite gear 4 engagements.Gear 12 is fixed on the tween drive shaft 13, and and the engagement of the external tooth of gear ring 3; Transmission output shaft 9 is captiveed joint with pinion carrier 5; Gear 7 can be made into one with gear 8, becomes the tower tooth, and is fixed on the output shaft 9; In order to strengthen the support stiffness of axle, be provided with abutment wall 6 at the middle part of case of transmission 16, the bearing seat of abutment wall 6 adopts the opposite opened structure, and output shaft 9 is carried in the bearing seat of abutment wall 6.It is stepped gear that gear 10 and gear 11 are made one, is linked in splined hole on the male splines of tween drive shaft 13, and can be in axial sliding.

During neutral gear, gear 10 does not all mesh with gear 7 mutually with gear 8, gear 11, the effect of gear ring 3 unfettered power, then sun and planet gear loses gearing fully, this moment, input shaft 1 can only pass through the stepped gear idle running on center gear 2, satellite gear 4, gear 3, the gear 12 driving tween drive shafts 13, and can not drive output shaft 9, thereby interrupted the transmission of power of whole drive system.

On the basis of neutral gear, make shift fork 17 reaches (going into D Drive), make cliding gear 11 and gear 7 engagements, when vehicle starting, driving engine drives input shaft 1 by power-transfer clutch, makes center gear 2 right-hand revolutions, drives satellite gear 4.Because change-speed box is in forward position, this moment, pinion carrier 5 passed to the transmitting ratio maximum of output shaft 9 successively, and resistance is little.And that gear ring 3 passes to the transmitting ratio of output shaft 9 by gear 12,11,7 successively is little, and torque reaction is little, and resistance is big.So satellite gear 4 can only be around the internal tooth rotation of gear ring 3, drive pinion carrier 5 output shafts 9 right-hand revolutions, and by gear 7,11,12 gear ring 3 is passed in torque successively, make gear ring 3 make right-hand revolution, and do corresponding acceleration by 4 pairs of pinion carriers 5 of satellite gear simultaneously, pinion carrier 5 after the acceleration drives output shaft 9 successively by gear 7,11,12, gear ring 3, satellite gear 4, pinion carrier 5 is remake further acceleration, so finish a speed change circulation, make output shaft 9 realize stepless automatic transmission.

When quickening moment of rotation greater than load and friction drag, automobile quickens with regard to automatic stepless.When load and friction drag and acceleration moment of rotation reached balance, automobile just remained on constant speed state.When the automobile upslope runs into big resistance, when perhaps engine speed slowed down, output shaft 9 rotating speeds reduced, and successively by gear 7,11,12, gear ring 3, satellite gear 4, pinion carrier 5 were done corresponding deceleration, and moment of rotation slows down along with rotating speed and increases.

No matter change-speed box is operated at a high speed or lower-speed state, the transmitting ratio between its each gear pair remains unchanged, and its speed-change process is only relevant with the rotating speed and the load friction resistance of input shaft 1, output shaft 9.So, this change-speed box in speed-change process, the transmitting ratio between need not the conversion transmission gear, as long as the control engine speed, just can be by corresponding speed change cycling mechanism, the realization automatic stepless speed change.

On the basis of neutral gear, move behind the shift fork 17, make cliding gear 10 and gear 8 engagements, then pinion carrier 5 transmitting ratio that directly passes to output shaft 9 diminishes because of the engagement of gear 8 with gear 10, and it is big that resistance becomes.And gear ring 3 passes to the transmitting ratio maximum of output shaft 9 successively by gear 12,10,8.So satellite gear 4 can only drive the rotation of gear ring 3 anticlockwise directions by the internal tooth of gear ring 3, and do the anticlockwise direction rotation by gear 12,10,8 drive pinion carriers 5 successively, do the anticlockwise direction reversing by 4 pairs of gear rings 3 of satellite gear simultaneously and quicken.

The stepless automatic transmission principle of reverse, the same with D Drive, just the drive path of the hand of rotation of output shaft and speed change cycling mechanism is different, considers the safety of reversing simultaneously, back-up speed should hang down as far as possible, and the transmitting ratio of reverse is greater than D Drive.

When change-speed box is in forward position (Fig. 1, shown in Figure 2), if gear ring 3 maintains static, center gear 2 is passed to the overall gear ratio of output shaft 9 more successively by the internal tooth of satellite gear 4, gear ring 3 by pinion carrier 5, should be equivalent to one grade of transmitting ratio of manual step change transmission, be called the starting transmitting ratio.

If gear 7 disconnects with pinion carrier 5, output shaft 9, center gear 2 maintains static.Gear 7 is successively by gear 11,12, the interior external tooth of gear ring 3, satellite gear 4, pinion carrier 5 pass to output shaft 9 overall gear ratio should greater than the starting transmitting ratio, be called the ratio that drives up, drive up than size can directly influence the acceleration capability of automobile, drive up than must greater than the starting transmitting ratio, otherwise, the change-speed box cisco unity malfunction.

When change-speed box is in the reverse position (shown in Figure 4), center gear 2 should be called reverse gear ratios greater than the starting transmitting ratio by the interior external tooth of satellite gear 4, gear ring 3, the overall gear ratio that gear 12,10,8 passes to output shaft 9 successively.

Why change-speed box can realize automatic stepless speed change, and the most important condition is exactly that output shaft 9 will have enough big moment of rotation, could pass through gear 7,11,12, gear ring 3, and satellite gear 4, pinion carrier 5 drives output shaft 9 and does corresponding acceleration.When the moment of rotation of input shaft 1 weakened, the rotating speed of output shaft 9 is also corresponding to slow down.And the starting rotating speed of output shaft 9 is the internal tooths that passed through center gear 2, satellite gear 4, gear ring 3 by engine drive input shaft 1 successively, and pinion carrier 5 passes to output shaft 9.Automobile in the process of moving, the driver is as long as the accelerator open degree of control driving engine just can be realized stepless control to the rotating speed of driving engine, and the rotating speed by corresponding transmission mechanism control output shaft 9.

The starting rotating speed of output shaft 9 adds that the speed change cycling mechanism passes to the rotating speed of pinion carrier 5, is called synthetic rotating speed.In like manner, the driving resistance of output shaft 9 adds that the speed change cycling mechanism passes to the driving resistance of pinion carrier 5, is called combination resistance.When the speed change cycling mechanism was finished a working cycle, then synthetic rotating speed will correspondingly be accelerated, and perhaps slows down, and its combination resistance also can correspondingly increase, and perhaps reduces.

When the rotary torque of output shaft 9 continues to increase (greater than load and friction drag), the then synthetic also corresponding quickening of rotating speed.But be not unlimited fast, because when the accelerator open degree of car engine mechanism reached greatest limit, then the rotating speed of automotive engine and moment of torsion also reached greatest limit.And automobile in the process of moving, except load and friction drag, also has air resistance.When automobile travelled at a slow speed, air resistance was very little, but during galloping, it is big that air resistance becomes, and will become main resistance.According to aerodynamic principle as can be known: automobile driving speed is fast more, air resistance big more (being that air resistance is directly proportional with automobile driving speed).So, when the power of automotive engine and rotating speed moment of torsion reach greatest limit, the greatest limit of automobile driving speed just.

When automobile need quicken, at first the rotary torsion of output shaft 9 must be greater than load and resistance.When the rotary torsion of output shaft 9 during less than load and resistance, the rotating speed of output shaft 9 slows down because of the effect of resistance, and until its rotary torsion can overcome maintenance constant speed in the scope of load and resistance.

The utility model has following advantage compared to existing technology: with gear drive circulation mechanism Realize automatic infinitely variable speeds, the transmission efficiency height, power is big, and volume is little, and is simple and reasonable, Reliable operation, the life-span is long, and fault is few, and cost is low.

Claims (4)

1, a kind of gear type automobile automatic stepless speed variator, it is characterized in that: comprise input shaft (1), center gear (2), gear ring (3), satellite gear (4), pinion carrier (5), output shaft D Drive gear (7), output shaft reverse gear (8), transmission output shaft (9), tween drive shaft reverse gear (1 0), tween drive shaft D Drive gear (11), tween drive shaft transmission gear (12), tween drive shaft (13), case of transmission (16), input shaft (1), transmission output shaft (9), tween drive shaft (13) is loaded in the case of transmission (16) in parallel to each other, input shaft (1) links into an integrated entity with center gear (2), satellite gear (4), gear ring (3) is sleeved on outside input shaft (1) and the center gear (2) successively, gear (12) is fixed on the tween drive shaft (13), and and the engagement of the external tooth of gear ring (3), transmission output shaft (9) is captiveed joint with pinion carrier (5), gear (7) fuses with gear (8), and be fixed on the transmission output shaft (9), gear (10) gear (11) fuses, and movable set is on tween drive shaft (13).

2, change-speed box according to claim 1 is characterized in that: be provided with abutment wall (6) in the centre of case of transmission (16), transmission output shaft (9) is carried on the abutment wall (6).

3, change-speed box according to claim 1 is characterized in that: gear ring (3) is contained on the input shaft (1) with ball bearing of main shaft.

4, change-speed box according to claim 1 is characterized in that: input shaft (1), transmission output shaft (9), tween drive shaft (13) are bearing on the case of transmission (16) with ball bearing of main shaft respectively.

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