Summary of the invention
The present invention is just in order to comply with the demand and requirement proposes.Technical problem to be solved by this invention is: a kind of automatic transmission is provided, with the speed change level with the least possible and shifting element, forward gear as much as possible and at least one are reversed gear and carried out powershift, not only axial length is short for this speed changer, compact structure, efficiency are high, and by gear more and that more close steps distributes is provided, further reduces oil consumption and improved the dynamic performance of travelling of vehicle.
For solving the problems of the technologies described above, technological scheme of the present invention is: a kind of automatic transmission, comprising: be arranged side by side two axle systems in a shared mission case, three commutating tooth wheels, three planetary gear set and several gear shift units; Described the first axle system is positioned at back flow side, comprises the first axle, the 3rd axle, the 4th axle, the 5th axle and the 6th axle, and power is from described the first axle input; Described the second axle system is positioned at slave end, comprises the second axle, the 7th axle, the 8th axle, the 9th axle and the tenth axle, and power is from described the second axle output; Described the 6th axle is connected by the first commutating tooth wheels with described the tenth axle, and the first commutating tooth wheels comprise the first driving gear and the first driven gear, and described the first driving gear is fixed on described the 6th axle, and described the first driven gear is fixed on described the tenth axle; Described the 4th axle is connected by the second commutating tooth wheels with the 7th axle, and the second commutating tooth wheels comprise the second driving gear and the second driven gear, and described the second driving gear is fixed on described the 4th axle, and described the second driven gear is fixed on described the 7th axle; Described the 5th axle is connected by the 3rd commutating tooth wheels with the 8th axle, and described the 3rd commutating tooth wheels comprise the 3rd driving gear and the 3rd driven gear, and described the 3rd driving gear is fixed on described the 5th axle, and described the 3rd driven gear is fixed on described the 8th axle; Described the first planetary gear set is arranged on the first axle and fastens, and comprises the first sun gear, the first gear ring and the first planet carrier, and described the first sun gear is fixed on described the 3rd axle; Described the second planetary gear set is arranged on the second axle and fastens, and comprises secondary sun wheel, the second gear ring and the second planet carrier, and described the second gear ring is fixed on described the 9th axle; Described third planet gear train is arranged on the second axle and fastens, and comprises the 3rd sun gear, the 3rd gear ring and third planet frame; Described the first axle is fixedly connected with described the first planet carrier; Described the second axle is fixedly connected with described third planet frame; Described the 4th axle is fixedly connected with described the first gear ring; Described the 7th axle is fixedly connected with described secondary sun wheel; Described the 8th axle is fixedly connected with described the 3rd sun gear; Described the second axle is fixedly connected with described the second planet carrier; Described the tenth axle is fixedly connected with described the 3rd gear ring; Described gear shift unit comprises: be connected to the first break between described the first sun gear and described mission case; Be connected to described the 5th axle and described the first planet carrier between first clutch; Be connected to the second clutch between described the 8th axle and described the second gear ring; Be connected to the 3rd clutch between described the 4th axle and described the 5th axle; Be connected to the four clutches between described the 6th axle and described the first sun gear; Set up rigidly connected the 5th clutch for two that control in described the 3rd sun gear, described the 3rd gear ring and described third planet frame.
Preferably, described the 5th clutch is connected between described the 8th axle and described the second axle.
Preferably, described the 5th clutch is connected between described the tenth axle and described the second axle.
Preferably, the arbitrary axle in described axle system is connected with a motor.
Preferably, described the 5th axle or the 8th axle are connected with a motor.
Preferably, comprise: hydraulic system, described hydraulic system comprises hydraulic power unit, hydraulic power control and performance element and signaling control unit, described hydraulic power unit comprises that an electric pump and one are by engine-driven mechanical pump, the suction passage of described electric pump is in parallel with the suction passage of described mechanical pump, the oil discharge passage of described electric pump is in parallel with the oil discharge passage of described mechanical pump, in the suction passage of described electric pump and the suction passage of described mechanical pump, be respectively equipped with an one-way valve, described signaling control unit comprises the controller of the motor start and stop of a control electric pump.
Compared with prior art, effect has the following advantages in the present invention:
1) set up rigidly connected the 5th clutch owing to having set up two of controlling in described the 3rd sun gear, described the 3rd gear ring and described third planet frame, thus may for providing more gearshift logic to provide.In the time that the 5th clutch is closed, third planet gear train will become a rigid connection body, and when input power, third planet gear train is by integrated rotary.Only, by set up the 5th clutch at special position, just can realize at least ten two forward gears and reverse gear with at least one, reduce idle row's loss by simple gearshift logical validity, improve the transmission efficiency of speed changer.And between gear between conventional gear than all between 1.024~1.224, very little, powershift is more smooth-going, is not only conducive to improve the dynamic performance but also can further reduce oil consumption of travelling of vehicle, uses more economically, is also more conducive to protection of the environment.Meanwhile, simple change also can make the overall structure of speed changer still keep compact.
2) resultant gear ratio scope can reach 9.13, and known speed changer, its resultant gear ratio scope is generally in 7 left and right, and this just means, adopts structure disclosed in this invention can reach the higher speed of a motor vehicle.
3) any one axle in axle system can connect with motor, and can provide multiple preferred axles that speed changer is connected with motor, thereby obtains mixed power system.Because these preferred axles have higher velocity ratio to input shaft when the low-grade location, therefore a little motor just can have enough moment for quick ato unit.Meanwhile, these axles have higher velocity ratio to output shaft equally, and the motor that makes to be connected on them can help to drive normally work efficiently.
4) the present invention has the function of applicable motor automatic start-stop.In hydraulic system, set up an electric pump, the suction passage of electric pump is in parallel with the suction passage of mechanical pump, and the oil discharge passage of electric pump is in parallel with the oil discharge passage of mechanical pump, and such structure does not need to do large change to original hydraulic system, and can reduce mechanical pump.When to stall, when mechanical air pump inoperative, under the triggering of a controller, electric pump energising operation, thereby make hydraulic oil enter the hydraulic power unit of hydraulic system, ensure motor in the time of ato unit, automatic transmission can normally work.Motor start stop system can make vehicle temporary parking in the process of moving (for example wait for red light) and make motor auto extinguishing while stepping on brake petal, in the time that needs move on, as long as releasing of brake dubs throttle, or steering wheel rotation, motor again can horse back automatic ignition autoboot.Motor start stop system can significantly reduce the fuel consume of vehicle, the urban road that is particularly suitable for blocking up.
Embodiment
Embodiment is used for further illustrating technical conceive of the present invention, and does not limit the scope of the invention.
The first embodiment:
As shown in Figure 1, a kind of automatic transmission, can realize at least ten two forward gears and at least one reverses gear.The input shaft in of speed changer is connected for input power with the first axle 1 by starting unit, and the output shaft out of speed changer is connected for outputting power with the second axle 2 by differential mechanism FD.Described starting unit can be that start clutch can be also fluid torque converter etc.
This speed changer comprises two axle systems that are arranged side by side in a shared mission case 0, three commutating tooth wheels, three planetary gear set and six gear shift units.In the art, there is the axle of same axis and be arranged on the axle system of parts composition on these axles.
The first axle system is positioned at back flow side, comprises that described the first axle 1 and the 3rd axle 3, the 4th axle 4, the 5th axle 5 and the 6th axle 6, the second axle systems are positioned at slave end, comprise the second described axle 2 and the 7th axle 7, the 8th axle 8 the 9th axle 9 and the tenth axle 10.
The 6th axle 6 is connected by the first commutating tooth wheels TG610 with the tenth axle 10, and the first commutating tooth wheels TG610 comprises the first driving gear G6 and the first driven gear G10, and the first driving gear G6 is fixed on the 6th axle 6, and the first driven gear G10 is fixed on the tenth axle 10.
The 4th axle 4 is connected by the second commutating tooth wheels TG47 with the 7th axle 7, and the second commutating tooth wheels TG47 comprises the second driving gear G4 and the second driven gear G7, and the second driving gear G4 is fixed on the 4th axle 4, and the second driven gear G7 is fixed on the 7th axle 7.
The 5th axle 5 is connected by the 3rd commutating tooth wheels TG58 with the 8th axle 8, and the 3rd commutating tooth wheels TG58 comprises the 3rd driving gear G5 and the 3rd driven gear G8, and the 3rd driving gear G5 is fixed on the 5th axle 5, and the 3rd driven gear G8 is fixed on the 8th axle 8.
The first planetary gear set PG1 is arranged on the first axle and fastens, and comprises the first sun gear So1, the first gear ring Ho1 and the first planet carrier Pt1, and the first sun gear So1 is fixed on the 3rd axle 3.The second planetary gear set PG2 is arranged on the second axle and fastens, and comprises secondary sun wheel So2, the second gear ring Ho2 and the second planet carrier Pt2, and the second gear ring Ho2 is fixed on described the 9th axle 9.Third planet gear train PG3 is arranged on the second axle and fastens, and comprises the 3rd sun gear So3, the 3rd gear ring Ho3 and third planet frame Pt3.
Each mechanism unit of this speed changer has following being fixedly connected with:
The first axle 1 is connected with the first planet carrier Pt1 of the first planetary gear set PG1;
The second axle 2 is connected with the third planet frame Pt3 of third planet gear train PG3;
The 4th axle 4 is connected with the first gear ring Ho1 of the first planetary gear set PG1;
The 8th axle 8 is connected with the 3rd sun gear So3 of third planet gear train PG3;
The second axle 2 is connected with the second planet carrier Pt2 of the second planetary gear set PG2;
The 7th axle 7 is connected with the secondary sun wheel So2 of the second planetary gear set PG2;
The tenth axle 10 is connected with the 3rd gear ring Ho3 of third planet gear train PG3.
Described six gear shift units comprise a break and five clutches, for realizing powershift, respectively:
For connecting the first break B1 of the first sun gear So1 and mission case 0;
For connecting the first clutch C1 of the 5th axle 5 and the first planet carrier Pt1;
For connecting the second clutch C2 of the 8th axle 8 and the second gear ring Ho2;
For connecting the 3rd clutch C3 of the 4th axle 4 and the 5th axle 5;
For connecting the four clutches C4 of the 6th axle 6 and the first sun gear So1;
For connecting the 5th clutch C5 of the second axle 2 and the 8th axle 8.
As shown in Figure 3, gearshift logic has shown that how using the combination of these gear shift units to realize one reverses gear and the powershift of 12 forward gears, and each gear is determined is actually a power path.In gearshift logic diagram, blank expression opens, and oblique line represents closure.Each gear switch can realize by simple gearshift to contiguous gear or the gearshift of bypassing the immediate leadership, and that is to say, gearshift only need be by decontroling a gear shift unit and closed another gear shift unit just can complete.Only have under special circumstances, gearshift adopts decontrols two shifting elements and the mode of closed two other shifting element is carried out, simple gearshift certainly than other gearshift mode sooner, more comfortable.
For each gear that travels, in six gear shift units, must there be three closures, this is relevant with the degrees of freedom of speed changer.The present embodiment one has four degrees of freedom, obtain definite kinematic relation, also between all axles, have definite velocity ratio, need to eliminate three degree of freedom, by using gear shift unit linking together between axle and axle or between axle and mission case, can eliminate degrees of freedom.Here it is, and each gear must have the reason of three gear shift unit closures.One reverses gear and 12 optimal ways that forward gear is the present embodiment logical combination, according to the mathematical principle of combination, can also produce more logical combination, according to prior art, those of ordinary skill in the art can know that in these combinations, which is useful.
In Fig. 3, also show the velocity ratio of each speed change level of the first embodiment, with regard to numerical value, the velocity ratio of these six speed change levels is exemplary, can also obtain other more realize possibility by the velocity ratio of these six speed change levels.The velocity ratio x for example increasing or reduce commutating tooth wheels doubly, just can obtain or increase the resultant gear ratio of same multiple.
By the velocity ratio of above-mentioned power path and speed change level can calculate each gear velocity ratio, gear between than and resultant gear ratio scope, these are all presented at Fig. 3 and have suffered.As can be seen from Figure 3, between the gear between conventional gear, ratio is all between 1.024~1.224, very little, in the time of gearshift, more close steps distributes and means that powershift is more smooth-going, and the smoothness of powershift to be automatic transmission do one's utmost praises highly because this can improve dynamic performance further reduce oil consumption of travelling of vehicle.Resultant gear ratio scope has reached 9.13, and known speed changer, its resultant gear ratio scope is generally in 7 left and right, and this just means, adopts structure disclosed in this invention can reach the speed of a motor vehicle faster.
According to the mathematical principle of combination, by increasing the quantity of clutch, provide more gearshift logic, thereby more gear output is provided, this is that those of ordinary skill in the art is known.But, it should be noted that, 1) in numerous gearbox units, set up wherein annexation to form new power path? (the present invention at least comprises three commutating tooth wheels and three planetary gear set, each commutating tooth wheels are divided into two rotary members separately, every planetary gear set is divided into again three rotary members separately) 2) further, how to ensure the useful velocity ratio of sufficient amount, and make between gear than enough little? 3) further, how in increasing output gear, make the overall structure of speed changer still compact? these problems, those of ordinary skill in the art is difficult to be resolved by the test of limited number of time and conventional reasoning.In this sense, above-mentioned data, have exactly embodied the contribution that the present invention makes prior art.
By the velocity ratio of gearshift logic and each speed change level, those skilled in the art can also calculate the power stream on all axles under the torque load of all gearbox units and all gears according to prior art.The conclusion that analysis draws is, for the total output transmission from the first axle to the second axle, under all gears, can not be back to the first axle system from the second axle system by any one in three commutating tooth wheels.Under conventional gear, power transmits by two or three commutating tooth wheels, and total load is low, thus speed changer can design compact.
The second embodiment:
Shown in Fig. 2 is another kind of application form of the present invention, is referred to as hybrid power transmission scheme.Motor EM is connected with the 5th axle 5 by additional commutating tooth wheels, and in this case, motor EM is arranged to parallel with two axle systems.
The first axle 1 is along the Axis Extension of whole the first axle system, and its two end supports is on mission case 0.In this case, the two ends of the first axle 1 can be connected with motor or motor EM.This technological scheme makes speed changer of the present invention can have a large amount of different application design proposals.Such structure is equally applicable to the first embodiment and the second embodiment.
The axis that the second axle 2 along whole second axle is extends, and its two end supports is on mission case 0.In this case, 2 liang of end flange of the second axle can be connected with motor EM.This technological scheme also makes speed changer of the present invention can have a large amount of different application design proposals.Such structure is equally applicable to the first embodiment and the second embodiment.
Any one axle in axle system can be connected with motor.Wherein, the 5th axle 5 or the 8th axle 8 are particularly suitable for being connected with motor EM, because these axles have higher velocity ratio to input shaft in the time of low gear.Like this, a little motor just can have enough moment for quick ato unit.Meanwhile, these axles also have higher velocity ratio to output shaft out equally, and the motor that makes to be connected on them can help to drive normally work efficiently.In the time of the pure motorized motions of vehicle, can disconnect being connected of automatic transmission and motor by starting unit.Like this, just can kill engine, also not need to drag motor.
Shown in Fig. 4 be second embodiment's automatic transmission hydraulic system principle figure (certainly, this scheme is also suitable for the first embodiment), this cover system aims at adaptation motor start stop system and arranges, this hydraulic system comprises hydraulic power unit, hydraulic power control and performance element and signaling control unit, and what in figure, mainly illustrate is the hydraulic power unit of hydraulic system.Hydraulic power unit comprises that one by engine-driven mechanical pump P, and it pumps into hydraulic power control and performance element (the control oil cylinder of for example clutch) from hydraulic oil container through filter cleaner by hydraulic oil, thus the opening and closing of solenoidoperated cluthes.Simultaneously, set up an electric pump EP, the suction passage of electric pump EP is in parallel with the suction passage of mechanical pump P, the oil discharge passage of electric pump EP is in parallel with the oil discharge passage of mechanical pump P, so, when to stall, mechanical pump P is not while working, under the triggering of a controller of signaling control unit, the electric pump EP operation of switching on, thus make hydraulic oil enter the hydraulic power unit of hydraulic system, ensure that motor EM automatic transmission in the time of ato unit can normally work.An one-way valve is set respectively on the oil discharge passage of mechanical pump P and electric pump EP, to prevent that mechanical pump P and electric pump EP hydraulic oil in the time working from refluxing.
Vehicle temporary parking in the process of moving (for example wait for red light) and while stepping on brake petal, the speed of a motor vehicle reduce to 0 and continue for some time after, motor auto extinguishing under the control of ECU (control unit of engine); In the process declining in engine speed, engine speed lower than certain value after, controller starts electric pump EP with constant speed continuous running.In the time that needs move on, as long as releasing of brake dubs throttle, or steering wheel rotation, motor can be restarted by horse back automatic ignition again; After engine start, when engine speed is during higher than a threshold value, controller control electric pump EP quits work.Motor start stop system can significantly reduce the fuel consume of vehicle, the urban road that is particularly suitable for blocking up.
The second embodiment and the first embodiment also have not with being, the 5th clutch C5 is connected between the second axle 2 and the tenth axle 10.
Can be found out by above-mentioned two embodiments, although the setting position difference of the 5th clutch C5, but its object is all two foundation for controlling the 3rd sun gear So3, the 3rd gear ring Ho3 and third planet frame Pt3 to be rigidly connected, thus may for providing more gearshift logic to provide.In the time that the 5th clutch is closed, third planet gear train will become a rigid connection body, and during to its input power, third planet gear train turns round entirety.That is to say, in these two embodiments, in identical gearshift logic situation, speed changer will obtain ratio and resultant gear ratio scope between identical velocity ratio and gear.
The present invention is not limited to structure, principle and the method that above-described embodiment is mentioned, within the equivalent transformation that all those of ordinary skill in the art just can carry out without performing creative labour all will fall into protection scope of the present invention.