CN201580247U

CN201580247U - Novel double-clutch automatic transmission system

Info

Publication number: CN201580247U
Application number: CN200920094887XU
Authority: CN
Inventors: 王建忠; 卢新田; 杨立功; 赵璐
Original assignee: FAW Group Corp
Current assignee: FAW Group Corp
Priority date: 2009-11-30
Filing date: 2009-11-30
Publication date: 2010-09-15
Anticipated expiration: 2019-11-30

Abstract

The utility model relates to a novel double-clutch automatic transmission system. The novel double-clutch automatic transmission system is characterized in that an assisted clutch is arranged at the rear end of an input shaft or a middle shaft of a mechanical transmission case; the assisted clutch is a wet type clutch; a driving disc of the wet type clutch is connected with the input shaft or the middle shaft through a spline; a driven disc of the wet type clutch is connected with an output shaft through gearing mesh; and then the input shaft or the middle shaft is connected with the output shaft through the drive disc and the driven disc of the wet type clutch. The novel double-clutch automatic transmission system has simple and easy structure, easy processing and lower cost, and the cost thereof is greatly lower than that of automatic transmissions, such as AT (automatic transmission), CVT (Continuously Variable Transmission), the existing DCT (Double Clutch Transmission), and the like. The novel double-clutch automatic transmission system is applied to medium and heavy cargo trucks, and leads the medium and heavy cargo trucks to realize gear change without power failure.

Description

A kind of later-model double-clutch automatic speed-change system

Technical field

The utility model relates to a kind of later-model double-clutch automatic speed-change system, and power failure-free in the time of can realizing shifting gears is mainly used in the automatic transmission with hydraulic torque converter field of medium and heavy vehicle.

Background technology

Fast development along with automotive technology, the automatic gear for vehicle that various ways occurred, mainly contain: hydraulic mechanical type automatic transmission with hydraulic torque converter (AT), mechanical continuously-variable transmission (CVT), and exerting both at home and abroad the electric control mechanical type automatic speed variator (AMT) studied in recent years.The particularly development of electric control mechanical type automatic speed variator because it has the advantage of the existing hand-operated transmission production investment of the desired high fuel economy of present automobile industry development, anti-emission carburetor and protection, just has been subjected to the attention of each big motor plant.

The generation of electric control mechanical type automatic speed variator is based on the development of traditional parallel-axis type hand-operated transmission and comes.Among development research process to electric control mechanical type automatic speed variator, also discovery gradually its some shortcomings, power interruption when the problem of its maximum is exactly gear shift, this dynamic property to vehicle, traveling comfort and fuel economy and discharging have brought certain influence.AMT plucks neutral gear with change-speed box then because its structural principle has determined it at first to want cut-off clutch in gearshift procedure, gear selecting, gear shift again, last engaging clutch.Like this, behind disengaging of clutch, before power-transfer clutch engages again again, the power of driving engine can not be passed to wheel and go the powered vehicle operation, so produced the interruption of transmission of power in the gearshift procedure, vehicle certainly leads to deceleration/decel, and shift time is long, brings adverse effect for the accelerating ability, traveling comfort etc. of vehicle.

Double-clutch automatic transmission (DCT) is emerging in recent years a kind of automatic transmission with hydraulic torque converter form, it can solve the power interruption problem that present automobile electric control mechanical type automatic speed variator produces effectively in gearshift procedure, present double-clutch automatic transmission structure as shown in Figure 1, though it has solved the power interruption problem in the gearshift procedure, but its complex structure (two input shafts are concentric shafts), be difficult to make, double clutch device particularly, manufacturing cost and technological requirement are all very high, and still can not domesticize at present.Especially for the medium and heavy load-carrying vehicle of high pulling torque, traditional coaxial type double clutch device is to be difficult to realize.

Summary of the invention

The purpose of this utility model is to provide a kind of later-model double-clutch automatic speed-change system, and it is the double-clutch automatic transmission that a kind of structure is simple and direct, manufacturing cost is lower, safe and reliable, has overcome the shortcoming that present various automatic transmission with hydraulic torque converter exists; The moment of torsion of control assisted clutch can be realized power failure-free, and not need to separate master clutch during gearshift.

The technical solution of the utility model is achieved in that a kind of later-model double-clutch automatic speed-change system, it is characterized in that: an assisted clutch is installed in the input shaft of mechanical gearbox or the rear end of tween drive shaft, assisted clutch is a liquid clutch, the driving disc spacing pressing of liquid clutch links together by spline connection and input shaft or tween drive shaft, the clutch plate of liquid clutch connects together with output shaft by gear mesh, thereby input shaft or tween drive shaft is connected together with output shaft with driving disc spacing pressing by the clutch plate of liquid clutch.

Good effect of the present utility model is that its inner transmission is the pure mechanical drive of gear type, and the driving efficiency during operation is equal to electric control mechanical type automatic speed variator AMT; Do not have power interruption in gearshift procedure, significantly not slowing down produces, smooth gear shifting, and shift speed is fast, has improved the gear shift traveling comfort greatly, has guaranteed that vehicle has good dynamic property and shift quality; Double-clutch is made up of a common dry type clutch and a common liquid clutch, do not need two concentric input shafts, structure is simpler, compact, is easy to processing, cost is lower, and its cost is well below automatic transmission with hydraulic torque converters such as AT, CVT, existing DCT; Be applied to medium and heavy load-carrying vehicle, make medium and heavy load-carrying vehicle realize the power failure-free gearshift.

Description of drawings

Fig. 1 is the utility model double-clutch automatic transmission constructional drawing;

Fig. 2 is the first half of gearshift

Fig. 3 plucks the neutral part for gearshift;

Fig. 4 is the latter half of gearshift;

1. driving engine 2. master clutchs 3. input shafts 4. 3rd gears 5. combined covers 6. seconds speed gear 7. output shafts 8. assisted clutchs

The specific embodiment:

Below in conjunction with accompanying drawing the utility model is described further, the switching between other gear is with to change the three-speed example identical with two retainings:

A kind of later-model double-clutch automatic speed-change system as shown in Figure 2, it is characterized in that: an assisted clutch 8 is installed in the input shaft 3 of mechanical gearbox or the rear end of tween drive shaft, assisted clutch 8 is a liquid clutch, the driving disc spacing pressing of liquid clutch links together by spline connection and input shaft 3 or tween drive shaft, the clutch plate of liquid clutch connects together with output shaft 7 by gear mesh, thereby input shaft 3 or tween drive shaft is connected together with output shaft 7 with driving disc spacing pressing by the clutch plate of liquid clutch.

When vehicle control system sends shifting commands, assisted clutch 8 beginning combinations, increase along with its moment of torsion, the moment of torsion of current shelves gear reduces gradually, shift-selecting and changing actuating mechanism will be plucked neutral, this moment, driving engine 1 power was passed to output shaft 7 by assisted clutch 8 fully, driving engine 1 rotating speed will change rapidly, to hang rapidly when changing to the target shift gear rotational speed when synchronous shift-selecting and changing actuating mechanism into target, assisted clutch 8 will separate gradually then, its moment of torsion will gradually reduce zero subsequently, and engine torque transmits through the target shift gear fully, and shift process finishes.

Change-speed box as shown in Figure 3-Figure 5 rises up into the whole shift process of three-speed by second gear, Fig. 3 is the forebody of gearshift, driving engine 1 power passes to output shaft 7 by 3rd gear 4, combined cover 5, second speed gear 6 as shown in the figure, increase along with assisted clutch 8 action torques, second speed gear 6 moments of torsion of change-speed box reduce to zero gradually, shift-selecting and changing actuating mechanism is plucked neutral, second speed gear 6 jump out of meshs, and change-speed box enters neutral; Then, the transmission of power of driving engine 1 enters state as shown in Figure 4, this moment, the torque transfer of driving engine 1 arrived assisted clutch 8, action torque by assisted clutch 8 reduces, the rotating speed of driving engine 1 reduces, when driving engine 1 rotating speed equated with 3rd gear 4 rotating speeds, shift-selecting and changing actuating mechanism was hung third gear, and 3rd gear 4 enters engagement; At last, power transmission enters state as shown in Figure 5, this moment, assisted clutch 8 separated gradually, in this course, the action torque of assisted clutch 8 reduces gradually, and the moment of torsion that imports 3rd gear 4 into increases gradually, separates fully up to assisted clutch 8, driving engine 1 moment of torsion transmits through 3rd gear 4 fully, and shift process finishes.

Below only just have one, two, three, four, five, the embodiment of totally six gear change-speed boxs can realize more speed change gear or modification set-up mode; but so long as it be connected with output shaft 7 and form double clutch construction with the assisted clutch 8 that increases by in input shaft 3 (or tween drive shaft) rear end of standard machinery formula change speed gear box; assisted clutch 8 works during gearshift; the realization power failure-free is not separated gearshift with master clutch 2, all belongs to the claim protection domain of the technology of the present invention design.

Claims

1. later-model double-clutch automatic speed-change system, it is characterized in that: an assisted clutch (8) is installed in the rear end of input shaft of mechanical gearbox (3) or tween drive shaft, assisted clutch (8) is a liquid clutch, the driving disc spacing pressing of liquid clutch links together by spline connection and input shaft (3) or tween drive shaft, the clutch plate of liquid clutch connects together with output shaft (7) by gear mesh, thereby input shaft (3) or tween drive shaft is connected together with output shaft (7) with driving disc spacing pressing by the clutch plate of liquid clutch.