CN102338213A

CN102338213A - Novel parking braking mechanism of dual clutch automatic transmission (DCT)

Info

Publication number: CN102338213A
Application number: CN2010102304978A
Authority: CN
Inventors: 李骏; 王明成; 卢新田; 刘明科; 顾振宇; 史英哲; 柳芬; 梅相楠; 王志明; 赵成福; 赵雪松; 任明辉
Original assignee: FAW Group Corp
Current assignee: FAW Group Corp
Priority date: 2010-07-16
Filing date: 2010-07-16
Publication date: 2012-02-01

Abstract

The invention discloses a novel parking braking mechanism of a dual clutch automatic transmission (DCT). The novel parking braking mechanism is characterized in that a gear-shafting arm, a push arm, a sector plate and a gear-position sensor are arranged on a gear-shifting shaft, one end of a pull rod is arranged on the push arm, the other end of the pull rod is overlapped inside a fixator hole, a parking gear is arranged on an intermediate shaft of the transmission, and a parking pawl rotates around a parking shaft; and a plate spring is composed of a spring piece, a pin shaft and a casing pipe, and the casing pipe rolls in a groove of the sector plate on a pin shaft in a sleeved manner. The novel parking braking mechanism disclosed by the invention has the advantages of simple and compact structure, light weight, low cost, strong parking bearing capacity, accuracy in gear-shifting positioning, low gear-shifting force, and good hand feel, can be used for realizing five PRNDS (Parking, Reverse, Null, Drive, Sports) gear positions including a parking gear, a reverse gear, a null gear, a drive gear and a sport gear, and can be used for guaranteeing the reliable parking at the P gear.

Description

A kind of novel double-clutch automatic transmission (DCT) parking and braking mechanism

Technical field:

The present invention relates to a kind of novel double-clutch automatic transmission parking and braking mechanism, belong to the automatic gearbox technical field of auto manufacturing.

Background technique:

Along with the fast development of automobile pollution and the rapid increase of amateur driver's quantity, automatic gearbox is just presenting fast development trend.Present automatic gearbox mainly contains hydraulic mechanical type automatic transmission (AT), stepless speed variator (CVT) and double-clutch automatic transmission (DCT).

Realizing on automobile that the self-shifting speed changer is the hydraulic mechanical type automatic transmission, be called for short AT, also is present most widely used automatic gearbox.It does not cut off power gear shifting, has starting, smooth gear shifting, but to advantages such as resisting moment variation self adaptions.But shortcomings such as it also has complex structure simultaneously, and difficulty is made, and transmission efficiency is low.

Manually fixedly the shaft type gear-shift transmission is the step change driving mechanism, and its advantage is that efficient is high, and cost is low, and mature production technology is widely used in China at present.Shortcoming is a gearshift difficulty, and power interruption during gearshift requires pilot control skilled, so people expect that it can realize automation.Computer Control Technology makes this gear realize that self shifter becomes possibility.Double-clutch automatic transmission (DCT) is the automatic mechanical transmission of a new generation; It has inherited high, the many advantages such as installing space is compact, in light weight, low price of manual transmission transmission efficiency; Fundamentally solved the cut-out power gear shifting problem that electric control mechanical type automatic speed variator exists; Greatly improved shifting comfort, guaranteed that vehicle has good power character and gear shifting characteristic.

In double-clutch automatic transmission, each gear driving gear of speed changer by strange, even number gear respectively with input shaft on two clutch C1, C2 being provided be connected, clutch C1, C2 replace transferring power and switch to realize gear.

During DCT work, with certain gear operation, electrical control unit of automatic transmission (TCU) is judged next gear that is about to the work of getting into according to the signal of related sensor to vehicle earlier; Because of this gear clutch separation transferring power not also,, mesh this gear in advance so instruction hydraulic control solenoid valve is controlled gearshift actuator very easily; When vehicle operating reaches shifting points; The clutch separation that only need will work simultaneously with another clutch, then makes automobile go with next gear.In shift process, the power of motor constantly is passed to wheel all the time, so the shift process of accomplishing like this is a power gear shifting.Vehicle implementation the power gear shifting process, will improve shifting comfort greatly, simultaneously guarantee that also vehicle has good and economic, aspects such as vehicle oil consumption and discharging are made moderate progress.

Summary of the invention:

The object of the present invention is to provide a kind of novel double-clutch automatic transmission parking and braking mechanism; Can realize five gears of PRNDS; Comprise that Parking keeps off, reverses gear, neutral, forward gear, motion retaining, the little and good hand touch of gearshift power guarantees that the Parking of vehicle P retaining is reliable.

Technological scheme of the present invention is achieved in that novel double-clutch automatic transmission parking and braking mechanism, it is characterized in that: by park pawl, and Parking gear, gear arm; The gearshift axle, push arm, pull bar, leaf spring; Sector, the return torsion spring, fixture and shift sensor are formed; Wherein gear arm, push arm, sector and shift sensor are installed on the gearshift axle; Be provided with oil sealing between shift sensor and the push arm, pull bar is installed on the push arm, and pull bar front end column part rides in the retainer hole; The Parking gear is installed on the transmission countershaft, and park pawl is rotated around the Parking axle; Leaf spring is made up of spring sheet, bearing pin and sleeve pipe, and casing pipe sleeve is rolling in the groove at sector on the bearing pin.

Good effect of the present invention is simple and compact for structure, and is in light weight, and cost is low; The Parking bearing capacity is strong, and the gearshift accurate positioning can realize five gears of PRNDS; Comprise that Parking keeps off, reverses gear, neutral, forward gear, motion retaining, the little and good hand touch of gearshift power guarantees that the Parking of vehicle P retaining is reliable.

Description of drawings

Fig. 1 is a structural representation of the present invention;

Fig. 2 is that A of the present invention is to structural representation;

Fig. 3 is a working state figure of the present invention;

Embodiment:

Below in conjunction with accompanying drawing the present invention is done further description: novel double-clutch automatic transmission parking and braking mechanism, by park pawl 11, Parking gear 14, gear arm 1; Gearshift axle 5, push arm 4, pull bar 7, leaf spring 8; Sector 6, return torsion spring 10, fixture 13 is formed with shift sensor 2; It is characterized in that: gear arm 1, push arm 4, sector 6 and shift sensor 2 are installed on the gearshift axle 5; Be provided with oil sealing 3 between shift sensor 2 and the push arm 4; Pull bar 7 is installed on the push arm 4; Pull bar 7 front end column parts ride in fixture 13 holes, and Parking gear 14 is installed on the transmission countershaft, and park pawl 11 is rotated around Parking axle 9; Leaf spring 8 is made up of spring sheet, bearing pin and sleeve pipe, and casing pipe sleeve is rolling in the groove of sector 6 on the bearing pin.Cooperate the Parking of realization P retaining to combine and separating action with Parking gear 14.

Like Fig. 1,2, shown in 3, parking and braking mechanism mainly is made up of parts such as return torsion spring 10, Parking gear 14, park pawl 11, push arm 4, gear arm 1, pull bar 7, sector 6, leaf spring 8 and fixtures 13; Gear arm 1, push arm 4 and sector 6 are installed on the gearshift axle 5 through spring pin.During gearshift, the people promotes shift handle, and the gearshift pull bar through the speed changer outside acts on the gear arm 1, and gear arm 1 rotates, and realizes the conversion of PRNDS gear.Each gear cooperates the location by leaf spring 8 and sector 6.Leaf spring 8 is made up of spring sheet, bearing pin and sleeve pipe, and casing pipe sleeve is rolling in the groove of sector 6 on the bearing pin, and design has become rolling friction to sliding friction like this, has reduced surface friction drag.It is little that leaf spring 8 has a deformation displacement, and spring force is big and steadily, high and characteristics easy for installation of life-span.Shift sensor 2 adopts Hall-type rotary angle transmitter form, can realize 360 ° of rotations, can accurately and timely the shift signal that obtains be passed to speed changer TCU, as the input signal of control action.R, N, D, S keep off when transforming each other, and push arm 4 pushing drawing rods 7 front and back move horizontally, and do not produce the Parking effect this moment.When gear was parked in P retaining (Parking retaining), external force was through push arm 4 pushing drawing rods 7, and the straight pin on it overcomes the resistance of return torsion spring 10 and pushes park pawl 11 open under the effect of thrust, and is pressed in the teeth groove of Parking gear 14, realized P retaining parking function.If park pawl 11 by chance can not stretch in the teeth groove, but when being stuck in tooth top, the spring on the pull bar 7 is compressed; Straight pin is stuck between fixture 13 and the park pawl 11, and fixing bolt 12 is used to connect fixture 13, at this moment; Halting mechanism can not produce parking function, and when car appearred slipping in vehicle, Parking gear 14 can rotate along with jack shaft; Park pawl 11 is pressed in the teeth groove of Parking gear 14 under the effect of spring force, finally realizes parking function.Vehicle in the process of moving because car load vibration park pawl 11 possibly be pushed in the teeth groove of Parking gear 14, return torsion spring 10 has and prevents that its mistake is pushed into the function in the teeth groove, guarantees the Security of vehicle driving.

Claims

1. novel double-clutch automatic transmission parking and braking mechanism, by park pawl (11), Parking gear (14), gear arm (1); Gearshift axle (5), push arm (4), pull bar (7), leaf spring (8); Sector (6), return torsion spring (10), fixture (13) and shift sensor (2) are formed; It is characterized in that: gear arm (1), push arm (4), sector (6) and shift sensor (2) are installed on the gearshift axle (5); Be provided with oil sealing (3) between shift sensor (2) and the push arm (4); Pull bar (7) is installed on the push arm (4); Pull bar (7) front end column part rides in fixture (13) hole, and Parking gear (14) is installed on the transmission countershaft, and park pawl (11) is rotated around Parking axle (9); Leaf spring (8) is made up of spring sheet, bearing pin and sleeve pipe, and casing pipe sleeve is rolling in the groove of sector (6) on the bearing pin.