KR0183247B1 - Gear train of 5-stage auto-transmission - Google Patents

Abstract

The oil pump is driven using the engine starting ring gear mounted on the torque converter and the power of the oil pump is joined to the main transmission mechanism to obtain the speed ratio of the forward 5 speed and the reverse 1 speed and the total length of the automatic transmission can be reduced And to provide a gear train of a 5-speed automatic transmission for a vehicle which is easy to secure an installation space of an oil pump; A torque converter that receives power from the engine and converts the torque into torque; A first and a second shafts directly connected to the output side of the torque converter to receive power and to receive power from the ring gear mounted on the outer periphery of the torque converter to the gear motor; A compound planetary gear set of a rabbit new type and five friction elements for controlling the four nodes of the compound planetary gear set so as to effect a speed change, A main transmission mechanism selectively transmitting the power of the first shaft and the second shaft and shifting the transmission in the first forward speed and the first reverse speed; A longitudinal deceleration mechanism that receives power output from the main transmission mechanism through a transfer shaft and decelerates the longitudinal speed; And an oil pump can be driven by the rotational power of the second shaft. The present invention also provides a gear train of a five-speed automatic transmission for a vehicle.

Description

Gear trains of 5-speed automatic transmission for vehicles

FIG. 1 is a configuration diagram of a gear train according to the present invention. FIG.

2 is an operation table of friction elements for each shift stage to obtain the gear ratios of the forward 5th gear and the reverse 1 gear of the first gear train.

FIG. 3 is a view for explaining the operational explanation of the present invention with a lever analysis method.

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a gear train of a 5-speed automatic transmission for a vehicle, and more particularly, to an oil pump for driving an oil pump using an engine starting ring gear mounted on a torque converter, So as to obtain a first-speed gear ratio and a second-speed reverse gear ratio.

For example, a vehicular automatic transmission includes a torque converter that performs a torque conversion of a rotational power output from an engine, a planetary gear set, a gear box that is composed of a plurality of friction elements and shifts rotational power output from the torque converter, And a hydraulic pressure control system for controlling the hydraulic pressure in accordance with the running conditions of the vehicle so as to effect a shift.

The planetary gear set embedded in the gear box includes a sun gear, a plurality of planetary gears, a planetary carrier connecting the planetary gears, and a ring gear, and is selectively operated by a plurality of clutches and brakes The desired gear ratio can be obtained by selectively fixing the gears or operating the input stage elements.

If such a vehicular automatic transmission fails to fully utilize the performance of the engine in a high output engine, fuel economy and power performance and driving performance become poor, as is well known.

Therefore, it is proposed that a multi-stage transmission ratio can be made in order to sufficiently utilize the performance of the engine in a high output engine.

However, in the conventional automatic transmission, at least two or more planetary gear sets must be provided because the input elements are limited to any one of them, so that the manufacturing cost for manufacturing the planetary gear set is greatly increased and the internal configuration is also very complicated Has a problem.

Further, since the two planetary gear sets are installed and a large number of friction elements capable of controlling the two sets are additionally arranged, the total length of the transmission becomes long, and the installation space of the oil pump, which generates the hydraulic pressure for operating the automatic transmission, There is a lot of difficulty in securing.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a torque converter that drives an oil pump using an engine starting ring gear mounted on a torque converter, And a gear train of a five-speed automatic transmission for a car which is joined to a mechanism so as to obtain a speed ratio of forward speed 5 and reverse speed 1.

It is another object of the present invention to provide a gear train of a five-speed automatic transmission for a vehicle which can reduce the overall length of an automatic transmission and achieve a space for installing an oil pump by achieving the above object.

In order to achieve these objects, the present invention provides a torque converter comprising: a torque converter that receives torque from an engine and torque-converts the torque; A first and a second shafts receiving the power directly connected to the output side of the torque converter and being arranged to receive power from the ring gear mounted on the outer periphery of the torque converter, A first planetary gear set including a first planetary gear set, a first planetary gear set, a second planetary gear set, and a fifth planetary gear set, A peripheral speed mechanism that selectively receives the power of the first and second shafts and shifts the fifth forward speed and the reverse reverse speed; A longitudinal deceleration mechanism that receives power output from the main transmission mechanism through a transfer shaft and decelerates the longitudinal speed; And an oil pump can be driven by the rotational power of the second shaft. The present invention also provides a gear train of a five-speed automatic transmission for a vehicle.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a diagram showing a gear train of a first embodiment according to the present invention in which power generated from an engine 2 is input to a main transmission mechanism 6 through two paths via a torque converter 4, And the rotational power to which the shifting is made is configured to drive the drive wheel through the longitudinal speed reduction mechanism 8 including the differential mechanism.

The torque converter 4, which converts the torque generated from the engine 2, comprises a pump impeller 10 rotating directly on the crankshaft of the engine 2; A turbine runner 12 disposed opposite to the pump impeller 10 and rotated together by the oil to be jetted; And a stator (14) disposed between the pump impeller (10) and the turbine runner (12) to change the flow of oil to increase the rotational force of the pump impeller (10).

Accordingly, when the engine rotates, the oil filled in the torque converter 4 is ejected from the pump impeller 10 and supplied to the turbine runner 12 to drive the turbine runner 12, and then flows into the stator 14 .

The oil introduced into the stator 14 changes its direction and flows into the pump impeller 10 repeatedly. At this time, the turbine runner (stator) 14, which is shared by the stator 14 by the rotation of the stator 14 12 and the rotational force of the pump impeller 10, so that torque conversion is performed.

A ring gear 16 is disposed on the outer circumferential surface of the torque converter 4 and a pinion 20 of the starter motor 18 is engaged with the ring gear 16. The initial driving of the engine 2 is started by the driving force of the starter motor 18 .

A first shaft 22 is connected to a rear end of a first shaft 22 connected directly to the turbine rinner 10 of the torque converter 4 and a second shaft 22 24 for transmitting the power to the main transmission mechanism 6 for shifting.

In this case, the main transmission mechanism 6 is provided with a compound planetary gear set of a rabbit new type and a friction element for controlling the compound planetary gear set so as to perform a shifting operation. The first planetary gear set includes a first sun gear 26, Is integrally formed on the hollow member (28) so that it can be placed on the shaft (22) without rotational intervention.

A first pinion 30 and a second pinion 30 are coupled to the first sun gear 26. A second pinion 30 is coupled to a second pinion 30, A ring gear 34 is engaged with the outer side of the second pinion 32.

The second pinion 32 is meshed with the second sun gear 36 so that two planetary gear sets can share one composite planetary gear set while sharing the second pinion 32 and the ring gear 34 .

In this complex planetary gear set, the first and second sun gears 26 and 36 are connected to the first shaft 22 via the first and second friction elements C1 and C2, respectively, The other side of the second shaft 26 is connected to the second shaft power input gear 38 via a third friction element C3 that interrupts the power input from the second shaft 24. [

Accordingly, rotational power is input to the complex planetary gear set according to the operation control of the first, second, and third friction elements C1, C2, and C3.

The planetary carrier 40 supporting the first and second pinions 30 and 32 is connected to the transmission housing 42 via the fourth friction element B1 to be actuated by the fourth friction element B1 The planetary carrier 40 is operated as an optional reaction force element.

The connecting member 44 connected to the second friction element C3 and the second sun gear 36 is connected to the transmission housing 42 by the fifth friction element B2 so as to be connected to the fifth friction element The second sun gear 36 operates as an optional reaction force element depending on whether the first sun gear 36 or the second sun gear 36 is operating.

The first, second, and third friction elements C1, C2, and C3 may be multi-plate clutches as clutch means and the fourth and fifth friction elements B1 and B2 may be used as brake means. Can be used.

A second shaft 24 for transmitting power to the second shaft power input gear 38 is mounted at an intermediate portion thereof with an oil pump 46 so as to generate a hydraulic pressure used for operating the torque converter 4 and the friction elements Gears 48 and 50 are mounted on both ends thereof so that the front gear 48 meshes with the ring gear 16 of the torque converter 4 and the rear gear 50 meshes with the second shaft power input gear 38, and the second shaft 24 thereof is rotated in a direction opposite to the first shaft 22.

A longitudinally decelerating mechanism 8 for receiving the power transmitted from the main transmission mechanism 6 and finally decelerating is connected to the ring gear 34 via a transfer shaft 52, A gear 56 engaged with a gear 54 formed on the outer periphery of the gear 34 and a gear 60 meshing with the ring gear 58 of the longitudinal speed reduction mechanism 8. [

The differential mechanism 62 includes a differential mechanism 62 that converts the rotational power input from the ring gear 58 into a differential value based on the load applied to the both drive wheels 64 The power distribution to the right is distributed.

In the gear train of the present invention as described above, the shifting operation is performed while the friction elements are operated as shown in the friction element operation table of FIG. 2. The gear shifting process will be described while viewing the operation element table and the lever interpretation table of FIG. 3 .

The first node N1 on the lever L is connected to the second sun gear 36 and the second node N2 is connected to the planetary carrier 40, The third node N3 is set to the ring gear 34, and the fourth node N4 is set to the first sun gear 26. [

Taking this into consideration, the operation of the forward first speed will be described. In the first speed, the first and fourth friction elements (C1) and (B1) are actuated.

Then, the rotational power of the engine 2 is output through the first shaft 22 and the second shaft 24. At this time, the first friction element C1 is operated to rotate the first shaft 22 The fourth friction element B1 is operated and the planetary carrier 40 becomes a reaction force element so that the first speed change is made and the output is made through the ring gear 54. [

At this time, the rotational force inputted to the second shaft 24 only drives the oil pump 46 because the third friction element C3 does not operate.

The first input speed line S1 input to the fourth node N4 as the first sun gear 26 and the planetary carrier 40 acting as the reaction force element, The line connecting the straight line L1 connecting the two nodes N2 closest to the third node N3 serving as the output element becomes the first output speed line D1.

That is, it can be seen that the output rotation speed becomes much smaller than the input rotation speed, so that the deceleration is performed at the speed ratio of the first speed.

When the shift is made from the first speed state to the second speed as described above, the operation of the first friction element C1 is released and the third friction element C3 is actuated in the first speed state.

Then, the input to the main transmission mechanism 6 via the second shaft 24 is inputted to the first sun gear 26 by the operation of the third friction element C3, and the fourth friction element b1 is operated The planetary carrier 40 becomes the reaction force element, and the second-speed shift is performed, and the output is made through the ring gear 34.

At this time, the rotational power output to the first shaft 22 does not affect the shifting process of the main transmission mechanism 6 because the first friction element C1 does not operate, and the first and second friction elements C1, The second shaft 24 receives power from the ring gear 16 formed at the outer diameter of the torque converter 4 and the second shaft 24 receives the power from the ring gear 16 formed at the outer diameter of the torque converter 4, Because the shaft 24 is input while rotating at a faster speed than the first axis 22.

3, the input of the first input speed line S1 and the second input speed line S2 to the fourth node N4, which is the first sun gear 26, A line connecting the straight line L2 connecting the second node N2, which is the planetary carrier 40 acting as a reaction force element, closest to the third node N3, which is an output element, (D2).

That is, the input is made larger in the state of the first speed so that the second speed is shifted.

When the shift is made from the second speed state to the third speed as described above, the first friction element C1 and the fifth friction element B2 are operated.

The rotational power of the engine 2 is then input to the first sun gear 26 via the first shaft 22 as the first friction element C1 is actuated and the fifth friction element B2 is actuated, The sun gear 36 becomes a reaction force element, and the third gear is shifted to be output through the ring gear 54. [

At this time, the rotational force inputted to the second shaft 24 only drives the oil pump 46 because the third friction element C3 does not operate.

3, the first input speed line S1 input to the fourth node N4, which is the first sun gear 26, and the second input sun gear S2, which is the second sun gear 26 acting as the reaction force element, The line connecting the straight line L3 connecting the first node N1 as the output element to the third node N3 as the output element becomes the third output speed line D3.

When the shift is made from the third speed state to the fourth speed state as described above, the operation of the first friction element C1 is released and the third friction element C3 is actuated in the third speed state.

Then, in the main transmission mechanism 6, an input is made through the second shaft 24 by the operation of the third friction element C3 and input to the first sun gear 26, and the fifth friction element B2 is operated The second sun gear 36 becomes the reaction force element, and the third gear is shifted to output through the ring gear 34.

The fourth speed N2 of the first sun gear 26 is the sum of the first input speed line S1 and the second input speed line S2 as shown in FIG. A line connecting the straight line L4 connecting the first node N1 which is the second sun gear 36 acting as the reaction force element to the third node N3 which is the output element, The output speed line D4 is the output speed line D4.

When the shift is made from the fourth speed state to the fifth speed, the operation of the third and fifth friction elements C3 and B2 which were operating in the fourth speed is released, and the first and second friction elements C1 ) C2.

Then, the rotational power of the first shaft 22 is input simultaneously through the first and second sun gears 26 and 36, and the planetary gear set is locked while being directly engaged to perform the fifth-speed shifting .

3, the first input speed line S1 is connected to the fourth node N4, which is the first sun gear 26, and the second sun gear S2, which serves as another input element, A line connecting the straight line L5 connecting the input speed line S3 of the first node N1 as the output element closest to the third node N3 as the output element is connected to the output speed line D5 of the fifth speed, .

As described above, the process of shifting forward 5 speeds has the same operating elements in the first, second, third, and fourth speeds as a result. However, in the first and third speeds, The rotational power of the second shaft 24, which is higher in rotational speed than the first shaft 22, is inputted in the second and fourth speeds, and the shift is performed up to the fifth forward speed.

The second frictional element C2 and the fourth frictional element B1 are operated and controlled so that the rotational power of the first shaft 22 is input to the second sun gear 36, So that the planetary carrier 40 acts as a reaction force element to perform the reverse shift.

3, the third input speed line S3 of the first node N1, which is the second sun gear 36, and the second input node N2, which is the planetary carrier 40 acting as the reaction force element, The line connecting the straight line L5 connecting the output node to the third node N3 as the output element becomes the reverse output speed line R. [

Since the reverse output speed line R is positioned below the lever L in the above description, it can be clearly seen that the reverse output is performed.

The rotational power in which the shifting is performed in the above-described manner allows the transfer shaft 52 to be input to the longitudinal speed reduction mechanism 8 and to drive the vehicle through the differential mechanism 62 via the drive wheel 64 .

As described above, according to the present invention, it is possible to drive the oil pump by using the engine starting ring gear mounted on the torque converter, to join the power of the oil pump to the main transmission mechanism, .

In this case, the speed ratio of the fifth forward speed and the reverse first speed can be obtained by using one planetary gear set, so that the total length of the automatic transmission can be greatly reduced as compared with the conventional automatic transmission using at least two planetary gear sets.

Further, since the oil pump is driven by another shaft, there is an advantage that there is no great difficulty in securing the installation space for the oil pump.

Claims (1)

A torque converter that receives power from the engine and converts the torque into torque; A first and a second shafts directly connected to the output side of the torque converter to receive power and to receive power from the ring gear mounted on the outer periphery of the torque converter to the gear motor; A first sun gear integrally formed on the hollow member so as to be able to be disposed on the first shaft without rotational intervention; a first pinion which is engaged with the outside of the first sun gear; and a second pinion which is engaged with the outside of the first pinion A second planetary gear set comprising a second pinion meshing with the second sun gear and a ring gear meshing with the outside of the second pinion; First and second friction elements for respectively interrupting input of power of the first shaft to the first and second sun gears; A third friction element for interrupting input of power of the second shaft to the first sun gear; A fourth and fifth friction elements interposed between the planetary carrier supporting the first and second pinions and the linking member connecting the second friction element and the second sun gear to the transmission housing so that they can act as a reaction force element, A main transmission mechanism including; A longitudinal deceleration mechanism that receives power output from the main transmission mechanism through a transfer shaft and decelerates the longitudinal speed; And an oil pump is mounted on the second shaft, gears are mounted on both ends thereof, the front gear is meshed with the ring gear of the torque converter, and the rear gear is meshed with the second shaft power input gear. Gear trains in automatic transmissions.