KR0183267B1 - Gear-train of 6-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 6 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 six-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 six friction elements for controlling four nodes of a compound planetary gear set thereof to perform a shift, and being arranged on a first axis, A main transmission mechanism selectively transmitting the power of the shaft and the second shaft and performing the shifting of the sixth 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 six-speed automatic transmission for a vehicle.

Description

Gear trains for 6-speed automatic transmissions 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 for obtaining the gear ratios of the forward 6th gear and the reverse 1 gear of the first-stage gear train.

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

[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 are many difficulties in securing.

SUMMARY OF THE INVENTION It is therefore 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 six-speed automatic transmission for a vehicle in which the speed ratio of the forward sixth speed and the reverse first speed is obtained.

Another object of the present invention is to provide a gear train of a six-speed automatic transmission for a vehicle which can reduce the overall length of the 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 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 six friction elements for controlling four nodes of the compound planetary gear set to perform shifting, the first and second friction elements being disposed on a first axis, A peripheral speed mechanism that receives the power of the second shaft selectively and shifts in six forward speeds and one 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 six-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 charged 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 then flows into the pump impeller 10 repeatedly. At this time, the rotation of the stator 14 causes the turbine runner There is a difference between the rotational force of the pump impeller 10 and the rotational force of the pump impeller 10, and 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 .

The rear end of the first shaft 22 connected to the turbine runner 10 of the torque converter 4 is provided with a first shaft 22 and a second shaft 22 which is gear- 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, (26) is connected to the second shaft power input gear (38) through a third friction element (C) 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 first shaft via the fourth friction element C4 and the fifth friction element B1 is interposed Depending on whether the fourth and fifth frictional elements C4 and B1 are selectively activated in connection with the transmission housing 42, the planetary carrier 40 is operated to the input or reaction element.

The connecting member 44 connecting the second friction element C3 and the second sun gear 36 is connected to the transmission housing 42 via the sixth friction element B2 so that the sixth friction element The second sun gear 36 selectively operates as an input and a reaction force element depending on whether or not the first and second sun gears B2 and B2 are operated.

In the above, the first, second and third friction elements C1, C2 and C3 can be used as the clutch means, and the fourth and fifth friction elements B1 and B2 can be used as the brake means. .

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. [

In consideration of this point, the operation of the first forward speed is explained. In the first speed, the first and fifth friction elements (C1) and (B1) are controlled in operation.

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 fifth 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 is not operated.

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, input to the main transmission mechanism 6 through the second shaft 24 by the operation of the third friction element C3 is input to the first sun gear 26, and the fifth 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 force 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, The second shaft 24 receives power from the ring gear 16 formed on the outer diameter of the torque converter 4, and the second shaft 24 receives the power from the ring gear 16 formed on the outer diameter of the torque converter 4. As a result, Because the two axes 24 are 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 sixth friction element B2 are operated.

The rotational power of the engine 2 is then input to the first sun gear 26 through the first shaft 22 by the actuation of the first friction element C1 and the sixth friction element B2 is actuated, The third gear is shifted to the output side through the ring gear 54 while the third gear 36 becomes the reaction force element.

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

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

As shown in FIG. 3, when the fourth input shaft N4 is coupled to the first input speed line S1 and the second input speed line S2 by a fourth node N4, which is the first sun gear 26, 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 sixth 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 inputted 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, .

When the shift is made from the fifth-speed state to the sixth-speed state, the operation of the first and second friction elements (C1) and (C2) operating in the fifth speed is released, and the fourth friction element And controls the sixth frictional element B2.

Then, the rotational power of the second shaft 24 is directly input to the planetary carrier 40, and the second sun gear 36 operates as a fixed element, so that the shift of the speed of 6 is achieved.

3, a straight line L6 connecting the speed input line S3 of the second node N2, which is an input element, and the first node N1, which is a fixed element, The line closest to the third node N3 as the output element becomes the sixth-speed output line D6.

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, In the second and fourth speeds, the rotational power of the second shaft 24, which is faster than the first shaft 22, is inputted, and the shifting to the fifth forward speed can be performed.

In the sixth speed, by inputting the rotational power of the second shaft 24 having a high rotation speed directly to the planetary carrier 40, it is possible to realize the shift of six speeds.

The second frictional element C2 and the fifth frictional element B1 are operated and the rotational power of the first shaft 22 is input to the second sun gear 36 and the fifth friction element B1 is rotated, 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 L6 connecting the output node to the third node N3 closest to the output node is 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 and to combine the power of the oil pump with the main transmission mechanism so as to obtain the speed ratio of the forward sixth speed and the reverse first speed .

And the speed ratio of the forward 6th gear and the reverse 1th gear can be obtained by using one planetary gear set. Therefore, the total length of the automatic transmission can be greatly reduced compared to a 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; 1. A compound planetary gear set of a labi-new type, the first planetary gear set being integrally formed on a hollow member so that a first sun gear can be disposed on a first shaft without rotational intervention, a first pinion meshing with the outside of the first sun gear, The pinion is engaged with the outside of the first pinion and is engaged with the second sun gear, the ring gear is engaged with the outside of the second pinion, the oil pump is mounted on the second shaft, First and second friction elements for engaging with the ring gear of the torque converter and meshing with the second shaft power input gear and for inputting the first shaft to the first and second sun gears, A third friction element for interrupting the input of the power of the second shaft to the first sun gear, and a planetary carrier for supporting the first and second pinions to be connected to the power input gear driven by the second shaft and the transmission housing Fourth and fifth friction elements for allowing the planetary carrier of the planetary carrier to act as an input and a reaction force element and a connecting member for connecting the second friction element and the second sun gear to the transmission housing and the second sun gear being a selective reaction element A sixth friction element for allowing the first friction element to operate; A longitudinal deceleration mechanism that receives power output from the main transmission mechanism through a transfer shaft and decelerates the longitudinal speed; And a gear train of a six-speed automatic transmission for a vehicle that is capable of driving an oil pump by a rotational power of the second shaft.