KR102417348B1 - Planetary gear train of automatic transmission for vehicles - Google Patents

Abstract

A planetary gear train of an automatic transmission for a vehicle is disclosed. A planetary gear train of an automatic transmission for a vehicle according to an embodiment of the present invention includes an input shaft receiving power from an engine, an output shaft outputting power, a first planetary gear set having first, second, and third rotation elements; Combination of 2 and 3 planetary gear sets, a compound planetary gear set having fourth, fifth, sixth, and seventh rotational elements, and a fourth planetary gear set having eighth, ninth and tenth rotational elements , a first shaft fixedly connected to the tenth rotating element and the input shaft, a second shaft fixedly connected to the second rotating element and fixedly connected to the output shaft, and fixed to the first rotating element and the ninth rotating element A third axis connected to the fourth axis, a fourth axis fixedly connected to the fourth rotating element and the eighth rotating element, a fifth axis fixedly connected to the sixth rotating element, and a sixth axis fixedly connected to the seventh rotating element , and a plurality of shafts formed of a combination of the remaining non-connected rotation elements among the rotation elements of the first planetary gear set and the compound planetary gear set and selectively connected to the transmission housing, respectively.

Description

Planetary gear train of automatic transmission for vehicles

The present invention relates to an automatic transmission for a vehicle, and more particularly, by implementing a 9-speed forward shift stage with a minimal configuration to improve power transmission performance and fuel efficiency, and to use a driving point in a low rpm range of the vehicle. It relates to a planetary gear train of an automatic transmission for a vehicle capable of improving driving quietness.

In general, in the field of automatic transmission, multi-stage shifting is being studied as a technology to improve fuel efficiency and maximize drivability of a vehicle. have.

Accordingly, research is being conducted to reduce weight and improve fuel efficiency through downsizing of the engine, and research is being conducted to secure drivability and fuel economy competitiveness at the same time through multi-stage transmission of an automatic transmission. .

However, in the automatic transmission, the number of internal parts, particularly the planetary gear set, increases as the shift stage increases, and as the overall length of the transmission increases, mountability, production cost, weight, and power transmission efficiency may rather deteriorate.

Therefore, it is important to develop a planetary gear train capable of maximizing efficiency with a small number of parts in order to increase the fuel efficiency improvement effect through the multi-stage shifting of the automatic transmission.

In this regard, recent automatic transmissions are configured to implement 8-speed or higher shifting and are being mounted on vehicles, and research and development of planetary gear trains capable of realizing more shifts are also continuously required.

However, a typical 8-speed or higher automatic transmission mostly consists of 3 to 4 planetary gear sets and 5 to 7 coupling elements (friction elements).

Accordingly, in order to multistage the shift stage of an automatic transmission, a double-row structure in which a planetary gear set is disposed on a planetary gear set is recently adopted or a dog clutch is applied instead of a wet coupling element. However, in this case, the applicable structure is limited There is a problem in that the shift feeling is deteriorated due to the application of the dog clutch.

Matters described in this background section are prepared to enhance understanding of the background of the invention, and may include matters that are not already known to those of ordinary skill in the art to which this technology belongs.

The embodiment of the present invention implements a 9-speed forward shift stage with a minimal configuration, thereby improving power transmission performance and improving fuel efficiency according to the multi-stage shift stage, and by using an operating point in a low engine speed range An object of the present invention is to provide a planetary gear train for an automatic transmission for a vehicle that improves driving quietness of a vehicle.

In one or more embodiments of the present invention, an input shaft receiving engine power, an output shaft outputting power, first, second, and third planetary gear sets having first, second, and third rotational elements, second and third planetary gears A compound planetary gear set having fourth, fifth, sixth, and seventh rotating elements by a combination of sets, a fourth planetary gear set having eighth, ninth and tenth rotating elements, and the tenth rotating element and a first shaft fixedly connected to the input shaft, a second shaft fixedly connected to the second rotational element, and fixedly connected to the output shaft, a third shaft fixedly connected to the first rotational element and the ninth rotational element, A fourth axis fixedly connected to the fourth rotating element and the eighth rotating element, a fifth axis fixedly connected to the sixth rotating element, a sixth axis fixedly connected to the seventh rotating element, and the first planetary planet A planetary gear train for an automatic transmission for a vehicle including a gear set and a plurality of shafts selectively connected to a transmission housing by a combination of the remaining rotation elements that are not connected among the rotation elements of the composite planetary gear set may be provided.

Here, the plurality of shafts include a seventh shaft fixedly connected to the fifth rotational element and selectively connected to the transmission housing, and an eighth shaft fixedly connected to the third rotational element and selectively connected to the transmission housing, and , the second axis and the fifth axis, the second axis and the sixth axis, the third axis and the seventh axis, and the sixth axis and the eighth axis may be selectively connected to each other.

The planetary gear train has four clutches selectively connecting the shaft to the shaft, and

It may further include two brakes selectively connecting the seventh shaft and the eighth shaft to the transmission housing, respectively.

In this case, the four clutches include a first clutch configured between the second shaft and the fifth shaft, a second clutch configured between the second shaft and the sixth shaft, and the third shaft and the seventh shaft. a third clutch configured between, and a fourth clutch configured between the sixth shaft and the eighth shaft, wherein the two brakes include a first brake configured between the seventh shaft and the transmission housing, and The second brake may be configured between the eighth shaft and the transmission housing.

In addition, the first planetary gear set is composed of a single pinion planetary gear set, and the first, second, and third rotation elements are composed of a first sun gear, a first planetary carrier, and a first ring gear, and the compound planetary gear The set consists of a combination of a single pinion planetary gear set and a double pinion planetary gear set, wherein the fourth, fifth, sixth and seventh rotation elements are a second sun gear, a third sun gear, a shared planetary carrier, and a shared ring gear. and the fourth planetary gear set may include a single pinion planetary gear set, and the eighth, ninth, and tenth rotational elements may include a fourth sun gear, a fourth planetary carrier, and a fourth ring gear.

In addition, the first, fourth planetary gear sets and the compound planetary gear set may be arranged in the order of a fourth planetary gear set, a compound planetary gear set, and a first planetary gear set from the engine side.

The planetary gear train according to an embodiment of the present invention may implement a 9 forward speed shift stage and a reverse 1 speed shift stage by combining one complex planetary gear set and two simple planetary gear sets into six coupling elements.

In addition, the planetary gear train according to an embodiment of the present invention can implement a shift stage suitable for the engine rotation speed by multiplying the shift stage of the automatic transmission. can improve driving quietness.

In addition, the planetary gear train according to an embodiment of the present invention can maximize engine operation efficiency by multi-stage automatic transmission, and can improve power transmission performance and fuel efficiency.

In addition, the effects obtainable or predicted by the embodiments of the present invention are to be disclosed directly or implicitly in the detailed description of the embodiments of the present invention. That is, various effects predicted according to an embodiment of the present invention will be disclosed in the detailed description to be described later.

1 is a block diagram of a planetary gear train according to an embodiment of the present invention.
2 is an operation table for each gear stage of a coupling element applied to a planetary gear train according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

However, in order to clearly explain the embodiment of the present invention, parts irrelevant to the description are omitted, and the same or similar components are given the same reference numerals throughout the specification.

In the following description, the names of the components are divided into the first, the second, and the like to distinguish them because the names of the components are the same, and the order is not necessarily limited thereto.

1 is a block diagram of a planetary gear train according to an embodiment of the present invention.

1 , a planetary gear train according to an embodiment of the present invention includes first, second, third, and fourth planetary gear sets PG1 (PG2) (PG3) (PG4) disposed on the same axis; The input shaft IS, the output shaft OS, and the first, second, third, and fourth planetary gear sets PG1, PG2, PG3, and PG4 are connected to the eight shafts TM1 to TM8), four clutches (C1 to C4) and two brakes (B1 to B2), which are coupling elements, and a transmission housing (H).

The second and third planetary gear sets PG2 and PG3 are combined to form one complex planetary gear set CPG.

The rotational power from the engine input from the input shaft IS is shifted by the complementary operation of the first, second, third, and fourth planetary gear sets PG1, PG2, PG3, and PG4, and the output shaft It is output through (OS).

In the embodiment of the present invention, each planetary gear set comprises a fourth planetary gear set PG4, second and third planetary gear sets PG2 and PG3 from the engine side; 1 is arranged in the order of the planetary gear set PG1.

The input shaft IS is an input member, and rotational power from the crankshaft of the engine may be torque-converted and input through a torque converter.

The output shaft OS is an output member and is disposed on the same axis as the input shaft IS to transmit the shifted driving force to the driving shaft through a differential (not shown).

The first planetary gear set PG1 is a single pinion planetary gear set, and includes a first sun gear S1 that is a first rotation element N1 and a plurality of first pinions externally meshed with the first sun gear S1. The first planet carrier PC1, which is a second rotation element N2 that rotates and supports the gear P1 so as to be able to rotate and revolve, and the plurality of first pinion gears P1 are internally meshed with the first sun gear and a first ring gear R1 that is a third rotation element N3 that is power-connected to S1.

The compound planetary gear set (CPG) is a combination of a second planetary gear set (PG2) composed of a single pinion planetary gear set and a third planetary gear set (PG3) composed of a double pinion planetary gear set, but a ring gear and a planetary carrier It consists of a planetary gear set of a rabbit type that shares

Accordingly, it operates with four rotational elements including the ring gear, the planetary carrier, and the two sun gears. , a third sun gear S3 as a fifth rotation element N5 meshed with the plurality of short pinion gears P3, and a plurality of long pinion gears P2 externally meshed with the second sun gear S2; A shared planetary carrier (PC23), which is a sixth rotational element (N6) that rotatably supports a plurality of short pinion gears (P3) externally meshed with the third sun gear (S3) so as to be able to rotate and revolve, and the plurality of long and a shared ring gear R23 which is a seventh rotation element N7 that is internally meshed with the pinion gear P2 and is power-connected to the second and third sun gears S2 and S3.

The fourth planetary gear set PG4 is a single pinion planetary gear set, and includes a fourth sun gear S4 that is an eighth rotation element N8 and a plurality of fourth pinions externally meshed with the fourth sun gear S4. The fourth planet carrier PC4, which is a ninth rotational element N9 that rotatably supports the gear P4 to rotate and revolve, and the plurality of fourth pinion gears P4 are internally meshed with the fourth sun gear and a fourth ring gear R4 that is a tenth rotation element N10 that is power-connected to S4.

Here, in the first and fourth planetary gear sets PG1 , PG4 and compound planetary gear set CPG, the first rotating element N1 is fixedly connected to the ninth rotating element N9, and the fourth rotating element (N4) is fixedly connected to the eighth rotation element (N8) operates while holding a total of eight shafts (TM1 ~ TM8).

The configuration of the eight axes TM1 to TM8 will be described in detail as follows.

The first axis TM1 is a tenth rotation element {N10; It is fixedly connected to the fourth ring gear R4} and is always operated as an input element by being fixedly connected to the input shaft IS.

The second axis TM2 is a second rotation element {N2; It is fixedly connected to the first planet carrier (PC1)} and is connected to the output shaft OS so as to always operate as an output element.

The third axis TM3 is a first rotation element {N1; The first sun gear S1} and the ninth rotation element {N 9; It is fixedly connected to the fourth planet carrier (PC4)}.

The fourth axis TM4 is a fourth rotation element {N4; the second sun gear S2} and the eighth rotation element {N8; It is fixedly connected to the fourth sun gear (S4)}.

The fifth shaft TM5 is fixedly connected to a sixth rotation element (N6: shared planet carrier PC23).

The sixth axis TM6 is a seventh rotation element {N7; It is fixedly connected with the shared ring gear R23}.

The seventh axis TM7 is a fifth rotation element {N5; It is fixedly connected to the third sun gear S3}.

The eighth axis TM8 is a third rotation element {N3; It is fixedly connected to the first ring gear R1}.

Here, the eight shafts TM1 to TM8 are rotations connected to fixedly or selectively connect a plurality of rotation elements among the rotation elements of the planetary gear sets PG1, PG2, PG3, and PG4. It may be a rotating member that transmits power while rotating with the element, a rotating member that selectively connects the rotating element with the transmission housing (H), or a fixing member that directly connects and fixes the rotating element with the transmission housing (H) can be

In addition, in the above description, a fixedly connected or similar term means that a plurality of rotation elements connected through a corresponding shaft including an input shaft and an output shaft are connected so that the corresponding shaft rotates without a difference in the number of rotations. That is, the plurality of fixedly connected rotating elements and the corresponding shaft rotate in the same rotational direction and rotational speed.

In addition, in the above description, selectively connected or similar terms mean that a plurality of shafts, including an input shaft and an output shaft, are rotatably connected to the same rotational direction and number of rotations through the coupling element, or the corresponding shaft is the coupling element means to be fixedly connected to the transmission housing through the

That is, when the coupling element selectively connects a plurality of shafts, when the coupling element operates, the plurality of shafts rotate in the same rotational direction and number of rotations, and when the coupling element is released, the connection of the plurality of shafts is released.

In addition, when the coupling element selectively connects the shaft and the transmission housing, when the coupling element operates, the shaft is fixedly connected to and fixed to the transmission housing, and when the coupling element is released, the shaft becomes rotatable.

In addition, the second axis TM2 is selectively connected to the fifth axis TM5 and the sixth axis TM6 to be power-connected, and the third axis TM3 is selectively connected to the seventh axis TM7 . to be power-connected, and the sixth shaft TM6 is selectively connected to the eighth shaft TM8 to be power-connected.

In addition, the seventh shaft TM7 and the eighth shaft TM8 are selectively connected to the transmission housing H and operated as a selective fixing element.

And, among the eight shafts TM1 to TM8, the four coupling elements, the clutches C1, C2, C3, C4) is placed.

Also, among the eight shafts TM1 to TM8, two brakes B1 and B2 are disposed at a portion where the shaft and the transmission housing H are selectively connected.

That is, the arrangement positions of the four clutches C1 to C4 and the two brakes B1 to B2, which are the six coupling elements, are as follows.

The first clutch C1 is disposed between the second shaft TM2 and the fifth shaft TM5 to selectively connect the second shaft TM2 and the fifth shaft TM5 to transmit power.

The second clutch C2 is disposed between the second shaft TM2 and the sixth shaft TM6 to selectively connect the second shaft TM2 and the sixth shaft TM6 to transmit power.

The third clutch C3 is disposed between the third shaft TM3 and the seventh shaft TM7 to selectively connect the third shaft TM3 and the seventh shaft TM7 to transmit power.

The fourth clutch C4 is disposed between the sixth shaft TM6 and the eighth shaft TM8 to selectively connect the sixth shaft TM6 and the eighth shaft TM8 to transmit power.

The first brake B1 is disposed between the seventh shaft TM7 and the transmission housing H to selectively connect and fix the seventh shaft TM7 to the transmission housing H.

The second brake B2 is disposed between the eighth shaft TM8 and the transmission housing H to selectively connect and fix the eighth shaft TM8 to the transmission housing H.

In the above, each coupling element consisting of the first, second, third and fourth clutches C1, C2, C3, and C4 and the first and second brakes B1 and B2 is supplied from the hydraulic control device. It can consist of a multi-plate hydraulic friction coupling unit operated by the hydraulic pressure of It can be made of a coupling unit that can be operated according to the.

2 is an operation table for each gear stage of a coupling element acting on a planetary gear train according to an embodiment of the present invention.

Referring to FIG. 2 , in the planetary gear train according to the embodiment of the present invention, the first, second, third, and fourth clutches C1, C2, C3, and C4, which are coupling elements at each gear stage, and the second Among the first and second brakes B1 and B2, three are operated while shifting up to the 9th forward speed and the 1st reverse gear shift stage. The shifting process according to an example is as follows.

In the forward first speed shift stage D1, the third and fourth clutches C3 and C4 and the second brake B2 are simultaneously operated.

Accordingly, the third shaft TM3 is fixedly connected to the seventh shaft TM7 by the operation of the third clutch C3 , and the sixth shaft TM6 is connected to the eighth shaft by the operation of the fourth clutch C4 . It is inputted to the first axis TM1 in a state in which it is fixedly connected to TM8.

And in the above input state, the eighth shaft TM8 operates as a fixed element by the operation of the second brake B2, and the shift is made to the forward first speed, and output is made through the output shaft OS connected to the second shaft TM2. do.

In the forward second gear stage D2, the second and third clutches C2 and C3 and the second brake B2 are simultaneously operated.

Accordingly, the second shaft TM2 is fixedly connected to the sixth shaft TM6 by the operation of the second clutch C2 , and the third shaft TM3 is connected to the seventh shaft by the operation of the third clutch C3 . In a state in which it is fixedly connected to TM7 , the first axis TM1 is formed.

And in the above input state, the eighth shaft TM8 operates as a fixed element by the operation of the second brake B2, and the speed is shifted to the forward second speed, and output is made through the output shaft OS connected to the second shaft TM2. do.

In the forward three-speed shift stage D3, the first and third clutches C1 and C3 and the second brake B2 are simultaneously operated.

Accordingly, the second shaft TM2 is fixedly connected to the fifth shaft TM5 by the operation of the first clutch C1 , and the third shaft TM3 is connected to the seventh shaft by the operation of the third clutch C3 . In the fixed connection state with the TM7, the first axis TM1 is formed.

And in the above input state, the eighth shaft TM8 operates as a fixed element by the operation of the second brake B2, and the shift is made to the third forward speed, and output is made through the output shaft OS connected to the second shaft TM2. do.

In the forward 4 speed shift stage D4, the first and second clutches C1 and C2 and the second brake B2 are simultaneously operated.

Accordingly, in a state in which the second shaft TM2 is fixedly connected to the fifth shaft TM5 and the sixth shaft TM6 by the operation of the first and second clutches C1 and C2, respectively, the first shaft TM1 ) is entered.

And in the above input state, the eighth shaft TM8 operates as a fixed element by the operation of the second brake B2, and the shift is made to the forward 4 speed, and output is made through the output shaft OS connected to the second shaft TM2. do.

In the forward 5 speed shift stage D5, the first clutch C1 and the first and second brakes B1 and B2 are simultaneously operated.

Accordingly, in a state in which the second shaft TM2 is fixedly connected to the fifth shaft TM5 by the operation of the first clutch C1 , an input is made to the first shaft TM1 .

And in the above input state, the seventh and eighth shafts TM7 and TM8 operate as fixed elements by the operation of the first and second brakes B1 and B2, and the shift is made to forward 5 speed, so that the second shaft It is output through the output shaft (OS) connected to (TM2).

In the forward 6-speed shift stage D6, the first and fourth clutches C1 and C4 and the second brake B2 are simultaneously operated.

Accordingly, the second shaft TM2 is fixedly connected to the fifth shaft TM5 by the operation of the first clutch C1 , and the sixth shaft TM6 is connected to the eighth shaft by the operation of the fourth clutch C4 . In the state of being fixedly connected to TM8, an input is made to the first axis TM1.

And in the above input state, the 8th shaft TM8 operates as a fixed element by the operation of the second brake B2, and the speed is shifted to the 6th forward speed, and output through the output shaft OS connected to the second shaft TM2 do.

In the forward 7-speed shift stage D7, the first and fourth clutches C1 and C4 and the first brake B1 are simultaneously operated.

Accordingly, the second shaft TM2 is fixedly connected to the fifth shaft TM5 by the operation of the first clutch C1 , and the sixth shaft TM6 is connected to the eighth shaft by the operation of the fourth clutch C4 . In the state of being fixedly connected to TM8, an input is made to the first axis TM1.

And in the above input state, the seventh shaft TM7 operates as a fixed element by the operation of the first brake B1, and the shift is made to the seventh forward speed, and output is made through the output shaft OS connected to the second shaft TM2. do.

In the forward eight-speed shift stage D8, the first, second, and fourth clutches C1, C2, and C4 are simultaneously operated.

Accordingly, the second shaft TM2 is fixedly connected to the fifth shaft TM5 and the sixth shaft TM6 by the operation of the first and second clutches C1 and C2, respectively, and the sixth shaft TM6 By the operation of the fourth clutch C4, the eighth shaft TM8 and each are in a fixed connection state.

Then, the first and fourth planetary gear sets PG1 , PG4 and the compound planetary gear set CPG are in a state where the entirety rotates as one, and when an input is made to the first shaft TM1, the forward movement is output as it is. It is shifted to the 8th speed and is output through the output shaft OS connected to the second shaft TM2.

In the forward 9-speed shift stage D9, the second and fourth clutches C2 and C4 and the first brake B1 are simultaneously operated.

Accordingly, the second shaft TM2 is fixedly connected to the sixth shaft TM6 by the operation of the second clutch C2, and the sixth shaft TM6 is connected to the eighth shaft by the operation of the fourth clutch C4. In the state of being fixedly connected to TM8, an input is made to the first axis TM1.

And in the above input state, the seventh shaft TM7 operates as a fixed element by the operation of the first brake B1, and the speed is shifted to the 9th forward speed, and output through the output shaft OS connected to the second shaft TM2 do.

In the reverse gear stage REV, the third and fourth clutches C3 and C4 and the first brake B1 are simultaneously operated.

Accordingly, the third shaft TM3 is fixedly connected to the seventh shaft TM7 by the operation of the third clutch C3 , and the sixth shaft TM6 is connected to the eighth shaft by the operation of the fourth clutch C4 . It is inputted to the first axis TM1 in a state in which it is fixedly connected to TM8.

And in the above input state, the seventh shaft TM7 operates as a fixed element by the operation of the first brake B1, and the shift is performed in the reverse direction, and the reverse rotation is output through the output shaft OS connected to the second shaft TM2. do.

As described above, the planetary gear train according to the embodiment of the present invention includes four planetary gear sets PG1, PG2, PG3, PG4, four clutches C1, C2, C3, and C4. Through the operation control of the brakes B1 and B2, the 9 forward speed and 1 reverse speed can be realized.

In addition, the planetary gear train according to an embodiment of the present invention can implement a shift stage suitable for the rotation speed of the engine by multiplying the shift stage of the automatic transmission. can improve driving quietness.

In addition, the planetary gear train according to an embodiment of the present invention can maximize engine operation efficiency by multi-stage automatic transmission, and can improve power transmission performance and fuel efficiency.

Although the above has been described with reference to a preferred embodiment of the present invention, those of ordinary skill in the art can variously modify and modify the present invention within the scope without departing from the spirit and scope of the present invention described in the claims below. You will understand that it can be changed.

B1, B2... 1st, 2nd brakes
C1, C2, C3, C4... 1st, 2nd, 3rd, 4th clutch
CPG... Composite Planetary Gear Set
PG1, PG2, PG3, PG4... 1st, 2nd, 3rd, 4th planetary gear set
S1, S2, S3, S4... 1st, 2nd, 3rd, 4th sun gear
PC1, PC4... 1st, 4th planet carrier
PC23... Shared Planetary Carrier
R1, R4... 1st, 4th ring gear
R23... shared ring gear
IS... input shaft
OS... output shaft
TM1, TM2, TM3, TM4, TM5, TM6, TM7, TM8... 1st, 2nd, 3rd, 4th, 5th, 6th, 7th, 8th axis

Claims (11)

an input shaft receiving power from the engine;
an output shaft for outputting power;
a first planetary gear set in which the first, second, and third rotation elements include a first sun gear, a first planet carrier, and a first ring gear;
a compound planetary gear set in which the fourth, fifth, sixth, and seventh rotation elements are a second sun gear, a third sun gear, a shared planetary carrier, and a shared ring gear by a combination of the second and third planetary gear sets;
a fourth planetary gear set in which the eighth, ninth, and tenth rotation elements include a fourth sun gear, a fourth planetary carrier, and a fourth ring gear;
a first shaft fixedly connected to the tenth rotation element and the input shaft;
a second shaft fixedly connected to the second rotation element and fixedly connected to the output shaft;
a third shaft fixedly connected to the first rotating element and the ninth rotating element;
a fourth shaft fixedly connected to the fourth rotating element and the eighth rotating element;
a fifth shaft fixedly connected to the sixth rotating element;
a sixth shaft fixedly connected to the seventh rotation element; and
a plurality of shafts made of a combination of the remaining non-connected rotating elements among the rotating elements of the first planetary gear set and the compound planetary gear set and selectively connected to the transmission housing;
A planetary gear train of an automatic transmission for a vehicle comprising a. According to claim 1,
The plurality of axes
a seventh shaft fixedly connected to the fifth rotating element and selectively connected to the transmission housing; and
and an eighth shaft fixedly connected to the third rotating element and selectively connected to the transmission housing,
The second axis and the fifth axis, the second axis and the sixth axis, the third axis and the seventh axis, the sixth axis and the eighth axis are each selectively connected to a planetary gear of an automatic transmission for a vehicle. train. delete 3. The method of claim 2,
The planetary gear train
a first clutch configured between the second shaft and the fifth shaft;
a second clutch configured between the second shaft and the sixth shaft;
a third clutch configured between the third shaft and the seventh shaft;
a fourth clutch configured between the sixth shaft and the eighth shaft;
a first brake configured between the seventh shaft and the transmission housing; and
a second brake configured between the eighth shaft and the transmission housing;
A planetary gear train of an automatic transmission for a vehicle further comprising a. According to claim 1,
The first and fourth planetary gear sets consist of a single pinion planetary gear set,
The complex planetary gear set is a planetary gear train of an automatic transmission for a vehicle comprising a combination of a single pinion planetary gear set and a double pinion planetary gear set. According to claim 1,
The first and fourth planetary gear sets and the compound planetary gear sets are
A planetary gear train of an automatic transmission for a vehicle disposed in the order of a fourth planetary gear set, a compound planetary gear set, and a first planetary gear set from an engine side. an input shaft receiving power from the engine;
an output shaft for outputting power;
a first planetary gear set having first, second, and third rotating elements;
a compound planetary gear set having fourth, fifth, sixth, and seventh rotation elements by a combination of the second and third planetary gear sets;
and a fourth planetary gear set having eighth, ninth and tenth rotating elements,
The first rotating element is fixedly connected to the ninth rotating element,
The second rotating element is fixedly connected to the output shaft,
the third rotating element is selectively connected to the transmission housing;
The fourth rotating element is fixedly connected to the eighth rotating element,
The fifth rotating element is selectively connected to the ninth rotating element and the transmission housing, respectively,
The sixth rotating element is selectively connected to the second rotating element,
The seventh rotation element is selectively connected to each of the second rotation element and the third rotation element,
The tenth rotation element is a planetary gear train of an automatic transmission for a vehicle that is fixedly connected to the input shaft. delete 8. The method of claim 7,
The planetary gear train
a first clutch configured between the second rotating element and the sixth rotating element;
a second clutch configured between the second rotating element and the seventh rotating element;
a third clutch configured between the fifth rotating element and the ninth rotating element;
a fourth clutch configured between the third rotating element and the seventh rotating element;
a first brake configured between the fifth rotating element and the transmission housing; and
a second brake configured between the third rotating element and the transmission housing;
A planetary gear train of an automatic transmission for a vehicle further comprising a. 8. The method of claim 7,
The first planetary gear set consists of a single pinion planetary gear set, and the first, second, and third rotation elements are composed of a first sun gear, a first planetary carrier, and a first ring gear;
The compound planetary gear set is composed of a combination of a single pinion planetary gear set and a double pinion planetary gear set, and the fourth, fifth, sixth, and seventh rotation elements are a second sun gear, a third sun gear, a shared planetary carrier, and a shared made of ring gear,
The fourth planetary gear set is a single pinion planetary gear set, and the eighth, ninth and tenth rotation elements are a fourth sun gear, a fourth planetary carrier, and a fourth ring gear. 8. The method of claim 7,
The first and fourth planetary gear sets and the compound planetary gear sets are
A planetary gear train of an automatic transmission for a vehicle disposed in the order of a fourth planetary gear set, a compound planetary gear set, and a first planetary gear set from an engine side.

Images