JPH06272749A - Automatic transmission for vehicle - Google Patents

Abstract

PURPOSE:To provide an automatic transmission for vehicle which can improve the lubricating performance of a direct clutch and cope with even a vehicle where a high output engine is installed. CONSTITUTION:This automatic transmission is provided, in the drum 21a of a forward clutch C1, with a through hole 25 which feeds hydraulic oil in the forward clutch C1 to a direct clutch C2 from the forward clutch C1 as lubricating oil in the direct clutch C2.

Description

Detailed Description of the Invention

[0001]

[Object of the Invention]

[0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle automatic transmission.

[0003]

2. Description of the Related Art Heretofore, as an automatic transmission for a vehicle of this kind, one described in "Alto / Fronte Service Manual Maintenance Edition" issued on Nov. 1988 is known. This is a forward coupling in which the input shaft shaft and the output shaft shaft are connected via a gear mechanism having at least three degrees of freedom, and at least one degree of freedom shaft of the gear mechanism is disengaged from the input shaft. An automatic transmission having a clutch and a direct clutch arranged in parallel with the forward clutch for engaging and disengaging another degree-of-freedom node of a gear mechanism with respect to an input shaft shaft. This was done by means of lubricating oil supplied by a supply circuit.

[0004]

In recent years, the transmission torque rotational speed in the operating range of the direct clutch, which operates at a high shift speed, has been increased with the increase in output of the engine. However, in the above-mentioned conventional device, since the direct clutch is lubricated only by the supply of the lubricating oil supplied by the normal lubricating oil supply circuit, in the vehicle equipped with the above-mentioned high-power engine, the direct clutch is directly operated. The supply of lubricating oil to the clutch tends to be insufficient, which may result in burning of the clutch plate.

Therefore, it is a technical object of the present invention to provide an automatic transmission for a vehicle which improves the lubrication performance of a direct clutch and can be applied to a vehicle equipped with a high-power engine.

[0006]

[Constitution of the invention]

[0007]

In order to solve the above-mentioned technical problems, the technical means taken in the present invention are as follows: The working oil of the forward clutch is formed on the drum of the forward clutch as the lubricating oil of the direct clutch. A through hole is provided to supply the direct clutch from the forward clutch.

[0008]

According to the above technical means, the direct clutch is lubricated by using the operating oil of the forward clutch supplied from the forward clutch to the direct clutch through the through hole as the lubricating oil of the direct clutch. It will be. As a result, the lack of supply of lubricating oil for the direct clutch is resolved, and the lubricating performance of the direct clutch is improved. Therefore, the vehicle automatic transmission can be applied to a vehicle equipped with a high-power engine.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the accompanying drawings.

As shown in FIG. 1, the automatic transmission includes an input shift gear 1, an output shift gear 2, a front gear mechanism 3, a rear gear mechanism 4, and a forward clutch C.
1, direct clutch C 2, one-way clutch F
1, a first brake B1 and a cand brake B2.

The input shaft 1 and the output shaft 2 are coaxially rotatably arranged, and the input shaft 1 is mounted on a vehicle engine (not shown) via a well-known torque converter (not shown). Is connected to
The output shaft 2 is connected to drive wheels (not shown) of the vehicle via a well-known differential mechanism (not shown).

The front gear mechanism 3 comprises a sun gear 31, a planetary gear 32 that meshes with the sun gear 31, and a ring gear 33 that meshes with the planetary gear 32. The sun gear 31 is rotatably supported on the output shaft 2 and is connected to the input shaft 1 via a direct clutch C2. The planetary gear 32 is rotatably supported by a carrier 34, and is connected to and supported by the output shaft 2 by the carrier 34. The ring gear 33 is rotatably supported on the output shaft 2 and has a forward clutch C1.
Is connected to the input shaft 1 via.

The rear gear mechanism 4 comprises a sun gear 41, a planetary gear 42 that meshes with the sun gear 41, and a ring gear 43 that meshes with the planetary gear 42.
The sun gear 41 is integral with the sun gear 31 of the front gear mechanism 3, is rotatably supported on the output shaft 2 like the sun gear 31, and is connected to the input shaft 1 via the direct clutch C2. The planetary gear 42 is rotatably supported by the carrier 44, and is connected and supported by the carrier 44 via the one-way clutch F1 and the second brake B2 by the carrier 44. The ring gear 43 is connected and supported so as to rotate integrally with the output shaft 2.

The first brake B1 is the sun gear 3
1 and 41 and the direct clutch C2, the sun gears 31 and 41 can be connected to and supported by the shift case 5.

In the above structure, the forward clutch C1, the direct clutch C2, the one-way clutch F1, the first brake B1 and the second brake B.
2 is connected to a known hydraulic oil supply circuit (not shown), and the hydraulic oil is selectively supplied by the operation of the hydraulic oil supply circuit to operate as shown in FIG.
The automatic transmission shifts. Furthermore, forward clutch C1, direct clutch C2, one-way clutch F
1, first brake B1 and second brake B2
Is connected to a well-known lubricating oil supply device (not shown) connected to the torque converter, and the operating oil of the torque converter is supplied as lubricating oil to each lubrication necessary portion.

As shown in FIG. 3, the forward clutch C1 and the direct clutch C2 are axially juxtaposed on the input shaft 1.

The forward clutch C1 is composed of a drum 11, a piston 12 and a multi-plate clutch 13. The drum 11 is fixed to the input shaft shaft 1 so as to rotate integrally therewith. Multi-plate clutch 13 is drum 11
And the ring gear 33 of the front gear mechanism 3 are arranged. The piston 12 engages the multi-plate clutch 13 and is arranged on the input shaft 1 so as to be axially movable in the drum 11. Further, a passage 14 is formed in the input shaft 1 so as to communicate with the hydraulic oil supply circuit.
The hydraulic oil can be supplied to the working chamber A formed between the piston 12 and the piston 12. Further, the input shaft 1 and the output shaft 2 are provided with a passage 16 communicating with a lubricating oil supply circuit, and the passage 16 allows the lubricating oil to be supplied into the drum 11.

The direct clutch C2 is composed of a drum 21, a piston 22 and a multi-plate clutch 23. The drum 21 is an inner drum 21a and an outer drum 2
1b, the inner drum 21a is rotatably supported on an oil pump shaft fixed to the mesh case 5, and the outer drum 21b is the inner drum 21b.
It is fixed to a and is also fixed to the sun gears 31 and 41 of the front and rear gear mechanisms 3 and 4. Multi-plate clutch 23
Is disposed between the inner drum 11 and the clutch hub portion 11b fixed to the side wall 11a of the drum 11 of the forward clutch C1. The piston 22 is a multi-plate clutch 2.
3 for engaging the inner drum 21a
It is disposed above the drum 21 so as to be movable in the axial direction. The inner drum 21a is formed with a passage 24 communicating with a hydraulic oil supply circuit, and the passage 24 allows the hydraulic oil to be supplied to a working chamber B formed between the inner drum 21a and the piston 22. To be done. Further, a passage 25 communicating with the hydraulic oil supply circuit is formed in the inner drum 21a, and the passage 25 allows the lubricating oil to be supplied into the drum 21.

As shown in FIGS. 3 and 4, the side wall 11a of the drum 11 of the forward clutch C1 has a through hole 15 for communicating the working chamber A of the forward clutch C1 with the inside of the drum 21 of the direct clutch C2. A part of the hydraulic oil supplied to the working chamber of the forward clutch C1 is supplied to the drum of the direct clutch C2.

In the above-mentioned structure, when the working oil is supplied from the passage 24 to the working chamber B by the working oil supply circuit and the direct clutch C2 is operating (at the 3rd speed stage shown in FIG. 2), the lubricating oil supply circuit The lubricating oil is supplied from the passage 25 into the drum 21 to lubricate the lubrication-needed portion of the direct clutch C2 (such as the multi-plate clutch 23). At this time, the operating oil is supplied from the passage 14 by the operating oil supply circuit. Since the forward clutch C1 is also supplied to the chamber A, a part of the hydraulic oil supplied to the operating chamber A is supplied from the through hole 15 into the drum 21 of the forward clutch C2. Yotsumo Direct Clutch C
The second lubrication required portion (multi-plate clutch 23 etc.) will be lubricated.

As mentioned above, the forward clutch C1
Is supplied to the direct clutch C2 from the forward clutch C1 as the lubricating oil for the direct clutch C2 through the through hole 15. The direct clutch C2 is lubricated by the hydraulic oil of the forward clutch C1 as well as the direct clutch C2. It will be used as a lubricating oil. As a result, the lack of supply of lubricating oil to the direct clutch C2 is resolved, and the direct clutch C2
The lubrication performance of is improved. Therefore, for example, even when the automatic transmission is used in a vehicle equipped with a high-output engine in which the rotational speed in the operating range of the direct clutch C2 that operates at a high shift speed is increased, the direct clutch is used. The burning of the C2 multi-plate clutch 23 is eliminated.

The hydraulic oil of the forward clutch C1 supplied to the direct clutch C2 is in an amount that does not affect the operation of the forward clutch C1.

[0023]

According to the present invention, the hydraulic oil of the forward clutch is supplied from the forward clutch to the direct clutch as the lubricating oil of the direct clutch through the through hole formed in the drum of the forward clutch.
Lubrication of the direct clutch is performed by using the hydraulic oil of the forward clutch as the lubricating oil of the direct clutch. As a result, the supply shortage of the lubricating oil of the direct clutch is resolved, and the lubricating performance of the direct clutch can be improved. Therefore, the vehicle automatic transmission can be applied to a vehicle equipped with a high-power engine.

[Brief description of drawings]

FIG. 1 is a diagram showing a gear train of an automatic transmission for a vehicle according to the present invention.

FIG. 2 is a diagram showing an operating state of the vehicle automatic transmission according to the invention.

FIG. 3 is a partial sectional view of an automatic transmission for a vehicle according to the present invention.

FIG. 4 is an enlarged view of a main part of FIG.

[Explanation of symbols]

1 Input shift 2 Output shift 3 Front gear mechanism (Gear mechanism) 4 Rear gear mechanism (Gear mechanism) C1 Forward clutch C2 Direct clutch 15 Through hole 21 Drum 31,41 Sun gear (another degree of freedom) 32,42 Planetary gear (At least one degree of freedom) 33,34 Ring gear (at least one degree of freedom)

Claims (1)

[Claims] 1. An input shaft and an output shaft are connected via a gear mechanism having at least three degrees of freedom, and at least one degree of freedom of the gear mechanism is connected to the input shaft. An automatic transmission for a vehicle having a forward clutch for disengaging and a direct clutch arranged in parallel with the forward clutch for engaging and disengaging another degree-of-freedom node of the gear mechanism with respect to the input shaft shaft. An automatic transmission for a vehicle having a through hole formed in a drum of a clutch and configured to supply the hydraulic oil of the forward clutch as a lubricating oil of the direct clutch from the forward clutch to the direct clutch.