JPH06137387A - Hydraulic double clutch - Google Patents

Abstract

PURPOSE:To make the locking of a first clutch part desirable by forming a second spline part, smaller in diameter than a first spline part, adjacently to this opening part side first spline part for engaging a clutch plate with a first clutch drum, and engaging a second clutch drum with this second spline part. CONSTITUTION:When pressure oil is fed to a first oil chamber 10, a second clutch drum 7 is pushed to move onto the opening part side of a first clutch drum 6, and the clutch plates 4a of a first clutch part 4 are pressed by the second clutch drum 7 to lock the first clutch part 4. The second clutch drum 7 is engaged with a second spline part 13 smaller in diameter than a first spline part 12. The clutch plate 4a part opposed to the opening part end face of the second clutch drum 7 is thereby dislocated inward from the outer peripheral part of the clutch plate 4a to be the engaged place to the first spline part 12, so that the clutch plate 4a is brought into pressure contact with the inner clutch plate 4b without being inclined. The first clutch part 4 is thereby locked desirably.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hydraulic double clutch used in an automatic transmission or the like and having a pair of first and second clutch portions.

[0002]

2. Description of the Related Art Conventionally, as this type of double clutch,
According to Japanese Patent Application Laid-Open No. 2-146345, a second clutch drum, which is a drum of a second clutch portion, is provided in a first clutch drum, which is a drum of a first clutch portion, with an opening in the same direction as an opening portion of the first clutch drum. The second clutch drum is housed so as to face, and the second clutch drum is spline-engaged with the first clutch drum on the outer periphery thereof, and the clutch plate of the second clutch part spline-engaged with the second clutch drum is built in the second clutch drum. It is pressed by a piston that responds to the hydraulic pressure to fasten the second clutch portion, and
The clutch drum is hydraulically pushed toward the opening side of the first clutch drum, and the second clutch drum presses the clutch plate of the first clutch section that is spline-engaged with the portion near the opening of the first clutch drum. It is known that the first clutch portion is engaged. In this structure, a straight spline portion extending from the opening of the first clutch drum to the sliding portion of the second clutch drum is formed, and the clutch plate of the first clutch portion and the second clutch drum are formed on the spline portion. Are engaged.

[0003]

As described above, when the clutch plate and the second clutch drum are engaged with the common spline portion as described above, the second clutch drum faces the portion near the outer periphery of the clutch plate to form the second clutch drum. The pressing force from the clutch drum acts unevenly on the outer peripheral side of the clutch plate,
The clutch plate is tilted, and the clutch plate on the inner side is not properly frictionally engaged, and uneven wear is likely to occur. In view of the above points, the present invention provides a hydraulic double clutch in which the second clutch drum is brought into contact with the radial intermediate portion of the clutch plate of the first clutch portion so that the first clutch portion can be satisfactorily engaged. Its purpose is to provide.

[0004]

[Means for Solving the Problems] In order to achieve the above object,
The present invention is a hydraulic double clutch including a pair of first and second clutch portions, wherein a second clutch serving as a drum of a second clutch portion is provided in a first clutch drum serving as a drum of the first clutch portion. The drum is housed so that the opening portion faces the same direction as the opening portion of the first clutch drum, the second clutch drum is spline-engaged with the first clutch drum at its outer periphery, and the second clutch drum is hydraulically moved to the first position. A second clutch drum that presses the clutch plate of the first clutch portion, which is pushed toward the opening portion of the clutch drum and is spline-engaged with the opening portion of the first clutch drum, A second clutch having a smaller diameter than the first spline portion adjacent to the first spline portion near the opening for engaging the clutch plate of the first clutch portion with the first clutch drum. Forming a spline portion, characterized in that engaging the second clutch drum to the second spline portion.

[0005]

The second spline portion for engaging the second clutch drum is formed to have a smaller diameter than the first spline portion for engaging the clutch plate of the first clutch portion.
The clutch drum comes into contact with the radial intermediate portion of the clutch plate, the inclination of the clutch plate is prevented, and the first clutch portion is properly fastened.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to FIG. 1, reference numeral 1 is an input shaft of an automatic transmission, on which a planetary gear mechanism 2 and a hydraulic double clutch 3 for controlling the same are provided. The double clutch 3
Is provided with a pair of first and second clutch portions 4 and 5 that connect a ring gear 2c and a sun gear 2d, which mesh with a planet gear 2b pivotally supported by the carrier 2a, to the input shaft 1, respectively. A first clutch drum 6 serving as a drum of the first clutch unit 4 is spline-engaged with the input shaft 1 at an inner peripheral hub 6a attached to an end wall of the first clutch drum 6, and a drum of the second clutch unit 5 is provided in the first clutch drum 6. The second clutch drum 7 is housed so that the opening faces the same direction as the opening of the first clutch drum 6, and the second clutch drum 7 is spline-engaged with the first clutch drum 6 on the outer periphery thereof. .

At a portion of the first clutch drum 6 near the opening, the clutch plate 4a of the first clutch portion 4 is attached to the ring gear 2a, and the inner clutch plate 4b.
The second clutch drum 7 has a piston 8 incorporated therein and is positioned near the opening of the second clutch drum 7 so that the clutch plate 5a of the second clutch portion 5 is engaged. Are spline-engaged so as to sandwich the inner clutch plate 5b mounted on the flange member 9 fixed to the sun gear 2b. The first oil chamber 10 is provided between the end wall of the first clutch drum 6 and the end wall of the second clutch drum 7, and the second oil chamber 10 is provided between the end wall of the second clutch drum 7 and the piston 8. When the pressure oil is supplied to the first oil chamber 10, the second clutch drum 7 pushes toward the opening side of the first clutch drum 6, and the clutch plate of the first clutch unit 4 is defined. 4a is pressed by the second clutch drum 7, the first clutch portion 4 is fastened, and when pressure oil is supplied to the second oil chamber 11, the piston 8 is pushed toward the opening portion side of the second clutch drum 7. Then, the clutch plate 5a of the second clutch unit 5
Is pressed by the piston 8 and the second clutch portion 5 is fastened.

Both the clutch drums 6 and 7 are made of sheet metal press-molded products, and the first clutch drum 6 is used.
In addition, a first spline portion 12 near the opening for engaging the clutch plate 4a of the first clutch portion 4 and a second spline portion 13 adjacent to the first spline portion 12 and having a diameter smaller than that of the first spline portion 12 are arranged in a stepped manner. The second clutch drum 7 is press-formed by using a toothed punch having an attached shape, and the second clutch drum 7 is press-formed by the spline portion 14 near the opening for engaging the clutch plate 5a of the second clutch portion 5. The outer surface of the spline portion 14 was engaged with the second spline portion 13 as shown in FIG.

As described above, by engaging the second clutch drum 7 with the second spline portion 13 having a diameter smaller than that of the first spline portion 12, the portion of the clutch plate 4a facing the opening end surface of the second clutch drum 7. Shifts inward from the outer peripheral portion of the clutch plate 4a, which is the engagement point for the first spline portion 12, and the clutch plate 4a is pressed by the second clutch drum 7 at the radial intermediate portion thereof to the inner side clutch plate 4b. The clutch plate 4a is pressure-contacted without tilting, and the first clutch portion 4 is properly fastened.

In the figure, reference numeral 15 is a return spring for urging the piston 8 and the second clutch drum 7 in the backward direction, and 16
Is a pulsar tooth profile formed in a portion near the end wall of the first clutch drum 6, and a pickup 18 facing the tooth profile 16 is attached to the transmission case 17 to detect the rotation speed.

[0011]

As is apparent from the above description, according to the present invention, the clutch plate of the first clutch portion which is spline-engaged with the first clutch drum is abutted against the second clutch drum at the radially intermediate portion thereof. The first clutch portion can be satisfactorily engaged without tilting or uneven wear of the clutch plate.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of an example of a clutch of the present invention.

FIG. 2 is a cross-sectional view taken along the line II-II of FIG.

[Explanation of symbols]

3 Hydraulic Double Clutch 4 First Clutch Part 4a Clutch Plate 5 Second Clutch Part 6 First Clutch Drum 7 Second Clutch Drum 12 First Spline Part 13 Second Spline Part

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yoichi Kojima 1-4-1 Chuo, Wako-shi, Saitama, Ltd. Inside Honda R & D Co., Ltd.

Claims (1)

[Claims] 1. A hydraulic double clutch comprising a pair of first and second clutch parts, wherein a second clutch part has a drum inside the first clutch part and a second clutch part has a second clutch part. The clutch drum is housed so that the opening portion faces the same direction as the opening portion of the first clutch drum, the second clutch drum is spline-engaged with the first clutch drum at its outer periphery, and the second clutch drum is hydraulically moved to the first position. In the one in which the clutch plate of the first clutch portion, which is pushed toward the opening portion of the one-clutch drum and is spline-engaged with the opening portion of the first clutch drum, is pushed by the second clutch drum, The first clutch drum is adjacent to the first spline portion near the opening for engaging the clutch plate of the first clutch portion, and has a diameter smaller than that of the first spline portion. A hydraulic double clutch, wherein two spline parts are formed and a second clutch drum is engaged with the second spline part.