Double clutch apparatus for a transmission

Patent metadata

Field	Value
Publication number	US-10316903-B2
Application number	US-201715717685-A
Country	US
Kind code	B2
Filing date	Sep 27, 2017
Priority date	Dec 14, 2016
Publication date	Jun 11, 2019
Grant date	Jun 11, 2019

Abstract

A double clutch apparatus for selectively transmitting a torque of an engine output shaft to first and second input shafts may include a clutch housing connected to the engine output shaft, external and internal clutches radially superposed and respectively connected to the first and second input shafts, first and second operation pistons operated by a dual slave cylinder to respectively operate the external clutch and the internal clutch, a hydraulic pump connected to a driven gear by a rotation shaft, a pump driveshaft disposed coaxially with and external to the second input shaft, the pump driveshaft being formed with a drive gear engaged with the driven gear, and a connecting shaft fixed to a radially internal end portion of the second operation piston and spline-engaged with an internal circumference of the pump driveshaft.

First claim

What is claimed is:

1. A double clutch apparatus for selectively transmitting a torque of an engine output shaft to first and second input shafts, the double clutch apparatus comprising:
a clutch housing formed within a transmission housing and connected to the engine output shaft;
an external clutch and an internal clutch radially superposed within the clutch housing and respectively connected to the first and second input shafts;
first and second operation pistons that are disposed penetrating the clutch housing and respectively operate the external clutch and the internal clutch;
a dual slave cylinder formed at the transmission housing and selectively operating the first and second operation pistons;
a hydraulic pump formed at a radial wall of the transmission housing and connected to a driven gear by a rotation shaft;
a pump driveshaft formed as a hollow shaft coaxially disposed at an external circumference of the second input shaft without a rotational interference therebetween, the pump driveshaft being formed with a drive gear engaged with the driven gear; and
a connecting shaft fixed to a radially internal end portion of the second operation piston and spline-engaged with an internal circumference of the pump driveshaft.

2. The double clutch apparatus of claim 1 , wherein the dual slave cylinder includes:
a first slave cylinder rotatably supported by the first operation piston interposing a first bearing; and
a second slave cylinder rotatably supported by the second operation piston interposing a second bearing.

3. The double clutch apparatus of claim 1 , wherein the hydraulic pump is a mechanical pump formed at the radial wall and the rotation shaft is disposed across the radial wall, and wherein the driven gear and the hydraulic pump are located opposite to each other with respect to the radial wall.

4. The double clutch apparatus of claim 1 , wherein the pump driveshaft is rotatably supported by the radial wall of the transmission housing interposing a bearing.

5. The double clutch apparatus of claim 1 , wherein the connecting shaft is formed as a hollow shaft disposed coaxially with and external to the second input shaft without a rotational interference therebetween.

6. The double clutch apparatus of claim 1 , wherein the clutch housing is connected to the engine output shaft by a drive disk.

7. A double clutch apparatus for a transmission for selectively transmitting a torque of an engine output shaft to first and second input shafts through an external clutch and an internal clutch respectively, the double clutch apparatus comprising:
a hydraulic pump formed at a radial wall of a transmission housing and connected to a driven gear by a rotation shaft; and
a pump driveshaft formed as a hollow shaft coaxially disposed at an external circumference of the second input shaft without a rotational interference therebetween, the pump driveshaft being formed with a drive gear engaged with the driven gear;
a clutch housing formed within the transmission housing, connected to the engine output shaft interposing a drive disk, and including the internal clutch and the external clutch that are radially superposed;
first and second clutch hubs respectively spline-engaged with the first and second input shafts and respectively connected to the external clutch and the internal clutch;
first and second operation pistons that are disposed penetrating the clutch housing and respectively operate the external clutch and the internal clutch;
first and second slave cylinders formed at the transmission housing and respectively operating the first and second operation pistons;
a connecting shaft fixed to a radially internal end portion of the second operation piston and spline-engaged with an internal circumference of the pump driveshaft.

8. The double clutch apparatus of claim 7 , wherein the pump driveshaft is rotatably supported by the radial wall of the transmission housing interposing a bearing.

9. The double clutch apparatus of claim 7 , wherein the connecting shaft is formed as a hollow shaft disposed coaxially with and external to the second input shaft without a rotational interference therebetween.

Assignees

• Hyundai Motor Co Ltd
• Kia Motors Corp

Inventors

• Jeong Euihee
• Park In Tae
• Kim Jong Min
• Lee Jinwoo

Classifications

• F16H61/26

  Generation or transmission of movements for final actuating mechanisms · CPC title

• F16H63/30

  Constructional features of the final output mechanisms · CPC title

• F16H3/006

  power being selectively transmitted by parallel flow paths, e.g. dual clutch transmissions · CPC title

• F16D13/38

  with flat clutching surfaces, e.g. discs · CPC title

• F16D25/08

  with fluid-actuated member not rotating with a clutching member (F16D25/02 takes precedence {F16D25/048 takes precedence}) · CPC title