| 摘要 |
956,219. Friction clutches. DAIMLER. BENZ A.G. Nov. 28, 1962 [Dec. 2, 1961], No. 45061/62. Heading F2C. In a clutch arrangement for a motor vehicle automatic planetary gear-box wherein two friction disc clutches 14, 15 have a common centre abutment 16 and are mounted in a drum 13a formed integral with and to one side of a rotatable flange 11 mounted by a hub 20 on a casing boss 10a, the clutch 15 is controlled to transmit different torques in two different gear ratios by a fluid pressure doubleacting piston 19 connected through a sleeve 18 externally arranged and axially movable on the drum 13a, and formed at its opposite end with a presser plate 17 for actuation of the clutch 15, the piston 19 being arranged on the other side of the flange 11 and formed on each side with large and small piston surface areas 23, 24 which may be independently operated by fluid pressure supplied through a duct 26, or 27, to cylinder chambers 25, or 28, for engagement, for high torque transmission in one gear ratio, or release respectively of the clutch 15, or, may be simulaneously operated to effect a differentially reduced loading of the clutch 15 for transmission of a smaller torque in another ratio, the clutch in this condition being disengaged simply by relieving the pressure on the piston surface 23. The arrangement avoids the use of complicated oil pressure controls, and clutch springs are dispensed with by the double-acting piston which when operated for clutch disengagement, rapidly overcomes centrifugal residual pressure remaining in-the cylinder space 25 after release of the fluid pressure from the piston surface 23. The clutch 14 is independently controlled by a separate single. acting piston mounted on the right-hand side of the flange 11. |
