Transmission with double friction clutch
AssigneeKlockner-Humboldt-Deutz Aktiengesellschaft
InventorWalter Zenker
Life of this patent
Estimating the term…
Abstract
Transmission with double friction clutch, especially transmission for agricultural and/or vehicles for the construction industry, with two gear shifting groups, each one of which can be shifted by means of an associated clutch, with the groups being shiftable under load. One of the clutches is engaged by being spring-biased and engageable by means of a selectively acting pressure medium adapted to operate one or several cylinder/piston units. The effective operating surface of the pertaining piston is greater than the operating surface of the piston associated with the second clutch. The cylinders are connectible in such a way that on each piston in each shift position thereof the same shifting pressure is exerted.
Claims10
A gear change transmission, especially for agricultural vehicles and construction-industry vehicles, having two gear-shifting groups each being actuatable under load by a friction clutching arrangement comprising:
- a first clutch inherently urged to engagement by means of a resilient biasing member and adapted to be disengaged by means of at least one piston-cylinder unit having at least one piston;
- and
- a second clutch adapted to be engaged by means of at least one piston-cylinder unit, having at least one piston, said at least one piston of said second clutch having an effective operating surface area which is less than the effective operating surface area of said at least one piston of said first clutch, with the pertaining cylinders of each of said first clutch and said second clutch being connectible in such a way that said at least one piston of said first clutch and said at least one piston of said second clutch are subjected to the same control pressure in each clutch position, said first clutch and said second clutch forming a double friction clutch, and said at least one piston of said first clutch and said at least one piston of said second clutch being operable in a common cylinder chamber member, said double-row clutch comprising a primary part, said primary part including:
- a hub part;
- a radial member projecting radially from said hub part between said first clutch and said second clutch;
- a cylindrical portion projecting axially from said radial member on that side thereof which faces said second clutch, said cylindrical portion being spaced from said hub and concentric thereto, said cylindrical member and said radial member forming a cup-shaped member with the annular space between said hub and said cylindrical portion forming said cylinder chamber for said at least one piston of said first clutch and said at least one piston of said second clutch;
- said first clutch including secondary clutch lamellae, and primary clutch lamellae, and said second clutch including primary lamellae and secondary lamellae;
- a first contact profile, on said hub radially inwardly of said lamellae of said first clutch on that side of said radial member which faces said first clutch, for engaging said primary lamellae of said first clutch;
- and
- a second contact profile on said cylindrical portion radially outwardly of said lamellae of said second clutch on that side of said radial member which faces said second clutch, for engaging said primary lamellae of said second clutch.
Dependencies are inferred from the claim text.