Axial-piston machine with improved bearing arrangement

Claim 2

In an axial-piston machine comprising a housing, a cylinder drum rotatable in said housing about a first axis and having a plurality of pistons reciprocable parallel to said axis, a shaft journaled in said housing for rotation about a second axis inclined to said first axis, a drive flange in said housing secured to said shaft and lying in a plane perpendicular to said second axis and inclined to said first axis, said pistons reacting via piston rods against said drive flange, the improvement which comprises bearing means in said housing acting directly upon said drive flange and taking up all of the radial and axial forces thereon, said bearing means including two oppositely directed axially effective roller thrust bearings acting upon opposite sides of said drive flange and reacting against said housing, said axially effective bearings being applied against said drive flange under axial prestress; and a spring acting upon one of said axially effective bearings for applying said prestress to said axially effective bearings and said drive flange.

Claim 3

The improvement defined in claim 1 wherein said bearing means includes a single radial bearing supporting said drive flange.

Claim 4

The improvement defined in claim 2 wherein said radial bearing is provided around the periphery of said drive flange.

Claim 5

The improvement defined in claim 1 wherein said bearing means includes a radial bearing separate from said thrust bearings for taking up radial forces applied to said drive flange.

Claim 6

An axial piston machine comprising a housing, a cylinder drum rotatable in said housing about a first axis and having a plurality of angularly spaced cylinders formed in said drum generally parallel to said axis, a drive flange inclined to said axis and having the configuration of a substantially flat disk journaled in said housing, respective pistons reciprocally received in said cylinders and being formed with piston rods bearing upon said drive flange at one side thereof, a shaft fixed to said flange and generally perpendicular to said disk at said shaft extending out of said housing, and bearing means for journaling said disk and said shaft in said housing, said housing being formed with annular seats confronting opposite faces of said disk, said bearing means including a first axially effective annular bearing between one of said seats and the respective face of said disk, a second axially effective annular bearing between the other of said seats and the other of said faces of said disk whereby said disk is directly sandwiched between said axially effective bearings, said disk being formed with a cylindrical portion, and a radially effective annular bearing engaging said cylindrical portion of said disk, said radially effective bearing and the axially effective bearing at said one of said sides being disposed outwardly of the region in which said piston rods bear upon said flange, the distance between said bearings and said regions and the distances between the respective bearings being less than the diameter of said disk.

Claim 7

An axial piston machine comprising a housing, a cylinder drum rotatable in said housing about a first axis and having a plurality of angularly spaced cylinders formed in said drum generally parallel to said axis, a drive flange inclined to said axis and having the configuration of a substantially flat disk journaled in said housing, respective pistons reciprocally received in said cylinders and being formed with piston rods bearing upon said drive flange at one side thereof, a shaft fixed to said flange and generally perpendicular to said disk at said shaft extending out of said housing, and bearing means for journaling said disk and said shaft in said housing, said housing being formed with annular seats confronting opposite faces of said disk, said bearing means including a first axially effective annular bearing between one of said seats and the respective face of said disk, a second axially effective annular bearing between the other of said seats and the other of said faces of said disk whereby said disk is directly sandwiched between said axially effective bearings, said disk being formed with a cylindrical portion, and a radially effective annular bearing engaging said cylindrical portion of said disk, said radially effective bearing and the axially effective bearing at said one of said sides being disposed outwardly of the region in which said piston rods bear upon said flange, the distance between said bearings and said regions and the distances between the respective bearings being less than the diameter of said disk.

Claim 8

An axial piston machine comprising a housing, a cylinder drum rotatable in said housing about a first axis and having a plurality of angularly spaced cylinders formed in said drum generally parallel to said axis, a drive flange inclined to said axis and having the configuration of a substantially flat disk journaled in said housing; respective pistons reciprocably received in said cylinders and being formed with piston rods bearing upon said drive flange at one side thereof, a shaft fixed to said flange and generally perpendicular to said disk at said shaft extending out of said housing, and bearing means for journaling said disk and said shaft in said housing, said housing being formed with annular seats confronting opposite faces of said disk at said one side and the opposite side thereof, said bearing means including a first axially effective annular bearing between one of said seats and the respective face of said disk at said one side outwardly of the region at which said piston rods bear upon said flange, and a second axially effective annular bearing between the other of said seats and the other of said faces of said disk whereby said disk is directly sandwiched between said axially effective bearings, said bearing means further being radially effective at said disk.

Claim 9

An axial piston machine comprising a housing, a cylinder drum rotatable in said housing about a first axis and having a plurality of angularly spaced cylinders formed in said drum generally parallel to said axis, a drive flange inclined to said axis and having the configuration of a substantially flat disk journaled in said housing; respective pistons reciprocably received in said cylinders and being formed with piston rods bearing upon said drive flange at one side thereof, a shaft fixed to said flange and generally perpendicular to said disk at said shaft extending out of said housing, and bearing means for journaling said disk and said shaft in said housing, said housing being formed with annular seats confronting opposite faces of said disk at said one side and the opposite side thereof, said bearing means including a first axially effective annular bearing between one of said seats and the respective face of said disk at said one side outwardly of the region at which said piston rods bear upon said flange, and a second axially effective annular bearing between the other of said seats and the other of said faces of said disk whereby said disk is directly sandwiched between said axially effective bearings, said bearing means further being radially effective at said disk.