Press-fit-interlocking connection and belt tensioner having such a connection
AssigneeSchaeffler Technologies AG & Co. KG
InventorsZoran Maricic, Alexander Kurz
Life of this patent
Estimating the term…
Abstract
A press-fit-interlocking connection of an inner part to an outer part which is fastened to the inner part includes a cylindrical press joint (3) between the outer part and the inner part. The interlocking connection is formed by an axial stop having contacting stop parts (18, 19) on the inner part and on the outer part. The connection has an edge support in contact with the stop parts which contact one another, in a first main plane of curvature (E1) to which the cylinder axis of the press joint is perpendicular, with equal radii of curvature (ra1, ra2), and in a second main plane of curvature (E2) in which the cylinder axis of the press joint lies, with different radii of curvature (ra2, ri2).
Claims16
A press-fit-interlocking connection of an inner part to an outer part which is fastened to the inner part, the press-fit-interlocking connection comprising:
- a cylindrical press joint between the outer part and the inner part, the press-fit-interlocking connection being formed by a press fit between an inner circumferential surface of the outer part an outer circumferential surface of the inner part and an axial stop, the axial stop being formed by the inner part extending radially outward into the outer part and contacting a circumferential edge of the outer part.
A belt tensioner of an accessory belt drive comprising a generator having a generator pulley wrapped by a belt, the belt tensioner comprising:
- a bearing flange configured for being fastened to the generator, the bearing flange enclosing an axis of rotation of the generator pulley;
- a first tension arm and a second tension arm, the first and second tension arms each being annular in shape and being mounted on the bearing flange so that the first and second tension arms can pivot relative to one another;
- two tension pulleys attached to the tension arms, the two tension pulleys configured for applying a pre-tensioning force to the belt in a direction of rotation of the belt in front of and behind the generator pulley;
- a spring clamped between the first and second tension arms to generate the pre-tensioning force;
- and a locking sleeve connected to the first tension arm and fastened to a sleeve section of the first tension arm by a press-fit-interlocking connection, the press-fit-interlocking connection including a cylindrical press joint and an axial stop, the axial stop being formed by the sleeve section of the first tension arm extending radially outward into the locking sleeve and contacting a circumferential edge of the locking sleeve,
- wherein the first tension arm is slidably supported radially against an inner lateral surface of the bearing flange by the locking sleeve, and the second tension arm is slidably supported radially against an outer lateral surface of the bearing flange.
A method of constructing an accessory belt drive comprising a generator having a generator pulley wrapped by a belt, the method comprising:
- pivotably mounting a first tension arm and a second tension arm on a bearing flange configured for enclosing an axis of rotation of the generator pulley;
- and
- press-fitting a locking sleeve to a sleeve section of the first tension to form a cylindrical press joint and an axial stop forming an interlocking connection between the locking sleeve and the sleeve section, the an axial stop being formed by the locking sleeve engaging the sleeve section to prevent displacement of the locking sleeve relative to the sleeve section, the interlocking connection being formed by a circumferential edge formed in the locking sleeve and located at an end of the cylindrical press joint, the axial stop being formed by the sleeve section of the first tension arm being pressed radially outward into the locking sleeve and into contact with the circumferential edge of the locking sleeve.
Dependencies are inferred from the claim text.