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AssigneeContinental Teves AG & Co. oHG
InventorsNorbert Leidecker, Matthias Würz, Jürgen Balz, Dieter Füller
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The invention relates to a piston for a brake caliper, which can be actuated in combined fashion, of a disk brake, which piston 1 is produced by shaping processes from a metallic material, in particular from a planar metal sheet, and which piston 1 is formed as a pot which is open on one side and which has a longitudinal axis, a wall and a piston crown, and which piston has a twist prevention facility for a drive nut. The invention is based on the problem of providing a robust piston construction which is better capable of tolerating erroneous repair work. To solve the problem, it is proposed that the twist prevention facility has, between the piston and drive nut, at least one reinforcement for protecting against plastic deformation of at least one driver.
A piston (1) for a brake caliper of a disk brake, which piston (1) is produced by forming processes from a metallic material, in particular from a flat metal sheet, and which piston (1) is designed as a pot which is open on one side and which has a longitudinal axis, a wall and a piston head (11), and can be placed against a brake pad by means of an axial contact surface (12), and which piston (1) has at least one twist prevention means between the piston (1) and a drive nut (13), characterized in that the twist prevention means has at least one integrated reinforcement, which serves to protect the piston (1) against plastic deformation by the drive nut (13).
The piston (1) as claimed in one or more of the preceding claims, characterized in that the contour (19) on the piston (1) and the mating contour (20) on the drive nut (13) each form at least two pairs of flats (11, 22′), which are arranged parallel to one another and positioned diametrically opposite one another to form driving features.
The piston (1) as claimed in one or more of the preceding claims, characterized in that the contour (19) on the piston (1) and the mating contour on the drive spindle (13) each form at least two pairs of supporting surfaces (23, 23′), which are arranged parallel to one another and positioned diametrically opposite one another.
The piston (1) as claimed in one or more of the preceding claims, characterized in that the contour (19) on the rim (18) of the piston (1) is designed as an inner contour of asymmetric clover leaf shape.
The piston (1) as claimed in one or more of the preceding claims, characterized in that pairs of supporting surfaces (23, 23′) and pairs of flats (22, 22′) are provided alternately and offset at regular intervals at an angle (β) to one another.
The piston (1) as claimed in one or more of the preceding claims, characterized in that the piston (1) receives at least one insert (16), and wherein the rim (18) overlaps the insert (16) at least partially in a positive manner.
Dependencies are inferred from the claim text.