BRAKE DEVICE WITH AN ELASTIC PROTECTION DEVICE AND METHOD FOR MOUNTING A PROTECTION DEVICE
A brake unit for a motor vehicle brake system, comprises at least one brake unit housing and at least one elastic protective device fastened to the brake unit housing, which is arranged as a barrier against dirt, in particular against dust, wherein the protective device has at least one axially compressible bellows portion with a plurality of outer folds and inner folds connected by flanks and alternately arranged in the axial direction. In order to realize an automatable assembly, it is proposed that the protective device has at least one integrated support means for the defined reduction of an axial compression dimension of the bellows region. In a further aspect, a method for mounting the protective device on the brake unit housing is described.
1 . A brake unit for a motor vehicle brake system, comprising:
at least one brake unit housing;
at least one protective device fastened to the brake unit housing,
which is elastic and arranged as a barrier against dirt;
at least one axially compressible bellows portion of the at least one protective device with a plurality of outer folds and inner folds connected by flanks and alternately arranged in the axial direction; and
at least one integrated support of the at least one protective device for the defined reduction of an axial compression dimension of the bellows region.
2 . The brake unit as claimed in claim 1 , wherein the support comprises at least one axial projection arranged on the flank.
3 . The brake unit as claimed in claim 2 , wherein the support comprises at least two axial projections which are positioned so as to lie opposite one another and are arranged on respective sides of adjacent flanks and directed toward one another.
4 . The brake unit as claimed in claim 2 , wherein a plurality of axial projections which are positioned spaced apart from one another in the circumferential direction are arranged on the flank/
5 . The brake unit as claimed in claim 2 , wherein the at least one axial projection is formed as a bead which runs in the circumferential direction.
6 . The brake unit as claimed in claim 1 , wherein the support is arranged on an inner side of the bellows portion.
7 . The brake unit as claimed in claim 1 , wherein the protective device has a fastening portion on an end facing the brake unit housing, wherein the fastening portion is configured for arranging on a corresponding fastening stub of the brake unit housing with the formation of an axial undercut.
8 . The brake unit as claimed in claim 7 , wherein the undercut is formed by at least one radial projection which engages into a circumferential radial depression.
9 . The brake unit as claimed in claim 7 , wherein the fastening portion widens in a funnel-shaped manner in the direction of the brake unit housing for forming a run-up slope.
10 . The brake unit as claimed in claim 7 , wherein the fastening portion has a plurality of reinforcing ribs on a radial outer circumference and arranged spaced apart from one another in the circumferential direction.
11 . The brake unit as claimed in claim 7 , further comprising an axially oriented helical spring arranged radially within the protective device and the axial length of the fastening portion is of greater configuration than a maximum winding spacing of the helical spring.
12 . The brake unit as claimed in claim 1 , further comprising:
a separate supporting disk arranged at an end of the at least one protective device opposite the brake unit housing:
an actuating member on the supporting disk for actuating the brake unit supported axially in the direction of the brake unit housing; and
a helical spring clamped between the brake unit housing and the supporting disk.
13 . The brake unit as claimed in claim 1 , wherein at least one of outer folds and inner folds are formed as round folds with a constant or variable radius.
14 . A method for mounting a protective device on a brake unit housing comprising:
attaching the protective device to a corresponding interface of the brake unit housing, and,
applying a defined axially directed assembly force applied to the end of the protective device opposite to the brake unit housing, and by this moving the protective device by a defined length in the direction of the brake unit housing to assemble the protective device.
15 . The method as claimed in claim 14 , further comprising introducing the assembly force into the protective device from an actuating member of the brake unit.
16 . The method as claimed in claim 14 , further comprising introducing the assembly force from a separate assembly tool.
17 . The method as claimed in claim 16 , wherein the assembly force into the protective device from the assembly tool is introduced into a supporting disk of a brake unit.
18 . The method as claimed in claim 17 , further comprising engaging the assembly tool into an opening of the supporting disk, which is configured for penetration with an actuating member during operation of the brake unit.