Fastening system and hydraulic device having the same fastening system
A fastening system for fastening an annular body, in particular a covering cap, end shield, or the like. The fasting system includes an annularly extending side wall having an outer side and an inner side and comprising a collar which projects radially from the outer side, to an element, in particular a housing, hydraulic block or the like, which includes a receiving region for the collar. For fastening the annular body to the element, the element is or will be plastically deformed in such a way that the material of the element is or will be displaced to engage behind the collar. The element includes an annular recess having a caulkable lateral outer wall and having a retaining contour which is radially spaced apart from the lateral outer wall. The retaining contour is configured to interact in a form-fitting manner with the collar.
1 . A fastening system for fastening an annular body, the fastening system comprising:
the annular body including an annularly extending side wall having an outer side and an inner side; and
a collar which projects radially from the outer side to an element which includes a receiving region for the collar;
wherein, for fastening the annular body to the element, the element is plastically deformable in such a way that a material of the element is displaceable to engage behind the collar, the element includes an annular recess having a caulkable lateral outer wall and having a retaining contour which is radially spaced apart from the lateral outer wall, and the retaining contour is configured to interact in a form-fitting manner with the collar at least in a direction facing away from the lateral outer wall.
2 . The fastening system according to claim 1 , wherein the annular body is a covering cap or an end shield.
3 . The fastening system according to claim 1 , wherein the element is a housing or a hydraulic block.
4 . The fastening system according to claim 1 , wherein the side wall and the recess are configured such that they extend in a circular ring-shaped manner.
5 . The fastening system according to claim 1 , wherein the collar ends radially spaced apart from the lateral outer wall of the recess.
6 . The fastening system according to claim 1 , wherein the collar forms an interference fit with the lateral outer wall of the recess.
7 . The fastening system according to claim 6 , wherein the recess includes an annular projection which projects radially from the lateral outer wall into the recess to form the interference fit.
8 . The fastening system according to claim 1 , wherein the retaining contour is configured as a lateral inner wall of the recess opposite to the lateral outer wall.
9 . The fastening system according to claim 8 , wherein the lateral inner wall is configured such that it extends at least substantially parallel to the lateral outer wall.
10 . The fastening system according to claim 8 , wherein the lateral inner wall is configured to form an interference fit with the inner side of the side wall of the annular body.
11 . The fastening system according to claim 8 , wherein the retaining contour is formed by an inclined base of the recess.
12 . The fastening system according to claim 1 , wherein the lateral inner wall includes an undercut.
13 . The fastening system according to claim 1 , wherein the collar includes a projection which projects radially outward for forming a press fit with the lateral inner wall of the recess and, axially spaced apart from the projection, a sealing section which is configured to interact in a sealing manner with caulked material of the element.
14 . The fastening system according to claim 1 , wherein the element or the annular body includes at least one elastically deformable sealing element which interacts in a sealing manner with the annular body or the element.
15 . A fastening system for fastening an annular body, the fastening system comprising:
the annular body including an annularly extending side wall having an outer side and an inner side; and
a collar which projects radially from the outer side to an element which includes a receiving region for the collar;
wherein, for fastening the annular body to the element, the element is plastically deformable in such a way that a material of the element is displaceable to engage behind the collar, the element includes an annular recess having a caulkable lateral outer wall and having a retaining contour which is radially spaced apart from the lateral outer wall, and the retaining contour is configured to interact in a form-fitting manner with the collar at least in a direction facing away from the lateral outer wall,
wherein the retaining contour is configured as a lateral inner wall of the recess opposite to the lateral outer wall,
wherein the retaining contour is formed by an annular groove formed in a base of the recess which is inclined perpendicular to the lateral outer wall, wherein the collar and/or the side wall include an annular projection on the end face of the collar or side wall, respectively, that can be inserted into the annular groove.
16 . A hydraulic device for a motor vehicle, comprising:
an element which is configured as a hydraulic block and includes at least one opening for forming a chamber; and
at least one annular body which is configured as a covering cap and/or as an end shield, and which closes the chamber;
wherein the annular body is fastened to the element using a fastening system including:
an annularly extending side wall of the annular body, the side wall having an outer side and an inner side; and
a collar which projects radially from the outer side to the element which includes a receiving region for the collar;
wherein, for fastening the annular body to the element, the element is plastically deformable in such a way that a material of the element is displaceable to engage behind the collar, the element includes an annular recess having a caulkable lateral outer wall and having a retaining contour which is radially spaced apart from the lateral outer wall, and the retaining contour is configured to interact in a form-fitting manner with the collar at least in a direction facing away from the lateral outer wall.
17 . The hydraulic device according to claim 16 , wherein the hydraulic device is a braking device for a motor vehicle or a brake booster.