Fastening system and hydraulic device having the same fastening system

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.

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.