Assembly with tolerance absorbing spacer
View Patent ↗A tolerance absorbing spacer for controlling manufacturing dimensional tolerance variation in products made with multiple internal components, each requiring unique dimensional tolerance allowance. This component adjusts and compensates for the resulting overall cumulative component height variation within an assembly of components, sometimes referred to as “stack height” by compensating for the maximum to minimum range of possible assembly heights, compressing and yielding under applied external force until all excess internal clearance is removed, except for a small, and desirable remaining clearance. This component yields and becomes essentially fully plastic, to provide the necessary tolerance adjustment feature only after reaching a predetermined, minimum force which exceeds all applied forces the component could reasonably encounter in service use and below which, the tolerance absorbing spacer remains fully rigid.
1. An automotive socket assembly comprising:
a housing having a concave bearing surface;
an upper bearing;
a ball stud passing through an open end of the housing, said ball stud having a protruding shaft and a convex bearing surface, received in the housing and supported between axially aligned concave bearing surface and said upper bearing;
a wave shaped tolerance absorbing spacer sandwiched between said upper bearing and a closed or closable end of the housing;
an elastic preload washer sandwiched between said upper bearing and said spacer,
said spacer plastically deformed by a force applied substantially in the axial direction leaving a controlled and desirable socket clearance space in the assembly, the spacer having a consistent and minimal amount of elastic rebound within a socket tolerance variation to be compensated after being plastically deformed, once a minimum required force for plastic deformation has been met, said spacer comprising a flat annulus with a plurality of wave forms in the axial direction and extending around the annulus, each of said wave forms having a constant amplitude from an outside diameter to an inside diameter of the annulus, said spacer removing undesirable internal clearance between the components within said socket assembly.
2. The socket assembly of claim 1 wherein the elastic preload washer is a Belleville washer.
3. The socket assembly of claim 1 wherein the plurality of wave forms are evenly spaced.
4. The socket assembly of claim 1 wherein the plurality of wave forms are unevenly spaced.
5. The socket assembly of claim 1 wherein the spacer is plastically deformed prior to a final assembly.
6. The socket assembly of claim 1 wherein the spacer is plastically deformed prior to an initial assembly.