Clutch mechanism, steering system, and automobile

A clutch mechanism, comprising:

• a slidable block disposed in a radial spacing between a first end shaft and a second end shaft that are coaxially arranged, radially spaced apart from each other, and configured to translate along an axial direction of the first end shaft and the second end shaft to realize decoupling or coupling between the first end shaft and the second end shaft;
• and
• a driving component, configured to drive the slidable block to translate along the axial direction of the first end shaft and the second end shaft;
• wherein one of the first end shaft and the second end shaft comprises a hollow structure;
• wherein a part of the other of the first end shaft and the second end shaft extends in the axial direction into the hollow structure;
• wherein an outer circumferential surface of the part being radially spaced apart from an inner circumferential surface of the hollow structure to accommodate the slidable block;
• wherein the part has a first axial section and a section axial section;
• wherein a radial spacing between an outer circumferential surface of the first axial section and the inner circumferential surface of the hollow structure is less than a radial spacing between an outer circumferential surface of the second axial section and the inner circumferential surface of the hollow structure;
• and
• wherein at a coupling position, an outer sidewall of the slidable block is engaged with the inner circumferential surface of the hollow structure and an inner sidewall of the slidable block is engaged with the outer circumferential surface of the first axial section.