A housing has, on an outer circumferential surface thereof, a circumferential surface area, a toothed surface area complementary in shape to grooves and teeth of a boot of rubber, and a stopper engagable by tip ends of the boot of rubber and a boot of synthetic resin. The circumferential surface area, the toothed surface area, and the stopper are successively arranged in the order named in the direction in which the boots are installed onto a rotary joint. The housing has an outside diameter at the circumferential surface area which is equal to or greater than an inside diameter of the boot of synthetic resin. The circumferential surface area, circumferential teeth of the toothed surface area, and the stopper are progressively higher radially outwardly in the order named.
A boot fitting structure is fitted onto an axial component to protect it from a dirty environment including outside dust. The boot has a pair of annular grooves and an annular lip between the pair of annular grooves on an inner surface of the boot. The annular lip does not project from an inner surface toward a centerline of the boot. An annular protuberance is provided between the boot and a clamp, through which clamping force from the clamp is concentrated on the annular lip, so that the annular lip is elastically deformed and pushed toward outside of the axial component. Therefore, the axial component can be inserted into the boot without interference between the annular lip and the axial component. Furthermore, the annular lip is free from damage by interference between the annular lip and the axial component.
A power transmission shaft includes a swaged boot-engaging groove on an outer circumference of thereof. Further, the power transmission shaft includes a reduced diameter portion provided in the vicinity of the boot-engaging groove. The reduced diameter portion is formed by swaging at the same time as the boot-engaging groove is formed.
The boot fixing portion 2a is fitted on the outer peripheral surface 1a3 of the boot attaching portion 1a2, the positioning of the two being made such that the convex portion 2a2 is fitted in the engaging groove 1a4. Then the boot band 3 fitted in the band mounting groove 2a3 is reduced in diameter by folding back the lever member 3b, thereby clamping the boot fixing portion 2a to the boot attaching portion 1a2. Thereupon, the clamping force exerted by the boot band 3 causes elastic deformation of the boot fixing portion 2a, displacing the convex portion 2a2 toward the engaging groove 1a4, so that the projections 1a5 bite into the inner peripheral surface 2a1 of the boot fixing portion 2a.
A sealing bellows is provided having a jacket (1b) arranged between first and second edges (1a, 1c) of the sealing bellows. The edges (1a, 1c) of the sealing bellows are sealingly in contact with components in the assembled state of the sealing bellows (1). At least a first edge (1a) of the sealing bellows has radially inwardly pointing teeth (3a), which engage a contour of a component or a housing (2) of a ball and socket joint to form a snap connection.
A boot for a joint is provided having an aperture and at least one protrusion and at least one indentation disposed about an inside diameter of the aperture.
