JP2002013546A5 - - Google Patents

Description

The volume relief means is thick portion Ri name than the grooves in the circumferential direction of the single-thread or plural rows provided on the outer peripheral surface of the extra volume when tightening the is released to the space of the groove Thus, The clamping force is equalized over the entire circumference. More specifically, it is preferable that the groove is formed to have a larger groove width as the thickness is larger, or alternatively, the groove is preferably formed in a substantially W-shaped cross section having a convex stripe inside the groove. .

Claims (8)

A boot used in a constant velocity joint including a triport on one of an input side and an output side and an outer case on the other, the large-diameter side attachment portion at one axial end side attached to the outer case outer periphery, and the triport side It consists of a small diameter side attachment part attached to the shaft and a bellows part between the two attachment parts, these parts are integrally formed of resin material, and the inner circumference of the large diameter side attachment part corresponds to the outer case outer circumference A resin boot for a constant velocity joint, which has a non-circular shape and is formed with a thick portion having a convex shape inward ,
A volume relief means comprising one or more grooves in the circumferential direction is provided on the thick-walled outer peripheral surface of the large-diameter side mounting portion, and the large-diameter side mounting portion is substantially even over the entire outer periphery of the outer case. A resin boot for a constant velocity joint characterized in that it is formed so as to be able to be clamped and fixed. The resin boot for a constant velocity joint according to claim 1, wherein the groove is formed such that the groove width is larger as the thickness of the thick portion is larger. The resin boot for a constant velocity joint according to claim 1, wherein the groove is formed in a substantially W-shaped cross section having a convex stripe inside the groove.   The constant-velocity joint resin boot according to any one of claims 1 to 3, wherein one or more sealing protrusions are provided on the inner periphery of the large-diameter side attachment portion.   The said resin material consists of thermoplastic elastomer resin, The resin-made boots for constant velocity joints of any one of Claims 1-4.   The resin-made boots for constant velocity joints according to claim 5, wherein the thermoplastic elastomer resin is one in which a mineral oil or a vegetable oil is blended.   The resin-made boot for constant velocity joints according to claim 5, wherein the thermoplastic elastomer resin is one containing a fatty acid amide.   The resin-made boot for constant velocity joints according to claim 5, wherein the thermoplastic elastomer resin is one containing a polyether.