| 摘要 |
A friction pivot joint where a headed fastening couples two components by passing through aligned openings in the components and having structure for preventing axial movement of the tail of the fastening. The joint is characterized by the shank of the fastening extending through a bushing of wear resistant plastics material located in the opening in one component. The bushing has integrally formed therewith a peripheral flange and the flange is sandwiched between the two components thereby preventing contact between the components. Friction in the joint is created from the plastics bushing and integral peripheral flange being placed under pressure by the fastening. The bushing has a length which is greater than the length of the opening in which it is located with the result that during assembly of the joint pressure created by the fastening causes the free end of the bushing to flow under the head of the fastening to be retained thereunder by retaining structure. The head and shank of the fastening are thus prevented from contacting that one component so that during relative pivotal movement of the component substantially no torque is applied to the shank by the head of the fastening. |
