| 摘要 |
<p>A mechanical automatic length adjuster comprises a screw (16) of generally buttress thread form running within an internally threaded housing (12) on running flanks under the action of a coil compression spring (28) within the housing. The housing is provided with a through bore having an unthreaded bore portion (18) at one end within which is retained a cup member (22) providing a reaction surface for the spring; the cup member being retained by a circlip (26) at the end of the unthreaded bore portion. A bearing member (32) is provided between the other end of the spring and the inner end of the screw which extends into the housing and includes a guide portion (34) extending into the spring convolutions and a captive ball bearing (36) providing low friction engagement with the inner end of the screw.</p> |
