发明名称 |
VARIABLE TORQUE-RATE TEST JOINT |
摘要 |
A variable torque-rate test point for the performance testing of rotary tools for threaded fasteners comprises a screw-threaded bolt (1) having a moment of inertia comparable to that of a bolt to be tightened using the rotary tool. The bolt (1) is tightened in the test joint against a torque-rate adjustment device (6) which can be adjusted to simulate a hard or a soft joint. The adjustment device (6) comprises a washer portion (7) beneath the bolt head (4), at least one spring beam (8) extending from a reaction point (9) radially outwardly of the bolt (1), and a pivotal bearing member (10) or other pivot at a mid portion of the beam (8). The beam (8) flexes as it extends in cantilever over the pivot point, and that flexure can be adjusted to vary the torque-rate of the test joint by varying the distance between the pivot point and the rotary axis of the bolt (1). |
申请公布号 |
EP2391876(A2) |
申请公布日期 |
2011.12.07 |
申请号 |
EP20080736942 |
申请日期 |
2008.04.11 |
申请人 |
CRANE ELECTRONICS LTD |
发明人 |
EVERITT, PETER, WILLIAM;TYERS, BEN, WILLIAM;CHAPMAN, ANDREW;BURTON, JOHN, EDWARD |
分类号 |
G01L5/00;G01L5/24;G01L25/00 |
主分类号 |
G01L5/00 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|