| 摘要 |
<p>A proximity sensor has a metal case (10) with a sensing coil (11) at one end and a coaxial cable (12) extending out the other end for placement in proximity to rotating machinery to sense imbalances by position change of, for example, a shaft. The sensor includes a cylinder (21) integrally molded with a plastic bobbin (22) which carries the coil (11) on its end. This unitary assembly then has inserted in it the coaxial cable (12) and the typically wire braided outer conductor (17) is soldered onto the cylinder (21) to provide a permanent interlock resistance against axial and torsional forces. A plastic insulating cap (41) is placed over the entire assembly including the sensing coil (11) and epoxied thereto. A sleeve (43) over the junction between the cable and cylinder prevents unwanted epoxy from filling the coaxial cable (12). Finally, this permanent affixing of the cap (41) allows the metal casing (10) normally having a nut and thread to be crimped onto a notch in the cap. Moisture proofing is also provided by injection of silicone rubber in the cavity of the bobbin.</p> |
