temperature indicator for a shaft filled with grease synthetic semi - fluid.

摘要

An assembly including a second component (42, fig.1) rotatably mounted on a first component (32, fig.1) by means of a bearing or bearings (48, fig.1) may comprise a temperature indicator (20, fig.1) which provides a visual signal of the temperature of the bearing. The temperature indicator may be associated with a chamber (46, fig.1) between the first and second component which hold semi-fluid synthetic grease for lubricating the bearings (48, fig.1). Preferably the temperature indicator comprises a pin 82 and a biasing means such as a spring 84, the pin 82 and spring 84 being held in a retracted position by a portion of solder 86. When the temperature increases the solder 86 melts and allows the pin 82 to protrude from the device, preferably through the wall of one of the components (42, 32, fig.1), to provide a visual indication. The temperature indicator may be formed as part of a removable fastening means such as a bolt. Preferably the first and second components are the axle and wheel of a vehicle.