2results about How to "Avoid mechanical contact" patented technology

The utility model belongs to shaft hole detection technical field relates to a kind of shaft hole smoothness detection device, including casing, shaft, upper end cover, lower end cover, shaft plug cover, compensating piston, scale bar and tracheal joint and other components;Casing both ends are provided with end cap, center passes through the shaft to be measured, the one end of shaft passes out end cap and is provided shaft plug cover, and tracheal joint is communicated to the shaft hole on the shaft plug cover;Compensating piston is slidably arranged in the shaft hole, one end of compensating piston is connected with scale bar, and scale bar passes out shaft and is slidably arranged in shaft plug cover;Casing outer wall is provided with tracheal quick plug, and tracheal quick plug is communicated to casing inner cavity.The utility model realizes the quick, accurate evaluation to the surface quality of shaft hole by using non-contact pneumatic detection principle.

This invention belongs to the field of micro-weld joint strength testing technology and discloses an elastomer for push-pull testing equipment. The elastomer includes a base with a guide rail on its surface; a slider slidably mounted on the base via the guide rail; and a vent plate with an air inlet channel and several air outlets. The air inlet channel connects the air outlets to an external air supply device. An elastic element is positioned between the base and the vent plate, facing the slider. The elastic element applies a spring force to the vent plate, ensuring tight contact between the vent plate and the slider, thus fixing the slider. When the external air supply device is activated, high-pressure gas is ejected from the air outlets through the air inlet channel. The gas drives the vent plate to retract, compressing the elastic element and forming an air film between the vent plate and the slider, allowing the slider to slide freely along the guide rail. This design avoids mechanical contact between the pusher assembly and the workpiece, providing buffering and protection, reducing damage to the pusher assembly, and improving its service life.