PORTABLE DIGITAL DISPLAY HARDNESS MEASURING DEVICE

摘要

A portable digital display hardness measuring device comprises a supporting seat (8), a force measuring device, a pressure head (1), an electronic circuit board (26), a digital display (19), and a stress application and indentation depth measuring device. The stress application and indentation depth measuring device comprises a hand wheel (11), a rotary encoder (9), a sleeve (14), and a micrometer screw thread pair formed by a micrometer nut (18) and a micrometer screw rod (17); the rotary encoder (9) is disposed on the supporting seat (8), the micrometer nut (18) is disposed in a hole, the digital displayer (19) is disposed on a front side, and the electronic circuit board (26) is disposed on a side face; the micrometer screw rod (17) is disposed in the micrometer nut (18), a rotating shaft (10) of the rotary encoder (9) is connected to the micrometer screw rod (17) and rotates with the micrometer screw rod (17), an upper end of the micrometer screw rod (17) is connected to the hand wheel (11), a lower end is connected to the force measuring device; and a lower end of the force measuring device is connected to the pressure head (1); and the hand wheel (11), the micrometer screw rod (17), the force measuring device, and the press head (1) are connected to each other and are concentric, and move with rotation of the hand wheel (11) in the axial direction. The portable digital display hardness measuring device has a simple structure, convenient reading, easy operation and high precision, and can be fixed on metal parts through a fixing device to quickly detect hardness of large parts on site.