Reciprocating Linear/Rotational Motion Conversion Device and Cylinder Device

A reciprocating linear/rotational motion conversion device, comprising a main shaft (1), a linear motion guiding mechanism (2), a sector gear (3) and a rack frame (4) capable of linearly moving along the linear motion guiding mechanism (2);

• the sector gear (3) being fixedly connected with the main shaft (1);
• a gear rack pair being arranged on the inner wall of the rack frame (4);
• and characterized in that the reciprocating linear/rotational motion conversion device further comprises a reversing mechanism (5) fixedly connected with the main shaft (1), a guiding curved surface (51) and a guide member (52) are arranged on the reversing mechanism (5), a reversing block (43) is arranged on the rack frame (4), and when reciprocating linear motion and rotational motion mutually convert, the reversing block (43) would be jointly constrained by the guide member (52) and the guiding curved surface (53).