我们通常使用的双向棘轮机构,轮齿为矩形,棘爪为单面式。更换旋转方向时,需要将棘爪旋转180°,操作不便,同时还容易造成棘轮齿面和棘爪的变形及损伤,导致机构失灵。现推荐一种无棘爪式双向棘轮机构(图示)。该机构的棘轮齿截面为梯形。当逆时针旋转时,将杠杆插入左边的调节块的孔Ⅰ内,在扭矩的作用下,调节块首先绕支点(销轴6)逆时针转动,使其内齿与棘齿轮啮合,同时迫使活动销9向内运动并利用柱销9使右边的调节块绕右边支点6顺时针旋转,内齿也与棘轮齿啮合,在扭矩的继续作用下调节块带动棘轮旋转,转到一定角度 We usually use the two-way ratchet mechanism, gear rectangular, pawl for the single-sided. Change the rotation direction, you need to rotate the pawl 180 °, inconvenient to operate, but also easily lead to ratchet tooth surface and pawl deformation and damage, resulting in failure of the mechanism. Now recommend a non-pawl two-way ratchet mechanism (Figure). The ratchet tooth section of the mechanism is trapezoidal. When rotating counterclockwise, insert the lever into the hole I of the left adjustment block. Under the action of torque, the adjustment block first rotates anticlockwise around the fulcrum (pin 6), causing its internal teeth to mesh with the ratchet gear and forcing the activity The pin 9 moves inwardly and utilizes the pin 9 to rotate the right adjustment block clockwise about the fulcrum 6 on the right and the internal teeth also mesh with the ratchet teeth. Under the action of torque, the adjustment block drives the ratchet to rotate to a certain angle