Controllable mechanism type connection rod mechanism

The invention provides a controllable mechanism type connection rod mechanism. The bottom end of a stand column is provided with a rotary pair and the top end of the stand column is connected with one end of a main arm and a first connection end of a first rocker arm; a second connection end of the first rocker arm is connected with one end of a first connection rod; the other end of the first connection rod is connected with a second connection end of a second rocker arm; a first connection end of the second rocker arm is connected with the other end of the main arm; a third connection end of the second rocker arm is connected with one end of a second connection rod and the other end of the second connection rod is connected with a third connection end of the first rocker arm; one end of a third connection rod is connected with a fourth connection end of the second rocker arm; the other end of the third connection rod is connected with a fourth connection rod; one end of a connection block is connected with the stand column by a fixed pair and the other end of the connection block is connected with one end of a fifth connection rod; the other end of the fifth connection rod is connected with one end of a sixth connection rod; the other end of the sixth connection rod is connected with the middle part of the main arm. The controllable mechanism type connection rod mechanism has the advantages of large working space, high rigidity, strong bearing capability and high execution precision.