Five-coordinate locating mechanism

The invention discloses a five-coordinate locating mechanism, which comprises an X-direction guide part, a Y-direction guide part, a Z-direction guide part, an A-direction rotating part and a working platform. The structures of the Y-direction guide part and the Z-direction guide part are the same, and moreover, the Y-direction guide part and the Z-direction guide part are arranged in a cross wayto provide the translational movement of the working platform in the X-direction and the Y-direction; the Z-direction guide part provides the translational movement of the working platform in the Z-direction and the rotation of the working platform in the B-direction through the synchronous or the asynchronous movement of Z-direction moving plates at the two sides of the Z-direction guide plate; and the A-direction rotating part provides the rotation of the working platform in the A-direction. The five-coordinate movement of the working platform is realized through mature and reliable structures like screws, guide rails, gear pairs and the like adopted by the five-coordinate locating mechanism. The five-coordinate locating mechanism has good processing and assembling properties, high locating precision, and large bearing capacity. Moreover, five coordinates control the movement in a relatively independent way, and kinematics analysis and solution are simple, therefore, the control is simpler.