Anchor rod drill carriage with variable chassis width

The anchor rod drill carriage comprises the chassis, the chassis comprises a main beam, a left track beam, a right track beam, a first lifting supporting part and a second lifting supporting part, the first lifting supporting part and the second lifting supporting part are arranged at the front end and the rear end of the main beam respectively, and a left telescopic mechanism is arranged between the left track beam and the main beam. A right telescopic mechanism is arranged between the right track beam and the main beam; the first lifting supporting part and the second lifting supporting part can lift the main beam in the Z direction so that the main beam can be suspended, and the left telescopic mechanism and the right telescopic mechanism can stretch out and draw back the length of the main beam when the main beam is in the suspended state so as to drive the left crawler beam and the right crawler beam to be close to or away from the main beam in the Y direction. According to the anchor rod drill carriage