Distributor device intended to control the advance and the recoil of the machines self - drills tires a percussion

摘要

P the distribution device is constructed so as to be able to be operated by a simple rotation of the pipe of compressed air 7 feeding the machine, in contrast to the prior art, which is required for both rotation and translation of this pipe, the translational movement may be difficult to obtain because of a lack of rigidity of the tubing. / p & & p & according to the invention, the piston head 4 is blocked in rotation (groove 4a and the tab 1a) in the body 1. The distributor casing 6 can rotate between two limit positions in the bearing ring 5 in order to make with the lights 4b of the piston, or two marking before, the first is formed by the front edge of the sleeve 6, or two marking offset towards the rear formed with the bottom of a notch front of the sleeve 6 and the other by the rear edge of the head 6a of the sheath. The marking prior to control the impact of the piston 4 on the tip of the anvil 3, in order to cause the advance of the machine, whereas the back of which control the marking the percussion piston 4 against the bearing ring 5, in order to move the machine in the borehole. / p