SU21414A1 - A device for simultaneously drilling three holes in the sleepers for crutches - Google Patents

Description

In the proposed device for simultaneous drilling} 1 in the sleepers of the three holes for the crutches, a frame is used consisting of two parts that are adjustable relative to each other, carrying one two heads for clamping the drills rotated from the drive, and the second is one such head for preserving the transmission of rotation in the latter head when changing the longitudinal distance between the drilled holes, the gear wheel of the said transmission is made movable over the axis and is loaded with a spring.

FIG. 1 shows a vertical section of the device; FIG. 2 is a top view, partly in section; FIG. 3- view of the device from the side, partially in section. The frame of the proposed device consists of two parts 12 and 13 (Fig. 1). Part 12 is provided with 14, through which part 13 is moved using a screw 9 with right and left cuts, equipped with a handwheel 10. Part 12 also carries / Permanent head 7 for clamping drills connected by means of gear HELP with gear 11, mounted on the shaft 17, receiving rotation from the handle 2 through a bevel gear 3. The shaft 16 is connected simultaneously to a conical

transfer 4 with the axis b, on which-. The gear wheel 5 is fixed axially in motion. Wheel 5 engages a gear mounted on the axis of the head 7 for the third drill, the frame fixed in part 13, and the hub of this wheel is affected by the spring 15.

Before the device starts working, the distance 8 between the axes of the heads 7 for drills is established by rearranging part of the frame 13 relative to part 12 according to the type of rail, jtoTOpye; the crutches should be strengthened. At the same time, all three drivers are located above the places for the holes and, simultaneously, are turned by the handle 2 in rotation, at which holes are drilled out of the corresponding Depth.

The subject matter of the invention.

A device for simultaneous drilling of the Ties of three sleepers for crutches, characterized by the use of a frame consisting of two parts 12 and 13, a double part 12 kece T two constant for; clamping drill bits of the head 7, which receive rotation through gears from the handle 2, and part 13, carrying the tretb head 7, is made adjustable on the direction of the 14 part 12 by means of

screwed by handwheel 10 screws 9 with right and left cuts, in order to change the longitudinal distance between drill holes in some device, to save when specified, see change gear to head 7 of part 13, gear 5 made movable along axis b and its sleeve is under the action of the spring 15.

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