SU43787A1 - Device for automatically turning on and off the feed in the drilling machine - Google Patents

Description

The present invention aims to provide a reliable mechanism for automatic on and off feeds in drilling machines. In the proposed mechanism for activating the rails used to feed the spindles, studs are coupled to the roller coupled to this axle, which receive axial movement in order to engage or turn off the ratchet pawls connected to the automatic feed worm.

In FIG. 1 and 2 are vertical sections of the device proposed, namely FIG. 1 is a XYZU section and FIG. 2 is a PRST cut of FIG. 3, and FIG. 3-horizontal section ABCDEFKLM of FIG. one.

The device consists of a housing 1, a worm gear 2 and a ratchet 3, which is connected to the worm gear with screws. The worm gear 2 is set in motion from the worm 4 and sits loosely on the shaft 5. On the same shaft, a dog coder 24 is mounted on a key, on which the dogs 6 are fastened. The dogs 6 tend to shrink under the influence of the springs 7.

Inside roller 5 is roller 8,

(231)

having cam surfaces visible in FIG. 1. In the grooves of this va.tika through the dog holder 24 vto d two studs 9.

Thus, the studs 9 are in contact with the roller 8 at one end, and with the pawls 6 at the other end. At the end of the roller 8 there is a gear 10, which is connected to it (the roller) with the help of a stud 12. The gear 10 engages a rail 11, on which there are 13 ll auto power off clamp and hout 14 for auto power on. Clamps these can. installed on the rail at any place and then screwed the screws 15 and 16. The roller 8 is connected to the coupling 17 by polishing pins 18, which passes through a special notch in the roller 5. This cut is of such size that it makes it possible to turn the roller 8 without rotating the roller 6 on some angle, after which both rollers rotate together.

The shaft 5 is connected by gear teeth with a rail 19, which in turn is connected with screws with sleeve 20. Sleeve 20 is connected with the drilling spindle of the machine 21 with nuts 22. Thus

as the roller 5 rotates, the rake with the sleeve moves, and hence the machine spindle. A counterweight is attached to the machine through the chain of Gaul and blocks (not shown in the drawing), which serves to lift the spindle upwards after turning on the feed.

When the handle 23 is rotated, the coupling 17 rotates, and therefore the roller 8 rotates through the pin 18 as well. The cam surfaces of this roller rotate so that they move out from under the studs 9 and the studs under the influence of the dogs 6 are compressed Tc all the time under the action of the springs 7, rushes, yhs unclench. Due to the fact that the dogs had shrunk, they connected to the ratchet 3 and consequently turned on the automatic feeding of the machine spindle, since the ratchet connected to the worm wheel 2 rotates with it (the wheel) all the time and when the dogs start, they start to push them, t. e. pushes the dog holder. Since the dog holder is connected with the roller 5 by a key, it will be vrach, ats and a roller, i.e. the rail will move, and hence the spindle, i.e., automatic feed of the drill will be obtained. Together with the roller 5, the roller 8 also rotates. This means that the rail 11 will also move up until the clamp 13 stops against the body. As soon as the thrust collar became, the steel also became the rail 11, which means that the roller 8 also became, but the shaft 5 continues to rotate, as the dogs are connected to the snoring. Since they still rotate, the dog holder also rotates, and therefore the studs start to find on the cam surfaces of the roller 8 and thus start squeezing the dogs until they are completely turned off and disconnected from the ratchet, which is the automatic feed disengagement. Under the influence of the counterweight, the spindle automatically rises to the top, and with it the rake 11, up to the moment when the stop 14 rests on the body. As soon as the rail became, the roller B also ceases to rotate, but the spindle continues to move upward under the influence of the counterweight. Thus, the spindle still has some progress to move upward, it turns the roller 5, and with it the studs that slide off from the surface, i.e., make it possible to release the spring of the dogs and thus turn them on (dogs) with a ratchet, thanks to and it turns on auto power on. So the cycle repeats all the time. If they want to get only semi-automatic operation of the mechanism, i.e., only automatic shutdown, but not automatic switching on, then it is enough to rearrange the stop clamp below part 25. Then, during the reverse of the spindle, sleeve 20 will reach the body of the mechanism and become.

The present invention has been implemented at the plant of drilling machines named. Lenin in Odessa.

The subject matter of the invention.

A device for automatically turning on and off the feed in a drilling machine, characterized in that, to actuate the rail 11 serving to feed the spindle, studs 5 coupled to it 5 are used, axially moved by the cam surfaces of the roller 8 to introduce in coupling or disengaging the pawls 6 of the ratchet 3 connected to the worm wheel 2 of the automatic feed.

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