SU761154A1 - Double-jaw rotary chuck - Google Patents

Description

The invention relates to machine tools and can be used for multilateral processing of parts on machines of various types.

Known swivel chucks with two cams, in the case of which there is a cam moving and fixing device, driven by a pusher, and a mechanism for controlling the clamping and turning drive, made in the form of coaxially mounted drive gears (1).

The disadvantages of the known constructions are relative complexity and time consuming for the changeover of the cartridge.

The purpose of the invention is to simplify the design and reduce the time for changeover.

For this purpose, a lever is installed in the body of the chuck, which connects the internal drive rod of the mechanism for controlling the clamp and pivoting with the pusher of the device for moving and fixing the clamping cam.

FIG. 1 shows the proposed cartridge, end view; in fig. 2 - section A — A

FIG. one; in fig. 3 — section B — B of FIG. 2;

in fig. 4 — section B — B of FIG. 2; on

FIG. 5 - section G - G fig. 2; in fig. 6 -

2

the same, in the case of the interaction of the pin with the external pusher.

The cartridge includes a housing 1 bonded with a tubular bar 2. A transverse trunnion 3 and a clamping cam 4 with interchangeable base prisms 5 and 6 are mounted in transverse coaxial bores of the housing 1. The rotary trunnion 3 is paired to the rotation axis of the body 1 at the head of the rod 2 2 boring with mounted in it movable pushers 7 and 8, mounted coaxially in one another. In the side bores, PA, 15 parallel to the axis of the pusher 7, there are springs 9, which hold the pusher 7 in the position retracted from the trunnion 3. On the end parts of the pushers 7 and 8, bevelled working platforms 10 and 2 o 11 are formed, with which the pushers interact with the faces 12 and 13 of the square sections of the trunnion 3. The edges 12 and 13 are mutually displaced at an angle of 45 °. In the rod 2, passed through the axial hole of the spindle of the machine,, 25 installed coaxial drive thrust 14 and 15 connected to the drive movement in the form of, for example, power cylinders (not shown). Traction 14 is equipped with a transverse lever 16, which is included in the groove of the pusher 8. 30 Traction 15 is connected by turning the two shoulders

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a lever 17 with a pusher 7 and a rotary two-armed lever 18 with a pusher 19 installed in the longitudinal bore of the rod head 2 from the side of the clamping cam 4 and interacting with the beveled grooves in the cam 4 with bevelled projections 20. The pusher 19 is provided on the sides with rods 21 interacting with springs 22 mounted parallel to the axis of the pusher 19 in the side bores. The springs 22 hold the cam 4 through the pusher 19 in the working position. The drive for moving the rods 15 and 14 moves the thrust 14 to two extreme positions, and the thrust 15 — to the two extreme and one middle position.

The cartridge works as follows.

Using the drive movement of the traction 15 is moved along the arrow D and through the elements 18, 19 and 20 take the cam 4 with prism 6 to its original position, while the springs 22 are compressed. After installing the workpiece 23 between the prisms 5 and b, the thrust 15 is moved to the middle position, the cam 4 moves to the working position through the elements 18, 19 and 20 and clamps the workpiece 23 between the prisms 5, 6. Next, to rotate the workpiece 23 to the next the position, the thrust 14 is moved along the arrow E and the lever 16 pulls the pusher 8 away from the trunnion 3. By moving the thrust 15 in the direction of the arrow E, the pusher 7 moves the pusher 7 towards the trunnion 3. The interaction of the platforms 10 of the pusher 7 with edges 12 square 4

plots of trunnion 3, trunnion 3 rotates at an angle of 45 °. After moving the thrust 15 to the middle position, the pusher 7 is moved away from the pin 5 by the action of the springs 9. Next, by moving the thrust 14 in the direction of arrow D, the push rod 8 is moved by means of the lever 16, which, interacting with the edge 11 of the 12 square section of the trunnion 3, turns back Em pin 3 at an angle of 45 ° and rigidly fixes in this position. Subsequent cycles of rotation are carried out in a similar sequence.

Claims (1)

Claim five Two-cam rotary cartridge, in the case of which there is a cam moving and fixing device, driven by a pusher, and> 0 a mechanism for controlling the clamping and turning drive, made in the form of coaxially mounted drive gears, in order to simplify the design and shortening the time for changeover, a lever is installed in the body of the chuck, which connects the internal drive rod of the clamp and turn control mechanism with the pusher of the device for moving and fixing the clamp to ulachka.