SU1329920A1 - Self-centering chuck - Google Patents

Abstract

The invention relates to the field of machine tools, in particular, to devices for securing parts to the spindle of turning machines with P1TU. The aim of the invention is to reduce changeover time. In housing 1, cams 2 are mounted, which are connected to the spiral disk 3 mounted on the rod 6 by means of a spiral-splined connection. On the rod 6 are straight splines 17, forming a spline element that interacts with the sleeve 7, the spring-loaded spring 18 and the inner splines are sweeping. When re-adjusting the cams 2 to a different size, the spline element of the outgoing-1 is engaged with the sleeve 7, as a result, the cams 2 are moved through one of the gears 5. 1 sludge. i (L

Description

ten

25

The invention relates to machine tool construction, in particular, to devices for securing parts on a spindle of CNC lathes.

The aim of the invention is to reduce changeover time.

The drawing shows a cartridge, axial incision.

The cartridge includes a housing 1 in which the cams 2 with a spiral disk 3 fitted with a bevel gear 4, coaxially with bevel gears 5, a rod 6 connected with a movable spline connection with an axially spring-loaded sleeve 7 and a spiral-splined movable connection with spiral disk 3.

The spiral-rack mechanism consists of a rail 8, on which the cams 2 are fixed, and a spiral disk 3. The rail 8 is mounted in radial guides 9 located in the lid 10 fixed to the housing 1. On the axis 11 of the crown 11 on the bearings 12 is mounted the disk 3, on which the sleeve 13 is fixed, on the inner surface of which screw slots are made. The counter splines are made at the end 14 of the rod 6. The spiral disk 3 in the axial direction of the bearing: cs on the housing 1 through the bearings 15. The sleeve 7 has a longitudinal groove in which the pin 16 or key is mounted in the housing. The splines are made on the inner surface of the sleeve 7, the slots are made, and the counter slots 17 are on the rod 6. Sockets for installing the spring 18 are made in the sleeve 7.

The cartridge works as follows.

When the rod 6 moves to the right under the action of a drive (not shown), the spiral disk 3 rotates on the axis 11J the cams 2 move radially to clamp the part (not shown). If the part is missing, HITOK 6 moves to the right to the limit provided by the actuator moving the rod 6, and the splines 17 exit from

The engagement with the splines screw the splines, located at the end 14 of the stem 6, remain with the response with 1 spline 13. In this position, adjust the position of the cool manually by rotating one and 5. To insert the splines 17 with the spline, the bushings 7 move to the left. At the same time, due to the spiral-rack mechanism of friction forces on the contacting legs,

15 of the rod 6, and the resistance of the rod 6 is less lazy to the rotation of the spiral mechanism, the rod 6 rotates in the screw slots in

2Q If the splines 17 do not fall into the hollows in the sleeve 7, then move the knuckle together.

6 until the splines are engaged. After this

7 by the action of the spring 1

is set to original

With further movement, the carriage 2 moves in 30 presses each.

Claims (1)

Formula images The self-centering chambered grooves of the housing of which are clamping cams with a disk connected to the clamping rod by means of a spiral connection, wherein a splined element is attached, in which the reduction of time to the cartridge is provided with a perforated sleeve inside the housing with in conjunction with the aforementioned spline echanical with the possibility of withdrawing it from the 40 45 Editor N.Shvydka - with splined hub. Compiled by T. Kravchenko Tehred L. Serdyukova Proofreader M. Pojo Order 3521/15 Circulation 974 Subscription VNRSHPI State Committee of the USSR for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5 Production and printing company, city. Uzhgorod, st. Design, 4. . the engagement with the splines of the sleeve 7, and the screw splines located at the end 14 of the rod 6 remain in engagement with the response with 1 splines on the sleeve 13. In this position, the position of the cams 2 is adjusted manually by rotating one of the gears 5. To insert the splines 17 into engagement with slotted sleeve 7 stem first- schuyut left. At the same time, due to the fact that the spiral-rack mechanism, due to frictional forces on the contacting surfaces, resists rotation from the rod 6, and the resistance to rotation of the rod 6 is made less than the resistance to the rotation of the spiral-riveted mechanism, the rod 6 rotates, moving in the screw splines of the sleeve 13. If the splines 17 do not fall into the mating depressions in the sleeve 7, then the sleeve begins to move with the rod 6 until the splines 17 are engaged. After that the sleeve 7 under the action of the spring 18 return- g shifts to its original position. Upon further movement of the rod, the cams 2 move to the extended position. Formula invented and A self-centering cartridge, in the radial grooves of the housing of which there are clamping cams with a helical disk connected to the clamping drive stem by means of a spiral-splined connection, wherein the spline element is located on the rod, characterized in that, in order to shorten the time for changeover, the cartridge equipped with a spring-loaded bushing coaxially arranged in the housing with internal splines designed to cooperate with said spline element installed with the possibility of periodically withdrawing e of disengaged