SU795740A1 - Self-centring lathe chuck - Google Patents

Description

(54) SELF-CENTERING FIST LATCH CARTRIDGE

I

The invention relates to a machine tool industry and can be used for securing parts during turning.

A device of a similar purpose is known, comprising a housing in which a helical-rack mechanism of installation movement of cams with slats connected with sliders and a mechanism of working movement of cams with centrally located driving rod 1 are placed.

A disadvantage of the known devices is structural complexity.

The purpose of the invention is to simplify the design.

The goal is achieved by the fact that the slats of the spiral-rack mechanism are equipped with hinges and clamping levers that interact with sliders and are installed with the possibility of rotation on the hinges, and the working movement cam pins of the cam movement are equipped with a crosspiece with two rows of radial grooves, which include clamping levers and reiki.

FIG. 1 shows the cartridge, axial section; in fig. 2 shows section A-A in FIG. one; in fig. 3 is a view B in FIG. one.

The self-centering cam lathe chuck contains a flange 1, a housing 2, between the flange and the housing there is an insert 3 with T-slots 4. Between the flange 1 and the insert 3 there is a disk 5 with

Claims (1)

spiral-cut bis-toothed, cut to outer diameter 7. The disk meshes with the bristles 8 and with the laths 9. On the side surfaces of the laths there are grooves 10 which are included in the T-shaped grooves of the insert 3. On the laths 9 equipped with joints 11, the levers 12 are fixed, the protrusions 13 enter the guides 14 into the guide grooves 14, and the protrusions 16 into the slots of the sliders 17. The crosspiece 15 is rigidly connected to the stem 18. To allow the cross to move axially between the insert 3, the crosspiece and the inner surface 19 The case has a gap. The centering of the crosspiece with respect to the axis of the chuck is performed by the sleeve 20 inserted into the machine spindle. The chuck operates from any force mechanism mounted on the opposite side of the spindle and is connected with it by a pull 21 connected to a shaft 18 passing inside the spindle of the machine. The cartridge is rearranged to the desired size by rotating the gear 8, which is engaged with the spiral disk 5, which, when rotated, causes the radial movement of the rails 9. At the same time, the levers 12, hinged on the rails, moving along the cross guides, move the sliders in the radial direction. The working movement of the sliders 17 is carried out by the axial movement of the rod 21, connected with the crosspiece 15, to the right or left. The levers 12 are deployed relative to the hinges 11, moving the sliders in the radial direction to fasten or detach. Claims A self-centering cam lathe chuck comprising a housing in which a helical-rack mechanism of cam mounting movements with slats associated with sliders and a cam cam movement mechanism with centrally located driving shaft, characterized in that, in order to simplify the design, the slats are housed -railing mechanism are equipped with hinges and clamping levers that interact with sliders and are installed with the possibility of rotation on the hinges, and the rod of the working gear mechanism escheni cams provided with a crosspiece with two rows of radial slots in which are received respectively the clamping levers and the rail. Sources of information taken into account during the examination 1. USSR Author's Certificate No. 424669, cl. B 23 B 31/30, 1971. / (rig 2