SU588070A1 - Self-centering turning chuck - Google Patents

Description

(54) SELF-CENTERING TURNING CARTRIDGE

one

The invention relates to the field of machine tool construction and can be used to screw parts both manually and mechanically.

Closest to the invention is a self-centering lathe chuck, in the housing of which clamping cams are placed in contact with bevel gears and the connecting element of the latter with a mechanical drive 1.

The disadvantage of the known cartridge is the small stroke of the cams in one revolution of the conical gear.

Nelju invention is the expansion of the technological capabilities of the cartridge.

For this, the coupling element of the gears with the drive is made in the form of a coupling, one of the coupling halves connected to the drive is mounted with the possibility of axial movement and is placed in a ring inserted into the cartridge and located in the housing.

FIG. 1 shows the proposed cartridge, axial section; in fig. 2 is a section along A-A in FIG. one; in fig. 3 is a section along BB in FIG. 2

The self-centering chuck contains a housing 1, in the grooves of which three cams 2 are mounted, the bearings are in constant communication with each other through the caster 3 and the conical coupling half 4.

Half coupling 5, mounted with the possibility of rotation and axial movement, is in contact with the ends of the L-shaped levers 6, whose axes are fixed relative to the housing, and

the other ends are hingedly connected to the driving pull 7. In the housing 1, there is also a pivot pin 8 with an eccentric shank in contact with a groove of an axially movable ring parallel to the chuck axis.

9. In the concentric recess of the ring 9 is installed coupling half 5.

The cartridge works as follows. To manually move the cams 2 rotate the bristle 3, the movement from which through

half coupling 4 is transmitted to the remaining two bars and to cams 2, while at the same time providing synchronous movement.

To operate the mechanical drive, the coupling half 5 is engaged with the half coupling 4, turning the finger 8 with the eccentric shank in contact with the groove of the ring 9, moving the latter together with the half coupling 5 to the right (Fig. 1). When the coupling halves 4 and 5 are in engagement, they include a cranking gear 7, which, when moving in axial direction, rotates the levers 6. The ends of the levers, copying with half a half, 5, 5 make movement and forward to the cams 2.

The presence of a switching mechanism allows you to quickly change the cartridge to any size of the workpiece, work manually or mechanically, without removing the cartridge from the machine.

The proposed cartridge provides an increase in stroke cams.

Claims (1)

Invention Formula Self-centering lathe chuck, in the case of which clamping jaws are placed in contact with bevel gears and the connecting element of the latter with mechanically driven, characterized in that, in order to expand the technological capabilities, the coupling element of the gears with the drive is made in the form of a coupling, one of the coupling halves connected to the actuator is axially displaced and placed in a ring inserted into the cartridge and located in the housing. Information sources, taken into account in the examination I. Copyright certificate № 312682, cl. On 23B 31/16, 1970. (Rygl 2 B-s FIG. 3