CS277247B6 - Machine for rotating and positioning the cutter head of a machine tool - Google Patents

Abstract

The device is mounted on a pin (11) provided with a rotatably mounted pinion (6), which is in engagement with the rack gearing (21) of the piston (7) and with the internal gearing (19) of the locking clutch (5), attached to the slidingly mounted outer piston (8) inside the knife holder (4). The shape of the gearing of the locking clutch (5) is identical to the shape of the front gearing (17) of the inner clutch (2) and the outer clutch (3) attached to the support (1) of the machine tool. The locking clutch (5) with the internal gearing (19) is located in the recess (23) of the pinion (6), rotatably mounted on the pin (11).

Description

Field of technology

The invention relates to a device for turning and securing the position of the knife head of machine tools, used in particular in turning, numerically controlled machines.

Prior art

Known and hitherto used devices for turning and securing the position of the knife head of lathe machine tools use electric or hydraulic motors with mechanisms ensuring the release and clamping of the knife heads. The knife head is rotated to the desired position by means of gears and ridges which, in conjunction with the displacement and rotary rotation mechanisms, position the knife head. The devices for unlocking and securing the position of the knife head consist of a combination of cams with latches, locking members or front toothed couplings connected to the turning mechanism of the knife head.

An example of such an embodiment is a device for rotating and securing the position of a knife head of a machine tool, which is fastened by means of a pin and a nut to a support of the machine tool. A pinion is rotatably inserted on the pin, which engages with the ridge toothing of the hydraulic piston and with the internal toothing of the locking clutch. The hydraulic piston is located in the support of the machine tool and the locking coupling is fixed to a sliding, inside knife holder, mounted outer piston, which is provided with an inner piston. The shape of the toothing of the locking clutch and the shape is identical to the shape of the spur gearing of the inner clutch and the shape of the spur gearing of the outer clutch attached to the support and connected by a pin to the locking clutch attached to the knife holder.

With this device, it is not possible to move the piston engaging the pinion rotatably mounted on the pin after inserting the locking coupling into the outer coupling and the inner coupling, because the inner toothing of the locking coupling is in constant engagement with the pinion gear rotatably mounted on the pin. The length of the piston becomes a limiting factor in the range of rotation of the knife head.

The essence of the invention

Deficiencies related to the use of the existing solution of the secured position of the knife head and its rotation are eliminated by the solution, according to the essence of which a locking coupling with internal gearing is placed in the recess of the pinion rotatably mounted on the pin. In this case, the length of the piston does not become a limiting factor in the range of rotation of the knife head. The knife head can be rotated in both directions and by several consecutive positions.

Overview of pictures in the drawing

The attached drawing shows a longitudinal section of an exemplary embodiment of the device according to the invention.

Examples of embodiments of the invention

The device according to the drawing consists of a pinion £ with a toothing 20,

CS 277247 B6 2 rotatably mounted on a pin 11. The pinion 6 is provided with a recess 23 around its entire circumference.

In the locked position of the knife head; this is in the state where the locking coupling 5 with the spur gear (not shown) engages in the outer coupling 3 with spur gear 16 and the inner coupling 2, fixed to the support 1 with spur gear 17; a locking coupling 5 with internal gearing 19 is located in the recess 23. Before turning the knife head to the desired position, the locking coupling 5 is axially pulled out of the recess 23 and moved to the toothing 20 of the pinion 6. The movement of the locking clutch 5 is completed when the face 18 of the inner piston 14 rests on the front surface 22 of the locking clutch 5, slidably mounted inside the knife holder 4 mounted on the outer piston 8. After turning the knife head and then returning the locking mechanism to the locked position moving the piston 7, with the rack toothing 21 engaging the toothing 20 of the pinion 6, to the initial position, thus allowing the knife head to rotate gradually by several positions. .

The device according to the invention can be used in particular for multi-knife heads of semi-automatic and automatic lathe machine tools.

Claims (1)

PATENT CLAIMS Device for turning and securing the knife head of a machine tool, formed by a pin on which a pinion is rotatably mounted, which engages with the rack toothing of the piston and the internal toothing of a locking coupling attached to a slidably mounted outer piston and provided with toothing identical to the spur internal and external couplings attached to the machine tool carriage, characterized in that the locking coupling (5) with internal gears 19) is located in a recess (23) of the pinion (6) rotatably mounted on the pin (11).