CZ298546B6 - Device for controlling disengagement of driving wheel train - Google Patents

Abstract

In the present invention, there is disclosed a device for controlling disengagement of driving wheel train, particularly for controlling disengagement of driving wheels of a sheet printing machine using a friction clutch comprising a friction disk (11) fitted between a pair of toothed wheels, which device consist of at least one adjusting screw (1) and at least one profiled track (6) performed on a shaped disk (4). A lever (2) engaging into the profiled track (6) of a cam disk (4) is mounted on the adjusting screw (1) passing through a flange (5) and screwed in the toothed wheel (10) and pressing the friction disk (11). Said cam disk (4) profiled track (6) has a form enabling, after mutual angular displacement of the cam disk (4) and the flange (5), angular displacement of the lever (2) in order to turn a slight amount of the adjusting screw (1) and thus axial shift thereof.

Description

Technical field

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for controlling the disengagement of a drive wheel chain, and more particularly to an apparatus for controlling the disengagement of a drive wheel chain of a printing sheet machine. sheet to sheet invert mode and vice versa, and when the format of the inverted sheet is changed.

BACKGROUND OF THE INVENTION

At present, a large number of different designs are known which solve the problem of operating the clutch of the two sprockets when changing the format when the printing machine is changed.

CS 261245 discloses a coupling of two sprockets of a printing sheet-fed machine. The clutch is formed by a releasable friction connection between two gears arranged coaxially to one another. The first gear serves to drive the second printing device. The second gear forms an output for driving the first printing device, so that when the clutch is disengaged, one printing device can be stopped. The cranked single-arm lever rests on the side of the first gear. With the clutch engaged, the pivoting point of the knuckle lever arm on the wearer of the braking force acting with the clutch engaged. A remote-switching actuator is connected to the single-arm lever. This solution is relatively structurally complex. It is also spatially dimensional. Due to the complicated construction, it is also difficult to manufacture and thus economically disadvantageous.

CS 261244 discloses a further two-strand clutch of a printing-sheet printing machine for adjusting the transfer roller of the sheets when printing in different formats, which is provided in the sprocket. The connection of the gear wheel and the gear ring is formed by a pressure oil coupling, being controlled by a switched pressure oil source. The main disadvantage is that the working pressures in the hydraulic circuit are high, which requires a considerably sized distribution. This, together with the cost of ensuring the ecology of operation, makes this solution considerably more expensive.

It is an object of the present invention to provide a two-row linkage control design that is simple and seamless to automate.

SUMMARY OF THE INVENTION

To a certain extent, these problems are overcome and the object is achieved by an apparatus for controlling the disengagement of the drive wheel chain, in particular to control the disengagement of the drive chain of the printing press by means of a friction clutch comprising a friction disk. it consists of at least one control screw and at least one profile track formed on the cam disc.

On the control screw passing through the flange, helically mounted in the gear and overpressing the friction disc, a lever engages in the profile path of the cam disc. The profile track has a shape which, when the cam disk and the flange are rotated relative to each other, allow the lever to be rotated such that the control screw is rotated and thereby axially displaced, the control screw controlling the friction disk by its axial displacement.

In a most preferred embodiment, the flange is stationary while the cam disc is pivoted.

-1 CZ 298546 B6

Given that loosening or tightening of all or a plurality of bolts simultaneously could result in a one-time overload of the drive mechanism that rotates the cam disc, it is preferred that the individual profile paths formed around the circumference of the cam disc be angularly irregularly spaced so that The angular rotation of the individual levers is different between the cam disk and the flange, thus reducing the torque on the cam disk and distributing the load on its drive mechanism.

The profile track has a shape that allows the lever to pivot about the axis of the screw, thereby releasing the entire mechanism. By reversing the cam disc and thereby moving the lever along the profile path, the bolt moves back in the axial direction and thereby re-establishes a seam connection between the flanges on which the printing wheels of the printing sheet machine are mounted.

In a most preferred embodiment, the lever fits into the cam disc by a roller mounted on a pin mounted in the lever. It is also advantageous if the lever is fastened to the screw by means of a clamp connection.

The apparatus for controlling the disengagement of the drive wheel chain according to the invention has a relatively simple construction, which is simple to manufacture and thus inexpensive, while at the same time ensuring a completely reliable and trouble-free operation of the entire device. The cam disk can be simply connected to a drive that is located in the cavity of the gear flange.

Overview of the drawings

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic view of the device according to the invention when the levers have been rolled over and the clutch released; FIG. 2 is a schematic view of the device according to the invention when the levers are turned into the clutch engaging position; and Fig. 3 is a cross-sectional view of a control screw seat.

DETAILED DESCRIPTION OF THE INVENTION

The device for controlling the disengagement of the drive wheel chain consists of six control screws 1 and six profile tracks 6 formed on the cam disc 4. The individual control screws 1 are screw-mounted in the gear 10 and at the same time pass through the flange 5.

On each control screw 1, a lever 2 fits into the profile track 6 is mounted. The profile track 6 has a shape which, when the cam disc 4 and the flange 5 rotate relative to each other, allow the lever 2 to rotate so that the control screw 1 is rotated displacement.

The device controls the friction clutch located between the pair of gears 7, 10. The friction clutch is formed by a friction disc 11 which, by means of an axial bearing 12, rests on the shoulder 13 of the control screw 1. The control screw 1, by its axial movement, controls the pressing of the friction disc 11 against the wall of the gear 7.

Individual profile tracks 6 are irregularly distributed around the circumference of the cam disc 4. Thus, the angular rotation of the individual levers 2 is different, the profile track 6 having a shape which allows the lever 2 to be rotated about the axis of the control screw L

The lever 2 fits into the cam disc 4 with a roller 3 mounted on a pin 8 mounted in the lever 2. The lever 2 is fixed to the control screw 1 by means of a snap joint 9.

-2GB 298546 B6

Industrial applicability

The apparatus for controlling the disengagement of a drive wheel chain according to the invention is particularly useful in changing the mode of the printing sheet machine from the inverted mode to the non-inverted mode and vice versa, and in changing the format of the inverted sheets.

Claims (5)

PATENT CLAIMS An apparatus for controlling the disengagement of a drive wheel chain, in particular for controlling the disengagement of a drive wheel chain of a printing sheet machine by means of a friction clutch comprising a friction disk (11) disposed between a pair of gears (7, 10). a screw (1) and at least one profile track (6) formed on the cam disc (4), the control screw (1) passing through the flange (5), screwed in the gear (10) and pressing the friction disc (11), a lever (2) fits into the profile path (6) of the cam disc (4), the profile path (6) of the cam disc (4) having a shape which after turning the cam disc (4) and the flange (5) allows the lever ( 2) to rotate the control screw (1) and thereby to move it axially. Drive chain disengagement control device according to claim 1, characterized in that the individual profile tracks (6) are irregularly distributed around the circumference of the cam disc (4) such that when the cam disc (4) and the flange (5) are rotated relative to each other. the angular rotation of the individual levers (2) is different. Drive chain disengagement control device according to claims 1 and 2, characterized in that the profile path (6) of the cam disc (4) is shaped to allow the lever (2) to pivot about the axis of the control screw (1). Drive chain disengagement control device according to one of the preceding claims, characterized in that the lever (2) fits into the cam disc (4) by a roller (3) mounted on a pin (8) mounted in the lever (2). Drive chain disengagement control device according to one of the preceding claims, characterized in that the lever (2) is fixed to the control screw (1) by means of a clamp connection (9).