DE3442580A1 - Device for tightening and releasing the tensioning nut of the blade packet of meat cutters - Google Patents

Abstract

The device is a force-multiplying device consisting of a plug-on component with hexagon socket and wormwheel toothing and a shaft worm which is turned by means of a change-over ratchet. The housing for bearing the worm gear formed by the plug-on component and shaft worm receives the reaction torque (= tightening torque) and is supported against rotation via bolts on a terminating disc which is attached in a positively engaging fashion on the hexagon socket of the blade shaft.

Description

Device for tightening and loosening the knife pack clamping nut

of meat cutters The invention relates to a device for attracting and loosening the knife pack clamping nut from meat cutters.

In such shredding machines are known to be preferred on one a number of so-called cutter knives designed as a hexagonal cutter shaft fastened by means of washers, cover plate and knife pack clamping nut.

Tightening and loosening the knife pack clamping nut is common with larger open-end wrenches or ratchet wrenches and also with open-end wrenches performed.

Especially with the large cutters used in the meat industry large, long-armed open-end wrenches or ratchet wrenches must be used the required high tightening torque must be applied to the knife pack clamping nut can.

The handling of these keys is very inconvenient, apart from the great effort. In addition, the cutter shaft must be opened using a second wrench or by a locking device against rotation.

That is why in practice some open-end wrenches and hammers are used dodged. This method has the disadvantage that the hard blows to the Blade shaft bearing damage can occur.

The invention is based on the object discussed above Avoid shortcomings.

This object is achieved according to the invention in that a force-multiplying Device is pushed onto the external hexagon of the knife pack clamping nut and by means of a relatively small reversible ratchet, tightening and loosening without special Exertion of force happens.

Another advantage and surprising novelty is that the new device according to the invention is supported against twisting by the reaction torque of the tightening torque directly on the > conclusive on the knife shaft seated cover plate.

Another contribution to occupational safety technology is the possibility of use a torque wrench (with reversible ratchet).

The required tightening torque can then be precisely adhered to and thus loosening of the knife during operation can be avoided.

An embodiment of the invention is shown in the drawing and is described in more detail below.

1 shows a longitudinal section through the device including Knife shaft, cutter knife, end disk and knife pack clamping nut Fig. 2 a View of the device in the direction towards the face of the knife pack clamping nut A push-on part with a hexagon socket is located in a through hole in the housing (7) and worm gear teeth (8) mounted and axially held by the sheet metal disks (9).

The shaft worm (10) is by means of the radial bearings (11 and 12) as well the axial roller bearing (13) mounted in a transverse bore of the housing (7) so that the worm gear meshes with the worm gear teeth of the plug-on part (8) is located.

One or more bolts (14) are screwed onto the housing (7) and fastened with cap nut (s) (15), which one end in one or more holes or recesses (16) of the cover plate (3) engage with a hexagon socket.

A socket (17) is fixed on one end of the worm shaft (10) attached, which has an inner square hole on the outer side.

A commercially available reversible ratchet (19) is inserted into the latter.

If you now operate the reversible ratchet (19) by hand on the handle (20), in this way the screw shaft (10) and thus the plug-on part (8) are rotated. The knife pack clamping nut (6) is thus tightened or loosened and that from the cover plate (3), cutter knives (1) and washers (2) clamped or loosened the existing knife pack.

The reaction force (= tightening torque) occurring on the housing (7) is absorbed by the bolts (14) directly on the cover plate I3), since it is fixed with its hexagon socket is firmly attached to the hexagon of the knife shaft t4).

With a gear reduction of about 1:45 from the shaft worm (10) clamps on the slip-on part (8) or if you loosen the knife pack clamping nut (6) with little effort on the handle (20) of the reversible ratchet (19).

The latter is also commercially available as a torque wrench, so herewith the required tightening torque can be preselected.

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Claims (2)

Device for tightening and loosening the knife pack clamping nut from Meat cutters Device for tightening and loosening the knife pack clamping nut of meat cutters, which does not indicate that by means of a the external hexagon of the slip-on part (8) comprising the knife pack clamping nut (6), which has a worm gear toothing on the outer circumference, as well as the one therein engaging shaft worm (10) and the reversing ratchet located on the latter (19) the knife pack clamping nut (6) is rotated and thus tightened or loosened. 2. Apparatus according to claim 1, characterized in that the slip-on part (8) and the worm shaft (10) are mounted in a housing (7) which, by means of one or more bolts (14), engages in one or more recesses ( 16) the one on the knife shaft (4) «T conclusive attached cover plate (3), is supported against rotation.