DE7034350U - DEVICE FOR SECURING CRUSHING OR GRINDERS. - Google Patents

Description

MIAG 07-09.70 Pat / SoAa

(EM 48)

Device for securing crushers or grinders 55 3 3 SI 3 SX S SX SB KS 3 SS 3 Si HS 3 B SI 3 SB SB S SI 3 XK 3 Bl WB 3K B St ^ WSS SSt 3 S BS 3 3B Λ SI SI β β SI SBSC SI 1 ^ V Bj SI

The invention relates to a device for securing crushers or grinders with a fixed and a Loswalze whose distance to the plague roller with a known Actuating tool can be set, which is at the free end of the bearing of the loose roller bearing, other end in Housing pivotable lever engages.

There is a risk with setting witnesses of the type described destruction if a hard object is drawn in between the rollers, which causes the rollers to suddenly move apart, as is the case in particular with metal parts can do. You already have the tools, respectively the ends of the levers carrying the lot% "- jzo hydraulically supported. However, this measure of time is common to many In some cases, this is not sufficient, as dynamic pressures that are too high occur and destruction cannot be avoided.

According to the invention, a better security of the setting tools described above is avoided by a Axially connected to the actuating tool cylinder with two pistons, on one of which the bearing lever for the loose roller attacks and the other is fixed by means of a shear pin in the cylinder, one of its two end faces interconnecting pressure medium channel as well as a stop surface serving to limit the piston path ·.

If smaller and / or only tough objects get into the grinding gap, the hydraulic oil is displaced in many cases be sufficient to avoid destruction.

703435On. 1.71

MIAG - 2 - 07.09-70 Pat / Sv / Za

(EM V \ 82)

If, however, larger and / or harder objects get into the malile gap, when a certain oil pressure is exceeded,

gerisaen and the collecting flask can evade without any considerable resistance. This not only sets the stage from destruction but also protects the roller surface from damage.

The invention is based on an embodiment that is shown in the drawing, explained in more detail below, show therein

Fig. 1 is a simplified representation of d. ^ R rollers with your equipment and the hydraulic equipment,

Fig. 2 is a longitudinal section through the invention trained cylinder of the setting tool and

FIG. 5 is a plan view of the cylinder according to FIG. 2.

The fixed roller 3 is mounted in the housing 1 of a roller frame. The articulated in the bracket 5 of the housing 1 bearing lever 4- carries the loose roller 2 and protrudes with his free end into a cylinder 9 which is connected via the screw to the eccentric adjuster 6 actuated by the hand lever 7 is. In addition, a hydraulic pump 12 is also provided, which is fed via the line 13 and via the hose 10 with the end of the intercepting piston protruding from the cylinder 9 14 'is connected; in this line i3t a branch a pressure limiter 11 is provided.

The cylinder 9, which is guided in a longitudinally displaceable manner in grooves 9I closed with a screw cap 15 on the left, in which Central bore the stepped part 14 'of the piston 14- slides. The end part 14- of the intercepting piston is slidable against the cylinder

MIAG - 3 - O7.O9.70 Pat / Sv / Za

(EM 1482) '

linder 9 sealed. A shear pin 16, which extends into the cover 15 of the cylinder 9, is arranged radially in the stepped part 14 ′ of the intercepting piston. Through both piston parts 14,1V extending therethrough acheparallel a HydraulikbohrunE · 17. In iitvM σ η int & rts "T"s'hcroRis-tT'y.tTi * * >> f 2 "^^ 0lbenteil I"'transverse to the bore for the Shear pin 16 is provided with a flattened area 18 in order to prevent deformations occurring when the shear pin 16 is torn off, the sliding ability of the piston not being impaired. The bearing lever 4 is supported by means of the ball 19 in a manner known per se against the push piston 20 on the one hand and the setting piston 21 on the other hand.

If a smaller and / or tough workpiece is placed between the rollers, the bearing lever 4 deviates to the left, with the impact piston 20 drives out the oil located in the space 22 between the pistons 14 and 20 through the bore 17. The oil displaced in this way can flow back through the pressure limiter 11 into the sump. As the foreign body has left the grinding gap, the pump 12 takes care of the refilling of the space 22, whereby the impact piston 20, the ball 19 »the bearing lever 4, the setting piston 21 against the force the spring 23 is moved back until it is seated and in this way the originally present Mahlspslt again as quickly as possible will be produced.

However, if larger and / or harder foreign bodies get into the grinding gap, Such a high dynamic pressure can arise in the space 22 between the pistons 14 and 20 that the shear pin 16 constricts at its Tear off point and the intercepting piston 14, 14 'is moved to the left, leaving enough clearance free for the Allow foreign bodies to pass through the grinding gap without damage of any kind. Now emerges the end of the Flattening 18 in the central bore of the cylinder cover 15, this creates a space 24 which is closed on all sides and which, due to the compression of the enclosed air, causes the End face 25 of the intercepting piston 14 on the end face 26 of the

MIAG - 4 - 07.09-70 Pat / Sv / Za

(EM 14-82)

Cylinder cover 15 prevented. Effective through the uninfluenced Remaining oil pressure is also ensured in this case that the bearing lever 4 on the push piston 20 and the Ball 19 can be reset immediately. The recessed part of the intercepting piston 14 'protrudes from the cylinder cover 15 out and remains in this position. Through this the operator is shown that the shear pin is torn through. Of course, a signal can also be triggered. The in the detached collecting flask part 14 ' Any piece of the destroyed shear pin 16 that is located can simply be pushed out. After removing the oil pressure you can push the intercepting piston into the cylinder so far that what remains in the cylinder cover 15 of the cylinder 9 Piece of the shear pin 16 pushed into the bore of the intercepting piston 14 'and then after moving it out again of the piston can be eliminated.

The shear pin 16 can, if the circumstances so require, also be continued so that its two ends in the Cylinder cover 15 are located and accordingly there are two tear-off points.

Claims (3)

MIAG - 5 - 07.09.70 Pat / Sv / Za (EM 1482) protection claims 1. ^νί . .. "ichtung to secure crushing or grinding works with a plague and a loose roller, their distance to the
The fixed roller can be adjusted with a known adjusting tool which engages the free end of a lever which is pivotable in the housing and carries the bearing of the loose roller, characterized by a cylinder (9) with two pistons connected axially to the adjusting tool (6 to 9), one of which, the impact piston (21), is engaged by the bearing lever (4) and the other, the intercepting piston (^, 14 ')
is fixed by means of a shear pin (16) in the cylinder (? / ■ or (15), a pressure medium channel (17) connecting its two end faces with one another and a stop surface (25) serving to limit the piston travel.;. ·· ': 2. Apparatus according to claim 1, characterized in that the intercepting piston having the pressure medium channel (17)
(14, 14 ') are set down to a smaller diameter for the purpose of generating the stop surface (25) and this piston part (14') has a flat (18) in the area of the bore for the sciing pin (16). 3. Apparatus according to claim 1 or 2, characterized in that the cylinder (9) one of the stop surface (25) of the Catching piston (14) has corresponding counter-stop surface (26), which is passed through the inner end surface of the cylinder cover can be formed.