DE8017622U1 - CRUSHING DEVICE WITH IMPACT BARS IN IMPACT CRUSHERS - Google Patents

Description

Il / d / 1804 G

ARBED S.A., avenue de la Liberte LUXEMBOURG

■ ^ Breaking device with blow bars in impact crushers / »

The present invention relates to a crushing device with impact bars in impact crushers.

Impact crushers or impact mills are crushing devices that are primarily used for further crushing of crushed material that are pretreated during mining by blasting and shoveling of any kind or by primary crusher and is to be prepared for fine chopping. Impact crushers generally understand one with several Rotor equipped with blow bars, which can be driven in both directions for certain applications, as well as praliw £. ~ de against which the crushed material is thrown will.

One of the main points to consider when choosing a crusher with a certain working principle is the type of behavior of the material to be crushed in the crusher.

In general, impact crushers are used to reduce the size of hygroscopic, rapidly setting crushed material not recommended, if fast-setting material accumulates and there is no suitable device at hand, it will happen with the inevitable interruption of the crushing process for cleaning, readjustment or replacement of the individual Blow bars to difficulties, because just hygroscopic crushed material, which the blow bars and their holders surrounds, sets quickly and makes it difficult to loosen the 5 blow bars from their brackets.

Schioßbleiche 20. P.O. Box 130219 D-5600 Wuppertal 1 Patent Attorney Dr.-Ing. Dipl.-Ing A. SoIf

Telephone (0202) 445096/451226 Telex 8591273 sqza Patent attorney Dipl.-Ing. Chr. Zapf

: DR.SOLF & ZAFF

Approved representatives at the European ^ ji.Pat ^ lamt ".. ' European patent attorneys

Furthermore, when reinstalling or readjusting the blow bars, if the fastening elements are not cleaned carefully there is a risk of inadequate fastening of the blow bars, especially if they are by means of Screw connections takes place. There is also the risk that attempts are made to treat insufficiently cleaned screw threads and fittings with force, which leads to wear leads and calls into question the operational safety.

For these reasons it is desirable to have a fastening system for blow bars in impact crushers that are reliable even under extremely difficult conditions and at the same time is easy to handle, and that with regard to mechanical stress from impact and is insensitive to shock.

The aim of the invention was to provide such a fastening system to develop.

This goal is achieved that the provided with adjusting grooves The blow bars are jammed with the rotor of the impact crusher and the rotor has a guide for each blow bar. and grasps holding element that engages in one of the adjustment grooves of the blow bar, as well as a cam against which the opposite surface of the blow bar is supported, with a locking wedge between the cam and the blow bar which is held firmly by means of a U-shaped holding piece-5. Depending on the length of the rotor, one or several blow bars are strung together.

According to the invention, the U-shaped holding piece encloses the cam and is attached to it by means of a through bolt .

It is further provided according to the invention that the push-through bolt is secured by means of a split pin.

Schloßbleiche 20, Postfach 130219 D-5600 Wuppertal 1 Patent attorney Dr.-Ing. Dipl.-Ing. A. SoIf

Telephone (0202) 445096/451226 TeIe. * 85,9,1273 sc & a, patent attorney Dipl.-Ing. Chr. Zapf

ARBED SA .... _t . ......

The basic idea of the invention is based on the fact that a type of fastening of the blow bar that acts by clamping the conventional, be preferable to fixings made by screwing or by means of guides or brackets must, especially when it comes to crushing fast-setting crushed material in an impact crusher. In the Indeed, a clamp fastening can be loosened by light blows of the hammer and fixed without any problems, which is both in the sense of a rapid expiry of the dipping and adjustment processes as well as simplicity of those to be carried out by the staff Work and the required tools.

The core of the invention is that the actual fastening of the blow bar on the one hand by means of an in her attached groove takes place, in which the counterpart guide and holding element engages and on the other hand by means of two locking wedges, which are fastened relatively loosely, the locking wedges between the blow bar and the beveled cam and the cams sit between the rotor body and the locking wedges. Too much play between the locking wedges and the U-shaped ones Holding pieces are compensated by means of compensating lining plates.

One of the edges of the U-shaped holding piece is made longer and designed as a locking edge. It engages in a groove provided in the blow bar and prevents a sideways movement The blow bar slides out of its position. This edge is beveled, which means that when the blow bar is removed an independent sliding out of the U-shaped holding piece from the holding groove can be achieved.

Further advantages and features are evident from the description of the drawings, of which FIG. 1 shows a cross section through an impact crusher rotor equipped with the fastening system according to the invention, while FIG. 2 shows a longitudinal section through the same rotor.

| l 'ARBED SA

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The rotor shown is equipped with four blow bars. Man; ^{% l} recognizes the blow bar (1) in Fig. 1 , which has 3 adjusting grooves). This means that the bar can be turned three times, so-

! V as a double readjustment enables what a nearly f 5 brings 70% utilization of the strip material with it. The ί use of such blow bars guarantees the

'i work in 2 directions of rotation for optimum performance

"'On service life, material utilization, efficiency and maintenance

■ S costs, as well as an almost constant grain size.

{ 10

f You can also see the guide and holding piece (2) in the

The adjustment groove (10) of the blow bar engages, the fixed cam (7) against which the blow bar is supported by the two locking wedges (3).
15th

The U-shaped retaining piece (4) or (4 ¹ ) encloses the locking wedges (3) and the compensating chuck (5) and is held on the cam (7) by means of the push-through bolt (6), the bolt (6) through the split pin (8) is protected. 20th

The retaining piece (4) or (4 ") is designed so that it can only be used in can be installed in the intended position, eliminating any mistake.

As can be seen from FIG. 2 , an elongated leg (9) of the U-shaped holding piece (4 ') engages in a groove (9 ¹ ) provided in the blow bar. This locking edge (9) prevents the blow bar from sliding out of the holder.

The one for removing the blow bars from the fastening system according to the invention Required tools are limited to hammers and crowbars, those with no special manual skills can be handled.

It should also be emphasized that in the fastening system according to the invention neither thread nor exact fitting pieces are used, but only clamping parts, lining plates and Bolts that can easily withstand any mechanical stress.

Claims (7)

1. Crushing device, especially in impact crushers, consisting of a rotor and attached to it, blow bars provided with adjusting grooves, characterized in that the Blow bars (1) are attached by clamps and the rotor has a guide and per blow bar (1) Holding element (2) grasps that engages in one of the adjusting grooves (10) of the blow bar, as well as two cams (7) against which the opposite surface of the blow bar is supported, with between the cam (7) and the blow bar (1) have two locking wedges (3) which are secured by means of U-shaped retaining pieces (4) or (4 ') are recorded. 2. breaking device according to claim 1, characterized characterized in that the U-shaped Holding pieces (4) and (4 ¹ ) enclose the cam (7) and are attached to the latter by means of a through bolt (6). Schloßbleiche 20, Postfach 130219 D-5600 Wuppertal 1 Patent attorney Dr.-Ing. Dipl.-Ing. A. SoIf Telephone (0202) 445096/451226 Telsx: 8591273 soza. , Patent attorney Dipl.-Ing. Chr. Zapf j DR SOLF & ZAPP | ^l Authorized representative at the European Patriotic Office ! '■ European patent attorneys 3. breaking device according to claim 1 or 2, characterized in that the through bolt (6) is secured by means of a split pin ¹ -. 4. breaking device according to claims 1 to 3, d a characterized in that one of the edges (9) of the holding piece (4) is designed as a locking edge, which is in a, in the blow bar provided groove (9 ') engages. 5. breaking device according to claim 4, characterized characterized in that the locking edge (9) is beveled. 6. breaking device according to claims 1 to 5, characterized in that between the locking wedges (3) and the U-shaped retaining pieces (4) and (4 ') compensating lining plates (5) are located. 7. breaking device according to claims 1 to 6, characterized in that one or several blow bars (1) lined up according to the required length of the rotor are. Schloßbleiche 20, Postfach 130219 D-5600 Wuppertal 1 Patent attorney Dr.-Ing. Dipl.-Ing A. SoIf Telephone (0202) 4450S6 / 451226 τβ) 6 * · .Β39127.3 suiä \ . j | · ";■" · Patent attorney Dipl.-Ing. Chr. Zapf