DEVICE FOR A CRUSHER

Abstract

A device for a crusher comprises a frame (2) for a crushing chamber (8). The frame comprises a crossmember (1), and the crushing chamber is delimited by a crushing jaw (5) that is drivably connected to a reciprocating piston (4) inserted into a hollow cylinder (3). To reduce the material fatigue, the weight and the space requirements of the device while achieving the same mechanical stability, the swept volume of the hollow cylinder (3) lies completely within the crossmember (1).

Claims

1. A device for a crusher, said device comprising: a frame for a crushing chamber, which frame comprises a crossmember, a crushing jaw delimiting the crushing chamber said crushing jaw being drivably connected to a reciprocating piston inserted into a hollow cylinder so as to define a swept volume therein, wherein the swept volume of the hollow cylinder lies completely within the crossmember.

2. The device according to claim 1, wherein the crossmember has a recess therein so as to form the hollow cylinder which, together with the reciprocating piston inserted therein, delimits the swept volume.

3. The device according to claim 1, wherein the crossmember has bearing bodies that engage positively in bearing receptacles of the frame so as to secure the crossmember against rotation relative to the frame.

4. The device according to claim 1, wherein the crushing jaw is pivotable relative to the crossmember about a pivot axis substantially parallel to a conveying direction of material crushed by the device.

5. The device according to claim 1, wherein at least one additional hollow cylinder is supported on the frame, the hollow cylinders having swept volumes that lie completely within the crossmember and stroke paths that are controlled in groups.

6. The device according to claim 2, wherein the crossmember has bearing bodies that engage positively in bearing receptacles of the frame-so as to secure the crossmember against rotation relative to the frame.

7. The device according to claim 2 wherein the crushing jaw is pivotable relative to the crossmember about a pivot axis substantially parallel to a conveying direction of material crushed by the device.

8. The device according to claim 3 wherein the crushing jaw is pivotable relative to the crossmember about a pivot axis substantially parallel to a conveying direction of material crushed by the device.

9. The device according to claim 6 wherein the crushing jaw is pivotable relative to the crossmember about a pivot axis substantially parallel to a conveying direction of material crushed by the device.

10. The device according to claim 2, wherein at least one additional hollow cylinder is supported on the frame, the hollow cylinders having swept volumes that lie completely within the crossmember and stroke paths that are controlled in groups.

11. The device according to claim 3, wherein at least one additional hollow cylinder is supported on the frame, the hollow cylinders having swept volumes that lie completely within the crossmember and stroke paths that are controlled in groups.

12. The device according to claim 4, wherein at least one additional hollow cylinder is supported on the frame, the hollow cylinders having swept volumes that lie completely within the crossmember and stroke paths that are controlled in groups.

13. The device according to claim 6, wherein at least one additional hollow cylinder is supported on the frame, the hollow cylinders having swept volumes that lie completely within the crossmember and stroke paths that are controlled in groups.

14. The device according to claim 7, wherein at least one additional hollow cylinder is supported on the frame, the hollow cylinders having swept volumes that lie completely within the crossmember and stroke paths that are controlled in groups.

15. The device according to claim 8, wherein at least one additional hollow cylinder is supported on the frame, the hollow cylinders having swept volumes that lie completely within the crossmember and stroke paths that are controlled in groups.

16. The device according to claim 9, wherein at least one additional hollow cylinder is supported on the frame, the hollow cylinders having swept volumes that lie completely within the crossmember and stroke paths that are controlled in groups.

17. A device for crushing material, said device comprising: a frame having two spaced walls with a crushing chamber defined therebetween; said frame having a transversely extending crossmember between the walls; a hollow cylinder supported on the frame, said hollow cylinder having a recess supporting a piston therein for reciprocating movement, said piston and the hollow cylinder defining a swept volume in the hollow cylinder defined by the reciprocating movement; a crushing jaw delimiting the crushing chamber, the crushing jaw being movably supported on the frame and connected with the reciprocating piston so as to move with the reciprocating movement thereof so as to crush material in the crushing chamber; wherein the swept volume of the hollow cylinder lies completely within the crossmember.

18. The device according to claim 17, wherein the hollow cylinder is formed as a part of the crossmember, such that the recess in the hollow cylinder is in the crossmember.

19. The device according to claim 17, wherein the walls of the frame have bearing receptacles and the crossmember has bearing structures that are received in said bearing receptacles so as to secure the crossmember against rotation relative to the frame.

20. The device according to claim 17, wherein the crushing jaw pivotable relative to the crossmember about a pivot axis substantially parallel to a conveying direction of the material crushed by the device, and an additional hollow cylinder is supported on the cross member, said additional hollow cylinder having a respective piston that is supported therein for reciprocating movement that defines a swept volume for said additional hollow cylinder that is completely within the crossmember; said piston in the additional hollow cylinder being connected with the crushing jaw; and the reciprocating movement of the pistons in the hollow cylinders and stroke lengths thereof being controlled together so as to cooperatively move the crushing jaw to crush the material in the crushing chamber.

Description

BRIEF DESCRIPTION OF THE INVENTION

[0012] In the drawing, the subject matter of the invention is shown by way of example, wherein:

[0013] FIG. 1 shows a side view of a device according to the invention and a crushing chamber,

[0014] FIG. 2 shows a detailed view of the device corresponding to FIG. 1 on a larger scale,

[0015] FIG. 3 shows a section along line III-Ill of FIG. 2 and

[0016] FIG. 4 shows a perspective view of the device on a smaller scale.

BRIEF DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0017] A device according to the invention comprises a crossmember 1 which is mounted in a frame 2. The crossmember 1 has hollow cylinders 3 whose swept volumes lie completely within the crossmember 1. A reciprocating piston 4 is inserted in each of the hollow cylinders 3, which is drive-connected to a crushing jaw 5 and forms a lifting system that can be operated, for example, by means of a hydraulic working medium. The drive connection can be established via a predetermined breaking plate 6, which is placed on the reciprocating pistons 4 via a connecting element 7. The crushing jaw 5 is driven via an eccentric and delimits a crushing chamber 8, wherein the position of the crushing jaw 5 and thus the resulting crushing gap can be adjusted by the lifting system. In this context, the crushing jaw 5 can additionally be connected to the frame 2 in tension via a retraction mechanism, such as a spring 9, the restoring force of which ensures a continuous connection between the crushing jaw 5 and the crossmember 1. As can be seen in FIG. 3, particularly preferred design conditions result when the hollow cylinders 3 are formed as recesses of the crossmember 1, since in this case the compressed working medium in the swept volume stiffens the hollow cylinders 3 against mechanical loads. If an uncrushable object enters the crushing chamber 8, the forces caused by this object are transmitted via the reciprocating pistons 4, which are drive-connected to the crushing chamber 8, to the crossmember 1, from which the forces are transmitted to the frame 2 in a manner that is as gentle as possible on the material and, above all, non-destructive. For this purpose, bearing bodies 10 are provided which positively connect the crossmember 1 to the frame 2 secured against rotation. The reciprocating pistons 4 can compensate for deformations of the crushing jaw 5 caused by uncrushable objects by varying the stroke paths in their hollow cylinders 3.