SECURING THE SHAFT IN A CONE CRUSHER

Abstract

A cone crusher may include a crushing cone held on a driven eccentric bushing. The eccentric bushing may rotate in a radial direction about a spindle. The spindle may be fixedly clamped in a spindle receptacle provided in a housing lower part. The spindle may comprise a cylindrical upper bearing portion that is braced in a bore that forms the spindle receptacle by way of an upper mechanical clamping device.

Claims

1.-10. (canceled)

11. A cone crusher comprising: a housing lower part having a spindle receptacle; a spindle that is fixedly clamped in the spindle receptacle of the housing lower part; a driven eccentric bushing that is disposed about the spindle and rotates radially; a crushing cone held on the driven eccentric bushing; and an upper mechanical clamping device that braces a cylindrical upper bearing portion of the spindle in a bore that forms the receptacle of the housing lower part.

12. The cone crusher of claim 11 further comprising a lower mechanical clamping device that clamps a cylindrical lower bearing portion of the spindle in a lower region of the bore.

13. The cone crusher of claim 12 wherein each of the upper and lower mechanical devices comprises a clamping set that includes a conical inner ring and a conical outer ring that acts as a pressure ring, wherein the conical inner and outer rings are closed rings.

14. The cone crusher of claim 13 wherein the clamping set of the upper mechanical device is received in an annular space of the spindle receptacle, wherein the clamping set of the lower mechanical device is received in an annular space of the cylindrical lower bearing portion of the spindle.

15. The cone crusher of claim 13 wherein the clamping sets are commercially available, wherein dimensions of the spindle and the spindle receptacle are configured to correspond to dimensions of the commercially available clamping sets.

16. The cone crusher of claim 15 wherein the conical outer ring of each clamping set that acts as the pressure ring is a first pressure ring, wherein each of the clamping sets further comprises a second closed pressure ring, wherein the first and second pressure rings lie one behind the other, wherein each of the pressure rings is braced via a separate screw assembly.

17. The cone crusher of claim 15 wherein the clamping sets each further comprise a slotted inner ring and a slotted pressure ring.

18. The cone crusher of claim 13 wherein the clamping set of the upper mechanical device is oriented so that the conical inner ring lying against the cylindrical upper bearing portion tapers downward toward the cylindrical lower bearing portion, wherein the clamping set of the lower mechanical device is oriented so that the conical inner ring lying against the cylindrical lower bearing portion tapers upward toward the cylindrical upper bearing portion.

19. The cone crusher of claim 18 wherein the clamping set of the upper mechanical device can be braced by fasteners, heads of which are accessible from above when the eccentric bushing is removed, wherein the clamping set of the lower mechanical device can be braced by fasteners, heads of which are accessible from below.

20. The cone crusher of claim 11 wherein the spindle receptacle comprises a stop wherein a larger bore diameter at the cylindrical upper bearing portion transitions to a smaller bore diameter at a cylindrical lower bearing portion, wherein the spindle includes a transition from a larger bore diameter at the cylindrical upper bearing portion to a smaller bore diameter at the cylindrical lower bearing portion.

Description

PREFERRED EXEMPLARY EMBODIMENT OF THE INVENTION

[0018] A particular embodiment of the cone crusher according to the invention is explained in more detail below with reference to the figures, in which:

[0019] FIG. 1 shows a section through the head of the cone crusher, and

[0020] FIG. 2 shows a detail comprising the conical clamping sets.

[0021] FIG. 1 first of all illustrates a section through the head of the cone crusher according to the invention. The material for crushing that is fed to the cone crusher is comminuted here between the fixed crushing ring 1 of the housing upper part 2 and the crushing cone 3 sitting on a conical seat of the cone carrier 4. The cone carrier 4 is set via the driven eccentric bushing 5 into a wobbling movement, as a result of which the crushing gap 6 between crushing ring 1 and crushing cone 3 changes in a continuously revolving manner. In the crushing gap 6, the material for crushing is comminuted by a squeezing and impact action until said material can leave the cone crusher through the crushing gap 6.

[0022] The driven eccentric bushing 5 rotates radially guided about a spindle 7 which is clamped fixedly in the housing lower part 8. For the axial supporting of the cone carrier 4, use is made of a spherical axial bearing 10 which is arranged on the head of a cylinder piston 9 and absorbs the wobbling movement of the cone carrier 4. The cylinder piston 9 is integrated in an end-side bore of the spindle 7 and permits the axial displacement of the cone carrier 4 with the crushing cone 3 sitting thereon, which leads to the setting of the width of the crushing gap 6. The cylinder piston 9 is supplied with hydraulic oil via oil lines 18 placed into the spindle 7.

[0023] The spindle 7 is of rotationally cylindrical design and is pushed into the corresponding spindle receptacle 11, which is provided in the housing lower part 8 and is designed as a bore, wherein a sufficiently large amount of play is provided between the spindle 7 and the spindle receptacle 11. For the purpose of bracing the spindle 7 within the spindle receptacle 11, said spindle has a cylindrical upper bearing portion 15 (FIG. 2) which is braced in the spindle receptacle by means of an upper mechanical clamping device in the form of a conical clamping set 14.1. The conical clamping set 14.1 is received here in an annular space 12 provided in the spindle receptacle 11.

[0024] In the present exemplary embodiment, the spindle 7 is additionally held via a second lower bracing means 14.2. For this purpose, said spindle has a cylindrical lower bearing portion 13 which is clamped in a lower region of the the spindle receptacle 11 by means of a corresponding lower mechanical clamping device in the form of a further conical clamping set 14.2 of smaller diameter. In this case, the annular space 16 which receives the clamping set 14.2 is taken out of the spindle. The fastening of the spindle 7 is therefore characterized in that the latter is clamped in the housing lower part 8 via two bending-torque-dependent, differently sized clamping sets 14.1 and 14.2 having a sufficiently large force engagement surface. The clamping sets 14.1 and 14.2 are fitted via the two annular spaces 12 and 16 into two constructional portions, which are provided for this purpose and are designed as cylindrical guides, between spindle and spindle receptacle.

[0025] As is apparent from the figures, the spindle 7 lies against a stop 17 which is formed by the spindle receptacle 11. For this purpose, between the upper bearing portion 15 and the lower bearing portion 13 a transition is provided from a small to a larger bore diameter and, in a corresponding manner on the spindle 7, a transition is provided from a larger to a small shaft diameter. This stop 17 in the axial direction defines the fitting depth of the spindle 7 in the spindle receptacle 11.

[0026] The clamping sets used in this embodiment each have three elements which are displaceable in relation to one another, wherein the required clamping force is set via corresponding screw assemblies. As is apparent, the upper clamping set 14.1 is oriented in such a manner that the conical inner ring 20 lying against the upper bearing portion 15 tapers downward toward the lower bearing portion 13. By contrast, the lower clamping set 14.2 is oriented in such a manner that the conical inner ring 19 lying against the lower bearing portion 13 tapers upward toward the upper bearing portion 15.

[0027] In the embodiment, use is made of commercially available clamping sets 14.1, 14.2 which each comprise a closed inner ring 20 and two closed pressure rings 21.1 and 21.2 lying one behind the other, wherein each of the pressure rings 21.1 and 21.2 is braced via a separate screw assembly 22. The upper clamping set 14.1 is oriented here in such a manner that the heads of the screws 22 are accessible from above when the eccentric bushing is removed, wherein the lower clamping set 14.2 can be braced by screws, the heads of which are accessible from below.

LIST OF REFERENCE SIGNS

[0028] 1 crushing ring [0029] 2 housing upper part [0030] 3 crushing cone [0031] 4 cone carrier [0032] 5 eccentric bushing [0033] 6 crushing gap [0034] 7 shaft [0035] 8 housing lower part [0036] 9. cylinder piston [0037] 10 axial bearing [0038] 11 spindle receptacle [0039] 12 annular space [0040] 13 lower bearing portion 1 [0041] 14 clamping sets (14.1 and 14.2) [0042] 15 upper bearing portion [0043] 16 annular space [0044] 17 stop [0045] 18 oil line [0046] 19 inner ring 19 [0047] 20 inner ring 20 [0048] 21 pressure rings (21.1 and 21.2) [0049] 22 screws