US3467322A - Base structure of gyratory cone crusher - Google Patents

Description

Sept. 16, 1969 A. A. LEVISHKO ETA!- 3,467,322

BASE STRUCTURE OF GYRATORY CONE CRUSBER Filed March 15, 1966 3 Sheets-Sheet 1 Sept. 16, 1969 LEVISHKQ ETAL 3,467,322

BASE STRUCTURE OF GYRATORY com: CRUSHER Filed March 15, 1966 3 Sheets-Sheet 2 p 16, 1969 A. A. LEVISHKO ETAL 3,467,322

BASE STRUCTURE OF GYRATORY CONE CRUSHER Filed March 15. 1966 3 Sheets-Sheet 3 United States Patent 3,467,322 BASE STRUCTURE OF GYRATORY CONE CRUSHER Anatoly Alexandrovich Levishko, Ulitsa Pobedy 45, kv.

18, Gennady Alexandrovich Kaljunov, Ulitsa Festivalnaya 23, kv. 4, and Evgeny Leontievich Goriu, Ulitsa Kultury 20, kv. 12, all of Sverdlovsk, U.S.S.R.

Filed Mar. 15, 1966, Ser. No. 534,335 Int. Cl. B02c 2/00 US. Cl. 241213 4 Claims ABSTRACT OF THE DISCLOSURE A bearing structure mounted in the bore of a frame hub for supporting the shaft of a crushing cone of a gyratory crusher. The bearing structure includes a jack, secured in the hub at the bottom of the bore, supporting the lower end of the shaft via an intermediate member slidably mounted in the bore and a thrust bearing on the intermediate member.

The present invention relates to gyratory cone crushers and, more particularly, it relates to the bearing structures of gyratory cone crushers supplied with a hydraulic adjustment of the discharge outlet.

There are known various types of gyratory cone crushers wherein the crushing cone shaft incorporated inside the crushing bowl rests upon a thrust bearing located in the central hub bore of the frame over the plunger of the hydraulic arrangement which is a part of the gyratory cone crusher frame.

Above the crushing cone, the shaft is supported by a sliding bearing arranged in a crosspiece.

The crushing cone shaft is set into a gyratory motion by a hollow eccentric located over the hydraulic arrangement.

The main disadvantages of the known types of cone crushers are:

Difliculties in manufacturing both the frame and the parts of the hydraulic arrangement provided therein;

Presence of flange connections requiring a high reliability of sealing; and

Necessity of disassembling the frame during repair and maintenance of the hydraulic arrangement.

In addition, there are known gyratory cone crushers wherein said hydraulic arrangement is partially located inside the crushing cone and partially in the central hub bore of the gyratory cone crusher. The disadvantages of these crushers are similar to those described above.

Other gyratory cone crushers are known at present, wherein the hydraulic arrangement is disposed inside the crosspiece of the cone crusher.

The main disadvantages which are inherent in the type of crushers described above are as follows:

Difliculties in manufacturing the crosspiece and parts of the hydraulic arrangement disposed therein;

Presence of flange connections requiring a high reliability of sealing.

It is therefore an object of the present invention to provide a gyratory cone crusher with a hydraulic control of the discharge outlet wherein said hydraulic arrangement is comparatively simple in design and will not be a part of either the frame or the crosspiece.

Another object of the invention is to provide a cone crusher wherein the hydraulic arrangement is free of any flange connections requiring a high reliability of sealing.

Still another object of the invention is to provide a cone crusher wherein the frame hub is relieved from concentrated forces transferred by the crushing cone shaft.

A further object of the invention is to provide a cone lce crusher wherein both the repair and maintenance of the hydraulic arrangement and other parts incorporated in the frame hub bore are performed in a comparatively simple way.

In accordance with the aforesaid and other objects, the present invention comprises a new arrangement and a combination of parts and elements thereof, as described here and below and claimed in the appended claims. Various modifications in the exact embodiment of the invention as disclosed herein may be made without departing from the spirit and scope of the invention as described in the appended claims.

Other objects and advantages of the invention will become clear from the following description of the in vention with reference to the accompanying drawing, in which:

FIG. 1 is a longitudinal section of the crusher;

FIG. 2 is a variant of the frame hub with a detachable bottom;

FIG. 3 is a variant of the frame hub with a detachable lower part.

In all the figures of the drawing similar symbols refer to similar parts.

The gyratory cone crusher (FIG. 1) comprises a vertical shaft 1 with a rigidly fitted crushing cone 2 thereon positioned in a crushing bowl 3, the shaft 1 resting at its lower end on a thrust bearing 4, which is mounted in hub 5 of a frame 6.

At its top part the shaft 1 is supported by a sliding bearing 7 provided inside a crosspiece 8.

The shaft 1 is mounted at its lower portion in a hollow eccentric 9 located in the hub 5 above the thrust bearing 4 and rigidly connected to a bevel gear 10 meshed with a bevel gear 11 of a driving shaft of a power drive.

The thrust bearing 4 is mounted on an intermediate member 12 in the shape of a sleeve and positioned in the lower part of the hub 5 and supported by a hydraulic jack 13.

The jack 13 is positioned in an opening in the bottom of the hub 5, a spherical step bearing 14 being located between the intermediate member 12 and the hydraulic jack.

The member 12 in the hub 5 is restrained against rotation and from falling out of the hub (in case the lower part of the hub is of a detachable type) by means of a locking rod 15.

With the help of the jack 13, the shaft 1 of the crushing cone can move vertically in the course of both the adjustment of the cone crusher and the regulation of the size of the discharge outlet during operation.

The impacts arising during operation of the crusher are transferred by the lower part of the shaft 1 to the inner part of the hub 5 through the thrust bearing 4 and the side surface of the member 12.

Due to even distribution of load throughout the bottom part of the intermediate member 12 and its considerable side surface, the specific pressure on the inner surface of the hub 5 is comparatively small and the piston of the hydraulic jack 13 is subjected to axial force only.

Such a distribution of load provides for a reliable operation of the cone crusher.

The jack 13 is a comparatively simple arrangement and is constituted by a cylinder with a piston therein, the cylinder being inserted in the opening in the bottom of hub 5 and resting thereon by means of external flanges which are provided on the cylinder.

This makes it possible to remove the jack by passing it upwards through the housing of the cone crusher. In the event that the hub 5 has a detachable lower portion, as shown in FIGS. 2 and 3 it becomes possible to remove the jack out downwards. Such a design simplifies the employment of the cone crusher to a great extent.

Though the present invention has been described in accordance with its preferred embodiment it is apparent that modifications may be efiected without departing from the spirit and scope of the invention as those skilled in the art will easily understand.

These modifications and variants are considered to be within the spirit and the scope of the invention as defined by the appended claims.

What is claimed is 1. A gyratory crusher comprising an upright shaft, a crushing cone mounted on said shaft, a crushing bowl surrounding said cone, a frame rigidly connected to said bowl and including a central hub with a bore, and a bearing structure in said bore for said shaft, said bearing structure including: a hydraulic jack secured in said hub at the bottom of said bore for adjusting the clearance between the said cone and bowl, an intermediate member supported on said hydraulic jack and slidably mounted in the bore of said hub, and a thrust bearing for said shaft mounted on said intermediate member below said shaft.

2. A gyratory crusher as claimed in claim 1, wherein said bearing structure further comprises a spherical step bearing interposed between the hydraulic jack and said intermediate member.

3. A gyratory crusher as claimed in claim 1, wherein the hydraulic jack is constructed as a separate unit including a cylinder having an outer flange, said hydraulic jack being inserted in an aperture provided in the bottom of the hub and resting on said bottom with said flange.

4. A gyratory crusher as claimed in claim 1, wherein said intermediate member is constituted as a sleeve axially arranged in the bore of the hub and having a substantial surface in contact with the hub.

References Cited UNITED STATES PATENTS 229,477 6/1880 Schmerber 241245 2,908,448 10/ 1959 MacLeod 241213 3,133,707 5/1964 Zimmerman 241213 3,328,888 7/1967 Gieschen 24l--213 FOREIGN PATENTS 133,376 10/1951 Sweden. Y

672,080 10/1963 Canada.

ROBERT C. RIORDON, Primary Examiner D. G. KELLY, Assistant Examiner

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