US2699900A

US2699900A - Gyratory crusher

Info

Publication number: US2699900A
Application number: US357848A
Authority: US
Inventors: Jr Samuel W Traylor
Original assignee: Individual
Current assignee: Individual
Priority date: 1953-05-27
Filing date: 1953-05-27
Publication date: 1955-01-18
Anticipated expiration: 1972-01-18

Description

Jan. 18, 1955 s, w TRAYLOR, JR 2,699,900

GYRATORY CRUSHER Filed May 27, 1953 2 Sheets-Sheet l INVENTOR MUELWTRAYLORJJR BY HIS ATTORNEYS Jan. 18, 1955 s w TRAYLQR, JR 2,699,900

GYRATORY CRUSHER Filed May 27, 1955 2 Sheets-Sheet 2 ////////////n/J/V INVENTOR SAMUEL W. TRAYLOR,JR.

BY H IS ATTORNEYS 2 hwm1/ /vwwr/ United States Patentf) GYRATORY CRUSHER Samuel W. Traylor, Jr., Allentown, Pa.

Application May 27, 1953, Serial No. 357,848

12 Claims. (Cl. 241-209) The present invention relates to new and useful improvements in gyratory crushers and more particularly to novel tilting mechanism for a gyratory crusher which will permit the crushing head to tilt upwardly about a fulcrum without appreciably changing the lateral position of the bearing support at the upper end of the crushing shaft. I

Prior to the present invention in gyratory crushers of this type wherein a spider or similar support for the upper gyrating shaft bearing is carried by the tilting frame which supports the concave or head mantle, upward tilting of the concave due to non-crushable material entering the crusher caused the upper shaft bearing to be moved laterally of the crusher a substantial distance. This lateral movement of the upper shaft bearing, in turn, tilted the crushing shaft a substantial amount thereby necessitating the use of a universal connection between the crushing shaft and the drive mechanism for the crushing shaft substantially increasing the cost of the crusher. In an effort to overcome this defect of prior crushers, separate frame members have been provided, either secured to an overhead support or mounted on the main frame of the crushing machine, to support the upper crushing shaftbearingand prevent lateral movement of this bearing upon upward tilting of the concave. This construction also considerably increased the cost and weight of prior crushing machines of this type.

With the foregoingin mind, the principal object of the present invention is to provide novel tilting mechanism for gyratory crushers which will permit the concave to tilt upwardly about a fulcrum without appreciably changing the lateral position of the bearing support for the upper end of the crushing shaft.

Another object of the present invention is to provide novel tilting mechanism for gyratory crushers in which a spider or similar support member is carried by the tilting or movable frame and supports the upper tilting shaft bearing at a position in substantially the same plane as the fulcrum of the movable frame so that tilting movemenfof the frame will not change the lateral position of the bearing support.

A further object of the present invention is to provide a novel gyratory crusher wherein the concave may be adjusted with respect to the crushing head without changing the position of the upper shaft hearing.

A still further object of the present invention is to provide a novel gyratory crusher and tilting mechanism having the features and characteristics set forth which is of relatively simplified construction and entirely elficient and effective in operation and use.

These and other objects of the present invention and the various features and details of the operation and construction thereof are hereinafter more fully set forth and described with reference to the accompanying drawings in which: V

Fig. 1 is a longitudinal sectional view of a gyratory crusher provided with tilting mechanism made in accordance with the present invention;

Fig. 2 is an enlarged fragmentary longitudinal sectional view of the crusher illustrated in Fig. 1 with the concave in its tilted or elevated position;

Fig. 3 is a fragmentary plan view taken on line 33,

Fig. 1 illustrating the means for adjusting the relative vertical position of the concave;

Fig. 4 is an enlarged sectional view of the upper end 2,699,900 Patented Jan. 18, 1955 of the gyrating shaft and the supporting bearing in their normal operating position; and

Fig. 5 is a sectional view similar to Fig. 4 illustrating the relative position of the bearing with respect to the shaft when the concave has been tilted upwardly.

Referring more specifically to the drawings and particularly Fig. 1 thereof, reference numeral 10 designates generally a main frame member comprising inner and outer generally

concentric frame portions

11 and 12, respectively, interconnected by a plurality of ribs 13. The outer frame portion 12 has an outwardly extending peripheral flange 14 thereon provided with an annular V shaped groove 15 in the upper surface thereof which receives a correspondingly shaped downwardly extending flange formed integrally with a movable frame. portion 16. The movable frame portion 16 is resiliently secured to the main frame by means of a plurality of adjusting bolts 17 which extend downwardly through the movable frame and main frame and hold a corre-, sponding plurality of compression springs 18 captive between the lower surface of the flange 14 and a ring 19 carried by the bolts 17.

Extending upwardly through the inner frame portion 11 is a main shaft 21 for the crusher which carries a crushing head 22 equipped with a hardened head mantle or crushing surface 23 formed of manganese steel or similar material. The lower end of the main shaft is journaled in an eccentric 24 which, when rotated, causes the shaft 21 to gyrate about the central axis of the crusher. The longitudinal axis of the eccentric is offset from the longitudinal axis of the crushing machine and is disposed at an angle thereto so that rotary movement or the eccentric causes the crushing shaft to gyrate about the central axis of the crusher. The eccentric 24 may be rotated in the conventional manner from a drive wheel exteriorly of the crusher, for example, by means of a pair of bevel gears as shown in Fig. 1 while the weight of the crushing shaft 21 and crushing head 22 is supported by a step bearing 25.

Positioned upwardly adjacent the crushing head 23 concentric with the central axis of the crusher is a concave 26 which is supported by a crushing ring 27., The crushing ring 27 is threaded on its exterior surface, as indicated at 28, and engages similar threads 31 formed on the inner surface of the movable frame portion 16. By this construction, the tilting frame 16 adjustably mounts the concave 26 and crushing ring 27 so that the relative distance between the concave and crushing head may be varied to control the size of the final product produced by the crusher.

In accordance with the present invention, the upper end of the main shaft 21 is received in a relatively loose fitting tapered bushing or bearing 32 having upwardly and outwardly diverging side wall portions, as shown in Figs. 4 and 5. During normal operation of the crusher, the side edge of the shaft 21 is parallel to the portion of the side wall of the bushing 32 at the point where the shaft engages the bushing so that the shaft 21 rotates in the bushing and engages the bushing with a line contact. The bushing 32 in turn is carried by a spider 33 which is supported by the movable frame portion 16. The spider 33 consists of inner and outer

concentric ring portions

34 and 35, respectively, interconnected by a plurality of webs 36. The peripheral edge of the outer ring portion 35 is tapered, as indicated at 37, and is received in a correspondingly tapered portion 38 at the upper end of the movable frame 16.

In addition, the spider is interconnected with the crushing ring 27 to prevent upward displacement of the spider with respect to the movable frame portion 16. In the present instance, this is accomplished by providing a plurality of bolts 41 which extend downwardly through the.

3 movable frame portion 16. However, the crushing ring 27 may be adjusted with respect to the movable frame portion 16 by loosening the bolts 41, rotating the spider and crushing ring, for example, by means of conventional ratchet mechanism designated generally as 44 in Figs. 1 and 3, and then again tightening the bolts 41.

An important feature of the present invention is the mounting of the bushing 32 in such a position that upward tilting of the movable frame portion 16 due to noncrushable material entering the crusher and being jammed between the concave 26 and head mantle 23, will not cause the bushing 32 to be moved laterally of the crusher an appreciable distance. With reference to Fig. 2 if a piece of crushable material enters the crusher, for example as indicated at 45, the concave 26 will be displaced upwardly with respect to the crushing head against the pressure of the springs 18 causing the movable frame portion 16 to tilt upwardly about the point P. Lateral movement of the bushing 32 during this upward movement of the tilting frame portion 16 would cause a considerable strain to be exerted on the crushing shaft 21 since the shaft is mounted in a fixed position with respect to the eccentric 24. To prevent this, the bushing 32 is supported in a position which is substantially in the same horizontal plane as the point P, or plane of the fulcrum for the tilting frame, about which the tilting frame portion pivots, and thus the inner ring portion 34- .of the spider is disposed in a position substantially lower than the position of the outer ring portion 35. By this construction, upward tilting movement of the movable frame portion will cause the bushing 32 to be moved substantially vertically upward along the arc of a circle having its center at a point P, for example, as shown in Fig. 2, and accordingly, the bushing 32 will be moved from the position which it usually assumes with respect to the shaft 21, as shown in Fig. 4, to an upper position in which the axis of the bushing is substantially concentric with the axis of the shaft 21, as shown in Fig. 5. The bushing 32 has a relatively loose fit on the shaft, and thus will not bind or exert any undue pressure on the shaft. While the bushing is in this elevated position, the shaft 21 will contact the inner lower periphery of the bushing instead of a portion of the side wall thereof.

To operate the crusher of the present invention, the material to be crushed is deposited in the usual manner on a conventional feed plate 46 supported on top of the crushing shaft 21 which wobbles or tilts with gyratory motion of the shaft and thus drops the material deposited thereon between the crushing head and the concave. During the gyratory motion of the shaft, any one portion of I the head mantle continually moves closer to the concave and then away from the concave to first crush the material between the concave and the head mantle and then permit the material to drop through the crusher, If a piece of non-crushable material is deposited in the crusher, the movable frame portion of the crusher will be displaced upwardly as this non-crushable material is caught between the head mantle and the concave to prevent any undue strain on the shaft 21, the crushing head or the concave, and further rotation of the shaft 21 will permit the non-crushable material to pass through the crusher without damage to the crusher.

From the foregoing it will be observed that the present invention provides novel tilting mechanism for gyratory crushers which will permit the concave and supporting structure for the concave to tilt upwardly when noncrushable material enters the crusher without appreciably changing the lateral position of the bushing which supports the upper end of the crushing shaft so that the crushing shaft is maintained in its desired position at all times. In addition, it will be observed that the present invention provides a novel crusher wherein the relative position of the concave with respect to the crushing head may be adjusted without changing the position of the bushing supporting the upper end of the crushing shaft.

While a particular embodiment of the present invention has been illustrated and described herein, it is not intended to limit the invention to such a disclosure and changes and modifications may be incorporated and embodied therein within the scope of the following claims.

I claim:

1. In a gyratory crusher comprising a stationary main frame member, a tilting frame portion supported by said main frame and tiltable upwardly relative to the main frame about a fulcrum surface thereon, a crushing shaft mounted in said main frame for gyratory movement thereima crushing head carried by said shaft, a concave carried by said tilting frame and disposed for cooperation with said crushing head, a bearing support fixedly mounted in said tilting frame and tiltable therewith, and a bearing member carried by said support rotationally supporting the upper end of said crushing shaft substantially in the plane of the fulcrum surface on the main frame so that lateral displacement of the crushing shaft upon upward tilting movement of the tilting frame and bearing support is substantially eliminated.

2. In a gyratory crusher comprising a stationary main frame member, a tilting frame portion supported by said main frame and tiltable upwardly relative to the main frame about a fulcrum surface thereon, a crushing shaft mounted in said main frame for gyratory movement therein, a crushing head carried by said shaft, a concave carried by said tilting frame and disposed for cooperation with said crushing head, a bearing support fixedly mounted in said tilting frame and tiltable therewith, and a hearing member carried by said support rotationally supporting the upper end of said crusher shaft substantially in the plane of the fulcrum surface on the main frame whereby upon upward pivotal movement of the tilting frame about said fulcrum, said bearing is moved upwardly in a substantially vertical path.

3. In a gyratory crusher comprising a stationary main frame member having an annular groove about the periphery of its upper surface, a tilting frame portion supported by said main frame, said tilting frame portion having a downwardly extending flange thereon engaged in the annular groove of said main frame and tiltable upwardly relative to the main frame about a fulcrum surface in said annular groove, a crushing shaft mounted in said main frame for gyratory movement therein, a crushing head carried by said shaft, a concave carried by said tilting frame and disposed for cooperation with said crushing head, a bearing support fixedly mounted in said tilting frame and tiltable therewith, a bearing member carried by said support rotationally supporting the upper end of said crushing shaft substantially in the plane of the fulcrum surface on the main frame whereby upon upward pivotal movement of the tilting frame about said fulcrum, said bearing is moved upwardly in a substantially vertical path.

4. In a gyratory crusher operable to crush material to a predetermined size comprising a stationary main frame member, a tilting frame portion supported by said main frame and tiltable upwardly relative to the main frame about a fulcrum surface thereon, a crushing shaft mounted in said main frame for gyratory movement therein, a crushing head. carried by said shaft, a crushing ring secured to said tilting frame portion for relative adjustable movement vertically with respect to said tilting frame, a concave carried by said crushing ring and disposed for cooperation with said crushing head, said concave being movable vertically upon adjusting movement of said crushing ring to control the size of the crushed material, a bearing support fixedly mounted in said tilting frame and tiltable therewith, a bearing member carried by said support rotationally supporting the, upper end of said crushing shaft substantially in the plane of the fulcrum surface on the main frame whereby upon upward pivotal movement of the tilting frame about said fulcrum, said bearing is moved upwardly in a substantially vertical path.

5. In a gyratory crusher comprising a stationary main frame member having an annular groove about the periphery of its upper surface, a tilting frame portion supported by said main frame, said tilting frame portion having a downwardly extending flange thereon engaged in the annular groove of said main frame and tiltable upwardly relative to the main frame about a fulcrum surface in said annular groove, a crushing head carried by said shaft, a crushing ring carried by said tilting frame for relative adjustable movement vertically with respect to said tilting frame, a concave fixedly secured to said crushing ring and disposed for cooperation with said crushing head, said concave being movable with said crushing ring vertically upon adjusting movement thereof to control the size of the crushed material, spring means positioned about the periphery of said main frame resiliently urging said tilting frame downwardly into engagement with said frame, a bearing support fixedly mounted in said tilting frame and tiltable therewith, and a bearing member carried by said support rotationally supporting the upper end of said crushing shaft substantially in the plane of i the fulcrum surface on the main frame whereby upon upward pivotal movement of the tilting frame about said fulcrum, said bearing is moved upwardly in a substantially vertical path.

6. In a gyratory crusher comprising a stationary mam frame member, a tilting frame portion supported by said main frame and tiltable upwardly relative to the main frame about a fulcrum surface thereon, a crushing shaft mounted in said main frame for gyratory movement therein, a crushing head. carried by said shaft, a concave fixedly secured to said crushing ring and disposed for cooperation with said crushing head, a bearing support carried by said tilting frame and tiltable therewith, means interconnecting said bearing support with said concave to maintain said bearing support in engagement with said tilting frame, and a bushing carried by said support rotationally supporting the upper end of said crushing shaft substantially in the plane of the fulcrum surface on the main frame whereby upon upwardly pivotal movement of the tilting frame about said fulcrum surface said bearing is moved upwardly in a substantially vertical path.

7. In a gyratory crusher operable to crush material to a predetermined size comprising a stationary main frame member, a tilting frame portion supported by said main frame and tiltable upwardly relative to the main frame about a fulcrum surface thereon, a crushing shaft mounted in said main frame for gyratory movement therein, a crushing head carried by said shaft, a crushing ring mounted interiorly of said tilting frame for relative adjustable movement vertically with respect to said tilting frame, a concave fixedly secured to said crushing ring and disposed for cooperation with said crushing head, said concave being movable vertically upon adjusting movement of said crushing ring to control the size of the crushed material, a bearing support fixedly mounted in said tilting frame and tiltable therewith, means interconnecting said bearing support with said crushing ring to maintain said bearing support in engagement with said tilting frame, and a bushing carried by said support rotationally supporting the upper end of said crushing shaft substantially in the plane of the fulcrum surface on the main frame whereby upon upwardly pivotal movement of the tilting frame about said fulcrum surface said bearing is moved upwardly in a substantially vertical path.

8. In a gyratory crusher operable to crush material to a predetermined size comprising a stationary main frame member having an annular groove about the periphery of its upper surface, a tilting frame portion supported by said main frame, said tilting frame having a downwardly extending flange thereon engaged in the annular groove of said main frame and tiltable upwardly relative to the main frame about a fulcrum surface in said annular groove, means resiliently urging said tilting frame downwardly into engagement with said main frame, a crushing shaft mounted in said main frame for gyratory movement therein, a crushing head carried by said shaft, a crushing ring mounted interiorly of said tilting frame for relative adjustable movement vertically with respect to said tilting frame, a concave fixedly secured to said crushing ring and disposed for cooperation with said crushing head, said concave being movable vertically upon adjusting movement of said crushing ring to control the size of the crushed material, a bearing support fixedly mounted in said tilting frame and tiltable therewith, means interconnecting said bearing support with said crushing ring to maintain said bearing support in engagement with said tilting frame, and a bushing carried by said support rotationally supporting the upper end of said crushing shaft substantially in the plane of the fulcrum surface on the main frame whereby upon upwardly pivotal movement of the tilting frame about said fulcrum surface said bearing is moved upwardly in a substantially vertical path.

9. In a gyratory crusher operable to crush material to a predetermined size comprising a stationary main frame member having an annular groove about the periphery of its upper surface, a tilting frame portion supported by said main frame, said tilting frame having a downwardly extending flange thereon engaged in the annular groove of said main frame and tiltable upwardly relative to the main frame about a fulcrum surface in said annular groove, means resiliently urging said tilting frame downwardly into engagement with said main frame, a crushing shaft mounted in said main frame for gyratory movement therein, a crushing head carried by said shaft, a crushing ring mounted interiorly of said tilting frame in threaded engagement therewith for relative adjustable movement vertically with respect to said tilting frame, a concave fixedly secured to said crushing ring and disposed for cooperation with said crushlng head, said concave being movable vertically upon adjusting movement of said crushing ring to control the size of the crushed material, a bearing support fixedly mounted in said tilting frame and tiltable therewith, means interconnecting said bearing support with said crushing ring to maintain said bearing support in engagement with said tilting frame, and a bushing carried by said support rotationally supporting the upper end of said crushing shaft.

10. In a gyratory crusher operable to crush material to a predetermined size comprising a stationary main frame member having an annular groove about the periphery of its upper surface, a tilting frame portion supported by said main frame, said tilting frame having a downwardly extending flange thereon engaged in the annular groove of said main frame and tiltable upwardly relative to the main frame about a fulcrum surface in said annular groove, spring means positioned about the periphery of said main frame resiliently urging said tilting frame downwardly into engagement with said main frame, a crushing shaft mounted in said main frame for gyratory movement therein, a crushing head carried by said shaft, a crushing ring mounted interiorly of said tilting frame in threaded engagement therewith for relative adjustable movement vertically with respect to said tilting frame, a concave fixedly secured to said crushing ring and disposed for cooperation with said crushing head, said concave being movable vertically upon adjusting movement of said crushing ring to control the size of the crushed material, a bearing support fixedly mounted in said tilting frame and tiltable therewith, means interconnecting said bearing support with said crushing ring to maintain said bearing support in engagement with said tilting frame, and an upwardly diverging tapered bushing carried by said support rotationally supporting the upper end of said crushing shaft substantially in the plane of the fulcrum surface on the main frame whereby upon upwardly pivotal movement of the tilting frame about said fulcrum surface said bearing is moved upwardly in a substantially vertical path so that lateral displacement of the crushing shaft is substantially eliminated.

11. In a gyratory crusher operable to crush material to a predetermined size comprising a stationary main frame member, a tilting frame portion supported by said main frame and tiltable upwardly relative to the main frame about a fulcrum surface thereon, said tilting frame having a circumferential flange on the upper surface thereof tapered upwardly and outwardly of the tilting frame, a crushing shaft mounted in said main frame for gyratory movement therein, a crushing head carried by said shaft, a crushing ring mounted interiorly of said tilting frame in threaded engagement therewith for relative adjustable movement vertically with respect to said tilting frame, a concave fixedly secured to the crushing ring and disposed for cooperation with the crushing head, said concave being movable vertically upon adjusting movement of said crushing ring to control the size of the crushed material, a bearing support carried by said tilting frame and tiltable therewith, said bearing support having its outer peripheral surface tapered to correspond to the tapered flange of said tilt ing frame, and a plurality of bolts interconnecting said bearing support and said crushing ring operable to pull the bearing support downwardly into engagement with the tapered flange and the crushing ring upwardly into engagement with the tilting frame threads.

12. In a gyratory crusher operable to crush material to a predetermined size comprising a stationary main frame member, a tilting frame portion supported by said main frame and tiltable upwardly relative to the main frame about a fulcrum surface thereon, said tilting frame having a circumferential flange on the upper surface thereof tapered upwardly and outwardly of the tilting frame, a crushing shaft mounted in said main frame for gyratory movement therein, a crushing head carried by said shaft, a crushing ring mounted interiorly of said tilting frame in threaded engagement therewith for relative adjustable, movement vertically with respect to said tiltin f me, s i thr aded, engagement cem- Pris g hreads on the tilting fr me having heir. lower surfaces beveled downwardly and outwardly of the tilting frame and threads on the crushing ring having their upper surfaces beveled to correspond with the bevel of the tilting frame threads, a concave fixedly secured to the crushing ring and disposed for cooperation with the crushing head, said concave being movable vertically upon adjusting movement of said crushing ring to control the size of the crushed material, a bearing support carried by said tilting frame and tiltable therewith, said bearing support having its outer peripheral surface tapered to correspond to the tapered flange of said tilting frame, a plurality of bolts extending through said bearing support and threaded into said crushing ring operable to pull the bearing support downwardly into en agement withthe tapered flange and the crushing ring upwardly into engagement with the beveled surfaces on the tilting frame threads, and an upwardly diverging tapered bushing carried by said support rotationally supporting the upper end of said crushing shaft substantially in the plane of the fulcrum surface on the main frame whereby upon upwardly pivotal movement of the tilting frame about. said fulcrum surface bearing is moved upwardly in a substantially vertical path so that. lateral displacement of the crushing shaft is substantially eliminated.

No references cited.