US3302896A

US3302896A - Frame for gyratory crushers

Info

Publication number: US3302896A
Application number: US358265A
Authority: US
Inventors: Balmer Hansjorg; Rudolph J Gasparac
Original assignee: Nordberg Manufacturing Co
Current assignee: Nordberg Manufacturing Co
Priority date: 1961-11-14
Filing date: 1964-04-08
Publication date: 1967-02-07
Anticipated expiration: 1984-02-07

Description

Feb. 7, 1967 H. BALMEIR ETAL 3,302,896

FRAME FOR GYRATORY CRUSHERS Original Filed Nov. 14, 1961 5 Sheets-Sheet l H. BALMER ETAL FRAME FOR GYRATORY CRUSHERS Feb. 7, 1967 3 Sheets-Sheet Original Filed Nov. 14,

z m j OMW WMV may M N /K 61w 5 r m a wM M a xww H. BALMER ETAL FRAME FOR GYRATORY CRUSHERS Feb. 7, 1967 5 Sheets-Sheet 3 Original Filed Nov. 14, 1961 United States Patent 3,302,896 FRAME FUR GYRATORY CRUSHERS Hansjorg lialmer, Langenthal, Bern, Switzerland, and Rudolph .l. Gasparac, Milwaukee, Wis., assignors to Nordberg Manufacturing Company, Milwaukee, Wis, a corporation of Wisconsin Original application Nov. 14, 1961, Ser. No. 152,222, now Patent No. 3,140,835, dated July 14, 1965. Divided and this application Apr. 8, 1964, Ser. No. 358,265 3 Claims. (Cl. 241-285) This is a division of US. Patent No. 3,140,835, issued July 14, 1964.

This invention is in the field of material reduction machines and is concerned, among other things, with an improved gyratory crusher.

A primary object of the invention is an improved gyratory crusher which is efficient in use.

Other objects will appear from time to time in the ensuing specification and drawings in which:

FIGURE 1 is a vertical section of a gyratory crusher;

FIGURE 2 is an enlarged view of a portion of FIGURE 1; and

FIGURE 3 is a top plan view, partly in section, of the frame and drive.

In FIGURE 1, a crusher has been shown generally in cluding the following main parts, a main frame A which supports a bowl structure B releasably held on the main frame by a release mechanism C and arranged to be adjusted by an adjustment mechanism D. The main frame also sup-ports a crushing head E defining a crushing cavity with the bowl.

The main frame A includes a base flange with an upstanding housing 12 and a supporting flange 14 for the bowl structure at the upper end. The base flange is connected to a center hub 16 by a web structure 18. The center hub supports an eccentric 20 which has a suitable counterweight 22 at its upper end overhanging the upper end of the center hub and connected to a ring gear 23 by bolts 24 or the like, which in turn is driven by a pinion 25 on a drive shaft 26 which in turn may be driven by a belt and pulley arrangement or any suitable means, not shown.

The drive shaft may be supported by bearings 27 in a sleeve 28 suitably held in a boss or journal 29 which is a part of the frame with a pulley 30 or the like at the outer end of the shaft.

The lower end of the center hub is closed by a bottom cap 32 which houses a thrust bearing arrangement 34 of any suitable type supporting the eccentric. The hub may have a suitable lubricant inlet connection, as at 36, with outlets at 37, and a suitable bearing sleeve 38 may line the center hub around the eccentric removably held in by bolts 39 or the like, in FIGURE 2. The webs around the center hub may be closed on top by a detachable annular support 40 which defines a socket 42 lined with a brass or bronze seat or liner 44 on its upper surface and described about a center of gyration X, for supporting the head. The support itself may be remova bly held on the main frame by bolts 46 or the like.

The main frame 12 may have the web structure 18 to the center hub 16 formed in cross section in a U, an H shape, or in a box or rod shape, as at 48 in FIGURE 3. It is preferred to use three such webs or arms. One of the arms 48 supports the drive shaft and sleeve, as shown in FIGURE 3, and the webs flare at 50 inside of the supporting ledge 51. The webs, center hub and supporting ledge thus form an upwardly opening pocket 52 so that when the head support 40 is removed, the drive pinion 25 may be inserted from above. To assemble the drive, the sleeve 28 with bearings and drive shaft are inserted through the arm 48. The drive pinion 25 is lowered into the pocket and the end 54 of the drive shaft is inserted into the pinion while the pinionis suspended in the pocket. Then the pinion may 'be connected to the end of the drive shaft by suitable bolts 56 orthe like which pull the pinion up on a tapered bushing or sleeve 57. Thus the inside of the arm 48 may have a much smaller dimension than the pinion. Further the forces applied to the drive shaft are absorbed in the arm of the frame. The drive pinion may be readily removable, if removal is desired.

It will be realized that whereas a practical and operative device has been described and claimed, nevertheless many changes may be made in the size, shape, number and disposition and relation of parts without departing from the spirit of the invention. It is therefore wished that the description and drawings be taken as in a broad sense illustrative or diagrammatic rather than as limiting to the precise showing.

The use, operation and function of the invention are as follows:

In prior crushers, the countershaft, such as at 26 in the present application, has been inserted through a :box type structure in the frame of the crusher, note for example Patent No. 2,860,837, issued November 18, 1958. The opening in the frame has previously been made large enough to accept the pinion, as at 25 in FIGURE 1. This has the disadvantage of requiring an excessively large opening in the crusher and reduced strength in the frame.

In the present invention, the drive to the head is the countershaft in a box which joins the outer housing of the main frame and the center support for the head. The inside dimension of the box does not have to be large enough to allow the pinion to be inserted, since the pinion is dropped down into the pocket in the main frame from above and the countershaft is then connected to the pinion. This allows the drive to come in through one of the arms between the outer housing and the center support. This has the advantage that the high torques and stresses from the drive are supported directly by one of the frame arms. In effect, the countershaft is supported in a structure of maximum strength.

We claim:

1. In a gyratory crusher, a circumferential main frame, a generally upright center hub therein connected to the main frame by at least three radially disposed webs, the hub being constructed to center and support a crushing head for gyration in the frame, and a drive to the head including a rotatably mounted drive shaft to transmit the drive to the head, a boss formed in one of the radially disposed webs for enclosing and supporting the drive shaft, a pinion removably mounted on the inner end of the shaft of a diameter greater than the inside of the boss, and an upwardly opening pocket in the webs at the inner end of the boss such that, during assembly, the pinion may be lowered into the pocket and connected to the shaft when it is inserted through the boss.

2. In a gyratory crusher, a circumferential main frame, a generally upright center hub therein, a plurality of generally radially disposed arms connecting the center hub to the main frame, the hub being constructed to center and support a crushing head for gyration in the frame, and a drive to the head including a drive shaft rotatably mounted in one of the arms to transmit the drive to the head, a pinion removably mountable on the inner head of the shaft, such pinion having an exterior diameter greater than the inside diameter of the arm in which the shaft is mounted, the arms being formed and adapted to permit the pinion to be positioned in alignment with the shaft when the shaft is inserted through the arm.

3. In a gyratory crusher, a circumferential main frame, a generally upright center hub therein, a plurality of arms connecting the center hub to the main frame, the hub 3 4 being constructed to center and support a crushing head References Cited by the Examiner for gyration in the frame, and a drive to the head includ- UNITED STATES PATENTS ing a drive shaft rotatably mounted in one of the arms 961,084 6/1910 De Wein 241208 to transmit and drive the head, a pinion removably mountable on the inner head of the shaft, such pinion having 5 FOREIGN PATENTS an exterior diameter greater than the inside diameter of 770,261 3/1957 Great Britain,

the arm in which the shaft :is mounted, and means for connecting the pinion to the inner end of the shaft after WILLIAM R, JR., Primary Exammer.

the shaft is in place in the arm. H. F. PEPPER, Assistant Examiner.

Claims

1. IN A GYRATORY CRUSHER, A CIRCUMFRENTIAL MAIN FRAME, A GENERALLY UPRIGHT CENTER HUB THEREIN CONNECTED TO THE MAIN FRAME BY AT LEAST THREE RADIALLY DISPOSED WEBS, THE HUB BEING CONSTRUCTED TO CENTER AND SUPPORT A CRUSHING HEAD FOR GYRATION IN THE FRAME, AND A DRIVE TO THE HEAD INCLUDING A ROTATABLY MOUNTED DRIVE SHAFT TO TRANSMIT THE DRIVE TO THE HEAD, A BOSS FORMED IN ONE OF THE RADIALLY DISPOSED WEBS FOR ENCLOSING AND SUPPORTING THE DRIVE SHAFT, A PINION REMOVABLY MOUNTED ON THE INNER END OF THE SHAFT OF A DIAMETER GREATER THAN THE INSIDE OF THE BOSS, AND AN UPWARDLY OPENING POCKET IN THE WEBS AT THE INNER END OF THE BOSS SUCH THAT, DURING ASSEMBLY, THE PINION MAY BE LOWERED INTO THE POCKET AND CONNECTED TO THE SHAFT WHEN IT IS INSERTED THROUGH THE BOSS.