US3281083A

US3281083A - Rock crusher bowl support

Info

Publication number: US3281083A
Application number: US485460A
Authority: US
Inventors: Louis W Johnson
Original assignee: Individual
Current assignee: Cedarapids Inc
Priority date: 1963-11-12
Filing date: 1965-09-07
Publication date: 1966-10-25
Anticipated expiration: 1983-10-25

Description

Oct. 25, 1966 L. w. JOHNSON 3,281,083

ROCK CRUSHER BOWL SUPPORT Original Filed Nov. 12, 1963 2 Sheets-Sheet 1 Fig. 2 5/ 76' 62 LOU/5 W JOHNSON INVENTOR.

B) 5 4/ BUG/(HORN, BLOl-PE, KLAROU/ST 8 SPAR/(MN ATTORNEYS 7 Oct. 25, 1966 w. JOHNSON 3,281,083

ROCK GRUSHER BOWL SUPPORT Original Filed Nov. 12, 1963 2 Sheets-Sheet 2 LOU/5 W JOHNSON lA/VEA/TOR. F 19. 5 5r BUG/(HORN, BLORE, KLAROU/ST a SPAR/(MM ATTORNEYS United States Patent 3,281,083 ROCK CRUSHER BOWL SUPPORT Louis W. Johnson, 3440 Franklin Blvd., Eugene, Oreg. Original application Nov. 12, 1963, Ser. No. 322,673. Divided and this application Sept. 7, 1965, Ser. No. 485,460

Claims. (Cl. 241208) This invention relates to improvements in rock crushers and particularly to improvements in the bowl support arrangernent therefor. This application is copending with, and a division of, my prior application entitled Rock Crusher, Serial No. 322,673, filed November 12, 1963.

It is common practice in rock crushers to provide a bowl of manganese steel. A problem is presented how to support the bowl in spaced overlying relationship to the rotary head of the crusher and in underlying relation to the bonnet of the crusher.

It is a main object of the present invention to provide a novel arrangement for supporting the bowl from the bonnet of a rock crusher.

A more specific object of the invention is to provide a rock crusher having a bowl formed with upstanding integral ears which project upwardly through openings in the overlying bonnet, the bowl being retained in place by securing means operatively connecting the ears and bonnet.

Another object is to provide a novel bowl for a rock crusher.

Various other objects of the invention will be apparent from the following description taken in connection with the accompanying drawings wherein:

FIG. 1 is a vertical, midsectional, fragmentary view througha rock crusher of the present invention, FIG. 1 being taken along line 11 of FIG. 4;

FIG. 2 is an enlarged View of a portion of the structure in FIG. 1;

FIG. 3 is a horizontal, fragmentary section taken along line 33 of FIG. 1;

FIG. 4 is a horizontal section taken along line 44 of FIG. 1; and

FIG. 5 is a schematic diagram showing part of the hydraulic circuit of the bonnet support clamp system.

The crusher in FIGS. 1-5 has a main frame F which rotatably supports a camming member C which in turn rotatably supports a crusher head H. The camming member is driven by a drive system D to cause wobbling movement of the crusher head. This general arrangement is shown more fully in my United States Patent No. 3,118,623, which was copending with my prior parent application heretofore identified.

A bonnet support 11 is supported on the frame F by a plurality of supporting assemblies A of the present invention, one being shown in FIG. 1 and twelve being shown in FIG. 4. The bonnet support supports a bonnet unit which includes a bonnet 13 and a bowl or concave 15.

Mounted on the bonnet support is a hold-down system HDS for holding the bonnet 13 down against the bonnet support 11, and releasable when non-crushable matter enters the crusher to prevent damage to the crusher. Because certain parts of the hold-down system appear in the drawings in places where their identity would be helpful, a brief reference to such parts will now be made. The major part of the hold-down system is supported in spaced relation above the bonnet support by a plurality of spacer studs 21 (FIGS. 1 and 4), and the hold-down system includes a plurality of piston and cylinder units 22 which apply downward pressure on the bonnet unit through thrust pins 23 (FIGS. 1 and 4).

The bonnet support is retained in fixed relation to the main frame F, both vertically and laterally, by the supporting assemblies A. Since the assemblies are of identical construction, the detail construction of one will sufiice.

Referring to FIGS. 1 and 2, an assembly includes a vertical rod in the form of a draw bolt 31 which has a head 33 (FIG. 1) disposed beneath a curved segment 35 of a segmented wedging ring. Two other segments 35a and 35b are shown in FIG. 3 in flanking relation to a fourth segment 350, which is shown in FIG. 1 on the opposite side of the frame F from segment 35.

The wedging ring segments fit between a camming surface provided by an inwardly extending lip 37 on frame F and an opposed surface provided by an annular skirt 39 on the bonnet support 11. The shank of the draw bolt 31 projects upwardly through matching but somewhat oversize holes in the segment 35 and the inwardly extending lip 37. The draw bolt shank then extends upwardly through slots 41 (FIG. 1) of a lower stack S of shims, through an outwardly projecting annular flange 43 on the bonnet support 11, through an expander unit 45, and then through the slots 41 of an upper stack S of shims. A washer 47 (FIG. 2) fits on the upper end of the draw bolt, which end is threaded to receive a pair of jam nuts 49.

The expander unit is best shown in FIG. 2 and includes an open top cylinder 61 having a depending tubular portion 62 fitting in a recess formed in the flange 43. A piston 63 slidably fits within the cylinder and slidably engages the draw bolt 31 and has a depending tubular portion 65 slidably fitting within a head 67 of the cylinder. Spaced seals at 69 and 71 are provided between the piston and cylinder. Since there is no seal between the draw bolt and either the piston or cylinder, the draw bolts need not have a specially machined surface.

Fluid is supplied to the expander unit 45 through a nipple 73 which communicates with an manifold groove 75 in the periphery of the flange 43 of the bonnet support. A closure strip 76 closes the outer portion of the groove to provide a passageway. FIG. 5 shows that the groove is connected by a conduit 77 to an accumulator 79 of the crusher. A valve 81 controls the flow of fluid from the accumulator to the groove. A valve 83 controls the discharge of fluid from the groove 75. The discharged fluid may be discarded or many be returned to the accumulator through a pump 84. If the pump 84 is employed, it is contemplated that the valve 83 will be provided with a quick disconnect coupling 85 to enable it to be readily connected to a similar coupling 86 on a discharge or drain hose 87 to discharge the fluid into a fluid reservoir 88. The fluid can be' returned to the pump 84 through a line 89. When it is desired to return fluid to the accumulator, a pressure hose 90 from the pump 84, having a quick disconnect coupling 91, is connected to the coupling 85. The valve 83 is opened and pressure is built up in the manifold groove 75, after which the valve 81 is opened to inject fluid into the accumulator 79. Then valve 83 is closed to isolate the pump 84 from the overall hydraulic circuit of the crusher. The pump may be removed from the machine or may be permanently mounted on the machine, and may be manually operated or power operated.

The accumulator 79 mentioned above is one of the accumulators already on the machine for supplying fluid under pressure to piston and cylinder units 22 of the holddo-wn system HDS.

There are a pair of stops in spaced relation beneath each of the wedging segments, and FIG. 1 shows one of the stops 92 beneath the segment 350. These stops merely limit downward movement of the segments after they have been released.

A screw jack 93 (FIGS. 1 and 3) is provided for each wedging segment for breaking the segment away from its wedged position. The screw jacks are the same and so a description of the one shown in FIG. 1 will suffice.

The jack 93 threads downwardly through a nut 95,

which is threadedly mounted in the flange 43, and then extends downwardly toward and is in alignment with a headed break pin 97. The break pin 97 extends downwardly through an oversize hole in the frame lip 37 and bottoms in a blind hole 99 formed in the segment 350. In such position, the head 101 of the pin 97 is slightly spaced from a seat 103 formed in the flange 43.

When fluid is released from the expander units 45 of the supporting assemblies A of the bonnet support, the upward forces on the draw bolts 31 are released. Then, by threading down the jack screws, the pins 97 are forced downwardly to break the fractional grip between the wedging segments and the lip 43 and skirt 39. Thereafter the heads of the pins 97 seat in their seats so that further pressure applied against the break pins (when lifting the bonnet support) will be transmitted directly to the main frame F.

A dirt shield 106 is provided on the piston 63 of each unit 45 and overlaps the associated cylinder 61. The bowl or concave is conventionally formed of manganese steel. I support this bowl from the bonnet 13 by means of a plurality of ears 109 (FIGS. 1 and 4), six being shown, which are cast on the bowl proper and project upwardly through openings or notches 113 formed in the bonnet. The openings 113 are defined by bosses 115 which have horizontal upper edges. Wedges pieces 117 are driven through the'openings 119 in the ears 109 and across such edges to draw thebowl upwardly against the bonnet. Thereafter a filler 121 can be poured into the space formed between the bowl and bonnet to form a good load bearing material between the upper portion of the bowl and bonnet.

I provide a dust guard shield 123 (FIG. 1) around the crusher to enclose the space between the flange 43 and the lip 37 to keep dirt from accumulating in the holes occupied by the break pins 97 Having described the invention in what is considered to be the preferred embodiment thereof, it is desired that it be understood that the invention is not to be limited other than by the provisions of the following claims.

I claim:

1. A rock crusher having a manganese steel bowl,

a bonnet for carrying the bowl,

said bonnet having a plurality of openings therein,

said bowl having a plurality of integral upstanding ears projecting upwardly through said openings, said ears having fully enclosed, transversely extending holes therethrough,

and wedging means extending through said holes and disposed in wedging relationship between said ears and the upper surface of said bonnet,

formed 2. In a rock crusher of the type having a rotary head anda circular bowl disposed in general overlying spaced relation with respect to said head, i

a circular bonnet above said bowl,

a frame supporting said bonnet,

said bonnet having a plurality of openings formed in spaced circumferential relation thereabout,

said bowl having a plurality of integral upstanding ears projecting upwardly through said openings,

said ears having in the upper portions thereof holes extending transversely therethrough, said holes being centrally disposed in said ears to define pairs of legsjo n opposite sides of said holes,.and

wedging means extending through said holes and dis posed in wedging relationship between said ears and the upper surface of said bonnet.

3. A rock crusher as set forth in claim 2, wherein said bonnet includes bosses through which said openings extend and said bowl and bonnet are generally of frustoconical form and obliquely related to the horizontal, but where the axes of said ears and bosses are vertical.

4. A bowl or liner for a rock crusher of the type having a head for gyration beneath the bowl and cooperable therewith for crushing rock and a bonnet thereabove against which the bowl is to be clamped,

said bowl comprising a generally circular rigid member having a lower crushing face that generally is of frusto-conical form, 7

said bowl having an upper mounting face for engagement with the bonnet of said crusher,

said bowl having a plurality of uniformly spaced upstanding ears for projecting through said bonnet and by which said bowl may be clamped against said bonnet by wedges driven through said ears,

said ears defining fully enclosed loops for receiving said wedges to provide balanced tension on both legs of each loop.

5. The liner of claim 4 wherein the upper surface of said bowl comprises a lower frusto-con-ical portion adapted to fit in the bonnet and an upper portion stepped inwardly from said lower frusto-conical portion for defining-a space with the adjacent portion of said bonnet for receiving a filler.

References Cited by the Examiner UNITED STATES PATENTS 2,226,341 12/ 1940 Gruender 241-299 ROBERT C. RIORDON, Primary Examiner. LESTER M. SWINGLE, Examiner.

D. KELLY, Assistant Examiner.

Claims

2. IN A ROCK CRUSHER OF THE TYPE HAVING A ROTARY HEAD AND A CIRCULAR BOWL DISPOSED IN GENERAL OVERLYING SPACED RELATION WITH RESPECT TO SAID HEAD, A CIRCULAR BONNET ABOVE SAID BOWL, A FRAME SUPPORTING SAID BONNET, SAID BONNET HAVING A PLURALITY OF OIPENINGS FORMED IN SPACED CIRCUMFERENTIAL RELATION THEREABOUT, SAID BOWL HAVING A PLURALITY OF INTEGRAL UPSTANDING EARS PROJECTING UPWARDLY THROUGH SAID OPENINGS, SAID EARS HAVING IN THE UPPER PORTIONS THEREOF HOLES EXTENDING TRANSVERSELY THERETHROUGH, SAID HOLES BEING CENTRALLY DISPOSED IN SAID EARS TO DEFINE PAIRS OF LEGS ON OPPOSITE SIDES OF SAID HOLES, AND WEDGING MEANS EXTENDING THROUGH SAID HOLES AND DISPOSED IN WEDGING RELATIONSHIP BETWEEN SAID EARS AND THE UPPER SURFACE OF SAID BONNET.