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Патент USA US3076622

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United States Patent O?ice
3,076,612
Patented Feb. :5,‘ 1963
2
1
location next to the inner surface 44 and is intended to
be axially aligned with the mantle socket such that, when
fully inserted in the mantle socket, the surfaces 30 and
32 will abut without the projection hitting the inner wall
s 076 612
MANTLE STRUCTURE’ Fo’R GYRATORY CRUSHER
Jerome C. Motz, Milwaukee, Wis., assignor to Nordberg
Manufacturing Company, Milwaukee, Wis, a corpora
46 of the socket.
It will be noted in FIGURE 3 that the side surfaces 48
of the socket are tapered somewhat, and this taper may
be matched by a corresponding taper on the side of the
projection, as at 50. In any event, the projection ?ts in
the socket without contact except along one tapered side.
I prefer one projection on the mantle extension and two
or more sockets, equidistantly spaced around the upper
tlon of Wisconsin
Filed Dec. 16, 1960, Ser. No. 76,297
2 Claims. (Cl. 241-295)
This invention is in the ?eld of wearing parts for gyra
tory crushers and the like and is concerned with a mantle
set with an interlock making the wearing parts automati
cally self-tightening.
_
A primary object is a mantle set which greatly simpli
?es manufacture.
edge of the mantle.
In FIGURES 4 and 5 an alternate form has been shown
‘ Another object is a mantle with a socket at its upper 15 ‘in which I extend the inner surface of the mantle some
what, at 52, inwardly on each side of the socket to insure
full engagement between the tapered side walls of the
socket and projection. In many cases the throat of the
mantle may be substantially out-of-round. By giving the
mantle socket.
'
V
- Another object is an interlock for a mantle set for use 20 socket additional radial extent, I insure ?rm peripheral
contact between the tapered sides of the socket and the
in a gyratory crusher which simpli?es and speeds up grind
inner peripheral seat or throat.
Another object is a mantle extension with a locking
projection at its lower outer edge adapted to ?t in the
projection.
mg and ?nishingof the mantle parts.
Other objects will-appear from time to time in the
' I prefer to remove or core back the inner portion of
the lower outer edge of the mantle extension, as at 54.
ensuing speci?cation and drawings in which:
FIGURE 1 is a vertical section through the head of a 25 The cored ‘back portion is peripherally aligned with the
projection. Thus, this area does not have to be machined
gyratory crusher;
and in no event will it interfere with or contact the throat
FIGURE 2 is an enlargement of the interlock shown
surface 32 of the mantle.
in FIGURE 1;
FIGURE 3 is a top View of the parts in FIGURE 2,
I may provide pouring openings 56, shown in this case
FIGURE 5 is a section along line 5—5 of FIGURE 4.
I have not shown the main frame and bowl structure
of a gyratory crusher in FIGURE 1 since these may be
at two 180 ‘degrees apart, so that the backing material
may be poured in one while the other vents. I may also
use a removable pouring spout 58, if desired.
The use, operation and function of my invention are as
follows:
I. provide an interlock for a mantle set which greatly
35
conventional. I have only shown the gyrating head and
its related parts and the drive has also been omitted since
it is not important.
ply and quickly ground when the mantle is positioned
separated;
FIGURE 4 is a sect-ion similar to FIGURE 2 of a modi
?ed form; and
simpli?es grinding and ?nishing of the mantle parts. The
seat at the upper end or throat of the mantle can be sim
upright in a turntable without any interference. The pro
The head 10 has a main shaft 12 with an extension 14
jection on the mantle extension does not interfere with
suitably bolted, as at 16, above the main shaft on the
the machining of the lower edge of the mantle extension.
‘head. The threaded upper end ‘18' of the extension carries
And the portion of the abutting surface of the mantle
a main shaft nut 20 which applies a downward thrust
extension peripherally aligned with the projection is cored
through a torch ring 22 or the like to a mantle extension
back to prevent interference between the two abutting
24. The lower edge of the mantle extension in turn abuts
45 surfaces.
the upper edge of the mantle 26.
A mantle set of this type may be used where it is to
Both the mantle and mantle extension may be consid
be backed with a suitable backing material, such as zinc,
ered to make up a set of wearing elements which, during
or on ground back manganese where no backing material
crushing, are intended to wear out and be replaced. Both
is used.
are preferably made of manganese steel or its equivalent.
Additionally, the interlock does not project inwardly
Both may be considered to be generally ?rusto-conic, one
of the inner surfaces of the mantle and mantle extension
being an extension of the other, and in certain situations
so that the location of the abutting surfaces can be either
the mantle may de?ne a cavity or chamber 28 along its
above or below the top of the head. This is particularly
inner surface next to the head at least for a substantial
advantageous in ground back manganese with no backing
portion of the length of the mantle for a backing mate
55 material.
rial, such as molten zinc or the like.
Further, the interlock will be effective even through the
The lower edge surface 30 of the mantle extension may
cast mantle may be substantially out-of-round.
be considered ?at, except as hereinafter set forth, and
In the case of a ground back mantle, the socket or
generally frusto-oonical so that it matches the ?at conical
sockets
do not interfere with grinding.
upper edge surface 32 of the mantle. The upper inner
The basic advantage of a mantle set of this type is that
opening of the frusto-con-ical mantle may be referred to
the mantle will be self-tightening. The thrust or torque
of the head nut will be self-tightening. Also, the outer
and inner surfaces will not have any extending projections
or other interruptions which will hinder grinding or ?n
as the throat, and the surface 32 ?rmly abuts the lower
edge surface 30 of the mantle extension thereby passing
the thrust of the head nut 20‘ from the mantle extension
down through the mantle to the mantle seating 34 on the
head.
I provide at least two notches or sockets 36 in the upper
edge surface of the mantle. Each notch opens through
the upper edge surface 32 and also through the inner sur
65
ishing.
While I have shown and described a preferred form
and one modi?cation of my invention, it should be under
stood that suitable additional modi?cations, substitutions
and alterations may be made without departing from the
wearing surface 40. I also provide a projection 42 ex 70 invention’s fundamental theme. I, therefore, wish that
the invention be unrestricted, except as by the appended
tending down and out from the lower edge surface 30
claims.
of the mantle extension. The projection extends from a
face 38 of the mantle, but not through the front or outer
3,076,612
3
4
I claim:
2. For use in a gyratory crusher having an outwardly
and ‘downwardly ?aring head adapted to de?ne a concave
1. For use in a gyratory crusher having an outwardly
and downwardly ?aring head adapted to de?ne a concave
crushing cavity with an overhanging bowl, the improve
ment comprising a frusto-conic mantle set adapted to be
disposed on the head as a wearing and replacement assem
bly, the set vincluding a frusto-conic mantle adapted to be
‘disposed on the head, small end up, a throat at the small
upper end of the mantle de?ning a conical seat, an annu
lar generally frusto-conic mantle extension adapted to be
‘disposed on the head with its outer lower peripheral edge
in engagement with the conical seat at the throat of the
mantle, and an interlock between the conical seat at the
crushing cavity with an ‘overhanging bowl, the improve
ment comprising a frusto-conic mantle adapted to be dis
posed on the head as a wearing and replacement part, the
upper inner edge of the mantle being disposed on the
head, small end up, a throat at the small upper end of
the mantle de?ning a conical seat adapted to be engaged
‘by the outer lower peripheral edge of a frusto-conic man
10 tle extension, and at least one socket, with side surfaces
diverging inwardly, and a generally ?at inner Wall open
ing through the seat at the throat of the mantle and
through the inner surface of the mantle, but not through
the outer surface, to accept a locking projection rigid
throat of the mantle and the outer lower peripheral edge
of the mantle extension, including at least one socket, with 15 on the outer lower peripheral edge of the mantle exten
side surfaces diverging inwardly, and a generally flat inner
sion, the generally ?at inner wall of the socket being dis
wall in the mantle opening through the seat at the throat
posed generally vertically When the mantle is mounted
and through the inner surface of the mantle, but not
on the head of a crusher.
through the outer surface, the generally flat inner wall
of the socket being disposed generally vertically when the 20
mantle is mounted on the head of a crusher, and a pro
jection urged on the mantle extension extending from the
outer lower peripheral edge thereof and disposed substan
tially completely between the imaginary extensions of the
inner and outer surfaces of the mantle extension out of 25
contact with the flat inner wall of the socket, when prop
erly mounted.
References Cited in the ?le of this patent
UNITED STATES PATENTS
1,066,277
‘1,154,100
1,424,792
1,459,305
Hunter ________________ .... July 1,
De Wein _____________ __ Sept. 21,
Ackermann ____________ __ Aug. 8,
Kennedy _____________ .. June 19,
1913
1915
1922
1923
1,592,312
Symons ______________ __ July 13, 1926
2,971,705
Werner ______________ __ Feb. 14, 1961
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