Abstrict An upright frame is secured to the base member of a rock crusher
and supports a slide bar for horizontal movement. A fluid-operated
cylinder is connected between the upright frame and the slide bar
for driving the latter longitudinally in both directions, and a
pivotal driver is mounted on the slide bar for movement into and
out of engagement with projections on the crusher bowl. A second
fluid-operated cylinder is connected between the slide bar and the
driver for pivoting the latter between an inner engaging position
with the projections and an outer release position. By suitable
operation of the two fluid-operated cylinders, the bowl can be rotatably
driven on threads on the base member for installing it and removing
it. An upright extension is attachable to the slide bar and carries
an auxiliary driver thereon disposed above the main driver so as
to engage the projections on the bowl when such projections are
above the plane of the main driver such as when installing or removing
the bowl. A jam nut is employed to lock the bowl non-rotatably on
its base member and such jam nut is driven by a fluid operated cylinder
having adjusted mounted positions for repositioning such cylinder
in the event of thread wear.
Claims Having thus described my invention, I claim:
1. A power driven bowl rotating mechanism for use with rock crushers
of the type having a base member and a bowl threadedly supported
on the base member whereby upon rotation thereof the bowl is arranged
to be raised or lowered, the bowl being of the type which has a
plurality of projections secured in spaced relation around the periphery
thereof, said power driven bowl rotating mechanism comprising
(a) an upright frame arranged to be secured to the base member
of a crusher,
(b) a slide bar supported on said upright frame for horizontal
slidable movement,
(c) first double acting means connected between said upright frame
and said slide bar and arranged to drive said slide bar longitudinally
in reciprocating movement,
(d) driver means pivotally mounted on said slide bar arranged for
movement inwardly and outwardly relative to the bowl,
(e) socket means in said driver means arranged to engage the projections
on the bowl in an inward position of said driver means whereby the
bowl is rotated by operation of said slide bar in one direction
of its reciprocating movement and upon outward movement of said
driver means out of engagement of said socket means with the projections,
said driver means is movable with said bar in the other direction
of reciprocating movement into a position for engagement of said
socket means with a succeeding projection for further rotation of
said bowl upon operation of said double acting means,
(f) and second double acting means connected between said slide
bar and said driver means for pivoting the latter between its inner
and outer positions,
(g) said socket means having a driving edge on each defining side
thereof for driving the bowl in either direction of rotation as
well as for holding the bowl from overrunning after each rotative
function.
2. The power driven bowl rotating mechanism of claim 1 wherein
said upright frame comprises a pair of upright end supports arranged
to be secured at the bottom thereof to said base member ans secured
together by a longitudinal connecting frame member adjacent the
lower end thereof, said slide bar having slidable support between
said upright end supports.
3. The power driven bowl rotating mechanism of claim 2 wherein
said first double acting means is disposed between said upright
end supports and below said slide bar.
4. The power driven bowl rotating mechanism of claim 1 wherein
said driver means includes a pair of spaced arms having the pivot
connection thereof on said slide bar adjacent one end of said arms,
said socket means comprising notches in both of said arms.
5. The power driven bowl rotating mechanism of claim 4 including
a connecting web secured between said spaced arms on each side of
said socket means and forming said driving edges.
6. A power driven bowl rotating mechanism for use with rock crushers
of the type having a base member and a bowl threadedly supported
on the base member whereby upon rotation thereof the bowl is arranged
to be raised or lowered, the bowl being of the type which has a
plurality of projections secured in spaced relation around the periphery
thereof, said power driven bowl rotating mechanism comprising
(a) an upright frame arranged to be secured to the base member
of a crusher,
(b) a slide bar supported on said upright frame for horizontal
slidable movement,
(c) first double acting means connected between said upright frame
and said slide bar and arranged to drive said slide bar longitudinally
in reciprocating movement,
(d) driver means pivotally mounted on said slide bar arranged for
movement inwardly and outwardly relative to the bowl,
(e) socket means in said driver means arranged to engage the projections
on the bowl in an inward position of said driver means whereby the
bowl is rotated by operation of said slide bar in one direction
of its reciprocating movement and upon outward movement of said
driver means out of engagement of said socket means with the projections,
said driver means is movable with said bar in the other direction
of reciprocating movement into a position for engagement of said
socket means with a succeeding projection for further rotation of
said bowl upon operation of said double acting means,
(f) second double acting means connected between said slide bar
and said driver means for pivoting the latter between its inner
and outer positions,
(g) an upright extension frame attachable to said slide bar and
projecting above the latter,
(h) and pivotally mounted auxiliary driver means on said extension
frame arranged for engagement with the projections in an initial
upper threaded engagement of said bowl when the projections are
above said first mentioned driver means.
7. The power driven bowl rotating mechanism of claim 6 wherein
said upright extension frame includes end members attachable to
said slide bar and an upper connecting member secured between said
end members, said auxiliary driver means being pivotally mounted
on said connecting member.
8. The power driven bowl rotating mechanism of claim 6 wherein
said auxiliary driver means is spring biased toward said projections
and operates as a ratchet in longitudinal reciprocating movements
of said slide bar to rotate said bowl.
9. A power driven bowl rotating mechanism for use with rock crushers
of the type having a base member and a bowl threadedly supported
on the base member whereby upon rotation thereof the bowl is arranged
to be raised or lowered, the bowl being of the type which has a
plurality of projections secured in spaced relation around the periphery
thereof, said power driven bowl rotating mechanism comprising
(a) an upright frame arranged to be secured to the base member
of a crusher,
(b) a slide bar supported on said upright frame for horizontal
slidable movement,
(c) first double acting means connected between said upright frame
and said slide bar and arranged to drive said slide bar longitudinally
in reciprocating movement,
(d) driver means pivotally mounted on said slide bar arranged for
movement inwardly and outwardly relative to the bowl,
(e) socket means in said driver means arranged to engage the projections
on the bowl in an inward position of said driver means whereby the
bowl is rotated by operation of said slide bar in one direction
of its reciprocating movement and upon outward movement of said
driver means out of engagement of said socket means with the projections,
said driver means is movable with said bar in the other direction
of reciprocating movement into a position for engagement of said
socket means with a succeeding projection for further rotation of
said bowl upon operation of said double acting means,
(f) second double acting means connected between said slide bar
and said driver means for pivoting the latter between its inner
and outer positions,
(g) jam nut means arranged for threaded engagement with the bowl
and arranged to be vertically abutted against the base member whereby
to hold the bowl and base member in non-rotative connection when
the threads of said jam nut means are forcefully jammed against
the threads of the bowl,
(h) fluid-operated cylinder means arranged to be connected between
the base member and said jam nut means and arranged to drive said
jam nut means rotatably into connecting and release positions,
(i) said fluid-operated cylinder means being arranged to have at
least two mounting positions on the base member for varying the
drive stroke thereof.
Description This invention relates to new and useful improvements in rock crushers
and more particularly pertains to power driven structure for rotating
the bowl portion of the rock crusher to install, remove, or adjust
such bowl portion.
Rock crushers of the gyratory type have an annular bowl which serves
as the receiving portion for base material to be crushed and which
is associated with an inner mantle for accomplishing the crushing
operation. The bowls in this type of structure have a threaded support
on the base portion of the crusher, and for installing and removing
the bowl it must be rotated relative to the base. The bowl, due
to its heavy mechanical construction and also due to a galling effect
that may occur in the threads, usually cannot be rotated manually,
at least from a set position after the crusher has been in use,
and definitely cannot be rotated manually while the machine is crushing.
SUMMARY OF THE INVENTION
According to the present invention and forming a primary objective
thereof, novel powered drive means are provided between the base
member and the bowl for driving the bowl rotatably. More particular
objects of the invention are to provide an apparatus of the type
described which is simplified in structure and rugged in operation,
and which provides an efficient drive on the annular bowl for rotating
the latter even while the machine is is crushing operation.
Another object is to provide jam nut means arranged to hold the
bowl in a non-rotative position relative to the base member in the
use position of the crusher, such jam nut means including a fluid-operated
cylinder which has one or more mounted positions on the base member
to adjust for thread wear of the bowl support.
In carrying out the above objectives, an upright frame is secured
to the base member of the crusher and a slide bar is supported on
said upright frame for horizontal slidable movement. First fluid-operated
cylinder means is connected between the upright frame and the slide
bar for driving the latter longitudinally in both directions. A
driver is pivotally mounted on the slide bar which is arranged for
movement into and out of engagement with projections on the bowl
for rotating the bowl. Second fluid-operated cylinder means is associated
with the driver for moving such driver into and out of engagement
with the projections. The invention also includes an easily mountable
and demountable upright extension frame securable to the slide bar
which projects above the latter. This extension frame supports a
pivotally mounted auxiliary driver arranged for engagement with
the projections on the bowl in an initial upper position of the
bowl wherein the projections are above the plane of the lower driver.
Jam nut means are employed between the threads of the bowl and above
the threads on the base member so as to provide a non-rotative connection
between these two members when the threads of the bowl are forcefully
jammed. The jam nut means is powered by a fluid-operated cylinder,
and such cylinder has one of more mounted positions on the base
member for varying the drive stroke thereof.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a fragmentary vertical sectional view taken radially
through a rock crusher employing a bowl threadedly supported on
the crusher and further showing in end elevation a power driven
structure for rotating the bowl according to the present invention,
this view being taken on the line 1--1 of FIG. 2;
FIG. 2 is a side elevational view of the power driven rotating
structure of the present invention, this view being taken on the
line 2--2 of FIG. 1;
FIG. 3 is a fragmentary top plan view taken on the line 3--3 of
FIG. 1;
FIGS. 4 5 and 6 are enlarged fragmentary section views taken on
the lines 4--4 5--5 and 6--6 of FIG. 2 respectively;
FIG. 7 is a top plan view of jam nut drive means as installed on
the crusher;
FIG. 8 is an enlarged, foreshortened side elevational view taken
on the line 8--8 of FIG. 7;
FIG. 9 is a side elevational view taken similar to FIG. 2 but showing
a drive extension attached to the crusher; and
FIG. 10 is a top plan view taken on the line 10--10 of FIG. 9.
DETAILED DESCRIPTION OF A PREFERRED EMBODIMENT
The present invention is associated with a rock crusher of the
type having an annular bowl 10 FIGS. 1 2 and 3 with a hopper
portion 12 FIG. 1 and an inturned flange 14 below its upper edge
which supports a liner 16 by means of eye bolts 18 in a conventional
manner. Liner 16 is associated with a crusher head and other mechanism,
not shown, operative in rock crusher functions.
Bowl 10 has a vertical threaded connection 22 with a bowl nut 24
which forms a part of the base member of the crusher. This threaded
connection includes thread liners 25 constructed of a non-metallic
low coefficient of friction bearing material. These thread liners
are secured to the threads on the bowl nut 24 and take the upward
thrust of the bowl 10 during crushing operations as well as serving
as bearing surfaces when the crusher is being adjusted rotatably.
Such liners prevent seizing of the threads by galling or corrosion.
The bowl nut 24 has a peripheral flange portion 26 with a flat top
surface, and the bowl 10 has an annular angular housing 28 bolted
thereto, the peripheral portion of such housing having evenly spaced
vertical projections or lugs 30 secured thereon.
Power drive means of the invention for rotating the bowl 10 comprises
an upright frame 32 consisting of end supports 34 and 36 having
integral foot portions 38 arranged to be secured suitably, such
as by bolts 40 to the top surface of the flange portion 26 of the
bowl nut. End supports 34 and 36 include a pair of parallel bar-like
members secured together at a lower portion thereof by a longitudinal
reinforcing and connecting frame member 42. This frame member is
secured, as by welding, between the two bar-like members and has
intermediate supports 43 also with foot portions 38. It has a suitably
contoured bottom edge 44 to accommodate other crusher parts.
Upright frame 32 is straight in its longitudinal configuration,
and if its length requires that one end thereof project outward
beyond the edge of the bowl nut, an outrigger 46 at such projecting
end can be used for reinforcement. Outrigger 46 preferably is integral
with the frame 32 as by welding, and bolted to the bowl nut.
Slidably mounted between the end supports 34 and 36 adjacent an
upper portion thereof is a slide bar 50 having a depending ear 52
intermediate its ends with a bifurcated bottom end, FIG. 6 which
has a straddling support on frame member 42. One end of a fluid-operated
cylinder 54 is connected to the ear 52 by means of a pivot connection
56 and the other end of the cylinder 54 is secured to the end supports
34 by a pivot connection 58. The cylinder 54 is disposed directly
under the slide bar with the end at the pivot connection 58 projecting
between the two members 34.
As best seen in FIG. 4 bar 50 has longitudinal slidable support
between upper and lower shoes 62 in turn mounted on sleeves 64 supported
pivotally on bolts 66 secured between the pairs of end supports.
Shoes 62 have clearance between the end supports for free pivotal
movement and the sleeves 64 are of sufficient length to act as spacers
to maintain such clearance. Bearing liners 68 of a suitable material,
such as lubricating plastic, are disposed between the slide bar
50 and its confining parts, such liners preferably being secured
to the inwardly directed surfaces of the members 34 36 and 62
by a suitable adhesive.
Conventional control means, not shown, are employed for operating
the cylinder 54 in both directions.
Slide bar 50 is arranged in its powered movement to rotate bowl
10 and a drive connection between such bar and the bowl is accomplished
by a driver 70 FIGS. 1-3 5 and 6 having a body member constructed
of a top plate 72 and a bottom plate 74 interconnected integrally
by a pair of cross webs 76 extending therebetween and disposed with
their facing edges a distance apart which is slightly greater than
the diameter of the projections 30. Plates 72 and 74 are recessed
between the facing edges of the webs 76 so that socket portions
will be formed between such webs for receiving the projections 30.
The end of the driver 70 opposite from the socket end has a pivot
connection 80 on a lateral extension 82 suitably secured to the
side of the bar 50 as by bolts 84. Extension 82 is mounted on the
bowl side of the bar 50 and the top plate 72 of the driver has
a lever arm portion 86 projecting on the opposite side of the bar
from the extension 82 and having a pivot connection 88 with one
end of a fluid-operated cylinder 90 having a pivot connection 92
at its opposite end with an ear 94 projecting integrally from a
side of the slide bar 50. By suitable operation of cylinder 90
the driver 70 can be moved into engagement with projections 30 or
it can be moved out of the plane of rotation of the projections.
Conventional control means, not shown, are provided for operating
the cylinder 90.
When it is desired to power rotate the bowl 10 such as when it
is to be tightened down on the bowl nut or when it is to be loosened,
driver 70 is pivoted inwardly into engagement with one of the projections
30 by suitable operation of the cylinder 90 and the cylinder 54
then operated to drive the slide bar 50 longitudinally in a desired
direction which is turn rotates the bowl. After a drive step has
been accomplished, the driver 70 is swung outwardly by means of
the cylinder 90 and the slide bar 50 retracted by the cylinder 54
to engage a succeeding projection 30 for another drive step. The
structural arrangement shown and described, comprising the slide
bar 50 supported slidably between the end uprights, the specific
construction of the driver 70 employing body members disposed above
and below the bar 50 and the support of the cylinder 54 directly
under the slide bar, makes for a compact, simplified, and rugged
structure. In addition, the slide bar and associated structure are
disposed close to the bowl to provide an efficient tangential drive
on the bowl. Powered adjustment of the bowl can be accomplished
if desired while the crusher is in operation. Although only one
bowl drive mechanism is illustrated herein, it is preferred that
two of such mechanisms be provided in diametrical alignment.
In an upper position of the bowl 10 such as when the bowl is being
initially lowered into place, or when it is being removed the projections
30 may be in a plane above the driver 70 and it may be desired that
powered rotation at this initial stage be available. For this purpose,
the slide bar 50 is provided with a vertical extension 100 FIGS.
9 and 10 employing pairs of end uprights 102 and 104 straddling
the bar 50 at their lower ends and bolted thereto by bolts 106.
The uprights 102 and 104 are connected integrally to each other
by a longitudinal frame member 108 welded in place between the uprights,
and this frame member includes a pivot support 109 for a driver
110 on its top edge which can be used either for a push or pull
function. Driver 110 comprises a pawl which is spring biased toward
the bowl 10 by a tension spring 112 connected at one end to one
of the uprights 102 and at its other end to a lever arm 114 threadedly
secured to the pawl. The pawl as shown in FIGS. 9 and 10 is installed
to rotate the bowl 10 in a pulling function in the direction of
arrow 116 as viewed in FIG. 10 upon driving movement of the slide
bar 50. To rotate the bowl in the opposite direction, pawl 110 is
turned over and its spring lever bolt 114 transferred to a threaded
mounting on the other side. When in this latter position, the pawl
will push instead of pull. The pawl 110 is made with a ramp or cam
edge 110a on each side to ride over the projections 30 when the
pawl returns with the slide bar 50 for a new grip.
As stated, the extension 100 and its pawl are primarily used to
start the threaded rotation of the bowl down on the bowl nut 24
or to remove the bowl from the threads. Assembly 100 is not intended
to be used for normal adjustment of crusher setting and generally
will be removed except when installing and removing the bowl.
It is necessary to firmly jam or lock the threaded engagement between
the bowl 10 and the bowl nut 24 to maintain desired crusher adjustment
and to resist destructive movement during crushing operations. For
this purpose, and annular jam nut 120 FIG. 1 seats on the top
edge of the bowl nut 24 and threadedly engages the threads of the
bowl. A non-metallic low coefficient of friction bearing washer
122 is disposed between the jam nut 120 and the bowl nut 24 and
the thread liners 25 also extend up into the threads between the
jam nut and the bowl. An upright sleeve 124 is secured, as by welding,
to the outer peripheral surface of jam nut 120 with portions thereof
projecting above and below the jam nut. Sleeve 124 fits inside of
angular housing 28 and has a combination bearing and dust seal 126
disposed between these overlapping portions and secured to the member
28. The overlapping feature of angular housing 28 with relation
to the sleeve 124 protects the latter from dirt.
With reference to FIGS. 7 and 8 jam nut 120 has a depending lug
130 and this lug has a pivot connection 132 with one end of a fluid-operated
cylinder 134 having its other end connected to a cross link 136
by a pivot connection 137. Link 136 in turn has screw connections
138 on parallel base portions 140 having two or more threaded holes
142 along their length arranged to receive the screws 138 so that
the cylinder can have two or more mounted locations on the bowl
nut 24. By means of this adjustment, the cylinder can be repositioned
in the event of thread wear so that the jam nut 120 can be tightened
without the piston bottoming out. The drive means of the jam nut
are suitably located around the bowl from the bowl drive mechanism
and may include two of them in diametrical alignment.
A protective shield 142 which is shown in broken lines in FIGS.
1 and 3 and mostly broken away in FIG. 2 is mounted on brackets
144 integral with the end supports 34 and 36. It is removed when
the extension 100 is used but is reinstalled when said extension
is removed.
It is to be understood that the form of my invention herein shown
and described is to be taken as a preferred example of the same
and that various changes in the shape, size and arrangement of parts
may be restored to without departing from the spirit of my invention,
or the scope of the subjoined claims. |