Abstrict An outlet clearance adjustment mechanism of a jaw crusher, which
is small in size, simple in structure, and capable of reducing outlet
clearance adjusting time, is provided. For this purpose, the outlet
clearance adjustment mechanism includes a toggle block (30) having
a downward inclined plane (31), a toggle block frame (32) having
a mounting surface (33) on which the toggle block (30) is slidably
mounted and an inclined plane (34) provided to oppose the downward
inclined plane (31), a detachable clearance adjustment shim (36)
provided between the opposing downward inclined plane (31) and the
inclined plane (34), and the hydraulic type of mechanical lock cylinder
(40) provided at a back side of the inclined plane (34) of the toggle
block frame (32).
Claims What is claimed is:
1. An outlet clearance adjustment mechanism of a jaw crusher, said
jaw crusher including a stationary jaw mounted to a frame; a movable
jaw which faces said stationary jaw and swingingly moves; a toggle
block placed at a back side of said movable jaw and abutting said
movable jaw via a toggle plate; and a toggle block frame fixedly
provided at said frame and supporting said toggle block; wherein
said toggle block has a downward inclined plane with a lower portion
being protruded on a surface at an opposite side to said toggle
plate, and wherein said toggle block frame has a mounting surface
on which the toggle block having said downward inclined plane is
slidably mounted, and an inclined plane provided to oppose said
downward inclined plane; said outlet clearance adjustment mechanism
comprising: a detachable clearance adjustment shim provided between
said downward inclined plane and said inclined plane opposing each
other; and a hydraulic mechanical lock cylinder provided at a back
side of the inclined plane of said toggle block frame; wherein said
outlet clearance adjustment mechanism adjusts an outlet clearance
between said stationary jaw and said movable jaw.
2. A self-propelled crushing machine, comprising a self-propelled
vehicle loaded with a jaw crusher including an outlet clearance
adjustment mechanism of the jaw crusher, said jaw crusher including:
a stationary jaw mounted to a frame; a movable jaw which faces said
stationary jaw and swingingly moves; a toggle block placed at a
back side of said movable jaw and abutting said movable jaw via
a toggle plate; and a toggle block frame fixedly provided at said
frame and supporting said toggle block; wherein said toggle block
has a downward inclined plane with a lower portion being protruded
on a surface at an opposite side to said toggle plate, and wherein
said toggle block frame has a mounting surface on which the toggle
block having said downward inclined plane is slidably mounted, and
an inclined plane provided to oppose said downward inclined plane;
said outlet clearance adjustment mechanism comprising: a detachable
clearance adjustment shim provided between said downward inclined
plane and said inclined plane opposing each other; and a hydraulic
mechanical lock cylinder provided at a back side of the inclined
plane of said toggle block frame; wherein said outlet clearance
adjustment mechanism adjusts an outlet clearance between said stationary
jaw and said movable jaw.
Description TECHNICAL FIELD
The present invention relates to an outlet clearance adjustment
mechanism for adjusting an outlet clearance between a stationary
jaw and a movable jaw of a jaw crusher, and a self-propelled crushing
machine loaded with a jaw crusher having the outlet clearance adjustment
mechanism.
BACKGROUND ART
An example of a jaw crusher will be explained with reference to
a self-propelled jaw crusher 1 shown in FIG. 7. In FIG. 7 a traveling
body 2 is loaded with a hopper 3 a feeder 4 a jaw crusher 10
and a belt conveyor 5. The jaw crusher 10 includes a stationary
jaw 11 and a movable jaw 12 swingingly moves relative thereto, which
form a V shape with a wide upper portion. A material 6 to be crushed
such as a concrete block, rock, stone or the like is charged into
the hopper 3 transferred to an upper portion of the jaw crusher
10 by the feeder 10 then crushed inside the jaw crusher 10 and
discharged outside from a lower outlet by the belt conveyor 5 to
be a product. The grain diameter of a crushed product is determined
by an outlet clearance .delta. between the stationary jaw 11 and
the movable jaw 12. When the stationary jaw 11 and the movable jaw
12 are worn as a result of continuing crushing for a long time,
or the grain diameter of the crushed product is to be changed, it
is necessary to accurately readjust the outlet clearance .delta..
Thus, jaw crushers generally include outlet clearance adjustment
mechanisms.
Various kinds of outlet clearance adjustment mechanisms of jaw
crushers are conventionally proposed, and those disclosed in, for
example, Japanese Utility Model Laid-open No. 63-141638 Japanese
Utility Model Laid-open No. 63-141639 and International Application
Laid-open No. WO97/36683 are well known.
FIG. 8 is a side view of what is disclosed in Japanese Utility
Model Laid-open No. 63-141638 as the first example. At a guide 60
provided at a frame 7 to which the stationary jaw 11 of the jaw
crusher 10 is mounted, at a back side of the movable jaw 12 a toggle
block 61 is disposed slidably toward the movable jaw 12. A tip end
portion of a toggle plate 13 abuts a first abutment portion 14 provided
at a lower portion of the back of the movable jaw 12. A base end
portion of the toggle plate 13 abuts a second abutment portion 15
provided at a front portion of the toggle block 61. An oil hydraulic
cylinder 64 including a hydraulic mechanical lock device 62 at a
piston rod 63 side is fixedly provided at the frame 7 at a back
side of the toggle block 61. A tip end portion of the piston rod
63 abuts the back of the toggle block 61 via a roller 65. A pre-tension
device 20 for always biasing the lower portion of the movable jaw
12 toward the toggle block 61 and holding the toggle plate 13 between
the first abutment portion 14 and the second abutment portion 15
is provided between the movable jaw 12 and the frame 7. The pre-tension
device 20 is constituted by a spring 23 held between a bracket 21
fixed to the frame 7 and a washer 24 and a rod 22 connected to
a lower end portion of the moving jaw 12 at one end and penetrating
through the spring 23 and the washer 24 and fastened by a nut 25
at the other end. The movable jaw 12 is supported at the frame 7
via an eccentric shaft 16 at an upper end portion, so that rotation
of the eccentric shaft 16 swings the movable jaw 12.
During an operation of the jaw crusher 10 the hydraulic mechanical
lock device 62 is locked. When the outlet clearance between the
stationary jaw 11 and the movable jaw 12 is to be adjusted, a worker
operates a hydraulic device (not shown) to release the lock of the
hydraulic mechanical lock device 62. Thereafter, the outlet clearance
is adjusted by extending or contracting the hydraulic cylinder 64
and then the hydraulic mechanical lock device 62 is locked again.
FIG. 9 is a side view of what is disclosed in Japanese Utility
Model Laid-open No. 63-141639 as the second example. The explanation
of the same components as the first example is omitted by giving
the identical numerals and symbols, and only the different parts
will be explained. An oil hydraulic cylinder 72 including a hydraulic
mechanical lock device 71 is horizontally attached at a back side
of a U-shaped bracket 70 fixedly provided at the frame 7 at the
back side of the movable jaw 12 and the oil hydraulic cylinder
72 is connected to a rear end portion of a toggle block 73. An adjustment
plate 74 is inserted between the bracket 70 and the toggle block
73. An upper oil hydraulic cylinder 76 including the hydraulic mechanical
lock device 71 is attached upright at a bracket 75 fixedly provided
at the frame 7 above the toggle block 73. The upper oil hydraulic
cylinder 76 is connected to the toggle block 73 to pull it upward
and fix it. The upper oil hydraulic cylinder 76 is movable in a
substantially horizontal direction toward the movable jaw 12 and
is attachably and detachably fastened to the bracket 75 by a bolt
77.
During an operation of the jaw crusher 10 the toggle block 73
the adjustment plate 74 and the bracket 70 are in close contact
with each other, and the hydraulic mechanical lock devices 71 and
71 are locked. When the outlet clearance is to be adjusted, a worker
operates a hydraulic device (not shown) to release the lock of the
hydraulic mechanical lock devices 71 of the oil hydraulic cylinder
72 and the upper oil hydraulic cylinder 76. Next, the bolt 77 of
the upper oil hydraulic cylinder 76 is loosened to extend the upper
oil hydraulic cylinder 76 a little. Subsequently, the oil hydraulic
cylinder 72 is extended or contracted to adjust the thickness of
the adjustment plate 74 to thereby adjust the outlet clearance,
and the oil hydraulic cylinder 72 is contracted to bring the adjustment
plate 74 in close contact. Next, the upper hydraulic cylinder 76
is contracted, then the bolt 77 is fastened, and the respective
oil hydraulic mechanical lock devices 71 and 71 are locked.
FIG. 10 is a side view of the outlet clearance adjustment apparatus
disclosed in International Application Laid-open WO97/36683 as the
third example, and FIG. 11 is a view seen from the arrows 11--11
in FIG. 10. The same components as the first example are given the
identical numerals and symbols, the explanation thereof will be
omitted, and only the different parts will be explained. In FIG.
10 and FIG. 11 a downward inclined plane 31 with a lower portion
being protruded is formed on a surface of the toggle block 30 opposite
to the toggle plate 13. A mounting surface 33 for mounting a toggle
block 30 thereon slidably toward the movable jaw 12 is provided
on a toggle block frame 32 fixedly provided at the frame 7. Further,
an inclined plane 34 matching the aforementioned downward inclined
plane 31 of the toggle block 30 is provided on a surface of the
toggle block frame 32 opposing the toggle block 30 to form a V-shaped
opening portion 35 with the mounting surface 33. A clearance adjustment
shim 36 is inserted between the downward inclined plane 31 of the
toggle block 30 and the inclined plane 34 of the toggle block frame
32. A pair of oil hydraulic cylinders 80 and 80 are attached at
the toggle block frame 32 and piston rods 81 and the toggle block
30 at the side of the downward inclined place 31 are connected by
connecting pins 82. The pre-tension device 20 is provided between
the movable jaw 12 and the toggle block frame 32.
FIG. 12 is an oil hydraulic circuit diagram of the clearance adjustment
apparatus of the third example. An output circuit of an oil hydraulic
source 83 and a head side circuit 85 and a bottom side circuit
88 of the oil hydraulic cylinder 80 are connected via an electromagnetic
change-over valve 84. The electromagnetic change-over valve 84 has
three positions f, g, and h. The oil hydraulic cylinder 80 is contracted
at the position f, the oil hydraulic cylinder 80 is held at the
position g, and the oil hydraulic cylinder 80 is extended at the
position h. An accumulator 86 and a pressure switch 87 are connected
to the head side circuit 85 of the oil hydraulic cylinder 80. An
operation lever 57 the electromagnetic change-over valve 84 and
a pressure switch 87 are connected via a controller 58.
Next, an operation will be explained based on FIG. 10 and FIG.
12. During a crushing operation, the electromagnetic valve 84 is
at the position g, and the head side circuit 85 and the bottom side
circuit 88 of the oil hydraulic cylinder 80 are closed. When the
outlet clearance is to be adjusted, a worker operates the operation
lever 57 to switch the electromagnetic change-over valve 84 to the
position h by a command signal from the controller 58 to thereby
extend the oil hydraulic cylinder 80. Next, the clearance adjustment
shim 36 is adjusted to determine the position of the toggle block
30 to thereby set the outlet clearance. Subsequently, the operation
lever 57 is operated to switch the electromagnetic change-over valve
84 to the position f to thereby contract the oil hydraulic cylinder
80 whereby the toggle block 30 the clearance adjustment shim 36
and the toggle block frame 32 are in close contact with each other.
FIG. 13 is a plane view of the conventional outlet clearance adjustment
mechanism being the fourth example. Since the relationship between
the toggle block frame 32 and the toggle block 30 is the same as
that of the third example, the explanation with a side view will
be omitted and only the different parts will be explained. In FIG.
13 the same components as in the third example are given the same
numerals and symbols. An oil hydraulic cylinder 90 attached to a
center portion of the toggle block frame 32 are connected to the
toggle block 30. A pair of tension rods 91 and 91 for connecting
the toggle block 30 and the toggle block frame 32 are provided at
the left and right side of the oil hydraulic cylinder 90. Double
nuts 92 and 92 are fastened to rear end portions of the tension
rods 91 and 91 whereby the toggle block 30 is brought into close
contact with the toggle block frame 32.
The oil hydraulic cylinder 90 is in a floating state during a crushing
operation, with the double nuts 92 being fastened. When the outlet
clearance is to be adjusted, the double nuts 92 and 92 are loosened
to extend the oil hydraulic cylinder 90 and the thickness of the
clearance adjustment shim 36 is adjusted to determine the position
of the toggle block 30. Next, the oil hydraulic cylinder 90 is contracted
to bring the toggle block 30 the clearance adjustment shim 36 and
the toggle block frame 32 into close contact with each other to
be in a floating state, and thereafter the double nuts,92 and 92
are fastened.
However, in the aforementioned conventional structures, the following
disadvantages exist.
(a) In the first example, all the large thrust forces applied to
the toggle plate 13 during a crushing operation is applied to the
hydraulic mechanical lock device 62 and the oil hydraulic cylinder
64. Consequently, the hydraulic mechanical lock device 62 and the
oil hydraulic cylinder 64 with large capacity are required, thus
increasing the apparatus in size, whereby the cost becomes high.
(b) In the second example, the upper oil hydraulic cylinder 76
in the vertical direction is required, and it is necessary to loosen
the bolt 77 and extend the upper oil hydraulic cylinder 76 every
time the outlet clearance is adjusted and it is necessary to contract
the upper oil hydraulic cylinder 76 again and fasten the bolts 77
after the adjustment is finished, thus requiring a long time for
adjustment. In addition, the number of components are large, and
the cost is high with the complicated structure.
(c) In the third example, as shown in the side view in FIG. 10
and the oil hydraulic circuit diagram in FIG. 12 when a clearance
exists in the clearance adjustment shim 36 all the thrust forces
applied to the toggle block 30 is applied to the bottom side of
the oil hydraulic cylinder 80. Consequently, if a mistake is made
in operating the operation lever 57 at the time of the clearance
adjustment and a clearance exists in the portion into which the
clearance adjustment shim 36 is inserted, there is the fear that
a bottom side pipeline 88 of the oil hydraulic cylinder 80 is broken
when a large thrust force is applied to the toggle block 30.
(d) In the fourth example, the tension rods 91 and 91 and the
double nuts 92 and 92 are provided for fixing the position of the
toggle block 30. As a result, each time when the clearance is adjusted,
the operation of loosening the double nuts 92 and 92 and fastening
them again after the adjustment is required, thus requiring a long
working time. The working time reaches, for example, thirty minutes
or more.
SUMMARY OF THE INVENTION
The present invention is made in view of the aforementioned disadvantages,
and its object is to provide an outlet clearance adjustment mechanism
of a jaw crusher, which is compact, simple in structure, without
the fear of breakage, and capable of reduce outlet clearance adjusting
time, and a self-propelled crushing machine loaded with a jaw crusher
having the outlet clearance adjustment mechanism.
In order to attain the aforementioned object, an outlet clearance
adjustment apparatus of a jaw crusher according to the present invention
includes a stationary jaw mounted to a frame, a movable jaw which
faces the stationary jaw and swingingly moves, a toggle block placed
at a back of the movable jaw and abutting the movable jaw via a
toggle block plate, and a toggle block frame fixedly provided at
the frame and supporting the toggle block, and has a constitution
in that the toggle block has a downward inclined plane with a lower
portion being protruded on a face at an opposite side to the toggle
plate, the toggle block frame has a mounting surface on which the
toggle block having the downward inclined plane is slidably mounted,
and an inclined plane provided to oppose the downward inclined plane,
and the outlet clearance adjustment mechanism includes a detachable
clearance adjustment shim provided between the downward inclined
plane and the inclined plane opposing each other, and a hydraulic
type of mechanical lock cylinder provided at a back side of the
inclined plane of the toggle block frame, and adjusts an outlet
clearance between the stationary jaw and the movable jaw.
According to the above constitution, the downward inclined plane
is provided on the toggle block to be fitted onto the inclined plane
of the frame, and therefore when thrust force is applied to the
toggle block, downward force occurs to the toggle block. Thus, a
vertical hydraulic cylinder is not necessary, thus making the structure
simple. Further, since the inclined plane of the frame receives
thrust force, the capacity of the hydraulic type of mechanical lock
cylinder may be small, thus making it possible to reduce the apparatus
in size. Even if the clearance adjustment shim portion has a clearance
at the time of adjustment, the hydraulic type of mechanical lock
cylinder slides to cause the inclined plane to abut it, and thus
there is no fear of breakage. Further, since the outlet clearance
adjustment can be performed only by extending and contracting the
hydraulic type of mechanical lock cylinder, the operation is simple
and adjusting time is short, which is efficient.
Further, a self-propelled crushing machine loaded with a jaw crusher
having the outlet clearance adjustment mechanism of the jaw crusher
according to the present invention has a constitution in which a
jaw crusher having the outlet clearance adjustment mechanism of
the jaw crusher of the aforementioned constitution is mounted on
a self-propelled vehicle.
According to the above constitution, the jaw crusher having the
outlet clearance adjustment mechanism of the present invention is
movable, whereby the operation can be performed in the sites where
it is required, thus enhancing efficiency.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a partially sectional side view of an outlet clearance
adjustment mechanism of the present invention;
FIG. 2 is a view seen from the arrows 2--2 in FIG. 1;
FIG. 3 is a view seen from the arrows 3--3 in FIG. 2;
FIG. 4 is a sectional side view of a hydraulic type of mechanical
lock cylinder according to the present invention;
FIG. 5 is an explanatory view of an operation of the hydraulic
type of mechanical lock cylinder according to the present invention;
FIG. 6 is a hydraulic circuit diagram of the outlet clearance adjustment
mechanism of the present invention;
FIG. 7 is a partially sectional side view of a conventional self-propelled
jaw crusher;
FIG. 8 is a sectional side view of a conventional outlet clearance
adjustment mechanism being a first example;
FIG. 9 is a sectional side view of a conventional outlet clearance
adjustment mechanism being a second example;
FIG. 10 is a sectional side view of a conventional outlet clearance
adjustment mechanism being a third example;
FIG. 11 is a view seen from the arrows 11--11 in FIG. 10;
FIG. 12 is a hydraulic circuit diagram of the conventional outlet
clearance adjustment mechanism being the third example; and
FIG. 13 is a plane view of a conventional outlet clearance adjustment
mechanism being a fourth example.
BEST MODE FOR CARRYING OUT THE INVENTION
A preferred embodiment of an outlet clearance adjustment mechanism
of a jaw crusher and a self-propelled crushing machine loaded with
a jaw crusher having the outlet clearance adjustment mechanism according
to the present invention will be explained in detail below with
reference to the drawings.
FIG. 1 is a side view showing an example of the outlet clearance
adjustment mechanism of the present invention, and FIG. 2 is a view
seen from the arrows 2--2 in FIG. 1. In FIG. 1 and FIG. 2 a stationary
jaw 11 is mounted to a frame 7 of a jaw crusher 10 and a movable
jaw 12 is swingably attached to face it by an eccentric shaft 16.
A toggle block frame 32 is fixedly provided at the frame 7 at a
back side of the movable jaw 12 to slidably support a toggle block
30. A tip end portion of a toggle plate 13 abuts a first abutment
portion 14 provided at a lower end portion of a back of the movable
jaw 12 and a rear end portion of the toggle plate 13 abuts a second
abutment portion 15 provided at a front of the toggle block 30.
A downward inclined plane 31 with a lower portion being protruded
is formed on a rear face of the toggle block 30. The toggle block
frame 32 forms a V-shaped opening 35 by a mounting surface 33 for
mounting the toggle block 30 thereon slidably toward the back of
the movable jaw 12 and an inclined plane 34 matching the downward
inclined plane 31 of the toggle block 30 which is provided on a
surface facing the toggle block 30. A clearance adjustment shim
36 is inserted between the downward inclined plane 31 and the inclined
plane 34. A pair of hydraulic type of mechanical lock cylinders
40 and 40 are attached at a back side of the inclined plane 34 of
the toggle block frame 32. Pre-tension devices 20 and 20 for biasing
a lower end portion of the movable jaw 12 toward the toggle block
30 all the time are provided at both sides of the hydraulic type
of mechanical lock cylinders 40 and 40.
As shown in FIG. 2 the pre-tension device 20 includes a spring
23 abutting a bracket 21 fixedly provided at the toggle block 30
a washer 24 abutting a rear end portion of the spring 23 a rod
22 connected to a lower portion of the movable jaw 12 at one end
and penetrating through the aforementioned spring 23 and the washer
24 at the other end, and a nut 25 for fastening the rod 22 to the
washer 24. As shown in FIG. 3 being a view seen from the arrows
3--3 in FIG. 2 a piston rod 41 of the hydraulic type of mechanical
lock cylinder 40 is connected to the toggle block 30 by a connecting
pin 42.
FIG. 4 is a sectional view of the hydraulic type of mechanical
lock cylinder 40. A piston 44 having the piston rod 41 is press-fitted
in the cylinder 43. The piston rod 41 is provided with an oil hole
45 which is communicated with an outside surface of the piston
44. FIG. 4 shows a state in which pressure oil is not supplied into
the oil hole 45 from the outside, and in this state, the piston
44 is fixed in the position with frictional resistance between the
piston 44 and the cylinder 43. When the hydraulic type of mechanical
lock cylinder 40 is to be extended and contracted, the pressure
oil is supplied into the oil hole 45 to expand the cylinder 43 on
the outer surface portion of the piston 44 as a portion P to thereby
expand the inner diameter as shown in FIG. 5. This expansion reduces
the frictional resistance between the piston 44 and the cylinder
43 to reduce the press fit force of the piston 44 whereby pressure
oil is supplied into a cylinder head chamber 46 or a cylinder bottom
chamber 47 to allow the piston 44 to move.
FIG. 6 is an oil hydraulic circuit diagram of the outlet clearance
adjustment mechanism of the present invention. In FIG. 6 a first
electromagnetic change-over valve 52 is provided on a piston circuit
51 connecting the oil hole 45 of the piston rod 41 of the hydraulic
type of mechanical lock cylinder 40 and a first oil pressure source
50. A second electromagnetic change-over valve 56 is provided on
a head circuit 54 and a bottom circuit 55 for connecting the hydraulic
type of mechanical lock cylinder 40 and a second oil pressure source
53. The first electromagnetic change-over valve 52 has two positions
a and b. In the position a, the piston circuit 51 is connected to
a tank 59 and in the position b, it is connected to a discharge
circuit of the first oil pressure source 50. The second electromagnetic
valve 56 has three positions c, d and e. In the position c, the
head circuit 54 is connected to the second oil pressure source 53
in the position d, the head circuit 54 and the bottom circuit 55
are connected to the tank 59 and in the position e, the bottom
circuit 55 is connected to the second oil pressure source 50. An
operation lever 57 connects to the first electromagnetic change-over
valve 52 and the second electromagnetic change-over valve 56 via
a controller 58.
Next, an operation will be explained. During a crushing operation,
the downward inclined plane 31 abuts the inclined plane 34 of the
toggle block frame 32 via the clearance adjustment shim 36. The
hydraulic type of mechanical lock cylinder 40 is in a state in which
it is locked. Accordingly, the toggle block frame 32 receives large
thrust force from the movable jaw 12 and rattling in a longitudinal
direction of the toggle block 30 is prevented by the hydraulic type
of mechanical lock cylinder 40. When the outlet clearance is to
be adjusted, the operation lever 57 is operated to output a control
signal to the first electromagnetic change-over valve 52 from the
controller 58 to switch the first electromagnetic change-over valve
52 to the position b, whereby pressure oil is supplied to the piston
44 of the hydraulic type of mechanical lock cylinder 40 via the
piston circuit 51 to expand the cylinder 43. Next, the operation
lever 57 is operated to output the control signal to the second
electromagnetic valve 56 from the controller 58 to switch it to
the position e, whereby the pressure oil is supplied to the bottom
circuit 55 to extend the hydraulic type of mechanical lock cylinder
40. Subsequently, the thickness of the clearance adjustment shim
36 is adjusted to thereby adjust the outlet clearance. Next, the
operation lever 57 is operated to switch the second electromagnetic
change-over valve 56 to the position c, whereby the pressure oil
is supplied to the head circuit 54 to contract the hydraulic type
of mechanical lock cylinder 40 to thereby bring the toggle block
30 the clearance adjustment shim 36 and the inclined plane 34
of the toggle block frame 32 in close contact with each other. Next,
the first electromagnetic change-over valve 52 is switched to the
position a, whereby the clearance adjustment operation is finished.
The clearance adjustment operation is simple as described above,
and the operating time is only about three minutes by a person,
which is sharp reduction in the operating time as compared with
the aforementioned 30 minutes cited as an example of the prior arts.
Since the head circuit 54 and the bottom circuit 55 of the hydraulic
type of mechanical lock cylinder 40 are connected to a drain circuit
during the crushing operation, abnormal oil pressure does not occur
to the head circuit 54 and the bottom circuit 55 thus eliminating
the fear of breakage. Further, the hydraulic type of mechanical
lock cylinder 40 is used only for preventing the toggle block 30
from rattling and for moving the toggle block 30 on the occasion
of outlet clearance adjustment, and therefore a small-sized cylinder
is sufficient, thus making it possible to reduce the size and cost
of the apparatus.
In the above, the embodiment of the outlet clearance adjustment
mechanism of the jaw crusher is explained, and it is useful to mount
a jaw crusher having the outlet clearance adjustment mechanism of
the embodiment according to the above described present invention
and use it as the self-propelled crushing machine. Here, as the
self-propelled vehicle, any ordinary self-propelled vehicle may
be suitable. As a result of the above, it becomes movable, whereby
operation in the sites where it is required becomes possible, thus
enhancing efficiency. As a concrete example of the self-propelled
crushing machine, it may be suitable to mount the jaw crusher 10
having the outlet clearance adjustment mechanism of the above-described
embodiment according to the present invention in place of the conventional
jaw crusher 10 in the self-propelled jaw crusher 1 shown in FIG.
7.
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