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Патент USA US3100635

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Aug. 13, 1963
Filed Dec. 9, 1960
2 Sheets-Sheet J.
Aug. 13, 1963
Filed Dec. 9, 1960 Y
2 Sheeis-Sheet 2
United States Patent 0
Patented Aug. 13, 1963
Fritz Kiimmel, Esslingen, Germany, assignor to
Delmag-Maschinenfabrik Reinhold Dornfeld, Ess
lingen (Neckar), Germany
Filed Dec. 9, 1960, Ser. No. 74,870
Claims priority, application Germany Dec. 24, 1959
3 Claims. (Cl. 262-45)
‘frame, the advantage is obtained that with a su?icient
length of the guiding frame, the ram can work above
the water surface while the chisel, which is su?ciently
long in conformity with the water depth, nevertheless
will be so guided that due to the double guiding of the
chisel in the guiding frame, the heavy blows of the ram
will cause no harmful reaction upon the ram itself.
In connection with this arrangement it is advantageous
to provide the common guiding frame for separate guid
The present invention relates to a breaker and, more 10 ing paths for said ram and said chisel respectively.
speci?cally, concerns a rock breaker which operates in
suspended condition and comprises an impact device and
a chisel.
The chisel may be guided in a dual way and may be
made correspondingly long. By suspending the guiding
‘frame on correspondingly designed suspension means
With heretofore known rock breakers of the general
known per se, it will be possible also with ‘the arrange
type outlined above, the impact device is suspended and 15 ment according to the invention, very precisely to guide
operates at high impact speed but with a relatively low
the entire guiding frame and thereby also the chisel.
impact energy. The chisel is ‘guided in the impact device
A ‘further advantage of the common ‘guiding frame
It is for this reason that in most instances only
relatively short chisels may be employed. However,
when the rock has to be broken at a greater water depth,
the impact device operates ‘for the most time under water.
This causes considerable complications.
Inasmuch as a
special guide for the chisel is lacking, it is di?icult to set
the same precisely at the desired impact point. This in
consists in that, when breaking the rock by laterally tilt
ing the entire chisel, the bending moments will be ab
sorbed by the guiding ‘frame. In this Way, the chisel
will be relieved, and the impact device will be kept free
from these forces.
Referring now to the drawings
detail, the arrange
ment shown in FIGS. 1 and 2 comprises a pontoon-like
turn frequently results in an insu?icien-t effect of the 25 ship 10 having mounted thereon rails 11 ‘for a carriage
chiseling operation.
It is, therefore, an object of the present invention to
provide a rock breaker or impact device which will over
come the above mentioned drawbacks.
12 of a movable crane structure 13.
This crane structure
13 is equipped with a boom 14 having a rock breaking
‘device suspended thereon in the ‘following manner. A
cable 16 adapted to be wound on and off from a winch
It is another object of this invention to provide a. rock 30 15 is guided over rollers 17 and 18 to a free roller 19v at
breaker or impact device which will permit a proper guid
the upper end of the guiding frame ~20 of the rock
ing of the chisel to thereby assure that the chisel will at
breaker. From here the cable 16 passes to transversely
tack the“ rock to be broken at the desired point.
arranged free rollers 21, 22 .(see FIG. 2) at the end of
It is a further object of this invention to provide a rock
the‘ boom 14 from where the cable is passed to a second
breaker or impact device in which after the rock has 35 roller 23 at the end of the guiding frame 20‘. The cable
been broken, the chisel will be relieved from any undue
then passes over roller 23 to a ?xed suspension point
forces, especially bending moments.
24 at the end of the boom 14. As will furthermore be
These and other objects and advantages of the in
evident from the drawings, the cable 26 pertaining to a
vention will appear more clearly from the following
40 winch 25 ‘is guided over a roller 27 at the end of boom
speci?cation in connection with the accompanying draw
ings, in which:
14 {and a roller 28 on a starting device 29 guided on
frame 20, to a ?xed suspension point and serves merely
FIG. 1 illustrates a rock breaker according to the
for adjusting said starting device as to height for start
present invention, which is suspended on a boom sup
the internal combustion operated ram. Inasmuch as
ported by a ?oat.
45 said starting device does not form a part of the present
FIG. 1a is a sectional view taken on line »1a-—1a of
invention, no further details thereof appear to be neces
FIG. 1.
FIG. 2 is a front view of FIG. 1 :as seen in the direc
tion of the arrow A.
FIG. 3 is a section through the lower bearing means 50
for the chisel, said section being taken along the line
III-III of FIG. 2.
FIG. 4 illustrates a section similar to that of FIG. 3
The guiding frame 20 comprises substantially two guid
ing tubes 30 and an» additional stiffening tube 3-1. The
said three tubes 30 and 31 are ?xedly interconnected by
an upper transverse member 32 and a lower transverse
member 33 and together form the guiding frame. Be~
tween the said two transverse members 32 and 33 there
but through a modi?ed bearing arrangement.
are arranged two guiding bars 34 for guiding the above
FIG. 5 illustrates in section still another modi?cation 55 mentioned starting device ‘29 and above all the ram 35.
of the lower bearing arrangement for the chisel.
The device 29 and ram 35 have portions slidably en
FIGS. ‘6 to 8 represent sections similar to those of
gaging bars 34, and the said bars are spaced ‘from but
FIGS. 3 to 5, however, with the difference that the hear
parallel to tubes 30, as will be seen in FIG. La.
ing is a split bearing one portion of which is hinged to a
For purposes of guiding the chisel 36, the guiding tubes
stationary portion so- that it may selectively be opened. 60 30 have a lower extension thereof provided with a trans
The above mentioned objects have been realized by the
verse member composed of two plates or arms '37. In
impact device according to the present invention which is
addition thereto, the upper end of chisel 36 is guided
characterized in that the impact device is designed as ram
by an impact hood 38. placed over the upper end of
and together with the chisel is guided by a guiding frame
chisel 36 vand mounted on the guiding tubes 30‘ which
common thereto while said chisel is guided separately 65 are partially embraced by said impact hood. The ram
from said ram. While such impact devices according
35 is located on the said impact hood 38.
to this design cannot work under water, this is of no
The design of the chisel guide on the transverse mem
importance when a correspondingly long chisel is em
ber formed by plates 37 is shown in diiferent modi?ca
ployed and guided accordingly. In this instance also a
tions in FIGS. 3 to '8. These ?gures show the lower
rock breaker under water even at great water depth is 70 one of the plates 37 the end portions of which have
mounted therein the guiding tubes 30. According to the
By guiding the rain and the chisel in a common guiding
embodiment of FIG. 3, the chisel is guided by a metal
guiding ‘bushing 39 'which is ?xedly mounted in a corre
sponding bore 37a.
According to the embodiment of ‘FIG. 4, the ?xed me
tallic bushing 39 of FIG. 3 is replaced by a transversely
elastic bushing '40, which may be composed ‘for instance 5
of two bushings with elastic material interposed there.
likewise supported by said frame and operable to exert
an impact upon said chisel means, ?rst guiding means
mounted on said frame for guiding said chisel means,
said guiding means including a bushing guidingly sur
rounding a portion of said chisel means, and laterally
resilient means interposed between said bushing and the
adjacent portion of said frame and resilient in a direc
tion transverse to the longitudinal axis of said bushing,
According to the embodiment of FIG. 5, a separate
and second guiding, means supported by said frame but .
metallic guiding bushing 41 is connected or welded to
the edges of plates 37 through the intervention of. a 10 separate from said ?rst guiding means for guiding said
ram means independently of said chisel means.
rubber elastic intermediate member l42 provided with
metallic end plates.
2. In a rock breaker: frame means including transverse
arm means, rock breaking chisel means reciprocably sup
The last mentioned arrangement of a guiding bushing
ported by said ‘frame means, ram means likewise sup
at the edges of, the plates 37 may be modi?ed in con
tormity ‘With FIGS. 6 to 8 in such a way that this bushing 15 ported by said, frame means and operable to exert an
impact upon said chisel means, ?rst guiding means for
is designed as hingedike bearing box. According to the
guiding said ram means, second guiding means inde
embodiment of FIG. '6, the guiding bushing is made up
pendent of said ?rst guiding means for guiding said
of the two bearing box sections 43 and 44. According
chisel means, and laterally resilient means connecting said
to the embodiment ‘of FIG. 7, these sections 43‘ and 44
second guiding means to said transverse arm means.
also comprise a radially yieldable inner bushing {45 similar
3. In a rock breaker: ‘a frame, rock breaking chisel
to said bushing 40. Finally, according to the embodi
means reciprocably sup-ported by said frame, ram means
ment of FIG. 8, the bearing box section ‘43 is connected
likewise supported by ‘said .frame and operable to exert
to plates 37 by means of an elastic intermediate mem
an, impact upon said chisel means, ?rst guiding means
ber 42 according to FIG. 5,".
When employing the above mentioned elastic guiding 25 mounted upon said frame for guiding said chisel means,
second guiding mean-s supported by said \frame but sep
bushing and elastic intermediate members, the elastic ma
arate from said ?rst guiding means for guiding said ram
terial may consist of rubber or rubber material or also of
means independently of said chisel means, said ?rst guid
wood, special springs, or any other yieldable material.
ing means including bearing means embracing said chisel
Such elastic material must, however, have su?icient elas
ticity in order to be'able to absorb or at least cushion 30 means and comprising portions hingedly interconnected
to permit opening of the said bearing means cfor lateral
the recoil or vibrations occurring during the lateral stress
insertion and removal of said chisel means, and laterally
of the chisel, before said recoil or vibrations are con
tveyed through transverse members 37 to the guiding
frame 20.
It is, of course, to be understood that the present in 35
vention is, by no means, limited to the particular con
resilient means interposed between said frame and said
?rst guiding means.
References Cited in the ?le of this patent
struction shown in the drawings but also comprises any
modi?cations within the scope of the appended claims.
What I claim is:
4 O 1,945,322
1. In a rock breaker: a vframe, rock breaking chisel
means reciprocably supported by said frame, ram means
Simonson ____________ __ Aug. 18,
Cover et al _____________ __ Oct. 4,
Lafayette ____________ .__ Jan. 30,
Booth ______________ __ Mar. 22,
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