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Патент USA US2116708

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May 10, 1938.
'
R; A. NIEKAMP
-
APPARATUS FOR COMPACTING CONCRETE ÄND THE LIKE
Filed Jan. 1l, 1936
2,115,708
Patented May IÓ, 1938
2,il6,708
lUNITED STATES
PATENT OFFICE
2,116,708
AVPPARATUS FOR COMPÀCTING CONCRETE
AND THE LIKE
Richard A. Ñ-iekamp, Dayton, Ohio, assignor to
The Master Electric Company, Dayton, Ohio, a
corporation of Ohio
Application january' 11, 193s, serial No. 58,784
4 claims. (ci. 259-72)
This invention relates generally to apparatus eilîect, form a single section since they are rigidly
bolted together by the bolts 6.
for compacting concrete or other plastic ma
terial, and more particularly to a vibrator adapted
to be submerged in the material and vibrated
so as to compact it.
T_he invention provides a means for vibrating
and compacting concrete so as to produce a dense
strong product which is homogeneous in charac
ter~ from a mix in which the proportion of water
10 to concrete is relatively small.
In the accompanying drawing which illustrates
two embodiments of my invention,
Figure 1 is a longitudinal vertical section
through a vibrator;
»
'
Figure 2y is an enlarged vertical section of a
portion of the apparatus shown in> Figure 1;
and
,
'
The intermediate and lower casing sections are
provided with vanes I9 extending outwardly from
the body portions of the sections. In the em
bodiment shown, the vibrator has four of these
vanes, but this number may be varied if desired.
The vanes I9 at the portions adjacent the flanges
'I and 8 are of substantially the same width as
the flanges. The width of the ilanges, however,
decreases in a direction upwardly from the flange
8 so as to provide a reduced or neck .portion 20
of a diameter substantially equal lto the diameter
of the body portion of the intermediate section 4.
The width of the flanges then increases so that 15
in the region of the flange I2 at the upper end
of the intermediate casing section, the vanes I9
Figure l3 is a longitudinal vertical section
through another embodiment of the invention,
are of substantiallyv the same width as the flange
parts’being broken away.A
compacting action on the concrete. The reduced 20
or neck portion 20 provided on the vibrator by
narrowing or eliminating the vanes I9 at that
portion enables the concrete to close in about the
vibrator at the neck portion so that vibration is
Referring more particularly to the embodi
ment illustrated in Figures 1 and 2, the vibrator
has a casing indicated generally by the reference
nume-ral 2. The casing is formed of an upper
section 3, an intermediate section 4, and a lower
section 5. 'I'he lower section is connected to the
intermediate section by bolts 6 extending through
llanges 'I and 8 formed on the sections 5 and 4,
respectively. Sealing material 9 is placed be
tween the ilanges to prevent leakage of cement
into the hollow'interior of the vibrator.
The lower portion of the upper casing section
3 is formed with an annular groove I0 and an
outwardly extending flange II. The upper end
of the intermediate section 4 is provided with an
outwardly extending ilangel I2. The ilanges II
and I2 are spaced apart by an annular washer
I3 of rubber or other resilient material. Bolts I4
extend through the flanges II and I2, and a
rubber washer I5 is inserted around each of the
bolts between the flange' I2 and a metallic washer
I6. Surrounding each of the bolts is a non
Q resilient metallic spacing sleeve Il which contacts
with the flange II and the washer I6. The open
ings I8 in the flange I2, through which the bolts
I2.
The vanes I9 increase the eiliciency of the
imparted to the concrete radially in all directions, 25
that is, laterally, downwardly and upwardly,
thereby increasing the effectiveness of the vi
brating action.
An electric motor indicated generally by the
reference numeral 24 is located in the upper cas 30
ing section 3. The stator 25 of the motor lits
tightly Within the casing section 3 and rests on
an inwardly extending flange 26. Electric cur
rent is supplied to the windings 2`I- of the stator
by means of a flexible conduit 28 which extends 35
upwardly through a head 29 and through a cou
pling section 30 to which a flexible hose, not `
shown, may be connected. The flexible hose is
provided with a handle which may be grasped by
the operator, the ilexible hose further decreasing 40
any transmission of vibration to the hands of the
operator. The conduit 28 extends through the
flexible hose to a source of electric current. Seal
ing means 3| is provided in the head 29 for pre
venting inleakage of concrete.
.
'I‘he drive shaft 32 of the motor armature 33 Ais
and spacing sleeves extend, are somewhat larger ì mounted in ball bearings 34 and 35 supported,
than the diameter of the spacing sleeves so as
to leave a space between the sleeves and the
flange. This enables the intermediate section 4
respectively, in heads 29 and 35a, the motor,
bearings and electrical conductor 28 all being
located in the upper casing section 3. The motor
and the vlower section 5 of the casing to vibrate ' or driving shaft 32 is connected to a driven or
a ‘limited amount relative to the upper casing eccentric shaft 34 by means of a flexible driving
section 3 without causing vibration in the upper connection 38. In the embodiment shown in
section which contains the driving motor. The Figures 1 and 2, this flexible driving connection
intermediate section 4 and the lower section 5, in is made of rubber and is provided with recesses
45
2
2,116,708
31 and 38 for receiving the shafts 32 and 34,
respectively. Each of the shafts is provided with
splines 39 and the shafts are molded into the
ñexible coupling.
This provides a flexible re
silient dn'ving connection between the drive shaft
preventing the vibration from'being transmitted
from one section tothe other. It has been found
to materially increase the life of the vibrating
apparatus.
In the embodiment illustrated in Figure 3, I
and the eccentric shaft.
~
„
have shown the eccentric shaft 51 in an offset
A weight 40 is mounted eccentrically on the position relative to the drive shaft 54. This ar
shaft 34 so that upon rotation of the shaft the- rangement increases the vibration of the lower
weight causes vibration of the casing sections 4 casing section. The offset arrangement of the
10 and 5 relative to the upper casing section 3. The eccentric shaft with respect to the drive shaft
eccentric shaft 34 is mounted in roller bearings may be employed not only with the internal gear 10
Il and 42 carried by heads 43 and 44, respec
tively.
.
When the driving motor is operated, the shafts
15 32 and 34 are rotated, causing rotation of the
eccentric weight 40. 'I’his causes the casing sec
» tions 4 and 5 to vibrate in a circle relative to
the upper casing section 3, this vibration being
l permitted due to the resilient connection be
tween the casing sections 3 and 4. The vibration
is transmitted radially in all directions .due to
the shape of the vanes I8.- ‘I‘he resilient cou
pling and sealing means between the casing sec
tions 3 and 4 prevents vibration being- transmit
ted to the upper section which contains the mo
tor and motor bearings andlalso prevents vibra
_tion from being transmitted to the operator.
'I?‘he embodiment illustrated in Figure 3 is, gen
erally speaking, similar to> that just described,
except that instead of employing a resilient driv
ing connection between the driving shaft and ec
centric shaft, an internal gear- and pinion is
employed. Also, in the embodiment shown in
Figure 3, the eccentric or driven shaft is located
so as to be oil'set or out of alinement with the
driveshaft. Referring vto Figure 3, the casing is
and pinion driving connection illustrated in Fig
ure 3, but may be employed also in connection
with- the resilient driving connection 36 illus
trated in Figure l. In-this case the recesses 31 15
rvand >38 provided in the rubber coupling 38 are
offset to receive the drive shaft and driven shaft.
I have illustrated and described two embodi
ments .of my invention. It is to be understood,
however, that the invention may be otherwise
embodied within the scope of the following claims.
I claim;
1. Apparatus for compacting concrete and the
like, comprising a casing formed of a plurality
of sections, resilient coupling means connecting
the sections together, a motor having a drive
shaft and bearings therefor all located in one sec
tion, an eccentric shaft, bearings therefor and
an eccentric weight associated with the eccentric
shaft all located in another- section, and a yield 30
ing driving connection between the drive shaft
and the eccentric shaft, the drive shaft and
eccentric shaft being out of alinement with each
other.
'
`
2. Apparatus for compacting concrete and the
like, comprising a casing formed of a plurality
formed of an upper sertion 50, an intermediate
section 5l and a lower section 52. The sections
50 and 5| are connected together by resilient
couplingL and sealing means 53 similar toI that
previously described so as to allow relative vibra
tion between the .two sections of the casing.
An internal gear 54a is secured to the lower
end of the drive shaft 54. A pinion 55 located
inside of the gear 54a and meshing with the teeth
56 of the gear is secured to the upper endV of a
driven or eccentric shaft 51. 'I'he eccentric shaft
of sections, resilient coupling means connecting '
the sections together, a motor having a drive
shaft and bearings therefor all located in one
section, Aan eccentric shaft, bearings therefor and 40
an eccentric weight associated with the eccentric
shaft all located in another section, and an in
terna] gear and pinion driving connection be
tween the drive shaft and eccentric shaft,` the
drive shaftv and eccentric shaft being -out of 45
is mounted in roller bearings 53 and 59, and se
cured te the shaft intermediate these bearings
like, comprising a casing formed of a plurality
of sections having spaced apart flanges on their
adjacent ends, resilient sealing means between the
is an eccentric weight 6I. Rotation of the eccen
tric weight causes vibration of the casing sec
tions 5i and 52 relative to the upper casing sec
tion 5l, as in the embodiment previously de
scribed. The pinion 55 tits loosely in the internal
gear 54a so as' to allow for this relative vibration
of the casing sections and still provide a flexible
driving connection for the eccentric- weight.
'I'he formation of the casing in a plurality of
sections provides ready access to the operating
mechanism located within the casing. -It has
been found that'where the casing is made ina
plurality ci' sections rigidly connected together
by bolts without the use of a _resilient connec
` tion between the sections, the vibration is trans
65 mitted from the lower to the upper section, rap
idly wearing out the bolts and 'causing the sec
tions to fall apart or at least' to allow leakagel
of cement into the interior. The resilient cou
pling and sealing means, particularly when em
70 ployed in connection with the non-resilient spac->
alinement with each other.
3. Apparatus for compacting concrete and the
flanges, bolts extending through the flanges and
sealing means and connecting the sections to
gether in such manner as to allow relative move
ment between the sections, non-resilient spac
ing sleeves surrounding the bolts, and means in-> 55
side the casing for causing vibration of the diner
ent sections relative to each other.
of sections, said casing adapted to be submerged
in the concrete. resilient coupling means con
necting the sections together, a motor having a
drive shaft and bearings therefor, all located in
one section, an eccentric shaft, bearings therefor
andan eccentric weight associated with the ec
centric shaft, all located in another section, a
yielding driving connection between the drive
shaft and the eccentric shaft, and i‘lexible sup
porting means connected to the casing whereby
the section of the casingcontaining the motor
ing sleeves surrounding the bolts, provides an _ may be submerged in the concrete.
effective arrangement for- allowing limited rela
tive vibration between the casing sections and
'
4. Apparatus for compacting concrete and the
like, comprising aV casing formed of a plurality
' '
RICHARDA. NEKAMP.
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