NZ615636B - Mixer drum driving device - Google Patents
Mixer drum driving device Download PDFInfo
- Publication number
- NZ615636B NZ615636B NZ615636A NZ61563612A NZ615636B NZ 615636 B NZ615636 B NZ 615636B NZ 615636 A NZ615636 A NZ 615636A NZ 61563612 A NZ61563612 A NZ 61563612A NZ 615636 B NZ615636 B NZ 615636B
- Authority
- NZ
- New Zealand
- Prior art keywords
- mixer drum
- mixer
- drum
- motor
- rotate
- Prior art date
Links
- 238000004642 transportation engineering Methods 0.000 description 15
- 239000000446 fuel Substances 0.000 description 5
- 230000002093 peripheral Effects 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 230000032258 transport Effects 0.000 description 2
- 229910020019 S1 Can Inorganic materials 0.000 description 1
- 230000002457 bidirectional Effects 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000003247 decreasing Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006011 modification reaction Methods 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 238000009987 spinning Methods 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
Classifications
-
- B01F9/02—
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28C5/00—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions
- B28C5/08—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions using driven mechanical means affecting the mixing
- B28C5/18—Mixing in containers to which motion is imparted to effect the mixing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28C5/00—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions
- B28C5/42—Apparatus specially adapted for being mounted on vehicles with provision for mixing during transport
- B28C5/4203—Details; Accessories
- B28C5/4206—Control apparatus; Drive systems, e.g. coupled to the vehicle drive-system
- B28C5/421—Drives
- B28C5/4217—Drives in combination with drum mountings; Drives directly coupled to the axis of rotating drums
Abstract
615636 Disclosed is a mixer drum driving apparatus (S). The present mixer drum driving apparatus (S) utilises a motor (3) mounted on the rear of a frame (C) in place of a conventional driving apparatus which uses a vehicle engine. The mixer drum driving apparatus (S) comprises a mixer drum (M) and a drive source (D). The mixer drum (M) is carried on a frame (C) of a mixer truck in a frontward tilted condition to be free to rotate. The drive source (D) is configured to drive the mixer drum (M) to rotate. The drive source (D) comprises a motor (3) which is disposed in a space between a rear portion of the mixer drum (M) and a rear portion of the frame (C) in order to drive the mixer drum (M) to rotate. d a drive source (D). The mixer drum (M) is carried on a frame (C) of a mixer truck in a frontward tilted condition to be free to rotate. The drive source (D) is configured to drive the mixer drum (M) to rotate. The drive source (D) comprises a motor (3) which is disposed in a space between a rear portion of the mixer drum (M) and a rear portion of the frame (C) in order to drive the mixer drum (M) to rotate.
Description
GS10450 / PCT-771
DESCRIPTION
MIXER DRUM DRIVING APPARATUS
TECHNICAL FIELD
The present invention relates to a mixer drum driving
apparatus that drives a mixer drum of a mixer truck.
BACKGROUND ART
A concrete mixer truck is a vehicle that transports fresh
concrete such as mortar or ready-mixed concrete from a fresh
concrete factory to a construction site in a mixer drum that is
carried on a frame to be free to rotate.
To prevent the fresh concrete from decreasing in quality
and hardening, the mixer drum is rotated normally as the
concrete mixer truck transports the fresh concrete such that the
fresh concrete is agitated by a plurality of spiral blades disposed
in the mixer drum. Further, the concrete mixer truck is
configured such that the fresh concrete in the mixer drum can be
discharged by rotating the mixer drum in an opposite direction
to the normal rotation. When the concrete mixer truck arrives
at a concrete pouring site, the mixer drum is rotated in reverse
so that the fresh concrete is supplied to a pouring location.
In this type of concrete mixer truck, the mixer drum
GS10450 / PCT-771
must be rotated constantly until the fresh concrete is discharged.
An engine of the concrete mixer truck is typically used as a drive
source of the mixer drum. More specifically, power from the
engine is transmitted to a hydraulic pump via a PTO (Power Take
Off), whereupon working oil discharged from the hydraulic pump
is supplied to a hydraulic motor. The hydraulic motor is driven
by the working oil, and the mixer drum is driven to rotate by the
rotation of the hydraulic motor.
In a mixer drum driving apparatus that drives a mixer
drum using only an engine, an engine rotation speed must be
increased when the mixer drum is to be rotated at high speed or
the like. When the engine rotation speed is increased in this
manner, noise is generated and fuel consumption increases.
JP2007-278430A discloses a mixer drum driving
apparatus that drives a mixer drum to rotate by driving an
auxiliary hydraulic pump using an electric motor in addition to a
main hydraulic pump driven by an engine.
SUMMARY OF INVENTION
In the mixer drum driving apparatus according to the
related art described above, a single hydraulic motor is driven by
the hydraulic pump driven by the engine and the auxiliary
hydraulic pump driven by the electric motor, and therefore all
GS10450 / PCT-771
parts of the driving apparatus, including the main hydraulic
pump, the auxiliary hydraulic pump, the electric motor, and an
inverter for controlling the motor, must be disposed on the frame
between an operator cab of the concrete mixer truck and the
mixer drum. As a result, space for carrying the mixer drum on
the frame is compressed. When the mixer drum carrying space
is compressed in this manner, a fresh concrete carrying capacity
decreases, leading to a reduction in transportation efficiency.
Further, in the mixer drum driving apparatus according
to the related art, an entire load of the driving apparatus is
applied between the operator cab and the mixer drum, and
therefore a strength of the frame and a chassis frame must be
increased in a disposal position of the driving apparatus. When
the strength of the frame and the chassis frame is increased, a
vehicle weight (a weight of the vehicle alone) of the concrete
mixer truck increases. A maximum carrying capacity of the
fresh concrete carried in the mixer drum takes a value obtained
by subtracting the vehicle weight from a total vehicle weight, and
therefore the maximum fresh concrete carrying capacity
decreases as the vehicle weight of the concrete mixer truck
increases, leading to a reduction in transportation efficiency.
It is therefore an object of this invention to provide a
mixer drum driving apparatus that drives a mixer drum using a
GS10450 / PCT-771
motor without causing a reduction in transportation efficiency.
According to an aspect of the present invention, a mixer
drum driving apparatus includes a mixer drum carried on a
frame of a mixer truck in a frontward tilted condition to be free to
rotate, and a drive source configured to drive the mixer drum to
rotate. The drive source includes a motor which is disposed in
a space between a rear portion of the mixer drum and a rear
portion of the frame in order to drive the mixer drum to rotate.
The details as well as other features and advantages of
this invention are set forth in the remainder of the specification
and are shown in the accompanying drawings.
BRIEF DESCRIPTION OF DRAWINGS
is a schematic view showing a configuration of a
mixer drum driving apparatus according to a first embodiment of
the present invention.
is a side view of a concrete mixer truck carrying the
mixer drum driving apparatus.
is a back view of a mixer drum carried on a frame of
the concrete mixer truck.
is a perspective view showing a mixer drum driving
apparatus according to a modified example of the first
embodiment.
GS10450 / PCT-771
is a schematic view showing a configuration of a
mixer drum driving apparatus according to another modified
example of the first embodiment.
is a schematic view showing a configuration of a
mixer drum driving apparatus according to a second
embodiment of the present invention.
DESCRIPTION OF EMBODIMENTS
A mixer drum driving apparatus according to a first
embodiment of the present invention will be described with
reference to the figures.
As shown in FIGS. 2 and 3, a concrete mixer truck V
includes an operator cab O provided on a vehicle front, and a
frame C provided to the rear of the operator cab O. A leg T is
attached to a rear portion of the frame C, and four drum rollers
R are attached to the leg T to be free to rotate. The drum rollers
R are arranged in series in a vehicle width direction so as to
support a mixer drum M to be free to rotate from a lower side
thereof.
A mixer drum driving apparatus S is an apparatus for
driving the mixer drum M. The mixer drum driving apparatus S
includes the mixer drum M which is carried on the frame C to be
free to rotate, and a drive source D which drives the mixer drum
GS10450 / PCT-771
M to rotate. The drive source D that drives the mixer drum M to
rotate is disposed on the frame C of the concrete mixer truck V.
The mixer drum M is formed in a closed-end cylinder
shape having an open rear end. The mixer drum M is
constituted by a drum shell 1 and a roller ring 2 provided on a
rear side end outer periphery of the drum shell 1. An axial
center portion provided on a front side end of the mixer drum M
(the drum shell 1) is supported by a support portion provided on
the frame C. The roller ring 2 is supported from below by the
four rollers R of the leg T, whereby the mixer drum M is provided
on the frame C to be free to rotate. The mixer drum M is
disposed on the frame C in a frontward tilted attitude such that
the rear side end thereof is lifted upward.
Although not shown in the figures, a plurality of spiral
blades are provided on an inner peripheral surface of the drum
shell 1. When the mixer drum M is rotated normally by the
drive source D, the blades agitate fresh concrete in the mixer
drum M while moving the fresh concrete toward the front side.
When the fresh concrete is introduced into the mixer drum M,
the mixer drum M is rotated normally at a higher speed than
during agitation. When the mixer drum M is rotated in reverse
by the drive source D, on the other hand, the blades move the
fresh concrete in the mixer drum M toward the rear side so that
GS10450 / PCT-771
the fresh concrete can be discharged from the mixer drum M.
As shown in FIGS. 1 and 3, the drive source D is
provided on the frame C in a space between a rear portion of the
mixer drum M in the frontward tilted attitude and the rear
portion of the frame C. The drive source D includes a motor 3,
a reduction gear unit 4 coupled to the motor 3, a sprocket 5
provided on an output shaft 4a of the reduction gear unit 4, a
sprocket 6 provided on a rotary shaft RS of each drum roller R, a
roller chain 7 wound around the sprockets 5, 6, and a power
supply B that supplies power to the motor 3. On the frame C,
rearward of a central position in a front-rear direction serving as
an advancement direction of the concrete mixer truck V
corresponds to the rear portion of the frame C, and respective
constituent members constituting the drive source D are
provided in the rear portion of the frame C. The drive source D
is configured to rotate the motor 3 normally or in reverse such
that the mixer drum M is rotated normally or in reverse via the
drum rollers R.
To apply a predetermined tension to the roller chain 7,
auxiliary sprockets W are provided between the sprocket 5 and a
sprocket 6 and between the respective sprockets 6, 6. The four
auxiliary sprockets W are attached to the leg T to be free to rotate,
similarly to the drum rollers R.
GS10450 / PCT-771
The motor 3 is a rotary electric motor. The motor 3
drives all of the drum rollers R to rotate via the sprockets 5, 6
and the roller chain 7. A belt may be wound around the
sprockets 5, 6 instead of the roller chain 7 to transmit power
from the motor 3 to the drum rollers R. Further, the drive force
of the motor 3 may be transmitted to the drum rollers R using a
plurality of gears instead of a power transmission mechanism
such as the sprockets 5, 6 and the roller chain 7.
In the drive source D, the motor 3 is driven on the basis
of electric power supplied from the power supply B, thereby
causing the four drum rollers R to rotate such that the mixer
drum M is driven to rotate. All of the drum rollers R are driven
to rotate by the motor 3, and therefore, even when slippage
occurs between a part of the drum rollers R and the roller ring 2
of the mixer drum M, the mixer drum M can be driven to rotate
with stability by the other drum rollers R. It should be noted
that only a part of the four drum rollers R may be driven by the
motor 3. In this case, the drum rollers R not driven by the
motor 3 function as support members for supporting the mixer
drum M from below.
The number of disposed drum rollers R is set as desired
according to necessity. The number of disposed drum rollers R
is set at a number such as two or more, for example, so that the
GS10450 / PCT-771
mixer drum M can be supported without being biased to the left
or right relative to the vehicle advancement direction. By
increasing the number of disposed drum rollers R or driving all
of the drum rollers R using the motor 3, a rotation defect in the
mixer drum M due to spinning of the drum rollers R can be
suppressed.
In the drive source D, a reduction ratio between the
motor 3 and the sprocket 5 is adjusted using the reduction gear
unit 4. However, the reduction ratio can also be adjusted in
accordance with the number of teeth of the sprockets 5, 6, and
therefore, when the reduction ratio is set using the sprockets 5,
6, the reduction gear unit 4 need not be provided. Further,
when a torque of the motor 3 is sufficiently large, a speed
reduction mechanism need not be provided between the motor 3
and the drum rollers R.
In the mixer drum driving apparatus S according to the
first embodiment, the motor 3 constituting the drive source D
that drives the mixer drum M is provided in the rear portion of
the frame C, or in other words in the space between the rear
portion of the mixer drum M in the frontward tilted attitude and
the rear portion of the frame C. The drive source D is not
provided between the operator cab O of the concrete mixer truck
V and the mixer drum M, and therefore space for carrying the
GS10450 / PCT-771
mixer drum M can be secured on the frame C. Hence, a capacity
of the mixer drum M is not compressed, and therefore a
sufficient fresh concrete carrying capacity can be secured. As a
result, a reduction in a fresh concrete transportation amount
can be prevented, and the mixer drum M can be driven by the
motor 3 without causing a reduction in transportation efficiency.
Further, since the transportation efficiency is not reduced, a fuel
consumption of the concrete mixer truck V can be reduced.
In the mixer drum driving apparatus S, the mixer drum
M is rotated only by the motor 3 of the drive source D, and
therefore a main hydraulic pump driven by an engine, an
auxiliary hydraulic pump driven by a motor, and so on, such as
those of the mixer drum driving apparatus according to the
related art, are not provided. The mixer drum driving
apparatus S can therefore be reduced in weight in comparison
with the mixer drum driving apparatus according to the related
art. Accordingly, there is no need to increase a strength of a
chassis and the frame C, and therefore a part of the chassis and
the frame C in which the mixer drum driving apparatus S is
disposed can be reduced in weight.
In the mixer drum driving apparatus S, the mixer drum
M is driven to rotate by rotating the drum rollers R using the
motor 3, and therefore an output torque required of the motor 3
GS10450 / PCT-771
is smaller than that of a case in which a front end shaft of the
mixer drum M is driven to rotate, as in the mixer drum driving
apparatus according to the related art. As a result, the motor 3
can be reduced in both size and weight.
In the mixer drum driving apparatus S, the mixer drum
M is rotated using the plurality of drum rollers R, and therefore
unevenness is unlikely to occur in a rotation speed of the mixer
drum M. It should be noted that in this embodiment, the mixer
drum M is driven to rotate by rotating the drum rollers R that
contact the roller ring 2, but instead, the mixer drum M may be
driven to rotate by providing a gear or gears disposed around the
outer peripheral surface of the mixer drum M in the
circumferential direction and transmitting the drive force of the
motor 3 to the gear.
Referring to a mixer drum driving apparatus S1
according to a modified example of the first embodiment will be
described.
In the mixer drum driving apparatus S according to the
first embodiment, the motor 3 is a rotary electric motor, whereas
in the mixer drum driving apparatus S1 according to the
modified example shown in a motor 8 is a linear motor.
The motor 8 serves as the drive source that drives the mixer
drum M to rotate. The motor 8 includes a plurality of moving
GS10450 / PCT-771
magnets 9 (magnetic field means) attached to the outer
peripheral surface of the drum shell 1 of the mixer drum M so
that different magnetic poles appear alternately in the
circumferential direction, and an armature 10 provided on the
frame C to oppose the moving magnets 9. The armature 10 of
the motor 8 is disposed on the frame C in the space between the
rear portion of the mixer drum M in the frontward tilted attitude
and the rear portion of the frame C.
In the mixer drum driving apparatus S1 according to
the modified example shown in the motor 3, reduction
gear unit 4, sprockets 5, 6, and roller chain 7 of the first
embodiment are not provided. Only two drum rollers R are
provided so that the mixer drum M can be supported without
being biased to the left or right relative to the vehicle
advancement direction, and the two drum rollers R are attached
to the leg T, not shown in the figure. All other structures of the
concrete mixer truck V are identical to the first embodiment, and
therefore detailed description thereof has been omitted.
The armature 10 includes an arc-shaped frame 11
disposed on the rear portion of the frame C, a plurality of fixed
magnets 12 provided on an upper surface of the frame 11 in
alignment with the outer periphery of the mixer drum M, and
coils 13 wound respectively around the fixed magnets 12. The
GS10450 / PCT-771
fixed magnets 12 are provided to oppose the moving magnets 9
provided on the outer periphery of the mixer drum M. The coils
13 are connected to the power supply B via an inverter. The
mixer drum M is driven to rotate by supplying power to the coils
13 so that the moving magnets 9 opposing the fixed magnets 12
are attracted and repelled. The motor 8 thus constitutes a
linear motor that rotates the mixer drum M normally and in
reverse.
The motor 8 may be provided further toward a front side
of the vehicle than the leg T (not shown) or further toward a rear
side. Moreover, the moving magnets 9 may be attached to a
front side end or a rear side end of the roller ring 2, the two drum
rollers R may be disposed at a remove from each other in the
vehicle width direction, and the armature 10 may be provided
between the drum rollers R.
In the mixer drum driving apparatus S1, the motor 8
constituting the drive source that drives the mixer drum M is
provided in the rear portion of the frame C, and the armature 10
of the motor 8 is provided on the frame C in the space between
the rear portion of the mixer drum M in the frontward tilted
attitude and the rear portion of the frame C. Since the drive
source is not provided between the operator cab O of the
concrete mixer truck V and the mixer drum M, space for carrying
GS10450 / PCT-771
the mixer drum M can be secured on the frame C. Hence, the
capacity of the mixer drum M is not compressed, and therefore a
sufficient fresh concrete carrying capacity can be secured. As a
result, a reduction in the fresh concrete transportation amount
can be prevented, and the mixer drum M can be driven by the
motor 3 without causing a reduction in transportation efficiency.
Further, since the transportation efficiency is not reduced, the
fuel consumption of the concrete mixer truck V can be reduced.
Moreover, the part of the chassis and the frame C in which the
mixer drum driving apparatus S is disposed can be reduced in
weight in comparison with the related art.
Furthermore, with the motor 8, the mixer drum M is
driven to rotate without contact, and therefore wear on a power
transmission mechanism and so on does not occur. As a result,
a lifespan of the mixer drum driving apparatus S1 can be
lengthened.
Referring to a mixer drum driving apparatus S2
according to another modified example of the first embodiment
will be described.
In the mixer drum driving apparatus S2 according to
the modified example shown in a drive source D1
includes a hydraulic motor 15 that drives the drum rollers R to
rotate, a hydraulic pump 16 that supplies working oil to the
GS10450 / PCT-771
hydraulic motor 15, and a motor 17 that drives the hydraulic
pump 16. Power from the hydraulic motor 15 is transmitted to
the drum rollers R via the reduction gear unit 4, the sprockets 5,
6, and the roller chain 7. The mixer drum driving apparatus S2
differs from the mixer drum driving apparatus S according to the
first embodiment in that power from the motor 17 is transmitted
to the drum rollers R via the hydraulic pump 16 and the
hydraulic motor 15. The drive source D1 of the mixer drum
driving apparatus S2 is provided on the frame C in the space
between the rear portion of the mixer drum M in the frontward
tilted attitude and the rear portion of the frame C.
The hydraulic pump 16 and the hydraulic motor 15 are
connected by a loop-shaped pipe line 18. A discharge direction
of the working oil from the hydraulic pump 16 is switched by
rotating the motor 17 either normally or in reverse. By
switching the discharge direction of the working oil from the
hydraulic pump 16, the hydraulic motor 15 is rotated either
normally or in reverse, and as a result, the mixer drum M is
rotated either normally or in reverse.
In the mixer drum driving apparatus S2, the drive
source D1 is provided in the rear portion of the frame C, or in
other words on the frame C in the space between the rear portion
of the mixer drum M in the frontward tilted attitude and the rear
GS10450 / PCT-771
portion of the frame C. The drive source D1 is not provided
between the operator cab O of the concrete mixer truck V and the
mixer drum M, and therefore space for carrying the mixer drum
M can be secured on the frame C. Hence, the capacity of the
mixer drum M is not compressed, and therefore a sufficient fresh
concrete carrying capacity can be secured. As a result, a
reduction in the fresh concrete transportation amount can be
prevented, and the mixer drum M can be driven by the motor 3
without causing a reduction in transportation efficiency. Since
the transportation efficiency is not reduced, the fuel
consumption of the concrete mixer truck V can be reduced.
Moreover, the part of the chassis and the frame C in which the
mixer drum driving apparatus S is disposed can be reduced in
weight in comparison with the related art.
Referring to a mixer drum driving apparatus S3
according to a second embodiment of the present invention will
be described.
The mixer drum driving apparatus S3 according to the
second embodiment includes the same drive source D as the
mixer drum driving apparatus S according to the first
embodiment, and a hydraulic system P that drives the mixer
drum M to rotate independently of the motor 3 of the drive
source D.
GS10450 / PCT-771
The hydraulic system P includes a second hydraulic
motor 19 coupled to the axial center portion provided on the
front side end of the mixer drum M, and a second hydraulic
pump 20 that is driven to rotate by an engine E of the concrete
mixer truck V to supply working oil to the second hydraulic
motor 19. The second hydraulic motor 19 and the second
hydraulic pump 20 are connected by a loop-shaped pipe line 21.
The second hydraulic pump 20 is connected to the engine E via a
PTO 22 that draws power from the engine E to the outside.
The second hydraulic pump 20 is a bidirectional
discharge type hydraulic pump. By switching a discharge
direction of the working oil supplied to the second hydraulic
motor 19 from the second hydraulic pump 20, the mixer drum M
is rotated either normally or in reverse. The second hydraulic
motor 19, the second hydraulic pump 20, and so on constituting
the hydraulic system P are disposed on the frame C between the
operator cab O of the concrete mixer truck V and the mixer drum
In the mixer drum driving apparatus S3 according to
the second embodiment, two systems, namely the hydraulic
system P and the drive source D, are used as systems for driving
the mixer drum M to rotate, and therefore the mixer drum M can
be driven to rotate even when a problem occurs in one of the
GS10450 / PCT-771
systems.
The motor 3 of the mixer drum driving apparatus S3 is a
motor generator, and therefore functions as a power generator
that generates electric power as the mixer drum M rotates when
the mixer drum M is rotated by the hydraulic system P. When
the mixer drum M is rotated on the basis of the drive force from
the second hydraulic motor 19, the motor 3 generates power.
The motor 3 and the power supply B are electrically connected
such that the power generated by the motor 3 is supplied to the
power supply B. As a result, the power supply B is charged.
In the mixer drum driving apparatus S3, the hydraulic
system P is disposed on the frame C between the operator cab O
of the concrete mixer truck V and the mixer drum M, while the
drive source D is disposed in the rear portion of the frame C.
Hence, the hydraulic system P and the drive source D are
provided discretely on the frame C, and therefore a load of the
mixer drum driving apparatus S3 is not concentrated on the part
of the frame C between the operator cab O and the mixer drum M.
The strength of the frame C and a chassis frame of the concrete
mixer truck V between the operator cab O and the mixer drum M
does not therefore have to be increased above that of the related
art, and as a result, the vehicle weight of the concrete mixer
truck V can be reduced and a maximum fresh concrete carrying
GS10450 / PCT-771
capacity can be increased. Since a sufficient fresh concrete
carrying capacity can be secured, a reduction in the fresh
concrete transportation amount can be prevented, and therefore
the mixer drum M can be driven by the motor 3 without causing
a reduction in transportation efficiency. Furthermore, since
the transportation efficiency is not reduced, the fuel
consumption of the concrete mixer truck V can be reduced.
In the mixer drum driving apparatus S3, when a
charged capacity of the power supply B is low, the power supply
B can be charged using the motor 3 by driving the mixer drum M
to rotate using the hydraulic system P. Therefore, a situation in
which the mixer drum M stops rotating while transporting fresh
concrete can be prevented. After the power supply B has been
sufficiently charged, the mixer drum M can be driven to rotate
using the motor 3. By charging the power supply B using the
motor 3 in this manner, the power supply B does not have to be
charged frequently using a commercial power supply.
It should be noted that the hydraulic system P
described above may also be applied to the mixer drum driving
apparatuses S1, S2 described as modified examples of the first
embodiment. Likewise in the mixer drum driving apparatuses
S1, S2, the power supply B can be charged by configuring the
motors 8, 17 to have an additional function as a power
GS10450 / PCT-771
generator.
Although the invention has been described above with
reference to certain embodiments, the invention is not limited to
the embodiments described above. Modifications and
variations of the embodiments described above will occur to
those skilled in the art, within the scope of the claims.
The present application claims priority based on
JP2011-065507, filed with the Japan Patent Office on March 24,
2011, the entire contents of which are incorporated into this
specification by reference.
GS10450 / PCT-771
Claims (6)
1. A mixer drum driving apparatus comprising: a mixer drum carried on a frame of a mixer truck in a frontward tilted condition to be free to rotate; and a drive source configured to drive the mixer drum to rotate, wherein the drive source comprises a motor which is disposed in a space between a rear portion of the mixer drum and a rear portion of the frame in order to drive the mixer drum to rotate.
2. The mixer drum driving apparatus as defined in Claim 1, wherein the drive source further comprises a drum roller which contacts from below a roller ring provided on a rear outer periphery of the mixer drum, and the motor is configured to drive the mixer drum to rotate by rotating the drum roller.
3. The mixer drum driving apparatus as defined in Claim 2, wherein the drum roller is provided in a plurality, and the motor is configured to drive all of the drum rollers to rotate.
4. The mixer drum driving apparatus as defined in Claim 2, GS10450 / PCT-771 wherein the drive source further comprises: a hydraulic motor configured to drive the drum roller to rotate; and a hydraulic pump configured to supply working oil to the hydraulic motor, and the motor is configured to drive the hydraulic pump.
5. The mixer drum driving apparatus as defined in Claim 1, wherein the motor is a linear motor which comprises a magnet which is provided on a rear outer periphery of the mixer drum and has different magnetic poles arranged alternately in a circumferential direction, and an armature provided on the frame to oppose the magnet.
6. The mixer drum driving apparatus as defined in Claim 1, further comprising: a hydraulic motor coupled to the mixer drum to be capable of driving the mixer drum to rotate; and a hydraulic pump which is driven by an engine of the mixer truck to supply working oil to the hydraulic motor, wherein the motor is driven by a rotation of the mixer drum so as to generate electric power when the mixer drum is driven to rotate by the hydraulic motor.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2011065507A JP2012201145A (en) | 2011-03-24 | 2011-03-24 | Mixer drum driving device |
JP2011-065507 | 2011-03-24 | ||
PCT/JP2012/056642 WO2012128166A1 (en) | 2011-03-24 | 2012-03-15 | Mixer drum driving device |
Publications (2)
Publication Number | Publication Date |
---|---|
NZ615636A NZ615636A (en) | 2014-05-30 |
NZ615636B true NZ615636B (en) | 2014-09-02 |
Family
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