NZ615637B2 - Mixer drum driving device - Google Patents
Mixer drum driving device Download PDFInfo
- Publication number
- NZ615637B2 NZ615637B2 NZ615637A NZ61563712A NZ615637B2 NZ 615637 B2 NZ615637 B2 NZ 615637B2 NZ 615637 A NZ615637 A NZ 615637A NZ 61563712 A NZ61563712 A NZ 61563712A NZ 615637 B2 NZ615637 B2 NZ 615637B2
- Authority
- NZ
- New Zealand
- Prior art keywords
- mixer drum
- power
- rotate
- mixer
- rotary motor
- Prior art date
Links
- 239000012530 fluid Substances 0.000 claims 1
- 238000010248 power generation Methods 0.000 abstract description 5
- 230000006735 deficit Effects 0.000 abstract description 3
- 230000002457 bidirectional effect Effects 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 230000032258 transport Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007717 exclusion Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
Classifications
-
- 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
- B28C5/4213—Hydraulic drives
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L1/00—Supplying electric power to auxiliary equipment of vehicles
- B60L1/003—Supplying electric power to auxiliary equipment of vehicles to auxiliary motors, e.g. for pumps, compressors
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
- B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
- B60R16/03—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements for supply of electrical power to vehicle subsystems or for
- B60R16/0307—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements for supply of electrical power to vehicle subsystems or for using generators driven by a machine different from the vehicle motor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/38—Control of exclusively fluid gearing
- F16H61/40—Control of exclusively fluid gearing hydrostatic
- F16H61/4078—Fluid exchange between hydrostatic circuits and external sources or consumers
- F16H61/4139—Replenishing or scavenging pumps, e.g. auxiliary charge pumps
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/80—Technologies aiming to reduce greenhouse gasses emissions common to all road transportation technologies
- Y02T10/90—Energy harvesting concepts as power supply for auxiliaries' energy consumption, e.g. photovoltaic sun-roof
Abstract
mixer drum driving apparatus (S) includes a mixer drum (M) carried on a frame of a mixer truck to be free to rotate and a drive source (D) configured to drive the mixer drum (M) to rotate. Large amounts of power are required when driving a mixer drum carrying fresh concrete to rotate. Often, energy deficits occur from power generation units requiring frequent recharging of batteries. The present apparatus (S) does not require frequent charging of a battery. The apparatus (S) comprises a rotary motor (5); power supply (B) and power generator (6). The rotary motor (5) is configured to drive the mixer drum (M) to rotate via the drive source (D). The power supply (B) supplies power to the rotary motor (5). The power generator (6) is driven by rotation of the mixer drum (M) to charge the generated power to the power supply (B). y deficits occur from power generation units requiring frequent recharging of batteries. The present apparatus (S) does not require frequent charging of a battery. The apparatus (S) comprises a rotary motor (5); power supply (B) and power generator (6). The rotary motor (5) is configured to drive the mixer drum (M) to rotate via the drive source (D). The power supply (B) supplies power to the rotary motor (5). The power generator (6) is driven by rotation of the mixer drum (M) to charge the generated power to the power supply (B).
Description
GS10448 / PCT-769 Specification
DESCRIPTION
MIXER DRUM DRIVING APPARATUS
TECHNICAL FIELD
The present invention relates to a mixer drum driving
apparatus for 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 constantly 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.
GS10448 / PCT-769
In this type of concrete mixer truck, the mixer drum
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, a rotary driving
force of 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 to rotate 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 rises.
Further, the mixer drum must be rotated constantly for
as long as the fresh concrete is carried in the mixer drum to
prevent the fresh concrete from hardening and so on, meaning
that the engine cannot be stopped. It is therefore necessary to
continue to drive the engine even when the concrete mixer truck
is stopped at the pouring site while waiting its turn to discharge
the fresh concrete.
JP2007-278430A discloses a mixer drum driving
apparatus that drives a mixer drum to rotate by driving an
GS10448 / PCT-769
auxiliary hydraulic pump using a rotary motor in addition to a
main hydraulic pump driven using an engine. In this mixer
drum driving apparatus, the main pump driven by the engine is
assisted by the auxiliary pump driven by the rotary motor, and
therefore noise generation can be suppressed and fuel
consumption can be reduced.
SUMMARY OF INVENTION
In the mixer drum driving apparatus according to the
related art described above, the rotary motor is driven by
supplying electric power to the rotary motor from a battery of the
concrete mixer truck.
However, a large amount of power is required to drive a
mixer drum carrying fresh concrete to rotate, and therefore,
when only an alternator that generates power through engine
rotation is used, a power generation amount deficit may occur.
As a result, it may become necessary to charge the battery
frequently from a commercial power supply.
The present invention seeks to provide a mixer drum
driving apparatus that can drive a mixer drum to rotate using a
rotary motor without the need to charge a battery frequently
from a commercial power supply.
According to an aspect of the present invention, a mixer
GS10448 / PCT-769
drum driving apparatus having a mixer drum carried on a frame
of a mixer truck to be free to rotate and a drive source configured
to drive the mixer drum to rotate includes a rotary motor
configured to drive the mixer drum to rotate as the drive source,
a power supply configured to supply power to the rotary motor,
and a power generator configured to generate power as the mixer
drum rotates and charge the generated power to the power
supply.
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 an embodiment of
the present invention.
is a right side view of a concrete mixer truck in which
a mixer drum is carried on a frame.
is a back view of the mixer drum carried on the frame
of the concrete mixer truck.
is a right side view of the concrete mixer truck,
illustrating a modified example of the mixer drum driving
apparatus.
GS10448 / PCT-769
DESCRIPTION OF EMBODIMENTS
A mixer drum driving apparatus according to an
embodiment of the present invention will be described with
reference to the figures.
As shown in FIGS. 1 and 2, a mixer drum driving
apparatus S includes a mixer drum M carried on a frame C of a
concrete mixer truck V to be free to rotate, and a drive source D
that drives the mixer drum M to rotate.
As shown in FIGS. 2 and 3, the mixer drum M and the
drive source D are carried on the frame C of the concrete mixer
truck V. A pair of legs T are disposed on a rear portion of the
frame C of the concrete mixer truck V, and a roller R is provided
on each leg T to be free to rotate.
The mixer drum M is formed in a closed-end cylinder
shape having an open rear end. The mixer drum M includes a
drum shell 1, an axial center portion of which is coupled to the
drive source D in a bottom portion serving as a front side end,
and a roller ring 2 provided on a rear side end outer periphery of
the drum shell 1. The roller ring 2 is supported from a lower
side on the rollers R, 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
GS10448 / PCT-769
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 driven to rotate 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 mixer drum M is driven to rotate 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 the fresh
concrete can be discharged from the mixer drum M.
As shown in the drive source D includes a
hydraulic motor 3, an output shaft of which is coupled to the
axial center portion of the drum shell 1 of the mixer drum M, a
hydraulic pump 4 that supplies working oil to the hydraulic
motor 3, a rotary motor 5 that drives the hydraulic pump 4 to
rotate, a power supply B as a battery that supplies electric power
to the rotary motor 5, and a power generator 6 that generates
power as the mixer drum M rotates and charges the generated
power to the power supply B. The concrete mixer truck V is
configured such that when the hydraulic motor 3 is driven by the
hydraulic pump 4, which is driven by the rotary motor 5, the
mixer drum M can be driven to rotate normally or in reverse.
The drive source D further includes a main hydraulic
GS10448 / PCT-769
pump 7 that is driven to rotate by an engine E of the concrete
mixer truck V in order to supply working oil to the hydraulic
motor 3. In the drive source D according to this embodiment,
the hydraulic pump 4 can be assisted in driving the hydraulic
motor 3 by the main hydraulic pump 7 driven by the engine E,
and conversely, the main hydraulic pump 7 can be assisted in
driving the hydraulic motor 3 by the hydraulic pump 4 driven by
the rotary motor 5. Furthermore, according to the drive source
D, the hydraulic motor 3 can be driven using only the hydraulic
pump 4 driven by the rotary motor 5.
The hydraulic motor 3 is a hydraulic motor capable of
bidirectional rotation, which is connected to the main hydraulic
motor 7 via a loop-form pipe line 8. The main hydraulic pump 7
is a bidirectional discharge type hydraulic pump.
The hydraulic pump 4 is provided midway on a pipe line
9. The pipe line 9 is configured to connect one of two passages
between the hydraulic motor 3 and the main hydraulic pump 7
on the pipe line 8 to a tank 10. The other passage between the
hydraulic motor 3 and the main hydraulic pump 7 on the pipe
line 8 is connected to the tank 10 by a pipe line 11.
The rotary motor 5 is an electric motor connected to the
power supply B so as to rotate in only one direction. The
hydraulic pump 4 is driven by the rotary motor 5 to suction
GS10448 / PCT-769
working oil stored in the tank 10 and discharge the suctioned
working oil toward the hydraulic motor 3.
A four-port, three-position direction switching valve 12
is provided midway on the pipe line 9 and the pipe line 11. The
direction switching valve 12 includes a position for sending the
working oil discharged from the hydraulic pump 4 to the
hydraulic motor 3 in order to rotate the hydraulic motor 3
normally, a position for sending the working oil discharged from
the hydraulic pump 4 to the hydraulic motor 3 in order to rotate
the hydraulic motor 3 in reverse, and a position for returning the
working oil discharged from the hydraulic pump 4 to the tank 10
without sending the working oil to the hydraulic motor 3.
An input shaft 6a of the power generator 6 is connected
to a rotary shaft of the roller R that supports the roller ring 2 of
the drum shell 1 from below. When the rollers R are rotated by
the rotation of the mixer drum M, the input shaft 6a rotates, and
as a result, the power generator 6 generates power. The power
generator 6 is connected to the power supply B via a charging
circuit 13 such that the power generated by the power generator
6 is supplied to the power supply B. As a result, the power
supply B is charged. It should be noted that the power supply B
is also charged by an alternator 14 that generates power as the
engine E rotates.
GS10448 / PCT-769
In the mixer drum driving apparatus S described above,
when the mixer drum M is driven to rotate, the input shaft 6a is
driven to rotate via the roller R, with the result that the power
generator 6 generates power, and the power generated by the
power generator 6 is charged to the power supply B. As a result,
a power generation amount for charging the power supply B is
increased in comparison with a conventional mixer drum driving
apparatus in which the power supply B is charged by the
alternator 14 alone. Hence, according to the mixer drum
driving apparatus S, the power generation amount for charging
the power supply B can be increased, enabling a reduction in a
frequency with which the power supply B is charged using a
commercial power supply. As a result, the mixer drum M can be
driven to rotate using the rotary motor 5 without the need for
frequent charging from a commercial power supply.
It is sufficient for the power generator 6 to be capable of
generating power using the rotation of the mixer drum M. As
shown in therefore, a rotor 6b that rotates while
contacting a predetermined position on an outer periphery of the
mixer drum M may be disposed on the frame C, and the input
shaft 6a of the power generator 6 may be coupled to the rotor 6b.
When the input shaft 6a of the power generator 6 is coupled to
the roller R, however, the rotor 6b is not required, and therefore
GS10448 / PCT-769
a number of components can be reduced, enabling a reduction in
cost. It should be noted that a transmission may be provided
between the input shaft 6a of the power generator 6 and the
roller 6 or between the input shaft 6a of the power generator 6
and the rotor 6b.
Furthermore, according to this embodiment, the mixer
drum M can be rotated by driving the hydraulic motor 3 using
the drive force of the engine E. However, in a case where the
mixer drum M is rotated using the rotary motor 5 alone, the main
hydraulic pump 7 may be omitted.
Although the invention has been described above with
reference to a certain embodiment, the invention is not limited to
the embodiment described above. Modifications and variations
of the embodiment described above will occur to those skilled in
the art, within the scope of the claims.
The present application claims priority based on
JP2011-065505, filed with the Japan Patent Office on March 24,
2011, the entire contents of which are incorporated into this
specification by reference.
The reference in this specification to any prior
publication (or information derived from it), or to any matter
which is known, is not, and should not be taken as an
acknowledgment or admission or any form of suggestion that
GS10448 / PCT-769
that prior publication (or information derived from it) or known
matter forms part of the common general knowledge in the field
of endeavour to which this specification relates.
Throughout this specification and the claims which
follow, unless the context requires otherwise, the word
"comprise", and variations such as "comprises" and "comprising",
will be understood to imply the inclusion of a stated integer or
step or group of integers or steps but not the exclusion of any
other integer or step or group of integers or steps.
GS10448 / PCT-769
Claims (4)
1. A mixer drum driving apparatus having a mixer drum carried on a frame of a mixer truck to be free to rotate and a drive source configured to drive the mixer drum to rotate, the mixer drum driving apparatus further comprising: a rotary motor configured to drive the mixer drum to rotate via the drive source; a power supply configured to supply power to the rotary motor; and a power generator configured to be driven by rotation of the mixer drum to generate power and charge the generated power to the power supply.
2. The mixer drum driving apparatus as defined in Claim 1, wherein the mixer drum is supported to be free to rotate via a roller, and the power generator comprises an input shaft coupled to the roller and is configured to generate power when the input shaft is rotated via the roller.
3. The mixer drum driving apparatus as defined in Claim 1, wherein the power generator comprises a rotor which contacts an outer periphery of the mixer drum and is rotated by a rotation GS10448 / PCT-769 of the mixer drum, and an input shaft coupled to the rotor, and is configured to generate power when the input shaft is rotated via the rotor.
4. The mixer drum driving apparatus as defined in Claim 1, wherein the drive source comprises a hydraulic pump which is driven to rotate by the rotary motor, and a hydraulic motor which is driven by a working fluid discharged from the hydraulic pump, and is configured to drive the mixer drum to rotate by transmitting a rotation of the hydraulic motor to the mixer drum.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2011-065505 | 2011-03-24 | ||
| JP2011065505A JP5798771B2 (en) | 2011-03-24 | 2011-03-24 | Mixer drum drive device |
| PCT/JP2012/056238 WO2012128092A1 (en) | 2011-03-24 | 2012-03-12 | Mixer drum driving device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| NZ615637A NZ615637A (en) | 2015-07-31 |
| NZ615637B2 true NZ615637B2 (en) | 2015-11-03 |
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