WO1999006650A1 - Concrete supply arm with articulated sections - Google Patents

Concrete supply arm with articulated sections Download PDF

Info

Publication number
WO1999006650A1
WO1999006650A1 PCT/EP1998/004588 EP9804588W WO9906650A1 WO 1999006650 A1 WO1999006650 A1 WO 1999006650A1 EP 9804588 W EP9804588 W EP 9804588W WO 9906650 A1 WO9906650 A1 WO 9906650A1
Authority
WO
WIPO (PCT)
Prior art keywords
arm
sections
actuator
hydraulic motor
concrete supply
Prior art date
Application number
PCT/EP1998/004588
Other languages
French (fr)
Inventor
Mauro Cortellini
Giorgio Moretti
Walter Scuratti
Original Assignee
Cifa S.P.A.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to ITMI97A001835 priority Critical
Priority to IT97MI001835A priority patent/IT1293518B1/en
Application filed by Cifa S.P.A. filed Critical Cifa S.P.A.
Publication of WO1999006650A1 publication Critical patent/WO1999006650A1/en

Links

Classifications

    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04GSCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G21/00Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
    • E04G21/02Conveying or working-up concrete or similar masses able to be heaped or cast
    • E04G21/04Devices for both conveying and distributing
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04GSCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G21/00Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
    • E04G21/02Conveying or working-up concrete or similar masses able to be heaped or cast
    • E04G21/04Devices for both conveying and distributing
    • E04G21/0418Devices for both conveying and distributing with distribution hose
    • E04G21/0436Devices for both conveying and distributing with distribution hose on a mobile support, e.g. truck

Abstract

The invention relates to a concrete supply arm, to be mounted in particular on vehicule-transported concrete pumps, having several sections (11, 12) and articulating joints between said sections. In this arm the relative movement of the sections (11, 12) is performed, in correspondence of at least some of the articulating joints of the arm, by means of actuator mechanisms (23) consisting of a worm gear actuated by a hydraulic motor. Conveniently said actuators also comprise a locking brake.

Description

"CONCRETE SUPPLY ARM WITH ARTICULATED SECTIONS"
* * ♦ *
The present invention relates to concrete supply arms - in particular arms mounted on vehicle-transported concrete pumps - having several sections and articulating joints between said sections.
Various types of multiple-section concrete supply arms are already well known, said arms being of the kind in which, the relative movement of the sections is performed, in correspondence of the articulating joints, by means of kinematic mechanisms with articulated rods connected to the sections and double-acting hydraulic cylinders controlling them.
These constructions, however, have the drawback that the angular velocities at which the arm sections are moved are not constant (the angles of relative movement of the sections are not proportional to the stroke of the cylinder) and the significant limitation that, even when using complicated kinematic mechanisms, the angle of maximum relative rotation of the sections is generally not greater than 280° .
It can be easily understood how important it is to avoid the abovementioned drawback and limitation of the known constructions, in order to achieve greater operational efficiency and safety and have a greater degree of manoeuvrability and versatility during use of the concrete supply arms, in particular along the sections and at the articulating joints closest to the delivery end of the arms themselves. The present invention considers and solves these problems by providing a concrete supply arm - to be mounted in particular on vehicle-transported concrete pumps - having several sections and articulating joints between said sections, characterized in that the relative movement of the sections is performed, in correspondence of at least some of the articulating joints of the arm, by means of actuator mechanisms consisting of a worm gear actuated by a hydraulic motor.
Preferably said actuators also comprise a locking brake. Conveniently in the arm according to the invention the relative movement of the sections is performed by means of actuator mechanisms consisting of a worm gear actuated by a hydraulic motor only at the articulating joints close to the delivery end of the arm.
With arms constructed in this manner, the angular velocity at which the relative movement of the sections takes place may be kept constant, without difficulty, over the entire amplitude of the relative angular displacements and the latter may also be much greater than
280° , with obvious advantages for the operators and improvement in the quality of the work.
The invention is now described in greater detail with reference to the accompanying drawings which relate to some preferred embodiments of the arm according to the invention as defined above and in which:
Fig. 1 is a schematic view of the articulation between two end sections of a concrete supply arm according to the prior art;
Figs. 2 and 3 are two schematic views - a side view and a plan view - of an articulating joint between two sections of a concrete supply arm equipped, according to a first embodiment of the invention, with an internal actuator;
Figs. 4 and 5 are two similar schematic views of a different embodiment of the solution according to Figs. 2 and 3; Figs. 6 and 7 are two similar schematic views of a further embodiment of the solution according to Figs. 2 and 3;
Figs. 8 and 9 are two schematic views - a side view and a plan view - of an articulating joint between two sections of a concrete supply arm equipped, according to another embodiment of the invention, with an external actuator; and
Fig. 10 shows in detail a sectional view of a possible construction of one of the actuators applied to the embodiments of Figs. 2 to 9 of the invention.
With reference to the drawings, Fig. 1 shows a schematic view of the construction of an articulation or articulating joint between two end sections of a concrete supply arm according to the prior art: the two sections 1 and 2 are connected by a kinematic mechanism comprising two connecting rods 3 and 4 which are pivotably hinged at 5, 6 and 7 to the two sections 1 and 2 and to one another and a double-acting hydraulic cylinder-piston unit 8, the cylinder of which is pivotably hinged at the closed end at 9 to a lug 1 A of the section 1 and the piston of which is pivotably hinged at 10 with its outer end to the connecting rod 3, so as to control the movement of the section 2 with respect to the section 1 . It is obvious from this figure that the maximum angle by which the section 2 is able to be rotated with respect to the section 1 does not exceed 280° (it is equivalent to about 270°), while the angular velocities at which the sections of the arm may be moved are not constant, but continuously variable, since the angles of relative movement of the sections are not proportional to the stroke of the cylinder. According to the invention, these drawbacks - which result, as already mentioned, in the poor operational efficiency and safety and in particular in a degree of manoeuvrability and versatility far inferior to that which is desirable in the use of the concrete supply arms - are eliminated by performing the relative movement of the sections, in correspondence of at least some of the articulating joints of the arm, by means of actuator mechanisms consisting of a worm gear actuated by a hydraulic motor and applied in various ways, as illustrated in Figs. 2 to 10.
In the embodiment according to Figs. 2 and 3 of the invention, an internal actuator 1 3, in line with both the sections 1 1 and 1 2 of the arm, is used. The actuator comprises a worm gear consisting of a worm screw housed in a casing 14 and of a wheel in engagement with said screw, housed inside a casing 1 5, the latter being located in a special seat 1 6 formed at the end of the section 1 1 of the arm. The casing 14 also houses a hydraulic motor which - suitably energised - causes rotation of the the worm screw of the actuator and produces the rotations, in either direction, of the associated wheel, moving the section 1 2 with respect to the section 1 1 . The actuator also comprises preferably parking brake means so as to lock as securely as possible the two sections 1 1 and 1 2 in the desired position. It can be clearly seen that it is possible to exceed without difficulty, using this solution, an angle of movement of the section 1 2 with respect to the section 1 1 which is far greater than 280° and it is obvious that, by using the actuator 1 3, it is possible to achieve a constant angular velocity during the movement. In the embodiment according to Figs. 4 and 5, the actuator 1 3 is again internal and in line with both the sections, but the rest position of the latter, which in the preceding case consisted in the elements resting on top of each other (section 1 2 folded underneath the section 1 1 ), in this case consists in the elements being aligned with each other, with the section 1 2 which is at rest being arranged aligned as a continuation of the section 1 1 .
In the embodiment according to Figs. 6 and 7, on the other hand, the actuator 1 3 is again internal, but is in line with only one of the sections of the arm to be moved relative to one another, for example with the section 1 1 . With this construction it is possible to obtain a continuous rotary movement of the section 1 2 with respect to the section 1 1 and the locking of the former with respect to the latter in any position over the entire angle of 360° .
In the embodiment according to Figs. 8 and 9 of the invention, an actuator 23 which is located outside both the sections 21 and 22 of the arm is used. The actuator comprises a worm screw housed in a casing 24 and a wheel in engagement with said screw, housed in a casing 25. The casing 24 also houses a hydraulic motor which - suitably energised - causes rotation of the worm screw of the actuator and produces rotations, in either direction, of the associated wheel, moving the section 22 with respect to the section 21 . The actuator is arranged alongside the ends of the sections 21 and 22 which are articulated with one another and is conne.cted to the section 21 by an anti-torsional bar 21 A and to the section 22 by the output shaft moved by the wheel housed inside the casing 25. In this case, also, the actuator preferably comprises locking brake means, so as to lock as securely as possible the two sections 21 and 22 in the desired position. In this case also it is possible to exceed, without difficulty, an angle of movement of the section 22 with respect to the section 21 which is far greater than 280° with a constant angular- velocity movement.
Fig. 10 illustrates a possible construction of an actuator 30 to be applied to any one of the embodiments according to Figs. 2 and 9 of the concrete supply arm according to the invention. The actuator illustrated comprises, inside a casing 31 to be associated with the arm by means of the lug 31 A, a transmission consisting of a worm screw
32 and of a wheel 33 housed respectively in the parts 34 and 35 of the casing 31 , with which there are also associated an orbital hydraulic motor 36, which causes rotation, whenever suitably energised, of the worm screw 32 and a lamellar brake 37 intended to lock in the desired position the shaft of the screw 32 and hence the two sections of the arm on the articulating joint of which the actuator 30 is mounted.
It is understood that the construction of the concrete supply arm according to the invention may differ from those described and illustrated. In particular different actuators may be used, being differently driven or differently arranged with respect to that described, without thereby departing from the protective scope of the invention.

Claims

CLAIMS 1 . Concrete supply arm - to be mounted in particular on vehicle-transported concrete pumps - having several sections and articulating joints between said sections, characterized in that the relative movement of the sections is performed, in correspondence of at least some of the articulating joints of the arm, by means of actuator mechanisms consisting of a worm gear actuated by a hydraulic motor.
2. Arm as claimed in Claim 1 , in which said actuators also comprise a locking brake.
3. Arm as claimed in Claims 1 and 2, in which said locking brake is a lamellar brake associated with the actuator mechanism.
4. Arm as claimed in Claims 1 to 3, in which said hydraulic motor is an orbital motor.
5. Arm as claimed in Claims 1 to 4, in which the relative movement of the sections is performed by means of actuator mechanisms consisting of a worm gear actuated by a hydraulic motor only in correspondence of the articulating joints close to the delivery end of the arm.
6. Arm as claimed in Claim 3, in which the relative movement of the sections is performed by means of actuator mechanisms consisting of a worm gear actuated by a hydraulic motor only in correspondence of the last articulating joint close to the delivery end of the arm.
PCT/EP1998/004588 1997-07-31 1998-07-22 Concrete supply arm with articulated sections WO1999006650A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
ITMI97A001835 1997-07-31
IT97MI001835A IT1293518B1 (en) 1997-07-31 1997-07-31 Arm with several articulated trunks for the distribution of concrete

Applications Claiming Priority (7)

Application Number Priority Date Filing Date Title
DE69801997T DE69801997T2 (en) 1997-07-31 1998-07-22 CONCRETE DISTRIBUTION ARM WITH ARTICULATING PARTS
AU89784/98A AU8978498A (en) 1997-07-31 1998-07-22 Concrete supply arm with articulated sections
EP98941399A EP1002172B1 (en) 1997-07-31 1998-07-22 Concrete supply arm with articulated sections
DK98941399T DK1002172T3 (en) 1997-07-31 1998-07-22 Concrete supply arm with articulated sections
AT98941399T AT206793T (en) 1997-07-31 1998-07-22 Concrete distribution arm with articulating parts
CA002298508A CA2298508A1 (en) 1997-07-31 1998-07-22 Concrete supply arm with articulated sections
HR20000046A HRP20000046A2 (en) 1997-07-31 2000-01-27 Concrete supply arm with articulated sections

Publications (1)

Publication Number Publication Date
WO1999006650A1 true WO1999006650A1 (en) 1999-02-11

Family

ID=11377687

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1998/004588 WO1999006650A1 (en) 1997-07-31 1998-07-22 Concrete supply arm with articulated sections

Country Status (17)

Country Link
EP (2) EP0894915A1 (en)
CN (1) CN1265719A (en)
AR (1) AR015139A1 (en)
AT (1) AT206793T (en)
AU (1) AU8978498A (en)
CA (1) CA2298508A1 (en)
CO (1) CO4840534A1 (en)
DE (1) DE69801997T2 (en)
DK (1) DK1002172T3 (en)
ES (1) ES2165698T3 (en)
HR (1) HRP20000046A2 (en)
IT (1) IT1293518B1 (en)
PL (1) PL338450A1 (en)
PT (1) PT1002172E (en)
TR (1) TR200000265T2 (en)
WO (1) WO1999006650A1 (en)
ZA (1) ZA9806638B (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT511833B1 (en) * 2011-11-10 2013-03-15 Schwing Gmbh F Master construction, especially for a autobeton pump
DE102014203054A1 (en) * 2014-02-20 2015-09-03 Putzmeister Engineering Gmbh Concrete distributor boom, in particular a mobile concrete pump
DE102019133396A1 (en) * 2019-11-15 2021-05-20 Schwing Gmbh Articulated drive with planetary gear, large manipulator and truck-mounted concrete pump
DE102019133380A1 (en) * 2019-11-15 2021-05-20 Schwing Gmbh Articulated drive with worm gear, large manipulator and truck-mounted concrete pump

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3572380A (en) * 1968-10-08 1971-03-23 Challenge Cook Bros Inc Concrete pump boom
DE1759404A1 (en) * 1968-04-27 1971-09-23 Schwing Friedrich Device for distributing concrete
GB2132676A (en) * 1982-10-29 1984-07-11 Takenaka Komuten Co Apparatus for horizontally casting concrete

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1759404A1 (en) * 1968-04-27 1971-09-23 Schwing Friedrich Device for distributing concrete
US3572380A (en) * 1968-10-08 1971-03-23 Challenge Cook Bros Inc Concrete pump boom
GB2132676A (en) * 1982-10-29 1984-07-11 Takenaka Komuten Co Apparatus for horizontally casting concrete

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None

Also Published As

Publication number Publication date
AT206793T (en) 2001-10-15
TR200000265T2 (en) 2000-05-22
CO4840534A1 (en) 1999-09-27
EP0894915A1 (en) 1999-02-03
CA2298508A1 (en) 1999-02-11
ITMI971835A1 (en) 1999-02-01
EP1002172B1 (en) 2001-10-10
ZA9806638B (en) 1999-02-02
ES2165698T3 (en) 2002-03-16
HRP20000046A2 (en) 2001-10-31
DK1002172T3 (en) 2002-02-11
DE69801997T2 (en) 2002-05-16
PL338450A1 (en) 2000-11-06
PT1002172E (en) 2002-03-28
CN1265719A (en) 2000-09-06
AU8978498A (en) 1999-02-22
AR015139A1 (en) 2001-04-18
EP1002172A1 (en) 2000-05-24
IT1293518B1 (en) 1999-03-01
DE69801997D1 (en) 2001-11-15

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