WO2007071672A1 - Stabilizer device for a heavy work vehicle - Google Patents

Stabilizer device for a heavy work vehicle Download PDF

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Publication number
WO2007071672A1
WO2007071672A1 PCT/EP2006/069903 EP2006069903W WO2007071672A1 WO 2007071672 A1 WO2007071672 A1 WO 2007071672A1 EP 2006069903 W EP2006069903 W EP 2006069903W WO 2007071672 A1 WO2007071672 A1 WO 2007071672A1
Authority
WO
WIPO (PCT)
Prior art keywords
stabilizer
axis
rotation
supporting frame
stabilizer arms
Prior art date
Application number
PCT/EP2006/069903
Other languages
French (fr)
Inventor
Stefano Baiardo
Original Assignee
Stefano Baiardo
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
Application filed by Stefano Baiardo filed Critical Stefano Baiardo
Priority to AU2006328493A priority Critical patent/AU2006328493A1/en
Priority to EP06841449A priority patent/EP1973832A1/en
Publication of WO2007071672A1 publication Critical patent/WO2007071672A1/en

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
    • B66C23/62—Constructional features or details
    • B66C23/72—Counterweights or supports for balancing lifting couples
    • B66C23/78—Supports, e.g. outriggers, for mobile cranes
    • B66C23/80—Supports, e.g. outriggers, for mobile cranes hydraulically actuated

Definitions

  • the present invention concerns a stabilizer device to stabilize, with respect to the ground or road surface, a heavy work vehicle, such as for example a truck on which a concrete mixer is mounted, a pump for concrete or other equipment for the building trade.
  • a heavy work vehicle such as for example a truck on which a concrete mixer is mounted, a pump for concrete or other equipment for the building trade.
  • the stabilizer device according to the present invention comprises a plurality of stabilizer arms pivoted to the frame of the truck, and able to selectively rotate on a substantially horizontal plane to be disposed radially, so as to ensure the stability of the vehicle during its operating steps.
  • Heavy work vehicles are known, used in the building trade, normally consisting of a truck or lorry on which one or more pieces of building equipment are installed, such as for example pumpmixers, concrete pumps or others. It is also known that the truck comprises a stabilizer device consisting of four stabilizer arms, each of which is pivoted around an axis of rotation substantially vertical to respective lateral elements, upper and lower, of the frame of the truck, so as to be able to be selectively rotated on a substantially horizontal plane between an inactive position and a working position.
  • each stabilizer arm is of the telescopic type and is hollow inside, so as to house inside it, along a median longitudinal axis, a respective actuator member in order to extend it.
  • the axis of rotation and the median longitudinal axis of each individual arm intersect at a point inside the bulk of the arm.
  • two cylindrical pivoting pins are provided, mounted rotatable on opposite sides on the relative arm and coaxial with the axis of rotation of the latter.
  • Each of the two pins is kept correctly positioned with respect to the frame and the relative arm by means of specific auxiliary pivoting elements, such as bushings, plates, brasses, flanges or other, which also have the function of guaranteeing an optimum rotation of the pins with respect to the lateral elements, upper and lower, of the frame of the truck, and allow the correct distribution of the active components of reaction forces which develop on every pin due to the operations of the equipment.
  • a first disadvantage of the known solution is the high number of auxiliary elements that must be provided for each arm; this disadvantage causes an increase in the times and costs of production, assembly and maintenance.
  • Another disadvantage of the known solution is that to allow the two pins to support the expected forces, they must have parts which are structurally oversized, even if only partly.
  • Purpose of the present invention is to achieve a stabilizer device for a heavy work vehicle which not only guarantees the necessary stable positioning of the heavy vehicle during the operating steps of its equipment, but also allows to reduce the times and costs of production, and the overall structural bulk.
  • the Applicant has devised, tested and embodied the present invention to overcome the shortcomings of the state of the art and to obtain these and other purposes and advantages.
  • a stabilizer device for a heavy work vehicle comprises a plurality of stabilizer arms each pivoted around its substantially vertical axis of rotation, on a supporting frame of the heavy work vehicle.
  • each stabilizer arm is of the telescopic type so that it is able to be positioned between a packed position in which it occupies minimum bulk in length, and an extended position in which it occupies maximum bulk in length.
  • the device according to the present invention also comprises a telescopic actuator disposed coaxial with a median longitudinal axis of the stabilizer arm, to determine the passage of the latter between its packed position and its extended position.
  • each stabilizer arm has its axis of rotation distanced by a determinate distance "D", for example comprised between about 150 mm and about 400 mm, from its median longitudinal axis, and is pivoted on the frame by means of a single pivoting element, such as for example a through pin, disposed coaxial with the respective axis of rotation.
  • D determinate distance
  • This advantage allows to reduce the number of auxiliary pivoting elements provided, substantially halving the times and costs of production, assembly and maintenance of each stabilizer arm.
  • each stabilizer arm by pivoting each stabilizer arm around a single pivoting element we obtain a better distribution of the load forces that develop in the operating steps of the heavy vehicle, and it is thus possible to reduce the thickness and bulk of the supporting frame and consequently the overall bulk of the heavy vehicle.
  • the telescopic actuator is fixed on one side to the inside of the relative stabilizer arm in correspondence with one end of the latter.
  • the axis of rotation of the stabilizer arm is also comprised between the end to which the telescopic actuator is fixed and a center line zone of the stabilizer arm in its packed position.
  • the distribution of forces on the pivoting elements is further optimized, also with regard to the thrust made by the telescopic actuator to move the stabilizer arm between its packed position and its extended position.
  • - fig. 1 is a lateral view of a heavy work vehicle on which the stabilizer device according to the present invention is installed;
  • - fig. 2 is a view from above of the stabilizer device in fig. 1;
  • - fig. 3 is a lateral view of an enlarged detail, partly sectioned, of the stabilizer device in fig. 1;
  • - fig. 4 is a front view of fig. 3.
  • a stabilizer device 10 according to the present invention is shown, able to stabilize with respect to the ground, or the road surface, a heavy work vehicle 11, in this case provided with a placing boom 12 for casting concrete during the construction of buildings.
  • the heavy vehicle 11 also comprises a truck 13 mobile on wheels 14 and provided with a driver's cabin 15, and a supporting frame 16, on which the placing boom 12 is mounted.
  • the stabilizer device 10 comprises four stabilizer arms, respectively two front 17, telescopic, and two rear 19, normally extended, all tubular in shape and pivoted around their own substantially vertical axis of rotation X (fig.
  • the two front arms 17, telescopic comprise a plurality of elements 18 (figs. 3 and 4) disposed coaxial with a median longitudinal axis Y of the relative front arm 17 and reciprocally sliding, to be positioned between a packed position (figs. 1 and 2), in which they are one inside the other and occupy minimum bulk, and an extended position (fig. 3), in which they are disposed one after the other and occupy maximum possible bulk.
  • the axis of rotation X and the median longitudinal axis Y of each front arm 17 are distanced from each other by a distance D comprised between about 150 mm and about 400 mm.
  • the movement between the packed position and the extended position is effected by means of a telescopic actuator 24, of a substantially known type, disposed substantially coaxial with the median longitudinal axis Y and fixed to one end of the first element 18 by means of a pin 34.
  • the axis of rotation X of the front arm 17 is comprised between the end to which the telescopic actuator 24 is fixed by means of the pin 34, and the center line of the first element 18 of the front arm 17.
  • the telescopic actuator 24 has a plurality of segments of rod 38, each of which is mechanically connected to a corresponding one of the elements 18 of the stabilizer arm 17, so that each of the elements 18 is moved individually and not drawn by the others , so as to reduce the risk of blockages.
  • figs. 2 and 3 show the pivoting system of the two front arms 17 of the telescopic type, but it is understood that the system can refer equally to the two rear arms 19 too.
  • an oil- dynamic actuator 20 is associated, which allows it to rotate on a substantially horizontal plane, between an inactive position, in which it is disposed inside the bulk of the frame 16, and a working position, in which it protrudes laterally from the frame 16 and contacts the ground with its supporting feet 21, to partly lift the wheels 14 and stabilize the position of the heavy vehicle 11.
  • the front arm 17 is pivoted with its first element 18 to the frame 16 by means of a single pin 25, disposed through the first element 18 and coaxial with the axis of rotation X of the relative front arm 17.
  • the single pin 25 is constrained at the ends to the frame
  • threaded clamping means may be provided instead of the attachment plate 30, or other means able to keep the relative single pins 25 constrained to the frame 16.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Vehicle Body Suspensions (AREA)
  • Transmission Devices (AREA)

Abstract

Stabilizer device (10) for heavy work vehicle (11) provided with a supporting frame (16). The device (10) comprises a plurality of stabilizer arms (17, 19) pivoted to the supporting frame (16) around their own axis of rotation (X) so as to be selectively positioned between a packed position in which they occupy the minimum bulk in length, and an extended position in which they occupy the maximum bulk in length, and actuator members (24) disposed inside each of the stabilizer arms (17, 19) coaxial with a median longitudinal axis (Y) of the latter, in order to actuate the movement thereof between the packed position and the extended position. Each stabilizer arm (17, 19) has its axis of rotation (X) distanced by a determinate distance (D) from its median longitudinal axis (Y) and is pivoted to the supporting frame (16) by means of a single pivoting element (25) disposed substantially coaxial with the axis of rotation (X).

Description

"STABILIZER DEVICE FOR A HEAVY WORK VEHICLE"
* * * * *
FIELD OF THE INVENTION
The present invention concerns a stabilizer device to stabilize, with respect to the ground or road surface, a heavy work vehicle, such as for example a truck on which a concrete mixer is mounted, a pump for concrete or other equipment for the building trade. In particular, the stabilizer device according to the present invention comprises a plurality of stabilizer arms pivoted to the frame of the truck, and able to selectively rotate on a substantially horizontal plane to be disposed radially, so as to ensure the stability of the vehicle during its operating steps. BACKGROUND OF THE INVENTION
Heavy work vehicles are known, used in the building trade, normally consisting of a truck or lorry on which one or more pieces of building equipment are installed, such as for example pumpmixers, concrete pumps or others. It is also known that the truck comprises a stabilizer device consisting of four stabilizer arms, each of which is pivoted around an axis of rotation substantially vertical to respective lateral elements, upper and lower, of the frame of the truck, so as to be able to be selectively rotated on a substantially horizontal plane between an inactive position and a working position.
In particular, each stabilizer arm is of the telescopic type and is hollow inside, so as to house inside it, along a median longitudinal axis, a respective actuator member in order to extend it.
In known solutions, the axis of rotation and the median longitudinal axis of each individual arm intersect at a point inside the bulk of the arm. To prevent interference with the actuator members, on every arm two cylindrical pivoting pins are provided, mounted rotatable on opposite sides on the relative arm and coaxial with the axis of rotation of the latter. Each of the two pins is kept correctly positioned with respect to the frame and the relative arm by means of specific auxiliary pivoting elements, such as bushings, plates, brasses, flanges or other, which also have the function of guaranteeing an optimum rotation of the pins with respect to the lateral elements, upper and lower, of the frame of the truck, and allow the correct distribution of the active components of reaction forces which develop on every pin due to the operations of the equipment.
A first disadvantage of the known solution is the high number of auxiliary elements that must be provided for each arm; this disadvantage causes an increase in the times and costs of production, assembly and maintenance.
Another disadvantage of the known solution is that to allow the two pins to support the expected forces, they must have parts which are structurally oversized, even if only partly.
However, this oversizing of the parts entails an increase in the times and costs of production, and also of the overall bulk of the vehicle, with possible limitations to its free circulation on the roads.
Purpose of the present invention is to achieve a stabilizer device for a heavy work vehicle which not only guarantees the necessary stable positioning of the heavy vehicle during the operating steps of its equipment, but also allows to reduce the times and costs of production, and the overall structural bulk.
The Applicant has devised, tested and embodied the present invention to overcome the shortcomings of the state of the art and to obtain these and other purposes and advantages.
SUMMARY OF THE INVENTION
The present invention is set forth and characterized in the main claim, while the dependent claims describe other characteristics of the invention or variants to the main inventive idea.
In accordance with the above purpose, a stabilizer device for a heavy work vehicle according to the present invention comprises a plurality of stabilizer arms each pivoted around its substantially vertical axis of rotation, on a supporting frame of the heavy work vehicle.
In particular, each stabilizer arm is of the telescopic type so that it is able to be positioned between a packed position in which it occupies minimum bulk in length, and an extended position in which it occupies maximum bulk in length.
The device according to the present invention also comprises a telescopic actuator disposed coaxial with a median longitudinal axis of the stabilizer arm, to determine the passage of the latter between its packed position and its extended position.
According to a characteristic feature of the present invention, each stabilizer arm has its axis of rotation distanced by a determinate distance "D", for example comprised between about 150 mm and about 400 mm, from its median longitudinal axis, and is pivoted on the frame by means of a single pivoting element, such as for example a through pin, disposed coaxial with the respective axis of rotation.
In the embodiment according to the present invention it is thus possible to use a single pivoting element for each stabilizer arm, without risk of interference with the telescopic actuator.
This advantage allows to reduce the number of auxiliary pivoting elements provided, substantially halving the times and costs of production, assembly and maintenance of each stabilizer arm.
Moreover, by pivoting each stabilizer arm around a single pivoting element we obtain a better distribution of the load forces that develop in the operating steps of the heavy vehicle, and it is thus possible to reduce the thickness and bulk of the supporting frame and consequently the overall bulk of the heavy vehicle.
According to a preferential form of embodiment of the present invention, the telescopic actuator is fixed on one side to the inside of the relative stabilizer arm in correspondence with one end of the latter.
Advantageously, the axis of rotation of the stabilizer arm is also comprised between the end to which the telescopic actuator is fixed and a center line zone of the stabilizer arm in its packed position. In this way the distribution of forces on the pivoting elements is further optimized, also with regard to the thrust made by the telescopic actuator to move the stabilizer arm between its packed position and its extended position. This advantage allows to further reduce the overall bulk of the frame.
BRIEF DESCRIPTION OF THE DRAWINGS
These and other characteristics of the present invention will become apparent from the following description of a preferential form of embodiment, given as a non-restrictive example with reference to the attached drawings wherein:
- fig. 1 is a lateral view of a heavy work vehicle on which the stabilizer device according to the present invention is installed;
- fig. 2 is a view from above of the stabilizer device in fig. 1;
- fig. 3 is a lateral view of an enlarged detail, partly sectioned, of the stabilizer device in fig. 1;
- fig. 4 is a front view of fig. 3.
DETAILED DESCRIPTION OF A PREFERENTIAL FORM OF EMBODIMENT With reference to fig. 1, a stabilizer device 10 according to the present invention is shown, able to stabilize with respect to the ground, or the road surface, a heavy work vehicle 11, in this case provided with a placing boom 12 for casting concrete during the construction of buildings.
The heavy vehicle 11 also comprises a truck 13 mobile on wheels 14 and provided with a driver's cabin 15, and a supporting frame 16, on which the placing boom 12 is mounted.
The stabilizer device 10 comprises four stabilizer arms, respectively two front 17, telescopic, and two rear 19, normally extended, all tubular in shape and pivoted around their own substantially vertical axis of rotation X (fig.
2), along the sides of the frame 16.
In particular, the two front arms 17, telescopic, comprise a plurality of elements 18 (figs. 3 and 4) disposed coaxial with a median longitudinal axis Y of the relative front arm 17 and reciprocally sliding, to be positioned between a packed position (figs. 1 and 2), in which they are one inside the other and occupy minimum bulk, and an extended position (fig. 3), in which they are disposed one after the other and occupy maximum possible bulk.
According to a characteristic feature of the invention, the axis of rotation X and the median longitudinal axis Y of each front arm 17 are distanced from each other by a distance D comprised between about 150 mm and about 400 mm. The movement between the packed position and the extended position is effected by means of a telescopic actuator 24, of a substantially known type, disposed substantially coaxial with the median longitudinal axis Y and fixed to one end of the first element 18 by means of a pin 34.
Advantageously, the axis of rotation X of the front arm 17 is comprised between the end to which the telescopic actuator 24 is fixed by means of the pin 34, and the center line of the first element 18 of the front arm 17.
In this case, the telescopic actuator 24 has a plurality of segments of rod 38, each of which is mechanically connected to a corresponding one of the elements 18 of the stabilizer arm 17, so that each of the elements 18 is moved individually and not drawn by the others , so as to reduce the risk of blockages.
For a more practical description, figs. 2 and 3 show the pivoting system of the two front arms 17 of the telescopic type, but it is understood that the system can refer equally to the two rear arms 19 too.
As shown in fig. 2, with each stabilizer arm 17 an oil- dynamic actuator 20 is associated, which allows it to rotate on a substantially horizontal plane, between an inactive position, in which it is disposed inside the bulk of the frame 16, and a working position, in which it protrudes laterally from the frame 16 and contacts the ground with its supporting feet 21, to partly lift the wheels 14 and stabilize the position of the heavy vehicle 11.
As shown, the front arm 17 is pivoted with its first element 18 to the frame 16 by means of a single pin 25, disposed through the first element 18 and coaxial with the axis of rotation X of the relative front arm 17.
The single pin 25 is constrained at the ends to the frame
16 by means of relative attachment plates 30, which allow to define a structural continuity of the stabilizer arm 17 with the frame 16, thus giving the advantage of a uniform distribution of the components of force.
Advantageously, between each attachment plate 30 and the relative surface of the frame 16, and between each single pin 25 and the relative stabilizer arm 17, relative brasses are provided, ball bearings, roller bearings or elements of other type, which facilitate the sliding of the parts during the rotation of the arm 17 between the inactive and working positions.
It is clear that modifications and/or additions of parts may be made to the device 10 as described heretofore, without departing from the field and scope of the present invention.
For example, it comes within the field of the present invention to provide that threaded clamping means may be provided instead of the attachment plate 30, or other means able to keep the relative single pins 25 constrained to the frame 16.
It is also clear that, although the present invention has been described with reference to specific examples, a person of skill in the art shall certainly be able to achieve many other equivalent forms of stabilizer device, having the characteristics as set forth in the claims and hence all coming within the field of protection defined thereby.

Claims

1. Stabilizer device for a heavy work vehicle (11) provided with a supporting frame (16), said device (10) comprising a plurality of stabilizer arms (17, 19) pivoted to said supporting frame (16) around their own axis of rotation (X) and able to be selectively positioned between a packed position in which they occupy the minimum bulk in length, and an extended position in which they occupy the maximum bulk in length, and actuator means (24) disposed inside each of said stabilizer arms (17, 19) coaxial with a median longitudinal axis (Y) of the latter, and able to actuate the movement thereof between said packed position and said extended position, characterized in that each of said stabilizer arms (17, 19) has its axis of rotation (X) distanced by a determinate distance (D) from its median longitudinal axis (Y) and is pivoted to said supporting frame (16) by means of a single pivoting element (25) disposed substantially coaxial with said axis of rotation (X).
2. Device as in claim 1, wherein said actuator means (24) is attached to at least one end of the relative one of said stabilizer arms (17, 19), characterized in that said axis of rotation (X) is comprised between the end of the respective one of said stabilizer arms (17, 19) to which said actuator means (24) is attached and the center line of the stabilizer arm (17, 19) itself, in its packed position.
3. Device as in any claim hereinbefore, characterized in that at least one of said stabilizer arms (17) is of the telescopic type and comprises a plurality of tubular elements (18) sliding with respect to each other between said packed position and said extended position.
4. Device as in claim 3, characterized in that said actuator means (24) is of the telescopic type and comprises a plurality of segments of rod (38) reciprocally sliding with respect to each other, and mechanically connected to a corresponding one of said tubular elements (18).
5. Device as in any claim hereinbefore, characterized in that it comprises attachment means (30) associated with said single pivoting element (25) in order to constrain it to said supporting frame (16).
6. Device as in any claim hereinbefore, characterized in that it also comprises a plurality of linear actuators (20) associated with each of said stabilizer arms (17, 19) in order to rotate them around said axis of rotation (X) between an inactive position substantially comprised in the bulk of said supporting frame (16) and a working position at least partly protruding from said supporting frame (16).
PCT/EP2006/069903 2005-12-21 2006-12-19 Stabilizer device for a heavy work vehicle WO2007071672A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AU2006328493A AU2006328493A1 (en) 2005-12-21 2006-12-19 Stabilizer device for a heavy work vehicle
EP06841449A EP1973832A1 (en) 2005-12-21 2006-12-19 Stabilizer device for a heavy work vehicle

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITUD2005A000215 2005-12-21
ITUD20050215 ITUD20050215A1 (en) 2005-12-21 2005-12-21 STABILIZER DEVICE FOR A HEAVY WORKING VEHICLE

Publications (1)

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WO2007071672A1 true WO2007071672A1 (en) 2007-06-28

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PCT/EP2006/069903 WO2007071672A1 (en) 2005-12-21 2006-12-19 Stabilizer device for a heavy work vehicle

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EP (1) EP1973832A1 (en)
AU (1) AU2006328493A1 (en)
IT (1) ITUD20050215A1 (en)
RU (1) RU2008129401A (en)
WO (1) WO2007071672A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102433999A (en) * 2011-12-23 2012-05-02 三一重工股份有限公司 Concrete pump truck and fixed turret thereof

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29811097U1 (en) * 1998-06-20 1998-08-20 Waitzinger Baumaschinen Vertrieb und Service GmbH, 89278 Nersingen Mobile concrete pump
JPH10236775A (en) * 1997-02-24 1998-09-08 Ishikawajima Constr Mach Co Outrigger for construction machine or the like
DE10032622A1 (en) * 2000-07-07 2002-01-17 Putzmeister Ag Concrete pumping vehicle as footed boom reciprocates boom by double-acting hydraulic cylinder led through boom box and telescoping parts so box swivel axis intersects cylinder axis at right angles.

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10236775A (en) * 1997-02-24 1998-09-08 Ishikawajima Constr Mach Co Outrigger for construction machine or the like
DE29811097U1 (en) * 1998-06-20 1998-08-20 Waitzinger Baumaschinen Vertrieb und Service GmbH, 89278 Nersingen Mobile concrete pump
DE10032622A1 (en) * 2000-07-07 2002-01-17 Putzmeister Ag Concrete pumping vehicle as footed boom reciprocates boom by double-acting hydraulic cylinder led through boom box and telescoping parts so box swivel axis intersects cylinder axis at right angles.

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102433999A (en) * 2011-12-23 2012-05-02 三一重工股份有限公司 Concrete pump truck and fixed turret thereof
CN102433999B (en) * 2011-12-23 2014-09-03 三一汽车制造有限公司 Concrete pump truck and fixed turret thereof

Also Published As

Publication number Publication date
EP1973832A1 (en) 2008-10-01
RU2008129401A (en) 2010-01-27
ITUD20050215A1 (en) 2007-06-22
AU2006328493A1 (en) 2007-06-28

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