Mobile operating machine

Abstract

Mobile operating machine, provided with at least a work device (11) supported by a movement turret (14), at least a pair of stabilizing front legs (12a, 12b) and at least a pair of stabilizing back legs (13a, 13b); the mobile operating machine also comprises a support structure (18) provided with at least a pair of box-like elements (19a, 19b) configured to house the stabilizing front legs (12a, 12b) or back legs, and at least a positioning seating (20) of the movement turret (14) made in a crossing zone (Z) of the box-like elements (19a, 19b); each box-like element (19a, 19b) is provided with a first end (23a, 23b) that is open and through which a respective stabilizing front leg (12a, 12b), or back leg, is slidingly mobile and a second end (25a, 25b), opposite the first end (23a, 23b) and in correspondence with which a respective stabilizing back leg (13a, 13b), or front leg, is pivoted, so as to rotate around a corresponding axis of rotation (R1, R2).

Claims

1. Mobile operating machine, provided with a work device supported by a movement turret, a pair of stabilizing front legs and a pair of stabilizing back legs, wherein said mobile operating machine comprises: a support structure provided with a pair of box-like elements configured to house said stabilizing front legs or back legs, and a positioning seating of said movement turret made in a crossing zone of said box-like elements, wherein each box-like element being provided with a first end that is open and through which a respective stabilizing front leg, or back leg, is slidingly mobile and a second end, opposite the first end and in correspondence with which a respective stabilizing back leg, or front leg, is pivoted, so as to rotate around a corresponding axis of rotation, wherein each box-like element is provided with a respective tubular cavity defining a respective sliding axis along which one of said stabilizing front legs is slidingly moved, wherein each sliding axis of said stabilizing front legs intersects an axis of rotation of said movement turret, and each sliding axis of one of said stabilizing front legs intersects one of said axes of rotation of one of the stabilizing back legs wherein said support structure is formed by a single block suitable to define said box-like elements and said positioning seating of the movement turret; and wherein said support structure is cross shaped, in the center of which said positioning seating of the movement turret is positioned.

2. Mobile operating machine as in claim 1, wherein said positioning seating of the movement turret is made above said box-like elements and an axis of rotation of the movement turret passes through it.

3. Mobile operating machine as in claim 2, wherein said axis of rotation of the movement turret is substantially parallel to the axes of rotation around which said stabilizing back legs rotate.

4. Mobile operating machine as in any claim hereinbefore, wherein said first end and said second end of each box-like element are aligned with each other along the respective sliding axis of one of said stabilizing front legs.

5. Mobile operating machine as in any claim from 2 to 4, wherein said axis of rotation of said movement turret is substantially perpendicular to said sliding axes.

6. Mobile operating machine as in any claim hereinbefore, wherein said sliding axes are offset in height.

7. Mobile operating machine as in any claim hereinbefore, wherein said stabilizing front legs, or back legs, sliding in said box-like elements, comprise telescopic extension elements along said sliding axes.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) These and other characteristics of the present invention will become apparent from the following description of some embodiments, given as a non-restrictive example with reference to the attached drawings wherein:

(2) FIG. 1 is a plan view of a mobile operating machine with stabilizing legs according to the invention;

(3) FIG. 2 is a lateral view of the mobile operating machine in the working position of FIG. 1;

(4) FIG. 3 is a lateral view of a support structure of the stabilizing legs;

(5) FIG. 4 is a three-dimensional view of the support structure in FIG. 3;

(6) FIG. 5 is a plan view of the support structure of the stabilizing legs in the previous drawings;

(7) FIG. 6 is a section view of the support structure considered along the line VI-VI of FIG. 5.

(8) To facilitate comprehension, the same reference numbers have been used, where possible, to identify identical common elements in the drawings. It is understood that elements and characteristics of one embodiment can conveniently be incorporated into other embodiments without further clarifications.

DETAILED DESCRIPTION OF SOME EMBODIMENTS

(9) We will now refer in detail to the various embodiments of the present invention, of which one or more examples are shown in the attached drawings. Each example is supplied by way of illustration of the invention and shall not be understood as a limitation thereof. For example, the characteristics shown or described insomuch as they are part of one embodiment can be adopted on, or in association with, other embodiments to produce another embodiment. It is understood that the present invention shall include all such modifications and variants.

(10) In the attached drawings, see in particular FIG. 1 and FIG. 2, a mobile operating machine 10 according to the present invention is shown.

(11) The mobile operating machine 10 comprises a work device 11, at least a pair of front stabilizing legs 12a and 12b and at least a pair of back stabilizing legs 13a and 13b.

(12) The front and back stabilizing legs 12a and 12b, 13a and 13b can comprise telescopic elements 21 and 22 for resting on the ground, see also FIG. 4.

(13) The telescopic elements 21 and 22 can be associated with the front and back stabilizing legs 12a, 12b, 13a and 13b, each in correspondence with respective free terminal ends of the latter.

(14) The telescopic elements 21 and 22 can be telescopically slidable, to be made to rest on the ground, in a transverse direction, or orthogonal to the oblong development of the front and back stabilizing legs 12a, 12b, 13a and 13b with which they are associated.

(15) If the mobile operating machine 10 is a concrete pumping machine, the work device 11 can be, for example, an articulated arm for pumping concrete, shown in FIG. 1 and FIG. 2 in the lowered and inactive position.

(16) The work device 11 is supported and moved by a movement turret 14, able to allow at least one rotation thereof around an axis of rotation V, which can be substantially vertical during use.

(17) The mobile operating machine 10 also comprises a vehicle 15 provided with a driving cab 16 and a back frame 17, on which the work device 11 is positioned.

(18) The front and back stabilizing legs 12a, 12b, 13a and 13b are supported by a support structure 18, provided with at least one pair of box-like elements 19a and 19b which cross in a crossing zone Z.

(19) In particular, it can be provided that each box-like element 19a, 19b has an oblong development and is disposed transverse to and overlapping the other box-like element 19b, 19a, to define a cross shape.

(20) Each box-like element 19a, 19b is provided with a respective tubular cavity in which a respective front stabilizing leg 12a, 12b can be inserted slidingly, as described below.

(21) In accordance with possible embodiments of the invention, the box-like elements 19a, 19b can be defined by section bars having a polygonal cross-section, preferably rectangular. The front stabilizing legs 12a, 12b can have a cross-section shape substantially identical to that of the box-like elements 19a, 19b to allow their reciprocal sliding coupling.

(22) In accordance with possible solutions, each tubular cavity is at least open in correspondence with one of its first ends to allow the insertion and sliding of the respective front stabilizing leg 12a, 12b.

(23) The support structure 18 is provided, in the crossing zone Z of the box-like elements 19a and 19b, with a housing seating 20 to house the movement turret 14.

(24) The housing seating 20 defines a guide for the rotation of the movement turret 14 around the axis of rotation V.

(25) In particular, the support structure 18 is formed by a single block, for example made of sheet metal or suchlike, suitable to define the box-like elements 19a and 19b and the housing seating 20 of the movement turret 14.

(26) The support structure 18 can therefore be substantially cross-shaped, at the center of which the housing seating 20 of the movement turret 14 is positioned.

(27) The housing seating 20 of the movement turret 14 can have a cylindrical shape and is able to house at least a corresponding cylindrical part of the movement turret 14.

(28) The housing seating 20 of the movement turret 14 is positioned above the crossing zone Z of the box-like elements 19a and 19b.

(29) This positioning of the movement turret 14 allows to directly discharge the loads acting on the latter toward the box-like elements 19a, 19b, preventing deviations of the stress loading paths as occurs, for example, in known solutions.

(30) The axis of rotation V of the movement turret 14 is disposed at the center of the seating 20, hence substantially at the center of the movement turret 14.

(31) The front stabilizing legs 12a and 12b can be selectively inserted/extracted, by means of telescopic sliding, into/from the tubular cavity of the box-like element 19a, 19b to respectively assume an inactive position, retracted inside the tubular cavity, and an active position extended outside the tubular cavity, in which the operating machine is stabilized.

(32) In particular, each tubular cavity of the box-like elements 19a, 19b defines a respective sliding axis S1 and S2 along which the front stabilizing legs 12a, 12b are slidingly moved.

(33) In possible solutions, the front stabilizing legs 12a and 12b comprise extending telescopic elements 24a and 24b which, in the retracted position, are housed in a corresponding box-like element 19a and 19b of the support structure 18.

(34) Each box-like element 19a and 19b comprises a first end 23a and 23b which is open and is able to allow the front stabilizing legs 12a, 12b to enter and exit, that is, in this case the extending telescopic elements 24a and 24b of the front stabilizer legs 12a and 12b.

(35) The telescopic elements 24a and 24b of the front stabilizing legs 12a and 12b can be extended in the operating position by means of corresponding actuators 26a and 26b (FIG. 6).

(36) The telescopic elements 24a and 24b of the front stabilizing legs 12a and 12b are extendable or retractable along the sliding axes S1 and S2 which both pass through the crossing zone Z of the support structure 18.

(37) The sliding axes S1 and S2, even if offset in height, see for example FIG. 4, intersect at different heights the axis of rotation V of the movement turret 14, see FIG. 3 for example.

(38) The sliding axes S1 and S2, therefore ultimately also the box-like elements 19a and 19b, are offset in height so that the front stabilizing legs 12a and 12b, that is, their telescopic elements 24a, 24b, do not interfere with each other and therefore have the necessary space for sliding inside the corresponding box-shaped elements 19a and 19b of the support structure 18.

(39) Each box-like element 19a and 19b of the support structure 18 comprises a second end 25a and 25b, opposite the first end 23a and 23b, on which the back stabilizing legs 13a and 13b are pivoted, which therefore can rotate with respect to corresponding axes of rotation R1 and R2 from an inactive closed position to an open operating position, or vice versa.

(40) The back stabilizing legs 13a and 13b can be connected to the support structure 18 and in particular to the second end 25a and 25b of the box-like elements 19a and 19b by means of a rotation pin 27a and 27b defining an axis of rotation R1 and R2, for rotation of the back stabilizing legs 13a, 13b, see FIG. 4 or 5 for example.

(41) The back stabilizing legs 13a and 13b can pass from the closed inactive position to the open operating position by rotation around the axes of rotation R1 and R2.

(42) Corresponding actuators 28a and 28b can be connected to the back stabilizing legs 13a, 13b and to the support structure 18, to take the back stabilizing legs 13a, 13b from the inactive position to the active position, or vice versa.

(43) As can be observed in particular in FIG. 5, any one of the two sliding axes S1 and S2 of the telescopic elements 24a or 24b of the front stabilizing legs 12a or 12b is aligned with the axis of rotation R1 or R2 of the corresponding back stabilizing leg 13a or 13b.

(44) Therefore, the housing seating 20 for the movement turret 14 is made in the crossing zone Z in which the sliding axes S1 and S2 and thus the box-like elements 19a and 19b converge.

(45) According to a possible embodiment, the first end 23a, 23b and the second end 25a, 25b of each box-like element 19a, 19b are aligned with each other along the respective sliding axis S1, S2.

(46) According to another embodiment, each sliding axis S1, S2 intersects the axis of rotation V of the movement turret 14.

(47) According to another embodiment, each sliding axis S1, S2 of one of the front stabilizing legs 12a, 12b intersects one of the axes of rotation R1, R2 of one of the back stabilizing legs 13a, 13b, see the plan view in FIG. 5.

(48) In particular, this reciprocal disposition of the sliding axes S1 and S2 and of the axis of rotation V allows to distribute the mechanical loads induced by the movement turret 14 toward the front and back stabilizing legs in a uniform manner.

(49) In particular, the mechanical loads can be discharged from the center of the housing seating 20 toward the first ends 23a, 23b and toward the second ends 25a, 25b along a substantially radial path, with respect to the center of the housing seating 20. This prevents excessive deviations of the loads that can cause extremely high intensification of the stresses in correspondence with specific components, with consequent damage thereto.

(50) The positioning of the housing seating 20 of the movement turret 14 in the crossing zone Z of the box-shaped elements 19a and 19b of the support structure 18, so that any whatsoever of the axes of rotation R1 and R2 of the back stabilizing legs 13a and 13b is opposite, with respect to the seating 20, to any whatsoever of the two open ends 23a and 23b of the box-shaped elements 19a and 19b, confers great compactness on the support structure 18 and optimal distribution of the loads, consequent to the use of the front and back stabilizing legs 12a and 12b and 13a and 13b.

(51) As can be seen, advantageously, the opposite ends 23a and 23b and 25a and 25b of the box-like elements 19a and 19b can be disposed close together or in proximity to the housing seating 20 of the movement turret 14.

(52) By way of example only, it can be provided that the housing seating 20 has a substantially cylindrical conformation and that the opposite ends 23a, 23b, 25a, and 25b are located on the periphery and tangent to the housing seating 20.

(53) This disposition allows to further increase the compactness of the support structure 18 and further improve the distribution of loads, consequent to the use of the front and back stabilizing legs 12a and 12b and 13a and 13b.

(54) The distance between any one of the axes of rotation R1 or R2 of the back stabilizing legs 13a or 13b and the axis of rotation V of the movement turret 14 can also be substantially equal to the distance between the axis of rotation V and any one of the open ends 23a or 23b of the box-like elements 19a or 19b.

(55) Moreover, the axis of rotation V of the movement turret 14 can be substantially perpendicular to the sliding axes S1 and S2 of the telescopic elements 24a and 24b.

(56) The axis of rotation V of the movement turret 14 can also be parallel to the axes of rotation R1 and R2 of the back stabilizing legs 13a and 13b.

(57) The mobile operating machine 10 will naturally be equipped with service systems 29, for example an oil tank or other.

(58) Thanks to the compactness and the limited size of the support structure 18, the service systems 29 can be positioned outside the support structure 18, as shown schematically in FIG. 5.

(59) By way of example only, it can be provided that the box-like elements 19a, 19b define between them a concavity 30 comprised between the second ends 25a, 25b of the box-like elements 19a, 19b, and in which the service systems 29 can be installed in a selectively removable manner.

(60) In possible solutions, the support structure 18 can be provided with connection and support brackets 31, installed in the concavity 30 and configured to allow to connect and support the service systems 29.

(61) This solution allows to greatly simplify the step of allocating spaces with regard to service systems 29, and in particular an oil tank.

(62) The oil tank, unlike in known solutions, can be separate and independent from the support structure 18, which therefore has only a structural function.

(63) This solution for attaching the oil tank makes the construction of the support structure extremely simple compared with known solutions.

(64) It is clear that modifications and/or additions of parts can be made to the mobile operating machine as described heretofore, without departing from the field and scope of the present invention. It is also clear that, although the present invention has been described with reference to some specific examples, a person of skill in the art shall certainly be able to achieve many other equivalent forms of mobile operating machine, having the characteristics as set forth in the claims and hence all coming within the field of protection defined thereby.