ES2736286T3 - Support frame - Google Patents

Abstract

A support frame (1) for a hoisting apparatus, such as an aerial platform or the like, suitable for being mounted on a truck (2) or the like, comprising: a coupling assembly (11, 12) suitable for supporting in a manner rotating said apparatus; and a plurality of stabilizers (31, 32, 33, 34), each capable of extending and retracting along a respective extension axis (E); wherein said stabilizers (31, 32, 33, 34) are arranged on one side of a lateral surface (13) of said coupling assembly (11, 12), said extension shafts (E) do not intersect with said surface ( 13) lateral; wherein said stabilizers (31, 32, 33, 34) are arranged substantially tangential to said lateral surface (13) of the coupling assembly (11, 12); and wherein said coupling assembly (11, 12) comprises a base turret (11) that supports a rotating ring (12) that allows the rotation of said apparatus with respect to a rotation axis (V), said surface (13) being defined ) side of the assembly by the lateral periphery of the turret (11), said extension axes (E) are arranged in at least one plane perpendicular to said axis (V) of rotation; characterized in that said stabilizers (31, 32, 33, 34) are substantially coplanar and that the stabilizers (31, 32, 33, 34) are located contiguously, two by two in succession, around the coupling assembly (11, 12) and they are arranged in respective angular positions with respect to the axis (V) of rotation; one end of the envelope (310, 320, 330, 340) of each stabilizer (31, 32, 33, 34) is directly facing or in contact with a side surface of the envelope (310, 320, 330, 340) of a stabilizer (31, 32, 33, 34) different.

Description

DESCRIPTION

Support frame

Technical field

The present invention relates to a support frame for aerial platforms mounted on a truck or other similar lifting apparatus.

Prior art

Aerial platforms mounted on trucks equipped with a respective support frame mounted on a truck are known behind the driver's cab. The support frames comprise a rotating ring in which the boom that supports the platform basket is rotatably mounted.

The frames further comprise stabilizers, for example, of the telescopic type, hydraulically operated and designed to provide a base for the machine to rest during the operational phases.

In practice, during travel, the stabilizers are in a retracted configuration, in which they have the smallest lateral dimensions in relation to the direction of travel of the truck.

During the operating phases of the platform, the stabilizers are in an extended configuration, in which the stabilizer beams are removed from their casing and placed firmly on the ground, to allow the platform to perform its operations safely.

A known type of frame comprises two main beams, which are arranged perpendicular to the axle of the truck, and support respective telescopic stabilizers at the ends, for example, of an inclined type, said beams are joined by two struts.

One of these beams is placed immediately behind the cab, while the other beam is arranged behind the rear axle.

During the operational phases, the aforementioned struts are placed under high tension and, therefore, are properly sized; In addition, this type of frame often incorporates a counter frame to give it the required strength for the uses for which it is intended.

These aspects make the known framework very heavy and cumbersome, which, in addition to being a technological and economic disadvantage in itself, limits its use only to trucks of a suitable size.

In addition, the weight of the frame greatly affects the consumption of the vehicle.

In addition, as is well known, the degree of stability of this type of machine depends on the support area defined by the points where the stabilizer legs rest on the ground in the extended configuration.

In practice, these resting points define the corners of a flat figure; The higher this figure, the greater the stability of the vehicle during the phases of operation.

At present, in the market to which the invention relates, the need for support frames is felt that, without further increasing the weight, but decreasing it if possible, and taking into account the overall dimensional limits during the trip of the vehicle in which they are mounted, they make an available support area larger than the known frames.

Document US4407419 discloses a portable boom support for a vehicle provided with adjustable stabilizers placed at opposite longitudinal ends of the support, in respective vertical planes. A rotating trunk is placed in the center of the support.

EP2202121 describes "double X-shaped" support parts, provided in the chassis of a concrete pump vehicle. The support parts are placed under the rotating mechanism that is connected to a material distribution bar. RU2476372 discloses destruction equipment intended to clean debris in a disaster area. This equipment has a rotating platform mounted on a chassis, the latter formed by bars connected to posts.

Document CN103158682 describes a concrete pump truck equipped with a "X type cross" stabilizer structure, where the stabilizers cross each other and the turret is placed in front of them.

Object of the invention

The object of the present invention is, therefore, to provide a support framework that overcomes the disadvantages illustrated above of the prior art and satisfies the aforementioned market needs.

Brief description of the drawings

- Figure 1 is an axonometric view of a truck equipped with the frame of the invention constructed in accordance with a first embodiment;

- Figure 2 is a top view of the truck of figure 1, wherein the frame is in a first configuration; - Figure 3 is the view of Figure 2, in which the frame is in a different configuration;

- Figure 4 is an axonometric view of the truck in the previous figures, in which the frame of the invention is shown in exploded form;

- Figure 5 is an axonometric view of a truck equipped with the frame according to a second embodiment; - Figure 6 is a top view of the truck in Figure 5, in which the frame is in a first configuration; - Figure 7 is the view of Figure 6, in which the frame is in a different configuration; Y

- Figure 8 is an axonometric view of the truck of Figures 5-7, in which the frame is shown as an exploded.

Detailed description of preferred embodiments of the invention.

The "object of the present invention" mentioned is achieved by providing a support frame with all the technical characteristics, in combination, according to claim 1.

In the attached figures, two embodiments of the support frame are indicated as 1 and 10.

The proposed 1.10 frame is especially intended for use with an aerial platform mounted on a truck or similar lifting device.

In practice, the frame 1, 10 has been designed to be mounted on the chassis 20 of a truck 2, behind the driver's cabin 21.

The frame 1, 10 first includes a coupling assembly 11, 12 suitable to rotatably support the aerial platform, after reciprocal mechanical coupling thereof.

In detail, it is known that the platforms comprise a lifting arm like a boom of the crane that supports the basket.

The lower end of the boom is mounted on said coupling assembly 11, 12, so that it can be rotated around a vertical rotation V axis.

In the preferred embodiment of the invention, the coupling assembly 11, 12 comprises a base turret 11, intended to be integrally mounted with the chassis 20, which supports a turning ring 12 that allows the rotation of the aerial platform.

In addition to this structural function, turret 11 also acts as a passage for electrical cables and hydraulic conduits.

The turret 11 preferably has a closed lateral periphery that extends longitudinally in accordance with the rotation axis V mentioned above; even more preferably, said lateral periphery defines a cylindrical surface 13, coaxial with the rotation ring 12, whose surface 13 is arranged vertically during use.

The frame 1, 10 further includes a plurality of stabilizers 31, 32, 33, 34, preferably four and preferably identical to each other, each capable of extending and retracting along an axis E of respective extension.

In detail, the frame 1, 10 comprises a displacement configuration (shown in Figures 2 and 6), where all the stabilizers are retracted and occupy a minimum space, and an operational configuration (shown in Figures 3 and 7), in that they extend and are planted firmly in the ground to provide the stability required for the use of the aerial platform.

In particular, the stabilizers 31, 32, 33, 34 are preferably telescopic and hydraulically operated, and can be removed by command along an axis E of respective extension (see Figures 2, 3, 6 and 7).

The telescopic stabilizers 31, 32, 33, 34 each comprise a rectilinear 310, 320, 330, 340 casing, solidly associated with the coupling assembly 11, 12, in particular with said turret 11, and a shaft defined by a beam 311 , 321, 331, 341 rectilinear, which can be removed from and inserted into the respective envelopes 310, 320, 330, 340.

The stabilizers 31, 32, 33, 34 are preferably of the vertical type, that is, on one side, the extension direction E of the beams 311, 321, 331, 341 is horizontal and on the other side at the distal end of the same, the beams 311,321, 331, 341 are equipped with a vertical bar 41, 42, 43, 44, equally sliding on order, but in the vertical direction.

Said vertical bars 41, 42, 43, 44 are provided with legs at the lower free end thereof.

Vertical stabilizers are, in any case, known in themselves, although not in combination with the other components of the invention, and therefore will not be detailed further below.

According to an important aspect of the invention, the turret 11 and the turning ring 12 are centrally located in the frame 1, while the stabilizers 31, 32, 33, 34 are arranged substantially tangential to the lateral surface 13 of the turret eleven.

More generally, the stabilizers 31, 32, 33, 34 are arranged on one side of a lateral surface 13 of the coupling assembly 11, 12, with the extension shafts mentioned above that do not intersect the lateral surface 13.

Before proceeding with a detailed description of the structure of the frame 1, 10, it is worth briefly explaining some of the advantages of the configuration described above.

First, the proposed frame 1 does not require the struts, the beams and the counter frame of the prior art, which makes the invention lighter, less expensive and less cumbersome.

In addition, the frame 1 of the invention allows an additional travel length in the extension of the stabilizers 31, 32, 33, 34, thus increasing the stability of the machine during the operating phases.

In fact, as already explained, the larger the area of the flat figure defined in a plan view by the resting points of the stabilizers 31, 32, 33, 34 (practically speaking, the legs mentioned above), the greater will be Vehicle stability

Therefore, if the stabilizers 31, 32, 33, 34 have a longer extraction path, the resting points will be at a greater distance and, therefore, the area of the flat figure, a quadrilateral in this specific case , will be older.

The mentioned additional travel length is made possible by the fact that the stabilizers 31, 32, 33, 34 are tangential or, in any case, apart from the turret 11.

This aspect will be further examined and clarified in the description that follows, in which the first embodiment shown in Figures 1 to 4 and then the second embodiment are explained in detail.

In the first embodiment, the stabilizers 31, 32, 33, 34 are substantially coplanar, and preferably rest in a horizontal plane, transverse to the axis of rotation V mentioned above.

In particular, the stabilizers 31, 32, 33, 34 are located adjacent, two by two in succession, around the coupling assembly 11, 12, in which they are arranged in respective angular positions with respect to the axis V of rotation.

Preferably, the stabilizers 31, 32, 33, 34 are angularly equidistant.

In detail, the proximal end of the envelope 310, 320, 330, 340 of each stabilizer 31,32, 33, 34 is in contact with the lateral surface of the envelope 310, 320, 330, 340 of a different stabilizer, thus defining preferably a species of T.

In an alternative embodiment, not shown, said proximal end of each envelope 310, 320, 330, 340 is directly oriented, albeit at a distance, from the lateral surface of the envelope 310, 320, 330, 340 of a stabilizer 31, 32 , 33, 34 different.

In both cases, the extension axes of the stabilizers 31, 32, 33, 34 intersect and are preferably in mutually perpendicular pairs, so that the adjacent stabilizers 31, 32, 33, 34 are transverse thereto.

In practice, as shown in Figures 2 and 3, in each stabilizer 31, 32, 33, 34, and in particular in each envelope 310, 320, 330, 340, an adjacent portion 300 is defined between the mentioned proximal end above and the point where the envelope intersects the extension axis E of the adjacent stabilizer.

Said adjacent portion 300 is the portion that is directly next to the coupling assembly 11, 12, and in particular the turret 11, for the entire diametral extension thereof.

The intersection between stabilizers 31, 32, 33, 34 and, in particular, between their casings 310, 320, 330, 340, which are solidly connected to each other, defines an internal space, laterally delimited by said adjacent portions 300, which house the coupling assembly 11, 12 mentioned above.

In the preferred embodiment, this internal space is closed at the sides. According to an important, but not essential, aspect, the proposed frame 1 is mounted on the chassis 20 so that it interposes between the cab 21 and the rear axle of the truck 2 (see, for example, Figure 1).

This is possible thanks to the compact structure explained above in detail. Figure 4 also shows some optional components of the frame 1, in particular a pair of plates 5 interposing the beams 311, 321, 331, 341 of the stabilizers 31, 32, 33, 34.

In addition, the frame 1 can be mounted on the chassis 20 with an orientation such that the stabilizers 31, 32, 33, 34, and in particular the extension axes E thereof, are arranged obliquely with respect to the longitudinal axis A of the truck 2 ( see figures 2 and 3).

In detail, in the embodiment shown in the figures, the frame 1 comprises, in relation to the direction of travel, a front stabilizer indicated as 31, a rear stabilizer indicated as 33 and two lateral stabilizers indicated as 32 and 34.

In the displacement configuration of frame 1, shown in Figure 2, the distal ends of the stabilizers 31, 32, 33, 34 define, in a plan view (or from above), the vertices of a square with two parallel sides and two sides perpendicular to the longitudinal axis A of the truck 2.

In this configuration, the overall lateral dimensions in the truck 2, in relation to the direction of travel, are within the limits provided for this type of application.

In the operational configuration of frame 1, shown in Figure 3, the distal ends of the stabilizers define, in a plan view (or from above), the vertices of a square with sides that are oblique with respect to the A axis longitudinal. By virtue of having provided for the configuration of the stabilizers 31, 32, 33, 34 in the frame 1 and the orientation of the frame 1 in the truck 2, the invention allows to have a larger support or stabilization area compared to the technique previous, although it meets the dimensional limits during displacement.

In other words, the invention provides stabilizers 31,32,33,34 which, being equal the overall lateral dimensions in the displacement configuration, are equipped with a respective envelope 310, 320, 330, 340 longer than in the prior art and therefore it can accommodate a longer removable beam 311, 321, 331, 341.

Since the maximum displacement of the beams 311, 321, 331, 341 when extending from the respective casings 310, 320, 330, 340 is greater than that offered by the prior art, the rest or stabilization area is greater and, by Therefore, it is possible to provide greater stability to the vehicle.

In detail, seeing that the frame 1 is lighter and capable of providing greater stability, it can have particularly high aerial platforms mounted on it, even in small-sized trucks, of the type that are currently not used in this type of Applications for security reasons.

In addition, the invention also improves the performance characteristics of the aerial platform in terms of "operating radius," that is, allows increasing the horizontal distance of the basket from the so-called "rollover line."

This makes it possible, advantageously, to expand the potential market for this type of product, with savings for the buyer.

The second embodiment is described below with the help of Figures 5 to 8.

For the sake of simplicity and illustrative clarity, the numerical references attributed to the components of the frame 10 are the same as those used in reference to the first embodiment and the characteristics shared by the two embodiments as illustrated above.

The frame 10 of this second embodiment has the same advantages as those of the first embodiment, but allows a greater additional travel length of the stabilizers 31, 32, 33, 34.

In fact, in this second embodiment, the stabilizers 31, 32, 33, 34 are arranged in at least two parallel planes which, during use, are preferably horizontal.

In the case of four stabilizers 31, 32, 33, 34, they can be arranged in two planes at different heights, so that the stabilizers 31,32, 33, 34 in the same plane are parallel and the stabilizers 31,32, 33, 34 in different planes are perpendicular.

The upper stabilizers 31, 33 can be placed directly in contact with the lower stabilizers 32, 34.

In the specific example shown, the beams 311, 321, 331, 341 of the stabilizers together adopt a configuration that resembles a "control mark".

In practice, the upper beams 31, 33 intersect with the lower beams 32, 34 in such a way that they define an internal space similar to that of the first embodiment, limited laterally by adjacent portions 300, and housing the assembly 11, 12 of coupling mentioned above.

Also in this case, the internal space is closed on the sides.

The spacing between the upper beams is preferably equal to that of the lower beams.

In this embodiment, the proximal portion of the envelope 310, 320, 330, 340, beyond the adjacent portion 300, that is, the section that is as long as the diameter of the turret 11 and placed directly on the side of the It also includes a projection portion 301, which comprises the free end of the beam 311, 321, 331, 341.

Thanks to this aspect, the envelope 310, 320, 330, 340 can be even longer, not only in the prior art, but also in the first embodiment.

This allows an additional travel length of the removable beam 311, 321,331, 341 and, therefore, also a greater stabilization area for the frame 10.

It should be noted that, in the preferred embodiment depicted in the figures, each pair of parallel stabilizers arranged in the same plane has beams that are removed in opposite directions.

In practice, the moving ends of the beams 311, 321, 331, 341, which, as explained above, support a vertical arm endowed with a leg, face in opposite directions.

In other words, the vertical bars are located in opposite middle spaces defined by a vertical plane that is halfway to the length of the envelopes 310, 320, 330, 340.

Similar to the first embodiment, and with the same advantages, the frame 10 of the second embodiment is mounted on the chassis 20 to interpose between the cab 21 and the rear axle of the truck 2 (see for example Figure 5), with an orientation such that the stabilizers 31, 32, 33, 34, and in particular their axes of extraction thereof are arranged obliquely with respect to the longitudinal axis A of the truck 2 (see figures 6 and 7).

This allows the results already explained in relation to the first embodiment in terms of limiting the overall dimensions in the frame offset configuration (see figure 6) and in terms of the support area in the operational configuration (see figure 7).

It should be noted that the frame 10 according to the second embodiment may include the optional components of the frame 1 of the first embodiment, and in particular the pair of plates 5 interposing the beams 311, 321, 331, 341, is shown only in the figure 4.

In both embodiments, the rotation ring 12 is disposed in a horizontal plane that defines a lower half space comprising the stabilizers 31, 32, 33, 34 and an upper half space that includes the platform.

Other advantages of the invention, in addition to those explained above, are associated with the fact that the compact configuration and light weight of the frame 1 of the invention allow shipping costs to be significantly reduced.

In addition, frame 1, 10 can be offered on the market as a unit by itself, which not only simplifies shipping logistics, reducing delivery times, but also allows frame 1, 10 to be able to assembling and disassembling the chassis 20 of a truck 2 very easy and fast, for example, by simple screwing.

This also serves to significantly reduce the training costs of the staff working for the buying companies.

Claims (7)

1. A support frame (1) for a hoisting apparatus, such as an aerial platform or the like, suitable for being mounted on a truck (2) or the like, comprising: a coupling assembly (11, 12) suitable to rotatably support said apparatus; Y a plurality of stabilizers (31, 32, 33, 34), each capable of extending and retracting along a respective extension axis (E); wherein said stabilizers (31, 32, 33, 34) are arranged on one side of a lateral surface (13) of said coupling assembly (11, 12), said extension shafts (E) do not intersect with said surface ( 13) lateral; wherein said stabilizers (31,32, 33, 34) are arranged substantially tangential to said lateral surface (13) of the coupling assembly (11, 12); Y wherein said coupling assembly (11, 12) comprises a base turret (11) that supports a rotating ring (12) that allows the rotation of said apparatus with respect to a rotation axis (V), said surface (13) being defined lateral of the assembly by the lateral periphery of the turret (11), said extension axes (E) are arranged in at least one plane perpendicular to said axis (V) of rotation; characterized in that said stabilizers (31, 32, 33, 34) are substantially coplanar and that the stabilizers (31, 32, 33, 34) are located contiguously, two by two in succession, around the coupling assembly (11, 12) and they are arranged in respective angular positions with respect to the axis (V) of rotation; one end of the envelope (310, 320, 330, 340) of each stabilizer (31, 32, 33, 34) is directly facing or in contact with a side surface of the envelope (310, 320, 330, 340) of a stabilizer (31,32,33,34) different. 2. The frame (1) according to at least one of the preceding claims, wherein each stabilizer (31, 32, 33, 34) comprises a wrapper (310, 320, 330, 340) in which a beam (311 , 321, 331, 341) is slidably inserted, said envelope (310, 320, 330, 340) having a lateral surface directly facing or in contact with said lateral surface of the coupling assembly (11, 12). 3. The frame (1) according to at least one of the preceding claims, comprising four stabilizers (31, 32, 33, 34) in parallel two by two. 4. A vehicle (2) for transporting a hoisting apparatus, such as an aerial platform or the like, comprising: a truck (2) provided with a cabin (21) and a chassis (20); and a frame (1) according to at least one of the preceding claims, mounted on the chassis (20) behind the cab (21). 5. The vehicle (2) according to the preceding claim, wherein the stabilizer extraction shafts (31, 32, 33, 34) are arranged obliquely with respect to the longitudinal axis (A) of the truck (2). 6. The vehicle (2) according to claim 4 or claim 5, wherein the frame (1) is disposed between the cab (21) and the rear axle of the truck (2). 7. The vehicle (2) according to at least one of claims 5 or 6, wherein the frame (1) has a first configuration in which the distal ends of the stabilizers (31, 32, 33, 34) define the vertices of a square with two parallel sides and two sides perpendicular to the longitudinal axis (A) of the truck (2) and a second configuration in which the distal ends of the stabilizers (31, 32, 33, 34) define the vertices of a square with sides that are oblique in relation to said longitudinal axis (A).