DE102021111242A1 - Support device for a truck-mounted concrete pump - Google Patents

Abstract

The invention relates to a support device for a truck-mounted concrete pump, which includes a frame and at least one front pivoting leg and at least one rear pivoting leg. The pivoting legs are articulated to the frame so that they can pivot relative to one another, with the front pivoting leg being designed to be telescopic. The front pivot leg includes a pivot portion pivotally mounted on the frame with at least one telescoping portion slidably mounted therein. The latter can be stored at least partially in a recess of the rear pivoting leg in a telescoped state. According to the invention, the telescopic section of the front pivoting leg comprises a locking means, by means of which the telescopic section can be fixed or locked in a pivoted-in and telescoped-in position (first position) relative to the rear pivoting leg and can be fixed or locked in a telescoped-out position (second position) relative to the pivoting section . In the second position, the front pivot leg can be pivoted and/or pivotable relative to the rear pivot leg. The invention also relates to a set consisting of a front and a rear pivoting leg of a support device according to the invention and a truck-mounted concrete pump with a support device according to the invention.

Description

The present invention relates to a support device for a truck-mounted concrete pump according to the preamble of claim 1, a truck-mounted concrete pump with such a support device and a set with a front and a rear swivel leg.

Truck-mounted concrete pumps known from the prior art have a support device in order to divert the loads of the placing boom and any other forces acting on the truck-mounted concrete pump into the subsoil. Usually, such support devices comprise two pairs of mutually pivotable pivoting legs, which are articulated laterally to a support structure (usually the mast block or a structure connected thereto) of the truck-mounted concrete pump and have support cylinders at their ends. At least one of the swiveling legs can usually be swiveled out to the side as well as telescoped in order to achieve the required length for stable support with a compact design at the same time.

When the truck-mounted concrete pump is being driven, the pivoting legs are in a swiveled-in and telescoped state, usually behind a driver's cab of the truck-mounted concrete pump. Due to the compact design, the retracted and pivoted telescopic sections of the pivoting legs usually require space in the other pivoting leg. For this purpose, it is known that the non-telescopic pivoting legs are fork-shaped and have recesses open towards the pivot axis, in which the telescopic sections of the telescopic pivoting legs can be accommodated in the retracted state.

So that the pivoting legs do not unintentionally swing out and/or telescope out when driving due to inertial forces, they are typically locked to one another for driving via a locking device. Furthermore, each telescoping pivoting leg has a further locking device which, during operation, prevents the pivoting legs from retracting unintentionally as a result of the forces acting on the supporting device.

Up until now, separate locking devices have been provided for the locking functions mentioned above, which is expensive and increases the overall weight of the truck-mounted concrete pump.

The object of the present invention is therefore to provide a simpler and more cost-effective locking device for the supporting device of generic truck-mounted concrete pumps.

According to the invention, this object is achieved by a support device having the features of claim 1. Advantageous embodiments of the invention result from the dependent claims and the following description.

Accordingly, a support device for a truck-mounted concrete pump is proposed, which comprises a frame and at least one front pivoting leg and at least one rear pivoting leg. The pivoting legs are articulated to the frame so that they can pivot relative to one another, with the front pivoting leg being designed to be telescopic. The front pivot leg includes a pivot portion pivotally mounted on the frame with at least one telescoping portion slidably mounted therein. The latter can be stored at least partially in a recess of the rear pivoting leg in a telescoped state.

The term "pivotally attached to the frame relative to one another" is to be interpreted broadly and does not imply that the pivot axes must coincide or that the pivot legs are directly connected. It is also conceivable that both pivoting legs are linked to the frame via separate pivoting axes. In particular, the two pivoting legs can be pivoted independently of one another in the unlocked state.

According to the invention, the telescopic section of the front pivoting leg includes a locking means, by means of which the telescopic section can be fixed or locked in a pivoted-in and telescoped-in position (hereinafter: first position) relative to the rear pivoting leg, and in a telescoped-out position (hereinafter: second position) relative to the Pivoting section can be determined or locked. In the second position, the front pivoting leg can be pivoted and/or pivotable relative to the rear pivoting leg. The second position can correspond to a fully or almost fully telescoped state of the front swivel leg.

According to the invention, it is therefore provided that both the locking of the two pivoting legs as a whole to one another for driving operation (first position) and the locking of the telescopic section with the pivoting section (i.e. not with the rear pivoting leg) are carried out using the same locking means, which is arranged on the telescopic section and is moved with it. This locking means thus fulfills a dual function and takes over the tasks of the previous separate locking devices. As a result, per pivoting leg pair (comprising a rear and front pivoting leg) a locking means, for example wise a locking cylinder, can be saved, which reduces the overall weight and costs of the support device.

In a possible embodiment it is provided that in the state fixed or locked in the first position, the two pivoting legs cannot be pivoted relative to one another and the front pivoting leg cannot be telescoped. In this position, the swivel legs are secured for driving on the truck-mounted concrete pump and cannot swivel out to the side. In the established or locked state in the second position, the front pivoting leg cannot be telescoped, but it can be pivoted with respect to the rear pivoting leg. In this position, the pivoting and telescopic sections are locked or locked together, while the front pivoting leg is not fixed or locked in relation to the rear pivoting leg. This locked second position relates to the working operation of the truck-mounted concrete pump, during which it is to be ensured that the front pivoting legs do not telescope in due to the loads that occur.

In a further possible embodiment it is provided that the pivoting section and the rear pivoting leg each comprise a counter-fixing means, wherein the fixing means can be brought into engagement with the counter-fixing means of the rear swiveling leg in the first position and can be brought into engagement with the counter-fixing means of the pivoting section in the second position is. The counter-fixing means are in particular fixedly arranged on the rear pivoting leg and on the pivoting section of the front pivoting leg, while the fixing means moves with the telescopic section. Depending on the position of the telescopic section, it can lock with the first or the second counter-fixing means. The locking and counter-locking means can be bolts/projections and recesses/bores.

In a further possible embodiment it is provided that the locking means can be actively actuated. In particular, it can be locked and/or unlocked by active actuation. Provision can also be made for the locking/unlocking to take place automatically, e.g. mediated by a spring, with corresponding overlap with one of the counter-locking means, while the unlocking/locking must be actively initiated by actuating the locking means accordingly. The latter is preferably a blocking cylinder which can be actuated hydraulically in particular (ie a hydraulic cylinder).

In a further possible embodiment it is provided that the counter-fixing means are passive elements into which the fixing means can be introduced. The counter-fixing means can be designed as recesses, preferably as bores.

In a further possible embodiment it is provided that the pivoting legs are articulated on the frame pivotably about a common vertical axis, preferably via a two-part pivoting pin. The latter may comprise upper and lower pivot pin parts which are coaxial and spaced from each other. As a result, the telescopic section can penetrate the pivot axis in a retracted state and be pivoted through the recess of the rear pivot leg. This enables a very compact structure. Alternatively, the front and rear pivoting legs can also be pivoted to the frame about two axes lying close to one another, which are also preferably realized by two-part pivoting pins. "Close to each other" can be interpreted in such a way that the distance between the axes is smaller than the longest part of the telescopic section that projects backwards over the pivoting section.

In a further possible embodiment it is provided that only a single fixing means is provided. This is particularly true in an embodiment where there is only a single pair of pivot legs. Alternatively, the support device can comprise at least two front and two rear swivel legs. In this case, only one locking means can be provided for each pair of front and rear pivoting legs, which are arranged in particular on the side of the frame.

In a further possible embodiment it is provided that the fixing means is located in the area of the rear end of the telescopic section, which is mounted in the first position within the rear pivoting leg. In the second position, the end of the telescopic section is located within the swiveling section and the locking means can be brought into overlap with a corresponding counter-locking means of the swiveling section. In the first position, the end of the telescopic section is outside of the pivoting section, so that when it is pivoted in, it is within the recess of the rear pivoting leg and can be overlapped there with a corresponding counter-fixing means of the rear pivoting leg.

The present invention also relates to a set of a front swivel leg and a rear swivel leg of a support device according to the invention. These are on a frame can be mounted on a truck-mounted concrete pump. This obviously results in the same advantages and properties as for the supporting device according to the invention, which is why a repeated description is dispensed with.

The present invention also relates to a truck-mounted concrete pump with a support device according to the invention. This obviously results in the same advantages and properties as for the support device according to the invention, which is why a repeated description is dispensed with at this point.

Preferably, the truck-mounted concrete pump comprises two pairs of a front and a rear swivel leg, which are hinged to the frame on opposite sides. Preferably, the pivot leg pairs are pivoted about a common vertical axis to the frame, in particular via two-part pivot bolts as described above.

In one possible embodiment, the truck-mounted concrete pump includes a placing boom that can rotate about a vertical axis and is arranged on a mast bracket, with the mast bracket enclosing the frame or being connected to it. The distributor boom can comprise a number of segments that can be swiveled relative to one another, along which a concrete line is routed. The forces occurring during operation of the truck-mounted concrete pump are transmitted to the subsoil via the placing boom and the boom support or the frame as well as via the support device.

• 1: ein Ausführungsbeispiel der erfindungsgemäßen Abstützvorrichtung in der ersten Stellung in einer seitlichen Längsschnittansicht;
• 2: die Abstützvorrichtung mit seitlich ausgeschwenktem vorderem Schwenkbein in einer Draufsicht;
• 3: eine seitliche Schnittansicht im Bereich des Sperrzylinders, wobei sich das vordere Schwenkbein in der ersten Stellung befindet;
• 4: eine seitliche Schnittansicht im Bereich des Sperrzylinders, wobei sich das vordere Schwenkbein in der zweiten Stellung befindet;
• 5: eine perspektivische Ansicht des vorderen Schwenkarms; und
• 6: eine perspektivische Ansicht der Abstützvorrichtung gemäß einem Ausführungsbeispiel;

Further features, details and advantages of the invention result from the exemplary embodiments explained below with reference to the figures. Show it:

• 1 : an embodiment of the supporting device according to the invention in the first position in a lateral longitudinal sectional view;
• 2 : the support device with the front swivel leg swiveled out to the side in a plan view;
• 3 Fig. 1 is a sectional side view in the area of the locking cylinder, with the front pivoting leg in the first position;
• 4 Fig. 1 is a sectional side view in the area of the locking cylinder, with the front pivoting leg in the second position;
• 5 : a perspective view of the front swivel arm; and
• 6 : a perspective view of the support device according to an embodiment;

the 1 shows an embodiment of the support device according to the invention, the pivoting legs 10, 12 of which are in the first position, in a lateral sectional view along the longitudinal axes of the pivoting legs 10, 12. An overall view of the supporting device with two pairs of pairs of pivoting legs 10, 12 articulated laterally to a frame 26 is in the 6 shown in a perspective view.

The support device comprises a rear pivoting leg 12 which is pivotable about a vertical axis 20 on one in the 1 frame 26, not shown, is articulated and not telescoping, and a front pivoting leg 10, which is pivoted about the same axis 20 on the frame 26 and is also telescoping (e.g. by means of a hydraulic cylinder). The front pivoting leg 10 comprises a pivoting section 14, which is articulated to the frame 26 and can also be referred to as a slide-out box, and a telescopic section 16 which is movably mounted therein.

At the end spaced apart from the axis 20, the telescopic section 16 has a support cylinder 22, which can be retracted and extended vertically, in particular hydraulically. The rear pivoting leg 12 has at its end spaced apart from the axis 20 such a support cylinder 22, which in the 1 however, is not shown (see 6 ). By extending the support cylinders 22, the frame 26 and a chassis of the truck-mounted concrete pump connected to it can be lifted off the ground so that it only rests on the ground via the support device.

In the first position, which in the 1 As shown, the telescoping portion 16 is fully retracted within the pivoting portion 14 and extends rearwardly beyond the latter. The pivoting legs 10, 12 are aligned parallel or coaxial to one another (with respect to their longitudinal axes). The rear pivot leg 12 has an elongated recess 18 which is open towards the axis 20 and receives the rear part of the telescopic section 16 . The recess 18 is also open to the sides (the portion of the rear pivot leg 12 which has the recess 18 is therefore forked, wherein the fork depth may be less than, more than or substantially half the length of the rear pivot leg), so that the front pivoting leg 10 can in principle be pivoted relative to the rear pivoting leg 12 even in the retracted state. However, whether this is actually possible depends on the geometry of the frame 26 . The latter is advantageously designed in such a way that the front pivoting leg 10 is pivoted out to the side and the part of the telescopic section 16 that protrudes to the rear is inward can be swiveled (see 6 for a possible frame shape).

The two swivel legs 10, 12 are connected via a two-part swivel pin 24 (see 6 ) is pivoted to the frame 26 with the upper and lower pivot pin portions 24 coaxially bearing in respective pin receptacles of the pivot legs 10,12. Again 1 As can be seen, the bolt receptacles of the front pivoting leg 10 lie within the bolt receptacles of the rear pivoting leg 12. However, geometries are also conceivable in which the bolt receptacles of the upper and/or lower pivoting bolt parts are at the same height or the bolt receptacles of the rear pivoting leg 12 are within the bolt receptacles of the front pivot leg 10 lie.

At the rear end of the telescopic section 16, an actively actuated locking means 30 is firmly arranged, which in the exemplary embodiment shown here is a hydraulic locking cylinder 30, which includes a locking pin that can be retracted and extended. The locking cylinder 30 is located on the upper side of the telescopic section 16 and, in the first position shown here, in which the front pivoting leg 10 is fully retracted and pivoted in, covers a bore 32, which acts as a first counter-fixing means and which is in the upper side of the recess 18 of the rear pivoting leg 12 is formed. Of course, the locking means 30 and the first counter-locking means 32 can also be arranged at a different location, e.g. on the underside of the telescopic section 16 and the recess 18 or on one of the sides.

In order to lock or lock the pivoting legs 10, 12 together in the first position, the locking bolt is extended so that it enters or bolts into the bore 32. The front pivoting leg 10 can then no longer be pivoted out or telescoped out, so that the pivoting legs 10, 12 are secured to the truck-mounted concrete pump for driving operation.

the 2 shows a top view of the front swivel leg 10, which is swung out laterally relative to the rear swivel leg 12 and is still in the retracted state. The arrow labeled with the reference number 30 marks the position of the locking bolt 30 which moves with the telescopic section 16 . It can also be seen that the retracted telescopic section 16 protrudes into the installation space of the truck-mounted concrete pump, which is below the in FIG 2 shown swivel legs 10, 12 is located. The frame arranged there preferably therefore has corresponding recesses.

the 3 and 4 show lateral longitudinal sectional views of the telescopic section 16 in the area of the locking cylinder 30, the front pivoting leg 10 being in the first position ( 3 ) or in the second position ( 4 ) is located.

In the 3 the bore 32 can be seen in the recess 18 of the rear pivoting leg 12, below which the locking cylinder 30 is located. Retracting or extending the locking pin locks or unlocks the pivoting legs 10, 12.

In the 4 the telescopic section 16 is fully extended so that the rear end with the locking cylinder 30 is inside the pivoting section 14 . The central recess of the pivoting section 14, in which the telescopic section 16 is slidably mounted, also has a bore 34 on the upper side in the region of the end opposite the axis 20, which acts as a second counter-fixing means 34. In the second position, in which the telescopic section is completely telescoped out, the locking cylinder 30 is opposite this bore 34 . Retracting or extending the locking bolt locks or unlocks the telescopic section 16 and the pivoting section 14, while a pivoting movement of the front pivoting leg 10 relative to the rear pivoting leg 12 is possible.

the 5 shows a single front swivel leg 10 according to an embodiment in a fully telescoped state in a perspective view, with the locking means 30 not being shown here.

the 6 shows an overall view of the supporting device with two pairs of pairs of pivoting legs 10, 12 articulated laterally on the frame 26 in a perspective view. The front swivel legs 10 are swung out to the side and fully telescoped out. The fork shape of the rear pivoting legs 12 resulting from the recess 18 is clearly visible. Furthermore, the positions of the pivot pin parts 24, which form the pivot axes 20, are located. An auxiliary frame is located between the rear pivoting legs 12 and is connected to the frame 26 via diagonally extending tie rods, among other things. The subframe and tie rods may be considered part of the frame 26 for purposes of the present invention.

reference list

10

Front swivel leg

12

Rear pivot leg

14

pivot section

16

telescopic section

18

recess

20

axis

22

support cylinder

24

pivot pin

26

frame

30

Locking device (locking cylinder)

32

counter-locking means (hole)

34

counter-locking means (hole)

Claims (10)

Support device for a truck-mounted concrete pump, comprising a frame, at least one front pivoting leg (10) and at least one rear pivoting leg (12), the pivoting legs (10, 12) being articulated on the frame so that they can pivot relative to one another, the front pivoting leg (10) being telescopic and a pivoting section (14) mounted pivotably on the frame with at least one telescoping section (16) mounted displaceably therein and wherein the telescoping section (16) can be stored at least partially in a recess (18) of the rear pivoting leg (12) in a telescoped-in state, thereby characterized in that the telescopic section (16) comprises a locking means (30) by means of which the telescopic section (16) can be locked in a pivoted-in and telescoped-in first position relative to the rear pivoting leg (12) and in a telescoped-out second position relative to the pivoting section (14). . support device claim 1 , wherein in the fixed first position the two pivoting legs (10, 12) cannot be pivoted relative to one another and the front pivoting leg (10) cannot be telescoped and wherein in the fixed second position the front pivoting leg (10) cannot be telescoped but can be rotated relative to the rear pivoting leg ( 12) can be pivoted. support device claim 1 or 2 , wherein the pivoting section (14) and the rear pivoting leg (12) each comprise a counter-fixing means (32, 34), wherein the fixing means (30) in the first position with the counter-fixing means (32) of the rear pivoting leg (12) and in the second Position with the counter-locking means (34) of the pivoting portion (14) can be brought into engagement. Supporting device according to one of the preceding claims, in which the fixing means (30) can be actively actuated, the fixing means (30) preferably being a blocking cylinder which can in particular be actuated hydraulically. Support device according to claims 3 and 4 , the counter-fixing means (32, 34) being passive elements, preferably recesses, particularly preferably bores, into which the fixing means (30) can be introduced. Supporting device according to one of the preceding claims, in which the pivoting legs (10, 12) are articulated on the frame so as to be pivotable about a common vertical axis (20), preferably via a two-part pivot pin. A stabilizer according to any one of the preceding claims wherein only one locking means (30) is provided or wherein the stabilizer comprises at least two front and two rear pivot legs (10,12) and only one for each pair of front and rear pivot legs (10,12). Locking means (30) is provided. A stabilizer according to any one of the preceding claims, wherein the locking means (30) is located in the region of the rear end of the telescoping section (16) which in the first position is stored within the rear pivot leg (12). Set comprising a front swivel leg (10) and a rear swivel leg (12) of a support device according to any one of the preceding claims. Truck-mounted concrete pump with a support device according to one of Claims 1 until 8th , wherein the truck-mounted concrete pump preferably comprises two pairs articulated on opposite sides of the frame, each consisting of a front and a rear pivoting leg (10, 12) and/or a mast pedestal surrounding or connected to the frame and having a placing boom.

Images