DE202009013049U1 - mobile crane - Google Patents

Abstract

Vehicle crane with a rotatable crane column (2), to which a first extension arm (3), which can be moved around a first pivot axis (6), is articulated and at least one second extension arm pivotable about a second pivot axis (7) on the first extension arm (4) Jibs are hinged to each other, characterized in that a third arm (5) is provided, which is articulated about a third pivot axis (8) on the second arm and the first pivot axis (6) perpendicular to the second pivot axis (7) is aligned.

Description

The The invention relates to a vehicle crane with a rotatable crane column.

In The forestry technology is between a back crane and a Charging crane differentiated. The loading crane is usually for loading round logs of up to 6 m onto a vehicle used. A back crane is used to round logs from up to 30 m behind a vehicle. Both crane types are also used to remove the roundwood from the forest to move on a drivable forest road. The difference between loading crane and back crane is thus above all in the reach of the crane system, which is considerably larger with a loading crane is. But would you have a loading crane as a back crane If you use the problem that the vehicle at the Back process would rise up front. The consequence the upgrade is the loss of steering ability, so the wooden back is not possible. A Limited improvement of this situation can be achieved by: A counterweight is attached to the front of the vehicle.

Of the The invention is therefore based on the object of specifying a vehicle crane, used as a loading crane as well as a reverse crane being on the one hand a great reach in his Function is given as a loading crane and on the other hand, the steering ability of the vehicle remains in the function as a rear crane.

According to the invention this object is achieved by the features of claim 1.

Of the Vehicle crane according to the invention essentially exists from a rotatable crane column, at the one to a first Pivot axis pivotable first arm is hinged and at least a pivotable about a second pivot axis on the first arm second boom, wherein the two arms are hinged to each other are. Furthermore, a third arm is provided, which is a third pivot axis is articulated on the second arm. Further is aligned the first pivot axis perpendicular to the second pivot axis.

Further Embodiments of the invention are the subject of the dependent claims.

Although foldable mobile cranes are well known in practice, but the collapsibility of the two arms only serves to allow the most space-saving accommodation of the crane in the transport position. Such a crane is for example from the DE 20 2005 016 267 U1 known. Here, the two pivot axes of the boom are aligned parallel to each other, so that the two arms are arranged approximately Z-shaped in the folded state of the crane.

By the vertical alignment of the invention second pivot axis compared to the first pivot axis of the Vehicle crane occupy at least two working positions, wherein in the first working position, the first and second boom parallel are juxtaposed while the second boom in the second working position an extension of the first Jib forms. In this second working position, the crane can its Function as a loading crane exercise while in the first working position can work as a reverse crane.

In the back crane position, the two extend to each other folded boom on one side away from the crane column, while the third boom from the crane column extends substantially to the opposite side. The two folded arms thus form a counterweight, which counteracts the upgrade of the vehicle and thus the Steerability of the vehicle is maintained.

Of the first and second boom can also be formed be that they can be used in intermediate positions. The two arms are at least in the two extreme positions locked or locked to each other.

In An embodiment of the invention is for pivoting the first arm about the first pivot axis, a first lifting cylinder and for pivoting the third arm about the third pivot axis, a second lifting cylinder intended. The pivoting of the second arm about the second pivot axis can also without hydraulic cylinder, d. H. executed manually become. This is especially sufficient if the two Boom only in their folded or unfolded Position can be used. However, if also intermediate positions should be taken, a hydraulic cylinder is appropriate.

In the folded position are the first and the second Booms arranged side by side in parallel, while the Third boom is aligned so that it is in one through the second and third boom formed plane with respect to the second Boom is pivotable. This third boom can in particular be designed as a telescopic arm to increase the range.

According to one Another embodiment of the invention is the crane column formed so high that the pivoting range at least 360 °, preferably at least 400 °.

Further advantages and embodiments of Invention will be explained in more detail below with reference to the description and the drawings.

In show the drawing

1 a side view of a vehicle with a crane in the rear crane position,

2 a top view of the vehicle crane in the return position,

3 a side view of a vehicle with a crane in the loading crane position and

4 a plan view of the vehicle crane in the loading crane position.

In the 1 and 2 is that on a vehicle 1 mounted crane in his rear crane position shown. The mobile crane essentially consists of a rotatable crane column 2 , a first boom 3 , a second boom 4 and a third arm designed as a telescopic arm 5 , The first boom is about a first pivot axis 6 hinged on the crane column. The second boom 4 is about a second Schenkachse 7 on the first boom 3 pivotable. The third boom 5 is also about a third pivot axis 8th on the second boom 4 hinged. At the end of the third boom 5 is a gripper 9 assembled.

To swing the first boom 3 around the first pivot axis 6 is a first lift cylinder 12 and for pivoting the third boom 5 around the third pivot axis 8th is a second lifting cylinder 13 are provided.

A peculiarity of the first and second boom 3 . 4 formed pivot mechanism is that the second pivot axis 7 perpendicular to the first pivot axis 6 is trained. In this way come the first and second boom 3 . 4 collapse parallel next to each other, as in 2 is apparent. In this position, you can then either automatically or manually by a suitable locking device 10 be arrested.

In this position, the first pivot axis 6 and the third pivot axis 8th formed parallel to each other.

Like from the 1 and 2 can be seen, extend the two folded arms 3 . 4 on one side of the crane column 2 away while the third boom 5 extends from the crane pillar substantially to the opposite side. Thus, after the crane pillar is usually located in the rear of the vehicle and the work area of the third boom in the rear crane function covers the area behind the vehicle, the two folded first and second boom extend to the front end of the vehicle. For this purpose, the crane column 2 formed so high that the first and second boom above the vehicle cab 1 can extend to the front. The first and second boom thus forms a counterweight, which shifts the center of gravity of the entire vehicle forward and thereby increases the pressure on the front axle accordingly. In this way, sufficient steerability of the vehicle is ensured even with the usual back crane work. In addition, also a suitable weight at the front end of the vehicle 1 be attached.

By an appropriate design of the telescopic third boom 5 the mobile crane has a range of, for example, 7 m.

The known from practice loading cranes usually have a range of up to 10 m. This range is achievable with the vehicle crane described above, by the first and second boom 3 . 4 in the unfolded position according to 3 and 4 is brought. In this loading crane position, the second boom forms an extension of the first boom, so now all three arms extend away in the same direction of the crane column and a range of, for example, 10 m is reached.

For locking the first and second arm 3 . 4 in the 3 and 4 illustrated loading crane position is in turn a suitable locking device 11 , For example, provided in the form of a bolt. If the crane is used as a loading crane, the vehicle is usually stationary, so that insufficient ground pressure in the front of the vehicle is irrelevant. In addition, the durability of the vehicle can be increased, for example, by lowering a rear-mounted shield or the like.

The first and second boom 3 . 4 are 180 ° about the second pivot axis 7 pivotable to pivot the two arms in one of the two end positions. In the context of the invention, it is quite conceivable that the two booms are brought to perform crane work in an intermediate position. For this purpose, it is expedient if a suitable actuating cylinder is provided for the pivoting operation.

The swivel range of the crane column 2 is at least 360 °, preferably at least 400 ° to meet every conceivable purpose can.

While usually for the function as a loading crane on the one hand and as a rear crane on the other hand two appropriately equipped vehicles required or one of the two functions only with limitation can be executed, knows the above-described vehicle crane perform both functions without any restriction.

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• - DE 202005016267 U1 [0007]

Claims (11)

Mobile crane with a rotatable crane column ( 2 ), at the one about a first pivot axis ( 6 ) disposable first cantilever ( 3 ) and at least one on the first boom ( 4 ) about a second pivot axis ( 7 ) pivotable second boom, wherein the two arms are hinged to each other, characterized in that a third arm ( 5 ) provided around a third pivot axis ( 8th ) is articulated on the second arm and the first pivot axis ( 6 ) perpendicular to the second pivot axis ( 7 ) is aligned. Vehicle crane according to claim 1, characterized in that the vehicle crane ( 2 ) can occupy at least two working positions, wherein in the first working position of the first and the second boom ( 3 . 4 ) are arranged side by side in parallel, while the second arm ( 4 ) in the second employment position, an extension of the first 3 ). Vehicle crane according to claim 2, characterized in that the first and the second boom ( 3 . 4 ) can be locked in the two working positions. Vehicle crane according to one or more of the preceding claims, characterized in that a first lifting cylinder ( 12 ) for pivoting the first boom ( 3 ) about the first pivot axis ( 6 ) and a second lifting cylinder ( 13 ) for panning the third jib ( 5 ) about the third pivot axis ( 8th ) are provided. Vehicle crane according to one or more of the preceding claims, characterized in that it can assume a loading crane position and a rear crane position, wherein the first and second boom ( 3 . 4 ) unfolded in the loading crane position and are folded to each other in the back crane position. Vehicle crane according to claim 5, characterized in that the first and the second boom ( 3 . 4 ) are locked in position in the loading crane and the back crane position in their position. Vehicle crane according to one or more of the preceding claims, characterized in that the two arms ( 3 . 4 ) on one side of the crane column ( 2 ) while the third boom ( 5 ) from the crane column ( 2 ) extends substantially to the opposite side. Vehicle crane according to one or more of the preceding claims, characterized in that the first and the second boom ( 3 . 4 ) are arranged in parallel juxtaposition in the mutually folded position, while the third boom ( 5 ) is aligned so that it is pivotable in a plane formed by the second and third boom. Vehicle crane according to one or more of the preceding claims, characterized in that the first and the second boom ( 3 . 4 ) are foldable 180 ° to each other. Vehicle crane according to one or more of the preceding claims, characterized in that the third boom ( 5 ) is designed as a telescopic arm. Vehicle crane according to one or more of the preceding Claims, characterized in that its pivoting range at least 360 °, preferably at least 400 °.