In a car body, a lower travelling body of a crawler crane includes a pair of left and right crawler frames, the car body connecting the crawler frames and supporting an upper slewing body, and a pair of car body weights are disposed on front and rear sides of the car body. The car body supporting device includes a supporting mechanism for movably supporting at least one of the paired car body weights, and a drive section for moving the car body weight supported by the supporting mechanism to thereby shift a center of gravity of the lower travelling body in a front and rear direction. The car body weight supporting device can improve postural stability.

In a car body, a lower travelling body of a crawler crane includes a pair of left and right crawler frames, the car body connecting the crawler frames and supporting an upper slewing body, and a pair of car body weights are disposed on front and rear sides of the car body. The car body supporting device includes a supporting mechanism for movably supporting at least one of the paired car body weights, and a drive section for moving the car body weight supported by the supporting mechanism to thereby shift a center of gravity of the lower travelling body in a front and rear direction. The car body weight supporting device can improve postural stability.

A boom truck includes a truck chassis and a tag axle assembly connected to the truck chassis. The tag axle assembly includes a frame, a boom assembly connected to the frame, and a boom counter weight assembly rotatably connected to the boom assembly. The boom counter weight assembly is configured to be disposed between a first position to extend a wheel base of the boom truck and a second position to define a counterweight relative to the boom assembly.

An accessory device is mountable to an excavator frame of an excavator base. The excavator base, which includes an undercarriage, the excavator frame and a ring gear arranged between the undercarriage and the excavator frame, is configured to allow for rotation of the excavator frame relative to the undercarriage. The accessory device includes a mounting frame, a mount for holding a mast, and at least two outriggers. The mounting frame includes connection elements configured to connect the accessory device to mating connection elements of the excavator frame. The at least two outriggers are directly connected to the carrier frame and configured to support the carrier frame on the ground.

An accessory device is mountable to an excavator frame of an excavator base. The excavator base, which includes an undercarriage, the excavator frame and a ring gear arranged between the undercarriage and the excavator frame, is configured to allow for rotation of the excavator frame relative to the undercarriage. The accessory device includes a mounting frame, a mount for holding a mast, and at least two outriggers. The mounting frame includes connection elements configured to connect the accessory device to mating connection elements of the excavator frame. The at least two outriggers are directly connected to the carrier frame and configured to support the carrier frame on the ground.

This disclosure relates to an automatic concrete pump comprising a support structure, which is mounted on a vehicle, for a concrete distributing mast and at least two supporting jacks which are pivotably joined to the support structure via an articulated joint, each articulated joint comprising two support plates made from a solid material, each having a bearing bore and protruding in a forked manner at a lateral distance from each other over the edge of a defining wall of the support structure, and having a hinge bolt which traverses the bearing bores. According to this disclosure, the defining wall which faces the hinge bolt is further away from the axis of the hinge bolt in the central area between the bearing plates than in the edge areas thereof which are adjacent to the support plates.

This disclosure relates to an automatic concrete pump comprising a support structure, which is mounted on a vehicle, for a concrete distributing mast and at least two supporting jacks which are pivotably joined to the support structure via an articulated joint, each articulated joint comprising two support plates made from a solid material, each having a bearing bore and protruding in a forked manner at a lateral distance from each other over the edge of a defining wall of the support structure, and having a hinge bolt which traverses the bearing bores. According to this disclosure, the defining wall which faces the hinge bolt is further away from the axis of the hinge bolt in the central area between the bearing plates than in the edge areas thereof which are adjacent to the support plates.

An outrigger foot is configured to be disposed on an outrigger of a utility vehicle for detecting secure emplacement of the outrigger. The outrigger foot comprises a housing, a kingpin assembly, and a pad assembly. The housing is configured to be secured to the outrigger. The kingpin assembly is at least partially disposed within the housing. The kingpin assembly is adapted to be in a compressed position while the outrigger foot is securely in contact with the ground, and to be in an uncompressed position while the outrigger foot is free of secure contact with the ground. A proximity sensor is associated with the housing, such that the proximity sensor can detect a proximity of a portion of the kingpin assembly that is in the compressed position. The pad assembly is secured to the kingpin assembly for contacting the ground at various angles.

The invention relates to a method for detecting and verifying a working position of a mobile concrete pump, said method comprising the steps: a) setting up and at least partially supporting the concrete pump at a set-up position; b) detecting position-related data of a working position, wherein the working position is located in a region of a surface to be concreted which is remote from the set-up position; c) comparing the position-related data with a theoretical working area resulting from the set support; and d) outputting a signal as to whether the working position can be operated. This makes it possible to set up or support a mobile concrete pump in the most optimal manner possible. The invention also relates to a method for determining a suitable support setting, a measurement device, and a mobile concrete pump.

A stabilising system for a self-propelled operating machine including two scissor stabilisers that stabilise the machine. Each stabiliser includes a pair of rotatable telescopic stabilising arms; each having a first segment, rotatable between a raised position and an operating position, and a second segment, slidable relative to the first segment between an extended position; first movement means and second movement means. The system includes a processing unit configured to control the first and second movement by rotating the first segments from the operating position to an intermediate position; sliding of the second segment of a first arm to the closed position; rotating the first segment of a second arm from the intermediate position to the raised position; sliding of the second segment of the second arm to the closed position; rotating the first segment of the first arm from the intermediate position to the final position.