Abstract: The present disclosure provides a boom, a boom assembly and a work machine. The work machine comprises a boom support structure and the boom assembly connected to the boom support structure, wherein the boom assembly comprises a plurality of first booms hinged to one another, at least one of the first boom is the boom, the boom has a box-type structure and comprises a body comprising a first body portion and a second body portion, the first body portion and the second body portion overlapping each other to enclose and form the box-type structure. The boom can be designed to have a light weight, and a split-type design facilitates simplifying a mold, improving the versatility of a mold, alleviating the inconsistent of thermal deformation of the boom, and facilitating later maintenance.

Abstract: The present disclosure provides a boom comprising a frame structure, wherein the boom comprises: a top plate; a bottom plate, wherein the bottom plate and the top plate are oppositely disposed at an interval; a first side plate; and a second side plate, wherein the second side plate and the first side plate are oppositely disposed at an interval, wherein a first side of the top plate is provided with a first bending portion, and at least a portion of the first bending portion and a first end of the first side plate are attached and spliced to each other, a second side of the top plate opposite to the first bending portion is provided with a second bending portion, at least a portion of the second bending portion and a first end of the second side plate are attached and spliced to each other, and a first side of the bottom plate is provided with a third bending portion, at least a portion of the third bending portion and a second end of the first side plate are attached and spliced to each other, a second side

Abstract: A working device and an arm support (100) thereof. The arm support (100) comprises a top plate (110), a bottom plate (120), and first and second side plates (130, 140). The top plate (110) and the bottom plate (120) are oppositely disposed at an interval. The first and second side plates (130, 140) are oppositely disposed at an interval. One side and an opposite side of the first side plate (130) are provided with a first and a second bending portion (134, 136), respectively. At least a part of the first and second bending portions (134, 136) are attached and spliced to the top plate (110) and the bottom plate (120), respectively. One side and an opposite side of the second side plate (140) are provided with a third and a fourth bending portion (144, 146), respectively. At least a part of the third and fourth bending portions (144, 146) are attached and spliced to the top plate (110) and the bottom plate (120), respectively.

Abstract: An engineering machinery includes a cab, a vehicle body located behind the cab, a rotating platform provided on the vehicle body, and multiple-sectional booms articulated in sequence, wherein a centerline of gyration of the rotating platform is located in a middle of the vehicle body, a first sectional boom is articulated with the rotating platform, and the first sectional boom extends from the rotating platform toward a rear end of the vehicle body, a second sectional boom is articulated with the first sectional boom and folded above the first sectional boom, the first sectional boom to a fourth sectional boom are folded into an R shape, a projection of a third sectional boom at least partially overlaps a projection of the cab on a vertical projection plane perpendicular to a length direction of the vehicle body.

Abstract: The present disclosure provides a boom, a boom assembly and a work machine. The work machine comprises a boom support structure and the boom assembly connected to the boom support structure, wherein the boom assembly comprises a plurality of first booms hinged to one another, at least one of the first boom is the boom, the boom has a box-type structure and comprises a body comprising a first body portion and a second body portion, the first body portion and the second body portion overlapping each other to enclose and form the box-type structure. The boom can be designed to have a light weight, and a split-type design facilitates simplifying a mold, improving the versatility of a mold, alleviating the inconsistent of thermal deformation of the boom, and facilitating later maintenance.

Abstract: In one aspect of the invention, a boom apparatus used for a concrete pump vehicle includes multiple booms, where the multiple booms comprise a first boom hinge-connected to a turntable of the concrete pump vehicle and a second boom hinge-connected to the first boom. When the boom apparatus is in a folded state, the first boom extends towards a cab of the concrete pump vehicle, and the second boom is further placed above the first boom. The invention also provides a concrete pump vehicle having the boom apparatus.

Abstract: In one aspect of the invention, a boom apparatus includes at least a first boom, a second boom and a third boom sequentially connected to one another, wherein a root end of the first boom is connected to a turntable, some of the booms is a bent boom occupying at least two column spaces, and when the booms are in a folded state, the boom apparatus occupies at least three column spaces. The invention also provides a concrete pump vehicle having the boom apparatus.

Abstract: In one aspect of the invention, a boom apparatus used for a concrete pump vehicle includes multiple booms, where the multiple booms comprise a first boom hinge-connected to a turntable of the concrete pump vehicle and a second boom hinge-connected to the first boom. When the boom apparatus is in a folded state, the first boom extends towards a cab of the concrete pump vehicle, and the second boom is further placed above the first boom. The invention also provides a concrete pump vehicle having the boom apparatus.

Abstract: A support device for use in a walking machine including a frame-like base connected to a chassis, sheath tubes fixed on the frame-like base, extensible arms provided in the sheath tubes, support parts provided on outward ends of the extensible arms and extensible perpendicularly, wherein, the sheath tubes are arranged in double X-form, one pair of sheathe tubes arranged diagonally are parallel and at same height, another pair of the sheath tubes that are arranged diagonally and are also parallel and at a same height are at a different height from the pair of the sheath tubes.

Abstract: A support device for use in a walking machine including a frame-like base connected to a chassis, sheath tubes fixed on the frame-like base, extensible arms provided in the sheath tubes, support parts provided on outward ends of the extensible arms and extensible perpendicularly, wherein, the sheath tubes are arranged in double X-form, one pair of sheathe tubes arranged diagonally are parallel and at same height, another pair of the sheath tubes that are arranged diagonally and are also parallel and at a same height are at a different height from the pair of the sheath tubes.