Mortise and tenon structure frame hydraulic machine

Abstract

A mortise and tenon structure frame hydraulic machine comprises supporting columns, an upper cross beam, a main working oil cylinder, a sliding beam and a lower cross beam, the upper cross beam and the lower cross beam are provided with more than or equal to four upper beam main rib plates, and lower beam plates are inserted into supporting column main plate shoulders on the two sides. The upper cross beams and the lower cross beams are fixed with main plate shoulders of the supporting columns through bolt fastening assemblies through upper beam lap joint plates and lower beam lap joint plates respectively, and the upper cross beams and fastening bolts of the lower cross beams and the supporting columns are horizontally arranged in an upper row and a lower row respectively; the invention has the following advantages: the shear stress at the joint of the upper beam and the lower beam and the pillar acts on the upper beam main rib plate and the lower beam main rib plate which are mutually lapped, the shear stress is not borne by a welding seam, and the connection of the upper beam and the lower beam and the pillar is uniformly stressed by adopting two rows of horizontally arranged screws, so that the product is more stable and reliable in the working process; and the service life is prolonged.

Description

technical field [0001] The invention relates to a fuselage structure of a hydraulic machine, in particular to a hydraulic machine with a mortise and tenon structure frame. Background technique [0002] Patent CN101670672A discloses a frame-type hydraulic machine body structure without tie rods. The device welds shoulders on both sides of the upper beam and the side plates on both sides of the lower beam (see part 2-1 in the attached drawing of the specification). It is assembled with the shoulder welded on the side plate of the column and fastened by bolts to form a combined frame hydraulic machine body structure without tie rods (see 4-1 part in the attached drawing of the manual), and the shoulder at the above assembly place bears tensile stress and shear stress, and the fastening position of the device is located at the shoulder joint. When the oil cylinder of the hydraulic machine moves up and down, the tensile stress and shear stress are all borne by the weld seam welde...

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Problems solved by technology

[0002] Patent CN101670672A discloses a combination frame type hydraulic machine fuselage structure without tie rods. The shoulder (see part 2-1 in the accompanying drawing of its instruction manual) is assembled with the shoulder welded on the side plate of the column and fastened by bolts to form a combined frame hydraulic machine body structure without tie rods (see the accompanying drawing of its instruction manual 4-1 parts), the shoulders of the above-mentioned assembling place are subjected to tensile stress and shear stress, and the fastening position of the device is located at the matching place of the shoulder. The cyclic tensile stress and shear stress of the above products during long-term use will damage the shoulder welds of the upper and lower beams and columns, thereby reducing their stiffness and affecting their service life; at the same time A number of bolts at the joint of the shoulder are arranged vertically to the shoulder. When the beam and column are deformed by force, only the two bolts at the upper and lower outer ends of the vertically arranged bolts bear the greatest force, and the closer to the middle, the smaller the force. The deformation will cause the bolts at the upper and lower ends to fail, and the adjacent bolts can play their maximum role. Long-term use will cause some bolts to gradually fail, so the arrangement of the bolts is unreasonable.

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