Portal frame

About: Portal frame is a research topic. Over the lifetime, 1778 publications have been published within this topic receiving 7210 citations.

Circuit board spare part welding detection device

Abstract: The utility model relates to a technical field is made to the TV set -top box, especially relates to a circuit board spare part welding detection device, including workstation, portal frame, cylinder, detection case, contact probe and mounting fixture, the portal frame is fixed on the workstation, the cylinder is fixed on the portal frame, the piston rod of cylinder with the detection case is connected, the below of detection case sets up the contact probe, detection circuitry board passing signal line is in with the setting ampere meter and voltmeter on the portal frame are connected, the mounting fixture lower part is equipped with the sliding sleeve, the sliding sleeve with fix slide rail cooperation on the workstation, mounting fixture's one end is connected with the handle The utility model discloses simple structure shows the current -voltage value that records on ampere meter and voltmeter through the detection circuitry board in the detection case, easily reads, detect fast, greatly reduced workman's intensity of labour, work efficiency improves greatly

Differential mechanism maintenance frame with adjustable

Abstract: The utility model relates to a differential mechanism maintenance frame with adjustable belongs to the technical field of vehicle unit's maintenance. This device is equipped with the slider includingthe portal frame on, connect chain block on the slider, still including setting up the rotary mechanism on the portal frame, rotary mechanism include worm gear mechanism, front axle bearing, rear axlebearing and pass the front axle bearing respectively and the rear axle bearing before the rotatory fork of rotatory fork and back, front axle bearing and rear axle bearing set up on the pillar of portal frame relatively. This device is through using rotatory rectangular shape hole of sticking, and differential mechanism's mounted position can change, can keep in repair not unidimensional differential mechanism, adopt the worm gear pivoting mode, the drive ratio is great, and is very light during adjustment differential mechanism angle, low in labor strength, set up chain block, can make things convenient for the operating personnel installation, dismantle differential mechanism, needed 2 people coordinating operation originally at least, the existing maintenance that only needs 1 people can accomplish heavy goods vehicle differential mechanism, labour saving and time saving.

Overall Reliability Assessment of Portal Frame Structure with Roof Beam Outward Offset

Abstract: This article deals with the condition that the roof beams of portal frame are outward offset beyond the standard limit, determines the most unfavorable position of the portal frame structure under the load and establishes the criterion standard of structural failure based on the space overall finite element analysis. It adopts Monte-Carlo method in reliability analysis methods to realize the overall reliability analysis of the portal frame structure with the roof beam outward offset. Analysis shows that the actual structure is at safe state under the design load and the reliability conforms to the standard requirement.

Portal frame structure for automatic deficiency detection of bent tubes

Abstract: The invention discloses a portal frame structure for automatic deficiency detection of bent tubes, and relates to the technical field of automatic deficiency detection of hot-bending tubes The portal frame structure comprises cross beams and longitudinal beams The cross beams are connected with the longitudinal beams to form a rectangular frame structure Guide rails are fixedly arranged on the upper surfaces of the longitudinal beams longitudinally First racks are arranged longitudinally along the guide rails By the portal frame structure for automatic deficiency detection of the bent tubes, a stable framework can be provided to leftward and rightward movement of a manipulator on a transverse manipulator operation mechanism, the manipulator can clamp a probe to reach any positions within the range of a portal frame, and the movement is done according to detection routes automatically generated after scanning of the bent tubes, so that the portal frame structure has the advantages of high efficiency, high automation degree and the like; moreover, the portal frame structure itself has the advantages of stable structure and convenience in maintenance