4results about How to "Lower support height" patented technology

The application provides a variable-span support device for a through-type movable formwork and a displacement method thereof, and belongs to the technical field of highway bridge construction. A plurality of main beam support point beams are arranged in the inner cavity of the main beam of the formwork, serving as force bearing support points of the main beam of the formwork and being used for variable-span support; and longitudinal slides are arranged between adjacent main beam support point beams, the longitudinal slides serving as connecting channels between the adjacent main beam support point beams, so that the suspended double-support-point self-balancing support device at the bottom of the main beam support point beam can slide from one main beam support point beam to another main beam support point beam along the longitudinal slide. The component structure of the application is simple, and all the components are installed in the inner part of the main beam of the formwork, effectively reducing the support height of the main beam of the formwork and increasing the stability and construction safety of the formwork; when the support point is converted, the crane is not needed for hoisting and transporting, and only a tow chain is needed to realize the sliding displacement of the support device.

The utility model relates to the technical field of height adjusting of floating roller of harvester, specifically relates to a kind of height adjusting mechanism of floating roller of harvester, overbridge drive structure for harvester and harvester.The height adjusting mechanism of floating roller of harvester includes two mounting plates and two height adjusting structures, and height adjusting structure includes support member and rotating operating member, support member is rotatably installed in mounting plate, support member has first support surface and second support surface for supporting floating roller, the interval of first support surface and the rotating center of support member is greater than the interval of second support surface and the rotating center of support member;Rotating operating member is fixedly installed in support member;Based on the driving of rotating operating member, support member can rotate and support floating roller with first support surface or second support surface.The height adjusting mechanism of floating roller of harvester of the utility model does not need to disassemble relevant parts, so that the height adjusting work of floating roller can be relatively time-saving and labor-saving.

A packaging machine lifting device comprises a bottom frame and a lifting plate located above the bottom frame, the lifting plate vertically ascends and descends along a vertical guide structure of the bottom frame, the front edge and the rear edge of the bottom frame are each rotationally provided with a pair of lower rotating swing arms, and the upper end of each lower rotating swing arm is rotationally connected with an upper rotating swing arm correspondingly. The upper end of each upper rotating swing arm is rotationally connected with the bottom of the lifting plate, a telescopic mechanism is rotationally arranged on one side of the bottom frame, connecting lugs protruding out of lower rotating swing arm bodies are arranged at the upper ends of the pair of lower rotating swing arms close to the telescopic mechanism respectively, and the connecting lugs are rotationally connected with the other end of the telescopic mechanism. And when the telescopic mechanism stretches out and draws back, the rotary connecting part of the lower rotary swing arm and the upper rotary swing arm is driven to swing towards one side. The rotary connecting part is effectively prevented from deforming, so that the service life of the lifting device is guaranteed, in addition, even if the pulling shaft slightly deforms, the pulling shaft can be replaced, and replacement is simple, convenient and rapid.