4results about How to "Improve dynamics" patented technology

The utility model relates to a kind of low additional bending moment welding film disc coupling structure, including axle, and axle both sides are connected by flexible film disc group installation disc;Flexible film disc group includes flexible film disc and adapter disc, adapter disc is connected with axle by transmission bolt and self-locking nut, and adapter disc is connected with installation disc by flexible film disc;Flexible film disc is connected installation disc and adapter disc by vacuum electron beam welding process, and flexible film disc inner circumferential end portion is equipped with flexible inner welding surface.The utility model is connected by welding instead of bolt, effectively reduce the weight of coupling;While by flexible film disc close to installation disc, so that gravity position is close to installation disc end face, additional bending moment to shaft head can be effectively reduced, improve dynamic characteristics, adapt to high speed application.

The present invention discloses an optimized Fc variant and its application, wherein the Fc region variant comprises amino acid mutations at multiple sites compared with the parent Fc, the positions of the mutations are 239th, 330th, 252nd, 254th and 256th, and the amino acid sequence of the Fc region variant is shown in SEQ ID NO: 1. Compared with the parent Fc, the Fc region variant provided by the present invention has enhanced binding to human FcRn and human FcγRⅢa, has stronger ADCC activity and longer in vivo half-life, and has better thermal stability.

The invention provides a tooth trace pure rolling gear rack mechanism based on an elliptic tooth profile combination function, and relates to the technical field of gear transmission, the tooth trace pure rolling gear rack mechanism comprises a gear and a rack, the end face tooth profile of the gear and the rack is composed of an end face working tooth profile curve and a tooth root transition curve, and the end face working tooth profile curve of the gear and the tooth root transition curve is an elliptic function. The tooth surfaces of the gear and the rack have arc tangent function and elliptic function combined tooth line structures, and control points are set for smooth connection; at least one pair of gear tooth meshing points of the gear and the rack are located at nodes to achieve pure rolling meshing contact, and meshing lines formed by moving tracks of the meshing points of the gear and the rack respectively form two combined function contact lines on the tooth surfaces of the gear and the rack. The method has the beneficial effects that two functions are smoothly connected at a specific control point by setting the specific control point to form a combined tooth line, so that the axial force is eliminated, and the service life of the bearing is favorably prolonged.

The present invention provides a pure rolling gear rack mechanism based on a parabolic function tooth profile hyperbolic tooth line, which relates to the field of gear transmission technology, including a gear and a rack, wherein the end face tooth profile of the gear and the rack is composed of an end face working tooth profile curve and a tooth root transition curve, and the end face tooth profiles of the gear and the rack are symmetrical on both sides; the end face working tooth profile curve of the gear and the rack is a parabola; the tooth surface of the gear and the rack has a hyperbolic tooth line structure; at least one pair of gear tooth meshing points of the gear and the rack are located at a node to achieve pure rolling meshing contact, and the meshing lines formed by the moving trajectories of the gear and rack meshing points form two contact lines on the tooth surfaces of the gear and the rack, respectively. Beneficial effects of the present invention: the gear and the rack both use symmetrical tooth lines to eliminate the axial force existing when the gear and the rack are meshing, which is beneficial to improving the service life of the bearing.