7results about How to "Improve dynamic stiffness" patented technology

The utility model discloses an automobile auxiliary frame installation hole reinforcing structure which is installed in an automobile body longitudinal beam and comprises a first reinforcing piece and a second reinforcing piece, turnups are arranged on the multiple edges of the first reinforcing piece and welded to the interior of the automobile body longitudinal beam, an installation hole is formed in the upper surface of the first reinforcing piece, and the installation hole is formed in the lower surface of the second reinforcing piece. The second reinforcer is arranged at the bottom of the first reinforcer, a plurality of edges of the second reinforcer form turned-over edges, and the turned-over edges are welded to the vehicle body longitudinal beam and the first reinforcer. Effective support is provided at the mounting hole of the auxiliary frame through the first reinforcing piece, the second reinforcing piece and the flanging, the dynamic stiffness of the mounting hole of the auxiliary frame can be effectively improved, vibration transmitted to a vehicle body through the mounting hole of the auxiliary frame is reduced, the problem that comfort is reduced due to noise vibration of the vehicle is solved, and the service life of the vehicle is prolonged. And the use experience is effectively improved.

The application discloses a kind of multi-in-one integrated electric drive, noise reduction design method and electric forklift in the field of electric forklift integrated electric drive.The multi-in-one integrated electric drive includes two-in-one high-speed reducer, the two-in-one high-speed reducer includes reducer shell, walking gear train and hydraulic gear train, first chamber and second chamber are formed in reducer shell independently, by walking gear train and hydraulic gear train are respectively arranged in first chamber and second chamber, can effectively avoid the loss of two simultaneous work stirring oil turbulence.Through setting stator installation stopper, rotor installation bearing chamber and bolt hole in the side of reducer shell, walking motor and hydraulic motor are simultaneously integrated and installed on reducer shell, the front end cover of motor in traditional forklift multi-in-one assembly is saved, effectively save forklift installation space.The noise reduction design method proposed in the application can significantly improve the NVH performance of integrated electric drive.

The utility model relates to the technical field of unmanned plane, concretely provides unmanned plane vibration suppression method and structure based on local area resonance metamaterial, including main body arch frame and shallow arch curved beam, the curved inside of shallow arch curved beam with the curved inside of main body arch frame opposite setting, the both ends of shallow arch curved beam with the curved inside of main body arch frame fixed connection and form the quasi zero stiffness single oscillator with integrated structure, the end face of main body arch frame both ends is in the same plane, the position of end face of main body arch frame both ends close to the center still is provided with screw hole, through setting up curved beam combination oscillator with shallow arch curved beam, solved the problem that unmanned plane traditional oscillator is difficult to realize low inherent frequency vibration isolation and poor spatial adaptability.

This invention provides an ACU mounting bracket, a floor structure, and an automobile. The ACU mounting bracket includes a saddle-shaped bracket body with multiple ACU mounting points. It has an arched structure in the longitudinal direction, with the ACU mounting points located at the highest points of the arch. The front of the bracket body has a flanged surface for connection to the vehicle's floor structure. The floor structure includes a front floor, a left reinforcing beam for the central channel located on the left side of the front floor, a right reinforcing beam for the central channel located on the right side of the front floor, and an ACU mounting bracket spanning between the left and right reinforcing beams. This invention significantly improves the dynamic stiffness of the ACU mounting points through a three-cavity structure design, enhances the overall strength of the bracket through a double-arch structure and multiple reinforcing ribs, and improves structural stability by creating a full-cycle connection between the bracket and the vehicle body through the flanged surface design.

The application discloses a leaf spring bearing point vehicle body reinforcing structure, which comprises a rear longitudinal beam body, a leaf spring hanging front support arranged on the rear longitudinal beam body and a reinforcing pipe beam arranged on the leaf spring hanging front support; the reinforcing pipe beam is transversely arranged and penetrates through the mounting holes of the left and right leaf spring hanging front supports, and the two ends of the reinforcing pipe beam are respectively welded and fixedly connected with the left and right leaf spring hanging front supports, and the reinforcing pipe beam is located below the rear longitudinal beam body. The leaf spring bearing point vehicle body reinforcing structure of the application can improve the overall performance by optimizing the design of the vehicle body reinforcing structure, improve the overall dynamic stiffness of the vehicle body, strengthen the fatigue resistance and dynamic stability of the mounting point area, and meet the high performance requirements of commercial vehicles on the leaf spring system mounting point. The application further discloses a vehicle and a manufacturing method of the leaf spring bearing point vehicle body reinforcing structure.

This application relates to the field of vehicle chassis technology and provides an exhaust hanger and a vehicle equipped with it. The exhaust hanger of this application includes a hanger bracket and a rubber body fixed to the hanger bracket. The hanger bracket has a first connecting portion and a deformable portion. The first connecting portion is used to connect to the vehicle body, and the deformable portion is formed by a part of the hanger bracket. The rubber body has a second connecting portion for connecting to the exhaust system. The deformable portion is located above the rubber body and is adapted to elastically deform when the rubber body is subjected to an impact load greater than a set threshold. The exhaust hanger of this application enables the exhaust hanger stiffness to adaptively increase with the load frequency, while also avoiding damage to the rubber body structure caused by high-intensity loads, thereby improving its performance.

The application relates to the technical field of ultra-precision machining equipment, in particular to a gas bearing assembly and a gas-floating motorized spindle with the same, which comprises an outer shell and a radial gas bearing arranged in the outer shell, a ring-shaped air inlet groove is arranged on the inner wall of the outer shell and corresponds to the position of the radial gas bearing, a closed air inlet cavity is formed between the ring-shaped air inlet groove and the outer cylindrical surface of the radial gas bearing, a plurality of air inlet holes which are in communication with the air inlet cavity are circumferentially distributed on the outer cylindrical surface of the radial gas bearing, a throttling hole which is in communication with the air inlet hole is arranged on the inner cylindrical surface of the radial gas bearing, and a composite pressure equalizing structure which is in communication with the throttling hole; the composite pressure equalizing structure comprises at least one circumferential pressure equalizing groove and at least one axial pressure equalizing groove, and the circumferential pressure equalizing groove is a discontinuous structure which is discontinuous along the circumferential direction. The radial gas bearing is designed as a two-section type and an intermediate air outlet structure, the composite pressure equalizing groove which is combined with the circumferential discontinuous structure and the axial communication structure optimizes the pressure field distribution, suppresses the radial runout of the spindle rotor, and thus the supporting stiffness and the machining precision are improved.