39results about How to "Wide range of stiffness" patented technology

The invention provides a bearing pre-tightening device. The bearing pre-tightening device comprises a bearing seat, two bearings and a shaft sleeve; the bearings are installed inside the bearing seatand are installed on a shaft through the shaft sleeve; the bearings are axially positioned; the bearing seat is provided with a pressing device; the pressing device is used for pressing an outer ringof each bearing; an elastic element is arranged between the two bearings; the elastic element is deformed after being stressed so as to press the outer ring of each bearing, and thus each bearing isapplied with pre-tightening force. The bearing pre-tightening device provided by the invention comprises an integrated elastic element which is simple in structure and convenient to install; moreoverthe elastic element has the characteristic of wide rigidity range; and the bearing pre-tightening device can be used for applying various different pre-tightening force by designing various differentrigidity.

The invention discloses a dynamic pressure gas thrust bearing with multiple layers of bubbling foils. The dynamic pressure gas thrust bearing comprises a bearing seat and a shaft, wherein the shaft with a rotor thrust plate is arranged in the bearing seat, a plurality of groups of elastic components with the same structure are arranged between the bearing seat and the rotor thrust plate, and the elastic components are uniformly arranged along the circumferential direction of the bearing seat; each elastic component comprises the multiple layers of bubbling foils and a flat foil, the multiple layers of bubbling foils are arranged above the bearing seat, and the flat foil is arranged between a top bubbling foil and the rotor thrust plate and fits with an elastic bubbling foil; bubbling bulges are formed on each bubbling foil; and one end of the elastic component is fixed on the bearing seat by a locating component, and the other end of the elastic component is free. By virtue of the elastic components which are arranged in sections and composed of the flat foils and the bubbling foils, the rigidity distribution and the assembly character of the bearing are improved, and unstable whirling motion of a rotor is effectively restrained. According to the bearing with the multiple layers of bubbling foils, multiple adaptability rigidities are generated by multiple layers of supporting, the rigidity variation range of the bearing is extended, and the rigidity character of the foil bearing is improved.

The invention discloses a continuous variable rigidity flexible robot. The continuous variable rigidity flexible robot comprises a variable rigidity device, an installing fixing device and a control device. The variable rigidity device comprises a first corrugated pipe, a second corrugated pipe, a first magnet, a second magnet, a third magnet, a fourth magnet and dull polish iron balls. The firstmagnet and the second magnet are fixed into hard pipes at the two ends of the first corrugated pipe correspondingly. A soft corrugated pipe at the middle portion of the first corrugated pipe is filledwith the multiple dull polish iron balls. The second corrugated pipe is fixed to the top of the first corrugated pipe. The third magnet and the fourth magnet are fixed into hard pipes at the two endsof the second corrugated pipe correspondingly. A soft corrugated pipe at the middle portion of the second corrugated pipe is also filled with the multiple dull polish iron balls. The interaction force between the dull polish iron balls is changed by controlling the intensity of a magnetic field, accordingly, the integral rigidity is changed, and the purpose of variable rigidity is achieved. A main shape of the robot cannot change. The advantages that the principle is simple, rigidity can be subjected to stepless regulation and control, the rigidity changing range is wide, the bearing force islarge, and the bending performance is good are achieved.