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

The invention discloses a variable-volume additional air chamber of a constant internal pressure air spring in a vehicle air suspension system. An inner cavity of a cylinder body is uniformly divided into eight layers of cavities by separation plates in the axial direction of the cylinder body, a lug boss extends from the side wall of the cylinder body, a plunger piston which is not communicated with the cavity of the cylinder body is arranged in the lug boss, the bottom of the plunger piston is provided with a sealing cover which seals the bottom of the lug boss, and the sealing cover is connected with a main air chamber of the air spring through a pipeline; the plunger piston axially penetrates to the outside of the top of the lug boss in the axial direction of the lug boss and is connected with a stepping motor at the top, and an angle sensor is arranged on the top end surface of the plunger piston; the side surface of the plunger piston is circumferentially and uniformly distributed with eight semicircular grooves which correspond to the eight layers of cavities in length, small identical holes with eight centers on the same straight line are arranged on the side surface of the cylinder body, and the eight small holes are respectively communicated with the corresponding eight semicircular grooves and the eight layers of cavities; the angle sensor is connected with a controller after being electrically connected with a modulate circuit; and the controller is electrically connected with the stepping motor. The automatic fast change of the volume of the additional air chamber is achieved, thus the air spring obtains a wider rigidity variation range.

The invention discloses a constant internal pressure air spring additional air chamber which is used for air suspension systems of vehicles and of which the volume is changed continuously and an operating method. In the air chamber, two partition plates for dividing the air chamber into three cavities A, B and C in the radial direction of a cylinder body; a dual-secondary linear motor is fixedly connected to the axial directions of the two partition plates; the two secondary coils of the linear motors are connected with the two partition plates respectively; two solenoid valves are arranged at positions where the two partition plates are provided with small holes; the two solenoid valves and the secondary coils of the two linear motors are connected with an amplifying circuit; the amplifying circuit is connected with a sensor by a singlechip; the volume of the three cavities is changed by controlling the two partition plates to move right and left to increase or reduce the stiffness of a spring system, and thus, the volume of the air spring additional air chamber is changed quickly and continuously, so that an air spring has the large stiffness range, the volume of the additional air chamber is changeable but internal pressure keeps constant, and the driving stability and riding comfort of the vehicles are improved.

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 composite load simulator for achieving multidimensional pure bending moment and tensile pressure. The composite load simulator can achieve pure bending moment loading, tensile pressure loading and pure bending moment and tensile pressure composite loading in any direction. The simulator comprises a moving platform, a fixed base and moving branch chains. The moving platform is fixedly connected with a loaded test piece, and the moving branch chains comprise the central moving branch chain and the uniformly-distributed moving branch chains, wherein the uniformly-distributed moving branch chains are of six different structures. The uniformly-distributed moving branch chains of the different structures, the central moving branch chain, the fixed base and the moving platform can form six kinds of different bending moment-tensile pressure composite load simulator structures. The composite load simulator has the advantages that the composite load simulator can achieve multidimensional pure bending moment load output and can output composite loads of the bending moment and the tensile pressure; due to the fact that the branch chains exist, the structure has high bearing rigidity, decoupling can be achieved through output of the tensile pressure and the bending moment, and the composite load simulator is convenient to control, simple to manufacture and convenient to install.

The invention relates to a vibration isolation and buffer device for machine-born equipment, in particular to a totally-closed rigidity adjustable type vibration isolator, which comprises a casing, an installation core shaft, a protective rubber cover, an upper rubber ring, a spherical vibration isolation part and a lower rubber ring. The casing is of a sealed structure, the top of the casing is provided with an installation hole where the installation core shaft is arranged, and the spherical vibration isolation part is arranged in the sealed casing and is connected with the bottom of the installation core shaft together. The upper rubber ring is sleeved at the upper portion of a damp rubber ball, and the lower rubber ring is sleeved at the lower portion of the damp rubber ball which is sealed in the casing. The totally-closed rigidity adjustable type vibration isolator adopts a totally-closed structure to have small environment influence, utilizes a combination structure combining the spherical surface and the cylindrical surface to improve vibration isolation and retarding effects, utilizes the structures of the upper rubber ring and the lower rubber ring to limit the swinging of the head of the installation core shaft and improve using safety, and can be suitable for different frequency ranges by rotating the upper cover to adjust the rigidity of the vibration isolator.

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.

The invention discloses an air spring auxiliary chamber of a vehicle air suspension, which has a variable volume. N separators are arranged in a cylindrical cylinder body to uniformly divide a cylinder body inner cavity into n small chambers along the axial direction; a center shaft extends into the cylinder body from the outside of one end of the cylinder body and is inserted in center holes of the n separators; the first separator is tightly attached to the other end face of the cylinder body; the same position on each separator is provided with a sector through hole which is coaxial with the center holes; the middle of each separator is provided with a cylindrical hollow slot which is coaxial with the center holes; a sector valve plate is arranged in each cylindrical hollow slot; all the sector valve plates are axially in rigid connection with the center shaft in a spiral manner along the center shaft; one end of the center shaft positioned outside the cylinder body is connected with a stepping motor and an angle sensor is arranged on the end face of the one end of the center shaft; and when the center shaft rotates by a certain angle every time, different sector valve plates are driven to seal the corresponding sector through holes, so that automatic and rapid change of the volume of the auxiliary chamber is implemented and an air spring obtains a large rigid variation range.

The invention discloses a volume variable air spring auxiliary chamber experiment device and a volume variable air spring auxiliary chamber experiment method. Inner cavities of a cylindrical shell of an auxiliary chamber are eight sector cylinder chambers with same volume, which are separated by sector plates circumferentially; a clapboard is enclosed on the upper end face of the eight sector cylinder chambers, and is provided with eight small holes opposite to the eight sector cylinder chambers; a movable cover plate is arranged on the upper layer of the cylindrical shell, and is provided with a height sensor; the lower end face of the movable cover plate is vertically fixedly connected with eight plunger pistons respectively in sealed fit with the eight small holes, and the lengths of the eight plunger pistons form an arithmetic progression in turn; an air spring system is connected with a computer through a numerical control electrohydraulic servo vibration testing system; and withthe increase of the heights of the eight plunger pistons, the eight sector cylinder chambers are opened in turn, the influence of different volumes of the auxiliary chamber on the characteristics of the air spring is measured, the air spring can obtain a wider rigidity change range, and the running stability and riding comfortability of a sedan are improved.