6results about How to "Effective vibration isolation" patented technology

The utility model discloses a controller frame assembly which comprises a frame body, an upper installation part and a lower installation part, the upper installation part is fixedly connected with the side face of the frame body, the lower installation part is fixedly connected with the corresponding position of a frame, the upper installation part and the lower installation part are oppositely arranged, and the upper side face of the soft cushion is fixedly connected with the lower side face of the top plate. The lower side face of the cushion is fixedly connected with the upper side face of the bottom plate, the upper side face of the top plate is provided with an upper bolt extending upwards, the upper bolt penetrates through the upper installation piece and is pressed through an upper nut, and the lower side face of the bottom plate is provided with a lower bolt extending downwards, and the lower bolt penetrates through the lower installation piece and is pressed through a lower nut. Vibration can be effectively isolated, torsional force is filtered, and the service life of the controller frame assembly is prolonged. Cracking and deformation of the controller frame are avoided, the overall strength is improved, and normal work of the controller is guaranteed. The utility model further discloses an electric heavy truck comprising the controller frame assembly.

The invention discloses a magnetorheological fluid aircraft landing gear buffer strut, comprising an outer cylinder, an inner cylinder, a floating piston, a piston rod, an electromagnetic control assembly, a liner and an oil needle; the inner cylinder is located inside the outer cylinder; the floating piston is installed between the inner cylinder and the outer cylinder; the lower end of the inner cylinder extends into the piston rod; the piston rod extends from the outer cylinder; the electromagnetic control assembly is installed on the closed end of the piston rod; the electromagnetic control assembly generates a magnetic field after being energized; the upper end of the liner is sleeved on the inner cylinder, and the lower end is installed on the electromagnetic control assembly; the oil needle comprises an upper cut-off section and a lower cut-off section connected at both ends of the middle section; the invention can meet various complex working conditions faced by aircraft landing, that is, it can meet the aircraft landing shock requirements, and can also effectively reduce the overall natural frequency, and better isolate the vibration from the ground during the taxiing process.

This invention discloses an additive manufacturing-based inertial amplification nonlinear low-frequency vibration isolation metamaterial structure, vibration isolation device, and its performance control method. The vibration isolation metamaterial structure includes a rhombic frame structure, an inertial amplification unit, and a square spring structure. The square spring structure is arranged within the rhombic frame structure, with its two ends connected to a pair of opposite corners of the rhombic frame structure. The elastic extension direction of the square spring structure is parallel to the diagonal of this pair of opposite corners of the rhombic frame structure. The inertial amplification unit has a centrally symmetrical structure, including a rigid rod, two counterweights, and two diagonal rods. The center of symmetry of the inertial amplification unit, the center of the rhombic frame structure, and the center of the square spring structure all coincide in projection. Therefore, the vibration isolation metamaterial structure of this invention significantly widens the bandgap range and enhances low-frequency vibration isolation performance, exhibiting excellent performance in suppressing longitudinal waves in the 0-1000Hz low-frequency range, increasing vibration damping, and energy absorption.

This invention discloses a geometrically nonlinear, high-load, high-isolation and vibration-damping robot wheel-leg mechanism, including a thigh, a lower leg, a wheel, a crank, a connecting rod, an elastic device, a damping device, a first joint motor, and a second joint motor. The first and second joint motors are located inside a housing. The first joint motor is connected to the upper end of the robot's thigh and drives its rotation. The lower leg is rotatably connected to the lower end of the thigh, and the wheel is connected to the lower end of the lower leg. The upper end of the crank is connected to the second joint motor, and the lower end of the crank is rotatably connected to the upper end of the connecting rod. The lower end of the connecting rod is rotatably connected to the upper end of the lower leg. The damping device and the elastic device connect the lower leg and the connecting rod to achieve vibration isolation and reduction. This invention improves the robot's vibration isolation and reduction performance when traversing bumpy roads or walking on legs, making the robot body more stable and reducing the impact on the motors.

The invention belongs to the technical field of semiconductor scanning electron microscopes, and particularly discloses a motion platform damping system and a scanning electron microscop.The motion platform damping system comprises a vacuum cavity, a buffer module and a motion control unit, and the buffer module is located on the inner side of the vacuum cavity; a motion table, a scanning electron microscope and a measurement system are further arranged in the vacuum cavity, the buffer module is installed on the motion table, the scanning electron microscope and the measurement system are installed on the side wall of the vacuum cavity, a supporting seat is arranged on the side edge of the buffer module, and the supporting seat penetrates through the vacuum cavity and is connected with a foundation. An acceleration sensor and an active shock absorber are installed on the outer side of the vacuum cavity, and the active shock absorber is located between the vacuum cavity and the foundation. The buffer module is used for storing and releasing energy, so that high frequency under impact of driving counterforce of the motion table is converted into low-frequency components, and the buffer module can counteract part of the driving counterforce of the motion table, so that the vibration amplitude is reduced.

The application discloses a magnetic nonlinear stiffness large-damping high-isolation and damping robot wheel-leg mechanism, which comprises a thigh, a shank, a wheel, a crank rod, a connecting rod, a magnetic device one, a magnetic device two, a damping device, a first joint motor and a second joint motor. The first joint motor and the second joint motor are located in a box body, the first joint motor is connected with the upper end of the thigh of the robot and drives the rotation of the thigh, the shank connecting point is rotationally connected with the lower end of the thigh, and the wheel is connected with the lower end of the shank. The upper end of the crank rod of the crank rod is connected with the second joint motor, the lower end of the crank rod is rotationally connected with the upper end of the connecting rod of the connecting rod, and the lower end of the connecting rod is rotationally connected with the upper end of the shank. The damping device, the magnetic device one and the magnetic device two are connected with the shank and the connecting rod respectively, and isolation and damping are realized. When the robot passes through a bumpy road surface or walks in a foot mode, the isolation and damping performance of the robot is improved, the fuselage is more stable, and the impact on the motor is reduced.