5results about How to "Stable damping force" patented technology

The application discloses an overload protection viscous damper with a monitoring function and relates to the technical field of dampers, which comprises a damper body, a piston rod arranged in the damper body, bushings symmetrically arranged on the inner side of the damper body, a storage cavity and a working cavity separated by the bushings, an overflow port, an overflow valve arranged in the overflow port, a first pressure gauge fixedly installed in the storage cavity, a second pressure gauge fixedly installed in the storage cavity and a third pressure gauge fixedly installed in the working cavity. The damper is kept stable by opening and closing of the overflow valve, and even if the temperature influences the medium flow, the medium cannot flow into the storage cavity through the overflow valve due to the arrangement of the adjusting assembly. In addition, the medium flow rate is gentle due to the arrangement of the porous cylinder, so that the damping force fluctuation is avoided.

The invention relates to the technical field of steel wire tension control, in particular to a constant tension control device for releasing a steel wire, which comprises a wire coil and an oil cylinder coaxially positioned in the wire coil and relatively fixed, fluid is stored in the oil cylinder, a plurality of damping bodies are arranged in the oil cylinder along the axis direction of the oil cylinder, and the damping bodies are connected with the wire coil. The damping body is used for limiting the rotating speed of the wire coil; the flow limiting channel is used for limiting the flow of fluid, so that the movement speed of the rotating shaft and the fan plate is limited, damping force is provided for the wire coil, the speed of releasing a steel wire by the wire coil and the tension of the steel wire are conveniently controlled, the abrasion phenomenon of a friction plate in a traditional mode can be avoided, and stable damping force is conveniently provided for the wire coil; meanwhile, when the steel wire releasing speed is increased, the fluid flow speed is increased, and the reverse limitation of the flow limiting channel on the fluid is enhanced, so that the damping effect on the wire coil is enhanced, and the steel wire releasing speed of the wire coil is always kept within a specified range.

This invention discloses a sleeve assembly and a steering column for use in a steering column, comprising a sleeve, a cover, an energy-absorbing element, and a connecting element; one side of the sleeve is provided with a mounting portion having a mounting cavity, and the energy-absorbing element is disposed in the mounting cavity; the energy-absorbing element includes a top plate, and the connecting element is provided with a protrusion, the protrusion having a protrusion bevel; the protrusion passes through a cover through hole on the cover and extends into the mounting cavity; in the initial state, the rear end of the top plate is located between the upper and lower ends of the protrusion bevel, and there is a preset gap between the protrusion bevel and the rear end of the top plate. The sleeve assembly and steering column disclosed in this invention allow the damping force generated by the top plate of the energy-absorbing element to remain stable during deformation and collapse, thereby providing stable damping force to achieve a stable energy absorption effect.

The invention relates to the technical field of Bluetooth sound boxes, in particular to a Bluetooth sound box with an NFC quick pairing function, which comprises a sound box main body, a suction cup is arranged at the bottom of the sound box main body, a compensation device is arranged on the sound box main body, the compensation device is communicated with the interior of the suction cup, and the compensation device is used for extracting air in the suction cup; a control device is arranged on the sound box main body, the control device controls the start and stop of the compensation device according to the storage amount of air in the suction cup, the compensation device comprises a mounting seat fixedly mounted at the bottom of the sound box main body, and the suction cup is fixedly mounted at the bottom end of the mounting seat; a mounting cavity is formed in the mounting seat, a communicating hole is formed in the outer side wall surface of the mounting seat, and the communicating hole is communicated with the mounting cavity. The placement stability of the Bluetooth sound box on the placement plane is improved, and the problem that an existing Bluetooth sound box is low in anti-skid performance and reliability is solved.

This application provides a solenoid valve, including a sleeve, a stationary iron core, an armature assembly, and an excitation assembly. The sleeve defines a receiving cavity, and the sleeve has a first vent and a second vent connected to the receiving cavity. The stationary iron core is fixed to the sleeve. The armature assembly is movably disposed in the receiving cavity along the axial direction of the sleeve. The armature assembly includes an armature and a plug. The armature is arranged along the axial direction of the sleeve, and the plug includes a plug head and an outwardly protruding damping portion. The excitation assembly generates a force that causes the armature and the plug to move away from the first vent, so that the plug head disengages from the first vent. The sleeve has a damping sleeve extending along its axial direction, and the outwardly protruding damping portion protrudes from the surface of the armature and abuts against the inner wall of the damping sleeve. The armature assembly generates a damping force that hinders its movement during movement. The solenoid valve of this application can slow down the movement speed of the armature assembly, reduce noise and vibration, and improve the stability of the solenoid valve.