Gas spring device driven by linear motor

Abstract

The invention discloses an air spring device driven by a linear motor. The air spring device comprises an air cylinder sleeve with one open end. The air cylinder sleeve is internally provided with a connecting rod which is in clearance fit with the air cylinder sleeve and made of a non-permeability magnetic material. One end of the connecting rod extends out of an opening of the air cylinder sleeve, the connecting rod is internally provided with a center through hole, and a magnetic force unit is sleeved with the center through hole. The magnetic force unit comprises magnets and magnetizers which are alternately arranged. The end, located in the air cylinder sleeve, of the connecting rod is fixedly connected with an arranged piston, the end, extending out of the air cylinder sleeve, of theconnecting rod is provided with a tail cap which is used for compressing the magnetic force unit, and the piston and the air cylinder sleeve are slidably matched. An iron core arranged outside the connecting rod in a sleeving mode is fixedly arranged in the air cylinder sleeve, an armature coil is arranged in the iron core, the iron core is in clearance fit with the connecting rod, and an air gapis formed between the iron core and the connecting rod. The air spring device driven by the linear motor adopts the integrated design idea and has the advantages of being simple and compact in structure, small in size, high in response speed, high in motion precision, small in friction, low in noise and the like.

Description

technical field [0001] The invention belongs to the technical field of springs, in particular to a gas spring device driven by a linear motor. Background technique [0002] Gas spring is an industrial accessory that can perform functions such as support, buffer, brake, height adjustment and angle adjustment. It is widely used in the fields of automobile, aviation, medical equipment, furniture and machinery manufacturing. In some advanced applications of automobiles, engineering machinery, and textile equipment, it is required that the gas spring can automatically expand and contract through electronic control, so as to solve the automatic control problems of different applications. [0003] At present, the common electric drive struts are mainly divided into two categories: one is a structure that adopts a steel coil spring to cooperate with a motor, a reducer, and a lead screw. Mechanism, the main problem is that the supporting force of the steel coil spring is proportion...

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Problems solved by technology

[0005] The electric drive mechanism for the tailgate of the automobile directly installs the stator and mover of the linear motor on the cylinder body of the ordinary gas spring. In order to give full play to the advantages of the strong designability of the structure of the linear motor, the electric drive mechanism for the tailgate of the automobile has equipment At the same time, due to the interference of ordinary gas springs, that is, when the linear motor drives the gas spring piston rod to move, the air pressure in the gas spring piston rod cavity and rodless cavity will change accordingly, resulting in the electric drive mechanism of the tailgate of the car. The operation is not stable; in summary, due to these defects, the application and promotion of the electric drive mechanism for the tailgate of the car is limited, and no specific products have been seen on the market

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