an electric push rod

An electric push rod and push rod technology, which is applied in the direction of electric components, electrical components, electromechanical devices, etc., can solve the problems of high cost and easy damage of push rods, and achieve the effect of good positioning effect, avoiding loss and low requirements.
CN105207404BActive Publication Date: 2017-08-01CHANGZHOU KAIDI ELECTRICAL INC
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Patent Information

Authority / Receiving Office
CN ยท China
Patent Type
Patents(China)
Current Assignee / Owner
CHANGZHOU KAIDI ELECTRICAL INC
Publication Date
2017-08-01

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Abstract

The invention relates to an electric drive device applied to a lifting table, a lifting chair, a lifting bed and the like, in particular to an electric push rod, and aims to solve the problems that an existing electric push rod with a big lead and a self-locking function is high in cost, prone to being damaged and the like. According to the scheme, a motor output shaft of the electric push rod is provided with a damping device for acting on the output shaft, the damping device comprises two or more friction shoes arranged on the output shaft in a holding mode, the outer rings of the friction shoes are sleeved with a spiral spring for tightly holding friction shoes onto the output shaft, the two axial ends of each friction shoe are provided with anti-falling bosses for preventing the spiral spring from falling off, one or more anti-falling bosses are radially extended into rotation stopping fins, the rotation stop fins are blocked by a blocking block on a motor shell for preventing the friction shoes from rotating along with the output shaft, and the inner walls, in contact with the output shaft, of the friction shoes are provided with axial oil storage grooves.
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Description

technical field

[0001] The invention relates to an electric drive device applied to lift tables, lift chairs, lift beds, etc., in particular to an electric push rod. Background technique

[0002] The electric push rod is an electric linear propulsion device used according to the needs of lifting tables, chairs and beds. The general structure is that the output end of the motor output shaft is made of a worm, and the worm gear meshing with the worm is set on the long screw. The screw is covered with a nut that is prevented from rotating, so that the high-speed rotation of the motor is converted into a relatively low-speed linear movement of the nut, and the push rod (or slider) is connected to the nut or made into one piece as a part of the output motion. .

[0003] This kind of electric push rod often needs to have a self-locking function during use. For example, the desktop can stop at any height during the process of being raised. The self-locking angle and / or the helix ...

Claims

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