A self-limiting electric push rod

Abstract

The invention discloses a self-limiting electric push rod, which belongs to the technical field of electric push rods. In order to solve the problem that the electric push rod or electro-hydraulic push rod needs to be equipped with a travel switch in the prior art, the system adds a control circuit, the structure is relatively complicated, the failure rate is high, and it cannot be used under complicated working conditions. The electric push rod includes a motor, a connecting sleeve , fixed outer cylinder liner, movable inner cylinder body, connecting head, sleeve coupling and lead screw assembly, one end of the connecting sleeve is fixedly connected with the motor, the other end is connected with the fixed outer cylinder liner, and one end of the sleeve coupling is connected The output end of the motor and the other end are connected to the screw assembly. There is a screw nut in the movable inner cylinder. The screw nut is connected with the screw assembly. The sleeve coupling is located inside the connecting sleeve. out and can reciprocate relative to the fixed outer cylinder liner, and the protruding end of the movable inner cylinder body is connected with the connecting head. It is suitable for various working conditions, especially in harsh environments, as an electric push rod to control gates, move objects, and control directions.

Description

technical field [0001] The invention specifically relates to a self-limiting electric push rod, which belongs to the technical field of electric push rods. Background technique [0002] At present, a kind of electric push rod or electro-hydraulic push rod is often used in metallurgical enterprises. They have the characteristics of small size, flexible movement, and stable work. They are generally used for control operations in long-distance, dangerous and high-altitude places. Manipulating gates, moving objects, controlling directions and other multi-functional purposes, so it is widely used, but there are the following problems in actual use, [0003] 1. DG type, DGT type, DTT type electric push rod {"Mechanical Handbook" Fourth Edition. (Volume Five). Chapter 22 216-224}, its structure consists of a motor, a reducer, a screw and a nut with a The cylinder and connecting parts have complex structure, large volume, heavy weight, inconvenient maintenance and high cost. [00...

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Problems solved by technology

[0006] Therefore, the present invention solves the problem that electric push rods or electro-hydraulic push rods in the prior art need to be equipped with travel switches. Electronic switches such as travel switches are easily affected by ambient temperature and surrounding objects, resulting in wrong travel judgments. The system adds a control circuit. The structure is relatively complex, the failure rate is high, and it cannot be used under complicated working conditions. A self-limiting electric push rod is provided, including a motor, a connecting sleeve, a fixed outer cylinder sleeve, a movable inner cylinder body, and a connecting head. The limit electric push rod also includes a sleeve coupling and a screw assembly. One end of the connecting sleeve is fixedly connected to the motor, and the other end is connected to the fixed outer cylinder liner. One end of the sleeve coupling is connected to the output end of the motor, and the other end One end is connected to the lead screw assembly, the movable inner cylinder is provided with a screw nut, the screw nut is connected with the lead screw assembly, the sleeve coupling is located inside the connecting sleeve, and the movable inner cylinder is connected from the fixed outer cylinder The inside of the sleeve passes through and can move back and forth relative to the fixed outer cylinder liner, and the extension end of the movable inner cylinder body is connected with the connecting head

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