Emergency stop switch

Abstract

The invention provides an emergency stop switch. The emergency stop switch comprises a limiting assembly, a pressing assembly and a contact piece assembly, wherein the limiting assembly comprises a nut; a partition plate with a through hole is arranged in the middle of the nut; one side of the partition plate is connected with a hollow bolt in a screw joint manner while the other side of the partition plate is connected with a crown-shaped fixed base in a screw joint manner, and a slideable middle column is arranged in the hollow bolt in a sleeving manner; a through hole is formed in the center of the middle column; the pressing assembly comprises a control rod arranged in the through hole of the middle column; one end of the control rod is connected with a button while the other end of the control rod passes through the through hole of the nut to extend to the crown-shaped part of the fixed base; the contact piece assembly comprises a moving contact piece and a static contact piece arranged in the crown-shaped part of the fixed base; and the moving contact piece is connected with the other end of the control rod. The emergency stop switch is simple in structure, relatively less in used parts, and convenient to machine, manufacture and install, so that the strength level and the explosive-proof grade are improved to a certain degree, and the emergency stop switch is not damaged easily.

Description

technical field [0001] The invention relates to the field of electrical control equipment, in particular to an emergency stop switch. Background technique [0002] The emergency stop switch is a kind of master control electrical appliance. When the running equipment is in a dangerous state, the emergency stop switch cuts off the power supply and stops the operation of the equipment to achieve the purpose of protecting personal and equipment safety. [0003] The traditional emergency stop switch is usually a manually controlled push-button switch (the button is red), which is connected in series to the control circuit of the equipment. In an emergency, the control circuit can be directly disconnected to quickly stop the equipment to avoid abnormal operation of the equipment. [0004] Such as figure 1 As shown, an existing emergency stop switch is composed of a housing 1, a control lever 2, an operating handle 3, a contact assembly and a locking device. in: [0005] The hou...

AI Technical Summary

Problems solved by technology

[0011] It is necessary to absolutely avoid the occurrence of abnormal conditions in coal mines, so emergency stop switches are often used. However, due to the harsh and complicated working environment underground, the air is humid, and there are dangerous gas, coal dust and other flammable and explosive substances, Therefore, the requirements for the emergency stop switch are very high

The above-mentioned commonly used emergency stop switch has complex structure, many parts, low explosion-proof grade, low strength, and is easy to be damaged, so it cannot meet the harsh industrial and mining environment requirements in underground mines.

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