Normally closed electromechanical disc brake

Abstract

The invention discloses a normally closed electromechanical disc brake, and relates to the field of electromechanical braking and mine hoist braking. The working principle of the brake is that a torque motor is used as a power source, speed reduction and torque increase are performed through a planetary reducer, rotary motion is converted into linear motion through a ball screw pair, and a ball nut drives a piston to compress a belleville spring. The belleville spring serves as an energy accumulator to store energy for the brake. A brake execution module sequentially comprises a brake shell, the belleville spring and a ball screw from outside to inside, an end cover is installed on one side of the brake shell, a brake shoe, a brake shoe supporting piece, the ball nut, the piston and the belleville spring are sequentially installed on the other side of the brake shell from outside to inside along the axis, and the ball screw serves as an execution module input shaft and receives rotation motion and torque of a power module. A photoelectric displacement sensor is connected with the brake shoe supporting piece through a sensor support, the zero position of the photoelectric displacement sensor is aligned with the friction surface of the brake shoe, and the photoelectric displacement sensor is driven by the brake shoe supporting piece to move synchronously with the brake shoe to monitor the displacement of the brake shoe.

Description

technical field [0001] The invention relates to the fields of electromechanical braking and mine hoist braking, in particular to a normally closed electromechanical disc brake. Background technique [0002] The mine hoist is the key hub connecting the underground production system and the ground work square, and is responsible for important tasks such as transporting personnel and materials. The mine hoist must have a suitable braking torque. If the braking torque is too large, the hoist will decelerate sharply, and mechanical accidents such as slipping ropes and broken ropes will easily occur. . When the working condition of the hoist changes, the appropriate braking torque also changes, so the adjustable braking torque is an important guarantee for the reliable operation of the hoist. Article 423 of the "Coal Mine Safety Regulations" requires that the hoist must be equipped with a brake gap protection device. When the brake shoe gap exceeds the specified value, it can al...

AI Technical Summary

Problems solved by technology

At present, most mine hoists use hydraulic disc brakes, relying on the cooperation of high-pressure oil and disc springs to generate friction and form the hoisting mechanism torque. The monitoring and adjustment of the brake clearance of hydraulic brakes needs to be done manually, and the degree of automation is low. And the braking effect is easily affected by oil pollution

Images