Self-balancing progressive elevator safety gear

Abstract

The invention discloses a self-balancing progressive elevator safety gear, which comprises a semi-enclosed horizontal outer frame, a U-shaped inner frame that can slide horizontally in the horizontal outer frame, and a U-shaped inner frame at one end of the U-shaped inner frame. The inner side is provided with a friction plate, and the other end is provided with an adjusting screw passing through the U-shaped inner frame, and the nut part of the adjusting screw is located outside the U-shaped inner frame; the inner side of the U-shaped inner frame is provided with a push plate; One side is against the adjusting screw, the other side is connected with a compression spring, the other end of the compression spring is connected with a pressure plate, a wedge is set between the pressure plate and the friction plate on the U-shaped inner frame, and the side of the pressure plate close to the wedge is an inclined surface , the side of the wedge close to the pressure plate is an inclined surface, and the other side of the wedge is provided with a friction plate. The invention can automatically balance the clamping force on both sides when the elevator car is braked, so that the elevator car can be braked stably, and the invention has simple structure, convenient assembly, small size and convenient installation.

Description

technical field [0001] The invention relates to an elevator safety gear, in particular to a progressive elevator safety gear. Background technique [0002] In the elevator system, the progressive safety gear is an essential safety device. It is usually fixed on the elevator car. When the elevator runs abnormally and the overspeed governor operates, the lifting mechanism will pull the wedge on the progressive safety gear to clamp the elevator guide rail to brake elevator car. [0003] But at present there are mainly two types of progressive safety gears, one is symmetrical, which requires two wedges to be symmetrically divided and act at the same time. The main problem with this structure is that the structure is complex and the volume is large. The installation is cumbersome, the cost is high, and the force cannot be completely balanced; the other is asymmetrical, it only has a wedge on one side, and the other side is directly the friction plate. When braking, the side wit...

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Problems solved by technology

[0003] But at present there are mainly two types of progressive safety gears, one is symmetrical, which requires two wedges to be symmetrically divided and act at the same time. The main problem with this structure is that the structure is complex and the volume is large. The installation is cumbersome, the cost is high, and the force cannot be completely balanced; the other is asymmetrical, it only has a wedge on one side, and the other side is directly the friction plate. When braking, the side with the wedge Obviously, the force is large, which will lead to the lateral deviation of the car as a whole when braking, and a large shake

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