Single-rope elevator speed limiter

Abstract

A single-rope elevator speed limiter comprises a box body, a speed limiter wheel, a ratchet wheel locking mechanism, a centrifugal mechanism, a traction rope pressing wheel, a safety clamp actuating mechanism and an elevator car traction rope, wherein a signal collector is arranged on the box body. The speed limiter is characterized in that the safety clamp actuating mechanism comprises a ratchetwheel, a lifting plate, a signal collector contact piece, a lifting swing base, a lifting rod connecting base, a lifting plate buffering device and a safety clamp actuating lifting rod; the ratchet wheel is arranged on a wheel shaft of the speed limiter, one end of the lifting plate sleeves a lifting plate shaft, the other end of the lifting plate is supported on the lifting swing base, one end ofthe signal collector contact piece is fixed to the ratchet wheel, and the other end of the signal collector contact piece is a free end; the left end of the lifting swing base is hinged between the cavity walls of a box body, the right end of the lifting swing base is a free end; the left end of the lifting rod connecting base is fixed to the lifting swing base, and the right end of the lifting rod connecting base extends out of the lifting swing base; the lifting plate buffering device is arranged at the right end of the lifting swing base, and the upper end of the safety clamp actuating lifting rod is connected with the lifting rod connecting seat; and the lower end of the safety clamp actuating lifting rod is connected with a safety clamp. The speed limiter guarantees the braking effect, and does not occupy the space in a machine room.

Description

technical field [0001] The invention belongs to the technical field of elevator safety protection devices, and in particular relates to a single-rope elevator speed governor. Background technique [0002] The elevator speed limiter is a safety protection device used to control the overspeed operation of the elevator car. When the elevator overspeed reaches the speed value enough to make the elevator speed limiter act ”) action, the elevator running circuit is disconnected by the safety switch, and the elevator stops running. At the same time, the wire rope of the speed governor pulls the drawbar of the safety gear with the help of the friction of the speed governor wheel to make the safety gear move, and the movable clamp block of the safety gear cooperates with the fixed clamp block of the safety gear to clamp the guide rail, so that The elevator car stays on the guide rail, and vice versa. [0003] In the published Chinese patent literature, all the technical information...

AI Technical Summary

Problems solved by technology

[0004] The technical problems in the above-mentioned patents are made up for by the "elevator speed limiter" disclosed in CN103991770B, and this CN103991770B can objectively realize the technical effects in the four aspects recorded in the technical effect column of its manual, but there are the following shortcomings: first, Since a safety gear brake rope is used in the structural system of the brake rope traction mechanism (that is, "safety gear actuating mechanism", hereinafter the same), the safety gear brake rope connects the brake rope disc on the ratchet wheel with the safety gear, Therefore, the connection mode between the entire elevator speed limiter and the safety gear is shown as a soft connection or a flexible connection, so the braking response speed and braking effect of the safety gear will be affected to a certain extent, and the specific performance is slow response speed. The braking effect is poor; second, since the aforementioned safety tongs brake rope is required to be used in addition to the indispensable traction rope for pulling the movement of the elevator car, the structure of the elevator overspeed governor appears to be sloppy, and specifically the elevator The speed limiter has been changed into a double-rope elevator limiter; thirdly, since the cross-sectional shape of the traction rope groove on the rim of the speed limiter wheel is semicircular, it will have an impact on the friction of the traction rope, for example, due to friction Small cause slipping situation; Fourth, although the elevator overspeed governor provided by this patent is exemplified to be used for vertically ascending and descending elevators, as known in the industry, elevator overspeed governors with similar or even the same structure can be used for oblique elevators However, when the elevator speed governor of this patent structure is used for an inclined elevator, as mentioned above, the safety mechanism used to connect the brake rope disc on the ratchet wheel with the safety gear is used in the structural system of the brake rope traction mechanism of the speed governor. and the elevator speed limiter needs to be installed in the machine room, so it not only takes up space in the machine room, but also the aforementioned safety gear brake rope (using wire rope) used to drive the safety gear action is very lengthy

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