Over-speed protection device of elevator

Abstract

The invention discloses an over-speed protection device for an elevator. The over-speed protection device structurally comprises a protective shell, a foot pad, a rotary table, a fixing block, a firstspring, a pawl, a wire rope, a pawl disk, a fixing rod, a pull rod, a deceleration block, a second spring, a dust-proof device and a fixing device. According to the design, the dust-proof device is arranged at the top end face of the protective shell, and a worker can rotate a supporting plate leftwards after maintaining a speed governor; the supporting plate drives the fixing plate to rotate leftwards when rotating, and a rotating block is driven to rotate leftwards through a bearing; when the supporting plate rotates leftwards, a dust cover is pushed to rotate to the surface of the protective shell so as to prevent parts in the protective shell against dust; heat generated during long-term rotation of the rotary table is discharged through a ventilation net, so that the beneficial effects of dust prevention and protection of the parts in the protective shell are realized.

Description

technical field [0001] The invention relates to the technical field of speed governors, in particular to an elevator overspeed protection device. Background technique [0002] At present, there are two main types of speed limiters commonly used in the market: centrifugal type and resonance type. The centrifugal type is designed based on the relationship between centrifugal force and rotation speed. The centrifugal hammer will be thrown enough to trigger the position of the speed limiter, so that the speed limiter will act, so as to realize the speed monitoring. [0003] However, the existing speed limiter does not have the function of dustproofing the inside of the protective shell, which leads to the problem that the dust accumulated on the surface of the turntable and the pawl plate affects the use of the speed limiter, and does not have the function of fixing the dust cover, which leads to the problem of working The personnel did not fix the dust cover well, so that the ...

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the deficiencies of the existing technology, an elevator overspeed protection device is proposed, which solves the problem that the existing speed limiter does not have the function of dustproofing the inside of the protective shell, resulting in the dust accumulated on the surface of the turntable and the pawl disc affecting the use of the speed limiter. The problem is that it does not have the function of fixing the dust cover, which leads to the problem that the staff did not fix the dust cover, making the dust cover unable to prevent dust

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