CN101205046B - Harbor crane lifting clutch - Google Patents

Abstract

The invention provides a port crane lifting clutch, which relates to the control over an elevator. The object of the invention is providing a port crane lifting clutch with high descending speed and safety as well as reliability. The main points of the technical proposal of the invention are as follows: the port crane lifting clutch comprises an electric power hydraulic brake; a ring braking belt is arranged on a cylinder of an outer end of a drum; two ear plates are fixedly connected with the two ends of the ring braking belt; a shaft is arranged on a bearing chock; an end of a connecting rod is articulated with a flexible plate which is fixedly connected with the shaft, and the other end is articulated with one ear plate; another ear plate is articulated with the bearing chock through the connecting rod; a ring internal clutch belt is arranged on the inner surface of the outer end of the drum; splined holes in the center of the clutch plate are connected with a rising main shaft; the top of the flexible plate is articulated with the clutch plate; an upper end of the ring internal clutch belt is articulated with the ear plate on the end of the internal clutch belt through a connecting rod; a lower end is articulated with the end of a cylinder piston rod; the ear plate on the other end of the internal clutch belt is articulated with the clutch plate. The invention is used for a crane.

Description

A kind of harbor crane lifting clutch

Technical field:

The present invention relates to a kind of control of elevator, particularly a kind of harbor crane lifting clutch.

Background technology:

Existing harbour wheel-mounted crane relies on normally that the elevator reel is positive and negative to transfer realization when the lifting weight, when weight descends, the motor counter-rotating becomes electrical generator and produces electric energy, and making descends is in the resistance braking state, thereby descending speed is slower, and have only a descending speed, influence handling efficiency.

Summary of the invention:

The purpose of this invention is to provide the fast and safe and reliable harbor crane lifting clutch of a kind of descending speed.Technical scheme of the present invention is, a kind of harbor crane lifting clutch, comprise electrohydraulic brake, it is characterized in that: the annular stop band of an opening places on the cylinder of reel outer end, the two ends of this annular stop band otic placode that respectively is connected is provided with a rotating shaft on bearing seat, an end of connecting plate is hinged with the connecting lever that is connected in the rotating shaft, the other end and otic placode are hinged, and another otic placode is hinged by a connecting rod and bearing seat; Clutch-band places on the inside face of reel outer end in the annular of another opening, the splined hole at clutch discs center is connected with the main shaft that hoists, the top and the clutch discs of pendulum plate are hinged, the upper end of this pendulum plate is hinged by the otic placode of the termination in a connecting rod and the interior clutch-band two ends, lower end and piston rod end are hinged, with cylinder that clutch discs is connected mutually in piston and the piston rod between the cylinder end face on be provided with spring, be provided with pore in the clutch discs and be communicated with hoist pore in the main shaft and the air chamber in the cylinder, the otic placode and the clutch discs of another termination in the above-mentioned interior clutch-band two ends are hinged.On the annular stop band, be provided with the full circle device, the seat of this full circle device is fixed on the support ring, in the tapped bore of the present bottom of one screw threads one side, the termination of this screw contacts with the annular stop band, in the tapped bore of the present top of another screw threads opposite side, the two ends of spring respectively be spun on a tapped bore of top opposite side in another screw be connected with ring on being fixed on the annular stop band.Be provided with the full circle device on interior clutch-band, this full circle device is identical with full circle device on the outer brake collar, and the seat of this full circle device is fixed on the clutch discs.The present invention has the fast and safe and reliable advantage of descending speed compared with the prior art.

Description of drawings:

Fig. 1 is the front view of portal crane power-transfer clutch of the present invention, and Fig. 2 is the birds-eye view of Fig. 1, and Fig. 3 is the A-A section-drawing of Fig. 2.

The specific embodiment:

In conjunction with above accompanying drawing the present invention is elaborated, lifting motor 10 uses when only doing to promote weight, stops operating during decline, does not work.On the bearing seat 3 of reel 7 outer faces, be provided with a rotating shaft 1, connect a connecting lever 12 in the rotating shaft, on the cylinder of reel outer end, be provided with the external-expanding type drg, its China and foreign countries' brake collar 6 places on the cylinder of reel outer end, outer brake collar is two, its two ends respectively are fixed with otic placode 14, bolt 21 is through in the hole of two otic placodes of this two outer brake collars termination, on the bolt between two otic placodes, be provided with spring 22, the otic placode of the other end of one outer brake collar is hinged by connecting rod and bearing seat 3, the otic placode 14 of another outer brake collar termination is hinged with an end of connecting plate 13, and the other end of this connecting plate is hinged with the connecting lever that is connected in the rotating shaft 1.In order to make outer brake collar keep circularity preferably, guarantee that braking is reliable, be evenly equipped with four full circle devices outside on the brake collar, support ring 4 is fixed on the bearing seat, seat 18 in the described full circle device is fixed on the above-mentioned support ring 4, in the tapped bore on screw threads is present, its termination contacts with outer brake collar, on the plate of the opposite side of above-mentioned seat, be provided with tapped bore and another screw 20 matches, the two ends of spring 19 are connected with set collar on the outer brake collar with the termination of above-mentioned screw 20 respectively, utilize this device the part of brake collar can not be drawn or pressed and make it to become circle in the circle place.The present invention is provided with the internal expansion type power-transfer clutch on the inside face of reel outer end, the centre hole of clutch discs 28 is that splined hole is connected with the main shaft 8 that hoists, cylinder 24 is connected with clutch discs, be provided with spring 27 on the piston rod 25 between piston 26 and the cylinder end face, clutch discs is provided with pore 23 and is communicated with air chamber between the cylinder with hoist pore in the main shaft and piston, one end and the piston rod outside the cylinder of pendulum plate 15 are hinged, the other end is hinged with the otic placode 16 of interior clutch-band 5 terminations by connecting rod 17, the other end of this clutch-band otic placode that also is connected, otic placode and clutch discs are hinged therewith respectively at the two ends of one connecting rod, on interior clutch-band, also be evenly equipped with outside brake collar on the identical full circle device of full circle device, the full circle device the seat be fixed on the clutch discs.

Braking principle of the present invention and method of operation are, be adjacent to the reel inwall under the action of the spring of interior clutch-band in cylinder of internal expansion type power-transfer clutch, the internal expansion type power-transfer clutch is a normally off, and the external-expanding type power-transfer clutch is a normally open, when hoisting weight, power hydraulic pressure block brake 9 is in the state of declutching, and motor 10 rotations drive the main shaft that hoists by retarder 11 just to be changeed by internal expansion type power-transfer clutch drive reel, mentions weight.In the time will descending weight, to make weight remain static (electrohydraulic brake braking) earlier, open gas circuit valve then, pressurized air enters cylinder through the main shaft endoporus that hoists and makes piston rod overcome spring force to move, by the pendulum plate interior clutch-band is inwardly spurred, make it throw off reel, reel quickens to descend under the weight effect, can handle connecting lever 12 when descending when too fast and rotating shaft 1 be clockwise rotated outer brake collar and reel applying are made its deceleration or stop.

Claims (3)

1. harbor crane lifting clutch, comprise electrohydraulic brake, it is characterized in that: the annular stop band of an opening places on the cylinder of reel outer end, the two ends of this annular stop band otic placode that respectively is connected, on bearing seat, be provided with a rotating shaft, one end of connecting plate is hinged with the connecting lever that is connected in the rotating shaft, and the other end and otic placode are hinged, and another otic placode is hinged by a connecting rod and bearing seat; Clutch-band places on the inside face of reel outer end in the annular of another opening, the splined hole at clutch discs center is connected with the main shaft that hoists, the top and the clutch discs of pendulum plate are hinged, the upper end of this pendulum plate is hinged by the otic placode of the termination in a connecting rod and the interior clutch-band two ends, lower end and piston rod end are hinged, with cylinder that clutch discs is connected mutually in piston and the piston rod between the cylinder end face on be provided with spring, be provided with pore in the clutch discs and be communicated with hoist pore in the main shaft and the air chamber in the cylinder, the otic placode and the clutch discs of another termination in the above-mentioned interior clutch-band two ends are hinged.

2. a kind of harbor crane lifting clutch as claimed in claim 1, it is characterized in that: on the annular stop band, be provided with the full circle device, the seat of this full circle device is fixed on the support ring, in the tapped bore of the present bottom of one screw threads one side, the termination of this screw contacts with the annular stop band, in the tapped bore of the present top of another screw threads opposite side, the two ends of spring respectively be spun on a tapped bore of top opposite side in another screw be connected with ring on being fixed on the annular stop band.

3. a kind of harbor crane lifting clutch as claimed in claim 1 is characterized in that: be provided with the full circle device on interior clutch-band, this full circle device is identical with full circle device on the outer brake collar, and the seat of this full circle device is fixed on the clutch discs.

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