CN200943025Y

CN200943025Y - Circular ring draw-pressing type weight limiting device

Info

Publication number: CN200943025Y
Application number: CN 200620098956
Authority: CN
Inventors: 荣键
Original assignee: Individual
Current assignee: Individual
Priority date: 2006-09-11
Filing date: 2006-09-11
Publication date: 2007-09-05
Anticipated expiration: 2016-09-11

Abstract

The utility model discloses a circle pull-press weight limiter, which comprises a circle and a lid, wherein the circle is provided with an arc-shaped board therein; the contact lever shell prices through the arc-shaped board upward and fixed by the screw cap with the micro switch; the overload fixation screw cap fixes the damping rubber pad and the square pad onto the inner wall of the circle; and the lower end of the adjustable screw face opposite to the movable contact lever. The limiter is characterized in that the two sides of the inner wall of the circle are respectively provided with an inner ear with an inner connection hole; and an external connection hole is arranged on the position corresponding to the internal connection hole of the lid and the circle. The utility model is applicable for the pulling force and the pressure overload limit protection for the crane equipment. By equipping different external connected device, the different pulling force and the pressure overload limit protection functions cab realized. At the same tine the external adjustment method is used so that in case of adjustment in the upper air or the adjustment with load, the lid needs not to be opened. Adjustment of a weight limiter only spends a few minutes and the operation is convenient, safe and reliable, and the adjusting precision can reach as high as over 98%.

Description

Annulus stretching-compression type weight limits device

Technical field

The utility model relates to the weight limits device, especially relates to a kind of annulus stretching-compression type weight limits device that carries out load conversion, overload warning, overload outage when being used for lifting.

Background content

The pulling force ring weight limits device that uses on existing tower crane, the building hoist all is to be processed with two ring ears in the ring body outside of stressed ring basically, on the ring ear, be processed with a connecting bore, adopt this connection mode generally only to be applicable to weight limits when being subjected to pulling force, can not be suitable for the weight limits when being stressed, simultaneously because the width between centers of installing is long, so the installation site of easy limits product, cost is also bigger in addition, and commonality is poor.

Summary of the invention

The purpose of this utility model be to provide a kind of not only can when being subjected to pulling force, play the weight limits effect, but also can when being stressed, also can play weight limits effect, high precision, outside adjust, totally-enclosed, cost is low, commonality good, fragile, not safe and reliable annulus stretching-compression type weight limits device.

The purpose of this utility model is achieved in that the utility model comprises torus and cover plate; be processed with the ring groove that " O " shape seal ring has been installed in toric centre; the edge is subjected to force direction that a cambered plate is installed in torus; the two ends of cambered plate are fixed on the toric inwall; the feeler lever shell of the micro-switch below cambered plate is upward through cambered plate and by nut micro-switch and cambered plate is fixed together; be processed with at toric top and run through toric screw hole; can debug screw and pass screw hole downwards successively; Shockproof rubber pad and square backing plate; being spun on the overburden hold-doun nut that can debug the screw bottom is fixed on Shockproof rubber pad and square backing plate on the toric inwall; the movable feeler lever of the lower end that can debug screw in the feeler lever shell of micro-switch; feature is along being subjected to the inwall both sides of force direction respectively to be processed with an inner ear in torus; on inner ear, be processed with one and be used for the interconnecting hole that links together with protected device; connecting bore outside cover plate and the corresponding position of toric interconnecting hole are processed with is by interior; outer connecting bore plays the effect of pulling force or pressure weight limits.

The utility model is along being subjected to the inwall both sides of force direction respectively to be processed with an inner ear in torus; on inner ear, be processed with one and be used for the interconnecting hole that links together with protected device; connecting bore outside cover plate and the corresponding position of toric interconnecting hole are processed with; one with two outer connecting bores during installation is fixed on the tower machine fixed mount; another is connected with pulley; perhaps of two outer connecting bores is fixed on the transmission device of building hoist, the other end is connected with the cage of building hoist.Its principle of work is: the time spent of doing that is subjected to external broach or external pressure at torus, the capital makes the torus distortion, its in-to-in cambered plate is distortion thereupon also, cause the micro-switch on the screw debugged and the cambered plate on the torus to relatively move, when being subjected to pulling force and being out of shape, when the lower end of screw touches movable feeler lever in the feeler lever shell of micro-switch, the micro-switch action, normally closed contact becomes off-state, and normally open contact becomes on-state, and the mode of operation of external circuit is changed.Otherwise, when being under pressure when distortion, to withdraw from the movable feeler lever of the lower end of screw from the feeler lever shell of the micro-switch that touches, the micro-switch dynamic duty transfers static state to, on-state often become open, off-state becomes normally off, and the mode of operation of external circuit is changed.

The utility model adopts the external regulation type method, need not open cover plate when adjusting in the high-altitude, and adjusting a weight limits device only needed about 5-10 minute, the required tonnage of adjusting is exactly actual tonnage, and is simple and convenient, safe and reliable, improved the work efficiency when adjusting greatly, precision can reach more than 98%.Therefore the utlity model has the weight limits effect of not only can when being subjected to pulling force, playing, but also can when being stressed, also can play weight limits effect, high precision, adjust outward, totally-enclosed, cost is low, commonality good, be fit to can to pull down earlier before personal management, the dismounting of tower machine installation again, fragile, not safe and reliable advantage, the utility model is applicable to the overweight limiting protecting of pulling force, pressure of weight-lifting equipment.

Description of drawings

Fig. 1 is an inner structure scheme drawing of the present utility model;

Fig. 2 is the schematic top plan view of Fig. 1;

The surface structure scheme drawing of Fig. 3 during for the actual installation of the utility model dextrorotation after turning 90 degrees.

The specific embodiment

Below in conjunction with embodiment and contrast accompanying drawing the utility model is described in further detail.

The utility model comprises torus 1 and cover plate 17; be processed with the ring groove 3 that " O " shape seal ring 4 has been installed in the centre of torus 1; the edge is subjected to force direction that a cambered plate 12 is installed in torus 1; the two ends of cambered plate 12 are fixed on the inwall of torus 1; the feeler lever shell 13 of the micro-switch 14 below cambered plate 12 is upward through cambered plate 12 and by nut 11 micro-switch 14 and cambered plate 12 is fixed together; be processed with the screw hole 5 that runs through torus 1 at the top of torus 1; can debug screw 6 and pass screw hole 5 downwards successively; Shockproof rubber pad 7 and square backing plate 8; being spun on the overburden hold-doun nut 9 that can debug screw 6 bottoms is fixed on Shockproof rubber pad 7 and square backing plate 8 on the inwall of torus 1; the movable feeler lever 10 of the lower end that can debug screw 6 in the feeler lever shell 13 of micro-switch 14; the edge is subjected to the inwall both sides of force direction respectively to be processed with an inner ear 2 in torus 1; on inner ear 2, be processed with one and be used for the interconnecting hole 15 that links together with protected device; connecting bore 16 outside the interconnecting hole 15 corresponding positions of cover plate 17 and torus 1 are processed with is by interconnecting hole 15; outer connecting bore 16 plays the effect of pulling force or pressure weight limits.

One in two outer connecting bores 16 is fixed on the tower machine fixed mount, and another is connected with pulley and cage.

Claims

1; a kind of annulus stretching-compression type weight limits device; comprise torus (1) and cover plate (17); be processed with the ring groove (3) that " O " shape seal ring (4) has been installed in the centre of torus (1); the edge is subjected to force direction that a cambered plate (12) is installed in torus (1); the two ends of cambered plate (12) are fixed on the inwall of torus (1); the feeler lever shell (13) of the micro-switch (14) below cambered plate (12) is upward through cambered plate (12) and by nut (11) micro-switch (14) and cambered plate (12) is fixed together; be processed with the screw hole (5) that runs through torus (1) at the top of torus (1); can debug screw (6) and pass screw hole (5) downwards successively; Shockproof rubber pad (7) and square backing plate (8); being spun on the overburden hold-doun nut (9) that can debug screw (6) bottom is fixed on Shockproof rubber pad (7) and square backing plate (8) on the inwall of torus (1); the movable feeler lever (10) of the lower end that can debug screw (6) in the feeler lever shell (13) of micro-switch (14); it is characterized in that: the edge is subjected to the inwall both sides of force direction respectively to be processed with an inner ear (2) in torus (1); on inner ear (2), be processed with one and be used for the interconnecting hole (15) that links together with protected device, connecting bore (16) outside the corresponding position of interconnecting hole (15) of cover plate (17) and torus 1 is processed with.