CN2101662U - Limit device for hoist - Google Patents

Abstract

The utility model relates to a limit device for a hoister, which is composed of a slide block direction guide pipe 1, a screw rod 2, a lower fixing bearing 3, an upper fixing bearing 4, a nut slide block 5, a limit switch 7, etc. The utility model is characterized in that an extending portion 10 of the screw rod 2 is provided with a taper gear 11 which is meshed with a taper gear arranged on a winding drum shaft of a hoister, and the limit device is vertical with a drum shaft of a drum of a hoister and arranged on the edge of a hoisting machine body. The utility model has the advantages of small size, small occupation land, high reliability, convenient maintenance, convenient installation and convenient disassembly, and besides, the utility model is widely used for hoisting devices for construction and lifting devices for other industries.

Description

Limit device for hoist

The utility model belongs to the spacing control convenience of winch.

The winch that construction trade is used at present, usually a device of all not limiting, bring some drawbacks to site operation, as the winch of the vertical transport of construction site, start people spirit does not have slightly to be concentrated, misoperation appears, after bont reached the top, continue again to promote, cause steel rope to be broken, weight falls, and the disastrous accident occurs.Existing inhibiting device is the top that limit switch is installed in bont, when weight that hoisting cable is carried outreaches, connects top stall switch to realize position-limiting action.This inhibiting device has installs inconvenience, establish a very long secondary control line, and the secondary control line is easy to generate new safety hazard again.Chinese patent GG87206077 discloses a kind of elevator limiting device of winch.Be at lifting drum axle axle head relative fixed one coaxial line screw rod, screw in a traveling nut slide block on the screw rod, it is fixed on the constraint of the guide rail on the winch frame, places uplink and downlink limit switch (normally closed) respectively and control the winch stroke by the distance of adjusting slider and limit switch on guide rail.This device has been because of directly having prolonged the lifting drum axle, and it is big to have a plant area area, and construction is inconvenient, and its cantilevered mounting means has influenced reliability of service, and this device is unfavorable for the repairing and the inspection of equipment.

The purpose of this utility model be to overcome the deficiencies in the prior art and provide that a kind of safe reliability height, floor area are little, convenient for maintaining inspection, the rational winch inhibiting device of installation applied widely.

The technical solution of the utility model is: limiting device is made an independent assembly, when this assembly is installed and the lifting drum axle axially intersect 90 °, draw a short concentric shafts on the lifting drum axle, fix a cone gear on the concentric shafts, be meshed with cone gear on the limiting device.

Cone gears on limiting device, the winch etc. constitute inhibiting device jointly.Limiting device is by a square metal urceolus, slider guide pipe, screw rod and screw rod two ends fixed type bearing, compositions such as square nut slide block and limit switch.Square nut is contained on the screw rod, screw rod is fixed in the slider guide pipe by the fixed type bearing at two ends, screw rod is on the sponson of fixed type bearing lower end, cone gear is housed, and this cone gear is meshed with cone gear on the lifting drum axle, and inhibiting device is loaded on elevator body limit perpendicular to the lifting drum axle, reduced floor area, the inhibiting device two ends are fixed on the elevator body, have made things convenient for to remove and install, and have improved safety and reliability.The lifting drum axle drives screw rod by cone gear and rotates, and the square nut slide block is done straight-line displacement in square tube along with the rotation of screw rod, when slide block arrives the position that will limit, touches limit switch (normally closed) action, lead in the disconnection.At this moment, winch one is halted state (extreme position because of having risen to), the 2nd, start downing switch, and operation descends.Contact position at slide block has a fine setting screw rod, by fine adjustment screw one week of cylinder is divided into 10～100 parts, adjusts fine adjustment screw, the error of inhibiting device once can be adjusted in 10 millimeters.Cone gear on the utility model drum shaft and the limiting device, can adopt the collocation of different model, adjust speed ratio, also can use worm gear screw rod and chain sprocket drive mode, under the situation that does not increase and reduce ram travel, measurement range is further enlarged, can adapt to the needs of different type of machines occasion.

Fig. 1 is the structural representation of winch inhibiting device.

Fig. 2 is winch inhibiting device assembling scheme drawing.

Below in conjunction with accompanying drawing the winch inhibiting device is further described.

Among Fig. 1, slider guide pipe 1 is made by square metal tube, fixed type bearing 3 on the screw rod 2, fixed type bearing 4 and being fixed in the slider guide pipe 1 down, nut slider 5 is contained on the screw rod 2, the one thin screw 6 of pressing is arranged on the nut slider 5, limit switch 7 is arranged in slider guide pipe 1, the contact 8 of limit switch 7 is corresponding with the thin screw 6 of pressing, there has been chamber 9 following fixed type bearing 4 outer ends, screw rod 2 is having a sponson 10 outside the fixed type bearing 4 down, cone gear 11 is housed on the sponson 10, and cone gear 11 is meshed with cone gear 12 on being contained in the lifting drum axle; Cone gear 11 and cone gear 12 are by the 9 airtight protections of empty chamber.On the elevator body, have two

Among Fig. 2, spacing clamp 13,14 is fixed on limit, winch side with limiting device 15 plug-in types, and 16 is lifting drum, and 17 is the short concentric shafts of drawing on the lifting drum axle, and it is the winch motor that cone gear 12,18 is housed on the concentric shafts 17.

The utility model compared with prior art has the following advantages: stopping means is installed in the hoist engine body side surface, and is reasonable in design, floor space is little, two fixed pivots is arranged, the plug-in type structure, maintenance is installed, convenient disassembly, security reliability is higher, and speed ratio is adjusted in the collocation of the different model by angular wheel, in the situation that does not increase and reduce ram travel, enlarged measurement category, can adapt to different type of machines, the needs of occasion. Be widely used in the winding plant of construction and the lifting device of other industry.

Claims (3)

1, a kind of winch inhibiting device, comprise slider guide pipe 1, screw rod 2, fixed type bearing 3,4 up and down, nut slider 5, limit switch 7 is characterized in that on the sponson 10 of screw rod 2, cone gear 11 is housed, cone gear 11 is meshed with cone gear 12 on the lifting drum axle, and limiting device 15 is perpendicular to the lifting drum axle, on elevator body limit, two spacing clamps 13,14 are arranged, and limiting device 15 plug-in types are fixed on two spacing clamps 13,14.

2, inhibiting device as claimed in claim 1 is characterized in that on the described nut slider 5, and a thin screw 6 of pressing is arranged, and carefully presses screw 6 corresponding with limit switch contact 8.

3,, it is characterized in that cone gear can adopt the collocation of different model as claim 1,2 described inhibiting device.

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