CN2490139Y

CN2490139Y - Safety device for hoister

Info

Publication number: CN2490139Y
Application number: CN 01213684
Authority: CN
Inventors: 刘志华
Original assignee: Individual
Current assignee: Individual
Priority date: 2001-03-21
Filing date: 2001-03-21
Publication date: 2002-05-08
Anticipated expiration: 2011-03-21

Abstract

The utility model relates to an over load rope disorder limiting device which comprises a connecting axis, a pulling pole, an upper block, a lower block, a sliding block and a lead bar. The utility model can be used for controlling the overload rope disorder on the windlass or the electronic crane. The utility model is characterized in that the utility model has improved the prior device and positioned the rope disorder spring in the load limiting spring; the main pulling pole is provided downward and the utility model is water proof; when installing, the utility model can get a perfect structure by connecting the machine body on the top frame through the connecting axis; the utility model is very simple and convenient to be arranged when working indoors and outdoors; the utility model is very reliable and durable.

Description

Device for limitting excess load and preventing rope from being in non-order

The utility model relates to the elevator of traction is made in a control with winch or electric block device for limitting excess load and preventing rope from being in non-order and installation method thereof:

It is investigated that newly be used for the overload disorder cable control setup that winch or electric block are made the elevator of traction, advanced in performance at present, structure is better simply to be the device for limitting excess load and preventing rope from being in non-order (patent No. 92231991X) of gain the national patent.But yet there is following a few point defect in device:

1, body is unresolved from waterproof, and device is installed main tie and hung up on equipment, and complete machine is in up-and-down movement during work, and the waterproof case that outdoor mounted installs additional is fragile, causes the parts easy-to-rust, and electrical equipment is easy to failure.

2, its limit for tonnage and disorder cable controlling spring are the setting of axial pile formula, have increased the whole height of device.

The purpose of this utility model, it is more compact, simple to aim to provide a kind of structure, the device for limitting excess load and preventing rope from being in non-order that volume is little, work is practical reliably, water resistance is good, cost is low.

In order to solve above-mentioned task, the utility model has carried out following improvement to existing device for limitting excess load and preventing rope from being in non-order: being provided with of limit for tonnage and disorder cable controlling spring, adopted a top band outer rim, the barrel-type spring housing of middle and lower part band inner edge, the disorder cable controlling spring is placed in its cylindrical shell, and its cylindrical shell places in the limit for tonnage spring, and top places limit for tonnage spring top, be the disorder cable restraining spring by the support of limit for tonnage spring, place again in the limit for tonnage spring; Main tie is provided with down with installing in assembling, body maintains static when making it that back work is installed on equipment, and the piece center is opened a circular hole one one end band disk one end boring middle part of packing into and is shaped on the cylinder adapter shaft of half slot on the body top, be that this device penetrates steel rope or shackle when doing practical installation the on the elevator of traction with winch or electric block on equipment and connects hoist rope end joint connection place on the equipment upper frame in the hole that this adapter shaft bored, again with its hoist rope end joint connection on its main tie.

Because this practicality is novel have been placed the disorder cable controlling spring within the limit for tonnage spring, main spring shared height in machine is reduced, machine volume is reduced greatly, also saved a spring housing; Because main tie is provided with down, the utility model is after installing on the equipment, maintain static during its body work, possibility rises, body top, adopt gluing or rubber seal, not only can solve this device from waterproof, and the cylinder coupling spindle that is provided with of body top, also can install simple and easy flexible water dust boot easily additional, make this device outdoor mounted more can waterproof and dustproof, the anti-width of cloth penetrates.

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

Accompanying drawing 1 is a front view of the present utility model;

Accompanying drawing 2 is upward views of the present utility model;

Fig. 1, among Fig. 2, adapter shaft 1 is provided with step for the lower end, top axial two facing cut flat drills have circular hole, the middle part car has the poor circular shaft of arc, 17 times pieces of last piece 25 are the rectangle steel scutum, all be as the criterion on it and be drilled with four circular holes that penetrate with guide rod 7 threaded portions with the center, last piece 17 centers are shaped on the circular hole that passes with adapter shaft 1, long being drilled with the lance smooth section to a marginal belt boss place is the circular hole of running-fit, four edge upper part are all protruded a thin outer rim, following piece 25 centers be shaped on main tie 21 smooth section be the circular hole of running-fit, guide rod 7 is that the smooth two of interlude is shaped on the steel round bar less than the screw thread of smooth section diameter, slide block 8 is the steel rectangular plate, be drilled with a circular hole that penetrates with main tie 21 at the plate center, sentencing the plate center at plate four jiaos is as the criterion, be drilled with axis and last piece 17 times pieces 25 consistent be four circular holes of running-fit with guide rod 7, its rectangle length is provided with the travel switch seat board to the place, two edges, the screw of fixed journey system switch on its seat board size and the plate, can rush open travel switch by lance, hit again less than the switch collision point limit and determine, limit for tonnage spring 21 is the bigger stage clip of modulus of rigidity, its modulus of rigidity is determined by the limit for tonnage hoisting capacity of equipment, disorder cable controlling spring 9 is the less stage clip of modulus of rigidity, its modulus of rigidity is determined by the equipment minimum stretching force that steel rope should not have during disorder cable, spring housing 20 is the cylindrical shell of band outer rim middle and lower part, top band inner edge, its top physical dimension is determined by the middle footpath greater than limit for tonnage spring 21, its cylinder body outer wall size is determined by the internal diameter of this spring, its cylinder internal diameter is pressed the external diameter of disorder cable controlling spring 9 and is determined, its cylindrical shell inner edge is determined at the height that the maximum compressibility lower spring that allows should have by disorder cable controlling spring 9 to the height on tube top, its cylindrical shell bottom-to-top-height determines that at the height that the maximum compressibility lower spring that allows should have main tie 22 is that a upper end is shaped on screw thread by limit for tonnage spring 21, the lower end has a big step to be shaped on the smooth circular shaft that symmetrical plane is shaped on circular hole.Lance 12,15 is that an end is shaped on disk, and a smooth round bar that is shaped on screw thread is carved with the hoisting capacity scale that calculates according to limit for tonnage spring 21 modulus of rigidity on the round bar of lance 12, and lance

spring

13,18 is the less stage clip of modulus of rigidity.Shield plate 11 be two band flangings with two not with the certain thickness sheet steel of having of flanging, waterproof and dustproof cover 23 forms according to installing the pressing of overall dimensions diathermic heating for soft waterproof fibre or Buddhist nun's logical sequence cloth.

After this carries out novel assembling, main tie 22 penetrates from following piece 25 centers, pass successively limit for tonnage spring 21 is housed, spring housing 20, disorder cable controlling spring 9, slide block 8, jam nut 6 is housed, spring cotter 4, four guide rods 7 pass slide block 8 usefulness nuts and have connected last piece 17 and following piece 25, guide rod 7 penetrate with last piece 17 holes in part all smear waterproof gasket cement, adapter shaft 1 is loaded onto 3 backs, collision mat river and is passed from last piece 17 centers, lance 15 puts and after little spring 18 passes the made boss circular hole of piece 17 double nuts is installed, on double nuts, be with waterproof jacket 16, lance 12 puts and after little spring 13 passes down the made circular hole in piece 25 left sides double nuts is housed,

travel switch

10 and 19 is loaded on respectively on the set switch seat board of slide block, its connecting wire is that four leads are connected to its normally closed contact respectively with drawing in the cable slave, under the flange that last piece 17 is shaped on, water proof rubber circle 5 is housed, with following piece 25 edges shield plate 11 is housed at last piece 17, water proof and dust proof cover 23 is equipped with at the poor place of the circular arc on adapter shaft 1.

The utility model after the assembling, disorder cable controlling spring place in the spring housing by the inner edge support, and the spring housing apical margin places on the limit for tonnage spring, makes two springs still have the function of effect respectively, and whole height is reduced greatly, and it is the most reasonable that structure has been accomplished.Piece connect and is one about its four guide rods were incited somebody to action, four guide rods in body top and last piece be tightly connected for gluing, the shield plate that install in the adapter shaft step place that last piece is installed and the outside, four limits all is provided with rubber pad, the top lance penetrates the hole and also installed waterproof jacket additional on the lance top except that establishing boss, outdoor mounted has avoided rainwater fully in top infiltration machine, the flexible water dust boot that is loaded on the adapter shaft is packed into from the adapter shaft top, after the poor place of the set circle of adapter shaft ties eck with rope, covered complete machine, and installed, changed very convenient from adapter shaft.

The elevator kind of doing traction with winch or electric block is more, be that example is illustrated with building operation with material elevator and indoor warehouse Cargo Lift now: this kind equipment is generally by body of the tower, upper frame, hang the hurdle, pulley, steel rope, traction equipment is formed, the equipment of doing traction with winch generally has a steel rope tail end bearing on upper frame, be that steel cable sends from winch, the movable pulley that is connected hanging basket or suspension hook by the set pulley of ground and upper frame, be fixed on the upper frame again, make the elevator of traction with electric block, its cucurbit generally suspends and is fixed in upper frame, steel rope lays out from reel, walk around suspension hook or hang the movable pulley on hurdle, be fixed in again on the casing of cucurbit, the utility model is installed, be about to adapter shaft 1 usefulness steel cable or shackle and be fixed in equipment steel rope tail end bearing, the steel rope tail end of again it being pulled down is fixed on the main tie 22, with two wiring that are connected to limit for tonnage travel switch 10 normally closed contacts of drawing in its machine, being serially connected with control convenience hoists on the coil one wiring pile crown pig-tail wire of power circuit AC contactor of operation, two wiring that are connected to disorder cable control travel switch 19 normally closed contacts of drawing are serially connected with control convenience and do descend on winding wiring pile crown one pig-tail wire of power circuit AC contactor of operation, hoisting capacity by the equipment requirement, the modulus of rigidity of work structuring characteristic and limit for tonnage spring 21 and disorder cable controlling spring 9 is adjusted lance 12 and travel switch 10, the distance of lance 15 and travel switch 19.By the utility model structure as can be known: when pull of steel wire increases, main tie 22 will be adorned drive slide block 8 and move down, be contained in the control that travel switch 19 on the slide block 8 will break away from lance 15 and be in on-state, the equipment decline normal operation that can hoist, when hanging hurdle or suspension hook loading above the limit for tonnage setting value, lineoutofservice signal pull also can be greater than setting value, main tie 22 drives slide block 8 and has also moved down big distance, the travel switch 10 that is loaded on slide block 8 is pressed to lance 12, make normally closed contact be in off-state, the power circuit ac contactor coil that control convenience is done to hoist cuts off the power supply, equipment shuts down, thereby has controlled the overload of equipment effectively; When starting outfit makes hanging basket drop to ground or middle when being put by card, pull of steel wire can reduce suddenly, when pulling force is reduced to a certain degree, slide block moves under the elastic force effect of

spring

21,9, the travel switch 19 that is contained on the slide block is pressed to lance 15, normally closed contact is opened be in off-state, the power circuit ac contactor coil that control convenience is done to descend cuts off the power supply, equipment stops to descend, thereby it is unlikely loose to have controlled on the equipment reel steel rope effectively, has promptly controlled the disorder cable of equipment effectively.

Claims

1, a kind of by the limit for tonnage spring, the disorder cable controlling spring, spring housing, last piece, following piece, slide block, main tie, adapter shaft, lance, protective cover, the water proof and dust proof cover is formed is used for the device for limitting excess load and preventing rope from being in non-order that winch or electric block are made the elevator of traction, it is characterized in that: being provided with of limit for tonnage and disorder cable controlling spring, adopted a top band outer rim, the barrel-type spring housing of middle and lower part band inner edge, the disorder cable controlling spring is placed in its cylindrical shell, its cylindrical shell places in the limit for tonnage spring, top places limit for tonnage spring top, be that the disorder cable restraining spring is by the support of limit for tonnage spring, place again in the limit for tonnage spring, when assembling and on equipment, installing, main tie is provided with down, and a circular hole is opened at the piece center on the body top, one the one end band disk of packing into, the boring of one end, the middle part is shaped on the cylinder adapter shaft of half slot, in the hole that this adapter shaft bored, penetrate steel rope or shackle when on the elevator of doing traction with winch or electric block, installing and connect hoist rope end joint connection place on the equipment upper frame, again with its hoist rope end joint connection on its main tie.

2, device for limitting excess load and preventing rope from being in non-order according to claim 1 is characterized in that: its top physical dimension of this spring housing is determined by the middle footpath greater than the limit for tonnage spring, its cylinder body outer wall size is determined by the internal diameter of this spring, its cylinder internal diameter is pressed the external diameter of disorder cable controlling spring or is pressed structural requirement and determine, its cylindrical shell inner edge at height that the maximum compressibility lower spring that allow should have determines by the disorder cable controlling spring that to the height on tube top its cylindrical shell bottom-to-top-height is determined at the height that the maximum compressibility lower spring that allows should have by the limit for tonnage spring.

3, device for limitting excess load and preventing rope from being in non-order according to claim 1 is characterized in that: this main tie that is provided with down is that a upper end is shaped on screw thread, the lower end has a big step to be milled with the smooth circular shaft that symmetrical plane is shaped on circular hole, during assembling, its smooth section penetrates from following piece center, passes limit for tonnage spring, spring housing, disorder cable controlling spring, slide block successively, jam nut, spring cotter are housed;

4, device for limitting excess load and preventing rope from being in non-order according to claim 1, it is characterized in that: described frame, by guide rod with nut last piece, following piece fuses and forms, last piece, following piece is the rectangle steel scutum, all be as the criterion on it and be drilled with four circular holes that penetrate with the guide rod threaded portion with the center, last piece center is shaped on the circular hole that passes with adapter shaft, long being drilled with the lance smooth section to a marginal belt boss place is the circular hole of running-fit, four edge upper part are all protruded a thin outer rim, it is the circular hole of running-fit that following piece center is shaped on the main tie smooth section, and guide rod is that the smooth two of interlude is shaped on the steel round bar less than the screw thread of smooth section diameter.