CN2232910Y - Quick pulling device for hoisting chain of chain block - Google Patents

Abstract

The utility model relates to a quick pulling device for hoisting chain of a chain block. The utility model is characterized in that a hand wheel is provided with two screw nails for toggling a boss on a reversing notch wheel to generate a gap between the reversing notch wheel and a friction sheet. The gap can be kept due to the effect of a compression spring, so the system can complete the releasing of brake state and finish the action of quick pulling the hoisting chain anticlockwise. In this way, a hoisting hook can arrive in the working position quickly. Compared with the previous apparatus, the utility model has the advantages of simplified structure, less required parts, short processing cycle, low cost and convenient operation in use. In addition, the braking of the transmission system of the utility model is controlled by the tension amount of the hand hoisting chain.

Description

The quick pull unit of the hoisting chain of Lever Blocks

The utility model relates to a kind of hand crane tool, i.e. the quick pull unit of the hoisting chain of loop chain type Lever Blocks.

The loop chain type Lever Blocks is a kind of broad-spectrum hand crane tool.Have volume little, from heavy and light, advantage such as durable in use, easy to use.The colligation of object in being specially adapted to transport, fixing and traction.

The loop chain type Lever Blocks will make it be converted to the brake off state quickly and easily from braking mode in use, but makes the pulling of hoisting chain at high speed, thereby makes load hook arrive control position rapidly.

The various loop chain type palm cucurbits that produce at present and use adopt the device of various structures to finish the above-mentioned conversion from braking mode to the brake off state.Adopted by the different control position of steering handwheel as Chinese patent application 94206353.8, made the method that produces the gap between commutation ratchet and friction lining come brake off under the effect of special " arrangement of clutch ", but made the pulling of hoisting chain at high speed.The apparatus structure complexity that this utility model application is adopted, quantity of used parts is many, manufacturing schedule is long, cost is higher, and operation is easy inadequately.

The purpose of this utility model is to design a kind of quick pull unit of hoisting chain of Lever Blocks of novelty.Used number of parts significantly reduces, and is easy and simple to handle, saved and will compress into handwheel and rotate actions such as certain number of degrees.

Now be described in detail as follows in conjunction with Figure of description:

Fig. 1 is the design's a housing construction generalized section;

Fig. 2 is the constructional drawing of this device;

Fig. 3 is the A-A section-drawing of Fig. 2.

In the accompanying drawings: 1 commutation knob, 2 handwheels, 3 major axis, 4 commutation ratchets, 5 chain hoist wheels, 6 splined hole gears, 7 plate gears, 8 hoisting chains, 9 screws, 10 compression springs, 11 drg seats, 12 brake ratchets, 13 friction linings, 14 handles.

The utility model Lever Blocks hoisting chain Quick pulling device, an end of major axis 3 by Brake seat 11, friction plate 13, brake ratchet 12, commutation ratchet 4, handle 14, compression bullet Spring 10, handwheel 2 orders form. Handwheel 2 be left hand thread engagement with major axis 3, commutation ratchet 4 and Major axis 3 is that right-handed thread cooperates, and has two screws 9 to stir protruding on the commutation ratchet 4 on the handwheel 2 Platform. The knob 1 that will commutate pull to " in " position, to rotating counterclockwise handwheel 2, handwheel 2 axially Mobile close to handle 14, the screw that is equivalent to shift fork 9 on the handwheel 2 is stirred on the commutation ratchet 4 Boss, make the also counterclockwise rotation of commutation ratchet 4, because commutation ratchet 4 with major axis 3 is Right-handed thread cooperates, so commutation ratchet 4 moves to handwheel 2 directions, makes commutation ratchet 4 and friction 13 of sheets form the gap, because the effect of Compress Spring 10 keeps this gap, make system realize separating Except on-position. There is Compress Spring 10 to be pressed on the handwheel 2 at major axis 3 afterbodys, when the pulling hoisting-chain Bar 8 the suspension hook limit is arranged the time, chain hoist wheel 5 drives splined hole gears 6 and is rotated counterclockwise splined hole Gear 6 drives plate gear 7 and turns clockwise, and 3 counterclockwise motions of major axis are not if there is compression Spring 10, the commutation ratchet 4 on the major axis 3 will diminish down to compressing, no with the gap of friction plate 13 Can keep the brake off state. Owing to the effect of Compress Spring 10 is arranged, has limited the axle of handwheel 2 To movement, handwheel 2 can not rotated to clockwise direction, the screw 9 on the handwheel 2 is transferred commutation to Boss on the ratchet 4 can not rotate commutation ratchet 4 clockwise, has so just kept The gap that commutation ratchet 4 and friction plate are 13 can not be braked system, finishes counterclockwise The fast action of pulling hoisting chain 8.

If recover on-position, then make the pulling force that pulls hoisting chain reach certain value. Make hand The axial compressive force of 2 pairs of Compress Springs 10 of wheel is greater than the compression stress of Compress Spring 10, and handwheel 2 namely at this moment Can move axially, handwheel 2 just rotates clockwise and outwards moves axially, on the handwheel 2 Screw 9 loses the boss effect of dialling on the ratchet 4 that firmly commutates, and commutation ratchet 4 is also done and turned clockwise And to friction plate 13 near having eliminated gap pressing friction sheet 13, make Braking system, can not the inverse time Pin spurs hoisting chain 8 fast.

This device is according to the different size of Lever Blocks, and the brake-power control of its hoisting chain is at 9.5 kilograms to 10.5 kilograms, and 11.5 kilograms to 12.5 kilograms, in 14 kilograms to the 15 kilograms scopes.

One-way brake effect and brake ratchet owing to brake ratchet 12 when cw pulling hoisting chain (no suspension hook limit) have anti-clockwise to rotate trend with respect to major axis, produce the gap between commutation ratchet and the friction lining in the motion, so can not produce braking mode when cw spurs hoisting chain fast.

After finishing hoisting chain fast pulling make load hook arrive control position fast, commutation knob 1 need only be pulled to " rising " or " decline " position, pull handle 14 and can carry out lifting or other operations.

The quick pull unit structure compared of the utility model and Lever Blocks hoisting chain is in the past simplified, and required part number reduces, and the process-cycle shortens cost and reduces.Easy and simple to handle during use, save handwheel and advanced operations such as rotating a certain predetermined angular, only need the left-hand revolution handwheel to get final product, and control its braking or brake off state by the size that spurs the hoisting chain pulling force fast.

Claims (2)

1, the quick pull unit of a kind of hoisting chain of Lever Blocks, at an end of major axis 3 by drg seat 11, friction lining 13, brake ratchet 12, commutation ratchet 4, handle 14, compression spring 10, handwheel 2 orders are formed, it is characterized in that: handwheel 2 is left hand thread engagement with major axis 3, commutation ratchet 4 cooperates for right-hand screw thread with major axis 3, boss on 9 groups of commutation ratchets 4 of two screws is arranged on the handwheel 2, to rotating counterclockwise handwheel 2, commutation ratchet 4 is left-hand revolution also, make between commutation ratchet 4 and the friction lining 13 and form the gap, because the effect of compression spring 10 keeps this gap to make system realize the brake off state.

2, the quick pull unit of the hoisting chain of Lever Blocks as claimed in claim 1 is characterized in that adopting different compression springs that brake holding load is controlled in 9.5 kilograms to 10.5 kilograms, 11.5 kilograms to 12.5 kilograms, 14 kilograms to the 15 kilograms scopes.