SU1214573A1 - Hoisting mechanism - Google Patents

Description

I -1

The invention relates to a lifting mechanism for electric and forklift trucks, loading machines, tractors with lifting devices and other lifting and transport machines.

A lifting mechanism for loaders is known (see England patent No. 1396715, CL V8H, 1975.), consisting of a fixed mast, in which a movable mast is mounted. With a movable mast, a lifting carriage is movably mounted by means of flexible carriers, a passage dich through movable mast rollers and fixedly connected with its other end to a fixed mast. On the side of the profiles of the fixed and movable masts, two hydraulic lifting devices are mounted, connected to the masts. The fixed and movable masts are made in the form of a closed frame structure.

The main disadvantage of the known solution is the reduction of the driver's visual field. following the lifting mechanism, due to the increased width of the combination of guide profiles and hydraulic lifting devices and the presence of transverse beams connecting the profiles of the fixed and movable masts. A large number of components, such as hydraulic cylinders, profiles, cross beams, complicates the layout of the lifting mechanism, the connection of the elements to one another and leads to an increase in the own weight of the structure.

The aim of the invention is to provide a lifting mechanism with an increased field of view of the driver of the machine and a simplified arrangement.

The goal is achieved with the aid of the following: a lifting mechanism, whose motionless mast: is filled in the shape of a frame, opened; - to that E upper end, formed from the guide profiles and the transverse beams connecting them in their lower end. The guide profiles are designed so that at the same time they are bodies of hydraulic lifting devices. and one of the transverse beams, connecting the profiles, is a pipeline through which fluid is supplied for hydraulic lifting devices. The working bodies of the lifting devices are connected to their

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upper part. with the upper part of the movable mast. Last made in the form of a frame, open bottom. The movable and fixed masts contain external guide elements at their 5 open ends. The guiding profiles of the fixed mast have a cross section that combines one annular part with another, having the shape of U, with the annular part located on the outer side and the profile.

The invention provides for an increase in the field of vision of the driver of the vehicle. a hoist mechanism due to the combination of the fixed mast guide profiles with hydraulic lifting devices; reducing the number of components of the masts;

20 reduction in weight of the installation.

Figure 1 shows the lifting mechanism, rear view, in a perspective view; figure 2 - section of the N-N in figure 1; on

25 FIG. 3 — lower part of the lifting mechanism, front view, in axonometric view; figure 4 - section KK in figure 3; Fig. 5 is a diagram of the lifting mechanism, showing the field of view B of the driver

- „machines through a lifting installation; Figures 6 and 7 are cross sections of the guide profiles of the fixed mast.

The lifting mechanism consists of a lifting trolley 1, chains 2, a fixed mast 3 and a movable mast 4.

The stationary mast 3 is composed of two guide profiles 5, which are bodies 24 of hydraulic lifting devices, and transverse beams 7 and 8 connecting guide profiles 5 in their lower part. The cross section of the guide profiles 5 is formed from one annular part 10, which is located on the outside of the i-shaped part 11. In the housings 24 of both guide profiles 5, the working members of the hydraulic lifting devices are mounted. Hydraulic lifting devices are connected to pipeline 9, through which fluid is supplied under pressure, by means of a transverse beam 7, made in the form of a pipe.

The mobile mast 4 consists of two profiles 12, which are connected in

 its top with a beam 13. Under vizna. the mast 4 is connected with the working bodies 6 through the bearing elements 20,

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40

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5 a

The guide profiles 5 of the fixed mast 3 are provided in their upper part with rollers 14 acting in the direction C, and rollers 15 for the lateral direction, acting in the directions Hell and AB, and guide elements 16, acting in the directions В a and Bb,

The profiles 12 of the movable mast 4 are provided in their lower part with rollers 17, acting in direction C, rollers 18 for lateral direction, acting in directions of & q and b, and guiding elements 19, acting in directions of Yes and Аb.

Chains 2 are connected at one end to a lifting carriage 1 by means of mounting elements 21, and the other to a fixed mast 3 by means of mounting elements 22 passing through rollers 23, which are mounted on bearings on trunnions fixed in the upper end of movable mast 4.

The field of view In the driver of the car through the lifting mechanism is limited

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along the height of the upper beam 13 connecting the profiles of the movable mast 4 and the transverse beam 7 in the lower part of the fixed mast 3. The width of the floor

5 Views 6 are limited by the combination of profiles 12 of the movable mast 4 and the guide profiles 5 of the fixed mast 3.

The lifting system works as follows.

When fluid is supplied under pressure through the pipeline 9 and the transverse beam 7, it enters the housings 24 of the hydraulic 15 lifting devices of the guide profiles 5 of the fixed mast 3, as a result of which the working members 6 are raised, and with them the movable mast 4. When raised

20, the movable mast 4 lifts the rollers 23, and the chains 2 raise the lifting carriage 1.

Recognized as an invention according to the results of the examination carried out by the Office for the Invention of the People's Republic of Bulgaria.

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Editor I.Rybchenko Tehred M.Parotsay

Order 842/29 Circulation 800 Subscription

VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

Branch PPP Patent, Uzhgorod, Proektna St., 4

FIG. 7

Proofreader O.Lugov

Claims (2)

1. LIFTING MECHANISM, consisting of a fixed mast and a movable mast, on which a lifting trolley is mounted movably, connected to flexible load-bearing elements passing through the rollers of the moving mast and fixedly connected at the other end to the fixed mast, and two hydraulic lifting devices, each of which is connected respectively, with a fixed and movable mast, characterized in that the fixed mast 3 is made in the form of an open frame at its upper end, formed from guide profiles 5, which are and are housed with 24 hydraulic lifting devices and transverse beams 7 and 8 connecting the guide profiles 5 in their lower part, one of which is made in the form of a pipe 9 for supplying fluid for hydraulic lifting devices, whose working bodies 6 are connected with their upper ends to the upper part of the movable mast 4, made in the form of an open bottom frame, and the fixed 3 and movable 4 masts have corresponding guiding elements 16 and 19 at their open ends, covering the profiles of the stationary mast from the outside s 3 and 4, the movable mast. 2. The mechanism according to claim 1, characterized in that the guide profiles 5 of the fixed mast 3 have a section in which one annular 10 and one U-shaped part 11 are paired, and the annular part 10 is located on the outside of the ΰ-shaped part 11. 1 · 12