SU1237624A1 - Loader hoist - Google Patents

Description

The invention relates to lifting and transport machinery, more specifically to forklifts with a large free lifting height, having an improved visibility achieved by the release of internal space, and can be used in the design of electric and forklift trucks, processing cargo inside railway cars of iconteyneri,

The purpose of the invention is to increase reliability, simplify management and improve visibility.

FIG. 1 shows a general view of a forklift with a forklift, side view in FIG. 2 - a view from the driver’s seat on the forklift at the lower position of the carriage; on fig.Z - one of the additional cylinders | in fig. 4 is a view from the driver’s seat on a forklift at the top position of the carriage; FIG. 5 - view from the driver's seat on the forklift with the raising of the inner frame and the upper position of the carriage.

The forklift truck 1 of the forklift includes an external fixed frame 2, an internal movable frame 3 moving along it, a carriage 4 fitted with forks 5 and moving along the mobile frame 3 fixed on the lower part of the stationary frame a centrally located unilateral one with a rod 7 bearing blocks 8 in contact with flexible elements 9 connecting the movable frame 3 and the fixed frame 2. Two pistons are installed on the sides of the fixed frame 2 to provide a lifting drive for the carriage 4; x cylinder 10 unilateral action with rods 11 carrying blocks 12, in contact with other flexible elements 13, interacting with blocks 14 mounted on top link 15 of movably frame 3. These flexible elements 13, made in the form of plate chains, are fixed by one their ends to the cargo carriage 4, and others to the brackets 16 installed on the outside of the frame 2. The flexible elements 9, made in the form of plate chains, are fixed by their ends alone on the lower link 17 of the movable edge 3, by others - on the link 18 motionless frames 2 about

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Cylinder 6 can be either piston or plunger type. Single-acting piston cylinders 10 comprise a sleeve 19, a piston 20 with a rod 11, a seal housing 21, seals 22 and 23. The rod cavity 24 is working fluid, the working fluid is fed into it through the opening 25.

The working area of the rod end 24 of cylinder 10 is 4 times smaller than the area of the piston (or plunger, if the cylinder is plunger) of cylinder 6. The working fluid to cylinder 6 and to cylinders 10 is supplied through a rigid pipeline S.

The device works as follows.

From the initial position shown in FIG. 2, while simultaneously pumping the working fluid into the working (rodless) cavity of the cylinder 6 and into the working (rod) cavities of the cylinders 10, the movement of the piston 20 and the rods 11 of the cylinders 10 (determined by the ratio of working areas and loads. The rods 11 of the cylinders 10 bearing the blocks 12, with the help of flexible elements 13, lift the carriage 4 to the extreme upper position relative to the movable frame 3 (see Fig. 4), and the rods 11 are drawn into the cylinders 10. With further pumping of the working fluid into the working (stringless) cylinder cavity 6 and in p The barrel (rod) cavities of the cylinders 10 will receive a piston rod (plunger) 7 of the cylinder 6 with blocks 8 mounted on us, carrying out using flexible elements 9 lifting of the movable frame 3 together with blocks 14 mounted on it, contacting with flexible elements 13, pulling the rods 11 of the cylinders 10. The working fluid from the rod cavities of the cylinders 10 flows into the rodless cavity of the cylinder 6, ensuring a constant lifting speed of the hareget 4 relative to the fixed frame 2. The lifting of the carriage 4 and the movable frame 3 will take place until until cylinders 6 and cylinders 10 exhaust their stroke (see FIG. five). The lowering of the movable frame 3 and the carriage 4 occurs when the supply of working fluid is disconnected under the action of the weight of the load in the reverse order.

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FIG. five

Editor A.Dolinich

Compiled by V. Momot

Tehred L.Oleynik Proofreader E.Roshko

3254/27

. Circulation 799 Subscription

VNIIPI USSR State Committee

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

Production and printing company, Uzhgorod, st. Project, 4

Claims (1)

A LOADER LOADER containing a fixed frame mounted on it with the possibility of moving a movable frame, mounted on the latter with the ability to move the carriage and blocks on the upper part of the moving frame, which is fixed by other blocks, • enveloped by flexible elements connecting the fixed frame with the movable 'characterized in that, in order to increase reliability, simplify control and improve visibility, the specified cylinder is made single-acting with a rodless working cavity, and on the side two additional single-acting power cylinders with rod working cavities are fixed to the torons of the fixed frame., on the rods of which additional blocks are mounted, enveloped by additional flexible elements connecting the fixed frame with the carriage and also enveloping these blocks, while the working area of the rodless cavity of the cylinder refers to the sum of the working area SU ... 1237624