RU138841U1 - PNEUMATIC LIFT - Google Patents

Abstract

1. A pneumatic hoist containing a corrugated elastic shell fixed below on the base and at the top of the loading platform, telescopically articulating sliding cylinders mounted in the inner cavity of the shell, the upper of which is rigidly connected to the loading platform, and the lower to the base, with the cylinders provided with snap rings integrated on the outside of at least several overlying cylinders and interacting with the ends of the underlying cylinders, the working gas supply pipe with shut-off and armature, handle, track rollers, characterized in that the upper cylinder is made with four through holes with a diameter of at least 12 mm, evenly spaced along the diameter of the upper cylinder at a distance of half its height, which ensures free penetration of the working gas into the inner space of the upper cylinder and creates additional pressure on the loading platform. 2. The pneumatic lift according to claim 1, characterized in that, in order to increase the stability of the lift against lateral lateral loads, the ratio of the diameter of the cylinder to its height in the telescopic structure is: 1.0 for the first cylinder: (1.20 ... 1.35 ); for the second cylinder - 1.0: (1.50 ... 1.65); for the third cylinder - 1.0: (2.00 ... 2.15); for the fourth cylinder - 1.0: (2.50 ... 3.10),

Description

The utility model relates to hoisting-and-transport machines, in particular to pneumatic lifting devices, and can be used in garage and other vehicle maintenance facilities.

Known pneumatic lift according to the description of the invention to patent No. 464990, IPC B66F 3/24 publ. 03/25/75 Bull. No. 11, comprising telescopically articulating sliding cylinders mounted on a base plate, in the upper of which there is a piston connected to a loading platform.

The sliding cylinders are provided with retaining rings integrated externally on at least several overlying cylinders and interacting with the ends of the underlying cylinders. The sliding cylinders wear an elastic protective shell that protects the cylinders from contamination and damage, the lower end of which is fixed to the base. The internal cavity of the sliding cylinders is connected via a pipeline to a source of working gas (compressed air).

The pneumatic hoist is equipped with a handle fixed at one end to the base on which the rollers mounted on the opposite side of the handle are mounted.

The disadvantage of this pneumatic lift is its relatively small carrying capacity, due to the fact that the telescopically connected cylinders with a piston integrated in the upper sliding cylinder serve as a power element of the lift (according to the description of the automatic certificate, compressed air is supplied to the inner cylinder cavity).

With an increase in the required lifting height, the number of telescopically articulated cylinders increases the diameter of the upper cylinder, and, accordingly, the area of the piston that is affected by the pressure of the working gas source decreases (provided the transverse dimensions of the jack are maintained), which at a fixed pressure of the source leads to a decrease in the lifting capacity and increase in its metal consumption.

The closest set of essential features to the claimed utility model is the device - Pneumatic lift (RF Patent No. 65880 IPC B66F 3/24 Pneumatic lift / Ginoyan R.V. et al. Applicant and patentee Ginoyan R.V. 2007104805/22. 02/07/2007 Publish. 08/27/2007 Bull. No. 24), containing a corrugated elastic shell fixed on the base and on the loading platform, telescopically articulated cylinders mounted in the inner cavity of the shell, the upper of which is rigidly connected to the loading platform, and lower - with wasps At least one of the overlying inner and outer annular protrusions, wherein at least one of the overlying cylinders is provided with a retaining ring mounted in the upper part of the cylinder to interact with the end face of the underlying cylinder, a working gas supply pipe with shut-off and control valves and a handle mounted on the base, and the working gas supply pipe is in communication with the inner cavity of the corrugated elastic shell through a through hole made in the base To the same handle is hollow for use as a working gas pipeline.

The disadvantage is that the rigid attachment of the upper cylinder to the loading platform reduces the pressure area of the working gas, and therefore reduces the carrying capacity of the device.

The objective of the proposed utility model is to increase the carrying capacity and reduce the metal consumption of the pneumatic lift.

This problem is solved by the fact that the claimed utility model contains a corrugated elastic shell fixed below at the base and at the top of the cargo platform, telescopically articulating sliding cylinders mounted in the inner cavity of the shell, the upper of which is rigidly connected to the cargo platform, and the lower to the base, and the cylinders are provided with retaining rings integrated externally on at least several overlying cylinders and interacting with the ends of the underlying cylinders; gas with shut-off and control valves, a handle, track rollers, and the upper cylinder is made with four through holes with a diameter of at least 12 mm uniformly spaced along the diameter of the upper cylinder at a distance of half its height, which ensures free penetration of the working gas into the inner space of the upper cylinder and creates additional pressure on the cargo platform, in addition, in order to increase the stability of the elevator to the effects of lateral lateral loads, the ratio of the cylinder diameter to of the height of the telescopic structure are as follows:

for the first cylinder - 1.0: (1.20 ... 1.35);

for the second cylinder 1.0: (1.50 ... 1.65);

for the third cylinder - 1.0: (2.00 ... 2.15);

for the fourth cylinder - 1.0: (2.50 ... 3.10).

This design of the pneumatic lift allows you to increase the carrying capacity of the device by 10 ... 25%, depending on the ratio of the area of the annular portion of the inner surface of the cargo platform and the cross-sectional area of the upper cylinder.

The essence of the utility model is illustrated by drawings, where in FIG. 1 is a sectional view of a pneumatic elevator; FIG. 2. shows a remote section of the upper cylinder of the lift.

The solution to this problem becomes possible because the device - a pneumatic hoist contains a corrugated elastic rubber-cord casing 1, fixed by flanges on the base 2 and on the loading platform 3. In the inner cavity of the casing 1 telescopically articulated cylinders 4, 5, 6 and 7 are installed, the upper 7 of which are rigidly connected with the loading platform 3, and the lower 4 - with the base 2.

The cylinders are made with outer projections 8 (except for cylinder 4) and inner 9 (except for cylinder 7) annular protrusions, while cylinder 6 is equipped with a locking ring 10 mounted in the upper part of cylinder 6 with the possibility of interaction with the end face of the underlying cylinder 5, in addition the upper cylinder 7 is made with four through holes 14 with a diameter of at least 12 mm (see FIG. 2) uniformly spaced along the diameter of the upper cylinder 7 at a distance of half its height, which ensures free penetration of the working gas into morning space of the upper cylinder 7 and creates an additional pressure on the loading platform 3,

The combination of pressures on the area of the annular section of the inner surface of the cargo platform 3 and on the part of the area of the cargo platform 3 under the cross section of the upper cylinder 7 allows to increase the load capacity of the device by 10 ... 25%, and to increase the stability of the lift to the effects of lateral transverse loads of the ratio of the diameter of the cylinder to its height in telescopic construction are:

for the first cylinder - 1.0: (1.20 ... 1.35);

for the second cylinder 1.0: (1.50 ... 1.65);

for the third cylinder - 1.0: (2.00 ... 2.15);

for the fourth cylinder - 1.0: (2.50 ... 3.10).

The internal cavity of the corrugated elastic shell 1 is in communication with the pipeline 11 through a through hole 12 made in the base 2 and shut-off and control valves, including, for example, a pressure gauge, a three-way valve (not shown), through which the working gas is supplied. The pipeline 11 for supplying working gas is combined with a handle fixed on the base 2 and made hollow (see Fig. 1). The lift is also equipped with rollers 13. mounted on the base 2 opposite the handle - the pipe 11.

Pneumatic hoist GPU-1 operates as follows.

The lift for the handle 11 is rolled up using rollers 13 to the place of lifting of the load, for example, a car and lowered to the ground or flooring. Compressed air is supplied at a pressure of 0.5 ... 0.7 MPa through the handle - pipe 11 into the inner cavity of the corrugated elastic shell 1, while the working gas fills the shell 1 and creates pressure on the area of the annular section of the cargo platform 3 and through the openings 14 of the upper cylinder 7 fills the inner space of the upper cylinder 7 and creates additional pressure on that part of the area of the loading platform 3, equal to the cross-sectional area of the upper cylinder 7 of the telescopically articulated cylinders.

When moving up the cargo platform 3, the upper cylinder 7 is first extended, and then, through the interaction of the outer 8 and the inner 9 ring protrusions, the cylinders 6 and 5 are advanced (cylinder 4 is rigidly fixed to the base 2).

After lifting the load, the crane located on the handle - pipe 11 is closed and the load is fixed at a given height. An extended telescopic structure consisting of four cylinders 4, 5, 6 and 7, made in accordance with the accepted ratios of the diameter of the cylinder to its height:

for the first cylinder - 1.0: (1.20 ... 1.35);

for the second cylinder - 1.0: (1.50 ... 1.65);

for the third cylinder - 1.0: (2.00 ... 2.15);

for the fourth cylinder - 1.0: (2.50 ... 3.10),

provides stability of the elevator to influence of lateral lateral loads.

At the end of the repair work, the crane installed on the handle - the pipe 11 is opened, air is drained from the inner cavity of the shell 1 into the atmosphere, and the load is lowered to its original position.

Thus, the proposed utility model, combining the simplicity and reliability of the structure, provides an increase in the efficiency of the device by increasing the carrying capacity and reducing the metal consumption of the structure.

Claims (2)

1. A pneumatic hoist containing a corrugated elastic shell fixed below on the base and at the top of the loading platform, telescopically articulating sliding cylinders mounted in the inner cavity of the shell, the upper of which is rigidly connected to the loading platform, and the lower to the base, with the cylinders provided with snap rings integrated on the outside of at least several overlying cylinders and interacting with the ends of the underlying cylinders, the working gas supply pipe with shut-off and armature, handle, track rollers, characterized in that the upper cylinder is made with four through holes with a diameter of at least 12 mm, evenly spaced along the diameter of the upper cylinder at a distance of half its height, which ensures free penetration of the working gas into the inner space of the upper cylinder and creates additional pressure on the loading platform. 2. The pneumatic lift according to claim 1, characterized in that in order to increase the stability of the lift to the effects of lateral lateral loads, the ratio of the diameter of the cylinder to its height in a telescopic structure is: for the first cylinder - 1.0: (1.20 ... 1.35); for the second cylinder - 1.0: (1.50 ... 1.65); for the third cylinder - 1.0: (2.00 ... 2.15); for the fourth cylinder - 1.0: (2.50 ... 3.10),

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