RU2800781C1 - Telescopic pneumatic jack - Google Patents

Abstract

FIELD: lifting mechanisms.

SUBSTANCE: design of the upper part allows the use of interchangeable devices for various kinds of work. The bottom part has a non-slip surface.

EFFECT: increased reliability in operation and service life.

1 cl, 2 dwg

Description

The invention relates to the field of engineering, where mechanisms are used for lifting heavy loads to a small height for repair and maintenance, for example, for use as a car jack, as well as for moving heavy loads over a short distance.

Known having different designs, hydraulic, pneumatic and mechanical jacks, which are equipped with vehicles (TC) used when changing the wheel and inspecting the bottom of the vehicle, but they are all quite bulky and require significant physical exertion from the staff.

The closest technical solution to the claimed telescopic pneumatic jack (TPD) is the "Universal pneumatic jack" (patent No. 2759811), but it has significant requirements for structural strength and wear resistance of the shell material.

The objective of this invention is to increase the reliability of the pneumatic jack and ease of use.

This problem is solved in TPD, in which the working volume (VW) enclosed in a shell consisting of 2 parts (strength and sealing) is placed instead of a spring in the total cavity of series-connected hollow cylinders forming a rigid telescopic structure. The edges of the side surfaces of the cylinders are provided with protrusions in the form of rings, which can be of different configurations, in the upper part of the cylinders from the inside, and in their lower part - from the outside, which provide adhesion between adjacent cylinders. The number and diameter of the cylinders is selected based on the provision of the required lifting height and the weight of the transported cargo with sufficient rigidity of the TPD structure for this. With sufficient strength of the side surfaces of the cylinders, only the sealing part of the shell is used, since. the need to use the strength part of the shell is eliminated. To reduce friction, the side surfaces of the cylinders and the free edges of the rings have a high class of surface finish, and the free edges of the rings can be equipped with seals, which can be of various designs. If the design of the seals and the material of their filling provide the required long-term tightness, then the sealing shell is not used, and the TPD can work with any working agent. In order to return the jack structure to its original position at the end of work, compression springs can be installed in the gaps between adjacent side surfaces, the value of which should be slightly larger than the diameter of the spring bar. The rigid upper base is equipped with a device capable of working with interchangeable devices for performing various types of work on moving heavy loads, and the lower one is equipped with a surface that excludes slipping. TPD has a valve similar to the valve installed on vehicle tires, to which, at the time of its use, a compressor is connected, which serves to pump the working agent into the tire cavity to the required working pressure, and a device for its release at the end of the work. To ensure the required working stroke of the jack, the design may consist of several series-connected RO, having a common base in the narrow or wide part of the TPD.

The graphic images show the principle of operation of the jack, which shows a TPD containing five hollow cylinders 2, equipped with rings 1, while in Fig. 1 - TPD, in which the RO is under the maximum possible working pressure, and in FIG. 2 - TPD in the maximum folded state. Seals and springs, the designs of which can be diverse, as well as the valve and outlet device, are not shown in the figures, since the latter can be installed in any place convenient for the manufacturer and consumers.

TPD works as follows. A compressor is connected to the valve, designed to inflate vehicle tires, and a working agent is supplied to the RO until the required stroke of the jack is reached. Upon completion of the required work, the working agent exits through the outlet device, which is put into operation, and the TPD takes the form shown in Fig. 2.

Claims (1)

A telescopic pneumatic jack (TPD), in which the working volume (RO) filled with a working agent, is enclosed in a shell placed inside a conical tension spring equipped with bases, a rigid upper base is equipped with a device for installing interchangeable devices, the shell wall can consist of two parts, one of which provides the necessary strength, and the other provides tightness, and the jack is equipped with a valve and a mechanism for releasing the working agent from the RO, characterized in that the TPD does not have an inner shell, and the RO is enclosed in a cavity forming a rigid telescopic structure, which consists of series-connected they are hollow cylinders, the edges of which are provided with protrusions in the form of rings in the upper part of the cylinders from the inside, and in the lower part - from the outside, which provide adhesion between adjacent cylinders, and the tightness of the RO at the TPD is ensured by seals installed on the edges of the annular protrusions at the ends of the cylinders, and can be provided with compression springs in the gaps between adjacent side surfaces, while the design can consist of several ROs connected in series, in which the edges of the hollow cylinders have a common base in a narrow or wide part.

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