RU1798291C - Jack - Google Patents

Abstract

Appointment: for lifting loads. SUMMARY OF THE INVENTION: a jack comprises two rods 1 of material with thermomechanical shape memory. On the rods 1 are fixed electric heaters 2 with insulating casings 3. The casings are each made up of a disk 5 and a glass 3, movable relative to the heater, interacting with a stepped support 7. 2 il.

Description

FIELD OF THE INVENTION This invention relates to hoisting machines, in particular to jacks using material with thermomechanical shape memory.

The purpose of the invention is to increase productivity.

In FIG. 1 shows a jack, general view: in FIG. 2 is a view A in FIG. 1.

 The jack comprises parallel rods 1 of material with thermomechanical shape memory. Electric heaters 2 with ring-shaped electrical insulating cups 3 fixed by pins 4 are fixed on the rods. Thermal insulating discs 5 are fixed on the upper part of the rods 1, and thermal insulating cups 6 are movable relative to electric heaters. Step supports 7 interact with the ends of the rods. Other ends of the rods are rigidly connected by an insulating element 8.

The jack works as follows.

To lift the load, one of the rods 1 of the jack is heated. In a rod made of an alloy having a shape memory property, an increase in temperature results in a martensitic transition of the alloy from one form to another, as a result of which the rod lengthens and lifts the load. When the rod is lengthened, another rod rises, under which the first step of the support 7 is installed in the formed gap. The step height is equal to the rod elongation. The heat is turned off and the first rod takes its original shape. After that, the weight of the load to be lifted is transferred to another rod, under which the support 7 is placed. The heating of the other rod is turned on and it lengthens, lifting the load. Then put another stepped support under the first rod, while supporting the insulating glass 6. After installing the support, 7 glass

supported by one of a stepped support. They turn on the heating of another rod and turn on the heating of the first rod, which lengthens and raises the load even higher. Under

another rod in the gap formed again, advance the support 7, etc.

As you rise, the free space between the unloaded rod and the foundation increases, in which you can

lower the insulating cup 6 for faster cooling of the stem. This accelerates the process of lifting the load.

The load can be lifted to any desired height, since the heaters 2 are fixed to the rods and move with them as they rise, the height of the stepped supports depends on the required lift height.

twenty

Claims (1)

The claims A jack containing two parallel-mounted rods made of material with thermomechanical shape memory, vertically stepped supports, electric heaters mounted on rods, equipped with thermo- and electrically insulating casings enclosing them, having openings in the upper and lower parts for each of the rod ends being rigidly connected to each other by the upper ends by means of a thermoelectric insulating element and interacting with the other ends with the aforementioned support, in order to increase productivity, the thermo- and electrical insulating rods of the rods are each made up of a disk fixed in the upper part of the stem, and the glass movable relative to the electric heater and interacting with a stepped support. Type A Figure 2