SU1164478A1 - Joint of steel shafts with plastic sheathing - Google Patents

Description

The invention relates to compounds of long thin steel shafts' with plastic lining, intended primarily for the transmission of torques of average magnitude.

The proposed connection is intended for reversing work and can be used for working in a liquid medium in chemical and electrochemical surface treatment plants.

Known rigid joints of long thin shafts, for example, often found in textile machines, include sleeve sleeves with pins, longitudinally-collapsed couplings, -finger couplings, cam couplings, cross-fold couplings, cam-cam couplings, face couplings, and gear couplings (V.S. Polyakov, I.D. Barbash, O.A. Ryakhovsky. Coupling reference book. L., "Mashinostroenie ' ¹ , - 1974, pp.5-28, fig.1).

The use of Known rigid compounds in liquid, especially aggressive, environments with small dimensions is impossible or difficult for the following reasons. In the case of sleeve couplings with pins on the front side, bushings, safety pins or prismatic keys must be welded to seal the internal cavity of the coupling. The dismantling of the shafts, for example, when replacing bearings, causes the destruction of a rigid joint or shafts with plastic sheeting. The use of longitudinally-collapsed couplings is impossible as a result of the necessary threaded connections, since the stresses arising from the temperature effect cause the relaxation of the threaded connections. The same occurs in the case of using the finger; cross-folding couplings and couplings with end teeth. Axial fixation of the latter, as well as cam, cam-disk and gear couplings is not provided. If for constructive reasons the bearings of the shafts to be connected must be located in the same cage, it is impossible to apply the known rigid joints in view of. their large size.

The invention is based on the task of creating a compound of long

thin shafts with plastic casing - for transmitting reversible torsional moments of medium size with small dimensions, with the sub5 hanger and coupling placed in one. clip The compound is applicable in liquid, especially in aggressive environments.

According to the invention, the connection of steel shafts with plastic lining, mainly long thin shafts, containing two shafts interconnected by a ferrule, is equipped with two bearings fixed by retaining rings, each of which is installed between the corresponding shaft and the ferrule and mounted in shaped grooves plastic connecting element

2 ° with a coefficient of linear expansion equal to or less than the coefficient of linear expansion of the material of the shaft, with a width of the middle part equal to 0.25-0.3 shaft diameter, height

²³ 0.6 shaft diameter and width of the end sections, 1.5-2 times the width of the middle part, with the lateral faces of the end sections of the connecting element can be placed at an angle of 50 ° to one another, and the bearings are made in the form of sliding bearings made of plastic materials or in the form of radial rolling bearings with end

35 seals.

The design of the grooves, as well as the connecting elements, simultaneously represents the radial fixation of the connecting elements connecting shafts. Axial fixation of the shafts radially fixed by the connecting elements is carried out by bearings placed in the cage, which on both sides of the inner

45 and the outer ring are fixed with retaining rings made of plastic materials. When using the coupling in liquid media, it is most advantageous to use plastic pod50 slipthorn, and in ordinary

environments due to high humidity - radial ball bearings with o-rings. Thanks to the invention, a connection was created between long thin shafts and a layer

mass plating intended

to transfer reverse medium

torques at small dimensions3

1 164478

four

in the modes of temperature fluctuations of aggressive media, which can be used in the known systems with the lowest costs for the manufacture, installation and dismantling, in 5 different technological processes of electrochemical or chemical surface treatment.

FIG. 1 shows a device sectional using podship- ¹⁰ sliding nicks; in fig. 2 - the same, when using radial rolling bearings with sealing rings; in fig. 3 is a sectional view of FIG. 1, (an embodiment of the execution of the X-shaped pa- 15 for); in fig. 4 is the same, the embodiment of the groove in the shape of an I-beam.

The device contains two long thin shaft 1 with plastic lining, connecting element 2, sub- 20 sliding spine 4, fixed axially with retaining rings 3, or radial rolling bearings 6 with sealing rings 7 and extending shafts to 25.

The transmission of torque is carried out by means of a connecting element 9 installed in the X-shaped grooves of the shafts 8, or after

It is possible to radially expand and, through the axial clearance in the grooves of the shafts, the possibility of axial expansion, so that there is no negative effect on device performance Radial fixation of the connecting elements 9 and 11 is provided by their shape. Axial fixation of the shafts 1 is carried out by means of both bearings arranged separately in the holder 5, which are fixed in turn with retaining rings 3. The shunting of the shafts is made in the form of floating bearings.

When dismounting the locking rings 3 and sliding bearings 4 or radial rolling bearings 6 and sealing rings 7, the device can be removed without destruction. Depicted in figure 1 and 2 technical solutions with appropriate use of materials can be used in liquid media.

1164478

Claims (3)

1. CONNECTION OF STEEL BA, L0V WITH PLASTIC COVERING, mainly long thin shafts, containing two shafts interconnected by a yoke, differing in the fact that it is equipped with two bearings fixed by retaining rings, each of which is mounted between the respective shaft and the clip, and installed in figured shafts performed on the ends of the shafts> pa4 Zah plastic connecting element with a coefficient of linear expansion equal to or less than the linear expansion coefficient of the material of the shaft, with a width of the middle part, equal to 0.25-0.3 shaft diameter, height 0.6 shaft diameter with a width of end sections, 1.5 -2 times the width of the middle part, with the leg edges of the end sections of the connecting element can be located at an angle of 50 * to one another. 2. The compound according to claim 1, which is based on the fact that the bearings are made in the form of sliding bearings from plastic materials. 3. Connection to claim 1, characterized in that the bearings are made in the form of radial rolling bearings with mechanical seals. Thebes 1 1164478 A 1 1164478 2