SU796962A1 - Current-collecting device - Google Patents

Description

(54) CURRENT DEVICE

one

The invention relates to electrical engineering, in particular, to devices for transmitting electrical current from a stationary object to a rotating one.

A collector device is known that contains a contact holder made of two parts, one of which contains a sliding contact, and the parts are connected by a flexible conductive element, such as a package of copper foil, a spring, an insulator, a strip, a conductor, and a current-collecting part. Til The disadvantage of this design is small service life and unreliability of contact, since sliding contact, when interacting with a current-receiving part, creates sliding friction, and therefore there is an increased wear of the contacting silver (gold-plated x) surfaces, which leads to unreliable contacts.

It is also known a device comprising concentrically arranged two rigid rings, an elastic conductive ring placed between them, rolling bodies mounted with a tension between the elastic and one of the rigid rings, a corrugated conductive tape placed between the elastic and another rigid ring, provided with restrictive steps. with a gap in the corrugations of the tape 2.

The disadvantage of this design is the unreliability of work and small

5 device service life, since during the transfer of energy (current collection) the device has four pairs of movable contacts (internal rigid ring rolling body; rolling body - elastic RING; elastic ring - corrugated tape; corrugated tape - external rigid ring). In addition, during their movement, the rolling bodies may unfold within the gap between them and the inner walls of the device, which leads to rolling jams (instead of rolling movements, a sliding movement appears), which also due to the large wear of contacting (silver or gold) a) surfaces leads to unreliable contact.

Claims (3)

It is also known a collector device containing contact rings of fixed and rotating current-carrying links, between which are installed rolling contacts, made in the form of two bodies, freely us 30 on a common axis of the GB. The disadvantage of this design is the short life and unreliable operation of the device, since the structure of the device is such that it does not ensure contact along the surface line of the cones with the grooves of the contact rings because the parts in the device are manufactured and installed relative to each other. to a friend with certain maximum deviations (tolerances) from nominal both in linear and angular dimensions, including eccentricities and misalignments during installation, and this causes one of the cones (one contact Achen) is in contact with the contact ring at a point located at the base of the cone and the other cone - the contact at a point closer to the top, i.e. points of contact are at different diameters. And since the gear ratio depends on the ratio of the diameters of the interacting wheels, one of the cones instead of the rolling contact has a slip contact, which leads to wear of the contacting (silver or gilded) surfaces, and, consequently, unreliable contact. In addition, the installation of pins with the possibility of axial movement (without radial gaps) does not allow the cones to move in an angle to each other, which is necessary when working the device. This leads to the inoperability of the structure, so it is possible to install the pins only with radial clearances, which are selected in one direction and one cone is ahead of the other in motion by the amount of radial play, which, in turn, leads to a reversal (jamming) of rolling contact in the whole and, as a result, to the wear of the contacting surfaces and to the unreliability of the operation of the device. The purpose of the invention is to increase the reliability of the device and increase its service life. This goal is achieved by the fact that the rolling contacts are made in the form of hemispheres, which are mounted on the base axis to each other and are connected between each other by an additionally introduced elastic element. The drawing shows schematically a current collection device, a section. The collector device contains concentrically located fixed 1 and rotating 2 contact rings and 3 rolling contacts made between them with voltage, made in the form of two hemispheres 4, sitting in pairs freely on axis 5 and fixed in separator 6. In this case, hemispheres 4 are pairwise connected between themselves elastic element 7, rubber (glued or vulcanized). The operation of the device is as follows. When the slip ring 2 rotates, the rolling contacts 3, which are installed with a voltage between the rings 1 and 2, rotate without sliding. The transfer (current collection) of energy from the ring 2 to the ring 1 occurs through the rolling contacts 3, and the reliability of the contact is ensured by the elastic forces of the elastic element 7. The proposed design is more durable and reliable in operation, since the rolling contacts made of two hemispheres rotate between the contact rings non-slip, which eliminates the rapid deterioration of the contacting surfaces and, therefore, increases the reliability of the contact (tOKO-conductive coating is not damaged). And the elastic element allows the hemispheres of the rolling contact to elastically rotate the bases towards each other, which is necessary when the device is working, and does not allow the hemispheres to move relative to each other in the direction along their bases, which prevents the rolling contacts from developing, and therefore the wear of the conductive coating contacting surfaces. Claims: Current collector device containing contact rings of fixed and rotating current-carrying links, between which rolling contacts are made, made in the form of two bodies, freely mounted on a common axis, characterized in that, in order to increase reliability and increase service life, the rolling contacts are made hemispheres, which are mounted on an axis with the base to each other and interconnected by an additionally introduced elastic element. Sources of information taken into account during the examination 1. USSR author's certificate 502432, cl. H 01 R 39/00, 1976. 2. Authors certificate of USSR 485518, cl. H 01 R 39/28, 1976. 3. Authors certificate of the USSR 473252, cl. H 01 R 39/02, 1975. J