SU1582054A1

SU1582054A1 - Self-adjusting ball support of testing device

Info

Publication number: SU1582054A1
Application number: SU884478565A
Authority: SU
Inventors: Андрей Александрович Прохоров; Сергей Александрович Бордаков; Юрий Иванович Кольцун; Николай Александрович Климов
Original assignee: Куйбышевский авиационный институт им.акад.С.П.Королева
Priority date: 1988-08-29
Filing date: 1988-08-29
Publication date: 1990-07-30

Abstract

Изобретение относитс к испытательной технике и может быть использовано при испытании на сжатие образцов материалов. Целью изобретени вл етс повышение точности установки объекта испытани в процессе нагружени . Самоустанавливающа с шарова опора содержит сопр гающиес основные плиты 1 и 2, в осевом отверстии одной из которых размещена дополнительна плита 4. Между дополнительной и основной 2 плитами расположены шарики 5. Фланец 7, установленный на стержне 6, подпружинен пружиной 8 осносительно плиты 4. На втулке 9, жестко соединенной с фланцем 7, выполнен р д сквозных пазов 10, а на ее торце - выступы 11, эквидистантные пазам 12 на торце плиты 4. При нагружении опоры дополнительна плита 4 взаимодействует с плитой 2 посредством шариков 5. По мере роста усили выступы 11 вход т в пазы 12, а за счет осевой деформации втулки 9 ее торец совершает осевой поворот совместно с плитой 4. При этом шарики 5 страгиваютс и трение поко шариков относительно взаимодействующих с ними поверхностей переходит в трение качени , снижа момент углового поворота элементов опоры. 2 ил.The invention relates to a testing technique and can be used in compressive testing of samples of materials. The aim of the invention is to improve the installation accuracy of the test object during the loading process. The self-aligning ball bearing contains mating main plates 1 and 2, in the axial hole of one of which an additional plate 4 is placed. Balls 5 are located between the additional and main 2 plates. The flange 7, mounted on the rod 6, is spring-loaded 8 with respect to the plate 4. On the sleeve 9, which is rigidly connected to the flange 7, has a series of through slots 10, and on its end, protrusions 11, equidistant to the grooves 12 on the end of the plate 4. When the support is loaded, the additional plate 4 interacts with the plate 2 by means of balls 5. As the force increasesthe protrusions 11 enter into the grooves 12, and due to the axial deformation of the sleeve 9, its end makes axial rotation together with the plate 4. In this case, the balls 5 suffer and the friction of the balls' rest relative to the interacting surfaces transforms into rolling friction, reducing the angular rotation moment of the support elements . 2 Il.

Description

Фиг. 2FIG. 2

Claims

Claim

Self-aligning ball bearing of the test device, containing two axisymmetric main mating plates on ball surfaces, in the axial hole of one of which there is an additional plate with a spherical working surface interacting with the opposite main plate by means of balls placed between them, a rod rigidly connected to the additional plate along the axis its surface, and a flange spring-loaded relative to the additional plate, mounted on the rod with the possibility of axial displacement room, characterized in that, in order to improve the accuracy of installation of the test object during loading, the support is equipped with a sleeve rigidly connected to the flange with one end face with protrusions in the form of annular sectors on the free end face, a series of through grooves are made at an angle on the side surface of the sleeve to its generatrix, and on the surface of the additional plate facing the sleeve, grooves are made that are equidistant to the protrusions of the sleeve.

FIG. 2