SU931571A1

SU931571A1 - Strain-gauge incorporative pivot

Info

Publication number: SU931571A1
Application number: SU802961169A
Authority: SU
Inventors: Игорь Яковлевич Березин; Октябрь Афанасьевич Днепровский; Геннадий Васильевич Мазепа; Владимир Викторович Скрягин; Виктор Владимирович Шаповалов
Original assignee: Челябинский Политехнический Институт Им.Ленинского Комсомола
Priority date: 1980-07-15
Filing date: 1980-07-15
Publication date: 1982-05-30

Description

(54) ТЕНЗОМЕТРИЧЕСКИЙ ШАРНИР ГУСЕНИЦЫ(54) TRACK-METER HINGE

1one

Изобретение относитс к транспортному машиностроению, преимущественно к производству и испытани м машин на гусеничном ходу.The invention relates to a transport engineering, primarily to the manufacture and testing of tracked machines.

Известен тензометрический шарнир гусеницы , в котором измерение угловых перемещений производитс с помощью датчика, корпус которого закреплен на траке, а подвижный контакт соединен с пальцем 1.The strain gauge hinge of the caterpillar is known, in which the measurement of the angular displacements is carried out with the help of a sensor, the casing of which is fixed to the track, and the movable contact is connected to the finger 1.

Такое устройство при радиальных смещени х шарнира и действии ударных нагрузок не позвол ет обеспечить достаточную точность измерений.Such a device with radial displacement of the hinge and the action of shock loads does not allow for ensuring sufficient accuracy of measurements.

Известен также тензометрнческий щарнир гусеницы, содержащий размещенный в проушинах смежных звеньев палец, на котором жестко установлено кольцо, и тензоэлементы , одним концом закрепленные в проушинах звеньев и взаимодействующие с упом нутым кольцом 2.Also known is the strain gauge joint of a caterpillar containing a finger placed in the eyes of adjacent links, on which a ring is rigidly mounted, and tenso elements fixed at the links of the links and interacting with said ring 2 at one end.

Указанный шарнир обеспечивает регистрацию радиальных перемещений пальца, но с его помощью невозможно одновременно регистровать угловые перемещени пальцев .This hinge detects the radial movements of the finger, but it cannot simultaneously register the angular movements of the fingers.

Цель изобретени - расширение области применени путем обеспечени одновременной регистрации радиальных и угловых перемещений пальца в щарнире.The purpose of the invention is to expand the field of application by providing simultaneous registration of the radial and angular movements of the finger in the joint.

Указанна цель достигаетс тем, что щарнир снабжен коромыслом, жестко закрепленным на пальце, и взаимодействующими с его концами рычагами с дополнительными тензоэлементами, причем рычаги шарнирно закреплены на смежных звень х, а тензоэлементы , взаимодействующие с кольцом, установлены упруго.This goal is achieved by the fact that the hinge is provided with a rocker rigidly fixed on the finger, and levers interacting with its ends with additional strain elements, the levers being hinged at the adjacent links x, and the strain elements interacting with the ring are set elastically.

Кроме того, ось щарнира креплени каждого из упом нутых рычагов выполнена с винтовым пазом, а каждый их тензоэлемент одним концом закреплен на звене, а другим взаимодействует с упом нутым винтовым пазом.In addition, the axis of the attachment of each of the said arms is made with a screw groove, and each of their strain elements is fixed to the link with one end and the other interacts with the said screw groove.

На фиг. 1 дана схема размещени тензометрических узлов на траке; на фиг. 2 - установка тензоэлементов дл регистрации радиальных перемещений; на фиг. 3 - конструкци тензометрического узла дл регистрации угловых перемещений.FIG. 1 shows the layout of the strain gauge nodes on the track; in fig. 2 - installation of tenso-elements for registration of radial movements; in fig. 3 shows a strain gauge assembly for detecting angular displacements.

Claims

Strain gauge elements 3 are fixed in the erect 1 of the tract 2 to register the radial displacements of the finger, which are pressed to the ring 4 with the free ends. The latter is rigidly fixed to the pin 5 connecting the tracks 2 and 6 of the tracks. On the same finger 5, a rocker arm 7 is installed with two levers 8, the rotation axes 9 of which are placed in each of tracks 2 and 6. The free ends of the strainer elements 10 for detecting the angular displacements are installed in the screw grooves 11 of the axes 9 with the possibility of movement in them. Strain gauge caterpillar works as follows. When a load is applied to the hinge with a rubber-metal elastic sleeve, the rubber layer 12 of the sleeves is deformed, resulting in a displacement of the finger 5 with the ring 4 and the rocker 7 attached to it relative to each of the jointed tracks 2 and 6. The ring 4 moves in the radial direction , bends the strain gauge elements 3, which leads to a change in the load cell. Possible angular displacements of the finger 5 relative to the distance 1 do not affect the readings of the strain elements 3, since their elastic compression to the ring 4 does not interfere with the angular displacement of the contact point along the surface of the ring. At the same time, the rocker arm 7 is displaced, which leads to the rotation of the levers 8 and the axes 9. The rotation of the axes causes 11 free ends of the strain elements to move along the helical grooves. Deformations of strain gauges 3 and 10 lead to a change in the ohmic resistance of the strain gauges 13, which is recorded with the aid of a complex of standard multi-channel strain gauge instrumentation. The technical and economic advantage of the proposed device is that, in contrast to the known ones, it allows for continuous and simultaneous recording of radial and angular displacements of one hinge of the track relative to each of the articulated paths under actual operating conditions. Claim 1. A strain gauge hinge of a caterpillar containing a finger placed in the lugs of adjacent links, on which a ring is rigidly mounted, and tenso-elements, one end fixed in the lugs of the links and interacting with said ring, characterized in simultaneous registration of radial and angular displacements of a finger in a joint; it is equipped with a rocker, rigidly fixed on the finger, and levers interacting with its ends with additional tenzos elements, moreover, the levers are hinged on adjacent links x, and the strain elements interacting with the ring are elastically mounted. 2. The hinge according to claim 1, characterized in that. that the hinge axis of the attachment of each of the said arms is made with a screw groove, and each of their strain elements is fixed at one end to the link, and the other interacts with the said screw groove. Sources of information taken into account in the examination 1.Vasilyev A.V. and Rappoport D.M. Strain gauging and its application in research of tractors. M., Maschgiz, 1963, p. 239-240.

2. USSR author's certificate number 576245, cl. In 62 D 55/20, 1976.