SU894272A1

SU894272A1 - Automatic tensioning apparatus for chain transmissions

Info

Publication number: SU894272A1
Application number: SU802901981A
Authority: SU
Inventors: Степан Андреевич Дубиняк; Игорь Ярославович Хомицкий; Арсен Васильевич Куцевич
Original assignee: Dubinyak Stepan A; Khomitskij Igor Ya; Kutsevich Arsen V
Priority date: 1980-03-31
Filing date: 1980-03-31
Publication date: 1981-12-30

Description

1one

Изобретение относитс к машиностроению и может применено во всех отрасл х народного хоз йства дл нат жени передач с гибкой св зью, преимущественно цепных.The invention relates to mechanical engineering and can be applied in all sectors of the national economy for tensioning transmissions with flexible coupling, mainly chain.

Известно нат жное устройство, содержащее шарнирно-подвижный регулируемый рычаг, на свободном конце которого вращательно-подвижно смонтирована нат жна звездочка р J.A tensioning device is known which contains a pivotally movable adjustable lever, at the free end of which a tensioning star p J is mounted rotationally and movably.

Недостатком такого устройства вл етс невозмоиность его использовани дл автоматической поднастройки передачи по мере износа цепи.The disadvantage of such a device is that it is impossible to use it for automatic adjustment of the transmission as the chain is worn.

Наиболее близким к предлагаемому ,5 изобретению по технической сущности и достигаемому результату вл етс нат жное устройство, содержащее эксцентрично установленный на ос х опор электродвигатель и св занную с ним JQ звездочку .The closest to the proposed, 5 invention to the technical essence and the achieved result is a tension device containing an electric motor eccentrically mounted on the axles of the supports and a JQ asterisk associated with it.

Недостатком дайного устройства тактакже вл етс невозможность использовани его дл автоматической подиастройки передачи в процессе износа (удлинени ) цепи.The disadvantage of the device is also the fact that it cannot be used for automatic transmission adjustment during wear (lengthening) of the chain.

Цель изобретени - осуществление автоматической поднастройки цепной передачи в процессе износа цепи.The purpose of the invention is the implementation of automatic adjustment of the chain transmission in the process of chain wear.

Указанна цель достигаютс тем, что устройство снабжено гайками, закрепленными на корпусе электродвигател фланцами с пазами, в которых установлены гайки с возможностью осевого перемещени и фиксации от проворота , а оси опор взаимодействуют с гайками посредством несамотормоз щёйс резьбы.This goal is achieved by the fact that the device is equipped with nuts fixed to the motor housing by flanges with grooves in which the nuts are installed with the possibility of axial movement and fixation against rotation, and the axes of the supports interact with the nuts through a non-braking system.

Несамотормоз ща с резьба на ос х противолежащих опор выполнена противоположного направлени .A non-braking thread on the axles of the opposing supports is made in the opposite direction.

На фиг. 1 представлено устройство, общий вид1 на фиг. 2 - разрез А-А на фиг. 1.FIG. 1 shows the device, general view1 in FIG. 2 shows section A-A in FIG. one.

Claims

An automatic tensioning device for chain drives contains an electric motor 1, to which flanges 2 and 3 are rigidly fixed with grooves and 5j in which they are mounted with the possibility of axial movement and interacting with the fixed axes 8 and 9 of bearings 10 and 11 by means of non-braking threads. At the same time, the non-braking drive with thread on the axles 8 and 9 of the opposite supports 10 and 11 is performed: in the opposite direction. The motor 1 is associated with an asterisk 12. The device operates as follows. As the chain wears, the reactive torque acting on the electric motor 1 rotates the last by an angle determined by the elongation (wear) of the chain. In this case, the nuts 6 and 7 rotate together with the motor housing and move in the axial direction along a non-braking thread made on the fixed axles 8 and 9 and the thread directions on the axes are opposite. This leads to the fact that the eccentricity of the motor fastening decreases with increasing chain wear according to a certain regularity determined by the profile of the shaped groove and 5 At a certain moment in the outgoing branch S and the tension of $ 2 is determined by the shape of the driven branch de C - the eccentricity of the fastening electric motor; R is the radius of Evezdomka. From the above formula it can be seen that with decreasing eccentricity, the tension of the slave branch Sg increases. An appropriate choice of pro. 4 Phil shaped groove and 5 can provide the required law of change in tension of the driven branch of the transmission depending on the wear chain. The application of the proposed device will provide effective automatic adjustment of the chain transmission during chain wear, which will increase the durability, operability and reliability of chain transmissions. Claim 1. An automatic tensioning device for chain transmissions comprising an electric motor eccentrically mounted on the support axles and an asterisk associated with it, characterized in that, in order to carry out automatic adjustment of the chain transmission during chain wear, it is fitted with nuts attached to the motor housing with flanges with grooves in which the nuts are mounted with the possibility of axial movement and fixation against rotation, and the axles of the supports interact with the nuts by means of non-braking spacing. 2. The device according to claim 1, wherein it is non-locking with the thread on the axles of the opposite supports made in the opposite direction. Sources of information taken into account during the examination 1. N.V. Vorobev. Chain gears. M., Mechanical Engineering, 1968, p. 0, fig. 41

2 .. And Sparrows, I. Belt transfer. M., engineering, 1979. with. 37, fig. 1b (prototype).