SU711344A1

SU711344A1 - Lever-type transmitting-multiplying transducer of rectilinear travel

Info

Publication number: SU711344A1
Application number: SU782644846A
Authority: SU
Inventors: Павел Федорович Ященко
Original assignee: Предприятие П/Я В-2190
Priority date: 1978-07-17
Filing date: 1978-07-17
Publication date: 1980-01-25

Description

Изобретение относится к машиностроению и может быть использовано в измерительных, управляющих и регулирующих устройствах.The invention relates to mechanical engineering and can be used in measuring, controlling and regulating devices.

Известен рычажно-множительный преобразователь прямолинейных движений,, содержащий двуплечий рычаг, плечи которого контактируют непосредственно с звеньями прямолинейного движения [11. ^υ Known lever-multiplier Converter rectilinear movements, containing a two-arm lever, the shoulders of which are in direct contact with the links of rectilinear motion [11. ^υ

Однако поворот рычага сопровождается скольжением его плеч по контактным поверхностям ведущего и ведомого звеньев прямолинейного движения и изменением точек контакта на этих по-‘^ верхностях, вследствие чего значительно Снижается точность преобразователя. Наиболее близким техническим ре- _ шением к изобретению является рычажный передаточно-множительный преобразователь прямолинейных движений, содержащий установленный на шарнирной опоре двуплечий рычаг, два што- тс ка, расположенные в направляющих с возможностью перемещения йдоль них и под одинаковыми·углами к плечам рычага, и два шатуна, шарнирно связывающие концы плеч рычага со што- __лками [2] . - ’ОHowever, the rotation of the lever is accompanied by the sliding of its shoulders along the contact surfaces of the driving and driven units of the rectilinear movement and by the change of the contact points on these surfaces, as a result of which the accuracy of the converter is significantly reduced. The closest technical solution to the invention is a lever transmission-multiplying transducer of rectilinear movements, comprising a two-shoulder lever mounted on a hinged support, two pieces, located in the rails with the ability to move along them and at equal angles to the shoulders of the lever, and two connecting rods pivotally connecting the ends of the lever arms with shto- _ _l kami [2]. - 'ABOUT

Однако известный преобразователь имеет нелинейную характеристику, вследствие чего при большом передаточном отношении появляется значительная погрешность преобразователя.However, the known converter has a non-linear characteristic, as a result of which, with a large gear ratio, a significant error of the converter appears.

Целью изобретения является получение линейной характеристики преобразователя.The aim of the invention is to obtain a linear characteristic of the Converter.

Это достигается тем, что отношение длин шатунов равно отношению длин соответствующих плеч рычага от точки его опоры до точки установки каждого шатуна.This is achieved by the fact that the ratio of the lengths of the connecting rods is equal to the ratio of the lengths of the corresponding arm shoulders from the point of its support to the installation point of each connecting rod.

На фиг. 1 представлена принципиальная схема преобразователя; на фиг. 2 - расчетная схема.In FIG. 1 is a schematic diagram of a converter; in FIG. 2 - design scheme.

Преобразователь содержит двуплечий рычаг 1, который установлен на неподвижной опоре 2. С концами плеч рычага 1 с помощью шатунов 3 и 4 шарнирно связаны подвижные штоки 5 и 6, установленные в направляющих 7 и 8. Причем по отношению к точке опоры штоки установлены на расстоянии R. и г , равных длинам плеч рычага 1, И; расположены к плечам рычага под одинаковыми углами, а шатуны 3 и 4 выполнены с такими -длинами, что их отношение равно отношению длин соответствующих им плеч рычага.The converter comprises a two-arm lever 1, which is mounted on a fixed support 2. With the ends of the shoulders of the lever 1, using the connecting rods 3 and 4, the movable rods 5 and 6 are pivotally mounted in the guides 7 and 8. Moreover, with respect to the fulcrum, the rods are installed at a distance R . and g equal to the lengths of the shoulders of the lever 1, And; are located at the same angles to the shoulders of the lever, and the connecting rods 3 and 4 are made with such lengths that their ratio is equal to the ratio of the lengths of the lever shoulders corresponding to them.

Преобразователь работает следующим образом. Ведущим звеном может быть как шток 5, так и шток б. Например, линейное перемещение штока 5 в направляющей 7 приводит с помощью шатуна 3 к повороту рычага 1 отно- 5 сительно опоры 2, Поворот рычага 1 в свою очередь приводит с помощью шатуна 4 к линейному перемещению штока 6 по направляющей 8,.The converter operates as follows. The leading link can be both rod 5 and rod b. For example, the linear movement of the rod 5 in the guide 7 leads with the help of the connecting rod 3 to turn the lever 1 relative to the support 2, The rotation of the lever 1 in turn leads with the help of the connecting rod 4 to the linear movement of the rod 6 along the guide 8 ,.

Если ведущим звеном является шток 6, то его движение вызывает поворот рычага i и линейное перемещение штока 5 ,If the leading link is the rod 6, then its movement causes the rotation of the lever i and the linear movement of the rod 5,

Согласно расчетной схеме (см, фиг, 2) оС = qro sin (.4-cos γ);According to the calculation scheme (see, FIG. 2) оС = qro sin (.4-cos γ);

p>-arcsw ·γ-(4-οο5γ), где оС и Jd - соответственно углы поворота шатуна 3 и шатуна 4;p> -arcsw · γ- (4-οο5γ), where оС and Jd are the rotation angles of the connecting rod 3 and connecting rod 4, respectively;

γ - угол поворота рычага 1; соответственно длины25 шатунов 3 и 4.γ is the angle of rotation of the lever 1; respectively length 25 rods 3 and 4.

Из приведенных равенств видно, что при JL. г когда -у-, их правые части равны, т.е. oL=p .30 εгFrom the above equalities it is seen that for JL. d when -y, their right-hand sides are equal, i.e. oL = p .30 εg

Таким образом, при -- = —- за- иК · висимость перемещения шатунов выражается линейным уравнением:55 где х и у линейные перемещения шатунов 3. и 4.ГThus, when - = —- for- iK · the dependence of the movement of the connecting rods is expressed by the linear equation: 55 where x and y are the linear movements of the connecting rods 3. and 4. Г

Таким образом, описанный рычажный передаточно-множительный преобразователь прямолинейных движений может быть выполнен практически с неограниченным передаточным отношением постоянной величины при достаточно широком диапазоне перемещения конематического звена прямолинейного: движения на меньшем плече рычага, что обеспечивает создание . измерительных и других устройств, обладающих большим диапазоном изменения входной величины и высокой точностью,Thus, the described lever gear-multiplier transducer of rectilinear movements can be performed with an almost unlimited gear ratio of constant magnitude with a wide enough range of movement of the konematic link of the rectilinear: movement on the smaller arm of the lever, which ensures the creation. measuring and other devices with a large range of input value variation and high accuracy,

Claims

The invention relates to mechanical engineering and can be used in measuring, control and regulating devices. The lever-copying converter of linear movements is known, which contains a double-arm lever, whose shoulders are in contact directly with the links of linear movement 1. However, turning the lever is accompanied by sliding of its shoulders along the contact surfaces of the leading and leading elements of linear movement and changing contact points on these surfaces, as a result of which the accuracy of the transducer is significantly reduced. The closest technical solution to the invention is a lever transfer-multiplier b verters rectilinear motions comprising a pivot bearing mounted on two-armed lever, the two rod guides disposed in movable ydol them under odinakovymiuglami to the lever arm, and two connecting rods hinged binding ends of the lever arms with rods 2. However, the known transducer has a non-linear characteristic, as a result of which, with a large gear ratio, a significant transducer error appears. The aim of the invention is to obtain a linear characteristic of the converter. This is achieved by the fact that the ratio of the lengths of the connecting rods is equal to the ratio of the lengths of the respective arms of the lever from the point of its support to the installation point of each connecting rod. FIG. 1 is a circuit diagram of a converter; in fig. 2 - design scheme. The converter contains a double-arm lever 1, which is mounted on a fixed support 2, with the ends of the arms of lever 1 by means of connecting rods 3 and 4, movable rods 5 and b, mounted in guides 7 and 8, are hingedly mounted on the distance R. and g, equal to the lengths of the arms of the lever 1, And; are located to the arms of the lever at equal angles, and the connecting rods 3 and 4 are made with such lengths that their ratio is equal to the ratio of the lengths of the corresponding arms of the arms. The converter works as follows. The leading link can be either the rod 5 or the rod 6. For example, linear movement of the rod 5 of the guide 7 causes the rod 1 to rotate relative to the support 2 using the rod 3. Turning the lever does not turn the rod 4 through the rod 4 6 along guide 8 ,. If the leading Even is a piece 6f, then its movement causes the rotation of lever i and the linear movement of the piece 5. According to the design scheme (see, Fig. 2) OS qrc (-1-005 y); p) -arcsw -l-ct-cosj-). where ot. and ft are, respectively, the angles n of the gates of the connecting rod 3 and shat 4; 7 the angle of rotation of the lever and, respectively, the length of the rods 3 and 4.. From the given equalities to the view that, when - r, when -r--- / their right sides are equal, i.e. . WITH . Thus, the dependence of the movement of the connecting rods is expressed by a linear equation: X and y are the linear movements of the rods 3. and 4. ... Thus, the described lever transmission-multiplier converter of linear movements can be performed with practically unlimited gear ratio of a constant value with a rather wide range of movement of the linear element of the linear-movement on the smaller arm of the lever, which ensures its creation. Measuring and other devices with a large range of input variable and high accuracy. Claims of the invention A lever transmission-multiplier converter of rectilinear motions, which has a lever mounted on a hinged support, two rods arranged in guides with the possibility of mixing along them and under the same angles to the shoulders | levers and two connecting rods that pivotally connect the ends of the levers of the lever with the rods, o., tl and h with the fact that, in order to obtain a linear characteristic of the converter, the ratio of the lengths of the connecting rods is equal to the ratio of the lengths of the respective levers of the lever from the point his pillars support the installation of each connecting rod. . Sources of information taken into account during the examination 1. USSR Author's Certificate No. 174374, cl. G 01 B 3/22. 1962.

2. Patent of Germany No. 825749, .kl. 42 12/01, 1951 (prototype).