SU877175A1

SU877175A1 - Double-step wedge-belt variable speed drive

Info

Publication number: SU877175A1
Application number: SU802882036A
Authority: SU
Inventors: Сергей Николаевич Кожевников; Евгений Яковлевич Антонюк; Анатолий Иванович Ткачук
Original assignee: Институт Механики Ан Усср
Priority date: 1980-02-13
Filing date: 1980-02-13
Publication date: 1981-10-30

Description

(54) ДВУХСТУПЕНЧАТЫЙ КЛИНОРЕМЕННЫЙ ВАРИАТОР(54) TWO-SPEED WEDGEEN VARIATOR

II

Изобретение относитс к машиностроению и может быть использовано в агрегатах с измен емой скоростью рабочих органов .The invention relates to mechanical engineering and can be used in units with variable speed of the working bodies.

Известен двухступенчатый клиноременный барнатор скорости, содержащий ведущий Н ведомый шкивы посто нного днаметра , блок регулируемых промежуточных щкнвов, охватывающие их ремни, и механизм управлени {.The two-stage V-belt speed barnator is known, which contains the driving N driven pulleys of constant pressure, a block of adjustable intermediate shells covering their belts, and a control mechanism {.

Недостаток вариатора заключаетс в низкой надежности, обусловленной тем, что одни из ремней работает в режимах, близких к буксованию.A disadvantage of the variator is the low reliability due to the fact that one of the belts operates in modes close to skidding.

Цель изобретени - повышение надежности и долговечности вариатора.The purpose of the invention is to increase the reliability and durability of the variator.

.Поставленна цель достигаетс тем, что механизм управлени снабжен устройством дл компенсации выт жки ремней в виде двух, ползунов и закрепленными на них ос ми, на которых установлены упом нутые промежуточные шкивы с возможностью относительного перемещени , взаимодейст .вующего с ползунами двуЛлечего рычага, воздействующей на рычаг пружины, св занных с пружиной ролика и упора и, взаСКОРОСТИThe goal is achieved by the fact that the control mechanism is equipped with a device for compensating the stretch of the belts in the form of two sliders and fixed axles on them, on which the mentioned intermediate pulleys are mounted with the possibility of relative movement interacting with the sliders of the two-arm arm acting on spring lever associated with the spring of the roller and stop and, in cope

имодействующих с последними, направл ющих , а ведомый шкив выполнен из двух блоков, св занных дифференциалом.operating with the latter, guides, and the driven pulley is made of two blocks connected by a differential.

На фиг. 1 представлен вариатор, общий вид; на фиг. 2 - то же, вид сверху; на фиг. 3 - сечение А-А на фиг. 1.FIG. 1 shows the variator, a general view; in fig. 2 - the same, top view; in fig. 3 is a section A-A in FIG. one.

Вариатор содержит ведущий шкив 1, ведомый шкив 2, промежуточные шкивы 3, ремни 4, механизм 5 управлени , ползуны 6 с ос ми 7, двуплечий рычаг 8, пружину 9, ролик 10, упор 11, направл ющие 12, блоки 13 и дифференциал 14, а также регулировочную гайку 15.The variator contains a driving pulley 1, a driven pulley 2, intermediate pulleys 3, belts 4, a control mechanism 5, sliders 6 with axles 7, a two-arm lever 8, a spring 9, a roller 10, an emphasis 11, guides 12, blocks 13 and a differential 14 as well as the adjusting nut 15.

Вариатор работает следующим образом . .The variator works as follows. .

15 Одинаковое нат жение ремней 4 осуществл етс посредством пружины 9, котора воздействует через двуплечий рычаг 8 и ползуны 6 на оси 7 промежуточных регулируемых шкивов 3. Компенсационный поджим пружины 9 осуществл етс через15 Equal tension of the belts 4 is carried out by means of a spring 9, which acts through a double-arm lever 8 and sliders 6 on the axis 7 of the intermediate adjustable pulleys 3. The compensation biasing of the spring 9 is performed through

Claims

the roller 10 abutting against the lower curvilinear guide 12. The required spring force is adjusted by the nut 15, the optimum value of this force in different positions of the control mechanism 5 is provided by the corresponding profile of the lower curved guide. The stop 11 and the upper curvilinear guide 12, between which the necessary clearance S is set, limit the degree of weakening of the tension of the belts 4 as a result of possible oscillatory movement of the sliders 6. The mismatch of the current values of the resulting transmission ratios, caused by the deviations of dimensions and geometry of the working surfaces of the belts 4, the working surfaces of the profile grooves of pulleys I-3, the radial runout of these grooves, the unequal stiffness of the belts and the inconstancy of it along the length of the belts, do not cause redistribution ELENI traction forces in the belts 4 due to the presence Differential 14 which averages the gear ratio of the parallel branches. The use of the invention improves traction reliability and durability. Claims of the invention. A two-stage speed and variable speed drive module comprising driving and driven pulleys of constant diameter, a block of adjustable intermediate pulleys covering their belts, and a control mechanism characterized in that. in order to increase. the reliability and durability of the variator, the control mechanism is equipped with a device for compensating the stretching of belts in the form of two sliders with axles fixed on them, on which the mentioned intermediate pulleys are mounted with the possibility of relative movement interacting with the sliders of the double-arm lever acting on the spring lever. - svanyanny with a spring of a roller and an emphasis and. interacting with the latter, directing, and the driven pulley is made of two blocks connected by a differential. Sources of information received during examination at examination I. Other B. A., Revkov G. A. Stepless wedge-belt and friction gears. M., “Mechanical Engineering, 1967, p. 192, fig. Q7 (prototype).