SU804936A1

SU804936A1 - Safety clutch

Info

Publication number: SU804936A1
Application number: SU792726747A
Authority: SU
Inventors: Борис Георгиевич Кобцев; Василий Николаевич Коськин; Иван Исидорович Кондратенко
Original assignee: Всесоюзный Заочный Машиностроительныйинститут
Priority date: 1979-02-19
Filing date: 1979-02-19
Publication date: 1981-02-15

Description

(54) ПРЕДОХ1 АНИТЕЛЬНАЯ МУФТА(54) ENABLE PIPE

1one

Изобретение относитс к мгиаино- (строению и примен етс дл уменьшени пусковых перегрузок в приводе машин, в частности, оборудованных многоскоростными двигател ми.The invention relates to a midi-no (structure and is used to reduce starting overloads in the drive of machines, in particular, equipped with multi-speed motors.

Известна фрикционна предохранительна муфта, содержаща подпружиненные подвижную и неподвижную полумуфты , установленные навалах и устройство дл автоматического отвода полумуфт при перегрузках, маховик которого смонтирован на резьбе ведомого вала и установлен в подшипниках неподвижной стойки. Маховик снабжен передачей, например цепной, одна звездочка которого смонтированд1 на ступице маховика, а друга - на резьбе ведомого вала с возможностью осевого перемещени , св зана с подвижной полумуфтой i The known friction clutch contains a spring-loaded moving and stationary coupling half, installed in bulk and a device for automatic removal of coupling half during overloads, the flywheel of which is mounted on the thread of the driven shaft and mounted in bearings of a fixed rack. The flywheel is equipped with a transmission, for example, a chain wheel, one of which has an asterisk mounted on the hub of the flywheel, and the other is axially movable on the thread of the driven shaft and is connected to the moving half coupling i

Однако муфта не может быть использована на реверсивных валах, не обеспечивает надежной защиты от перегрузок , обладает громоздкой конструкцией .However, the clutch cannot be used on reversing shafts, does not provide reliable protection against overloads, has a cumbersome design.

Наиболее близким техническим решением к изобретению по технической сущности и достигаемому эффекту вл етс предохранительна фрикционна муфта, содержаща ведущую и ведомуюThe closest technical solution to the invention according to the technical essence and the achieved effect is a safety friction clutch containing the master and the driven

полумуфты, соединенные фрикционными дисками, поджатыми нажимным диском. На ведомой полумуфте свободно установлен маховик, св занный с нгикимным диском кулачками, выполненными на их смежных торцах и пружиной р .coupling halves connected by friction discs pressed by the pressure disc. On the driven half coupling, a flywheel is freely mounted, which is connected with a nykimny disk by cams made on their adjacent ends and a spring p.

Однако, муфта неприменима а реверсивных приводах и обладает склонностью к автоколебани м маховика и However, the clutch is not applicable to reverse drives and has a tendency to self-oscillations of the flywheel and

0 не обеспечивает защиты привода от перегрузок при остановке машины.0 does not protect the drive from overloading when the machine is stopped.

Цель - повышение долговечности и плавности срабатывани муфты.The goal is to increase the durability and smooth operation of the clutch.

Цель достигаетс тем, что предо5 хранительна муфта, содержаща ведущую и ведомую полумуфты, соединенные фрикционными дисксши, поджатыми через нажимной диск регулируелыми пружинами , и барабан, свободно установ0 ленный на одной из полумуфт, снабжена телами вращени втулкой, помещенной между нажимным диском и пружиной, а на смежных торцах втулки и барабана выполнены углублени и тела качени The goal is achieved by preloading clutch containing the drive and driven half couplings, connected by friction discs, pressed by the adjustable springs through the pressure disc, and the drum, freely mounted on one of the half couplings, equipped with rotation bodies with a sleeve placed between the pressure disc and the spring, on the adjacent ends of the sleeve and the drum there are recesses and rolling bodies

5 расположены в них с зазором, при этом на барабане выполнена полость, заполненна инерционной рабочей средой.5 are located in them with a gap, while on the drum there is a cavity filled with inertial working medium.

Claims

FIG. 1 shows the coupling, general view, longitudinal section; in fig. 2 - 0 section A-A in FIG. 1. The coupling consists of half couplings 1 and 2, friction 3 and pressure discs 4, which are constantly squeezed through the sleeve 5 by an adjustable spring 6. On the coupling half 2 on the bearing 7 a flywheel 8 is installed, having an annular cavity 9 filled with inertial working medium, for example, viscous liquid or loose substance. At the adjacent ends of the flywheel 8 and the sleeves 5 there are recesses 10, which have a slit-like shape (FIG. 2) in a cylindrical section. In the recesses 10 with a gap, the bodies of rotation are placed balls 11. At rest or with uniform motion with a gap between the balls 11, the sleeve 5 and the flywheel 8, the spring 6 through the sleeve 5 and the pressure disk 4 compresses the friction disk 3 and machine protection against working overloads. During acceleration or deceleration, the rotation of the half-coupling 2 occurs with acceleration (or deceleration), and consequently, the flywheel is accelerated (decelerated), which will cause the flywheel 8 to rotate relative to 2. At the same time, after selecting gaps, the balls 11 are stuck in the recesses 10 between the flywheel 8 and the hub 5 and thus perceived part of the force of the spring b. The compression of the friction disk 3 is reduced, which causes the clutch to slip at low values of the transmitted torque. This provides a reduction in overloads with water as at the start, so the machine stops. When the change in the velocity of the fluid in the annular cavity 9 of the flywheel 8 is delayed relative to the latter, a smooth change in its position and, consequently, of the torque transmitted is observed. After reaching the steady state of motion, the acceleration acting on the flywheel 8 disappears, and under the action of the spring 6 when the walls of the recesses 10 are inclined, the flywheel 8 occupies the initial position. When recesses 10 (Fig. 2) are used, the coupling is used in reversible, reversible and multi-speed drives, as well as for connecting a 1-shaft with a pulley. Claims of the invention Safety clutch containing drive and driven coupling halves connected by friction discs pressed by the adjustable springs through the pressure disc and drum freely mounted on one of the coupling halves, characterized in that in order to increase durability and smooth operation, as during the acceleration period during braking, it is provided with rotation bodies, a sleeve placed between the pressure disk and a spring, and on the adjacent sleeves and drum there are recesses and the rolling bodies are located in them with a gap m drum a cavity, filling the inertia of the working medium. Sources of information taken into account in the examination 1. The author's certificate of the USSR 563519, cl. F 16 D 43/20, 1975.

2. USSR author's certificate number 371362, cl. F 16 D 7/02, 1971 (prototype).

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