SU1455079A1 - Safety friction clutch - Google Patents

Abstract

The invention relates to mechanical engineering, in particular to devices for transmitting rotation. The purpose of the invention is to increase the damping capacity of the coupling by further compressing the friction surfaces with elastic elements. The half couplings 1 and 2 are interconnected by means of a friction disk (D) 3. The pressure D 7 is preloaded by a spring 13. On the stop D 4 and the pressure sleeve 5 there are made variable depth jacks in which the balls 6 are located. When transmitting the torque, the balls 6 the squeezing force of friction D 3 and pressure D 7 is weakened. When the torque value exceeds D 3 and 7, they slip relative to each other. At the same time, the springs 12 tighten the additional pressure D 9 to the friction D 3, which increases the elastic coupling between the coupling halves 1 and 2 and increases the damping capacity of the coupling. 4 il. (Л с 4 СП СП о sj со фь. 1

Description

The invention relates to mechanical engineering and, in particular, to devices for transmitting rotation.

The purpose of the invention is to increase the damping capacity by additionally compressing the friction surfaces with elastic elements.

Fig. 1 shows a kinematic scheme of a safety friction clutch; in fig. 2 is a section A-A in FIG. 1; Fig, 3 - a general view of the friction disk; Fig, 4 - section BB in Fig ,, 3,

The safety friction clutch contains coaxial leading 1 and Vedo-M5PO 2 coupling halves connected by a friction disk 3 articulated to coupling half 2 by means of a splined coupling. The disk 3 on the left rests on the thrust disk 4 through the thrust bearing. The pressure sleeve 5 is installed freely relative to the half coupling 1. In the sleeve 5 and the stop disk 4, variable depth slots are made, the working surfaces of which are outlined by curvilinear generators (FIG. 2), convex toward the balls 6 placed in the slots. The clutch pressure plate is made in the form of two disks concentric with each other; The main 7, mounted on the sleeve 5 by means of the guide key 8, and an additional 9 connected to the disk 7 by the guide key 10, Between the disks 9 and 7 are installed the compression springs 11s and between the pressure sleeve 5 and the disk 7 - the compression spring 12. The disk 7 is pressed against the disk 3 by a compression spring 13, the force of which can be adjusted by the axial movement of the adjusting element 14, the force 13 exceeds the total force of the springs 11 and 12, the friction disk 3 is made up of two concentric sections (FIG. 3) attach to disk 3 and made, for example, from asbestos-friction material, retinax, etc. The inner portion is the body of the disk 3, made, for example, of steel. The pressure plates 7 and 9 are made of metal. Thus, the coefficient of friction in a pair of disc 7 - pad 15 exceeds the coefficient of friction of a pair of disc 9 - disc 3,

The safety friction clutch operates as follows.

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five

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five

When the load on the pressure sleeve 5 is transferred, there is a moment of resistance on the side of the pressure plates 7 and 9, as a result of which there is an expansion force on the balls 6, directed towards the force of the spring 12 and pressing the pressure sleeve 5 to the right (figure 1): the spring 12 is compressed and a decrease in the force of pressing the pressure disc 7 onto the friction disk 3. This leads to a decrease in the moment of friction forces in a pair of disk 7 - pad 15, Balls 6, rolling along the nests of the stop disc and pressure sleeve 5, moving to the working surface sections nests with bol PWM pressure angle, which leads to an increase in the spacing of the force acting on the pressure plate 7,

With an increase in the moment of resistance forces on the driven half coupling 2, due to an increase in the coefficient of friction, the thrust force also increases, as a result of which the force of the spring 12 exceeds the force of the spring 13 and the pressure disk 7, moving to the right, breaks contact with the cover 15, the described process is accompanied by increasing , by the pressure angle of the balls 6,

Therefore, when the clutch is activated, the friction surfaces additionally have a spring 12, which increases the damping capacity of the clutch.

The use of the invention makes it possible to increase the reliability of the operation of the coupling by increasing the damping capacity, as well as to increase the durability of the coupling.

Claims (1)

Invention Formula A safety friction clutch containing coaxially placed coupling halves connected by means of a friction disk placed between the thrust and spring-loaded pressure disk, the spring force adjustment unit, and the squeezing device in the form of rolling elements installed in the wells of variable depth, one of which is made resistant disk, characterized in that, in order to increase the damping capacity, it is equipped with an additional pressure disk and pressure sleeve, which are located concentrically with the main pressure U disk and spring-loaded relative thereto to upornoA-A s / 75 FIG. 3 6- 6 noSepf f / fno 75 FIG. 2 Compiled by I. Yatsunov. Editor I. Segl. Tekhred L. Oliynyk. Corrector A. Vorovich Order 7432/41 Circulation 698 VNIIPI State Committee for Inventions and Discoveries at the State Committee on Science and Technology of the USSR 113035, Moscow, Zh-35, Raushsk nab. 4/5 FIG. Subscription