SU1355792A1 - Multidisc friction clutch with hydraulic control - Google Patents

Abstract

The invention relates to mechanical engineering, primarily to automobile tractor and road construction, and can be used in transmissions of machines. The invention aims to increase the durability of the coupling by improving lubrication conditions and cooling the mechanical amplifier due to its rational placement. The goal is achieved by the fact that the friction clutch contains a housing (K) 1 rigidly mounted on the shaft 2. The piston (P) 4 is complete at the same time as the inner drum 5 and installed in K 1. A mechanical amplifier in the form of a cam mechanism is placed between K 1 and P 4 in the working cavity formed by the cylindrical 6 and end 7 surfaces K 1 and the end P 4. The ends of the release spring 18 are fixed in P 4 and the stop disc 19. When the coupling is turned on, the torque rotates P 4 which causes the appearance of additional axial force from mechanical amplifier on disks 13 and 15. When the clutch is turned off, the spring 18 rotates and simultaneously moves P 4 to the initial position. The frictional forces on the bevelled surfaces of the mechanical amplifier are insignificant and do not affect the process of switching off the coupling. 3 il. i (L GZ with sd ate vl with to 17 n Figure 1

Description

one

The invention relates to mechanical engineering, primarily automotive, tractor and road building, and can be used in transmissions of cars.

The aim of the invention is to improve performance by reducing the drive's energy content and increasing the life of the coupling by improving the lubrication and cooling conditions of the mechanical amplifier.

Fig. 1 shows a multi-plate friction clutch, an axial section in Figs. 2 and 3 shows section A-A in Fig. I (embodiments of a mechanical amplifier).

The multidisk friction clutch with hydraulically controlled contains case 1, rigidly mounted on the drive shaft 2. Shaft 2 is complete with channel 3 of the control. Piston. 4 is integral with the inner drum 5 and installed in the housing 1. In the slave, cavity, formed by the inner cylindrical surface 6 and the end face 7 of the housing 1 with the end face 8 of the piston 4, a mechanical amplifier made in the form of a cam mechanism with a limited rotation, having cams 9 with beveled surfaces or bevelled grooves 10 with bowls mounted is placed - Kami 1I, executed on the end po13

surfaces 7 and 8 of housing 1 and porsche 4. On the drum 5, using a spline, a pressure disk 12 and drive disks 13 are mounted, held axially with a locking ring 14. Between the driving disks 13, there are slave disks 15 connected to the outer drum 16 with the help of slots. The drum 16 is rigidly connected to the driven shaft 17. A spring 18 is installed between the piston 4 and the stop disc 19 and is rigidly connected to its ends.

The clutch works as follows.

When the coupling is turned on, the working fluid under pressure is fed along channel 3 into the cylindrical cavity of housing 1 and moves piston 4 together with the pressure disk 12 up to the stop of the package of leading 13 and driven 15 disks into the resistant disk 19. The torque generated on the friction surfaces slows down the rotational speed of the driving discs 13 and, therefore, the piston 4 connected to them via

about 10

15

35

m m a3557922

the splines of the inner drum 5, Since the casing 1 together with the driving shaft 2 maintains the same rotational speed, the piston 4 rotates relative to the casing 1. The piston 4 rotates, in turn, the oblique surfaces of the cams 9 or the grooves IO and the appearance of a force moving the piston 4 in the axial direction relative to the body 1. The magnitude of this force depends on the magnitude of the moment of friction, which causes the piston 4 to turn, and on the angle of inclination of the beveled surfaces of the cams 9 or grooves 10. Force, create and by an amplifier, transmitted through the piston 4 and the pressure disk 12 on the surface of the friction, increasing the total pressing force and, as a result, the clutch moment developed by the clutch. A part of the pressing force is expended by the psi moving the piston 4 on the elastic compression and twisting of the release spring 18, the ends of which are rigidly fixed in the piston 4 and the stop disk 19.

The operability of the mufta is preserved even when the direction of the torque is changed, which is ensured by the symmetrical arrangement of the beveled surfaces of the cams 9 or the grooves 10, filled with the lateral surfaces of the housing I and the piston 4.,.

20

25

thirty

0

five

g

55

When the clutch is turned off, the working fluid is drained from the working cavity formed by the cylindrical surface 6 and the end 7 of the housing I and the end surface 8 of the piston 4. The pressing force decreases to zero. J8 spring pushes and simultaneously moves piston 4 in. the initial position, squeezing the working fluid from the working cavity through the channel 3 to the drain. Since the rotation of the Porsch 4 occurs under the action of the elastic twisting forces of the spring 18, the frictional forces on the beveled surfaces of the cams 6 or the slots 7 of the mechanical amplifier are insignificant in magnitude and do not affect the clutch cut-off process.

Claims (1)

Claims. A multi-disc friction clutch is hydraulically controlled, comprising a housing, a piston, a mechanical amplifier kinematically connected with a piston and a housing, an inner and outer drums, a pressure disk, driving and driven disks, a thrust disk and a release spring, which is to improve performance by reducing power consumption of the drive and increasing durability by AiA improving the lubrication and cooling conditions of the mechanical amplifier; the mechanical amplifier is designed as a cam mechanism with a limited rotation, placed on the front surfaces of the housing and the piston, forming the working cavity; the ends of the release spring are fixed in the piston and the stop disk, and the inner drum is integral with the piston. 4l2 x FIG. 2 eleven FIG 3 Compiled by I.Lukina Editor A.Lezhnina Tehred M.Hodanich Proofreader V. But ha Order 5763/33 Circulation 804Subscription VNIIPI USSR State Committee for inventions and discoveries. 113035, Moscow, Zh-35, Raushsk nab., 4/5 Production and printing company, Uzhgorod, st. Project, 4