SU570740A1 - Hydraulically controlled double friction clutch - Google Patents

Description

one

The invention relates to the field of mechanical engineering and can be used, in particular, in the structures of automobile gearboxes and road-building machines.

A dual clutch is known, comprising a housing, a fixed partition, two sets of driven and driving discs, pistons, a valve and springs, mounted between the valve and the wall of the partition 1.

The disadvantages of this double friction are that when you turn on the right side of the double right friction, the spring deforms and the similar left spring located on the left side of the friction relaxes and the neutral friction lock is not reached when the pressure is released.

A dual clutch is also known, comprising a housing, a fixed partition, two sets of driven and driving disks, main and all-round winches and springs mounted between the auxiliary walls and the partition wall 2.

This design is closest to the invention in its technical essence and the effect achieved.

The disadvantages of such a friction clutch also consist in the uneven deformation of the springs and the absence of a clear fixing of the neutral. At the same time, coil springs installed between the auxiliary pistons and the partition wall have a relatively small length and, therefore, an unfavorable characteristic.

The aim of the invention is to increase

smooth switching and secure fixing

in neutral as well

increase manufacturability.

This is achieved by the fact that the coil springs

Neutral fixation devices of base pistons are equipped with glasses installed in a pair-opposite way with the possibility of axial movement in the dividing walls of the housing dividing wall so that each axial shaft contacts the end surface with the same number of different torn pre-loaded springs and cups, and each neutral fixation spring The auxiliary pistons are installed in the opening of the separation wall and preloaded with the ends of the auxiliary pistons.

In this case, the holes in the housing for connectors connecting the main pistons and the openings

for glasses are made of equal diameters and

equidistant on circumference

which is located on the axis of rotation of the housing;

FIG. 1 shows the described coupling in

longitudinal section along the springs; FIG. 2 is the same for OS m shtaig and igtift.

The hydraulically controlled double-slip clutch consists of a cylindrical body 1, made in one piece, with a hub 2 and a dividing wall 3, two main pistons 4 and 5 connected between each other by rods b, two sets of driving and driven discs 7, 8 and 9 , 10, two stop discs 11 and 12, bounded by retaining rings 13 and 14, an even number of cylindrical helical springs 15 and 16 with cups 17 and 18 with shoulders, pairwise and opposite to each other in the openings of the separation wall 3 between the main pistons 4 and 5. In case 1 holes for glasses 17, 18 and connecting rods 6 equally spaced on the same diameter are made. The coupling also contains two auxiliary pipes 19 and 20 with springs 21 installed between them and the passage of shimn through holes in the dividing wall 3, retaining rings 22 and 23; pistons 19 and 20 have throttle bores 24 and 25 and are fixed to one another relative to each other, pin 26; seals 27-29 and 30-32 of the seats of the main pistons 4 and 5, as well as seals 33 and 34 of the mounting diameter of the auxiliary pistons 19 and 20.

Thus, the coupling contains cavities AI and A2 formed between the main pistons 4 and 5 and cavities BI and BZ formed between the auxiliary pistons 19 and 20. The seals 35 isolate these cavities from one another and from the overflow holes 36 connecting them made in the separation wall 3. The pistons 19 and 20 have annular seals 37 and 38. In addition, the design provides for the hubs of gears 39 and 40 with radial holes 41 and 42, axial inlet channels 43-45 of shaft 46 with radial holes 47-50 and seals 51-54 and 55-58, sealing radial holes 49 and 50.

The hydraulically controlled double friction clutch operates as follows.

Fluid from a power source, such as a pump (not shown), flows through a distribution device, such as a spool box (not shown), into channels 43 and 44. When the right friction clutch is turned on, liquid through channel 43 through the radial hole 49 is fed into the cavity AI, limited auxiliary 19 and 4 main pistons.

The piston 4, under the pressure of the fluid in the cavity AI, begins to move to the right together with the piston 5 located on the opposite side in the housing 1, compressing the spring 16 acting on the piston through the cups 18. The pistons 4 and 5 are connected to each other by connecting rods 6 passing through holes in the separation wall 3 of the housing 1. Liquid from the cavity B2 when the pistons 4 and 5 move to the right flows into the cavity BI through the opening 36 in the separation wall 3 of the housing 1. Due to the greater rigidity of the spring 21 acting on the auxiliary pistons 19 and 20, In the spring 16, the piston 19 is in the extreme right position and pressed against the retaining ring 23. When the piston 4, moving to the right, selects the gap between the disks 7 and 8, i.e. will press these disks to the stop disk 11, the movement of which to the right is limited by a retaining ring 13, the pressure in the cavity AI increases, and the piston 19, overcoming the resistance of the springs 21, shuffles to the left and closes the overflow holes 36 with an annular seal 37.

The fluid from the cavity AI through the throttle bore 24 passes into the cavity BI and, due to an increase in pressure in the cavity AI, the main piston 4 tightly compresses the disks 7 and 8.

When the distributor (spool box) overlaps the space in the cavity AI, it overlaps the auxiliary piston 19 under the action of the springs 21 to the right until it stops into the locking ring 23, thereby opening the holes 36 in the separation wall 3, connects the cavities BI and Bd, and the main pistons 4 and 5, under the action of the springs 16, move to the left, setting to the neutral position.

To turn on the left friction fluid through the channel 44 through the radial hole 50 is fed into the cavity A2. The main piston 5, under the pressure of the fluid in the cavity AZ, begins to move to the left together with the piston 4 located on the opposite side in the housing 1, compressing the spring 15 acting on the piston 5 through the cups 17. Since the pistons 5 and 4 are interconnected by connecting rods 6, passing through the holes in the separation wall 3 of the housing 1, then the liquid from the cavity B when the pistons 5 and 4 move to the left flows into the cavity of the BZ through the holes 36 in the separation wall 3 of the housing 1. Due to the greater rigidity of the springs 21 acting on the auxiliary Yelnia porschni 19 and 20 than the springs 15, the auxiliary piston 20 is in its leftmost position, ie. e. pressed to the retaining ring 22.

When the piston 5, moving to the left, selects the gap between the discs 9 and 10, i.e., firmly squeezes these discs against the stop disc 12, whose movement to the left is limited by the retaining ring 14, the pressure in the cavity AZ increases and the piston 20 overcomes the resistance of the springs 21 , moves to the right and overlaps with the ring seal 38 of the hole 36.

Fluid from the bed A2 through the throttle bore 25 enters the cavity B2 and due to the pressure increase in the latter, the main piston 5 tightly compresses the discs 9 and 10.

When the distributor (spool box) of supplying fluid into cavity A2 overlaps, the auxiliary piston 20 under the action of springs 21 moves to the left against the stop into the retaining ring 22, thus opening the openings 36 in the separation wall 3, connects the cavities B2 and Bb, and the main pistons 5 and 4 under the action of the springs 15 are moving

set to neutral position. The cups 17 and 18 are sealed with seals 35, mounted in the partition wall 3.

To cool the disk surfaces, liquid from the power source (pump) enters channel 45 and through radial hole 47 enters disks 7 and 8, and through holes 41 in gear hub 39 enters pipe 1ms surfaces of disks 7 and 8 n through radial hole 48 enters the disks 9 and 10, and through the holes 42 in the hub of the gear 40 to the surfaces of the disks 9 and 10.

Due to the constant presence of fluid in cavity B and b, the effect of centrifugal forces is reduced to zero.

The switching of the coupling occurs quickly, since the fluid is constantly in the cavity B and B2 and flows from one cavity to another through the holes 36.

The smoothness of the work is achieved by the fact that the additional supply of liquid for raising the pressure in cavities B and B2 is carried out through the throttle aperture 24 and 25.

Thus, the proposed technical solution makes it possible to increase the smoothness of friction clutches engagement, the rigidity of fixing the neutral, and also improve manufacturability.

Claims (2)

1. Double friction clutch with hydraulic adjustment, comprising a housing with a dividing wall, having a hub with openings for supplying fluid, main and auxiliary ring pistons with seals mounted on the hub, the main of which are interconnected rods passing through holes in the housing, the axes of which are parallel to the axis of rotation of the housing and provided with a centering device for fixing the neutral with helical springs, and the auxiliary ones are mounted for axial movement on the hub limited by retaining rings, also equipped with a spring device for fixing the neutral , what, In order to increase the smoothness of activation and reliability of fixing the pistons in the neutral position, the coil springs of the neutral fixing device of the main pistons are provided with cups installed oppositely with the possibility of axial stirring, enp in the dividing wall of the housing so that each of the main pistons contacts the end surface with the same number different ends The preloaded spring springs are cTaii, a, new, and each of the springs of the auxiliary piston neutral locking device is installed in the opening of the separation wall and preloaded by the ends of all-supporting pistons. 2. Coupling according to claim 1, characterized in that, in order to improve the manufacturability, the holes in the rod for the rods, the cores of the main pistons, and the holes for the cups are made of equal diameters and are evenly spaced on a circle whose center is located on the axis of the body. Sources of information taken into account in the examination 1- Gapo N.T.T. Friction automatic transmissions. M., “Mashinostroenne, 1966, p. 40 and 68. 2. USSR author's certificate No. 206956, cl. F 16 D 25/06, 1967. / - / 2 S 1 30 3 23 I /. 9 y.O / Jf 18 5 / ug, / Ptj-