SU1438623A3 - Hydraulic drive for imparting turning motion to knuckle,particularly,to steering knuckle - Google Patents

Abstract

Hydraulic actuator for turning movement of a knuckle, especially a steering knuckle, a torus shaped guiding path for pistons (4, 5) comprising a carrier ring (3) connected to the knuckle (8), the carrier ring (3) thereby establishing the inner circumference of the path and being sealingly moveable against a lower part (2) and an upper part (1) which is secured to the lower part and which together establish the rest of the path and being stationary, at least one piston (4) being sealingly displaceable in the guiding path and fixed to the carrier ring (3) and at least one fixed piston (5) secured to the lower part (2), whereby channels (9, 10) establish input and output for hydraulic fluid to diametrically opposed spaces between a displaceable piston (4) and a fixed piston (5), the carrier ring (3) being connected turnable with the steering knuckle (8) and displaceable in the axis direction thereof by means of two diametrically opposed pins (7) connected with the knuckle (8), received in corresponding bearing linings in the inner circumference of the carrier ring.

Description

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equal to the toroidal chamber. The ring 3 is connected to the trunnion 5 and is mounted for movement relative to the housing. At least one movable piston (P) attached to ring 3 and one fixed P attached to part 2 are installed in the chamber with the formation of working cavities. Channels 9, 10 are made for supplying and discharging hydraulic fluid in cavity 4. The ring 3 is rotatably connected to the pin 5 and is mounted to move in the direction of its axis by means of two diametrically opposite fingers 15. The fingers are connected to the pin 5 and enter 17 corresponding bearings (B) 17 on the inner circumference tsa 3. 9, 10 formed in two concentric annular de K in parts 1, 2, R 9 is bonded connection. K 11 with an outlet at one side of each P 6, and K 10 with the other

The invention relates to a hydraulic drive of a trunnion, such as a steering, and can be used to drive a trunnion in a pivotal movement by an angle less than 360.

The purpose of the invention is to increase the reliability of the hydraulic drive.

On .fig. 1 shows a hydraulic drive, general view; in fig. 2 - the same, horizontal projection; in fig. 3 - the same, cross section through the piston; in fig. 4 shows section A-A in FIG. 2; in fig. 5 is a drive diagram with hydraulic devices.

The hydraulic drive comprises an upper part 1, a lower part 2 and a supporting ring 3, forming a toroidal guiding chamber with working cavities 4. The latter are located around and at a right angle to the trunnion 5, in this case to the steering.

Two pistons 6 are fixedly attached to the lower part 2 in a diametrically opposite position relative to each other, and to the ring bearing side P 6. The side P 6 facing inward to the ring is angled to a cylindrical surface parallel to the axis. B 17 is made in the form of rectangular support bosses with central apertures for rotary movement of the fingers 15. B 17 are mounted for vertical movement along the guides on the ring 3 abutting on the outer end surfaces B 17. In the lower part of the part 2 there is a reservoir for hydraulic fluid. Each outlet is provided with a shut-off valve for communication with K 9, 10 or with a reservoir for depressurizing the hydraulic fluid. If it is possible to pivot the pin 5 in both directions B, the connection between the fingers 15 and the ring 3 does not arise due to the change in the length of the fingers 15 under the influence of t-shifts or bending deflection of the rotary coupling. 4 3.P.f-ly, 5 silt with

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The cisu 3 is also in a diametrically opposite position relative to each other and between the pistons 6 two pistons 7 are fixedly attached. Seals 8 are provided on both sides of each of all pistons 6 and 7.

The upper part 1 is fixedly connected to the lower part 2, while the supporting ring 3 has the ability to rotate the relative upper and lower parts 1 and 2. Thus, the pistons 7 fixedly attached to the supporting ring 3 can be moved inside the cavity 4 relative to the pistons 6 that are attached to the bottom 2.

Both in the upper part 1 and in the lower part 2 there are two grooves, which together form the channels 9, 10 for the hydraulic fluid. From channels 9 and 10, the connecting channels 11 lead to the outlet openings 12 located on either side of the pistons 6. Accordingly, on the lower part 2 there are connecting devices for feeding and

Release of hydraulic fluid B channels 9 and 10.

A shut-off valve 13 is provided in each connecting channel 11, which provides communication between the channels and 10 and the toroidal cavity 4 of the ILP-1 and the cavity 4 and the reservoir 1D installed in the lower part 2. The position of the shut-off valve 13 makes it possible to reduce the pressure in the cavity 4 if it is necessary, for example, as a result of the presence of any defects, for example leakage in some part of the cavity 4.

The fingers 15 of the rotor 16 are mounted in the liners 17 of the cushion and can be rotated. OTHocHTejibiio inserts 17 exposure to temperature changes.

In one embodiment, the fingers 15 are attached to the rotor 16, which, in turn, is rigidly connected to the trunnion 5. In another embodiment of the hydraulic drive (Fig. 1-3), the trunnion 5 has the ability to rotate in both directions when the channels 9 or 10, as a result, in the connection between the fingers 15 and the carrier ring 3, no special efforts arise due to changes in the length of the fingers 15 under the influence of temperature changes or bending deflection of the rotary coupling from the theoretical axis under the influence of the forces applied to pin 5 or to the steering wheel. Inclined mounting of the actuator relative to the pivot pin 5 does not affect the connection between the actuator and the rotary center. A possible expansion of the rotor 16 can also be selected by bearing liners 17.

In the lower part 2, flange 19 is made to be fixed in the desired position.

Hydraulic drive works as follows.

When creating pressure in one of the channels, for example in channel 10, hydraulic fluid flows through the connecting channel 11 and exits through the outlet 12 to two

When diametrically opposite to the spaces of the cavity 4, the piston 7, attached to the bearing ring 3, will be pressed from the corresponding hub. the piston 6, while the hydraulically driven fluid located on the other side of the piston 6 is discharged through the opposite outflow opening 12 and the connecting channel 11 into the channel 9 for return to the tank 14 communicating with the hydraulic unit. The carrier ring 3 moves relative to the lower part 2, thereby resembling two diametrically opposed fingers 15 connected to the bezel 5.

Fo rmula and 3 obre ts i 1. Hydraulic actuator for communication of a pivot dipper pin, in particular a steering wheel, comprising a housing, a composite part of the upper and ui Dnneii parts, a ring connected with a pin moving relative to the lower and upper parts of the housing and forming with the latter a toroidal chamber guide, in which at least one movable piston attached to the supporting ring and one fixed piston are attached to the lower part and channels for supplying and discharging hydraulic fluid into the working cavities, characterized in that, in order to increase reliability, the carrier ring is connected with the trunnion with the possibility of rotation and mounted with the possibility of movement in the direction of its axis by means of two diametrically opposite fingers connected to the trunnion and the bearings included in the corresponding bushings on the inner circumference of the carrier ring, the channels for years of hydraulic fluid are made in the form of two concentric ring channels in the lower and upper parts, of which one annular duct associated connecting channel to the outlet at one side of each fixed piston and a second annular channel co responsibly coupled to the other side of said piston.

2. The drive according to claim. 1, characterized in that it is reversed.

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Figz

Order 5975/59

Circulation 652

VNIIPI. USSR State Committee

 for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

1438623

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Subscription

Claims (5)

Claim 1. A hydraulic actuator for communicating pivoting movement of a trunnion, in particular a steering, comprising a housing composed of upper and lower parts, a bearing ring connected to the trunnion and mounted to move relative to the lower and upper parts of the housing and forming a toroidal chamber with the latter, in which with the formation of working cavities, at least one movable piston attached to the bearing ring and one stationary piston _# attached to the lower part of the housing, channels for supply and drainage of hydraulic fluid into the working cavities, characterized in that, in order to increase reliability, the bearing ring is rotatably connected to the axle and installed to move in the direction of its axis by means of two fingers diametrically opposed connected to the axle and included in the corresponding bearing shells on the inner circumference of the bearing ring, hydraulic fluid channels are made in the form of two concentric annular channels in the lower and upper parts, of which one the annular channel is connected by a connecting channel to the outlet at one side of each stationary piston, and the second annular channel is respectively connected to the other side of the specified piston. 2. Drive pop. 1, characterized in that the side of each fixed piston facing inward to the bearing ring is beveled to a cylindrical surface parallel to the axis. 3. The drive according to claim 1, characterized in that the bearing shells are made in the form of rectangular support bosses with central holes for pivoting the fingers and are mounted to move vertically along the rails on the bearing ring abutting against the outer end surfaces of the shells. 4. 'Drive on and. 1, from the list of the following: and with the fact that in the lower section of the lower part of the housing there is a reservoir for hydraulic fluid. 5. Drive on pl. 1-4, with the exception that each outlet is equipped with a shut-off valve that is installed with the possibility of periodic communication with the corresponding annular channel or from the tank to relieve pressure of the hydraulic fluid. FigMfig?