RU89026U1 - FRONT HYDRAULIC SHOCK VALVE DEVICE FOR VEHICLE - Google Patents

Abstract

The recoil valve of the front hydraulic shock absorber of the car, including a nut with a thread on the inner surface for screwing onto the rod, spring, plate, washer, disk, throttle disk, characterized in that the lower part of the nut is cylindrical with thread on the outer surface and is additionally equipped with a thrust nut, the diameter of the inner cylindrical surface of which and the thread on it correspond to the outer diameter and thread of the nut for their threaded connection, and the outer surface of the thrust nut is a cylinder PDR, the outer diameter greater than the outer diameter of the spring, turning into a cone, in which the lower base formed pins, corresponding openings in the holder compression valve.

Description

The invention relates to automotive technology, and in particular to a device for improving the smoothness of the car without loss of control when changing the profile of the road surface and "adjusting" the stiffness of the front hydraulic shock absorbers to suit the driving style of the car.

The principle of action of shock absorbers is based on the creation of increased resistance to rocking of the body due to the forced flow of the shock-absorbing fluid through small flow sections in the compression and recoil valves. The telescopic hydraulic suspension strut (TGAS) is the main unit of the front and rear suspensions and combines a group of parts in which the hydraulic shock absorber mounted in the rack serves as a damping element. TGAS front suspension, in particular, provides its reliable stability at significant speeds, damping of rhythmic vibrations of the front axle, smoothness and comfort [Vaysman Ya.M. et al. My car is a Lada. - M., Transport, 1978, - S.133-134. Cars "Lada". Descriptive Part, ed. Vershigora V.A., ed. 3. - M., Transport, 1977, - S.50-51].

Since the design of the recoil valve devices as part of the front TGAS in different modifications of domestic cars is almost the same [Zhiguli VAZ-2103, -2106 cars and their modifications. Vershigora V.A. et al. - M., Transport, 1987, - S.104-107], as a prototype, the TGAS device used in the VAZ-2108-2110 Standard cars [VAZ-2108, VAZ-2109 automobiles. Multicolor album / G.K. Mirzoev et al. - M., Mechanical Engineering, 1989, - C 54-55. Front suspension strut (Sheet 26)] to improve the smoothness of the car without loss of control when changing the profile of the road surface, containing in its design a recoil valve, consisting of a recoil valve nut, a spring placed on the nut between the plate and the nut protrusion, compressed to a predetermined the distance between the turns of the spring, with the disks and the throttle plate of the recoil valve, and the nut of the recoil valve is rigidly connected to the piston rod (the piston assembly with the valves is attached to the rod with a nut, which is tightened with a moment 0.12-0.16 Nm and counter). During the recoil course, pressure is created above the piston, and vacuum under the piston. Depreciation fluid from the over-piston space, overcoming the resistance of the bypass valve spring, bends the outer edges of the recoil valve discs and flows into the lower part of the cylinder.

The disadvantages of the design of the prototype should include the fact that:

- the adjustment of all known standard designs of the front THAC vehicle at the factory is reduced to a fixed setting, in particular, the force of pressing the spring to the plate with a recoil valve nut suitable for the average type of road surface;

- the wear of the piston and cylinder parts of the TGAS leads to a deterioration of the shock absorber, a decrease in the recoil force of the valve, an increase in the flow of the damping fluid through the channels of the recoil valve, and the restoration of the damping capacity is associated with the need to disassemble, repair, replace, or adjust the pressure of the spring against the plate by workshop conditions, which entails material costs and loss of time;

- mobile adjustment of the stiffness of the front hydraulic shock absorbers to match the driving style in the design of the TGAS device is not possible due to stem unfolding after rack assembly in two places and can only be carried out during disassembly and overhaul in order to increase (or decrease) the TGAS recoil force.

We first proposed the recoil valve of the front hydraulic shock absorber of the car, with the help of which the stiffness of the front TGAS is regulated during operation without disassembling the rack in the workshop, the adjustable structural elements of which are shown in Figure 1, where:

1 - nut;

2 - persistent nut.

The recoil valve is a structure, the lower part of the nut (1) in which, with a cylindrical thread on the inner surface for screwing onto the stem, is made cylindrical with a thread on the outer surface and is additionally equipped with a thrust nut (2), the diameter of the inner cylindrical surface of which and the thread on it corresponds to the outer diameter and thread of the nut (1) for their threaded connection, and the outer surface of the thrust nut (2) is a cylinder, the outer diameter of which is larger than the outer diameter of the spring, constant on the outer cylindrical surface of the nut (1), passes into a cone, in which the lower base formed pins, corresponding openings in the holder compression valve.

The operation of the recoil valve is illustrated in Figure 2 (A, B), where:

1 - holder of the compression valve;

2 - persistent nut;

3 - a nut;

4 - spring;

5 - plate;

6 - a washer of a nut;

7 - disk;

8 - throttle disk;

9 - a piston;

10 - piston assembly with recoil and bypass valves;

11 - cylinder;

12 - housing telescopic hydraulic suspension strut;

13 - piston rod;

14 - compression valve.

The device operates as follows (Fig. 2 A, B): the piston assembly with recoil valves and bypass valves (10) are adjusted without dismantling the housing of the TGAC rack (12) by pressing the piston (9) rod (13) moving inside the cylinder ( 11) until it stops in the clip (1) of the compression valve (14). The rod (13) is rigidly connected by a thread with a nut (3), which, in turn, is connected by a cylindrical thread on the outer surface with a thrust nut (2). If the thrust nut pins (2) get into the holes of the compression valve cage (14), i.e. fixation of the thrust nut (2) in a stationary state relative to the nut (3) rotating together with the stem (13), with further screwing in or out of the stem (13), the distance between the poppet (5) of the recoil valve against which the upper edge of the spring rests (4) ) the recoil valve and the upper end of the thrust nut (2), the outer diameter of which is larger than the outer diameter of the spring, against which the lower edge of the spring (4) of the recoil valve abuts (i.e., compresses or straightens it), which is equivalent to adjusting the stiffness of the front THACs according to the driving style auto Beal.

An increase in the stiffness of the spring (4) of the recoil valve leads to an increase in the recoil force of the piston rod (13) of the piston (9) of the recoil valve and an increase in the pressure of the suspension liquid above the piston, and under the piston, to discharge; at the same time, the plate (5) of the recoil valve increases the pressure on the disk (7) of the recoil valve through the throttle disk (8), reducing the permeability of the shock-absorbing fluid through it and ensuring reliable stability of the car on roads with a different nature of the coating, damping the rhythmic vibrations of the front axle, shortening the length stopping distance. A decrease in the stiffness of the spring (4) of the recoil valve leads to a decrease in the recoil force and, consequently, to a decrease in the pressure of the suspension liquid above the piston (9), while the plate (5) of the recoil valve reduces the pressure on the disk (7) of the recoil valve through the throttle disk (8 ), increasing the permeability of the amortization fluid through it, thereby ensuring a smooth ride, reducing drifts at higher speeds, rocking the car body relative to the roadway, increasing the length of the braking distance, and comfort.

The proposed design eliminates the disadvantages of the prototype listed above, since TGAS with an adjustable recoil valve provides:

- the ability to change the recoil rigidity in the range of 5.0-1000 kg and more in a short period of time (lowering the piston rod and rotating it with a special key for several minutes, changing the position of the nut relative to the thrust nut after fixing the pins of the latter in the holes of the compression valve holder) directly on the way, “adjusting” the stiffness of the front hydraulic shock absorbers to the driving style of the car, taking into account changes in the profile of the road surface and any other road situations;

- achieving long-term operation of the car even when the shock absorber parts are worn out, in which it is enough to change the position of the nut relative to the thrust nut in order to bring the shock absorbers into working condition (increase or decrease the flow of shock-absorbing fluid through the channels of the recoil valve, reduce or increase the recoil force of the valve) without disassembling, repair or replacements in a workshop;

- mobile adjustment of the stiffness of the front hydraulic shock absorbers to match the driving style of the TGAS device design, increasing the efficiency of shock absorption for both front-wheel drive and classic and other cars, the ability to bring comfort to the level of demand of car consumers;

- a comfortable ride at any time of the year and, at the same time, a significant economic effect - an increase in the life of the shock absorber without replacing the TGAS in overhaul conditions compared with cars lacking a recoil valve adjustment;

- timely flow of amortization fluid into the zones of the working piston, regardless of its fluidity, determined by the ambient temperature, longer service life compared to standard designs of the front THAC vehicle with a fixed setting at the factory using the same type of amortization liquids.

Claims (1)

The recoil valve of the front hydraulic shock absorber of the car, including a nut with a thread on the inner surface for screwing onto the rod, spring, plate, washer, disk, throttle disk, characterized in that the lower part of the nut is cylindrical with thread on the outer surface and is additionally equipped with a thrust nut, the diameter of the inner cylindrical surface of which and the thread on it correspond to the outer diameter and thread of the nut for their threaded connection, and the outer surface of the thrust nut is a cylinder PDR, the outer diameter greater than the outer diameter of the spring, turning into a cone, in which the lower base formed pins, corresponding openings in the holder compression valve.