RU205597U1 - SHEET SPRING OF VEHICLE - Google Patents

Abstract

The utility model relates to mechanical engineering and concerns the design of leaf springs of vehicles, for example, automobile and railway equipment. The task of the utility model is to impart increased reliability and durability to the leaf spring under shock loads. The technical result of the utility model is to ensure its increased rigidity at a high deformation rate with simultaneous Reducing material consumption and weight. The specified problem is solved by the fact that in a leaf spring of a vehicle containing a package of sheets of the same width, fastened with clamping clamps, each of the inner sheets of the package has an inner closed cavity in which an elastic sealed shell filled with a non-Newtonian fluid is placed.

Description

The utility model relates to mechanical engineering and concerns the design of leaf springs of vehicles, for example, automobile and railway equipment.

Known leaf spring with a clamping clamp [USSR author's certificate No. 289952, IPC F16F 1/18, 1970], in which the bracket is made curved along the profile of the compression side of the spring sheet.

The disadvantages of this design of the leaf spring are that the clamp has insufficient strength due to the work of the clamping bolt of the clamp for shear, and also due to the fact that the ends of the clamp bracket, working in this sheet in tension, are weakened by the holes and jumpers located near holes.

Known leaf spring of a vehicle containing a package of sheets of the same width, fastened with clamping clamps [RF patent No. 2037688, IPC F16F 1/18, 1995 - prototype]. Each clamp has a bracket with a section made bent along the profile from the compression side of the spring sheet, from the extension side of the root spring sheet, the bracket has shoulders made perpendicular to the side sections of the clamp bracket, and the ends of the bracket are bent relative to the shoulders at an angle of 90 ° and through the spacer sleeve are pulled by the clamping bolt and nut.

The disadvantage of the known leaf spring is the weak dependence of its elastic properties on the rate of deformation.

In practice, it is often necessary to use materials for parts of leaf springs of variable stiffness, depending on their rate of deformation, for example, for fastening containers with explosive goods to reduce the likelihood of an explosion in a collision of trains in a railway accident; when loading heavy-duty dump trucks with rotary excavators when large masses of rock fall into the body from a height, etc.

At the same time, an additional increased stiffness of the leaf spring is also required to prevent accidents at nuclear power plants that may arise due to the fall of heavy objects, for example, containers with spent fuel elements - assemblies of fuel elements of power reactors, on the building structures of the building, since the leaf spring must effectively slow down the falling the object and, with an appropriate choice of its rigidity, depending on the impact speed, to provide a condition under which the force impact on the foundation, for example, on the interfloor overlap of the NPP building, does not exceed a sufficiently low permissible level; as well as in many other cases.

The task of the utility model is to provide the leaf spring with increased reliability and durability under shock loads.

The technical result of the utility model is to ensure its increased rigidity at a high deformation rate with a simultaneous decrease in material consumption and weight.

This problem is solved by the fact that in a leaf spring of a vehicle containing a package of sheets of the same width, fastened with clamping clamps, each of the inner sheets of the package has an inner closed cavity in which an elastic sealed shell filled with a non-Newtonian fluid is placed.

Since each of the inner sheets of the leaf spring package has an inner closed cavity in which an elastic sealed shell filled with a non-Newtonian fluid is located, the stiffness of the leaf spring will substantially depend on its deformation rate. It is known that non-Newtonian fluids can change their structure and viscosity depending on pressure or temperature fluctuations, and at a high deformation rate they can generally turn into a very hard and durable material. Thus, as the rate of deformation, which usually occurs under shock loads, increases, the stiffness of the sheet of the package increases, and therefore the resulting stiffness of the leaf spring of the vehicle. This solves the problem of increased reliability and durability of the leaf spring under shock loads.

Figure 1 shows the appearance of a leaf spring of a vehicle; Fig. 2 shows a section A-A of Fig. 1.

In the external view of Fig. 1 of the proposed leaf spring, the numbers indicate: 1 - clamping clamp bracket, 2 - side section of the clamp bracket, 3 - additional shoulder of the clamp bracket, 4 - end of the clamp bracket, 5 - lateral section of the spring sheet from the side of sheet stretching, 6 - clamping bolt, 7 - spacer sleeve, 8 - nut, 9 - inner sheets of the leaf spring package, 10 - inner closed cavities of the inner sheets of the package, into which elastic sealed shells filled with non-Newtonian fluid are placed.

The shackle of the clamping yoke 1 in Fig. 2 is bent in the shape of the compression side of the spring sheet and is riveted to the outer spring sheet by a rivet. The side section of the clamp of the clamp 2 and the additional shoulder are located one to the other at right angles. The end of the clamp shackle is located at a 90 ° angle to the additional shoulder. The additional shoulder of the clamp shackle is located opposite the lateral section of the leaf spring from the side of tension.

A tie bolt is threaded through the holes at the ends of the brace, on which the spacer sleeve 7 is fitted, secured with a nut 8. With this design, the clamping bolt is loaded in tension, since the main load during the interaction of the sprung and unsprung parts of the vehicle is taken on by the additional shoulders 3 of the clamp bracket. In this case, the jumpers at the ends of the clamp bracket work for bending, not being a weak point in strength, which makes it possible to reduce the section of the clamp bracket and also reduce its weight.

An elastic sealed envelope (not shown) filled, for example, with a dilatant non-Newtonian liquid d3o developed by one of the British companies, is placed in the inner closed cavity 10 at the inner sheets of the leaf spring package. Its density is ρ = 0.5 ... 0.65 g / cm ³ . In a non-Newtonian liquid d3o, viscose, a cellulose derivative, plays the role of a liquid phase; a liquid polymer is a solution of cellulose xanthate in dilute NaOH, obtained mainly from wood raw materials. The solid phase is polyboromethylsiloxane nanoparticles - a complex boron-organosilicon polymer [see. website: www.d3o.coml.

The presence of a non-Newtonian fluid in the inner cavity of the spring sheets provides an increased spring rigidity at a high deformation rate, and as a consequence, increased reliability and durability of the vehicle under shock loads. An additional effect is the reduction in spring weight. Since the outer sheets of the leaf spring package are made of structural, for example, 60S2G, 65S2VA, 60S2N2A, 50KhFA - nickel-containing, chrome-vanadium and other steel grades, and each of the inner sheets 9 of the leaf spring package has an inner closed cavity 10, in which an elastic sealed shell is located filled with a non-Newtonian liquid having a density almost an order of magnitude lower than the density of structural steel grades of the sheets of the package, this reduces the material consumption and the mass of the leaf spring.

Claims (1)

A leaf spring of a vehicle containing a package of sheets of the same width, fastened with clamping clamps, characterized in that each of the inner sheets of the package has an inner closed cavity in which an elastic sealed shell filled with a non-Newtonian fluid is placed.

Images