DE636789C - Support leaf spring, especially for motor vehicles - Google Patents

Description

The leaf springs of motor vehicles are generally associated with the vehicle frame connected by articulated links, which have the disadvantage that they displace the vehicle axles from Ver-S allow the frame in terms of the longitudinal direction of the vehicle.

In order to avoid these joint links and the disadvantages associated with them, is already has been proposed, the springs from several mutually displaceable parts to form, the outer ends of which are hinged to fixed points on the frame.

In these known devices, the semi-springs have rigid displaceable parts, see above that the effective, free and elastic part of the half-spring is considerably reduced.

The purpose of the invention is to provide an additional elasticity due to the displacement of the half-springs to compensate for the reduced elasticity of the half-springs.

It relates to a support leaf spring, especially for motor vehicles, the The spring consists of two parts, the inner ends of which are mounted such that they can be pushed against each other. According to the invention is between the inner mutually displaceable ends of the Spring parts switched on an elastic intermediate member. The inner ones that can be pushed one against the other Ends of the spring parts are expedient with shock absorbers, especially hydraulic ones Shock absorbers connected. For this purpose, these ends are, for example, in the housing a hydraulic shock absorber and with pistons sliding in cylinder chambers Mistake. The outer ends of the spring parts are advantageously provided with movable slide rails connected, which allow vertical displacements of the spring ends, but prevent longitudinal and transverse movements of the same.

Embodiments of the subject matter of the invention are schematically shown in the drawing shown, namely show

Fig. Ι a longitudinal section of an inventive Leaf spring,

Fig. 2 is an elevation of a suspension according to the invention in connection with a fluid damper,

3 shows an explanatory diagram for FIG. 2,

Fig. 4 is an elevation, partly in section, of another embodiment;

5 shows a partial section of a further embodiment,

Fig. 6 is a front view of a further embodiment.

The support leaf spring shown in Fig. 1 consists of two spring parts composed of individual lamellae 25 ¹ , 25 ^s , between which additional elastic intermediate members 51 ¹ , 51 ² are connected so that the spring parts move against each other and directly without the interposition of joint members on fixed Points of the vehicle frame can be articulated. The additional intermediate links thus counteract the displacement of the spring parts 25V25 ² , whereby the elasticity of the suspension is increased regardless of the inherent elasticity of the displaceable spring parts.

The two spring parts 25 ^ 252 are slidably held in a common sleeve 50, with additional compression springs 51 ¹ J 51 ^{2 being connected between the spring ends and an intermediate wall 51 3} .

These mutually displaceable spring parts 2s ^1, 25 ^s may be attached directly to the frame at A and A '.

This arrangement enables mechanical damping of the vibrations in a simple manner, with sliding rollers or balls 52 being used ^{between the sleeve and the spring parts 2 5 1} , 2 5 ^2.

In order to limit the longitudinal displacement of the spring parts 2 5 ¹ , 2 5 ² , these can be equipped with stops 53 which abut the bent end edges of the sleeve 50.

Instead of the spring parts 25 *, 25 ^s to connect a mechanical shock absorber, a hydraulic shock absorber 54 can be used (Fig. 2).

This shock absorber consists of a piston 55 of large diameter, which is lengthened by a piston 56 of significantly smaller diameter. The piston 5 5 is connected to one of the spring parts, for example 2S ¹ , by a lever 57.

Valves 55 ^1,. 55 ² regulate the circulation of the liquid.

The device acts according to the scheme of FIG. 3, with the full lines Rest position, the position when the spring is depressed, shown in dashed lines is.

In the device according to FIG. 4, a weak spring 51 is accommodated in the sleeve 50. Ball or roller bearings are arranged between the spring part 25 ¹ and the sleeve Sp, while the ends of the spring parts can be connected to mechanical or hydraulic shock absorbers 100.

Two semi-axes ιοί ¹ , ιοί ² are inserted between the sleeve 50 and the ends of the springs. They are connected to the sleeve by means of sliding guides or elongated holes. This arrangement makes it possible that the outer ends of the levers ιοί ^1, 101 ^2, to be described at the deflection of the spring members 2s ^1, 25 ^s can move vertically instead of circular arcs about its bearing axis to the sleeve 50th The. Spring 51 can also be omitted.

In the embodiment according to FIG. 5, the sleeve 50 forms a pump housing, while the inner spring ends are designed as pistons sliding in this housing. In addition, an additional piston 111 ¹ , in ^{FIG. 2} , is arranged on each spring part 25 ¹ , 25 ^s , which piston moves in a cylinder 112 ¹ , 112 ^{2 of a} larger diameter. Valves 114 ¹ , ΙΓ4 ² regulate the circulation of the brake fluid of the master cylinder 113, whereby the vibrations of the springs 2 5 ¹ , 2 5 ^{2 are} damped.

Fig. 6 shows two spring parts 2 5 ¹ , 25 ^s , which are held by a sleeve 50, which is hinged to the vehicle frame.

Each spring end 2 5 ¹ , 2 5 ² is connected to a slide rail 116 which is only vertically movable, so that neither displacements in the longitudinal direction of the vehicle nor in the direction of the wheel axles can occur. The vertical displacement of the rail is limited ^{by stops 116 1} , 116 ^2.

The joint 115 enables vibrations the sleeve 50 relative to the frame, thereby increasing the mobility of the suspension is increased while reducing the friction.

The rails 116 dive with certain movements in an oil bath 117. This oil rises as a result of the movements of the rails 116 in the height and lubricates the sliding surfaces.

^{The semi-axes ι ο ι 1} , ι ο i ² of FIG. 4 can be avoided by the arrangement according to FIG. 6.

Claims (4)

Patent claims: i. Supporting leaf spring, especially for motor vehicles, consisting of two spring parts, the inner ends of which are supported against one another so that they can be pushed together, characterized in that an elastic intermediate member (51) is connected ^{between the inner ends of the spring parts (25 1} , 2s ^{2) which can be pushed against one another.}
■ 2. support leaf spring according to claim 1, characterized in that the inner mutually displaceable ends of the spring parts (2s ¹ , 25 ² ) with shock absorbers, in particular, hydraulic shock absorbers (54 to 56) are connected. -3. Supporting leaf spring according to claim 1 and 2, characterized in that the inner gegeneinanderschiebbaren ends of the spring portions (25 ^1, 25 ²⁾ guided in the housing (50.113 ') of a hydraulic shock absorber and in Zylinderkammerri sliding piston (112 ^1, 112 ²⁾ (πι ¹ , in ² ) are provided no. 4. Support leaf spring according to claim 1 to 3, characterized in that the outer .Ends of the spring parts (25 ¹ , 25 ² J are connected to vertically guided slide rails (116). 1 sheet of drawings