SK13292001A3 - Leaf spring suspension of rear axle - Google Patents

Abstract

The mounting of the rear spring leaf spring according to the invention is characterized in that the rear end of the leaf spring (1) is embedded in a bed (2) which is rigidly connected to the longitudinal arm (3), the upper contact surface of the leaf spring (1) is supported on the transverse beam (4) and the leaf front the spring (1) is mounted in the caliper (5). Another characteristic the feature is that the longitudinal axis of the leaf spring (1) of the animal with the vehicle longitudinal axis (O) the angle (α) = 5 ° to 45 °.

Description

Technical field

The invention relates to the mounting of a leaf spring of the rear axle of vehicles.

BACKGROUND OF THE INVENTION

There are several, sometimes contradictory requirements for the design of the rear suspension of vehicles. First of all, it is necessary to ensure correct steering and positioning of the wheels against the road or terrain for efficient transmission of driving, guiding and braking forces by means of tires at various

occurring loads. Furthermore, there are requirements for low production costs, minimal maintenance, small unsprung masses, required clearance, vibration damping and, if possible, component and technological unification.

Suspension is an important function of the rear axle suspension. The most widely used are springs with coil and leaf springs, which give very good functional results.

Among the design solutions using leaf spring, the solution according to the invention (AO in

ČSSR č. 242 238 from the same author as the present invention). suspension

The rear axle according to the invention comprises a longitudinal arm which is connected at one end to the housing of the wheel part and the other end connected to the crossmember, further has a leaf spring which is supported by the rear part in the cavity of the longitudinal arm and front by the caliper.

f r

-2We know the design of the rear suspension, even if they solve the function problem, have a number of design flaws. These include, for example, that the coil springs extend into the useful space of the vehicle, reducing the space between the wheel arches and / or the floor height, which is particularly disadvantageous for commercial vehicles. In most cases, these solutions do not allow an optimum force flow from the wheel-to-road contact to the vehicle structure.

Although the invention according to AO ČSSR no. 242 238 eliminates the above-mentioned disadvantages, its advantages cannot be utilized in vehicles with several rear axles placed close together, for example two tandem axles.

Summary of the Invention

These drawbacks are greatly reduced or eliminated by the structural design of the rear axle leaf spring mounting according to the invention. The invention is based on the fact that the rear end of the leaf spring is mounted in a seat which is fixedly connected to the longitudinal arm. Its longitudinal axis is parallel to the longitudinal axis of the vehicle. The upper contact surface of the leaf spring is supported on the crossbeam and the front part of the leaf spring is supported in the yoke.

A further possibility of receiving the leaf spring of the rear axle according to the invention is based on the leaf spring clamping with the longitudinal axis of the vehicle at an angle and in the range of 5 ° to 45 °.

Advantages of the leaf spring arrangement according to the invention include, in particular, that it does not interfere with the useful space and also makes it possible to substantially increase the vehicle clearance while reducing the vehicle floor height, which is one of the most important parameters of commercial vehicles.

-3The most important advantage arises from the possibility of depositing leaf r

the springs so that the animal is at an angle with the longitudinal axis of the vehicle. This makes it possible to use leaf springs also on vehicles with several rear axles placed close together, for example on two rear axles in a tandem arrangement.

The suspension according to the invention also provides better axle guidance with respect to the spring-loaded suspension which simultaneously guides the axle.

Overview of the figures in the drawing

In FIG. 1 is a schematic view from the inside of a vehicle of an exemplary left rear axle according to the invention.

In FIG. 2 shows a schematic plan view of an exemplary embodiment of two rear axles disposed one after the other using

leaf springs which are at an angle to the longitudinal axis of the vehicle and.

DETAILED DESCRIPTION OF THE INVENTION

The embodiment of the leaf spring 1 of the rear axle according to the invention shown in FIG. 1 is characterized in that the rear end of the leaf spring 1 is supported in a seat 2 which is

The upper contact surface of the leaf spring I is supported on the crossbeam 4 and the front part of the leaf spring I is mounted in the yoke 5.

A further exemplary embodiment of the leaf spring and rear axle bearing according to the invention is shown in FIG. 2. These are two rear r

close axles. The longitudinal axes of the leaf springs i, the rear ends of which are housed in beds 2 which are fixedly connected to r r

-4- '·. ·. The longitudinal arms 3 form an angle [alpha], which in the present case is [alpha] = 15 [deg.], With the longitudinal axis of the vehicle. The upper contact surfaces of the leaf springs 1 rest on the crossbars 4 and the front parts of the leaf springs are mounted in the stirrups 5, as in the previous example.

í t

The angle between the longitudinal axis of the leaf spring i and the longitudinal axis of the vehicle O is selected in particular cases according to the design possibilities given by the chassis construction elements and other parts mounted on the underside of the vehicle.

Industrial usability

The invention can be advantageously used in particular in the construction of motor vehicles in which it is expedient to achieve the lowest possible floor height at an acceptable vehicle clearance. This applies in particular to commercial vehicles.

The mounting of the rear axle leaf spring in accordance with the invention does not require any space above the vehicle floor, which is generally necessary in known coil spring solutions or a sophisticated torsion bar suspension mechanism.

Claims (4)

PATENT CLAIMS 1. Rear axle leaf spring mounting, characterized in that the rear end of the leaf spring (1) is supported in a seat (2), r which is rigidly connected to the longitudinal arm (3), the upper contact surface of the leaf spring (1) being supported on the crossbeam (4) and the front part of the leaf spring (1) being mounted in the yoke (5). Rear axle leaf spring mounting according to claim 1, z characterized in that the longitudinal axis of the leaf spring (1) forms an angle (α) of 5 ° to 45 ° with the longitudinal axis (0) of the vehicle. Rear axle leaf spring mounting according to claim 2, characterized in that the surfaces of the successive transverse cross-sections of the leaf spring (1) have different values given by the desired spring characteristic. Rear axle leaf spring mounting according to claim 1, characterized in that the pivot point of the caliper (5) is offset relative to the bearing surface of the leaf spring (1) so that a pressure is exerted permanently by the leaf spring into the seat (2).