RU2236955C2 - Truck suspension (two versions) - Google Patents

Abstract

FIELD: transport engineering; suspensions of cross-country trucks.

SUBSTANCE: proposed truck suspensions contains longitudinal singlesemielliptic springs arranged in hangers secured on frame. Springs are rigidly connected with axle in middle part, while rear part is provided with sliding support for horizontal longitudinal travel of spring. Two pairs of hydropneumatic springs with built-in valves of shock absorbers are hinge connected by lower ends with axle, and by upper ends are rigidly secured on frame by hangers. Posts and rods of lateral stabilizer are hinge secured on axle and frame. Frame is provided with tubular crossmember on which torque rod is hinge connected by one end. Other end of torque rod is hinge secured on upper part of axle reduction gear. Longitudinal, cross and part of vertical forces are taken up of longitudinal single-eye semielliptic springs. The rest of vertical forces is taken un by hydropneumatic springs with built-in valves of shock absorbers. Lateral stabilizer decreases lateral heeling of truck owing to rigidity of tie-rod.

EFFECT: increased energy capacity of suspension at high strokes, improved reliability at sufficiently high smoothness of running.

3 cl, 4 dwg

Description

The invention relates to the field of transport engineering, and in particular to the suspension of off-road trucks.

Known suspension of a car bridge containing a transverse spring, the middle part of which is connected with the car frame, and the ends are placed in grooves made in the frame with the possibility of vertical movement and fixation, vertically mounted elastic elements, the lower ends of which are connected to the rear axle, a power hydraulic cylinder and latches ( USSR AS No. 1572836, M.C. B 60 G 11/46, Bull. No. 23, 06.23.90).

Also known is the rear dependent suspension of the vehicle, selected as the closest analogue, containing a guide device made in the form of longitudinal leaf springs, longitudinal beams rigidly connected to the bridge beam and bearing elastic elements made in the form of pneumatic elements located at the front and rear of the wheels at their ends spring (A.S. of the SSSSR No. 662382, M.cl. B 60 G 11/46, Bull. No. 18, 05/15/79).

But this suspension has a low power consumption, low travel and low located unprotected parts.

Problem to be solved: ensuring high energy intensity at long suspension travels, as well as suspension reliability with a sufficiently high smoothness.

This problem is solved in that the known vehicle suspension, comprising a guide device, elastic elements, shock absorbers, made in the form of longitudinal leaf springs rigidly connected to the bridge by the middle part, is additionally equipped with anti-roll bars consisting of struts and rods pivotally mounted on the bridge and the frame, while the elastic elements have built-in damper valves, are made in the form of pairs of hydropneumatic springs, pivotally connected by the upper ends with rigidly fixed to the bracket frame mi, and the lower ends are pivotally connected to the bridge, and the springs are single-beam and have a sliding support at the rear, while the suspension can be equipped with a reaction rod pivotally mounted at one end on the upper part of the bridge gearbox and the other on the tubular cross member of the frame.

Distinctive features of the proposed car suspension from the one closest to the one indicated above are single-sprung springs with a sliding support in the rear, which allows to perceive longitudinal, transverse and part of the vertical forces, the presence of anti-roll bars consisting of struts and rods pivotally mounted on the bridge and the frame, which serve to reduce the lateral rolls of the car, the implementation of the elastic elements in the form of pairs of hydropneumatic springs with integrated shock absorber valves, which allows sprinimat remainder of the vertical forces, and in combination use of three elastic elements on the wheel load sensing by 1/3, provides greater energy intensity inventive suspension. The presence of a reactive rod prevents the twisting of the bridge from the occurrence of traction and braking moments on the wheel. Placing the suspension elements between the frame and the bridge of the car allows to achieve greater security of the suspension parts and, as a result, the reliability of the suspension with its sufficiently high smoothness.

The proposed car suspension is illustrated by the following drawings:

figure 1 - car suspension (option 1), front view;

figure 2 is the same side view;

figure 3 - car suspension (option 2), rear view;

figure 4 is the same side view.

The proposed car suspension contains longitudinal single-axle semi-electric springs 1 located in brackets 2 mounted on the frame 3. The springs 1 are rigidly connected in the middle part with the bridge 4, and their rear part has a sliding support, providing horizontal longitudinal movement of the spring.

Two pairs of hydropneumatic springs 5 with integrated damper valves, the lower ends are pivotally connected to the bridge 4, and the upper - with brackets 6 rigidly fixed to the frame 3.

On the bridge 4 and frame 3, the struts 7 and the rods 8 of the anti-roll bar are pivotally mounted.

The frame 3 has a tubular cross member 9 on which a reactive rod 10 is pivotally mounted at one end. The other end of the reactive rod 10 is pivotally attached to the upper part of the gearbox of the bridge 4.

Longitudinal, transverse and part of the vertical forces perceive longitudinal single-ear semi-electric springs 1. The remaining part of the vertical forces perceive hydropneumatic springs 5 with integrated damper valves. The anti-roll bar reduces the lateral roll of the car due to the stiffness of the rod 8.

The high energy intensity of the claimed suspension consists in the use of three elastic elements per wheel, perceiving 1/3 of the load. This is also the survivability of the car suspension. If one of the hydropneumatic springs 5 fails, the elastic characteristic of the suspension will also decrease by 1/3.

The spacing of the spring gauge, the installation of hydropneumatic springs on the bridge with size B at the maximum possible spring track A of the springs 1 reduce the bending force on the beam of the bridge, while the line “a” of the axis of the hydropneumatic spring 5 is close to the center of the contact spot B of the wheel. Since 2/3 of all the effort falls on the spring track B, the use of serial beams with a slight gain is allowed.

Without using such a design, it is impossible to provide a dynamic coefficient k _d = 3.5-4 of the suspension in trucks without significant reinforcement of the bridge beam.

Hydropneumatic springs have a progressive characteristic, which affects the stiffness of the vehicle's suspension in various positions of the bridge. When the wheel moves up to full compression of the suspension, the stiffness increases. This characteristic improves the smoothness of the car with a significant coefficient of dynamics k _d = 3,5-4.

It is impossible to achieve an acceptable ride and high energy intensity without progressive elastic characteristics of the suspension. A smooth ride is achieved by increasing the overall suspension travel.

The inventive suspension of the car has a high energy intensity at high speeds, as well as high reliability with its sufficient smoothness.

The car suspension can be performed on standard equipment using modern materials and technologies.

Claims (2)

1. Car suspension, comprising a guide device, elastic elements made in the form of longitudinal leaf springs rigidly connected by a middle part with a bridge, characterized in that it is additionally equipped with anti-roll bars consisting of struts and rods pivotally mounted on the bridge and frame, while the elastic elements are made in the form of pairs of hydropneumatic springs, have built-in damper valves, and are pivotally connected by their upper ends with brackets rigidly fixed to the frame, and by the lower ends are pivotally connected to the bridge, and the springs are made odnosushnymi and have a sliding support in the rear. 2. A vehicle suspension comprising a longitudinal leaf springs rigidly connected by a middle part to a bridge, a guide device, elastic elements, characterized in that it is additionally equipped with anti-roll bars consisting of struts and rods pivotally mounted on the bridge and frame, a reactive rod pivotally attached at one end to the top of the gearbox of the bridge, and the other on the tubular cross member of the frame, while the elastic elements are made in the form of pairs of hydropneumatic springs, have built-in Pan absorbers, and pivotally connected to upper ends rigidly secured to the frame bracket, and lower ends pivotally connected to the axle, wherein the springs are made odnoushkovymi and have a rear sliding support.

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