SU1521632A1 - Vehicle - Google Patents

Abstract

This invention relates to freight and tipping vehicles. The purpose of the invention is to increase reliability and durability. The vehicle contains a frame 1, a body 2 and a hydraulic cylinder 3 lifting the body 2 relative to the hinge 4 of the rear part of the frame 1. The body 2 interacts with the frame 1 in the front axle 7 zone through the main elastic supports 5. With the frame 1 in its middle and rear parts hinged a rear suspension guide 9 is connected. Above the attachment point of the front part 8 of the guide means 9 are mounted additional elastic supports 6. Stiffness basic and additional supports are interconnected ratio C ₂ / C ₁ = B / ^A. L ² / ^A. L ₂ , where C ₂ and C ₁ - the rigidity, respectively, of the main and additional elastic supports

A and B - distance, respectively, from the center of mass of the sprung part of the car to the axis of the front and rear axles

L ₂ and L ₁ - distance, respectively, from the body pivot hinge to the main and additional elastic supports

A is the distance from the rear attachment point of the rear suspension guide to the rear axle axis. 2 hp f-ly, 3 ill.

Description

five

N5

Ipuft

FIELD OF THE INVENTION The invention relates to vehicle engineering, and more specifically to freight and dumping vehicles for the carriage of goods.

The aim of the invention is to increase reliability and durability by reducing the load on the carrier system by eliminating the frame in the area covered by its body while reducing the bend of the latter.

FIG. 1 shows the proposed device implemented in a mining truck; in fig. 2 - power circuit interaction of the body and frame; in fig. 3 - the proposed device, implemented on a truck or construction. Truck-dump.

The cpeActBO transport, mainly a dump truck, contains frame 1, body 2 and hydraulic cylinder 3 body lifts 2, Body 2 is fixed in the rear part of frame 1 by means of hinge 4 and interacts with frame 1 through transport 5 and 6 additional elastic supports. The main supports 5 are installed in the area of the front axle 7, and the additional supports 6 are above the attachment point 8 of the front part of the rear suspension guide device 9, which is pivotally connected to the frame 1 in its front and rear parts. For trucks and construction dump trucks, in which the rear suspension guide 9 is a spring (see Fig. 3), an additional support 6 is installed above the point 8 of the front end of the spring to the frame 1. In front of the body 2 the bracket 10 is mounted, mated with the main elastic supports 5.

The main 5 and additional 6 elastic supports can be fixed both on the body 2 and on the frame 1. The fixing of the elastic supports on the frame 1 eliminates the need to lift additional load (supports 5 and 6) when tipping the body 2, However, during operation, the frame 1 perceives significant loads causing concentration of high stresses at the points of attachment of the supports. Therefore, the installation of supports 5 and 6 on the body 2 is more preferable.

To avoid local bending; the frame 1 of the hinge t of the body 2 is located above the attachment point to region 1 of the rear suspension guide 9.

In turn, in order to avoid bending of the frame 1 in the zone of its overlap by body 2, it is necessary that the reaction Rv from body 2 be equal to the reaction R from the rear suspension guide 9. This condition is fulfilled with the following ratio of stiffness C and C, basic 5 and additional 6 supports:

Sa

with;

s

a a t

(one)

where a and b are the distances from the center of mass of the sprung part of the vehicle to the axis of the front and rear axles, respectively; 2. and 1, - from turning distance

body hinge to the main and additional

elastic supports, respectively;

A is the distance from the rear attachment point of the rear suspension guide device to the axis of the rear axle.

The relation (1) follows from the equilibrium conditions of the body 2 on the frame 1 (Fig. 2). When it was withdrawn, it was assumed that the frame and bodywork are absolutely bending stiff.

The choice of stiffness characteristics of the supports can be carried out by any of the known methods (changing their height, cross-sectional area, configuration, physical and mechanical properties, etc.).

The vehicle operates as follows.

In the transport position, the body 2 interacts with the frame 1 through the hinge and elastic supports 5 and 6, In the empty state, the reaction Rq from the rear suspension guide 9 and the reaction R, from the body 2 in the additional support 6 will not be balanced. However, the resultant of these efforts is so insignificant that it practically does not affect the reliability and durability of both frame 1 and body 2.

After loading the body 2 reactions RI and R, in supports 5 and 6 as a result of the choice of their stiffness characteristics

5-1

according to relation (1), they will be distributed in such a way that the reaction R from body 2 in the additional support 6 fully compensates for the response K from the rear suspension guide 9. 8, the reaction R in the main support 5 is balanced by the response from the front wheels of the car, and the reaction in the body 2 hinge - by the reaction from the rear suspension. Therefore, frame 1 will not be subjected to bending loads from body 2.

Loading and unloading the vehicle body is carried out in one of the known ways.

Thus, the introduction of additional supports between the frame and the body, their location above the attachment point of the front part of the rear suspension guide device on any of the mating surfaces of the frame or body and the choice of support stiffnesses according to relation (1) reduces the load of these elements the existing car system and thus its reliability and durability.

Claims (3)

1. A vehicle is a dump truck containing a frame mounted on hangers and a body articulated with a frame in its rear part with the ability to interact with the frame in the front axle area through the main elastic supports, while the rear suspension guide device is articulated with the frame in its middle and rear parts, about f l and so that, in order to increase reliability and durability by reducing the load on the carrier system by eliminating the bending of the frame in the area blocked by its body while reducing and bending the latter, between the frame and the body of the attachment point of the front part of the rear guide device - mounted therein suspension additional elastic support, wherein the hardness of basic and additional poles SA and Cn are coupled together by the following relationship: Sa WITH. where a and b b a a l the distance from the center of mass of the sprung part of the car to the axis of the front and rear axles, respectively; and 1 is the distance from the body pivot hinge to the main and additional elastic supports, respectively; A is the distance from the rear attachment point of the rear suspension guide device to the rear axle. that 2. Vehicle under item 1, characterized in that the elastic olors are mounted on a frame. 3. Vehicle under item 1, characterized in that Elastic supports are mounted on the body. (fruff.2 (rig. 3