RU242531U1 - Bottom segment of a dump truck - Google Patents

Abstract

The utility model relates to the field of transport engineering, namely to a dump truck body that can be used with large and heavy loads, for example, for transportation in connection with the construction of roads or tunnels, sand quarries, mines and in other similar places, in particular relates to a segment of the bottom of a dump truck vehicle. The technical result is achieved in that the bottom of the dump truck vehicle contains a flooring (1) and cross beams (3), on which a bed (4) and a body rotation eye (5) are mounted, connected to the flooring (1) by a rib (6), and also contains a mount for a hydraulic cylinder (7), at a distance from which a longitudinal beam (8) is mounted, made longer than the length of the mount for the hydraulic cylinder (7). An increase in the reliability of the bottom of the dump truck vehicle is ensured. 8 clauses, 3 figs.

Description

Field of technology

The utility model relates to the field of transport engineering, namely to the body of a dump truck, which can be used with large and heavy loads, for example, for transportation in connection with the construction of roads or tunnels, sand quarries, mines and other similar places, in particular, it relates to the segment of the bottom of a dump truck.

State of the art

The bottom of a dump truck is known to contain a flooring, a central rib and cross beams on which the supports and body rotation ears are installed, and also contains mounts for hydraulic cylinders [CN222832750U, published 06.05.2025].

The problem with the analogue is the low reliability of the bottom due to its premature weakening with subsequent fracture of the zones in the area of the body rotation ears, along the cross beams and the flooring.

The closest analogue is the bottom of a dump truck, containing a flooring, a central rib and cross beams on which the bedplates and body rotation ears are installed, connected at an angle to the cross member by a rib, and also contains mounts for hydraulic cylinders [CN222408050U, published 01/28/2025].

The problem with the closest analogues is the low reliability of the bottom due to its premature weakening with subsequent fracture of the zones in the area of the body rotation ears, along the cross beams and flooring.

Revealing the essence

The technical problem solved by the claimed utility model is the elimination of the shortcomings of analogues.

The objective of the utility model is to increase the reliability of the bottom of a dump truck.

The technical result of the claimed utility model consists in increasing the reliability of the bottom of a dump truck.

The specified technical result is achieved in that the bottom of the dump truck vehicle contains a flooring (1) and cross beams (3), on which a bed (4) and a body rotation eye (5) are installed, connected to the flooring (1) by a rib (6), and also contains a hydraulic cylinder mount (7), at a distance from which a longitudinal beam (8) is installed, made longer than the length of the hydraulic cylinder mount (7).

In one of the preferred embodiments, the longitudinal beam (8) is made shorter in length than the length of the support (4).

In one of the preferred embodiments, stiffening ribs (9) are located inside the cross beams (3) between them and the flooring (1).

In one preferred embodiment, holes are made in the stiffening ribs (9).

In one preferred embodiment, a transport hole is provided in the support (4).

In one of the preferred embodiments, a pin is installed in the rotation ear of the body (5) with the possibility of rotation.

In one preferred embodiment, the flooring (1) of the rear portion of the bottom segment is inclined relative to the longitudinal axis of the bottom. When considering the bottom as a whole, the flooring (1) of the rear portion of the bottom includes one and a second portion, located in one and the other bottom segment, respectively (the segment is described in this application), which are inclined relative to the longitudinal axis of the bottom.

In one preferred embodiment, the bottom segment is made of metal, for example, high-strength aluminum, titanium, steel, in particular high-strength grades (Powerhard, Powerweld).

In one of the preferred embodiments, linings (10) are installed on the end parts of the cross beams (3).

In one of the preferred embodiments, a central rib (2) is rigidly attached to the end portions of the cross beams (3) and to the flooring (1).

In one of the preferred embodiments, the connection of the flooring (1) with the central rib (2), cross beams (3), lodgements (4), body rotation ears (5), ribs (6), hydraulic cylinder mounts (7), longitudinal beams (8), stiffening ribs (9) and linings (10) is made rigid. Also, the connection of the cross beams (3) with the central rib (2), lodgements (4), body rotation ears (5), ribs (6), hydraulic cylinder mounts (7), longitudinal beams (8), stiffening ribs (9) and linings (10) is made rigid. The said rigid connection can be made by welding, bolts, rivets.

Brief description of the drawings

Fig. 1 shows a general view of the bottom of a dump truck with a highlighted segment.

Fig. 2 shows a segment of the bottom of a dump truck.

Fig. 3 shows a section of the bottom of a dump truck along the stiffening ribs.

The following are indicated on the figures: 1 - flooring, 2 - central rib, 3 - cross beams, 4 - supports, 5 - body rotation ears, 6 - rib, 7 - hydraulic cylinder mounts, 8 - longitudinal beams, 9 - stiffeners, 10 - linings.

Implementation of a utility model

The bottom segment of a dump truck vehicle (Fig. 1, 2) contains a flooring (1) and cross beams (3), on which a bed (4) and a body rotation eye (5) are installed, connected to the flooring (1) by a rib (6), and also contains a hydraulic cylinder mount (7), at a distance from which a longitudinal beam (8) is installed, made longer than the length of the hydraulic cylinder mount (7).

The decking (1) forms a working surface that absorbs distributed and impact loads from bulk cargo and pieces, ensuring transfer to the system of ribs and beams described below without local failures.

The cross beams (3), on which the bed (4) and the body rotation ear (5) are installed, take on the loads from the flooring (1) and create a rigid and reliable frame for the bottom, capable of dividing the flooring (1) into short spans, creating a support grid that reduces deflections under the load and stabilizes the geometry during unloading and increases resistance to dents, increasing the reliability of the bottom.

The body pivot eye (5), connected to the deck (1) by a rib (6), transmits the reactions of the oscillation axis, and an additional rib (6) strengthens the connection of the body pivot eyes (5) with the deck (1), relieving the seams and preventing cracks in the hinge area, where peak moments occur during body lifting. The practice of similar designs with known ribs installed at an angle and connected not to the deck (1), but to a transverse beam or without them at all, has shown the low reliability of this type of reinforcement due to the occurrence of cracks in the seams connecting the body pivot eyes (5) with the deck (1) during lifting cycles and impacts.

The hydraulic cylinder mount (7) is a unit for inputting large concentrated forces, which ensures the transfer of force to the power circuit of the bottom, therefore the flooring (1) near the hydraulic cylinder mount (7) requires increasing its reliability. In this regard, a longitudinal beam (8) is installed at a distance from the hydraulic cylinder mount (7), made longer than the length of the hydraulic cylinder mount (7). The longitudinal beam (8) relieves the area of the force input from the hydraulic cylinder to the hydraulic cylinder mount (7), creating bypass paths for transferring loads, their location at a distance from the hydraulic cylinder mount (7) ensures the attenuation of stresses to working levels before they reach less rigid sections of the flooring (1). In this case, it is preferable to make the longitudinal beam (8) shorter than the length of the bed (4) to avoid adding weight to the body, which may also be accompanied by reliability problems.

A longitudinal beam (8) that is shorter than the length of the hydraulic cylinder mount (7) or that is adjacent to it will lead to sharp fractures in rigidity, which will act as a stress concentrator and lead to the occurrence of fatigue cracks along the seams and flooring (1).

If necessary, to ensure increased rigidity and reliability of the bottom frame, stiffening ribs (9) are located inside the cross beams (3) and longitudinal beam (8) (Fig. 3). To prevent possible weight gain of the bottom, the stiffening ribs (9) are made with holes.

Additionally, the flooring (1) of the rear portion of the bottom segment is inclined relative to the longitudinal axis of the bottom. When considering the bottom as a whole, the flooring (1) of the rear portion of the bottom comprises one and a second portion, located in one and the other bottom segment, respectively (the segment is described in this application), which are inclined relative to the longitudinal axis of the bottom, providing additional rigidity to the bottom.

A transport hole is made in the support (4), and a pin for fixing the body in the raised position is installed in the body rotation ear (5) with the possibility of rotation.

It is also preferable to install cover plates (10) on the end sections of the cross beams (3). Specifically, cover plates (10) are installed in the contact area of the cross beams (3) with the lower flange of the side wall, and in the contact area of the cross beams (3) with the central rib (2). Additional cover plates may be installed if necessary.

In one embodiment, a central rib (2) is rigidly attached to the ends of the cross beams (3) and to the deck (1). Dividing the dump truck body floor into segments further reduces the time and labor required to deliver it to the operating site, due to its large dimensions when assembled. Therefore, the central rib (2) can be installed on one of the dump truck body floor segments upon delivery or can be rigidly attached to the floor segments during assembly.

A segment of the bottom of a dump truck is manufactured, containing a flooring (1) and cross beams (3), on which a bed (4) and a body rotation ear (5) are installed, connected to the flooring (1) by a rib (6), and also contains a hydraulic cylinder mount (7), at a distance from which a longitudinal beam (8) is installed, made longer than the length of the hydraulic cylinder mount (7).

Loading tests were conducted on a manufactured dump truck body segment and on known similar models, simulating the loading of cargo into a dump truck body. The load drop height was 1.5 m, the load particle size ranged from 20-40 mm, the loading rate was 25 kg/min, and the number of cycles was 10,000.

Tests revealed early cracks at the body pivot points, significant floor deflection, and dent marks, particularly in the cylinder mount area, on comparable vehicles. The claimed design of the dump truck's underbody segment showed no cracks or other damage at the body pivot point, the cylinder mount area, or the floor.

Thus, the claimed utility model ensures the creation of a highly reliable dump truck body bottom.

Claims (9)

1. A segment of the bottom of a dump truck vehicle, containing a flooring (1), a central rib (2) and cross beams (3), on which a bed (4) and a body rotation ear (5) are installed, connected to the flooring (1) by a rib (6), and also contains a hydraulic cylinder mount (7), at a distance from which a longitudinal beam (8) is installed, made longer than the length of the hydraulic cylinder mount (7). 2. The bottom segment according to paragraph 1, characterized in that the longitudinal beam (8) is made shorter in length than the length of the support (4). 3. The bottom segment according to paragraph 1, characterized in that stiffening ribs (9) are located inside the cross beams (3) between them and the flooring (1). 4. The bottom segment according to item 3, characterized in that holes are made in the stiffening ribs (9). 5. The bottom segment according to item 1, characterized in that a transport hole is made in the support (4). 6. The bottom segment according to item 1, characterized in that a pin is installed in the body rotation ear (5) with the possibility of rotation. 7. The bottom segment according to claim 1, characterized in that the flooring (1) of the rear part of the bottom segment is located at an angle to the longitudinal axis of the bottom. 8. The bottom segment according to paragraph 1, characterized in that linings (10) are installed on the end parts of the cross beams (3). 9. The bottom segment according to item 1, characterized in that a central rib (2) is rigidly attached to the end parts of the cross beams (3) and to the flooring (1).