RU2762077C1 - Vehicle track chain - Google Patents

Abstract

FIELD: vehicles.

SUBSTANCE: invention relates to a vehicle track chain. The caterpillar chain contains steel tracks, rigidly connected to stops, lugs and steel hooks, in which the liners are located. The liners are made of high-strength cast iron and have holes into which the axles are inserted, connecting the tracks and liners to each other. Axial and radial displacement of the axes is limited by connectors. The axles and connectors are made of the same material as the inserts and have holes for fastening. The whole structure is pulled together by a high-strength bolt connection.

EFFECT: increased service life and maintainability in the field.

3 cl, 7 dwg

Description

The track chain of a vehicle belongs to transport engineering, mainly to wheeled vehicles.

The known track chain of a vehicle includes tracks connected by shoes made with a connecting part, a working part and a thrust surface to form an internal cavity. The track is made with the formation of windows of side ribs and a lug. An anti-fix element is installed at the junction of the working part of the shoe with the track. The thickness of the working part of the shoe in the longitudinal direction is equivalent to the width of the window wall in the cross-section of the track. The connecting part of the shoe is fixedly connected to the window wall of the adjacent track (see ed. St. No. RU 2299148 C1, class B62D 55/205). The disadvantages of the known solution are the impossibility of making repairs in the field, due to the one-piece connection of the tracks with each other, as well as the laborious and expensive production process.

The closest in essential features and the achieved effect to the claimed device, selected as a prototype, is a vehicle track chain containing two side elements and two pin elements, and two side elements oppose each other and are connected by two pin elements, and the pin elements are longitudinal elements with a cross-section with one axis of symmetry (see ed. St. No. US 2019/0176915 A1, class B62D 55/205). One of the disadvantages of the known solution is the increased wear of the track hooks in the places of their contact with the connecting links, due to the fact that both elements are made of steel, despite their shape - this significantly reduces the service life of the track chain. Another disadvantage of the solution is the impossibility of making repairs in the field, due to the one-piece connection of the tracks to each other.

The above disadvantages are eliminated in the proposed design.

Track chain of a vehicle containing steel tracks, fixedly connected to stops, lugs and steel hooks, in which there are liners made of high-strength cast iron and having holes into which axles are inserted that connect the tracks and liners to each other. Axial and radial displacement of axes is limited by connectors. The axles and connectors are made of the same material as the inserts and have holes for fastening. The whole structure is pulled together by a high-strength bolt connection.

Moreover:

- For tensioning the caterpillar using a special tensioner, extended connectors are provided;

- The connectors are provided with special grooves, shaped to prevent radial displacement of the axes;

- The connectors are provided with grooves for the bolt head and nut;

- The hole for the axle in the liner is made with a guaranteed clearance;

- The shape of the insert, describes the place of its seating and prevents its radial displacement.

Comparative analysis with the prototype revealed the following distinctive features:

- The caterpillar chain has a collapsible connecting link;

- The thickness of the working part of the axle is equivalent to the thickness of the working part of the liner in the cross-section;

- Bushings, axles and connectors are made of high alloy cast iron, which has high resistance to abrasion and abrasion.

As can be seen from the comparative analysis, the identified set of essential distinctive features is new.

Analysis of patent and scientific and technical information showed that the proposed technical solution goes beyond the existing level of technology in this area, therefore, it can be recognized as meeting the criterion of "inventive step".

The problems solved by the proposed invention are to increase the service life of the track chain and maintainability in the field.

The solution to these problems is provided by replacing the connecting link with a detachable connection, the contacting parts of which are made of high-alloy cast iron, which is resistant to abrasive wear and abrasion, which ensures an increased service life of the invention and the possibility of its repair in the field.

The essence of the invention is illustrated by drawings.

FIG. 1 - General view of the track chain.

FIG. 2 - Front view of the track chain.

FIG. 3 - An illustration of the mating elements of the track chain.

FIG. 4 - Image of a collapsible connecting link.

FIG. 5 - Cross-section and longitudinal section of a collapsible connecting link.

The device works as follows.

When the track chain 2 bends around the wheels 1 of the vehicle, a relative rotation of the tracks 6 is made, which are fixedly connected to the stops 9, the lugs 7 and hooks 13 into which the liners are inserted 10. The liners 10 are limited from radial displacement by their shape, therefore, their displacement occurs together with the hook 13, relative axis 11. The axis is limited from radial displacement by connectors 3 and 8. The inner working surface of the insert comes into contact with the outer working surface of the axis only from one side, because the length of connectors 3 and 8 provides a guaranteed clearance "A" on the other side. The thickness of the insert "B" at the point of contact is equivalent to the thickness of the axis "C", also both elements are made of high-alloy cast iron, which ensures a decrease in wear and an increase in the service life of the caterpillar chain. The whole structure is pulled together by a high-strength bolted connection 12, which makes it possible to replace parts that have been worn out over time in the field of operation, which additionally provides economic benefits. Connectors 4 and 5 are the closing links of the vehicle's track chain and, in their design, have a difference from connector 3, only with an increased center distance, which provides mounting variability with different center distance of wheels 1.

On the basis of the proposed invention, the author has made a prototype of the product and is currently testing the track chain. In the future, based on the test results, the design documentation will be revised, after which it is planned to conduct tests in real operating conditions.

Claims (3)

1. The track chain of a vehicle, including steel tracks with stops, connecting links, lugs and steel hooks connected to each other, characterized in that the connecting links are made as detachable joints containing connectors, liners having holes into which axles are inserted, tightened high-strength bolted connection, and the material of the bushings, pins and connectors is high-alloy cast iron. 2. The track chain of the vehicle according to claim 1, characterized in that the liners are inserted into the steel hooks of the tracks, therefore, the working surface of the liner contacts the working surface of the axle. 3. The track chain of the vehicle according to claim 2, characterized in that the axles have special protrusions, and the connectors are grooves for them, which do not allow the axle to make a radial displacement at the moment of contact with the liner.

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