RU2245813C1 - Vehicle track chain and track - Google Patents

Abstract

FIELD: mechanical engineering; crawler vehicle.

SUBSTANCE: invention relates to tracks and track link joints. Proposed track chain contains tracks formed by links with outer and inner lugs and race for track rollers. Track chain contains also shoes coupled with links. Outer and inner lugs of links are connected by two pins in series. Bushings located between inner lugs are rigidly connected with pins. Pins are provided with beads on one end and cone on other ends. Grooves are made on outer lugs. Through axial dummy hole is made in one of each pair of pins. Shoes and links are made in form of solid cast structure forming tracks. Holes of outer and inner lugs accommodate stepped bushings cast integral with lugs.

EFFECT: improved manufacturability, reliability, repairability of track chain, reduced metal usage of tracks.

3 cl, 2 dwg

Description

The present invention relates to the field of mechanical engineering, in particular to vehicles on a caterpillar track, namely to caterpillars and connections between the links of the caterpillar.

A caterpillar chain is known in which the outer eyes are mounted movably on the finger, and the inner ones are rigidly connected to it. The finger is made integral, stepwise, i.e. between the inner eyes is made of a larger diameter (p. USA No. 4150856, B 62 D 55/20 from 11.25.77, publ. 04.24.79).

The disadvantage of this design is the increased metal structure and the difficulties associated with the Assembly and disassembly of the connection links.

Known caterpillar chain containing links connected in series by fingers and bushings (DE AZ No. 4410388, B 62 D 55/20 from 03/25/94, publ. 09/28/95).

The disadvantage of this chain is that the finger is made stepped, which increases the intensity. The outer lugs are rigidly mounted on the finger, and the inner lugs and sleeve are movable.

The disadvantage of this design is the low maintainability.

The specified design is selected by the authors as a prototype.

A known design of the caterpillar chain, consisting of links sequentially interconnected by fingers and bushings, shoes connected to the links by bolts and nuts and forming tracks (n. Russia No. 2036816, B 62 D 55/20 from 11.11.92, publ. 06/09/95 g.).

The disadvantage of this design is the presence of fasteners connecting the shoes and links, combining them into tracks, which increases the metal consumption of the chain as a whole. In addition, maintainability of such a circuit is difficult.

The specified design is selected by the applicants as a prototype.

The technical objectives of the invention is to increase the manufacturability, reliability, maintainability of the track chain and reducing the metal consumption of the tracks.

The objectives are achieved in that in the track chain of a vehicle containing tracks formed by links with external and internal eyes and a treadmill for track rollers, shoes rigidly connected to the links, while the external and internal eyelets of the links are connected in series with fingers and contain bushings, mounted on the fingers and located between the inner eyes, the outer eyes being movably connected to the fingers, and the inner eyes rigidly, according to the invention, the ratio h / h _{1 was} 0.5-0,

where h is the distance from the sole of the shoe to the axis of symmetry of the eyes of the links,

h ₁ is the distance from the axis of symmetry of the eyelets of the links to the treadmill, while the connection of the outer and inner eyelets of the links is carried out by a pair of coaxial, opposite to each other fingers rigidly connected to the sleeve, each of the fingers at one end in contact with the external eye , has a shoulder, and on the other a conical narrowing, and on the outer eyes grooves are made under the shoulder of each finger.

In one of each pair of fingers made through axial technological hole.

The relationship between the distance from the sole of the shoe to the axis of symmetry of the eyes of the links to the distance from the symmetry axis of the eyes of the links to the treadmill in the range of 0.5-0.7 allows to reduce the total height of the track, which reduces the metal consumption of each track and track chain as a whole and is a consequence of the constructive run track.

The implementation of the connection of the outer and inner eyes of the chain links, a pair of coaxial, opposite to each other fingers, improves maintainability, and the rigid connection of the latter with the sleeve ensures the strength of the press connection by increasing the total length of the press fit the inner eye - the sleeve - the finger.

The presence of a collar at one end of each finger in contact with the external eye ensures the reliability of the external eye-finger connection, preventing mutual displacement of the tracks.

Performing a conical narrowing at the other end of each finger makes it easier to press-fit into the inner lugs and sleeve and eliminates cuts in the o-rings.

The execution of grooves under the flange of each finger on the outer eyes provides a reliable connection and significantly limits the penetration of soil into the connection, since the flange with the groove form a labyrinth seal.

The presence of a through axial technological hole in one of each pair of fingers facilitates disassembly of the chain links.

According to the invention, the links and shoes are made in the form of a one-piece structure in a track chain track containing links that are rigidly connected with them, while the holes of the eyes of the links contain step bushings cast with one piece with annular flanges at the ends protruding for some distance relative to end surfaces.

The implementation of the tracks in the form of a one-piece construction eliminates the presence of fasteners connecting the links and shoes, which reduces the metal consumption.

The presence of links in the holes of the eyes of the links cast in one piece with them of stepped bushings increases the wear resistance of the finger-eye pair.

In addition, the annular flanges of the bushings protruding relative to the end surfaces of the eyes during the manufacture of the casting do not allow metal to enter these surfaces, which excludes their mechanical processing, i.e. manufacturing time is reduced, energy is saved, the cost of the product is reduced.

As a result of the patent research, no similar technical solutions were identified with the claimed combination of features, which suggests that the proposed invention meets the criteria of "novelty" and "inventive step". May find application in industry, i.e. considered "industrially applicable".

The applicants manufactured a pilot batch of track chains of the claimed design, which is being tested at the Chelyabinsk Tractor Plant.

The essence of the invention is illustrated by drawings, where figure 1 shows a General view of the caterpillar chain side view, figure 2 is a section along aa in figure 1.

The track chain contains tracks 1, formed by links 2, 3, 4, 5 with outer eyes 6 and 7, inner eyes 8 and 9, a treadmill 10, shoes 11. The outer eyes 6 and 7 and the inner eyes 8 and 9 are connected in series with two fingers 12 and 13 and contain bushings 14 located between the inner eyes 8 and 9 and rigidly connected to the fingers 12 and 13. The fingers 12 and 13 have flanges 15 and 16 at one end and a tapered narrowing 17 and 18 at the other. On the outer eyes 6 and 7, grooves 19 and 20 are made. In one of each pair of fingers 13, a through axial t hnologicheskoe opening 21.

The shoes 11 and links 2, 3, 4, 5 are made in the form of a cast structure and form tracks 1. The holes of the outer eyes 6 and 7 and the inner eyes 8 and 9 contain stepped bushings 22, 23, 24, 25, cast together with the eyes 6, 7, 8, 9. The bushings 22 and 23 contain recesses 26 under the seal, which are installed during assembly of the chain.

The caterpillar chain is assembled as follows.

The first track 1 is installed on the runners of the assembly line by the treadmills 10 links 2 and 3 down. Then, bushings are installed between the inner eyes 8 and 9 of the links 2 and 3 14. The outer eyes 6 and 7 of the links 4 and 5 of the subsequent track are installed, into which the fingers 12 and 13 are installed. The fingers 12 and 13 are pressed onto the two sides with the help of a press contact. The fingers 12 and 13 go with their shoulders 15 and 16 into the grooves 19 and 20, made on the end surfaces of the outer eyes 6 and 7, creating an additional seal of the connection.

In this way, all subsequent tracks that form the track chain are connected.

The inventive design of the caterpillar chain is technologically advanced, reliable, has increased maintainability and reduced metal consumption.

Claims (3)

1. Caterpillar chain of a vehicle containing tracks formed by links with external and internal eyes and a treadmill for track rollers, shoes rigidly connected to the links, while the external and internal eye of the links are connected in series with fingers and include bushings mounted on the fingers and located between the inner lugs, wherein the lugs associated with the outer fingers movably and eyelet inner - rigidly, characterized in that the ratio h / h ₁ is 0.5-0.7, where h - distance from the sole Bashmilah ka to the axis of symmetry of lugs units, h ₁ - the distance from the axis of symmetry of lugs units to the treadmill, in this connection of external and internal lugs units interconnected by a pair of coaxial, oppositely spaced fingers, rigidly connected with the hub, each of the fingers on one of the ends in contact with the outer eye has a shoulder, and on the other has a conical narrowing, with grooves made under the shoulder of each finger on the outer eyes. 2. The vehicle caterpillar chain according to claim 1, characterized in that in one of each pair of fingers a through axial process hole is made. 3. Track track chain containing links, shoes rigidly connected to them, characterized in that the links and shoes are made in the form of a one-piece construction, while the holes of the link eyes contain step sleeves cast with one piece with ring flanges at the ends protruding at some distance relative to the end surfaces of the eyes.

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