UA44374C2 - TRACK CHAIN TRACK - Google Patents

Abstract

A caterpillar track contains an odd number of bore tabs and a plate with support tracks and support surface, on which figured grooves with strengthening ribs and at least three ground-grippers are located. To strengthen the track each strengthening rib is located at the area of connection of the bore tab with the outside wall of the figured groove, and coupled with the bulge located at the edge of the bore tab and having width that is equal to 13-20 % of the bore tab length. The outside edges of the two edge bore tabs have teats. Under each of the remaining bore tabs, a ground-gripper is located along the bore tabs centerline. At least two ground-grippers have flanged edges located nearest to the caterpillar track center. The height of each strengthening rib is less that the height of the ground-gripper, and the width of the strengthening rib is equal to the width of the bulge at the edge of a bore tab. The support tracks sections located over the edge figured grooves have bulges. Each of these bulges has a cylindrical hollow with a hole to attach an asphalt-protecting shoe.

Description

The invention relates to transport engineering, and in particular, to tracked vehicles.

A well-known crawler chain track, which has a plate with a running track, ground grips and lugs. The truck has an odd number of lugs. Ground hooks are located on the supporting surface of the plate on the outside of the tracks relative to the axis of the lugs. At the same time, soil grips can be made of different shapes: rectilinear, beveled, curved, etc. (author's certificate of the USSR Me1257012 dated 26.03.85, MKY "7: В62055/26).

The caterpillar, assembled from the above-described tracks, has increased passability on undulating soils.

During the operation of the track, the tracks are constantly subjected to variable loads, the high level of which is the cause of fatigue breakdowns of the tracks. As experience shows, the most loaded places are the joints of the lugs with the plate on the edges of the tracks. When using a track with tracks of the above-described design on hard soils, ground grips shifted outward from the axis of the eye will create additional bending stresses on the eyes and contribute to the destruction of the tracks.

A track of a caterpillar chain is known, which includes a base plate with a running track, a front end and a reverse end located on the longitudinal axis of the track. On the supporting surface of the plate, along the track, there is a ground grip, made in the form of a rib. The plane of the edge of the ground hook is connected to the tip of the reverse gear. The ground hook in the middle cross-section is lenticular, and its ends are located at an acute angle to the axis of the track and are directed in opposite directions from the hooking surface of the hook (author's certificate of the USSR Me1079529 dated 28.06.82, MPKU: В862055/18).

This arrangement of the ground hitch on the track gives optimal values of moments of resistance at a dangerous intersection, allows to increase maneuverability and passability on weak soils with low bearing capacity.

However, on hard soils, the stability of the machine against lateral displacement is low, because the bent edges of the ground grip are located close to each other.

Technically closest to the claimed invention is a track track chain that contains an odd number of lugs, a base plate made in the form of two half-plates connected by a central lug. Each half-slab has a running track on one side, and on the opposite side - on the support surface - a shaped notch and ground grips. Each of the shaped recesses, the side walls of which are connected by a transverse stiffening rib, is located under the running track. The rectilinear ground grips are located under the central lugs at an angle to the lug axis, and under the extreme lugs - along the lug axis. Moreover, the extreme ground grips, i.e. the ground grips located under the extreme lugs, are made shorter compared to all other ground grips. On the central lug connecting the half-plates, there is a dovetail and two ground grips, located at an angle to the axis of the lug and at an angle to each other. The thread is made with a flush located at the level of the upper contour of this ear (author's certificate of the USSR Mo235552 dated 25.12.65.

MIC: 863055/18.

The well-known track is characterized by good passability on ice and resistance to lateral sliding.

However, the execution of the track plate in the form of two half-plates, connected to each other by one central eye, increases the load on the points of articulation of the half-plates with the central eye, and, therefore, increases the probability of fatigue failures of the track. In addition, the use of six ground grips, and two ground grips on the central eye, located at an angle to the axis of the eye and to each other, is the reason for limiting the speed of movement of the machine during its straight-line movement.

The basis of the invention is the task of improving the track of the caterpillar chain, in which, due to the optimal selection of strengthened places and a new arrangement of ground grips and stiffeners, an increase in the strength of the track is ensured without increasing its weight.

To solve the problem, in a known track of a caterpillar chain containing an odd number of lugs, a plate with running tracks, on the support surface of which there are shaped recesses with stiffening ribs and at least three ground grips, as well as cleats, according to the invention, each of the stiffening ribs is located at the point of articulation of the ear with the outer wall of the shaped notch and combined with the thickening at the edge of the ear. The braids are made on the outer edges of the two outermost lugs. Under the rest of the lugs, along their axis, there is a ground hook, at least two of which have a bent edge. At the same time, thickenings are made in the areas of the running track above the extreme shaped recesses.

Additional differences of the invention are the following features: - the width of the thickening at the edge of the ear is 13 - 2095 of the length of the ear; - in each of the thickened sections of the running track, a cylindrical recess with a through hole for attaching an asphalt shoe is made; - each of the stiffeners has a height less than the height of the ground grips, and a base width equal to the width of the thickening on the edge of the lug; - the edge of the ground grip, located closer to the center of the track, is bent.

When using the invention, increasing the strength of the track without increasing its weight is ensured as follows.

Firstly, in the points of articulation of the eye with the plate, there are stiffeners that strengthen the areas that are most affected by variable loads, the high level of which is the cause of fatigue failures of the tracks.

Secondly, the number and location of soil grips are selected so that additional loads on the lugs are excluded.

Thirdly, the edges of the lugs (thickenings and bends) and the places of attachment to the slab, if necessary, of asphalt shoes are strengthened.

Fourthly, the execution of at least two soil hooks with bent edges ensures stability against lateral displacement and does not create additional loads on the lugs.

And, fifthly, increasing the strength of the track was achieved without increasing its mass due to the selection of optimal sizes of thickened sections and the ratio of the height of the ground grips and stiffeners.

An additional advantage of the claimed invention is the provision of increased passability on undulating soils, since on undulating soils, the stiffeners act as additional ground grips.

The essence of the invention is explained by the drawings, which show: - fig. 1 and fig. 2 - view of the track from the side of the running tracks and from the side of the supporting surface, respectively, in axonometry.

The track of the caterpillar chain contains an odd number, for example, seven lugs 1,2, 3,4,5,61 7 and a plate 8 with running tracks 9, on the support surface of which there are shaped recesses 10 with ribs 11 of rigidity and at least three ground grips 12 .

Lugs 1, 2 and Z are located along one edge of the track, and lugs 4, 5, 6 and 7 - along its other edge. On the outer edges of the two outermost lugs 4 and 7, there are grooves 13. Under the remaining lugs 1, 2, 3, 5 and b along their axis there is a ground hook 12. Moreover, under lugs 2, 5 and 6 there are ground hooks 12 of a rectilinear shape, and under the lugs 1 and З there are soil grips 12, which have a bent edge. At the same time, the bent edge of each of the ground grips 12 is located closer to the center of the track.

Each of the stiffening ribs 11 is located at the point of articulation of the lugs 1 - 7 with the outer wall of the shaped recess 10 and is connected to the thickening 14 at the edge of the lugs 1 - 7. The width of the thickening 14 is 13 - 2095 of the length of the lugs 1 - 7. The ratio of the width of the thickening 14 and the length lugs 1 - 7 are determined experimentally, taking into account the following understandings. At values of the thickening width of 14, less than 1395, the service life of the lug decreases, and at values greater than 20905, the mass of the track increases significantly. At the same time, each stiffening rib 11 has a height less than the height of the ground grips 12, and a base width equal to the width of the thickening 14.

In the sections of the running track 9 above the extreme shaped recesses 10, thickenings 15 are made. In each of the thicknesses 15, a cylindrical recess 16 with a through hole 17 for fastening an asphalt shoe (not shown in the drawings) is made.

Tracks are connected to each other with the help of fingers and nuts (not shown in the drawings).

Load changes are constantly acting on the track during the movement of the tracked machine. The mutual turns of the tracks when copying the profile of the track with the caterpillar and bending the rollers (not shown in the drawings) and wheels (not shown in the drawings) of the driver create a load on the edges of the lugs 1-7, which are strengthened by thickenings 14 and ends 13. When stretching the track in the horizontal plane, the tensile forces are applied to the stiffening points of joints 1-7 with plate 8, reinforced with the help of ribs 11. The lugs 3, 5 and b are the most loaded, therefore these lugs 3, 5 and b are strengthened from both edges. The need to attach asphalt walking shoes (not shown in the drawings) to the track is the reason for making 9 holes for mounting bolts (not shown in the drawings) in the plate 8 on the side of the running track. Since the cylindrical recess 16 with a through hole 17 is made in the reinforced area of each of the running tracks 9, in the thickening 15, the action of alternating loads does not lead to the destruction of the plate 8.

Mat - | 1 g. shi M; ! breath p/o | and r 7 g A

And what! shi ho hearing. Here I am

X OCT

- : To this day

И, / и- IC with 1 и , и шчи

I

! 7 2 a

Fig. 1 nya 2 y Y ky y. in

GC and

Claims (5)

1. A crawler chain track containing an odd number of lugs, a plate with running tracks, on the support surface of which there are shaped recesses with stiffening ribs and at least three ground grips, as well as cleats, which is distinguished by the fact that each of the stiffening ribs is located in place articulation of the lug with the outer wall of the shaped notch and combined with the thickening at the edge of the lug, the loops are made on the outer edges of the two outermost lugs, under the rest of the lugs, their axis is located along the ground grip, at least two of which have a bent edge, while in the sections of the running track above the outermost lugs thickenings are made by notches. 2. Track according to claim 1, which differs in that the width of the thickening at the edge of the lug is 13-2095 of the length of the lug. 3. Track according to claim 1, which is characterized by the fact that in each of the thickened sections of the running track, a cylindrical recess with a through hole for attaching an asphalt shoe is made. 4. Track according to claim 1, which differs in that each of the stiffeners has a height less than the height of the ground grips, and a width of the base equal to the width of the thickening at the edge of the ear. 5. Track according to claim 1, which differs in that the edge of the ground hook is bent, located closer to the center of the track.