SU1581642A1 - Crawler tractor - Google Patents

Abstract

FIELD OF THE INVENTION The invention relates to vehicle engineering and provides enhanced functionality by changing ground clearance. The tractor contains a frame with transverse bars, having elongated heads at the ends, in which two clamps are made for fastening the axles of the suspension carriages. When installing trunnions in the upper jaws, the tractor is used for general operations. When installing trunnions in the lower jaws, the tractor is used for tilled works with a large agrotechnical clearance. 2 hp ff, 8 ill.

Description

FIELD OF THE INVENTION The invention relates to a transport engineering, mainly to tracked agricultural machines.

The purpose of the invention is to expand the functionality by changing the road and agrotechnical clearance.

FIG. 1 shows a crawler tractor, side view, set up for tilled work; in fig. 2 - tractor, front view; in fig. 3 - tractor carriage and frame crossbar, side view; in fig. 4 shows section A-A in FIG. 3 (crossbar of the tractor frame with a trunnion mounted in the lower head clamp); in fig. 5 is a section BB in FIG. four; in fig. 6 - tractor frame with transverse bars, side view; - FIG. 7 is a diagram of the rear part of the tractor chassis system; in fig. 8 is a diagram of the front of the tractor chassis system.

Tracked tractor consists of a frame 1, on which are mounted running system 2, cab 3, hood 4, fuel tank 5.

The frame includes longitudinal spars 6 interconnected by transverse bars 7. The latter are hollow at the ends, removed in a vertical transverse direction of the head 8, each of which has two clamps located at different heights — the upper clamp 9 and the lower clamp 10 to install the trunnions 11. The clamp can be made, for example, with a terminal block, and the trunnion 11 is fastened with bolts 12 in it. Balance carriages of the suspension bracket 13 are mounted on the trunnions fixed in the clamps of the heads of the transverse bars.

Tracked tractor works as follows.

In general, such as plowing, deep

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loosening, etc., the tractor is operated with axles 11 installed in the upper clamps 9 heads 8 of the transverse bars 7 of the frame (Fig. 7, 8 and 10). Tilt angles leading if. (from the rear support roller 14 of the suspension carriage 13 to the drive wheel 15) and the running cpc (from the guide wheel 16 to the front support roller 17), the branches of the track 18 are minimal.

When performing tilled works, for example, inter-row cultivation, the tractor is operated with pins 11 installed in the upper clamps of 10 heads of the transverse bars of the frame.

To retract the tractor from the general-purpose work variant to the tillage version, it is necessary to loosen the tension of the caterpillars 18 by moving the guide wheel 16 back to disengage the caterpillars, jack up the tractor and remove the balancing suspension carriage 13 from the trunnions, release the bolts 12 and rearrange the trunnions 11 of upper clamps 9.in the lower clamps -10 elongated Si heads of the transverse bars 7, then secure the trunnions, install the suspension carriages on them, connect the tracks and adjust their tension.

The tractor is rearranged from the row-cultivating variant to the general-purpose variant in reverse order.

When the tractor is modified from the general-purpose version to the cultivated area, the agrotechnical increases: h and the road clearance, which means that the height of the center of mass of the tractor increases. This can lead to an increase in longitudinal oscillations (galloping) of the tractor, especially when driving at a high speed.

In order to eliminate this phenomenon, it is necessary to make the distance L between the lower clips 10 of the heads of the adjacent transverse bars to be greater than the distance L B between the upper clips 9 (Fig. 6), i.e. the condition L n L “is satisfied. In this case, in setting up for missing work, the tractor has a larger longitudinal base than in setting up for general purpose works, hence, the pitching is reduced. In addition, the longitudinal stability of the tractor is increased.

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In this case, the lower clips 10 of the heads of adjacent transverse bars may be located on the lines located to the vertical one, at an angle d. equal to or less than the angle of inclination of the leading branch of the caterpillar 18, and directed in opposite directions (FIG. 7) or at an angle equal to or smaller than the angle of inclination of the downward branch of the caterpillar (FIG. 8), i.e. of conditions: 6 (fe or o (((.

In order to increase the reliability of fastening the trunnions 11 of the suspension carriages, in the clips of the heads of the 8 crossbars, cylindrical inserts can be installed in the clips free of the trunnions. The diameter of the liner is equal to the diameter of the pin, and the length is not less than the length of the clip. Even better results are achieved if the surface of the liner is covered with a layer of elastic material, such as rubber. The liner may be entirely made of elastic material.

Claims (3)

1. A crawler tractor containing a frame including longitudinal langerons interconnected by transverse bars made with hollow at the ends, elongated in a vertical transverse plane heads with clamps for mounting trunnion carriages, characterized in that changes in the road and agrotechnical clearance, each head of the transverse bars is made with at least two clamps for suspension carriage trunnions located at different heights, while The fact that between the lower clips of the heads of adjacent transverse bars is equal to or greater than the distance between the upper clips. 2. Tractor according to claim 1, differing from that with the fact that the lower clamps in each head of the adjacent transverse bars are made on the lines located to the vertical at an angle with the top in the center of the upper clamps not exceeding the angle of inclination of the running branch of the track , and directed along the longitudinal axis of the tractor in opposite directions. 3. A tractor in accordance with claim 1, wherein the lower clamps in each head of the adjacent transverse bars are made on lines located to the vertical at an angle with ver, 3 L /// /// /.  / TI - y, - I -rL -H) UH-h v Do // /// ///  Phii Y x р15816426 tire in the center of the upper clamps, not greater than the angle of the leading branch of the caterpillar, and directed along the longitudinal axis of the tractor in opposite directions. 18 HI I No Phage. 2 i n Fig.Z FIG L 12 6-B to f eFig. 6 P FIG. five four Fig.d R Phage. 7