SU696332A1 - Device for investigating kinematics of endless-track machine - Google Patents

Description

The invention relates to the field of transport engineering, mainly to the production and testing of tracked vehicles. A stand for testing tracked propulsive devices is known, containing a tracked bypass with road rollers and mobile brackets for Measuring Tracked bypass parameters during its rewinding 1. This stand is not allowed. It is impossible to investigate the nature of the engagement of the track with the ground, which does not provide a complete picture of the kinematics of the tracked vehicle. It is also known a device for studying a kinematics of a caterpillar machine, containing a crawler contour with a strain gauge, encompassing track rollers, a bracket with a spring-loaded roller fixed in a frame, and position gauges of the strain gauge link mounted on a hanger of a matte to which a rigid strain gauge is attached 3 BeoIIII 2J The above device allows us to investigate the nature of the engagement of the track with the ground. However, it does not provide for obtaining aggregate data of the Htjx interaction with the ground throughout the track bearing on the ground, which reduces its range of application and measurement accuracy. The aim of the invention is to improve the accuracy of research and expand the field of application of the device. The goal is achieved by the fact that the device is equipped with guides attached to the body of the machine along a crawler bypass, and a second roller mounted in the said guides with its axis rigidly fixed to the bracket and equipped with a displacement sensor connected to the strain gauge. In addition, the device is equipped with a contact mechanism for fixing the axles of the support rollers mounted on the bracket and counter stops mounted on the axes of the support rollers. FIG. 1 shows the device, a general view; in fig. 2 - the device, front view; in fig. 3 is a section along A-A in FIG. 2; in fig. 4 - the device, side view; in fig. 5 - spring roller, slit; in fig. 6 is a section along BB in FIG. five; in fig. 7 node G on fit-. five.

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Guides 1 are attached to the body of the machine by means of brackets 2. In the guides, a mechanism 3 is installed to measure the kinematics of the movement of the track. The mechanism includes a bracket 4, which is attached to the tenometric track. On the bracket 4, a rod b is mounted in the guide 5, at the end of which a frame 7 is fixed with a face 8, which serves to record the horizontal displacement of the track. The roller is pressed to the ground: with the aid of the spring 9. The rod 6 moves in two ball bearings 10. The cable 11 is fixed at one end to the frame 7, the other to the pulley 12 connected with the half-contact of the potentiometer 13. To prevent the rod 6 from turning around its axis on its surface there is a groove, into which the screw 14 enters. The downward movement of the roller 8 downward is carried out by means of an adjusting nut 15 Frame 7 is connected to the uprights 16 and 17 of the roller frame with screws. The drum 18 of the roller, on which the rubber track 19 is pressed, rotates on the shaft 20 in two bearings. A potentiometer 21 is integrated into the shaft housing 20, the slider 22 of which is connected via an intermediate disk 23 with a roller drum. To determine the position of the lethric track in a crawler track, as well as to measure the relative magnitude of the crawler tracker slipping, the device is mounted with an additional roller 24, mounted with its axis on the bracket 4 by means of a driving pin 25 and screws. ROLLER 24 is equipped with a potentiometer 26, the registration of the change in the length of the driving rod 25 is carried out by a rheostat 27, the xpfus of which is fixed to the bracket 4, and the slider is connected to the roller x 24 by means of the pulley 28 and the cable 29. To fix the passage of the axis of the support roller above the strain gauge The pins 30 are mounted on all axes of the support rollers, and a prariego 31 is mounted on the microstock4. The spring 32 serves for the elastic fastening of the roller 24 to the bracket 4.

The device works as follows. When the tracked vehicle is moving, the strain gauge truck, moving around the perimeter of the tracked bypass, comes into contact with the supporting surface, while the roller 8 presses against the supporting surface with spring 9 and when the track slides, it moves parallel to the track laid by the tracked vehicle .. When the track is sliding relative to the supporting surface, the roller 8 turns on bearings around the shaft 20 in one direction or the other. Slider 22 Potentiometer

21 shifts relative to its original position, which causes the bridge to be unbalanced and fixed on the oscilloscope tape. The depth of the truck and the change in the depth of the roller as it passes through the support rollers are measured by potentiometer 13. As the truck moves along the track and the roller goes along the undeformed soil, the spring 9 is compressed by the amount of ground deflation (track depth), the cable 1 is released and the pulley 12 potentiometer 1 3, under the action of a spring embedded in the potentiometer, rotates, which leads to imbalance of the bridge, and is fixed on the tape of the oscilloscope. When the tracked vehicle is moving, the roller 24 rolls along the guides 1, the potentiometer mounted inside the roller measures the distance traveled by the bus relative to the track. Consequently, using the roller 8 it is possible to measure the absolute value of the track slip against the ground, and using the roller 24 is the absolute value traversed by the casing of the tracked vehicle over the length of the bearing surface or at distances ji / kzhdu support rollers, for which it is mounted on the bracket 4 Mavatel 31. The positioning of the teneometric truck in the perimeter of the circumferential bypass is made from noMoas.0 roller 24 and rheostat 27. Potentiometer 26, embedded in roller 24, measures the angle of rotation of the bracket 4, and the rheostat 27 determines the distances e from the fins to the guides 1. By knowing the angle of rotation and the distance to the guides 1, you can determine the coordinate of the strain gauge truck around the perimeter of the track bypass, which allows you to build a plot of forces. Acting on. strainer, both in contact with the supporting surface of the tracked drive, and outside the contact.

The use of this device with a high accuracy provides a constant measurement of the kinematics of movement of a tensile motor along the entire perimeter of a chain of a tracked drive, which is necessary when studying the patency and speed of movement of tracked vehicles in order to develop and create a more advanced design of a tracked drive.

Claims (1)

Invention Formula 1, A device for examining a kinematics of a tracked vehicle, comprising a tracked bypass with a tenade-diometric link, encompassing support rollers, a bracket with a spring-loaded roller fixed in a frame, and position gauges of the tensometric link mounted on a bracket attached to a fixed tenetometric link, distinguished by one tempered link. , in order to increase the accuracy of research and expansion of the field of application, it is equipped with guides attached to the body of the machine along the track, and a second roller, mouth installed in the mentioned guides, with its axis rigidly fixed on the bracket and equipped with the sensor / displacement associated with the sensor of the position of the tensometric Evena 2, The device according to claim 1, about tl And In particular, it is equipped with a contact mechanism for fixing the axles of the road wheels, mounted on the bracket, and counter stops, which are installed on the axes of the road wheels. Sources of information taken into account in the examination 1, USSR Author's Certificate and 548779, cl. G 01 M 17/00, 1975 2, USSR Author's Certificate No. 158499, cl. G 01 And 17/00, 1962 (prototype). figl U / .. RigZ  XxvOv x V / v // h /I 696332 W 5 FIG. FIG. 7