SU1437723A1 - Bed for investigating tractive-cohesion properties of wheeled propelling gear - Google Patents

Abstract

The invention relates to a test technique and can be used in studies of the traction properties of a wheel drive for different types of road surface. The purpose of the invention is to increase the reproduction accuracy of operational 5 / IfSrOS B 71 modes of wheel drive operation. On the support table 1 is mounted test wheel propulsion, along the axis of which is pivotally mounted rigidly interconnected vertical rods. 20 with loads 23 and longitudinal bars. The longitudinal bars by means of a transverse beam are connected to a dynamometer 9 connected to the support post 13. A driven drum is mounted on the axis and connected by a cable 18 with a lead drum. As the lead drum rotates in the cable 18, a force is created which causes the wheel propulsion to rotate. The dynamometer records the driving force developed by the wheel propulsion. The measurement results determine the adhesion coefficient of the wheel drive on this type of road surface. 4 il. from sl 7 W 24 G5 I V g5 4 so - xy 00

Description

ten

ts

20

11437723

The invention relates to a test technique and can be used in studies of the t-tractive properties of a wheeled vehicle on various types of pavement,.

The purpose of the invention is to increase the reproduction accuracy of the operating modes of the wheel motor.

Figure 1 shows the stand, the general view; figure 2 is the same, top view; on fig.Z - section A-L in figure 1; figure 4 - design scheme of the stand.

The stand contains a support table 1 with a simulator 2 of the road surface in the outer plates made of various materials. On the simulator 2 of the pavement, a tested forest ground mover is installed, including two wheels 3 fixed by nuts 4 on axis 5. On axis 5 but both sides of wheel 3 two longitudinal bars b are articulated, connected with the co - a fight with a transverse beam 7. The 25 first timber 7 is connected with the spring-loaded part 8 of the dynamometer, the housing 9 of which is regulated by means of the adjustable rod 10 and is connected to the screw 11, which interacts with the nut 12 installed in the fixed support pole 13. At the opposite end of the table 1 is equipped with a leading drum 14, associated with A water cannon made in the form of a worm gear 15, on the shaft of which a handle 16 is fixed. A shaft 17 is fixedly connected to the shaft 5, mounted between the wheels. The master 14 and the slave 17 drums are covered by an open cable transmission 18. Pa the supporting table 1 but both sides of the wheels 3 are made through the longitudinal grooves. 19, in which vertical rods 20 are mounted, sharfically mounted by bearings 21 on axis 5. Vertical rods 20 are interconnected by a transverse bar 22 on which weights 23 are suspended. Leading drum 14 and drive mechanism are mounted on a fixed bracket 24 having vertical grooves 25 for adjusting the height of the driving drum 14.

Using screw 11 and vertical caps of grooves 25, parallelism is established between the surface of the road simulator 2 and the longitudinal bars 6 and the cable 18. With

thirty

35

40

45

50

55

Ru time of day on the crea- tion of the roof of the sea and, right before two, but at the same time, next to the right

we are not

F

SC with to Ki

0

s

0

five

0

five

0

five

0

five

the handles 1b and the worm gearbox 15 driving drum 14 are brought into play. The force generated in the rope 18 creates on the driven drum 17 and, accordingly, on the wheels 3, a sharp moment, under the action of which the wheels 3 roll over the surface of the pavement simulator 2, thereby creating traction resistance recorded by a dynamometer. As the force in the rope 18 increases, the torque applied to the wheels 3 and, accordingly, the thrust load, is applied to the axle 5 of the wheel drive, which leads to an increase in slippage in the process of rolling the wheel drive. With a certain force in the rope 18, the translational movement of the axis 5 is stopped, and winding the rope 18 from the driven drum 17 onto the driving drum 14 occurs when the wheel drive is completely skidded. According to the readings of the dynamometer, the amount of drag developed by the wheel propulsion on this type of road surface and a given vertical load with full skidding is set. According to the results of known dependencies, the coherence of the adhesion of a wheeled propulsion wheel is determined. The experiments were carried out at different weights of loads 23. According to the results of measurements, the dependence of the maximum tractive effort and the coefficient of adhesion of the wheel drive on this type of road surface on the vertical load applied (to the axis of the wheel drive) is determined.

Thus, in the proposed stand, when studying t-coupling properties, a torque is applied directly to the wheels of the drive and traction resistance to the axis of the drive, which improves the accuracy of reproducing the operating modes of the wheel drive.

Claims (2)

Invention Formula t. Stand for the study of wheel traction wheel propulsion, containing a support table with a go-south cover simulator, an axis for mounting the tested propulsor, two longitudinal bars hinged on an axis on both sides of the test propulsor and interconnected by a transverse beam, cable transmission with a leading drum, kinematically connected to a drive mechanism, and a dynamometer, characterized in that, in order to improve the reproduction accuracy of the operational modes of operation of the wheel drive, it provides wives driven slave rigidly mounted on an axis coaxially wheel propulsion and 1437723 covered by a cable drive, made open, and a fixed support stand, while the dynamometer is installed between the fixed support stand and the transverse beam. 2. The stand according to claim 1, characterized in that in the supporting table on both. The sides of the tested wheel drive are made through longitudinal grooves in which vertical rods with weights are hinged mounted on the axle and rigidly connected with the longitudinal bars. /" /five J9 FIG. 2 // / (7 / S & FIG 205 7 78