Thrust roller for preventing machine from deflecting by auto-adapting position of wheel and diameter of tyres for roller test stand

Abstract

The invention relates to a vehicle-deflection preventing catch wheel for a roller test bench and adapted to wheel location and tire diameter automatically, mainly including that: a ground guide rail portion is fixed on the ground, a sliding plate of a sliding plate portion is slideably matched with the ground guide rail portion; a worm wheel decelerator of an electrical motor worm wheel decelerator portion is driven by an electrical motor, is fixed on the sliding plate, and is meshed, via a gear over an output shaft thereof, with a rack that is fixed on a ground guide rail soleplate; a speed regulating motor and a ball screw portion are mounted on the sliding plate, the speed regulating motor drives the ball screw to rotate, a ball screw nut in a rotary arm portion is movable over the ball screw, a fork-shaped rotary arm rotates around a rotary shaft of a square screw nut sleeve that clamps the ball screw nut so as to cause a bearing rotary shaft in a bearing support to rotate, and to cause the catch wheel and the catch wheel in sensor portion to rotate. The inventive objective lies in a technical proposal that is proposed for the purpose of chiefly solving unstable operation of current front-wheel driven vehicle on the roller test bench.

Description

technical field [0001] The invention belongs to a protection device for automobiles when performing performance testing on a roller test stand, in particular to a protection device for preventing the steering wheel of a front-wheel drive vehicle from running off when being tested on a roller test stand. Background technique [0002] With the rapid development of my country's transportation industry, the number of vehicles is increasing, and there are more and more traffic accidents caused by the deterioration of the technical condition of the vehicles. It must be done. According to the national standard, the automobile inspection department should inspect the speedometer, odometer and wheel output power of the vehicle. Therefore, when the vehicle is tested on the roller test stand (such as speed test stand, chassis dynamometer, etc.), it needs to run stably at a high speed (40km / h----120km / h) for a long time. Next, the moment acting on the wheel mainly includes two parts of...

AI Technical Summary

Problems solved by technology

[0003] At present, there are three main ways to prevent the car from swaying on the domestic roller inspection table: the most primitive method is to tie the car to the ring on the ground with a rope, which has a large positioning error, is not reliable, takes a long time and is inefficient.

Later, it developed into a socket type. There is a row of slots at the front end of the roller test bench. The retaining wheel is inserted into different slots according to the wheelbase of the vehicle. This method is not accurate in positioning and cannot be fixed according to the different widths of the car. , the car still has side-slip space

At present, the latest research result is the automatic stop wheel. The main part of the device is in the foundation, and the underground motor drives the chain to run. Driven by the chain, the stop wheel moves along the frame guide rail, which brings inconvenience to the installation, commissioning and maintenance of the equipment. , and the installation time is long, and the efficiency is low; the retaining wheel is blocked at the lower part of the side of the wheel. Figure 15 ), when the front edge of the wheel touches the front-end automatic gear wheel, the front-end automatic gear wheel exerts a force Fx on the wheel, and Fx acts below the kingpin axis to generate a deflection moment M, which is the same as the deflection direction of the wheel, which intensifies the deflection of the wheel , and the back-end retaining wheel is not in contact with the wheel, and has no effect, so the design of the retaining wheel position is unreasonable; and the retaining wheel stops after touching the wheel, and the retaining wheel is always in contact with the vehicle, resulting in unnecessary friction. error occurs when measuring power

Practice has proved that the above methods are not accurate enough for measurement

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