Tractor PTO testbed with speed raising box

Abstract

The present invention discloses a tractor PTO testbed with a speed raising box, belonging to the technical field of tractor test. The tractor PTO testbed with speed raising box comprises a dynamometer, a test end of the dynamometer is connected with a speed raising box used for speed increasing and twisting reduction, the speed raising box is connected with a universal coupler connected with an output shaft of a tractor test piece, and the lower portion of the dynamometer is provided with a lifting device configured to regulate the level heights of the speed raising box and the dynamometer. The speed raising box is added to increase the rotation speed of the output shaft of the tractor test piece and reduce the torque so as to reduce the measuring range requirement corresponding to the dynamometer and reduce the usage cost of the dynamometer, and the lifting device is increased to allow the universal coupler to be maintained on the same plane for working so as to avoid the influence ofthe large inclination angle on the test result and the potential safety hazard.

Description

technical field [0001] The invention relates to a tractor test stand, in particular to a tractor PTO test stand with a gearbox. Background technique [0002] PTO test bench is an important equipment for tractor product development and test verification, "DG / T001 Agricultural Machinery Promotion Appraisal Outline: Agricultural Wheeled and Crawler Tractors" and "GB / T 3871.3 Agricultural Tractor Test Regulations Part 3: Power Output Shaft Power Test" The power test of the medium PTO shaft needs to be tested on the tractor PTO test bench. Accurate and rapid tractor power output shaft power test is of great significance for evaluating the tractor's power performance, economy and vehicle design effect. [0003] The existing test scheme is that the PTO shaft of the tractor is directly connected to the dynamometer, which has high requirements for the power and torque range of the dynamometer at low speed. Generally, only the DC power dynamometer can meet the requirements, and the c...

AI Technical Summary

Problems solved by technology

[0003] The existing test scheme is that the PTO shaft of the tractor is directly connected to the dynamometer, which has high requirements for the power and torque range of the dynamometer at low speed. Generally, only the DC power dynamometer can meet the requirements, and the cost is high; at the same time, the dynamometer directly Installed on a fixed base, it cannot adjust the height up and down, and cannot adapt to the change of the output shaft height of various tractor models.

However, since the height of the dynamometer cannot be adjusted, if the height difference between the output shaft of the tractor PTO and the input shaft of the dynamometer is large, the angle between the coupling connected to the two will be large, posing a safety hazard

The above factors lead to the high cost of the existing technology, and there are few tractor models suitable for measurement

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