A kind of inspection tool for bearing bush

Abstract

The invention relates to the technical field of detection, and discloses a detection tool for a bearing bush. The detection tool comprises a pedestal, a bearing bush fixing device, a radial height detection device and a thickness detection device, wherein the bearing bush fixing device comprises a fixing base connected on the pedestal, the fixing base is provided with a semi-cylindrical cambered surface, and a positioning member is arranged on the first side edge of the semi-cylindrical cambered surface; the radial height detection device comprises a push column, a measuring rod and a dial gauge which are sequentially connected, the tail end, which is connected with the measuring rod, of the push column, is further opposite to the second side edge of the semi-cylindrical cambered surface; the thickness detection device comprises a rotation measuring mechanism, and the rotation measuring mechanism comprises a rotating shaft and a thickness sensor connected with the rotating shaft. Through the technical scheme disclosed by the invention, the radial height and the thickness of the bearing bush can be measured at the same time under the condition that the bearing bush is fixed and certain pressure is applied to the bearing bush, errors caused by different skills and techniques of measuring workers can be avoided, and more accurate measuring results can be obtained. In addition, the detection tool is simpler in structure and convenient to be arranged and adjusted.

Description

technical field [0001] The invention relates to the technical field of detection, in particular to a detection tool for a bearing bush. Background technique [0002] The bearing pad is the contact part of the sliding bearing and the journal, and its shape is basically a half-cylindrical surface in the shape of a pad. Taking the engine bearing bush as an example, it is usually divided into upper and lower bushes. When testing bearing pads, the main parameters to be measured are tile thickness and radius height, but due to the structure of the bearing pad itself, there are usually the following technical problems when measuring bearing pads: [0003] 1. The bearing bush is a thin-walled part, which is easy to deform and has a small thickness tolerance. Improper holding force and measuring force of the tooling will affect the measurement accuracy; [0004] 2. There is usually a coating on the surface of the bearing pad, which is a soft alloy, so the measuring force should not...

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Problems solved by technology

[0005] 3. The thickness of the bearing bush is not uniform, so it is usually necessary to measure the thickness at multiple points during measurement. Usually, the measurement points are selected as 25 degrees, 90 degrees and 155 degrees, but the positions of the three measurement points are usually difficult to find accurately;

[0006] 4. The bearing pad will have a certain amount of free opening before it is pressed, that is, the bearing pad is not a semi-cylindrical surface before it is pressed, which will affect the measurement positioning and measurement accuracy;

[0007] 5. Existing measurement methods usually lead to differences in measurement results due to the different skills and techniques of the measurement personnel;

[0008] 6. Although the production of special inspection tools can avoid errors caused by different skills and techniques of measuring personnel to a certain extent, the special inspection tools have poor versatility and can only be used to detect one kind of bearing bush;

[0009] 7. Although the automatic measuring equipment on the bearing bush processing machine tool can overcome the above defects, the equipment cost is relatively high

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