A detection method for axial negative clearance of hub bearing
A wheel hub bearing and detection method technology, applied in the direction of mechanical bearing testing, measuring devices, instruments, etc., can solve the problem of direct measurement of bearing units that cannot be axially preloaded, affecting the quality and service life of wheel hub bearing products, and the accuracy of measurement results No advanced problems, to achieve the effect of fast and convenient detection process, reliable detection results and high accuracy
Active Publication Date: 2020-07-31
新昌浙江工业大学科学技术研究院
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Problems solved by technology
However, the existing measurement methods cannot directly measure the negative clearance of the bearing unit with axial preload. Various indirect measurement methods are cumbersome to operate, and the accuracy of the measurement results is not high, which seriously affects the products of hub bearings. quality and service life
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[0020] Such as Figure 1-3 As shown, the wheel hub bearing axial negative clearance detection method of the present invention is to assemble the first inner ring 1, the second inner ring 2, the outer ring 3, the cage 6 and the ball 4 during the assembly process of the wheel hub bearing. After the hub bearing assembly unit is formed, the hub bearing assembly unit is fixed on the detection device 5 to detect axial negative clearance;
[0021] The detection device 5 includes a lifting and lowering plate mechanism 51, a turntable 52 and a base 53 arranged concentrically from top to bottom; the turntable 52 includes a hollow cylinder 521, and the bottom and top of the hollow cylinder 521 are respectively provided with bottom plates 523 and a top plate 525; the bottom plate 523 and the base 53 are connected by the first arc guide rail 54, so that the rotary table 52 can rotate with a fixed axis relative to the base 53; ;
[0022] Described rotation mechanism 58 comprises transmiss...
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The detection method of the negative axial clearance of the wheel hub bearing: 1) Install the assembled wheel hub bearing assembly unit on the detection device, and then the first cylinder drives the chassis to rise. A pressure plate is installed on the chassis to clamp the outer ring; 2) The second cylinder drives the annular pressure plate to press down, and a constant downward pressure is applied to the first inner ring; 3) Start the motor to drive the outer ring to rotate, and then the first cylinder drives the outer ring to rotate. Drive the outer ring down to the lowest position, and then drive the outer ring to the highest position by the first cylinder, and record the displacement L1 that occurs during the rising process of the outer ring; 4) Press the first inner ring in the axial direction, so that the first inner ring and the The second inner ring contacts, record the displacement L2 of the first inner ring during the pressing process; 5) If L1 ≥ L2, there is no negative clearance, and it is directly judged as unqualified, replace the first inner ring, and re-test; if L1 <L2, the negative clearance value is L1‑L2. If the negative clearance value does not meet the requirements, replace the first inner ring and re-test.
Description
technical field [0001] The invention belongs to the wheel hub bearing detection technology, in particular to a detection method for the axial negative clearance of the wheel hub bearing. Background technique [0002] Axial negative clearance is of great significance to the service life of automobile hub bearings. Studies have shown that the interference formed by a reasonable axial negative clearance can improve the bearing capacity of the hub bearing and provide a reserve for the wear of the bearing during use, thereby greatly improving the service life of the hub bearing. However, excessive negative clearance will sharply increase the calorific value of the bearing when it is working, which will cause the bearing to swell and cause the bearing to be damaged soon. It can be seen that the axial negative clearance of the hub bearing needs to be kept within an appropriate range, so its true value needs to be accurately measured. [0003] At present, in the bearing industry, ...
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IPC IPC(8): G01B21/16G01M13/04B07C5/12B07C5/34
CPCB07C5/12G01B21/16
Inventor 袁巨龙吕迅周见行张万辉王志毫
Owner 新昌浙江工业大学科学技术研究院