Zhejiang province's first commercial vehicle hub bearing unit "made in Zhejiang" standard has been implemented

Recently, the group standard of "made in Zhejiang" for "hub bearing unit of Commercial Vehicle" , which is led by Zhejiang Standardization Institute and drafted by Zhejiang Zhaofeng Electromechanical Co. , Ltd. , will be implemented from October 31. According to reports, this is also the first commercial vehicle hub bearing units in Zhejiang Province, "Zhejiang Manufacturing" standards, filling the bus, semi-trailer, trucks and other commercial vehicle hub bearing units of the standard blank.

According to the introduction, the hub bearing unit is one of the important parts of the automobile bearing and rotation, and its manufacturing accuracy is directly related to the overall quality of the automobile. At present, there are no international standards for automotive bearings or hub bearings. Although China has issued nearly 20 national and industry standards, for commercial hub bearing units with multiple load, the technical specifications and test methods in the existing standards are not applicable.

The standards "made in Zhejiang" for "commercial vehicle hub bearing units" , which have been implemented since today, are based on national and industry standards such as "rolling bearings, automotive hub bearing units" , more prominent security, sealing, temperature resistance and applicability.

In terms of safety, referring to Skf, Shaeffler and other internationally recognized advanced enterprise standards, it is stipulated that the axial run-out of the ABS encoder is not more than 0.20 mm and the bolts of key components can withstand 50 hours of neutral salt spray test Compared with the products of international famous brands, it is pointed out that the parallel difference of the sealing ring is not more than 0.15 mm, the middle seal can bear 0.2 MPA oil pressure load test and there is no oil leakage in the Middle The heat resistance of the rubber seal ring was increased from 150 °C to 200 °c by the industry standard, and the softening temperature of the key component holder and the oil separation characteristic of the grease were increased According to the working conditions of commercial vehicle hub bearing, the load spectrum and other test conditions are re-regulated, and for the items without standard test methods, the existing methods of international advanced enterprises are required to be referred to The test methods, such as sealing ring, screw thread, angle clearance, mud splash and bench life, are further clarified.

The Standard Review experts pointed out that the standard has widely solicited and adopted the opinions and suggestions of hub bearing manufacturers, hub bearing suppliers and, in particular, automobile engine manufacturers during the preparation process Combined with the current situation and development direction of automobile hub bearing industry, the index setting can be verified and tested, the test method is reasonable and standardized, the standard is strong, and it can be transformed into the implementation details of certification Will be the province and even the national hub bearing unit industry transformation and upgrading to provide a new benchmark.