Structural characteristics of bearing end cover

1. Typical bearing end caps

The end cover here belongs to the typical part of the wheel disc. This part is the bearing end cover of the reducer. Because it can pass through, it is also known as the basic body of the through cover bearing end cover. The axial dimension of the two parts of the disc is smaller than the radial dimension. There is a tapered inner hole (cavity) in the cylindrical barrel, and there is no gap on the edge, indicating that the bearing is grease lubricated; the outer cylindrical surface of the cylindrical cylinder matches the bearing housing hole. There are six cylindrical counterbore holes on the disc, which are evenly distributed along the circumference. The function is to install threaded fasteners to connect the bearing end cover and the box body, so it is also called the mounting hole. There is a sealing groove in the circular hole in the center of the disc, which is used to install a felt seal ring to prevent the leakage of lubricating oil in the box and the debris outside the box from intruding into the box.

Second, the role of bearing end cover:

The majority of small and medium-sized reducers use rolling bearings, and the bearing end cover of the rolling bearing is the most common part. The bearing end cover is used to fix the bearing, adjust the bearing gap and withstand the axial force.

3. Structural characteristics of bearing end cover:

The structure of the bearing end cover has two types: embedded and flanged, each of which has a bulky cover and a through cover.
1. The structure of the embedded bearing end cover is simple and compact without the need for fixing screws. The outer diameter is small, the weight is light, and the size of the outer secondary shaft is short. However, it is difficult to install and remove the end cover and adjust the bearing clearance, and the sealing performance is poor. Slotting on the seat hole requires time-consuming processing.

4. The measurement of bearing end cover should be an idea

①It is necessary to use the measuring tool and select the measurement standard correctly, which seems to reduce the measurement error; do not use a more precise measuring tool to measure the rough surface, so as to avoid wear and affect the accuracy of the measuring tool. The size must be measured collectively, and fill in the size value one by one.

②For important dimensions, some must be calculated, such as center distance, center height, gear tooth size, etc., must be accurately measured, and the necessary calculations and checks should be made, and should not be adjusted at will. For less important dimensions on the part (unmachined surface size, machined surface, general size), the measured size value can be rounded to an integer.

③When measuring the size of the worn parts on the parts, the wear value should be considered, refer to the relevant parts or relevant data, and be determined through analysis.

④The standardized structural dimensions on the parts, such as chamfering, filleting, keyway, and thread relief of the sealing groove of the felt ring oil seal, can be determined by consulting the relevant standards.

⑤ The size of the shaft or hole on the part that matches the standard component such as the bearing can be determined by the model lookup table of the standard component. For standard structural elements, after measuring the dimensions, look up the table for standard values.