CN207554570U - A kind of double-row conical bearing structure suitable for being tested around eight words - Google Patents

Abstract

The utility model discloses a double-row tapered roller bearing structure suitable for a figure-of-eight test. Between the outer ring of the bearing and the inner ring of the bearing, the rolling body is placed in the gap between the inner ring of the bearing and the cage, and the cage constrains the rolling The body is on the raceway of the inner ring of the bearing, and the cone angles of the inner ring of the bearing and the outer ring of the bearing are both 20-30°. When the automobile wheel bearing is subjected to the special test around the figure-of-eight or other harsh test conditions, the rolling elements on the left and right sides of the bearing will bear a large alternating axial force. The design of the large cone-angle bearing can effectively improve the rolling elements and The axial bearing capacity of the raceway, the design of the rib with a large groove can reduce the stress concentration of the large rib of the bearing. The utility model can solve the performance hidden dangers of abnormal wear or failure of the existing ordinary double-row tapered roller bearings under the special test conditions around the figure-of-eight, and improve the use requirements of the extreme turning of the wheel bearings, and is especially suitable for high off-road performance requirements. Models, help to avoid the occurrence of bearing failure.

Description

A Double Row Tapered Roller Bearing Structure Applicable to Figure 8 Test

technical field

The utility model relates to a double-row tapered roller bearing, in particular to a double-row tapered roller bearing for a wheel edge which is applicable to the special test condition of the character-eight.

Background technique

Generally, for models that do not require high load-carrying capacity but require high comfort performance (such as cars and SUVs), deep groove ball bearings or hub units with ball rolling elements are generally used as their wheel side bearings. With the market's demand for long wheelbase and wide wheelbase models, the OEMs have more and more demands for wheel side bearings with high load capacity. Double row tapered roller bearings have higher rated dynamic load and relatively Widely used due to low cost.

However, abnormal wear or failure of the bearing often occurs when the complete vehicle with double-row tapered roller bearings with high dynamic load ratings is subjected to the special test around the figure-of-eight; Any abnormal bearing failure occurs. It can be seen that the special test of the figure-of-sight test has very strict requirements on the wheel bearings of automobiles. High-performance vehicles, especially those with outstanding off-road performance, should use double-row tapered roller bearings that can meet the test of the figure-of-sight test.

Contents of the invention

The purpose of the utility model is to solve the problem that ordinary double-row tapered roller bearings cannot meet the requirements of the special test of the figure-of-eight, so as to provide a double-row tapered roller bearing structure suitable for the test of the figure-of-eight.

The technical scheme of the utility model: a double-row tapered roller bearing structure suitable for the figure-of-eight test. Between the outer ring of the bearing and the inner ring of the bearing, the rolling elements are placed in the gap between the inner ring of the bearing and the cage, and the cage The rolling elements are constrained on the raceway of the inner ring of the bearing, and the cone angle of the inner ring of the bearing and the outer ring of the bearing is 20-30°.

Further, the cone angle of the inner ring of the bearing and the outer ring of the bearing is 25°.

Furthermore, the radius of the large rib groove of the inner ring is R1.0mm.

When the wheel bearing of the automobile is subjected to the special test around the figure-of-eight or other harsh test conditions, the rolling elements on the left and right sides of the bearing will bear a large alternating axial force. The design of the large cone-angle bearing can effectively improve the rolling elements and The axial bearing capacity of the raceway, the design of the rib with a large groove can reduce the stress concentration of the large rib of the bearing.

The utility model can solve the performance hidden dangers of abnormal wear or failure of the existing ordinary double-row tapered roller bearings under the special test conditions of the figure-of-eight, and improve the use requirements of the extreme turning of the wheel bearings, and is especially suitable for high off-road performance requirements. Models, help to avoid the occurrence of bearing failure. The utility model is not a simple structural application, but is obtained through experiments and has substantial characteristics.

Description of drawings

Figure 1 is a schematic diagram of the structure of an ordinary double-row tapered roller bearing;

Fig. 2 is a structural schematic diagram of a double-row tapered roller bearing of the present invention;

Fig. 3 is a structural schematic diagram of the inner ring of the double-row tapered roller bearing of the present invention;

Figure 4 shows the stress distribution results of the bearing under the figure-of-eight working condition using ordinary double-row tapered roller bearings;

Fig. 5 is the distribution result of the bearing stress spectrum under the condition of the figure-of-eight using ordinary double-row tapered roller bearings;

Fig. 6 is the stress distribution result of the double-row tapered roller bearing of the utility model under the working condition of the figure-of-eight;

Fig. 7 is the distribution result of bearing stress spectrum under the working condition of the double-row tapered roller bearing of the utility model under the figure-of-eight condition;

In the figure: 1. Bearing inner ring; 2. Rolling elements; 3. Cage; 4. Bearing outer ring.

Detailed ways

In order to describe the technical content, structural features, achieved goals and effects of the present utility model in detail, the following will be described in conjunction with the embodiments and accompanying drawings.

Referring to Figure 2, the rolling element 2 is placed in the gap between the bearing inner ring 1 and the cage 3, and then the cage 3 is riveted with tooling to deform and constrain the rolling element 2 on the raceway of the bearing inner ring 1, and then inserted into the bearing The outer ring 4 completes the assembly of the double row tapered roller bearing.

On the premise of not changing the outer dimensions of the original bearing, the cone angle of the inner and outer rings is increased to 20°~30°;

Refer to Figure 3 to increase the radius of the large rib groove of the inner ring of the bearing from R0.5 to R1.0.

The cone angle of the inner and outer rings is 25°, and the figure-of-eight test of the car is carried out in a continuous turning state. In addition to the inherent radial load, there is also an axial force caused by turning at the wheel side bearing.

Referring to Figures 4 and 5, when ordinary double-row tapered roller bearings are used as wheel bearings, the stress area is mainly concentrated on the large end of the rolling body and stress concentration occurs, and the large end of the rolling body is severely worn and peeled off over time;

Referring to Figures 6 and 7, after adopting the bearing of the present utility model, under the same test conditions, the stressed area of the bearing will be shifted to the middle of the rolling body, effectively avoiding too short of the stressed area and stress concentration at the big end of the rolling body defects, to improve bearing performance in extreme cornering situations.

The above description is only the embodiment of the new model, and does not limit the patent scope of the present utility model. Any equivalent shape or structural transformation made by using the description of the utility model and the contents of the accompanying drawings, or directly or indirectly used in other related technologies Fields are all included in the scope of patent protection of the utility model in the same way.

Claims (3)

1. A double-row tapered roller bearing structure suitable for the figure-of-eight test, between the bearing outer ring (4) and the bearing inner ring (1), the rolling element (2) is placed between the bearing inner ring (1) and the holding In the gap of the frame (3), the cage (3) restrains the rolling elements (2) on the raceway of the bearing inner ring (1), and the characteristic is that the cone angle of the bearing inner ring (1) and the bearing outer ring (4) Both are 20-30°. 2. A double-row tapered roller bearing structure suitable for a figure-of-eight test according to claim 1, characterized in that the cone angles of the bearing inner ring (1) and the bearing outer ring (4) are both 25°. 3. A double-row tapered roller bearing structure suitable for a figure-of-eight test according to claim 1 or 2, characterized in that the radius of the large rib groove on the inner ring of the bearing is R1.0mm.