CN212106623U - Long-life tapered roller bearing - Google Patents
Long-life tapered roller bearing Download PDFInfo
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- CN212106623U CN212106623U CN201922204205.2U CN201922204205U CN212106623U CN 212106623 U CN212106623 U CN 212106623U CN 201922204205 U CN201922204205 U CN 201922204205U CN 212106623 U CN212106623 U CN 212106623U
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Abstract
The utility model provides a long-life tapered roller bearing, relates to the bearing field, including bearing inner race, the roller, holder and bearing inner race, roller and holder cooperation, all assemble in bearing inner race, between the bearing inner race, the cave of the big terminal surface of roller is located the outside of the big flange of bearing inner race, and the length of cave is 1/3 of roller main aspects diameter, the upper end chamfer control of the big flange of bearing inner race is 0.3~0.55mm, the degree of depth size of bearing inner race oil groove is 0.4~0.5mm, the opening width size of oil groove is: the large flange side is 0.8-0.95 mm, the roller side is 1.2-1.4 mm, and the length of the large flange is 2.2-2.3 mm; the utility model discloses simple structure, improved tapered roller bearing's life greatly.
Description
Technical Field
The utility model belongs to the technical field of the bearing and specifically relates to a long-life tapered roller bearing is related to.
Background
As is known, the tapered roller bearing is a core part in the equipment manufacturing industry and the automobile industry, and with the improvement of the technical equipment level, the performance requirement of a host machine factory on the tapered roller bearing is higher and higher. Among various performance parameter indexes, the requirements of long service life and high stability are particularly outstanding; the existing tapered roller has a certain difference from the design requirement in the aspect of control of the spherical base surface SR, and the roller big end surface recess is arranged inside the flange according to the existing design, so that stress is concentrated on the edge of the roller recess when the SR is small and the angle deviation of the flange is overlapped, the defect can lead to abnormal abrasion of the inner ring big flange and early failure of the roller spherical base surface, and the service life of the bearing cannot meet the requirement.
Disclosure of Invention
In order to overcome the deficiency in the background art, the utility model discloses a long-life tapered roller bearing.
In order to realize the purpose, the utility model adopts the following technical scheme:
the utility model provides a long-life tapered roller bearing, including bearing inner race, the roller, holder and bearing inner race, the roller cooperates with the holder, all assemble in bearing inner race, between the bearing inner race, the cave of the big terminal surface of roller is located the outside of the big flange of bearing inner race, and the length of cave is 1/3 of roller main aspects diameter, the upper end chamfer control of the big flange of bearing inner race is at 0.3~0.55mm, the degree of depth size of bearing inner race oil groove is 0.4~0.5mm, the opening width size of oil groove is: the side of the large flange is 0.8-0.95 mm, the side of the roller way is 1.2-1.4 mm, and the length of the large flange is 2.2-2.3 mm.
Since the technical scheme is used, the utility model discloses following beneficial effect has:
the long-life tapered roller bearing of the utility model avoids the problems of abnormal abrasion of the large flange of the inner ring and advanced failure of the ball base surface of the roller caused by stress concentration at the edge of the recess easily caused by small SR by arranging the recess of the large end surface of the roller outside the large flange of the bearing inner ring; the size of the oil groove is controlled, so that the effective contact length of the roller path is increased, and the service life of the product is prolonged; the utility model discloses simple structure, improved tapered roller bearing's life greatly.
Drawings
Fig. 1 is a schematic structural diagram of the present invention;
FIG. 2 is a schematic structural view of the oil gallery of the present invention;
in the figure: 1. a bearing outer race; 2. a roller; 3. a pocket; 4. a holder; 5. a bearing inner race; 6. chamfering; 7. an oil ditch; 8. and (4) large flanges.
Detailed Description
The invention will be explained in more detail by the following examples, which disclose the invention and are intended to protect all technical improvements within the scope of the invention.
Combine attached figure 1-2 long-life tapered roller bearing, including bearing inner race 1, roller 2, holder 4 and bearing inner race 5, roller 2 and holder 4 cooperation, all assemble in bearing inner race 1, between the bearing inner race 5, the cave 3 of the big terminal surface of roller 2 is located the outside of 5 big flanges of bearing inner race 8, and the length of cave 3 is 1/3 of 2 big end diameters of roller, the upper end chamfer 6 control of 5 big flanges of bearing inner race 8 is at 0.3~0.55mm, the degree of depth size of 5 oil grooves 7 of bearing inner race is 0.4~0.5mm, the opening width size of oil grooves 7 is: the side of the large flange 8 is 0.8-0.95 mm, the side of the roller way is 1.2-1.4 mm, and the length of the large flange 8 is 2.2-2.3 mm.
The long-life tapered roller bearing of the utility model is implemented, for example, with an inner diameter = phi 110mm, an outer diameter = phi 170mm, and a long-life tapered roller bearing with a high assembly height T =47mm, the service life test required by a common bearing meets 1L10h, and the service life test required by a high-quality bearing meets 3L10 h;
the material of the utility model is special grade high quality bearing steel, the bearing outer ring 1 adopts salt furnace quenching and tempering, the martensite is 2-3 grade, the troostite is less than or equal to 1 grade, the degerming carbon is less than or equal to 0.02mm, zero decarburization is ensured, the residual austenite can be less than or equal to 5 percent according to the use requirement, the hardness can meet the requirement of the existing standard, and the deformation of the product after grinding is zero; the bearing inner ring 5 is subjected to carbonitriding quenching tempering, the martensite is 1-4 grade, the troostite is not more than 1 grade, the depth of a carbonitriding layer of a ground working surface is 0.12-0.30 mm, an oil groove 7 at the bottom of a large flange of the bearing inner ring 5 is processed by a standard blade, and the opening size is controlled as follows: the large flange side is 0.8-0.95 mm, the raceway side is 1.2-1.4 mm, the chamfer angle of the upper end of the large flange of the bearing inner ring 5 is controlled within 0.3-0.55 mm, the large end surface recess 3 of the roller 2 is positioned outside the large flange, and the roller SR is tangent to the large flange 8, so that stress concentration is avoided; the bearing reaches a timing truncation experiment of 5.5L10h, a product after disassembly is not abnormal, and the appearance, the precision and the like can still meet the requirements.
The part of the utility model not detailed is prior art.
The embodiments selected for the purpose of disclosing the invention, are presently considered to be suitable, it being understood, however, that the invention is intended to cover all variations and modifications of the embodiments, which fall within the scope of the concept and the utility model.
Claims (1)
1. The utility model provides a long-life tapered roller bearing, includes bearing inner race, roller, holder and bearing inner race, characterized by: roller and holder cooperation all assemble between bearing inner race, and the cave of the big terminal surface of roller is located the outside of the big flange of bearing inner race, and the length of cave is 1/3 of the big end diameter of roller, and the upper end chamfer control of the big flange of bearing inner race is at 0.3~0.55mm, and the degree of depth size of bearing inner race oil groove is 0.4~0.5mm, and the opening width size of oil groove is: the side of the large flange is 0.8-0.95 mm, the side of the roller way is 1.2-1.4 mm, and the length of the large flange is 2.2-2.3 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922204205.2U CN212106623U (en) | 2019-12-11 | 2019-12-11 | Long-life tapered roller bearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922204205.2U CN212106623U (en) | 2019-12-11 | 2019-12-11 | Long-life tapered roller bearing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212106623U true CN212106623U (en) | 2020-12-08 |
Family
ID=73620739
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922204205.2U Active CN212106623U (en) | 2019-12-11 | 2019-12-11 | Long-life tapered roller bearing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212106623U (en) |
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2019
- 2019-12-11 CN CN201922204205.2U patent/CN212106623U/en active Active
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