High-speed low-vibration deep groove ball bearing

Abstract

The utility model discloses a high-speed low-vibration deep groove ball bearing, which is applied to the technical field of deep groove ball bearings, and is characterized by comprising an inner ring, an outer ring, a plurality of rolling balls and a retainer arranged between the inner ring and the outer ring, an outer raceway is formed in the center of the inner ring surface of the outer ring, an inner raceway is formed in the center of the outer ring surface of the inner ring, the meshing degree OSCE of the outer ring is equal to the radius re of the outer raceway divided by the diameter Dw of the rolling ball, the meshing degree OSCI of the inner ring is equal to the radius ri of the inner raceway divided by the diameter Dw of the rolling ball, the meshing degree OSCE of the outer ring is arranged between 0.545 and 0.56, and the meshing degree OSCI of the inner ring is arranged between 0.515 and 0.525. The clearance grade of the deep groove ball bearing is between C2-C4, and the diameter Dw of the rolling ball is between (0.4-0.5) * (D-d) / 2; the bearing has the technical effects that heat and vibration generated during high-speed rotation are reduced, and the service life of the bearing is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to deep groove ball bearing technical field, especially a kind of high-speed low vibration deep groove ball bearing. BACKGROUND

[0002] In new energy automobile of automobile, its power assembly is improved by using deep groove ball bearing, but because the relative rotation speed of outer ring and inner ring is increased, the heat and vibration generated by rolling element rolling on raceway are also greatly increased, thereby greatly reducing the service life of deep groove ball bearing, so a new design is needed to ensure that bearing has stable and reliable performance. UTILITY MODEL CONTENT

[0003] The utility model aims at providing a kind of high-speed low vibration deep groove ball bearing, its advantage is to reduce the heat and vibration generated when high-speed rotating, improve the service life of bearing.

[0004] The above technical purpose of the utility model is realized by the following technical scheme: a kind of high-speed low vibration deep groove ball bearing, including inner ring, outer ring, several rolling balls and the retainer arranged between the inner ring and the outer ring;The outer raceway is set in the middle of the inner face of the outer ring, the inner raceway is set in the middle of the outer face of the inner ring, and the outer ring engagement degree OSCE is equal to the outer raceway radius re divided by the rolling ball diameter D w , and the inner ring engagement degree OSCE is equal to the inner raceway radius ri divided by the rolling ball diameter D w , the outer ring engagement degree OSCE is set between 0.545-0.56, the inner ring engagement degree OSCE is set between 0.515-0.525, the deep groove ball bearing clearance grade is between C2-C4, and the diameter D w Of the rolling ball is between (0.4-0.5) × (D-d) / 2.

[0005] The utility model is further provided as follows: the inner ring and the outer ring are made of bearing steel with hardness between HRC60-65.

[0006] The utility model is further provided as follows: the rolling ball is made of bearing steel or silicon nitride material with hardness between HRC60-65.

[0007] The utility model is further provided as follows: the retainer is made of steel retainer or plastic crown retainer.

[0008] In summary, the utility model has the following beneficial effects:

[0009] 1. The outer ring engagement degree OSCE is set between 0.545-0.56, the inner ring engagement degree OSCI is set between 0.515-0.525, thereby reducing the heat and vibration generated by the deep groove ball bearing when rotating at high speed, at the same time setting the deep groove ball bearing clearance grade in the range of C2-C4, and setting the inner ring and outer ring to be made of high hardness bearing steel material, and the rolling ball to be made of high hardness bearing steel or silicon nitride material, so as to prolong the service life of the bearing by reducing the gyroscopic moment, improving the rigidity and prolonging the fatigue life. BRIEF DESCRIPTION OF DRAWINGS

[0010] Fig. 1 is the structure schematic view of the whole of the embodiment;

[0011] Fig. 2 is the structure sectional view of the whole of the embodiment.

[0012] Reference signs: 1, inner ring; 2, outer ring; 3, rolling ball; 4, retainer; 5, outer raceway; 6, inner raceway. DETAILED DESCRIPTION

[0013] The utility model will be further explained in detail in combination with the drawings.

[0014] Embodiment:

[0015] Reference Figs. 1-2The application discloses a high-speed low-vibration deep groove ball bearing, which comprises an inner ring 1, an outer ring 2, a plurality of rolling balls 3 and a retainer 4 arranged between the inner ring 1 and the outer ring 2, wherein a outer raceway 5 is arranged in the middle of an inner ring surface of the outer ring 2, an inner raceway 6 is arranged in the middle of an outer ring surface of the inner ring 1, the radius of the outer raceway 5 is re, the radius of the raceway is ri, the diameter of the rolling ball 3 is Dw, the outer diameter of the outer ring 2 is D, the inner diameter of the inner ring 1 is d, the outer ring engagement degree OSCE is equal to the radius re of the outer raceway 5 divided by the diameter Dw of the rolling ball 3, the inner ring engagement degree OSCi is equal to the radius ri of the inner raceway 6 divided by the diameter Dw of the rolling ball 3, the outer ring engagement degree OSCE is arranged between 0.545 and 0.56, the inner ring engagement degree OSCi is arranged between 0.515 and 0.525, the bearing clearance grade of the deep groove ball bearing is between C2 and C4, and the diameter Dw of the rolling ball 3 is between (0.4-0.5) x (D-d) / 2, so that the heat and vibration generated by the deep groove ball bearing during high-speed rotation are reduced, and the gyroscopic moment of the deep groove ball bearing during high-speed rotation is reduced. In the embodiment, the inner ring 1 and the outer ring 2 are made of bearing steel with a hardness of HRC 60-65, the rolling ball 3 is made of bearing steel or silicon nitride material with a hardness of HRC 60-65, and the retainer 4 is made of a steel retainer 4 or a plastic crown retainer 4, so that the rigidity of the deep groove ball bearing is improved, the fatigue life of the deep groove ball bearing is prolonged, and the service life of the deep groove ball bearing under high-speed rotation is improved. In a standard application scenario, the design concept of a low-speed heavy-load bearing is to ensure high bearing capacity because the speed is relatively low, but a low-to-very-high load change is generated, the bearing is ensured to be within the range of 0.51-0.53 by calculating the range of OSCi and OSCE, the disadvantage of this design is that the high power loss and the heat generated at high speed limit the achievable speed, and in a high-speed application scenario, low friction is usually required, and a large load is not expected, and the prior art is usually achieved by keeping the range of OSCi and OSCE within the range of 0.53-0.57, but the disadvantage of this design is that the bearing has a short fatigue life under high load conditions, and the application limits the range of OSCi and OSCE to reduce the heat and vibration generated by the deep groove ball bearing during high-speed rotation, so that the deep groove ball bearing can adapt to the bearing use requirement of a high-speed motor under the condition of 40,000 revolutions per minute or higher.

[0016] The use principle is briefly described as follows: the outer ring engagement degree OSCE is arranged between 0.545 and 0.56, the inner ring engagement degree OSCi is arranged between 0.515 and 0.525, so that the heat and vibration generated by the deep groove ball bearing during high-speed rotation are reduced, and the service life of the bearing is improved by reducing the gyroscopic moment, improving the rigidity and prolonging the fatigue life.

[0017] The specific embodiment is only an explanation of the utility model, and is not a limitation of the utility model. A person skilled in the art can make a modification with creative contribution according to the need after reading the specification, and as long as the modification is within the scope of the claims of the utility model, the modification is protected by the patent law.

Claims

1. A high-speed low-vibration deep groove ball bearing comprising an inner ring (1), an outer ring (2), a number of balls (3) and a cage (4) arranged between the inner ring (1) and the outer ring (2); characterized in that, The inner ring face of the outer ring (2) is centrally provided with an outer raceway (5), and the outer ring face of the inner ring (1) is centrally provided with an inner raceway (6), the outer ring engagement degree OSCE is equal to the radius re of the outer raceway (5) divided by the diameter Dw of the rolling ball (3), the inner ring engagement degree OSCI is equal to the radius ri of the inner raceway (6) divided by the diameter Dw of the rolling ball (3), the outer ring engagement degree OSCE is set between 0.545-0.56, the inner ring engagement degree OSCI is set between 0.515-0.525, the deep groove ball bearing clearance grade is between C2-C4, and the diameter Dw of the rolling ball (3) is between (0.4-0.5) x (D-d) / 2.

2. The high speed low vibration deep groove ball bearing according to claim 1, wherein, The inner ring (1) and the outer ring (2) are made of bearing steel with a hardness between HRC 60-65.

3. The high speed low vibration deep groove ball bearing of claim 1, wherein, The rolling ball (3) is made of bearing steel with a hardness between HRC 60-65 or is a silicon nitride material.

4. The high speed low vibration deep groove ball bearing of claim 1, wherein, The retainer (4) is a steel retainer (4) or a plastic crown retainer (4).

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