Efficient lubrication angular contact ball bearing

Abstract

The utility model discloses an efficient lubrication angular contact ball bearing and relates to the technical field of bearings. The utility model relates to a high-speed precise angular contact ball bearing, and aims to solve the problems that the existing high-speed precise angular contact ball bearing is relatively high in friction and relatively poor in lubricating effect generated in the operation process of a retainer and a steel ball due to the fact that lubricating oil cannot continuously enter a raceway of an outer ring of the bearing, so that the temperature of the bearing is increased, serious abrasion is generated, and the working stability of the bearing is relatively poor. A groove channel with a semicircular section is machined in the middle of the outer surface of the inner ring, an annular oil inlet groove is machined in one end face of the inner ring in the circumferential direction, and three oil inlet holes are evenly machined in the inner surface of the semicircular groove channel in the outer surface of the inner ring in the circumferential direction. The inner surface of the inner ring is sleeved with an outer ring, a retainer is arranged between the inner surface of the outer ring and the outer surface of the inner ring, and a steel ball is arranged in each pocket in the retainer. The bearing is suitable for the field of bearings.

Description

Technical Field

[0001] The utility model relates to the technical field of bearings, in particular to a high-efficiency lubricating angular contact ball bearing. Background Art

[0002] At present, high-speed precision angular contact ball bearings have the characteristics of high precision, high speed, low noise and low vibration, and are mainly used in machine tool electric spindles. According to its characteristics, the guidance method of high-speed angular contact ball bearings for electric spindles is generally external guidance, because when the bearing is used and installed, the outer ring is generally stationary, and the outer ring guidance makes it easier for lubricating oil to enter the guide surface and raceway.

[0003] The existing high-speed precision angular contact ball bearings cannot continuously enter the outer ring raceway of the bearing, resulting in greater friction between the cage and the steel balls during operation and poor lubrication effect, which leads to increased bearing temperature and severe wear, and further causes poor bearing working stability. Utility Model Content

[0004] The utility model proposes a high-efficiency lubricated angular contact ball bearing to solve the problem that the existing high-speed precision angular contact ball bearing cannot continuously enter the outer ring raceway of the bearing, resulting in greater friction between the cage and the steel ball during operation and poor lubrication effect, which leads to increased bearing temperature and severe wear, and further leads to poor working stability of the bearing.

[0005] The utility model discloses a high-efficiency lubricating angular contact ball bearing, the specific structure of which includes an outer ring 1, an inner ring 2, a steel ball 3 and a retaining frame 4;

[0006] A semicircular groove channel with a cross section is processed in the middle of the outer surface of the inner ring 2, and an annular oil inlet groove 2-1 is processed along the circumferential direction on one end face of the inner ring 2, and n oil inlet holes 2-2 are uniformly processed on the inner surface of the semicircular groove channel on the outer surface of the inner ring 2 along the circumferential direction, where n is a positive integer, and the interior of the semicircular groove channel on the inner ring 2 is connected to the interior of the annular oil inlet groove 2-1 through the oil inlet hole 2-2, an outer ring 1 is sleeved on the outer surface of the inner ring 2, a retainer 4 is provided between the inner surface of the outer ring 1 and the outer surface of the inner ring 2, and a steel ball 3 is provided inside each pocket of the retainer 4;

[0007] Furthermore, a plurality of guide surface lubrication grooves 4 - 1 are evenly arranged on the outer surface of the retainer 4 along the circumferential direction;

[0008] Furthermore, the guide surface lubrication groove 4-1 on the outer surface of the retainer 4 is arranged corresponding to the pocket hole;

[0009] Furthermore, a gap is provided between the outer diameter of the retainer 4 and the large rib close to the outer ring 1, and the gap is 0.2 mm;

[0010] Furthermore, the number n of the oil inlet holes 2-2 is 3≤n≤10;

[0011] Furthermore, the annular oil inlet groove 2-1 is arranged on the non-pressure point end surface of the inner ring 2;

[0012] Furthermore, the lubrication of the angular contact ball bearing plays a key role when the electric spindle is running at high speed. The improvement of the lubrication method and the improvement of the lubrication effect can increase the service life of the bearing. The annular oil inlet groove 2-1 is designed on the end face of the inner ring 2, which can facilitate the oil and gas to enter the bearing directly into the semicircular groove channel on the outer surface of the inner ring 2. The annular oil inlet groove 2-1 is set on the non-pressure point end face of the inner ring 2. When the bearing is running, it will not be affected by the oil inlet hole 2-2. A plurality of guide surface lubrication grooves 4-1 are evenly arranged along the circumferential direction on the outer surface of the retainer 4, which can guide the oil and gas to lubricate the steel ball 3. These two improvements significantly improve the lubrication effect.

[0013] Compared with the prior art, the utility model has the following beneficial effects:

[0014] The utility model overcomes the shortcomings of the prior art, and adopts a method in which a semicircular groove channel with a cross-section is processed in the middle of the outer surface of the inner ring, and an annular oil inlet groove is processed along the circumferential direction on one end face of the inner ring, and the inner surface of the semicircular groove channel on the outer surface of the inner ring is evenly processed with three oil inlet holes along the circumferential direction, and the interior of the semicircular groove channel on the inner ring is connected with the interior of the annular oil inlet groove through the oil inlet hole; and the position of the annular oil inlet groove and the oil inlet hole is changed from the outer diameter of the outer ring to the non-pressure point end face of the inner ring, so that oil and gas can directly enter the semicircular groove channel of the inner ring when entering the interior of the bearing, preventing the bearing from throwing oil and gas to the outside of the bearing when running at high speed, improving the lubrication effect of the bearing, reducing the friction between the retaining frame and the steel ball when the bearing rotates at high speed, thereby avoiding the phenomenon of bearing temperature rising and serious wear; after adopting the external guide method, it is convenient for oil and gas to enter the guide surface and the semicircular groove channel, and the balance of the retaining frame can be guaranteed during high-speed operation, thereby ensuring the stability of the bearing operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a main sectional view of a high-efficiency lubricating angular contact ball bearing described in the utility model;

[0016] Figure 2 It is a main cross-sectional view of the inner ring of a high-efficiency lubricating angular contact ball bearing described in the utility model;

[0017] Figure 3 It is a three-dimensional structural schematic diagram of a cage in a high-efficiency lubricating angular contact ball bearing described in the utility model. DETAILED DESCRIPTION

[0018] Specific implementation method 1: Combination Figures 1 to 3 The present embodiment is described. The present embodiment is a highly efficient lubricating angular contact ball bearing, and its specific structure includes an outer ring 1, an inner ring 2, a steel ball 3 and a cage 4;

[0019] A semicircular groove channel with a cross section is processed in the middle of the outer surface of the inner ring 2, and an annular oil inlet groove 2-1 is processed along the circumferential direction on one end face of the inner ring 2, and n oil inlet holes 2-2 are uniformly processed on the inner surface of the semicircular groove channel on the outer surface of the inner ring 2 along the circumferential direction, where n is a positive integer, and the interior of the semicircular groove channel on the inner ring 2 is connected to the interior of the annular oil inlet groove 2-1 through the oil inlet hole 2-2, an outer ring 1 is sleeved on the outer surface of the inner ring 2, a retainer 4 is provided between the inner surface of the outer ring 1 and the outer surface of the inner ring 2, and a steel ball 3 is provided inside each pocket of the retainer 4;

[0020] In this specific embodiment, the lubrication of the angular contact ball bearing plays a key role when the electric spindle is running at high speed. The improvement of the lubrication method and the improvement of the lubrication effect can increase the service life of the bearing; the annular oil inlet groove 2-1 is designed on the end face of the inner ring 2, which can facilitate the oil and gas to directly enter the semicircular groove channel on the outer surface of the inner ring 2 when entering the bearing. The annular oil inlet groove 2-1 is set on the non-pressure point end face of the inner ring 2, and the bearing will not be affected by the oil inlet hole 2-2 when it is running. A plurality of guide surface lubrication grooves 4-1 are evenly arranged on the outer surface of the retainer 4 along the circumferential direction, which can guide the oil and gas to lubricate the steel ball 3. These two improvements significantly improve the lubrication effect.

[0021] Specific implementation method 2: Combination Figures 1 to 3 This embodiment is described. This embodiment is a further limitation of the bearing described in the first embodiment. In this embodiment, a high-efficiency lubricating angular contact ball bearing is described. A plurality of guide surface lubrication grooves 4-1 are evenly arranged on the outer surface of the retainer 4 along the circumferential direction.

[0022] In this specific embodiment, a plurality of guide surface lubrication grooves 4-1 are evenly arranged on the outer surface of the retaining frame 4 in the circumferential direction. The externally guided retaining frame can improve the lubrication effect at high speeds. The lubrication grooves designed on the guide surface can further guide the oil and gas to enter between the steel balls and the retaining frame, thereby improving the lubrication effect.

[0023] Specific implementation method three: Combination Figures 1 to 3 This embodiment is described as a further limitation of the bearing described in the second embodiment. In the high-efficiency lubricated angular contact ball bearing described in this embodiment, the guide surface lubrication groove 4-1 on the outer surface of the retaining frame 4 is arranged corresponding to the pocket.

[0024] Specific implementation method four: Combination Figures 1 to 3This embodiment is described. This embodiment is a further limitation of the bearing described in the first embodiment. In this embodiment, a high-efficiency lubricating angular contact ball bearing is described. A gap is provided between the outer diameter of the retaining frame 4 and the large rib close to the outer ring 1. The gap is 0.2 mm.

[0025] In this specific implementation, a gap is provided between the outer diameter of the retaining frame 4 and the large rib close to the outer ring 1, and the gap is 0.2mm. The outer ring of the bearing is in a stationary state, and the retaining frame is biased toward the outer ring, with a gap of 0.2mm between the outer ring rib and the inner ring rib. In the external guiding state, the inner ring will not squeeze out the lubricating oil in the raceway when rotating, and the bearing retaining frame may collide with the outer ring of the bearing to correct the position of the retaining frame. It is suitable for use under high-speed and stable load conditions.

[0026] Specific implementation method five: Combination Figures 1 to 3 This embodiment is described. This embodiment is a further limitation on the bearing described in the specific embodiment 1. In the high-efficiency lubricating angular contact ball bearing described in this embodiment, the number n of the oil inlet holes 2-2 is 3≤n≤10.

[0027] Specific implementation method six: Combination Figures 1 to 3 This embodiment is described as a further limitation of the bearing described in the first embodiment. In this embodiment, a high-efficiency lubricated angular contact ball bearing is described, and the annular oil inlet groove 2 - 1 is arranged on the non-pressure point end face of the inner ring 2 .

Claims

1. A highly efficient lubricated angular contact ball bearing, Features: It includes an outer ring (1), an inner ring (2), steel balls (3) and a retaining frame (4); A semicircular groove channel with a cross section is machined on the middle of the outer surface of the inner ring (2), and an annular oil inlet groove (2-1) is machined on one end face of the inner ring (2) along the circumferential direction. The inner surface of the semicircular groove channel on the outer surface of the inner ring (2) is uniformly machined with n oil inlet holes (2-2) along the circumferential direction, where n is a positive integer, and the interior of the semicircular groove channel on the inner ring (2) is connected to the interior of the annular oil inlet groove (2-1) through the oil inlet holes (2-2). An outer ring (1) is sleeved on the outer surface of the inner ring (2), and a retainer (4) is provided between the inner surface of the outer ring (1) and the outer surface of the inner ring (2), and a steel ball (3) is provided inside each pocket of the retainer (4).

2. A highly efficient lubricating angular contact ball bearing according to claim 1, Features: A plurality of guide surface lubrication grooves (4-1) are evenly arranged along the circumferential direction on the outer surface of the retaining frame (4).

3. A highly lubricated angular contact ball bearing according to claim 2, Features: The guide surface lubrication groove (4-1) on the outer surface of the retaining frame (4) is arranged corresponding to the pocket hole.

4. The highly lubricated angular contact ball bearing according to claim 1, Features: A gap is provided between the outer diameter of the retaining frame (4) and the large rib close to the outer ring (1), and the gap is 0.2 mm.

5. The highly lubricated angular contact ball bearing according to claim 1, Features: The number n of the oil inlet holes (2-2) is 3≤n≤10.

6. The highly lubricated angular contact ball bearing according to claim 1, Features: The annular oil inlet groove (2-1) is arranged on the non-pressure point end surface of the inner ring (2).

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