A bearing

Abstract

The present invention relates to a bearing comprising an outer ring, an inner ring, a cylindrical body, and a retaining cage. An oil hole for replenishing lubricating oil is provided in the oil groove of the inner ring. To facilitate the lubricating oil's full entry into the oil hole, a large inclination angle is formed on the inner ring, allowing the lubricating oil to flow smoothly into the oil hole and provide sufficient lubrication for the bearing. A groove can be provided on the outer ring according to usage requirements, serving as a connection when two bearings are used in parallel to prevent slippage. The outer and inner rings are made of special materials and undergo heat treatment. The cylindrical body is optimized in terms of material, shape, and convexity. The retaining cage is specially designed in terms of material, structure, and molding method. This bearing has high load-bearing capacity, can be used at ultra-high speeds, is resistant to high temperatures, has sufficient lubrication, is stable in use, and has a long service life.

Description

Technical Field

[0001] The present invention relates to a bearing component, and more particularly to a bearing. Background Art

[0002] With the rapid development of the machinery industry, the demand for bearings, a connecting component that plays a role in rotation and support, is increasing. In some special applications, the requirements for high speed and high load-bearing performance of bearings are becoming increasingly stringent. For example, some special axle main reducer upper bearings have low speeds and relatively large loads. Conventional axle main reducer upper bearings have low speeds and relatively large loads. Two tapered roller bearings are used. In special applications, the bearings in this position have relatively high speeds and large loads. While tapered roller bearings can meet the load-bearing performance requirements, they cannot meet the speed requirements and cannot meet the application requirements.

[0003] Therefore, in the prior art, there is a patent with patent number 201820397393, entitled Cylindrical Roller Bearing and Bearing Ring with Oil Inlet Hole, which discloses a method of effectively replenishing the lubricating oil of the roller by opening an oil inlet hole in the inner ring of the bearing, so that the lubricating oil can enter the raceway well to lubricate the friction surface. However, the bearing structure of the above structure still needs to rotate the roller during operation. Therefore, during high-speed operation, the roller will have an extremely high speed. In this way, during high-speed operation, it is easy for the roller to rotate too fast, resulting in the lubricating oil on the contact surface between the roller and the inner and outer rings being thrown out due to centrifugal force. Therefore, the existing bearing structure has the problem of poor lubrication when used at high speed. Summary of the Invention

[0004] In view of the shortcomings of the prior art, the object of the present invention is to provide a bearing that has sufficient lubrication effect when used at high speed.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solution: a bearing, comprising an inner ring, a cylinder, a retaining frame and an outer ring, the outer ring being coaxially sleeved on the inner ring, the cylinder being embedded in the retaining frame and arranged between the inner ring and the outer ring, an oil groove being provided on the outer wall of the inner ring, the cylinder being arranged in the oil groove, an oil hole being provided on the inner wall of the inner ring, one end of the oil hole extending to the bottom of the oil groove, the lower side surface of the cylinder being adapted to the shape of the bottom of the oil groove, and being arranged to fit together with the bottom of the oil groove.

[0006] As a further improvement of the present invention, convex corners are provided at both left and right ends of the lower side of the cylinder, and the end of the convex corner facing away from the cylinder is a round head structure, which is inserted into the oil hole.

[0007] As a further improvement of the present invention, the upper side surface of the cylinder is an arc surface structure, and a number of oil outlet holes arranged side by side are opened on the side wall of the arc surface of the upper side surface of the cylinder. The upper end of the oil outlet hole is in contact with the outer ring, and the lower end extends into the round head structure of the convex corner to be connected with the oil through hole.

[0008] As a further improvement of the present invention, an oil outlet groove is provided at the upper end of the oil outlet hole, and the oil outlet groove is in the shape of an inverted suction cup. The small-area end of the suction cup is connected to the oil outlet hole, and the outer wall of the large-area end is against the outer ring. Several oil guide grooves are provided on the groove wall of the oil outlet groove, and the two ends of the oil guide groove extend to the two ends of the oil outlet groove respectively.

[0009] As a further improvement of the present invention, an oil storage ring groove is opened on the edge of the upper end of the oil outlet groove. The cross-section of the oil storage ring groove is an inclined U-shape. One end of the U-shape extends to the edge of the oil outlet groove, and the other end is against the outer ring.

[0010] As a further improvement of the present invention, a splicing groove is provided on the end surface of the outer ring.

[0011] As a further improvement of the present invention, the inner ring and the outer ring are made of stainless steel and are formed by forging.

[0012] As a further improvement of the present invention, during the production process of the outer ring, after the rough grinding slide and before the fine grinding slide, the chamfer of the outer ring is hard turned or ground, and after hard turning and rough grinding, it is polished, and then the splicing groove on the outer ring is polished.

[0013] As a further improvement of the present invention, during the production process of the inner ring, after the rough grinding of the groove and before the fine grinding of the groove, the chamfer and the oil groove of the inner ring are hard turned or ground, and then polished after hard turning and rough grinding.

[0014] As a further improvement of the present invention, the retaining frame is made of alloy steel material and is formed into a forging. The structure adopts an internal guide structure. During the production process of the retaining frame, the blank is turned after forging, and then the surface is polished and then coated.

[0015] The beneficial effect of the present invention is that a bearing structure can be effectively formed by the combination of the inner ring, the cylinder, the retaining frame and the outer ring, and the lubricating oil can smoothly flow into the oil hole through the setting of the oil groove and the oil hole to fully lubricate the bearing. At the same time, a structure is adopted in which the lower side of the cylinder is adapted to the shape of the bottom of the oil groove, so that the cylinder will not rotate during high-speed operation, thus avoiding the problem of the lubricating oil being thrown away due to centrifugal force. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1Schematic diagram of the internal structure of the bearing of the present invention;

[0017] Figure 2 for Figure 1 Enlarged view of part A in the middle. DETAILED DESCRIPTION

[0018] The present invention will be further described below in conjunction with the embodiments given in the accompanying drawings. The up, down, left, and right directions in this embodiment are all based on the directions shown in the drawings in this specification. The drawings in this specification show a cross-sectional view of the bearing when the bearing is placed vertically. Therefore, when the bearing is placed flat or in other states, the corresponding directions will also change accordingly.

[0019] Reference Figures 1 to 2 As shown, a bearing of this embodiment includes an inner ring 1, a cylinder 2, a retainer 3 and an outer ring 4. The outer ring 4 is coaxially sleeved on the inner ring 1, and the cylinder 2 is embedded in the retainer 3 and arranged between the inner ring 1 and the outer ring 4. An oil groove 6 is opened on the outer wall of the inner ring 1, and the cylinder 2 is arranged in the oil groove 6. An oil hole 5 is opened on the inner wall of the inner ring 1, and one end of the oil hole 5 extends to the bottom of the oil groove 6. The lower side of the cylinder 2 is adapted to the shape of the bottom of the oil groove 6 and is aligned with the bottom of the oil groove 6. The mutually fitting arrangement is achieved by adapting the lower side surface of the cylinder 2 to the shape of the bottom of the oil groove 6. This ensures that during high-speed operation of the bearing, the cylinder 2 will not rotate with the outer ring 4. This effectively avoids the problem that the lubricating oil cannot adhere well to the cylinder 2 due to centrifugal force caused by the high-speed rotation of the cylinder 2. Moreover, the upper side surface of the cylinder 2 in this embodiment adopts an arc surface, so that the contact between the side surface and the outer ring 4 is point contact, which can effectively reduce the friction between the two.

[0020] As a specific embodiment of the improvement, convex corners 61 are provided at both left and right ends of the lower side of the cylinder 2. The end of the convex corner 61 facing away from the cylinder 2 is a round head structure, which is inserted into the oil hole 5. Through the setting of the above structure, on the one hand, the stability of the cylinder 2 during high-speed operation can be increased, and on the other hand, the oil intake of the lubricating oil can be effectively controlled, thereby reducing the number of times the lubricating oil is added.

[0021] As a specific embodiment of the improvement, the upper side surface of the cylinder 2 is an arc surface structure, and a number of oil outlet holes 21 arranged side by side are opened on the side wall of the arc surface of the upper side surface of the cylinder 2. The upper end of the oil outlet hole 21 is in contact with the outer ring 4, and the lower end extends into the round head structure of the convex corner 61 to be connected with the oil through hole 5. Through the setting of the above structure, during high-speed operation, a certain negative pressure will be formed in the oil outlet hole 21, so that the lubricating oil can be effectively extracted from the oil through hole 5, and then enter between the cylinder 2 and the outer ring 4 to form an oil film, thereby increasing the wear resistance of the bearing.

[0022] As an improved specific embodiment, an oil outlet groove 211 is provided at the upper end of the oil outlet hole 21, and the oil outlet groove 211 is in the shape of an inverted suction cup. The small-area end of the suction cup is connected to the oil outlet hole 21, and the outer wall of the large-area end is against the outer ring 4. A plurality of oil guide grooves 212 are provided on the groove wall of the oil outlet groove 211, and the two ends of the oil guide groove 212 extend to the two ends of the oil outlet groove 211 respectively. By adopting the above-mentioned inverted suction cup structure, the oil outlet groove 211 can be set to better generate negative pressure. At the same time, after the lubricating oil reaches the oil outlet groove 211, a large-area oil film can be quickly formed, which ensures the stability of the bearing operation while greatly reducing the wear between the cylinder 2 and the outer ring 4.

[0023] As a specific embodiment of the improvement, an oil storage ring groove 213 is provided on the edge of the upper end of the oil outlet groove 211. The cross-section of the oil storage ring groove 213 is an inclined U-shape. One end of the U-shape extends to the edge of the oil outlet groove 211, and the other end is against the outer ring 4. Through the setting of the oil storage ring groove 213, a part of the lubricating oil can be stored, so that the oil film can be formed more quickly and effectively during the next operation.

[0024] As an improved specific implementation, a splicing groove 41 is opened on the end face of the outer ring 4. The splicing groove 41 can be used as a connection when two bearings are used in parallel to prevent them from slipping.

[0025] As a specific implementation of the improvement, the inner ring 1 and the outer ring 4 are made of stainless steel and are formed by forging. At the same time, high-temperature tempering and high processing precision are adopted to meet the high-speed performance requirements. In this way, sufficient hardness can be achieved between the inner ring 1 and the outer ring 4, so that a high-speed bearing structure can be better formed.

[0026] As a specific implementation of the improvement, in order to further improve the performance: during the production process of the outer ring 4, after the rough grinding slide and before the fine grinding slide, the chamfer of the outer ring 4 is hard turned or ground to remove the oxide scale, and the chamfer is symmetrical and uniform, and after hard turning and rough grinding, it is polished, and then the splicing groove 41 on the outer ring 4 is polished.

[0027] As a specific implementation method of the improvement, in order to further improve the performance: during the production process of the inner ring 1, after the rough grinding of the groove and before the fine grinding of the groove, the chamfer and the oil groove 6 of the inner ring 1 are hard turned or ground to remove the oxide scale, and the chamfer is symmetrical and uniform, and is polished after hard turning and rough grinding.

[0028] As a specific implementation of the improvement, the retainer 3 is made of alloy steel material and is formed into a forging. An internal guide structure is adopted in the structure. The internal guide of the retainer 3 improves the high-speed performance of the bearing, and the material and the forming method improve the strength of the retainer itself. During the production process of the retainer 3, after the forging blank is turned, it is subjected to surface finishing treatment and then coating treatment, thereby improving the overall performance of the retainer 3.

[0029] In summary, the bearing of this embodiment adopts a method of matching the lower side of the cylinder 2 with the bottom of the oil groove 6, which can effectively avoid the problem in the prior art that the lubricating oil is separated from the cylinder 2 due to centrifugal force during high-speed operation.

[0030] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiment. All technical solutions based on the concept of the present invention are within the scope of protection of the present invention. It should be noted that for those skilled in the art, various improvements and modifications that do not depart from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A bearing comprising an inner ring (1), a cylinder (2), a retaining frame (3) and an outer ring (4), wherein the outer ring (4) is coaxially sleeved on the inner ring (1), and the cylinder (2) is embedded in the retaining frame (3) and arranged between the inner ring (1) and the outer ring (4), characterized in that: An oil groove (6) is provided on the outer wall of the inner ring (1), and the cylinder (2) is arranged in the oil groove (6). An oil hole (5) is provided on the inner wall of the inner ring (1), and one end of the oil hole (5) extends to the bottom of the oil groove (6). The side of the cylinder (2) facing the inner ring (1) is adapted to the shape of the bottom of the oil groove (6) and is arranged to fit the bottom of the oil groove (6). Both left and right ends of the cylinder (2) facing the inner ring (1) are provided with convex corners (61), and the end of the convex corner (61) facing away from the cylinder (2) is a round head structure, which is inserted into the oil hole (5).

2. The bearing according to claim 1, characterized in that: The side of the cylinder (2) facing the outer ring (4) is an arc surface structure, and a plurality of oil outlet holes (21) arranged side by side are provided on the side wall of the cylinder (2) facing the outer ring (4). The end of the oil outlet hole (21) facing the outer ring (4) contacts the outer ring (4), and the end facing the inner ring (1) extends into the round head structure of the convex corner (61) to communicate with the oil through hole (5).

3. The bearing according to claim 2, characterized in that: An oil outlet groove (211) is provided at one end of the oil outlet hole (21) facing the outer ring (4). The oil outlet groove (211) is in the shape of an inverted suction cup. The small-area end of the suction cup is connected to the oil outlet hole (21), and the outer wall of the large-area end abuts against the outer ring (4). A plurality of oil guide grooves (212) are provided on the groove wall of the oil outlet groove (211), and the two ends of the oil guide groove (212) extend to the two ends of the oil outlet groove (211).

4. The bearing according to claim 3, characterized in that: An oil storage ring groove (213) is provided on the edge of the oil outlet groove (211) toward one end of the outer ring (4). The cross section of the oil storage ring groove (213) is arranged in an inclined U-shape. The U-shape extends from one end toward the inner ring (1) to the edge of the oil outlet groove (211) and abuts against the outer ring (4) toward one end toward the outer ring (4).

5. The bearing according to claim 4, characterized in that: A splicing groove (41) is provided on the end surface of the outer ring (4).

6. The bearing according to claim 5, characterized in that: The inner ring (1) and the outer ring (4) are made of stainless steel and are formed by forging.

7. The bearing according to claim 6, characterized in that: During the production of the outer ring (4), after the rough grinding of the slideway and before the fine grinding of the slideway, the chamfer of the outer ring (4) is hard turned or ground, and after the hard turning and rough grinding, a finishing treatment is performed, and then the splicing groove (41) on the outer ring (4) is polished.

8. The bearing according to claim 7, characterized in that: During the production of the inner ring (1), after the rough grinding of the groove and before the fine grinding of the groove, the chamfer and the oil groove (6) of the inner ring (1) are hard turned or ground, and then polished after the hard turning and rough grinding.

9. The bearing according to claim 8, characterized in that: The retainer (3) is made of alloy steel and is formed into a forged piece. An inner guide structure is adopted in the structure. During the production process of the retainer (3), the blank is forged and then turned, and then the surface is polished and then plated.

Images