Engineering plastic mold injection high-speed angular contact ball bearing retainer and lubricating method thereof

Abstract

The invention relates to an engineering plastic mold injection high-speed angular contact ball bearing retainer and a lubricating method thereof, and relates to the technical field of high-speed angular contact bearings, the engineering plastic mold injection high-speed angular contact ball bearing retainer comprises a bearing outer ring, a bearing inner ring and a bearing supporting frame, the bearing supporting frame is connected between the bearing outer ring and the bearing inner ring, and the bearing supporting frame is in a hollow circular truncated cone shape; the bearing supporting frame comprises an outer check ring, an outer oil injection ring and an inner connecting groove, the inner connecting groove is formed between the outer check ring and the outer oil injection ring, the connecting position of the outer check ring and the inner connecting groove and the connecting position of the outer oil injection ring and the inner connecting groove are each in an arc shape bent inwards, and multiple sets of ball connecting grooves are formed in the inner connecting groove. The two ends of the ball connecting groove are connected into the outer check ring and the outer oil injection ring respectively, and a ball is connected into the ball connecting groove. Lubricating work can be rapidly completed during oil injection, rapid circulation of lubricating oil can be guaranteed during oil injection, and it can be guaranteed that the lubricating oil is not prone to being thrown out in the using process.

Description

Technical Field

[0001] The present application relates to the technical field of high-speed angular contact bearings, and in particular to an engineering plastic injection-molded high-speed angular contact ball bearing retainer and a lubrication method thereof. Background Art

[0002] Angular contact ball bearings have raceways on both the inner and outer rings, and the inner and outer rings can move relative to each other along the bearing axis. This type of bearing is particularly suitable for bearing combined loads, that is, loads acting simultaneously in the radial and axial directions, and bearing lubrication is crucial for the use of the bearing.

[0003] After searching, the existing patent, publication number CN202132373U, discloses an angular contact ball bearing, including a bearing outer ring, balls, and a bearing inner ring. The balls are arranged between the bearing outer ring and the bearing inner ring, and annular raceways are provided on the bearing outer ring and the bearing inner ring. The angle a formed by the line connecting the contact points of the balls with the bearing outer ring and the bearing inner ring and the radial direction is 15° to 40°. The structure is simple, can withstand radial loads and axial loads simultaneously, and can operate at higher speeds. The larger the contact angle, the higher the axial load capacity. In the process of realizing this application, the inventors found that the existing technology has the following problems: Existing angular contact ball bearings are not easy to lubricate. During the lubrication process, the bearing support frame and the various connected grooves and cavities are often not completely lubricated, which causes the bearing to be subjected to greater resistance during use, increasing the load and loss of use. In addition, during use, the lubricating oil in the bearing is easily thrown out, which not only pollutes the use environment of the bearing, but also increases the consumption of lubricating oil. In addition, the rapid consumption of lubricating oil will cause the bearing to wear, which in turn affects the use accuracy of the bearing. Therefore, in order to solve the above-mentioned related technical problems, an engineering plastic injection molded high-speed angular contact ball bearing cage and a lubrication method thereof are proposed. Summary of the Invention

[0004] In order to improve the above problems, the present application provides an engineering plastic injection-molded high-speed angular contact ball bearing cage and a lubrication method thereof.

[0005] This application provides an engineering plastic injection molded high-speed angular contact ball bearing cage and a lubrication method thereof, which adopts the following technical solutions: An engineering plastic injection-molded high-speed angular contact ball bearing cage comprises a bearing outer ring, a bearing inner ring, and a bearing support frame. The bearing support frame is connected between the bearing outer ring and the bearing inner ring and is in the shape of a hollow truncated cone. The bearing support frame comprises an outer retaining ring, an outer oiling ring, and an inner connecting groove, and the inner connecting groove is provided between the outer retaining ring and the outer oiling ring. Among them, the connection points between the outer retaining ring and the outer oil filling ring and the inner connecting groove are all in the shape of an arc curved inward, and multiple groups of ball connecting grooves are arranged in the inner connecting groove, and the two ends of the ball connecting groove are respectively connected to the outer retaining ring and the outer oil filling ring, and balls are connected in the ball connecting groove.

[0006] Preferably, the outer ring of the bearing is annular, and the inner and outer edges of the outer ring of the bearing are chamfered. The outer ring of the bearing includes an outer connecting ring and an inner connecting ring, and the diameter of the inner connecting ring is smaller than the diameter of the outer connecting ring; an outer ring connecting groove is provided between the outer connecting ring and the inner connecting ring, and the connection between the outer connecting ring and the outer ring connecting groove is an arc-shaped that bends outward, and the interface angle between the inner connecting ring and the outer ring connecting groove is a right-angle rail.

[0007] By adopting the above technical solution, the chamfering of the inner and outer edges of the bearing outer ring facilitates the insertion of the oil filling equipment, or is less likely to damage the application equipment when applying grease, making it easier to carry out the oil filling work, and the connection structure between the outer connecting ring and the inner connecting ring and the outer ring connecting groove facilitates oil filling.

[0008] Preferably, the bearing inner ring includes an installation limit ring and an insert cylinder, and the diameter of the installation limit ring is larger than the diameter of the insert cylinder, the insert cylinder is provided with an installation connection groove, and two sets of oil grooves are provided in the installation connection groove.

[0009] By adopting the above technical solution, the oil groove can accelerate the flow speed of the lubricating oil in the installation connection groove, prevent the lubricating oil from flowing slowly in the installation connection groove due to the obstruction of the ball, thereby achieving the effect of rapid lubrication.

[0010] The diameter of the outer retaining ring is larger than the diameter of the outer oil filling ring, and one side of the outer retaining ring is fitted on the inner side of the installation limit ring and the inner connecting ring. The outer oil filling ring is connected between the outer connecting ring and the plug-in tube, and the two ends of the ball are respectively fitted with the installation connecting groove and the outer ring connecting groove, and the contact angles between the installation connecting groove, the outer ring connecting groove and the ball are centrally symmetrical to each other.

[0011] By adopting the above technical solution, the connection structure between the outer retaining ring, the installation limit ring and the inner connecting ring, as well as the outer retaining ring, the installation limit ring and the inner connecting ring can prevent the lubricating oil from being thrown out from both sides of the bearing when the bearing rotates.

[0012] Preferably, an oil passage groove is provided in the inner connecting groove, and the oil passage groove is connected with multiple groups of ball connecting grooves. Multiple groups of circulation holes are provided in the oil passage groove, and the circulation holes are provided between two adjacent groups of ball connecting grooves.

[0013] By adopting the above technical solution, the interface structure between the inner connecting groove, the outer retaining ring and the outer oil filling ring can make it easier for the lubricating oil to flow into the inner connecting groove and is not easily thrown out during rotation. The oil groove can more quickly introduce the lubricating oil into each ball connecting groove and allow the lubricating oil in the ball connecting groove to flow quickly into other ball connecting grooves.

[0014] Preferably, the circulation hole passes through the inner connecting groove, and the circulation hole is arranged on the radius of the bearing support frame, and the diameter of the end of the circulation hole close to the outer ring of the bearing is larger than the diameter of the end close to the inner ring of the bearing.

[0015] By adopting the above technical solution, the lubricating oil flowing into the mounting connection groove can increase the contact area between the ball and the lubricating oil, so that the lubricating oil can complete the lubrication work more quickly, and the structure of the flow hole with one end larger and the other end smaller makes it difficult for the lubricating oil entering the mounting connection groove to flow back to the bearing support frame during rotation.

[0016] Preferably, a plurality of oil filling grooves are provided on the outer side of the outer oil filling ring, and one end of the oil filling groove extends into the oil through groove, and the diameter of the oil through groove close to the outer oil filling ring is smaller than that close to the outer retaining ring.

[0017] By adopting the above technical solution, the oil filling groove is easier to extend into the bearing support frame when using a syringe for oiling, and can make the lubricating oil enter the bearing support frame more quickly when spraying or applying the lubricating oil. The structure of the oil groove with one end larger and the other end smaller makes it difficult for the lubricating oil entering the oil groove to be thrown out during rotation.

[0018] Preferably, a lubrication method for an engineering plastic injection molded high-speed angular contact ball bearing cage comprises the following steps: Step 1: First, lubricate the bearing by applying oil, dripping or spraying, etc., and lubricate the bearing to the side close to the outer oil filling ring. Apply or spray the lubricating oil to the side close to the outer oil filling ring, or inject or drip the oil above the side close to the outer oil filling ring. Step 2: After the lubricating oil is filled, the bearing is rotated manually or electrically. The lubricating oil enters the bearing support frame through the gap between the bearing support frame and the bearing outer ring and the bearing inner ring. Some of the lubricating oil directly contacts the balls, while some of the lubricating oil flows into the oil groove. Step 3: During the bearing rotation, the lubricating oil flows in the oil groove and flows into each ball connecting groove in sequence along the direction of the oil groove rotation. The oil then wraps around the outside of the ball in the ball connecting groove and evenly lubricates the ball during its rotation. The excess lubricating oil flows from the ball connecting groove to the inner ring of the bearing. Step 4: At the same time, during the flow of the lubricating oil in the oil groove, part of the lubricating oil will flow from the circulation hole to the inner ring of the bearing, and the lubricating oil flowing into the inner ring of the bearing enters the installation connecting groove, and circulates in the installation connecting groove and the oil groove in the installation connecting groove, and in the process of circulation, it is evenly wrapped around the outside of the rolling ball, thereby completing the lubrication of the bearing support frame and the ball.

[0019] 1. Compared with the existing technology, this engineering plastic molded high-speed angular contact ball bearing cage and its lubrication method can quickly complete the lubrication work during oil injection. The bearing is rotated manually or electrically, and the lubricating oil enters the bearing support frame through the gap between the bearing support frame and the bearing outer ring and the bearing inner ring. Part of the lubricating oil directly contacts the balls, while part of the lubricating oil flows into the oil groove. During the rotation of the bearing, the lubricating oil flows in the oil groove and flows into each ball connection groove in sequence along the direction of rotation of the oil groove, and then The ball connecting groove is wrapped around the outside of the ball and completes the uniform lubrication of the ball during the rotation of the ball. The excess lubricating oil flows from the ball connecting groove to the inner ring of the bearing. During the flow of the lubricating oil in the oil groove, part of the lubricating oil will flow from the flow hole to the inner ring of the bearing, and the lubricating oil flowing into the inner ring of the bearing enters the installation connecting groove and circulates in the installation connecting groove and the oil groove inside the installation connecting groove. During the circulation process, it is evenly wrapped around the outside of the rolling ball, thereby completing the lubrication of the bearing support frame and the ball.

[0020] 2. Compared with the prior art, this engineering plastic molded high-speed angular contact ball bearing retainer and its lubrication method can ensure that the lubricating oil is not easily thrown out during use. The connection structure between the outer retaining ring, the mounting limit ring and the inner connecting ring, as well as the outer retaining ring, the mounting limit ring and the inner connecting ring, can prevent the lubricating oil from being thrown out from both sides of the bearing when the bearing rotates. The lubricating oil flowing into the mounting connecting groove can increase the contact area between the ball and the lubricating oil, thereby enabling the lubricating oil to complete the lubrication work more quickly. The structure of the flow hole with one end larger than the other end makes it difficult for the lubricating oil entering the mounting connecting groove to flow back to the bearing support frame during rotation. The oil filling groove is convenient for easier insertion into the bearing support frame when using a syringe for oiling, and can enable the lubricating oil to enter the bearing support frame more quickly when spraying or applying the lubricating oil. The structure of the oil passage groove with one end larger than the other end makes it difficult for the lubricating oil entering the oil passage groove to be thrown out during rotation.

[0021] 3. Compared with the prior art, this engineering plastic molded high-speed angular contact ball bearing retainer and its lubrication method can ensure the rapid circulation of lubricating oil during oil filling. The oil groove can accelerate the flow speed of lubricating oil in the installation connection groove, and prevent the lubricating oil from flowing slowly in the installation connection groove due to obstruction of the balls, thereby achieving the effect of rapid lubrication. The oil groove can more quickly introduce the lubricating oil into each ball connection groove, and can enable the lubricating oil in the ball connection groove to quickly flow into other ball connection grooves. The oil filling groove is convenient for easier insertion into the bearing support frame when using a syringe for oil filling, and can enable the lubricating oil to enter the bearing support frame more quickly when spraying or applying the lubricating oil. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural diagram of the front side of the main body of this application; Figure 2 A schematic structural diagram of the back of the main body of this application; Figure 3 A schematic structural diagram of a side cross-section of the main body of this application; Figure 4 This is a schematic structural diagram of a side cross-section of the outer ring of the bearing of this application; Figure 5 This is a schematic structural diagram of the inner ring of the bearing of this application; Figure 6 This is a schematic structural diagram of the side section of the bearing support frame of the present application; Figure 7 This is a structural diagram of the bearing support frame of this application; Figure 8 This is a structural diagram of the oil groove of this application.

[0023] The accompanying drawings are marked as follows: 1. bearing outer ring; 11. outer connecting ring; 12. inner connecting ring; 13. outer ring connecting groove; 2. bearing inner ring; 21. installation limit ring; 22. plug-in cylinder; 221. installation connecting groove; 222. oil groove; 3. bearing support frame; 31. outer retaining ring; 32. outer oil filling ring; 321. oil filling groove; 33. inner connecting groove; 331. oil through groove; 332. circulation hole; 34. ball connecting groove; 4. ball. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0025] The following is combined with Figures 1-8 , further details of this application are given.

[0026] An engineering plastic injection molded high-speed angular contact ball bearing cage, comprising a bearing outer ring 1, a bearing inner ring 2 and a bearing support frame 3, Figure 1 and Figure 2 as well as Figure 3 The bearing support frame 3 is connected between the bearing outer ring 1 and the bearing inner ring 2, and the bearing support frame 3 is a hollow truncated cone. The bearing support frame 3 includes an outer retaining ring 31, an outer oil filling ring 32, and an inner connecting groove 33, and the inner connecting groove 33 is provided between the outer retaining ring 31 and the outer oil filling ring 32; Among them, the junctions between the outer retaining ring 31 and the outer oil filling ring 32 and the inner connecting groove 33 are all in the shape of an arc curved inward, and multiple sets of ball connecting grooves 34 are provided in the inner connecting groove 33, and the two ends of the ball connecting groove 34 are respectively connected to the outer retaining ring 31 and the outer oil filling ring 32, and the ball 4 is connected to the ball connecting groove 34; the bearing outer ring 1 and the bearing inner ring 2 and the bearing support frame 3 and the ball 4 are spliced together to form a complete high-speed angular contact ball bearing, and the ball 4 is installed in the ball connecting groove 34, and when the high-speed angular contact ball bearing retainer is oiled, oil is injected from one side of the outer oil filling ring 32.

[0027] Reference Figure 1 and Figure 4 The outer ring 1 of the bearing is annular, and the inner and outer edges of the outer ring 1 of the bearing are chamfered. The outer ring 1 of the bearing includes an outer connecting ring 11 and an inner connecting ring 12, and the diameter of the inner connecting ring 12 is smaller than the diameter of the outer connecting ring 11; an outer ring connecting groove 13 is provided between the outer connecting ring 11 and the inner connecting ring 12, and the connection between the outer connecting ring 11 and the outer ring connecting groove 13 is an arc-shaped connection that bends outward, and the interface angle between the inner connecting ring 12 and the outer ring connecting groove 13 is a right angle; oil is injected from the outer connecting ring 11 side of the bearing outer ring 1, and the arc structure between the outer connecting ring 11 and the outer ring connecting groove 13 and the right-angle interface between the inner connecting ring 12 and the outer ring connecting groove 13 make it difficult for the bearing to throw out the lubricating oil when in use, and the outer ring connecting groove 13 is used to connect the ball 4, and the ball 4 rolls in the outer ring connecting groove 13.

[0028] Reference Figure 3 and Figure 5The bearing inner ring 2 includes an installation limit ring 21 and an insert cylinder 22, and the diameter of the installation limit ring 21 is larger than the diameter of the insert cylinder 22. An installation connection groove 221 is provided in the insert cylinder 22, and two sets of oil grooves 222 are provided in the installation connection groove 221; the installation limit ring 21 of the bearing inner ring 2 is used to connect and fix the bearing support frame 3, and the insert cylinder 22 of the bearing inner ring 2 is inserted into the bearing support frame 3. During lubrication, the lubricating oil flows in the installation connection groove 221 and the oil groove 222. The installation connection groove 221 in the bearing inner ring 2 is used to connect the ball 4, and the ball 4 slides in the installation connection groove 221.

[0029] Reference Figure 3 and Figure 5 The diameter of the outer retaining ring 31 is larger than the diameter of the outer oil filling ring 32, and one side of the outer retaining ring 31 is attached to the inner side of the installation limit ring 21 and the inner connecting ring 12, the outer oil filling ring 32 is connected between the outer connecting ring 11 and the plug-in tube 22, and the two ends of the ball 4 are respectively attached to the installation connection groove 221 and the outer ring connecting groove 13, and the contact angles between the installation connection groove 221 and the outer ring connecting groove 13 and the ball 4 are centrally symmetrical to each other; the ball 4 rolls in the ball connecting groove 34, and its outer side is attached to the inner side of the inner connecting ring 12. The mounting connecting groove 221 and the outer ring connecting groove 13 are rotated together. When oiling, the lubricating oil enters from one side of the outer oil filling ring 32, and the structure of the interface between the outer oil filling ring 32 and the outer connecting ring 11 and the plug-in tube 22 is small on the outside and large on the inside. The connection structure between the outer retaining ring 31 and the mounting limit ring 21 and the inner connecting ring 12 can be regarded as the mounting limit ring 21 and the inner connecting ring 12 blocking the interface between the inner connecting ring 12 and the mounting connecting groove 221 and the outer ring connecting groove 13, which is in a relatively sealed state.

[0030] Reference Figure 6 and Figure 7 An oil groove 331 is provided in the inner connecting groove 33, and the oil groove 331 is connected to multiple groups of ball connecting grooves 34. Multiple groups of circulation holes 332 are provided in the oil groove 331, and the circulation holes 332 are provided between two adjacent groups of ball connecting grooves 34; the oil groove 331 is provided at the lowest point of the inner connecting groove 33, and is mainly used to communicate the two adjacent groups of ball connecting grooves 34, and the circulation holes 332 are used to introduce the lubricating oil in the oil groove 331 into the inner ring 2 of the bearing.

[0031] Reference Figure 6 and Figure 7 The circulation hole 332 passes through the inner connecting groove 33, and the circulation hole 332 is set on the radius of the bearing support frame 3. The diameter of the end of the circulation hole 332 close to the bearing outer ring 1 is larger than the diameter of the end close to the bearing inner ring 2; the circulation hole 332 introduces the lubricating oil in the oil groove 331 into the installation connecting groove 221 of the bearing inner ring 2.

[0032] Reference Figure 6 and Figure 8 A plurality of oil filling grooves 321 are provided on the outside of the outer oil filling ring 32, and one end of the oil filling groove 321 extends into the oil through groove 331. The diameter of the oil through groove 331 close to the outer oil filling ring 32 is smaller than that close to the outer retaining ring 31. During lubrication, the external lubricating oil enters the oil through groove 331 from the oil filling groove 321.

[0033] As a preferred embodiment, a lubrication method for an engineering plastic injection molded high-speed angular contact ball bearing cage comprises the following steps: Step 1: First, the bearing can be lubricated by applying oil, dripping or spraying. The oil is injected into the side of the bearing close to the outer oil filling ring 32. The lubricating oil can be applied or sprayed on the side of the bearing close to the outer oil filling ring 32, or injected or dripped above the side of the bearing close to the outer oil filling ring 32. Step 2: After the lubricating oil is filled, the bearing can be rotated manually or electrically. The lubricating oil enters the bearing support frame 3 through the gaps between the bearing outer ring 1 and the bearing inner ring 2. Some of the lubricating oil directly contacts the balls 4, while some of the lubricating oil flows into the oil groove 331. Step 3: During the rotation of the bearing, the lubricating oil flows in the oil groove 331 and flows into each ball connecting groove 34 in the direction of rotation of the oil groove 331. The oil is then wrapped around the outer side of the ball 4 in the ball connecting groove 34. During the rotation of the ball 4, the ball 4 is evenly lubricated. The excess lubricating oil flows from the ball connecting groove 34 to the inner ring 2 of the bearing. Step 4: At the same time, during the flow of the lubricating oil in the oil groove 331, part of the lubricating oil will flow from the circulation hole 332 to the inner ring 2 of the bearing, and the lubricating oil flowing into the inner ring 2 of the bearing enters the mounting connection groove 221, and circulates in the mounting connection groove 221 and the oil groove 222 in the mounting connection groove 221, and in the process of circulation, it is evenly wrapped around the outside of the rolling ball 4, thereby completing the lubrication of the bearing support frame 3 and the ball 4.

[0034] The working process of the present application is as follows: first, the bearing is lubricated by applying oil, dripping or spraying, and the oil is injected into the side of the bearing close to the outer oil filling ring 32. The lubricating oil can be applied or sprayed on the side of the bearing close to the outer oil filling ring 32, or injected or dripped above the side of the bearing close to the outer oil filling ring 32. After the lubricating oil is injected, the bearing can be rotated manually or electrically. The lubricating oil enters the bearing support frame 3 through the gap between the bearing support frame 3 and the bearing outer ring 1 and the bearing inner ring 2. Part of the lubricating oil directly contacts the ball 4, while part of the lubricating oil flows into the oil groove 331. During the rotation of the bearing, the lubricating oil flows in the oil groove 331 and flows into each ball connecting groove 34 in the direction of rotation of the oil groove 331. The oil is then wrapped around the outer side of the ball 4 in the ball connecting groove 34. During the rotation of the ball 4, the ball 4 is evenly lubricated. The excess lubricating oil flows from the ball connecting groove 34 to the inner ring 2 of the bearing. At the same time, during the flow of the lubricating oil in the oil groove 331, part of the lubricating oil will flow from the circulation hole 332 to the inner ring 2 of the bearing, and the lubricating oil flowing into the inner ring 2 of the bearing enters the mounting connecting groove 221, and circulates in the mounting connecting groove 221 and the oil groove 222 in the mounting connecting groove 221, and during the circulation process, it is evenly wrapped around the outside of the rolling ball 4, thereby completing the lubrication of the bearing support frame 3 and the ball 4, and during the rotation process, the arc structure between the outer connecting ring 11 and the outer ring connecting groove 13 and the right-angle interface between the inner connecting ring 12 and the outer ring connecting groove 13 make it difficult for the bearing to throw out the lubricating oil when in use. The above is the working principle of this engineering plastic injection-molded high-speed angular contact ball bearing retainer and its lubrication method.

[0035] The examples of this specific embodiment are all preferred embodiments of this application and are not intended to limit the scope of protection of this application. Identical components are represented by the same reference numerals. Therefore, any equivalent changes made based on the structure, shape, and principle of this application should be included in the scope of protection of this application.

Claims

1. An engineering plastic injection molded high-speed angular contact ball bearing cage, comprising a bearing outer ring (1), a bearing inner ring (2) and a bearing support frame (3), characterized in that: The bearing support frame (3) is connected between the bearing outer ring (1) and the bearing inner ring (2), and the bearing support frame (3) is in the shape of a hollow truncated cone. The bearing support frame (3) includes an outer retaining ring (31), an outer oil filling ring (32), and an inner connecting groove (33), and the inner connecting groove (33) is provided between the outer retaining ring (31) and the outer oil filling ring (32); The connection points between the outer retaining ring (31) and the outer oil filling ring (32) and the inner connecting groove (33) are all in an inwardly curved arc shape, and a plurality of groups of ball connecting grooves (34) are provided in the inner connecting groove (33), and the two ends of the ball connecting grooves (34) are respectively connected to the outer retaining ring (31) and the outer oil filling ring (32), and the balls (4) are connected in the ball connecting grooves (34).

2. The engineering plastic injection molded high-speed angular contact ball bearing cage according to claim 1, characterized in that: The bearing outer ring (1) is annular, and the inner and outer edges of the bearing outer ring (1) are chamfered. The bearing outer ring (1) includes an outer connecting ring (11) and an inner connecting ring (12), and the diameter of the inner connecting ring (12) is smaller than the diameter of the outer connecting ring (11).

3. The engineering plastic injection molded high-speed angular contact ball bearing cage according to claim 2, characterized in that: An outer ring connecting groove (13) is provided between the outer connecting ring (11) and the inner connecting ring (12), and the connection between the outer ring connecting groove (13) and the outer ring connecting groove (13) is in an arc shape that bends outwards, and the interface angle between the inner connecting ring (12) and the outer ring connecting groove (13) is a right angle.

4. The engineering plastic injection molded high-speed angular contact ball bearing cage according to claim 3, characterized in that: The bearing inner ring (2) comprises a mounting limit ring (21) and a plug-in cylinder (22), wherein the diameter of the mounting limit ring (21) is larger than the diameter of the plug-in cylinder (22), a mounting connection groove (221) is provided in the plug-in cylinder (22), and two groups of oil grooves (222) are provided in the mounting connection groove (221).

5. The engineering plastic injection molded high-speed angular contact ball bearing cage according to claim 4, characterized in that: The diameter of the outer retaining ring (31) is larger than the diameter of the outer oil filling ring (32), and one side of the outer retaining ring (31) is fitted on the inner sides of the mounting limit ring (21) and the inner connecting ring (12), the outer oil filling ring (32) is connected between the outer connecting ring (11) and the plug-in tube (22), and the two ends of the ball (4) are fitted on the mounting connecting groove (221) and the outer ring connecting groove (13), respectively, and the contact angles between the mounting connecting groove (221), the outer ring connecting groove (13) and the ball (4) are centrally symmetrical.

6. The engineering plastic injection molded high-speed angular contact ball bearing cage according to claim 1, characterized in that: An oil passage groove (331) is provided in the inner connecting groove (33), and the oil passage groove (331) is connected to multiple groups of ball connecting grooves (34). Multiple groups of circulation holes (332) are provided in the oil passage groove (331), and the circulation holes (332) are provided between two adjacent groups of ball connecting grooves (34).

7. The engineering plastic injection molded high-speed angular contact ball bearing cage according to claim 6, characterized in that: The circulation hole (332) passes through the inner connecting groove (33), and the circulation hole (332) is arranged on the radius of the bearing support frame (3), and the diameter of the end of the circulation hole (332) close to the bearing outer ring (1) is larger than the diameter of the end close to the bearing inner ring (2).

8. The engineering plastic injection molded high-speed angular contact ball bearing cage according to claim 6, characterized in that: A plurality of groups of oil filling grooves (321) are provided on the outside of the outer oil filling ring (32), and one end of the oil filling groove (321) extends into the oil through groove (331). The diameter of the oil through groove (331) at one end close to the outer oil filling ring (32) is smaller than that at one end close to the outer retaining ring (31).

9. A method for lubricating an engineering plastic injection molded high-speed angular contact ball bearing cage, using the engineering plastic injection molded high-speed angular contact ball bearing cage according to any one of claims 1 to 8, characterized in that: The lubrication method comprises the following steps: Step 1: First, lubricate the bearing by applying oil, dripping or spraying, and inject oil to the side of the bearing close to the outer oil injection ring (32), and apply or spray the lubricating oil to the side of the bearing close to the outer oil injection ring (32), or inject or drip oil above the side of the bearing close to the outer oil injection ring (32); Step 2: After the lubricating oil is filled, the bearing is rotated manually or electrically, and the lubricating oil enters the bearing support frame (3) through the gap between the bearing support frame (3) and the bearing outer ring (1) and the bearing inner ring (2). Part of the lubricating oil directly contacts the ball (4), while part of the lubricating oil flows into the oil groove (331); Step 3: During the rotation of the bearing, the lubricating oil flows in the oil groove (331) and flows into each ball connecting groove (34) in sequence along the direction of rotation of the oil groove (331), and is wrapped around the outer side of the ball (4) in the ball connecting groove (34). During the rotation of the ball (4), the ball (4) is evenly lubricated, and the excess lubricating oil flows from the ball connecting groove (34) to the inner ring (2) of the bearing; Step 4: At the same time, during the flow of the lubricating oil in the oil groove (331), part of the lubricating oil will flow from the circulation hole (332) to the inner ring of the bearing (2), and the lubricating oil flowing into the inner ring of the bearing (2) enters the mounting connection groove (221), and circulates in the mounting connection groove (221) and the oil groove (222) in the mounting connection groove (221), and in the process of circulation, it is evenly wrapped around the outside of the rolling ball (4), thereby completing the lubrication of the bearing support frame (3) and the ball (4).

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