Manufacturing apparatus for long-life ball bearings for spacecraft and bearings

Abstract

The application discloses a manufacturing device for long-life ball bearing of a spacecraft and the bearing and specifically relates to the field of bearing grinding processing. The manufacturing device comprises a machine body, three-jaw chucks and grinding assemblies are respectively arranged on the two sides of the machine body, a feeding driving assembly is arranged above the machine body, a feeding assembly is arranged on the output end of the feeding driving assembly, and the feeding driving assembly is used for driving the feeding assembly to move towards the three-jaw chucks. The feeding assembly comprises a feeding hopper with a vertical channel, the upper end of the vertical channel is provided with an upper channel, and the feeding hopper is used for conveying bearing outer rings. In the application, the outer ring is rotated, the outer key groove on the outer side of the outer ring is clamped by a positioning rod when the outer key groove is rotated to the lower side, the position of the outer key groove is determined during feeding, the position of the clamping claw on the three-jaw chuck can be directly adjusted, the clamping claw is not located directly below to avoid the outer key groove, the clamping claw of the three-jaw chuck is prevented from being clamped at the position of the outer key groove, the three-jaw chuck can be automatically centered, and the grinding precision is ensured.

Description

Technical Field

[0001] This invention relates to the field of bearing grinding technology, and more specifically, to manufacturing equipment and bearings for long-life ball bearings for spacecraft. Background Technology

[0002] Spacecraft rely on the propulsion force of their thrusters and system technology to perform complex space operations such as transportation, exploration, and transfer. Ball bearings, such as deep groove ball bearings and self-aligning ball bearings, are required in the power transmission of spacecraft propulsion systems. Spacecraft ball bearings have extremely stringent requirements for dimensional and geometric accuracy; therefore, grinding is necessary during the manufacturing process to ensure surface roughness and machining precision.

[0003] In the prior art, in order to improve the grinding efficiency, an automatic feeding mechanism is set up on the grinding equipment for the outer ring of the bearing. This mechanism mainly consists of a track and a cylinder. After the outer ring of the bearing rolls to the designated position in the track, the cylinder pushes the outer ring of the bearing onto the three-jaw chuck of the grinding equipment for clamping, and then the grinding process is performed.

[0004] For ball bearings used in spacecraft, which need to transmit large torques, keyways are created on the outer wall of the bearing's outer ring, resulting in a keyway bearing. Keyway bearings provide additional connection points for better transmission of rotational and axial forces. Simultaneously, the keyways ensure proper bearing positioning, preventing twisting or misalignment. In keyway bearings, the keyways are machined simultaneously with the outer ring machining. This is because internal stress is generated during machining, requiring heat treatment to relieve stress before grinding. Therefore, the keyways are already machined during grinding.

[0005] When grinding the raceway of the outer ring of a keyway bearing (the raceway is the channel through which the bearing balls roll on the inner and outer rings of the bearing), if the existing automatic feeding mechanism for the outer ring of the bearing is used, the position of the keyway cannot be determined. Consequently, it is impossible to intuitively avoid the keyway by adjusting the position of the jaws on the three-jaw chuck. When the cylinder pushes the outer ring of the bearing onto the three-jaw chuck, if one of the jaws of the three-jaw chuck clamps onto the keyway, the three-jaw chuck loses its automatic centering function, causing raceway eccentricity during the grinding of the bearing outer ring raceway. Summary of the Invention

[0006] The problem to be solved by the manufacturing equipment and bearing for long-life ball bearings for spacecraft provided by the present invention is that the position of the keyway cannot be determined during the automatic feeding of the bearing outer ring grinding. It is not possible to intuitively avoid the keyway by adjusting the position of the jaws on the three-jaw chuck. If one of the jaws of the three-jaw chuck is clamped in the position of the keyway, it will cause the three-jaw chuck to fail to automatically center itself.

[0007] To achieve the above objectives, the first aspect of the present invention provides the following technical solution: Manufacturing equipment for long-life ball bearings for spacecraft, comprising a body, with a three-jaw chuck and a grinding assembly respectively mounted on both sides of the body, and a feeding drive assembly mounted on the top of the body. A feeding assembly is mounted at the output end of the feeding drive assembly, and the feeding drive assembly is used to drive the feeding assembly to move towards the three-jaw chuck; the feeding assembly includes a feeding hopper, which has a vertical channel, with an upper channel at the upper end of the vertical channel. The feeding hopper is used to transport the outer ring, and through grooves are provided on both the left and right sides of the vertical channel. Positioning components are installed at the positions of the two through slots. A guide cylinder is fixedly installed at the bottom of the front side of the feeding hopper. A positioning rod extending to the inside of the vertical channel is fixedly connected to the bottom of the inner side of the guide cylinder. A pushing component is installed at the rear side of the feeding hopper. The positioning component is used to drive the outermost outer ring in the vertical channel to rotate. When the outer keyway on the outer side of the outer ring rotates to face downward, the outer ring moves downward so that the positioning rod enters the outer keyway. The pushing component is used to push the outer ring with the positioning rod in the outer keyway from the vertical channel and the guide cylinder to the three-jaw chuck so that the three-jaw chuck clamps the outer ring.

[0008] Preferably, the positioning component includes a second rotary drive component, the output end of which is fixedly mounted with a drive wheel. The drive wheel extends into the interior of the vertical channel from the through groove, and the outer wall of the drive wheel can contact the outer wall of the lowest outer ring of the vertical channel, thereby driving the outer ring to rotate. The axis of the drive wheel is located above the axis of the lowest outer ring inside the vertical channel.

[0009] Preferably, the feeding assembly further includes a push-pull component, which includes guide rods fixedly installed on both sides of the feeding hopper, a second linear drive component fixedly installed on the feeding hopper, and a connecting plate fixedly installed on the output end of the second linear drive component. The second rotary drive component is slidably installed on the guide rods, and a connecting rod is provided between the second rotary drive component and the connecting plate. The two ends of the connecting rod are respectively hinged to the connecting plate and the second rotary drive component.

[0010] Preferably, the pushing component includes a mounting frame, which is fixedly connected to the feeding hopper. A pushing rod is slidably mounted on the mounting frame, a pushing plate is mounted at the front end of the pushing rod, and a pin is mounted at the front end of the pushing plate. A linear drive component is mounted on the feeding hopper, and the two ends of the linear drive component are respectively hinged to the rear end of the pushing rod and the feeding hopper. When the pushing plate pushes the outer ring, the pushing plate contacts the end face of the outer ring, and the pin contacts the inner wall of the outer ring.

[0011] Preferably, the front end of the positioning rod extends to the front position of the guide cylinder.

[0012] Preferably, a leveling component is provided on one side of the three-jaw chuck. The leveling component includes a moving part six, and a leveling rod is installed at the output end of the moving part six. The three-jaw chuck has a rotatable chuck and jaws. The leveling rod and the jaws are located in the same horizontal direction, and the position of the leveling rod is higher than the lowest position when the jaws rotate to the bottom and lower than the highest position when the jaws rotate to a non-bottom position. The leveling rod can move away from or towards the jaws under the drive of the moving part six. When it approaches the jaws, it can push the jaws to rotate to a non-bottom position.

[0013] Preferably, the moving part six includes a bracket, a belt drive component is mounted on the upper side of the bracket, a rotary drive component three is also mounted on the bracket, the rotary drive component three is used to drive the belt drive component to drive, a slide plate is slidably mounted on the upper end of the bracket, the slide plate is fixedly connected to one side of the belt on the belt drive component, and a leveling rod is fixedly mounted on the slide plate.

[0014] Preferably, the grinding assembly includes a three-axis moving mechanism consisting of a first moving part, a second moving part, and a third moving part. A first rotary drive part is installed at the output end of the three-axis moving mechanism, and a grinding wheel is installed at the output end of the first rotary drive part.

[0015] Preferably, the feeding drive assembly includes a two-axis moving mechanism consisting of a moving part four and a moving part five, which is used to drive the feeding assembly to move laterally and vertically.

[0016] A second aspect of the present invention also provides a bearing, including an outer ring, an inner ring, rolling elements, and a cage. The outer ring is manufactured by the aforementioned manufacturing equipment for long-life ball bearings for spacecraft. The rolling elements are disposed between the outer ring and the inner ring. The cage has multiple retaining areas, which separate the multiple rolling elements. An external keyway is provided on the outer side of the outer ring, and an internal keyway is provided on the inner side of the inner ring. An oil reservoir is provided on the sidewall of the retaining area.

[0017] The technical effects of this invention are as follows: The manufacturing equipment for long-life ball bearings for spacecraft of this invention rotates the outer ring. When the outer keyway on the outer side of the outer ring rotates to the bottom, the positioning rod clamps the outer keyway, thus determining the position of the outer keyway during loading. At this time, the position of the jaws on the three-jaw chuck can be directly adjusted so that the jaws are not directly below to avoid the outer keyway. This ensures that the jaws of the three-jaw chuck will not be clamped in the position of the outer keyway, ensuring that the three-jaw chuck can automatically center itself, ensuring the grinding accuracy, and thus ensuring the strict precision of the ball bearings for spacecraft. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0019] Figure 2 This is a schematic diagram of the feeding assembly of the present invention. Figure 1 .

[0020] Figure 3 This is a schematic diagram of the feeding assembly of the present invention. Figure 2 .

[0021] Figure 4 This is a partial structural diagram of the feeding assembly of the present invention. Figure 1 .

[0022] Figure 5 This is a partial structural diagram of the feeding assembly of the present invention. Figure 2 .

[0023] Figure 6 This is a partial structural diagram of the present invention.

[0024] Figure 7 This is a schematic diagram of the structure of the three-jaw chuck and the leveling assembly of the present invention.

[0025] Figure 8 This is a schematic diagram of the locator pusher of the locator in this invention.

[0026] Figure 9 This is a schematic diagram of the bearing of the present invention.

[0027] Figure 10 This is a half-sectional view of the bearing of the present invention.

[0028] Explanation of reference numerals in the attached drawings: 1. Machine body; 2. Three-jaw chuck; 21. Jaw; 22. Chuck; 3. Grinding assembly; 31. Moving part one; 32. Moving part two; 33. Moving part three; 34. Rotary drive part one; 35. Grinding wheel; 4. Feeding drive assembly; 41. Moving part four; 42. Moving part five; 5. Feeding assembly; 51. Feeding hopper; 511. Vertical channel; 512. Upper channel; 513. Through slot; 52. Positioning component; 521. Rotary drive part two; 522. Drive wheel; 53. Guide cylinder; 54. Positioning rod; 55. Pushing component; 551. Mounting frame 552. Push rod; 553. Push plate; 554. Pin; 555. Linear drive component one; 56. Push-pull component; 561. Guide rod; 562. Linear drive component two; 563. Connecting plate; 564. Connecting rod; 6. Alignment assembly; 61. Moving component six; 611. Bracket; 612. Belt drive component; 613. Rotary drive component three; 614. Slide plate; 62. Alignment rod; 100. Bearing; 101. Outer ring; 1011. External keyway; 102. Inner ring; 1021. Internal keyway; 103. Rolling element; 104. Cage; 1041. Oil reservoir. Detailed Implementation

[0029] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] Please refer to the following: Figure 1-10 This invention provides a preferred manufacturing equipment for long-life ball bearings for spacecraft, comprising a body 1, with a three-jaw chuck 2 and a grinding assembly 3 mounted on its two sides respectively. A loading drive assembly 4 is mounted on top of the body, and a loading assembly 5 is mounted on the output end of the loading drive assembly. The loading drive assembly is used to drive the loading assembly to move towards the three-jaw chuck. The loading assembly includes a loading hopper 51, which has a vertical channel 511 and an upper channel 512 at the upper end of the vertical channel. The loading hopper is used to transport outer rings 101. Multiple outer rings are arranged sequentially from top to bottom in the vertical channel, meaning that the vertical channel can only accommodate one outer ring in the horizontal direction. The two sides of the vertical channel... Each side has a through groove 513, and a positioning component 52 is provided at the position of each through groove. A guide cylinder 53 is fixedly installed at the bottom of the front side of the feeding hopper. A positioning rod 54 extending to the inside of the vertical channel 511 is fixedly connected to the bottom of the inner side of the guide cylinder. A pushing component 55 is provided at the rear side of the feeding hopper. The positioning component is used to drive the outermost outer ring in the vertical channel to rotate. When the outer keyway 1011 on the outer side of the outer ring rotates to face downward, the outer ring moves downward so that the positioning rod 54 enters the outer keyway 1011. The pushing component is used to push the outer ring with the positioning rod in the outer keyway from the vertical channel and the guide cylinder to the three-jaw chuck in sequence, so that the three-jaw chuck clamps the outer ring.

[0031] In the above technical solution, the outer ring 101 is the outer ring of the bearing 100. The three-jaw chuck is mounted on the main spindle of the machine body and is driven by a motor and gearbox. The grinding assembly includes a three-axis moving mechanism composed of moving part one 31, moving part two 32, and moving part three 33. A rotary drive part one 34 is installed at the output end of the three-axis moving mechanism, and a grinding wheel 35 is installed at the output end of the rotary drive part one.

[0032] It should be noted that the moving parts 1 (31), 2 (32), and 3 (33) can all be linear motors, lead screw and nut devices, etc. The rotary drive part 1 uses a motor and adjusts the position of the grinding wheel through a three-axis moving mechanism. The rotary drive part 1 drives the grinding wheel to rotate to process the raceway of the outer ring.

[0033] In the above technical solution, the feeding drive assembly includes a two-axis moving mechanism composed of moving part 41 and moving part 5. The two-axis moving mechanism is used to drive the feeding assembly to move laterally and vertically.

[0034] It should be noted that both moving parts four and five can be linear motors or lead screw and nut devices, etc. During feeding, the feeding drive component drives the feeding component to move forward of the three-jaw chuck, and then moves back to its original position after feeding is completed.

[0035] In the above technical solution, the positioning component 52 includes a second rotary drive component 521. A drive wheel 522 is fixedly installed at the output end of the second rotary drive component 521. The drive wheel extends from the through groove 513 into the interior of the vertical channel 511. The outer wall of the drive wheel can contact the outer wall of the lowest outer ring 101 of the vertical channel, thereby driving the outer ring to rotate. The axis of the drive wheel is located above the axis of the lowest outer ring inside the vertical channel.

[0036] It should be noted that the rotary drive component 521 uses a geared motor. The rotary drive component 521 drives the drive wheel to rotate. When the drive wheel contacts the outer wall of the outer ring, it can drive the outer ring to rotate. The purpose of setting the axis of the drive wheel above the axis of the lowermost outer ring is to enable the drive wheel to apply a downward force to the outer ring. Thus, when the outer keyway on the outer ring rotates to the lower position, the positioning rod 54 can quickly enter the outer keyway, that is, the outer keyway is inserted into the positioning rod.

[0037] In the above technical solution, the pushing component 55 can be in the form of a cylinder, that is, the cylinder pushes the outermost ring of the bottom of the vertical channel out of the guide cylinder 53.

[0038] In this embodiment, the specific implementation method is as follows: when grinding the raceway of the outer ring 101, the outer ring 101 is inserted into the upper channel 512. The upper channel 512 is inclined. The outer ring 101 slides from the upper channel 512 into the interior of the vertically arranged vertical channel 511. When it slides in, the position of the outer keyway 1011 cannot be determined. Therefore, the drive wheel 522 is driven to rotate by the rotation drive component 521. The drive wheel 522 drives the outer ring 101 to rotate through friction. When the outer keyway 1011 rotates to the bottom, the outer ring 101 moves downward due to gravity. As a result, the positioning rod 54 enters the interior of the outer keyway 1011 relative to the outer ring 101. That is, the outer keyway 1011 is inserted into the positioning rod 54. At this time, the outer ring 101 is limited by the positioning rod 54 and can no longer rotate. The position of the outer keyway 1011 is determined. Then, the outer ring 101 is pushed out from the guide cylinder 53 to the position of the three-jaw chuck 2 by the pushing component 55. It can be clamped by the three-jaw chuck. It is only necessary to adjust the position of the jaw 21 on the three-jaw chuck so that it is not directly below to avoid the outer keyway 1011. After the outer ring 101 is accurately clamped, it is ground by the grinding component.

[0039] The above technical solution involves rotating the outer ring 101. When the outer keyway 1011 rotates to the bottom, the positioning rod 54 is used to hold the outer keyway in place, thus determining the position of the outer keyway during loading. At this time, the position of the jaws 21 on the three-jaw chuck can be adjusted intuitively so that the jaws are not directly below the outer keyway, thereby avoiding the outer keyway. This ensures that the jaws of the three-jaw chuck will not be clamped in the position of the outer keyway, ensuring that the three-jaw chuck can automatically center itself.

[0040] Please refer to this in particular Figure 2-5 To prevent the drive wheel 522 from affecting the descent of the outer ring, the drive wheel should move to the sides to avoid it when the outer ring is falling. When it is necessary to rotate the outer ring, the drive wheel should move closer to the outer ring. The above actions are achieved by the push-pull component 56. Specifically, the feeding assembly 5 also includes the push-pull component 56, which includes guide rods 561 fixedly installed on both sides of the feeding hopper 51, a second linear drive component 562 fixedly installed on the feeding hopper 51, and a connecting plate 563 fixedly installed at the output end of the second linear drive component 562. The second rotary drive component 521 is slidably installed on the guide rods 561. A connecting rod 564 is provided between the second rotary drive component 521 and the connecting plate 563. The two ends of the connecting rod 564 are hinged to the connecting plate 563 and the second rotary drive component 521, respectively.

[0041] It should be noted that the linear drive component 2562 uses a cylinder, such as... Figure 2 and Figure 5 As shown, when the linear drive component 562 drives the connecting plate 563 downward, the connecting plate 563, through two connecting rods 564, drives the two rotary drive components 521 and the drive wheel 522 on both sides to move away from each other. When the linear drive component 562 drives the connecting plate 563 upward, the two connecting rods 564 drive the two rotary drive components 521 and the drive wheel 522 to move closer together. The cross-section of the guide rod 561 can be set to an elliptical shape, so that the rotary drive component 521 will not rotate when it is slidably mounted on the guide rod 561.

[0042] Please see Figure 2-5 A pusher component 55 is provided, which includes a mounting frame 551, which is fixedly connected to the feeding hopper 51. A pusher rod 552 is slidably mounted on the mounting frame. A pusher plate 553 is mounted at the front end of the pusher rod. A pin 554 is mounted at the front end of the pusher plate. A linear drive component 555 is mounted on the feeding hopper 51. The two ends of the linear drive component 555 are respectively hinged to the rear end of the pusher rod and the feeding hopper 51. When the pusher plate pushes the outer ring 101, it contacts the end face of the outer ring. The pin contacts the inner wall of the outer ring.

[0043] It should be noted that the push rod 552 is arranged horizontally, and the linear drive component 555 is a cylinder. The extension and retraction of the linear drive component 555 can drive the push rod to move. The push rod drives the push plate 553 to push the outer ring 101 to the position of the three-jaw chuck, where it is clamped. To prevent the outer ring from tilting, a pin 554 is provided. Figure 5 As shown, there are two pins. When pushing the material, they contact and limit the movement with the inner wall of the outer ring 101. When not pushing the material, they move to the rear position of the vertical channel 511.

[0044] Furthermore, when the outer ring 101 is pushed out of the guide cylinder 53 to the position of the three-jaw chuck 2, the outer ring 101 will be tilted because it has moved out of the guide cylinder 53. When the tilt is large, the three-jaw chuck cannot clamp properly. Therefore, the rear end of the positioning rod 54 extends to the inside of the vertical channel 511, and the front end of the positioning rod 54 extends to the front position of the guide cylinder 53.

[0045] It should be noted that the rear end of the positioning rod 54 extends to the inner side of the vertical channel 511, the purpose of which is to ensure that the outer ring 101 can contact the positioning rod 54 when it falls from the vertical channel 511. The front end of the positioning rod extends to the front position of the guide cylinder, the purpose of which is to ensure that the positioning rod 54 can continue to support the outer ring 101 after it is moved out of the guide cylinder 53, and the two pins 554 can also continue to limit the outer ring 101. The position of the positioning rod 54 is not the position where the three-jaw chuck 2 clamps, so even if the outer ring 101 is moved out of the positioning rod 54, it can be ensured that the outer ring will not be tilted, and the pusher plate can directly push the outer ring into the three-jaw chuck for clamping.

[0046] Please refer to the following: Figure 1 , Figure 6-8 After the outer ring 101 is pushed out from the positioning rod 54, the outer keyway 1011 is located directly below. After the three-jaw chuck stops, the position of its jaws is uncertain. The operator does not need to look at the position of the outer keyway to know how to adjust the position of the jaws so that the jaws are not directly below and will not clamp the position of the outer keyway. However, this is still a semi-automatic operation. Therefore, in order to ensure that the jaws will not clamp the outer keyway without manual operation and to achieve fully automatic feeding operation, this embodiment also sets up a leveling component structure. Specifically, a leveling component 6 is provided on one side of the three-jaw chuck 2. The leveling component 6 includes a moving part 61. A leveling rod 62 is installed at the output end of the moving part 6. The three-jaw chuck has a rotatable chuck and jaws. The leveling rod and the jaws are located in the same horizontal direction. The position of the leveling rod is higher than the lowest position when the jaws rotate to the bottom and lower than the highest position when the jaws rotate to a non-bottom position. The leveling rod can move away from or closer to the jaws under the drive of the moving part 6. When it is close to the jaws, it pushes the jaws to rotate to a non-bottom position.

[0047] It should be noted that the lowest position when the chuck 21 rotates to directly downwards refers to, as Figure 8 The position shown in the left-hand diagram, where the chuck 21 is rotated to its highest position (not directly below), refers to... Figure 8 The location shown in the diagram on the right. Figure 8 The left-hand diagram shows one of the jaws 21 at the bottom. At this point, the position of this jaw needs to be adjusted. The moving component six moves the aligning rod downwards towards the jaw, which in turn pushes the jaw, causing the chuck to rotate. Specifically... Figure 8 As shown in the right-hand diagram, the chucks are positioned so that they are not directly below the outer ring. This prevents the chucks from clamping the outer keyway when holding the outer ring. It should be noted that regardless of the chucks' position, the adjusting rod is moved back and forth once each time material is loaded, ensuring that no chuck is directly below the outer ring.

[0048] Furthermore, the moving component six includes a bracket 611, a belt drive component 612 is mounted on the upper side of the bracket, and a rotary drive component three 613 is also mounted on the bracket. The rotary drive component three is used to drive the belt drive component to drive. A slide plate 614 is slidably mounted on the upper end of the bracket. The slide plate is fixedly connected to one side of the belt on the belt drive component, and a leveling rod 62 is fixedly mounted on the slide plate.

[0049] It should be noted that the rotary drive component 3 (613) uses a motor, and the belt drive component consists of a belt and pulleys. The motor drives the belt drive component, which in turn moves the slide plate on the support, thereby moving the leveling rod. Alternatively, the moving component 6 can also use a linear motor, cylinder, lead screw, or other mechanisms.

[0050] Please refer to this in particular Figure 9-10 In this embodiment, a bearing is also provided, including an outer ring 101 made by the aforementioned spacecraft long-life ball bearing manufacturing equipment, an inner ring 102, rolling elements 103, and a cage 104. An outer keyway 1011 is provided on the outer side of the outer ring 101, and an inner keyway 1021 is provided on the inner side of the inner ring 102. The rolling elements 103 are disposed between the outer ring 101 and the inner ring 102. The cage 104 has multiple retaining areas, and the cage 104 separates the multiple rolling elements 103 through the retaining areas. An oil reservoir 1041 is provided on the side wall of the retaining area.

[0051] It should be noted that the external keyway 1011 and the internal keyway 1021 make the bearing installation more stable. The oil reservoir 1041 allows the surface of the rolling element 103 to be replenished with oil when it rolls. Since the oil reservoir 1041 has a certain oil storage capacity, it can ensure that the oil film on the rolling element is not damaged.

[0052] In conclusion, the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A manufacturing equipment for long-life ball bearings for spacecraft, comprising a body (1), wherein a three-jaw chuck (2) and a grinding assembly (3) are respectively installed on both sides of the body (1), a feeding drive assembly (4) is installed on the top of the body (1), and a feeding assembly (5) is installed at the output end of the feeding drive assembly (4), wherein the feeding drive assembly (4) is used to drive the feeding assembly (5) to move toward the three-jaw chuck (2); The feeding assembly (5) includes a feeding hopper (51), characterized in that: The feeding hopper (51) has a vertical channel (511), and the upper end of the vertical channel (511) has an upper channel (512). The feeding hopper (51) is used to convey the outer ring (101). The left and right sides of the vertical channel (511) have through grooves (513). Positioning components (52) are provided at the positions of the two through grooves (513). A guide cylinder (53) is fixedly installed at the bottom of the front side of the feeding hopper (51). A positioning rod (54) extending to the inside of the vertical channel (511) is fixedly connected to the bottom of the inner side of the guide cylinder (53). A pushing component (55) is provided at the rear side of the feeding hopper (51). The positioning component (52) is used to drive the lowest outer ring (101) in the vertical channel (511) to rotate. When the outer keyway (1011) on the outer side of the outer ring (101) rotates to face downward, the outer ring (101) moves downward so that the positioning rod (54) enters the outer keyway (1011). The pushing component (55) is used to push the outer ring (101) into the outer keyway (1011) through the positioning rod (54) to the three-jaw chuck (2) in sequence from the vertical channel (511) and the guide cylinder (53), so that the three-jaw chuck (2) clamps the outer ring (101).

2. The manufacturing equipment for long-life ball bearings for spacecraft according to claim 1, characterized in that: The positioning component (52) includes a second rotary drive component (521), and a drive wheel (522) is fixedly installed at the output end of the second rotary drive component (521). The drive wheel (522) extends into the interior of the vertical channel (511) from the through groove (513). The outer wall of the drive wheel (522) can contact the outer wall of the lowest outer ring (101) of the vertical channel (511), thereby driving the outer ring (101) to rotate. The axis of the drive wheel (522) is located above the axis of the lowest outer ring (101) inside the vertical channel (511).

3. The manufacturing equipment for long-life ball bearings for spacecraft according to claim 2, characterized in that: The feeding assembly (5) further includes a push-pull component (56), which includes a guide rod (561) fixedly installed on both sides of the feeding hopper (51), a linear drive component two (562) fixedly installed on the feeding hopper (51), and a connecting plate (563) fixedly installed at the output end of the linear drive component two (562). The rotary drive component two (521) is slidably installed on the guide rod (561). A connecting rod (564) is provided between the rotary drive component two (521) and the connecting plate (563). The two ends of the connecting rod (564) are respectively hinged to the connecting plate (563) and the rotary drive component two (521).

4. The manufacturing equipment for long-life ball bearings for spacecraft according to claim 1, characterized in that: The pushing component (55) includes a mounting frame (551), which is fixedly connected to the feeding hopper (51). A pushing rod (552) is slidably mounted on the mounting frame (551). A pushing plate (553) is mounted on the front end of the pushing rod (552). A pin (554) is mounted on the front end of the pushing plate (553). A linear drive component (555) is mounted on the feeding hopper (51). The two ends of the linear drive component (555) are respectively hinged to the rear end of the pushing rod (552) and the feeding hopper (51). When the pushing plate (553) pushes the outer ring (101), the pushing plate (553) contacts the end face of the outer ring (101), and the pin (554) contacts the inner wall of the outer ring (101).

5. The manufacturing equipment for long-life ball bearings for spacecraft according to claim 4, characterized in that: The front end of the positioning rod (54) extends to the front position of the guide cylinder (53).

6. The manufacturing equipment for long-life ball bearings for spacecraft according to claim 1, characterized in that: A leveling component (6) is provided on one side of the three-jaw chuck (2). The leveling component (6) includes a moving part six (61). A leveling rod (62) is installed at the output end of the moving part six (61). The three-jaw chuck (2) has a rotatable chuck (22) and a jaw (21). The leveling rod (62) and the jaw (21) are located in the same horizontal direction. The position of the leveling rod (62) is higher than the lowest position when the jaw (21) rotates to the bottom and lower than the highest position when the jaw (21) rotates to a non-bottom position. The leveling rod (62) moves away from or closer to the jaw (21) under the drive of the moving part six (61). When it moves closer to the jaw (21), it pushes the jaw (21) to rotate to a non-bottom position.

7. The manufacturing equipment for long-life ball bearings for spacecraft according to claim 6, characterized in that: The moving component six (61) includes a bracket (611), on the upper side of the bracket (611) is a belt drive component (612), and a rotary drive component three (613) is also installed on the bracket (611). The rotary drive component three (613) is used to drive the belt drive component (612) to drive. A slide plate (614) is slidably installed on the upper end of the bracket (611). The slide plate (614) is fixedly connected to one side of the belt on the belt drive component (612). The aligning rod (62) is fixedly installed on the slide plate (614).

8. The manufacturing equipment for long-life ball bearings for spacecraft according to claim 1, characterized in that: The grinding assembly (3) includes a three-axis moving mechanism consisting of a moving part one (31), a moving part two (32), and a moving part three (33). A rotary drive part one (34) is installed at the output end of the three-axis moving mechanism, and a grinding wheel (35) is installed at the output end of the rotary drive part one (34).

9. The manufacturing equipment for long-life ball bearings for spacecraft according to claim 1, characterized in that: The feeding drive assembly (4) includes a two-axis moving mechanism consisting of a moving part four (41) and a moving part five (42), which is used to drive the feeding assembly (5) to move laterally and vertically.

10. A bearing comprising an outer ring (101), an inner ring (102), rolling elements (103), and a cage (104), characterized in that: The outer ring (101) is manufactured by the equipment for manufacturing long-life ball bearings for spacecraft as described in any one of claims 1-9. The rolling elements (103) are disposed between the outer ring (101) and the inner ring (102). The cage (104) has a plurality of retaining areas. The cage (104) separates the plurality of rolling elements (103) through the retaining areas. An external keyway (1011) is provided on the outer side of the outer ring (101), and an internal keyway (1021) is provided on the inner side of the inner ring (102). An oil reservoir (1041) is provided on the side wall of the retaining area.

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