Automatic directional feeding and riveting device for ball bearing assembly

Abstract

The invention discloses an automatic directional feeding and riveting device for ball bearing assembly, and belongs to the technical field of bearing assembly, the automatic directional feeding and riveting device is provided with a rotary assembly table, and a lower retainer feeding mechanism, an upper retainer feeding mechanism, a riveting mechanism and a discharging mechanism which are sequentially distributed in the vertical direction of a cross shape, all stations in the whole process are synchronously carried out, and circulation is carried out. The design aims of unification of a transmission system, concentration of assembly space and efficient production are achieved, a lower retainer and upper retainer pre-assembly mode is adopted, a lower retainer is firstly lowered in place and rotated to a retainer pre-assembly station, and then a sleeve assembly after ball separation is conveyed to the retainer pre-assembly station through a pushing structure. The upper retainer is pre-assembled to the upper end face of the fitting assembly, and then the lower retainer which is in place in advance is pre-assembled to the lower end face of the fitting assembly, so that the upper retainer and the lower retainer are pre-assembled at the same station, and the displacement risk caused by single-side unrestraint of balls in the step-by-step assembling and moving process is effectively avoided.

Description

Technical Field

[0001] This invention relates to the field of bearing assembly and feeding technology, and more specifically, to an automatic directional feeding and riveting device for ball bearing assembly. Background Technology

[0002] Deep groove ball bearings typically consist of an outer ring, an inner ring, a cage, and balls. When assembling a deep groove ball bearing with a wave-shaped studded cage, the balls are first inserted between the inner and outer ring grooves. A ball separator is then used to evenly distribute the balls within the grooves, forming a bearing assembly. Next, a feeding device places the upper and lower half-cages into the corresponding positions within the assembly, and finally, the connecting rivets on the cages are riveted together to form a single structure containing the balls, completing the bearing assembly and riveting process.

[0003] During the assembly process described above, the two half-cages need to be positioned, loaded, and riveted. This involves connecting a half-cage with rivets and another half-cage with rivet holes using a riveting device to deform the rivets and form a single unit. This isolates a group of balls from the bearing assembly within the cage pockets. The loading and riveting of the cages relative to the bearing assembly typically involves stacking the upper and lower cages on the guide rods of two adjacent cage conveying devices. These two conveying mechanisms then sequentially place the upper and lower cages into positions corresponding to the balls on the upper and lower parts of the assembly. Finally, the bearing assembly with the pre-installed upper and lower cages is conveyed to the riveting mechanism. The pressure from the riveting mechanism causes plastic deformation of the rivets, forming the riveted connection between the upper and lower cages, thus completing the crucial step of assembling and riveting the deep groove ball bearing.

[0004] Currently, while this type of cage feeding and riveting mechanism is suitable for large-scale specialized production, it also suffers from problems such as complex mechanism, numerous tooling, long assembly path, large space occupation, and high equipment cost.

[0005] Furthermore, during the step-by-step assembly and movement of the upper and lower cages, the balls are prone to displacement due to the lack of constraint on one side (especially small-diameter balls). Therefore, we propose an automatic directional feeding and riveting device for ball bearing assembly to address the practical production problem. This device uses a rotary multi-station directional feeding method to solve the applicability issue of the bearing riveting device. Summary of the Invention

[0006] The purpose of this invention is to solve existing practical production problems and to provide an automatic directional feeding and riveting device for ball bearing assembly compared with existing technologies.

[0007] The objective of this invention can be achieved through the following technical solution: An automatic directional feeding and riveting device for ball bearing assembly includes a work frame, a rotary assembly table is rotatably mounted on one side of the upper end of the work frame, and a pushing structure for conveying the assembly components is mounted on one side of the rotary assembly table. The rotary assembly table is provided with a lower retainer feeding mechanism, an upper retainer feeding mechanism, a riveting mechanism and a feeding mechanism arranged sequentially in the circumferential direction. The lower retainer feeding mechanism and the upper retainer feeding mechanism have the same structure and are used for directional feeding of the lower retainer and the upper retainer, respectively. The upper retainer feeding mechanism is provided on the side corresponding to the pushing structure.

[0008] The rotary assembly table includes a hollow sleeve and a lower rotating disk and an upper rotating disk fixedly connected to the hollow sleeve in the vertical direction. The upper rotating disk has multiple assembly slots in the circumferential direction for supporting the sleeve components. The lower rotating disk has multiple top support components fixedly installed in the circumferential direction below the assembly slots. The lower retainer feeding mechanism includes a frame fixed to the work frame. Material columns for stacking and sleeved lower retainers are suspended on the frame. A retainer release structure located at the lower end of the material column and used to lower and position the lower retainer.

[0009] The pushing structure includes a slide table that is slidably mounted on the work frame and is vertically arranged with the upper retainer feeding mechanism. Support frames are fixedly installed on both the front and rear sides of the slide table along its moving direction. A lifting platform is installed on the lower rotary table through a pair of telescopic cylinders. Multiple assembly mold tables for supporting and limiting the assembly are fixed on the lifting platform.

[0010] Furthermore, the top support assembly includes a base fixedly installed on the lower rotating disk and located directly below the assembly slot, with both having the same center direction. A lower retainer mold platform is fixedly installed on the base via a telescopic rod, and a lower mold groove adapted to the structure of the lower retainer is provided on the upper surface of the lower retainer mold platform.

[0011] Furthermore, the retainer release structure includes a limiting plate fixedly installed at the lower end of the frame. The limiting plate has a lowering opening with an inner diameter larger than that of the lower retainer. Electric push rods are fixedly installed on the front and rear end walls of the limiting plate. The telescopic ends of the electric push rods are fixedly connected to a limiting template that slides on the lower end wall of the limiting plate and acts on the lower retainer.

[0012] Furthermore, a support space with a gap smaller than the outer diameter of the outer ring of the combined assembly but larger than the inner diameter of the outer ring of the combined assembly is reserved between the pair of support frames. The outer diameter of the combined mold table is smaller than the width of the support space. A combined mold groove adapted to the structure of the combined assembly is opened on the upper surface of the combined mold table. The outer diameter of the combined mold table is smaller than the outer diameter of the outer ring of the combined assembly but larger than the inner diameter of the outer ring of the combined assembly. This allows the combined assembly to be supported while being able to freely pass through the support space to perform lifting actions.

[0013] Furthermore, the riveting mechanism includes a U-shaped frame fixedly installed on the work frame. A pair of riveting cylinders are fixed at the top of the U-shaped frame. The telescopic ends of the riveting cylinders pass through the top of the U-shaped frame and are fixedly connected to a lifting platform. A riveting template with the same axial direction as the assembly groove is fixed at the bottom of the lifting platform. An upper mold groove adapted to the upper retainer structure is opened on the lower end face of the riveting template.

[0014] Furthermore, the unloading mechanism includes an unloading frame fixedly installed on the upper end of the work frame and extending one end to the inner side of the hollow sleeve. An electric push rod is fixedly installed on the inner end of the unloading frame, located on the inner side of the hollow sleeve and corresponding to the position of the assembly slot, with its telescopic end extending outward from the unloading frame. Each assembly slot has a push hole on its inner end wall corresponding to the position of the telescopic end of the electric push rod.

[0015] Furthermore, a slide table located on the outer edge of the assembly groove is fixed at the outer end of the unloading rack.

[0016] The present invention also proposes a method for using an automatic directional feeding and riveting device for ball bearing assembly, comprising the following steps:

[0017] S1. Preparation: The lower retainer and the upper retainer are pre-stacked on the lower retainer feeding mechanism and the upper retainer feeding mechanism, respectively.

[0018] S2. Pre-assembly work: First, lower the lower retainer into position, raise the lower retainer mold table upwards and bring it close to the lower retainer feeding mechanism retainer release structure, lower the lower retainer through the retainer release structure, and the lower retainer falls on the lower retainer mold table and returns to the initial position as the lower retainer feeding mechanism descends. Then, rotate the pre-assembled lower retainer with the rotary assembly table to the area below the upper retainer feeding mechanism.

[0019] Next, the assembly components are loaded. The assembly components after ball separation are laterally conveyed into the lower part of the upper retainer loading mechanism through the push structure (4). During this process, the assembly mold table is raised until the assembly components are close to the retainer release structure below the upper retainer loading mechanism.

[0020] Finally, the upper retainer is pre-installed. The upper retainer is directly lowered onto the assembly through the retainer release structure. After the upper retainer is on the assembly, it is supported on the assembly slot as the assembly mold table descends. The retraction push structure exposes the lower end of the assembly slot. At this time, the upper rotary table is raised until the lower retainer is limited to the lower part of the assembly. The lower retainer and upper retainer are pre-assembled on the upper and lower end faces of the assembly at the same station.

[0021] S3. Riveting operation: Rotate the pre-assembled assembly with the lower and upper retainers to the riveting mechanism, raise the upper rotating plate slightly upward to disengage the assembly from the assembly slot, and rivet the lower and upper retainers to the assembly by pressing down the riveting template.

[0022] S4. Unloading: The assembled bearing is rotated and conveyed to the unloading mechanism. The electric push rod is started, and the telescopic end of the electric push rod passes through the push hole to push the bearing out.

[0023] Compared with the prior art, the advantages of this invention are:

[0024] 1. This invention achieves the design goals of unified transmission system, centralized assembly space, simplified process, and high production efficiency by setting up a rotary assembly table and sequentially distributing the lower retainer loading mechanism, upper retainer loading mechanism, riveting mechanism, and unloading mechanism along the cross-shaped vertical direction. The entire process is carried out synchronously and repeatedly at each station.

[0025] 2. It is important to emphasize that a lower and upper cage pre-assembly mode is adopted. The lower cage is lowered and positioned using the lower cage mold table. The lower cage rotates with the rotary assembly table to the cage pre-assembly station. Then, the assembled assembly after ball separation is directionally conveyed to the cage pre-assembly station through the push structure. In this process, the upper cage is first pre-assembled from top to bottom onto the upper end face of the assembled assembly. Then, the push structure is retracted to pre-assemble the lower cage from bottom to top onto the lower end face of the assembled assembly. The upper and lower cages are pre-assembled synchronously at the same station, which effectively avoids the risk of displacement of the balls due to lack of constraint on one side during the step assembly movement. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0027] Figure 2 This is a schematic diagram of the structure at the junction of the rotary assembly table and the unloading mechanism of the present invention;

[0028] Figure 3 This is an exploded view of the rotary assembly table of the present invention;

[0029] Figure 4 This is a top view of the lower retainer loading mechanism of the present invention;

[0030] Figure 5 This is a bottom view of the lower retainer loading mechanism of the present invention;

[0031] Figure 6 This is a schematic diagram of the cage release structure of the present invention;

[0032] Figure 7 This is a schematic diagram of the upper cage feeding mechanism of the present invention;

[0033] Figure 8 This is a schematic diagram of the structure of the lower cage during the lowering and positioning of the present invention;

[0034] Figure 9 This is a schematic diagram of the pushing structure of the present invention;

[0035] Figure 10 This is a schematic diagram of the pushing structure of the present invention during operation. Figure 1 ;

[0036] Figure 11 This is a schematic diagram of the pushing structure of the present invention during operation. Figure 2 ;

[0037] Figure 12 This is a schematic diagram of the structure of the present invention during operation. Figure 1 ;

[0038] Figure 13 This is a schematic diagram of the structure of the present invention during operation. Figure 2 ;

[0039] Figure 14 This is a schematic diagram of the structure of the present invention during operation. Figure 3 .

[0040] Explanation of the labels in the diagram:

[0041] 1. Work frame; 2. Rotary assembly table; 21. Hollow sleeve; 22. Lower rotary disk; 23. Upper rotary disk; 231. Assembly slot; 232. Push-out hole; 24. Base; 25. Lower retainer mold table;

[0042] 3. Assembly components; 4. Pushing structure; 41. Support frame; 42. Slide table; 43. Telescopic cylinder; 44. Assembly mold table; 5. Lower retainer loading mechanism; 51. Frame; 52. Limiting plate; 53. Material column; 54. Electric push rod; 55. Limiting template; 6. Upper retainer loading mechanism; 7. Lower retainer; 8. Upper retainer;

[0043] 9. Riveting mechanism; 91. U-shaped frame; 92. Riveting cylinder; 93. Lifting platform; 94. Riveting template; 10. Unloading rack; 11. Electric push rod. Detailed Implementation

[0044] 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. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0045] Example 1: This invention discloses an automatic directional feeding and riveting device for ball bearing assembly. Please refer to [link / reference]. Figure 1The system includes a work frame 1, a rotary assembly table 2 rotatably mounted on one side of the upper end of the work frame 1, a push structure 4 for conveying the assembly 3 on one side of the rotary assembly table 2, and a lower retainer feeding mechanism 5, an upper retainer feeding mechanism 6, a riveting mechanism 9 and a feeding mechanism arranged sequentially in the circumferential direction of the rotary assembly table 2. The lower retainer feeding mechanism 5 and the upper retainer feeding mechanism 6 have the same structure and are used for directional feeding of the lower retainer 7 and the upper retainer 8 respectively. The upper retainer feeding mechanism 6 is set on one side of the push structure 4.

[0046] The positions of the lower retainer loading mechanism 5, the upper retainer loading mechanism 6, and the unloading mechanism correspond to the lower retainer 7 lowering station, the retainer pre-assembly station, the riveting station, and the unloading station, respectively. First, the lower retainer 7 is lowered and positioned.

[0047] After the lower retainer 7 rotates to below the upper retainer feeding mechanism 6, the ball-separating assembly 3 is conveyed to the upper retainer feeding mechanism 6 for feeding using the pushing structure 4. At the lowering station of the upper retainer 8, the lower retainer 8 is first pre-installed. At the same station, the lower retainer 7 is pre-installed by lifting it upward. The lower retainer 7 and the upper retainer 8 are pre-installed at the same station. The assembly 3 with the lower retainer 7 and the upper retainer 8 pre-installed is conveyed to the riveting mechanism 9 for riveting.

[0048] For details, please refer to Figure 2 , Figure 3 The rotary assembly table 2 includes a hollow sleeve 21 and a lower rotating disk 22 and an upper rotating disk 23 fixedly connected to the hollow sleeve 21 in the vertical direction. The upper rotating disk 23 has multiple assembly slots 231 in the circumferential direction for supporting the sleeve assembly 3. The lower rotating disk 22 has multiple support components located below the assembly slots 231 and used for pre-installing the support of the lower retainer 7 in the circumferential direction. These components include a base 24 fixedly installed on the lower rotating disk 22 and located below the assembly slots 231. The two components have the same circumferential direction. A lower retainer mold table 25 is fixedly installed on the base 24 by a telescopic rod. The upper surface of the lower retainer mold table 25 has a lower mold slot adapted to the structure of the lower retainer 7.

[0049] Please see Figures 4-8 The lower retainer loading mechanism 5 includes a frame 51 fixed on the work frame 1. A material column 53 for stacking and sleeved lower retainers 7 is suspended on the frame 51. A retainer release structure located at the lower end of the material column 53 and used for lowering and positioning the lower retainer 7 is installed at the lower end of the frame 51.

[0050] The cage release structure includes a limiting plate 52 fixedly installed at the lower end of the frame 51. The limiting plate 52 has a lowering opening with an inner diameter larger than that of the lower cage 7. Electric push rods 54 are fixedly installed on the front and rear end walls of the limiting plate 52. The telescopic end of the electric push rod 54 is fixedly connected to a limiting template 55 that slides on the lower end wall of the limiting plate 52 and acts on the lower cage 7. The lower cage feeding mechanism 5 has the same structure as the upper cage feeding mechanism 6. The upper cage feeding mechanism 6 is used to intermittently release and feed the upper cage 8.

[0051] First, the lower retainer 7 is lowered into position. The lower retainer mold table 25 is raised upwards and brought close to the retainer release structure of the lower retainer feeding mechanism 5. Through the rapid retraction and reset action of the electric push rod 54, the lower retainer 7 at the bottom of the material column 53 falls onto the lower retainer mold table 25. The lower mold groove on the lower retainer mold table 25 is used to position the lower retainer 7. After the lower retainer 7 is in position, the lower retainer feeding mechanism 5 is reset downwards to its initial position. Then, the pre-installed lower retainer 7 is rotated with the rotary assembly table 2 to below the upper retainer feeding mechanism 6, where the directional feeding of the assembly component 3 is performed.

[0052] Please see Figures 9-13 The pushing structure 4 includes a slide table 42 that is slidably installed on the work frame 1 and is vertically arranged with the upper holding frame feeding mechanism 6. Support frames 41 are fixedly installed on both the front and rear sides of the slide table 42 along its moving direction. A lifting platform is installed on the lower rotating disk 22 through a pair of telescopic hydraulic cylinders 43. Multiple assembly mold tables 44 for supporting and limiting the assembly 3 are fixed on the lifting platform. The assembly 3 after ball separation is supported and transported by the assembly mold tables 44.

[0053] In this process, the sliding table 42 moves laterally to transport the assembly mold table 44 loaded with the assembly component 3 to the assembly slot 231. The lifting platform is raised, and the assembly mold table 44 drives the assembly component 3 to move below the upper retainer feeding mechanism 6. Similarly, the retainer release structure at the upper retainer feeding mechanism 6 feeds the lowermost upper retainer 8 onto the assembly component 3. The upper retainer 8 is pre-assembled directly with the upper end face of the assembly component 3. Then the assembly mold table 44 is retracted downwards. The assembly component 3 with the pre-assembled upper retainer 8 is statically limited on the assembly slot 231. The outer diameter of the assembly mold table 44 is smaller than the inner diameter of the assembly slot 231. After the assembly mold table 44 descends to below the assembly slot 231, it is retracted laterally by the sliding table 42, so that the assembly mold table 44 closest to the rotating assembly table 2 moves to the support frame 41 for continuous conveying of the assembly component 3 statically placed on the support frame 41.

[0054] The lower cage 7 is pre-assembled from bottom to top onto the lower end face of the assembly 3. The upper and lower cages are pre-assembled synchronously at the same station, which provides bidirectional constraint on the upper and lower sides of the balls in the assembly 3. Compared with the existing step-by-step assembly of the upper and lower cages, especially for the rotary step-by-step pre-assembly mode, if the lower cage is not completely fixed, the balls may fall off due to centrifugal force. The synchronous pre-assembly of the upper and lower cages at the same station completes the bidirectional constraint of the balls, reducing the risk of displacement of the balls due to the lack of constraint on one side.

[0055] Please see Figure 14 The riveting mechanism 9 includes a U-shaped frame 91 fixedly installed on the work frame 1. A pair of riveting cylinders 92 are fixed at the top of the U-shaped frame 91. The telescopic ends of the riveting cylinders 92 pass through the top of the U-shaped frame 91 and are fixedly connected to a lifting platform 93. A riveting template 94 with the same axial direction as the assembly groove 231 is fixed at the bottom of the lifting platform 93.

[0056] The lower end face of the riveting template 94 is provided with an upper mold groove that is compatible with the structure of the upper retainer 8. The assembly with the upper and lower retainers pre-installed is rotated to the riveting mechanism 9 and the upper rotating disk 23 is raised appropriately, so that the assembly 3 is disengaged from the assembly slot 231. The lower retainer 7, the upper retainer 8 and the assembly 3 are riveted together by the downward pressure of the riveting template 94, thus completing the bearing riveting assembly.

[0057] The unloading mechanism includes an unloading rack 10 fixedly installed on the upper end of the work frame 1 and extending one end into the inner side of the hollow sleeve 21. An electric push rod 11 is fixedly installed on the inner end of the unloading rack 10, located inside the hollow sleeve 21 and corresponding to the position of the assembly slot 231, with its telescopic end extending outward from the unloading rack 10. Each assembly slot 231 has a push hole 232 on its inner end wall, corresponding to the position of the telescopic end of the electric push rod 11. A slide table located on the outer edge of the assembly slot 231 is fixed at the outer end of the unloading rack 10. The assembled bearing is rotated and transported to the unloading station of the unloading mechanism, and pushed out by the electric push rod 11. The entire process is carried out synchronously and repeatedly at each station, realizing the design goals of unified transmission system, concentrated assembly space, simplified process, and efficient production process.

[0058] Example 2: The present invention also proposes a method for using an automatic directional feeding and riveting device for ball bearing assembly, comprising the following steps:

[0059] S1. Preparation: The lower retainer 7 and the upper retainer 8 are pre-stacked on the lower retainer feeding mechanism 5 and the upper retainer feeding mechanism 6, respectively.

[0060] S2. Pre-assembly work: First, lower the lower retainer 7 into place, raise the lower retainer mold table 25 to approach the lower retainer feeding mechanism 5 and retainer release structure, lower the lower retainer 7 through the retainer release structure, the lower retainer 7 falls on the lower retainer mold table 25 and returns to the initial position as the lower retainer feeding mechanism 5 descends, and rotate the pre-assembled lower retainer 7 with the rotary assembly table 2 to below the upper retainer feeding mechanism 6;

[0061] Next, the assembly 3 is loaded. The assembly 3 after ball separation is laterally conveyed into the lower part of the upper retainer loading mechanism 6 through the pushing structure 4. During this process, the assembly mold table 44 is raised upward until the assembly 3 is close to the retainer release structure below the upper retainer loading mechanism 6.

[0062] Finally, the upper retainer 8 is pre-installed. Similarly, the upper retainer 8 is directly lowered onto the assembly 3 through the retainer release structure. After the upper retainer 8 is placed on the assembly 3, it is supported on the assembly slot 231 as the assembly mold table 44 descends. The retraction push structure 4 exposes the lower end of the assembly slot 231. At this time, the upper rotary table 23 is raised until the lower retainer 7 is limited to the lower part of the assembly 3. The lower retainer 7 and the upper retainer 8 are pre-assembled on the upper and lower end faces of the assembly 3 at the same station.

[0063] S3. Riveting operation: Rotate the pre-assembled lower retainer 7 and upper retainer 8 of the combined assembly 3 to the riveting mechanism 9, and raise the upper rotating disk 23 upwards to disengage the combined assembly 3 from the assembly slot 231. The lower retainer 7 and upper retainer 8 are riveted to the combined assembly 3 by pressing down the riveting template 94.

[0064] S4. Unloading operation: The assembled bearing is rotated and transported to the unloading mechanism. The electric push rod 11 is started, and the telescopic end of the electric push rod 11 passes through the push hole 232 to push the bearing out.

[0065] In summary, by setting up a rotary assembly table and sequentially distributing a lower retainer loading mechanism, an upper retainer loading mechanism, a riveting mechanism, and a unloading mechanism along a cross-shaped vertical direction, the lower retainer loading mechanism 5 and the upper retainer loading mechanism 6 pre-stack the lower retainer 7 and the upper retainer 8, respectively. The lower retainer mold table 25 is used to pre-position the lower retainer 7. The lower retainer 7 rotates with the rotary assembly table 2 to the retainer assembly station. Then, the ball-separated assembly 3 is directionally conveyed into the retainer assembly station through the pushing structure 4. The upper retainer 8 is released onto the assembly 3 through the retainer release structure. The upper retainer 8 is nested with the balls. The assembly mold table 44 is retracted, and the lower retainer 7 is pushed up until it is in contact with the assembly 3 to achieve the nesting of the balls.

[0066] The pre-assembled assembly with both upper and lower retainers is then rotated to the riveting station. The retainers are riveted together by the riveting mechanism 9 to complete the bearing riveting assembly. The assembled bearing is then rotated and transported to the unloading station, where it is pushed out by the electric push rod 11. The entire process is carried out synchronously and repeatedly at each station, achieving the design goals of unified transmission system, centralized assembly space, simplified process, and efficient production.

[0067] The above description is merely a preferred embodiment of the present invention; however, the scope of protection of the present invention is not limited thereto; any equivalent substitutions or modifications made by those skilled in the art within the technical scope disclosed in the present invention, based on the technical solution and its improved concept, should be covered within the scope of protection of the present invention.

Claims

1. An automatic directional feeding and riveting device for ball bearing assembly, comprising a workbench (1), characterized in that: The work rack (1) upper end two sides are respectively equipped with rotary assembly table (2) and be used for to the closing sleeve assembly (3) transmission push structure (4), the rotary assembly table (2) circumferential direction is sequentially arranged with lower holder feeding mechanism (5), upper holder feeding mechanism (6), riveting pressure mechanism (9) and unloading mechanism, lower holder feeding mechanism (5) and upper holder feeding mechanism (6) structure are identical and are used for the directional feeding of lower holder (7), upper holder (8) respectively, wherein upper holder feeding mechanism (6) is provided with the holder preloading station on the side corresponding to push structure (4); The rotary assembly table (2) includes a hollow sleeve (21), a lower rotating disc (22), and an upper rotating disc (23). The upper rotating disc (23) and the lower rotating disc (22) are respectively provided with a plurality of upper and lower corresponding assembly grooves (231) for supporting the closing sleeve assembly (3) and a jacking assembly for jacking preloading of the lower holder (7) in the circumferential direction. The lower holder feeding mechanism (5) includes a rack (51), a material column (53) for stacking the lower holder (7), and a holder release structure. The push structure (4) includes a sliding table (42) slidingly installed on the work rack (1). The sliding table (42) is fixedly installed with support frames (41) on both sides along its moving direction. The lower rotating disc (22) is installed with a lifting table through a pair of telescopic oil cylinders (43). The lifting table is fixedly installed with a plurality of sleeve assembly (3) compatible sleeve die tables (44).

2. The automatic orienting and feeding riveting device for ball bearing assembly according to claim 1, characterized in that: The jacking assembly includes a base (24) fixedly installed on the lower rotating disc (22) below the assembly groove (231). The base (24) is fixedly installed with a lower holder die table (25) through a telescopic rod. The lower holder die table (25) is provided with a lower die groove on the upper end surface, which is compatible with the structure of the lower holder (7).

3. The automatic orienting and feeding riveting device for ball bearing assembly according to claim 1, characterized in that: The holder release structure includes a limiting disc (52) fixedly installed on the lower end of the rack (51). The limiting disc (52) is provided with a lower discharge opening with a larger inner diameter than the lower holder (7). The limiting disc (52) is fixedly installed with an electric push rod (54) on the front and rear end walls. The telescopic end of the electric push rod (54) is fixedly connected with a limiting die plate (55) sliding on the lower end wall of the limiting disc (52) and acting on the lower holder (7).

4. The automatic orienting and feeding riveting device for ball bearing assembly according to claim 1, characterized in that: A pair of support frames (41) are provided with a supporting space with a gap smaller than the outer diameter of the outer circle of the closing sleeve assembly (3) and larger than the inner diameter of the outer circle of the closing sleeve assembly (3).

5. The automatic orienting and feeding riveting device for ball bearing assembly according to claim 4, characterized in that: The sleeve die table (44) has an outer diameter smaller than the width of the supporting space. The sleeve die table (44) is provided with a sleeve die groove on the upper end surface, which is compatible with the structure of the closing sleeve assembly (3). The outer diameter of the sleeve die table (44) is smaller than the outer diameter of the outer circle of the closing sleeve assembly (3) and larger than the inner diameter of the outer circle of the closing sleeve assembly (3).

6. The automatic orienting and feeding riveter for ball bearing assembly according to claim 1, characterized in that: The riveting mechanism (9) comprises a U-shaped frame (91) fixedly installed on the workbench (1), a lifting platform (93) extending downward is installed at the top end of the U-shaped frame (91) through a pair of riveting oil cylinders (92), the bottom end of the lifting platform (93) is fixedly provided with a riveting die plate (94) which is consistent with the axial direction of the assembly groove (231), and the lower end face of the riveting die plate (94) is provided with an upper die groove which is matched with the structure of the upper retaining frame (8).

7. The automatic orienting, feeding and riveting device for ball bearing assembly according to claim 6, characterized in that: The blanking mechanism comprises a blanking frame (10) fixedly installed on the upper end of the workbench (1) and extending to the inside of the hollow sleeve (21), an electric pushing rod (11) is fixedly installed at the inner end of the blanking frame (10) and located on the inside of the hollow sleeve (21), the position of the electric pushing rod (11) corresponds to that of the assembly groove (231), and the telescopic end of the electric pushing rod (11) extends to the outside of the blanking frame (10), and the inner end wall of each assembly groove (231) is provided with a pushing hole (232) corresponding to the position of the telescopic end of the electric pushing rod (11).

8. The automatic orienting, feeding and riveting device for ball bearing assembly according to claim 7, characterized in that: The outer end of the blanking frame (10) is fixedly provided with a sliding table located at the outer edge of the assembly groove (231).

Images