Automatic ball distributing riveting press machine applied to ball bearing assembly

Abstract

The invention discloses an automatic ball separation riveting press applied to ball bearing assembly, which is used for improving a linear assembly line in the prior art, and is characterized in that a lower retainer is preassembled before a sleeve assembly is fed by setting a circumferential rotary assembly mode, so that when a clamping opening in which the lower retainer and the sleeve assembly are preassembled is rotated to the lower part of a ball separation assembly, the ball separation assembly rotates to the lower part of the ball separation assembly; after balls are separated through the ball separation assembly, a lower retainer is pre-installed at the bottom of the sleeving assembly through a lower retainer die holder which is jacked upwards to limit the lower ends of a plurality of balls in the sleeving assembly, a ball limiting structure does not need to be additionally arranged, and then the lower retainer pre-installed at the bottom of the sleeving assembly rotates to the upper retainer feeding assembly together. And then the upper retainer is dropped to the upper end part of the fitting assembly by the upper retainer feeding assembly to finish preassembling of the upper retainer and the lower retainer, then the upper retainer and the lower retainer are conveyed to the riveting assembly, and the riveting work is realized by utilizing a downwards-pressed riveting head, so that unified cooperation of a transmission system is realized, and the assembly process is simplified.

Description

Technical Field

[0001] The invention relates to the technical field of bearing assembly, and more particularly to an automatic ball-separating riveting press used for ball bearing assembly. Background Art

[0002] In the bearing industry, deep groove ball bearings are widely used due to their compact structure, easy processing and low cost. Deep groove ball bearings are composed of a wave-shaped cage, balls, inner rings and outer rings. During the assembly of deep groove ball bearings, the wave-shaped cages are riveted with rivets. Two half cages with the same shape are meshed and connected by rivets to form a whole. The two wave-shaped parts are riveted together to form pockets, and the balls are isolated in the pockets respectively.

[0003] During the assembly process of the bearing, the balls must first be installed between the inner and outer ring grooves, and a ball divider is used to evenly distribute the multiple balls in the grooves to form a bearing assembly. The upper and lower half cages are then placed in the corresponding positions of the balls in the assembly through a loading device, and the connecting rivets on the cage are then riveted.

[0004] In the traditional assembly process, most of the linear assembly lines are used. After the balls are separated, a limiting structure is generally required to position the balls. The limiting structure is transmitted to the next assembly station together with the separated assembly. In this process, two sets of transmission mechanisms successively place the upper and lower retaining frames at the upper and lower positions of the assembly corresponding to the balls. Before the upper and lower retaining frames are pre-installed, the limiting structure needs to be removed, and then the upper and lower retaining frames are pre-installed in turn. Finally, the bearing assembly with the pre-installed upper and lower retaining frames is transmitted to the bottom of the riveting mechanism. The pressure of the riveting mechanism causes the butt rivets to undergo plastic deformation to form a riveted connection between the upper and lower retaining frames. Finally, the bearing is unloaded through the unloading mechanism after riveting. The entire tooling is numerous, the assembly path is long, and the overall assembly space is expanded, which has certain disadvantages. Summary of the invention

[0005] The purpose of the present invention is to solve the existing practical assembly problems. Compared with the existing technology, an automatic ball dividing and riveting machine for ball bearing assembly is provided. The lower retainer is pre-installed before the combined component is loaded. Therefore, when the clamping mouth of the pre-installed lower retainer and the combined component is rotated to the bottom of the ball dividing component, after the ball is divided by the ball dividing component, the lower retainer is pre-installed at the bottom of the combined component by the upwardly supported lower retainer die seat to limit the lower ends of multiple balls in the combined component, without the need to set up a ball limiting structure separately. Subsequently, the lower retainer pre-installed at the bottom of the combined component is rotated together to the upper retainer loading assembly, and then the upper retainer loading assembly drops the upper retainer to the upper end of the combined component to complete the pre-installation of the upper and lower retainers, and then transmits it to the riveting assembly, and the riveting work is carried out by the downward pressing riveting head, so as to realize the unified cooperation of the transmission system and simplify the assembly process.

[0006] The object of the present invention can be achieved by the following technical scheme: an automatic ball separation riveting press used for ball bearing assembly, comprising a rotating disk which is rotatably driven and installed on an assembly table and has a plurality of clamping openings in an annular shape, characterized in that: a lower cage feeding assembly, a ball separation assembly, an upper cage feeding assembly and a riveting assembly are respectively installed in the circumferential direction of the assembly table, which are arranged adjacent to each other end to end;

[0007] The clamping opening between the lower cage loading assembly and the ball distribution assembly is set as a loading station for loading the sleeve assembly pre-installed with balls, and a plurality of lower cage pre-installed assemblies corresponding to the positions of the clamping openings are fixedly installed at the lower end of the rotating disk, and the lower cage pre-installed assembly includes a driving seat fixedly installed with the rotating disk, and a lower cage die seat that can be vertically lifted is provided on the driving seat;

[0008] The ball distribution assembly includes a ball distribution rack fixed on the assembly table, on which a connecting plate with a plurality of ball distribution rods at the bottom is fixedly installed via an electric push cylinder, and the riveting assembly includes a fixed seat fixed on the assembly table, on which a rotating frame is rotationally driven and installed, and on the rotating frame a lifting platform is installed via an electric push cylinder, which can be lifted and lowered in a vertical direction and has a riveting head at the bottom.

[0009] Furthermore, the lower retainer loading assembly and the upper retainer loading assembly are both composed of a guide rod and a release structure installed under the guide rod. The two guide rods are respectively used to stack and penetrate the lower retainer and the upper retainer. The release structure uses an existing electric pushing structure. The lower retainer loading assembly and the upper retainer loading assembly are respectively used to intermittently load the lower retainer and the upper retainer from top to bottom. This is an existing commonly used technology. The purpose is to load the lower retainer and the upper retainer from the lowest point of the two guide rods at a preset loading time.

[0010] Furthermore, the plurality of driving seats are fixedly connected to the outer end wall of the rotating disk via an annular connecting frame, an electric push rod for lifting the lower retaining frame die base is embedded inside the driving seat, and a plurality of lower retaining frame pre-assembly components corresponding to the clamping port positions are added to the bottom end of the rotating disk. Before the assembly is loaded, the lower retaining frame loading component is used to lower the lower retaining frame onto the lower retaining frame die base.

[0011] Furthermore, the loading station is provided with a conveyor belt extending outward, and the transmission belt is provided with a robot for loading the sleeve assembly loaded with balls to the clamping port.

[0012] Furthermore, the upper end surface of the lower retainer die base is provided with a plurality of lower pocket die grooves adapted to the lower retainer, and the bottom end surface of the rivet head is provided with a plurality of upper pocket die grooves adapted to the upper retainer. The lower retainer die base and the rivet head end surface structures are adapted to the lower retainer and upper retainer structures respectively.

[0013] Furthermore, an engaging abutment groove is provided at the end of the riveting head located on the inner side of the upper pocket mold groove, and an annular abutment platform corresponding to the position of the engaging abutment groove is provided on the outer peripheral fixed sleeve of the riveting head. During riveting, the riveting head is pressed down onto the upper retaining frame in the sleeve assembly until the annular abutment platform and the engaging abutment groove respectively abut against the upper end surfaces of the outer ring and the inner ring on the sleeve assembly to complete the riveting.

[0014] Furthermore, a plurality of adsorption holes are provided at the top of the upper pocket mold grooves, an annular air cavity connected to the plurality of adsorption holes is provided inside the upper end of the riveting head, and an air pump connected to the annular air cavity is fixed to the top of the lifting platform.

[0015] Furthermore, the lower retainer die base and the riveting head are respectively provided with a lower positioning hole and an upper positioning hole adapted to the position of the rivet on the lower retainer.

[0016] Compared with the prior art, the advantages of the present invention are:

[0017] (1) The present invention improves the linear assembly line in the prior art by providing a rotating disk with a plurality of clamping openings and arranging various assembly components in the circumferential direction of the rotating disk. The lower retainer is pre-installed before the assembly is loaded. Therefore, when the clamping opening of the pre-installed lower retainer and the assembly is rotated to the bottom of the ball dividing assembly, the balls are divided by using a plurality of ball dividing rods with gradually decreasing lengths on the ball dividing assembly. Then, the lower retainer is pre-installed at the bottom of the assembly by the upwardly supported lower retainer die seat to limit the lower ends of the plurality of ball bearings in the assembly. There is no need to provide a ball limiting structure separately. Subsequently, the lower retainer pre-installed at the bottom of the assembly is rotated together to the upper retainer loading assembly, and then the upper retainer loading assembly drops the upper retainer to the upper end of the assembly to complete the pre-installation of the upper and lower retainers. Subsequently, the lower retainer is transferred to the riveting assembly, and the riveting work is performed by using a downwardly pressed riveting head. A circular rotating installation method is adopted to achieve concentrated assembly space.

[0018] (2) This solution also adds a plurality of adsorption holes connected to the upper pocket die groove on the riveting head. The plurality of adsorption holes are connected to an air pump. After the riveting head is pressed down, the bearing riveting is completed. When the riveting head is lifted upward, the air pump is started synchronously. The negative pressure at the plurality of adsorption holes drives the assembled bearing to be lifted upward and out of the clamping mouth. Subsequently, the rotating frame is rotated at a certain angle outside the assembly table to cancel the negative pressure state and complete the automatic blanking of the bearing. In this process, there is no need to set up a separate bearing blanking structure, so that the transmission system can be coordinated and the assembly process can be simplified. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the structure of the present invention when it is working;

[0020] Figure 2 It is a schematic structural diagram of the joint between the rotating disk and multiple groups of lower retaining frame pre-assembled components of the present invention;

[0021] Figure 3 It is a schematic diagram of the structure of the present invention when loading the lower retainer;

[0022] Figure 4 It is a structural schematic diagram of the joint between the lower retainer feeding assembly and the lower retainer pre-assembly assembly of the present invention;

[0023] Figure 5 It is a structural schematic diagram of another viewing angle of the present invention when it is working;

[0024] Figure 6 A top view of the riveting assembly of the present invention;

[0025] Figure 7 A bottom view of the riveting assembly of the present invention;

[0026] Figure 8It is a structural schematic diagram of the riveting head of the present invention;

[0027] Fig. 9 It is a schematic diagram of the structure of the present invention when the sleeve assembly is lifted upward after riveting is completed;

[0028] Fig.10 It is a schematic structural diagram of the present invention when the bearing after riveting is turned outward for cutting.

[0029] Description of the numbers in the figure:

[0030] 1. Assembly table; 2. Rotating plate; 201. Clamping mouth; 3. Fitting assembly; 4. Ball; 5. Lower cage; 501. Rivet; 6. Upper cage; 7. Driving seat; 8. Lower cage die seat; 801. Lower pocket die groove; 9. Electric push rod; 10. Lower cage loading assembly; 11. Upper cage loading assembly; 12. Ball distribution rack; 13. Ball distribution rod; 14. Fixed seat; 15. Rotating rack; 16. Lifting platform; 17. Riveting head; 171. Upper pocket die groove; 172. Adsorption hole; 18. Air pump. DETAILED DESCRIPTION

[0031] The following will combine the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all the embodiments. All other embodiments obtained by ordinary technicians in this field without creative work based on the embodiments of the present invention belong to the scope of protection of the present invention.

[0032] Example 1: The present invention discloses an automatic ball separation riveting press for ball bearing assembly, see Figure 1 , Figure 2 , comprising a rotating disk 2 which is rotatably driven and installed on an assembly platform 1, and a plurality of clamping openings 201 for clamping are provided in an annular manner on the rotating disk 2, characterized in that: a lower retainer loading assembly 10, a ball dividing assembly, an upper retainer loading assembly 11 and a riveting assembly are respectively installed in the circumferential direction of the assembly platform 1, which are arranged adjacent to each other end by end and are separated by a clamping opening 201 station;

[0033] The clamping opening 201 between the lower cage loading assembly 10 and the ball distribution assembly is set as a loading station for loading the sleeve assembly 3 pre-installed with the ball 4, and a conveyor belt extending outward is provided at the loading station, and a manipulator for loading the sleeve assembly 3 loaded with the ball 4 to the clamping opening 201 is provided at the transmission belt;

[0034] See also Figure 3-Figure 5The lower retainer loading assembly 10 and the upper retainer loading assembly 11 are both composed of a guide rod and a release structure installed under the guide rod. The two guide rods are respectively used to stack and penetrate the lower retainer 5 and the upper retainer 6. The lower retainer 5 is provided with a rivet 501. The release structure adopts the existing electric push-type structure. The lower retainer loading assembly 10 and the upper retainer loading assembly 11 are respectively used to intermittently load the lower retainer 5 and the upper retainer 6 from top to bottom. This is an existing common technology. The purpose is to load the lower retainer 5 and the upper retainer 6 from the lowest position of the two guide rods at a preset loading time.

[0035] A plurality of lower retainer pre-assembly components corresponding to the positions of the clamping opening 201 are fixedly installed at the lower end of the rotating disk 2, and the lower retainer pre-assembly components include a driving seat 7 fixedly installed with the rotating disk 2, and a lower retainer die seat 8 with lifting movement is provided on the driving seat 7, and a plurality of driving seats 7 are fixedly connected to the outer end wall of the rotating disk 2 through an annular connecting frame, and an electric push rod 9 for lifting the lower retainer die seat 8 is embedded and installed inside the driving seat 7, and a plurality of lower retainer pre-assembly components corresponding to the positions of the clamping opening 201 are added at the bottom end of the rotating disk 2;

[0036] Before loading the sleeve assembly 3, the lower retainer loading assembly 10 is used to move the lower retainer 5 to the lower retainer die base 8. In this process, the electric push rod 9 is used to lift the lower retainer die base 8 upward until the lower retainer die base 8 passes through the clamping opening 201 and approaches the bottom of the guide rod, which is conducive to the lower retainer 5 to fall stably on the lower retainer die base 8 and pre-install the lower retainer 5.

[0037] The lower retainer 5 is pre-installed before the combined assembly 3 is loaded. After the pre-installation, the clamping opening 201 of the lower retainer 5 is rotated to the loading station, and the combined assembly 3 loaded with the balls 4 is loaded to the clamping opening 201 by a manipulator, and then the clamping opening 201 pre-installed with the lower retainer 5 and the combined assembly 3 is rotated to the bottom of the ball separation assembly;

[0038] See also Figure 5 The ball distribution assembly includes a ball distribution rack 12 fixed on the assembly table 1, and a connecting plate with a plurality of ball distribution rods 13 at the bottom end is fixedly installed on the ball distribution rack 12 through an electric push cylinder. The bottom end heights of the plurality of ball distribution rods 13 are arranged to decrease in sequence from front to back along the circumferential direction. When the ball is distributed, the lower retainer die seat 8 pre-installed with the lower retainer 5 moves downward to reserve a space for ball distribution;

[0039] At this time, the connecting plate is pressed down by the electric push cylinder, and the ball dividing rod 13 with a gradually decreasing length is used to divide the balls, so that the multiple balls 4 are evenly distributed in the grooves of the inner and outer rings of the sleeve component 3. At this time, the lower retaining frame mold seat 8 is reset upward until the lower retaining frame 5 supports the lower end of the ball 4, and the lower end of the multiple balls 4 is limited. This process does not require the additional setting of a ball limiting structure. When the upper retaining frame 6 is subsequently loaded and riveted, the balls 4 will not shake in the sleeve component 3.

[0040] The lower retainer 5 pre-installed at the bottom of the sleeve component 3 rotates together to the upper retainer loading component 11, and then the upper retainer loading component 11 drops the upper retainer 6 to the upper end of the sleeve component 3, completing the pre-installation of the upper and lower retainers, and then transported to the riveting component, and the riveting work is carried out by the riveting component, and a circular rotary installation method is adopted to realize the centralized assembly space.

[0041] Embodiment 2: Based on Embodiment 1, this embodiment performs structural optimization processing on the riveting assembly, as follows:

[0042] See also Figure 5-Figure 10 The pressure riveting assembly includes a fixed seat 14 fixed on the assembly table 1, a rotating frame 15 is installed on the fixed seat 14 for rotational driving, a lifting platform 16 is installed on the rotating frame 15 for lifting in the vertical direction through an electric push cylinder 2, a riveting head 17 is provided at the bottom end of the lifting platform 16, and an engaging abutment groove is provided at the end of the riveting head 17 located on the inner side of the upper pocket mold groove 171, and an annular abutment platform corresponding to the position of the engaging abutment groove is fixedly sleeved on the outer periphery of the riveting head 17;

[0043] The upper end surface of the lower retainer die base 8 is provided with a plurality of lower pocket die grooves 801 adapted to the lower retainer 5, and the bottom end surface of the rivet pressing head 17 is provided with a plurality of upper pocket die grooves 171 adapted to the upper retainer 6. The end surface structures of the lower retainer die base 8 and the rivet pressing head 17 are adapted to the structures of the lower retainer 5 and the upper retainer 6, respectively, that is, the convex parts formed outwardly of the lower retainer 5 and the upper retainer 6 correspond to the lower pocket die grooves 801 and the upper pocket die grooves 171, respectively.

[0044] During riveting, the riveting head 17 is pressed down onto the upper retainer 6 in the fitting component 3 until the annular abutment platform and the interlocking abutment groove respectively abut against the upper end surfaces of the outer ring and the inner ring on the fitting component 3, and the horizontal supporting surfaces on the lower retainer die base 8 and the riveting head 17 adjacent to the lower pocket die groove 801 and the upper pocket die groove 171 act as riveting and docking force application surfaces, thereby protecting the protruding positions of the pocket holes of the lower retainer 5 and the upper retainer 6, and completing the riveting.

[0045] In addition, a plurality of upper pocket die grooves 171 are provided with adsorption holes 172 at the top, a ring-shaped air cavity connected to the plurality of adsorption holes 172 is provided inside the upper end of the riveting head 17, an air pump 18 connected to the ring-shaped air cavity is fixed to the top of the lifting platform 16, and a lower positioning hole and an upper positioning hole adapted to the position of the rivet 501 on the lower retaining frame 5 are respectively provided on the lower retaining frame die base 8 and the riveting head 17. After the riveting head 17 is pressed down, the bearing riveting is completed. When the riveting head 17 is lifted upward, the air pump 18 is started synchronously, and the assembled bearing is lifted upward and separated from the clamping port 201 by the negative pressure at the plurality of adsorption holes 172. Subsequently, the rotating frame 15 is rotated at a certain angle outside the assembly platform 1 to cancel the negative pressure state, thereby completing the automatic blanking of the bearing.

[0046] In summary: the present scheme is an improvement on the linear assembly line in the prior art, by setting a rotary disk 2 with a plurality of clamping openings 201, and arranging adjacent lower retaining frame loading components 10, ball dividing components, upper retaining frame loading components 11, and riveting components in the circumferential direction of the rotary disk 2, and adding a plurality of lower retaining frame pre-assembly components corresponding to the positions of the clamping openings 201 at the lower end of the rotary disk 2. The overall assembly structure is distributed along the circumferential direction of the rotary disk 2, and a circular rotary installation method is adopted to realize the concentration of the assembly space.

[0047] First, the lower retainer 5 is pre-installed at the previous station before the fitting assembly 3 is loaded, and the clamping port 201 loaded with the lower retainer 5 is rotated to the loading station before loading the fitting assembly 3. Therefore, when the lower retainer 5 pre-installed and the clamping port 201 of the fitting assembly 3 are rotated to the bottom of the ball dividing assembly, the balls are divided by using a plurality of ball dividing rods 13 with gradually decreasing lengths on the ball dividing assembly, and then the lower retainer 5 is pre-installed at the bottom of the fitting assembly 3 by the lower retainer die seat 8 that is supported upward to limit the lower ends of the plurality of balls 4 in the fitting assembly 3, without the need to set up an additional ball limiting structure.

[0048] Subsequently, the lower retainer 5 pre-installed at the bottom of the sleeve component 3 rotates together to the upper retainer loading component 11, and then the upper retainer loading component 11 drops the upper retainer 6 to the upper end of the sleeve component 3, completing the pre-installation of the upper and lower retainers, and then transporting it to the riveting assembly, using the downward pressing riveting head 17 to achieve the riveting work. After the riveting work is completed, start the air pump 18, and rely on the negative pressure at the multiple adsorption holes 172 to drive the assembled bearing to lift up and out of the clamping port 201. Subsequently, the rotating frame 15 is rotated at a certain angle outside the assembly table 1 to cancel the negative pressure state and complete the automatic blanking of the bearing. In this process, there is no need to set up a separate bearing blanking structure, thereby realizing unified cooperation of the transmission system and simplifying the assembly process.

[0049] The above are only preferred specific implementation modes of the present invention; however, the protection scope of the present invention is not limited thereto; any technician familiar with the technical field within the technical scope disclosed by the present invention; any equivalent replacement or change based on the technical solution and improved concept of the present invention shall be covered within the protection scope of the present invention.

Claims

1. An automatic ball riveting press for ball bearing assembly, comprising a rotating disk (2) rotatably mounted on an assembly table (1) and having a plurality of clamping openings (201) in an annular shape, characterized in that: The assembly table (1) is respectively provided with a lower cage loading assembly (10), a ball distribution assembly, an upper cage loading assembly (11) and a riveting assembly arranged adjacent to each other end to end in a circumferential direction; The clamping opening (201) between the lower retaining frame loading assembly (10) and the ball distribution assembly is set as a loading station for loading the sleeve assembly (3) pre-installed with balls (4), and a plurality of lower retaining frame pre-installed assemblies corresponding to the positions of the clamping opening (201) are fixedly mounted on the lower end of the rotating disk (2), and the lower retaining frame pre-installed assemblies include a driving seat (7) fixedly mounted on the rotating disk (2), and a lower retaining frame mold seat (8) that can be vertically lifted is provided on the driving seat (7); The ball distribution assembly comprises a ball distribution rack (12) fixed on the assembly platform (1), a connecting plate with a plurality of ball distribution rods (13) at the bottom end of which is fixedly mounted on the ball distribution rack (12) via an electric push cylinder, and the riveting assembly comprises a fixed seat (14) fixed on the assembly platform (1), a rotating frame (15) is rotatably mounted on the fixed seat (14), and a lifting platform (16) is mounted on the rotating frame (15) via an electric push cylinder, which can be lifted and lowered in a vertical direction and has a riveting head (17) at the bottom end.

2. The automatic ball separation riveting machine for ball bearing assembly according to claim 1 is characterized in that: The lower retaining frame loading assembly (10) and the upper retaining frame loading assembly (11) both consist of a guide rod and a release structure installed below the guide rod.

3. The automatic ball separation riveting press for ball bearing assembly according to claim 1 is characterized in that: The plurality of drive seats (7) are fixedly connected to the outer end wall of the rotating disk (2) via an annular connecting frame, and an electric push rod (9) for lifting the lower retaining frame mold base (8) is embedded and installed inside the drive seat (7).

4. The automatic ball separation riveting press for ball bearing assembly according to claim 1 is characterized in that: The loading station is provided with a conveyor belt extending outward, and the conveyor belt is provided with a manipulator for loading the sleeve assembly (3) loaded with balls (4) to the clamping port (201).

5. The automatic ball separation riveting press for ball bearing assembly according to claim 1 is characterized in that: The upper end surface of the lower retainer die base (8) is provided with a plurality of lower pocket die grooves (801) adapted to the lower retainer (5), and the bottom end surface of the riveting head (17) is provided with a plurality of upper pocket die grooves (171) adapted to the upper retainer (6).

6. The automatic ball separation riveting press for ball bearing assembly according to claim 5, characterized in that: An engaging abutment groove is provided at the end of the riveting head (17) located inside the upper pocket die groove (171), and an annular abutment platform corresponding to the position of the engaging abutment groove is fixedly sleeved on the outer periphery of the riveting head (17).

7. The automatic ball separation riveting press for ball bearing assembly according to claim 6, characterized in that: A plurality of the upper pocket mold grooves (171) are provided with adsorption holes (172) at the top, an annular air cavity connected to the plurality of adsorption holes (172) is provided inside the upper end of the riveting head (17), and an air pump (18) connected to the annular air cavity is fixed to the top of the lifting platform (16).

8. The automatic ball separation riveting press for ball bearing assembly according to claim 7, characterized in that: The lower retainer die base (8) and the riveting head (17) are also respectively provided with a lower positioning hole and an upper positioning hole that match the position of the rivet (501) on the lower retainer (5).

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