Opening gathering device for tapered roller bearing retainer

Abstract

The utility model discloses a tapered roller bearing retainer opening gathering device, a machine tool is provided with a machine tool workbench and a machine tool sliding block moving vertically, and the opening gathering device comprises a lower die and an upper die. The lower die comprises a lower die plate, a male die connector and a stretching male die, the male die connector is detachably fixed between the stretching male die and the lower die plate, and the top of the stretching male die is provided with a conical bearing face matched with the inner wall of the retainer. The upper die is annular and located over the lower die, the upper die comprises an upper die plate, a material returning base plate, a material returning plate and an opening gathering female die, the upper die plate is installed on a machine tool sliding block, the material returning base plate is detachably fixed between the material returning plate and the upper die plate, and the opening gathering female die is annular and fixed to the upper die plate. A conical extrusion face matched with the outer wall of the retainer is arranged in the opening closing female die, an opening closing face is formed below the conical extrusion face, the opening closing face can extrude a large-diameter ring frame towards the center of the retainer, opening closing treatment on the retainer is achieved, the treatment efficiency is high, and the opening closing effect on the retainer is good.

Description

Technical Field

[0001] The utility model belongs to the technical field of cage closing, and in particular relates to a cage closing device for a tapered roller bearing. Background Art

[0002] The improvement of equipment power and efficiency in various countries is a symbol of the technical and economic strength of each country, which has great and far-reaching significance. With the development of domestic and foreign economies, increasing power and improving efficiency are the main performances pursued by equipment. In order to meet the requirements of high reliability and long life of equipment, it is bound to require bearings with high reliability, long life and high rated dynamic load to match it. Machinery with increased power must be matched with large-load bearings, and the demand for rated dynamic load is increasing. In a limited space, the pursuit of large rated dynamic load is made while keeping the main parameters of the bearing unchanged.

[0003] At present, the way to increase the load of tapered roller bearings is to increase the number of rollers and often use hollow rollers, but the production process of hollow rollers cannot be guaranteed. The Chinese invention patent (application number CN202010607750.0) discloses a stamped cage tapered roller bearing with an improved structure. The tapered roller bearing includes an outer ring, an inner ring, a cage and rolling elements. The cage includes a large diameter ring frame, a small diameter ring frame and a number of window beams connecting the large diameter ring frame and the small diameter ring frame. Window holes for accommodating rolling elements are formed between adjacent window beams. The outer ring and the inner ring are respectively provided with an outer ring raceway and an inner ring raceway at the contact position with the outer peripheral surface of the rolling body. By moving the cage outward, that is, increasing the diameter of the cage, the cage is close to the outer ring raceway and away from the center position of the bearing, thereby increasing the number of rolling elements, improving the rated dynamic load and meeting the service life of the bearing while keeping the width of the window beam unchanged.

[0004] However, increasing the diameter of the cage can easily reduce the structural strength of the cage and cause the cage to deform easily. When the cage is close to the outer ring raceway, the large diameter ring frame is likely to come into contact with the outer ring, interfering with the operation of the cage. Therefore, it is necessary to design a closing device to close the large diameter ring frame of the cage to prevent the large diameter ring frame of the cage from interfering with the outer ring. Utility Model Content

[0005] In view of the above-mentioned deficiencies, the utility model provides a tapered roller bearing retainer closing device, in which the upper mold moves toward the lower mold so that the closing surface on the inner side of the closing die is squeezed against the large-diameter ring frame of the retainer, thereby realizing the closing processing of the retainer, and the closing processing efficiency is high and the closing effect is good.

[0006] The utility model is realized by the following technical solutions:

[0007] A tapered roller bearing retainer closing device, the machine tool has a machine tool worktable and a vertically movable machine tool slider, the closing device includes a lower mold and an upper mold. The lower mold includes a lower mold plate, a punch joint and a stretching punch, the lower mold plate is installed on the machine tool worktable, the punch joint can be detachably fixed between the stretching punch and the lower mold plate, the top of the stretching punch has a conical bearing surface that matches the inner wall of the retainer; the upper mold is annular and located directly above the lower mold, the upper mold includes an upper mold plate, a stripping pad, a stripping plate and a closing die, the upper mold plate is installed on the machine tool slider, the stripping pad can be detachably fixed between the stripping plate and the upper mold plate, the closing die is annular and fixed to the upper mold plate, the closing die has a conical extrusion surface that matches the outer wall of the retainer, a closing surface is formed below the conical extrusion surface, the closing surface can extrude a large-diameter ring frame toward the center of the retainer, and the closing treatment of the retainer is realized, the treatment efficiency is high and the closing effect of the retainer is good.

[0008] Furthermore, a guide camber surface is provided below the closing surface, and the conical extrusion surface, the closing surface and the guide camber surface are smoothly transitionally connected, so that the retaining frame can smoothly enter the interior of the closing die.

[0009] Furthermore, the surfaces of the conical extrusion surface, the closing surface and the guide camber surface are coated with Teflon coating, which can reduce the surface friction coefficient of the conical extrusion surface, the closing surface and the guide camber surface, and reduce the closing resistance to the retainer.

[0010] Furthermore, a closing hoop ring is installed on the outer side of the closing die, and the closing hoop ring is sleeved to the outer wall of the closing die to reinforce the closing die.

[0011] Furthermore, the retainer has a formed state and an unformed state. When the retainer is in the formed state, the retainer includes a large diameter ring frame, a small diameter ring frame, and a plurality of window beams connecting the large diameter ring frame and the small diameter ring frame, and a window hole for accommodating the rolling body is formed between adjacent window beams; when the retainer is in the unformed state, the retainer also includes a circular bottom plate, and the small diameter ring frame and the circular bottom plate constitute the bowl bottom of the retainer, and a center hole is opened on the circular bottom plate. The closing device can perform closing processing operations on both the formed retainer and the unformed retainer.

[0012] Furthermore, when the closing device processes the retaining frame in an unformed state, a center column is fixed on the stretching punch, and the diameter of the center column is the same as the diameter of the center hole, so as to realize the positioning of the unformed retaining frame.

[0013] Furthermore, an external thread is provided above the center column, and the lower mold also includes a pressure plate, a threaded hole matching the external thread is provided on the inner side of the pressure plate, and the pressure plate has an extrusion surface that is extruded to the bottom of the bowl of the retaining frame to clamp and fix the retaining frame to the top of the stretching punch, thereby improving the stability of the retaining frame when the retaining frame is closed.

[0014] Furthermore, a mutually connected material withdrawal groove is provided between the material withdrawal pad and the material withdrawal plate, a material withdrawal cylinder is installed in the material withdrawal groove, and the material withdrawal cylinder includes a cylinder body and a push rod, the cylinder body is fixed to the material withdrawal pad, and the push rod is installed to the material withdrawal plate. The cylinder body pushes out the push rod to separate the material withdrawal plate from the material withdrawal pad, and the material withdrawal plate pushes the retainer to enable the retainer to be separated from the clamping of the closing die.

[0015] Furthermore, a plurality of mounting holes are provided on the lower template and the upper template, so as to facilitate the installation of the closing device to the machine tool.

[0016] Furthermore, the lower template and the stretching punch are connected to the punch joint through bolts, and the closing die is connected to the upper template through bolts.

[0017] Beneficial effects of the utility model:

[0018] 1. The upper mold moves toward the lower mold so that the closing face of the inner side of the closing die is squeezed against the large diameter ring frame of the cage to achieve the closing treatment of the cage. The closing treatment efficiency is high and the closing effect is good;

[0019] 2. The cage formed by the closing device can reduce the interference between the cage and the outer ring, facilitate the outward movement of the cage in the bearing, and increase the rated load of the bearing. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A connection diagram for illustrating a schematic implementation of a tapered roller bearing cage closing device in the utility model;

[0021] Figure 2 A structural schematic diagram for illustrating a schematic implementation of a tapered roller bearing cage closing device in the utility model;

[0022] Figure 3 A cross-sectional view for illustrating a schematic implementation of a tapered roller bearing cage closing device in the utility model;

[0023] Figure 4 To illustrate Figure 3 A partial enlarged schematic diagram in the middle;

[0024] Figure 5 A cross-sectional view for illustrating another schematic implementation of a tapered roller bearing cage closing device in the utility model;

[0025] Figure 6 To illustrate Figure 5 A partial enlarged schematic diagram of point B in the middle;

[0026] Figure 7A schematic structural diagram for illustrating a schematic implementation of a retainer in the utility model;

[0027] Figure 8 A cross-sectional view for illustrating a schematic embodiment of the retainer in the utility model;

[0028] Fig. 9 To illustrate Figure 8 A partial enlarged schematic diagram of point C in the middle;

[0029] Fig.10 A structural schematic diagram for illustrating an illustrative implementation of the present invention in which the retaining frame is in an unformed state.

[0030] List of parts and reference numerals:

[0031] 1. Lower mold; 11. Lower template; 12. Punch joint; 13. Stretching punch; 131. Conical bearing surface; 14. Center column; 15. Press plate; 2. Upper mold; 21. Upper template; 22. Material return pad; 23. Material return plate; 24. Closing die; 241. Conical extrusion surface; 242. Closing surface; 243. Guide arc surface; 25. Closing hoop ring; 26. Material return groove; 27. Mounting hole; 28. Material return cylinder; 281. Cylinder body; 282. Push rod; 3. Cage; 31. Large diameter ring frame; 32. Small diameter ring frame; 33. Window beam; 34. Window hole; 35. Bowl bottom; 351. Center hole. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0033] It should be noted that the directional terms such as left, right, up, down, front and back in the embodiments of the present invention are merely relative concepts or are based on the normal use state of the product, that is, the direction of movement of the product, and should not be considered as limiting.

[0034] In addition, it should be noted that the dynamic terms such as "relative motion" mentioned in the embodiments of the present invention are not only changes in position, but also include movements such as rotation and rolling where there is no relative change in position but a change in state.

[0035] Finally, it should be noted that when a component is referred to as being "located" or "set on" another component, it can be on the other component or there can be an intermediate component at the same time. When a component is referred to as being "connected to" another component, it can be directly connected to the other component or there can be an intermediate component at the same time.

[0036] like Figures 1 to 6 The present invention shows a tapered roller bearing retainer closing device, wherein the machine tool has a machine tool worktable and a vertically movable machine tool slide, and the closing device comprises a lower die 1 and an upper die 2. The lower die 1 comprises a lower die plate 11, a punch joint 12 and a stretching punch 13, the lower die plate 11 is mounted on the machine tool worktable, the punch joint 12 is detachably fixed between the stretching punch 13 and the lower die plate 11, and the top of the stretching punch 13 has a conical bearing surface 131 that matches the inner wall of the retainer 3; the upper die 2 is annular and is located directly above the lower die 1, and the upper die 2 comprises an upper die plate 21, a stripping pad 22, a stripping plate 23 and a closing die 24, and the upper die plate 21 is mounted To the machine tool slider, the stripping pad 22 can be detachably fixed between the stripping plate 23 and the upper template 21, the closing die 24 is annular and fixed to the upper template 21, and the closing die 24 has a conical extrusion surface 241 that cooperates with the outer wall of the retaining frame 3, and a closing surface 242 is formed below the conical extrusion surface 241. The closing surface 242 can extrude the large diameter ring frame 31 toward the center of the retaining frame 3 to achieve a closing process for the retaining frame 3, with high processing efficiency and good closing effect on the retaining frame 3.

[0037] In one embodiment, when the retaining frame 3 is closed, the closing device is first installed. When the lower mold 1 is installed, the lower template 11 is installed to the machine tool workbench, the punch joint 12 is installed to the lower template 11, and the stretching punch 13 matched with the retaining frame 3 is installed to the punch joint 12 from bottom to top; when the upper mold 2 is installed, the upper template 21 is installed to the machine tool slide from top to bottom, the stripping pad 22 is installed to the upper template 21, and the stripping plate 23 matched with the retaining frame 3 is installed to the stripping pad 22, and then the closing die 24 is installed on the outer side of the stripping pad 22 and the stripping plate 23, and the closing die 24 is fixed to the upper template 21.

[0038] Secondly, the retainer 3 is installed, and the retainer 3 is buckled upside down above the stretching punch 13, so that the inner wall of the retainer 3 abuts against the tapered bearing surface 131 of the stretching punch 13. Finally, the machine tool is started, and the machine tool slider moves vertically downward, so that the retainer 3 installed above the stretching punch 13 enters the inner side of the closing die 24. As the upper mold 2 moves downward, the closing surface 242 of the closing die 24 abuts against the large diameter ring frame 31 of the retainer 3. The upper mold 2 continues to move downward, and the closing surface 242 of the closing die 24 presses the large diameter ring frame 31 toward the center of the retainer 3 until the outer wall of the large diameter ring frame 31 fits with the closing surface 242. At this time, the outer wall of the retainer 3 also fits with the tapered extrusion surface 241, and the closing operation of the retainer 3 is completed. The machine tool slider moves vertically upward to separate the upper mold 2 and the lower mold 1, and the retainer 3 with the completed closing is taken out, waiting for the closing operation of the next retainer 3. It should be noted that the machine tool worktable and the machine tool slide block of the machine tool are both existing technologies. The machine tool is used as a power mechanism to drive the upper mold 2 and the lower mold 1 to move relative to each other, and the specific structure of the machine tool is not described in detail.

[0039] Preferably, a guide arc surface 243 is provided below the closing surface 242 , and the conical extrusion surface 241 , the closing surface 242 and the guide arc surface 243 are smoothly transitionally connected so that the retainer 3 can smoothly enter the interior of the closing die 24 .

[0040] In one embodiment, during the production process, the size of the retainer 3 is deviated, and the position of the retainer 3 placed on the stretching punch 13 is also deviated, which easily makes it impossible for the closing die 24 to be aligned with the retainer 3, and easily causes damage to the workpiece of the retainer 3. The device arranges a guide arc surface 243 below the closing surface 242, and the diameter of the cross section where the guide arc surface 243 is located gradually increases in the vertical downward direction, that is, the guide arc surface 243 is in an upward gathering form, so that the retainer 3 can smoothly enter the interior of the closing die 24.

[0041] Preferably, the surfaces of the conical extrusion surface 241, the closing surface 242 and the guide arc surface 243 are coated with Teflon coating. The Teflon coating can reduce the surface friction coefficient of the conical extrusion surface 241, the closing surface 242 and the guide arc surface 243, and reduce the closing resistance to the retainer 3.

[0042] Preferably, a closing hoop ring 25 is installed on the outer side of the closing die 24 , and the closing hoop ring 25 is sleeved onto the outer wall of the closing die 24 to reinforce the closing die 24 .

[0043] Preferably, Figures 7 to 10As shown, the retainer 3 has a formed state and an unformed state. When the retainer 3 is in the formed state, the retainer 3 includes a large diameter ring frame 31, a small diameter ring frame 32, and a plurality of window beams 33 connecting the large diameter ring frame 31 and the small diameter ring frame 32, and a window hole 34 for accommodating a rolling body is formed between adjacent window beams 33; when the retainer 3 is in the unformed state, the retainer 3 also includes a circular bottom plate, and the small diameter ring frame 32 and the circular bottom plate constitute a bowl bottom 35 of the retainer 3, and a center hole 351 is opened on the circular bottom plate. The closing device can perform closing processing operations on both the formed retainer 3 and the unformed retainer 3, thereby increasing the application scope of the closing device.

[0044] Preferably, when the closing device processes the retaining frame 3 in an unformed state, a center column 14 is also fixed on the stretching punch 13, and the diameter of the center column 14 is the same as the diameter of the center hole 351 to achieve positioning of the unformed retaining frame 3.

[0045] In one embodiment, when the retaining frame 3 is installed on the stretching punch 13, the center hole 351 of the bowl bottom 35 of the retaining frame 3 is sleeved onto the center column 14. Since the diameter of the center column 14 is the same as the diameter of the center hole 351, the center column 14 plays a positioning role for the retaining frame 3.

[0046] Preferably, the center column 14 has an external thread on the top, and the lower mold 1 also includes a pressure plate 15, the inner side of the pressure plate 15 is provided with a threaded hole that cooperates with the external thread, and the pressure plate 15 has an extrusion surface that is extruded to the bowl bottom 35 of the retaining frame 3, so as to clamp and fix the retaining frame 3 to the top of the stretching punch 13, thereby improving the stability of the retaining frame 3 when the retaining frame 3 is closed.

[0047] In one embodiment, after the closing operation of the retainer 3 is completed, the upper mold 2 is separated from the lower mold 1. Since the closing surface 242 of the closing die 24 squeezes the large diameter ring frame 31 of the retainer 3 to close the retainer 3, after the upper mold 2 is separated from the lower mold 1, the retainer 3 is clamped inside the closing die 24. When the clamping is tight, it is difficult to remove the retainer 3. Therefore, a pressing plate 15 is installed above the center column 14. The pressing plate 15 has an extrusion effect on the retainer 3 with the bowl bottom 35. When the upper mold 2 is separated from the lower mold 1, the retainer 3 is fixed to the stretching punch 13 under the extrusion of the pressing plate 15, which effectively prevents the retainer 3 from being clamped to the inner side of the closing die 24.

[0048] Preferably, a mutually connected material stripping groove 26 is provided between the material stripping pad 22 and the material stripping plate 23, and a material stripping cylinder 28 is installed in the material stripping groove 26. The material stripping cylinder 28 includes a cylinder body 281 and a push rod 282. The cylinder body 281 is fixed to the material stripping pad 22, and the push rod 282 is installed to the material stripping plate 23. The cylinder body 281 pushes out the push rod 282 to separate the material stripping plate 23 from the material stripping pad 22, and the material stripping plate 23 pushes the retainer 3 to enable the retainer 3 to be released from the clamping of the closing die 24.

[0049] In one embodiment, after the closing operation of the retaining frame 3 is completed, if the retaining frame 3 is clamped to the inner side of the closing die 24, the material return cylinder 28 can be wirelessly controlled, and the material return cylinder 28 generates a thrust on the material return plate 23, so that the material return plate 23 pushes the retaining frame 3 downward, thereby realizing the extraction of the retaining frame 3 in the closing die 24.

[0050] Preferably, a plurality of mounting holes 27 are provided on the lower template 11 and the upper template 21 to facilitate mounting the closing device on the machine tool.

[0051] Preferably, the lower mold plate 11 and the stretching punch 13 are connected to the punch joint 12 by bolts, and the closing die 24 is connected to the upper mold plate 21 by bolts.

[0052] When the above-mentioned tapered roller bearing retainer closing device is used, the upper mold 2 moves toward the lower mold 1 so that the closing surface 242 on the inner side of the closing die 24 squeezes the large diameter ring frame 31 of the retainer 3 to achieve a closing process on the retainer 3 with high closing efficiency and good closing effect.

[0053] The above is only an embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.

Claims

1. A tapered roller bearing retainer closing device, a machine tool having a machine tool worktable and a vertically movable machine tool slide, characterized in that: The closing device comprises: A lower mold, the lower mold comprising a lower mold plate, a punch joint and a stretching punch, the lower mold plate is mounted on a machine tool worktable, the punch joint is detachably fixed between the stretching punch and the lower mold plate, and the top of the stretching punch has a tapered bearing surface that matches the inner wall of the retainer; The upper mold is annular and located directly above the lower mold. The upper mold includes an upper mold plate, a stripping pad, a stripping plate and a closing die. The upper mold plate is installed on a machine tool slide. The stripping pad is detachably fixed between the stripping plate and the upper mold plate. The closing die is annular and fixed to the upper mold plate. The closing die has a conical extrusion surface that cooperates with the outer wall of the retaining frame. A closing surface is formed below the conical extrusion surface, and the closing surface can extrude the large diameter ring frame toward the center of the retaining frame.

2. A tapered roller bearing cage closing device according to claim 1, characterized in that: A guide camber surface is provided below the closing surface, and the conical extrusion surface, the closing surface and the guide camber surface are smoothly transitionally connected.

3. A tapered roller bearing cage closing device according to claim 2, characterized in that: The surfaces of the conical extrusion surface, the closing surface and the guide curved surface are coated with Teflon coating.

4. The tapered roller bearing cage closing device according to claim 1, characterized in that: A closing hoop ring is installed on the outer side of the closing die, and the closing hoop ring is sleeved to the outer wall of the closing die.

5. The tapered roller bearing cage closing device according to claim 1, characterized in that: The retainer has a formed state and an unformed state. When the retainer is in the formed state, the retainer includes a large-diameter ring frame, a small-diameter ring frame, and a plurality of window beams connecting the large-diameter ring frame and the small-diameter ring frame, and window holes for accommodating rolling bodies are formed between adjacent window beams; When the retainer is in an unformed state, the retainer further comprises a circular bottom plate, the small-diameter ring frame and the circular bottom plate constitute the bowl bottom of the retainer, and a center hole is opened on the circular bottom plate.

6. A tapered roller bearing cage closing device according to claim 5, characterized in that: When the closing device processes the retaining frame in an unformed state, a center column is also fixed on the stretching punch, and the diameter of the center column is the same as the diameter of the center hole.

7. A tapered roller bearing cage closing device according to claim 6, characterized in that: The center column is provided with an external thread on its upper side, and the lower mold further comprises a pressing plate, a threaded hole matching with the external thread is provided on the inner side of the pressing plate, and the pressing plate has an extrusion surface which is extruded to the bottom of the bowl of the retaining frame.

8. The tapered roller bearing cage closing device according to claim 1, characterized in that: A mutually connected material withdrawal groove is provided between the material withdrawal pad and the material withdrawal plate, a material withdrawal cylinder is installed in the material withdrawal groove, the material withdrawal cylinder comprises a cylinder body and a push rod, the cylinder body is fixed to the material withdrawal pad, and the push rod is installed to the material withdrawal plate.

9. The tapered roller bearing cage closing device according to claim 1, characterized in that: The lower template and the upper template are both provided with a plurality of mounting holes.

10. The tapered roller bearing cage closing device according to claim 1, characterized in that: The lower template and the stretching punch are both connected to the punch joint via bolts, and the closing die is connected to the upper template via bolts.

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