Split stamping retainer, bearing and assembling method thereof

Abstract

The invention relates to the technical field of cylindrical roller bearings, in particular to a split type stamping retainer, a bearing and an assembling method of the split type stamping retainer, the split type stamping retainer comprises two half retainer assemblies which are assembled together, and each half retainer assembly comprises two half stamping retainers; the semi-stamping retainer comprises a semi-ring, a plurality of inner locking plates arranged on one side of the inner diameter of the semi-ring and a plurality of outer locking plates arranged on one side of the outer diameter of the semi-ring, and the inner locking plates correspond to the outer locking plates in the radial direction of the semi-ring; the inner locking plate comprises a first locking part and a second locking part which are mutually staggered in the radial direction of the semi-ring, the two semi-stamping retainers are in butt joint in the axial direction, and the second locking part of one semi-stamping retainer and the second locking part of the other semi-stamping retainer are overlapped and connected in the radial direction of the semi-ring. The stamping retainer occupies a small space between the inner ring and the outer ring of the bearing, and the stamping retainer is large in internal space, convenient to lubricate, easy to process and low in cost.

Description

Technical Field

[0001] The present invention relates to the technical field of cylindrical roller bearings, and particularly to a split stamping cage, a bearing and an assembly method thereof. Background Art

[0002] Cylindrical roller bearings are mainly applied to occasions such as medium and large motors, locomotives and rolling stock, etc. Because of their strong radial load-bearing capacity and small friction coefficient, they are particularly suitable for occasions that need to bear large radial loads. When facing application scenarios with a small installation space and a high limiting speed, the existing cylindrical roller bearings cannot meet the usage requirements. Summary of the Invention

[0003] In view of the defects of the prior art, the present invention provides a split stamping cage, a bearing and an assembly method thereof, which can be applied to working conditions with a small installation space and a high limiting speed, and has the advantages of being structurally compact, easy to install, light in weight and high in reliability.

[0004] To achieve the above object, the technical solution provided by the present invention is a split stamping cage, which includes two half-cage components assembled together. The half-cage component includes two half stamping cages. The half stamping cage includes a half-ring, a plurality of inner locking plates arranged on the inner diameter side of the half-ring, and a plurality of outer locking plates arranged on the outer diameter side of the half-ring. The inner locking plates and the outer locking plates are corresponding in position in the radial direction of the half-ring; The inner locking plate includes a first locking portion and a second locking portion that are mutually offset in the radial direction of the half-ring. The two half stamping cages are butted along the axial direction, and the second locking portion of one half stamping cage overlaps and is connected with the second locking portion of the other half stamping cage in the radial direction of the half-ring.

[0005] Further, one end of the half-ring is provided with a connecting convex portion, the connecting convex portion is provided with a locking point, and the other end of the half-ring is provided with a locking hole.

[0006] Further, the outer diameter of the connecting convex portion is smaller than the outer diameter of the half-ring, and the inner diameter of the connecting convex portion is larger than the inner diameter of the half-ring.

[0007] Further, two inner locking plates are respectively arranged close to both ends of the half-ring, and a plurality of inner locking plates are evenly distributed on the inner diameter side of the half-ring.

[0008] Further, two outer locking plates are respectively arranged close to both ends of the half-ring, and a plurality of outer locking plates are evenly distributed on the outer diameter side of the half-ring.

[0009] Further, the sizes of the inner locking plates and the outer locking plates are determined according to the roller diameter.

[0010] A bearing, which includes the above-mentioned split stamping cage.

[0011] An assembly method of the bearing as described above, the specific steps thereof include Step S100: Rivet two half-stamped cages together to form a half-cage assembly; Step S200: Press the rollers into the half-cage assembly through the outer diameter of the half-cage assembly to form a half-cage assembly with rollers installed; Step S300: Repeat Step S100 and Step S200 to assemble another half-cage assembly with rollers installed; Step S400: Assemble the two half-cage assemblies with rollers installed together.

[0012] Furthermore, in Step S100, the riveting is carried out by using a riveting tooling. The riveting tooling includes a ring, a lifting assembly and a riveting module. The ring is arranged between the half-rings of the two half-stamped cages, and the inner diameter surface of the ring is in fit with the outer side surface of the inner locking plate. The lifting assembly includes a bracket and a lifting driving device fixed on the bracket. The riveting module includes a module body arranged at the output end of the lifting driving device, a plurality of telescopic rods slidably and telescopically arranged in the module body, a telescopic driving device connected to one end of the telescopic rod, and a riveting head connected to the other end of the telescopic rod. The telescopic driving device drives the telescopic rod and the riveting head to move along the radial direction of the ring, and provides a riveting force at the position where the two inner locking plates overlap on the inner side of the inner locking plate.

[0013] Furthermore, a groove is formed on the end face of the ring, and the groove is used for accommodating the connecting convex part.

[0014] Furthermore, Step S100 includes the step of manufacturing the half-stamped cage. The steel plate is stamped and preliminarily bent and formed to bend out a half-ring, a bent part on the inner side of the half-ring, and a bent part on the outer side of the half-ring. The outer locking points of the cage outer diameter are stamped and formed on the bent part on the outer side of the half-ring to manufacture a plurality of outer locking plates. The inner locking points of the cage inner diameter are stamped and formed on the bent part on the inner side of the half-ring to manufacture a plurality of inner locking plates. Then, the locking points and locking holes for the installation and fit at the connection of the half-stamped cage are processed.

[0015] The beneficial effects of the present invention: It adopts a lightweight and compact design. The stamped cage occupies a small space between the inner and outer rings of the bearing. The internal space of the stamped cage is large, which is convenient for lubrication, easy to process and has a low cost. Description of the Drawings

[0016] Figure 1 It is a schematic structural diagram of a split-type stamped cage in an embodiment of the present invention; Figure 2 It is a schematic structural diagram of one of the half-stamped cages in an embodiment of the present invention; Figure 3 Schematic structural diagram of another half stamping cage in an embodiment of the present invention; Figure 4 Schematic structural diagram of one of the half cage assemblies in an embodiment of the present invention; Figure 5 Schematic structural diagram of another half cage assembly in an embodiment of the present invention; Figure 6 Schematic structural diagram of a bearing in an embodiment of the present invention; Figure 7 Schematic structural diagram of one of the half cage assemblies with rollers in an embodiment of the present invention; Figure 8 Schematic structural diagram of another half cage assembly with rollers in an embodiment of the present invention; Figure 9 Schematic structural diagram of a split stamping cage with rollers in an embodiment of the present invention; Figure 10 Schematic structural diagram of a riveting tooling in an embodiment of the present invention; Figure 11 in Figure 4 Schematic structural diagram of part A; Figure 12 Schematic structural diagram of a circular ring in an embodiment of the present invention; Figure 13 Schematic structural diagram of a riveting module in an embodiment of the present invention; Figure 14 Usage state diagram of the riveting tooling in an embodiment of the present invention; Figure 15 Top view of the riveting tooling in an embodiment of the present invention; Figure 16 is Figure 15 Cross-sectional view taken along C-C in; Figure 17 Schematic diagram of the steel plate raw material for manufacturing the split stamping cage; Figure 18 Schematic diagram of the steel plate being bent and formed; Figure 19 Schematic diagram of the outer diameter locking point being stamped and formed; Figure 20 Schematic diagram of the inner diameter pocket hole and locking point being stamped and formed; In the figure: 100. Half cage assembly, 110. Half stamping cage, 111. Half ring, 1111. Connecting convex part, 1112. Locking point, 1113. Locking hole, 112. Inner locking plate, 1121. First locking part, 1122. Second locking part, 113. Outer locking plate, 200. Roller, 10. Ring, 11. Inner diameter surface, 12. End face, 13. Groove 20. Lifting assembly, 21. Bracket, 22. Fixed frame, 23. Guide sleeve, 24. Lifting drive device 30. Riveting module, 31. Module body, 32. Telescopic rod, 33. Telescopic drive device, 34. Riveting head Detailed implementation manners

[0017] To make the above objects, features, and advantages of the present invention more apparent and understandable, the following detailed description of the specific implementation manners of the present invention will be given in conjunction with the accompanying drawings. Many specific details are set forth in the following description to fully understand the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed below.

[0018] See Figures 1 - 3 , which shows a split stamping cage, which includes two half cage assemblies 100 assembled together. The half cage assembly 100 includes two half stamping cages 110. The half stamping cage 110 includes a half ring 111, a plurality of inner locking plates 112 provided on the inner diameter side of the half ring 111, and a plurality of outer locking plates 113 provided on the outer diameter side of the half ring 111. The inner locking plates 112 and the outer locking plates 113 are corresponding in position in the radial direction of the half ring 111; the inner locking plate 112 includes a first locking portion 1121 and a second locking portion 1122 that are offset from each other in the radial direction of the half ring 111. The two half stamping cages 110 are butted along the axial direction, and the second locking portion 1122 of one half stamping cage 110 overlaps and is connected to the second locking portion 1122 of the other half stamping cage 110 in the radial direction of the half ring 111. Specifically, see Figure 5 , in this embodiment, the second locking portion 1122 of one of the two half stamping cages 110 is closer to the center of the half ring 111 than the first locking portion 1121, that is, it is offset inward in the radial direction; the second locking portion 1122 of the other half stamping cage 110 is farther from the center of the half ring 111 than the first locking portion 1121, that is, it is offset outward in the radial direction. Specifically, in this embodiment, the connection method of the two second locking portions 1122 is riveting, that is, two pieces of plates are struck with an external force to make the two pieces of plates fit together. In addition to the riveting method in this embodiment, a rivet connection method can also be used for connection, that is, holes are drilled in the second locking portion 1122, then rivets are inserted into the holes, and finally the rivets are press-riveted by a special riveting tool to make them deformed and fill the pores, so as to achieve a firm connection.

[0019] The above split stamping cage is formed by connecting two half cage components 100. Each half cage component 100 includes two half stamping cages 110 riveted together. Compared with the ordinary cage that forms pocket holes with solid beams and columns, the above split stamping cage is provided with multiple inner locking plates 112 and outer locking plates 113 separately, and there is a hollow space between the inner locking plate 112 and the outer locking plate 113. It can not only lock the rolling elements from both the inner and outer sides, but also reduce the overall weight of the cage. In addition, after the two half stamping cages 110 are riveted, the second locking parts 1122 of the outer locking plate 113 overlap radially, and only the cage locking points are strengthened in the middle of the roller 200. It can not only ensure the accommodation of the roller 200, but also further reduce the overall weight of the cage. In summary, the split stamping cage adopts a lightweight and compact design, occupies a small space between the inner and outer rings of the bearing, has a large internal space in the stamping cage, is convenient for lubrication, easy to process and has a low cost.

[0020] The half cage component 100 is provided with an outer locking plate 113, and the outer locking plate 113 provides an outer diameter locking point. And the half cage component 100 is provided with an inner locking plate 112, and the inner locking plate 112 provides an inner diameter locking point, which can effectively prevent the roller 200 from falling out from the outer diameter or the inner diameter, and realizes that in the natural state, the roller is not clamped. Compared with the cage structure provided with hole beams, it is more lightweight and compact. At the non-locking point connection position at the inner diameter of the pocket hole, it is only necessary to ensure that it can be riveted and installed, and the position does not need to be particularly large, reducing the weight and meeting the use requirements; the locking point size is determined according to the roller diameter. The diameter size at the locking point is generally smaller than the roller diameter, and the size can refer to about 98% of the roller diameter, and can be fine-tuned according to the actual application conditions.

[0021] In one embodiment, one end of the half ring 111 is provided with a connecting convex portion 1111, the connecting convex portion 1111 is provided with a locking point 1112, and the other end of the half ring 111 is provided with a locking hole 1113. The half cage component 100 is designed in a male-female mating form, with a half end face protruding on one side and protruding locking points 1112 on the outer sides of both ends; the other side is designed as a female mating, and round holes are designed at both ends as locking holes 1113 for mating with the locking points 1112; during assembly, the connecting convex portion 1111 of one half cage component 100 is inserted into the inner side of the half ring 111 of the other half cage component 100, and the protruding locking point 1112 is mated with the locking hole 1113, and then the locking point 1112 just snaps into the locking hole 1113.

[0022] In one embodiment, the outer diameter of the connecting convex portion 1111 is smaller than the outer diameter of the half ring 111, and the inner diameter of the connecting convex portion 1111 is larger than the inner diameter of the half ring 111.

[0023] The two sides of the semi-cage assembly 100 are asymmetric. When the two semi-stamped cages 110 are connected, it is ensured that the male-female fits for connection are respectively distributed in the two semi-cage assemblies 100. Additionally, to ensure safe and reliable connection, when disassembling, press inward on the connection convex part 1111 of the semi-cage assembly 100 and pull outward to disassemble, which is convenient for assembly and disassembly.

[0024] In one embodiment, two inner locking plates 112 are respectively arranged close to both ends of the semi-ring 111, and multiple inner locking plates 112 are evenly distributed on one side of the inner diameter of the semi-ring 111.

[0025] In one embodiment, two outer locking plates 113 are respectively arranged close to both ends of the semi-ring 111, and multiple outer locking plates 113 are evenly distributed on one side of the outer diameter of the semi-ring 111.

[0026] In one embodiment, the sizes of the inner locking plates 112 and the outer locking plates 113 are determined according to the roller diameter.

[0027] As Figure 6 shown, a bearing includes the above-mentioned split-type stamped cage.

[0028] Refer to Figures 7 - 9 , the present invention also provides an assembly method for a bearing as described above, and its specific steps include Step S100: Rivet the two semi-stamped cages 110 together to form a semi-cage assembly 100, as Figure 4 shown.

[0029] Step S200: Press the rollers 200 through the outer diameter of the semi-cage assembly 100 to form a semi-cage assembly 100 with the rollers 200 installed, as Figure 7 shown; Step S300: Repeat Step S100 and Step S200 to assemble another semi-cage assembly 100 with the rollers 200 installed, as Figure 5 and Figure 8 shown; Step S400: Assemble the two semi-cage assemblies 100 with the rollers 200 installed through mating, as Figure 9 shown.

[0030] Refer to Figures 17 - 20 , in the above two bearing assembly methods, in Step S100, it is necessary to first manufacture the semi-stamped cage 110. The raw material for the stamped cage is a steel plate, and steel plates with different thicknesses are selected according to different designs. First, according to the forms of the two different semi-stamped cages, the steel plate is stamped into the form as Figure 17 shown, and the steel plate is preliminarily bent and formed according to the sizes and structural forms of the two different semi-stamped cages, bending out a semi-ring, an inner bending part of the semi-ring, and an outer bending part of the semi-ring (asFigure 18 as shown), and then perform stamping forming on the outer diameter locking points of the cage (such as Figure 19 as shown) to make multiple outer locking plates. Secondly, process the pocket size at the inner diameter of the cage (such as Figure 20 as shown) to make multiple inner locking plates. Then, process the locking points and locking holes for the installation and fitting at the connection of the semi-stamped cage. The above semi-stamped cage 110 is easy to process and has a low cost.

[0031] In addition, referring to Figures 10 - 16 , it should be noted that in step S100 of the above two bearing assembly methods, riveting is performed using a riveting tooling. The riveting tooling includes a ring 10, a lifting assembly 20, and a riveting module 30; the riveting module 30 is arranged on the lifting assembly 20, and the lifting assembly 20 drives the riveting module 30 to lift and lower. The ring 10 is independently arranged from the riveting module 30 and the lifting assembly 20 and cooperates with the two semi-stamped cages 110 to be assembled.

[0032] Referring to Figure 10 and Figure 11 , specifically, the lifting assembly 20 includes a bracket 21 and a lifting drive device 24 fixed on the bracket 21; in a specific embodiment, the lifting drive device 24 is a first hydraulic cylinder. The riveting module 30 includes a module body 31 arranged at the output end of the lifting drive device 33, a plurality of telescopic rods 32 slidably and telescopically arranged in the module body 31, a telescopic drive device 33 connected to one end of the telescopic rod 32, and a riveting head 34 connected to the other end of the telescopic rod 32. The telescopic drive device 33 drives the telescopic rod 32 and the riveting head 34 to move radially along the ring 10 and provides a riveting force at the position where the two inner locking plates 112 overlap on the inner side of the inner locking plate 112. The specific value of the riveting force is also different according to the different materials selected, and those skilled in the art can calculate it according to the empirical formula. In addition, in an embodiment, the telescopic drive device 33 is a second hydraulic cylinder, and all the telescopic drive devices 33 can be controlled to act synchronously through a hydraulic control system, so as to drive a plurality of riveting heads 34 to move radially synchronously, further improving the processing efficiency. The ring 10 is arranged between the semi-rings 111 of the two semi-stamped cages 110, and the inner diameter surface 11 of the ring 10 fits with the outer surface of the inner locking plate 112. Specifically, the inner diameter surface 110 will fit with the outer second locking portion 1122.

[0033] The above riveting tooling is reasonably arranged according to the special structure of the split-type stamped cage. The lifting assembly 20 is provided to drive the whole riveting module 30 to lift and lower, that is, drive a plurality of riveting heads 34 thereon to synchronously adjust the height, so as to integrally extend into the inner diameter side of the split-type stamped cage, and then use the ring 10 to cooperate with a plurality of riveting heads 34 to punch a plurality of riveting points of the split-type stamped cage, which is convenient for riveting processing, thereby improving the processing efficiency and ensuring the tightness and reliability of riveting.

[0034] See also Figure 12 and Figure 16 In one embodiment, the two semi-stamped retainers 110 are secured together by a connecting assembly. A groove 13 is defined on the end surface 12 of the ring 10 to accommodate the connecting assembly. Specifically, in one embodiment, two grooves 13 are defined on one end surface of the ring 10, oriented 180 degrees relative to each other. Specifically, the grooves 13 correspond to the positions where the locking points 1112 and the locking holes 1113 mate, leaving space for the connecting protrusions 1111.

[0035] See also Figure 10 and Figure 11 In one embodiment, the bracket 21 is connected to a fixing bracket 22, which is connected to a guide sleeve 23. The guide sleeve 23 is slidably mounted on the outside of the module body 31. With this arrangement, when the lifting drive 24 drives the module body 31 up and down, the guide sleeve 23 can guide the module body 31 to prevent deviation.

[0036] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0037] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0038] In the present invention, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediate medium; internal communication between two components, or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0039] In the present invention, unless otherwise clearly specified or limited, the first feature being "on" or "under" the second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "beneath" and "underneath" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the horizontal height of the first feature is less than that of the second feature. It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or there may also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation.

Claims

1. Split type stamping cage, characterized in that: Comprising two half-cage components assembled together, and the half-cage components include two half-stamped cages. The half-stamped cage includes a half-ring, a plurality of inner locking plates arranged on the inner diameter side of the half-ring, and a plurality of outer locking plates arranged on the outer diameter side of the half-ring. The inner locking plates and the outer locking plates are corresponding in position in the radial direction of the half-ring. The inner locking plate includes a first locking portion and a second locking portion that are mutually offset in the radial direction of the half-ring. The two half-stamped cages are butt-jointed along the axial direction, and the second locking portion of one half-stamped cage overlaps and is connected with the second locking portion of the other half-stamped cage in the radial direction of the half-ring.

2. The split stamping cage according to claim 1, wherein: One end of the half-ring is provided with a connecting convex portion, the connecting convex portion is provided with a locking point, and the other end of the half-ring is provided with a locking hole.

3. The split stamping cage according to claim 2, characterized in that: The outer diameter of the connecting convex portion is smaller than the outer diameter of the half-ring, and the inner diameter of the connecting convex portion is larger than the inner diameter of the half-ring.

4. The split stamping cage according to claim 1, wherein: Two inner locking plates are respectively arranged close to both ends of the half-ring, and a plurality of inner locking plates are evenly distributed on the inner diameter side of the half-ring; two outer locking plates are respectively arranged close to both ends of the half-ring, and a plurality of outer locking plates are evenly distributed on the outer diameter side of the half-ring.

5. The split stamping cage according to any one of claims 1-4, characterized in that: The sizes of the inner locking plates and the outer locking plates are determined according to the roller diameter.

6. Bearing, characterized in that: Comprising a split-type stamped cage according to any one of claims 1-4.

7. The assembling method of the bearing according to claim 6, characterized in that: The specific steps include Step S100: Rivet the two half-stamped cages together to form a half-cage component. Step S200: Press the rollers into the half-cage component through the outer diameter of the half-cage component to form a half-cage component with rollers installed. Step S300: Repeat Step S100 and Step S200 to assemble another half-cage component with rollers installed. Step S400: Assemble the two half-cage components with rollers installed together.

8. The assembling method of the bearing according to claim 7, characterized in that: In Step S100, the riveting is carried out by using a riveting tooling. The riveting tooling includes a circular ring, a lifting component and a riveting module. The circular ring is arranged between the half-rings of the two half-stamped cages, and the inner diameter surface of the circular ring is fitted with the outer side surface of the inner locking plate. The lifting component includes a bracket and a lifting driving device fixed on the bracket. The riveting module includes a module body arranged at the output end of the lifting driving device, a plurality of telescopic rods slidably and telescopically arranged in the module body, a telescopic driving device connected to one end of the telescopic rod, and a riveting head connected to the other end of the telescopic rod. The telescopic driving device drives the telescopic rod and the riveting head to move along the radial direction of the circular ring, and provides a riveting force at the position where the two inner locking plates overlap on the inner side of the inner locking plate.

9. The assembling method of the bearing according to claim 8, characterized in that: The end face of the circular ring is provided with a groove for accommodating the connecting convex portion.

10. The assembling method of the bearing according to claim 7, characterized in that: Step S100 includes the step of manufacturing the half-stamped cage. The steel plate is stamped and preliminarily bent and formed to bend out a half-ring, an inner bent portion of the half-ring, and an outer bent portion of the half-ring. The outer locking points of the cage outer diameter are stamped and formed on the outer bent portion of the half-ring to make a plurality of outer locking plates. The inner locking points of the cage inner diameter are stamped and formed on the inner bent portion of the half-ring to make a plurality of inner locking plates. Then, the locking points and locking holes for installation and fitting at the connection of the half-stamped cage are processed.

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