Disc cage for tapered roller bearing

Abstract

The present application relates to disc type cage for tapered roller bearing, comprising: the whole ring type disc body is enclosed by several independent units, and the several independent units are connected by rolling mechanism; each adjacent two independent units are spliced into a half open type pocket, and each pocket corresponds to install a roller; the unique structure design, the whole is disc type form, and the whole cage is combined by several independent units; it adopts the way of radial guide of roller, can provide certain radial support, occupies small space, reduces the friction force of cage, the manufacturing difficulty is low, reduces the overall weight of cage, improves the overall energy efficiency of bearing, prolongs the service life of bearing, reduces the vibration and noise of bearing in the use process. At the same time, the reduction of cost also provides greater space for the selection of material; the design of lubricating oil hole and lubricating groove creates good conditions for the lubrication of roller, improves the stability of bearing operation.

Description

Technical Field

[0001] This invention relates to a cage structure for bearing products, specifically a disc cage for tapered roller bearings, and belongs to the field of bearing cage technology. Background Technology

[0002] Tapered roller bearing cages are generally guided by axially surrounding the rollers. Most are one-piece cages, while some are separate cages. They have high processing costs and long cycles, cannot provide radial support, and occupy a large space, making installation inconvenient in some cases, which seriously troubles bearing design and selection. Summary of the Invention

[0003] In view of the technical defects of the prior art, the purpose of this invention is to provide a disc cage for tapered roller bearings. Compared with the traditional design, this cage achieves a breakthrough and novel level. It adopts a roller radial guidance method, which can provide a certain radial support, occupies little space, is easy to manufacture, reduces the overall weight of the cage, is easy to install, and improves the overall energy efficiency of the bearing.

[0004] To achieve the above objectives, the technical solution adopted by the present invention is: a disc cage for tapered roller bearings, comprising: a whole annular disc formed by several independent units, wherein the several independent units are connected by a rolling mechanism; each pair of adjacent independent units is assembled into a semi-open pocket, and a roller is installed in each pocket accordingly;

[0005] Furthermore, the opening direction of the semi-open pocket is oriented towards the inner diameter direction of the cage;

[0006] Furthermore, the disc cage used in tapered roller bearings further includes an outer ring and an inner ring; the inner diameter of the outer ring and the outer diameter of the inner ring are respectively provided with raceways that mate with the outer circumferential surface of the rollers, and radial positioning grooves are provided on the raceways. The cage is installed in the radial positioning grooves, so that the outer diameter direction of the cage faces the outer ring raceway, and the semi-open pocket opening of the cage faces the inner ring raceway.

[0007] The outer ring is a non-flange inclined raceway, and the inner ring is a double-flange inclined raceway. The large end of the outer ring and the small end of the inner ring are in the same direction. Conversely, the small end of the outer ring and the large end of the inner ring are in the same direction.

[0008] Furthermore, the radial positioning groove is located above the center line of the roller on the outer raceway, and the radial positioning groove is used to store the cage and play a positioning role.

[0009] Furthermore, each independent unit includes: an outer edge portion and an extension portion integrally connected to the outer edge portion; the cross-sectional widths of the outer edge portion and the extension portion are the same; the entire width of the outer edge portion fits perfectly into the radial positioning groove of the outer ring raceway, such that the two side walls of the outer edge portion respectively fit with the inner side wall of the radial positioning groove, and the connecting surface between the two side walls of the outer edge portion fits with the bottom of the radial positioning groove.

[0010] Furthermore, the outer edge portion includes: two opposing side facades and an upper surface connecting the upper edges of the two side facades; a cylindrical hole is provided through both side facades for storing lubricating oil;

[0011] Furthermore, the upper surface connecting the upper edges of the two side facades is a curved surface smaller than the diameter of the radial positioning groove, and an oil hole communicating with the cylindrical hole is opened downward from the upper surface. The oil hole is used for lubrication.

[0012] In the above structure, the outer edge of the independent unit is used for positioning in the outer ring, and the extension is used to guide the movement of the roller and provide a certain support for the axial direction of the roller.

[0013] Furthermore, the extended portion is perpendicular to the roller axis and located at the center of the roller;

[0014] Furthermore, the length of the extended portion extending onto the roller is greater than three-quarters of the roller diameter and less than five-sixths of the roller diameter, which serves to support the roller without contacting the raceway, thus increasing the friction force when the roller rotates.

[0015] Furthermore, the extension portion has a front and rear planar design, with both ends being arc-shaped contact surfaces adapted to the outer periphery of the roller;

[0016] Furthermore, grooves are formed on the arc-shaped contact surface to assist lubrication; as another optimization design of this solution, lubrication can be increased by adding grooves or other similar structures to the arc-shaped contact surface.

[0017] Furthermore, in each independent unit, the surface between the two opposing side elevations of the outer edge portion is the two end faces of the outer edge portion, and the rolling mechanism is arranged between the end faces of the outer edge portion of each two adjacent independent units; the cage rotates in the radial positioning groove of the outer ring through the rolling mechanism of the outer edge portion, so that the contact between the cage and the outer ring changes from sliding friction to rolling friction, thereby reducing the friction force of the overall design.

[0018] Furthermore, the rolling mechanism adopts a steel ball rolling form, and the end face of the outer edge portion is provided with a spherical groove adapted to the steel ball, with the steel ball located in the spherical groove of the outer edge portion of two adjacent independent units;

[0019] Furthermore, the diameter of the spherical groove is slightly larger than the diameter of the steel ball, so that the steel ball can be inserted.

[0020] Furthermore, the center of the spherical groove is located at the center of the outer radial positioning groove to facilitate positioning.

[0021] When assembling the cage structure described above in the tapered roller bearing, it needs to be arranged with one cage unit and one steel ball at intervals. All cage units need to be installed using auxiliary tooling. After all cage units are placed into the outer ring, the inner ring is placed into the assembly position using spacers, and finally the rollers are installed in a certain order. During the installation of each cage unit using auxiliary tooling, the cage units are secured with cable ties at regular intervals to fix their positions and prevent them from falling off. After all rollers are installed, the cable ties are removed.

[0022] Furthermore, when installing the inner ring, the height of the inner ring is adjusted using shims;

[0023] Furthermore, the auxiliary tooling includes: a circular guide rail and multiple grippers rotatably disposed on the lower end face of the circular guide rail, wherein the grippers are rotated along the circular guide rail to clamp the retainer.

[0024] When in use, place the auxiliary tooling directly above the outer ring, with the gripper pointing downwards toward the cage independent unit;

[0025] Furthermore, the diameter of the circular guide rail is slightly smaller than the diameter of the outer raceway, so that the tooling can be inserted into the outer race of the bearing;

[0026] Furthermore, sliders are set at positions corresponding to each gripper on the lower end face of the circular guide rail, and the grippers are fixed on the sliders; the grippers rotate along the circular guide rail by sliding the sliders in the circular guide rail.

[0027] Furthermore, among all the individual cage units arranged throughout the outer ring, a gripper is used to clamp every 3-4 individual cage units to prevent them from falling off.

[0028] The beneficial effects of the cage of this invention are as follows: It has a unique structural design, is disc-shaped, and is composed of several independent units; it uses a radial roller guidance method, which provides radial support, occupies little space, reduces cage friction, is easy to manufacture, reduces the overall weight of the cage, improves the overall energy efficiency of the bearing, extends the bearing's service life, and reduces vibration and noise during bearing use. The cost reduction also provides greater flexibility in material selection; the design of the lubrication holes and grooves creates favorable conditions for roller lubrication, improving the stability of bearing operation. Attached Figure Description

[0029] Figure 1 This is an overall structural diagram of the disc cage for tapered roller bearings according to the present invention.

[0030] Figure 2 for Figure 1 Side view.

[0031] Figure 3 This is a schematic diagram of the assembly structure of the cage in the bearing according to the present invention.

[0032] Figure 4 for Figure 3 The outer ring cross-sectional structure diagram.

[0033] Figure 5 This is a structural diagram of a single unit of the cage of the present invention.

[0034] Figure 6 This is a cross-sectional view of the cage of the present invention.

[0035] Figure 7 for Figure 5 The right view.

[0036] Figure 8 for Figure 5 Top view.

[0037] Figure 9 This is a structural diagram showing the location of the arc-shaped contact surface of the extended portion in the independent unit of the cage.

[0038] Figure 10 This is a structural diagram showing the position of the rolling mechanism on the outer edge of the independent cage unit.

[0039] Figure 11 For auxiliary tooling structure diagram.

[0040] Figure 12 for Figure 11 A bottom view.

[0041] Figure 13 Assembly drawing for auxiliary tooling in the outer ring.

[0042] Figure 14 for Figure 13 Structure diagram of the contact state between the independent unit of the cage and the gripper.

[0043] In the figure, 1. Independent unit, 2. Semi-open pocket, 3. Outer ring, 4. Inner ring, 5. Radial positioning groove, 1.1. Outer edge, 1.2. Extension, 1.1.1. Side elevation, 1.1.2. Top surface, 6. Cylindrical hole, 7. Oil hole, 1.2.1. Plane, 1.2.2. Arc-shaped contact surface, 1.2.3. Groove, 1.2.4. End face, 8. Steel ball, 9. Spherical groove, 10. Circular guide rail, 11. Handle, 12. Slider, 13. Outer ring. Detailed Implementation

[0044] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0045] like Figure 1 , 2 The disc cage for tapered roller bearings shown in Figures 5-10 includes: a whole annular disc formed by several independent units 1, and the several independent units 1 are connected by a rolling mechanism; each pair of adjacent independent units 1 is assembled into a semi-open pocket 2, and a roller is installed in each pocket 2.

[0046] The disc cage is used in tapered roller bearings, such as... Figure 3 , 4 As shown, it also includes: an outer ring 3 and an inner ring 4; the inner diameter of the outer ring 3 and the outer diameter of the inner ring 4 are respectively provided with raceways that mate with the outer circumferential surface of the roller, and radial positioning grooves 5 are provided on the raceways. The cage is installed in the radial positioning grooves 5, so that the outer diameter direction of the cage faces the outer ring raceway, and the opening of the semi-open pocket 2 of the cage faces the inner ring raceway.

[0047] The outer ring 3 is a non-flange inclined raceway, and the inner ring 4 is a double-flange inclined raceway. The large end of the outer ring 3 and the small end of the inner ring 4 are in the same direction. Conversely, the small end of the outer ring 3 and the large end of the inner ring 4 are in the same direction.

[0048] Furthermore, the radial positioning groove 5 is located above the center line of the roller on the outer raceway. The radial positioning groove 5 is used to store the cage and plays a positioning role.

[0049] Furthermore, each independent unit includes: an outer edge portion 1.1 and an extension portion 1.2 integrally connected to the outer edge portion 1.1; the cross-sectional widths of the outer edge portion 1.1 and the extension portion 1.2 are the same; the entire width of the outer edge portion 1.1 fits perfectly into the radial positioning groove 5 of the outer ring raceway, such that the two side walls of the outer edge portion 1.1 respectively mate with the inner side walls of the radial positioning groove 5, and the connecting surface between the two side walls of the outer edge portion 1.1 mates with the bottom of the radial positioning groove 5;

[0050] Furthermore, the outer edge portion 1.1 includes: two opposing side facades 1.1.1 and an upper surface 1.1.2 connected to the upper edges of the two side facades 1.1.1; a cylindrical hole 6 is provided through both side facades 1.1.1, which is used to store lubricating oil;

[0051] Furthermore, the upper surface 1.1.2, which connects the upper edges of the two side facades 1.1.1, is a curved surface smaller than the diameter of the radial positioning groove 5. An oil hole 7, which communicates with the cylindrical hole, is opened downward from the upper surface 1.1.2. The oil hole 7 is used for lubrication.

[0052] Furthermore, the extension portion 1.2 is perpendicular to the roller axis and located at the center of the roller;

[0053] Furthermore, the length of the extended portion 1.2 extending on the roller is greater than three-quarters of the roller diameter and less than five-sixths of the roller diameter, which serves to support the roller without contacting the raceway, thus increasing the friction force when the roller rotates.

[0054] Furthermore, the extension portion 1.2 is designed with front and rear planes 1.2.1, and both ends are arc-shaped contact surfaces 1.2.2 that are adapted to the outer periphery of the roller;

[0055] Furthermore, grooves 1.2.3 are formed on the arc-shaped contact surface 1.2.2 for auxiliary lubrication;

[0056] In each independent unit 1, the surface between the two opposing side faces 1.1.1 of the outer edge portion 1.1 is the two end faces 1.2.4 of the outer edge portion 1.1. The rolling mechanism is arranged between the end faces 1.2.4 of the outer edge portion 1.1 of each two adjacent independent units 1. The cage rotates in the radial positioning groove 5 of the outer ring through the rolling mechanism of the outer edge portion 1.1, so that the contact between the cage and the outer ring 3 changes from sliding friction to rolling friction.

[0057] Furthermore, the rolling mechanism adopts the form of rolling steel balls 8, and the end face 1.2.4 of the outer edge portion 1.1 is provided with a spherical groove 9 adapted to the steel ball 8. The steel ball 8 is located in the spherical groove 9 of the outer edge portion 1.1 of two adjacent independent units 1.

[0058] Furthermore, the diameter of the spherical groove 9 is slightly larger than the diameter of the steel ball 8, so that the steel ball 8 can be inserted.

[0059] Furthermore, the center of the spherical groove 9 is located at the center of the outer radial positioning groove 5 to facilitate positioning.

[0060] When assembling the cage structure described above in the tapered roller bearing, it needs to be arranged with one cage unit and one steel ball at intervals. All cage units need to be installed using auxiliary tooling. After all cage units are placed into the outer ring 13, the inner ring is placed into the assembly position using spacers, and finally the rollers are installed in a certain order. During the installation of each cage unit using auxiliary tooling, the cage units are secured with cable ties at regular intervals to fix their positions and prevent them from falling off. After all the rollers are installed, the cable ties are removed.

[0061] like Figure 11-14 As shown, the auxiliary tooling includes: a circular guide rail 10 and a plurality of grippers 11 rotatably disposed on the lower end face of the circular guide rail. The grippers 11 are rotated along the circular guide rail 10 to clamp the retainer.

[0062] When in use, place the auxiliary tooling directly above the outer ring 13, so that the gripper 11 faces downward toward the cage independent unit;

[0063] The diameter of the circular guide rail 10 is slightly smaller than the raceway diameter of the outer ring 13, so that the tooling can be inserted into the outer ring 13 of the bearing.

[0064] A slider 12 is set at the position corresponding to each gripper 11 on the lower end face of the circular guide rail 10, and the gripper 11 is fixed on the slider 12. In all the independent cage units arranged in the entire outer ring 13, in this embodiment, a gripper 11 is used to clamp every 4 independent cage units to prevent the independent cage units from falling off.

[0065] The disc cage of this invention employs radial roller guidance, providing radial support, occupying minimal space, reducing cage friction, simplifying manufacturing, reducing overall cage weight, improving overall bearing efficiency, extending bearing life, and reducing vibration and noise during operation. The cost reduction also allows for greater flexibility in material selection. The design of the lubrication holes and grooves creates favorable conditions for roller lubrication, improving bearing operational stability.

Claims

1. A disc cage for tapered roller bearings, characterized in that, include: The entire ring-shaped disc is formed by several independent units, and the several independent units are connected by a rolling mechanism; each pair of adjacent independent units is assembled into a semi-open pocket, and a roller is installed in each pocket. The disc cage is used in tapered roller bearings and also includes an outer ring and an inner ring. The inner diameter of the outer ring and the outer diameter of the inner ring are respectively provided with raceways that mate with the outer circumferential surface of the rollers. Radial positioning grooves are provided on the raceways. The cage is installed in the radial positioning grooves so that the outer diameter of the cage faces the outer ring raceway and the semi-open pocket of the cage faces the inner ring raceway. The radial positioning groove is located above the centerline of the roller on the outer raceway; Each independent unit includes: an outer edge portion and an extension portion integrally connected to the outer edge portion; the entire width of the outer edge portion fits perfectly into the radial positioning groove of the outer ring raceway, such that the two side walls of the outer edge portion fit into the inner side walls of the radial positioning groove respectively, and the connecting surface between the two side walls of the outer edge portion fits into the bottom of the radial positioning groove. The outer edge portion includes: two opposing side facades and an upper surface connecting the upper edges of the two side facades; The extension portion is perpendicular to the roller axis and located at the center of the roller; In each independent unit, the surface between the two opposing side elevations of the outer edge portion is the two end faces of the outer edge portion. The rolling mechanism is arranged between the end faces of the outer edge portion of each two adjacent independent units. The cage rotates in the radial positioning groove of the outer ring through the rolling mechanism of the outer edge portion. The contact between the cage and the outer ring is rolling friction. The rolling mechanism adopts a steel ball rolling form, and the end face of the outer edge portion is provided with a spherical groove adapted to the steel ball. The steel ball is located in the spherical groove of the outer edge portion of two adjacent independent units.

2. The disc cage for tapered roller bearings according to claim 1, characterized in that: Cylindrical holes are provided running through both sides of the facade.

3. The disc cage for tapered roller bearings according to claim 1, characterized in that: The upper surface connecting the upper edge of the two side facades is a curved surface smaller than the diameter of the radial positioning groove, and an oil hole communicating with the cylindrical hole is opened downward from the upper surface.

4. The disc cage for tapered roller bearings according to claim 1, characterized in that: The extension portion extends on the roller for a length greater than three-quarters of the roller's diameter and less than five-sixths of the roller's diameter.

5. The disc cage for tapered roller bearings according to claim 1, characterized in that: The extension portion has a front and rear planar design, with both ends being arc-shaped contact surfaces adapted to the outer periphery of the roller; grooves are formed on the arc-shaped contact surfaces.

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