Disc type retainer for tapered roller bearing

Abstract

The utility model relates to a disc-type retainer for a tapered roller bearing, which comprises a whole ring-type disc-shaped body defined by a plurality of independent units, and the independent units are connected through rolling mechanisms; every two adjacent independent units are spliced to form a semi-open pocket, and a roller is correspondingly mounted in each pocket; the structural design is unique, the whole retainer is in a disc shape, and the whole retainer is formed by combining a plurality of independent units; a roller radial guide mode is adopted, certain radial support can be provided, the occupied space is small, the friction force of the retainer is reduced, the manufacturing difficulty is low, the overall weight of the retainer is reduced, the overall energy efficiency of the bearing is improved, the service life of the bearing is prolonged, and vibration and noise of the bearing in the using process are reduced. Meanwhile, the cost is reduced, so that a larger space is provided for material selection; and the design of the lubricating oil holes and the lubricating grooves creates good conditions for lubrication of the rollers, and improves the running stability of the bearing.

Description

Technical Field

[0001] The utility model relates to a cage structure of a bearing product, in particular to a disc-type cage for a tapered roller bearing, and belongs to the technical field of bearing cages. Background Art

[0002] The tapered roller bearing cage basically adopts the guidance form of axially surrounding the roller. Most of them are one-piece cages, and some are split cages. The processing cost is high, the cycle is long, and it cannot provide radial support. At the same time, the cage occupies a large space and is inconvenient to install in some cases, which brings serious problems to the design and selection of bearings. Utility Model Content

[0003] In view of the technical defects of the above-mentioned prior art, the purpose of the utility model is to provide a disc-type retainer for a tapered roller bearing. Compared with the traditional design, the retainer reaches a breakthrough and novel height. It adopts a roller radial guidance method, can provide a certain radial support, occupies a small space, has low manufacturing difficulty, reduces the overall weight of the retainer, is easy to install, and improves the overall energy efficiency of the bearing.

[0004] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a disc retainer for a tapered roller bearing, comprising: a whole ring-shaped disc body formed by a plurality of independent units, and the plurality of independent units are connected by a rolling mechanism; a semi-open pocket is formed between each two adjacent independent units, and a roller is installed in each pocket;

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

[0006] Furthermore, the disc-type retainer is used in a tapered roller bearing, which further comprises: 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 matching the outer peripheral surface of the roller, the raceways are provided with radial positioning grooves, and the retainer is installed in the radial positioning grooves so that the outer diameter direction of the retainer faces the outer ring raceway, and the semi-open pocket opening of the retainer faces the inner ring raceway;

[0007] The outer ring is a non-ribbed inclined raceway, the inner ring is a double-ribbed inclined raceway, and the outer ring large end is in the same direction as the inner ring small end, and vice versa, the outer ring small end is in the same direction as the inner ring large end;

[0008] Furthermore, the radial positioning groove is located on the outer ring raceway at the upper part of the roller centerline position, and the radial positioning groove is used to store the retaining frame to play a positioning role.

[0009] Furthermore, each independent unit comprises: an outer edge portion and an extension portion connected to the outer edge portion; the outer edge portion and the extension portion have the same cross-sectional width; the entire width of the outer edge portion is just matched to be installed in the radial positioning groove of the outer ring raceway, so that the two side walls of the outer edge portion are respectively matched with the inner side walls of the radial positioning groove, and the connecting surface between the two side walls of the outer edge portion is matched with the groove bottom of the radial positioning groove;

[0010] Furthermore, the outer edge portion includes: two opposite side elevations and an upper surface connected to the upper edges of the two side elevations; a cylindrical hole is provided through the two side elevations, and the cylindrical hole is used to store lubricating oil;

[0011] Furthermore, the upper surface connected to the upper edges of the two side elevations is a curved surface smaller than the diameter of the radial positioning groove, and an oil hole connected to the cylindrical hole is opened downward from the upper surface, and the oil hole is used for lubrication;

[0012] In the above structure, the outer edge portion of the independent unit is used for positioning in the outer ring, and the extended portion is used for guiding the movement of the roller and providing certain support to the roller axial direction;

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

[0014] Furthermore, the length of the extension portion extending on the roller is greater than three-quarters of the roller diameter and less than five-sixths of the roller diameter, which not only supports the roller but also does not contact the raceway, thereby increasing the friction force when the roller rotates;

[0015] Furthermore, the extension part is designed with front and rear planes, and both ends are arc-shaped contact surfaces adapted to the outer circumference of the roller;

[0016] Furthermore, the arcuate contact surface is provided with channel grooves for assisting lubrication; as another optimized design of the present solution, the arcuate contact surface can increase lubrication by adding grooves or other similar structures.

[0017] Furthermore, in each independent unit, the surface between the two opposite side elevations of the outer edge portion is the two end surfaces of the outer edge portion, and the rolling mechanism is arranged between the end surfaces of the outer edge portions of each two adjacent independent units; the retainer 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 retainer and the outer ring changes from sliding friction to rolling friction, thereby reducing the friction of the overall design;

[0018] Furthermore, the rolling mechanism adopts a steel ball rolling form, and the end surface of the outer edge portion is provided with a spherical groove adapted to the steel ball, and the steel ball is located in the spherical groove of the outer edge portions 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 loaded;

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

[0021] When assembling the cage structure of the above structure in the entire tapered roller bearing, it is necessary to arrange the cage independent units and steel balls at intervals; all the cage independent units need to be installed by auxiliary tooling, and after all the cage independent units are placed in the outer ring, the inner ring is placed in the assembly position with a pad, and finally the rollers are installed in a certain order; when installing each cage independent unit with the auxiliary tooling, the cage independent units are fastened with a certain number of cable ties to fix their positions and prevent them from falling; after all the rollers are installed, the cable ties are removed;

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

[0023] Furthermore, the auxiliary tooling includes: a circular guide rail and a plurality of grippers rotatably arranged on the lower end surface of the circular guide rail, and the grippers are rotated along the circular guide rail to clamp the retaining frame;

[0024] When in use, place the auxiliary tooling just above the outer ring with the gripper facing downward toward the cage independent unit;

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

[0026] Furthermore, a slider is provided at a position corresponding to each gripper on the lower end surface of the circular guide rail, and the gripper is fixed on the slider; the gripper rotates along the circular guide rail by sliding the slider in the circular guide rail;

[0027] Furthermore, among all the independent retainer units arranged in the entire outer ring, every 3-4 independent retainer units are clamped with a gripper to prevent the independent retainer units from falling.

[0028] The beneficial effects of the retaining frame of the utility model are: unique structural design, the overall disc form, and the entire retaining frame is composed of a number of independent units; it adopts the method of roller radial guidance, can provide certain radial support, occupies a small space, reduces the friction of the retaining frame, has low manufacturing difficulty, reduces the overall weight of the retaining frame, improves the overall energy efficiency of the bearing, extends the service life of the bearing, reduces the vibration and noise of the bearing during use, and at the same time, the cost reduction also provides more room for the selection of materials; the design of the lubricating oil holes and lubrication grooves creates good conditions for the lubrication of the rollers and improves the stability of the bearing operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 The utility model is a whole structure diagram of a disc type retainer for a tapered roller bearing.

[0030] Figure 2 for Figure 1 Side view of.

[0031] Figure 3 The utility model is a schematic diagram of the assembly structure of the retainer in the bearing.

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

[0033] Figure 5 This is a structural diagram of an independent unit of the retaining frame of the utility model.

[0034] Figure 6 It is a cross-sectional view of the retaining frame of the utility model.

[0035] Figure 7 for Figure 5 Right view of .

[0036] Figure 8 for Figure 5 Top view of the .

[0037] Fig. 9 This is a structural diagram of the position of the arc-shaped contact surface of the extended part in the independent unit of the retainer.

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

[0039] Fig.11 This is the auxiliary tooling structure diagram.

[0040] Fig.12 for Fig.11 Bottom view of .

[0041] Fig.13 This is the assembly drawing of the auxiliary tooling in the outer ring.

[0042] Fig.14 for Fig.13 Structural diagram of the contact state between the independent unit of the middle retainer 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 part, 1.2, extension part, 1.1.1, side elevation, 1.1.2, upper surface, 6, cylindrical hole, 7, oil hole, 1.2.1, plane, 1.2.2, arc-shaped contact surface, 1.2.3, channel groove, 1.2.4, end face, 8, steel ball, 9, spherical groove, 10, circular guide rail, 11, gripper, 12, slider, 13, outer ring. DETAILED DESCRIPTION

[0044] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the utility model, so the utility model is not limited by the specific embodiments disclosed below.

[0045] like Figure 1 , 2 5-10, a disc retainer for a tapered roller bearing, comprising: a whole ring-shaped disc body formed by a plurality of independent units 1, wherein the plurality of independent units 1 are connected by a rolling mechanism; a semi-open pocket 2 is formed between each two adjacent independent units 1, 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 match the outer circumferential surface of the roller, and radial positioning grooves 5 are opened 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-ribbed inclined raceway, the inner ring 4 is a double-ribbed inclined raceway, and the direction of the large end of the outer ring 3 is the same as the direction of the small end of the inner ring 4. Conversely, the direction of the small end of the outer ring 3 is the same as the direction of the large end of the inner ring 4.

[0048] Furthermore, the radial positioning groove 5 is located on the outer ring raceway at the upper part of the roller centerline position, and the radial positioning groove 5 is used to store the retaining frame to play a positioning role.

[0049] Furthermore, each independent unit comprises: an outer edge portion 1.1 and an extension portion 1.2 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 is just matched to be installed in the radial positioning groove 5 of the outer ring raceway, so that the two side walls of the outer edge portion 1.1 are respectively matched 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 is matched with the groove bottom of the radial positioning groove 5;

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

[0051] Furthermore, the upper surface 1.1.2 connected to the upper edges of the two side elevations 1.1.1 is a curved surface smaller than the diameter of the radial positioning groove 5, and an oil hole 7 connected to the cylindrical hole is opened downward from the upper surface 1.1.2, and the oil hole 7 is used for lubrication;

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

[0053] Furthermore, the length of the extension part 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 not only supports the roller but also does not contact the raceway, thereby increasing the friction force when the roller rotates;

[0054] Furthermore, the extension part 1.2 is designed as a front and rear plane 1.2.1, and both ends are arc-shaped contact surfaces 1.2.2 adapted to the outer circumference of the roller;

[0055] Furthermore, the arc-shaped contact surface 1.2.2 is provided with a channel groove 1.2.3 for auxiliary lubrication;

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

[0057] Furthermore, the rolling mechanism adopts the rolling form of a steel ball 8, and the end surface 1.2.4 of the outer edge portion 1.1 is provided with a spherical groove 9 adapted to the steel ball 8, and the steel ball 8 is located in the spherical groove 9 of the outer edge portions 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 loaded;

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

[0060] When assembling the cage structure of the above structure in the entire tapered roller bearing, it is necessary to arrange the cage independent units and steel balls at intervals; all the cage independent units need to be installed by auxiliary tooling, and after all the cage independent units are placed in the outer ring 13, the inner ring is placed in the assembly position with a pad, and finally the rollers are installed in a certain order; when installing each cage independent unit with the auxiliary tooling, the cage independent units are fastened with a certain number of cable ties to fix their positions and prevent them from falling; 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 arranged on the lower end surface of the circular guide rail, and the grippers 11 are rotated along the circular guide rail 10 to clamp the retaining frame;

[0062] When in use, place the auxiliary tooling just above the outer ring 13, with the gripper 11 facing downward toward the independent unit of the cage;

[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 extend into the bearing outer ring 13;

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

[0065] The disc cage of the utility model adopts the roller radial guidance method, can provide certain radial support, occupies little space, reduces the friction of the cage, is easy to manufacture, reduces the overall weight of the cage, improves the overall energy efficiency of the bearing, extends the service life of the bearing, reduces the vibration and noise of the bearing during use, and at the same time, the cost reduction also provides more space for the selection of materials. The design of the lubricating oil hole and the lubricating groove creates good conditions for the lubrication of the roller and improves the stability of the bearing operation.

[0066] 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 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, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0067] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0068] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0069] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a 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, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

Claims

1. A disc-type retainer for a tapered roller bearing, characterized in that: include: The entire annular disc-shaped body is formed by a plurality of independent units, and the independent units are connected by rolling mechanisms; a semi-open pocket is formed between each two adjacent independent units, and a roller is installed in each pocket.

2. A disc-type retainer for a tapered roller bearing according to claim 1, characterized in that: The disc-type retainer is used in a tapered roller bearing, which 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 match the outer circumferential surface of the roller, and radial positioning grooves are opened on the raceways. The retainer is installed in the radial positioning grooves so that the outer diameter direction of the retainer faces the outer ring raceway, and the semi-open pocket opening of the retainer faces the inner ring raceway.

3. A disc-type retainer for a tapered roller bearing according to claim 2, characterized in that: The radial locating groove is located on the outer ring raceway above the roller centerline.

4. A disc-type retainer for a tapered roller bearing according to claim 1, characterized in that: Each independent unit includes: an outer edge part and an extension part connected to the outer edge part; the cross-sectional widths of the outer edge part and the extension part are the same; the entire width of the outer edge part is just fitted into the radial positioning groove of the outer ring raceway, so that the two side walls of the outer edge part respectively match the inner side walls of the radial positioning groove, and the connecting surface between the two side walls of the outer edge part matches the groove bottom of the radial positioning groove.

5. A disc-type retainer for a tapered roller bearing according to claim 4, characterized in that: The outer edge portion includes: two opposite side facades and an upper surface connected to the upper edges of the two side facades; and cylindrical holes are arranged through the two side facades.

6. A disc-type retainer for a tapered roller bearing according to claim 5, characterized in that: The upper surface connected to the upper edges of the two side elevations is a curved surface smaller than the diameter of the radial positioning groove, and an oil hole connected to the cylindrical hole is opened downward from the upper surface.

7. A disc-type retainer for a tapered roller bearing according to claim 4, characterized in that: The extension part is perpendicular to the roller axis and is located at the center of the roller; the length of the extension part extending on the roller is greater than three quarters of the roller diameter and less than five sixths of the roller diameter.

8. The disc-type retainer for a tapered roller bearing according to claim 5, characterized in that: In each independent unit, the surface between the two opposite side elevations of the outer edge part is the two end surfaces of the outer edge part, and the rolling mechanism is arranged between the end surfaces of the outer edge parts of each two adjacent independent units; the retaining frame rotates in the radial positioning groove of the outer ring through the rolling mechanism of the outer edge part.

9. A disc-type retainer for a tapered roller bearing according to claim 8, characterized in that: The rolling mechanism adopts the rolling form of steel balls, and the end surface of the outer edge part is provided with a spherical groove matched with the steel ball, and the steel ball is located in the spherical groove of the outer edge parts of two adjacent independent units.

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