Tapered roller bearing with turned retainer
By setting locking points and arc grooves on the hole beams of the tapered roller bearing of the vehicle cage, locking the rollers, the problem of stamping frame failure at high temperatures is solved, and the smooth operation and high reliability of the bearing are achieved.
Patent Information
- Application Number
- CN202420631961.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-29
- Publication Date
- 2024-12-24
- Estimated Expiration
- 2034-03-29
AI Technical Summary
Existing tapered roller bearings are prone to stamping frame failure under high-temperature swing conditions, resulting in unstable bearing operation and stagnation.
A car cage tapered roller bearing is designed. By setting multiple locking points and arc grooves on the hole beam, a pocket hole is formed to lock the roller, ensuring uniform and reliable force, preventing the roller from falling out, and Keep the bearing running smoothly under high temperature conditions.
It effectively solves the problem of failure of tapered roller stamping frame, ensures that the bearing operates smoothly under high-temperature swing conditions and has no stagnation, improving the service life and reliability of the bearing.
Smart Images
Figure CN222229173U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of tapered roller bearings, in particular to a machined retainer tapered roller bearing. Background Art
[0002] At present, some tapered roller bearings used in the aviation field have an operating temperature of about 500°C. They are mainly subjected to large radial loads and a certain overturning bending moment during operation, and have a small design space under swinging conditions. When using stamped cage tapered roller bearings, the cage is the first to be damaged. In order to meet the requirements of the required working conditions, it is urgent to design a high-temperature resistant tapered roller bearing with good force performance, long service life and high reliability. Utility Model Content
[0003] In view of the defects of the prior art, the utility model provides a machined retainer tapered roller bearing, which can solve the problem of failure of the tapered roller stamping frame under high temperature swing conditions, that is, it can ensure that the bearing runs smoothly without sticking.
[0004] In order to achieve the above-mentioned purpose, the technical solution provided by the utility model is a machined retainer tapered roller bearing, which includes an inner ring, an outer ring, a retainer and a roller, the retainer includes a plurality of hole beams, each hole beam has a first side surface and a second side surface arranged opposite to each other, the first side surface is respectively provided with a first locking point and a second locking point at both ends of the length direction of the hole beam, the second side surface is respectively provided with a third locking point and a fourth locking point at both ends of the length direction of the hole beam, pockets are formed between adjacent hole beams, when rollers are installed in the pockets, the first locking point and the third locking point lock one end of the roller, and the second locking point and the fourth locking point lock the other end of the roller.
[0005] Furthermore, arc grooves are provided at the four corners of the pocket hole to disperse stress.
[0006] Furthermore, the first locking point, the second locking point, the third locking point and the fourth locking point are all connected to the corresponding arc grooves.
[0007] Furthermore, the first locking point, the second locking point, the third locking point and the fourth locking point are all trapezoidal convex portions, and one side of the trapezoidal convex portion forms an arc transition with the adjacent arc groove.
[0008] Furthermore, the first locking point and the third locking point are both arranged at the large end of the roller, and the second locking point and the fourth locking point are both arranged at the small end of the roller.
[0009] Furthermore, the first locking point and the third locking point are equal in length, and the length between the first locking point and the third locking point is approximately 1 / 25 of the length of the tapered roller.
[0010] Furthermore, the second locking point is equal to the fourth locking point in length and is smaller than the first locking point in length.
[0011] Furthermore, the inclination angle of the retaining frame is the same as the angle of the outer ring.
[0012] Furthermore, the inner ring, outer ring and rollers are all Cr14Mo4V high-temperature stainless steel parts.
[0013] Furthermore, the retaining frame is made of 14Cr17Ni2 high-temperature stainless steel.
[0014] Furthermore, the first locking point, the second locking point, the third locking point and the fourth locking point are all arranged on one side of the outer diameter of the pocket.
[0015] The beneficial effects of the utility model are as follows: the machined retainer tapered roller bearing is provided with a first locking point, a second locking point, a third locking point and a fourth locking point on the hole beam, which are respectively located at the four corners of the pocket hole, so that the force is evenly distributed and the locking is effective and reliable. When a roller is installed in the pocket hole, the first locking point and the third locking point lock one end of the roller, and the second locking point and the fourth locking point lock the other end of the roller to prevent the roller from falling out from the outer diameter side without affecting the operation of the roller in the retainer. The machined retainer tapered roller bearing can solve the problem of failure of the tapered roller stamping frame under high temperature swinging working conditions, that is, it can ensure that the bearing runs smoothly without sticking. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 It is a structural schematic diagram of a machined retainer tapered roller bearing in one embodiment of the utility model;
[0017] Figure 2 It is a structural schematic diagram of the pocket position of a machined retainer tapered roller bearing in one embodiment of the utility model;
[0018] Figure 3 It is a partial schematic diagram of a machined retainer tapered roller bearing in one embodiment of the utility model;
[0019] Figure 4 for Figure 3 View from the middle B direction;
[0020] Figure 5 for Figure 3 View from the middle C direction;
[0021] In the figure:
[0022] 100, inner circle,
[0023] 200, outer circle,
[0024] 300, retaining frame, 310, hole beam, 311, first side surface, 311a, first locking point, 311b, second locking point, 312, second side surface, 312a, third locking point, 312b, fourth locking point, 320, pocket hole, 321, arc groove,
[0025] 400. Roller. DETAILED DESCRIPTION
[0026] 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.
[0027] See also Figure 1 A machined retainer tapered roller bearing comprises an inner ring 100, an outer ring 200, a retainer 300 and a roller 400. The retainer 300 comprises a plurality of hole beams 310. Each hole beam 310 has a first side surface 311 and a second side surface 312 which are arranged opposite to each other. The first side surface 311 is provided with a first locking point 311a and a second locking point 311b at both ends of the hole beam in the length direction, respectively. The second side surface 312 is provided with a third locking point 312a and a fourth locking point 312b at both ends of the hole beam 310 in the length direction, respectively. Pockets 320 are formed between adjacent hole beams 310. When a roller 400 is installed in the pocket 320, the first locking point 311a and the third locking point 312a lock one end of the roller 400, and the second locking point 311b and the fourth locking point 312b lock the other end of the roller 400.
[0028] During the assembly process, the rollers 400 are sequentially placed into the pockets of the retaining frame 300 and pushed to the four locking points on the outer diameter; after the inner ring 100 is heated to a certain temperature, as an example, the heating temperature in this embodiment is 200°C, the small rib side of the inner ring 100 is quickly pressed into the retaining frame 300 to form an inseparable inner component.
[0029] The machined retainer tapered roller bearing is provided with a first locking point 311a, a second locking point 311b, a third locking point 312a and a fourth locking point 312b on the hole beam 310, which are respectively located at the four corners of the pocket 320. When the pocket 320 is equipped with a roller 400, the first locking point 311a and the third locking point 312a lock one end of the roller 400, and the second locking point 311b and the fourth locking point 312b lock the other end of the roller 400 to prevent the roller 400 from falling out from the outer diameter side without affecting the operation of the roller 400 in the retainer. The machined retainer tapered roller bearing can solve the problem of failure of the tapered roller stamping frame under high temperature swing working conditions, that is, it can ensure that the bearing runs smoothly without sticking.
[0030] In one embodiment, arc grooves 321 are formed at four corners of the pocket hole 320 to disperse stress.
[0031] In one embodiment, the first locking point 311a, the second locking point 311b, the third locking point 312a and the fourth locking point 312b are all connected to the corresponding arc groove 321. Such a configuration can effectively prevent stress concentration.
[0032] In one embodiment, the first locking point 311a, the second locking point 311b, the third locking point 312a and the fourth locking point 312b are all trapezoidal protrusions, and one side of the trapezoidal protrusion forms an arc transition with the adjacent arc groove 321.
[0033] In one embodiment, the first locking point 311 a and the third locking point 312 a are both disposed at the large end of the roller 400 , and the second locking point 311 b and the fourth locking point 312 b are both disposed at the small end of the roller 400 .
[0034] In one embodiment, the length of the first locking point 311a and the third locking point 312a is equal, and the length of the first locking point 311a and the third locking point 312a is about 1 / 25 of the length of the roller 400. Such a setting can ensure that the tapered roller is loaded from the inner diameter of the cage and does not fall out when pushed to the outer diameter. The length of the first locking point 311a and the third locking point 312a is equal, and such a setting can lock the large end size of the tapered roller at the same position and the same width. In this embodiment, the length of the first locking point 311a and the third locking point 312a is 1 / 25 of the length of the roller 400. The design can just lock the roller 400, and can ensure that the locking point is not too long, which greatly reduces the weight of the cage.
[0035] In one embodiment, the length of the second locking point 311b is equal to that of the fourth locking point 312b, and is smaller than that of the first locking point 311a. In this embodiment, the length of the second locking point 311b is smaller than that of the first locking point 311a, that is, the sizes of the locking points at both ends are adaptively set in view of the different sizes of the large end and the small end of the roller 400. With such a setting, the size of the first locking point 311a can lock the large end of the tapered roller more stably, and the second locking point 311b can lock the small end of the tapered roller more stably, and avoid the size of the four locking points being set too long, increasing the weight, and affecting the working state, and optimizing the size of the four locking points as much as possible, and finding a balance between the locking stability requirement and the weight reduction requirement of the cage.
[0036] In one embodiment, the inclination angle of the retainer 300 is the same as that of the outer ring 200. After the tapered roller bearing is assembled, the inner diameter of the large end and the inner diameter of the small end of the machined retainer 300 are respectively the same as the clearance values of the large rib and the small rib of the inner ring. In addition, the roller assembly of the machined retainer of the tapered roller bearing needs to be interference fit with the diameter of the small rib of the inner ring. The interference fit needs to be determined according to the specific bearing size to ensure that the rollers are not scratched during the assembly process and that the sleeves do not fall apart after assembly.
[0037] In one embodiment, the inner ring 100, the outer ring 200 and the roller 400 are all Cr14Mo4V high temperature stainless steel parts, which are suitable for high temperature environments; the cage 300 is 14Cr17Ni2 high temperature stainless steel. The machined solid cage has high strength, a large capacity for the roller 400, a high strength of the beam between the two pockets, and is not easily deformed during use, thus meeting the use requirements.
[0038] In one embodiment, the first locking point 311 a , the second locking point 311 b , the third locking point 312 a and the fourth locking point 312 b are all disposed on one side of the outer diameter of the pocket hole 320 .
[0039] 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.
[0040] 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.
[0041] 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.
[0042] In the present utility model, unless otherwise clearly specified and limited, the first feature "above" or "below" the second feature may be 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 "above", "above" and "above" the second feature may be that the first feature is directly above or obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. The first feature "below", "below" and "below" the second feature may be that the first feature is directly below or obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature. It should be noted that when an element is referred to as "fixed to" or "set on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected" to another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.
Claims
1. A machined retainer tapered roller bearing, comprising an inner ring, an outer ring, a retainer and a roller, characterized in that: The retaining frame includes a plurality of hole beams, each of which has a first side surface and a second side surface arranged opposite to each other, the first side surface is respectively provided with a first locking point and a second locking point at both ends of the hole beam in the length direction, the second side surface is respectively provided with a third locking point and a fourth locking point at both ends of the hole beam in the length direction, pockets are formed between adjacent hole beams, when rollers are installed in the pockets, the first locking point and the third locking point lock one end of the roller, and the second locking point and the fourth locking point lock the other end of the roller; arc grooves are provided at the four corners of the pockets to disperse stress; the first locking point, the second locking point, the third locking point and the fourth locking point are all connected to the corresponding arc grooves.
2. A machined retainer tapered roller bearing according to claim 1, characterized in that: The first locking point, the second locking point, the third locking point and the fourth locking point are all trapezoidal convex parts, and one side of the trapezoidal convex part forms an arc transition with the adjacent arc groove.
3. A machined retainer tapered roller bearing according to claim 1, characterized in that: The first locking point and the third locking point are both arranged at the large end of the roller, and the second locking point and the fourth locking point are both arranged at the small end of the roller.
4. A machined retainer tapered roller bearing according to claim 3, characterized in that: The first locking point and the third locking point are equal in length, and the length between the first locking point and the third locking point is approximately 1 / 25 of the length of the tapered roller.
5. A machined retainer tapered roller bearing according to claim 4, characterized in that: The second locking point is equal to the fourth locking point in length and is shorter than the first locking point in length.
6. A machined retainer tapered roller bearing according to claim 1, characterized in that: The inclination angle of the retaining frame is the same as that of the outer ring.
7. The machined retainer tapered roller bearing according to claim 1, characterized in that: The inner ring, outer ring and rollers are all Cr14Mo4V high-temperature stainless steel parts; the retaining frame is 14Cr17Ni2 high-temperature stainless steel.
8. The machined retainer tapered roller bearing according to claim 1, characterized in that: The first locking point, the second locking point, the third locking point and the fourth locking point are all arranged on one side of the outer diameter of the pocket.