Tapered roller bearing retainer and tapered roller bearing

Abstract

According to the tapered roller bearing retainer and the tapered roller bearing, in two window beams used for forming any window hole, one window beam is provided with a first blocking wall facing the window hole, the other window beam is provided with a second blocking wall facing the window hole, and the first blocking wall and the second blocking wall abut against a rolling body installed in the window hole in a limiting mode; the first retaining wall is provided with a first oil passing groove, the second retaining wall is provided with a second oil passing groove, and the first oil passing groove and the second oil passing groove extend in the inside-outside direction of the tapered roller bearing retainer; the first oil passing groove is configured to be of a structure with the width gradually reduced in the direction from the outer side to the inner side of the tapered roller bearing retainer. According to the tapered roller bearing retainer, in the operation process of a tapered roller bearing, the rolling bodies have the floating tendency of being far away from the first retaining wall, rolling friction generated between the rolling bodies and the first retaining wall is reduced, the problems of friction, abrasion, noise, high heat and vibration generated in the operation process of the bearing are effectively solved, and the service life is greatly prolonged.

Description

Technical Field

[0001] The present application relates to the field of bearing technology, and specifically to a tapered roller bearing retainer and a tapered roller bearing. Background Art

[0002] The bearing cage is an important component in the rolling bearing. It is also the most complex and expensive component in the bearing. It plays the role of maintaining the correct movement of the rolling elements and improving the bearing load distribution and lubrication performance.

[0003] A tapered roller bearing cage is a cage structure suitable for tapered roller bearings. It includes a large-diameter ring frame and a small-diameter ring frame connected by multiple window beams. A window aperture is formed between two adjacent window beams for mounting the rolling elements of the tapered roller bearing. However, the inventors have discovered that the outer surface of the rolling element is in surface contact with the sidewalls of the window beams, generating significant friction between the rolling element and the window beams during rotation. This can easily damage the surface of the rolling element, affecting the service life of the rollers and causing wear, temperature rise, noise, and vibration problems in the tapered roller bearings, shortening the bearing life. In particular, for tapered roller bearings used in unidirectional rotating mechanisms, they primarily rotate in the same direction when the mechanism is in operation. Therefore, the force exerted by the rolling element within the window aperture is primarily concentrated on one side of the window beam. This causes the friction, noise, and vibration problems between the window beam and the rolling element on this side to be more severe than those on the other side, resulting in a shorter service life. This has become a pressing issue in the field of bearing technology that needs to be addressed. Utility Model Content

[0004] The present application provides a tapered roller bearing retainer and a tapered roller bearing, which effectively solve the problems of friction, wear, temperature rise, noise and vibration existing in the prior art caused by the surface contact between the rolling body and the window beam during the rotation process.

[0005] The technical solutions adopted in this application are:

[0006] A tapered roller bearing retainer includes a large-diameter ring frame and a small-diameter ring frame, the large-diameter ring frame and the small-diameter ring frame are connected by multiple window beams, a window hole for mounting a rolling element of a tapered bearing is formed between two adjacent window beams, one of the two window beams for forming any window hole is provided with a first retaining wall facing the window hole, and the other is provided with a second retaining wall facing the window hole, the first retaining wall and the second retaining wall resist and limit the rolling element installed in the window hole, the first retaining wall is provided with a first oil passage groove, and the second retaining wall is provided with a second oil passage groove, the first oil passage groove and the second oil passage groove extend along the inward and outward directions of the tapered roller bearing retainer; along the direction from the outer side to the inner side of the tapered roller bearing retainer, the first oil passage groove is configured as a structure with a gradually decreasing width.

[0007] The tapered roller bearing cage provided in this application also includes the following additional technical features:

[0008] The first oil passage groove is configured as an isosceles trapezoidal structure, and the small end opening and the large end opening of the first oil passage groove both extend along the length direction of the window beam.

[0009] The ratio of the width dimension L1 of the small end opening to the width dimension L2 of the large end opening of the first oil passage groove is not greater than 0.6.

[0010] Along the length direction of the window beam, the first retaining wall is provided with a plurality of the first oil-passing grooves arranged at equal intervals.

[0011] Along the direction from the outer side to the inner side of the tapered roller bearing retainer, the first oil groove is configured as a structure with a gradually decreasing depth.

[0012] The second oil passage trough is configured as a rectangular structure.

[0013] Along the direction from the inner side of the tapered roller bearing retainer to the outer side, the second oil groove is configured as a structure with a gradually decreasing width.

[0014] Along the length direction of the window beam, the second retaining wall is provided with a plurality of second oil passage grooves arranged at equal intervals.

[0015] A tapered roller bearing comprises the tapered roller bearing retainer as described above.

[0016] Due to the adoption of the above-mentioned technical scheme, the technical effects achieved by the present application include at least the following: the tapered roller bearing retainer of the present application, the first retaining wall is provided with a first oil groove, and the second retaining wall is provided with a second oil groove. On the one hand, it helps to reduce the contact area with the rolling element, thereby reducing the friction generated during operation; on the other hand, the first oil groove and the second oil groove constitute a circulation channel for the lubricating oil to circulate in the window hole. During the operation of the bearing, the rolling element rotates in the window hole and drives the lubricating oil through one of the first oil groove and the second oil groove to enter the inner side of the tapered roller bearing retainer, and then enters the outer side of the tapered roller bearing retainer through the other of the two, so that the rolling element is fully lubricated by the circulating flow of the lubricating oil. In addition, the tapered roller bearing cage of the present application is particularly suitable for tapered roller bearings used in unidirectional rotating mechanisms, that is, the tapered roller bearings mainly rotate in a single direction. For the tapered roller bearing cage, the first retaining wall of the window beam can be the main object of action when the rolling body rotates. When the rolling body rotates, the lubricating oil on the outside of the tapered roller bearing cage is brought into the inside of the tapered roller bearing cage through the first oil groove, and the lubricating oil on the inside of the tapered roller bearing cage is brought into the outside of the tapered roller bearing cage through the second oil groove. Due to the direction along the outside of the tapered roller bearing cage pointing to the inside, the lubricating oil As the lubricating oil and the air flow generated by the rotation of the rolling elements enter the first oil groove from the outside of the tapered roller bearing retainer, due to the gradual reduction of the flow space, a large hydraulic pressure and air pressure will be generated in the first oil groove, so that the lubricating oil and the air flow squeeze the rolling elements outward, causing the rolling elements to float away from the first baffle wall, effectively reducing the rolling friction between the rolling elements and the first baffle wall during rotation, effectively improving the friction, wear, noise, high heat and vibration problems generated during the operation of the bearing, and greatly improving the service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0018] Figure 1 A schematic structural diagram of a tapered roller bearing cage provided in an embodiment of the present application;

[0019] Figure 2 for Figure 1 A partial enlarged view of the middle A;

[0020] Figure 3 for Figure 1 A partial enlarged view of point B in the middle;

[0021] Figure 4This is an assembly diagram of the tapered roller bearing cage and rolling elements provided in an embodiment of the present application, wherein the direction indicated by arrow X is the running direction of the tapered roller bearing cage, the direction indicated by arrow Y is the rotational direction of the rolling elements, and the direction indicated by arrow Z is the flow direction of lubricating oil from the outside of the tapered roller bearing cage into the first oil groove;

[0022] Figure 5 for Figure 4 A partial enlarged view of point C in the middle.

[0023] List of parts and reference numerals:

[0024] 10 tapered bearing cage;

[0025] 1 large diameter ring frame;

[0026] 2 trail ring frames;

[0027] 3 window beam, 31 first retaining wall, 311 first oil trough, 312 small end opening, 313 large end opening, 32 second retaining wall, 321 second oil trough;

[0028] 4 window holes;

[0029] 5 rolling elements. DETAILED DESCRIPTION

[0030] In order to more clearly illustrate the overall concept of the present application, a detailed description is given below in an illustrative manner in conjunction with the accompanying drawings.

[0031] In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present application is not limited to the specific embodiments disclosed below.

[0032] In this application, unless otherwise expressly specified or limited, terms such as "installed," "connected," "connect," and "fixed" should be understood in a broad sense. For example, they may refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0033] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "examples," "specific examples," or "some examples" means that a specific feature, structure, material, or characteristic described in conjunction with that embodiment or example is included in at least one embodiment or example of the present application. Throughout this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0034] In the embodiments of this application, a tapered roller bearing retainer is provided. For ease of explanation and understanding, the following content provided herein is based on the illustrated product structure. Of course, those skilled in the art will understand that the above structure is merely a specific example and schematic illustration and does not constitute a specific limitation on the technical solution provided herein.

[0035] like Figures 1 to 3 As shown, a tapered roller bearing retainer 10 provided in the present application includes a large-diameter ring frame 1 and a small-diameter ring frame 2, the large-diameter ring frame 1 and the small-diameter ring frame 2 are connected by a plurality of window beams 3, and a window hole 4 for installing the rolling element of the tapered bearing is formed between two adjacent window beams 3. Among the two window beams 3 used to form any window hole 4, one is provided with a first retaining wall 31 facing the window hole 4, and the other is provided with a second retaining wall 32 facing the window hole 4, the first retaining wall 31 and the second retaining wall 32 resist and limit the rolling element installed in the window hole 4, the first retaining wall 31 is provided with a first oil passage groove 311, and the second retaining wall 32 is provided with a second oil passage groove 321, the first oil passage groove 311 and the second oil passage groove 321 extend along the inward and outward directions of the tapered roller bearing retainer 10; along the outer side of the tapered roller bearing retainer 10 pointing to the inner side, the first oil passage groove 311 is configured as a structure with gradually decreasing width. The following explains the in-and-out directions: The tapered roller bearing retainer 10 is an annular structure, with the inner cavity of the annular structure being its inner side, and the outer periphery of the annular structure being its outer side. Therefore, the in-and-out directions refer to directions from the outer periphery toward the inner cavity of the tapered roller bearing retainer 10, or from the inner cavity toward the outer periphery of the tapered roller bearing retainer 10. Specifically, because each window beam 3 encloses two window openings 4 on its left and right sides, one sidewall of each window beam 3 serves as a first retaining wall 31 corresponding to one window opening 4, while the other sidewall serves as a second retaining wall 32 corresponding to the other window opening 4.

[0036] The tapered roller bearing retainer 10 of the present application has a first oil passage groove 311 provided on the first retaining wall 31 and a second oil passage groove 321 provided on the second retaining wall 32. On the one hand, this helps to reduce the contact area between the first retaining wall 31 and the second retaining wall 32 and the rolling element, thereby reducing the friction generated during the rotation of the rolling element. On the other hand, the first oil passage groove 311 and the second oil passage groove 321 constitute a circulation channel for the lubricating oil to circulate in the window hole 4. During the operation of the bearing, the rolling element rotates in the window hole 4 and drives the lubricating oil to pass through one of the first oil passage groove 311 and the second oil passage groove 321 into the inner side of the tapered roller bearing retainer 10, and then pass through the other one of the two to enter the outer side of the tapered roller bearing retainer 10. The rolling element is fully lubricated by the circulating flow of the lubricating oil. In addition, the tapered roller bearing retainer 10 of the present application is particularly suitable for tapered roller bearings used in unidirectional rotation mechanisms, that is, tapered roller bearings mainly rotate in a single direction, such as Figure 4 and Figure 5 As shown, it schematically illustrates that when the tapered roller bearing retainer 1 only rotates in the direction indicated by the arrow X, the rotation direction of the rolling element 5 is the direction indicated by the arrow Y, and the direction indicated by the arrow Z is the flow direction of the lubricating oil from the outside of the tapered roller bearing retainer 10 into the first oil groove 311. For the tapered roller bearing retainer 10, the first retaining wall 31 is the main object of action when the rolling element rotates. When the rolling element rotates, the lubricating oil on the outside of the tapered roller bearing retainer 10 is brought into the inside of the tapered roller bearing retainer 10 through the first oil groove 311, and the lubricating oil on the inside of the tapered roller bearing retainer 10 is brought into the outside of the tapered roller bearing retainer 10 through the second oil groove 321. The outer side of the roller bearing retainer 10 points inward, and the width of the first oil groove 311 gradually decreases. Therefore, during the operation, when the lubricating oil and the airflow generated by the rotation of the rolling elements enter the first oil groove 311 from the outer side of the tapered roller bearing retainer 10, due to the gradual reduction of the flow space, a large hydraulic pressure and air pressure will be generated in the first oil groove 311, so that the lubricating oil and airflow squeeze the rolling elements outward, causing the rolling elements to float away from the first baffle wall 31, effectively reducing the rolling friction generated between the rolling elements and the first baffle wall 31 during rotation, effectively improving the friction, wear, noise, high heat and vibration problems generated during the operation of the bearing, and greatly improving the service life.

[0037] As a preferred embodiment of the present application, Figure 2As shown, the first oil passage groove 311 is configured as an isosceles trapezoidal structure, with the small end opening 312 and the large end opening 313 of the first oil passage groove 311 both extending along the length of the window beam 3. The small end opening 312 of the first oil passage groove 311 corresponds to the shorter base of the isosceles trapezoidal structure, while the large end opening 313 corresponds to the longer base of the isosceles trapezoidal structure. The isosceles trapezoidal structure is a regular structure, which facilitates cutting and reduces processing difficulty. Furthermore, it effectively accelerates and pressurizes the incoming lubricating oil, effectively ensuring that the rolling element has a tendency to float away from the first retaining wall 31.

[0038] Further, if Figure 2 As shown, the ratio of the width dimension L1 of the small end opening 312 of the first oil passage groove 311 to the width dimension L2 of the large end opening 313 is not greater than 0.6. For example, when L2 is 10 mm, L1 is 6 mm at most. More preferably, the ratio of L1 to L2 is not less than 0.4. For example, when L2 is 10 mm, L1 is 6 mm at most and 4 mm at least. Through this design, it is avoided that the width dimension of the small end opening 312 of the first oil passage groove 311 is too close to the width dimension of the large end opening 313, resulting in an insignificant speed increase and pressurization effect on the incoming lubricating oil and airflow, resulting in a poor floating effect of the rolling body. It is also avoided that the width dimension of the small end opening 312 of the first oil passage groove 311 is too small, which causes serious blockage of the lubricating oil and reduces the lubrication effect.

[0039] As a preferred embodiment of the present application, Figure 1 and Figure 2 As shown, along the length direction of the window beam 3, the first retaining wall 31 is provided with a plurality of first oil grooves 311 arranged at equal intervals. The plurality of first oil grooves 311 can correspond to a plurality of axial positions of the rolling body. When the bearing is running, the hydraulic pressure and air pressure generated in the plurality of first oil grooves 311 act together on the rolling body, effectively improving the floating effect of the rolling body, reducing friction, and effectively improving the noise, high heat and vibration problems during the operation of the bearing.

[0040] As a preferred embodiment of the present application, the first oil groove 311 is configured to have a gradually decreasing depth along the tapered roller bearing retainer 10, pointing inward from the outside. Specifically, the closer the first oil groove 311 is to the inner side of the tapered roller bearing retainer 10, the smaller its depth becomes. This allows the lubricating oil and the airflow generated by the rolling elements as they enter the first oil groove 311 from the outside of the tapered roller bearing retainer 10 to experience a sudden decrease in flow space, generating greater hydraulic and air pressures and a more pronounced push-up tendency on the rolling elements, thereby effectively enhancing the rolling element's floating effect. For example, if the first oil groove 311 is configured as an isosceles trapezoid, its depth gradually decreases from the large end opening 313 to the small end opening 312.

[0041] The present application does not limit the structure of the second oil passage groove 321. As a preferred embodiment, Figure 1 and Figure 3 As shown, the second oil passage groove 321 is configured as a rectangular structure. As another preferred embodiment, the second oil passage groove 321 is configured to have a gradually decreasing width along the inner side of the tapered roller bearing cage 10 toward the outer side. Although this embodiment is not illustrated in the drawings, for example, the second oil passage groove 321 can also be configured as an isosceles trapezoidal structure, with the large end opening closer to the inner side of the tapered roller bearing cage 10 and the small end opening closer to the outer side of the tapered roller bearing cage 10. As the lubricating oil and the airflow generated by the rotation of the rolling elements flow from the inner side of the tapered roller bearing cage 10 through the second oil passage groove 321 to the outer side of the tapered roller bearing cage 10, the flow space gradually decreases, generating greater hydraulic and pneumatic pressures within the second oil passage groove 321. This causes the lubricating oil and airflow to squeeze the rolling elements outward, causing the rolling elements to float away from the second retaining wall 32, effectively reducing the rolling friction between the rolling elements and the second retaining wall 32 during rotation. Preferably, in both of the above embodiments, the second retaining wall 32 may further be provided with a plurality of second oil-passing grooves 321 arranged at equal intervals along the length direction of the window beam 3 , thereby improving the floating effect of the rolling body.

[0042] The present application provides a tapered roller bearing comprising the tapered roller bearing retainer 10 described above. For example, the tapered roller bearing may further comprise an inner ring, an outer ring, and a plurality of rolling elements. The tapered roller bearing retainer 10 is disposed between the inner and outer rings and positions the rolling elements. Equipped with the tapered roller bearing retainer 10 described in the above embodiments, the tapered roller bearing of the present application effectively reduces friction, wear, noise, high heat, and vibration issues encountered during operation, significantly extending its service life.

[0043] The tapered roller bearing provided in the present application includes the tapered roller bearing retainer 10 as described above. Therefore, the beneficial effects of the tapered roller bearing retainer 10 are all included in the tapered roller bearing provided in the present application and will not be described in detail here.

[0044] Anything not described in this application can be achieved by adopting or drawing on existing technologies.

[0045] The various embodiments in this specification are described in a progressive manner, and the same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on the differences from other embodiments.

[0046] The foregoing is merely an embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application should be included within the scope of the claims of the present application.

Claims

1. A tapered roller bearing cage, comprising a large-diameter ring frame and a small-diameter ring frame, wherein the large-diameter ring frame and the small-diameter ring frame are connected by a plurality of window beams, and a window hole for mounting a rolling element of the tapered bearing is formed between two adjacent window beams, characterized in that: Among the two window beams used to form any window hole, one is provided with a first retaining wall facing the window hole, and the other is provided with a second retaining wall facing the window hole, the first retaining wall and the second retaining wall resist and limit the rolling body installed in the window hole, the first retaining wall is provided with a first oil passage groove, and the second retaining wall is provided with a second oil passage groove, the first oil passage groove and the second oil passage groove extend along the inward and outward directions of the tapered roller bearing retainer; along the direction from the outer side to the inner side of the tapered roller bearing retainer, the first oil passage groove is configured as a structure with gradually decreasing width.

2. The tapered roller bearing retainer according to claim 1, characterized in that: The first oil passage groove is configured as an isosceles trapezoidal structure, and the small end opening and the large end opening of the first oil passage groove both extend along the length direction of the window beam.

3. The tapered roller bearing retainer according to claim 2, characterized in that: The ratio of the width dimension L1 of the small end opening to the width dimension L2 of the large end opening of the first oil passage groove is not greater than 0.

6.

4. The tapered roller bearing cage according to claim 1, characterized in that: Along the length direction of the window beam, the first retaining wall is provided with a plurality of the first oil-passing grooves arranged at equal intervals.

5. The tapered roller bearing cage according to claim 1, characterized in that: Along the direction from the outer side to the inner side of the tapered roller bearing retainer, the first oil groove is configured as a structure with a gradually decreasing depth.

6. The tapered roller bearing retainer according to claim 1, wherein: The second oil passage trough is configured as a rectangular structure.

7. The tapered roller bearing cage according to claim 1, characterized in that: Along the direction from the inner side of the tapered roller bearing retainer to the outer side, the second oil groove is configured as a structure with a gradually decreasing width.

8. The tapered roller bearing cage according to claim 6 or 7, characterized in that: Along the length direction of the window beam, the second retaining wall is provided with a plurality of second oil passage grooves arranged at equal intervals.

9. A tapered roller bearing, characterized in that: The tapered roller bearing comprises a retainer according to any one of claims 1 to 8.

Images