Tapered roller bearing with high load capacity

Abstract

The utility model provides a tapered roller bearing with high load capacity, which comprises an outer ring, an inner ring, a rolling body and a retainer, and is characterized in that the inner ring is provided with a large flange and an inner raceway, one end of the inner raceway is propped against the large flange, and the other end of the inner raceway penetrates through the small end surface of the inner ring; the length of the rolling bodies and the bearing area of the rolling bodies and the inner and outer rings are increased by eliminating the small flanges and prolonging the inner raceway, so that the bearing capacity of the tapered roller bearing is improved, meanwhile, the size of the retainer is increased, the retainer can accommodate more rolling bodies, the bearing capacity of the tapered roller bearing is further improved, and the service life of the tapered roller bearing is prolonged. The technical problem that the bearing capacity of a bearing is insufficient under the limitation of a fixed installation space in the prior art is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of bearings, in particular to a high-load capacity tapered roller bearing. Background Art

[0002] As a member of rolling bearings, tapered roller bearings are usually composed of four major parts: outer ring, inner ring, roller, and cage. The conventional structure is that the outer ring has no ribs, and the inner ring has two large and small ribs. When the bearing is running, the large end of the roller presses against the large rib, which guides the roller and gives the large end of the roller a reaction force to make it run stably. There is a gap between the small rib and the small end of the roller, and the small rib is not subjected to force. Due to the structural characteristics of tapered roller bearings, it has the advantages of being able to withstand radial and axial combined loads, high load-bearing capacity, good rigidity, and easy installation and maintenance. It is widely used in equipment in weapons, automobiles, high-speed railways, engineering, mining and other industries.

[0003] With the upgrading and transformation of equipment, its load-bearing bearings are required to bear greater loads while keeping the original installation space unchanged, so as to improve the reliability coefficient of the equipment. Under the same external dimensions, the load-bearing capacity of ball bearings is far inferior to that of roller bearings; other roller bearings such as cylindrical roller bearings and spherical roller bearings cannot meet the load or speed requirements; therefore, it is necessary to optimize the internal design and improve the bearing load-bearing capacity while keeping the original tapered roller bearing structure unchanged. Utility Model Content

[0004] The purpose of the utility model is to provide a high load capacity tapered roller bearing in view of the deficiencies in the prior art, which increases the length of the rolling element and the bearing area of ​​the rolling element and the inner and outer rings by eliminating the small rib and extending the inner raceway, thereby improving the load capacity of the tapered roller bearing. At the same time, the size of the retaining frame is increased so that the retaining frame can accommodate more rolling elements, further improving the load capacity of the tapered roller bearing, and solving the technical problem of insufficient bearing capacity of the bearing under the limitation of fixed installation space in the prior art.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A high load capacity tapered roller bearing comprises an outer ring, an inner ring, rolling elements and a retaining frame, wherein the inner ring is provided with a large rib and an inner raceway, one end of the inner raceway abuts against the large rib and the other end penetrates the small end face of the inner ring.

[0007] As an improvement, the rolling body is in a truncated cone shape, and its length is matched with the length of the inner raceway.

[0008] As an improvement, a distance is left between the outer diameter surface of the retainer and the raceway surface of the outer ring, and a distance H is left between the maximum outer diameter D of the retainer and the outer raceway.

[0009] As an improvement, the distance H is less than 1.5 mm.

[0010] As an improvement, the retaining frame is provided with a plurality of window holes for accommodating rolling bodies, and the retaining frame width between two adjacent window holes is the lintel width W.

[0011] As an improvement, the number of the window holes is the number of window holes opened on the retaining frame when the lintel width W is a constant value.

[0012] As an improvement, the number of the rolling bodies and the number of the window holes are arranged in one-to-one correspondence.

[0013] As an improvement, the number of the rolling elements is matched with the maximum number of rolling elements that can be accommodated by the size of the retaining rack.

[0014] As an improvement, the number of the rolling elements is increased by 1-3.

[0015] As an improvement, the rated load of the tapered roller bearing is increased by more than 8%.

[0016] The beneficial effects of the utility model are:

[0017] (1) The utility model increases the length of the rolling element by removing the small rib and extending the inner raceway, thereby improving the load-bearing capacity of the tapered roller bearing.

[0018] (2) The utility model improves the capacity of the cage to accommodate rolling elements by moving the center diameter of the cage outward, thereby increasing the number of rolling elements and further improving the bearing capacity of the bearing while keeping the cage crossbeam width W unchanged.

[0019] In summary, the utility model has the advantage of greatly improving the bearing capacity of the bearing under the condition of fixed installation space. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic cross-sectional view of the structure of a tapered roller bearing in the prior art;

[0021] Figure 2 It is a schematic cross-sectional view of the overall structure of the utility model. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] In the description of the present utility model, 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" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the equipment or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0024] Embodiment 1

[0025] like Figure 1 As shown, the inner ring of the existing tapered roller bearing includes a large rib 21 and a small rib 24. The rolling body is rotatably arranged on the inner raceway between the large rib and the small rib. The center of the cage is generally arranged on the outside of the center of the rolling body. The cage width between two adjacent rolling bodies is called the cage beam width W. The cage beam width W can maintain the rigidity of the cage.

[0026] like Figure 2 As shown, this embodiment provides a high load capacity tapered roller bearing, comprising an outer ring 1, an inner ring 2, rolling elements 3 and a retaining frame 4, wherein the inner ring 2 is provided with a large rib 21 and an inner raceway 22, one end of the outer raceway 22 abuts against the large rib 21, and the other end penetrates the small end face 23 of the inner ring 2; the inner diameter face of the outer ring 1 is provided with an outer raceway 11;

[0027] It should be noted that by eliminating the small rib 24 in the inner ring 2 of the traditional standard tapered roller bearing and extending the inner raceway 22 to the small end face 23, the length of the inner raceway 22 is increased to accommodate the increase in the length of the rolling element 3, thereby improving the load-bearing capacity of the rolling element 3.

[0028] Preferably, the rolling body 3 is truncated cone-shaped, and its length is matched with the length of the outer raceway 22; that is, one end of the rolling body 3 is against the inner side of the large rib 21, and the other end is arranged close to the small end face 23. Under the premise of ensuring that the original size, assembly height and other conditions of the tapered roller bearing remain unchanged, the rolling body 3 adopts the maximum length to improve the load-bearing capacity of the tapered roller bearing.

[0029] Preferably, there is a gap between the outer diameter surface of the retaining frame 4 and the outer raceway 11 surface of the outer ring 1 , and the distance H between the maximum outer diameter D of the retaining frame 4 and the outer raceway 11 is.

[0030] Furthermore, the distance H is less than 1.5 mm.

[0031] It should be noted that by reducing the distance H, the diameter of the retaining frame 4 is increased, and then the circumference of the retaining frame 4 is increased. When the diameter of the rolling body 3 remains unchanged, the retaining frame 4 has more space to accommodate the rolling body 3. By increasing the number of rolling bodies 3, the bearing capacity of the bearing is improved.

[0032] Under the premise of increasing the number of rolling elements, it is necessary to ensure that the width W of the cage beam remains unchanged, so as to ensure the rigidity of the cage. After increasing the number of rolling elements, the spacing L between adjacent rolling elements decreases and the outer diameter of the cage increases, ensuring that the width W of the cage beam remains unchanged.

[0033] Furthermore, the number of the rolling elements 3 is matched with the maximum number of rolling elements 3 that can be accommodated by the size of the retaining frame 4 .

[0034] It should be noted that by increasing the outer diameter of the retainer 4 and thereby increasing the circumferential space of the retainer 4, 1-3 more rollers of the same size can be accommodated, thereby increasing the load of the tapered roller bearing while the assembly dimensions of the tapered roller bearing remain unchanged.

[0035] Preferably, the number of the rolling elements 3 is increased by 1-3.

[0036] Furthermore, the rated load of the tapered roller bearing is increased by more than 8%; by eliminating the small rib 24 of the inner ring 2, increasing the length of the inner raceway 22, increasing the length K of the rolling body 3 and increasing the number of rollers, the rated load of the tapered roller bearing is increased at the same time.

[0037] Taking the tapered roller bearing 30305 as an example, by eliminating the small rib 24, the length of the raceway 22 of the inner ring 2 is increased from 11.8 mm to 13.1 mm;

[0038] The diameter of the cage 4 is increased, so that the distance H is reduced from 1.6 mm of the standard part to 1.2 mm, and the diameter of the cage 4 is increased by 0.76 mm, thereby increasing the circumferential space of the cage 4;

[0039] At the same time, the number of rolling elements 3 is increased from 13 to 14. Finally, the bearing load is increased by 10.8%.

[0040] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A high load capacity tapered roller bearing, comprising an outer ring, an inner ring, rolling elements and a cage, characterized in that: The inner ring is provided with a large rib and an inner raceway, one end of the inner raceway abuts against the large rib, and the other end penetrates the small end face of the inner ring; The rolling body is in the shape of a truncated cone, and its length is matched with the length of the outer raceway; A minimum distance H between the outer diameter surface of the retainer and the raceway surface of the outer ring, the distance H being less than 1.5 mm; The retaining frame is provided with a plurality of window holes for accommodating rolling elements, and the distance between two adjacent window holes is the lintel width W; The number of the window holes is the number of window holes allowed to be opened on the cage when the lintel width W is a fixed value; The number of the rolling bodies is arranged in one-to-one correspondence with the number of the window holes.

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