Composite bearing with double rolling bodies

Abstract

The utility model provides a composite bearing with double rolling bodies, which can solve the problems that a transmission system is difficult to arrange and the structural coordination of the transmission system is influenced due to large local structure and large occupied design space when a radial bearing and a thrust bearing are combined to bear larger radial and axial loads. The bearing comprises an outer ring, an inner ring, a retainer, a first snap ring, a second snap ring and a plurality of composite rolling bodies, one end of the outer ring is provided with a first retaining shoulder, the inner side of the other end of the outer ring is provided with a first snap ring groove for mounting the first snap ring, one end of the inner ring is provided with a second retaining shoulder, and the outer side of the other end of the inner ring is provided with a second snap ring groove for mounting the second snap ring. A first cylindrical surface roller path, a second cylindrical surface roller path and a concave surface roller path are arranged between the inner side of the outer ring and the outer side of the inner ring, each composite rolling body is composed of two cylindrical rollers and a spherical roller, and the two cylindrical rollers and the two spherical rollers are matched with the first cylindrical surface roller path, the second cylindrical surface roller path and the concave surface roller path respectively; and the retainer is provided with a limiting hole for mounting the composite rolling body.

Description

Technical Field

[0001] The utility model relates to a bearing, in particular to a double-type rolling element composite bearing. Background Art

[0002] Bearings are mainly classified into roller bearings and ball bearings according to the rolling elements, and are mainly classified into radial bearings and thrust bearings according to the loads they bear. Common bearings mainly bear radial loads or axial loads, such as cylindrical roller bearings, which are mainly used to bear radial loads, and tapered roller bearings, which are mainly used to bear axial loads. When both radial loads and axial loads are large, radial bearings and thrust bearings are used in combination, such as cylindrical roller bearings and thrust roller bearings. Although this combination can effectively solve the problem of load bearing, it will result in a larger local structure and occupy a larger design space, which will make the structural layout of the transmission system difficult and affect the structural coordination of the transmission system. Therefore, it is necessary to design a composite bearing with a compact structure that can bear both radial loads and axial loads. Utility Model Content

[0003] The purpose of the utility model is to solve the technical problem that when a radial bearing and a thrust bearing combination are used to bear large radial and axial loads, the local structure will be large and a large design space will be occupied, which will make the transmission system structure difficult to arrange and affect the coordination of the transmission system structure, and to provide a dual-type rolling element composite bearing.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A dual-type rolling element composite bearing comprises a coaxially arranged outer ring, an inner ring and a cage arranged between the outer ring and the inner ring; the special features thereof are:

[0006] Also includes a first snap ring, a second snap ring and a plurality of composite rolling elements;

[0007] One end of the outer ring extends inwardly along the circumferential direction with a first shoulder, and the inner side of the other end is provided with a first snap ring groove along the circumferential direction; the first snap ring is installed in the first snap ring groove; the end of the inner ring away from the first shoulder extends outwardly along the circumferential direction, and the outer side of the other end is provided with a second snap ring groove along the circumferential direction; the second snap ring is installed in the second snap ring groove; a first cylindrical raceway is provided between the inner side of one end close to the outer ring and the outer side of the inner ring, and a second cylindrical raceway is provided between the inner side of the other end close to the outer ring and the outer side of the inner ring, and the inner diameter and outer diameter of the first cylindrical raceway are both smaller than the second The inner diameter and outer diameter of the cylindrical raceway; a concave raceway is arranged between the outer ring and the inner ring and is located between the first cylindrical raceway and the second cylindrical raceway; each of the composite rolling elements is respectively composed of a cylindrical roller located in the first cylindrical raceway and the second cylindrical raceway, and a spherical roller located in the concave raceway; a plurality of limiting holes are arranged on the retaining frame, and a plurality of composite rolling elements are respectively arranged in the plurality of limiting holes; the cylindrical roller cooperates with the first cylindrical raceway and the second cylindrical raceway, and the spherical roller cooperates with the concave raceway in rolling, and is axially limited between the first shoulder and the second shoulder.

[0008] Furthermore, it also includes a first retaining ring and a second retaining ring; the first retaining ring is arranged between the cylindrical roller located in the second cylindrical raceway and the first retaining ring, and the two sides are respectively abutted against the cylindrical roller and the first retaining ring located in the second cylindrical raceway; the second retaining ring is arranged between the cylindrical roller and the second retaining ring located in the first cylindrical raceway, and the two sides are respectively abutted against the cylindrical roller and the second retaining ring located in the first cylindrical raceway.

[0009] Furthermore, one end of the cylindrical roller is provided with a concave spherical surface, which faces one side of the spherical roller; each of the spherical rollers is located between two corresponding concave spherical surfaces; and the other end of the cylindrical roller abuts against the first shoulder or the second shoulder.

[0010] Furthermore, the spherical radius of the concave spherical surface is greater than the radius of the spherical roller; and the diameter of the spherical roller is greater than the diameter of the cylindrical roller.

[0011] Furthermore, the plurality of limiting holes are evenly arranged on the retaining frame.

[0012] Furthermore, the retaining frame is a stamped retaining frame.

[0013] Beneficial effects of the utility model:

[0014] 1. The utility model provides a dual-type rolling element composite bearing, which can achieve the effect of combining the radial bearing's function of bearing radial load and the thrust bearing's function of bearing axial load by optimizing the layout structure, using cylindrical rollers to match the first cylindrical raceway and the second cylindrical raceway, and spherical rollers to roll with the concave raceway. The composite bearing has a compact overall structure, can withstand large radial and axial forces, can better meet the use needs of bearings under special working conditions, is more conducive to saving space, is convenient for the layout of the transmission system, and will not affect the structural coordination of the transmission system.

[0015] 2. The first retaining ring and the second retaining ring in the utility model are more conducive to the limiting of the composite rolling body. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a cross-sectional view of an embodiment of a dual-type rolling element composite bearing of the utility model;

[0017] Figure 2 yes Figure 1 A partial enlarged view of

[0018] Figure 3 It is a three-dimensional structural schematic diagram of a retainer in an embodiment of the utility model;

[0019] Figure 4 It is a schematic diagram of the three-dimensional structure of a cylindrical roller in an embodiment of the utility model;

[0020] Figure 5 It is an isometric view of an embodiment of the utility model.

[0021] Description of reference numerals:

[0022] 1-outer ring, 2-inner ring, 3-cage, 30-limiting hole, 4-cylindrical roller, 41-concave spherical surface, 5-spherical roller, 6-first retaining ring, 7-first retaining ring, 8-second retaining ring, 9-second retaining ring, 10-compound rolling element, 11-first retaining shoulder, 12-second retaining shoulder, 13-first cylindrical raceway, 14-second cylindrical raceway, 15-concave raceway. DETAILED DESCRIPTION

[0023] 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.

[0024] like Figure 1-Figure 5As shown, a dual-type rolling element composite bearing comprises an outer ring 1 and an inner ring 2 arranged coaxially, a retainer 3 arranged between the outer ring 1 and the inner ring 2, a first retaining ring 7, a second retaining ring 9, a first retaining ring 6 and a second retaining ring 8, and a plurality of composite rolling elements 10. Specifically, a first retaining shoulder 11 is extended inwardly along the circumferential direction at one end of the outer ring 1, a first retaining ring groove is arranged circumferentially on the inner side of the other end, and the first retaining ring 7 is installed in the first retaining ring groove. A second retaining shoulder 12 is extended outwardly along the circumferential direction at one end of the inner ring 2 away from the first retaining shoulder 11, a second retaining ring groove is arranged circumferentially on the outer side of the other end, and the second retaining ring 9 is installed in the second retaining ring groove. A first cylindrical raceway 13 is arranged between the inner side of one end close to the outer ring 1 and the outer side of the inner ring 2, and a second cylindrical raceway 14 is arranged between the inner side of the other end close to the outer ring 1 and the outer side of the inner ring 2. The inner diameter and outer diameter of the first cylindrical raceway 13 are both smaller than the inner diameter and outer diameter of the second cylindrical raceway 14. A concave raceway 15 is arranged between the outer ring 1 and the inner ring 2 and is located between the first cylindrical raceway 13 and the second cylindrical raceway 14. Each composite rolling element 10 is respectively composed of a cylindrical roller 4 located in the first cylindrical raceway 13 and the second cylindrical raceway 14, and a spherical roller 5 located in the concave raceway 15. A plurality of limiting holes 30 are evenly arranged on the retaining frame 3. The plurality of composite rolling elements 10 are respectively arranged in the plurality of limiting holes 30. The cylindrical roller 4 cooperates with the first cylindrical raceway 13 and the second cylindrical raceway 14. The spherical roller 5 rolls with the concave raceway 15. A concave spherical surface 41 is provided at one end of the cylindrical roller 4. The concave spherical surface 41 faces one side of the spherical roller 5. Each spherical roller 5 is respectively located between two corresponding concave spherical surfaces 41. The other end of the cylindrical roller 4 abuts against the first shoulder 11 or the second shoulder 12. The first retaining ring 6 is arranged between the cylindrical roller 4 and the first snap ring 7 in the second cylindrical raceway 14, and the two sides thereof are respectively in contact with the cylindrical roller 4 and the first snap ring 7 in the second cylindrical raceway 14, and the second retaining ring 8 is arranged between the cylindrical roller 4 and the second snap ring 9 in the first cylindrical raceway 13, and the two sides thereof are respectively in contact with the cylindrical roller 4 and the second snap ring 9 in the first cylindrical raceway 13. In this embodiment, the spherical radius of the concave spherical surface 41 is greater than the radius of the spherical roller 5, the diameter of the spherical roller 5 is greater than the diameter of the cylindrical roller 4, the spherical roller 5 is a steel ball, and the retaining frame 3 is a stamped retaining frame.

[0025] The principle of the utility model for bearing radial and axial loads is as follows:

[0026] Generally, the outer ring 1 is installed in the outer housing hole with a transition fit, and the inner ring 2 is installed on the outer transmission shaft with an interference fit. Figure 1As shown, when the bearing is loaded, taking the steel ball as the starting point, the steel ball, the outer ring 1, the inner ring 2 and the retaining frame 3 can form a structure similar to an angular contact ball bearing, the steel ball and the curved raceway 15 roll together, and the cylindrical rollers 4 on both sides can be equivalently regarded as rolling retainers on both sides of the steel ball. At this time, the bearing as a whole can bear a larger axial load; taking the cylindrical roller 4 as the starting point and taking a single cylindrical roller 4 as an example, the cylindrical roller 4, the outer ring 1, the inner ring 2 and the retaining frame 3 can form a structure similar to a cylindrical roller bearing, the cylindrical roller 4 moves on the first cylindrical raceway 13 or the second cylindrical raceway 14, and the steel ball in the middle can be equivalently regarded as a rolling retainer and shoulder of the cylindrical roller 4, and at this time, the bearing can bear a larger radial load; from the overall point of view, the cylindrical roller 4 and the steel ball are retainers for each other, and after being combined with the inner ring 2, the outer ring 1 and the retaining frame 3, they can bear radial loads and axial loads respectively, and the bearing as a whole has better load adaptability and load-bearing capacity than common bearings.

[0027] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any changes or replacements within the technical scope disclosed in the utility model should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A dual-type rolling element composite bearing, comprising an outer ring (1), an inner ring (2) arranged coaxially, and a retaining frame (3) arranged between the outer ring (1) and the inner ring (2); characterized in that: It also includes a first clasp ring (7), a second clasp ring (9) and a plurality of composite rolling elements (10); One end of the outer ring (1) is provided with a first shoulder (11) extending inwardly in the circumferential direction, and the inner side of the other end is provided with a first retaining ring groove in the circumferential direction; the first retaining ring (7) is installed in the first retaining ring groove; the end of the inner ring (2) away from the first shoulder (11) is provided with a second shoulder (12) extending outwardly in the circumferential direction, and the outer side of the other end is provided with a second retaining ring groove in the circumferential direction; the second retaining ring (9) is installed in the second retaining ring groove; a first cylindrical raceway (13) is provided between the inner side of one end close to the outer ring (1) and the outer side of the inner ring (2), and a second cylindrical raceway (14) is provided between the inner side of the other end close to the outer ring (1) and the outer side of the inner ring (2), and the inner diameter and outer diameter of the first cylindrical raceway (13) are both smaller than the inner diameter and outer diameter of the second cylindrical raceway (14); the outer ring ( 1) and an inner ring (2) are provided with a concave raceway (15) located between the first cylindrical raceway (13) and the second cylindrical raceway (14); each of the composite rolling elements (10) is respectively composed of a cylindrical roller (4) located in the first cylindrical raceway (13) and the second cylindrical raceway (14), and a spherical roller (5) located in the concave raceway (15); a plurality of limiting holes (30) are provided on the retaining frame (3), and a plurality of composite rolling elements (10) are respectively arranged in the plurality of limiting holes (30); the cylindrical roller (4) cooperates with the first cylindrical raceway (13) and the second cylindrical raceway (14), and the spherical roller (5) rolls with the concave raceway (15), and is axially limited between the first shoulder (11) and the second shoulder (12).

2. A dual-type rolling element composite bearing according to claim 1, characterized in that: It also includes a first retaining ring (6) and a second retaining ring (8); the first retaining ring (6) is arranged between the cylindrical roller (4) located in the second cylindrical raceway (14) and the first retaining ring (7), and the two sides thereof are respectively in contact with the cylindrical roller (4) located in the second cylindrical raceway (14) and the first retaining ring (7); the second retaining ring (8) is arranged between the cylindrical roller (4) located in the first cylindrical raceway (13) and the second retaining ring (9), and the two sides thereof are respectively in contact with the cylindrical roller (4) located in the first cylindrical raceway (13) and the second retaining ring (9).

3. A dual-type rolling element composite bearing according to claim 1 or 2, characterized in that: One end of the cylindrical roller (4) is provided with a concave spherical surface (41), the concave spherical surface (41) facing one side of the spherical roller (5); each of the spherical rollers (5) is located between two corresponding concave spherical surfaces (41); the other end of the cylindrical roller (4) is in contact with the first stop shoulder (11) or the second stop shoulder (12).

4. A dual-type rolling element composite bearing according to claim 3, characterized in that: The spherical radius of the concave spherical surface (41) is greater than the radius of the spherical roller (5); and the diameter of the spherical roller (5) is greater than the diameter of the cylindrical roller (4).

5. A dual-type rolling element composite bearing according to claim 4, characterized in that: The plurality of limiting holes (30) are evenly arranged on the retaining frame (3).

6. A dual-type rolling element composite bearing according to claim 5, characterized in that: The retaining frame (3) is a stamped retaining frame.

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