Combination bearing

Abstract

The utility model provides a combined bearing which comprises an outer ring and an inner ring, and the outer ring is arranged on the inner ring; a first roller path and a second roller path are arranged on the outer ring, a third roller path corresponding to the first roller path is arranged on the inner ring, and a fourth roller path corresponding to the second roller path is arranged on the inner ring; the first roller path and the third roller path form a straight roller path, and the second roller path and the fourth roller path form a groove R roller path; a cylindrical roller is arranged in the straight raceway, and an angular contact ball is arranged in the groove R raceway. The combined bearing provided by the utility model not only has the high-speed rotation capability of the cylindrical roller bearing and the angular contact ball bearing, but also has the capability that the cylindrical roller bearing can bear a large radial load and the angular contact ball bearing can bear a one-way axial load.

Description

Technical Field

[0001] The utility model relates to the technical field of bearings, in particular to a combined bearing, in particular to a high-load and high-speed combined rolling bearing. Background Art

[0002] The bearings used in the existing operating mechanism are generally used in the transmission mechanism of the operating mechanism and are important moving mechanism parts. Due to the working conditions, they may need to bear large radial loads and unidirectional axial loads, and have certain high speed requirements. The existing method is to install a set of cylindrical roller bearings and a set of angular contact ball bearings at the same time, but due to size limitations, this cannot be adopted. Even if there is enough space, installing two sets of bearings at the same time will still cause the problem of different assembly heights, which requires grinding and adjustment, and the installation process is relatively complicated. In order to solve this problem, this application adopts a combined bearing structure. Utility Model Content

[0003] In view of the defects in the prior art, the purpose of the utility model is to provide a combined bearing.

[0004] A combined bearing provided according to the utility model comprises: an outer ring and an inner ring, wherein the outer ring is arranged on the inner ring;

[0005] The outer ring is provided with a first raceway and a second raceway, the inner ring is provided with a third raceway corresponding to the first raceway, and the inner ring is provided with a fourth raceway corresponding to the second raceway;

[0006] The first raceway and the third raceway constitute a straight raceway, and the second raceway and the fourth raceway constitute a groove R raceway; cylindrical rollers are arranged in the straight raceway, and angular contact balls are arranged in the groove R raceway.

[0007] Preferably, the cylindrical rollers in the straight raceway are of a full roller structure.

[0008] Preferably, the angular contact balls in the raceway of the groove R are full ball structures.

[0009] Preferably, a locking structure is provided on the inner ring, and the outer ring and the inner ring are connected and fixed by the locking structure.

[0010] Preferably, the outer ring includes an outer ring of a cylindrical roller bearing and an outer ring of an angular contact ball bearing that are integrally formed;

[0011] The first raceway is arranged on the outer ring of the cylindrical roller bearing, and the second raceway is arranged on the outer ring of the angular contact ball bearing;

[0012] The inner ring includes an inner ring of a cylindrical roller bearing and an inner ring of an angular contact ball bearing which are integrally formed;

[0013] The third raceway is arranged on the inner ring of the cylindrical roller bearing, and the fourth raceway is arranged on the inner ring of the angular contact ball bearing.

[0014] Preferably, the cylindrical roller bearing outer ring, the cylindrical roller bearing inner ring and the cylindrical roller constitute a cylindrical roller bearing structure;

[0015] The angular contact ball bearing outer ring, the angular contact ball bearing inner ring and the angular contact balls constitute an angular contact ball bearing structure.

[0016] Preferably, the ratio of the diameter of the cylindrical roller to the difference between the outer diameter of the outer ring and the inner diameter of the inner ring is 0.24 to 0.28.

[0017] Preferably, the ratio of the diameter of the angular contact ball to the diameter of the second raceway is 0.525, and the ratio of the diameter of the angular contact ball to the diameter of the fourth raceway is 0.515.

[0018] Compared with the prior art, the utility model has the following beneficial effects:

[0019] 1. The combined bearing of the utility model has both a cylindrical roller bearing structure and an angular contact ball bearing structure. It has the high-speed rotation capability of cylindrical roller bearings and angular contact ball bearings, and the ability of cylindrical roller bearings to withstand large radial loads and angular contact ball bearings to withstand unidirectional axial loads.

[0020] 2. The combined bearing of the utility model can replace the original combination of a set of cylindrical roller bearings and a set of angular contact ball bearings, making the structure more compact and can be used in occasions with limited space. The combined bearing adopts a full ball structure, and the bearing load capacity is higher than the combined structure of a set of cylindrical roller bearings and a set of angular contact ball bearings.

[0021] 3. The combined bearing of the utility model combines the outer ring end face of the cylindrical roller bearing with the stress-bearing end face of the outer ring of the angular contact ball bearing, and combines the inner ring end face of the cylindrical roller bearing with the non-stress-bearing end face (locking face) of the inner ring of the angular contact ball bearing. Since the cylindrical roller bearing is of the separable inner ring type, and the angular contact ball bearing is of the inseparable inner and outer ring type, after the two structures are combined, the entire bearing also becomes an inseparable integral structure through the setting of the inner ring lock, which will not be easily separated. Compared with the original combined design, it is easier to install and use. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Other features, objects and advantages of the present invention will become more apparent by reading the detailed description of non-limiting embodiments with reference to the following drawings:

[0023] Figure 1 It is a schematic diagram of the plane structure of the combined bearing;

[0024] Figure 2 It is a schematic diagram of the cross-sectional structure of the combined bearing;

[0025] Figure 3 Schematic diagram of the cross-sectional structure of the outer ring;

[0026] Figure 4 It is a schematic diagram of the cross-sectional structure of the inner ring;

[0027] Figure 5 A schematic diagram showing the structure of the lock.

[0028] The figure shows:

[0029] Outer ring 1 Cylindrical roller bearing inner ring 203

[0030] First raceway 101 Angular contact ball bearing inner ring 204

[0031] Second raceway 102 Straight raceway 3

[0032] Cylindrical roller bearing outer ring 103 groove R raceway 4

[0033] Angular contact ball bearing outer ring 104 Cylindrical roller 5

[0034] Inner ring 2 Angular contact ball 6

[0035] Third rolling track 201 Locking structure 7

[0036] Fourth raceway 202 DETAILED DESCRIPTION

[0037] The utility model is described in detail below in conjunction with specific embodiments. The following embodiments will help those skilled in the art to further understand the utility model, but do not limit the utility model in any form. It should be pointed out that for those of ordinary skill in the art, several changes and improvements can be made without departing from the concept of the utility model. These all belong to the protection scope of the utility model.

[0038] Embodiment 1:

[0039] like Figures 1 to 5 As shown, this embodiment provides a combined bearing, including: an outer ring 1 and an inner ring 2, the outer ring 1 is arranged on the inner ring 2; a first raceway 101 and a second raceway 102 are arranged on the outer ring 1, a third raceway 201 is arranged on the inner ring 2 corresponding to the first raceway 101, and a fourth raceway 202 is arranged on the inner ring 2 corresponding to the second raceway 102; the first raceway 101 and the third raceway 201 constitute a straight raceway 3, and the second raceway 102 and the fourth raceway 202 constitute a groove R raceway 4; a cylindrical roller 5 is arranged in the straight raceway 3, and an angular contact ball 6 is arranged in the groove R raceway 4.

[0040] The ratio of the diameter of the cylindrical roller 5 to the difference between the outer diameter of the outer ring and the inner diameter of the inner ring is 0.24-0.28, the ratio of the angular contact ball to the second raceway 102 is 0.525, and the ratio of the angular contact ball to the fourth raceway 202 is 0.515.

[0041] The bearing accuracy grade is generally specified according to the P6 grade requirements, and when there are higher requirements, it shall be implemented according to the P5 grade requirements.

[0042] The outer ring 1 includes an integral cylindrical roller bearing outer ring 103 and an angular contact ball bearing outer ring 104; the first raceway 101 is arranged on the cylindrical roller bearing outer ring 103, and the second raceway 102 is arranged on the angular contact ball bearing outer ring 104; the inner ring 2 includes an integral cylindrical roller bearing inner ring 203 and an angular contact ball bearing inner ring 204; the third raceway 201 is arranged on the cylindrical roller bearing inner ring 203, and the fourth raceway 202 is arranged on the angular contact ball bearing inner ring 204. The cylindrical roller bearing outer ring 101, the cylindrical roller bearing inner ring 201 and the cylindrical roller 7 constitute a cylindrical roller bearing structure; the angular contact ball bearing outer ring 102, the angular contact ball bearing inner ring 202 and the angular contact ball 8 constitute an angular contact ball bearing structure.

[0043] The inner ring 2 is provided with a locking structure 7 for the angular contact ball bearing. By controlling the inner ring locking height H, the outer ring 1, inner ring 2 and steel ball can be integrated into a whole by heat-fitting, but the bearing will not be disengaged at room temperature. The outer ring 1 and the inner ring 2 are connected and fixed by the locking structure 7. The cylindrical roller 5 in the straight raceway 3 is a full roller structure. The angular contact ball 6 in the groove R raceway 4 is a full ball structure.

[0044] The combined bearing of this embodiment can replace the combined installation structure of cylindrical roller bearings and angular contact ball bearings, making the bearing installation space structure more compact and convenient. The combined bearing of this embodiment can rotate at high speed and withstand large radial loads and unidirectional axial loads at the same time, and its load-bearing capacity is higher than that of the original combined structure. The combined bearing of this embodiment has the high-speed rotation ability of cylindrical roller bearings and angular contact ball bearings, and has the ability of cylindrical roller bearings to withstand large radial loads and angular contact ball bearings to withstand unidirectional axial loads.

[0045] Embodiment 2:

[0046] Those skilled in the art may understand this embodiment as a more specific description of Embodiment 1.

[0047] like Figure 1 and Figure 2 This embodiment provides a high-load and high-speed combined rolling bearing, which comprises an outer ring 1, an inner ring 2, cylindrical rollers 5 and angular contact balls 6.

[0048] like Figure 3 and Figure 4 As shown, the outer ring 1 has both the straight raceway of the cylindrical roller and the R raceway of the angular contact ball bearing, and the inner ring 2 has both the straight raceway of the cylindrical roller and the R raceway of the angular contact ball bearing. The cylindrical roller 5 adopts a full roller structure, that is, the bearing has no cage, and the angular contact ball 6 adopts a full ball structure, that is, the bearing has no cage

[0049] The combined rolling bearing of this embodiment adopts a structural form in which the inner and outer rings of a cylindrical roller bearing and an angular contact ball bearing are integrated, and adopts a full cylindrical roller and full ball structure.

[0050] The combined rolling bearing of this embodiment can replace the combined installation structure of the cylindrical roller bearing and the angular contact ball bearing, making the bearing installation space structure more compact and convenient.

[0051] The combined rolling bearing of this embodiment can rotate at high speed and bear large radial load and unidirectional axial load at the same time, and its bearing capacity is higher than that of the original combined structure.

[0052] The combined bearing of the utility model has the high-speed rotation capability of the cylindrical roller bearing and the angular contact ball bearing, and also has the capability of the cylindrical roller bearing to bear a large radial load and the capability of the angular contact ball bearing to bear a unidirectional axial load.

[0053] In the description of the present application, it should be understood that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application 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 application.

[0054] The above describes the specific embodiments of the present invention. It should be understood that the present invention is not limited to the above specific embodiments, and those skilled in the art can make various changes or modifications within the scope of the claims, which does not affect the essence of the present invention. In the absence of conflict, the embodiments of the present application and the features in the embodiments can be combined with each other at will.

Claims

1. A combined bearing, characterized in that: include: An outer ring (1) and an inner ring (2), wherein the outer ring (1) is arranged on the inner ring (2); The outer ring (1) is provided with a first raceway (101) and a second raceway (102); the inner ring (2) is provided with a third raceway (201) corresponding to the first raceway (101); and the inner ring (2) is provided with a fourth raceway (202) corresponding to the second raceway (102); The first raceway (101) and the third raceway (201) constitute a straight raceway (3), and the second raceway (102) and the fourth raceway (202) constitute a groove R raceway (4); a cylindrical roller (5) is arranged in the straight raceway (3), and an angular contact ball (6) is arranged in the groove R raceway (4).

2. The combined bearing according to claim 1, characterized in that: The cylindrical rollers (5) in the straight raceway (3) are of a full roller structure.

3. The combined bearing according to claim 1, characterized in that: The angular contact balls (6) in the groove R raceway (4) are of a full ball structure.

4. The combined bearing according to claim 1, characterized in that: The inner ring (2) is provided with a locking structure (7), and the outer ring (1) and the inner ring (2) are connected and fixed via the locking structure (7).

5. The combined bearing according to claim 1, characterized in that: The outer ring (1) comprises a cylindrical roller bearing outer ring (103) and an angular contact ball bearing outer ring (104) which are integrally formed; The first raceway (101) is arranged on the outer ring (103) of the cylindrical roller bearing, and the second raceway (102) is arranged on the outer ring (104) of the angular contact ball bearing; The inner ring (2) comprises a cylindrical roller bearing inner ring (203) and an angular contact ball bearing inner ring (204) which are integrally formed; The third raceway (201) is arranged on the inner ring (203) of the cylindrical roller bearing, and the fourth raceway (202) is arranged on the inner ring (204) of the angular contact ball bearing.

6. The combined bearing according to claim 5, characterized in that: The cylindrical roller bearing outer ring (103), the cylindrical roller bearing inner ring (203) and the cylindrical roller (5) constitute a cylindrical roller bearing structure; The angular contact ball bearing outer ring (104), the angular contact ball bearing inner ring (204) and the angular contact ball (6) constitute an angular contact ball bearing structure.

7. The combined bearing according to claim 1, characterized in that: The ratio of the diameter of the cylindrical roller (5) to the difference between the outer diameter of the outer ring and the inner diameter of the inner ring is 0.24 to 0.

28.

8. The combined bearing according to claim 1, characterized in that: The ratio of the diameter of the angular contact ball (6) to the diameter of the second raceway (102) is 0.525, and the ratio of the diameter of the angular contact ball (6) to the diameter of the fourth raceway (202) is 0.515.

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