Tensioning wheel bearing

Abstract

The utility model relates to the technical field of bearings, in particular to a tensioning wheel bearing which comprises a bearing body formed by an outer ring and an inner ring and further comprises an upper shell and a lower shell, and a first clamping groove and a second clamping groove are formed in the side wall, away from the inner ring, of the outer ring in the height direction; a first clamping protrusion matched with the first clamping groove is arranged on the upper shell in a protruding mode, and a second clamping protrusion matched with the second clamping groove is arranged on the lower shell in a protruding mode. The tensioning wheel bearing has the effect of reducing deformation during installation of the upper shell and the lower shell of the tensioning wheel bearing.

Description

Technical Field

[0001] The present application relates to the technical field of bearings, and in particular to a tensioning wheel bearing. Background Art

[0002] With the continuous development of the current industry, the automobile industry is developing rapidly, and there have been great progress in the research and production of automobile bearings. The tensioner bearing is a commonly used automobile bearing.

[0003] As shown in the Chinese utility model with announcement number CN202251824U, the tensioner bearing includes an inner ring and an outer ring of the bearing, between which there are steel balls and a retaining frame for supporting the steel balls, and on the outside of the bearing body there are upper and lower shells, both shells are bent to form connecting strips abutting each other, and the two shells are riveted at the position of the connecting strips by rivets, and after riveting, the two shells encapsulate the bearing body.

[0004] However, the related technology has the following defects: when the upper shell and the lower shell outside the bearing are fixedly installed by riveting, the shell will be deformed due to the stress of riveting, especially the overall roundness of the shell will be greatly affected, and the tension wheel bearing processed in this way will have great quality problems. Utility Model Content

[0005] In order to reduce the deformation of the upper and lower shells of the tension wheel bearing during installation, the present application provides a tension wheel bearing.

[0006] The present application provides a tension wheel bearing, which adopts the following technical solution:

[0007] A tensioning wheel bearing includes a bearing body formed by an outer ring and an inner ring, and also includes an upper shell and a lower shell. The side wall of the outer ring away from the inner ring is respectively provided with a first clamping groove and a second clamping groove in the height direction, the upper shell has a protrusion provided with a first clamping protrusion that cooperates with the first clamping groove, and the lower shell has a protrusion provided with a second clamping protrusion that cooperates with the second clamping groove.

[0008] In some embodiments, the upper shell is bent to form a first packaging portion, a first mounting portion and a first abutting portion that are perpendicular to each other, and the lower shell is bent to form a second packaging portion, a second mounting portion and a second abutting portion that are perpendicular to each other;

[0009] The first packaging part and the second packaging part correspond to the upper and lower ends of the bearing body for packaging;

[0010] The first clamping protrusion is located on the first mounting portion, the second clamping protrusion is located on the second mounting portion, and both the first mounting portion and the second mounting portion are in contact with the outer ring;

[0011] The first abutting portion and the second abutting portion are clearance-matched with each other.

[0012] In some embodiments, the first clamping groove and the second clamping groove are both annular grooves provided on the side wall of the outer ring, and the first clamping protrusion and the second clamping protrusion are both annular protrusions.

[0013] In some of the embodiments, both the first snap-fit ​​groove and the second snap-fit ​​groove are point-shaped grooves provided on the outer ring side wall, a plurality of the first snap-fit ​​grooves are arranged at intervals at the same height along the inner ring side wall, a plurality of the second snap-fit ​​grooves are arranged at intervals at the same height along the inner ring side wall, and a plurality of the first snap-fit ​​protrusions and the second snap-fit ​​protrusions are provided and are point-shaped protrusions.

[0014] In some embodiments, a plurality of positioning grooves are arranged along a circumference on the first abutting portion, and a plurality of positioning members that cooperate with the positioning grooves are provided on the second abutting portion.

[0015] or,

[0016] The second abutting portion is provided with a plurality of positioning grooves arranged along a circumference, and the first abutting portion is provided with a plurality of positioning members matched and connected with the positioning grooves.

[0017] In some embodiments, the height of the inner ring is greater than the height of the outer ring, and the distance between the outer end surface of the first packaging portion and the outer end surface of the second packaging portion is equal to the height of the outer ring.

[0018] In some embodiments, both the first packaging portion and the second packaging portion are clearance-matched with the inner ring side wall.

[0019] In some embodiments, the upper shell and the lower shell are both made of metal.

[0020] The technical solution provided by the embodiments of the present application has the following beneficial effects:

[0021] The housing and the bearing body are connected by snap-fitting, and there is no need to use welding, riveting or other methods that would generate stress during installation, but rather deformation of the housing structure, which has less impact on the housing structure, roundness, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the cross-sectional structure of the tension wheel bearing in the embodiment of the present application.

[0023] Figure 2 yes Figure 1 Schematic diagram of the enlarged structure of part A.

[0024] Figure 3 It is a schematic diagram of the connection between the upper shell, the lower shell and the outer ring in the embodiment of the present application.

[0025] Explanation of the reference numerals: 1. bearing body; 11. outer ring; 111. first snap-fit ​​groove; 112. second snap-fit ​​groove; 12. inner ring; 2. steel ball; 3. retaining frame; 4. sealing ring; 5. upper shell; 51. first snap-fit ​​protrusion; 52. first packaging part; 53. first mounting part; 54. first abutting part; 6. lower shell; 61. second snap-fit ​​protrusion; 62. second packaging part; 63. second mounting part; 64. second abutting part; 7. positioning groove; 8. positioning piece. DETAILED DESCRIPTION

[0026] To more clearly understand the purpose, technical solutions and advantages of the present application, the present application is described and illustrated below in conjunction with the accompanying drawings and embodiments. However, it should be understood by those of ordinary skill in the art that the present application can be implemented without these details. In some cases, in order to avoid unnecessary descriptions that make various aspects of the present application obscure, well-known methods, processes, systems, components and / or circuits that have been described at a higher level will not be described in detail. For those of ordinary skill in the art, it is obvious that various changes can be made to the embodiments disclosed in the present application, and without departing from the principles and scope of the present application, the general principles defined in the present application can be applied to other embodiments and application scenarios. Therefore, the present application is not limited to the embodiments shown, but conforms to the broadest scope consistent with the scope claimed for protection of the present application.

[0027] It should be noted that the description of these embodiments is used to help understand the present invention, but does not constitute a limitation of the present invention. In addition, the technical features involved in each embodiment of the present invention described below can be combined with each other as long as there is no conflict between them.

[0028] In the description of this application, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed", etc. are understood to exclude the number itself, and "above", "below", "within", etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used to distinguish the technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0029] In the description of the present application, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples.

[0030] An embodiment of the present application discloses a tensioning wheel bearing.

[0031] like Figure 1 and Figure 2 As shown, a tensioner bearing comprises a bearing body 1 formed by an outer ring and an inner ring 12 , and further comprises an upper shell 5 and a lower shell 6 .

[0032] There is a gap between the outer ring and the inner ring 12 for installing the retaining frame 3 with the steel balls 2 and the retaining frame 3, and a sealing ring 4 is also installed between the outer ring 11 and the inner ring 12 to seal the gap between the outer ring 11 and the inner ring 12.

[0033] The upper shell 5 and the lower shell 6 in the present application are characterized as two shells for being installed in cooperation on the upper and lower sides of the bearing body 1, wherein "upper" and "lower" are characterized as relative positions, which do not limit the specific positions of the two shells. When the tensioning wheel bearing is placed flat in the horizontal direction, the upper shell 5 can be located above or below.

[0034] The upper shell 5 and the lower shell 6 are both made of metal, which improves the overall rigidity and makes the tension wheel bearing less susceptible to damage during subsequent use.

[0035] There are two layers of grooves on the side wall of the outer ring 11 away from the inner ring 12 along the height direction, namely a first clamping groove 111 and a second clamping groove 112 .

[0036] The upper shell 5 is provided with a first clamping protrusion 51 by bending or spot welding, and the lower shell 6 is provided with a second clamping protrusion 61 by bending or electric welding. In the embodiment of the present application, both the first clamping protrusion 51 and the second clamping protrusion 61 are obtained by bending.

[0037] The first snap-fitting protrusion 51 is matched with the first snap-fitting groove 111, and the second snap-fitting protrusion 61 is matched with the second snap-fitting groove 112. When installing the shell, it is only necessary to sleeve the upper shell 5 and the lower shell 6 on the outer ring 11 and press toward the inner side of the bearing. The first snap-fitting protrusion 51 and the second snap-fitting protrusion 61 will be tightly abutted against the outer ring 11 through interference fit. As the pressing proceeds, the first snap-fitting protrusion 51 and the second snap-fitting protrusion 61 will move to the positions of the first snap-fitting groove 111 and the second snap-fitting groove 112 and realize snap-fitting, thereby realizing the installation of the shell. The two shells cooperate to realize the encapsulation of the bearing body 1.

[0038] In other embodiments, the upper shell 5 is bent to form a first packaging portion 52, a first mounting portion 53 and a first abutting portion 54 that are perpendicular to each other, and the lower shell 6 is bent to form a second packaging portion 62, a second mounting portion 63 and a second abutting portion 64 that are perpendicular to each other.

[0039] The first mounting portion 53 and the second mounting portion 63 are parallel to the side wall of the outer ring 11 , and the first packaging portion 52 , the second packaging portion 62 , the first abutting portion 54 and the second abutting portion 64 are perpendicular to the side wall of the outer ring 11 .

[0040] The first packaging portion 52 and the second packaging portion 62 are located at both ends of the outer ring 11 and the inner ring 12 , mainly corresponding to the gap between the outer ring 11 and the inner ring 12 , and are used to package the bearing body 1 .

[0041] The first clamping protrusion 51 is located on the first mounting portion 53 , the second clamping protrusion 61 is located on the second mounting portion 63 , and the first mounting portion 53 and the second mounting portion 63 abut against the outer ring 11 to achieve fixed installation between the housing and the bearing body 1 .

[0042] The clearance fit between the first abutting portion 54 and the second abutting portion 64 is used for sealing between the housings and for subsequent connection of the tensioning wheel bearing with other components.

[0043] In other embodiments, the first clamping groove 111 and the second clamping groove 112 are continuous annular grooves opened on the side wall of the outer ring 11, and the first clamping protrusion 51 and the second clamping protrusion 61 are continuous annular protrusions. The annular protrusion and the annular groove can increase the contact area between the two and improve the clamping stability.

[0044] In other embodiments, the first clamping groove 111 and the second clamping groove 112 are both dot-shaped grooves, which are characterized as small clamping grooves. A plurality of first clamping grooves 111 and a plurality of second clamping grooves 112 are provided on the side wall of the outer ring 11, and the plurality of first clamping grooves 111 are arranged at intervals and at the same height, and the plurality of second clamping grooves 112 are arranged at intervals and at the same height.

[0045] There are also a plurality of first engaging protrusions 51 and second engaging protrusions 61, and the number and position of the plurality of first engaging protrusions 51 and the plurality of second engaging protrusions 61 correspond to the first engaging grooves 111 and the second engaging grooves 112. The plurality of first engaging protrusions 51 and the plurality of second engaging protrusions 61 are both dot-shaped protrusions.

[0046] Compared with the ring-shaped structure, the point grooves and point protrusions are easier to process, have less impact on the overall shape and rigidity of the shell, and have lower processing costs, but the clamping effect is weaker than the ring-shaped structure.

[0047] In other embodiments, the engaging groove may be arranged in an annular groove, and the engaging protrusion may be arranged as a point-shaped protrusion.

[0048] like Figure 3 As shown, in other embodiments, if the snap-fit ​​groove is an annular groove and the snap-fit ​​protrusion is an annular protrusion, after the shell and the outer ring are installed, because there is no connection in the middle of the annular structure, and the shell and the bearing appearance structure are both annular, the shell can rotate on the outer ring 11. However, in the actual use environment of the bearing, rotation is not allowed between the shell and the bearing body 1, so a positioning structure needs to be provided in this case.

[0049] A plurality of positioning grooves 7 are provided on the first abutting portion 54 along the circumferential direction, and a plurality of positioning members 8 cooperating with the positioning grooves 7 are provided on the second abutting portion 64 .

[0050] or,

[0051] A plurality of positioning grooves 7 are provided on the second abutting portion 64 along the circumferential direction, and a plurality of positioning members 8 cooperating with the positioning grooves 7 are provided on the first abutting portion 54 .

[0052] A snap-fitting mechanism of the positioning groove 7 and the positioning member 8 is provided on the first abutting portion 54 and the second abutting portion 64 , so that when both housings are mounted on the outer ring 11 , the positioning member 8 and the positioning groove 7 cooperate to prevent the housing from rotating with the outer ring 11 .

[0053] There is no restriction on the position and quantity of the positioning member 8 and the positioning groove 7 , as long as the above-mentioned effects are achieved.

[0054] In other embodiments, the height of the inner ring 12 is greater than the height of the outer ring 11 , and the distance between the outer end surface of the first packaging portion 52 and the outer end surface of the second packaging portion 62 is equal to the height of the outer ring 11 .

[0055] In order to prevent a large gap in the height direction between the shell and the inner ring 12 due to the high height of the outer ring 11 after the shell is installed, which would lead to a poor sealing effect, the height of the inner ring 12 needs to be set to be greater than the height of the outer ring 11. In this way, the height of the outer ring 11 plus the thickness of the first packaging part 52 and the second packaging part 62 can make the shell and the inner ring 12 at the same height, thereby improving the overall sealing.

[0056] In other embodiments, the first packaging portion 52 and the second packaging portion 62 are both gap-matched with the side wall of the inner ring 12, so that after the housing is installed, a tight seal is achieved with the inner ring 12 in a direction perpendicular to the height direction.

[0057] The implementation principle is:

[0058] The housing and the bearing body 1 are connected by snap-fitting, and there is no need to use welding, riveting or the like during installation, which would cause stress but deformation of the housing structure, and has less impact on the housing structure, roundness, etc.

[0059] It should be understood that although the steps in the flowchart of the accompanying drawings are shown in sequence according to the instructions of the arrows, these steps are not necessarily performed in the order indicated by the arrows. Unless otherwise clearly stated in this document, the execution of these steps is not strictly limited in order and can be performed in other orders.

[0060] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A tension wheel bearing, comprising a bearing body (1) formed by an outer ring (11) and an inner ring (12), characterized in that: The invention also comprises an upper shell (5) and a lower shell (6); a first snap-fitting groove (111) and a second snap-fitting groove (112) are respectively provided on a side wall of the outer ring (11) away from the inner ring (12) in a height direction; a first snap-fitting groove (51) is provided on a protrusion on the upper shell (5) to cooperate with the first snap-fitting groove (111); and a second snap-fitting groove (61) is provided on a protrusion on the lower shell (6) to cooperate with the second snap-fitting groove (112).

2. The tension wheel bearing according to claim 1, characterized in that: The upper shell (5) is bent to form a first packaging portion (52), a first mounting portion (53) and a first abutting portion (54) which are perpendicular to each other, and the lower shell (6) is bent to form a second packaging portion (62), a second mounting portion (63) and a second abutting portion (64) which are perpendicular to each other; The first packaging portion (52) and the second packaging portion (62) correspond to upper and lower ends of the bearing body (1) for packaging; The first clamping protrusion (51) is located on the first mounting portion (53), the second clamping protrusion (61) is located on the second mounting portion (63), and the first mounting portion (53) and the second mounting portion (63) are both in contact with the outer ring (11); The first abutting portion (54) and the second abutting portion (64) are clearance-matched with each other.

3. The tension wheel bearing according to claim 2, characterized in that: The first clamping groove (111) and the second clamping groove (112) are both annular grooves formed on the side wall of the outer ring (11), and the first clamping protrusion (51) and the second clamping protrusion (61) are both annular protrusions.

4. The tension wheel bearing according to claim 2, characterized in that: The first engaging groove (111) and the second engaging groove (112) are both point-shaped grooves provided on the side wall of the outer ring (11); a plurality of the first engaging grooves (111) are arranged at intervals at the same height along the side wall of the inner ring (12); a plurality of the second engaging grooves (112) are arranged at intervals at the same height along the side wall of the inner ring (12); and a plurality of the first engaging protrusions (51) and the second engaging protrusions (61) are provided and are point-shaped protrusions.

5. The tension wheel bearing according to claim 3, characterized in that: The first abutting portion (54) is provided with a plurality of positioning grooves (7) arranged along a circumference, and the second abutting portion (64) is provided with a plurality of positioning members (8) that cooperate with the positioning grooves (7). or, The second abutting portion (64) is provided with a plurality of positioning grooves (7) arranged along a circumference, and the first abutting portion (54) is provided with a plurality of positioning members (8) that are matched and connected to the positioning grooves (7).

6. The tension wheel bearing according to claim 2, characterized in that: The height of the inner ring (12) is greater than the height of the outer ring (11), and the distance between the outer end surface of the first packaging portion (52) and the outer end surface of the second packaging portion (62) is equal to the height of the outer ring (11).

7. The tension wheel bearing according to claim 2, characterized in that: The first packaging portion (52) and the second packaging portion (62) are both clearance-matched with the side wall of the inner ring (12).

8. The tension wheel bearing according to claim 1, characterized in that: The upper shell (5) and the lower shell (6) are both made of metal.

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