Outer positioning bearing

Abstract

The utility model relates to the field of bearings, and particularly discloses an external positioning bearing which comprises an inner ring and an outer ring, an outer ring; the steel ball is arranged between the inner ring and the outer ring; the retainer is arranged on the steel balls; a first concave space is arranged on the outer diameter face of the outer ring, a second concave space is arranged on the end face of the outer ring, the first concave space comprises a radial positioning face, the second concave space comprises an axial positioning face, and the radial positioning face is perpendicular to or parallel to the axial positioning face. The positioning pins are used for being matched with the positioning pins to achieve radial and axial fixing. The bearing seat has the effects that the bearing is directly fixed in the bearing seat, so that the bearing is accurately positioned, the service life is prolonged, and the installation is convenient.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of bearings, in particular to an externally positioned bearing. BACKGROUND

[0002] In use, the bearing is in transition or interference fit with the bearing chamber, and the bearing needs to be pressed into the bearing chamber with a tool. If the installation method or the interference fit tolerance is not selected correctly, the inner and outer rings of the bearing can be eccentric, the bearing clearance can be small, and the running track of the bearing can be offset, thereby causing the bearing to fail.

[0003] If a gap fit is used, the bearing needs to be coated with glue on the outer diameter surface, and the glue can enter the bearing, causing the bearing to fail.

[0004] Patent application No. 200410053381.6 provides a reliable solution to the above problems. The solution is to machine a groove on the outer diameter surface of the bearing, and place a ring with protrusions in the groove. This facilitates processing and has strong versatility. However, when the bearing is placed in the bearing chamber, the protrusions on the ring interfere with the bearing chamber, making it difficult to install. The ring needs to be pressed into the bearing chamber, and the protrusions on the ring need to be in the same plane to ensure the concentricity of the inner and outer rings of the bearing. At the same time, when the interference between the protrusions and the bearing chamber is reduced, the contact area between the outer diameter surface of the bearing and the bearing chamber is small, and the outer ring of the bearing is prone to creep. During this process, impurities can enter the bearing and cause it to fail. CONTENT OF THE UTILITY MODEL

[0005] To improve the fixing effect of the bearing and the bearing seat, the present application provides an externally positioned bearing.

[0006] The externally positioned bearing provided by the present application adopts the following technical solution:

[0007] Comprises:

[0008] An inner ring;

[0009] An outer ring;

[0010] Steel balls arranged between the inner ring and the outer ring;

[0011] A retainer arranged on the steel balls;

[0012] A first concave space is arranged on the outer diameter surface of the outer ring, and a second concave space is arranged on the end surface of the outer ring. The first concave space comprises a radial positioning surface, and the second concave space comprises an axial positioning surface. The radial positioning surface and the axial positioning surface are perpendicular or parallel to each other, and are used to cooperate with positioning pins to realize radial and axial fixation, respectively.

[0013] The bearing is installed in the bearing seat, and then the positioning pin shaft is inserted into the first inner recess space and the second inner recess space. The positioning pin positions and fixes the bearing in the radial and axial directions, avoids creep caused by rotation and movement of the bearing outer ring, reduces the requirements for the outer ring diameter and the bearing end height, reduces the requirements for replacing the bearing in the later period, improves the interchangeability, thereby ensuring the positioning of the bearing, reducing the manufacturing cost of the bearing, and simplifying the structure. The bearing can be applied to various working conditions, is convenient to disassemble and assemble, can ensure normal use of the bearing, and has a long service life. Meanwhile, the bearing can be placed in the bearing chamber without the aid of a clamp, and the bearing does not need to be matched with the bearing chamber. The bearing is positioned in the correct position in the equipment operation through the axial positioning of the outer ring end face and the radial fixing on the outer diameter face, so that the positioning is accurate.

[0014] In a possible implementation, the first inner recess space is a first annular groove, the first annular groove has a flat portion, and the second inner recess space is a groove, and the flat portion is arranged in parallel with the flat surface of the groove.

[0015] In a possible implementation, the first inner recess space is a first hole, the second inner recess space is a second hole, and the axes of the first hole and the second hole are located in the same plane and are perpendicular.

[0016] In a possible implementation, the outer positioning bearing further comprises:

[0017] The dust cover is symmetrically arranged between the outer ring and the inner ring.

[0018] In a possible implementation, the dust cover comprises:

[0019] The first connecting portion is arranged in abutment with the inner ring at one end;

[0020] The second connecting portion is fixedly arranged on the first connecting portion and arranged in abutment with the outer ring at one end.

[0021] In a possible implementation, a second annular groove is arranged on the end face of the inner ring, one end of the first connecting portion is inserted into the second annular groove, and the end face of the second annular groove is arranged in an inclined manner, and the inserted end of the first connecting portion is configured as a first inclined surface.

[0022] In a possible implementation, a convex ring is arranged on the first connecting portion, and one end of the convex ring is arranged in abutment with the end face of the second annular groove.

[0023] In a possible implementation, a second inclined surface is arranged on the convex ring.

[0024] In a possible implementation, a snap ring is arranged on the second connecting portion, a clamping groove is arranged on the outer ring for embedding the snap ring, an arc-shaped groove is formed on the end face of the second connecting portion in a recessed manner, the arc-shaped groove is matched with the end face of the clamping groove, and a gap is formed between the arc-shaped groove and the clamping groove.

[0025] In a possible implementation, one end of the first connecting portion is inwardly recessed to form a third annular groove.

[0026] In summary, the present application includes at least one of the following beneficial technical effects:

[0027] The bearing is installed in the bearing seat, and then the positioning pin shaft is inserted into the first recessed space and the second recessed space. The positioning pin positions and fixes the bearing in the radial and axial directions, avoids the creep caused by the rotation and movement of the bearing outer ring, reduces the requirements for the outer ring diameter and the bearing end height, reduces the requirement for replacing the bearing in the later stage, improves the interchangeability, thereby ensuring the positioning of the bearing, reducing the manufacturing cost of the bearing, simplifying the structure, being applicable to various working conditions, facilitating disassembly and assembly, and ensuring that the bearing can be normally used and has a long service life. At the same time, the bearing can be put into the bearing chamber without the aid of a clamp, and the bearing does not need to be matched with the bearing chamber. Through the axial positioning of the outer ring end face and the radial fixing on the outer diameter face, the bearing is located in the correct position during the operation of the equipment, thereby ensuring the positioning accuracy. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 is a schematic diagram of the overall structure of an embodiment of the present application;

[0029] Figure 2 is a schematic diagram of the overall structure of an embodiment of the present application, mainly showing the mounting structure of the bearing and the bearing seat;

[0030] Figure 3 is a schematic diagram of the overall structure of another embodiment of the present application, mainly showing the first hole and the second hole;

[0031] Figure 4 is Figure 1 is an enlarged schematic diagram of part A in FIG. 7;

[0032] Figure 5 is Figure 4 is an enlarged schematic diagram of part B in FIG. 7;

[0033] Figure 6 is Figure 4 is an enlarged schematic diagram of part C in FIG. 7.

[0034] Reference signs: 1, inner ring; 2, outer ring; 3, steel ball; 4, retainer; 5, dust cover; 6, first annular groove; 7, flat portion; 8, groove; 9, first hole; 10, second hole; 11, first connecting portion; 12, second connecting portion; 13, second annular groove; 14, first inclined surface; 15, protruding ring; 16, second inclined surface; 17, snap ring; 18, clamping groove; 19, arc-shaped groove; 20, third annular groove; 21, bearing seat; 22, positioning pin. DETAILED DESCRIPTION

[0035] The following will be described in combination with the drawingsFigures 1-6 The present application is described in further detail.

[0036] First, those skilled in the art should understand that the embodiments are only used to explain the technical principles of the embodiments of the present application, and are not intended to limit the protection scope of the embodiments of the present application. Those skilled in the art can adjust them as needed in order to adapt to specific application occasions.

[0037] In the description of the embodiments of the present application, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected", "connected" should be understood in a broad sense, for example, can be fixedly connected, can also be detachably connected, or integrally connected; can be mechanically connected, can also be electrically connected; can be directly connected, or indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0038] In the embodiments of the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0039] Reference Figures 1-6: outer positioning bearing, comprising inner ring 1, outer ring 2, steel ball 3, retainer 4, dust cover 5;Steel ball 3 is two and symmetrically arranged between inner ring 1 and outer ring 2, retainer 4 is arranged on steel ball 3, dust cover 5 is two and symmetrically arranged between outer ring 2 and inner ring 1, and located outside two steel balls 3. Specifically, a first concave space is arranged on the outer diameter surface of the outer ring 2, a second concave space is arranged on the end surface of the outer ring 2, the first concave space contains a radial positioning surface, the second concave space contains an axial positioning surface, the radial positioning surface and the axial positioning surface are perpendicular or parallel to each other, for cooperating with the positioning pin to realize radial and axial fixation. The bearing is installed in the bearing seat 21, and then the positioning pin 22 is inserted into the first concave space and the second concave space. The radial and axial positions of the bearing are positioned and fixed by the positioning pin 22, avoiding the creep caused by the rotation and movement of the outer ring 2 of the bearing, reducing the requirements for the diameter of the outer ring 2 and the end height of the bearing, reducing the requirement for replacing the bearing in the later period, improving the interchangeability, thereby ensuring the outer positioning of the bearing, reducing the manufacturing cost of the bearing, and the structure is simple, can be applied to various working conditions, is convenient to disassemble and assemble, and can ensure that the bearing can be normally used and has long service life. At the same time, the bearing can be put into the bearing chamber without the help of a clamp, and the bearing does not need to cooperate with the bearing chamber. Through the axial positioning of the end surface of the outer ring 2 and the radial fixation on the outer diameter surface, the bearing is located in the correct position during the operation of the equipment, so as to ensure the positioning accuracy.

[0040] The first concave space is a first annular groove 6, the first annular groove 6 has a flat part 7, the second concave space is a groove 8, and the flat part 7 and the flat surface of the groove 8 are arranged in parallel. In use, the positioning pin 22 is loaded on the bearing seat 21, then the bearing is put into the equipment, the groove 8 on the end surface of the bearing is attached to the positioning pin 22, the axial positioning of the bearing is realized, the positioning pin 22 is put in again, the flat part 7 on the outer diameter surface of the bearing is attached to realize radial fixation, and the purpose of bearing positioning is achieved.

[0041] In other embodiments, the first concave space can be a first hole 9, the second concave space can be a second hole 10, and the axes of the first hole 9 and the second hole 10 are located in the same plane and are perpendicular. In use, the positioning pin 22 is loaded on the bearing seat 21, then the bearing is put into the equipment, the positioning pin 22 is located in the first hole 9, the axial fixation of the bearing is realized, the positioning pin 22 is put in again, the positioning pin 22 is located in the second hole 10, and the purpose of bearing positioning is achieved.

[0042] The dust cover 5 comprises a first connecting part 11 and a second connecting part 12. The first connecting part 11 and the second connecting part 12 are integrally formed. One end of the first connecting part 11 abuts against the inner ring 1. The second connecting part 12 is fixed on the first connecting part 11 and one end of the second connecting part 12 abuts against the outer ring 2. A second annular groove 13 is formed on the end face of the inner ring 1. One end of the first connecting part 11 is inserted into the second annular groove 13. The end face of the second annular groove 13 is inclined. The inserted end of the first connecting part 11 is configured as a first inclined surface 14.

[0043] A convex ring 15 is arranged on the first connecting part 11. One end of the convex ring 15 abuts against the end face of the second annular groove 13. The convex ring 15 has a second inclined surface 16.

[0044] A clamping ring 17 is arranged on the second connecting part 12. A clamping groove 18 is formed on the outer ring 2 for embedding the clamping ring 17. The end face of one end of the second connecting part 12 is recessed inwardly to form an arc-shaped groove 19. The arc-shaped groove 19 cooperates with the end face of the clamping groove 18. The arc-shaped groove 19 and the clamping groove 18 have a gap therebetween.

[0045] The end face of one end of the first connecting part 11 is recessed inwardly to form a third annular groove 20.

[0046] In the description of the embodiments of the present application, it should be noted that, in the description of the present application, the terms indicating the direction or position relationship are based on the direction or position relationship shown in the drawings. This is merely for the convenience of description and does not indicate or imply that the device or component must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0047] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "in this embodiment", "specific examples", or "some examples" means that the specific features, mechanisms, 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 the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, mechanisms, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. Furthermore, different embodiments or examples described in the specification and the features of different embodiments or examples can be combined and combined by those skilled in the art without contradiction.

[0048] The above is merely a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or replacements easily thought of by those skilled in the art within the technical scope disclosed by the present application should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. An outer positioning bearing, comprising: an inner ring (1); an outer ring (2); steel balls (3) arranged between the inner ring (1) and the outer ring (2); a retainer (4) arranged on the steel balls (3); characterized in that: a first concave space is arranged on an outer diameter surface of the outer ring (2), and a second concave space is arranged on an end surface of the outer ring (2), the first concave space comprises a radial positioning surface, and the second concave space comprises an axial positioning surface, the radial positioning surface and the axial positioning surface are perpendicular or parallel to each other, and are used to cooperate with positioning pins to achieve radial and axial fixation, respectively.

2. The outer positioning bearing according to claim 1, characterized in that: the first concave space is a first annular groove (6), the first annular groove (6) has a flat portion (7) therein, and the second concave space is a groove (8), the flat portion (7) is arranged in parallel with a flat surface of the groove (8).

3. The outer positioning bearing according to claim 1, characterized in that: the first concave space is a first hole (9), and the second concave space is a second hole (10), the axes of the first hole (9) and the second hole (10) are located in the same plane and are perpendicular.

4. The outer positioning bearing according to claim 1, characterized in that: the outer positioning bearing further comprises: a dust cover (5) symmetrically arranged between the outer ring (2) and the inner ring (1).

5. The outer positioning bearing according to claim 4, characterized in that: the dust cover (5) comprises: a first connecting portion (11) abutting against the inner ring (1) at one end; a second connecting portion (12) fixedly arranged on the first connecting portion (11) and abutting against the outer ring (2) at one end.

6. The outer positioning bearing according to claim 5, characterized in that: an end surface of the inner ring (1) is provided with a second annular groove (13), one end of the first connecting portion (11) is inserted into the second annular groove (13), and an end surface of the second annular groove (13) is arranged in an inclined manner, and the inserted end of the first connecting portion (11) is configured as a first inclined surface (14).

7. The outer positioning bearing according to claim 6, characterized in that: a convex ring (15) is arranged on the first connecting portion (11), and one end of the convex ring (15) abuts against the end surface of the second annular groove (13).

8. The outer positioning bearing according to claim 7, characterized in that: the convex ring (15) has a second inclined surface (16).

9. The outer positioning bearing according to claim 5, characterized in that: a snap ring (17) is arranged on the second connecting portion (12), the outer ring (2) is provided with a clamping groove (18) for embedding the snap ring (17), an end surface of the second connecting portion (12) is recessed inward to form an arc-shaped groove (19), the arc-shaped groove (19) cooperates with an end surface of the clamping groove (18), and the arc-shaped groove (19) and the clamping groove (18) have a gap therebetween.

10. The outer positioning bearing according to claim 5, characterized in that: One end surface of the first connecting portion (11) is inwardly recessed to form a third annular groove (20).

Images