Ball bearing

Abstract

The invention relates to the field of bearings, and particularly discloses a ball bearing which comprises an outer steel ring, an inner steel ring and a retainer arranged between the outer steel ring and the inner steel ring, a plurality of balls are rotationally matched in the retainer, the retainer is composed of two half frames which are symmetrically arranged, the two half frames are detachably connected through a connecting piece, each half frame comprises a plurality of limiting parts, and the limiting parts are arranged on the outer steel ring. A connecting part is fixedly arranged between every two adjacent limiting parts, the multiple limiting parts and the multiple connecting parts are circularly arranged, the two oppositely-arranged limiting parts jointly form a circular ring, and the oil holes are formed, so that lubricating grease outside the retainer can enter the retainer through the oil holes to lubricate the limiting parts and the balls, friction between the limiting parts and the balls is reduced, and the service life of the retainer is prolonged. Meanwhile, the detachable connection between the two half frames facilitates the replacement of the retainer, and the clamping ring is clamped in the clamping groove, so that the two connecting parts can be clamped under the matching of the clamping ring and the annular bulge, the mutual fixed connection of the two connecting parts is realized, and the replacement of the retainer is facilitated.

Description

Technical Field

[0001] The invention relates to the field of bearings, in particular to a ball bearing. Background Art

[0002] A ball bearing is also called a spherical bearing. Its balls are installed in a cage between the inner and outer steel rings so that the balls can be evenly distributed between the inner and outer steel rings. In order to confine the balls in the cage, the cage covers the outside of the balls and the cage and the balls fit together. This causes the grease in the bearing to be unable to enter well between the cage and the balls, which leads to more severe wear between the cage and the balls when the bearing rotates at high speed. The gap between the cage and the balls increases, and the cage cannot play a good role in limiting the position of the balls. The balls are also prone to collide with the cage during rolling. Over time, the cage is prone to damage and the bearing cannot rotate normally. Moreover, the traditional cage is composed of two symmetrical semi-cages fixedly connected by rivets. When the cage is severely worn, it is inconvenient to replace it. Summary of the invention

[0003] The object of the present invention is to provide a ball bearing for overcoming the above-mentioned defects in the prior art.

[0004] A ball bearing according to the present invention comprises an outer steel ring, an inner steel ring and a retaining frame arranged between the outer steel ring and the inner steel ring, a plurality of balls are rotatably fitted in the retaining frame, the retaining frame is composed of two symmetrically arranged half-frames, the two half-frames are detachably connected by a connecting piece, the half-frames comprise a plurality of defining parts, a connecting part is fixedly provided between two adjacent defining parts, a plurality of the defining parts and a plurality of connecting parts are arranged in a circle, two oppositely arranged defining parts together form a circular ring, the balls are rotatably connected in the circular ring, and two oil holes penetrating the circumferential wall of the defining part are provided.

[0005] Through the above technical solution, the oil hole is opened so that the grease outside the cage can enter the cage through the oil hole to lubricate the limiting part and the ball, thereby reducing the friction between the limiting part and the ball. At the same time, the detachable connection between the two half frames is conducive to the replacement of the cage.

[0006] In the above technical solution, the vertical distance between the oil hole and the surface of the connecting portion is consistent with the vertical distance between the oil hole and the vertex of the limiting portion, and the oil hole is parallel to the connecting portion.

[0007] Through the above technical solution, the oil hole is arranged in the above manner so that when the retaining frame rotates, the grease can more easily enter the limiting portion through the oil hole.

[0008] In the above technical solution, a main oil groove is opened on the inner side wall of the limiting part, and the main oil groove is arranged along the arc direction of the limiting part. The oil hole is connected to the main oil groove, and the main oil grooves in the two relatively arranged limiting parts form an annular groove, and the annular groove surrounds the ball.

[0009] Through the above technical solution, the provision of the main oil groove is conducive to the storage of grease therein, thereby increasing the grease filling amount between the limiting part and the ball, and further reducing the friction between the limiting part and the ball.

[0010] In the above technical solution, the inner side wall of the limiting portion is further provided with a plurality of oil separation grooves equidistantly distributed along the main oil groove and arranged on both sides of the main oil groove. Both ends of the oil separation grooves are opened, and one end of the oil separation grooves is connected to the main oil groove.

[0011] Through the above technical solution, the provision of the oil distribution groove can make the grease evenly distributed between the limiting portion and the ball, further improving the lubricating effect of the grease on the limiting portion and the ball.

[0012] In the above technical solution, the oil sub-tank is arranged to be inclined relative to the main oil tank, and the oil sub-tanks on both sides of the main oil tank have the same inclination direction.

[0013] Through the above technical solution, the oil sub-groove is arranged obliquely to the main oil groove, so that during the rotation of the retaining frame, the grease in the main oil groove can quickly fill the oil sub-groove.

[0014] In the above technical solution, the connecting part is provided with two connecting holes which penetrate through its thickness, the connecting piece includes a clamping ring and a connecting bolt which can penetrate through the connecting hole, one end of the connecting bolt extends radially outward to form an annular protrusion, the annular protrusion abuts against one of the surfaces of the connecting part, and the other end of the connecting bolt is provided with a clamping groove which surrounds the connecting bolt, a clamping ring is clamped in the clamping groove, and the clamping ring abuts against the surface of the other connecting part.

[0015] Through the above technical solution, the clamping ring is clamped in the clamping groove, and the two connecting parts can be clamped under the cooperation of the clamping ring and the annular protrusion, so that the two connecting parts are fixedly connected to each other.

[0016] In the above technical solution, the two connection holes on the same connection part are respectively located at two ends of the connection part.

[0017] Through the above technical solution, when the connecting member fixes the two connecting parts, the fixing position of the connecting member is close to the limiting part, thereby increasing the strength of the two limiting parts covering the ball and ensuring the limiting effect of the limiting parts on the ball.

[0018] In the above technical solution, a connecting rod is arranged between two connecting bolts located on the same connecting portion, and the connecting rod is respectively fixed to the annular protrusions at the ends of the two connecting bolts.

[0019] Through the above technical solution, the two connecting bolts on the same connecting part are connected, which is convenient for installing the two connecting bolts at the same time, thereby facilitating the convenience of installing the connecting piece.

[0020] The clamping ring is arc-shaped, the distance between the two ends of the clamping ring is smaller than the inner diameter of the clamping groove, the inner diameter of the clamping ring is consistent with the inner diameter of the clamping groove, both ends of the clamping ring are fixed with clamping joints, and the clamping joints are provided with through holes that penetrate along their thickness.

[0021] Through the above technical solution, the two ends of the clamping ring can be opened by opening the two clamping joints, which is convenient for disassembly and assembly of the clamping ring.

[0022] The beneficial effects of the present invention are as follows: the oil hole is provided so that the grease outside the retaining frame can enter the retaining frame through the oil hole to lubricate the limiting portion and the ball, thereby reducing the friction between the limiting portion and the ball. At the same time, the detachable connection between the two half-frames is conducive to the replacement of the retaining frame. Moreover, by clamping the retaining ring in the clamping groove, the two connecting parts can be clamped in cooperation with the retaining ring and the annular protrusion, thereby realizing the fixed connection between the two connecting parts, which is conducive to the replacement of the retaining frame. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 is an exploded view of the present invention; Figure 3 It is a schematic diagram of the structure of the retainer in the present invention; Figure 4 The present invention Figure 3 The enlarged schematic diagram at A in the middle; Figure 5 It is a structural schematic diagram of a half frame in the present invention; Figure 6 It is a structural schematic diagram of the main oil tank in the present invention; Figure 7 The present invention Figure 6 The enlarged schematic diagram of point B in the middle; Figure 8 It is a structural schematic diagram of the connecting member in the present invention; Fig. 9 is a cross-sectional schematic diagram of the connecting bolt in the present invention; Fig.10 The present invention Fig. 9 Enlarged schematic diagram at point C in the middle.

[0024] In the figure: 10. Outer steel ring; 11. Inner steel ring; 12. Sealing ring; 30. Connecting part; 301. Connecting hole; 31. Limiting part; 311. Oil hole; 312. Main oil groove; 313. Sub-oil groove; 40. Ball bearing; 50. Connecting rod; 51. Connecting bolt; 511. Snap groove; 512. Snap joint; 52. Snap ring. DETAILED DESCRIPTION

[0025] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate directions or positional relationships based on the attached Figure 1 The orientation or positional relationship shown is only for the convenience of simplifying the description of the present invention, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0026] In order to make the purpose and advantages of the present invention more clearly understood, the present invention is specifically described in conjunction with the embodiments below. It should be understood that the following text is only used to describe one or several specific embodiments of the present invention, and does not strictly limit the scope of protection of the specific claims of the present invention. As used herein, the terms up, down and left, right are not limited to their strict geometric definitions, but include reasonable and inconsistent tolerances for machining or human errors. The specific features of this ball bearing are described in detail below: An embodiment of the present invention: Reference Figure 1-Figure 10 The present invention provides a ball bearing, including an outer steel ring 10, an inner steel ring 11 and a retaining frame arranged between the outer steel ring 10 and the inner steel ring 11, a sealing ring 12 located on both sides of the retaining frame is embedded between the outer steel ring 10 and the inner steel ring 11, a plurality of balls 40 are rotatably fitted in the retaining frame, the retaining frame is composed of two symmetrically arranged half frames, the two half frames are detachably connected by a connecting piece, the half frame includes a plurality of limiting parts 31, a connecting part 30 is fixed between two adjacent limiting parts 31, the plurality of limiting parts 31 and the plurality of connecting parts 30 are arranged in a circle, the projection of the plurality of limiting parts 31 and the plurality of connecting parts 30 on the horizontal plane when the plurality of limiting parts 31 and the plurality of connecting parts 30 are placed horizontally is a circular ring, the two oppositely arranged limiting parts 31 together form a circular ring, the balls 40 are rotatably connected in the circular ring, and two oil holes 311 penetrating the peripheral wall of the limiting part 31 are provided.

[0027] Reference Figure 4 The vertical distance between the oil hole 311 and the surface of the connecting portion 30 is consistent with the vertical distance between the oil hole 311 and the vertex of the limiting portion 31 , and the oil hole 311 is parallel to the connecting portion 30 .

[0028] Reference Figure 4-7A main oil groove 312 is provided on the inner wall of the defining portion 31. The main oil groove 312 is arranged along the arc direction of the defining portion 31. The oil hole 311 is connected to the main oil groove 312. The main oil grooves 312 in the two oppositely arranged defining portions 31 form an annular groove. The annular groove surrounds the ball 40. The inner wall of the defining portion 31 is also provided with a plurality of oil-dividing grooves 313 which are equidistantly distributed along the main oil groove 312 and arranged on both sides of the main oil groove 312. The oil-dividing grooves 313 are opened at both ends. One end of the oil-dividing grooves 313 is connected to the main oil groove 312. The oil-dividing grooves 313 are arranged obliquely to the main oil groove 312. The oil-dividing grooves 313 on both sides of the main oil groove 312 The inclination direction is consistent. When the retaining frame rotates with the bearing, the grease around the retaining frame will enter from the oil hole 311 on one side of the limiting portion 31, and be discharged from the oil hole 311 on the other side after passing through the main oil groove 312. The rotation direction of the retaining frame is different, and the movement direction of the grease in the main oil groove 312 is different. The sub-oil grooves 313 on the upper and lower sides of the main oil groove 312 have the same inclination direction, so that no matter what the movement direction of the grease in the main oil groove 312 is, there is always one side of the sub-oil groove 313 that is oblique to the movement direction of the grease, so that the grease can quickly enter the sub-oil groove 313 from the main oil groove 312.

[0029] Reference Figure 3-Figure 5 , Figure 8-Figure 10 The connecting part 30 is provided with two connecting holes 301 penetrating along the thickness thereof, the connecting piece comprises a snap ring 52 and a connecting bolt 51 which can penetrate the connecting hole 301, one end of the connecting bolt 51 extends radially outward to form an annular protrusion, the annular protrusion abuts against the surface of one of the connecting parts 30, and the outer periphery of the other end of the connecting bolt 51 is provided with a clamping groove 511 surrounding the connecting bolt 51, the distance between a side wall of the clamping groove 511 close to the connecting part 30 and a side surface of the annular protrusion close to the connecting part 30 is twice the thickness of the connecting part 30, the clamping ring 52 is clamped in the clamping groove 511, and the clamping ring 52 abuts against the surface of the other connecting part 30, The two connecting holes 301 on the same connecting part 30 are respectively located at the two ends of the connecting part 30, and a connecting rod 50 is arranged between the two connecting bolts 51 located on the same connecting part 30. The connecting rod 50 is respectively fixed to the annular protrusions at the ends of the two connecting bolts 51. The snap ring 52 is arc-shaped, and the distance between the two ends of the snap ring 52 is smaller than the inner diameter of the snap groove 511. The outer edge of the upper side wall of the snap groove 511 is chamfered to facilitate the snap joint 512 to be snapped into the snap groove 511. The inner diameter of the snap ring 52 is consistent with the inner diameter of the snap groove 511. The snap joints 512 are fixed at both ends of the snap ring 52, and a through hole is opened in the snap joint 512 that penetrates along its thickness.

[0030] During the operation of the ball bearing, the retaining frame and the ball 40 therein rotate with the rotation of the inner steel ring 11 or the outer steel ring 10. As the retaining frame rotates, the grease outside the retaining frame enters the limiting portion 31 through the oil hole 311 opened on the limiting portion 31, and flows through the main oil groove 312 and is discharged from the oil hole 311 on the other side. When the grease flows through the main oil groove 312, one end of the oil distribution groove 313 inclined to the main oil groove 312 contacts the grease, and part of the grease quickly fills the oil distribution groove 313 and is discharged from the other end, so that the grease is quickly and evenly distributed between the limiting portion 31 and the ball 40, thereby reducing the friction between the ball 40 and the retaining frame, reducing the wear of the ball 40 on the retaining frame when the ball 40 rolls, and ensuring the positioning effect of the retaining frame on the ball 40.

[0031] If the retaining frame needs to be replaced, open the sealing ring 12, insert the pointed end of the elbow needle-nosed pliers into the through holes of the clamping joints 512 at both ends of the clamping ring 52, and bend the clamping ring 52 outward by the elbow needle-nosed pliers to make it elastically deform, and the two clamping joints 512 move away from each other, so that the distance between the two clamping joints 512 is larger than the inner diameter of the clamping groove 511, so that the clamping ring 52 can be removed from the clamping groove 511. By doing so, all the clamping rings 52 can be removed from the clamping groove 511, and the two connecting parts 30 can be separated, thereby improving the convenience of replacing the retaining frame.

[0032] It will be clear to those skilled in the art that various modifications to the above embodiments may be made without departing from the overall spirit and concept of the present invention. All of these modifications fall within the scope of protection of the present invention. The protection scheme of the present invention shall be subject to the claims attached to the present invention.

Claims

1. A ball bearing, comprising an outer steel ring (10), an inner steel ring (11), and a cage arranged between the outer steel ring (10) and the inner steel ring (11), wherein a plurality of balls (40) are rotatably engaged in the cage, characterized in that: The retaining frame is composed of two symmetrically arranged half frames, the two half frames being detachably connected via a connecting piece, the half frames comprising a plurality of defining portions (31), a connecting portion (30) being fixedly arranged between two adjacent defining portions (31), the plurality of defining portions (31) and the plurality of connecting portions (30) being arranged in a circle, the two defining portions (31) being arranged opposite to each other together forming a circular ring, the ball (40) being rotatably connected in the circular ring, and two oil holes (311) penetrating the peripheral wall of the defining portion (31) being provided.

2. A ball bearing according to claim 1, characterized in that: The vertical distance between the oil hole (311) and the surface of the connecting portion (30) is consistent with the vertical distance between the oil hole (311) and the vertex of the limiting portion (31), and the oil hole (311) is parallel to the connecting portion (30).

3. A ball bearing according to claim 1, characterized in that: A main oil groove (312) is provided on the inner side wall of the defining portion (31), the main oil groove (312) is arranged along the arc direction of the defining portion (31), the oil hole (311) is connected to the main oil groove (312), and the main oil grooves (312) in the two defining portions (31) arranged opposite to each other form an annular groove, and the annular groove surrounds the ball (40).

4. A ball bearing according to claim 2, characterized in that: The inner side wall of the limiting portion (31) is also provided with a plurality of oil separation grooves (313) which are equidistantly distributed along the main oil groove (312) and arranged on both sides of the main oil groove (312). Both ends of the oil separation grooves (313) are open, and one end of the oil separation grooves (313) is in communication with the main oil groove (312).

5. A ball bearing according to claim 4, characterized in that: The oil separation groove (313) is arranged obliquely to the main oil groove (312), and the oil separation grooves (313) on both sides of the main oil groove (312) have the same inclination direction.

6. A ball bearing according to claim 1, characterized in that: The connecting portion (30) is provided with two connecting holes (301) penetrating along the thickness thereof. The connecting piece comprises a clamping ring (52) and a connecting bolt (51) which can penetrate the connecting hole (301). One end of the connecting bolt (51) extends radially outward to form an annular protrusion, and the annular protrusion abuts against the surface of one of the connecting portions (30). The other end of the connecting bolt (51) is provided with a clamping groove (511) surrounding the connecting bolt (51). The clamping ring (52) is clamped in the clamping groove (511), and the clamping ring (52) abuts against the surface of the other connecting portion (30).

7. A ball bearing according to claim 6, characterized in that: The two connection holes (301) on the same connection portion (30) are respectively located at two ends of the connection portion (30).

8. A ball bearing according to claim 6, characterized in that: A connecting rod (50) is provided between two connecting bolts (51) located on the same connecting portion (30), and the connecting rod (50) is respectively fixedly connected to the annular protrusions at the ends of the two connecting bolts (51).

9. A ball bearing according to claim 6, characterized in that: The clamping ring (52) is arc-shaped, the distance between the two ends of the clamping ring (52) is smaller than the inner diameter of the clamping groove (511), the inner diameter of the clamping ring (52) is consistent with the inner diameter of the clamping groove (511), and clamping joints (512) are fixedly provided at both ends of the clamping ring (52), and a through hole is provided in the clamping joint (512) that penetrates along its thickness.

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