Radial ball bearing with long service life of lubricating grease

Abstract

The invention discloses a radial ball bearing with long service life of lubricating grease, which comprises an inner ring and an outer ring, the inner ring and the outer ring are respectively provided with a raceway, a roller is matched in the raceway, the inner ring and the outer ring are respectively provided with a flange on the outer side of the raceway, a sealing groove is formed between the edge of the inner ring and the flange and between the edge of the outer ring and the flange, and the sealing groove is matched with the roller. A dustproof cover is arranged in the sealing groove in a matched mode, the curvature of the raceway groove of the inner ring and / or the raceway groove of the outer ring is 0.53, and the edge of the flange is connected with the corresponding raceway through an inclined wall. Under the condition that the standard grease injection rate of the bearing is guaranteed, the grease injection amount is increased, the lubrication rate and reliability of the bearing are improved, and the service life of the bearing is prolonged.

Description

Technical Field

[0001] The invention relates to a radial ball bearing with a long service life of lubricating grease. Background Art

[0002] A radial ball bearing usually includes an outer ring and an inner ring. The outer ring and the inner ring are respectively provided with a raceway, and the raceway is equipped with a roller. In order to ensure the stability of the structure, the edges of the outer ring and the inner ring are provided with a rib connected to the edge of the raceway. At the same time, a sealing groove is provided between the edge of the inner ring and the outer ring and the rib. A dust cover is installed in the sealing groove to achieve the effect of isolating the inside and outside of the bearing. However, during the use of the radial ball bearing, if the rolling element and the raceway of the bearing ring are in direct contact, that is, a metal-metal contact pair, the friction coefficient is large during operation, and the friction and wear are serious, which will cause the bearing to fail early. Grease can form a lubricating oil film between the rolling element and the raceway. A good lubricating oil film can avoid direct contact between the rolling element and the raceway, with a small friction coefficient, small friction and wear, and low temperature rise, which can ensure the normal use of the bearing. However, after long-term use and consumption, due to insufficient grease or insufficient grease to smoothly enter the bearing raceway to participate in lubrication, the bearing friction and wear are often aggravated, the temperature rise is increased, the lubrication is poor, and finally the lubrication failure is caused, and the bearing service life is not long. Currently, there is still a lack of effective means to improve lubrication, which makes it impossible to extend the service life of bearings and affects the reliability of bearing structures. Summary of the invention

[0003] In view of the deficiencies in the prior art, the present invention provides a radial ball bearing with a long service life of grease, which can increase the grease injection amount while ensuring the standard grease injection rate of the bearing, improve the lubrication rate and reliability of the bearing, and extend the service life of the bearing.

[0004] To achieve the above-mentioned purpose, the present invention provides a radial ball bearing with a long service life of grease, including an inner ring and an outer ring, wherein the inner ring and the outer ring are respectively provided with raceways, wherein rollers are fitted in the raceways, wherein the inner ring and the outer ring are respectively provided with ribs on the outer sides of the raceways, and sealing grooves are formed between the edges of the inner ring and the outer ring and the ribs, wherein a dust cover is fitted in the sealing groove, the curvature of the inner ring and / or outer ring raceway groove is 0.53, and the edge of the rib is connected to the corresponding raceway through an inclined wall.

[0005] The beneficial effects of this arrangement are: with this arrangement, the bearing is a closed bearing, the interior of the bearing is filled with grease in a standard proportion, the free space inside the bearing is large, the outer ring grease storage groove can allow more grease to be filled, and more grease can be filled into the raceway; appropriately increasing the curvature of the outer ring raceway groove to 0.53 can reduce the friction and wear of the bearing, increase the speed, and achieve high speed; more grease is stored in the grease storage groove, and can be continuously added to the raceway for a long time to participate in lubrication, thereby extending the service life of the bearing.

[0006] As a further configuration of the present invention, the projections formed by the rib, inclined wall and raceway on the same radial section of the outer ring are respectively the rib line, the inclined wall line and the raceway arc line, the point on the rib line closest to the roller center is the base point S, the angle between the tangent line of the base point S and the raceway arc line and the horizontal line is set to α, and the angle between the inclined wall line and the horizontal line is 0.5α.

[0007] The beneficial effect of such a setting is that the point on the rib line closest to the center of the roller is the base point S, that is, the point at the highest or lowest position on the radial section of the outer ring on the side of the rib close to the roller. As a preferred setting, α is set to 20~30°, so that the angle between the inclined wall line and the horizontal line can be set in the range of 10~15°, ensuring that the raceway can effectively disperse and withstand the force from the roller when bearing circumferential load, thereby improving the bearing capacity and service life of the bearing. At the same time, the setting of the angle can also optimize the movement trajectory of the roller, reduce friction and wear, and improve the stability and efficiency of operation. Further, through the angle design, the inclined wall can more effectively guide the grease to flow to the raceway and roller, thereby realizing the maximum capacity storage of grease. This design not only increases the storage space for grease, but also ensures that during the operation of the equipment, grease can be continuously and evenly supplied to the parts that need lubrication, reducing grease consumption and extending the lubrication cycle.

[0008] As a further configuration of the present invention, the inclined wall is smoothly connected to the raceway via a circular arc surface.

[0009] The beneficial effect of this arrangement is that it effectively avoids direct collision or scratching of the rolling element with the sharp edges at the intersection during assembly, thereby protecting the surface integrity of the rolling element. The arc surface enables the rolling element to experience a smooth transition when entering and exiting the raceway, reducing the potential risk of damage caused by sharp edges, and increasing the service life of the rolling element and the reliability of the entire bearing. In addition, this smooth connection design also helps to reduce noise and vibration during assembly, improve assembly quality and comfort of the working environment. The arc surface structure can also evenly disperse the force borne by the rolling element, reduce stress concentration, and further enhance the durability of the structure.

[0010] As a further configuration of the present invention, the inclined wall is smoothly connected to the retaining edge via an arc surface.

[0011] The beneficial effect of this arrangement is that by utilizing the transition of the arc surface, a seamless connection between the inclined wall and the rib is achieved, which can effectively enhance the rigidity of the ferrule and provide the bearing with anti-deformation ability. At the same time, stress concentration and fracture at the intersection of the rib and the sealing groove can be avoided. This structure is not only beautiful, it can also effectively guide the flow of grease, avoid the formation of dead corners and cavities, and ensure that the grease can be fully and evenly filled in the preset space. The design of the arc surface increases the grease capacity of the structure, while reducing the agitation and splashing of grease during high-speed operation, improving lubrication efficiency and extending the service life of the equipment.

[0012] As a further configuration of the present invention, the free end of the dust cover is bent toward the roller to form a folded foot.

[0013] The beneficial effect of such a setting is that the folding foot structure is to effectively reduce the spillage of lubricating grease while maintaining the lubrication effect. This structural feature forms a physical barrier by creating an inward bend at the free end of the dust cover, which can intercept and guide the lubricating grease to the appropriate position when the roller and the cage are running at high speed, and prevent the grease from leaking outward along the gap. This not only helps to maintain the cleanliness of the lubrication system and reduce the waste of grease, but also avoids the pollution of the external environment of the equipment caused by grease spillage, thereby maintaining the overall cleanliness of the equipment and the hygiene of the working environment. In addition, the setting of the folding foot also cleverly enhances the overall stability of the dust cover by changing the center of gravity position of the dust cover, so that it is more firmly fixed in place during the operation of the equipment and is not easy to loosen or shift due to vibration. This structural design fully considers the dynamic behavior of mechanical parts under actual working conditions. Through simple bending processing, it realizes effective control of the flow path of lubricating grease, improves the efficiency and reliability of the lubrication system, and enables the entire mechanical system to maintain a more stable and efficient working state in long-term operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the first embodiment of the present invention; Figure 2 It is a structural schematic diagram of a second embodiment of the present invention; Figure 3 It is a structural schematic diagram of a third embodiment of the present invention; Figure 4 is a schematic structural diagram of a fourth embodiment of the present invention; Figure 5 It is a schematic diagram of the position arrangement of the sidewall line, the inclined wall line and the raceway arc line at the outer ring position in an embodiment of the present invention; Figure 6 It is a schematic diagram of the position arrangement of the sidewall line, the inclined wall line and the raceway arc line at the inner ring position in an embodiment of the present invention. DETAILED DESCRIPTION

[0015] The present invention provides a first embodiment of a radial ball bearing having a long service life of lubricating grease, such as Figure 1 As shown, it includes an inner ring 2 and an outer ring 1, wherein the inner ring 2 and the outer ring 1 are respectively provided with a raceway 6, wherein the raceway 6 is equipped with a roller 3, wherein the inner ring 2 and the outer ring 1 are respectively provided with a rib 5 on the outer side of the raceway 6, wherein a sealing groove is formed between the edge of the inner ring 2 and the outer ring 1 and the rib 5, wherein a dust cover 4 is equipped in the sealing groove, wherein the curvature of the groove of the raceway 6 of the inner ring 2 and the outer ring 1 is 0.53, and the edge of the rib 5 of the outer ring 1 is connected to the corresponding raceway 6 through an inclined wall 51. The inclined wall 51 is smoothly connected to the raceway 6 through an arc surface. The inclined wall 51 is smoothly connected to the rib 5 through an arc surface. The free end of the dust cover 4 is bent toward the roller 3 to form a folding foot 41.

[0016] The present invention provides a second embodiment of a radial ball bearing with a long service life of lubricating grease, such as Figure 2 As shown, it includes an inner ring 2 and an outer ring 1, wherein the inner ring 2 and the outer ring 1 are respectively provided with a raceway 6, wherein the raceway 6 is equipped with a roller 3, wherein the inner ring 2 and the outer ring 1 are respectively provided with a rib 5 on the outside of the raceway 6, wherein a sealing groove is formed between the edge of the inner ring 2 and the outer ring 1 and the rib 5, wherein a dust cover 4 is equipped in the sealing groove, wherein the curvature of the groove of the raceway 6 of the inner ring 2 and the outer ring 1 is 0.53, wherein the edge of the rib 5 of the inner ring 2 is connected to the corresponding raceway 6 through an inclined wall 51. The inclined wall 51 is smoothly connected to the raceway 6 through an arc surface. The inclined wall 51 is smoothly connected to the rib 5 through an arc surface. The free end of the dust cover 4 is bent toward the roller 3 to form a folding foot 41.

[0017] The present invention provides a third embodiment of a radial ball bearing with a long service life of lubricating grease, such as Figure 3 As shown, it includes an inner ring 2 and an outer ring 1, wherein the inner ring 2 and the outer ring 1 are respectively provided with a raceway 6, wherein the raceway 6 is equipped with a roller 3, wherein the inner ring 2 and the outer ring 1 are respectively provided with a rib 5 on the outside of the raceway 6, wherein a sealing groove is formed between the edges of the inner ring 2 and the outer ring 1 and the rib 5, wherein a dust cover 4 is equipped in the sealing groove, wherein the curvature of the raceway 6 of the inner ring 2 and the outer ring 1 is 0.53, wherein the edges of the rib 5 of the inner ring 2 and the rib 5 of the outer ring 1 are respectively connected to the corresponding raceway 6 through an inclined wall 51. The inclined wall 51 is smoothly connected to the raceway 6 through an arc surface. The inclined wall 51 is smoothly connected to the rib 5 through an arc surface. The free end of the dust cover 4 is bent toward the roller 3 to form a folding foot 41.

[0018] The present invention provides a fourth embodiment of a radial ball bearing with a long service life of lubricating grease, such as Figure 4As shown, it includes an inner ring 2 and an outer ring 1, wherein the inner ring 2 and the outer ring 1 are respectively provided with a raceway 6, wherein the raceway 6 is equipped with a roller 3, wherein the inner ring 2 and the outer ring 1 are respectively provided with a rib 5 on the outside of the raceway 6, wherein a sealing groove is formed between the edges of the inner ring 2 and the outer ring 1 and the rib 5, wherein a dust cover 4 is equipped in the sealing groove, wherein the curvature of the raceway 6 of the inner ring 2 and the outer ring 1 is 0.53, wherein the edge of the rib 5 of the inner ring 2 on one side and the edge of the rib 5 of the outer ring 1 are respectively connected to the corresponding raceway 6 through an inclined wall 51. The inclined wall 51 is smoothly connected to the raceway 6 through an arc surface. The inclined wall 51 is smoothly connected to the rib 5 through an arc surface. The free end of the dust cover 4 is bent toward the roller 3 to form a folding foot 41.

[0019] like Figure 5 and Figure 6 The figure shows a schematic diagram of the positions of the sidewall line 71, the inclined wall line 72 and the raceway arc line 73 at the inner ring position and the outer ring position. The projections formed by the sidewall 5, the inclined wall 51 and the raceway 6 on the radial section of the same outer ring 1 are the sidewall line 71, the inclined wall line 72 and the raceway arc line 73 respectively. The point on the sidewall line 71 closest to the center of the roller 3 is the base point S. The angle between the base point S and the tangent line of the raceway arc line 73 and the horizontal line is set to α, and α is set to 20°. The angle between the inclined wall line 72 and the horizontal line is 10°.

[0020] The above example is only one preferred specific example of the present invention. Common changes and substitutions made by those skilled in the art within the scope of the technical solution of the present invention are all included in the protection scope of the present invention.

Claims

1. A radial ball bearing with long service life of grease, characterized in that: It includes an inner ring and an outer ring, each of which is provided with a raceway, each of which is equipped with a roller, each of which is provided with a rib on the outer side of the raceway, each of which is provided with a sealing groove between the edges of the inner ring and the outer ring and the rib, each of which is equipped with a dust cover, the curvature of the raceway groove of the inner ring and / or the outer ring is 0.53, and the edge of the rib is connected to the corresponding raceway through an inclined wall.

2. The radial ball bearing with long service life of grease according to claim 1, characterized in that: The projections formed by the rib, inclined wall and raceway on the same radial section of the outer ring are respectively the rib line, the inclined wall line and the raceway arc line, the point on the rib line closest to the roller center is the base point S, the angle between the tangent line of the base point S and the raceway arc line and the horizontal line is set to α, and the angle between the inclined wall line and the horizontal line is 0.5α.

3. The radial ball bearing with long service life of grease according to claim 1, characterized in that: The inclined wall is smoothly connected to the raceway via a circular arc surface.

4. The radial ball bearing with long service life of grease according to claim 3, characterized in that: The inclined wall is smoothly connected to the retaining edge through an arc surface.

5. The radial ball bearing with long service life of grease according to claim 1, characterized in that: The free end of the dust cover is bent toward the roller to form a folded foot.

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