CN220248680U - Four-point contact ball bearing - Google Patents

Abstract

The utility model relates to the technical field of bearings, in particular to a four-point contact ball bearing. The bearing comprises an inner ring, an outer ring, a retainer, rolling bodies and a sealing ring, wherein the sealing ring is arranged between the inner ring and the outer ring to form a sealing cavity, the sealing cavity is used for accommodating lubricating media, the inner diameter of the outer ring is provided with a guide groove, the guide groove comprises a first guide surface, the first guide surface points to a pocket hole between the retainer and the rolling bodies, so that when the bearing runs, the guide groove is used for accommodating the lubricating media thrown into the guide groove along the sealing ring and conveying at least part of the lubricating media to the pocket hole along the first guide surface.

Description

Four-point contact ball bearing

Technical Field

The utility model relates to the technical field of bearings, in particular to a four-point contact ball bearing.

Background

New energy vehicles are increasingly requiring more space in the passenger compartment, which requires the drive system to be as small as possible without reducing power. The increase in the unit power density of the drive system also places higher demands on the bearings therein. Compared with the deep groove ball bearing with the same size, the four-point contact ball bearing has larger bearing capacity, so that the four-point contact ball bearing is increasingly applied to new energy automobiles.

However, once the four-point contact ball bearing is applied to a new energy automobile, the four-point contact ball bearing is inevitably operated under a high-speed working condition, the self-lubrication of the bearing is improved, the internal lubrication condition of the existing bearing is poor, the structures such as rolling bodies and a retainer in the bearing are difficult to lubricate timely and effectively in face of the high-speed working condition, and the service life of the bearing is further shortened.

Disclosure of Invention

In view of the defects in the prior art, the utility model provides a four-point contact ball bearing, which can throw a lubricating medium into a guide groove along a sealing ring under a high-speed working condition, and can squeeze the lubricating medium into a pocket of a retainer along with accumulation of the lubricating medium in the guide groove, so that lubrication is improved, and the service life is prolonged.

In order to achieve the above purpose, the technical scheme provided by the utility model is that the four-point contact ball bearing comprises an inner ring, an outer ring, a retainer, rolling bodies and a sealing ring, wherein the sealing ring is arranged between the inner ring and the outer ring to form a sealing cavity, the sealing cavity is used for accommodating lubricating media, a guide groove is formed in the inner diameter of the outer ring, the guide groove comprises a first guide surface, the first guide surface points to a pocket between the retainer and the rolling bodies, so that when the bearing runs, the guide groove is used for accommodating the lubricating media thrown into the guide groove along the sealing ring, and conveying at least part of the lubricating media to the pocket along the first guide surface.

Further, the guide groove is formed at a position close to the rolling body.

Further, the guide groove is a V-shaped guide groove, and the V-shaped guide groove comprises a second guide surface inclined to one side of the sealing ring and the first guide surface inclined to one side of the rolling body.

Further, the first guide surface and the second guide surface meet at a groove bottom intersection line, and the groove bottom intersection line is projected on the retainer along the radial direction of the bearing.

Further, the inclination angle of the first guide surface is larger than the inclination angle of the second guide surface.

Further, the inclination angle of the first guide surface is 60 ° or more and 90 ° or less.

Further, the retainer comprises a plurality of C-shaped isolation clasps which are connected in sequence, and the C-shaped isolation clasps form the pocket.

Further, the pocket hole comprises a middle arc surface and a first straight surface and a second straight surface which are respectively connected with two sides of the middle arc surface.

Further, a first inclined chamfer inclined to one side of the rolling body is formed on the end face, close to the outer ring, of the retainer, and a channel for conveying the lubricating medium to the pocket is formed between the first inclined chamfer and the first guide surface.

Further, the end face of the retainer, which is close to the outer ring, is provided with a second inclined chamfer which is inclined to the sealing ring.

The utility model has the beneficial effects that: the inner diameter of the outer ring of the four-point contact ball bearing is provided with the two guide grooves, in the operation process, the lubricating medium can be thrown into the guide grooves along the sealing rings, and along with the accumulation of the lubricating medium in the guide grooves, the lubricating medium can be extruded into the pockets of the retainer, so that the lubrication is improved, and the service life of the bearing is prolonged.

Drawings

FIG. 1 is a schematic view of a four-point contact ball bearing according to an embodiment of the present utility model;

FIG. 2 is an enlarged view of a portion of a four-point contact ball bearing in accordance with an embodiment of the present utility model;

FIG. 3 is a schematic view of a cage in a four-point contact ball bearing according to an embodiment of the present utility model;

FIG. 4 is a schematic view showing a partial structure of a cage in a four-point contact ball bearing according to an embodiment of the present utility model;

FIG. 5 is a schematic view of a four-point contact ball bearing according to another embodiment of the present utility model;

FIG. 6 is an enlarged view of a portion of a four-point contact ball bearing in accordance with another embodiment of the utility model;

in the figure: 10. the four-point contact ball bearing is used for the bearing,

100. an inner ring is arranged on the inner ring,

200. outer ring 210, guide groove 211, first guide surface 212, second guide surface 213, groove bottom intersection line,

300. the retainer, 310, the first inclined chamfer, 320, the isolating ring, 330, the C-shaped isolating ring, 331, the middle circular arc surface, 332, the first straight surface, 333, the second straight surface, 334, the first side circular arc surface, 335, the second side circular arc surface, 340, the second inclined chamfer, 350, the round table-shaped structure, 360, the pocket Kong Zhibi, 361, the conical opening,

400. the rolling bodies are arranged on the inner surfaces of the rolling bodies,

500. a sealing ring, a sealing ring and a sealing ring,

a. sealing the cavity.

Detailed Description

In order that the above objects, features and advantages of the utility model will be readily understood, a more particular description of the utility model will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model. The present utility model may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the utility model, whereby the utility model is not limited to the specific embodiments disclosed below.

Referring to fig. 1 and 2, a schematic structural diagram of a four-point contact ball bearing 10 according to an embodiment of the present utility model is shown, which is applied to a use scenario with a high rotation speed, and includes an inner ring 100, an outer ring 200, a cage 300, rolling elements 400 and a seal ring 500. The cage 300 is internally provided with a plurality of rolling elements 400, the cage 300 provided with the rolling elements 400 is arranged between the inner ring 100 and the outer ring 200, the sealing ring 500 is arranged between the inner ring 100 and the outer ring 200 to form a sealing cavity a, when the cage is specifically arranged, as shown in fig. 2, an inner ring sealing groove can be formed at a position, close to two end surfaces, of the inner ring 100, an outer ring sealing groove can be formed at a position, close to two end surfaces, of the outer ring 200, the sealing ring 500 is arranged between the inner ring sealing groove and the outer ring sealing groove, and the formed sealing cavity a is used for accommodating a lubricating medium, and the filling amount of the lubricating medium comprises but is not limited to lubricating grease.

As shown in fig. 2, the inner diameter of the outer ring 200 is provided with a guide groove 210, the guide groove 210 includes a first guide surface 211, the first guide surface 211 points to a pocket between the cage 300 and the rolling elements 400, so that when the bearing operates, the guide groove 210 is used for accommodating a lubrication medium thrown into the guide groove 210 along the seal ring 500, and conveying at least part of the lubrication medium to the pocket along the first guide surface 211.

In the four-point contact ball bearing 10, the inner diameter of the outer ring 200 is provided with two guide grooves 210, and under the high-speed working condition, the lubricating medium can be thrown into the guide grooves 210 along the sealing ring 500, and along with the accumulation of the lubricating medium in the guide grooves 210, the lubricating medium can be extruded into the pockets of the retainer, so that the lubrication is improved, and the service life is prolonged. It should be noted that, in order to facilitate marking the first guide surface 211 on the right side in fig. 2, the inner diameter of the outer ring 200 on both sides of the rolling element 400 is provided with the guide groove 210, but since the cage 300 in this embodiment has a relatively special structure, it is a non-fully-enclosed cage as shown in fig. 3, only the first guide surface 211 on one side is directed to the pocket between the cage 300 and the rolling element 400. But the guide grooves 210 on both sides can play a role of accumulating the lubrication medium and guiding the lubrication medium to one side of the rolling element 400, thereby improving the lubrication characteristics during the operation of the bearing.

Preferably, as shown in fig. 3, in one embodiment, the guide groove 210 is a V-shaped guide groove, and the V-shaped guide groove includes a second guide surface 212 inclined to one side of the seal ring 500 and a first guide surface 211 inclined to one side of the rolling element 400.

As shown in fig. 3, in one embodiment, the first guide surface 211 and the second guide surface 212 meet at a groove bottom intersection line 213, and the groove bottom intersection line 213 is a projection of the radial presence of the bearing on the cage 300. This facilitates the lubrication medium deposited in the guide groove 210 to smoothly fall into the pocket between the cage 300 and the rolling element 400 along the inclined first guide surface 211.

As shown in fig. 3, in an embodiment, the inclination angle of the first guide surface 211 is larger than the inclination angle of the second guide surface 212. In the present embodiment, the inclination angle of the first guiding surface 211 is larger, which is more beneficial for the lubrication medium accumulated in the guiding groove 210 to flow out along the inclined first guiding surface 211, whereas the inclination angle of the second guiding surface 212 is more beneficial for the lubrication medium to accumulate in the guiding groove 210. Preferably, the inclination angle of the first guide surface 211 is equal to or greater than 60 ° and equal to or less than 90 °.

In addition to the above-mentioned configuration of the guide groove 210, the guide groove 210 may be configured such that the second guide surface 212 on one side is an inclined surface, and the first guide surface 211 on the other side is an arc surface or the like, so long as one side is favorable for accumulating grease, and the other side has a suitable inclination angle to facilitate the accumulated grease to slide down to the pocket side.

Referring to fig. 2, in an embodiment, the seal ring 500 and the inner ring 100 are configured as a non-contact seal structure. The sealing ring 500 and the inner ring sealing groove of the inner ring 100 are arranged to be in non-contact sealing, friction between the sealing ring 500 and the inner ring 100 is reduced on the premise of ensuring tightness, and the sealing ring is suitable for high-rotation-speed working conditions.

Referring to fig. 4 and 6, in some embodiments, an end surface of the cage 300 near the outer ring 200 is provided with a first inclined chamfer 310 inclined toward the rolling body 400, and a channel for conveying a lubrication medium to the pocket is formed between the first inclined chamfer 310 and the first guide surface 211. Wherein fig. 4 illustrates the manner in which the first angled chamfer 310 is disposed when the cage 300 is a non-fully wrapped cage, as can be appreciated in connection with fig. 2. Fig. 6 shows the arrangement of the first inclined chamfer 310 when the cage 300 is a full wrap cage.

Referring to fig. 2, in one embodiment, the cage 300 includes a plurality of sequentially connected C-shaped isolation clasps 330, the C-shaped isolation clasps 330 forming pockets.

Referring to fig. 3, in one embodiment, the pocket includes a middle arc surface 331, a first flat surface 332 and a second flat surface 333 respectively connected to two sides of the middle arc surface 331, a first side arc surface 334 connected to the other side of the first flat surface 332, and a second side arc surface 335 connected to the other side of the second flat surface 333. Therefore, the ball pocket adopts the design of adding one section of straight hole into two sections of arcs on one side, is favorable for loading and unloading the steel balls, can store a part of lubricating grease, improves lubrication and realizes long service life.

Referring to fig. 5 and 6, fig. 5 is a schematic view showing the structure of a four-point contact ball bearing 10 according to another embodiment, which is different from the above embodiment in that the cage 300 includes a plurality of spacer rings 320 connected in series, and the spacer rings 320 form pockets.

Further, referring to fig. 6, a truncated cone structure 350 is disposed at the lower portion of each pocket of the cage 300, and the truncated cone structure 350 forms an angle with a portion of the pocket Kong Zhibi 360, so that a portion of grease is stored in the location, improving lubrication condition inside the bearing, and helping to prolong the service life of the bearing; the angle of the truncated cone-shaped structure 350 can ensure that only the pocket Kong Zhibi is contacted with the steel ball, so that friction between the steel ball and the retainer is reduced, and the method is suitable for high-rotation-speed working conditions. The upper portion of the pocket Kong Zhibi 360 of the cage 300 has a tapered opening 361 to facilitate entry of grease into the pocket for improved lubrication.

In addition, as in the embodiment of fig. 1, the inner ring 100 and the outer ring 200 shown in fig. 5 are provided with teeth, that is, seal grooves, and the seal ring 500 is fitted in the teeth to form a seal cavity a, and the seal cavity a is filled with grease in an amount of 20% -30%. The seal ring 500 is specially designed, is non-contact seal, reduces friction between the seal ring 500 and the inner ring 100 on the premise of ensuring tightness, and is suitable for high-rotation-speed working conditions.

In one embodiment, the raceways of the inner ring 100 and the outer ring 200 are double raceways and the curvature of the raceways is specially designed to ensure two-point contact between the rolling elements 400 and the inner ring 100 and between the rolling elements 400 and the outer ring 200.

Referring to fig. 2, in one embodiment, the end surface of the cage 300 on the side near the outer ring 200 is provided with a second inclined chamfer 340 inclined toward the side of the seal ring 500.

The four-point contact ball bearing 10 can set the retainer 300 as an integral injection molding, adopts PA46-GF30 engineering plastic as a material, has stronger heat resistance and can be suitable for a higher-temperature working environment. Compared with the traditional nylon retainer, the retainer 300 is designed for partial material removal on the basis that the outer diameter is unchanged and the function of the ball pocket is not affected, and specifically, the first inclined chamfer 310 and the second inclined chamfer 340 are cut off for reducing the weight and improving the bearing rotating speed. And the second inclined chamfer 340 is added to the outer end surface, so that the strength of the holder 300 can be increased without interfering with the sealing ring 500.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present utility model, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature. It will be understood that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.

Claims (9)

1. The utility model provides a four-point contact ball bearing, its includes inner circle, outer lane, holder, rolling element and sealing washer, characterized in that: the sealing ring is arranged between the inner ring and the outer ring to form a sealing cavity, the sealing cavity is used for containing lubricating medium, the inner diameter of the outer ring is provided with a guide groove, the guide groove comprises a first guide surface, the first guide surface points to a pocket hole between the retainer and the rolling body, so that when the bearing runs, the guide groove is used for containing the lubricating medium thrown into the guide groove along the sealing ring and conveying at least part of the lubricating medium to the pocket hole along the first guide surface, the retainer comprises a plurality of C-shaped isolation holding rings which are connected in sequence, and the C-shaped isolation holding rings form the pocket hole.

2. A four-point contact ball bearing according to claim 1, wherein: the guide groove is formed at a position close to the rolling body.

3. A four-point contact ball bearing according to claim 1, wherein: the guide groove is a V-shaped guide groove, and the V-shaped guide groove comprises a second guide surface inclined to one side of the sealing ring and a first guide surface inclined to one side of the rolling body.

4. A four-point contact ball bearing according to claim 3, wherein: the first guide surface and the second guide surface meet at a groove bottom intersection line, and the groove bottom intersection line is projected on the retainer along the radial direction of the bearing.

5. A four-point contact ball bearing according to claim 4, wherein: the inclination angle of the first guide surface is larger than that of the second guide surface.

6. A four-point contact ball bearing according to claim 4, wherein: the inclination angle of the first guide surface is more than or equal to 60 degrees and less than or equal to 90 degrees.

7. A four-point contact ball bearing according to claim 1, wherein: the pocket hole comprises a middle arc surface and a first straight surface and a second straight surface which are respectively connected with two sides of the middle arc surface.

8. A four-point contact ball bearing according to claim 1, wherein: the end face of the retainer, which is close to one side of the outer ring, is provided with a first inclined chamfer which is inclined to one side of the rolling body, and a channel for conveying the lubricating medium to the pocket hole is formed between the first inclined chamfer and the first guide surface.

9. A four-point contact ball bearing according to claim 1, wherein: the end face of the retainer, which is close to one side of the outer ring, is provided with a second inclined chamfer which is inclined to one side of the sealing ring.