CN117469304A - Sealed ball bearing retainer - Google Patents

Abstract

The application discloses sealed ball bearing holder, including injection moulding's round roof beam, and connect the window roof beam between two round roof beams, form the pocket hole that is used for holding the ball between the adjacent window roof beam, the internal surface in pocket hole forms at least one domatic by bearing inner race towards bearing outer lane direction, thereby the domatic climbing energy dissipation of rolling element through pocket hole internal surface when bearing outer lane removes under centrifugal force effect, weaken the impact potential energy of rolling element to the holder, window roof beam part comprises inboard window roof beam and outside window roof beam, the wall thickness between holder and the pocket hole has been increaseed, the parcel nature of holder pocket hole to the ball has been promoted, the intensity and the stability of pocket hole when making the difficult assurance holder high-speed high temperature operation of coming off, the anti collision of holder has been strengthened, the impact capacity, the design of "one increase one and subtract" has prolonged the life of holder under the high-speed rotation service condition.

Description

Sealed ball bearing retainer

Technical Field

The application belongs to the field of bearing retainers, and particularly relates to a sealing type ball bearing retainer.

Background

The ball bearing can keep good movement at a higher rotating speed, the premise is that the retainer also has good state, one of the main reasons of failure of the ball bearing which rotates at a high speed is that after the retainer is worn, the clearance is increased, the instability of the movement of the retainer is aggravated under the action of impact load, when the ball bearing rotates at a high speed, due to the action of centrifugal force, the rolling bodies and lubricating grease have tendency to be thrown outwards, the higher the rotating speed is, the more obvious the tendency of throwing outwards is, the steel ball is caused to lead or lag the retainer, the rolling bodies and the lubricating grease are caused to continuously collide and impact the retainer, the retainer is caused to extremely high abrasion, even the breakage of a window beam is caused, and the ball falling phenomenon can occur in serious cases, so that the structural characteristic of the retainer is always one of important factors which must be considered in the design of the high-speed precise bearing, the anti-collision and impact capacity of the retainer are enhanced, the impact potential energy of the rolling bodies when the rolling bodies rotates at a high speed is weakened, the flow of lubricating grease is enhanced, and the retainer is prevented from being prematurely failed, and the service life is prolonged.

Disclosure of Invention

The invention provides a sealed ball bearing retainer, which is used for solving the problems that the retainer is worn out or even broken too early due to high collision and impact potential energy of rolling bodies on the retainer of a ball bearing rotating at a high speed.

In order to achieve the above purpose, the present invention provides the following technical solutions:

the utility model provides a sealed ball bearing holder, includes injection molding's circle roof beam and connects the window roof beam between two circle roof beams, forms the pocket hole that is used for holding the ball between the adjacent window roof beam, and the internal surface in pocket hole forms at least one domatic towards the bearing outer lane direction by the bearing inner race, and the ball moves through domatic energy dissipation towards the bearing outer lane direction, weakens the collision impact potential energy to the holder.

According to the sealed ball bearing retainer disclosed by the invention, the inner surface of the pocket hole is provided with the slopes with different slopes from the inner ring of the bearing towards the outer ring of the bearing, when the bearing runs at a high speed, the rolling bodies pass through the slopes on the inner surface of the pocket hole when moving towards the outer ring of the bearing under the action of centrifugal force, so that the energy is dissipated by climbing, the impact potential energy of the rolling bodies on the retainer is weakened, and the service life of the retainer under the condition of high-speed rotation is prolonged.

Preferably, the inner surface of the pocket hole is sequentially provided with a first section of slope, a second section of slope and a third section of slope from the outer ring of the bearing to the inner ring of the bearing, and the slopes of the three sections of slopes are gradually reduced.

When the bearing runs at a high speed, the rolling bodies gradually rise gradually through the slope surface with gradually increased gradient when moving towards the outer ring of the bearing under the action of centrifugal force, and the rolling bodies gradually rise to eliminate a part of impact potential energy at each section, so that a better climbing energy dissipation effect is achieved.

Preferably, the slope angle a1 of the first section slope surface satisfies 1 DEG & lt a1 & ltoreq.1.5 DEG, the slope angle a2 of the second section slope surface satisfies 0.5 DEG & lt a2 & ltoreq.1 DEG, and the slope angle a3 of the third section slope surface satisfies 0.1 DEG & ltoreq.a3 & ltoreq.0.5 deg.

When the slope angles of a1, a2 and a3 satisfy the above ranges, the bearing life in the high rotation speed operation state is longer, whereas when the slope angles of a1, a2 and a3 are not within the above ranges, too small a play between the pockets and the balls or too small a toe may be generated due to too large a slope angle, which may cause an insignificant effect of climbing and energy dissipation, in contrast to the shorter bearing life.

Preferably, a first circular bead convex part is arranged at the joint position of the first section slope and the second section slope, and a first oil-retaining sink is arranged at the joint position of the second section slope and the third section slope.

The first fillet convex part can stop when the rolling body moves from the second section slope to the third section slope, and plays a role in buffering and locking, and the arc-shaped fillet convex part can not damage the spherical surface when contacting with the rolling body, so that the rolling body is protected. When the bearing rotates at a high speed, the lubricating grease moves towards the direction of the outer ring of the bearing under the action of centrifugal force, and when the lubricating grease passes through the gap between the rolling body and the retainer, the lubricating grease can be partially intercepted in the first oil-retaining sink, so that the storage quantity of the lubricating grease at the position is improved, and the contact lubrication between the rolling ball and the pocket is ensured.

Preferably, the ring beam comprises an inner ring and an outer ring, the inner ring is connected with an inner side window beam which is uniformly distributed in the circumferential direction, the outer ring is connected with an outer side window beam which is uniformly distributed in the circumferential direction, an inner circular arc groove is formed between the adjacent inner side window beam and the inner ring, an outer circular arc groove is formed between the adjacent outer side window beam and the outer ring, the inner side window beam is equal in number with the outer side window beam, the outer side window beam is fixedly arranged on the outer surface of the inner side window beam, and the pocket holes are formed between the inner circular arc groove and the notch of the outer circular arc groove in a staggered manner so as to promote the wrapping property of the pocket holes on the balls.

The window beam part is composed of an inner window beam and an outer window beam, so that the wall thickness between the retainer and the pocket hole is increased, the wrapping property of the retainer pocket hole on the ball is improved, the ball is not easy to fall off, the strength and the stability of the pocket hole are ensured when the retainer runs at high speed and high temperature, and the anti-collision and impact capacity of the retainer are enhanced.

Preferably, the inner surface of the outer circular arc groove is provided with the first section of slope, the second section of slope and the third section of slope from the outer ring of the bearing to the inner ring of the bearing; the inner surface of the inner circular arc groove is provided with a fourth section of slope, a fifth section of slope and a sixth section of slope in the direction from the bearing inner ring to the bearing outer ring, wherein the fifth section of slope and the sixth section of slope are lower slopes with gradually reduced slopes, the fourth section of slope is an upper slope, the slopes of the fourth section of slope and the fifth section of slope are the same, the slopes of the fifth section of slope and the second section of slope are the same, and the slopes of the sixth section of slope and the third section of slope are the same.

Preferably, a second circular bead convex part is arranged at the joint position of the fourth section slope and the fifth section slope, and a second oil-retaining sink is arranged at the joint position of the fifth section slope and the sixth section slope.

During assembly, the rolling ball enters from the outer-expanded fourth-section slope, the circular arc diameter corresponding to the outer-expanded fourth-section slope is larger than the diameter of the rolling ball, alignment installation of the rolling ball is facilitated, the rolling ball is installed through the fifth-section slope and the sixth-section slope after entering from the fourth-section slope, the fifth-section slope serves as a locking surface of the rolling ball from the direction of the outer ring of the bearing to the direction of the inner ring of the bearing, the sixth-section slope is not contacted with the rolling ball, the contact area of the rolling ball and the inner surface of the pocket is reduced, and flow lubrication of grease is facilitated.

Preferably, a first inclined plane is arranged at one end of the inner side window beam, which is away from the inner ring, and extends to a plane where the outer ring is provided with the outer side window beam; the one end that the outside window roof beam deviates from the outer lane is equipped with the second inclined plane, and the second inclined plane extends to the inner circle and sets up the plane that inside window roof beam is located.

The design of the first inclined plane and the second inclined plane balances the mass center of the retainer, and the inclined plane design can reduce the weight of the retainer so as to reduce vibration.

Preferably, the slope surface is a curved slope with a radian on the surface, and the radian of the curved slope is matched with the radian of the ball.

The structure has the following beneficial effects:

1. according to the sealed ball bearing retainer disclosed by the invention, the inner surface of the pocket hole is provided with the upward slopes with different slopes, which are continuous from the inner ring of the bearing to the outer ring of the bearing, when the bearing runs at a high speed, the rolling bodies pass through the slopes on the inner surface of the pocket hole when moving towards the outer ring of the bearing under the action of centrifugal force, so that the energy is dissipated by climbing, the impact potential energy of the rolling bodies on the retainer is weakened, and the service life of the retainer under the condition of high-speed rotation is prolonged.

2. The window beam part of the sealed ball bearing retainer consists of the inner window beam and the outer window beam, so that the wall thickness between the retainer and the pocket hole is increased, the wrapping property of the pocket hole of the retainer on the balls is improved, the balls are not easy to fall off, the strength and the stability of the pocket hole of the retainer are ensured during high-speed high-temperature operation of the retainer, and the anti-collision and impact capabilities of the retainer are enhanced.

3. According to the sealed ball bearing retainer disclosed by the invention, the joint position of the first section slope surface and the second section slope surface is provided with the first round angle convex part, the joint position of the second section slope surface and the third section slope surface is provided with the first oil retaining sink, the joint position of the fourth section slope surface and the fifth section slope surface is provided with the second round angle convex part, the joint position of the fifth section slope surface and the sixth section slope surface is provided with the second oil retaining sink, the arc-shaped round angle convex part does not damage a spherical surface when contacting with a rolling body, the rolling body is protected, and when the bearing rotates at a high speed, lubricating grease moves towards the direction of the outer ring of the bearing under the action of centrifugal force, and when the lubricating grease passes through a gap between the rolling body and the retainer, a part of lubricating grease can be intercepted in the oil retaining sink, so that the storage quantity of the lubricating grease at the position is improved, and the contact lubrication between the rolling ball and a pocket is ensured.

4. According to the sealed ball bearing retainer disclosed by the invention, the third section slope surface and the sixth section slope surface are in dislocation symmetry, the second section slope surface and the fifth section slope surface form dislocation symmetry, the balls normally run on the second section slope surface and the fifth section slope surface, and the dislocation symmetry slope surfaces of the inner surfaces of the pockets are beneficial to the high-speed running of the rolling balls to be more stable and the stability of the shapes of the pockets to be maintained.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the present application and do not constitute a limitation on the invention. In the drawings:

FIG. 1 is a schematic perspective view of one illustrative embodiment of a seal ball bearing retainer of the present application;

FIG. 2 is a first partial enlarged schematic view of the seal ball bearing cage of the present application;

FIG. 3 is a second partial enlarged schematic view of the seal ball bearing retainer of the present application;

fig. 4 shows a third partial enlarged schematic view of the seal ball bearing cage of the present application.

Description of the reference numerals:

10-an inner ring; 11-an inboard window beam; 110-a first incline; 111-inner circular arc grooves; 12-an outer ring; 13-outboard window beams; 130-a second ramp; 131-an outer circular arc groove; 14-a first section of slope; 15-a second section of slope; 16-third section of slope; 17-a first rounded protrusion; 18-a first oil-retaining sink; 19-a fourth section of slope; 20-a fifth section of slope; 21-sixth section of slope; 22-second rounded protrusions; 23-a second oil-retaining sink; 24-flanging; 25-annular boss.

Detailed Description

Hereinafter, only certain exemplary embodiments are briefly described. As will be recognized by those of skill in the pertinent art, the described embodiments may be modified in various different ways without departing from the spirit and scope of the present invention. Accordingly, the drawings and description are to be regarded as illustrative in nature and not as restrictive.

In the description of the present invention, it should be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," "circumferential," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate describing the present invention and simplify the description, and do not indicate or imply that the devices or elements 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 invention. In the present invention, 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.

In the present invention, 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 directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. However, it is noted that a direct connection indicates that two bodies connected together do not form a connection relationship by an excessive structure, but are connected to form a whole by a connection structure. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

The description as it relates to "first", "second", etc. in the present invention is for descriptive purposes only and is 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.

The present invention will be described below with reference to the drawings.

The scheme adopted is as follows:

as shown in fig. 1-4, the invention provides a sealed ball bearing retainer, which comprises ring beams integrally molded by injection molding and window beams connected between two ring beams, wherein pockets for accommodating balls are formed between adjacent window beams, at least one slope is formed on the inner surface of each pocket from a bearing inner ring 10 towards a bearing outer ring 12, when the bearing runs at a high speed, rolling bodies pass through the slope on the inner surface of each pocket when moving towards the bearing outer ring 12 under the action of centrifugal force, so that the energy is dissipated by climbing, the impact potential energy of the rolling bodies on the retainer is weakened, and the service life of the retainer under the high-speed rotation using condition is prolonged.

As a preferred embodiment of the present application, referring to fig. 2, the inner surface of the pocket hole is sequentially provided with a first section of slope 14, a second section of slope 15 and a third section of slope 16 from the bearing outer ring 12 to the bearing inner ring 10, the slopes of the three sections of slopes gradually decrease, when the bearing runs at high speed, the rolling bodies gradually increase gradually through the slopes when moving towards the bearing outer ring 12 under the centrifugal force, so as to achieve continuous and effective energy dissipation effect, enable the rolling bodies to return after energy dissipation, keep normal rotation, the outermost first section of slope 14 is used as the last line of defense of the rolling bodies along the radial direction, plays a final locking role, can prevent the rolling bodies from falling, and the innermost third section of slope 16 is not contacted with the rolling bodies, reduces the contact area between the rolling balls and the inner surface of the pocket hole, is beneficial to the flow of grease, wherein the first section of slope 14, the second section of slope 15 and the third section of slope 16 are smooth curved surfaces, and the friction resistance between the rolling bodies can be reduced.

As a first preferred example in this embodiment, the slope angle a1 of the first slope 14 satisfies 1 DEG < a1.ltoreq.1.5 DEG and the slope angle a2 of the second slope 15 satisfies 0.5 DEG < a2.ltoreq.1 DEG and the slope angle a3 of the third slope 16 satisfies 0.1 DEG.ltoreq.a3.ltoreq.0.5 deg.

When the angles of a1, a2 and a3 are not within the above range, an axial play between the pocket and the ball may be generated due to the too large angle of the slope or the climbing energy dissipation effect may be insignificant due to the too small angle of the slope, in contrast, when the angles of a1, a2 and a3 satisfy the above range, the play distance is moderate, the climbing energy dissipation effect is significant, and the service life of the bearing in a high-rotation-speed working state is longer.

As a second preferred example in this embodiment, as shown in fig. 2, a first rounded protrusion 17 is provided at the junction of the first slope 14 and the second slope 15, a first oil-retaining groove 18 is provided at the junction of the second slope 15 and the third slope 16, the first rounded protrusion 17 is capable of buffering when the rolling element climbs from the second slope 15 to the third slope 16, the curved rounded protrusion does not damage the spherical surface when contacting the rolling element, the rolling element is protected, and when the bearing rotates at high speed, the lubricating grease moves toward the bearing outer ring 12 due to centrifugal force, and when passing through the gap between the rolling element and the cage, the lubricating grease is partially trapped in the first oil-retaining groove 18, thereby increasing the storage amount of the lubricating grease at the junction and ensuring the contact lubrication between the rolling ball and the pocket.

As a second preferred example in this embodiment, the ring beam includes an inner ring 10 and an outer ring 12, the inner ring 10 is connected with an inner window beam 11 which is uniformly distributed in the circumferential direction, the outer ring 12 is connected with an outer window beam 13 which is uniformly distributed in the circumferential direction, an inner circular arc groove 111 is formed between the adjacent inner window beam 11 and the inner ring 10, an outer circular arc groove 131 is formed between the adjacent outer window beam 13 and the outer ring 12, the number of the inner window beam 11 and the outer window beam 13 are equal, the outer window beam 13 is fixedly arranged on the outer surface of the inner window beam 11, the notches of the inner circular arc groove 111 and the outer circular arc groove 131 are staggered and oppositely form a pocket hole, the window beam part is composed of the inner window beam 11 and the outer window beam 13, the wall thickness between the retainer and the pocket hole is increased, the wrapping property of the retainer pocket hole on balls is improved, the balls are not easy to fall off, the strength and stability of the pocket hole are ensured when the retainer runs at high speed and high temperature, and the collision resistance and the impact resistance of the retainer are enhanced.

In addition, one end of the inner ring 10 radially extends to form a folded edge 24, an annular boss 25 is arranged at the edge of the folded edge 24, the annular boss 25, the folded edge 24 and the inner ring 10 form an oil storage space, the oil storage capacity is increased, and good lubricity of the position of the bearing inner ring 10 is ensured.

As a preferred scheme under this embodiment, as shown in fig. 3, the inner surface of the inner circular arc groove 111 is provided with an upper slope and a lower slope of the bearing inner ring 10 towards the bearing outer ring 12, the upper slope includes a fourth slope 19, the lower slope includes a fifth slope 20 and a sixth slope 21, the slope of the fourth slope 19 is equal to that of the fifth slope 20, the slope of the sixth slope 21 is smaller than that of the fifth slope 20, during assembly, a rolling ball enters from the fourth slope 19 which expands outwards, the corresponding circular arc diameter of the fourth slope 19 which expands outwards is larger than that of the rolling ball, the rolling ball is conveniently installed in an aligning manner, the rolling ball is installed through the fifth slope 20 and the sixth slope 21 after entering from the fourth slope 19, the fifth slope 20 is used as a locking surface of the rolling ball towards the bearing inner ring 10 from the bearing outer ring 12, the sixth slope 21 is not contacted with the rolling ball, the contact area of the rolling ball is reduced, the rolling ball is favorable for flow lubrication of grease, the rolling ball is favorable for the rolling ball, the rolling ball is symmetric to the fourth slope 16 and the sixth slope 21, the rolling ball is more smoothly run in the symmetric to the slope 20, the rolling ball is formed in the upper slope 20, and the rolling ball is more symmetric to the slope 20 is more stable, and the rolling ball is in the dislocation, and the rolling ball is in the upper slope 20 is more symmetric, and the slope is better in the rolling ball, and the rolling ball is in the plane, and the dislocation and the slope 20 is more smooth and the surface.

Further, the second round corner convex part 22 is arranged at the joint position of the fourth section slope surface 19 and the fifth section slope surface 20, the second oil retaining sink 23 is arranged at the joint position of the fifth section slope surface 20 and the sixth section slope surface 21, when the bearing rotates at a high speed, the lubricating grease moves towards the bearing outer ring 12 under the action of centrifugal force, when the lubricating grease passes through the gap between the rolling body and the retainer, the lubricating grease can be partially intercepted in the second oil retaining sink 23, the storage quantity of the lubricating grease at the position is improved, and the contact lubrication between the rolling ball and the pocket is ensured.

As a preferable scheme in this embodiment, a first inclined plane 110 is provided at one end of the inner side window beam 11 facing away from the inner ring 10, and the first inclined plane 110 extends to a plane where the outer ring 12 is provided with the outer side window beam 13; the outer side window beam 13 is provided with a second inclined plane 130 at one end far away from the outer ring 12, the second inclined plane 130 extends to the plane where the inner side window beam 11 is arranged on the inner ring 10, so that the mass center of the retainer is balanced, and the weight of the retainer can be reduced by the inclined plane design so as to reduce vibration.

The invention can be realized by adopting or referring to the prior art at the places which are not described in the invention.

The foregoing is merely illustrative of the present invention, and the present invention is not limited thereto, and any person skilled in the art will readily recognize that various modifications and substitutions are possible within the scope of the present invention. Therefore, the protection scope of the invention is subject to the protection scope of the claims.

Claims (9)

1. The utility model provides a sealed ball bearing holder, includes injection molding's circle roof beam and connects the window roof beam between two circle roof beams, forms the pocket hole that is used for holding the ball between the adjacent window roof beam, its characterized in that, the internal surface in pocket hole forms at least one domatic by bearing inner race towards bearing outer lane direction, and the ball moves through domatic energy dissipation towards bearing outer lane direction, weakens the collision impact potential energy to the holder.

2. The sealed ball bearing retainer according to claim 1, wherein the inner surface of the pocket is provided with a first slope, a second slope and a third slope in order from the outer ring of the bearing toward the inner ring of the bearing, and the slopes of the third slope gradually decrease.

3. A sealed ball bearing cage according to claim 2, characterized in that the slope angle a1 of the first slope satisfies 1 ° < a1.ltoreq.1.5° and the slope angle a2 of the second slope satisfies 0.5 ° < a2.ltoreq.1° and the slope angle a3 of the third slope satisfies 0.1 ° -a3.ltoreq.0.5°.

4. The sealed ball bearing retainer of claim 2, wherein the junction of the first slope and the second slope is provided with a first rounded protrusion, and the junction of the second slope and the third slope is provided with a first oil-retaining sink.

5. The sealed ball bearing retainer according to claim 2, wherein the ring beam comprises an inner ring and an outer ring, the inner ring is connected with an inner side window beam which is uniformly distributed in the circumferential direction, the outer ring is connected with an outer side window beam which is uniformly distributed in the circumferential direction, an inner circular arc groove is formed between the adjacent inner side window beam and the inner ring, an outer circular arc groove is formed between the adjacent outer side window beam and the outer ring, the inner side window beam and the outer side window beam are equal in number, the outer side window beam is fixedly arranged on the outer surface of the inner side window beam, and the notches of the inner circular arc groove and the outer circular arc groove are staggered and form the pocket hole oppositely so as to improve the wrapping property of the pocket hole on the balls.

6. The sealed ball bearing retainer according to claim 5, wherein the first slope, the second slope and the third slope are provided on the inner surface of the outer circular arc groove from the outer ring of the bearing toward the inner ring of the bearing; the inner surface of the inner circular arc groove is provided with a fourth section of slope, a fifth section of slope and a sixth section of slope in the direction from the bearing inner ring to the bearing outer ring, wherein the fifth section of slope and the sixth section of slope are lower slopes with gradually reduced slopes, the fourth section of slope is an upper slope, the slopes of the fourth section of slope and the fifth section of slope are the same, the slopes of the fifth section of slope and the second section of slope are the same, and the slopes of the sixth section of slope and the third section of slope are the same.

7. The sealed ball bearing retainer of claim 6, wherein a second rounded protrusion is disposed at a junction of the fourth slope and the fifth slope, and a second oil-retaining sink is disposed at a junction of the fifth slope and the sixth slope.

8. The sealed ball bearing retainer of claim 5, wherein a first inclined surface is formed at one end of the inner side window beam, which is away from the inner ring, and the first inclined surface extends to a plane where the outer ring is provided with the outer side window beam; the one end that the outside window roof beam deviates from the outer lane is equipped with the second inclined plane, and the second inclined plane extends to the inner circle and sets up the plane that inside window roof beam is located.

9. The sealed ball bearing retainer of claim 1 wherein the ramp is a curved ramp having a curvature on a surface, the curvature of the curved ramp matching the curvature of the ball.