CN220850398U - Bearing retainer for low-temperature-rise motor - Google Patents

Abstract

The application discloses a bearing retainer for a low temperature rise motor, which comprises a circular ring main body, wherein a plurality of window beams are circumferentially arranged at intervals, an oil groove for storing lubricating grease is arranged on the window beam surface between a first claw part and a second claw part on the end surface of the window beam, so that the grease dissolving space is increased, the capacity of the lubricating grease is improved, the dead weight of the retainer is lightened, a first through hole communicated with a sink groove is arranged on the surface of the window beam, which faces towards the inner ring of a bearing, a second through hole communicated with the sink groove is arranged on the surface, which faces towards the outer ring of the bearing, a third through hole communicated with the sink groove is arranged on the surface, when the bearing rotates at a high speed, the lubricating grease at the position of the inner ring of the bearing can enter the sink groove through the first through hole on the surface of the window beam, the accumulated lubricating grease at the position of the inner ring of the bearing can flow out to the contact surface of the sink groove and the retainer through the third through hole, the contact lubrication between the rolling ball and the sink groove is ensured, and the heat in the pocket is taken away.

Description

Bearing retainer for low-temperature-rise motor

Technical Field

The application belongs to the field of bearing retainers, and particularly relates to a bearing retainer for a low-temperature-rise motor.

Background

In recent years, the high-temperature and high-speed application conditions represented by the new energy driving motor bearing bring higher requirements to the service performance of the bearing, the manufacturing difficulty is greatly increased, the centrifugal force, the strength, the vibration, the abrasion and the like of the retainer at high speed are considered for the product design and the processing of the bearing, the retainer is designed into a crown-shaped or basket-shaped structure in a common method, engineering plastics with the advantages of light weight, small vibration, impact resistance and the like are selected for manufacturing, and the bearing is widely applied to the motor bearing, such as a high-speed motor deep groove ball bearing.

In the process of high-speed rotation of the bearing, the rolling body drives the lubricating grease to rotate due to the viscous action and the centrifugal force action of the lubricating grease in the bearing, the lubricating grease is subjected to the high-speed centrifugal force to move outwards from the inner ring raceway and continuously impacts on the retainer, and accumulated at the outer ring raceway from the gap between the retainer and the steel ball, so that oil shortage between the rolling body and the retainer is possibly caused, the lubricating effect is gradually deteriorated, the rolling body is in a high-temperature running environment of the motor for a long time, the claw opening of the crown-type retainer is possibly softened and deformed, during high-speed running, the rolling body has the tendency of being ejected from the claw opening, the higher the speed is, the higher the generated temperature rise is, the higher the risk is possibly caused, the retainer is possibly lost to be guided, and the bearing is invalid.

Disclosure of utility model

The utility model provides a bearing retainer for a low-temperature-rise motor, which is used for solving the problem that lubricating grease is easy to gather at the outer ring position under the action of centrifugal force under the high-speed working condition of a high-speed bearing, so that the lubrication effect between a rolling body and the retainer is poor, and the temperature rise is rapidly increased.

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

The utility model provides a low temperature rise is bearing retainer for motor, includes ring main part, ring main part circumference interval sets up a plurality of window roof beams, is formed with spherical pocket between adjacent window roof beam, and one side opening in pocket is used for placing the ball, and the terminal surface of window roof beam is equipped with along the outstanding first claw and the second claw that just interval set up of axial, window roof beam terminal surface between first claw and the second claw is sunken to form the heavy groove that is used for the oil storage, and window roof beam is equipped with first through-hole towards bearing inner race one side, and window roof beam is equipped with the second through-hole towards bearing outer lane one side, and window roof beam is equipped with the third through-hole towards the pocket face, first through-hole, second through-hole and third through-hole all communicate the heavy groove.

According to the bearing retainer for the low-temperature-rise motor, the bearing retainer is formed by injection molding of engineering plastics, the oil groove for storing lubricating grease is formed in the window beam surface between the first claw part and the second claw part of the end surface of the window beam, so that on one hand, the grease dissolving space is increased, the capacity of the lubricating grease is improved, the dead weight of the retainer is reduced, and vibration is reduced, on the other hand, the first through hole communicated with the sink groove is formed in the surface of the window beam, which is towards the inner ring of the bearing, the second through hole communicated with the sink groove is formed in the surface of the window beam, the third through hole communicated with the sink groove is formed in the surface of the window beam, when the bearing rotates at a high speed, the lubricating grease at the position of the inner ring of the bearing can enter the sink groove through the first through hole in the window beam surface, the impact force of the part of the lubricating grease on the window beam surface is reduced, the stability of the retainer is improved, the accumulated lubricating grease at the position of the inner ring of the bearing can flow out into the sink groove through the second through the third through hole, contact lubrication between the rolling ball and the pocket is ensured, the heat inside the pocket hole is taken away rapidly, and the claw part of the inner part of the bearing can be prevented from deforming at a high speed when the inner part of the bearing is in the window beam, and the high temperature is prevented from running at a high speed, and the temperature is especially easy to be deformed by the first through the window beam.

Preferably, the sinking groove is provided with a first inlet and a second inlet which are respectively communicated with the first through hole and the second through hole, the position of the first through hole is higher than that of the first inlet, the position of the second through hole is higher than that of the second inlet, the first through hole is in through connection with the first inlet to form a first inclined channel, and the second through hole is in through connection with the second inlet to form a second inclined channel.

The design of first inclined channel and second inclined channel can prevent that heavy inslot lubricating grease from throwing away from first through-hole or second through-hole under centrifugal force effect, makes most lubricating grease flow out through the third through-hole and is used for the lubrication of pocket internal surface and rolling element, and in addition, the design of second inclined channel makes the lubricating grease that is located the outer lane position accumulation more easily enter into heavy inslot from the second inclined channel.

Preferably, the first inclined channel forms a first included angle theta 1 with the horizontal plane, and satisfies that theta 1 is smaller than or equal to 0 degree and smaller than or equal to 3 degrees, and the second inclined channel forms a second included angle theta 2 with the horizontal plane, and satisfies that theta 2 is smaller than or equal to 0 degree and smaller than or equal to 3 degrees.

Preferably, the area of the sinking groove is 5% -8% of the area of the end face area of the window beam, and the depth of the sinking groove is 8% -15% of the height position of the window beam.

When the area and the depth of the sinking groove are higher than the design requirement, the structural strength of the retainer is insufficient, structural damage is easy to occur when the retainer rotates, and when the area and the depth of the sinking groove are lower than the design requirement, the oil storage capacity of the sinking groove is too small, so that the lubrication effect is poor.

Preferably, the first claw portion is constituted by a pair of first ear portions which are mirror-symmetrical and bent toward the adjacent pocket, and the second claw portion is constituted by a pair of second ear portions which are mirror-symmetrical and bent toward the adjacent pocket.

The first ear and the second ear play a role in locking the ball, and the structural design is more reasonable.

Preferably, a gap is arranged between the opposite first lug parts back to the pocket surfaces, the opposite second lug parts back to the pocket surfaces are abutted against each other, the first lug parts are close to the bearing outer ring, and the second lug parts are close to the bearing inner ring.

Preferably, the gap is provided with a guide inclined surface, and the lubricating grease accumulated at the outer ring position of the bearing can flow into the sink groove from the guide inclined surface.

The lubricating grease accumulated at the outer ring position of the bearing can also directly flow into the sink from the guide inclined plane, so that the contact lubrication of the inner surface of the pocket and the rolling bodies is improved.

Preferably, the window beam is integrally injection molded with the annular body.

Preferably, the ring body and the window beam are made of PEEK material.

The PEEK bearing retainer has the characteristics of high temperature resistance, wear resistance, corrosion resistance, self lubrication and the like, has the advantages of light weight, small noise and the like compared with a metal material, and is suitable for the bearing retainer rotating at a high speed.

Drawings

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

FIG. 1 is a schematic perspective view of a bearing holder for a low temperature rise motor according to an exemplary embodiment of the present application;

FIG. 2 is an enlarged schematic view of part A of the embodiment of FIG. 1 according to the present application;

FIG. 3 is a schematic cross-sectional view showing a bearing holder for a low temperature rise motor according to an exemplary embodiment of the present application;

Description of the reference numerals:

10-a ring body; 11-window beams; 12-pocket holes; 13-a first jaw portion; 130-a first ear; 131-guiding ramp; 14-a second jaw portion; 140-a second ear; 15-a sink tank; 16-a first through hole; 17-a second through hole; 18-a third through hole; 19-a first inlet; 20-a second inlet; 21-a first inclined channel; 22-second inclined channel.

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 utility model. Accordingly, the drawings and description are to be regarded as illustrative in nature and not as restrictive.

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

The scheme adopted is as follows:

As shown in fig. 1-3, the utility model provides a bearing retainer for a low temperature rise motor, which comprises a circular ring main body 10, wherein a plurality of window beams 11 are circumferentially arranged at intervals on the circular ring main body 10, spherical pocket holes 12 are formed between adjacent window beams 11, one side of each pocket hole 12 is opened for placing balls, a first claw part 13 and a second claw part 14 which are axially protruded and are arranged at intervals are arranged on the end surface of each window beam 11, a sink 15 for oil storage is formed by recessing the end surface of each window beam 11 between each first claw part 13 and each second claw part 14, a first through hole 16 is formed on one surface of each window beam 11 facing the inner ring of the bearing, a second through hole 17 is formed on one surface of each window beam 11 facing the outer ring of the bearing, a third through hole 18 is formed on one surface of each window beam 11 facing the pocket holes 12, and the first through hole 16, the second through hole 17 and the third through hole 18 are all communicated with the sink 15.

The bearing retainer for the low temperature rise motor is formed by injection molding of engineering plastics, and an oil groove for storing lubricating grease is arranged on the surface of a window beam 11 between a first claw part 13 and a second claw part 14 on the end surface of the window beam 11, so that on one hand, the grease containing space is increased, the capacity of the lubricating grease is improved, the dead weight of the retainer is reduced, and the vibration is reduced, on the other hand, a first through hole 16 communicated with a sink groove 15 is arranged on the surface of the window beam 11 facing the inner ring of the bearing, a second through hole 17 communicated with the sink groove 15 is arranged on the surface of the window beam 11 facing the outer ring of the bearing, a third through hole 18 communicated with the sink groove 15 is arranged on the surface of the window beam 11 facing the pocket hole 12, and when the bearing rotates at high speed, the lubricating grease at the position of the inner ring of the bearing can enter the sink groove 15 through the first through the through hole 16 on the surface of the window beam 11, so as to reduce the impact force of the part of the lubricating grease on the surface of the window beam 11, the stability of the retainer is improved, the accumulated lubricating grease at the position of the bearing inner ring is higher than the position of the second through hole 17, the lubricating grease in the sinking groove 15 can flow out to the contact surface of the pocket 12 and the retainer through the third through hole 18, contact lubrication between the rolling ball and the pocket 12 is ensured, heat in the pocket 12 is quickly taken away, the stability of the shape of the pocket 12 is maintained, meanwhile, the lubricating grease absorbs heat and cools the window beam 11 body, particularly the first claw part 13 and the second claw part 14 when passing through the window beam 11, deformation and softening of the jaw opening of the retainer due to overhigh temperature are prevented, the lubricating effect is improved, the occurrence probability of friction heating phenomenon caused by insufficient lubrication is reduced, and the high-speed operation of the retainer is facilitated.

As a preferred embodiment of the present application, as shown in fig. 3, the sink 15 is provided with a first inlet 19 and a second inlet 20 respectively communicating with the first through hole 16 and the second through hole 17, the first through hole 16 is located higher than the first inlet 19, the second through hole 17 is located higher than the second inlet 20, the first through hole 16 is connected through the first inlet 19 to form a first inclined passage 21, the second through hole 17 is connected through the second inlet 20 to form a second inclined passage 22, and the first inclined passage 21 and the second inclined passage 22 are designed to prevent grease in the sink 15 from being thrown out of the first through hole 16 or the second through hole 17 by centrifugal force when the bearing rotates at a high speed, so that most of the grease flows out of the third through hole 18 for lubrication of the inner surface of the pocket 12 and the rolling bodies, and in addition, the second inclined passage 22 is designed to facilitate grease accumulated at the outer ring position to enter the sink 15 from the second inclined passage 22.

As a preferred example in this embodiment, referring to fig. 3, the first inclined passage 21 forms a first angle θ1 with the horizontal plane, which satisfies 0 ° or more and θ1 or less and 3 °, and the second inclined passage 22 forms a second angle θ2 with the horizontal plane, which satisfies 0 ° or more and θ2 or less and 3 °, and the angles of the first and second inclined passages θ1 and θ2 are within the above ranges, so that the effect of preventing the lubricant from flowing out of the first and second inclined passages 21 and 22 can be achieved, and when the angles of the first and second inclined passages θ1 and θ2 are outside the above ranges, the first and second through holes 16 and 17 are in close contact with the first and second claw portions 13 and 14, which reduces the structural strength of the first and second claw portions 13 and 14.

As a preferred embodiment of the present application, the area of the sink 15 is 5% -8% of the area of the end face area of the window beam 11, and the depth of the sink 15 is 8% -15% of the height position of the window beam 11.

When the area and the depth of the sinking groove 15 are higher than the design requirement, the structural strength of the retainer is easy to be insufficient, structural damage is easy to be generated when the retainer rotates, and when the area and the depth of the sinking groove 15 are lower than the design requirement, the oil storage capacity of the sinking groove 15 is too small, so that the lubrication effect is not good.

As a preferred embodiment of the present application, as shown in fig. 1, the first claw portion 13 is formed by a pair of first ear portions 130 which are mirror-symmetrical and are bent toward the adjacent pocket 12, the second claw portion 14 is formed by a pair of second ear portions 140 which are mirror-symmetrical and are bent toward the adjacent pocket 12, the balls are put into the pocket 12 from the upper side of the pocket 12, the first ear portions 130 and the second ear portions perform a locking function on the balls, and the structural design is more reasonable.

As a preferred embodiment of the present application, referring to fig. 2, a gap is provided between the opposite first lugs 130 facing away from the pocket 12, the opposite second lugs 140 are abutted against the opposite pocket 12, the first lugs 130 are disposed near the outer ring of the bearing, the second lugs 140 are disposed near the inner ring of the bearing, a guiding inclined surface 131 is provided in the gap, and the lubricating grease accumulated at the position of the outer ring of the bearing can also flow from the guiding inclined surface 131 directly into the sink 15, thereby improving the contact lubrication between the inner surface of the pocket 12 and the rolling bodies.

As a preferred embodiment of the present application, the window beam 11 is integrally injection-molded with the ring body 10.

As a preferred example of the present embodiment, the ring body 10 and the window beam 11 are made of PEEK material.

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

In the description of the present utility model, 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 utility model 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 utility model. 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.

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 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 utility model 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 utility model 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 foregoing is merely illustrative of the present utility model, and the present utility model 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 utility model. Therefore, the protection scope of the utility model is subject to the protection scope of the claims.

Claims (9)

1. The utility model provides a low temperature rise is bearing retainer for motor, includes ring main part, ring main part circumference interval sets up a plurality of window roof beams, is formed with spherical pocket between adjacent window roof beam, and one side opening of pocket is used for placing the ball, its characterized in that, the terminal surface of window roof beam is equipped with along the outstanding first claw and the second claw that just interval set up of axial, window roof beam terminal surface sunken formation between first claw and the second claw is used for the heavy groove of oil storage, and window roof beam is equipped with first through-hole towards bearing inner circle one side, and window roof beam is equipped with the second through-hole towards bearing outer lane one side, and window roof beam is equipped with the third through-hole towards the pocket face, first through-hole, second through-hole and third through-hole all communicate the heavy groove.

2. The bearing retainer for a low temperature rise motor according to claim 1, wherein the sinking groove is provided with a first inlet and a second inlet which are respectively communicated with the first through hole and the second through hole, the position of the first through hole is higher than that of the first inlet, the position of the second through hole is higher than that of the second inlet, the first through hole is in through connection with the first inlet to form a first inclined channel, and the second through hole is in through connection with the second inlet to form a second inclined channel.

3. The bearing retainer for a low temperature rise motor according to claim 2, wherein the first inclined passage forms a first angle θ1 with a horizontal plane, satisfying 0 ° - θ1-3 °, and the second inclined passage forms a second angle θ2 with the horizontal plane, satisfying 0 ° - θ2-3 °.

4. The bearing retainer for a low temperature rise motor according to claim 1, wherein the area of the sinking groove is 5% -8% of the area of the end face area of the window beam, and the depth of the sinking groove is 8% -15% of the height position of the window beam.

5. The bearing holder for a low temperature rise motor according to claim 1, wherein the first claw portion is constituted by a pair of first ear portions which are mirror-symmetrical and bent toward the adjacent pocket, and the second claw portion is constituted by a pair of second ear portions which are mirror-symmetrical and bent toward the adjacent pocket.

6. The bearing retainer for a low temperature rise motor of claim 5, wherein a gap is provided between opposite first ear portions facing away from the pocket surface, opposite second ear portions facing away from the pocket surface are in abutment, the first ear portions are disposed adjacent to the outer race of the bearing, and the second ear portions are disposed adjacent to the inner race of the bearing.

7. The bearing retainer for a low temperature rise motor according to claim 6, wherein the gap is provided with a guide slope, and the lubricating grease accumulated at the outer ring position of the bearing can flow from the guide slope into the sink.

8. The bearing retainer for a low temperature rise motor according to claim 1, wherein the window beam is integrally injection-molded with the circular ring body.

9. The bearing retainer for a low temperature rise motor of claim 8, wherein the annular body and the window beam are made of PEEK material.