CN113819144B - Bearing retainer, rolling ball bearing and motor - Google Patents

Bearing retainer, rolling ball bearing and motor Download PDF

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Publication number
CN113819144B
CN113819144B CN202111129430.XA CN202111129430A CN113819144B CN 113819144 B CN113819144 B CN 113819144B CN 202111129430 A CN202111129430 A CN 202111129430A CN 113819144 B CN113819144 B CN 113819144B
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China
Prior art keywords
bearing
sealing
retainer
inner ring
seal
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CN202111129430.XA
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CN113819144A (en
Inventor
郭燕
王瑞东
李峰岩
陈飞龙
陈应翔
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Gree Electric Appliances Inc of Zhuhai
Zhuhai Kaibang Motor Manufacture Co Ltd
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Gree Electric Appliances Inc of Zhuhai
Zhuhai Kaibang Motor Manufacture Co Ltd
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Priority to CN202111129430.XA priority Critical patent/CN113819144B/en
Publication of CN113819144A publication Critical patent/CN113819144A/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/38—Ball cages
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/58—Raceways; Race rings
    • F16C33/583—Details of specific parts of races
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/72—Sealings
    • F16C33/76—Sealings of ball or roller bearings
    • F16C33/78—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
    • F16C33/7803—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members suited for particular types of rolling bearings
    • F16C33/7806—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members suited for particular types of rolling bearings for spherical roller bearings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/72—Sealings
    • F16C33/76—Sealings of ball or roller bearings
    • F16C33/78—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
    • F16C33/7816—Details of the sealing or parts thereof, e.g. geometry, material
    • F16C33/782—Details of the sealing or parts thereof, e.g. geometry, material of the sealing region
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/72—Sealings
    • F16C33/76—Sealings of ball or roller bearings
    • F16C33/78—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
    • F16C33/784—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted to a groove in the inner surface of the outer race and extending toward the inner race
    • F16C33/7843—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted to a groove in the inner surface of the outer race and extending toward the inner race with a single annular sealing disc
    • F16C33/7846—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted to a groove in the inner surface of the outer race and extending toward the inner race with a single annular sealing disc with a gap between the annular disc and the inner race
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/16—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields
    • H02K5/173—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using bearings with rolling contact, e.g. ball bearings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2380/00—Electrical apparatus
    • F16C2380/26—Dynamo-electric machines or combinations therewith, e.g. electro-motors and generators

Abstract

The invention discloses a bearing retainer, a rolling ball bearing and a motor, relates to the technical field of bearings, and aims to solve the problems that an existing motor shaft extension part is installed at the front end of a bearing through an oil seal and is not compact in independent sealing structure, and the oil seal is easy to fall off in the installation process to influence the normal operation of the motor. The bearing retainer comprises a support part along one axial side, a sealing body is coated on the support part and used for plugging a gap between an inner ring and an outer ring of a bearing, a shaft sealing installation hole is formed in the sealing body, and the shaft sealing installation hole and the retainer are coaxially arranged. According to the invention, the bearing retainer is provided with the sealing body, the sealing body is used for plugging a gap between the inner ring and the outer ring of the bearing, the sealing body is provided with the shaft sealing installation hole, and the shaft sealing installation hole is in sealing fit with the shaft extension of the motor shaft, so that the problem that the motor oil seal is easy to fall off is solved.

Description

Bearing retainer, rolling ball bearing and motor
Technical Field
The invention relates to the technical field of bearings, in particular to a bearing retainer, a rolling ball bearing and a motor.
Background
Servo motors are widely used in various fields as driving parts, and are mounted on equipment, and the size of the motor is gradually reduced.
The existing motor adopts an oil seal to seal the motor independently at the shaft extension part of a shell, the oil seal is easy to fall off in the assembling process, oil stains in equipment easily enter the motor to influence the normal operation of the motor in the using process, a common bearing does not have the effect of sealing the shaft extension of the motor, the shaft extension is sealed independently by adopting the oil seal, the oil seal is generally arranged at the front end of the bearing, the axial length of the motor is increased, and the motor is not compact enough.
Disclosure of Invention
In view of the above, the invention discloses a bearing retainer, a rolling ball bearing and a motor, which are used for solving the problems that the conventional motor shaft extension part is provided with an oil seal at the front end of the bearing, the independent sealing structure is not compact, and the oil seal is easy to fall off in the installation process to influence the normal operation of the motor.
In order to achieve the above object, the invention adopts the following technical scheme:
the invention discloses a bearing retainer, which is characterized in that a support part is arranged on one side of the retainer along the axial direction of the retainer, a sealing body is coated on the support part and used for plugging a gap between an inner ring and an outer ring of a bearing, a shaft sealing installation hole is formed in the sealing body, and the shaft sealing installation hole and the retainer are coaxially arranged.
Further optionally, the sealing body has an annular inner ring sealing portion, an annular outer ring sealing portion and an annular end face sealing portion, the inner ring sealing portion and the outer ring sealing portion extend on one side of the end face sealing portion and are located on two sides of the radial direction of the retainer, the inner ring sealing portion is used for being embedded in the inner ring in a sealing manner, and the outer ring sealing portion is used for being embedded in the outer ring in a sealing manner.
Further optionally, the end face sealing part is arranged to protrude from the end face on one side of the bearing.
Further optionally, the support portion is annular and has a radially extending section and an axially extending section, the axially extending section being formed on the cage, the radially extending section being connected to the axially extending section.
Further optionally, the outer ring seal and/or the inner ring seal are labyrinth seals.
Further optionally, the retainer is provided with a plurality of compression springs along the circumferential direction, two ends of each compression spring respectively abut against the sealing body and the retainer, and the axes of the compression springs are parallel to the axis of the retainer.
Further optionally, the retainer is provided with a plurality of guide posts extending along an axial direction of the retainer, and each compression spring is sleeved on each guide post.
Further optionally, one end of the compression spring abuts against the sealing body through a gasket, and the gasket is sleeved on the guide post.
Further optionally, an annular spring is embedded in the sealing body, and the annular spring is coaxially arranged with the shaft sealing mounting hole and is located at the position of the shaft sealing mounting hole.
Further optionally, an inner ring seal is adapted to sealingly engage an outer circumferential surface of the inner ring and an outer ring seal is adapted to sealingly engage an inner circumferential surface of the outer ring.
Further optionally, a first bulge and a second bulge which respectively surround the retainer for one circle are arranged on the sealing body on the same side of the inner ring sealing part; the first bulge is used for being tightly attached to the outer circle surface of the inner ring and covering the embedded position of the inner ring sealing part; the second protrusion is used for being tightly attached to the inner circle surface of the outer ring and covering the embedded position of the outer ring sealing part.
In a second aspect, the invention discloses a rolling ball bearing comprising a bearing cage according to the first aspect.
Further optionally, the rolling ball bearing comprises: an inner ring; the cage is provided with a plurality of pockets along the circumferential direction, and each pocket is internally provided with one ball rolling body; the outer ring is coaxially sleeved on the inner ring, an annular gap is formed between the outer ring and the inner ring, a plurality of ball rolling bodies which are uniformly distributed along the circumferential direction of the annular gap are arranged in the annular gap, and the retainer is arranged in the annular gap.
Further optionally, a first annular sealing groove coaxial with the inner ring is formed in the outer circumferential surface of the inner ring, and the inner ring sealing part of the sealing body is hermetically embedded in the first annular sealing groove; the outer circle surface of outer lane is equipped with rather than coaxial second annular seal groove, the outer lane sealing of seal is embedded sealingly in the second annular seal groove.
Further optionally, the first annular seal groove and the second annular seal groove respectively have three sealing surfaces, the inner ring sealing portion is attached to the three sealing surfaces of the first annular seal groove, and the outer ring sealing portion is attached to the three sealing surfaces of the second annular seal groove.
A third aspect of the invention discloses an electric machine comprising a rolling ball bearing according to the second aspect.
Further optionally, the motor further comprises: the front end of the machine base is provided with a bearing shoulder; the motor shaft is rotatably installed on the base through the rolling ball bearing, an end face sealing part on the bearing retainer is in sealing fit with the retaining shoulder, and the shaft sealing installation hole is in sealing fit with the motor shaft.
Has the advantages that: the bearing retainer is provided with the sealing body, the sealing body is used for plugging a gap between the inner ring and the outer ring of the bearing, the sealing body is provided with the shaft sealing mounting hole, and the shaft sealing mounting hole is in sealing fit with the shaft extension of the motor shaft, so that the problem that the motor oil seal is easy to fall off is solved, meanwhile, the sealing body (oil seal) is coated on the supporting part of the bearing retainer, the problem that the oil seal is easy to fall off when being independently mounted is avoided, meanwhile, the structure is more compact, the length of the motor in the axial direction is shortened, and the manufacturing cost is saved.
Drawings
The above and other objects, features and advantages of the present disclosure will become more apparent by describing in detail exemplary embodiments thereof with reference to the attached drawings. The drawings described below are merely exemplary embodiments of the present disclosure, and other drawings may be derived by those skilled in the art without inventive effort.
FIG. 1 is a schematic diagram of a motor shaft sealed by an oil seal in the prior art;
FIG. 2 is a schematic view showing a retainer applied to a motor bearing seal at a motor shaft extension in embodiment 1 of the present invention;
fig. 3 is a half sectional view showing a cage structure applied to a rolling bearing in embodiment 1 of the present invention;
FIG. 4 is an isometric view of a holder (without a seal body) according to embodiment 1 of the present invention;
fig. 5 is a half sectional view showing another cage structure applied to a rolling bearing in embodiment 1 of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The terminology used in the embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the examples of the present invention and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, and "a" and "an" generally include at least two, but do not exclude at least one, unless the context clearly dictates otherwise.
It should be understood that the term "and/or" as used herein is merely one type of association that describes an associated object, meaning that three relationships may exist, e.g., a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.
It is also noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a good or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such good or system. Without further limitation, an element defined by the phrases "comprising one of 8230; \8230;" 8230; "does not exclude the presence of additional like elements in articles of commerce or systems including such elements.
To further illustrate the technical solution of the present invention, the following specific examples are provided with reference to fig. 1 to 5.
Example 1
In the present embodiment, as shown in fig. 1 to 5, the bearing retainer 10 has a support portion 11 along one axial side thereof, the support portion 11 is covered with a sealing body 12, the sealing body 12 is used for sealing a gap between an inner ring 21 and an outer ring 22 of the bearing 20, the sealing body 12 is provided with a shaft sealing installation hole 121, and the shaft sealing installation hole 121 is coaxially arranged with the bearing retainer 10.
Alternatively, the sealing body may be rubber.
Preferably, an annular spring 50 is embedded in the sealing body 12, and the annular spring 50 is coaxially arranged with the shaft seal mounting hole 121 and is located at the position of the shaft seal mounting hole 121, so that the shaft seal mounting hole 121 and the sealed shaft surface can be attached together.
Specifically, the seal body 12 has an annular inner ring seal portion 122, an annular outer ring seal portion 123, and an annular end face seal portion 124, the inner ring seal portion 122 and the outer ring seal portion 123 extending on one side of the end face seal portion 124 and being located on both sides in the radial direction of the cage 10, the inner ring seal portion 122 being adapted to be sealingly fitted into the inner ring 21, and the outer ring seal portion 123 being adapted to be sealingly fitted into the outer ring 22. Preferably, the inner ring sealing portion 122 is configured to be sealingly embedded in the outer circumferential surface of the inner ring 21 and is disposed near the end surface of the inner ring 21, the outer ring sealing portion 123 is configured to be sealingly embedded in the inner circumferential surface of the outer ring 22 and is disposed near the end surface of the outer ring, and the inner ring sealing portion 122, the outer ring sealing portion 123 and the annular end surface sealing portion 124 enclose a closed annular retainer ring, which can block external dust and oil from the bearing. The motor sealing structure is applied to the bearing of the motor, external dust and oil can be prevented from entering the inner space of the motor, and the sealing body faces the outer side of the bearing of the motor. Meanwhile, the shaft seal mounting hole 121 is matched with a motor shaft, so that oil, dust and the like on the motor connecting equipment can be prevented from entering the motor, the oil seal is manufactured into a structure integrated with the bearing retainer, the problem that the oil seal is easy to drop when being independently mounted is solved, the length of the motor is shortened, and the improvement of the heat dissipation effect of the motor is facilitated. Preferably, the outer ring sealing portion 123 and/or the inner ring sealing portion 122 are labyrinth structures, which can provide axial play and seal to prevent grease leakage during assembly.
Furthermore, the end face sealing part 124 protrudes from an end face of one side of the bearing and can be attached to a front end cover of the motor base to form radial sealing.
In order to further improve the sealing performance of the sealing body 12, in an embodiment of the present invention, as shown in fig. 3, the radially extending section 111 extends to one side of the axially extending section 112, the supporting portion 11 is annular and has the radially extending section 111 and the axially extending section 112, the axially extending section 112 is formed on the retainer 10, the radially extending section 111 is connected to the axially extending section 112, in fig. 3, the shaft seal mounting hole 121 is located in the bearing inner race 21, and a diameter of the shaft seal mounting hole 121 is smaller than an inner diameter of the bearing inner race 21. As shown in fig. 5, in another structure of the support portion 11, the radially extending section 111 extends to both sides of the axially extending section 112, and the shaft seal mounting hole 121 is located outside the bearing inner race 21 in the axial direction in fig. 5. The sealing body 12 is coated on the radial extension section 111 and the axial extension section 112, so that the sealing body 12 can be more firmly fixed on the support part 11 to provide a support force for sealing the sealing body 12, and a rolling body of the bearing can be kept not to move at a preset position. In the structure that the radial extension section 111 extends to one side of the axial extension section 112 in fig. 3, the shaft seal mounting hole 121 is located in the bearing inner ring 21, so that the structure is more compact, the space of the motor is saved, the length of the motor can be made smaller, and the heat dissipation of the motor is facilitated.
Further, the retainer 10 is provided with a plurality of compression springs 30 along the circumferential direction, two ends of each compression spring are respectively abutted against the sealing body 12 and the retainer 10, and the axes of the compression springs 30 are parallel to the axis of the retainer. After the bearing is installed, the compression spring 30 can be compressed to generate pretightening force for the retainer due to the existence of pretightening force, and the axial clearance of the bearing can be adjusted by changing the pretightening force. Specifically, the retainer 10 is provided with a plurality of guide posts 13 extending along the axial direction thereof, and each compression spring 30 is sleeved on each guide post 13. Wherein the length of the guide post 13 should be greater than half the length that the compression spring 30 should compress. Preferably, one end of the compression spring 30 abuts against the sealing body 12 through a gasket 40, and the gasket 40 is sleeved on the guide post 13, so that the acting force is more uniform. Optionally, the compression spring has a pressure range of 10N < F < 100N, depending on the axial load that the bearing can bear.
Further, a first protrusion a and a second protrusion b which respectively surround the retainer 10 for one circle are arranged on the same side of the inner ring sealing part 122 on the sealing body 12; the first protrusion a is used for sealingly fitting to the outer circumferential surface of the inner ring 21 and covering the embedded position of the inner ring sealing part 122; the second projection b is adapted to sealingly engage with the inner circumferential surface of the outer ring 22 and cover the insertion position of the outer ring sealing portion 123. The first protrusion a and the second protrusion b are located at both sides of the holder 10. Alternatively, the inner ring seal portion 122 may be formed to extend on the side of the first projection a toward the inner ring 21. The outer ring seal portion 123 is formed extending on the side of the second projection b toward the outer ring 22.
As shown in fig. 1, for the structure that the motor in the prior art adopts an oil seal to seal at the shaft extension, the front end of the motor supports the sealing structure, and specifically comprises a base 1, a wave-shaped elastic retainer ring 4, an oil seal 5, a rolling ball bearing 3 and a motor shaft 2, wherein the motor shaft 2 is rotatably mounted on the base 1 through the rolling ball bearing 3, a shaft shoulder is arranged on the motor shaft 2, and the shaft shoulder leans against the end of the rolling ball bearing 3The wave-shaped elastic retainer ring 4 is arranged on the end surface of the rolling ball bearing 3, and the distance from the shaft shoulder to the rolling ball bearing 3 is L 1 The thickness of the wave-shaped elastic retainer ring 4 is L 2 The distance from the wave-shaped elastic retainer ring 4 to the end face of the oil seal 5 is L 3 The distance from the end face of the oil seal 5 to the end face of the engine base 1 is L 4 The distance L = L between the shaft shoulder and the end part of the oil seal 1 +L 2 +L 3 +L 4 。
As shown in fig. 2, in the present embodiment, when the shaft seal mounting hole 121 is located in the bearing inner race 21, the distance L from the shoulder to the rolling ball bearing 3 is set 1 The thickness of the sealing member upper end face sealing part 124 is L 2 The distance between the sealing surface of the end surface sealing part 124 and the end surface of the housing 1 is L 3 The distance L = L between the shaft shoulder and the end part of the oil seal 1 +L 2 +L 3 Compared with the prior art, the retainer in the embodiment is applied to the motor, the length of the motor in the axial direction is obviously shortened, the sealing body is coated on the retainer, the problem that the oil seal is easy to fall off during installation is avoided, and the assembly efficiency is improved.
The bearing retainer in the present embodiment is an example of a motor bearing, but the present embodiment is not limited to the application of the bearing retainer to the motor bearing, and may be applied to other bearings, such as a deep groove ball bearing, an angular contact ball bearing, and the like.
Example 2
The invention provides a rolling ball bearing, which comprises the bearing retainer disclosed in embodiment 1.
Specifically, as shown in fig. 3 and 5, the rolling ball bearing further includes: an inner ring 21; the cage 10 is provided with a plurality of pockets c along the circumferential direction, and each pocket c is internally provided with one ball rolling body 23; the outer ring 22 is coaxially sleeved on the inner ring 21, an annular gap is formed between the outer ring 22 and the inner ring 21, a plurality of ball rolling bodies 23 uniformly distributed along the circumferential direction of the annular gap are arranged in the annular gap, and the retainer 10 is arranged in the annular gap.
Further, a first annular seal groove 211 coaxial with the inner ring 21 is formed in the outer circumferential surface of the inner ring, and the inner ring seal portion 122 is hermetically embedded in the first annular seal groove 211; the outer circumferential surface of the outer ring 22 is provided with a second annular seal groove 221 coaxial therewith, and the outer ring seal portion 123 is sealingly embedded in the second annular seal groove 221.
Further, the first annular seal groove 211 and the second annular seal groove 221 have three sealing surfaces, respectively, the inner ring seal portion 122 is attached to the three sealing surfaces of the first annular seal groove 211, and the outer ring seal portion 123 is attached to the three sealing surfaces of the second annular seal groove 221.
The first bulge a blocks the first annular seal groove 211, and the second bulge b blocks the second annular seal groove 221.
Example 3
The present invention provides a motor comprising a rolling ball bearing as described in embodiment 2.
As shown in fig. 2, the motor further includes: the front end of the machine base 1 is provided with a bearing retaining shoulder c; the motor shaft 2 is rotatably mounted on the base 1 through the rolling ball bearing 3, an end face sealing part 124 on the bearing retainer is in sealing fit with the blocking shoulder c, and the shaft sealing mounting hole 121 is in sealing fit with the motor shaft 2.
By the formula:
Figure GDA0003884536070000091
Figure GDA0003884536070000092
where RA-represents the thermal resistance per unit area, δ -represents the thickness of the thermally conductive material, λ -represents the thermal conductivity (thermal conductivity), φ -represents the heat flow through a given area A per unit time, and θ -represents the temperature difference across the thermally conductive material.
According to the formulas (1) and (2), when the thickness (length) of the front end of the casing is reduced, the heat flow of a given area in unit time is increased, heat generated by the winding can be more rapidly transferred to the front flange, the heat dissipation capacity is further expanded, meanwhile, the heat resistance of the front end of the motor is reduced, the heat transfer path is closer to the front end, the temperature rise of the encoder can be effectively reduced, and the structure can reduce the temperature rise of the motor, improve the performance and effectively shorten the length of the motor.
Exemplary embodiments of the present disclosure are specifically illustrated and described above. It is to be understood that the disclosure is not limited to the precise construction, arrangements, or instrumentalities described herein; on the contrary, the disclosure is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.

Claims (16)

1. The bearing retainer is characterized in that the retainer is provided with a supporting part along one axial side of the retainer, a sealing body is coated on the supporting part, the sealing body is provided with an end face sealing part, and the end face sealing part is protruded out of the end face of one side of the bearing and is used for plugging a gap between an inner ring and an outer ring of the bearing; the end face sealing part is provided with a shaft sealing installation hole, the shaft sealing installation hole and the retainer are coaxially arranged, and the part, close to the shaft sealing installation hole, of the end face sealing part is used for plugging a gap between an inner ring of the bearing and a shaft to be sealed.
2. A bearing cage according to claim 1, wherein said seal body further has an annular inner ring seal portion and an annular outer ring seal portion extending on one side of said end face seal portion and located on both sides in a radial direction of said cage, said inner ring seal portion being adapted to be sealingly fitted into said inner ring, said outer ring seal portion being adapted to be sealingly fitted into said outer ring.
3. The bearing cage of claim 2 wherein said support portion is annular having a radially extending section and an axially extending section, said axially extending section being formed on said cage, said radially extending section being connected to said axially extending section.
4. A bearing retainer according to claim 2, wherein the outer ring seal and/or the inner ring seal is a labyrinth seal.
5. The bearing retainer according to claim 2, wherein the retainer is provided with a plurality of compression springs in a circumferential direction, both ends of each compression spring respectively abut against the sealing body and the retainer, and the axes of the compression springs are arranged in parallel with the axis of the retainer.
6. The bearing retainer of claim 5, wherein said retainer has a plurality of guide posts extending axially therealong, and each of said compression springs is received in each of said guide posts.
7. The bearing retainer as in claim 6, wherein one end of said compression spring abuts against said sealing body via a gasket, said gasket fitting over said guide post.
8. The bearing retainer of any one of claims 1-7, wherein an annular spring is embedded in said seal body, said annular spring being disposed coaxially with and at the location of said shaft seal mounting bore.
9. A bearing retainer according to any one of claims 2 to 7, wherein said inner ring seal is adapted to sealingly engage an outer circumferential surface of said inner ring and said outer ring seal is adapted to sealingly engage an inner circumferential surface of said outer ring.
10. The bearing retainer of claim 9, wherein said seal body is provided with first and second projections on the same side of said inner ring seal portion, each of which surrounds a circumference of said retainer;
the first bulge is used for being hermetically attached to the outer circle surface of the inner ring and covering the embedded position of the inner ring sealing part;
the second protrusion is used for being tightly attached to the inner circle surface of the outer ring and covering the embedded position of the outer ring sealing part.
11. A rolling ball bearing comprising a bearing cage according to any one of claims 1 to 10.
12. A rolling ball bearing as claimed in claim 11, wherein the rolling ball bearing comprises:
an inner ring;
the cage is provided with a plurality of pockets along the circumferential direction, and each pocket is internally provided with one ball rolling body;
the outer ring is coaxially sleeved on the inner ring, an annular gap is formed between the outer ring and the inner ring, a plurality of ball rolling bodies which are uniformly arranged along the circumferential direction of the annular gap are arranged in the annular gap, and the retainer is arranged in the annular gap.
13. A rolling ball bearing as claimed in claim 12 wherein said inner ring outer circumferential surface is provided with a first annular seal groove coaxial therewith, said inner ring seal portion of said seal body being sealingly embedded in said first annular seal groove; the outer circle surface of outer lane is equipped with rather than coaxial second annular seal groove, the outer lane sealing of seal is embedded sealingly in the second annular seal groove.
14. A rolling ball bearing as claimed in claim 13 wherein each of said first and second annular seal grooves has three sealing surfaces, said inner ring seal portion engages said three sealing surfaces of said first annular seal groove, and said outer ring seal portion engages said three sealing surfaces of said second annular seal groove.
15. An electrical machine comprising a rolling ball bearing according to any of claims 11 to 14.
16. The electric machine of claim 15, further comprising:
the front end of the machine base is provided with a bearing shoulder;
the motor shaft is rotatably installed on the base through the rolling ball bearing, an end face sealing part on the bearing retainer is in sealing fit with the retaining shoulder, and the shaft sealing installation hole is in sealing fit with the motor shaft.
CN202111129430.XA 2021-09-26 2021-09-26 Bearing retainer, rolling ball bearing and motor Active CN113819144B (en)

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Application Number Priority Date Filing Date Title
CN202111129430.XA CN113819144B (en) 2021-09-26 2021-09-26 Bearing retainer, rolling ball bearing and motor

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Application Number Priority Date Filing Date Title
CN202111129430.XA CN113819144B (en) 2021-09-26 2021-09-26 Bearing retainer, rolling ball bearing and motor

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CN113819144B true CN113819144B (en) 2022-12-13

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Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN203477090U (en) * 2013-09-23 2014-03-12 温州静音轴承有限公司 Special bearing provided with oil seal for hydraulic motor
CN203822857U (en) * 2014-04-02 2014-09-10 新昌县双菱汽车轴承有限公司 Bearing with retaining frame with oil-sealing function
FR3035929B1 (en) * 2015-05-04 2017-11-03 Skf Ab BEARING COMPRISING AN ELASTIC SEALING FLANGE
IT201600119828A1 (en) * 2016-11-28 2018-05-28 Skf Ab VOLVENTIC BEARING WITH IMPROVED SEALING DEVICE
CN206320185U (en) * 2016-12-19 2017-07-11 人本集团有限公司 A kind of new ball bearing
CN213744483U (en) * 2020-10-15 2021-07-20 慈溪市新中天轴承有限公司 Deep groove ball bearing

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