CA2608731A1 - Unitized full complement 4-point angular contact ball bearing - Google Patents
Unitized full complement 4-point angular contact ball bearing Download PDFInfo
- Publication number
- CA2608731A1 CA2608731A1 CA 2608731 CA2608731A CA2608731A1 CA 2608731 A1 CA2608731 A1 CA 2608731A1 CA 2608731 CA2608731 CA 2608731 CA 2608731 A CA2608731 A CA 2608731A CA 2608731 A1 CA2608731 A1 CA 2608731A1
- Authority
- CA
- Canada
- Prior art keywords
- circumferential
- portions
- bearing
- retainer
- ball bearing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
Classifications
-
- 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
- F16C33/60—Raceways; Race rings divided or split, e.g. comprising two juxtaposed rings
-
- 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
- F16C19/00—Bearings with rolling contact, for exclusively rotary movement
- F16C19/02—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows
- F16C19/14—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load
- F16C19/16—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with a single row of balls
- F16C19/163—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with a single row of balls with angular contact
-
- 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
- F16C43/00—Assembling bearings
- F16C43/04—Assembling rolling-contact bearings
Abstract
A unitized full complement four point angular contact ball bearing, includes an outer race, an inner race and a plurality of rolling elements positioned between the outer race and the inner race. One of the outer race or the inner race consists of two portions. Each of the two portions includes an engagement for engaging a circumferential retainer. A
circumferential retainer on one of an inside circumference or an outside circumference serves to retain the two portions.
circumferential retainer on one of an inside circumference or an outside circumference serves to retain the two portions.
Description
TITLE:
Unitized full complement 4-point angular contact ball bearing FIELD
The present invention relates to the unification of a full complement 4-point angular contact ball bearing.
BACKGROUND
Full complement ball bearings eliminate the cost associated with bearing cages, and enable bearings to operate more efficiently in abrasive environments such as oilfield downhole tools lubricated with drilling mud. However, many traditional designs require that either the inner or outer race be split circumferentially in order to assemble the bearing. This causes a problem in handling the bearings as the balls could fall out if the two piece race combination is not held tightly together during shipping, handling, installation, or future tool maintenance. Unitizing the assembly to prevent the balls from falling out is a common problem. Traditional attempts to hold the mating faces together include temporary tie wires, mechanical tabs, or some other localized mechanical clamping devise. These methods have not proven very successful in rugged applications like those found in oilfield machinery;
particularly where future maintenance is performed and the bearings are to be reused. These methods also require additional manufacturing cost and complex assembly tooling.
SUMMARY
There is provided a unitized full complement four point angular contact ball bearing, which includes an outer race, an inner race and a plurality of rolling elements positioned between the outer race and the inner race. One of the outer race or the inner race consists of two portions. Each of the two portions includes means for engaging a circumferential retainer. A circumferential retainer on one of an inside circumference or an outside circumference serves to retain the two portions.
BRIEF DESCRIPTION OF THE DRAWINGS
Unitized full complement 4-point angular contact ball bearing FIELD
The present invention relates to the unification of a full complement 4-point angular contact ball bearing.
BACKGROUND
Full complement ball bearings eliminate the cost associated with bearing cages, and enable bearings to operate more efficiently in abrasive environments such as oilfield downhole tools lubricated with drilling mud. However, many traditional designs require that either the inner or outer race be split circumferentially in order to assemble the bearing. This causes a problem in handling the bearings as the balls could fall out if the two piece race combination is not held tightly together during shipping, handling, installation, or future tool maintenance. Unitizing the assembly to prevent the balls from falling out is a common problem. Traditional attempts to hold the mating faces together include temporary tie wires, mechanical tabs, or some other localized mechanical clamping devise. These methods have not proven very successful in rugged applications like those found in oilfield machinery;
particularly where future maintenance is performed and the bearings are to be reused. These methods also require additional manufacturing cost and complex assembly tooling.
SUMMARY
There is provided a unitized full complement four point angular contact ball bearing, which includes an outer race, an inner race and a plurality of rolling elements positioned between the outer race and the inner race. One of the outer race or the inner race consists of two portions. Each of the two portions includes means for engaging a circumferential retainer. A circumferential retainer on one of an inside circumference or an outside circumference serves to retain the two portions.
BRIEF DESCRIPTION OF THE DRAWINGS
These and other features will become more apparent from the following description in which reference is made to the appended drawings, the drawings are for the purpose of illustration only and are not intended to in any way limit the scope of the invention to the particular embodiment or embodiments shown, wherein:
FIG. 1 is a side elevation view, partially in section, of a full complement four point angular contact ball bearing with the outer race split circumferentially into two portions.
FIG. 2 is a section view along the A-A section line of FIG. 1.
FIG. 3 is a more detailed side elevation view of the ball bearing of FIG. 2.
FIG. 4 is a side elevation view, partially in section, of a full complement four point angular contact ball bearing with the inner race split circumferentially into two portions.
FIG. 5 is a section view along the B-B section line of FIG. 4.
FIG. 6 is a more detailed side elevation view of the ball bearing of FIG. 5.
DETAILED DESCRIPTION
A unitized full complement four point angular contact ball bearing generally identified by reference numeral 10, will now be described with reference to FIG. 1 through FIG.6.
Structure and Relationship of Parts:
Referring to FIG. 1, a unitized full complement four point angular contact ball bearing 10 is illustrated consisting of an outer race 12, an inner race 14 and a plurality of rolling elements. Referring to FIG. 3, a circumferential retainer 18 prevents separation of outer race 12 and inner race 14. In the embodiment shown in FIG. 2, outer race 12 consists of a first portion 20 and a second portion 22. Referring to FIG. 3, first and second portions 20 and 22, respectively, have first and second circumferential steps 24 and 26, respectively, which define a circumferential slot 28 in which circumferential retainer 18 is engaged. Slot 28 is centred along a substantially central radial plane 30 of ball bearing 10.
Outer and inner races 12 and 14, respectively, have first and second rounded interior profiles 32 and 34, respectively. First and second rounded interior profiles 32 and 34, respectively, together define a rolling element raceway 36. Each of the plurality of rolling elements may be standard balls 16, also known as ball bearings, used in the ball bearing industry. An example of a suitable ba1116 may be a rockbit ball. In general each of the plurality of ball bearings 16 are provided as near-perfect spheres in order to reduce friction and wear within ball bearing 10. It should be noted that there are numerous shapes, other than balls 16, that the rolling elements may take. Referring to FIG. 1, plurality of ball bearings 16 are positioned between outer and inner races 12 and 14, respectively, as a full complement.
First and second rounded interior profiles 32 and 34, respectively, are rounded acircularly such that balls 16 contact rolling element raceway 36 at four contact points 38.
Contact points 38 are defined by two axis 46 and 48 perpendicular to one another that intersect each other at a center 49 of one of the plurality of ball bearings 16. Each of axis 46 and 48 are oriented substantially forty-five degrees from central radial plane 30. Contact points 38 are denoted at the points where axis 46 and 48 contact rolling element raceway 36.
Contact points 38 may be located at different positions along first and second rounded interior profiles 32 and 34, respectively, than shown.
Referring to FIG. 1, circumferential retainer 18 is provided as a ring that extends three-hundred-sixty degrees around an outside circumference 44 of first and second portions and 22, respectively. Referring to FIG. 3, retainer 18 has a first circumferential profile 50 that includes protrusions 52. Slot 28 has a second circumferential profile 54 that mates with first circumferential profile 50. It is preferable that first and second circumferential profles 50 20 and 54, respectively, mate in snap fit relation. Second circumferential profile 54 has recesses 56 in which protrusions 52 fit into and engage. In this manner, retainer 18 holds first and second portions 20 and 22, respectively, securely together. Alternatively, first circumferential profile 50 may have recesses 56 while second circumferential profile 54 may have protrusions 52. Furthermore, a circumferential shoulder (not shown) may extend from outer race 12, in place of slot 28, with retainer 18 fitting tightly around the circumferential shoulder in order to retain first and second portions 20 and 22 together.
Variations:
There will now be described a variation in which the inner race is split in two and the circumferential retainer extends around the inside circumference. Referring to FIG. 4, a unitized full complement four point angular contact ball bearing 110 is illustrated consisting of an outer race 112, an inner race 114, and a plurality of rolling elements.
Referring to FIG.
FIG. 1 is a side elevation view, partially in section, of a full complement four point angular contact ball bearing with the outer race split circumferentially into two portions.
FIG. 2 is a section view along the A-A section line of FIG. 1.
FIG. 3 is a more detailed side elevation view of the ball bearing of FIG. 2.
FIG. 4 is a side elevation view, partially in section, of a full complement four point angular contact ball bearing with the inner race split circumferentially into two portions.
FIG. 5 is a section view along the B-B section line of FIG. 4.
FIG. 6 is a more detailed side elevation view of the ball bearing of FIG. 5.
DETAILED DESCRIPTION
A unitized full complement four point angular contact ball bearing generally identified by reference numeral 10, will now be described with reference to FIG. 1 through FIG.6.
Structure and Relationship of Parts:
Referring to FIG. 1, a unitized full complement four point angular contact ball bearing 10 is illustrated consisting of an outer race 12, an inner race 14 and a plurality of rolling elements. Referring to FIG. 3, a circumferential retainer 18 prevents separation of outer race 12 and inner race 14. In the embodiment shown in FIG. 2, outer race 12 consists of a first portion 20 and a second portion 22. Referring to FIG. 3, first and second portions 20 and 22, respectively, have first and second circumferential steps 24 and 26, respectively, which define a circumferential slot 28 in which circumferential retainer 18 is engaged. Slot 28 is centred along a substantially central radial plane 30 of ball bearing 10.
Outer and inner races 12 and 14, respectively, have first and second rounded interior profiles 32 and 34, respectively. First and second rounded interior profiles 32 and 34, respectively, together define a rolling element raceway 36. Each of the plurality of rolling elements may be standard balls 16, also known as ball bearings, used in the ball bearing industry. An example of a suitable ba1116 may be a rockbit ball. In general each of the plurality of ball bearings 16 are provided as near-perfect spheres in order to reduce friction and wear within ball bearing 10. It should be noted that there are numerous shapes, other than balls 16, that the rolling elements may take. Referring to FIG. 1, plurality of ball bearings 16 are positioned between outer and inner races 12 and 14, respectively, as a full complement.
First and second rounded interior profiles 32 and 34, respectively, are rounded acircularly such that balls 16 contact rolling element raceway 36 at four contact points 38.
Contact points 38 are defined by two axis 46 and 48 perpendicular to one another that intersect each other at a center 49 of one of the plurality of ball bearings 16. Each of axis 46 and 48 are oriented substantially forty-five degrees from central radial plane 30. Contact points 38 are denoted at the points where axis 46 and 48 contact rolling element raceway 36.
Contact points 38 may be located at different positions along first and second rounded interior profiles 32 and 34, respectively, than shown.
Referring to FIG. 1, circumferential retainer 18 is provided as a ring that extends three-hundred-sixty degrees around an outside circumference 44 of first and second portions and 22, respectively. Referring to FIG. 3, retainer 18 has a first circumferential profile 50 that includes protrusions 52. Slot 28 has a second circumferential profile 54 that mates with first circumferential profile 50. It is preferable that first and second circumferential profles 50 20 and 54, respectively, mate in snap fit relation. Second circumferential profile 54 has recesses 56 in which protrusions 52 fit into and engage. In this manner, retainer 18 holds first and second portions 20 and 22, respectively, securely together. Alternatively, first circumferential profile 50 may have recesses 56 while second circumferential profile 54 may have protrusions 52. Furthermore, a circumferential shoulder (not shown) may extend from outer race 12, in place of slot 28, with retainer 18 fitting tightly around the circumferential shoulder in order to retain first and second portions 20 and 22 together.
Variations:
There will now be described a variation in which the inner race is split in two and the circumferential retainer extends around the inside circumference. Referring to FIG. 4, a unitized full complement four point angular contact ball bearing 110 is illustrated consisting of an outer race 112, an inner race 114, and a plurality of rolling elements.
Referring to FIG.
6, a circumferential retainer 118 secures outer race 112 and inner race 114 together. In the example shown in FIG. 5, inner race 114 consists of a first portion 120 and a second portion 122. Referring to FIG. 6, first and second portions 120 and 122, respectively, have first and second circumferential steps 124 and 126, respectively, that defme a circumferential slot 128 in which circumferential retainer 118 is engaged. Slot 128 is centred along a substantially central radial plane 130 of ball bearing 110. Outer and inner races 112 and 114, respectively, have first and second rounded interior profiles 132 and 134, respectively.
First and second rounded interior profiles 132 and 134, respectively, together define a rolling element raceway 136. Each of the plurality of rolling elements may be standard balls 116, also known as ball bearings, used in the ball bearing industry. An example of a suitable ball 116 may be a rockbit ball. In general each of the plurality of ball bearings 116 are provided as near-perfect spheres in order to reduce friction and wear within ball bearing 110. It should be noted that there are numerous shapes, other than balls 116, that the rolling elements may take.
Referring to FIG.
4, plurality of ball bearings 116 are positioned between outer and inner races 112 and 114, respectively, in a full complement.
First and second rounded interior profiles 132 and 134, respectively, are rounded acircularly such that balls 116 contact rolling element raceway 136 at four contact points 138.
Contact points 138 are defmed by two axis 146 and 148 perpendicular to one another that intersect each other at a center 149 of one of the plurality of ball bearings 116. Each of axis 146 and 148 are oriented substantially forty-five degrees from central radial plane 130.
Contact points 138 are denoted at the points where axis 146 and 148 contact rolling element raceway 136. Contact points 138 may be located at different positions along first and second rounded interior profiles 132 and 134, respectively, than shown.
Referring to FIG. 4, circumferential retainer 118 is provided as a ring that extends three-hundred-sixty degrees around an inside circumference 144 of first and second portions 120 and 122, respectively. Referring to FIG. 6, retainer 118 has a first circumferential profile 150 that includes protrusions 152. Slot 128 has a second circumferential profile 154 that mates with first circumferential profile 150. It is preferable that first and second circumferential profiles 150 and 154, respectively, mate in snap fit relation.
Second circumferential profile 154 has recesses 156 in which protrusions 152 fit into and engage. In this manner, retainer 118 holds first and second portions 120 and 122, respectively, securely together. Alternatively, first circumferential profile 150 may have recesses 156 while second circumferential profile 154 has protrusions 152. Furthermore, a circumferential shoulder (not shown) may extend from inner race 114, in place of slot 128, with retainer 118 fitting tightly 5 around the circumferential shoulder in order to retain first and second portions 120 and 122 together.
Advantages:
Bearings 10 and 110 enable a number of individual bearings to be handled during the installation and maintenance of a multi-high stacked assembly, without mixing up the races or having the balls falling out. The retaining ring of bearings 10 and 110, with positive circumferential snap engagement, solves both the axial retention and manufacturing issues. A
greater axial retention force is obtained from a 360 degree snap and, because no tooling is required, the design lends itself to low volume customization.
In this patent document, the word "comprising" is used in its non-limiting sense to mean that items following the word are included, but items not specifically mentioned are not excluded. A reference to an element by the indefinite article "a" does not exclude the possibility that more than one of the element is present, unless the context clearly requires that there be one and only one of the elements.
The following claims are to understood to include what is specifically illustrated and described above, what is conceptually equivalent, and what can be obviously substituted.
Those skilled in the art will appreciate that various adaptations and modifications of the described embodiments can be configured without departing from the scope of the claims.
The illustrated embodiments have been set forth only as examples and should not be taken as limiting the invention. It is to be understood that, within the scope of the following claims, the invention may be practiced other than as specifically illustrated and described.
First and second rounded interior profiles 132 and 134, respectively, together define a rolling element raceway 136. Each of the plurality of rolling elements may be standard balls 116, also known as ball bearings, used in the ball bearing industry. An example of a suitable ball 116 may be a rockbit ball. In general each of the plurality of ball bearings 116 are provided as near-perfect spheres in order to reduce friction and wear within ball bearing 110. It should be noted that there are numerous shapes, other than balls 116, that the rolling elements may take.
Referring to FIG.
4, plurality of ball bearings 116 are positioned between outer and inner races 112 and 114, respectively, in a full complement.
First and second rounded interior profiles 132 and 134, respectively, are rounded acircularly such that balls 116 contact rolling element raceway 136 at four contact points 138.
Contact points 138 are defmed by two axis 146 and 148 perpendicular to one another that intersect each other at a center 149 of one of the plurality of ball bearings 116. Each of axis 146 and 148 are oriented substantially forty-five degrees from central radial plane 130.
Contact points 138 are denoted at the points where axis 146 and 148 contact rolling element raceway 136. Contact points 138 may be located at different positions along first and second rounded interior profiles 132 and 134, respectively, than shown.
Referring to FIG. 4, circumferential retainer 118 is provided as a ring that extends three-hundred-sixty degrees around an inside circumference 144 of first and second portions 120 and 122, respectively. Referring to FIG. 6, retainer 118 has a first circumferential profile 150 that includes protrusions 152. Slot 128 has a second circumferential profile 154 that mates with first circumferential profile 150. It is preferable that first and second circumferential profiles 150 and 154, respectively, mate in snap fit relation.
Second circumferential profile 154 has recesses 156 in which protrusions 152 fit into and engage. In this manner, retainer 118 holds first and second portions 120 and 122, respectively, securely together. Alternatively, first circumferential profile 150 may have recesses 156 while second circumferential profile 154 has protrusions 152. Furthermore, a circumferential shoulder (not shown) may extend from inner race 114, in place of slot 128, with retainer 118 fitting tightly 5 around the circumferential shoulder in order to retain first and second portions 120 and 122 together.
Advantages:
Bearings 10 and 110 enable a number of individual bearings to be handled during the installation and maintenance of a multi-high stacked assembly, without mixing up the races or having the balls falling out. The retaining ring of bearings 10 and 110, with positive circumferential snap engagement, solves both the axial retention and manufacturing issues. A
greater axial retention force is obtained from a 360 degree snap and, because no tooling is required, the design lends itself to low volume customization.
In this patent document, the word "comprising" is used in its non-limiting sense to mean that items following the word are included, but items not specifically mentioned are not excluded. A reference to an element by the indefinite article "a" does not exclude the possibility that more than one of the element is present, unless the context clearly requires that there be one and only one of the elements.
The following claims are to understood to include what is specifically illustrated and described above, what is conceptually equivalent, and what can be obviously substituted.
Those skilled in the art will appreciate that various adaptations and modifications of the described embodiments can be configured without departing from the scope of the claims.
The illustrated embodiments have been set forth only as examples and should not be taken as limiting the invention. It is to be understood that, within the scope of the following claims, the invention may be practiced other than as specifically illustrated and described.
Claims (9)
1. Unitized full complement four point angular contact ball bearing, comprising:
an outer race;
an inner race;
a plurality of rolling elements positioned between the outer race and the inner race;
one of the outer race or the inner race comprising two portions, each of the two portions including means for engaging a circumferential retainer;
a circumferential retainer on one of an inside circumference or an outside circumference to retain the two portions.
an outer race;
an inner race;
a plurality of rolling elements positioned between the outer race and the inner race;
one of the outer race or the inner race comprising two portions, each of the two portions including means for engaging a circumferential retainer;
a circumferential retainer on one of an inside circumference or an outside circumference to retain the two portions.
2. The bearing of Claim 1, wherein the circumferential retainer is a ring that extends 360 degrees around the two portions.
3. The bearing of Claim 1, wherein each of the two portions has a circumferential step that serves as the means for engaging the circumferential retainer.
4. The bearing of Claim 3, wherein the circumferential retainer has a first circumferential profile and the circumferential step has a second circumferential profile that mates with the first circumferential profile.
5. The bearing of Claim 4, wherein the first circumferential profile is one of a protrusion or a recess and the second circumferential profile is an other of the protrusion or the recess.
6. The bearing of Claim 4, wherein the first circumferential profile and the second circumferential profile mate in snap fit relation.
7. The bearing of Claim 1, wherein the outer race comprises two portions.
8. The bearing of Claim 1, wherein the inner race comprises two portions.
9. The bearing of Claim 1, wherein the rolling elements are balls.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2608731 CA2608731A1 (en) | 2007-09-24 | 2007-09-24 | Unitized full complement 4-point angular contact ball bearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2608731 CA2608731A1 (en) | 2007-09-24 | 2007-09-24 | Unitized full complement 4-point angular contact ball bearing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2608731A1 true CA2608731A1 (en) | 2009-03-24 |
Family
ID=40475136
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2608731 Abandoned CA2608731A1 (en) | 2007-09-24 | 2007-09-24 | Unitized full complement 4-point angular contact ball bearing |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2608731A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105736580A (en) * | 2016-05-17 | 2016-07-06 | 安徽利达汽车轴承制造有限公司 | Double-outer-ring full ball bearing |
-
2007
- 2007-09-24 CA CA 2608731 patent/CA2608731A1/en not_active Abandoned
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105736580A (en) * | 2016-05-17 | 2016-07-06 | 安徽利达汽车轴承制造有限公司 | Double-outer-ring full ball bearing |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Dead |