CN112922963A - Separated bearing retainer and cylindrical roller bearing - Google Patents
Separated bearing retainer and cylindrical roller bearing Download PDFInfo
- Publication number
- CN112922963A CN112922963A CN202110272248.3A CN202110272248A CN112922963A CN 112922963 A CN112922963 A CN 112922963A CN 202110272248 A CN202110272248 A CN 202110272248A CN 112922963 A CN112922963 A CN 112922963A
- Authority
- CN
- China
- Prior art keywords
- retainer
- rolling body
- base
- rolling
- axial limiting
- 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.)
- Pending
Links
- 238000005096 rolling process Methods 0.000 claims abstract description 89
- 238000006073 displacement reaction Methods 0.000 claims abstract description 19
- 238000000926 separation method Methods 0.000 claims description 59
- 239000003638 chemical reducing agent Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 125000006850 spacer group Chemical group 0.000 description 2
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Images
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
- F16C33/46—Cages for rollers or needles
- F16C33/4617—Massive or moulded cages having cage pockets surrounding the rollers, e.g. machined window cages
- F16C33/4641—Massive or moulded cages having cage pockets surrounding the rollers, e.g. machined window cages comprising two annular parts joined together
Abstract
The invention relates to a separated bearing retainer and a cylindrical roller bearing. The split type retainer comprises a first retainer and a second retainer, wherein the first retainer and the second retainer are oppositely matched. Through the structure of two retainers, the two retainers are mutually matched to separate adjacent rolling bodies and limit the axial displacement of the rolling bodies, under the condition of ensuring the functions, sequential assembly from axial two sides can be realized, and the assembly difficulty is greatly reduced.
Description
Technical Field
The invention relates to the technical field of bearing parts, in particular to a separated bearing retainer and a cylindrical roller bearing.
Background
Crank shafts are important structures of cycloidal pin gear speed reducers, limited by structural dimensions and working loads, and are often matched with cycloidal gears through cylindrical roller bearings without traditional bearing inner rings and traditional bearing outer rings. Since such a reduction gear has a high requirement on the accuracy of the eccentricity of the crankshaft, the radial clearance of the bearings must be small.
The traditional cylindrical roller bearing adopts an integral retainer, the whole bearing can only be assembled together from the axial direction, and the assembly is very difficult because the radial clearance among a crank shaft, the bearing and a cycloid gear is very small.
Disclosure of Invention
Therefore, the technical problem to be solved by the invention is to overcome the problem of difficult assembly of the integral retainer in the prior art, and provide a separate bearing retainer capable of being assembled at two axial sides.
In order to solve the technical problem, the invention provides a separated bearing retainer, which comprises a first retainer and a second retainer, wherein the first retainer and the second retainer are arranged oppositely;
the first retainer comprises a first base structure and a first rolling body separation structure connected with the first base structure, the first rolling body separation structure is positioned on the matching surface of the first base structure, and the first rolling body separation structure separates two adjacent rolling bodies;
the second retainer comprises a second base body structure and a second rolling body separation structure connected with the second base body structure, the second base body structure and the first base body structure are matched to limit the axial displacement of the rolling body, the second rolling body separation structure is located on the matching surface of the second base body structure, and the second rolling body separation structure and the first rolling body separation structure are arranged in a right-to-right mode.
In one embodiment of the invention, the outer wall of the first base structure and/or the outer wall of the second base structure is/are form-fitted to the inner wall of the bearing outer ring.
In one embodiment of the invention, the outer wall of the first base structure and/or the outer wall of the second base structure is clearance fitted with the inner wall of the bearing outer ring.
In one embodiment of the invention, the separation end of the first rolling element separation structure and the separation end of the second rolling element separation structure are both adapted to the shape of the rolling elements.
In one embodiment of the invention, the separation end of the first rolling element separation structure and the separation end of the second rolling element separation structure are in clearance fit with the rolling elements.
In one embodiment of the invention, the first cage and/or the second cage further comprises a yield gap.
In one embodiment of the present invention, a sum of thicknesses of the first cage and the second cage is equal to or less than a thickness of a bearing outer ring.
In one embodiment of the present invention, a first positioning element is disposed on the first rolling element separation structure, a second positioning element is disposed on the second rolling element separation structure, and the first positioning element and the second positioning element are adapted to each other.
In one embodiment of the invention, at least one of the first cage and the second cage further comprises an axial limiting structure;
when the first holder comprises the axial limiting structure, the axial limiting structure is positioned on a non-matching surface of the first base structure, and the axial limiting structure limits the axial displacement of the first holder;
when the second retainer comprises the axial limiting structure, the axial limiting structure is positioned on a non-matching surface of the second base structure, and the axial limiting structure limits the axial displacement of the second retainer;
when the first retainer and the second retainer both comprise the axial limiting structures, the axial limiting structures are located on the non-matching surfaces of the first base structure and the second base structure, and the axial limiting structures limit axial displacement of the first retainer and the second retainer.
The invention also provides a cylindrical roller bearing which comprises the separated retainer, an outer ring, an inner ring and rolling bodies, wherein the rolling bodies and the separated retainer are positioned between the outer ring and the inner ring, the separated retainer separates two adjacent rolling bodies, and the separated retainer limits the axial displacement of the rolling bodies. The cylindrical roller bearing provided by the invention is suitable for a cycloidal pin gear speed reducer.
Compared with the prior art, the technical scheme of the invention has the following advantages:
according to the separated bearing retainer, due to the structure of the two half retainers, the two half retainers are matched with each other to separate the adjacent rolling bodies and limit the axial displacement of the rolling bodies, so that sequential assembly from two axial sides can be realized under the condition that the functions are ensured, and the assembly difficulty is greatly reduced.
Drawings
In order that the present disclosure may be more readily and clearly understood, reference is now made to the following detailed description of the embodiments of the present disclosure taken in conjunction with the accompanying drawings, in which
Fig. 1 is a schematic structural view of a first embodiment of a split cage according to the present invention.
Fig. 2 is a schematic structural view of a second embodiment of the split cage of the present invention.
Fig. 3 is a schematic structural view of a third embodiment of the split cage of the present invention.
Fig. 4 is a schematic structural view of a fourth embodiment of the split cage of the present invention.
Fig. 5 is a schematic view of a one-sided structure of the split cage engaged with the rolling elements shown in fig. 4.
Fig. 6 is a schematic view showing a structure in which the split cage shown in fig. 4 is engaged with the rolling elements.
Fig. 7 is a schematic structural view of the cylindrical roller bearing of the present invention.
Fig. 8 is a schematic sectional view of the cylindrical roller bearing of the present invention.
Fig. 9 is a schematic view of the internal structure of the cylindrical roller bearing of the present invention.
The specification reference numbers indicate: 1. a first holder; 11. a first base structure; 12. a first rolling element separation structure; 13. positioning holes; 2. a second holder; 21. a second base structure; 22. a second rolling element separation structure; 23. positioning pins; 3. a abdication gap; 4. an axial limiting structure; 5. an outer ring; 6. an inner ring; 7. and a rolling body.
Detailed Description
The present invention is further described below in conjunction with the following figures and specific examples so that those skilled in the art may better understand the present invention and practice it, but the examples are not intended to limit the present invention.
Referring to fig. 1, the separated bearing retainer of the present invention includes a first retainer 1 and a second retainer 2, where the first retainer 1 and the second retainer 2 are oppositely disposed in a matching manner, that is, the first and second retainers are used in a matching manner.
The first cage 1 includes a first base structure 11 and a first rolling element separation structure 12 connected to the first base structure 11, where the first base structure 11 is a flat structure and is capable of moving axially between an outer ring and an inner ring of a bearing, that is, a cross section of the first base structure 11 is located within a coverage area of a gap between the outer ring and the inner ring of the bearing.
The first base structure 11 comprises a matching surface and a non-matching surface, the first rolling element separation structure 12 is located on the matching surface of the first base structure 11, and since the rolling elements usually comprise a plurality of rolling elements, in this embodiment, the first rolling element separation structure 12 comprises a plurality of rolling elements and is distributed along the circumference of the first base structure 11, and the first rolling element separation structure 12 is used for separating two adjacent rolling elements; in the present embodiment, the first rolling element separation structure 12 includes a separation end and a non-separation end, and the separation end is in contact with the rolling elements, because in the present embodiment, a plurality of the first rolling element separation structures 12 are circumferentially distributed, each of the first rolling element separation structures 12 includes two separation ends, that is, each rolling element is located between the separation ends of two adjacent first rolling element separation structures 12; due to the large size of the rolling bodies, the separating ends of two adjacent first rolling body separating structures 12 are not enough to completely wrap the rolling bodies, so in the embodiment, the separating ends of the first rolling body separating structures 12 are matched with the shapes of the rolling bodies so as to better separate two adjacent rolling bodies; in order to further improve the separation effect, in the present embodiment, a clearance fit is adopted between the separation end of the first rolling element separation structure 12 and the rolling element; the first rolling element separation structure 12 has a thickness, i.e. a predetermined distance in the axial direction with respect to the first base structure 11.
The second cage 2 includes a second base structure 21 and a second rolling element separation structure 22 connected to the second base structure 21, and the second cage 2 is substantially similar in structure to the first cage 1. The matching surfaces of the two cages are arranged oppositely, and the second rolling element separation structures 22 and the first rolling element separation structures 12 are in one-to-one correspondence and are arranged oppositely (that is, the second rolling element separation structures 22 also comprise a plurality of structures).
In this embodiment, under the condition that the rolling bodies are separated, in order to make the retainer have better stress bearing capacity, the outer walls of the first base structure 11 and the second base structure 21 are matched with the inner wall of the bearing outer ring in shape, that is, are annular; in order to further improve the mechanical property, in this embodiment, the first base structure 11 and the second base structure 21 are in clearance fit with the inner wall of the bearing outer ring.
In the present embodiment, the sum of the thicknesses of the first cage 1 and the second cage 2 is equal to or less than the thickness of the bearing outer ring. Thereby limiting the axial displacement of the rolling elements.
Example two
In this embodiment, in order to ensure that the relative position between the first and second retainers 1 and 2 is accurate, at least one of the first rolling element separation structures 12 is provided with a positioning hole 13, and at least one of the second rolling element separation structures 22 is provided with a positioning pin 23, so that the relative position between the first and second retainers 1 and 2 is ensured to be fixed through the cooperation of the positioning hole 13 and the positioning pin 23.
EXAMPLE III
Because this product is based on cylindrical roller bearing, current holder when installation, will generally be in advance with grease synchronous put in to reduce frictional force, however, this kind of setting mode, when the lubricated preparation of needs interpolation again, need pull down the holder again, it is not convenient enough, in this embodiment, improves it, provides a holder that possesses the clearance of stepping down.
The first retainer 1 and the second retainer 2 are provided with a relief gap 3.
Preferably, the first base structure 11 and/or the second base structure 21 are provided with at least one clearance 3.
Further preferably, a relief gap is provided at least one of the first rolling element separation structures 12 and/or at least one of the second rolling element separation structures 22. To ensure that the additive oil can be added to the deepest part.
Furthermore, a relief gap is provided at each first rolling element separation structure 12 and/or each second rolling element separation structure 22. So as to meet the requirement of accurate positioning of adding lubricating oil.
Example four
Since the outer diameter of the cage is equal to or smaller than the inner diameter of the outer ring, the cage also undergoes a certain axial displacement in order to restrict the axial displacement of the cage. The cage is further improved in this embodiment.
In this embodiment, each of the first holder 1 and the second holder 2 further includes an axial limiting structure 4, the axial limiting structure 4 is connected to the first base structure 11 and the second base structure 21 and is located on a non-matching surface of the first base structure 11 and the second base structure 21, and the axial limiting structure 4 limits axial displacement of the first holder 1 and the second holder 2.
In this embodiment, the outer diameter of the axial limiting structure 4 is larger than the inner diameter of the outer ring.
In this embodiment, the cross section of the axial limiting structure 4 is also annular, and is used in cooperation with the shaft end outer ring spacer, so as to further limit the axial displacement of the retainer. In this embodiment, the first holder 1 and the second holder 2 do not need to be provided with the axial direction restricting structure 4, that is, one or both of the first holder 1 and the second holder 2 may be provided with the axial direction restricting structure 4, and the axial direction displacement of the first holder 1 and the second holder 2 is restricted by the shaft end outer ring spacer.
Based on the above technical solution, in this embodiment, a cylindrical roller bearing is provided, which includes the above-mentioned split type cage, and further includes an outer ring 5, an inner ring 6 and a rolling element 7, the rolling element 7 and the split type cage are located between the outer ring 5 and the inner ring 6, the split type cage is spaced by two adjacent rolling elements, and limits axial displacement of the rolling element 7, in this embodiment, the inner ring 6 is an eccentric structure, the outer ring 5 includes meshing teeth (not shown in the drawings), and the meshing teeth are circumferentially distributed on an outer wall of the outer ring 5 to match other components.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications of the invention may be made without departing from the spirit or scope of the invention.
Claims (10)
1. A disconnect-type bearing retainer which characterized in that: the device comprises a first retainer and a second retainer, wherein the first retainer and the second retainer are arranged oppositely;
the first retainer comprises a first base structure and a first rolling body separation structure connected with the first base structure, the first rolling body separation structure is positioned on the matching surface of the first base structure, and the first rolling body separation structure separates two adjacent rolling bodies;
the second retainer comprises a second base body structure and a second rolling body separation structure connected with the second base body structure, the second base body structure and the first base body structure are matched to limit the axial displacement of the rolling body, the second rolling body separation structure is located on the matching surface of the second base body structure, and the second rolling body separation structure and the first rolling body separation structure are arranged in a right-to-right mode.
2. A split bearing cage according to claim 1, wherein: the outer wall of the first base structure and/or the outer wall of the second base structure are matched with the shape of the inner wall of the bearing outer ring.
3. A split bearing cage according to claim 2, wherein: and the outer wall of the first base structure and/or the outer wall of the second base structure are in clearance fit with the inner wall of the bearing outer ring.
4. A split bearing cage according to claim 1, wherein: and the separating end of the first rolling body separating structure and the separating end of the second rolling body separating structure are matched with the shapes of the rolling bodies.
5. The split bearing cage of claim 4, wherein: and the separation end of the first rolling body separation structure and the separation end of the second rolling body separation structure are in clearance fit with the rolling bodies.
6. A split bearing cage according to claim 1, wherein: the first cage and/or the second cage further comprise a yield gap.
7. A split bearing cage according to claim 1, wherein: the sum of the thicknesses of the first retainer and the second retainer is less than or equal to the thickness of the bearing outer ring.
8. A split bearing cage according to claim 1, wherein: the first rolling body separation structure is provided with a first positioning piece, the second rolling body separation structure is provided with a second positioning piece, and the first positioning piece and the second positioning piece are matched with each other.
9. A split bearing cage according to any of claims 1 to 8, wherein: at least one of the first retainer and the second retainer further comprises an axial limiting structure;
when the first holder comprises the axial limiting structure, the axial limiting structure is positioned on a non-matching surface of the first base structure, and the axial limiting structure limits the axial displacement of the first holder;
when the second retainer comprises the axial limiting structure, the axial limiting structure is positioned on a non-matching surface of the second base structure, and the axial limiting structure limits the axial displacement of the second retainer;
when the first retainer and the second retainer both comprise the axial limiting structures, the axial limiting structures are located on the non-matching surfaces of the first base structure and the second base structure, and the axial limiting structures limit axial displacement of the first retainer and the second retainer.
10. A cylindrical roller bearing characterized in that: comprising a split cage according to any of the preceding claims 1-9;
the rolling body and the separated type retainer are positioned between the outer ring and the inner ring, the separated type retainer is adjacent to the rolling body at intervals, and the separated type retainer limits the axial displacement of the rolling body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110272248.3A CN112922963A (en) | 2021-03-12 | 2021-03-12 | Separated bearing retainer and cylindrical roller bearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110272248.3A CN112922963A (en) | 2021-03-12 | 2021-03-12 | Separated bearing retainer and cylindrical roller bearing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112922963A true CN112922963A (en) | 2021-06-08 |
Family
ID=76172976
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110272248.3A Pending CN112922963A (en) | 2021-03-12 | 2021-03-12 | Separated bearing retainer and cylindrical roller bearing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112922963A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE851942A (en) * | 1976-03-19 | 1977-09-01 | Caterpillar Tractor Co | CAGE FOR AN ARMY |
| JPH0236623U (en) * | 1982-12-16 | 1990-03-09 | ||
| CN101918725A (en) * | 2007-10-03 | 2010-12-15 | 美国光洋轴承有限责任公司 | Positioning means for camshaft roller bearing |
| CN102239340A (en) * | 2008-12-06 | 2011-11-09 | 谢夫勒科技有限两合公司 | Radial roller bearing, in particular single track ball roller bearing |
| DE102014201718A1 (en) * | 2014-01-31 | 2015-08-06 | Schaeffler Technologies AG & Co. KG | Rolling bearing cage and method for producing a roller bearing cage |
| CN209414415U (en) * | 2018-12-27 | 2019-09-20 | 无锡市锡珠塑料有限公司 | A kind of needle bearing plastic cage facilitating installation |
| CN110307255A (en) * | 2018-03-27 | 2019-10-08 | 株式会社捷太格特 | Roller cage formula bearing |
-
2021
- 2021-03-12 CN CN202110272248.3A patent/CN112922963A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE851942A (en) * | 1976-03-19 | 1977-09-01 | Caterpillar Tractor Co | CAGE FOR AN ARMY |
| JPH0236623U (en) * | 1982-12-16 | 1990-03-09 | ||
| CN101918725A (en) * | 2007-10-03 | 2010-12-15 | 美国光洋轴承有限责任公司 | Positioning means for camshaft roller bearing |
| CN102239340A (en) * | 2008-12-06 | 2011-11-09 | 谢夫勒科技有限两合公司 | Radial roller bearing, in particular single track ball roller bearing |
| DE102014201718A1 (en) * | 2014-01-31 | 2015-08-06 | Schaeffler Technologies AG & Co. KG | Rolling bearing cage and method for producing a roller bearing cage |
| CN110307255A (en) * | 2018-03-27 | 2019-10-08 | 株式会社捷太格特 | Roller cage formula bearing |
| CN209414415U (en) * | 2018-12-27 | 2019-09-20 | 无锡市锡珠塑料有限公司 | A kind of needle bearing plastic cage facilitating installation |
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