CN113294433B - Thrust bearing group for screw drilling tool and grinding method thereof - Google Patents
Thrust bearing group for screw drilling tool and grinding method thereof Download PDFInfo
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- CN113294433B CN113294433B CN202110492074.1A CN202110492074A CN113294433B CN 113294433 B CN113294433 B CN 113294433B CN 202110492074 A CN202110492074 A CN 202110492074A CN 113294433 B CN113294433 B CN 113294433B
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Classifications
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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
- 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
- F16C19/10—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for axial load mainly
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B5/00—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor
- B24B5/36—Single-purpose machines or devices
-
- 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
- F16C19/54—Systems consisting of a plurality of bearings with rolling friction
-
- 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
-
- 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
- F16C33/585—Details of specific parts of races of raceways, e.g. ribs to guide the rollers
-
- 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
- F16C33/64—Special methods of manufacture
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Rolling Contact Bearings (AREA)
Abstract
The utility model relates to a thrust bearing group for a screw drilling tool and a polishing method thereof. The method for polishing the thrust bearing group for the screw drilling tool polishes the contact surfaces of the inner and outer rings of one of any two adjacent rows of bearings so that the heights of the inner and outer rings of the row of bearings are the same, wherein after the bearings are assembled, the contact surfaces of all polished inner and outer rings face the same direction. By the aid of the polishing method, the inner ring, the outer ring and the like of the bearings in the same row are subjected to high treatment, and the final axial clearance of the bearings in each row is the same, so that the axial stress of the bearings in each row is more uniform, the service life of the thrust bearing group is greatly prolonged, the polishing efficiency of the bearings in each row is improved, and the labor capacity is reduced.
Description
Technical Field
The utility model relates to a thrust bearing group for a screw drilling tool and a polishing method thereof.
Background
The thrust bearing group for the screw drilling tool is usually formed by serially connecting multiple four-point contact ball bearings, and the axial two sides of other ferrules except the bearing ferrules at the upper end and the lower end are respectively provided with a rollaway nest, such as a sealing thrust bearing for a transmission shaft of the screw drilling tool disclosed in Chinese patent publication No. CN 203548582U.
The thrust bearing group for the screw drilling tool comprises multiple thrust bearings, and the heights of the inner ring and the outer ring of each thrust bearing are inconsistent due to the existence of machining errors, so that each thrust bearing participating in the assembly often causes premature failure of the thrust bearing group due to overlarge stress gap in the use process of the thrust bearing group for the screw drilling tool.
Disclosure of Invention
The utility model aims to provide a grinding method of a thrust bearing group for a screw drilling tool, which aims to solve the technical problem that in the prior art, the heights of the inner ring and the outer ring of each combined thrust bearing are inconsistent due to the existence of machining errors, so that each thrust bearing participating in assembly often causes premature failure of the thrust bearing group due to overlarge stress gap; the utility model also aims to provide a thrust bearing set for the screw drilling tool.
In order to achieve the above purpose, the technical scheme of the polishing method of the thrust bearing set for the screw drilling tool is as follows:
the method for polishing the thrust bearing group for the screw drilling tool polishes the contact surfaces of the inner and outer rings of one of any two adjacent rows of bearings so that the heights of the inner and outer rings of the row of bearings are the same, wherein after the bearings are assembled, the contact surfaces of all polished inner and outer rings face the same direction.
The beneficial effects are that: by the aid of the polishing method, the inner ring, the outer ring and the like of the bearings in the same row are subjected to high treatment, so that axial stress of the bearings in each row is more uniform, service life of the thrust bearing group is greatly prolonged, polishing efficiency of the bearings in each row is improved, and labor capacity is reduced.
Further, the height to be achieved after the inner and outer rings of the single row bearing are polished is calculated by the following formula:
wherein H is w The height of the outer ferrule; h n The height of the inner ring; g s Is the actual axial play; g m Is the target axial play.
The beneficial effects are that: through the formula, the inner ring, the outer ring and the like of the bearings in the same row are subjected to equal height treatment, the final axial clearance of the bearings in each row is the same, and the stress uniformity of the bearings in each row is further improved.
Further, the inner and outer ring contact surfaces of one of any two adjacent rows of bearings are polished simultaneously.
The beneficial effects are that: and the inner ring and the outer ring of the same row of bearings are polished simultaneously through the polishing device, so that polishing efficiency is improved.
In order to achieve the above purpose, the thrust bearing group for the screw drilling tool of the utility model has the technical scheme that:
thrust bearing group for screw drilling tool includes:
the bearing is assembled in series and provided with a plurality of rows;
the axial direction of the bearing is taken as the up-down direction, and the heights of the inner ring and the outer ring of each row of bearings from the first row of bearings from the upper row to the second row of bearings from the lower row are the same; or the heights of the inner ring and the outer ring of each row of bearings from the second row of bearings from the first row of bearings are the same.
The beneficial effects are that: by the design, the axial stress of each row of bearings is more uniform, and the service life of the thrust bearing group is greatly prolonged.
Further, the axial play between any two adjacent rows of bearings is the same.
The beneficial effects are that: the stress uniformity of each row of bearings is further improved.
Drawings
FIG. 1 is a schematic view of a thrust bearing set for a screw drilling tool according to the present utility model;
FIG. 2 is a schematic view of the first row of bearings and the second row of bearings in FIG. 1;
FIG. 3 is a schematic view of the second row of bearings and the third row of bearings in FIG. 1;
FIG. 4 is a schematic view of the third row of bearings and the fourth row of bearings in FIG. 1;
FIG. 5 is a schematic view of the second row of bearings of FIG. 2 prior to grinding;
in the figure: 11. a first outer row of ferrules; 12. a first column of inner ferrules; 13. a second outer collar; 14. a second row of inner ferrules; 15. a third row of outer ferrules; 16. a third row of inner ferrules; 17. a fourth row of outer ferrules; 18. a fourth column of inner ferrules; 19. rolling bodies.
Detailed Description
The present utility model will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the particular embodiments described herein are illustrative only and are not intended to limit the utility model, i.e., the embodiments described are merely some, but not all, of the embodiments of the utility model. The components of the embodiments of the present utility model generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the utility model, as presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be made by a person skilled in the art without making any inventive effort, are intended to be within the scope of the present utility model.
It is noted that relational terms such as "first" and "second", and the like, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element. Furthermore, the terms "upper" and "lower" are based on the orientation and positional relationship shown in the drawings, and are merely for convenience of description of the utility model, and do not denote that the device or component in question must have a particular orientation, and thus should not be construed as limiting the utility model.
The features and capabilities of the present utility model are described in further detail below in connection with the examples.
Example 1 of thrust bearing set for screw drilling tool of the present utility model:
as shown in fig. 1, the thrust bearing group for the screw drilling tool comprises four rows of bearings which are assembled in series, wherein two adjacent rows of bearings share one circle of rolling bodies 19, namely three circles of rolling bodies 19 are arranged in total; in this embodiment, the axial direction of the bearing is taken as the up-down direction, the lowest bearing is taken as the first row of bearings, and the uppermost bearing is taken as the fourth row of bearings. The rolling elements 19 are balls, that is, the ball bearings are the rows of bearings. In other embodiments, the number of tandem set bearings of the thrust bearing set for the progressive cavity drilling tool may be set as desired.
In this embodiment, the heights of the inner ring and the outer ring of each of the first to third rows of bearings are the same, and the axial play between any two adjacent rows of bearings is the same, where the axial play is a positive play. By the design, the axial stress of each row of bearings is more uniform, and the service life of the thrust bearing group is greatly prolonged. It should be noted that the contact surfaces of the upper sides of the collars of the first to third rows of bearings are grinding surfaces, and the lower sides of the collars of the first to third rows of bearings are used as reference surfaces during grinding, wherein grinding is not required for the fourth row of bearings.
Example 2 of thrust bearing set for screw drilling tool of the present utility model:
the thrust bearing set for a screw drill in this embodiment is different from embodiment 1 in that in embodiment 1, the lowermost bearing is used as the first row of bearings, the uppermost bearing is used as the fourth row of bearings, and the contact surfaces between the first row of bearings and the upper side of the collar of the third row of bearings are polished surfaces, wherein the fourth row of bearings do not need polishing. In this embodiment, based on the case that the lowermost bearing is the first row bearing and the uppermost bearing is the fourth row bearing, the contact surfaces from the second row bearing to the lower side of the ring of the fourth row bearing are polished surfaces, wherein the first row bearing does not need to be polished.
Example 1 of the method for grinding a thrust bearing set for a screw drill according to the present utility model:
as shown in fig. 2, the actual axial play G of a four-point contact ball bearing consisting of a first row outer race 11, a first row inner race 12, a second row outer race 13, a second row inner race 14, and rolling bodies 19 between the first row and second row bearings is measured s1 Height H of the first row of outer ferrules 11 w1 Height H of the first column of inner ferrules 12 n1 The method comprises the steps of carrying out a first treatment on the surface of the Wherein G is m Is the target axial play.
The final height after grinding of the first row outer ring 11 and the first row inner ring 12 of the first row bearing is determined as follows:
the polished heights of the first-row outer ferrules 11 and the first-row inner ferrules 12 are the same, and the contact surfaces of the upper sides of the first-row outer ferrules 11 and the first-row inner ferrules 12 are polished surfaces.
As shown in fig. 3, the actual axial play G of a four-point contact ball bearing consisting of the second row outer race 13, the second row inner race 14, the third row outer race 15, the third row inner race 16, and the rolling elements 19 between the second row bearing and the third row bearing is measured s2 Height H of the second row of outer ferrules 13 w2 Height H of the second column of inner ferrules 14 n2 The method comprises the steps of carrying out a first treatment on the surface of the Wherein G is m Is the target axial play.
The final height after grinding of the second row outer ring 13 and the second row inner ring 14 of the second row bearing is determined as follows:
the polished heights of the second-row outer ferrules 13 and the second-row inner ferrules 14 are the same, and the contact surfaces of the upper sides of the second-row outer ferrules 13 and the second-row inner ferrules 14 are polished surfaces.
As shown in fig. 4, the third row outer race 15, the third row inner race 16, the fourth row outer race 17, and the fourth row inner race 18 are measured toAnd the actual axial play G of a four-point contact ball bearing consisting of rolling bodies 19 between the third row of bearings and the fourth row of bearings s3 Height H of third column outer race 15 w3 Height H of the third column of inner ferrules 16 n3 The method comprises the steps of carrying out a first treatment on the surface of the Wherein G is m Is the target axial play.
The final height after grinding of the third row outer ring 15 and the third row inner ring 16 of the third row bearing is determined as follows:
the polished heights of the third-row outer ferrules 15 and the third-row inner ferrules 16 are the same, and the contact surfaces of the upper sides of the third-row outer ferrules 15 and the third-row inner ferrules 16 are polished surfaces.
In this embodiment, the first row of bearings, the second row of bearings, and the third row of bearings after the bearing assembly have the same orientation of the grinding surfaces, and are all disposed upward.
In this embodiment, when the same row of bearings is polished, the inner ring and the outer ring of the same row of bearings are polished simultaneously by the polishing device, so as to improve polishing efficiency and ensure that the heights of the polished inner ring and outer ring are the same.
By the aid of the grinding method, the inner ring and the outer ring of the same row of bearings are subjected to equal-height treatment, and meanwhile, the target axial clearance G of each row of bearings is achieved m The axial stress of each row of bearings is more uniform, the service life of the thrust bearing group is greatly prolonged, the grinding efficiency of each row of bearings is improved, and the labor capacity is reduced.
In this embodiment, the change rule of the axial play of the four-point contact ball bearing is: the axial play is correspondingly reduced by 1 μm for each grinding of the end face of the inner or outer ferrule, respectively, and by 2 μm if the inner and outer ferrules are simultaneously ground by 1 μm.
As shown in fig. 5, taking the second row of bearings as an example, the target axial play G m ＝G s2 -|H w2 -H n2 -2X, where H w2 -H n2 I is the inner and the outer jacketsThe difference in height of the ring, which affects the axial play, is 1:1, wherein X is the grinding amount of the inner ferrule and the outer ferrule at the same time, and the influence of the grinding amount on the axial clearance is 1: 2.
During grinding, the height difference |H of the inner and outer ferrules is firstly calculated w2 -H n2 I repair and wear away, and the axial play is reduced by I H w2 -H n2 I (I); and grinding the inner ferrule and the outer ferrule simultaneously, and if X is ground off, reducing the axial clearance by 2X.
Therefore G m ＝G s2 -|H w2 -H n2 -2X. The coping amount is:
the final height of the polished ferrule is:
example 2 of the method for grinding a thrust bearing set for a screw drill of the present utility model:
the method of grinding the thrust bearing set for a screw drill according to this embodiment differs from embodiment 1 in that in embodiment 1, the contact surface on the upper side of the ring of the lower bearing in any two adjacent rows of bearings is ground so that the heights of the inner ring and the outer ring of the row of bearings are the same. In this embodiment, the contact surface of the lower side of the ring of the upper row bearing in any two adjacent rows of bearings is polished, so that the heights of the inner ring and the outer ring of the row bearing are the same.
Example 3 of the method for grinding a thrust bearing set for a screw drill of the present utility model:
the method for grinding the thrust bearing set for a screw drill according to this embodiment differs from embodiment 1 in that in embodiment 1, the contact surfaces on the upper sides of the inner and outer races of the lower bearings in any two adjacent rows of bearings are ground simultaneously so that the heights of the inner and outer races of the rows of bearings are the same. In this embodiment, the contact surfaces on the upper sides of the inner and outer races of the lower bearing in any two adjacent rows of bearings are polished respectively so that the heights of the inner and outer races of the rows of bearings are the same.
The above description is only a preferred embodiment of the present utility model, and the patent protection scope of the present utility model is defined by the claims, and all equivalent structural changes made by the specification and the drawings of the present utility model should be included in the protection scope of the present utility model.
Claims (3)
1. The polishing method of the thrust bearing group for the screw drilling tool is characterized in that the contact surfaces of the inner and outer ferrules of one of any two adjacent rows of bearings are polished, so that the heights of the inner and outer ferrules of the row of bearings are the same, wherein after the bearings are assembled, the contact surfaces of all polished inner and outer ferrules face the same; the height to be reached after the inner and outer rings of the single-row bearing are polished is calculated by the following formula:；
wherein H is w The height of the outer ferrule; h n The height of the inner ring; g s Is the actual axial play; g m Is the target axial play.
2. The method of grinding a thrust bearing set for a screw drill according to claim 1, wherein the inner and outer race contact surfaces of one of any two adjacent rows of bearings are ground simultaneously.
3. Thrust bearing group for screw drilling tool, its characterized in that includes:
the bearing is assembled in series and provided with a plurality of rows;
an inner ring and an outer ring of each row of bearings from the first row of bearings from the upper row to the second row of bearings from the lower row of bearings with the axial direction of the bearings as the up-down direction; or the inner ring and the outer ring of each row of bearings from the second row of bearings to the first row of bearings from the last row of bearings are polished the contact surfaces of the outer rings have the same height, and the axial clearance between any two adjacent rows of bearings is the same; and the grinding surfaces of the bearings in each row after being assembled face the same.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110492074.1A CN113294433B (en) | 2021-05-06 | 2021-05-06 | Thrust bearing group for screw drilling tool and grinding method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110492074.1A CN113294433B (en) | 2021-05-06 | 2021-05-06 | Thrust bearing group for screw drilling tool and grinding method thereof |
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| Publication Number | Publication Date |
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| CN113294433A CN113294433A (en) | 2021-08-24 |
| CN113294433B true CN113294433B (en) | 2023-08-11 |
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Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3978566A (en) * | 1974-02-20 | 1976-09-07 | Federal-Mogul Corporation | Process for making sectionalized precision components |
| CN2201513Y (en) * | 1994-06-21 | 1995-06-21 | 青岛轴承厂 | Four-point contact thrust ball bearing |
| CN2718314Y (en) * | 2004-06-23 | 2005-08-17 | 洛阳轴研科技股份有限公司 | Four point contact series type thrust ball bearing |
| CN1696525A (en) * | 2004-05-15 | 2005-11-16 | 洛阳轴承集团有限公司 | Manufacturing method of group-assorted bulge quantity of angular contacted ball bearing |
| CN201053861Y (en) * | 2007-06-25 | 2008-04-30 | 宝山钢铁股份有限公司 | Double row conical rolling bearing clearance valve device |
| CN201162768Y (en) * | 2008-02-01 | 2008-12-10 | 西南石油大学 | Long life screw drill transmission shaft bearing with cylindrical roller |
| CN201461734U (en) * | 2009-04-28 | 2010-05-12 | 河南省宇华轴承有限公司 | Multi-row tapered roller thrust bearing and steel ball combined bearing for petroleum oil screw stem drilling tool |
| CN101957163A (en) * | 2010-08-11 | 2011-01-26 | 洛阳轴研科技股份有限公司 | Method for measuring axial clearance and preloading chearance of face-to-face angular contact ball bearing |
| JP2013228034A (en) * | 2012-04-25 | 2013-11-07 | Nsk Ltd | Multiple row combination ball bearing |
| CN105782237A (en) * | 2016-05-17 | 2016-07-20 | 中山市盈科轴承制造有限公司 | Bi-inner-ring and double-row angular contact thrust ball bearing and preloading interval optimization method thereof |
| CH711020A2 (en) * | 2015-04-21 | 2016-10-31 | Jesa Sa | Ball bearings and method for assembling such a ball bearing. |
| JP2020133688A (en) * | 2019-02-14 | 2020-08-31 | 日本精工株式会社 | Multi-row ball bearing |
-
2021
- 2021-05-06 CN CN202110492074.1A patent/CN113294433B/en active Active
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3978566A (en) * | 1974-02-20 | 1976-09-07 | Federal-Mogul Corporation | Process for making sectionalized precision components |
| CN2201513Y (en) * | 1994-06-21 | 1995-06-21 | 青岛轴承厂 | Four-point contact thrust ball bearing |
| CN1696525A (en) * | 2004-05-15 | 2005-11-16 | 洛阳轴承集团有限公司 | Manufacturing method of group-assorted bulge quantity of angular contacted ball bearing |
| CN2718314Y (en) * | 2004-06-23 | 2005-08-17 | 洛阳轴研科技股份有限公司 | Four point contact series type thrust ball bearing |
| CN201053861Y (en) * | 2007-06-25 | 2008-04-30 | 宝山钢铁股份有限公司 | Double row conical rolling bearing clearance valve device |
| CN201162768Y (en) * | 2008-02-01 | 2008-12-10 | 西南石油大学 | Long life screw drill transmission shaft bearing with cylindrical roller |
| CN201461734U (en) * | 2009-04-28 | 2010-05-12 | 河南省宇华轴承有限公司 | Multi-row tapered roller thrust bearing and steel ball combined bearing for petroleum oil screw stem drilling tool |
| CN101957163A (en) * | 2010-08-11 | 2011-01-26 | 洛阳轴研科技股份有限公司 | Method for measuring axial clearance and preloading chearance of face-to-face angular contact ball bearing |
| JP2013228034A (en) * | 2012-04-25 | 2013-11-07 | Nsk Ltd | Multiple row combination ball bearing |
| CH711020A2 (en) * | 2015-04-21 | 2016-10-31 | Jesa Sa | Ball bearings and method for assembling such a ball bearing. |
| CN105782237A (en) * | 2016-05-17 | 2016-07-20 | 中山市盈科轴承制造有限公司 | Bi-inner-ring and double-row angular contact thrust ball bearing and preloading interval optimization method thereof |
| JP2020133688A (en) * | 2019-02-14 | 2020-08-31 | 日本精工株式会社 | Multi-row ball bearing |
Non-Patent Citations (1)
| Title |
|---|
| 多列向心推力球轴承;于连江，陈国良;《机械制造》;19970131(第1期);说明书第14-15页、附图1-3 * |
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| CN113294433A (en) | 2021-08-24 |
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