CN113062920B - Pivoting support for aligning heavy load - Google Patents
Pivoting support for aligning heavy load Download PDFInfo
- Publication number
- CN113062920B CN113062920B CN202110424445.2A CN202110424445A CN113062920B CN 113062920 B CN113062920 B CN 113062920B CN 202110424445 A CN202110424445 A CN 202110424445A CN 113062920 B CN113062920 B CN 113062920B
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- Prior art keywords
- ring
- aligning
- roller path
- slewing bearing
- sealing
- 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.)
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- 229910000831 Steel Inorganic materials 0.000 claims abstract description 12
- 239000010959 steel Substances 0.000 claims abstract description 12
- 238000007789 sealing Methods 0.000 claims description 37
- 238000002347 injection Methods 0.000 claims description 6
- 239000007924 injection Substances 0.000 claims description 6
- 238000005461 lubrication Methods 0.000 claims description 3
- 230000007704 transition Effects 0.000 claims description 3
- 238000012545 processing Methods 0.000 abstract description 6
- 230000002035 prolonged effect Effects 0.000 abstract description 3
- 230000005540 biological transmission Effects 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 238000003754 machining Methods 0.000 description 4
- 238000010791 quenching Methods 0.000 description 4
- 230000000171 quenching effect Effects 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 230000002159 abnormal effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000002457 bidirectional effect Effects 0.000 description 2
- 206010006514 bruxism Diseases 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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
- F16C23/00—Bearings for exclusively rotary movement adjustable for aligning or positioning
- F16C23/06—Ball or roller bearings
- F16C23/08—Ball or roller bearings self-adjusting
-
- 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
- F16C23/00—Bearings for exclusively rotary movement adjustable for aligning or positioning
- F16C23/06—Ball or roller bearings
- F16C23/08—Ball or roller bearings self-adjusting
- F16C23/082—Ball or roller bearings self-adjusting by means of at least one substantially spherical surface
-
- 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
- F16C33/66—Special parts or details in view of lubrication
- F16C33/6637—Special parts or details in view of lubrication with liquid lubricant
- F16C33/6659—Details of supply of the liquid to the bearing, e.g. passages or nozzles
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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
- F16C33/72—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
- F16C33/784—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
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Support Of The Bearing (AREA)
- Rolling Contact Bearings (AREA)
Abstract
The invention discloses a slewing bearing for aligning heavy load, and relates to the technical field of machinery. The slewing bearing for the aligning heavy load comprises an outer ring, an inner upper ring, an inner lower ring, steel balls, spherical rollers and drum rollers, wherein the bottom of the inner upper ring and the upper part of the inner lower ring are respectively provided with an upper row of axial aligning roller paths formed by an upper roller path and a lower roller path with semicircular surfaces, and the outer side of the inner lower ring is provided with two grooves with inclined angles a, wherein the range of a is 4-13 degrees, and arc-shaped roller paths are processed in the grooves. The aligning type slewing bearing for heavy load realizes that the axial load and the radial load bearing capacity of the slewing bearing are improved under the condition that the overall structural size and the number of the rollways are not increased, the processing difficulty of the rollways and the tooth-shaped parts of the slewing bearing is reduced, meanwhile, the stable vibration is small during operation, the impact load born by the rollways and the teeth is low, the overall service life of the slewing bearing is prolonged, and the aligning type slewing bearing has good economic value.
Description
Technical Field
The invention relates to the technical field of machinery, in particular to a slewing bearing for aligning heavy load.
Background
The slewing bearing is an important transmission part which is required to perform relative slewing motion between two objects and is required to bear axial force, radial force and tipping moment at the same time, and is widely applied to industries such as ship equipment, engineering machinery, light industrial machinery, metallurgical machinery, medical machinery, industrial machinery and the like along with the rapid development of the machinery industry.
In recent years, with the continuous development of engineering machinery industry, more requirements are put forth on the design of the slewing bearing, and when the requirements of the client carrying capacity are large and the requirements on the structural outline dimension are limited, the conventional structural design of the conventional slewing bearing in the existing JB/T2300-2011 standard is difficult to meet.
At present, when bearing larger axial load and overturning moment, the existing slewing bearing product is mainly realized by means of quenching the raceway hardening layer with higher hardness and depth, carrying out secondary machining procedures of grinding teeth on tooth shapes and the like, has high machining cost and still has still unsatisfactory effect, can still generate obvious shaking and abnormal sound when being used on equipment such as a crane, influences the field use of customers, and has generated certain batch returns.
Disclosure of Invention
(One) solving the technical problems
Aiming at the defects of the prior art, the invention provides the aligning type slewing bearing for heavy load, which solves the problems that the existing slewing bearing product is mainly realized by means of quenching a raceway hardening layer with higher hardness and depth, carrying out secondary machining procedures of grinding teeth on tooth shapes, and the like, has high machining cost and still unsatisfactory effect, can still generate obvious shaking and abnormal sound when being used on equipment such as a crane, affects the field use of customers, and has generated certain batch returning.
(II) technical scheme
In order to achieve the above purpose, the invention is realized by the following technical scheme: the slewing bearing for the aligning type heavy load comprises an outer ring, an inner upper ring, an inner lower ring, steel balls, spherical rollers and drum-shaped rollers, wherein an upper row of axial aligning roller paths are formed by an upper roller path and a lower roller path which are respectively provided with semicircular surfaces at the bottom of the inner upper ring and the upper part of the inner lower ring, two grooves with inclination angles a are formed at the outer side of the inner lower ring, wherein the range of a is 4-13 DEG, an arc-shaped roller path is processed in the grooves, a middle row of radial aligning roller paths are formed by the inner grooves and the arc-shaped roller paths on the inner side surface of the outer ring, an upper inclined arc-shaped roller path and a lower inclined arc-shaped roller path on the inner side of the bottom of the outer ring are formed at the outer side of the bottom of the inner lower ring, the inclination angle between the horizontal center line of the axial radial aligning roller path and the horizontal plane is b, the range of b is 16-28 DEG, the cross section of the axial radial aligning roller paths is drum-shaped, the middle is a larger convexity arc, and the edges at the two sides of the axial radial aligning roller paths are large-diameter arc arcs so as to smoothly transition with convexity arcs;
The steel balls are separated by an integral retainer, the spherical rollers are separated by the integral retainer, the spherical rollers are alternately arranged along the circumferential direction, and the drum-shaped rollers are separated by the integral retainer with taper;
The inner side surface of the inner upper ring is provided with an oil passage communicated with the ball race and is provided with an oil injection nozzle, so that lubrication of the upper-row axial aligning ball race and the middle-row radial aligning ball race is realized, and the inner side surface of the inner lower ring is provided with an oil passage communicated with the ball race of the drum roller and is provided with the oil injection nozzle.
Preferably, the lower end face of the inner upper ring is provided with two sections of sealing grooves, a sealing ring is arranged between the sealing grooves and the sealing groove arranged on the upper end face of the inner lower ring, and the sealing groove arranged on the lower end face of the inner upper ring, the sealing groove arranged on the upper end face of the inner lower ring and the sealing ring form a seal.
Preferably, the outer side of the inner upper ring, the upper end surface of the outer ring and the inner side surface of the lower part of the outer ring are provided with sealing grooves, sealing strips are arranged among the sealing grooves formed in the outer side of the inner upper ring, the upper end surface of the outer ring and the inner side surface of the lower part of the outer ring, and the sealing grooves formed in the outer side of the inner upper ring, the upper end surface of the outer ring and the inner side surface of the lower part of the outer ring and the sealing strips form sealing.
(III) beneficial effects
The invention provides a slewing bearing for aligning heavy load. The beneficial effects are as follows: compared with the slewing bearing in the prior art, the aligning type slewing bearing for heavy load is still three rows of raceways, axial load and overturning moment are borne by the lower row of drum rollers and steel balls at the same time, the main bearing raceways are moved from the most upper row to the most lower row, the raceway quenching of the outer ring can be completed in one step during processing, teeth on the outer ring are processed at the side close to the upper side end face and far away from the main bearing area, the slewing bearing has small influence on gear transmission of the outer ring when in transmission loading, the service life of outer ring teeth can be prolonged while the precision requirement on tooth processing is reduced, the drum rollers of the lowest row are tightly attached to the raceways, the bearing capacity is high, and the slewing bearing can realize axial and radial bidirectional aligning.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
Fig. 2 is an enlarged view of a portion of the right side of the structure of the present invention.
In the figure: 1. an outer ring; 2. an inner upper ring; 3. an inner lower ring; 4. a seal ring; 5. a steel ball; 6. spherical roller; 7. a sealing strip; 8. drum rollers; A. an upper row axial aligning rollaway nest; B. a middle row radial aligning rollaway nest; C. axial and radial aligning rollaway nest.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1-2, the present invention provides a technical solution: the pivoting support for the aligning type heavy load comprises an outer ring 1, an inner upper ring 2, an inner lower ring 3, steel balls 5, spherical rollers 6 and drum rollers 8, wherein sealing grooves are formed in the outer side of the inner upper ring 2, the upper end face of the outer ring 1 and the inner side face of the lower part of the outer ring 1, sealing strips 7 are arranged among the outer side of the inner upper ring 2, the upper end face of the outer ring 1 and the sealing grooves formed in the inner side face of the lower part of the outer ring 1, the outer side of the inner upper ring 2, the upper end face of the outer ring 1, the sealing grooves formed in the inner side face of the lower part of the outer ring 1 and the sealing strips 7 form a seal, two sections of sealing grooves are formed in the lower end face of the inner upper ring 2, sealing rings 4 are arranged between the sealing grooves formed in the lower end face of the inner upper ring 2, sealing grooves formed in the upper end face of the inner lower ring 3 and the sealing rings 4 form a seal, the bottom of the inner upper ring 2 and the upper part of the inner lower ring 3 are respectively provided with an upper raceway and a lower raceway with semicircular surfaces to form an upper-row axial aligning raceway A, the outer side of the inner lower ring 3 is provided with two grooves with inclined angles a, wherein the range of a is 4-13 degrees, the grooves are internally provided with circular arc raceways, the grooves are respectively provided with a middle-row radial aligning raceway B with circular arc raceways on the inner side surface of the outer ring 1, the bottom of the inner lower ring 3 is provided with an upper inclined circular arc raceway and a lower inclined circular arc raceway on the inner side of the bottom of the outer ring 1 to form an axial radial aligning raceway C, the inclined angle between the horizontal central line of the axial radial aligning raceway C and the horizontal plane is B, the range of B is 16-28 degrees, the cross section of the axial radial aligning raceway C is drum-shaped, the middle is a larger convexity circular arc, the edges of the two sides of the axial radial aligning roller path C are large-diameter circular arcs so as to smoothly transition with the convexity circular arcs;
The steel balls 5 are separated by an integral retainer, the spherical rollers 6 are separated by the integral retainer, the spherical rollers 6 are alternately arranged along the circumferential direction, and the drum-shaped rollers 8 are separated by the integral retainer with taper;
the inner side surface of the inner upper ring 2 is provided with an oil passage communicated with the rollaway nest of the steel ball 5 and is provided with an oil injection nozzle, so that lubrication of the upper-row axial aligning rollaway nest A and the middle-row radial aligning rollaway nest B is realized, and the inner side surface of the inner lower ring 3 is provided with an oil passage communicated with the rollaway nest of the drum roller 8 and is provided with the oil injection nozzle.
In summary, compared with the slewing bearing in the prior art, the slewing bearing for aligning heavy load is still three rows of raceways, the lower row of drum rollers and steel balls are adopted for bearing axial load and overturning moment at the same time, the main bearing raceways are moved from the uppermost row to the lowermost row in general, the raceway quenching of the outer ring can be completed in one step during processing, teeth on the outer ring are processed at the side close to the upper end face and far away from the main bearing area, the slewing bearing has little influence on the gear transmission of the outer ring when in transmission loading, the service life of the outer ring teeth can be prolonged while the precision requirement on tooth processing is reduced, the drum rollers of the lowermost row are tightly attached to the raceways, the bearing capacity is high, and the slewing bearing can realize axial and radial bidirectional aligning, has small stable vibration when the inner ring and the outer ring are in heavy running, can be more suitable for the working condition requiring precise transmission, the slewing bearing can improve the axial load and the radial load bearing capacity of the slewing bearing without increasing the external structural size and the number of the raceways, the processing difficulty of the raceways and the tooth-shaped parts of the slewing bearing is reduced, meanwhile, the stability vibration is small during running, the drum rollers of the bottoming and the bearing has low bearing impact load.
Therefore, the slewing bearing provided by the invention can bear larger axial load, overturning moment and radial load, can realize the axial and radial aligning functions at the same time, has high bearing capacity, is stable in operation, small in vibration and easy in structure disassembly and replacement.
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.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (3)
1. The utility model provides a slewing bearing for aligning heavy load, includes outer lane (1), interior upper and lower circle (2), interior lower circle (3), steel ball (5), sphere roller (6) and drum roller (8), its characterized in that: an upper row axial aligning roller path (A) is formed by an upper roller path and a lower roller path which are respectively provided with a semicircular surface at the bottom of the inner upper ring (2) and the upper part of the inner lower ring (3), two grooves with inclined angles a are formed at the outer side of the inner lower ring (3), wherein the range of a is 4-13 degrees, an arc-shaped roller path is processed in the grooves, a middle row radial aligning roller path (B) is formed by the arc-shaped roller path and the arc-shaped roller path on the inner side surface of the outer ring (1), an upper inclined arc-shaped roller path and a lower inclined arc-shaped roller path on the inner side of the bottom of the outer ring (1) are formed at the outer side of the bottom of the inner lower ring (3), an axial radial aligning roller path (C) is formed by the inclined angle B between the horizontal central line of the axial radial aligning roller path (C) and the horizontal plane, the range of B is 16-28 degrees, the section shape of the axial radial aligning roller path (C) is drum-shaped, the middle is provided with a convexity arc, and the edges at two sides of the axial radial aligning roller path (C) are large-diameter arcs, and the convexity arc transition is formed between the two arcs;
The steel balls (5) are separated by an integral retainer, the spherical rollers (6) are separated by the integral retainer, the spherical rollers (6) are alternately arranged along the circumferential direction, and the drum-shaped rollers (8) are separated by the integral retainer with taper;
The inner side surface of the inner upper ring (2) is provided with an oil passage communicated with the rollaway nest of the steel ball (5) and is provided with an oil injection nozzle, so that lubrication of the upper row axial aligning rollaway nest (A) and the middle row radial aligning rollaway nest (B) is realized, and the inner side surface of the inner lower ring (3) is provided with an oil passage communicated with the rollaway nest of the drum roller (8) and is provided with the oil injection nozzle.
2. The slewing bearing for aligning heavy load according to claim 1, wherein: two sections of sealing grooves are formed in the lower end face of the inner upper ring (2), a sealing ring (4) is arranged between the sealing grooves and the sealing groove formed in the upper end face of the inner lower ring (3), and the sealing groove formed in the lower end face of the inner upper ring (2), the sealing groove formed in the upper end face of the inner lower ring (3) and the sealing ring (4) form a seal.
3. The slewing bearing for aligning heavy load according to claim 1, wherein: sealing grooves are formed in the outer side of the inner upper ring (2), the upper end face of the outer ring (1) and the inner side face of the lower portion of the outer ring (1), sealing strips (7) are arranged among the sealing grooves formed in the outer side of the inner upper ring (2), the upper end face of the outer ring (1) and the inner side face of the lower portion of the outer ring (1), and the sealing grooves formed in the outer side of the inner upper ring (2), the upper end face of the outer ring (1) and the inner side face of the lower portion of the outer ring (1) and the sealing strips (7) form sealing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110424445.2A CN113062920B (en) | 2021-04-20 | 2021-04-20 | Pivoting support for aligning heavy load |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110424445.2A CN113062920B (en) | 2021-04-20 | 2021-04-20 | Pivoting support for aligning heavy load |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113062920A CN113062920A (en) | 2021-07-02 |
| CN113062920B true CN113062920B (en) | 2024-05-10 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110424445.2A Active CN113062920B (en) | 2021-04-20 | 2021-04-20 | Pivoting support for aligning heavy load |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113062920B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114135573A (en) * | 2021-12-13 | 2022-03-04 | 中国铁建重工集团股份有限公司 | Main bearing of heading machine |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB191220624A (en) * | 1912-09-10 | 1913-07-24 | Auto Machinery Company Ltd | An Improved Combined Journal and Thrust Ball Bearing. |
| GB191225955A (en) * | 1912-11-12 | 1913-07-31 | Auto Machinery Company Ltd | An Improved Combined Journal and Thrust Bearing. |
| JP2001323938A (en) * | 2000-05-17 | 2001-11-22 | Nsk Ltd | Method and device for measuring radial clearance of rolling bearing |
| CN205876977U (en) * | 2016-07-19 | 2017-01-11 | 马鞍山方圆精密机械有限公司 | Three rows of central pest slewing ring of heavy radial load |
| CN206754152U (en) * | 2017-05-22 | 2017-12-15 | 人本集团有限公司 | Double-row self-aligning roller bearing and its retainer |
| CN207762128U (en) * | 2017-12-06 | 2018-08-24 | 山东巨通机械有限公司 | A kind of slewing bearing with three rows of rollers |
| CN211715536U (en) * | 2020-03-27 | 2020-10-20 | 马鞍山方圆精密机械有限公司 | Three-row column type slewing bearing with labyrinth seal structure |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1575554B1 (en) * | 1966-09-28 | 1972-05-31 | Magyar Hajo Es Darugyar | Crane support bearings |
-
2021
- 2021-04-20 CN CN202110424445.2A patent/CN113062920B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB191220624A (en) * | 1912-09-10 | 1913-07-24 | Auto Machinery Company Ltd | An Improved Combined Journal and Thrust Ball Bearing. |
| GB191225955A (en) * | 1912-11-12 | 1913-07-31 | Auto Machinery Company Ltd | An Improved Combined Journal and Thrust Bearing. |
| JP2001323938A (en) * | 2000-05-17 | 2001-11-22 | Nsk Ltd | Method and device for measuring radial clearance of rolling bearing |
| CN205876977U (en) * | 2016-07-19 | 2017-01-11 | 马鞍山方圆精密机械有限公司 | Three rows of central pest slewing ring of heavy radial load |
| CN206754152U (en) * | 2017-05-22 | 2017-12-15 | 人本集团有限公司 | Double-row self-aligning roller bearing and its retainer |
| CN207762128U (en) * | 2017-12-06 | 2018-08-24 | 山东巨通机械有限公司 | A kind of slewing bearing with three rows of rollers |
| CN211715536U (en) * | 2020-03-27 | 2020-10-20 | 马鞍山方圆精密机械有限公司 | Three-row column type slewing bearing with labyrinth seal structure |
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| Publication number | Publication date |
|---|---|
| CN113062920A (en) | 2021-07-02 |
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