CN219929476U - Three-row roller slewing bearing for large crawler crane - Google Patents
Three-row roller slewing bearing for large crawler crane Download PDFInfo
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- CN219929476U CN219929476U CN202320761413.6U CN202320761413U CN219929476U CN 219929476 U CN219929476 U CN 219929476U CN 202320761413 U CN202320761413 U CN 202320761413U CN 219929476 U CN219929476 U CN 219929476U
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- row
- roller
- inner ring
- roller row
- slewing bearing
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- 238000007789 sealing Methods 0.000 claims description 11
- 229910000831 Steel Inorganic materials 0.000 claims description 9
- 239000010959 steel Substances 0.000 claims description 9
- 230000004308 accommodation Effects 0.000 claims description 6
- 239000003921 oil Substances 0.000 abstract description 22
- 239000010687 lubricating oil Substances 0.000 abstract description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 230000001050 lubricating effect Effects 0.000 abstract description 2
- 230000007246 mechanism Effects 0.000 description 4
- 238000005461 lubrication Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 210000002445 nipple Anatomy 0.000 description 1
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Abstract
The utility model discloses a three-row roller slewing bearing for a large crawler crane, which comprises an outer ring, an inner ring structure, a first roller row, a second roller row and a third roller row. By arranging the three roller rows, the utility model can effectively reduce the size requirement of the roller rows compared with the arrangement of the roller rows of a single row when the crawler crane is used, reduce the manufacturing and assembling difficulty, and ensure that the central axes of the first roller row and the second roller row are perpendicular to the central axis of the third roller row, so that the first roller row, the second roller row and the third roller row can bear radial force and axial force respectively, and can effectively ensure the use stability and the service life compared with the single row of rollers independently. In addition, the utility model is also provided with the first oil duct and the second oil duct, so that the lubricating oil is conveniently added in the first roller row, the second roller row and the third roller row, and the lubricating requirement of the utility model is effectively ensured.
Description
Technical Field
The utility model relates to the technical field of engineering equipment, in particular to a three-row roller slewing bearing for a large crawler crane.
Background
The crawler crane, also called crawler crane, is a crawler travelling mechanism, and is a crane which can travel by crawler, has high lifting capacity and strong lifting capacity, and can travel by lifting weight. Rotating structures, such as booms, in crawler cranes often require the use of slewing bearings to ensure efficient rotation.
Most common slewing bearings are single row type, i.e. only a single row of rollers is provided in the slewing bearing for bearing axial and radial forces. However, for large-scale crawler cranes, slewing bearings with diameters of more than 1500mm are often needed, and for the large-scale crawler crane, if only a single-row structure is adopted, the size of rollers needed to be used is quite large, the manufacturing and assembling difficulties are great, and the axial force and the radial force generated by the action of the large-scale crawler crane are great, and the stability and the service life of the large-scale crawler crane are difficult to effectively guarantee due to the fact that only a single row of rollers bear.
On the other hand, since large-sized crawler cranes often require a large amount of motion, there is a high demand for lubrication of the rollers in the slewing bearing, but it is often difficult to effectively add lubricating oil to the components such as the rollers in the slewing bearing after long-term use.
Disclosure of Invention
The present utility model aims to provide a three row roller slewing bearing for a large crawler crane, which can solve one or more of the problems.
According to one aspect of the utility model, a three-row roller slewing bearing for a large crawler crane is provided, and the three-row roller slewing bearing comprises an outer ring, an inner ring structure, a first roller row, a second roller row and a third roller row, wherein the inner ring structure comprises an upper inner ring and a lower inner ring, the upper inner ring is arranged on the lower inner ring and is connected with the lower inner ring, the outer ring is arranged on the outer side of the inner ring structure, a first accommodating cavity is surrounded by the outer ring and the upper inner ring, a second accommodating cavity is surrounded by the outer ring and the lower inner ring, a third accommodating cavity is surrounded by the outer ring, the upper inner ring and the lower inner ring, the first roller row is arranged in the first accommodating cavity and is respectively abutted against the outer ring and the upper inner ring, the second roller row is arranged in the third accommodating cavity and is respectively abutted against the upper inner ring and the lower inner ring, the central axes of the first roller row and the second roller row are perpendicular to the central axes of the third row, a first oil duct is arranged on the inner ring, a second accommodating cavity is arranged on the inner ring, and the second oil duct is communicated with the second accommodating cavity, and the first oil duct is communicated with the second accommodating cavity.
The beneficial effects of the utility model are as follows: by arranging the three roller rows, the utility model can effectively reduce the size requirement of the roller rows compared with the arrangement of the roller rows of a single row when the crawler crane is used, reduce the manufacturing and assembling difficulty, and ensure that the central axes of the first roller row and the second roller row are perpendicular to the central axis of the third roller row, so that the first roller row, the second roller row and the third roller row can bear radial force and axial force respectively, and can effectively ensure the use stability and the service life compared with the single row of rollers independently. In addition, the utility model is also provided with the first oil duct and the second oil duct, so that the lubricating oil is conveniently added in the first roller row, the second roller row and the third roller row, and the lubricating requirement of the utility model is effectively ensured.
In some embodiments, the central axes of the first roller row and the second roller row are parallel to the central axis of the inner ring structure, and the central axis of the third roller row is perpendicular to the central axis of the inner ring structure. Thus, the first roller row and the second roller row can be used to withstand radial forces and the third roller row can be used to withstand axial forces.
In some embodiments, the outer side of the upper inner ring is provided with a first extension, the outer ring is provided with a hole, the inner wall of the hole is provided with a protrusion, and the first extension, the inner wall of the hole and the protruding top enclose a first accommodating cavity.
In some embodiments, the outer side of the lower inner ring is provided with a second extension, and the second extension, the inner wall of the hole and the protruding bottom enclose a second accommodation cavity.
In some embodiments, a groove is formed in the outer side portion of the upper inner ring, and a third accommodating cavity is defined by the groove, the top portion of the lower inner ring and the protruding side portion.
In some embodiments, the axial gap between the outer ring and the inner ring structure is 0.03-0.10 mm, and the radial gap between the outer ring and the inner ring structure is 0.06-0.25 mm. The clearance limitation can ensure the assembly precision of the outer ring and the inner ring structure within the above range.
In some embodiments, the outer ring, the upper inner ring and the lower inner ring are all 260 HB-310 HB in hardness, the outer ring is a 42CrMo steel outer ring, the upper inner ring is a 42CrMo steel upper inner ring, and the lower inner ring is a 42CrMo steel lower inner ring. Therefore, the outer ring, the upper inner ring and the lower inner ring can be ensured to have enough strength and hardness to be suitable for the use of a large crawler crane.
In some embodiments, the utility model further comprises a sealing strip, wherein the outer ring is provided with a concave position, and the sealing strip is embedded on the concave position and abuts against the side part of the upper inner ring. The sealing strip can play a certain sealing role on the gap generated after the outer ring and the upper inner ring are installed.
In some embodiments, the lower inner ring is provided with a chute and the outer ring is provided with a recess, the chute and recess constituting an assembly groove.
Drawings
Fig. 1 is a cross-sectional view of a schematic structural view of a three-row roller slewing bearing for a large crawler in accordance with an embodiment of the present utility model.
Fig. 2 is a schematic cross-sectional view of the outer race of the three-row roller slewing bearing for a large crawler according to an embodiment of the present utility model.
Fig. 3 is a cross-sectional view schematically illustrating a structure of an upper inner race of a three-row roller slewing bearing for a large-scale crawler crane according to an embodiment of the present utility model.
Fig. 4 is a cross-sectional view schematically illustrating a structure of a lower inner race of a three-row roller slewing bearing for a large-scale crawler crane according to an embodiment of the present utility model.
In the figure: 1. outer race, 2 inner race structure, 3 first roller row, 4 second roller row, 5 third roller row, 6 sealing strip, 11. Projection, 12. Recess, 13. Recess, 101. First receiving cavity, 102. Second receiving cavity, 103. Third receiving cavity, 21. Upper inner race, 22. Lower inner race, 211. First extension, 212. Recess, 213. First oil gallery, 221. Second extension, 222. Second oil gallery, 223. Chute, 104. Fitting groove.
Detailed Description
The utility model is described in further detail below with reference to the accompanying drawings.
Referring to fig. 1, 2, 3 and 4, the three-row roller slewing bearing for a large crawler crane of the present utility model includes an outer ring 1, an inner ring structure 2, a first roller row 3, a second roller row 4 and a third roller row 5.
The inner ring structure 2 includes an upper inner ring 21 and a lower inner ring 22. The upper inner ring 21 is arranged on the lower inner ring 22, and the upper inner ring 21 and the lower inner ring 22 are fixedly connected through bolts.
The hardness of the outer ring 1, the upper inner ring 21 and the lower inner ring 22 is between 260 HB and 310HB, while the outer ring 1 is an outer ring made of 42CrMo steel, the upper inner ring 21 is an upper inner ring made of 42CrMo steel, and the lower inner ring 22 is a lower inner ring made of 42CrMo steel.
The outer ring 1 is arranged on the outer side of the inner ring structure 2, the axial gap between the outer ring 1 and the inner ring structure 2 after arrangement is between 0.03mm and 0.10mm, and the radial gap between the outer ring 1 and the inner ring structure 2 is between 0.06mm and 0.25mm.
The outer side of the upper inner ring 21 is provided with a first extension part 211, the outer ring 1 is internally provided with a hole, the inner wall of the hole is provided with a bulge 11, and the first extension part 211 of the upper inner ring 21, a part of the inner wall of the hole of the outer ring 1 and the top of the bulge 11 of the outer ring 1 enclose a first accommodating cavity 101. The first roller row 3 is disposed in the first accommodating cavity 101, and the first roller row 3 abuts against the outer ring 1 and the upper inner ring 21 respectively.
The outer side of the lower inner ring 22 is provided with a second extension 221, and the second extension 221 of the lower inner ring 22, the inner wall of the hole of the outer ring 1 and the bottom of the protrusion 11 of the outer ring 1 enclose a second accommodating cavity 102. The second roller row 4 is disposed in the second accommodating cavity 102, and the second roller row 4 abuts against the outer ring 1 and the lower inner ring 22 respectively.
The outer side of the upper inner ring 21 is also provided with a groove 212, and the groove 212 of the upper inner ring 21, the top of the lower inner ring 22 and the side of the protrusion 11 of the outer ring 1 jointly enclose a third accommodating cavity 103. The third roller row 5 is disposed in the third accommodating cavity 103, and the third roller row 5 abuts against the upper inner ring 21 and the lower inner ring 22 respectively.
The outer race 1 and the inner race structure 2 are thus connected by means of the first roller row 3, the second roller row 4 and the third roller row 5. The central axes of the first roller row 3 and the second roller row 4 after the setting are parallel to the central axis of the inner ring structure 2, and the central axis of the third roller row 5 is perpendicular to the central axis of the inner ring structure 2, namely, the central axes of the first roller row 3 and the second roller row 4 are perpendicular to the central axis of the third roller row 5.
The upper inner ring 21 is further provided with a first oil duct 213, the lower inner ring 22 is further provided with a second oil duct 222, the first oil duct 213 is communicated with the first accommodating cavity 101, the second oil duct 222 is communicated with the second accommodating cavity 102, and the first accommodating cavity 101 and the second accommodating cavity 102 are both communicated with the third accommodating cavity 103. The first oil passage 213 and the second oil passage 222 can be provided with a nipple on an opening communicating with the outside, so as to facilitate connection of the oil filling device.
The utility model further comprises a sealing strip 6, the top of the outer ring 1 is provided with a concave position 12, the sealing strip 6 is embedded on the concave position 12, and the sealing strip 6 butts against the side part of the upper inner ring 21, so that the sealing strip 6 can hide and shield the gap between the top of the outer ring 1 and the side part of the upper inner ring 21 to a certain extent.
The bottom of the lower inner ring 22 is provided with a chute 223, the bottom of the outer ring 1 is provided with a recess 13, the chute 223 is communicated with the recess 13 to form an assembly groove 104, and the assembly groove 104 can facilitate the increase of the contact area between the assembly groove and other mechanisms when the assembly groove is assembled on the other mechanisms, and the installation reliability of the assembly groove on the other mechanisms is improved.
The utility model can be used in large track slings, in which case the diameter of the outer ring 1 can preferably be about 1916mm, the inner ring structure 2 can be provided with a central bore, and the diameter of the central bore of the inner ring structure 2 can preferably be about 1510mm, to accommodate the turning of the boom of a large track sling, when it is turned, the first row of balls 3 and the second row of rollers 4 can be subjected to radial forces, while the third row of rollers 5 can be subjected to axial forces. By arranging the three roller rows, compared with the arrangement of a single roller row, the utility model can effectively reduce the size requirement of the roller row, reduce the manufacturing and assembling difficulty, and can effectively ensure the service stability and service life of the utility model because the stress during working is not born by the single roller row.
In addition, the utility model is also provided with the first oil duct 213 and the second oil duct 222, and lubricating oil can be respectively added to the first roller row 3 and the second roller row 4 through the first oil duct 213 and the second oil duct 222, meanwhile, as the first accommodating cavity 101 and the second accommodating cavity 102 are communicated with the third accommodating cavity 103, the lubricating oil added from the first oil duct 213 and the second oil duct 222 can also effectively enter the third accommodating cavity 103 to facilitate the lubrication of the third roller row 5, thereby effectively ensuring the lubrication requirement of the utility model.
What has been described above is merely some embodiments of the present utility model. It will be apparent to those skilled in the art that various modifications and improvements can be made without departing from the spirit of the utility model.
Claims (9)
1. The utility model provides a three row roller slewing bearing that large-scale crawler crane used, its characterized in that includes outer lane, inner circle structure, first roller row, second roller row and third roller row, the inner circle structure includes inner circle and lower inner circle down, go up the inner circle and arrange down on the inner circle to be connected with lower inner circle, the outside of inner circle structure is located to the outer lane, first accommodation chamber is enclosed with last inner circle to the outer lane, second accommodation chamber is enclosed with lower inner circle to the outer lane, go up inner circle and lower inner circle jointly, first roller row locates first accommodation intracavity, and support outer lane and last inner circle respectively, second roller row locates second accommodation intracavity, and support outer lane and lower inner circle respectively, third roller row locates third accommodation intracavity, and support upper inner circle and lower inner circle respectively, the axis of first roller row and second roller row all is perpendicular to the axis of third row, be equipped with first oil duct down, first oil duct and second oil duct intercommunication all hold the chamber, first oil duct and second oil duct intercommunication.
2. The three-row roller slewing bearing for a large crawler crane according to claim 1, wherein the central axes of the first roller row and the second roller row are parallel to the central axis of the inner ring structure, and the central axis of the third roller row is perpendicular to the central axis of the inner ring structure.
3. The three-row roller slewing bearing for a large crawler crane according to claim 1, wherein a first extension part is arranged at the outer side part of the upper inner ring, a hole is arranged at the outer ring, a bulge is arranged on the inner wall of the hole, and a first accommodating cavity is surrounded by the first extension part, the inner wall of the hole and the bulge top.
4. A three row roller slewing bearing for a large crawler as in claim 3 wherein the outer side of the lower inner race is provided with a second extension, the inner wall of the bore and the raised bottom define a second receiving cavity.
5. A three row roller slewing bearing for a large crawler as in claim 3 wherein the outer side of the upper inner race is provided with a groove, and the groove, the top of the lower inner race and the convex side enclose a third receiving cavity.
6. The three-row roller slewing bearing for a large crawler crane according to claim 1, wherein the axial clearance between the outer ring and the inner ring structure is 0.03-0.10 mm, and the radial clearance between the outer ring and the inner ring structure is 0.06-0.25 mm.
7. The three-row roller slewing bearing for a large crawler crane according to claim 1, wherein the hardness of the outer ring, the upper inner ring and the lower inner ring is 260 HB-310 HB, the outer ring is a 42CrMo steel outer ring, the upper inner ring is a 42CrMo steel upper inner ring, and the lower inner ring is a 42CrMo steel lower inner ring.
8. The three-row roller slewing bearing for a large crawler crane according to claim 1, comprising a sealing strip, wherein the outer ring is provided with a concave position, and the sealing strip is embedded on the concave position and abuts against the side part of the upper inner ring.
9. The three-row roller slewing bearing for a large crawler crane according to claim 1, wherein the lower inner ring is provided with a chute, the outer ring is provided with a recess, and the chute and the recess form an assembly groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320761413.6U CN219929476U (en) | 2023-04-10 | 2023-04-10 | Three-row roller slewing bearing for large crawler crane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320761413.6U CN219929476U (en) | 2023-04-10 | 2023-04-10 | Three-row roller slewing bearing for large crawler crane |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219929476U true CN219929476U (en) | 2023-10-31 |
Family
ID=88499398
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320761413.6U Active CN219929476U (en) | 2023-04-10 | 2023-04-10 | Three-row roller slewing bearing for large crawler crane |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219929476U (en) |
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2023
- 2023-04-10 CN CN202320761413.6U patent/CN219929476U/en active Active
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