CN220204422U - Four-point contact ball type slewing bearing - Google Patents
Four-point contact ball type slewing bearing Download PDFInfo
- Publication number
- CN220204422U CN220204422U CN202321591285.1U CN202321591285U CN220204422U CN 220204422 U CN220204422 U CN 220204422U CN 202321591285 U CN202321591285 U CN 202321591285U CN 220204422 U CN220204422 U CN 220204422U
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- Prior art keywords
- inner ring
- ring
- point contact
- contact ball
- outer ring
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- 229910000831 Steel Inorganic materials 0.000 claims abstract description 19
- 239000010959 steel Substances 0.000 claims abstract description 19
- 238000009434 installation Methods 0.000 claims abstract description 8
- 239000004519 grease Substances 0.000 claims description 9
- 238000002347 injection Methods 0.000 claims description 8
- 239000007924 injection Substances 0.000 claims description 8
- 230000000903 blocking effect Effects 0.000 claims description 5
- 238000006073 displacement reaction Methods 0.000 claims description 3
- 230000007704 transition Effects 0.000 claims description 3
- 238000007789 sealing Methods 0.000 abstract description 12
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 230000002035 prolonged effect Effects 0.000 abstract description 3
- 239000004677 Nylon Substances 0.000 description 4
- 229920001778 nylon Polymers 0.000 description 4
- 238000005299 abrasion Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Abstract
The utility model belongs to the technical field of bearing assembly and manufacturing, and particularly relates to a four-point contact ball type slewing bearing which comprises an outer ring, a first inner ring, a second inner ring, steel balls and a retainer, wherein a rollaway nest for assembling the steel balls is formed between the outer ring and the first inner ring, the steel balls are held between the outer ring and the first inner ring through the retainer, the outer ring and the first inner ring are positioned through a stepped platform, the first inner ring and the second inner ring are positioned through annular rabbets, and the end face of the second inner ring is contacted with the end face of the outer ring to prevent the outer ring from axially displacing. The four-point contact ball type slewing bearing disclosed by the utility model has the advantages that the labyrinth structure is carried out on the ferrule, the problem of early failure of the sealing ring is avoided, the service life of the bearing is greatly prolonged, and the requirements of specific installation size, the service life of the bearing and the processing feasibility are met.
Description
Technical Field
The utility model belongs to the technical field of bearing assembly and manufacturing, and particularly relates to a four-point contact ball type slewing bearing.
Background
The common four-point contact ball type slewing bearing sealing structure is a nylon sealing ring, but the nylon sealing ring is suitable for the four-point contact ball type slewing bearing with small size and limited space, and because the nylon sealing ring is small in size and thin in sealing lip, the service life is influenced due to easy abrasion during the working of the bearing, the service life of the nylon sealing ring is far less than that of the bearing, and the risk of failure in advance is provided. Therefore, for the large slewing bearing, the sealing can be performed through the self structure of the turntable bearing, so that the reliability and the service life of the bearing are improved.
Disclosure of Invention
According to the defects of the prior art, the utility model aims to provide the four-point contact ball type slewing bearing, so that the service life of the bearing is effectively prolonged on the basis of guaranteeing the sealing effect of the bearing.
In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows: the utility model provides a four-point contact ball slewing bearing, includes outer lane, first inner circle, second inner circle, steel ball and holder, be formed with the raceway of assembly steel ball between outer lane and the first inner circle, the steel ball keeps between outer lane and first inner circle through the holder, and outer lane and first inner circle pass through the ladder platform location, first inner circle and second inner circle pass through annular tang location, and second inner circle terminal surface and outer lane terminal surface contact, stop outer lane axial displacement.
Further, the step table is positioned such that an inner diameter surface of one side of the outer ring far away from the second inner ring is provided with a step-type annular notch, and the first inner ring is matched with the outer ring through a flange matched with the notch.
Further, the annular spigot is positioned such that an inwards concave annular spigot is formed on one side end surface of the first inner ring, an outwards convex annular spigot matched with the inwards concave annular spigot is formed on one side end surface of the second inner ring, the first inner ring and the second inner ring are positioned through the mutually matched annular spigot, the first inner ring and the second inner ring are provided with corresponding through holes, and installation connection is carried out between the through holes and host equipment through bolts.
Further, the outer diameter of the second inner ring is larger than that of the first inner ring, and the end face of the second inner ring is in contact limit with the end faces of the outer ring and the first inner ring.
Further, the first inner ring comprises a reference part and an extension part, the reference part is matched with the steel ball to form a rollaway nest, one side end surface of the reference part and the second inner ring are positioned through an annular spigot, and one side of the reference part far away from the second inner ring is extended and lengthened along the axial direction to form the extension part.
Further, the outer diameter of the extension part is smaller than that of the reference part, and the outer diameter of the extension part and the outer diameter of the reference part are in step transition.
Further, the reference portion and the extension portion of the first inner ring are integrally formed, and the reference portion and the second inner ring of the first inner ring are provided with corresponding through holes through which the first inner ring and the second inner ring are mounted and coupled with the host device by bolts.
Further, the inner diameter surface of the first inner ring is provided with a grease injection hole, the grease injection hole is communicated to the rollaway nest of the outer diameter surface of the first inner ring through a radial oil duct, and the grease injection hole is plugged through an oil cup.
Further, the outer ring is provided with a ball loading port, and a ball blocking block is assembled in the ball loading port and fixed through a taper pin.
Further, the rollaway nest is a peach-shaped ditch rollaway nest, and the peach-shaped ditch rollaway nest is in four-point contact with the steel ball; the outer ring is provided with a mounting threaded hole.
The beneficial effects of the utility model are as follows: the four-point contact ball type slewing bearing disclosed by the utility model has the advantages that the labyrinth structure is carried out on the ferrule, the problem of early failure of the sealing ring is avoided, the service life of the bearing is greatly prolonged, and the requirements of specific installation size, the service life of the bearing and the processing feasibility are met. The second inner ring, the outer ring and the first inner ring form a labyrinth seal hook together; the complex inner ring is processed into a first inner ring and second inner ring combined form, so that the processing and transportation difficulties of the inner ring of the large turntable are reduced, and the processing precision of the ferrule is improved.
Drawings
FIG. 1 is a schematic view of a four-point contact ball-type slewing bearing of the present utility model;
in the figure: 1. the device comprises an outer ring, a first inner ring, a 2.1 reference part, a 2.2 extension part, 3, a second inner ring, 4, steel balls, 5, a retainer, 6, a ball blocking block, 7, a taper pin, 8, an oil cup, 9, a stepped platform, 10, an annular spigot, 11, a through hole, 12, an oil duct, 13 and an installation threaded hole.
Detailed Description
In order that the above objects, features and advantages of the utility model will be readily understood, a more particular description of the utility model will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model. The present utility model may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the utility model, whereby the utility model is not limited to the specific embodiments disclosed below.
Referring to fig. 1, a four-point contact ball type slewing bearing comprises an outer ring 1, a first inner ring 2, a second inner ring 3, steel balls 4 and a retainer 5, wherein a rollaway nest for assembling the steel balls is formed between the outer ring 1 and the first inner ring 2, the steel balls 4 are held between the outer ring 1 and the first inner ring 2 through the retainer 5, the outer ring 1 and the first inner ring 2 are positioned through a stepped platform 9, the first inner ring 2 and the second inner ring 3 are positioned through an annular spigot 10, and the end face of the second inner ring 3 is contacted with the end face of the outer ring 1 to block axial displacement of the outer ring 1.
Based on the technical scheme, the stepped platform 9 between the outer ring 1 and the first inner ring 2, and the end surface contact between the outer ring 1 and the second inner ring 3 are respectively positioned at two sides of the steel ball 4 to form a ferrule labyrinth seal.
Further, the step 9 is positioned such that an inner diameter surface of the outer ring 1, which is far away from the second inner ring 3, is provided with a stepped annular notch, and the first inner ring 2 is positioned in cooperation with the outer ring 1 through a flange matched with the notch.
Further, the annular spigot 10 is positioned such that an inward concave annular spigot is formed on one side end surface of the first inner ring 2, one side end surface of the second inner ring 3 is provided with an outward convex annular spigot matched with the first inner ring 2, the first inner ring 2 and the second inner ring 3 are positioned through the mutually matched annular spigot, the first inner ring 2 and the second inner ring 3 are provided with corresponding through holes 11, and installation connection is carried out with a host device through the through holes 11 by bolts.
Further, the outer diameter of the second inner ring 3 is larger than that of the first inner ring 2, and the end face of the second inner ring 3 is in contact limit with the end faces of the outer ring 1 and the first inner ring 2.
Further, the first inner ring 2 comprises a reference part 2.1 and an extension part 2.2, the reference part 2.1 is matched with the steel ball 4 to form a rollaway, one side end surface of the reference part 2.1 and the second inner ring 3 are positioned through an annular spigot 10, and one side, far away from the second inner ring 3, of the reference part 2.1 extends and lengthens along the axial direction to form the extension part 2.2.
Further, the outer diameter of the extension part 2.2 is smaller than that of the reference part 2.1, and the outer diameter of the extension part 2.2 is in step transition with that of the reference part 2.1.
Further, the reference portion 2.1 and the extension portion 2.2 of the first inner ring are integrally formed, and the reference portion 2.1 and the second inner ring 3 of the first inner ring are provided with corresponding through holes 11, and are mounted and coupled with a host device by bolts through the through holes 11.
Further, the inner diameter surface of the first inner ring 2 is provided with a grease injection hole, the grease injection hole is communicated to a roller path on the outer diameter surface of the first inner ring 2 through a radial oil duct 12, and the grease injection hole is plugged through an oil cup 8.
Further, the outer ring 1 is provided with a ball loading port, and a ball blocking block 6 is assembled in the ball loading port and fixed through a taper pin 7.
Further, the rollaway nest is a peach-shaped ditch rollaway nest, and the peach-shaped ditch rollaway nest is in four-point contact with the steel ball 4; the outer ring 1 is provided with a mounting threaded hole 13.
The structure of the utility model has the following characteristics: the bearing mainly comprises an outer ring, two inner rings, steel balls, ball blocking blocks, a retainer, a taper pin and an oil cup. The inner diameter of the outer ring is provided with a peach-shaped groove rollaway nest in four-point contact, the outer diameter is provided with a ball-loading hole and is connected with a ball-blocking block by a taper pin, and the lower end surface is provided with a mounting threaded hole. The first inner ring and the second inner ring are combined and are connected with the host equipment in a mounting way through bolts for through holes. And forming a labyrinth sealing structure after being assembled with the outer ring. The inner end surface of the first inner ring is provided with a grease injecting hole and is blocked by an oil cup.
The four-point contact ball type slewing bearing structure meets specific installation requirements, light weight requirements and sealing requirements, and reduces processing difficulty. Sample trial production, delivery, and ground suitability testing have been completed and the product is being used on the host. After the random use by users, the performance is good, and the use requirements of clients are met.
It should be noted that the detailed portions of the present utility model are not described in the prior art.
In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.
In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present utility model, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.
It will be understood that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.
The foregoing list is only the preferred embodiments of the present utility model. Obviously, the utility model is not limited to the above embodiments, but many variations are possible. All modifications directly derived or suggested to one skilled in the art from the present disclosure should be considered as being within the scope of the present utility model.
Claims (10)
1. A four-point contact ball type slewing bearing is characterized in that: the steel ball is held between the outer ring and the first inner ring through the retainer, the outer ring and the first inner ring are positioned through the stepped platform, the first inner ring and the second inner ring are positioned through the annular spigot, and the end face of the second inner ring is contacted with the end face of the outer ring to block axial displacement of the outer ring.
2. The four-point contact ball pivot bearing of claim 1, wherein: the step table is positioned such that an inner diameter surface of one side of the outer ring, which is far away from the second inner ring, is provided with a step-type annular notch, and the first inner ring is matched with the outer ring through a flange matched with the notch.
3. The four-point contact ball pivot bearing of claim 1, wherein: the annular spigot is positioned such that an inwards concave annular spigot is formed on one side end surface of the first inner ring, an outwards convex annular spigot matched with the inwards concave annular spigot is formed on one side end surface of the second inner ring, the first inner ring and the second inner ring are positioned through the mutually matched annular spigot, and the first inner ring and the second inner ring are provided with corresponding through holes, and are connected with a host device in an installation mode through bolts.
4. The four-point contact ball pivot bearing of claim 1, wherein: the outer diameter of the second inner ring is larger than that of the first inner ring, and the end face of the second inner ring is in contact limit with the end faces of the outer ring and the first inner ring.
5. A four point contact ball pivot bearing as defined in any one of claims 1-4 wherein: the first inner ring comprises a reference part and an extension part, the reference part is matched with the steel ball to form a rollaway nest, one side end surface of the reference part and the second inner ring are positioned through an annular spigot, and one side of the reference part, far away from the second inner ring, extends and lengthens along the axial direction to form the extension part.
6. The four-point contact ball pivot bearing of claim 5, wherein: the outer diameter of the extension part is smaller than that of the reference part, and the outer diameter of the extension part and the outer diameter of the reference part are in step transition.
7. The four-point contact ball pivot bearing of claim 5, wherein: the reference part and the extension part of the first inner ring are integrally formed, and the reference part and the second inner ring of the first inner ring are provided with corresponding through holes, and are connected with a host device in an installation mode through bolts.
8. The four-point contact ball pivot bearing of claim 1, wherein: the oil cup is characterized in that a grease injection hole is formed in the inner diameter surface of the first inner ring and is communicated to a roller path on the outer diameter surface of the first inner ring through a radial oil duct, and the grease injection hole is plugged through the oil cup.
9. The four-point contact ball pivot bearing of claim 1, wherein: the outer ring is provided with a ball loading port, and a ball blocking block is assembled in the ball loading port and fixed through a taper pin.
10. The four-point contact ball pivot bearing of claim 1, wherein: the roller path is a peach-shaped groove roller path, and the peach-shaped groove roller path is in four-point contact with the steel ball; the outer ring is provided with a mounting threaded hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321591285.1U CN220204422U (en) | 2023-06-21 | 2023-06-21 | Four-point contact ball type slewing bearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321591285.1U CN220204422U (en) | 2023-06-21 | 2023-06-21 | Four-point contact ball type slewing bearing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220204422U true CN220204422U (en) | 2023-12-19 |
Family
ID=89139897
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321591285.1U Active CN220204422U (en) | 2023-06-21 | 2023-06-21 | Four-point contact ball type slewing bearing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220204422U (en) |
-
2023
- 2023-06-21 CN CN202321591285.1U patent/CN220204422U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |