CN212337895U - Plane thrust slewing bearing - Google Patents
Plane thrust slewing bearing Download PDFInfo
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- CN212337895U CN212337895U CN202020655864.8U CN202020655864U CN212337895U CN 212337895 U CN212337895 U CN 212337895U CN 202020655864 U CN202020655864 U CN 202020655864U CN 212337895 U CN212337895 U CN 212337895U
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- slewing bearing
- preparation
- ring
- support
- raceways
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Abstract
The utility model relates to a plane thrust slewing bearing, slewing bearing has the multirow raceway a plurality of rolling elements have been arranged in each row of raceway of multirow raceway, wherein, slewing bearing has the upper circle that is in axial upper portion and the lower circle that is in axial lower part, the multirow raceway is in the upper circle with arrange in the coplanar and have different radiuses down between the circle.
Description
Technical Field
The utility model relates to a plane thrust slewing bearing.
Background
In some machine tools in which the requirements for the accuracy, in particular the flatness, of the finished rotary bearing are very high, while at the same time the machine is continuously operated, the life of the rotary bearing must also meet quite high requirements. In some of these machines, the loading conditions are single and only axial forces are present. Conventional slewing bearings, which typically have an inner and outer race configuration and only a single row of raceways in one axial plane, suffer from the following problems due to structural, cross-sectional size limitations:
1) in the traditional combined structure, even if the precision of a single part is high, the precision after the finished product still hardly meets the requirement;
2) after the device is used for a period of time, the precision is reduced due to abrasion;
3) the traditional structure type is limited in structure, and more roller paths cannot be designed in a limited size so as to greatly prolong the service life of theoretical calculation.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the utility model provides a plane thrust slewing bearing, slewing bearing has the multirow raceway a plurality of rolling elements have been arranged in each row raceway of multirow raceway, wherein, slewing bearing has the upper ring that is in axial upper portion and the lower circle that is in axial lower part, the multirow raceway is in the upper ring with arrange in the coplanar and have different radiuses down between the circle.
Advantageously, the rolling bodies arranged in adjacent raceways are arranged offset in the circumferential direction.
Advantageously, the upper end surface of the upper ring and the lower end surface of the lower ring are in surface contact with and pressed against the upper support and the lower support of the slewing bearing, respectively.
Advantageously, the slewing bearing is designed with a cage for fixing the position of the plurality of rolling elements.
Advantageously, the holder is configured with a support and stop structure for connection to the machine tool main body.
Advantageously, the rolling bodies are steel balls.
According to the utility model discloses a plane thrust slewing bearing's technical advantage lies in:
1. the design without bolts is adopted, the loading condition is single, and only axial force exists, so that the design without bolts can be adopted, the sectional area is saved, and a plurality of rows of rolling paths can be designed in a limited space so as to meet the requirement of ultra-long service life;
2. due to the fact that no other layout exists in the supporting space, the multi-raceway design can be designed into a plurality of rows of raceways, and the design life is prolonged to the greatest extent;
3. the structure is simple, and the structure is designed into an upper ring structure and a lower ring structure with simple forms because the structure only bears axial force;
4. due to the design of the upper ring structure and the lower ring structure, parts are not connected with each other, so that the machining precision can be guaranteed to the maximum extent, and the requirement of ultra-precision flatness is met;
5. the design of the retainer, because of the structural design of the support, the retainer is required to be used for fixing the steel balls on each row of rolling paths so as to meet the normal operation of the support and enhance the stability of the support during operation;
6. aiming at the retainer, a supporting and limiting structure is separately designed and connected with a host machine, so that the position of the retainer is ensured, and the normal operation of the retainer is ensured.
Drawings
Embodiments according to the present invention are explained in detail below with reference to the accompanying drawings. The sole figures show:
fig. 1 is a side sectional view of a flat thrust slewing bearing according to the invention with rows of steel balls as rolling bodies, when mounted on a machine tool.
In the figures, identical or functionally identical components are denoted by the same reference numerals. The embodiments shown in the figures are only schematic representations and do not necessarily show dimensional relationships between the various components. Furthermore, the embodiments do not limit the scope of the present invention.
Detailed Description
Fig. 1 shows a side sectional view of a flat thrust slewing bearing according to the invention with a plurality of rows of steel balls as rolling bodies, when mounted on a machine tool. As can be seen from fig. 1, the flat thrust slewing bearing according to the invention is mounted to a machine tool by means of an upper support 1 and a lower support 6. The upper support 1 presses the upper end face of the upper ring 2 of the plane thrust slewing bearing, and the lower support 6 presses the lower end face of the lower ring 5 of the plane thrust slewing bearing. Steel balls 3 are arranged between the lower end surface of the upper ring 2 and the upper end surface of the lower ring 5 as rolling bodies of the slewing bearing. Here, other types of rolling elements are also possible. In addition, a retainer 3 is provided for maintaining the position of the steel ball 4 and enhancing the smoothness of the slewing bearing in operation.
In the present embodiment, the slewing bearing is acted upon by axial force only during operation of the machine tool, and the upper ring 2 and the lower ring 5 are clamped between the upper support 1 and the lower support 6 in the axial direction. Therefore, parts for fixed connection between the inner ring and the outer ring which are required by the slewing bearing with the common inner and outer ring structures and the support are omitted, so that the machining precision can be ensured to the maximum extent, and the requirement of ultra-precision flatness is met. In addition, radial movements of the inner and outer rings of the conventional slewing bearing, which are caused by the machining precision when subjected to axial forces, are avoided.
According to the utility model discloses a plane thrust slewing bearing has a plurality of steel balls 4, wherein, these steel balls 4 are arranged in the ascending coplanar of axial. The steel balls 4 are arranged in rows of raceways having different radii, seen in the circumferential direction of the planar thrust slewing bearing. In order to save space as much as possible, the steel balls 4 arranged in the radially adjacent raceways are preferably arranged offset in the circumferential direction.
In addition, the retainer 3 for fixing the position of the steel ball 4 has a not-shown supporting and limiting structure for connecting with a machine tool main body, and the position of the retainer is ensured, thereby ensuring the normal operation of the retainer.
The above embodiments are merely for illustrative purposes to illustrate the present invention, but the present invention is not limited to the above embodiments. On the basis of the embodiments described, a person skilled in the art will be able to make any modifications, alterations or combinations of the features illustrated in the present description without departing from the scope of the invention.
Claims (6)
1. A planar thrust slewing bearing having a plurality of rows of raceways with a plurality of rolling elements arranged in each of the rows of raceways,
it is characterized in that the preparation method is characterized in that,
the slewing bearing is provided with an upper ring at the upper part in the axial direction and a lower ring at the lower part in the axial direction, and the plurality of rows of raceways are arranged in the same plane between the upper ring and the lower ring and have different radiuses.
2. The planar thrust slewing bearing of claim 1,
it is characterized in that the preparation method is characterized in that,
the rolling elements arranged in adjacent raceways are arranged offset in the circumferential direction.
3. Planar thrust slewing bearing according to claim 1 or 2,
it is characterized in that the preparation method is characterized in that,
the upper end surface of the upper ring and the lower end surface of the lower ring are in surface contact with the upper support and the lower support of the slewing bearing respectively and are pressed against the upper support and the lower support.
4. Planar thrust slewing bearing according to claim 1 or 2,
it is characterized in that the preparation method is characterized in that,
the slewing bearing is configured with a cage for fixing the position of the plurality of rolling elements.
5. The planar thrust slewing bearing of claim 4,
it is characterized in that the preparation method is characterized in that,
the holder is configured with a support and limit structure for connection with a machine tool host.
6. Planar thrust slewing bearing according to claim 1 or 2,
it is characterized in that the preparation method is characterized in that,
the rolling bodies are steel balls.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020655864.8U CN212337895U (en) | 2020-04-26 | 2020-04-26 | Plane thrust slewing bearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020655864.8U CN212337895U (en) | 2020-04-26 | 2020-04-26 | Plane thrust slewing bearing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212337895U true CN212337895U (en) | 2021-01-12 |
Family
ID=74074183
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020655864.8U Active CN212337895U (en) | 2020-04-26 | 2020-04-26 | Plane thrust slewing bearing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212337895U (en) |
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2020
- 2020-04-26 CN CN202020655864.8U patent/CN212337895U/en active Active
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