CN220337279U - Bearing for high-speed motorized spindle - Google Patents
Bearing for high-speed motorized spindle Download PDFInfo
- Publication number
- CN220337279U CN220337279U CN202322133310.8U CN202322133310U CN220337279U CN 220337279 U CN220337279 U CN 220337279U CN 202322133310 U CN202322133310 U CN 202322133310U CN 220337279 U CN220337279 U CN 220337279U
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- Prior art keywords
- bearing
- annular
- ring
- retainer
- rolling
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- 238000005096 rolling process Methods 0.000 claims abstract description 59
- 238000007789 sealing Methods 0.000 claims abstract description 42
- 229920001971 elastomer Polymers 0.000 claims description 18
- 229920000459 Nitrile rubber Polymers 0.000 claims description 4
- 239000004696 Poly ether ether ketone Substances 0.000 claims description 4
- JUPQTSLXMOCDHR-UHFFFAOYSA-N benzene-1,4-diol;bis(4-fluorophenyl)methanone Chemical compound OC1=CC=C(O)C=C1.C1=CC(F)=CC=C1C(=O)C1=CC=C(F)C=C1 JUPQTSLXMOCDHR-UHFFFAOYSA-N 0.000 claims description 4
- 229920002530 polyetherether ketone Polymers 0.000 claims description 4
- 229910010293 ceramic material Inorganic materials 0.000 claims description 3
- 230000005611 electricity Effects 0.000 claims description 2
- 239000004519 grease Substances 0.000 description 6
- 230000001050 lubricating effect Effects 0.000 description 5
- 238000003754 machining Methods 0.000 description 4
- 238000005299 abrasion Methods 0.000 description 3
- 238000005461 lubrication Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 238000001513 hot isostatic pressing Methods 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Landscapes
- Rolling Contact Bearings (AREA)
Abstract
A bearing for a high-speed motorized spindle relates to a bearing. The problem that the capability of the high-speed movement requirement of an electric spindle cannot be met because the existing deep groove ball bearing is difficult to bear large axial force is solved. The utility model comprises a bearing inner ring, a retainer, a bearing outer ring and rolling bodies arranged on the retainer, wherein a sealing ring is arranged between the bearing inner ring and the bearing outer ring, and the two sealing rings and the bearing inner ring are in non-contact design; the top and the bottom of the bearing outer ring are respectively provided with an annular mounting groove for mounting a sealing ring, a first annular rolling groove is arranged at the middle position of the bearing outer ring, the outer side of a rolling body is embedded into the first annular rolling groove, and a contact angle of 15 degrees is formed between the rolling body and the first annular rolling groove; the middle position of the bearing inner ring is provided with a second annular rolling groove, the inner side of the rolling body is embedded into the second annular rolling groove, and a contact angle of 15 degrees is formed between the inner side of the rolling body and the second annular rolling groove. The utility model is mainly used for supporting and rotating the motorized spindle.
Description
Technical Field
The utility model relates to a bearing, in particular to a bearing for a high-speed motorized spindle.
Background
The electric spindle is a heart component of a high-speed numerical control machine tool. The high-speed machining can not only greatly improve the machining efficiency, but also remarkably improve the machining quality of the workpiece, so that the high-speed machining device has a very wide application field, and is particularly used in the manufacturing industries of aerospace, automobiles, molds and the like. Thus, a numerical control machine tool having a high-speed processing capability has become a new market. Currently, various well-known machine tool manufacturers at home and abroad widely adopt an electric spindle structure in a high-speed numerical control machine tool, in particular to a composite machine tool, a multi-axis linkage, a polyhedral machine tool and a parallel machine tool. The electric spindle performance index directly determines the level of the machine tool, which is the precondition and basic condition for the machine tool to realize high-speed processing.
The existing deep groove ball bearing can bear larger radial force generally, but is difficult to bear larger axial force, and the performance index of the electric main shaft is directly affected, so that the capacity of the electric main shaft for meeting the high-speed movement requirement of the electric main shaft cannot be met.
Disclosure of Invention
The utility model aims to solve the problem that the existing deep groove ball bearing can bear larger radial force generally, but is difficult to bear larger axial force, and the performance index of an electric spindle is directly influenced, so that the electric spindle cannot meet the high-speed motion requirement of the electric spindle, and further provides a bearing for the high-speed electric spindle.
The utility model adopts the technical scheme for solving the technical problems that:
the utility model provides a high-speed electricity is bearing for main shaft which characterized in that: the bearing comprises a bearing inner ring, a retainer and a bearing outer ring which are coaxially arranged in sequence from inside to outside, and a plurality of rolling bodies which are arranged on the retainer along the circumferential direction of the retainer, wherein a sealing ring is respectively arranged between the bearing inner ring and the bearing outer ring and at the top and the bottom of the retainer, and the two sealing rings and the bearing inner ring are in non-contact design;
the top and the bottom of the inner circumferential wall of the bearing outer ring are respectively provided with an annular mounting groove for mounting a sealing ring, the middle position of the inner circumferential wall of the bearing outer ring is provided with a first annular rolling groove, the outer side of the rolling body is embedded into the first annular rolling groove, and a contact angle of 15 degrees is formed between the rolling body and the first annular rolling groove; the middle position of the outer circumferential wall of the bearing inner ring is provided with a second annular rolling groove, and the inner side of the rolling body is embedded into the second annular rolling groove and has a contact angle of 15 degrees with the second annular rolling groove.
Further, the upper end of the retainer expands outwards and is matched with the inner diameter of the bearing outer ring; the retainer is provided with a plurality of through holes along the circumferential direction, each through hole is internally provided with a rolling body, and a spacing belt is arranged between two adjacent through holes and used for keeping the positions of the rolling bodies.
Furthermore, the retainer is made of PEEK.
Further, the sealing ring comprises an inner rubber sealing ring and an outer rubber sealing ring, wherein the inner rubber sealing ring is arranged in the outer rubber sealing ring and faces the retainer, and an annular pin is arranged on the outer annular wall of the outer rubber sealing ring along the circumferential direction and is inserted into an annular mounting groove of the bearing outer ring; an annular tooth opening is formed in the inner annular wall of the sealing ring along the circumferential direction, and a gap is formed between the annular tooth opening and the outer annular wall of the bearing inner ring.
Furthermore, the sealing ring is made of nitrile rubber.
Further, the rolling bodies are made of ceramic materials.
Compared with the prior art, the utility model has the beneficial effects that:
1. in the utility model, the bearing outer ring adopts a larger groove curvature and the retainer extends outwards, so that friction between the rolling body and the bearing outer ring channel is reduced, and the high rotation speed of the bearing is enhanced; the sealing ring adopts a tooth mouth non-contact sealing design, so that a closed space is formed in the bearing, external interference is prevented, the bearing rotation speed is not interfered, the non-contact sealing element is used, the speed is not required to be reduced, and the temperature resistance of the sealing element can reach 120 ℃; the design of the 15-degree contact angle of the bearing outer ring, the bearing inner ring and the rolling bodies can enable the bearing to bear larger radial and axial loads.
2. The army bearing steel ferrule, the hot isostatic pressing ceramic balls, the PEEK material retainer, the nitrile rubber sealing ring and the high-low temperature lubricating grease are adopted in the utility model, so that the effects of wear resistance, heat resistance, high rotating speed, high precision and low noise can be realized, and the service life of the bearing is several times that of the traditional bearing.
Drawings
The accompanying drawings are included to provide a further understanding of the utility model, and are incorporated in and constitute a part of this application.
Fig. 1 is a schematic diagram of the overall structure of the present utility model.
Fig. 2 is a schematic structural view of the bearing outer ring.
Fig. 3 is a schematic structural view of the seal ring.
Fig. 4 is a schematic structural view of the inner rubber seal ring.
Fig. 5 is a side cross-sectional view of the cage.
Fig. 6 is a top view of the cage.
Fig. 7 is a schematic view of the structure of the bearing inner race.
Reference numerals illustrate: 1-a bearing inner ring; 1-1-a second annular rolling groove; 2-a retainer; 2-1-through holes; 2-2-spacer tape; 3-bearing outer ring; 3-1-annular mounting grooves; 3-2-a first annular rolling groove; 4-rolling elements; 5-a sealing ring; 5-1-inner rubber sealing rings; 5-2-outer rubber sealing rings; 5-3-annular pins; 5-4-annular tooth mouth.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions in the embodiments will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present utility model, and the following embodiments are used to illustrate the present utility model, but are not intended to limit the scope of the present utility model.
Referring to fig. 1, the embodiment of the application provides a bearing for a high-speed motorized spindle, which comprises a bearing inner ring 1, a retainer 2 and a bearing outer ring 3 which are coaxially arranged in sequence from inside to outside, and a plurality of rolling bodies 4 which are arranged on the retainer 2 along the circumferential direction of the retainer 2, wherein a sealing ring 5 is respectively arranged between the bearing inner ring 1 and the bearing outer ring 3 and at the top and the bottom of the retainer 2, so that a closed space is formed in the bearing, and the two sealing rings 5 and the bearing inner ring 1 are in a non-contact design, so that the bearing rotation speed is not interfered while the external interference is prevented;
the top and the bottom of the inner circumferential wall of the bearing outer ring 3 are respectively provided with an annular mounting groove 3-1 for mounting a sealing ring 5, a first annular rolling groove 3-2 with a large groove curvature is formed in the middle position of the inner circumferential wall of the bearing outer ring 3, the outer side of the rolling body 4 is embedded into the first annular rolling groove 3-2, and a contact angle of 15 degrees is formed between the rolling body 4 and the first annular rolling groove 3-2; the middle position of the outer circumferential wall of the bearing inner ring 1 is provided with a second annular rolling groove 1-1, and the inner side of the rolling body 4 is embedded into the second annular rolling groove 1-1 and has a contact angle of 15 degrees with the second annular rolling groove 1-1.
In this embodiment, the bearing outer ring 3 adopts a larger curvature of the groove and the retainer 2 extends outwards, so that friction between the rolling elements 4 and the groove of the bearing outer ring 3 is reduced and high rotation speed of the bearing is enhanced; the sealing ring adopts a tooth mouth non-contact sealing design, so that a closed space is formed in the bearing, external interference is prevented, the bearing rotation speed is not interfered, the non-contact sealing element is used, the speed is not required to be reduced, and the temperature resistance of the sealing element can reach 120 ℃; the design of the 15-degree contact angle of the bearing outer ring, the bearing inner ring and the rolling bodies can enable the bearing to bear larger radial and axial loads.
In this embodiment, the inner ring 1 and the outer ring 3 are made of army steel, and have high compressive strength and fatigue limit, high hardness, high wear resistance, certain toughness, and good hardenability.
In the embodiment, high-low temperature lubricating grease is adopted in the bearing, and the high-low temperature lubricating grease has excellent high-low temperature performance, high dropping point, low evaporation loss, excellent lubricating performance, mechanical stability and colloid stability, excellent water spray resistance and water flushing resistance, excellent anti-rust and anti-corrosion protection, excellent oxidation resistance and abrasion resistance and extremely long service life of the bearing at high temperature.
Referring to fig. 1, the upper end of the cage 2 is outwardly expanded and matched with the inner diameter of the bearing outer race 3; the retainer 2 is provided with a plurality of through holes 2-1 along the circumferential direction, each through hole 2-1 is internally provided with a rolling body 4, and a spacing belt 2-2 is arranged between two adjacent through holes 2-1 and used for maintaining the positions of the rolling bodies 4 so as to ensure the high-speed rotation of the rolling bodies 4.
In this embodiment, the retainer 2 is made of PEEK, has the effects of low torque and low temperature rise, allows the bearing to operate at a temperature of 250 degrees, guides the outer ring of the retainer, performs injection molding, optimizes the retainer for grease lubrication, and can realize excellent durability under the grease lubrication condition by sealing the bearing and the open bearing, reduce vibration of the retainer, and has excellent mechanical, chemical and thermal stability.
The cage 2 has the characteristics of high abrasion resistance, excellent mixing and abrasion reduction, can still be carried out under severe conditions, brings more low operating temperature due to low friction, stores lubricating grease formed in the pockets, continuously provides lubrication, and has long service life.
Referring to fig. 1, the seal ring 5 is an annular nitrile rubber seal ring, and comprises an inner rubber seal ring 5-1 and an outer rubber seal ring 5-2, wherein the inner rubber seal ring 5-1 is arranged in the outer rubber seal ring 5-2 and faces the retainer 2, an annular pin 5-3 is arranged on the outer annular wall of the outer rubber seal ring 5-2 along the circumferential direction and is inserted into an annular mounting groove 3-1 of the bearing outer ring 3; an annular tooth opening 5-4 is formed in the inner annular wall of the sealing ring 5 along the circumferential direction, and a certain gap is formed between the annular tooth opening and the outer annular wall of the bearing inner ring 1.
The rolling element 4 is made of ceramic material, has the characteristics of high temperature resistance, wear resistance, light weight, small thermal expansion and good insulativity, and has a very wide application range.
Although the utility model herein has been described with reference to particular embodiments, it is to be understood that these embodiments are merely illustrative of the principles and applications of the present utility model. It is therefore to be understood that numerous modifications may be made to the illustrative embodiments and that other arrangements may be devised without departing from the spirit and scope of the present utility model as defined by the appended claims. It should be understood that the different dependent claims and the features described herein may be combined in ways other than as described in the original claims. It is also to be understood that features described in connection with separate embodiments may be used in other described embodiments.
Claims (6)
1. The utility model provides a high-speed electricity is bearing for main shaft which characterized in that: the bearing comprises a bearing inner ring (1), a retainer (2) and a bearing outer ring (3) which are coaxially arranged in sequence from inside to outside, and a plurality of rolling bodies (4) which are arranged on the retainer (2) along the circumferential direction of the retainer (2), wherein a sealing ring (5) is respectively arranged between the bearing inner ring (1) and the bearing outer ring (3) and at the top and the bottom of the retainer (2), and the two sealing rings (5) and the bearing inner ring (1) are in a non-contact design;
the top and the bottom of the inner circumferential wall of the bearing outer ring (3) are respectively provided with an annular mounting groove (3-1) for mounting a sealing ring (5), a first annular rolling groove (3-2) is arranged at the middle position of the inner circumferential wall of the bearing outer ring (3), the outer side of the rolling body (4) is embedded into the first annular rolling groove (3-2), and a contact angle of 15 degrees is formed between the rolling body and the first annular rolling groove (3-2); the bearing is characterized in that a second annular rolling groove (1-1) is formed in the middle of the outer circumferential wall of the bearing inner ring (1), the inner side of the rolling body (4) is embedded into the second annular rolling groove (1-1), and a contact angle of 15 degrees is formed between the inner side of the rolling body and the second annular rolling groove (1-1).
2. The bearing for a high-speed motorized spindle according to claim 1, wherein: the upper end of the retainer (2) expands outwards and is matched with the inner diameter of the bearing outer ring (3); a plurality of through holes (2-1) are formed in the retainer (2) along the circumferential direction, a rolling body (4) is arranged in each through hole (2-1), and a spacing belt (2-2) is arranged between two adjacent through holes (2-1) and used for keeping the positions of the rolling bodies (4).
3. The bearing for a high-speed motorized spindle according to claim 1, wherein: the retainer (2) is made of PEEK.
4. The bearing for a high-speed motorized spindle according to claim 1, wherein: the sealing ring (5) comprises an inner rubber sealing ring (5-1) and an outer rubber sealing ring (5-2), wherein the inner rubber sealing ring (5-1) is arranged in the outer rubber sealing ring (5-2) and faces the retainer (2), an annular pin (5-3) is arranged on the outer annular wall of the outer rubber sealing ring (5-2) along the circumferential direction and is inserted into an annular mounting groove (3-1) of the bearing outer ring (3); an annular tooth opening (5-4) is formed in the inner annular wall of the sealing ring (5) along the circumferential direction, and a gap is formed between the annular tooth opening and the outer annular wall of the bearing inner ring (1).
5. The bearing for a high-speed motorized spindle according to claim 1, wherein: the sealing ring (5) is made of nitrile rubber.
6. The bearing for a high-speed motorized spindle according to claim 1, wherein: the rolling bodies (4) are made of ceramic materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322133310.8U CN220337279U (en) | 2023-08-09 | 2023-08-09 | Bearing for high-speed motorized spindle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322133310.8U CN220337279U (en) | 2023-08-09 | 2023-08-09 | Bearing for high-speed motorized spindle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220337279U true CN220337279U (en) | 2024-01-12 |
Family
ID=89443063
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322133310.8U Active CN220337279U (en) | 2023-08-09 | 2023-08-09 | Bearing for high-speed motorized spindle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220337279U (en) |
-
2023
- 2023-08-09 CN CN202322133310.8U patent/CN220337279U/en active Active
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