CN111022490A - Bearing for increasing shafting rigidity based on high-precision rotary table - Google Patents
Bearing for increasing shafting rigidity based on high-precision rotary table Download PDFInfo
- Publication number
- CN111022490A CN111022490A CN201911165672.7A CN201911165672A CN111022490A CN 111022490 A CN111022490 A CN 111022490A CN 201911165672 A CN201911165672 A CN 201911165672A CN 111022490 A CN111022490 A CN 111022490A
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- Prior art keywords
- bearing
- sleeve
- end bearing
- rotating shaft
- ring
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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
- F16C19/00—Bearings with rolling contact, for exclusively rotary movement
- F16C19/54—Systems consisting of a plurality of bearings with rolling friction
- F16C19/541—Systems consisting of juxtaposed rolling bearings including at least one angular contact bearing
- F16C19/542—Systems consisting of juxtaposed rolling bearings including at least one angular contact bearing with two rolling bearings with angular contact
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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
- F16C19/00—Bearings with rolling contact, for exclusively rotary movement
- F16C19/54—Systems consisting of a plurality of bearings with rolling friction
- F16C19/546—Systems with spaced apart rolling bearings including at least one angular contact bearing
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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
- F16C35/00—Rigid support of bearing units; Housings, e.g. caps, covers
- F16C35/04—Rigid support of bearing units; Housings, e.g. caps, covers in the case of ball or roller bearings
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mounting Of Bearings Or Others (AREA)
- Motor Or Generator Frames (AREA)
Abstract
The invention relates to a bearing structure for increasing shafting rigidity based on a high-precision turntable, which comprises: the upper end bearing block is fixed with the motor base, the first bearing and the second bearing are arranged on the bearing upper sleeve in a back-to-back grouping mode, the bearing outer pressing ring is connected and arranged through bolts, the rotating shaft is inserted into the third bearing inner ring, the bearing is pre-tightened by the bearing inner pressing ring, and the motor stator and the motor rotor are respectively arranged on the motor base and the rotating shaft and are fixed by bolts; the lower end bearing block and the lower end bearing sleeve are fixedly arranged on the motor base, the third bearing is arranged between the rotating shaft and the lower end bearing sleeve, the third bearing is in clearance fit with the rotating shaft, the third bearing is also in clearance fit with the lower end bearing sleeve, the inner ring of the third bearing is pressed by the spacer bush, the lower end bearing pressing ring is in threaded connection with the lower end bearing sleeve, the pretightening force of the third bearing is controlled by adjusting the moment of the lower end bearing pressing ring, and the third bearing, the first bearing and the second bearing rotate coaxially under the driving of the motor rotor.
Description
Technical Field
The invention is suitable for the technical field of high-precision turntables. In particular to a bearing for increasing shafting rigidity based on a high-precision turntable.
Background
The requirement of the current market on the rotation precision of a rotary table product is higher and higher, and the shafting rigidity of the rotary table plays a key role in the precision of the rotary table, so that the improvement of the shafting rigidity is necessary. The shafting structure comprises a shaft, bearings and parts on the shaft, wherein the arrangement of the bearings generally adopts a mode of connecting the bearings in series in pairs, in order to increase the shafting rigidity, the method widely applied at present is to install a spacer sleeve between a pair of bearings, and two spacer sleeves are respectively installed between an inner ring and an outer ring of the bearing to increase the span between the two bearings, and the larger the bearing span is, the better the shafting rigidity is. However, in some cases, in order to achieve the required shafting rigidity, the span between the bearings is greatly stretched, so that the rotating shaft is too long, the height of the rotary table is increased, the volume and the mass of the product are increased, the index of a user cannot be met, and the competitiveness of the product is reduced.
Disclosure of Invention
The invention aims to provide a bearing structure for increasing shafting rigidity based on a high-precision turntable, which can solve the problem of volume and mass increase caused by the enhancement of the shafting rigidity of the turntable.
The invention relates to a bearing structure for increasing shafting rigidity based on a high-precision turntable, which comprises: the motor comprises a rotating shaft (1), a bearing upper sleeve (2), an upper end bearing seat (3), a bearing outer pressing ring (4), a motor stator (5), a motor seat (6), a first bearing (7), a second bearing (8), a bearing inner pressing ring (9), a motor rotor (10), a lower end bearing seat (11), a lower end bearing sleeve (12), a third bearing (13), a lower end bearing pressing ring (14) and a spacer bush (15); an upper end bearing seat (3) is fixed with a motor base (6), a first bearing (7) and a second bearing (8) are arranged on a bearing upper sleeve (2) in a back-to-back grouping mode, an outer bearing pressing ring (4) is installed through bolt connection, a rotating shaft (1) is inserted into an inner ring of a third bearing (13), the bearings are pre-tightened by an inner bearing pressing ring (9), and a motor stator (5) and a motor rotor (10) are respectively installed on the motor base (6) and the rotating shaft (1) and are fixed by bolts; the lower end bearing seat (11) and the lower end bearing sleeve (12) are installed and fixed on a motor base, the third bearing (13) is installed between the rotating shaft (1) and the lower end bearing sleeve (12), the third bearing (13) is in clearance fit with the rotating shaft (1), the third bearing (13) is also in clearance fit with the lower end bearing sleeve (12), a spacer bush (15) is used for pressing an inner ring of the third bearing (13), the lower end bearing press ring (14) is in threaded connection with the lower end bearing sleeve (12), the pretightening force of the third bearing (13) is controlled by adjusting the moment of the lower end bearing press ring (14), and the third bearing (13), the first bearing (7) and the second bearing (8) rotate coaxially under the driving of the motor rotor (10).
According to the embodiment of the bearing structure for increasing the shafting rigidity based on the high-precision turntable, the inner ring of the upper bearing sleeve is processed by taking the outer ring of the bearing seat as a reference, and the inner ring is ensured to be coaxial with the outer ring of the upper end bearing seat (3) and simultaneously to be in line with the first bearing and the second bearing in clearance fit precision.
According to one embodiment of the structure of the bearing for increasing the shafting rigidity based on the high-precision turntable, a motor base is fixed on an upper end bearing seat (3) and a lower end bearing seat (11) through screws.
According to one embodiment of the structure of the bearing for increasing shafting rigidity based on the high-precision rotary table, the lower end bearing seat and the lower end bearing sleeve are bonded together by using mechanical high-strength glue.
According to an embodiment of the bearing structure for increasing shafting rigidity based on the high-precision turntable, the gap between the third bearing and the rotating shaft is 0.01 mm.
According to one embodiment of the structure of the bearing for increasing the shafting rigidity based on the high-precision turntable, the gap between the third bearing and the lower end bearing sleeve is 0.01 mm.
According to one embodiment of the structure of the bearing for increasing shafting rigidity based on the high-precision turntable, the pre-tightening amount is 0.008 mm.
The invention provides a novel bearing arrangement method for increasing shafting rigidity based on a high-precision rotary table, which can realize that the shafting rigidity is obviously improved and the mass and the volume of the rotary table are basically unchanged.
Drawings
FIG. 1 is a schematic diagram of a novel bearing arrangement method.
Reference numerals
The bearing comprises a rotating shaft (1), a bearing upper sleeve (2), a bearing seat (3), a bearing outer pressing ring (4), a motor stator (5), a motor base (6), a first bearing (7), a second bearing (8), a bearing inner pressing ring (9), a motor rotor (10), a lower end bearing seat (11), a lower end bearing sleeve (12), a third bearing (13), a lower end bearing pressing ring (14) and a spacer bush (15).
Detailed Description
In order to make the objects, contents, and advantages of the present invention clearer, the following detailed description of the embodiments of the present invention will be made in conjunction with the accompanying drawings and examples.
Fig. 1 is a structural schematic diagram of a bearing of increase shafting rigidity based on high accuracy revolving stage, as shown in fig. 1, the bearing of increase shafting rigidity based on high accuracy revolving stage includes pivot (1), bearing upper shield (2), bearing frame (3), bearing outer clamping ring (4), motor stator (5), motor cabinet (6), first bearing (7), second bearing (8), bearing inner clamping ring (9), electric motor rotor (10), lower extreme bearing frame (11), lower extreme bearing housing (12), third bearing (13), lower extreme bearing clamping ring (14), spacer sleeve (15).
As shown in fig. 1, the structure of the bearing for increasing shafting rigidity based on the high-precision turntable is specifically as follows: firstly, fixing a bearing upper sleeve (2) together with a bearing seat (3) through a screw, processing an inner ring of the bearing upper sleeve (2) by taking an outer ring of the bearing seat (3) as a reference, ensuring that the inner ring and the outer ring of the bearing seat (3) are coaxial and simultaneously enabling the inner ring and a first bearing (7) to be matched with each other, and enabling a second bearing (8) to accord with clearance fit precision; fixing a motor base (6) on a bearing seat (3) through screws, adhering a lower end bearing seat (11) and a lower end bearing sleeve (12) together by using mechanical high-strength glue, fixing the glue on the motor base (6) through the screws after the glue is condensed, and then processing an inner ring of the lower end bearing sleeve (12) by using an outer ring of the bearing seat (3) as a reference, so that the inner ring and the outer ring of the bearing seat (3) are coaxial and simultaneously conform to the clearance fit precision with a third bearing (13); the bearing assembling method comprises the following steps of sequentially dismounting a lower end bearing sleeve (12), a lower end bearing seat (11), a motor seat (6), an outer bearing pressing ring (4) and an inner bearing pressing ring (9), then starting to assemble a shafting, mounting a pair of bearings (a first bearing (7) and a second bearing (8)) on a bearing upper sleeve (2) in a back-to-back grouping mode, then mounting the outer bearing pressing ring (4) through bolt connection, inserting a rotating shaft (1) into a bearing inner ring, and pre-tightening the bearings through the inner bearing pressing ring (9). Then the motor stator and the rotor are respectively arranged on the motor base (6) and the rotating shaft (1) and fixed by bolts. Then, a lower end bearing seat (11), a lower end bearing sleeve (12) is installed and fixed on a motor base, then a third bearing (13) is installed between a rotating shaft (1) and the lower end bearing sleeve (12), the narrow surface is upward, the wide surface is downward, the third bearing (13) and the rotating shaft (1) are in clearance fit, the clearance amount is 0.01mm, the third bearing is also in clearance fit with the lower end bearing sleeve (12), the clearance amount is 0.01mm, a spacer sleeve (15) is used for pressing an inner ring of the third bearing (13), a threaded connection mode is adopted between a lower end bearing press ring (14) and the lower end bearing sleeve (12), the pre-tightening force of the third bearing (13) is controlled by adjusting the moment of the lower end bearing press ring (14), the moderate pre-tightening amount is 0.008mm, and the third bearing (13) and a pair of bearings (a first bearing (7) and a second bearing (8)) rotate coaxially under the drive of a motor rotor (10), the distance of bearing points of the bearing is lengthened, the rigidity and the rotation precision of the bearing are guaranteed, and the third bearing (13) mainly bears axial load and a small amount of radial load in the moving process.
The invention adopts a pair of angular contact bearings and a single angular contact bearing to be used in a group, the pair of angular contact bearings are arranged at one end of the rotating shaft, the single angular contact bearing is arranged at the other end of the rotating shaft, the bearings at the upper end and the lower end of the shafting are ensured to be coaxial through combined processing, and the motor is arranged in the middle, thereby realizing the purposes of increasing the bearing span and increasing the shafting rigidity. The invention solves the problems that the shaft system rigidity is increased, so that the rotating shaft is too long, the height of the rotating platform is increased, and the volume and the quality of a product are increased. The invention is suitable for the technical field of high-precision turntables. In particular to a high-precision shafting bearing arrangement structure and a method.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (7)
1. The utility model provides a structure of bearing of increase shafting rigidity based on high accuracy revolving stage which characterized in that includes: the motor comprises a rotating shaft (1), a bearing upper sleeve (2), an upper end bearing seat (3), a bearing outer pressing ring (4), a motor stator (5), a motor seat (6), a first bearing (7), a second bearing (8), a bearing inner pressing ring (9), a motor rotor (10), a lower end bearing seat (11), a lower end bearing sleeve (12), a third bearing (13), a lower end bearing pressing ring (14) and a spacer bush (15);
an upper end bearing seat (3) is fixed with a motor base (6), a first bearing (7) and a second bearing (8) are arranged on a bearing upper sleeve (2) in a back-to-back grouping mode, an outer bearing pressing ring (4) is installed through bolt connection, a rotating shaft (1) is inserted into an inner ring of a third bearing (13), the bearings are pre-tightened by an inner bearing pressing ring (9), and a motor stator (5) and a motor rotor (10) are respectively installed on the motor base (6) and the rotating shaft (1) and are fixed by bolts; the lower end bearing seat (11) and the lower end bearing sleeve (12) are installed and fixed on a motor base, the third bearing (13) is installed between the rotating shaft (1) and the lower end bearing sleeve (12), the third bearing (13) is in clearance fit with the rotating shaft (1), the third bearing (13) is also in clearance fit with the lower end bearing sleeve (12), a spacer bush (15) is used for pressing an inner ring of the third bearing (13), the lower end bearing press ring (14) is in threaded connection with the lower end bearing sleeve (12), the pretightening force of the third bearing (13) is controlled by adjusting the moment of the lower end bearing press ring (14), and the third bearing (13), the first bearing (7) and the second bearing (8) rotate coaxially under the driving of the motor rotor (10).
2. The structure of a bearing for increasing shafting rigidity based on a high-precision turntable as claimed in claim 1, wherein the inner ring of the upper bearing sleeve is processed by taking the outer ring of the bearing seat as a reference, and the inner ring is ensured to be coaxial with the outer ring of the upper end bearing seat (3) and simultaneously to be in accordance with clearance fit precision with the first bearing and the second bearing.
3. The structure of a bearing for increasing shafting rigidity based on a high-precision turntable as claimed in claim 1, wherein the motor base is fixed on the upper end bearing seat (3) and the lower end bearing seat (11) through screws.
4. The structure of a bearing for increasing shafting rigidity based on a high-precision rotary table as claimed in claim 1, wherein the lower end bearing seat and the lower end bearing sleeve are bonded together by using mechanical high-strength glue.
5. The structure of a bearing for increasing shafting rigidity based on a high-precision turntable as claimed in claim 1, wherein the gap between the third bearing and the rotating shaft is 0.01 mm.
6. The structure of a bearing for increasing shafting rigidity based on a high-precision turntable as claimed in claim 1, wherein the gap amount between the third bearing and the lower end bearing sleeve is 0.01 mm.
7. The structure of a bearing for increasing shafting rigidity based on a high-precision turntable as claimed in claim 1, wherein the pre-tightening amount is 0.008 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911165672.7A CN111022490A (en) | 2019-11-25 | 2019-11-25 | Bearing for increasing shafting rigidity based on high-precision rotary table |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911165672.7A CN111022490A (en) | 2019-11-25 | 2019-11-25 | Bearing for increasing shafting rigidity based on high-precision rotary table |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111022490A true CN111022490A (en) | 2020-04-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911165672.7A Pending CN111022490A (en) | 2019-11-25 | 2019-11-25 | Bearing for increasing shafting rigidity based on high-precision rotary table |
Country Status (1)
| Country | Link |
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| CN (1) | CN111022490A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112664545A (en) * | 2020-12-07 | 2021-04-16 | 河北汉光重工有限责任公司 | High-precision rotating shaft structure |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1825293A (en) * | 1926-09-27 | 1931-09-29 | Dodge Mfg Corp | Shaft support |
| GB664920A (en) * | 1949-02-03 | 1952-01-16 | C H Johnson Machinery Ltd | Improvements in shaft bearings |
| CH384025A (en) * | 1962-03-19 | 1964-11-15 | Isothermos Sa | Roller axle box |
| JP2003269448A (en) * | 2002-03-14 | 2003-09-25 | Nsk Ltd | Bearing device |
| US20050146810A1 (en) * | 2000-07-17 | 2005-07-07 | Minebea Co., Ltd. | Pivot assembly |
| CN101480778A (en) * | 2009-01-24 | 2009-07-15 | 苏州江南电梯(集团)有限公司 | Direct driving type accurate turn plate |
| CN101596681A (en) * | 2009-07-03 | 2009-12-09 | 东华大学 | The high-precision rotary working-table that torque motor drives |
| CN102011918A (en) * | 2010-11-04 | 2011-04-13 | 北京卫星制造厂 | High-precision direct driven air flotation turntable |
| CN203993160U (en) * | 2014-08-02 | 2014-12-10 | 成都科华重型轴承有限公司 | For the precision rotating device of jumbo |
| CN105423077A (en) * | 2015-12-15 | 2016-03-23 | 中国科学院西安光学精密机械研究所 | Precise turntable vertical shaft system |
-
2019
- 2019-11-25 CN CN201911165672.7A patent/CN111022490A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1825293A (en) * | 1926-09-27 | 1931-09-29 | Dodge Mfg Corp | Shaft support |
| GB664920A (en) * | 1949-02-03 | 1952-01-16 | C H Johnson Machinery Ltd | Improvements in shaft bearings |
| CH384025A (en) * | 1962-03-19 | 1964-11-15 | Isothermos Sa | Roller axle box |
| US20050146810A1 (en) * | 2000-07-17 | 2005-07-07 | Minebea Co., Ltd. | Pivot assembly |
| JP2003269448A (en) * | 2002-03-14 | 2003-09-25 | Nsk Ltd | Bearing device |
| CN101480778A (en) * | 2009-01-24 | 2009-07-15 | 苏州江南电梯(集团)有限公司 | Direct driving type accurate turn plate |
| CN101596681A (en) * | 2009-07-03 | 2009-12-09 | 东华大学 | The high-precision rotary working-table that torque motor drives |
| CN102011918A (en) * | 2010-11-04 | 2011-04-13 | 北京卫星制造厂 | High-precision direct driven air flotation turntable |
| CN203993160U (en) * | 2014-08-02 | 2014-12-10 | 成都科华重型轴承有限公司 | For the precision rotating device of jumbo |
| CN105423077A (en) * | 2015-12-15 | 2016-03-23 | 中国科学院西安光学精密机械研究所 | Precise turntable vertical shaft system |
Non-Patent Citations (1)
| Title |
|---|
| 毛谦德，李振清: "《袖珍机械设计师手册》", 31 December 2020 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112664545A (en) * | 2020-12-07 | 2021-04-16 | 河北汉光重工有限责任公司 | High-precision rotating shaft structure |
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Application publication date: 20200417 |
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| RJ01 | Rejection of invention patent application after publication |