CN112664545A - High-precision rotating shaft structure - Google Patents
High-precision rotating shaft structure Download PDFInfo
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- CN112664545A CN112664545A CN202011414510.5A CN202011414510A CN112664545A CN 112664545 A CN112664545 A CN 112664545A CN 202011414510 A CN202011414510 A CN 202011414510A CN 112664545 A CN112664545 A CN 112664545A
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- rotating shaft
- bearing
- base
- circle surface
- distance
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- 239000000463 material Substances 0.000 claims abstract description 12
- 229910000838 Al alloy Inorganic materials 0.000 claims description 3
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 230000000903 blocking effect Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
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- Sliding-Contact Bearings (AREA)
Abstract
The invention discloses a high-precision rotating shaft structure. According to the invention, by optimizing the structures of the base and the rotating shaft, the materials of the base and the rotating shaft are the same, the distance between two inner circular surfaces of the base is equal to that between two outer circular surfaces of the rotating shaft, and through reasonable type selection of the bearings, the materials of the two bearings are the same, and the distances between the end surfaces of the two ends of the two bearings are equal, so that the difference value of the variation quantity of the sizes of all components of the rotating shaft system along the axial direction is zero in a high-temperature and low-temperature working range, the clamping stagnation problem of the rotating shaft system is avoided, and the axial clearance between the rotating shaft and the bearings is ensured not to be increased at other temperatures.
Description
Technical Field
The invention relates to the technical field of design of rotating shaft structures, in particular to a high-precision rotating shaft structure.
Background
The typical rotating shaft system mainly comprises a base, a rotating shaft, a bearing pressing ring or a fastener and the like, wherein when the rotating shaft and the bearing work, because the linear expansion coefficients of all component parts of the rotating shaft system are different, the variation of the sizes of all component parts of the rotating shaft system along the axial direction is unequal under the high and low full-temperature working ranges, the axial gap between the rotating shaft and the bearing is increased or decreased along with the temperature change, in order to prevent the rotating shaft system from being blocked or even dead, the axial gap between the rotating shaft and the bearing is usually adjusted, so that the blocking is not generated under the limit temperature under the high and low full-temperature working ranges, the axial gap between the rotating shaft and the bearing can be increased at other temperatures, and the axial gap between the rotating shaft and the bearing directly influences the axial displacement and the radial oscillation of the rotating shaft system, thereby influencing the rotating precision of the.
Disclosure of Invention
In view of this, the present invention provides a high-precision rotating shaft structure, which can ensure that no clamping stagnation occurs at the limit temperature in the full-temperature working range, and the rotation precision in the full-temperature working range is high.
The high-precision rotating shaft structure of the invention comprises: the bearing comprises a base, a bearing I, a bearing II and a rotating shaft; wherein, the base has a big inner circle surface and a small inner circle surface, and the rotating shaft has a big outer circle surface and a small outer circle surface; the distance between the two inner circular surfaces of the base is equal to the distance between the two outer circular surfaces of the rotating shaft; the outer circle surface of the bearing I is in clearance fit with the large inner circle surface of the base, and the inner circle surface of the bearing I is in clearance fit with the large outer circle surface of the rotating shaft; the two outer circular surfaces of the bearing are in interference fit with the small inner circular surface of the base, and the two inner circular surfaces of the bearing are in clearance fit with the small outer circular surface of the rotating shaft.
Preferably, an outer ring of the bearing is fixed on the base by screws.
Preferably, the distance between the first two end faces of the bearing is equal to the distance between the second two end faces of the bearing.
Preferably, the base and the rotating shaft are made of the same material, and the bearing I and the bearing II are made of the same material.
Preferably, the base and the rotating shaft are made of aluminum alloy, and the first bearing and the second bearing are made of bearing steel.
Has the advantages that:
(1) the structure of the base and the rotating shaft is optimized, and the difference value of the variation quantity of the sizes of all the components of the rotating shaft system along the axial direction is zero in the high-low full-temperature working range through reasonable type selection of the bearing.
(2) The problem of clamping stagnation of the rotary shaft system is avoided, and meanwhile, the axial clearance between the rotary shaft and the bearing is not increased at other temperatures, so that the rotary precision of the rotary shaft system is improved.
Drawings
FIG. 1 is a schematic view of a high-precision spindle according to the present invention.
The bearing comprises a base 1, a bearing I2, a bearing II 3, a rotating shaft 4, a screw I5 and a screw II 6.
Detailed Description
The invention is described in detail below by way of example with reference to the accompanying drawings.
The invention provides a high-precision rotating shaft structure, which comprises a base 1, a bearing I2, a bearing II 3, a rotating shaft 4, a screw I5 and a screw II 6, wherein the base 1 and the rotating shaft 4 are made of the same material, and an aluminum alloy is selected in the embodiment; the first bearing 2 and the second bearing 3 are made of the same material, and bearing steel is selected in the embodiment. The base 1 is provided with a large inner circular surface and a small inner circular surface, the large inner circular surface is coaxial with the small inner circular surface, the diameter of the large inner circular surface is larger than that of the small inner circular surface, the end surface of the large inner circular surface of the base 1 is parallel to that of the small inner circular surface, and the distance between the end surface of the large inner circular surface of the base 1 and the end surface of the small inner circular surface is L1; the outer circle surface of the bearing I2 is in clearance fit with the large inner circle surface of the base 1, the outer circle of the bearing I2 is fixed on the base 1 through a screw I5, and the end surface of one side of the bearing I2 is close to the end surface of the large inner circle surface of the base 1; the outer circle surface of the bearing II 3 is in interference fit with the small inner circle surface of the base 1, and the end surface of one side of the bearing II 3 is close to the end surface of the small inner circle surface of the base 1; the rotating shaft 4 is provided with two large outer circular surfaces, one small outer circular surface and one large outer circular surface, the large outer circular surface and the small outer circular surface are coaxial, the diameter of the large outer circular surface is larger than that of the small outer circular surface, the end face of the large outer circular surface of the rotating shaft 4 is parallel to that of the small outer circular surface, the distance between the end face of the large outer circular surface of the rotating shaft and the end face of the small outer circular surface is L3; the inner circle surface of the first bearing 2 is in clearance fit with the large inner circle surface of the rotating shaft 4, the inner circle of the first bearing 2 is fixed on the rotating shaft 4 through the second screw 6, the end surface of the other side of the first bearing 2 is close to the end surface of the large outer circle surface of the rotating shaft 4, the end surfaces of the two sides of the first bearing 2 are parallel and have a distance of L2, the inner circle surface of the second bearing 3 is in clearance fit with the small inner circle surface of the rotating shaft 4, the end surface of the other side of the second bearing 3 is close to the end surface of the small outer circle surface of the rotating shaft 4, the end surfaces of the two sides of the second bearing 3 are parallel and have a distance.
According to the invention, by optimizing the structures of the base and the rotating shaft, the materials of the base and the rotating shaft are the same, the distance between two inner circular surfaces of the base is equal to that between two outer circular surfaces of the rotating shaft, and through reasonable type selection of the bearings, the materials of the two bearings are the same, and the distances between the end surfaces of the two ends of the two bearings are equal, so that the difference value of the variation quantity of the sizes of all components of the rotating shaft system along the axial direction is zero in a high-temperature and low-temperature working range, the clamping stagnation problem of the rotating shaft system is avoided, and the axial clearance between the rotating shaft and the bearings is ensured not to be increased at other temperatures.
In summary, the above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (5)
1. A high accuracy pivot structure, its characterized in that includes: the bearing comprises a base (1), a bearing I (2), a bearing II (3) and a rotating shaft (4); wherein, the base (1) is provided with a big inner circle surface and a small inner circle surface, and the rotating shaft (4) is provided with a big outer circle surface and a small outer circle surface; the distance between the two inner circular surfaces of the base (1) is equal to the distance between the two outer circular surfaces of the rotating shaft (4); the outer circular surface of the bearing I (2) is in clearance fit with the large inner circular surface of the base (1), and the inner circular surface of the bearing I (2) is in clearance fit with the large outer circular surface of the rotating shaft (4); the outer circle surface of the second bearing (3) is installed in interference fit with the small inner circle surface of the base (1), and the inner circle surface of the second bearing (3) is installed in clearance fit with the small outer circle surface of the rotating shaft (4).
2. A high-precision rotary shaft structure according to claim 1, wherein the outer ring of the first bearing (2) is fixed on the base (1) by screws.
3. A high-precision rotary shaft structure according to claim 1, wherein the distance between the two end faces of the first bearing (2) is equal to the distance between the two end faces of the second bearing (3).
4. A high-precision rotary shaft structure according to claim 1, wherein the base (1) and the rotary shaft (4) are made of the same material, and the bearing one (2) and the bearing two (3) are made of the same material.
5. A high-precision rotating shaft structure according to claim 4, wherein the materials of the base (1) and the rotating shaft (4) are aluminum alloy, and the materials of the bearing I (2) and the bearing II (3) are bearing steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011414510.5A CN112664545A (en) | 2020-12-07 | 2020-12-07 | High-precision rotating shaft structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011414510.5A CN112664545A (en) | 2020-12-07 | 2020-12-07 | High-precision rotating shaft structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112664545A true CN112664545A (en) | 2021-04-16 |
Family
ID=75401288
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011414510.5A Pending CN112664545A (en) | 2020-12-07 | 2020-12-07 | High-precision rotating shaft structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112664545A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101761584A (en) * | 2010-02-08 | 2010-06-30 | 成都科华重型轴承有限公司 | High rigidity installation method of rolling bearing and novel structure of bearing |
| CN105135109A (en) * | 2015-07-17 | 2015-12-09 | 南车戚墅堰机车车辆工艺研究所有限公司 | Swivel joint |
| CN110821966A (en) * | 2019-11-26 | 2020-02-21 | 成都国翼电子技术有限公司 | Axial clearance adjusting device |
| CN111022490A (en) * | 2019-11-25 | 2020-04-17 | 天津津航技术物理研究所 | Bearing for increasing shafting rigidity based on high-precision rotary table |
| CN211501248U (en) * | 2019-12-24 | 2020-09-15 | 深圳怡化电脑股份有限公司 | Improve transmission assembly and self-service financial equipment of axial float |
-
2020
- 2020-12-07 CN CN202011414510.5A patent/CN112664545A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101761584A (en) * | 2010-02-08 | 2010-06-30 | 成都科华重型轴承有限公司 | High rigidity installation method of rolling bearing and novel structure of bearing |
| CN105135109A (en) * | 2015-07-17 | 2015-12-09 | 南车戚墅堰机车车辆工艺研究所有限公司 | Swivel joint |
| CN111022490A (en) * | 2019-11-25 | 2020-04-17 | 天津津航技术物理研究所 | Bearing for increasing shafting rigidity based on high-precision rotary table |
| CN110821966A (en) * | 2019-11-26 | 2020-02-21 | 成都国翼电子技术有限公司 | Axial clearance adjusting device |
| CN211501248U (en) * | 2019-12-24 | 2020-09-15 | 深圳怡化电脑股份有限公司 | Improve transmission assembly and self-service financial equipment of axial float |
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| PB01 | Publication | ||
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| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210416 |
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| RJ01 | Rejection of invention patent application after publication |