CN201807744U - Reliable electric spindle constant voltage pre-tightening structure - Google Patents
Reliable electric spindle constant voltage pre-tightening structure Download PDFInfo
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- CN201807744U CN201807744U CN2010205502251U CN201020550225U CN201807744U CN 201807744 U CN201807744 U CN 201807744U CN 2010205502251 U CN2010205502251 U CN 2010205502251U CN 201020550225 U CN201020550225 U CN 201020550225U CN 201807744 U CN201807744 U CN 201807744U
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- level pressure
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Abstract
The utility model relates to a reliable electric spindle constant voltage pre-tightening structure, which comprises a shell body, a rotor shaft and a bearing seat, wherein the rotor shaft is arranged in the bearing seat through a bearing; the bearing seat is arranged in the end of the shell body through a linear bearing; the outside of the end of the bearing seat is sleeved with an adjusting washer; the end of the bearing seat is provided with a spring seat body; parallel and axial spring blind holes are arranged on the inner end surface of the spring seat body along the circumference; springs are arranged in the spring blind holes; the springs are pressed on the adjusting washer; the washer is pressed on the end of the shell body; parallel and axial screw through holes are arranged between both end surfaces of the spring seat body; set screws are arranged in the through holes; the set screws are fixedly pressed on the adjusting washer; and the lengths of the springs which extend outside the spring blind holes are matched with the lengths of the set screws which extend outside the screw through holes. The reliable electric spindle constant voltage pre-tightening structure can prolong the service life of the bearing, reduce the bearing repair and replacement costs, reduce the machining cost of products, improves the processing precision, and is particularly outstanding to parts with strict length requirements.
Description
Technical field
The utility model relates to a kind of machine tool technology field of electronical line shaft, particularly relates to a kind of electric main shaft level pressure pretension reliability structure.
Background technology
Existing electric main shaft adopts the supporting of angular contact ball rolling bearing more, for the running accuracy that improves bearing reduces at a high speed the slip of rolling element down, improve bearing rigidity, reduce the axial and shifting amount radially of supporting, improve the service life of bearing, bearing all will add certain axial load in advance in normal operation, is called pretension.
The pretension of bearing has location pretension and level pressure pretension dual mode.These two kinds of frame modes cut both ways, and the location pretension is in use, and the relative position of parts immobilizes between supporting, this structure can be born bidirectional force, shortcoming is the gap that occurs after the bearing wear, can't compensate, and the element precision that causes electric main shaft to process is poor; The level pressure pretension is to utilize flexible member such as helical spring, makes bearing obtain suitable pretension at the supporting position, and this structural advantages is that the gap that occurs after the bearing wear can compensate, and has improved the service life of bearing, and shortcoming is to bear unidirectional force.
The utility model content
The purpose of this utility model is in order to address the above problem, a kind of electric main shaft level pressure pretension reliability structure to be provided, and this structure can be born bidirectional force, can improve service life again.
The technical solution of the utility model is: a kind of electric main shaft level pressure pretension reliability structure, contain housing, armature spindle, bearing block, armature spindle is installed in the bearing block by bearing, this bearing block is installed in the end of housing by linear bearing, the termination outer cover of described bearing block is equipped with the adjustment packing ring, described bearing block end is equipped with the spring pedestal, this spring pedestal inner face is provided with parallel and axial spring blind hole along circumference, in the spring blind hole, be provided with spring, this spring is pressed on the described adjustment packing ring, this packing ring is pressed in shell end, be provided with parallel and axial screwing through hole between the both ends of the surface of described spring pedestal, be provided with holding screw in this through hole, this holding screw level pressure is on described adjustment packing ring, and described spring stretches out the length of spring blind hole and length that holding screw stretches out screwing through hole coupling.
Holding screw in described each screwing through hole has two, end to end being installed in the screwing through hole.
Described bearing has two, is respectively equipped with two annular dottle pins between two bearings, is supported between the inner ring and outer ring of two bearings; End at armature spindle is provided with nut, and roof pressure is on the inner ring of bearing.
Described spring pedestal is fixedlyed connected with bearing block by screw thread.
In the described housing stator coil is installed, described armature spindle is equipped with rotor coil on one section of enclosure interior.
The beneficial effects of the utility model
1, can prolong the service life of bearing, reduce the expense of maintain and replace bearing, reduce the machining cost of producing product.
2, the raising of machining accuracy, especially, particularly outstanding for the part of length requirement strictness.
Description of drawings
Fig. 1 is the schematic diagram of electric main shaft level pressure pretension reliability structure
Fig. 2 is the structural representation of Fig. 1 medi-spring pedestal
Fig. 3 is the left TV structure schematic diagram of Fig. 2.
The specific embodiment
Referring to Fig. 1-Fig. 3,1. armature spindles among the figure, 2. housing, 3. stator coil, 4. rotor coil, 5. bearing, 6. bearing block, 7. linear bearing, 8. the outer ring dottle pin, 9. in annular dottle pin, 10. adjust packing ring, 11. spring pedestals, 12. nuts, 13. holding screws.
Embodiment: a kind of electric main shaft level pressure pretension reliability structure, contain housing, armature spindle, bearing block, armature spindle is installed in the bearing block by bearing, this bearing block is installed in the end of housing by linear bearing, the termination outer cover of described bearing block is equipped with the adjustment packing ring, described bearing block end is equipped with the spring pedestal, this spring pedestal inner face is provided with parallel and axial spring blind hole along circumference, in the spring blind hole, be provided with spring, this spring is pressed on the described adjustment packing ring, this packing ring is pressed in shell end, be provided with parallel and axial screwing through hole between the both ends of the surface of described spring pedestal, be provided with holding screw in this through hole, this holding screw level pressure is on described adjustment packing ring, and described spring stretches out the length of spring blind hole and length that holding screw stretches out screwing through hole coupling.
Holding screw in described each screwing through hole has two, end to end being installed in the screwing through hole.
Described bearing has two, is respectively equipped with two annular dottle pins between two bearings, is supported between the inner ring and outer ring of two bearings; End at armature spindle is provided with nut, and roof pressure is on the inner ring of bearing.
Described spring pedestal is fixedlyed connected with bearing block by screw thread.
In the described housing stator coil is installed, described armature spindle is equipped with rotor coil on one section of enclosure interior.
Level pressure pretension reliability structure increases axial adjustable non-yielding prop of uniform symmetry in the spring working position on the basis of level pressure pre-pressing structure.The installation of spring relates to two parts, and a part maintains static, and another part floats.One end of non-yielding prop withstands on the corresponding retaining element, plays the role of positioning; The other end links to each other with the part that floats; The exposed length of non-yielding prop equates with the exposed length of spring.When electric main shaft is subjected to opposing force, when spring will be compressed, axial non-yielding prop had born this power, made spring keep original duty, and electric main shaft does not axially have displacement; When electric main shaft after operation a period of time, the gap appears between the steel ball of bearing and the raceway groove, but regulating shaft to the exposed length of non-yielding prop; Like this, electric main shaft can bear bidirectional force, can compensate the gap that occurs behind the bearing operation again.
Present embodiment has increased the uniform screwing through hole of structure on original spring pedestal, inside is equipped with holding screw, and the termination of these several holding screws will withstand on the end face of adjusting packing ring.When the ripe axial tension of electric main shaft is, this pulling force hull bottom of rotating shaft is to bearing, be delivered to spring through bearing again, this moment, spring had compressed trend, above-mentioned like this holding screw just plays spacing effect, supported the gap of adjusting between packing ring and the spring base end face, made spring keep original compressive state, bearing sees that the relative position of a parts remains unchanged; Bearing can produce wearing clearance through after a while running, can eliminate by the gap of adjusting between packing ring and the spring pedestal end face, promptly adjusts the screw-in position of holding screw and eliminates.
Claims (5)
1. electric main shaft level pressure pretension reliability structure, contain housing, armature spindle, bearing block, armature spindle is installed in the bearing block by bearing, this bearing block is installed in the end of housing by linear bearing, the termination outer cover of described bearing block is equipped with the adjustment packing ring, described bearing block end is equipped with the spring pedestal, this spring pedestal inner face is provided with parallel and axial spring blind hole along circumference, in the spring blind hole, be provided with spring, this spring is pressed on the described adjustment packing ring, this packing ring is pressed in shell end, it is characterized in that: be provided with parallel and axial screwing through hole between the both ends of the surface of described spring pedestal, be provided with holding screw in this through hole, this holding screw level pressure is on described adjustment packing ring, and described spring stretches out the length of spring blind hole and length that holding screw stretches out screwing through hole coupling.
2. electric main shaft level pressure pretension reliability structure according to claim 1 is characterized in that: the holding screw in described each screwing through hole has two, end to end being installed in the screwing through hole.
3. electric main shaft level pressure pretension reliability structure according to claim 1, it is characterized in that: described bearing has two, is respectively equipped with two annular dottle pins between two bearings, is supported between the inner ring and outer ring of two bearings; End at armature spindle is provided with nut, and roof pressure is on the inner ring of bearing.
4. electric main shaft level pressure pretension reliability structure according to claim 1, it is characterized in that: described spring pedestal is fixedlyed connected with bearing block by screw thread.
5. electric main shaft level pressure pretension reliability structure according to claim 1 is characterized in that: in the described housing stator coil is installed, described armature spindle is equipped with rotor coil on one section of enclosure interior.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205502251U CN201807744U (en) | 2010-09-30 | 2010-09-30 | Reliable electric spindle constant voltage pre-tightening structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205502251U CN201807744U (en) | 2010-09-30 | 2010-09-30 | Reliable electric spindle constant voltage pre-tightening structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201807744U true CN201807744U (en) | 2011-04-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205502251U Expired - Fee Related CN201807744U (en) | 2010-09-30 | 2010-09-30 | Reliable electric spindle constant voltage pre-tightening structure |
Country Status (1)
| Country | Link |
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| CN (1) | CN201807744U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102717333A (en) * | 2012-06-29 | 2012-10-10 | 无锡机床股份有限公司 | High-speed electric main shaft structure of machine tool |
| CN105014104A (en) * | 2015-06-24 | 2015-11-04 | 上海大学 | External-adjustable constant-pressure pre-tightening device for motorized spindle |
| CN107830065A (en) * | 2017-12-04 | 2018-03-23 | 洛阳理工学院 | Paired thrust ball bearing pre-tightening apparatus |
| CN110732909A (en) * | 2019-10-25 | 2020-01-31 | 珠海格力电器股份有限公司 | Electric spindle bearing pre-tightening device, electric spindle and machine tool |
| CN114087272A (en) * | 2021-11-29 | 2022-02-25 | 中国航发哈尔滨轴承有限公司 | Pre-tightening washer |
-
2010
- 2010-09-30 CN CN2010205502251U patent/CN201807744U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102717333A (en) * | 2012-06-29 | 2012-10-10 | 无锡机床股份有限公司 | High-speed electric main shaft structure of machine tool |
| CN102717333B (en) * | 2012-06-29 | 2014-06-25 | 无锡机床股份有限公司 | High-speed electric main shaft structure of machine tool |
| CN105014104A (en) * | 2015-06-24 | 2015-11-04 | 上海大学 | External-adjustable constant-pressure pre-tightening device for motorized spindle |
| CN107830065A (en) * | 2017-12-04 | 2018-03-23 | 洛阳理工学院 | Paired thrust ball bearing pre-tightening apparatus |
| CN110732909A (en) * | 2019-10-25 | 2020-01-31 | 珠海格力电器股份有限公司 | Electric spindle bearing pre-tightening device, electric spindle and machine tool |
| CN114087272A (en) * | 2021-11-29 | 2022-02-25 | 中国航发哈尔滨轴承有限公司 | Pre-tightening washer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: ANYANG LAIGONG SCIENCE AND?TECHNOLOGY CO., LTD. Free format text: FORMER NAME: ANYANG RABBIT MACHINERY LIMITED COMPANY |
|
| CP01 | Change in the name or title of a patent holder |
Address after: 455000 No. 301 Changjiang Road, Anyang Development Zone, Henan Patentee after: Anyang Laibitai Machinery Co., Ltd. Address before: 455000 No. 301 Changjiang Road, Anyang Development Zone, Henan Patentee before: Anyang Laibitai Machinery Co., Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110427 Termination date: 20160930 |