CN2644055Y - Adjustable prefastening machanism of electric main axle - Google Patents

Adjustable prefastening machanism of electric main axle Download PDF

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Publication number
CN2644055Y
CN2644055Y CN 03277387 CN03277387U CN2644055Y CN 2644055 Y CN2644055 Y CN 2644055Y CN 03277387 CN03277387 CN 03277387 CN 03277387 U CN03277387 U CN 03277387U CN 2644055 Y CN2644055 Y CN 2644055Y
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CN
China
Prior art keywords
bearing
main shaft
electric main
sleeve
spring
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN 03277387
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Chinese (zh)
Inventor
朱金虎
刘士良
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Wuxi Machine Tools Co Ltd
Original Assignee
Wuxi Machine Tools Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Wuxi Machine Tools Co Ltd filed Critical Wuxi Machine Tools Co Ltd
Priority to CN 03277387 priority Critical patent/CN2644055Y/en
Application granted granted Critical
Publication of CN2644055Y publication Critical patent/CN2644055Y/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Abstract

The utility model relates to machinery driving field, in particular to an adjusting mechanism which can adjust pretightening force between an adjusting shaft and a bearing. In technical proposal of the utility model, the end part of an electric main shaft has a tension bar; the external part of the bearing has a bearing brace. A linear bearing is arranged between the bearing brace and a bushing. The bottom of the tension bar has a chassis and the end surface of the chassis is connected with the bearing brace. The tension bar is connected with a spring brace through an adjusting nut. A spring is arranged between the internal end surfaces of the spring brace and the bushing. Through adding an adjustable tightening force mechanism between the electric main shaft and the muff socket, the utility model enables the electric main shaft to suitable for a plurality of rotating speeds; therefore, the application range is enlarged and the service life is prolonged.

Description

The adjustable pre-tightening mechanism of electricity main shaft
Technical field
The utility model relates to mechanical transmission fields, refers in particular to a kind of controlling mechanism that is used to regulate the pretightening force between electric main shaft and bearing.
Background technique
The electricity main shaft should be different with pretightening force between bearing at a high speed with low speed rotation the time.Usually when high speed, pretightening force should suitably lower, to reduce bearing load; When low speed and heavy cut, then should strengthen pretightening force, to improve the rigidity of electric main shaft.In the prior art, the Placement of electric main shaft and bearing as shown in Figure 1: 1 in electric main shaft 6 and sleeve utilize bearing 2 to interconnect, and the spring 4 that plays the pretension effect utilizes spring seat 5 to be installed on the inboard of bearing, and 3 among the figure is locking nut.The defective of this structure is that pretightening force is non-adjustable, utilizes transition fit between bearing and sleeve, and rigidity is poor, and especially electric main shaft is stuck because of thermal stretching easily.
The model utility content
The purpose of this utility model is to design a kind of adjustable pre-tightening mechanism of electric main shaft, by the mechanism of a preload adjustable is set between electric main shaft and sleeve, make electric main shaft can adapt to various rotating speed, thereby enlarged Applicable scope, prolonged working life.
According to scheme provided by the utility model, bearing is installed in end at electric main shaft, there is bearing support outside at bearing, the left end of bearing support inwardly shrinks, encase bearing outer ring after forming step, between bearing support and sleeve, linear bearing is set, pull bar utilizes the chassis of its bottom to be connected with bearing support, on pull bar, utilize adjusting nut to connect spring seat, right side at sleeve is provided with the part that expands outwardly, form the end face step at sleeve lining, spring seat is positioned at the expansion of sleeve, between the step end face of spring seat and sleeve spring is set.
The external diameter on pull bar chassis is less than the external diameter of linear bearing.
The utility model has the advantages that: 1, bearing pre-fastening is adjustable, and easy to adjust and simple, for electric main shaft, when low speed, heavy cut, can pass through adjusting nut, adjusts the pretightening force of spring, to strengthen the pretightening force of bearing, improves the rigidity of electric main shaft; When electric main shaft is in high speed rotating, can suitably reduce pretightening force, to reduce bearing load, prolong the working life of electric main shaft, thereby the high speed performance of electric main shaft is not fully exerted.2, adopt linear bearing after, making between bearing support and sleeve can interference fit, further improves the rigidity of electric main shaft, then need not interference fit between bearing and electric main shaft, avoid electric main shaft stuck because of thermal stretching.
Description of drawings
Fig. 1 is original pre-tightening mechanism figure.
Fig. 2 is a structural drawing of the present utility model.
Embodiment
As shown in Figure 2: bearing 2 is installed in the end at electric main shaft 6, in the outside of bearing 2 bearing support 10 is arranged, the left end of bearing support 10 inwardly shrinks, encase the outer ring of bearing 2 behind the formation step, between the sleeve 1 of bearing support 10 and its outside, linear bearing 9 is set, pull bar 7 utilizes the chassis 11 of its bottom to be connected with bearing support 10, on pull bar 7, utilize adjusting nut 8 to connect spring seat 5, right side at sleeve 1 is provided with the part that expands outwardly, form the end face step at sleeve 1 inwall, spring seat 5 is positioned at the expansion of sleeve 1, between the step end face of spring seat 5 and sleeve 1 spring 4 is set, and the external diameter on pull bar chassis 11 is less than the external diameter of linear bearing 9.
When needs are adjusted pretightening force, rotate adjusting nut 8, pull bar 7 is moved right, driving bearing support 10 moves right, because bearing 2 is fixed on the main shaft 6, when bearing support 10 moves right, just oppress bearing 2, bearing 2 is exerted pressure, when rotating adjusting nut 8, simultaneously can pressuring spring 4, when the pressure on putting on spring 4 equals to put on pressure on the bearing 2, reach state of equilibrium, the power during state of equilibrium is the pretightening force that puts on the bearing 2, therefore, the size of pretightening force is by spring 4 decisions.

Claims (2)

1, the adjustable pre-tightening mechanism of electricity main shaft, comprise and utilize interconnective electric main shaft of bearing and sleeve, it is characterized in that: bearing is installed in the end at electric main shaft, there is bearing support outside at bearing, the left end of bearing support inwardly shrinks, encase bearing outer ring after forming step, between bearing support and sleeve, linear bearing is set, pull bar utilizes the chassis of its bottom to be connected with bearing support, on pull bar, utilize adjusting nut to connect spring seat, the part that expands outwardly is set, form the end face step at sleeve lining on the right side of sleeve, spring seat is positioned at the expansion of sleeve, between the step end face of spring seat and sleeve spring is set.
2, mechanism according to claim 1 is characterized in that: the external diameter on pull bar chassis is less than the external diameter of linear bearing.
CN 03277387 2003-08-02 2003-08-02 Adjustable prefastening machanism of electric main axle Expired - Fee Related CN2644055Y (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 03277387 CN2644055Y (en) 2003-08-02 2003-08-02 Adjustable prefastening machanism of electric main axle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 03277387 CN2644055Y (en) 2003-08-02 2003-08-02 Adjustable prefastening machanism of electric main axle

Publications (1)

Publication Number Publication Date
CN2644055Y true CN2644055Y (en) 2004-09-29

Family

ID=34302767

Family Applications (1)

Application Number Title Priority Date Filing Date
CN 03277387 Expired - Fee Related CN2644055Y (en) 2003-08-02 2003-08-02 Adjustable prefastening machanism of electric main axle

Country Status (1)

Country Link
CN (1) CN2644055Y (en)

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100402206C (en) * 2006-02-10 2008-07-16 东南大学 Intelligent high speed machining of electric main shaft with controllable pre-fastening force
CN100436009C (en) * 2006-11-02 2008-11-26 沈阳建筑大学 Hot-isostatic pressure silicon nitride all-ceramic electric main shaft and its mfg. method
CN101895170A (en) * 2010-08-06 2010-11-24 湖南大学 Electric main shaft with mouse cage type motor stator cooling structure
CN102059357A (en) * 2010-11-30 2011-05-18 无锡机床股份有限公司 High-accuracy sleeve main shaft structure for machine tool
CN102310203A (en) * 2011-06-20 2012-01-11 西安交通大学 High-speed main shaft with controllable non-uniformly distributed pre-tightening force and control method thereof based on regulation and control of hydraulic system
CN102554280A (en) * 2011-12-16 2012-07-11 上海大学 High speed electric spindle with preload control device
CN101704117B (en) * 2009-07-06 2012-09-26 厦门精合电气自动化有限公司 High-speed mainshaft bearing constant-pressure pre-loading device
CN102886713A (en) * 2012-10-19 2013-01-23 无锡市百顺机械厂 Internal grinding device for grinder
CN102974972A (en) * 2012-12-05 2013-03-20 中国南方航空工业(集团)有限公司 Bearing constant-pressure pretightening device and selective assembly method thereof
CN103029020A (en) * 2012-06-18 2013-04-10 上海崇明机床厂 Device for improving precision of steel ball machine tool plate groove
CN103182534A (en) * 2013-03-20 2013-07-03 北京工业大学 Bidirectional pressure regulating pre-tensioner for electric spindle angular contact ball bearing
CN103223499A (en) * 2013-04-07 2013-07-31 北京航空航天大学 Device capable of improving axial rigidity of main shaft of precision machine tool with adjustable bearing pre-tightening force
CN104088912A (en) * 2014-07-16 2014-10-08 广州市昊志机电股份有限公司 Pre-tightening structure for ball electric main shaft bearing
CN105014104A (en) * 2015-06-24 2015-11-04 上海大学 External-adjustable constant-pressure pre-tightening device for motorized spindle
CN106224395A (en) * 2016-09-06 2016-12-14 沃德传动(天津)股份有限公司 A kind of bearing assembly and the pre-tightening apparatus of bearing
CN106224394A (en) * 2016-09-06 2016-12-14 沃德传动(天津)股份有限公司 A kind of bearing assembly and the pre-tightening apparatus of bearing
CN107830065A (en) * 2017-12-04 2018-03-23 洛阳理工学院 Paired thrust ball bearing pre-tightening apparatus
PL422824A1 (en) * 2017-09-12 2019-03-25 Politechnika Łódzka Mechanism of applying tension for the roll supporting angular bearings
PL422823A1 (en) * 2017-09-12 2019-03-25 Politechnika Łódzka Mechanism of applying initial tension for the roll supporting angular bearings
CN109773590A (en) * 2018-12-19 2019-05-21 广州市昊志机电股份有限公司 A kind of collocation structure of spindle thermal
CN113458429A (en) * 2021-07-19 2021-10-01 长春工业大学 Axial bidirectional vibration electric spindle

Cited By (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100402206C (en) * 2006-02-10 2008-07-16 东南大学 Intelligent high speed machining of electric main shaft with controllable pre-fastening force
CN100436009C (en) * 2006-11-02 2008-11-26 沈阳建筑大学 Hot-isostatic pressure silicon nitride all-ceramic electric main shaft and its mfg. method
CN101704117B (en) * 2009-07-06 2012-09-26 厦门精合电气自动化有限公司 High-speed mainshaft bearing constant-pressure pre-loading device
CN101895170A (en) * 2010-08-06 2010-11-24 湖南大学 Electric main shaft with mouse cage type motor stator cooling structure
CN102059357A (en) * 2010-11-30 2011-05-18 无锡机床股份有限公司 High-accuracy sleeve main shaft structure for machine tool
CN102310203A (en) * 2011-06-20 2012-01-11 西安交通大学 High-speed main shaft with controllable non-uniformly distributed pre-tightening force and control method thereof based on regulation and control of hydraulic system
CN102310203B (en) * 2011-06-20 2012-07-04 西安交通大学 High-speed main shaft with controllable non-uniformly distributed pre-tightening force and control method thereof based on regulation and control of hydraulic system
CN102554280A (en) * 2011-12-16 2012-07-11 上海大学 High speed electric spindle with preload control device
CN103029020A (en) * 2012-06-18 2013-04-10 上海崇明机床厂 Device for improving precision of steel ball machine tool plate groove
CN102886713A (en) * 2012-10-19 2013-01-23 无锡市百顺机械厂 Internal grinding device for grinder
CN102974972A (en) * 2012-12-05 2013-03-20 中国南方航空工业(集团)有限公司 Bearing constant-pressure pretightening device and selective assembly method thereof
CN103182534A (en) * 2013-03-20 2013-07-03 北京工业大学 Bidirectional pressure regulating pre-tensioner for electric spindle angular contact ball bearing
CN103223499A (en) * 2013-04-07 2013-07-31 北京航空航天大学 Device capable of improving axial rigidity of main shaft of precision machine tool with adjustable bearing pre-tightening force
CN103223499B (en) * 2013-04-07 2015-02-25 北京航空航天大学 Device capable of improving axial rigidity of main shaft of precision machine tool with adjustable bearing pre-tightening force
CN104088912A (en) * 2014-07-16 2014-10-08 广州市昊志机电股份有限公司 Pre-tightening structure for ball electric main shaft bearing
CN105014104A (en) * 2015-06-24 2015-11-04 上海大学 External-adjustable constant-pressure pre-tightening device for motorized spindle
CN106224394B (en) * 2016-09-06 2019-04-02 沃德传动(天津)股份有限公司 A kind of pre-tightening apparatus of bearing assembly and bearing
CN106224394A (en) * 2016-09-06 2016-12-14 沃德传动(天津)股份有限公司 A kind of bearing assembly and the pre-tightening apparatus of bearing
CN106224395B (en) * 2016-09-06 2019-03-29 沃德传动(天津)股份有限公司 A kind of pre-tightening apparatus of bearing assembly and bearing
CN106224395A (en) * 2016-09-06 2016-12-14 沃德传动(天津)股份有限公司 A kind of bearing assembly and the pre-tightening apparatus of bearing
PL422824A1 (en) * 2017-09-12 2019-03-25 Politechnika Łódzka Mechanism of applying tension for the roll supporting angular bearings
PL422823A1 (en) * 2017-09-12 2019-03-25 Politechnika Łódzka Mechanism of applying initial tension for the roll supporting angular bearings
CN107830065A (en) * 2017-12-04 2018-03-23 洛阳理工学院 Paired thrust ball bearing pre-tightening apparatus
CN109773590A (en) * 2018-12-19 2019-05-21 广州市昊志机电股份有限公司 A kind of collocation structure of spindle thermal
CN113458429A (en) * 2021-07-19 2021-10-01 长春工业大学 Axial bidirectional vibration electric spindle
CN113458429B (en) * 2021-07-19 2023-09-08 长春工业大学 Axial bidirectional vibration electric spindle

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C14 Grant of patent or utility model
GR01 Patent grant
C19 Lapse of patent right due to non-payment of the annual fee
CF01 Termination of patent right due to non-payment of annual fee