CN105014104A - External-adjustable constant-pressure pre-tightening device for motorized spindle - Google Patents
External-adjustable constant-pressure pre-tightening device for motorized spindle Download PDFInfo
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- CN105014104A CN105014104A CN201510352514.8A CN201510352514A CN105014104A CN 105014104 A CN105014104 A CN 105014104A CN 201510352514 A CN201510352514 A CN 201510352514A CN 105014104 A CN105014104 A CN 105014104A
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- bearing
- spring
- bolt
- connecting plate
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q1/00—Members which are comprised in the general build-up of a form of machine, particularly relatively large fixed members
- B23Q1/70—Stationary or movable members for carrying working-spindles for attachment of tools or work
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Support Of The Bearing (AREA)
Abstract
The invention discloses an external-adjustable constant-pressure pre-tightening device for a motorized spindle. The external-adjustable constant-pressure pre-tightening device comprises a shell, a bearing support system and a pre-tightening adjustment system, wherein the bearing support system is consist of a bearing, an inner space ring, an outer space ring, a bearing block, a linear bearing, a fastening bolt and the like; the pre-tightening adjustment system is composed of a spring baffle plate, a bolt, a connecting plate and an adjusting bolt; the spring baffle plate is mounted in the shell, and the ear part of the spring baffle plate is connected to the connecting plate through the bolt; the adjusting bolt extends out of a rear cover of the motorized spindle through a center hole of the connecting plate. During working, the pre-tightening force applied to the bearing can be adjusted in real time by rotating the adjusting bolt. As an external-adjustable constant-pressure pre-tightening force mechanism is arranged between the shell of the motorized spindle and the bearing block, the axial preload of the bearing of the motorized spindle can be adjusted in real time according to different rotating speeds and different loads, the motorized spindle can be always in an optimal working condition, the internal heating phenomenon of the bearing is reduced, and the service life is prolonged. The external pre-tightening force is adjustable, so that the operation is convenient, and meanwhile an external complex device needed by the way that the pre-tightening force is adjusted through electromagnetism or hydraulic pressure is avoided.
Description
Technical field
The present invention relates to mechanized equipment field, particularly relate to a kind of adjustable constant pressure preloading device in outside of electro spindle.
Background technology
Electro spindle is used widely as the critical component of Digit Control Machine Tool, require that electro spindle will adapt to high-speed cutting on the one hand according to Digit Control Machine Tool feature, fine finishining is generally when high-speed cutting, cutting output less rotating speed height main shaft is stressed less, now can the meeting the demands under less pretightning force state of electric mainshaft bearing; Electro spindle will adapt to the slow cutting requirement of lathe on the other hand, and this is roughing often, and cutting output is large, and electro spindle needs larger rigidity to adapt to the larger cutting force of motor bed.According to the working condition requirement of main shaft, the pretightning force of real-time adjustment electro spindle can improve the inside stress of bearing, the caloric value that can also reduce bearing and the thermal deformation caused thus, thus extends bearing service life.
The applying mode of current electric mainshaft bearing pretightning force mainly contains location pretension, level pressure pretension and the pretension by electromagnetism or hydraulic control and applies; Location pretension, level pressure pretension just determine preloading of bearing at assembling stage, in use cannot be real-time adjust according to the different operating speed machining condition of main shaft; The pretension of Electromagnetic Control applies to need electromagnetic proportional valve and is equipped with power supply in outside, and the pretension of hydraulic control applies to need outside various hydraulic means; Therefore need to develop a kind of can at the outside adjustable fairly simple pre-tightening apparatus easily again of main shaft to improve the inside force-bearing situation of bearing to adapt to the requirement of the different working condition of different rotating speeds.
Summary of the invention
The object of the invention is to the limitation overcoming traditional electrical main shaft bearing pretension, there is provided a kind of outside of electro spindle adjustable constant pressure preloading device, by changing contained spring baffle plate to the active force of spring in outside adjusting bolt, thus change the pretightning force of bearing in real time, make electro spindle adapt to different working condition requirement and increase the service life.
For achieving the above object, technical scheme of the present invention is:
The adjustable constant pressure preloading device in outside of electro spindle, comprises the adjustable level pressure pretensioner systems in housing, rotating shaft, bearing support system and outside; It is characterized in that: described bearings system comprises bearing, fastening nut, cone spacer, outer ring spacer, bearing block and linear bearing, described bearing is that pair of horns contact ball bearing is arranged in the same way in the middle part of rotating shaft, and two bearings is connected by cone spacer outer ring spacer and fixed by the shaft shoulder and fastening nut; Bearing is placed in bearing block, and bearing block is placed in axle housing by linear bearing; An adjustable level pressure pretensioner systems in outside is had to comprise spring, spring stop, bolt, connecting plate, spring and adjusting bolt, described spring is wavy spring, described spring is ring spring, four ears of spring stop to be placed in axle housing groove and to be bolt-coupled on connecting plate, adjusting bolt passes connecting plate, spring successively by being threadedly coupled on bonnet, by rotating the initial pretightning force of axle housing investigation mission outside the city or town joint bolt adjustable bearings preloading spring during work.
The present invention compared with the prior art, has following outstanding substantive distinguishing features and marked improvement:
(1) change by outside adjusting bolt the pretightning force that electro spindle contained spring baffle plate applies preloading spring, when bearing working, spring level pressure pretension can ensure level pressure pretightning force according to axle temperature distortion, thus realizes in the outside of main shaft adjustable inner level pressure pretension function.
(2) avoid outside complicated adjusting device and required supporting power supply or hydraulic system etc., only need the adjusting bolt of revolving outer can regulate inner pretightning force in real time, device of the present invention has simple and practical feature.
Accompanying drawing explanation
Fig. 1 is the structural representation of one embodiment of the invention.
Fig. 2 is the profile at the spring stop place in Fig. 1.
Fig. 3 is the connecting plate schematic diagram in Fig. 1.
In figure, each symbol represents:
1, axle housing 2, linear bearing
3, bearing block 4, bearing
5, rotating shaft 6, cone spacer
7, outer ring spacer 8, clamp nut
9, spring stop 10, spring
11, bolt 12, connecting plate
13, bonnet 14, spring
15, adjusting bolt.
embodiment
The preferred embodiments of the present invention 1 are described as follows by reference to the accompanying drawings:
Embodiment one:
See Fig. 1 ~ Fig. 3, the adjustable constant pressure preloading device in outside of this kind of electro spindle, comprises the adjustable level pressure pretensioner systems in housing, rotating shaft 5, bearing support system and outside; It is characterized in that: described bearings system comprises bearing 4, fastening nut 8, cone spacer 6, outer ring spacer 7, bearing block 3 and linear bearing 2, described bearing 4 is that pair of horns contact ball bearing is arranged in the same way in the middle part of rotating shaft, and two bearings is connected by cone spacer 6 outer ring spacer 7 and fixed by the shaft shoulder and fastening nut 8; Bearing 4 is placed in bearing block 3, and bearing block 3 is placed in axle housing 1 by linear bearing 2; An adjustable level pressure pretensioner systems in outside is had to comprise spring 10, spring stop 9, bolt 11, connecting plate 12, spring 14 and adjusting bolt 15, described spring 10 is wavy spring, described spring 14 is ring spring, four ears of spring stop 9 to be placed in axle housing 1 groove and to be connected on connecting plate 12 by bolt 11, adjusting bolt 15 passes connecting plate 12, spring 14 successively by being threadedly coupled on bonnet 13, by rotating the initial pretightning force of axle housing investigation mission outside the city or town joint bolt adjustable bearings preloading spring during work.
Embodiment two:
See Fig. 1 ~ Fig. 3, the adjustable constant pressure preloading device in outside of this electro spindle, is made up of parts such as housing, bearing support system, pretension regulating systems; Bearing support system is made up of bearing 4, cone spacer 6 outer ring spacer 7, bearing block 3, linear bearing 2, fastening bolt 8 etc.; Pretension regulating system is made up of spring stop 9, bolt 11, connecting plate 12, adjusting bolt 15.During installation, bearing block 3 forms shoulder by wavy spring 10 on bearing block 3 in rearward end, and the ear of spring stop 9 is placed in the groove of housing 1, and spring stop 9 is by wavy spring 10 compression axis bearing 3, and the ear of spring stop connects with bolt 11.Bearing block 3 is placed in housing 1 by linear bearing 2, and bearing 4 is connected by cone spacer 6, outer ring spacer 7 and is placed in bearing block 3, and rotating shaft 5 to be placed in bearing 4 and to be connected by fastening nut 8.Spring stop 9 is connected with connecting plate 12 by bolt 11, and adjusting bolt 15, through connecting plate 12 centre bore, passes the centre bolt hole of bonnet after putting ring spring 14, and described adjusting bolt 15 has flat recess convenient rotation adjusting bolt 15.
When needs regulate bearing pre-fastening, the adjusting bolt 15 being rotated in axle housing outside can change the displacement of connecting plate 12, drives spring stop 9 to move thus change the pretightning force of spring 10 pairs of bearing blocks by bolt 11; Rotating adjusting bolt 15 when increasing pretightning force makes connecting plate 12 move to bonnet 13 direction, namely increases the thrust of spring stop 9 pairs of springs 10; Rotate adjusting bolt 15 when reducing pretightning force to indentation in axle housing, namely spring 10 promotes connecting plate 12 mobile drive bolt 11, spring stop 9 in axle housing and moves in the middle part of axle housing, reduces the decrement of spring 10 thus reduces pretightning force.Therefore the pretightning force of electro spindle internal bearings is by adjusting bolt 15 and wavy spring 10 co-controlling.
The above; it is only preferred embodiment of the present invention; not the present invention is imposed any restrictions; in every case those of ordinary skill in the art are according to the essence of the technology of the present invention to any simple modification made for any of the above embodiments, change and equivalent structure change, all still belong in technical scheme protection domain of the present invention.
Claims (1)
1. the adjustable constant pressure preloading device in the outside of electro spindle, comprises housing, rotating shaft (5), the adjustable level pressure pretensioner systems of bearing support system and outside, it is characterized in that: described bearings system comprises bearing (4), fastening nut (8), cone spacer (6), outer ring spacer (7), bearing block (3) and linear bearing (2), described bearing (4) is arranged in the middle part of the rotating shaft in the same way for pair of horns contact ball bearing, and two bearings is connected by cone spacer (6) outer ring spacer (7) and fixed by the shaft shoulder and fastening nut (8), bearing (4) is placed in bearing block (3), and bearing block (3) is placed in axle housing (1) by linear bearing (2), an adjustable level pressure pretensioner systems in outside is had to comprise spring (10), spring stop (9), bolt (11), connecting plate (12), spring (14) and adjusting bolt (15), described spring (10) is wavy spring, described spring (14) is ring spring, four ears of spring stop (9) to be placed in axle housing (1) groove and to be connected on connecting plate (12) by bolt (11), adjusting bolt (15) is successively through connecting plate (12), spring (14) is by being threadedly coupled on bonnet (13), by rotating the initial pretightning force of axle housing investigation mission outside the city or town joint bolt adjustable bearings preloading spring during work.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510352514.8A CN105014104A (en) | 2015-06-24 | 2015-06-24 | External-adjustable constant-pressure pre-tightening device for motorized spindle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510352514.8A CN105014104A (en) | 2015-06-24 | 2015-06-24 | External-adjustable constant-pressure pre-tightening device for motorized spindle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105014104A true CN105014104A (en) | 2015-11-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510352514.8A Pending CN105014104A (en) | 2015-06-24 | 2015-06-24 | External-adjustable constant-pressure pre-tightening device for motorized spindle |
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| CN (1) | CN105014104A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105642920A (en) * | 2016-03-22 | 2016-06-08 | 浙江旺邦精密机床有限公司 | Machine tool main shaft device which is internally provided with clamping mechanism and can achieve simultaneous machining in two directions |
| CN108044137A (en) * | 2018-02-02 | 2018-05-18 | 湖南大学 | A kind of intelligence electric mainshaft bearing rigidity regulation and control method, system and intelligent electro spindle |
| CN112524152A (en) * | 2019-09-17 | 2021-03-19 | 福建金风科技有限公司 | Bearing clearance adjusting device and method and wind generating set |
| CN112917185A (en) * | 2019-12-05 | 2021-06-08 | 北京精雕科技集团有限公司 | High-speed machining electric spindle with adjustable pre-tightening force of bearing group |
| CN113552381A (en) * | 2021-07-26 | 2021-10-26 | 上海航数智能科技有限公司 | Monitoring and predicting system based on rotating speed of gas turbine |
| CN113847354A (en) * | 2021-09-28 | 2021-12-28 | 珠海格力电器股份有限公司 | Low-noise vibration high-speed motor bearing adjustable pre-tightening device |
| CN114101719A (en) * | 2021-10-27 | 2022-03-01 | 珠海格力电器股份有限公司 | Bearing pretightening force adjusting device, electric main shaft and machine tool |
| CN114454091A (en) * | 2022-02-09 | 2022-05-10 | 广东创能精密机械有限公司 | Main shaft capable of adjusting bearing pretightening force electromagnetically |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0474902A1 (en) * | 1990-09-12 | 1992-03-18 | Kitamura Machinery Co.,Ltd. | A preload control apparatus for bearings |
| CN2644055Y (en) * | 2003-08-02 | 2004-09-29 | 无锡机床股份有限公司 | Adjustable prefastening machanism of electric main axle |
| CN201807744U (en) * | 2010-09-30 | 2011-04-27 | 安阳莱必泰机械有限公司 | Reliable electric spindle constant voltage pre-tightening structure |
| 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 |
-
2015
- 2015-06-24 CN CN201510352514.8A patent/CN105014104A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0474902A1 (en) * | 1990-09-12 | 1992-03-18 | Kitamura Machinery Co.,Ltd. | A preload control apparatus for bearings |
| CN2644055Y (en) * | 2003-08-02 | 2004-09-29 | 无锡机床股份有限公司 | Adjustable prefastening machanism of electric main axle |
| CN201807744U (en) * | 2010-09-30 | 2011-04-27 | 安阳莱必泰机械有限公司 | Reliable electric spindle constant voltage pre-tightening structure |
| 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 |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105642920A (en) * | 2016-03-22 | 2016-06-08 | 浙江旺邦精密机床有限公司 | Machine tool main shaft device which is internally provided with clamping mechanism and can achieve simultaneous machining in two directions |
| CN108044137A (en) * | 2018-02-02 | 2018-05-18 | 湖南大学 | A kind of intelligence electric mainshaft bearing rigidity regulation and control method, system and intelligent electro spindle |
| CN112524152A (en) * | 2019-09-17 | 2021-03-19 | 福建金风科技有限公司 | Bearing clearance adjusting device and method and wind generating set |
| CN112524152B (en) * | 2019-09-17 | 2023-05-09 | 福建金风科技有限公司 | Bearing play adjusting device and method and wind generating set |
| CN112917185A (en) * | 2019-12-05 | 2021-06-08 | 北京精雕科技集团有限公司 | High-speed machining electric spindle with adjustable pre-tightening force of bearing group |
| CN113552381A (en) * | 2021-07-26 | 2021-10-26 | 上海航数智能科技有限公司 | Monitoring and predicting system based on rotating speed of gas turbine |
| CN113847354A (en) * | 2021-09-28 | 2021-12-28 | 珠海格力电器股份有限公司 | Low-noise vibration high-speed motor bearing adjustable pre-tightening device |
| CN113847354B (en) * | 2021-09-28 | 2022-07-12 | 珠海格力电器股份有限公司 | Low-noise vibration high-speed motor bearing adjustable pre-tightening device |
| CN114101719A (en) * | 2021-10-27 | 2022-03-01 | 珠海格力电器股份有限公司 | Bearing pretightening force adjusting device, electric main shaft and machine tool |
| CN114454091A (en) * | 2022-02-09 | 2022-05-10 | 广东创能精密机械有限公司 | Main shaft capable of adjusting bearing pretightening force electromagnetically |
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Application publication date: 20151104 |