CN103182534B - Bidirectional pressure regulating pre-tensioner for electric spindle angular contact ball bearing - Google Patents
Bidirectional pressure regulating pre-tensioner for electric spindle angular contact ball bearing Download PDFInfo
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- CN103182534B CN103182534B CN201310090695.2A CN201310090695A CN103182534B CN 103182534 B CN103182534 B CN 103182534B CN 201310090695 A CN201310090695 A CN 201310090695A CN 103182534 B CN103182534 B CN 103182534B
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Abstract
The invention relates to a bidirectional pressure regulating pre-tensioner for an electric spindle angular contact ball bearing and belongs to the field of mechanical design and manufacturing. The bidirectional pressure regulating pre-tensioner comprises a pressure ring (a), a load-adding sheath (b), an elastic element (c) and a bidirectional force sensor (d), wherein the pressure ring is formed by a bearing outer ring supporting sleeve, a bearing sealing ring and a thrust ring; the load-adding sheath consists of a left-handed stud, a hexagonal sleeve and a right-handed stud; and the elastic element consists of both left and right fixed plates, two tension spring sleeves which are symmetrically distributed, two pull rods which are symmetrically distributed, four compression springs, two pressure rods which are symmetrically distributed, and two pressing sleeves which are symmetrically distributed. The bidirectional pressure regulating pre-tensioner realizes bidirectional quantitive constant-pressure pre-tensioning on a bearing pack, can ensure that an axial pre-tensioning force of the bearing pack is constant when the electric spindle bearing generates axial displacement, ensures rotating accuracy and rigidity of the electric spindle bearing in the high-speed rotating process, also can quantitively regulate the pre-tensioning force and avoids the phenomenon that the bearing is blocked and burnt down due to excessively high heat generation.
Description
Technical field
The invention discloses a kind of two-way quantitative adjustable pre-tightening device, be mainly used in mainshaft bearing constant-pressure pre-loading, this invention belongs to machine design and manufacture field.
Background technique
High-speed & precise progressive die is an important development direction of mechanical manufacturing field, and electro spindle is the core functional components of high-speed processing machine tool.Electro spindle angular contact ball bearing adopts level pressure pretension to reach increases bearing rigidity, reduce bear vibration, improve the multi-effect such as the running accuracy of axle and minimizing rolling element revolution skidding, level pressure pretension refers to a kind of axial pretightening mode that the axial pretightening load of bearing in use remains unchanged, by the decrement of Regulation spring to obtain certain pretension amount.
The level pressure pre-tension method adopted in tradition can only realize unidirectional pretension, restricted application, along with the increase of axial displacement, pretightening force is changed significantly, electro spindle pretightening force when running up can not be kept constant, and can not direct quantitative display pretightening force size in spindle operation.Also have and adopt hydraulic pre-tightening mode, but its complex structure, manufacture and maintenance cost high.
Summary of the invention
For the problems referred to above, based on the multiple matching method of bearing, the present invention proposes the bearing pre-tightening device that a kind of two-way quantitative is adjustable, under solving different bearing matching form, accurately constant level pressure pretightening force problem is applied to electro spindle angular contact ball bearing.
For achieving the above object, a kind of electro spindle angular contact ball bearing bidirectional pressure regulating pre-tightening apparatus of the present invention, it is characterized in that, it is characterized in that, this device comprises four parts: pressure ring (a), loading cover (b), elastic component (c), bidirectional force sensor (d);
Pressure ring (a) composition comprises bearing outer ring supporting sleeve (1), bearing seal ring (2), Thrust ring (3); Can axial slip between bearing outer ring supporting sleeve (1) and bearing support, bearing outer ring supporting sleeve (1) is enclosed within the outside of electro spindle angular contact ball bearing, one end of bearing outer ring supporting sleeve (1) is with corner edges, corner edges withstands angular contact ball bearing, in bearing outer ring supporting sleeve (1) inherence, chamber, the other end of angular contact ball bearing is bearing seal ring (2), bearing seal ring (2) next-door neighbour's Thrust ring (3), Thrust ring (3) is fixedly connected with bearing outer ring supporting sleeve (1) simultaneously.
Preferred bearing outer ring supporting sleeve (1) and Thrust ring 3 are fixedly connected into a chamber, and the end of electro spindle is placed in this chamber.
Preferred bearing outer ring supporting sleeve (1), Thrust ring (3) are connected by the bolt of 6 M6 of circle distribution.
B composition that () loads cover comprises the left-hand bolt (4), six rib covers (5) and the right-hand bolt (6) that connect successively; Left-hand bolt (4) is fixedly connected with Thrust ring (3);
The composition of elastic component (c) comprises two fixed plates in left and right, 7 (1) and 7 (2), two extension spring covers (8), two pull bars (9), four springs (10), two depression bars (12) and two glands (13);
The left side fixed plate 7 (1) be fixedly connected with right-hand bolt (6) is fixedly connected with two glands 13 with two extension spring covers (8); Two extension spring covers (8) and two glands (13) distribute in tetragonal prism, and two extension spring covers (8) are positioned at the diagonal angle of tetragonal prism, and two glands (13) are positioned at another diagonal angle of tetragonal prism; The straight tube that extension spring cover (8) is end perforate, the inner chamber of gland (13) is the cylinder with step of two different inner diameters, and the inner chamber of gland (13) is little at the internal diameter of the part near left side fixed plate 7 (1);
Left side fixed plate 7 (2) is fixedly connected with two pull bars (9), two depression bars (12), pull bar (9) is T-shaped pull bar, the T-shape position of two pull bars lays respectively in two extension spring cover (8) chambeies, in extension spring cover (8) chamber two pull bars (9) axle on all cover have a spring, realized the compression of spring by pull bar (9); Depression bar (12) is T-shaped depression bar, the axle head of two depression bars is positioned at the inner chamber of gland (13), T-shape position at gland (13) outward, on the axle of depression bar (12), cover has spring, spring is at the diameter of gland (13) comparatively in major lumen, the diameter of spring is greater than the diameter of the less inner chamber of gland (13), makes spring prop up step in gland (13).
Symmetrical with two respectively pull bar 9, two the symmetrical depression bars 12 of preferred the right fixed plate 7 (2) are fixedly connected with by four M10 bolts.
Bidirectional force sensor (d) one end is fixedly connected with the right fixed plate 7 (2), and the bidirectional force sensor the other end is connected with frame.
Preferred pressure ring (a) and (b) are loaded to overlap and are connected by the left-hand bolt of one group of M12, pad and nut; Loading cover (b) is revolved bolt, pad and nut with elastic component (c) by the dextrorotation of one group of M12 and is connected; Elastic component (c) revolves bolt with bidirectional force sensor (d) by the dextrorotation of one group of M12, nut connects; Load cover to be connected with pressure ring center by single left-handed nut 4, load cover and be connected by dextrorotation stud 6 with Flexible element, elastic component and bidirectional force sensor are by Stud connection, and sensor is connected with frame by stud.
Pressure ring can produce axial slip with housing, transmits pretightening force to the bearing outer ring of different matching form; Load cover and regulate pretightening force size and Orientation by rotating six rib covers 5; Flexible element realizes bearing by two groups of symmetrical compression spring components and tension spring component and keep pretightening force constant magnitude under different matching form; Bidirectional force sensor can show pretightening force size and Orientation constantly.
The present invention is achieved by elastic component part and carries out two-way quantitative constant voltage pretension to bearing pack.When electric mainshaft bearing generation axial displacement, can guarantee that the axial pre tightening force of bearing pack is constant, ensure that the running accuracy of electric mainshaft bearing when High Rotation Speed and rigidity, can quantitatively regulate pretightening force size simultaneously, avoid the heat-dissipating amount of bearing to cause too greatly and stuckly burn phenomenon.Improve progress and the working life of electro spindle operation.
Accompanying drawing illustrates:
The general structure schematic diagram of Fig. 1 electro spindle angular contact ball bearing of the present invention bidirectional pressure regulating pre-tightening apparatus.
Pressure ring a, loads cover b, elastic component c, bidirectional force sensor d,
Bearing outer ring supporting sleeve 1, bearing seal ring 2, Thrust ring 3, left-hand bolt 4, six rib covers 5, right-hand bolt 6, left side fixed plate 7 (1), the right fixed plate 7 (2), extension spring cover 8, pull bar 9, spring 10, bidirectional force sensor 11, depression bar 12, gland 13.
Embodiment
Embodiment 1:
Be described below in conjunction with accompanying drawing, but the invention is not restricted to following examples.
This device is made up of four parts, comprising: pressure ring a, loading cover (b), elastic component c, bidirectional force sensor d;
Pressure ring a and b is loaded cover and is connected by the left-hand bolt of one group of M12, pad and nut; Loading cover (b) is revolved bolt, pad and nut with c Flexible element by the dextrorotation of one group of M12 and is connected; C Flexible element revolves bolt with bidirectional force sensor d by the dextrorotation of one group of M12, nut connects;
Pressure ring a composition comprises bearing outer ring supporting sleeve 1, bearing seal ring 2, Thrust ring 3, can axial slip between bearing outer ring supporting sleeve 1 and bearing support, bearing outer ring supporting sleeve 1 is enclosed within the outside of electro spindle angular contact ball bearing, one end of bearing outer ring supporting sleeve 1 is with corner edges, corner edges withstands angular contact ball bearing, in inherence, bearing outer ring supporting sleeve 1 chamber, the other end of angular contact ball bearing is bearing seal ring 2, bearing seal ring 2 is close to Thrust ring 3 namely, along the axis of electro spindle, bearing outer ring supporting sleeve 1 props up angular contact ball bearing, angular contact ball bearing and bearing seal ring 2 are clipped between the corner edges of bearing outer ring supporting sleeve 1 and Thrust ring 3, Thrust ring 3 is fixedly connected with bearing outer ring supporting sleeve 1 simultaneously, bearing outer ring supporting sleeve 1 is fixedly connected into a chamber, the end of electro spindle is placed in this chamber.Bearing outer ring supporting sleeve 1, Thrust ring 3 are connected by the bolt of 6 M6 of circle distribution.
The composition loading cover b comprises left-hand bolt 4, the six rib cover 5 and right-hand bolt 6 that connect successively; Left-hand bolt 4 is fixedly connected with Thrust ring 3;
The composition of elastic component c comprises two, left and right fixed plate, 7 (1) and 7 (2), two extension spring cover 8, two pull bars, 9, four springs, 10, two depression bars 12 and two glands 13;
The left side fixed plate 7 (1) be fixedly connected with right-hand bolt 6 and two extension springs are overlapped 8 and are fixedly connected with two glands 13; Two extension spring covers 8 and two gland 13 distributions in tetragonal prism, two extension spring covers 8 are positioned at the diagonal angle of tetragonal prism, and two glands 13 are positioned at another diagonal angle of tetragonal prism; Extension spring cover 8 is the straight tube of end perforate, and the inner chamber of gland 13 is the cylinder with step of two different inner diameters, and the inner chamber of gland 13 is little at the internal diameter of the part near left side fixed plate 7 (1);
Left side fixed plate 7 (2) and two pull bars 9, two depression bars 12 are fixedly connected with, pull bar 9 is T-shaped pull bar, the T-shape position of two pull bars lays respectively at two extension springs and overlaps in 8 chambeies, on the axle that two pull bars 9 in 8 chambeies are overlapped in extension spring, all cover has a spring, is realized the compression of spring by pull bar 9; Depression bar 12 is T-shaped depression bar, the axle head of two depression bars is positioned at the inner chamber of gland 13, T-shape position is outside gland 13, on the axle of depression bar 12, cover has spring, spring is at the diameter of gland 13 comparatively in major lumen, the diameter of spring is greater than the diameter of the less inner chamber of gland 13, makes spring prop up step in gland 13.
Fixed plate 7 (2) symmetrical with two respectively pull bar 9, two symmetrical depression bars 12 in the right are fixedly connected with by four M10 bolts.
Bidirectional force sensor d two ends are with the tapped hole of M12, and wherein one end is fixedly connected with the right fixed plate 7 (2), and the bidirectional force sensor the other end is connected with frame.
Load cover to be connected with pressure ring center by single left-handed nut 4, load cover and be connected by dextrorotation stud 6 with Flexible element, Flexible element and bidirectional force sensor pass through Stud connection.
Diagonal angle contact ball bearing group applies to need axially to draw pretension.Connecting means according to Fig. 1, rotates six ribs covers 5 and to further pressure ring and Flexible element, produce and axially draws pretension, proofread, carry out accurate pretension to bearing according to the value of thrust size that sensor 11 shows.
Now, pressure ring a middle (center) bearing outer ring supporting sleeve 1, fastens bearing outer ring and drives bearing outer ring to move to axle head, producing axial slip between outer ring supporting sleeve 1 and bearing support block.Bearing seal ring 2, Thrust ring 3 synchronously produce axial displacement to the right.In Flexible element, depression bar 12 and pressure sleeve 13 are from not bearing axial force, pull bar 9 and extension spring are overlapped 8 and one group of spring-compressed are transmitted axial tension, and in electro spindle running, bearing outer ring produces certain axial displacement, compression spring can compensating axial displacement by certain distortion, keeps pretightening force constant.
Embodiment 2:
Be described below in conjunction with accompanying drawing.
Diagonal angle contact ball bearing group applies to need axially to press pretension.Connecting means according to Fig. 1, rotates six ribs covers 5 and to further pressure ring and Flexible element, produce and axially presses pretension, proofread, carry out accurate pretension to bearing according to the force value size that sensor 11 shows.
Now, pressure ring a middle (center) bearing bearing seal ring 2, withstands bearing outer ring and drives bearing outer ring to move away from axle head, producing axial slip between outer ring supporting sleeve 1 and bearing support block.Bearing seal ring 2, Thrust ring 3 and outer ring supporting sleeve 1 synchronously produce axial displacement left.In Flexible element, pull bar 9 and extension spring are overlapped 8 and are not closely born axial force, and one group of spring-compressed is transmitted axial pressure by depression bar 12 and compression spring sleeve 13.The same example, in electro spindle running, bearing outer ring produces certain axial displacement, and compression spring can compensating axial displacement by certain distortion, keeps pretightening force constant.
Claims (7)
1. an electro spindle angular contact ball bearing bidirectional pressure regulating pre-tightening apparatus, is characterized in that, this device comprises four parts: pressure ring (a), loading cover (b), elastic component (c), bidirectional force sensor (d);
Pressure ring (a) composition comprises bearing outer ring supporting sleeve (1), bearing seal ring (2), Thrust ring (3); Can axial slip between bearing outer ring supporting sleeve (1) and bearing support, bearing outer ring supporting sleeve (1) is enclosed within the outside of electro spindle angular contact ball bearing, one end of bearing outer ring supporting sleeve (1) is with corner edges, corner edges withstands angular contact ball bearing, in bearing outer ring supporting sleeve (1) inherence, chamber, the other end of angular contact ball bearing is bearing seal ring (2), bearing seal ring (2) next-door neighbour's Thrust ring (3), Thrust ring (3) is fixedly connected with bearing outer ring supporting sleeve (1) simultaneously;
The composition loading cover (b) comprises the left-hand bolt (4), six rib covers (5) and the right-hand bolt (6) that connect successively; Left-hand bolt (4) is fixedly connected with Thrust ring (3);
The composition of elastic component (c) comprises left side fixed plate (7 (1)) and the right fixed plate (7 (2)), two extension spring covers (8), two pull bars (9), four springs (10), two depression bars (12) and two glands (13);
The left side fixed plate (7 (1)) be fixedly connected with right-hand bolt (6) is fixedly connected with two glands (13) with two extension spring covers (8); Two extension spring covers (8) and two glands (13) distribute in tetragonal prism, and two extension spring covers (8) are positioned at the diagonal angle of tetragonal prism, and two glands (13) are positioned at another diagonal angle of tetragonal prism; The straight tube that extension spring cover (8) is end perforate, the inner chamber of gland (13) is the cylinder with step of two different inner diameters, and the inner chamber of gland (13) is little at the internal diameter of the part near left side fixed plate (7 (1));
The right fixed plate (7 (2)) is fixedly connected with two pull bars (9), two depression bars (12), pull bar (9) is T-shaped pull bar, the T-shape position of two pull bars lays respectively in two extension spring cover (8) chambeies, in extension spring cover (8) chamber two pull bars (9) axle on all cover have a spring, realized the compression of spring by pull bar (9); Depression bar (12) is T-shaped depression bar, the axle head of two depression bars is positioned at the inner chamber of gland (13), T-shape position at gland (13) outward, on the axle of depression bar (12), cover has spring, spring is at the diameter of gland (13) comparatively in major lumen, the diameter of spring is greater than the diameter of the less inner chamber of gland (13), makes spring prop up step in gland (13);
Bidirectional force sensor (d) one end is fixedly connected with the right fixed plate (7 (2)), and the bidirectional force sensor the other end is connected with frame.
2. according to the device of claim 1, it is characterized in that, bearing outer ring supporting sleeve (1) and Thrust ring (3) are fixedly connected into a chamber, and the end of electro spindle is placed in this chamber.
3. according to the device of claim 1, it is characterized in that, bearing outer ring supporting sleeve (1), Thrust ring (3) are connected by the bolt of 6 M6 of circle distribution.
4. according to the device of claim 1, it is characterized in that, the right fixed plate (7 (2)) is fixedly connected with two pull bars (9), two depression bars (12), two pull bars (9) are symmetrical, two depression bars (12) are symmetrical, be fixedly connected with respectively by M10 bolt, totally four M10 bolts.
5. according to the device of claim 1, it is characterized in that, pressure ring (a) and load and overlap (b) and connected by the left-hand bolt of one group of M12, pad and nut; Load cover (b) and elastic component (c) to be connected by the right-hand bolt of one group of M12, pad and nut.
6. according to the device of claim 1, it is characterized in that, elastic component (c) revolves bolt with bidirectional force sensor (d) by the dextrorotation of one group of M12, nut connects.
7. according to the device of claim 1, it is characterized in that, load cover to be connected with pressure ring center by single left-hand bolt (4), load cover to be connected by right-hand bolt (6) with Flexible element, elastic component and bidirectional force sensor are by Stud connection, and sensor is connected with frame by stud.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310090695.2A CN103182534B (en) | 2013-03-20 | 2013-03-20 | Bidirectional pressure regulating pre-tensioner for electric spindle angular contact ball bearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310090695.2A CN103182534B (en) | 2013-03-20 | 2013-03-20 | Bidirectional pressure regulating pre-tensioner for electric spindle angular contact ball bearing |
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| Publication Number | Publication Date |
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| CN103182534A CN103182534A (en) | 2013-07-03 |
| CN103182534B true CN103182534B (en) | 2015-03-25 |
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| CN201310090695.2A Expired - Fee Related CN103182534B (en) | 2013-03-20 | 2013-03-20 | Bidirectional pressure regulating pre-tensioner for electric spindle angular contact ball bearing |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104493512B (en) * | 2014-12-19 | 2017-04-05 | 无锡大龙马数控机床制造有限责任公司 | Machining center base worktable |
| CN105138814A (en) * | 2015-06-03 | 2015-12-09 | 北京工业大学 | Method for analyzing limit pretension force of angular contact ball bearing under fixed-position pretension of high-speed electric spindle |
| CN105014104A (en) * | 2015-06-24 | 2015-11-04 | 上海大学 | External-adjustable constant-pressure pre-tightening device for motorized spindle |
| CN109945767B (en) * | 2019-03-15 | 2021-01-26 | 湖北三江航天万峰科技发展有限公司 | Angular contact bearing pre-tightening force adjusting method for indexing mechanism of positioning and orienting system |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0835520A (en) * | 1994-07-27 | 1996-02-06 | Hitachi Seiki Co Ltd | Preload adjusting device for main shaft bearing |
| DE19854348C1 (en) * | 1998-11-25 | 2000-04-27 | Fortuna Werke Maschf Ag | High-frequency machine tool spindle and method for adjusting initial tension in an angular contact roller ball bearing fitted in it, uses piezoactuator tension of varied longitudinal dimensions for exerting variable tension force |
| CN2634198Y (en) * | 2003-07-14 | 2004-08-18 | 肇庆新宝华电子设备有限公司 | Support structure of driving screw |
| 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 |
| CN1546264A (en) * | 2003-11-28 | 2004-11-17 | 湖南大学 | High-speed main shaft rigidity variation method and apparatus |
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