CN103182534A - 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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- CN103182534A CN103182534A CN2013100906952A CN201310090695A CN103182534A CN 103182534 A CN103182534 A CN 103182534A CN 2013100906952 A CN2013100906952 A CN 2013100906952A CN 201310090695 A CN201310090695 A CN 201310090695A CN 103182534 A CN103182534 A CN 103182534A
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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) a pressure ring, (b) a load-adding sheath, (c) an elastic element and (d) a bidirectional force sensor, 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 apparatus, be mainly used in mainshaft bearing constant-pressure pre-loading, this invention belongs to Machine Design and manufacturing field.
Background technology
High speed and precision processing is an important development direction of mechanical manufacturing field, and electric main shaft is the Core Feature parts of high-speed processing machine tool.Multiple effects such as electricity spindle angular contact ball bearing adopts the level pressure pretension to reach increases bearing rigidity, reduce bear vibration, improve the running accuracy of axle and reduce that the rolling element revolution is skidded, the level pressure pretension refers to a kind of axial pretightening mode that the axial pretightening load of bearing in use remains unchanged, and the decrement by regulating spring is to obtain certain pretension amount.
The pre-clamping method of the level pressure that adopts in the tradition can only be realized unidirectional pretension, restricted application, along with the increase of axial displacement, pretightning force is changed significantly, can not keep electric main shaft pretightning force when running up constant, and in spindle operation, can not direct quantitative show the pretightning force size.The hydraulic pre-tightening of employing mode is also arranged, but its complex structure is made and the maintenance cost height.
Summary of the invention
At the problems referred to above, based on the multiple matching method of bearing, the present invention proposes a kind of two-way quantitatively adjustable bearing pre-tightened device, solved under the different bearing matching forms, electric spindle angular contact ball bearing is applied accurately constant level pressure pretightning force problem.
For achieving the above object, a kind of electric 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: (a) pressure rings, (b) load cover, (c) elastic parts, (d) bidirectional force sensor;
(a) pressure rings is formed and is comprised bearing outer ring support set (1), bearing seal ring (2), thrust ring (3); Can axial slip between bearing outer ring support set (1) and the bearing block, bearing outer ring support set (1) is enclosed within the outside of electric spindle angular contact ball bearing, one end of bearing outer ring support set (1) has corner edges, corner edges is withstood angular contact ball bearing, the other end of angular contact ball bearing is bearing seal ring (2) in bearing outer ring support set (1) inherence, chamber, bearing seal ring (2) next-door neighbour thrust ring (3), thrust ring (3) is fixedlyed connected with bearing outer ring support set (1) simultaneously.
Preferred axes bearing outer-ring support set (1) is fixedly connected into a chamber with thrust ring 3, and the end of electric main shaft is placed in this chamber.
Preferred axes bearing outer-ring support set (1), thrust ring (3) connect by the bolt of 6 M6 of circle distribution.
(b) load the composition that overlaps and comprise left-handed bolt (4), six rib covers (5) and the dextrorotation bolt (6) that connects successively; Left-handed bolt (4) is fixedlyed connected with thrust ring (3);
(c) two fixed head 7(1 about the composition of elastic parts comprises) 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 head 7(1 of fixedlying connected with dextrorotation bolt (6)) fixedlys connected with two glands 13 with two extension spring covers (8); Two extension spring covers (8) and two glands (13) are tetragonal prism and distribute, 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; Extension spring cover (8) is the straight tube of end perforate, and the inner chamber of gland (13) is the tube with step of two different inner diameters, and the inner chamber of gland (13) is at close left side fixed head 7(1) the internal diameter of part little;
Left side fixed head 7(2) fixedlys connected with two pull bars (9), two depression bars (12), pull bar (9) is T type pull bar, the T-shape position of two pull bars lays respectively in two extension spring covers (8) chamber, in extension spring cover (8) chamber, all be with a spring on the axle of two pull bars (9), realize the compression of spring by pull bar (9); Depression bar (12) is T type depression bar, the axle head of two depression bars is positioned at the inner chamber of gland (13), the T-shape position is outside gland (13), axle at depression bar (12) is with spring, spring is in the big inner chamber of diameter of gland (13), the diameter of spring makes spring prop up the step in the gland (13) greater than the diameter of the less inner chamber of gland (13).
Preferred the right fixed head 7(2) is connected by four M10 bolting with the depression bar 12 of the pull bar 9 of two symmetrical distributions, two symmetrical distributions respectively.
(d) bidirectional force sensor one end and the right fixed head 7(2) to fixedly connected, the bidirectional force sensor other end is connected with frame.
Preferably (a) pressure rings connects with left-handed bolt, pad and the nut of (b) loading cover by one group of M12; (b) loading cover revolves bolt, pad and nut with (c) elastic parts by the dextrorotation of one group of M12 and connects; (c) elastic parts and (d) bidirectional force sensor by the dextrorotation of one group of M12 revolve bolt, nut connects; Load cover and be connected with the pressure rings center by single left-handed nut 4, load cover and be connected by dextrorotation double-screw bolt 6 with Flexible element, elastic parts is connected by double-screw bolt with the bidirectional force sensor, and sensor is connected with frame by double-screw bolt.
Pressure rings can produce axial slip with housing, to the bearing outer ring transmission pretightning force of different matching forms; Load cover and can regulate the pretightning force size and Orientation by rotation six ribs cover 5; Flexible element realizes that by two groups of compression spring components that are symmetrically distributed and extension spring assembly bearing keeps the pretightning force constant magnitude under different matching forms; The bidirectional force sensor can show the pretightning force size and Orientation constantly.
The present invention has partly realized bearing group is carried out two-way quantitative constant voltage pretension by elastic parts.When electric mainshaft bearing generation axial displacement, the axial pre tightening force that can guarantee bearing group is constant, guarantee running accuracy and the rigidity of electric mainshaft bearing when rotating at a high speed, can quantitatively regulate the pretightning force size simultaneously, avoided the living heat of bearing to cause the stuck phenomenon of burning too greatly.Progress and the service life of electric main shaft operation have been improved.
Description of drawings:
The general structure schematic diagram of Fig. 1 electric spindle angular contact ball bearing bidirectional pressure regulating pre-tightening apparatus of the present invention.
Embodiment 1:
Describe below in conjunction with accompanying drawing, but the invention is not restricted to following examples.
This device is made up of four parts, comprising: (a) pressure rings, (b) load cover, (c) elastic parts, (d) bidirectional force sensor;
(a) pressure rings connects with left-handed bolt, pad and the nut of (b) loading cover by one group of M12; (b) loading cover revolves bolt, pad and nut with (c) Flexible element by the dextrorotation of one group of M12 and connects; (c) Flexible element and (d) bidirectional force sensor by the dextrorotation of one group of M12 revolve bolt, nut connects;
(a) pressure rings is formed and is comprised bearing outer ring support set (1), bearing seal ring (2), thrust ring (3); Can axial slip between bearing outer ring support set (1) and the bearing block, bearing outer ring support set (1) is enclosed within the outside of electric spindle angular contact ball bearing, one end of bearing outer ring support set (1) has corner edges, corner edges is withstood angular contact ball bearing, the other end of angular contact ball bearing is bearing seal ring (2) in bearing outer ring support set (1) inherence, chamber, bearing seal ring (2) next-door neighbour's thrust ring (3) (just, along electric main shaft axially, bearing outer ring support set (1) props up angular contact ball bearing, angular contact ball bearing and bearing seal ring (2) are clipped between the corner edges and thrust ring (3) of bearing outer ring support set (1)), thrust ring (3) is fixedlyed connected with bearing outer ring support set (1) simultaneously, bearing outer ring support set (1) is fixedly connected into a chamber, and the end of electric main shaft is placed in this chamber.Bearing outer ring support set 1, thrust ring 3 connect by the bolt of 6 M6 of circle distribution.
(b) load the composition that overlaps and comprise left-handed bolt (4), six rib covers (5) and the dextrorotation bolt (6) that connects successively; Left-handed bolt (4) is fixedlyed connected with thrust ring (3);
(c) two fixed head 7(1 about the composition of elastic parts comprises) 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 head 7(1 of fixedlying connected with dextrorotation bolt (6)) fixedlys connected with two glands 13 with two extension spring covers (8); Two extension spring covers (8) and two glands (13) are tetragonal prism and distribute, 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; Extension spring cover (8) is the straight tube of end perforate, and the inner chamber of gland (13) is the tube with step of two different inner diameters, and the inner chamber of gland (13) is at close left side fixed head 7(1) the internal diameter of part little;
Left side fixed head 7(2) fixedlys connected with two pull bars (9), two depression bars (12), pull bar (9) is T type pull bar, the T-shape position of two pull bars lays respectively in two extension spring covers (8) chamber, in extension spring cover (8) chamber, all be with a spring on the axle of two pull bars (9), realize the compression of spring by pull bar (9); Depression bar (12) is T type depression bar, the axle head of two depression bars is positioned at the inner chamber of gland (13), the T-shape position is outside gland (13), axle at depression bar (12) is with spring, spring is in the big inner chamber of diameter of gland (13), the diameter of spring makes spring prop up the step in the gland (13) greater than the diameter of the less inner chamber of gland (13).
The right fixed head 7(2) is connected by four M10 bolting with the depression bar 12 of the pull bar 9 of two symmetrical distributions, two symmetrical distributions respectively.
(d) bidirectional force sensor two ends have the screwed hole of M12, wherein an end and the right fixed head 7(2) to fixedly connected, the bidirectional force sensor other end is connected with frame.
Load cover and be connected with the pressure rings center by single left-handed nut 4, load cover and be connected by dextrorotation double-screw bolt 6 with Flexible element, Flexible element is connected by double-screw bolt with the bidirectional force sensor.
Diagonal angle contact ball bearing group applies need axially draw pretension.According to method of attachment shown in Figure 1, rotate six ribs cover 5 further pressure rings and Flexible element, produce and axially draw pretension, proofread according to the value of thrust size that sensor 11 shows, bearing is carried out accurate pretension.
At this moment, (a) pressure rings middle (center) bearing outer ring support set 1, fastens bearing outer ring and drives bearing outer ring and move to axle head, produces axial slip between outer ring support set 1 and the bearing support block.Bearing seal ring 2, thrust ring 3 produce axial displacement to the right synchronously.Depression bar 12 and pressure sleeve 13 are from not bearing axial force in the Flexible element, pull bar 9 transmits axial tension with extension spring cover 8 with one group of spring compression, and in electric spindle operation, bearing outer ring produces certain axial displacement, but compression spring keeps pretightning force constant by the displacement of certain distortion compensating axial.
Embodiment 2:
Describe below in conjunction with accompanying drawing.
Diagonal angle contact ball bearing group applies needs axially to press pretension.According to method of attachment shown in Figure 1, rotate six ribs cover 5 further pressure rings and Flexible element, produce and axially press pretension, proofread according to the force value size that sensor 11 shows, bearing is carried out accurate pretension.
At this moment, (a) pressure rings middle (center) bearing bearing seal ring 2 withstands bearing outer ring and drives bearing outer ring and moves away from axle head, produces axial slip between outer ring support set 1 and the bearing support block.Bearing seal ring 2, thrust ring 3 and outer ring support set 1 produce axial displacement left synchronously.Pull bar 9 overlaps the 8 close axial forces of not bearing with extension spring in the Flexible element, and depression bar 12 transmits axial compressive force with compression spring sleeve 13 with one group of spring compression.The same example, in electric spindle operation, bearing outer ring produces certain axial displacement, but compression spring keeps pretightning force constant by the displacement of certain distortion compensating axial.
Claims (7)
1. an electric spindle angular contact ball bearing bidirectional pressure regulating pre-tightening apparatus is characterized in that this device comprises four parts: (a) pressure rings, (b) loading cover, (c) elastic parts, (d) bidirectional force sensor;
(a) pressure rings is formed and is comprised bearing outer ring support set (1), bearing seal ring (2), thrust ring (3); Can axial slip between bearing outer ring support set (1) and the bearing block, bearing outer ring support set (1) is enclosed within the outside of electric spindle angular contact ball bearing, one end of bearing outer ring support set (1) has corner edges, corner edges is withstood angular contact ball bearing, the other end of angular contact ball bearing is bearing seal ring (2) in bearing outer ring support set (1) inherence, chamber, bearing seal ring (2) next-door neighbour thrust ring (3), thrust ring (3) is fixedlyed connected with bearing outer ring support set (1) simultaneously;
(b) load the composition that overlaps and comprise left-handed bolt (4), six rib covers (5) and the dextrorotation bolt (6) that connects successively; Left-handed bolt (4) is fixedlyed connected with thrust ring (3);
(c) two fixed head 7(1 about the composition of elastic parts comprises) 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 head 7(1 of fixedlying connected with dextrorotation bolt (6)) fixedlys connected with two glands 13 with two extension spring covers (8); Two extension spring covers (8) and two glands (13) are tetragonal prism and distribute, 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; Extension spring cover (8) is the straight tube of end perforate, and the inner chamber of gland (13) is the tube with step of two different inner diameters, and the inner chamber of gland (13) is at close left side fixed head 7(1) the internal diameter of part little;
Left side fixed head 7(2) fixedlys connected with two pull bars (9), two depression bars (12), pull bar (9) is T type pull bar, the T-shape position of two pull bars lays respectively in two extension spring covers (8) chamber, in extension spring cover (8) chamber, all be with a spring on the axle of two pull bars (9), realize the compression of spring by pull bar (9); Depression bar (12) is T type depression bar, the axle head of two depression bars is positioned at the inner chamber of gland (13), the T-shape position is outside gland (13), axle at depression bar (12) is with spring, spring is in the big inner chamber of diameter of gland (13), the diameter of spring makes spring prop up the step in the gland (13) greater than the diameter of the less inner chamber of gland (13).
2. according to the device of claim 1, it is characterized in that bearing outer ring support set (1) is fixedly connected into a chamber with thrust ring 3, and the end of electric main shaft is placed in this chamber.
3. according to the device of claim 1, it is characterized in that bearing outer ring support set (1), thrust ring (3) connect 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 head 7(2) be connected by four M10 bolting with the depression bar (12) of the pull bar (9) of two symmetrical distributions, two symmetrical distributions respectively.
5. according to the device of claim 1, it is characterized in that (a) pressure rings connects with left-handed bolt, pad and the nut of (b) loading cover by one group of M12; (b) loading cover revolves bolt, pad and nut with (c) elastic parts by the dextrorotation of one group of M12 and connects.
6. according to the device of claim 1, it is characterized in that, (c) elastic parts and (d) bidirectional force sensor by the dextrorotation of one group of M12 revolve bolt, nut connects.
7. according to the device of claim 1, it is characterized in that, load cover and be connected with the pressure rings center by single left-handed nut (4), load cover and be connected by dextrorotation double-screw bolt (6) with Flexible element, elastic parts is connected by double-screw bolt with the bidirectional force sensor, and sensor is connected with frame by double-screw bolt.
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 |
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| 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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| CN103182534A true CN103182534A (en) | 2013-07-03 |
| CN103182534B 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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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104493512A (en) * | 2014-12-19 | 2015-04-08 | 无锡大龙马数控机床制造有限责任公司 | Base table of machining center |
| CN105014104A (en) * | 2015-06-24 | 2015-11-04 | 上海大学 | External-adjustable constant-pressure pre-tightening device for motorized spindle |
| 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 |
| CN109945767A (en) * | 2019-03-15 | 2019-06-28 | 湖北三江航天万峰科技发展有限公司 | A kind of positioning and orientation system indexing mechanism angular contact bearing pretightning force adjusting method |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104493512A (en) * | 2014-12-19 | 2015-04-08 | 无锡大龙马数控机床制造有限责任公司 | Base table of machining center |
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| 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 |
| CN109945767A (en) * | 2019-03-15 | 2019-06-28 | 湖北三江航天万峰科技发展有限公司 | A kind of positioning and orientation system indexing mechanism angular contact bearing pretightning force adjusting method |
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| CN103182534B (en) | 2015-03-25 |
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