CN100382919C - Automatic centering central frame - Google Patents
Automatic centering central frame Download PDFInfo
- Publication number
- CN100382919C CN100382919C CNB2006101247948A CN200610124794A CN100382919C CN 100382919 C CN100382919 C CN 100382919C CN B2006101247948 A CNB2006101247948 A CN B2006101247948A CN 200610124794 A CN200610124794 A CN 200610124794A CN 100382919 C CN100382919 C CN 100382919C
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- connecting rod
- fulcrum post
- depression bar
- sector gear
- pressed pole
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Abstract
The automatically centering central frame consists of support, left large sector gear, left small sector gear, left pressure lever, right pressure lever, roller, upper rotary pin, right small sector gear, right large sector gear, link rod, sliding block, runner block, lower pressure lever slide rail, lower pressure lever and lower rotary pin. It is one opened structure and realizes three bearing point automatic centering by means of the block-link rod mechanism to drive the sector gear mechanism. The complete linkage of the three bearing points can center shaft work piece of different diameter reliably in the same rotary center. The present invention has the features of reliable design, simple structure, wide application range, etc and is especially suitable for automatic control of central frame by means of pneumatic, hydraulic or other modes.
Description
Technical field
The present invention relates to a kind of lathe folder accessory, particularly relate to a kind of self-centering centre frame.
Background technology
In mechanical manufacturing field, when elongated shaft-like workpiece is carried out turning or grinding, usually use centre frame to come supporting workpiece, to improve rigidity, guarantee machining accuracy.Centre frame generally adopts the principle of three-point circle to come the support elongated shaft-like workpiece.Three strong points of existing machine tool centre frame generally can not link, shaft-like workpiece for different-diameter needs the manual position of adjusting respectively at 3, so that 3 definite centers of circle are positioned on the centre of gyration of lathe, as: Chinese utility model patent: " adjustable center frame " (ZL 200420027852.1) etc.This process often needs to use measurers such as dial gauge, scribing block, relies on operator's experience, through repeatedly adjusting, measure even load and unload loaded down with trivial details work such as centre frame repeatedly, just can achieve the goal.
For this reason, Chinese utility model patent: " lathe self-centering centre frame " (ZL200420041999.6) provides a kind of self-centering centre frame of 3 linkages.This centre frame adopts the general structure of folding up and down, and under the drive of end-face helical, interlock is felt relieved by three threaded centering parts.End-face helical drives rotation by gear-box.This structure is similar to scroll chuck commonly used on the lathe.This centre frame is because structures such as employing end-face helical, gear-box are comparatively complicated, to having relatively high expectations of processing and manufacturing.In addition, what this centre frame adopted is a kind of enclosed structure, for the dismounting workpiece, also needs artificial folding support body.
Summary of the invention
The purpose of this invention is to provide a kind of self-centering centre frame that overcomes above-mentioned defective, this self-centering centre frame has been realized the self-centering of three strong points, and can link fully by three strong points, the shaft-like workpiece of different-diameter is centered on the same centre of gyration reliably.
For achieving the above object, self-centering apparatus of the present invention comprises:
A kind of self-centering centre frame is characterized in that: the down-pressed pole slide rail is fixed on the middle part of support, and down-pressed pole is positioned on the down-pressed pole slide rail, and can slide up and down along the down-pressed pole slide rail; Runner block is installed on the down-pressed pole; Big sector gear in a left side and left connecting rod are connected to one, by the lower-left fulcrum post big sector gear in a left side and left connecting rod are connected on the support, right big sector gear and right connecting rod are connected to one, by the bottom right fulcrum post big sector gear in the right side and right connecting rod are connected on the support, big sector gear in a left side and left connecting rod can rotate around the lower-left fulcrum post, and right big sector gear and right connecting rod can rotate around the bottom right fulcrum post; Lower-left fulcrum post, the relative down-pressed pole slide rail of bottom right fulcrum post are arranged symmetrically on the support; One end of left side connecting rod and an end of right connecting rod pass through the lower-left fulcrum post respectively, the bottom right fulcrum post is rack-mount, and the other end of left connecting rod and the other end of right connecting rod are equipped with left slider, right slide block respectively; Runner block, left slider and right slide block that left slider, right slide block are positioned on the down-pressed pole can horizontally slip at runner block respectively; Left slider is connected with left connecting rod with pin, and right slide block is connected with right connecting rod with pin, and left slider and left connecting rod can relatively rotate around pin, and right slide block and right connecting rod can relatively rotate around pin; Little sector gear in a left side and left depression bar are connected to one, and left little sector gear and left depression bar are connected on the support by upper left fulcrum post, can rotate around upper left fulcrum post; Right little sector gear and right depression bar are connected to one, and right little sector gear and right depression bar are connected on the support 1 by upper right fulcrum post, can rotate around upper right fulcrum post; The left and right relative down-pressed pole slide rail of fulcrum post of going up is arranged symmetrically on the support; The top of left side depression bar, right depression bar and down-pressed pole is separately installed with left and right, bottom roller, is used for supporting workpiece; The equal in length of above-mentioned left and right connecting rod, the equal in length of left and right depression bar, left and right length of connecting rod is the twice of left and right depression bar length; Big sector gear in a described left side and left little sector gear engagement, right big sector gear and right little sector gear engagement constitute gear pair, and gearratio is 1: 2; When left and right depression bar was in level, roller center on the left and right depression bar and the roller center on the down-pressed pole converged to a bit.
The present invention can adopt left and right big belt wheel, left and right small pulley and driving-belt to replace left and right big sector gear and left and right little sector gear; Perhaps adopt left and right hinge wheel, left and right minor sprocket and chain to replace left and right big sector gear and left and right little sector gear.
The present invention drives fan-shaped gear mechanism owing to adopt open architecture by sliding-block linkage, and left and right depression bar gets final product lifting workpiece when being opened to a certain degree, and is easy and simple to handle, is particularly suited for adopting mode such as pneumatic, hydraulic pressure to realize the automatic control of centre frame.The present invention compares with existing centre frame has characteristics such as principle is reliable, simple in structure, easy to operate, applied widely.
Description of drawings
Accompanying drawing 1 is a structural representation of the present invention
Accompanying drawing 2 is opened the structural representation when supporting certain than large-diameter revolving body for three depression bar points of the present invention
Accompanying drawing 3 is employing band of the present invention transmission or chaindriven structural representation
The specific embodiment
As shown in Figure 1, down-pressed pole slide rail 12 is fixed on the middle part of support 1, and down-pressed pole 9 is positioned on the down-pressed pole slide rail 12, and can slide up and down along down-pressed pole slide rail 12.Runner block 11 is installed on the down-pressed pole 9.The big sector gear 2 in a left side is fixedlyed connected with left connecting rod 8, be connected on the support 1 by lower-left fulcrum post 7, right big sector gear 2 ' is fixedlyed connected with right connecting rod 8 ', is connected on the support 1 by bottom right fulcrum post 7 ', can be respectively around left and right 7, the 7 ' rotation of shipping and reselling on another market next time.Lower-left fulcrum post 7, bottom right fulcrum post 7 ' relative down-pressed pole slide rail 12 are arranged symmetrically on the support 1.One end of left side connecting rod 8, right connecting rod 8 ' is installed on the support 1 by lower-left fulcrum post 7, bottom right fulcrum post 7 ' respectively, and its other end is respectively equipped with left slider 10, right slide block 10 '.Left slider 10, right slide block 10 ' are positioned at runner block 11 on the down-pressed pole 9, and can horizontally slip.Slide block is connected by pin with connecting rod, can relatively rotate.
The little sector gear 3 in a left side is fixedlyed connected with left depression bar 4, is connected on the support 1 by upper left fulcrum post 6, can rotate around upper left fulcrum post 6.Right little sector gear 3 ' is fixedlyed connected with right depression bar 4 ', is connected on the support 1 by upper right fulcrum post 6 ', can rotate around upper right fulcrum post 6 '; Left and right fulcrum post 6,6 ' the relative down-pressed pole slide rail 12 of going up is arranged symmetrically on the support 1.
That the top of left side depression bar 4, right depression bar 4 ' and down-pressed pole 9 is separately installed with is left and right, bottom roller 5a, 5b and 5c, is used for supporting workpiece.
Left and right connecting rod 8,8 ' equal in length are made as L
1, left and right depression bar 4,4 ' equal in length are made as L
2, L
1=2L
2Be that left and right connecting rod 8,8 ' length are the twices of left and right depression bar 4,4 ' length; Big sector gear 2 in a left side and left little sector gear 3, right big sector gear 2 ' and right little sector gear 3 ' mesh respectively, constitute gear pair, and gearratio is 1: 2; When left and right depression bar 4,4 ' was in level, roller 5a, 5b and 5c center on 3 depression bars converged to a bit.
As shown in Figure 3, above-mentioned said left and right tooth wheel set, it is left and right big sector gear 2,2 ' and left and right little sector gear 3,3 ' available gear ratios be 1: 2 band transmission or chain transmission, be big belt wheel or sprocket wheel 13,13 ', small pulley or sprocket wheel 14,14 ', and the function of driving-belt or chain 15,15 ' replacement left and right tooth wheel set.
As shown in Figure 3: down-pressed pole slide rail 12 is fixed on the middle part of support 1, and down-pressed pole 9 is positioned on the down-pressed pole slide rail 12, and can slide up and down along down-pressed pole slide rail 12; Runner block 11 is installed on the down-pressed pole 9; Big belt wheel in a left side or sprocket wheel 14 are connected with left connecting rod 8, are connected on the support 1 by lower-left fulcrum post 7, and right big belt wheel or sprocket wheel 14 ' are connected with right connecting rod 8 ', are connected on the support 1 by bottom right fulcrum post 7 ', can be respectively around left and right 7, the 7 ' rotation of shipping and reselling on another market next time; Lower-left fulcrum post 7, bottom right fulcrum post 7 ' relative down-pressed pole slide rail 12 are arranged symmetrically on the support 1; One end of left side connecting rod 8, right connecting rod 8 ' is installed on the support 1 by lower-left fulcrum post 7, bottom right fulcrum post 7 ' respectively, and its other end is respectively equipped with left slider 10, right slide block 10 '; Left slider 10, right slide block 10 ' are positioned at runner block 11 on the down-pressed pole 9, and can horizontally slip; Slide block is connected by pin with connecting rod, can relatively rotate; Left side small pulley or sprocket wheel 13 are connected with left depression bar 4, are connected on the support 1 by upper left fulcrum post 6, can rotate around upper left fulcrum post 6; Right small pulley or sprocket wheel 13 ' are connected with right depression bar 4 ', are connected on the support 1 by upper right fulcrum post 6 ', can rotate around upper right fulcrum post 6 '; Left and right fulcrum post 6,6 ' the relative down-pressed pole slide rail 12 of going up is arranged symmetrically on the support 1; Driving-belt or chain 15,15 ' respectively with left and right big belt wheel or sprocket wheel 14,14 ', left and right small pulley or sprocket wheel 13,13 ' connects; That the top of left side depression bar 4, right depression bar 4 ' and down-pressed pole 9 is separately installed with is left and right, bottom roller 5a, 5b and 5c, is used for supporting workpiece.
Above-mentioned left and right connecting rod 8,8 ' equal in length are made as L
1, left and right depression bar 4,4 ' equal in length are made as L
2, left and right connecting rod 8,8 ' length are the twices of left and right depression bar (4,4 ') length, L
1=2L
2Described big belt wheel or sprocket wheel (13,13 '), small pulley or sprocket wheel 14,14 ', and driving-belt or chain 15,15 ' formation band transmission or chain transmission, its gearratio is 1: 2; When left and right depression bar was in level, the roller center on 3 depression bars converged to a bit.
During holding workpiece, adopt manually or pneumatic mode, down-pressed pole is moved up and down, making the roller center on the down-pressed pole is R to the distance of the centre of location
1Driving left and right connecting rod by runner block and slide block turns to and becomes angle α with horizontal line, big sector gear drives little sector gear and left and right sides depression bar rotates around last fulcrum post, compare with original state (being that left and right sides depression bar is in level) and to turn over an angle θ, the roller center on the depression bar of the left and right sides and the distance of the centre of location are R
2
By geometrical relationship, when down-pressed pole is in the optional position, have:
R
1＝L
1·sinα，R
2＝2·L
2·sin(θ/2)
Again because among the present invention, the gearratio of big or small sector gear is 1: 2, has:
θ=2 α, and: L
1=2L
2
So R is necessarily arranged
1=R
2
Thereby the present invention has realized the shaft-like workpiece of different-diameter is positioned on the same centre of gyration.
Claims (2)
1. self-centering centre frame, it is characterized in that: down-pressed pole slide rail (12) is fixed on the middle part of support (1), and down-pressed pole (9) is positioned on the down-pressed pole slide rail (12), and can slide up and down along down-pressed pole slide rail (12); Runner block (11) is installed on the down-pressed pole (9); Big sector gear (2) in a left side and left connecting rod (8) are connected to one, by lower-left fulcrum post (7) big sector gear in a left side (2) and left connecting rod (8) are connected on the support (1), right big sector gear (2 ') and right connecting rod (8 ') are connected to one, by bottom right fulcrum post (7 ') big sector gear in the right side (2 ') and right connecting rod (8 ') are connected on the support (1), big sector gear (2) in a left side and left connecting rod (8) can rotate around lower-left fulcrum post (7), and right big sector gear (2 ') and right connecting rod (8 ') can rotate around bottom right fulcrum post (7 '); Lower-left fulcrum post (7), bottom right fulcrum post (7 ') down-pressed pole slide rail (12) relatively are arranged symmetrically on the support (1); One end of left side connecting rod (8) and an end of right connecting rod (8 ') are installed on the support (1) by lower-left fulcrum post (7), bottom right fulcrum post (7 ') respectively, and the other end of left connecting rod (8) and the other end of right connecting rod (8 ') are equipped with left slider (10), right slide block (10 ') respectively; Runner block (11), left slider (10) and right slide block (10 ') that left slider (10), right slide block (10 ') are positioned on the down-pressed pole (9) can horizontally slip at runner block (11) respectively; Left slider (10) is connected with left connecting rod (8) with pin, and right slide block (10 ') is connected with right connecting rod (8 ') with pin, and left slider (10) can relatively rotate around pin with left connecting rod (8), and right slide block (10 ') and right connecting rod (8 ') can relatively rotate around pin; A left side little sector gear (3) and left depression bar (4) are connected to one, and left little sector gear (3) and left depression bar (4) are connected on the support (1) by upper left fulcrum post (6), can rotate around upper left fulcrum post (6); Right little sector gear (3 ') and right depression bar (4 ') are connected to one, and right little sector gear (3 ') and right depression bar (4 ') are connected on the support 1 by upper right fulcrum post (6 '), can rotate around upper right fulcrum post (6 '); The left and right relative down-pressed pole slide rail (12) of fulcrum post (6,6 ') of going up is arranged symmetrically on the support (1); The top of left side depression bar (4), right depression bar (4 ') and down-pressed pole (9) is separately installed with left and right, bottom roller (5a, 5b and 5c), is used for supporting workpiece;
The equal in length of above-mentioned left and right connecting rod (8,8 '), the equal in length of left and right depression bar (4,4 '), left and right connecting rod (8,8 ') length is the twice of left and right depression bar (4,4 ') length; Big sector gear in a described left side and left little sector gear engagement, right big sector gear and right little sector gear engagement constitute gear pair, and gearratio is 1: 2; When left and right depression bar was in level, the roller center on roller center on the left and right depression bar (4,4 ') and the down-pressed pole (9) converged to a bit.
2. self-centering centre frame, it is characterized in that: down-pressed pole slide rail (12) is fixed on the middle part of support (1), and down-pressed pole (9) is positioned on the down-pressed pole slide rail (12), and can slide up and down along down-pressed pole slide rail (12); Runner block (11) is installed on the down-pressed pole (9); Big belt wheel in a left side or left hinge wheel (14) are connected with left connecting rod (8), by lower-left fulcrum post (7) with big belt wheel in a left side (14) and left connecting rod (8), or left hinge wheel (14) and left connecting rod (8) are connected on the support (1), right big belt wheel or right hinge wheel (14 ') are connected with right connecting rod (8 '), by bottom right fulcrum post (7 ') with big belt wheel in the right side (14 ') and right connecting rod (8 '), or right hinge wheel (14 ') and right connecting rod (8 ') are connected on the support (1), big belt wheel (14) in a left side and left connecting rod (8), or left hinge wheel (14) and left connecting rod (8) can rotate around lower-left fulcrum post (7), right big belt wheel (14 ') and right connecting rod (8 '), or right hinge wheel (14 ') and right connecting rod (8 ') can rotate around bottom right fulcrum post (7 '); Lower-left fulcrum post (7), bottom right fulcrum post (7 ') down-pressed pole slide rail (12) relatively are arranged symmetrically on the support (1); One end of left side connecting rod (8), an end of right connecting rod (8 ') are installed on the support (1) by lower-left fulcrum post (7), bottom right fulcrum post (7 ') respectively, and the other end of left connecting rod (8), the other end of right connecting rod (8 ') are respectively equipped with left slider (10), right slide block (10 '); Runner block (11), left slider (10) and right slide block (10 ') that left slider (10), right slide block (10 ') are positioned on the down-pressed pole (9) can horizontally slip at runner block (11) respectively; Left slider (10) is connected with left connecting rod (8) with pin, and right slide block (10 ') is connected with right connecting rod (8 ') with pin, and left slider (10) can relatively rotate with left connecting rod (8), and right slide block (10 ') and right connecting rod (8 ') can relatively rotate; Left side small pulley or left minor sprocket (13) and left depression bar (4) connect as one, left small pulley and left depression bar (4), or left minor sprocket (13) and left depression bar (4) be connected on the support (1) by upper left fulcrum post (6), can rotate around upper left fulcrum post (6); Right small pulley or right minor sprocket (13 ') are connected with right depression bar (4 '), right small pulley and right depression bar (4 '), or right minor sprocket (13 ') and right depression bar (4 ') be connected on the support 1 by upper right fulcrum post (6 '), can rotate around upper right fulcrum post (6 '); The left and right relative down-pressed pole slide rail (12) of fulcrum post (6,6 ') of going up is arranged symmetrically on the support (1); Left and right two driving-belts respectively with left and right big belt wheel, left and right small pulley connect or left and right two chains (15,15 ') respectively with left and right hinge wheel (14,14 '), left and right minor sprocket (13,13 ') connects; The top of left side depression bar (4), right depression bar (4 ') and down-pressed pole (9) is separately installed with left and right, bottom roller (5a, 5b and 5c), is used for supporting workpiece;
The equal in length of above-mentioned left and right connecting rod (8,8 '), the equal in length of left and right depression bar (4,4 '), left and right connecting rod (8,8 ') length is the twice of left and right depression bar (4,4 ') length; By described left and right big belt wheel, left and right small pulley and two driving-belts constitute the band transmission or by described left and right hinge wheel (13,13 '), left and right minor sprocket (14,14 ') and two chains (15,15 ') constitute the chain transmission, and its gearratio is 1: 2; When left and right depression bar was in level, the roller center on roller center on the left and right depression bar (4,4 ') and the down-pressed pole (9) converged to a bit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006101247948A CN100382919C (en) | 2006-10-17 | 2006-10-17 | Automatic centering central frame |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006101247948A CN100382919C (en) | 2006-10-17 | 2006-10-17 | Automatic centering central frame |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1943932A CN1943932A (en) | 2007-04-11 |
| CN100382919C true CN100382919C (en) | 2008-04-23 |
Family
ID=38043706
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006101247948A Expired - Fee Related CN100382919C (en) | 2006-10-17 | 2006-10-17 | Automatic centering central frame |
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| Country | Link |
|---|---|
| CN (1) | CN100382919C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI500472B (en) * | 2013-07-16 | 2015-09-21 | Ind Tech Res Inst | An auto-centering apparatus of a steady rest |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101284359B (en) * | 2008-05-23 | 2010-04-07 | 安东石油技术（集团）有限公司 | Homeostasis center supporting mechanism |
| EP2505303B1 (en) * | 2011-03-29 | 2014-05-07 | SMW-AUTOBLOK Spannsysteme GmbH | Stationary support |
| CN103612138B (en) * | 2013-11-26 | 2016-01-20 | 江苏科技大学 | The fixture flexible positioning method of connecting rod cap, bearing cap class part processing and device |
| CN110449625B (en) * | 2019-08-23 | 2021-07-13 | 惠州捷耀数控机械有限公司 | Machining center for machining long shaft |
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| CN2734402Y (en) * | 2004-06-08 | 2005-10-19 | 张农春 | Adjustable center frame |
| WO2005097404A1 (en) * | 2004-04-08 | 2005-10-20 | Maus S.P.A. | Method and device for centring semi-finished parts which are to undergo mechanical machining |
| CN2822834Y (en) * | 2005-11-08 | 2006-10-04 | 天水星火机床有限责任公司 | Horizontal lathe central frame |
| CN200967089Y (en) * | 2006-10-17 | 2007-10-31 | 华中科技大学 | Self-centering center frame |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05212644A (en) * | 1992-01-31 | 1993-08-24 | Kawasaki Heavy Ind Ltd | Tool positioning device |
| CN2205281Y (en) * | 1994-05-12 | 1995-08-16 | 欧阳亮 | Rapid center frame |
| DE20119931U1 (en) * | 2001-12-08 | 2002-03-28 | H. Richter Vorrichtungsbau GmbH, 30855 Langenhagen | Fast centering bezel |
| CN2547441Y (en) * | 2002-06-23 | 2003-04-30 | 青岛港务局 | Lathe centre frame |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI500472B (en) * | 2013-07-16 | 2015-09-21 | Ind Tech Res Inst | An auto-centering apparatus of a steady rest |
| US9144868B2 (en) | 2013-07-16 | 2015-09-29 | Industrial Technology Research Institute | Auto-centering apparatus of a steady rest |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1943932A (en) | 2007-04-11 |
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Assignee: Ningbo Zhenyu Mould Co., Ltd. Assignor: Huazhong University of Science and Technology Contract fulfillment period: 2008.12.1 to 2014.12.1 contract change Contract record no.: 2008330002693 Denomination of invention: Automatic centering central frame Granted publication date: 20080423 License type: Exclusive license Record date: 20081216 |
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Free format text: EXCLUSIVE LICENSE; TIME LIMIT OF IMPLEMENTING CONTACT: 2008.12.1 TO 2014.12.1; CHANGE OF CONTRACT Name of requester: NINGBO ZHENYU MOLDS CO., LTD. Effective date: 20081216 |
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