CN102728860B - Movable center mechanism for formed grinding machine - Google Patents
Movable center mechanism for formed grinding machine Download PDFInfo
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- CN102728860B CN102728860B CN201210073030.6A CN201210073030A CN102728860B CN 102728860 B CN102728860 B CN 102728860B CN 201210073030 A CN201210073030 A CN 201210073030A CN 102728860 B CN102728860 B CN 102728860B
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- center
- sleeve
- positioning sleeve
- grinding machine
- dish
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Abstract
The invention relates to a movable center mechanism for a formed grinding machine. According to the movable center mechanism, the defects that the processing difficulty is increased and the processing cost is increased because a jackscrew sleeve is in surface contact with a bush in the prior art are overcome. An axial round hole is formed in a bracket; a center positioning sleeve is arranged in the axial round hole; a center sleeve is inserted into the center positioning sleeve; a center is arranged at one end part of the center sleeve; a center bolt is arranged at the middle of the center sleeve; one end of the center bolt is fixedly screwed with the center; the other end of the center bolt extends to the center and then is connected to the outside of a disk; a spring is sleeved on the center spring; and a plurality of steel beads are arranged between the center positioning sleeve and the inner wall of the axial round hole and are connected by a steel bead retainer in series. The center positioning sleeve is in rolling friction in the moving process, so that the resistance in moving is reduced and higher sensitivity is obtained; and the center positioning sleeve is in point contact with the axial round hole, so that the processing difficulty is reduced and the production cost is also reduced.
Description
Technical field
The present invention relates to a kind of machine tool accessories, especially a kind of precision is higher, and molded gear grinding machine movable center mechanism that can accurate adjustment thrust.
Background technology
Tip mechanism is clamping part important in machine tooling, the product that some length of machine tooling are larger, the chuck of lathe and tip mechanism will be used in conjunction with, and the centre of gyration that tip mechanism can be guaranteed workpiece on the axis of rotation in extra bed chuck, improves the precision of processing all the time.At present, conventional lathe tip mechanism is at a set of radial bearing of top interior assembling and a set of thrust bearing, and radial bearing, for supporting top rotation, promotes bearing for bearing the axial force of the top work of lathe.The top main dependence bearing of this type of lathe, the top and machining accuracy of top main body and three's reasonable assembling thereof guarantee, owing to affecting, the factor of the top precision of lathe is many, and rigging error is large, so positioning precision is poor.Conventional lathe tip mechanism can not be adjusted top center after location completes in addition.
Patent Office of the People's Republic of China discloses a CN102039427A document on May 4th, 2011, name is called movable center mechanism of gear grinding machine, comprise top slide and top, described top slide top is fixed with end cap, top slide inside is provided with lead moving up and down and top, and for connecting lead and top jackscrew cover box blind rivet, described lead outside is disposed with guide pin bushing and spring, lead below is provided with jackscrew cover, described jackscrew cover downside is provided with jackscrew, jackscrew cover upper inside is provided with blind rivet, and this blind rivet downside is provided with top.Between the jackscrew cover of this tip mechanism and lining for face contacts, the not higher precision of movement of jackscrew cover, therefore for face, contact has just proposed higher requirement, the requirement on machining accuracy of the outer surface of jackscrew cover and the inner surface of lining is higher, but the area of contact is larger, guarantee that higher ratio of precision is more difficult, cause processing cost higher, lead needs guide pin bushing to lead in moving process, but the length of guide pin bushing is longer, limited the distance that lead moves, make the top displacement of tip mechanism, make whole tip mechanism can not adjust top thrust, between top and jackscrew cover in this tip mechanism, it is taper fit, therefore inconvenient to the top adjustment of carrying out radially with jackscrew.
Summary of the invention
The invention solves in prior art between jackscrew cover and lining as face contacts, cause difficulty of processing to strengthen, the defect that processing cost increases, a kind of molded gear grinding machine movable center mechanism is provided, the appearance of top positioning sleeve is that point contacts with overcoat, top movement is rolling friction, has reduced difficulty of processing, has also saved processing cost.
It is longer that the present invention has also solved in prior art the length of guide pin bushing, define top displacement, be inconvenient to adjust the defect of top thrust, a kind of molded gear grinding machine movable center mechanism is provided, saved guide pin bushing, make top displacement not be subject to the restriction of guide pin bushing length, top displacement is limited by approach switch, and top thrust just can be adjusted in the position that changes approach switch.
It is cone match that the present invention has also solved between top and jackscrew cover of the prior art, cannot be to top defect of carrying out independent radiai adjustment, a kind of molded gear grinding machine movable center mechanism is provided, thereby by regulating center sleeve to regulate top radial position, cannot be to the top problem of adjusting separately of carrying out thereby avoid.
The technical solution adopted for the present invention to solve the technical problems is: a kind of molded gear grinding machine movable center mechanism, comprise support, on support, be provided with axial circular hole, axially the two ends of circular hole be respectively arranged with connect before top dish and top after connect dish, it is characterized in that being provided with in axial circular hole reaching before top and connect the top positioning sleeve outside dish, in top positioning sleeve, be inserted with center sleeve, one end of center sleeve is provided with top, the middle part of center sleeve is provided with top bolt, one end of top bolt and top be spirally connected fixing, the other end of top bolt reaches after top and connects outside dish, on top bolt, be equipped with spring, the two ends of spring respectively with the other end of center sleeve and top after connect dish inner surface contact, between top positioning sleeve and axial circular-hole internal-wall, be provided with some steel balls, steel ball is connected in series by steel ball retainer.Top and center sleeve fixes, top tail end and top bolt bolt, center sleeve is inserted in top positioning sleeve, center sleeve and top positioning sleeve are into a single integrated structure, top positioning sleeve outer setting has steel ball, make top positioning sleeve in moving process, bear rolling friction, frictional resistance is little, and the sensitivity of tip mechanism is higher; Steel ball makes between the axial circular-hole internal-wall of top positioning sleeve and support, for some contact, to have reduced the difficulty of processing, and has also reduced production cost; Steel ball is connected in series by steel ball retainer, defines the distance between steel ball, guarantees the distance between steel ball and steel ball, and steel ball can not interfere in rolling process; Steel ball retainer can adopt various ways, such as adopting tubular structure, is provided with cylindrical hole on tube wall, or adopts the crooked steel band of many groups to be combined to form the netted steel ball retainer etc. of fixing steel ball; On top bolt, be equipped with spring, top movement, drives top positioning sleeve to move, Compress Spring, and spring provides top thrust, and the compression stress that changes spring just can change the thrust of top generation; Top bolt reaches after top and connects outside dish, makes can not bend in spring-compressed process, keeps the axis direction of compression, center sleeve displacement simultaneously also can by top bolt with top after connect and coordinating formation guide effect between dish.
As preferably, axially in circular hole, be fixed with dense ball set, steel ball is between dense ball set and top positioning sleeve; The length of steel ball retainer is less than the length of dense ball set, and length difference is at least greater than top displacement.In order to simplify the difficulty of processing of the axial inner hole wall of support, the interior fixedly dense ball set of axial bore, steel ball contacts with the inwall of dense ball set in dense ball set inside; Top positioning sleeve is in moving process, and steel ball retainer also can be moved, and steel ball retainer is less than the length of dense ball set, makes steel ball retainer have mobile space, can not produce sliding friction; The length of general steel ball retainer is at least 2/3rds of top positioning sleeve length.
As preferably, center sleeve comprises round plate and trunk portion, the perpendicular formation of round plate and trunk portion T shape structure, and trunk portion is inserted in top positioning sleeve, and the axis place of trunk portion is provided with bellmouth, top being inserted in bellmouth; Connecting portion between trunk portion and round plate is provided with bulge loop, between bulge loop and top positioning sleeve, is interference fits, is matched in clearance, and is provided with radial adjustment device in the end of top positioning sleeve between all the other positions of trunk portion and top positioning sleeve.Center sleeve round plate in moving process formation position limiting structure that can contact with dense ball set end, is matched in clearance between trunk portion and top positioning sleeve, and bulge loop is interference fits, convenient to top interplanting radiai adjustment, thereby completes top further location; Radial adjustment device can adopt various ways, such as the threaded inwall structure that is the conical surface, or adopts centrosymmetric a plurality of bolt structure.
As preferably, radial adjustment device is for to be radially arranged on the screw of top positioning sleeve end, and totally three, screw, is distributed in top positioning sleeve end.Screw regulates, and processes more convenient.
As preferably, the end of top positioning sleeve is provided with baffle ring, and the external diameter of baffle ring is greater than the diameter that connects the middle circular hole of dish before top.When ring defines top positioning sleeve, extend into the length in axial circular hole, also just define top displacement.
As preferably, the axis position of center sleeve is provided with through hole, and top bolt penetrates in through hole, and the middle part of the other end of center sleeve is provided with cavity, and spring is in cavity.Top bolt penetrates into through hole Nei， one end and reaches outside through hole, and the position of stretching out can clamp, and the top bolt of convenient rotation is convenient to be spirally connected fixingly with top, and cavity can carry out spacing to spring.
As preferably, the outside that connects dish after top is fixed with approach switch, and it is corresponding that the sensed position of approach switch and top bolt reach top Hou Jiepan end; Approach switch is connected with the displacement controller of support.Approach switch is used for limiting the displacement of top bolt, finally limits top displacement, is mainly the reduction length that changes spring, thereby changes top thrust.
As preferably, the distance connecing between the medial surface of dish and the end face of the round plate of center sleeve after top is greater than top displacement.Prevent approach switch also no the end face of the round plate of action and center sleeve with top after connect dish medial surface contact, make approach switch forfeiture effect.
As preferably, on support, be provided with screwed hole, in screwed hole, be rotary with holding screw, on the sidewall of the round plate of center sleeve, be provided with axial chute, the end of holding screw extend in chute.Holding screw coordinates with axial chute, can organize center sleeve to rotate around axis, but can not hinder center sleeve, does not move axially.
The invention has the beneficial effects as follows: top positioning sleeve for rolling friction, has reduced resistance when mobile in moving process, and sensitivity is higher; Between the outer wall of steel ball in top positioning sleeve, between steel ball and the axial circular-hole internal-wall of support, for some contact, prevent that between top positioning sleeve and axial circular hole, employing face contacts, reduced the difficulty of processing, also reduced production cost; After top, connect outside dish and be fixed with approach switch, approach switch matches with the end of top bolt, thereby regulates top axial displacement, the length of control spring compression, thus change top thrust.
Accompanying drawing explanation
Fig. 1 is a kind of structural representation of the present invention;
Fig. 2 is the structural representation of a kind of steel ball retainer of the present invention;
In figure: 1, top bolt, 2, connect dish after top, 3, axial circular hole, 4, round plate, 5, cavity, 6, holding screw, 7, chute, 8, bulge loop, 9, dense ball set, 10, support, 11, steel ball retainer, 12, steel ball, 13, top positioning sleeve, 14, connect dish before top, 15, center sleeve, 16, screw, 17, baffle ring, 18, trunk portion, 19, top, 20, spring, 21, approach switch, 22, cylindrical hole.
The specific embodiment
Below by specific embodiment, and by reference to the accompanying drawings, technical scheme of the present invention is described in further detail.
Embodiment: a kind of molded gear grinding machine movable center mechanism (referring to accompanying drawing 1), comprise support 10, support is arranged on the lathe of gear grinding machines, on support, be provided with axial circular hole 3, axially the two ends of circular hole be fixed with respectively connect before top dish 14 and top after connect dish 2, circular hole in the middle of the centre that connects dish before top is provided with, the centre that connects dish after top is provided with bolt hole.Axially in circular hole, be provided with the center sleeve 15 of T shape, center sleeve comprises round plate 4 and trunk portion 18, and round plate and trunk portion are perpendicular.The external diameter of round plate is suitable with the internal diameter of axial circular hole, on the outer peripheral face of round plate, be provided with axial chute 7, on the corresponding position of support, be provided with screwed hole, be rotary with holding screw 6 in screwed hole, the end of holding screw extend into restriction center sleeve in chute and rotates around axis.
Axially in circular hole, be fixed with dense ball set 9, one end of dense ball set with top before connect the medial surface butt of dish, the other end of dense ball set is corresponding with round plate, the length assurance center sleeve of dense ball set is having the enough length that moves axially in axial circular hole.The trunk portion outer cover of center sleeve is equipped with top positioning sleeve 13, is provided with some steel balls 12 between the appearance of top positioning sleeve and the inner surface of dense ball set, and steel ball passes through steel ball retainer 11(referring to accompanying drawing 2) serial connection.Steel ball retainer is cylinder-like structure, is provided with some cylindrical holes 22 radially on barrel, and steel ball is in cylindrical hole, and the barrel thickness of steel ball retainer is less than the diameter of steel ball.The length of steel ball retainer is less than the length of dense ball set, and length difference is greater than top displacement, the length of steel ball retainer is top displacement three times.The end of top positioning sleeve reaches before top and connects outside dish from middle circular hole, the end that top positioning sleeve stretches out is provided with baffle ring 17, in the middle of the external diameter of baffle ring is greater than, the diameter of circular hole, is radially provided with three screws on baffle ring, and the axis of three relatively top positioning sleeves of screw is symmetrical.The position that trunk portion is connected with round plate is provided with bulge loop 8, between bulge loop and the inwall of top positioning sleeve, is interference fits, the external diameter at all the other positions of trunk portion be less than bulge loop external diameter and with the inwall of top positioning sleeve be matched in clearance.The outer wall of trunk portion is withstood in the end of three screws, thereby the radial position of the screw-in depth adjustable column body by adjustment screw guarantees the axiality of center sleeve.
The centre of center sleeve is provided with through hole, through hole is arranged to cone-shaped in one end of trunk portion, top 19 are inserted in taper and fix, in through hole, be inserted with top bolt 1, one end of top bolt is double-screw bolt, double-screw bolt and top tail end are spirally connected fixing, and the other end of top bolt connects outside dish through connecing the bolt hole of dish after top and reaching after top.The centre position of the round plate of center sleeve is provided with cavity 5, the position of top bolt respective cavities is equipped with spring 20, the diameter of cavity is greater than the maximum outside diameter of spring, and the bottom of cavity is withstood in one end of spring, and the other end of spring withstands the medial surface that connects dish after top.The distance connecing after top between the medial surface of dish and the end face of the round plate of center sleeve is greater than top displacement.Top bolt reaches and on the position of center sleeve outside, is provided with two symmetrical translots.Clamp translot and can rotate top bolt, facilitate the double-screw bolt of top bolt end and top tail end to be spirally connected.
The external stability that connects dish after top has approach switch 21, the tail position of the corresponding top bolt in induction position of approach switch, the length that the tail end of top bolt and the distance between approach switch are spring-compressed, the position of approach switch fixes according to the setting of top thrust.Approach switch is connected with the displacement controller of support, and the variation of spring-compressed power is changed by the movement of support, the position of displacement controller major control support.
Adjustment screw, repair top radial position, the position of adjusting proximity switch to be to regulate top thrust, the top tail end that withstands workpiece, and support moves to workpiece direction simultaneously, spring is compressed gradually, the tail end of top bolt reaches after top and connects outside dish, and the tail end of top bolt moves closer to approach switch, and approach switch produces induction, signal is transferred to the displacement controller of support, and support stops mobile.
Above-described embodiment is a kind of preferred version of the present invention, not the present invention is done to any pro forma restriction, also has other variant and remodeling under the prerequisite that does not exceed the technical scheme that claim records.
Claims (9)
1. a molded gear grinding machine movable center mechanism, comprise support (10), on support, be provided with axial circular hole (3), axially the two ends of circular hole be respectively arranged with connect before top dish (14) and top after connect dish (2), it is characterized in that being provided with in axial circular hole reaching before top and connect the top positioning sleeve (13) outside dish, in top positioning sleeve, be inserted with center sleeve (15), one end of center sleeve is provided with top (19), the middle part of center sleeve is provided with top bolt (1), one end of top bolt and top be spirally connected fixing, the other end of top bolt reaches after top and connects outside dish, on top bolt, be equipped with spring (20), the two ends of spring respectively with the other end of center sleeve and top after connect dish inner surface contact, between top positioning sleeve and axial circular-hole internal-wall, be provided with some steel balls (12), steel ball is connected in series by steel ball retainer (11).
2. molded gear grinding machine movable center mechanism according to claim 1, is characterized in that being fixed with dense ball set (9) in axial circular hole, and steel ball is between dense ball set and top positioning sleeve; The length of steel ball retainer is less than the length of dense ball set, and length difference is at least greater than top displacement.
3. molded gear grinding machine movable center mechanism according to claim 1, it is characterized in that center sleeve comprises round plate (4) and trunk portion (18), the perpendicular formation of round plate and trunk portion T shape structure, trunk portion is inserted in top positioning sleeve, the axis place of trunk portion is provided with bellmouth, top being inserted in bellmouth; Connecting portion between trunk portion and round plate is provided with bulge loop (8), between bulge loop and top positioning sleeve, is interference fits, is matched in clearance, and is provided with radial adjustment device in the end of top positioning sleeve between all the other positions of trunk portion and top positioning sleeve.
4. molded gear grinding machine movable center mechanism according to claim 3, is characterized in that radial adjustment device is the screw (16) that is radially arranged on top positioning sleeve end, and totally three, screw, is distributed on top positioning sleeve end.
5. according to the molded gear grinding machine movable center mechanism described in claim 1 or 2 or 3 or 4, it is characterized in that the end of top positioning sleeve is provided with baffle ring (17), the external diameter of baffle ring is greater than the diameter that connects the middle circular hole of dish before top.
6. according to the molded gear grinding machine movable center mechanism described in claim 1 or 3 or 4, the axis position that it is characterized in that center sleeve is provided with through hole, top bolt penetrates in through hole, and the middle part of the other end of center sleeve is provided with cavity (5), and spring is in cavity.
7. according to the molded gear grinding machine movable center mechanism described in claim 1 or 2 or 3 or 4, it is characterized in that the outside that connects dish after top is fixed with approach switch (21), it is corresponding that the sensed position of approach switch and top bolt reach top Hou Jiepan end; Approach switch is connected with the displacement controller of support.
8. according to the molded gear grinding machine movable center mechanism described in claim 3 or 4, it is characterized in that the distance connecing between the medial surface of dish and the end face of the round plate of center sleeve after top is greater than top displacement.
9. according to the molded gear grinding machine movable center mechanism described in claim 3 or 4, it is characterized in that being provided with on support screwed hole, in screwed hole, be rotary with holding screw, be provided with axial chute on the sidewall of the round plate of center sleeve, the end of holding screw extend in chute.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210073030.6A CN102728860B (en) | 2012-03-19 | 2012-03-19 | Movable center mechanism for formed grinding machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210073030.6A CN102728860B (en) | 2012-03-19 | 2012-03-19 | Movable center mechanism for formed grinding machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102728860A CN102728860A (en) | 2012-10-17 |
| CN102728860B true CN102728860B (en) | 2014-01-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210073030.6A Expired - Fee Related CN102728860B (en) | 2012-03-19 | 2012-03-19 | Movable center mechanism for formed grinding machine |
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| CN (1) | CN102728860B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105643328A (en) * | 2016-04-13 | 2016-06-08 | 成都亨通兆业精密机械有限公司 | Fixing mechanism for machining |
| CN105773256A (en) * | 2016-04-13 | 2016-07-20 | 成都亨通兆业精密机械有限公司 | Workpiece fixing mechanism for lathe facilitating improvement of machining efficiency |
| CN106624199A (en) * | 2016-12-25 | 2017-05-10 | 重庆润跃机械有限公司 | Precise centering device of gear |
| CN107096930A (en) * | 2017-04-20 | 2017-08-29 | 大连金华德精密轴有限公司 | A kind of tip mechanism of gear rolling machine |
| CN109202107A (en) * | 2018-10-30 | 2019-01-15 | 西安法士特汽车传动有限公司 | A kind of Double Tops point positioning mechanism and its localization method with bearing |
| CN111015263B (en) * | 2019-12-27 | 2020-11-27 | 南京金城精密机械有限公司 | Lathe fixture self-centering structure |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87204785U (en) * | 1987-11-20 | 1988-10-19 | 铁道部株洲电力机车工厂 | Telescopic lubricating center |
| CN2037277U (en) * | 1988-11-05 | 1989-05-10 | 刘兴民 | Self-lubrication spring centre |
| DE3803470A1 (en) * | 1988-02-05 | 1989-08-17 | Fortuna Werke Maschf Ag | Live centre |
| CN2089853U (en) * | 1991-05-15 | 1991-12-04 | 吴忠民 | High severity and high trueness centre |
| CN2638888Y (en) * | 2003-07-02 | 2004-09-08 | 哈尔滨量具刃具厂 | Tailstock live centre device |
| CN2925702Y (en) * | 2006-05-20 | 2007-07-25 | 湖北三环离合器有限公司 | Flexible elastic tip |
| CN102039427A (en) * | 2009-10-19 | 2011-05-04 | 西安贝吉姆机床股份有限公司 | Movable centre mechanism of gear grinding machine |
-
2012
- 2012-03-19 CN CN201210073030.6A patent/CN102728860B/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87204785U (en) * | 1987-11-20 | 1988-10-19 | 铁道部株洲电力机车工厂 | Telescopic lubricating center |
| DE3803470A1 (en) * | 1988-02-05 | 1989-08-17 | Fortuna Werke Maschf Ag | Live centre |
| CN2037277U (en) * | 1988-11-05 | 1989-05-10 | 刘兴民 | Self-lubrication spring centre |
| CN2089853U (en) * | 1991-05-15 | 1991-12-04 | 吴忠民 | High severity and high trueness centre |
| CN2638888Y (en) * | 2003-07-02 | 2004-09-08 | 哈尔滨量具刃具厂 | Tailstock live centre device |
| CN2925702Y (en) * | 2006-05-20 | 2007-07-25 | 湖北三环离合器有限公司 | Flexible elastic tip |
| CN102039427A (en) * | 2009-10-19 | 2011-05-04 | 西安贝吉姆机床股份有限公司 | Movable centre mechanism of gear grinding machine |
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| CN102728860A (en) | 2012-10-17 |
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Effective date of registration: 20150928 Address after: 70 No. 311800 Zhejiang province Zhuji City Tao Street Zhancheng Avenue Patentee after: Zhejiang Kalibo transmission equipment Co. Ltd. Address before: 311800 Zhejiang city of Shaoxing province Zhuji City Tao Street Industrial Road No. 5 two Patentee before: Zhejiang Kalibo Precision Machinery Co., Ltd. |
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