CN202571319U - Pressing force-adjustable movable center mechanism - Google Patents
Pressing force-adjustable movable center mechanism Download PDFInfo
- Publication number
- CN202571319U CN202571319U CN 201220104116 CN201220104116U CN202571319U CN 202571319 U CN202571319 U CN 202571319U CN 201220104116 CN201220104116 CN 201220104116 CN 201220104116 U CN201220104116 U CN 201220104116U CN 202571319 U CN202571319 U CN 202571319U
- Authority
- CN
- China
- Prior art keywords
- center
- sleeve
- bolt
- dish
- positioning sleeve
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Springs (AREA)
Abstract
The utility model relates to a pressing force-adjustable movable center mechanism, and overcomes the defects that a guide sleeve in the prior art is longer, the displacement of a center is limited and a pressing force of the center is inconveniently adjusted. An axial round hole is formed in a bracket; a center locating sleeve is arranged in the axial round hole; a center sleeve is inserted into the center locating sleeve; the center is arranged at one end of the center sleeve; a center bolt is arranged in the middle of the center sleeve; one end of the center bolt is fixed with the center in a screwed way; the other end of the center bolt extends out of a rear center receiving disc; the center bolt is sleeved by a spring; and a proximity switch in a position corresponding to the tail end of the center bolt is fixed to the outer side of the rear center receiving disc and connected with a displacement controller of the bracket. The proximity switch is fixed to the outer side of the rear center receiving disc and matched with the end part of the center bolt so as to adjust the axial displacement of the center, and the spring compression length is controlled so as to change the pressing force of the center.
Description
Technical field
The utility model relates to a kind of machine tool accessories, and especially a kind of precision is higher, and can accurately adjust the adjustable rolling center of the thrust mechanism of thrust.
Background technology
Tip mechanism is a clamping part important in the machine tooling; The product that some length of machine tooling are bigger; The chuck of lathe and tip mechanism will be used, and tip mechanism can guarantee that the centre of gyration of workpiece is on the axis of rotation of extra bed chuck all the time, improve the precision of processing.At present, lathe tip mechanism commonly used is assembling one a cover radial bearing and a cover thrust bearing in top, and radial bearing is used to support top rotation, promotes the axial force that bearing is used for bearing 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 that because it is many to influence the top factors of accuracy of lathe, rigging error is big, so positioning accuracy is poor.Lathe tip mechanism commonly used in addition can not be adjusted top center after accomplish the location.
Patent Office of the People's Republic of China discloses a CN102039427A document on May 4th, 2011, name is called gear grinding machines rolling center mechanism, comprises top slide and top; Said top slide top is fixed with end cap; Top slide set inside has lead moving up and down and top, and is used to connect lead and top jackscrew cover box blind rivet, and the said lead outside is disposed with guide pin bushing and spring; The lead below is equipped with the jackscrew cover; Said jackscrew cover downside is provided with jackscrew, and jackscrew cover inner upper side is provided with blind rivet, and this blind rivet downside is equipped with top.For face contact, the mobile of jackscrew cover do not wanted higher precision between the jackscrew of this tip mechanism cover and the lining, so contacts for face and just to have 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 bigger, guarantee difficulty of higher ratio of precision; Cause processing cost higher; Lead needs guide pin bushing to lead in moving process, but the length of guide pin bushing is longer, has limited the distance that lead moves; Make the displacement that tip mechanism is top; Making whole tip mechanism can not adjust top thrust, is taper fit between the top and jackscrew cover in this tip mechanism, therefore carries out adjustment inconvenience radially to top with jackscrew.
Summary of the invention
It is longer that the utility model has solved in the prior art length of guide pin bushing; Define top displacement, be inconvenient to adjust the defective of top thrust, the adjustable rolling center of a kind of thrust mechanism is provided; Saved guide pin bushing; Make top displacement not receive the restriction of guide pin bushing length, top displacement changes and just can adjust top thrust near the position of switch limiting near switch.
The utility model has also solved in the prior art between jackscrew cover and the lining and has contacted for face; Cause difficulty of processing to strengthen, the defective that processing cost increases provides the adjustable rolling center of a kind of thrust mechanism; The appearance of top positioning sleeve is that point contacts with overcoat; Top moves to rolling friction, has reduced difficulty of processing, has also saved processing cost.
The utility model has also solved between the top and jackscrew cover of the prior art and has been cone match; Can't be to top defective of carrying out independent radiai adjustment; The adjustable rolling center of a kind of thrust mechanism is provided; Thereby regulate top radial position through regulating center sleeve, can't be thereby avoid to top problem of regulating separately.
The utility model solves the technical scheme that its technical problem adopted: a kind of thrust is adjustable rolling center mechanism, comprise support, and support is 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; Axially be provided with an end in the circular hole and reach and connect the outer center sleeve of dish before top, the end of stretching out of center sleeve is provided with toply, and the middle part of center sleeve is provided with top bolt; It is fixing that one end of top bolt and top is spirally connected; The other end of top bolt reaches and connects outside the dish after top, is equipped with spring on the top bolt, the two ends of spring respectively with the other end of center sleeve and top after connect dish inner surface contact; Connect after top the dish external stability have corresponding top bolt tail end near switch, link to each other with the displacement controller of support near switch.Top and center sleeve fixes, and top tail end and top bolt bolt are equipped with spring on the top bolt; Top moving drives top positioning sleeve and moves, the compression spring; Spring provides top thrust, and the compression stress that changes spring just can change the thrust of top generation; Top bolt reaches and connects outside the dish after top, makes can not bend in the spring compression process, keeps the axis direction of compression, center sleeve displacement simultaneously also can through top bolt with top after connect and cooperating the formation guide effect between the dish; Be used for limiting the displacement of top bolt near switch, finally limit top displacement, mainly be the reduction length that changes spring, thereby change top thrust.
As preferably, axially be fixed with dense ball set in the circular hole, the center sleeve outer cover is equipped with top positioning sleeve, is provided with some steel balls between top positioning sleeve and the dense ball set, and steel ball is connected in series by the steel ball retainer.In order to simplify the difficulty of processing of support shaft to inner hole wall, the interior fixedly dense ball set of axial bore, steel ball are in dense ball set inside and contact with the inwall of dense ball set; Center sleeve is inserted in the top positioning sleeve, and center sleeve and top positioning sleeve are into a single integrated structure, and top positioning sleeve outer setting has steel ball, makes top positioning sleeve in moving process, bear rolling friction, and frictional resistance is little, and the sensitivity of tip mechanism is higher; Steel ball makes between top positioning sleeve and the dense ball set inwall and to have reduced the difficulty of processing for some contact, also reduced production cost; Steel ball defines the distance between the steel ball by steel ball retainer serial connection, guarantees the distance between steel ball and the steel ball, and steel ball can not interfere in rolling process; The steel ball retainer can adopt various ways, and such as adopting tubular structure, tube wall is provided with cylindrical hole, perhaps adopts the crooked steel bands of many groups to be combined to form the netted steel ball retainer etc. of fixing steel ball.
As preferably, 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.Top positioning sleeve is in moving process, and the steel ball retainer also can be moved, and the steel ball retainer makes the steel ball retainer have mobile space less than the length of dense ball set, 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 the top positioning sleeve, and the axis place of trunk portion is provided with bellmouth, top being inserted in the bellmouth; Connecting portion between trunk portion and the round plate is provided with bulge loop, is interference fits between bulge loop and the top positioning sleeve, is matched in clearance between all the other positions of trunk portion and the top positioning sleeve, and is provided with the radiai adjustment device in the end of top positioning sleeve.Center sleeve round plate in moving process formation position limiting structure that can contact with the dense ball set end is a matched in clearance between trunk portion and the top positioning sleeve, and bulge loop is an interference fits, and is convenient to top interplanting radiai adjustment, thereby accomplishes top further location; The radiai adjustment device can adopt various ways, is the structure of the conical surface such as threaded inwall, perhaps adopts centrosymmetric a plurality of bolt structure.
As preferably, the radiai adjustment device is for radially being arranged on the screw of top positioning sleeve end, and totally three on screw is distributed in top positioning sleeve end.Screw adjusted is processed 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 of the middle circular hole that connects dish before top.Extend into the length in the axial circular hole when ring defines top positioning sleeve, also just define top displacement.
As preferably, the axis position of center sleeve is provided with through hole, and top bolt penetrates in the through hole, and the middle part of the other end of center sleeve is provided with cavity, and spring is in the cavity.Top bolt penetrates in the through hole, and an end reaches outside the through hole, and the position of stretching out can clamping, 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, connect distance between the end face of round plate of medial surface and center sleeve of dish after top greater than top displacement.The end face that prevents the round plate of center sleeve near switch does not also have action with top after connect dish medial surface contact, make near switch forfeiture effect.
As preferably, support is provided with screwed hole, is rotary with holding screw in the screwed hole, and the sidewall of the round plate of center sleeve is provided with axial chute, and the end of holding screw extend in the chute.Holding screw cooperates with axial chute, can organize center sleeve to rotate around axis, does not move axially but can not hinder center sleeve.
The beneficial effect of the utility model is: connects after top and coils outer being fixed with, match with the end of top bolt near switch, thereby regulate top axial displacement near switch, and the length of control spring compression, thus change top thrust; Top positioning sleeve for rolling friction, has reduced the resistance when mobile in moving process, sensitivity is higher; Steel ball is between the outer wall of top positioning sleeve, steel ball and support shaft for some contact, prevent that employing face contacts between top positioning sleeve and the axial circular hole between circular-hole internal-wall, has reduced the difficulty of processing, and has also reduced production cost.
Description of drawings
Fig. 1 is a kind of structural representation of the utility model;
Fig. 2 is the structural representation of a kind of steel ball retainer of the utility model;
Among the 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, the 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, near switch, 22, cylindrical hole.
The specific embodiment
Pass through specific embodiment below, and combine accompanying drawing, do further bright specifically the technical scheme of the utility model.
Embodiment: a kind of thrust is adjustable rolling center mechanism (referring to accompanying drawing 1); Comprise support 10; Support is arranged on the lathe of gear grinding machines, and support is provided with axial circular hole 3, axially the two ends of circular hole be fixed with respectively connect before top dish 14 with 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 be provided with the center sleeve 15 of T shape in the circular hole, 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; The outer peripheral face of round plate is provided with axial chute 7; The corresponding position of support is provided with screwed hole, is rotary with holding screw 6 in the screwed hole, and the end of holding screw extend into the interior restriction of chute center sleeve and rotates around axis.
Axially be fixed with dense ball set 9 in the circular hole, an 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 is through steel ball retainer 11 (referring to accompanying drawing 2) serial connection.The steel ball retainer is a cylinder-like structure, and barrel is provided with some cylindrical holes 22 radially, and steel ball is in the 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, and the length of steel ball retainer is three times of top displacement.The end of top positioning sleeve reaches from middle circular hole and connects outside the dish before top; The end that top positioning sleeve stretches out is provided with baffle ring 17; The external diameter of baffle ring radially is provided with three screws greater than the diameter of middle circular hole on the baffle ring, the axis symmetry of three top relatively positioning sleeves of screw.The position that trunk portion is connected with round plate is provided with bulge loop 8, is interference fits between the inwall of bulge loop and top positioning sleeve, the external diameter at all the other positions of trunk portion less than the external diameter of bulge loop 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 through 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 at an end of trunk portion; Top 19 are inserted in the taper and fixing, are inserted with top bolt 1 in the through hole, and an end of top bolt is a double-screw bolt; Double-screw bolt and top tail end are spirally connected fixing, and the other end of top bolt passes to connect the bolt hole of dish after top and reach and connects outside the dish 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 an end of spring withstands the bottom of cavity, and the other end of spring withstands the medial surface that connects dish after top.Connect distance between the end face of round plate of medial surface and center sleeve of dish after top greater than top displacement.Top bolt reaches two translots that the outside position of center sleeve is provided with symmetry.Clamp translot and can rotate top bolt, the double-screw bolt and the top tail end of convenient top bolt end are spirally connected.
The external stability that connects dish after top has near switch 21; Tail position near the corresponding top bolt in the induction position of switch; The tail end of top bolt and be the length of spring compression near the distance between the switch fixes near the setting according to top thrust of the position of switch.Be connected with the displacement controller of support near switch, the variation of spring compression stress is changed by moving of support, the position of displacement controller major control support.
Adjustment screw is repaired top radial position, regulates position near switch to regulate top thrust; The top tail end that withstands workpiece, support moves to the workpiece direction simultaneously, and spring is compressed gradually; The tail end of top bolt reaches and connects outside the dish after top, and the tail end of top bolt moves closer near switch, produces induction near switch; Signal is transferred to the displacement controller of support, and support stops to move.
Above-described embodiment is a kind of preferred version of the utility model, is not the utility model is done any pro forma restriction, under the prerequisite that does not exceed the technical scheme that claim puts down in writing, also has other variant and remodeling.
Claims (9)
1. the adjustable rolling center of a thrust mechanism comprises support (10), and support is 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 the axial circular hole end and reach and connect the outer center sleeve (15) of dish before top, the end of stretching out of center sleeve is provided with top (19), and the middle part of center sleeve is provided with top bolt (1); It is fixing that one end of top bolt and top is spirally connected; The other end of top bolt reaches and connects outside the dish after top, is equipped with spring (20) on the top bolt, the two ends of spring respectively with the other end of center sleeve and top after connect dish inner surface contact; Connect after top the dish external stability have corresponding top bolt tail end near switch (21), link to each other with the displacement controller of support near switch.
2. the adjustable rolling center of thrust according to claim 1 mechanism; It is characterized in that being fixed with in the axial circular hole dense ball set (9); The center sleeve outer cover is equipped with top positioning sleeve (13); Be provided with some steel balls (12) between top positioning sleeve and the dense ball set, steel ball is connected in series by steel ball retainer (11).
3. the adjustable rolling center of thrust according to claim 2 mechanism is characterized in that the length of the length of steel ball retainer less than dense ball set, and length difference is at least greater than top displacement.
4. the adjustable rolling center of thrust according to claim 1 mechanism; 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 the top positioning sleeve, and the axis place of trunk portion is provided with bellmouth, top being inserted in the bellmouth; Connecting portion between trunk portion and the round plate is provided with bulge loop (8), is interference fits between bulge loop and the top positioning sleeve, is matched in clearance between all the other positions of trunk portion and the top positioning sleeve, and is provided with the radiai adjustment device in the end of top positioning sleeve.
5. the adjustable rolling center of thrust according to claim 4 mechanism is characterized in that the radiai adjustment device for radially being arranged on the screw (16) of top positioning sleeve end, and totally three on screw is distributed in top positioning sleeve end.
6. according to claim 2 or the adjustable rolling center of 3 described thrusts mechanism, 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 of the middle circular hole that connects dish before top.
7. according to claim 1 or 2 or 3 or the 4 or 5 adjustable rolling center of described thrust mechanisms; The axis position that it is characterized in that center sleeve is provided with through hole; Top bolt penetrates in the through hole, and the middle part of the other end of center sleeve is provided with cavity (5), and spring is in the cavity.
8. according to claim 1 or 2 or 3 or the 4 or 5 adjustable rolling center of described thrust mechanisms, it is characterized in that connecing after top distance between the end face of round plate of medial surface and center sleeve of dish greater than top displacement.
9. according to claim 1 or 2 or 3 or the 4 or 5 adjustable rolling center of described thrust mechanisms; It is characterized in that support is provided with screwed hole; Be rotary with holding screw (6) in the screwed hole; The sidewall of the round plate of center sleeve is provided with axial chute (7), and the end of holding screw extend in the chute.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220104116 CN202571319U (en) | 2012-03-19 | 2012-03-19 | Pressing force-adjustable movable center mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220104116 CN202571319U (en) | 2012-03-19 | 2012-03-19 | Pressing force-adjustable movable center mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202571319U true CN202571319U (en) | 2012-12-05 |
Family
ID=47240771
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220104116 Expired - Fee Related CN202571319U (en) | 2012-03-19 | 2012-03-19 | Pressing force-adjustable movable center mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202571319U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103047917A (en) * | 2012-12-21 | 2013-04-17 | 浙江龙纪汽车零部件有限公司 | Simple gear shaft tooth space radial run-out detection device |
| CN103471540A (en) * | 2013-09-29 | 2013-12-25 | 哈尔滨工程大学 | Measuring device for rack position of mechanical pump of dual-fuel engine |
| CN104019719A (en) * | 2014-05-30 | 2014-09-03 | 辽宁新风企业集团有限公司 | Lift range measuring device |
-
2012
- 2012-03-19 CN CN 201220104116 patent/CN202571319U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103047917A (en) * | 2012-12-21 | 2013-04-17 | 浙江龙纪汽车零部件有限公司 | Simple gear shaft tooth space radial run-out detection device |
| CN103471540A (en) * | 2013-09-29 | 2013-12-25 | 哈尔滨工程大学 | Measuring device for rack position of mechanical pump of dual-fuel engine |
| CN103471540B (en) * | 2013-09-29 | 2015-12-02 | 哈尔滨工程大学 | A kind of rack position of mechanical pump of dual-fuel engine measurement mechanism |
| CN104019719A (en) * | 2014-05-30 | 2014-09-03 | 辽宁新风企业集团有限公司 | Lift range measuring device |
| CN104019719B (en) * | 2014-05-30 | 2019-01-11 | 辽阳钜锋汽车零部件有限公司 | Lift range measuring apparatus |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102728860B (en) | Movable center mechanism for formed grinding machine | |
| CN103495755B (en) | Machining clamp for outer wall of blind-hole thin-wall sleeve part and using method thereof | |
| CN107336040B (en) | Composite clamp for machining inner ring of synchronizer gear ring | |
| CN201095040Y (en) | Ferrule type center frame | |
| CN202571319U (en) | Pressing force-adjustable movable center mechanism | |
| CN203778799U (en) | Manual self-centering clamp for thin-walled sleeve | |
| CN101733669A (en) | Precise positioning and clamping device for stepped thin-wall barrel | |
| CN104858694A (en) | Self-centering clamp for thin-walled part | |
| CN101664882A (en) | Center frame for CNC lathe additional support | |
| CN206185202U (en) | Supporting sleeve part drill jig | |
| CN202741777U (en) | Double-headed core expansion type spindle clamp | |
| CN202877950U (en) | Tubular workpiece self-centering holding device | |
| CN201776470U (en) | Positioning and clamping device of thin-wall cylinder | |
| CN204639184U (en) | Cylinder block turning centering is risen fixture | |
| CN206550399U (en) | A kind of fixture for being adapted to small thin walled cylinder body drilling | |
| CN2843678Y (en) | Bearings-ring style centering holder | |
| CN102922450B (en) | Clamping device for cylindrical surface test piece | |
| CN205703365U (en) | Hub of motorcycle spoke hole processing tool | |
| CN205437380U (en) | Helical disk gear mills with clamping apparatus | |
| CN204449988U (en) | Thin wall cylinder cover bore hole air clamper | |
| CN207642483U (en) | A kind of wire-drawing die rotation self-centering fixture | |
| CN206253659U (en) | A kind of tailstock center device of adjustable machining accuracy | |
| CN202804669U (en) | Lathe central frame used for processing shaft type workpiece | |
| CN2843737Y (en) | Special chuck of centering drill | |
| CN204248132U (en) | A kind of synchronized gear shaping clamping tool |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121205 Termination date: 20150319 |
|
| EXPY | Termination of patent right or utility model |