CN101468439A - Improved structure of main spindle broaching tool - Google Patents
Improved structure of main spindle broaching tool Download PDFInfo
- Publication number
- CN101468439A CN101468439A CNA2007103056973A CN200710305697A CN101468439A CN 101468439 A CN101468439 A CN 101468439A CN A2007103056973 A CNA2007103056973 A CN A2007103056973A CN 200710305697 A CN200710305697 A CN 200710305697A CN 101468439 A CN101468439 A CN 101468439A
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- Prior art keywords
- broach
- steel ball
- push rod
- shaft
- main shaft
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Abstract
The invention relates to an improved structure of a main shaft broach. A detent component of the invention consists of an inner bushing, a plurality of steel balls and an outer bushing, wherein the inner bushing is annularly provided with a plurality of ball holes for accommodating the steel balls; moreover, one end of each steel ball is exposed out of each ball hole to abut and contact an oblique conical surface. One end of the outer bushing is sheathed on the outer margin of the bottom end of the inner bushing, and the other end of the outer bushing is abutted to a disk spring. A space between the outer margin of the top end of the inner bushing and a push rod is smaller than a space between the end surface of a broach grabbing shaft and the push rod. When a main shaft changes the broach, the push rod is to firstly push the detent component to relieve the elastic force of the disk spring for holding the broach grabbing shaft. Afterwards, the push rod simultaneously pushes the broach grabbing shaft and the detent component to carry out broach loosening actions of a broach claw, so that the efficiency of broach changing actions is improved and the stability of the broach changing actions is ensured at the same time.
Description
Technical field
The present invention relates to a kind of main shaft tool-changing mechanism, particularly is that it grasps the structural improvement of hilt at the cutting spindle of numerical control machining.
Background technology
Numerical control machining is the important industry instrument of present precision optical machinery processing, and high speed and stable cutting speed are one of its important characteristic.And when the continuous high speed of the processing machine speed of mainshaft, be used for the hilt of clamping cutter whether to be stabilized in really on the main shaft, this point more seems important, and this key technology just is present in the tool-broaching mechanism in the main shaft.
As No. 269221 main spindle broach force amplificatory structure patent of TaiWan, China bulletin patent case (hereinafter to be referred as existing), described existing one is that back end of tie rod in described main spindle broach mechanism installs several circular holes, accommodate steel ball in the hole, described steel ball is pushed by a slide block in the pull bar or loose cutter power acts on, steel ball is pushed and protruded at described back end of tie rod, thereby make tensile machine unlikely pine, and make pull bar have broach force, when described steel ball loosens, just can make described tool-broaching mechanism pine cutter, and then work as its loose cutter power under situation less than broach force, hilt is got loose reach the tool changing purpose.
As described in Figure 1, the broaching tool structure that above-mentioned existing case disclosed, the amplification of its pulling force mainly is the pulling force that stems from pull bar 8 acts on described slide block 82 greater than spring 81 a power, make oblique cone 83 that steel ball 84 is pushed out pull bar 8 rear end outer rims, make that tensile machine is unlikely to be loosened.But, its because of slide block 82 and pull bar 8 as member independently separately, therefore needing to offer on described pull bar 8 conduit is provided with for slide block 82, not only tool changing efficient and stability are not good, and more increase on the structure complicated, fluid circuit is difficult to pass through from described slide block 82 and pull bar 8 middle installings simultaneously, and more increases the bad disappearance of its structural design.Therefore just there is the existing creation of another improvement to produce.
Please consult Fig. 2, shown in Figure 3 again, it is No. 336523 main spindle broach holding device patent of TaiWan, China patent gazette (hereinafter to be referred as existing two).Described existing two formation comprises: pull bar is to be positioned at the main shaft axle, and the rear end is provided with an annular groove 91 and held by steel ball 92 going into to form locking, and also can supply elements such as steel ball 92, flexible member 93, end plates 94 and locking board 90 to locate fast when assembling.Flexible member 93 is to be set in pull bar flange rear end, after connect locking board 90.Locking board 90 is positioned at the pull bar end, in a recessed annular groove 901 is set, what be subjected to that flexible member 93 makes progress pushes, and steel ball 92 can be pushed the pull bar annular groove, formation is locked.End plates 94 are to utilize setting element 95 to be combined in the axle end.Steel ball 92 is provided in a side of in the circular hole of end plates 94, can radially move in pull bar annular groove or the recessed annular groove of locking board, to reach the effect of locking or separating door bolt by the promotion on locking board 90 recessed annular grooves or pull bar annular groove inclined-plane.
Above-mentioned existing two start, it is the carriage release lever pushing tow that described locking board can suffer the oil pressure actuated system, end plates are fixed on mandrels backend, several circular holes are set on the panel can be held steel ball and move within it, in steel ball moves into the annular groove of pull bar and locking board when radially withstanding steel ball, be to form to lock, pull bar is not removable.And when locking board suffered pushing tow, steel ball can enter the interior concave ring groove of locking board, formed and separated door bolt, and pull bar is removable, and hilt can be replaced.On this structural design, axle must be by the start by described axle contact disc spring 96 again of described end plates pushing tow, but described disc spring, axle, flexible member and end plates are members of four separation, thereby cause the numerous and diverse of member assembling, easier error and the unsettled situation that cooperates when causing relative start between member and member.Especially described end plates must be done the elasticity activity by described flexible member, not only increase assembling, manufacturing cost, its elasticity start simultaneously also is easy to generate labile state, and this kind situation is more obvious under long-time and effect that number of times is frequent, and the necessity that is improved is arranged in fact.
In view of this, the inventor deeply inquires at aforementioned prior art problems, and by means of research and development and the manufacturing experience of being engaged in related industry for many years, actively seek the road that solves, research and development through long-term endeavour, finally Cheng Gong the improvement structure of developing main spindle broach of the present invention is to improve the problem of existing structure.
Summary of the invention
Main purpose of the present invention provides a kind of improvement structure of main spindle broach, and it is the tool-broaching mechanism that makes main shaft in control hilt clamping or the start that gets loose, can be more smooth and easy, stable, and to promote working (machining) efficiency and quality.
For achieving the above object, the technical solution used in the present invention is:
A kind of improvement structure of main spindle broach, comprise a main shaft, described main shaft inner edge is provided with a grasping knife shaft that wears disc spring, and make described grasping knife shaft one end combine as interlock with the cutter pawl that is used for grasping hilt, its other end then be used for the described grasping knife shaft of ejection and make the push rod of a predetermined stroke displacement every the Kongxiang neighbour, and described end outer peripheral face is formed with a scalene cone, and cover is organized a stopper assembly outside described scalene cone, being used for the elastic force pushing tow of vicarious described disc spring locatees described grasping knife shaft, it is characterized in that:
Described stopper assembly is by a neck bush, some steel balls, and one external bushing form, wherein said neck bush is equipped with some hole of beads, be used for being installed with for described steel ball, and each described steel ball one end is to expose each described hole of bead to contact with described scalene cone contact, and described external bushing one end be the cover group in described neck bush bottom outer rim, the other end then with described disc spring butt.
Compared with prior art, the beneficial effect that the present invention has is: when the main shaft tool changing, described push rod is understood the described stopper assembly of first pushing tow and is removed the elastic force that described disc spring is held described grasping knife shaft surely, then described push rod is passed the loose cutter action that described grasping knife shaft and stopper assembly are made the cutter pawl more simultaneously, make the tool changing start have more efficient, and guarantee its stability.
Description of drawings
Fig. 1 is the combination dissected figure of first kind of existing structure;
Fig. 2 is the combination dissected figure of second kind of existing structure;
Fig. 3 is another combination dissected figure of second kind of existing structure;
Fig. 4 is the perspective exploded view of stopper group work of the present invention and main shaft;
Fig. 5 is a combination generalized section of the present invention;
Fig. 6 is the enlarged diagram of push rod stroke of the present invention feeding;
Fig. 7 is the enlarged diagram of another stroke feeding of push rod of the present invention;
Fig. 8 is the loose cutter start generalized section of tool-broaching mechanism of the present invention;
Fig. 9 is the schematic diagram that hilt takes off behind the present invention pine cutter;
Figure 10 is the explanation schematic diagram of grasping knife shaft lock cutter of the present invention.
Description of reference numerals: 10-main shaft; The 20-push rod; 21-first pushes away face; 22-second pushes away face; The 30-tool-broaching mechanism; The 31-grasping knife shaft; 311-colludes groove; The 312-scalene cone; The 32-disc spring; 33-cutter pawl; 34-stopper assembly; The 35-neck bush; The 351-hole of bead; The some steel balls of 36-; The 37-external bushing; The 371-baffle plate; The 372-profile groove; The 38-sheath; The 41-hilt; The 42-pad.
The specific embodiment
See also Fig. 4～shown in Figure 9, the improvement structure of main spindle broach of the present invention comprises one and has the push rod 20 that main shaft 10, that high-speed cutting rotates can produce pushing tow power, and group is located at described main shaft 10 inner edges, is used for the tool-broaching mechanism 30 of clamping hilt 41.The present invention is improved at described tool-broaching mechanism 30, it mainly is made up of members such as a grasping knife shaft 31, disc spring 32, cutter pawl 33 and stopper assemblies 34, the formation of described stopper assembly 34 then comprises a neck bush 35, some steel balls 36, and a spare part such as external bushing 37, wherein:
Described grasping knife shaft 31 is to wear described disc spring 32, and the suitable place of its lower end outer rim is formed with colludes groove 311, combines as interlock with the cutter pawl 33 that is used for grasping hilt 41.The a bit of then cover in upper end is held in the relative hollow inner edge of described push rod 20, and its to be subjected to the end face of ejection be that to push away face 21 right every the Kongxiang with first of described push rod 20.Also the suitable place of described end outer peripheral face is formed with a scalene cone 312 simultaneously, is used for for 34 groups of covers of described stopper assembly.
When 34 groups of described stopper assemblies are located on the described grasping knife shaft 31, its top is to push away face 22 spacing of being separated by with second of described push rod 20, and the stage casing is to contact with described scalene cone 312, the bottom surface then with described disc spring 32 butts, being used for the elastic force of vicarious described disc spring 32 stablizes pushing tow, holds described grasping knife shaft 31 surely, makes grasping knife shaft 31 be maintained fixed the position.And its detailed structure mainly is to be equipped with some hole of beads 351 at described neck bush 35 appropriate locations, be used for being installed with for described steel ball 36, and each described steel ball 36 1 end is to expose each described hole of bead 351 to contact with described scalene cone 312 contacts.And described external bushing 37 generally is convex, the lower end forms a baffle plate 371 than the great circle footpath, the upper end is then cutd open along its periphery isogonism and is provided with some profile grooves 372, each described profile groove 372 is with to be installed with the described steel ball of in described neck bush 35 its hole of beads 351 each 36 corresponding, as the usefulness of assist location steel ball 36.Described external bushing 37 upper ends are that the cover group is in described neck bush 35 bottom outer rims during assembling, 371 on the baffle plate of the other end relies on a pad 42 and described disc spring 32 butts, and it is right every the Kongxiang further to make second of the top outer rim of described neck bush 35 and described push rod 20 push away face 22.And make described neck bush 35 end faces and described second push away the spacing of face 22, perseverance pushes away the spacing that face 21 is separated by less than described grasping knife shaft 31 end faces and described first.
In view of the above, rely on above-mentioned member to be formed, when described main shaft 10 is desired tool changing, second of described push rod 20 pushes away the described neck bush 35 of the face 22 first pushing tows of meeting, make described steel ball 36 break away from the position that contacts with described scalene cone 312, and then guarantee to remove earlier elastic force that described disc spring 32 holds described grasping knife shaft surely as shown in Figure 3.Then described push rod 20 is the forward impelling one stroke again, makes it first push away face 21 and contact described grasping knife shaft 31, contacts as shown in Figure 4 with described grasping knife shaft 31 and neck bush 35 end face ejections simultaneously and make described first, second push away face 21,22.At last, when described push rod 20 feed distances more forward the time, just can pass described grasping knife shaft 31 and do the loose cutter action of cutter pawl 33, reach tool changing purpose such as Fig. 6, shown in Figure 7, not only make the more smooth and easy tool efficiency of process of tool-broaching mechanism 30 its control tool changing starts, more can guarantee the stability and the security of the action of its folder cutter or loose cutter simultaneously.
In addition, please consult shown in Figure 10 again, what need further specify is, for guaranteeing the stable of grasping knife shaft 31 loose cuttves, suitable place, 34 groups of upper ends of establishing of the described relatively stopper assembly of described main shaft 10, locking has a sheath 38 in addition, and makes described sheath 38 be set in described external bushing 37 outer rims, avoids dish-type spring 32 to be held in the elastic force of grasping knife shaft 31 surely by the not improper releasing according to set step.
Hold above-mentioned, its detailed description is: when main shaft 10 is equipped with hilt 41, and when described hilt 41 is drawn by a downward strength F1, this downward strength F1 will be passed to grasping knife shaft 31 via cutter pawl 33, the described push rods 20 that coexist such as this external force press down strength F2, only when only having grasping knife shaft 31 to be subjected to down strength, steel ball 36 can be because of 312 ejections of the scalene cone on the grasping knife shaft 31, and down with toward side move.Its strength down can be supported through pad 42 and baffle plate 371 retainings by dish-type spring 32, but side force then is communicated to sheath 38 via steel ball 36 through external bushing 37.And formerly be present in crack between 38 of described neck bush 35, external bushing 37 and the sheaths, because eliminate through dish-type spring 32 elastic force earlier, expression steel ball 36 has not had the possibility of being displaced sideways, and then can't move down with grasping knife shaft 31 yet again, reaches the order ground of lock cutter.Moreover, if no any hilt on the main shaft, and do not have sheath 38 and block, then described dish-type spring 32) understand because of unobstructed go out main shaft outside.In addition, described sheath 38 is also as the buffering part of 37 of main shaft 10 and external bushings, at each cutter, Song Daoshi of grabbing, steel ball is all being bestowed great stress to external bushing 37, and this stress and frictional force can reduce the direct injury to main shaft 10 via the setting of sheath 38.And get final product if there are any abrasion also can directly change sheath 38.
More than explanation is just illustrative for the purpose of the present invention; and nonrestrictive, those of ordinary skills understand, under the situation of the spirit and scope that do not break away from claim and limited; can make many modifications, variation or equivalence, but all will fall within protection scope of the present invention.
Claims (3)
1. the improvement structure of a main spindle broach, comprise a main shaft, described main shaft inner edge is provided with a grasping knife shaft that wears disc spring, and make described grasping knife shaft one end combine as interlock with the cutter pawl that is used for grasping hilt, its other end then be used for the described grasping knife shaft of ejection and make the push rod of a predetermined stroke displacement every the Kongxiang neighbour, and described end outer peripheral face is formed with a scalene cone, and cover is organized a stopper assembly outside described scalene cone, being used for the elastic force pushing tow of vicarious described disc spring locatees described grasping knife shaft, it is characterized in that:
Described stopper assembly is by a neck bush, some steel balls, and one external bushing form, wherein said neck bush is equipped with some hole of beads, be used for being installed with for described steel ball, and each described steel ball one end is to expose each described hole of bead to contact with described scalene cone contact, and described external bushing one end be the cover group in described neck bush bottom outer rim, the other end then with described disc spring butt.
2. the improvement structure of main spindle broach according to claim 1, it is characterized in that: described external bushing is convex, the lower end forms a baffle plate than the great circle footpath, be used for directly against described disc spring, the upper end is then cutd open along its periphery isogonism and is provided with some profile grooves, each described profile groove is corresponding with each the described steel ball that is installed with in its hole of bead of described neck bush, with the assist location steel ball.
3. the improvement structure of main spindle broach according to claim 1 is characterized in that: the upper end that the described relatively stopper assembly of described main shaft group is established locking in addition has a sheath, described sheath to be set in described external bushing outer rim.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007103056973A CN101468439A (en) | 2007-12-28 | 2007-12-28 | Improved structure of main spindle broaching tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007103056973A CN101468439A (en) | 2007-12-28 | 2007-12-28 | Improved structure of main spindle broaching tool |
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| Publication Number | Publication Date |
|---|---|
| CN101468439A true CN101468439A (en) | 2009-07-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007103056973A Pending CN101468439A (en) | 2007-12-28 | 2007-12-28 | Improved structure of main spindle broaching tool |
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| Country | Link |
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| CN (1) | CN101468439A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102001009A (en) * | 2010-10-22 | 2011-04-06 | 大连华根机械有限公司 | Automatic knife-forging unloading device for processing central main spindle |
| CN103465047A (en) * | 2013-08-15 | 2013-12-25 | 烟台海德汽车零部件有限责任公司 | Spring assembly for broaching during machining of central main shaft |
| CN105728754A (en) * | 2014-12-08 | 2016-07-06 | 余敏守 | Main shaft broach structure of drilling machine |
| CN117226160A (en) * | 2023-11-10 | 2023-12-15 | 泰州市建奇数控设备有限公司 | Automatic conversion mechanism for main shaft head of gantry machining center |
-
2007
- 2007-12-28 CN CNA2007103056973A patent/CN101468439A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102001009A (en) * | 2010-10-22 | 2011-04-06 | 大连华根机械有限公司 | Automatic knife-forging unloading device for processing central main spindle |
| CN103465047A (en) * | 2013-08-15 | 2013-12-25 | 烟台海德汽车零部件有限责任公司 | Spring assembly for broaching during machining of central main shaft |
| CN105728754A (en) * | 2014-12-08 | 2016-07-06 | 余敏守 | Main shaft broach structure of drilling machine |
| CN105728754B (en) * | 2014-12-08 | 2017-12-12 | 余敏守 | Drilling machine main shaft broaching tool structure |
| CN117226160A (en) * | 2023-11-10 | 2023-12-15 | 泰州市建奇数控设备有限公司 | Automatic conversion mechanism for main shaft head of gantry machining center |
| CN117226160B (en) * | 2023-11-10 | 2024-03-26 | 泰州市建奇数控设备有限公司 | Automatic conversion mechanism for main shaft head of gantry machining center |
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Open date: 20090701 |