CN1031037A - Four-jaw self-centering chuck - Google Patents
Four-jaw self-centering chuck Download PDFInfo
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- CN1031037A CN1031037A CN 87105378 CN87105378A CN1031037A CN 1031037 A CN1031037 A CN 1031037A CN 87105378 CN87105378 CN 87105378 CN 87105378 A CN87105378 A CN 87105378A CN 1031037 A CN1031037 A CN 1031037A
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- self
- claw
- centering
- jaw
- blank
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Abstract
Four-jaw self-centering chuck has housing (1,12), be equipped with in the housing and clamp claw (3,14), clamping claw (3,14) can move radially, can with the co-operating of self centering mechanism, self-centering unit is connected with transmission device and moves, thereby clamping claw (3,14) is moved radially.Self-centering unit has four levers (6,25), and the axle (7,24) of lever (6,25) is contained on the member of transmission device.The arm end of adjacent lever (6,25) then is contained in and clamps in the claw (3,14), thereby forms the closed-loop path (11,28) of power.
Description
The present invention relates on lathe, make the device of blank centering and clamping, specifically, relate to four-jaw self-centering chuck.
The present invention is best suited on the tubing machining tool and is felt relieved to processing pipe end.
The present invention also can be in order to feel relieved by the blank of center symmetry (as figure, ellipse, square, rectangle and hexagon uiform section) to datum level shape blank devious and cross section.
In three general common claws, four-jaw self-centering chuck, it all is equidistant clamping between claw and the chuck axis.But when pressing centrosymmetric blank with claw clamping datum level shape blank devious and cross section, the blank axis can produce deviation with respect to the chuck axis, and (" jig Design principle " Cole spreads wealthy husband BC work, nineteen eighty-three second revision added edition, machine-building publishing house (Moscow) publishes, chapter 2, the 3rd joint, the 33-35 page or leaf).
General common four-jaw self-centering chuck is provided with the clamping claw that can move radially in its housing, clamp claw and self-centering unit co-operating, self-centering unit is connected with transmission device and moves (SU, A, 234826).
Self-centering unit has two two-throw cranks of totally one rotating shaft.Each two-throw crank is used so that the same moved further of a pair of clamping claw.Transmission device is made of two in-line gears, and these two in-line gears are meshed with the 3rd gear.The axle of the 3rd gear is made " moving about " formula, and the end of each in-line gears is provided with helicla flute.
Each carries out in the following manner to the same moved further that clamps claw: when the 3rd gear rotated, two in-line gears promptly began to rotate in the opposite direction.Simultaneously, every pair clamps the helicla flute co-operating that a claw and an in-line gears end are arranged in the claw and moves in the radial slot of housing, and by two-throw crank another clamping claw is moved.
In two pairs of opposed clamping claws, there is a pair of claw when contacting, to stop with the surface that is pressed from both sides blank, and another promptly begins to make blank to move with respect to the claw of closure a claw that clamps in the claw once contacting with blank, till making blank be positioned on the axis of chuck, also promptly, up to blank with till the 4th claw contacts.Because the interaction of power is to produce by the gear with " moving about " axle between the two pairs of opposed clamping claws, increasing acts on the power that makes on the clamping claw that blank moves can make the power that acts on the closed claw also increase, and this just makes the amount of force inequality that respectively clamps when clamping blank on the claw.If the shape of rough benchmark face has deviation, for the mobile blank of centering the time, must strengthen the distance between closed a pair of clamping claw, in this case, blank will clamp claw by three and feel relieved.This be since in blank centering and the process that clamps distance that clamps between the claw tooth can not strengthen closure with the helicla flute interlock of geared end a pair of clamping claw only.The difference of two pairs of opposed clamping claws on distance is subjected to the restriction of the 3rd " moving about " gear upper groove length.
Therefore, common four-jaw self-centering chuck can not guarantee that the cross section obtains higher centering precision and clamping reliability by centrosymmetric blank.
Task of the present invention is to design a kind of four-jaw self-centering chuck, make its self-centering unit have higher blank centering precision and clamping reliability, and aspect center symmetry and datum level shape blank devious, enlarge its technological ability in the clamping cross section.
This task can solve as follows.In the housing of four-jaw self-centering chuck, be provided with the clamping claw that can move radially, clamp claw and self-centering unit co-operating, self-centering unit is connected with the transmission device that the clamping claw is moved radially and moves, self-centering unit has four levers by the present invention, the axle of lever is contained on the transmission device member, the arm end of adjacent lever then is contained in and clamps in the claw, thereby forms the closed-loop path of a power.
Along under the situation of the axis transfer function power of four-jaw self-centering chuck, the transmission device member should form a and stagnate and penalize the fen lie that stagnates to stick up the large of widely different lie spoon bangs Cuo flood dragon and tease and stagnate and spin the disconnected Chi of the smoke tree core of remonstrating with and wish in order to the axle of four levers to be installed.
In the rotation by the transmission device member under the situation of four-jaw self-centering chuck transfer function power, four slide blocks in the radial slot constitute this member in the housing by being contained in, in slide block, be provided with hole perpendicular to its direction of motion, in order to the axle of lever to be installed, simultaneously, each slide block is connected with ring in being contained in housing by intermediate member, and ring can rotate around its axis.
At four-jaw self-centering chuck is under the situation of manual transmission, each slide block can be connected with intermediate member by the between cog engagement, ring then is connected with intermediate member by saddle, and saddle is contained in the radial slot of ring, can move along groove.
The four-jaw self-centering chuck of recommending is a fexible unit, can guarantee blank, no matter its orientation in chuck how, on two mutually perpendicular directions, has the degree of precision of centering and clamping; But this chuck pair cross-section is felt relieved by the blank of center symmetry (for example circular, oval, square, rectangle and hexagon etc.) and is clamped, and need not readjust the clamping claw of chuck.
Below quote the example of the four-jaw self-centering chuck of making by the present invention, and describe by accompanying drawing.
Fig. 1 is the front view of four-jaw self-centering chuck first embodiment;
Fig. 2 is the II-II section among Fig. 1;
Fig. 3 is the III-III section among Fig. 1;
Fig. 4 is the front view of four-jaw self-centering chuck second embodiment;
Fig. 5 is the V-V section among Fig. 4.
First embodiment:
Four-jaw self-centering chuck has housing 1 (Fig. 1), is equipped with to clamp claw 3 in the radial slot 2 of housing 1, and clamping claw 3 has jaw 4 and can move in groove 2.Being equipped with in housing 1 can axially movable crosshead 5 (Fig. 1,2), and crosshead 5 is the member of a transmission device (not shown on the figure), can have and the corresponding any structure of its purposes.Crosshead 5 is by self-centering unit and 3 co-operatings of clamping claw.Self-centering unit has four levers 6, in axle 7 radial holes 8 (Fig. 2) that are contained in the crosshead 5 of lever 6.Each clamps claw 3 and is connected with slide block 9 by the wedge surface engagement.In each slide block 9, be provided with mutually perpendicular cannelure 10 (Fig. 2,3), be provided with the arm end of adjacent lever 6 in the groove.The closed-loop path 11 (Fig. 1) of four slide blocks 9 and a power of four lever 6 compositions.
Second embodiment:
Four-jaw self-centering chuck has housing 12 (Fig. 4), and the clamping claw 14 of band jaw 15 is installed in the radial slot 13 of housing 12, and clamping claw 14 can move in radial slot 13.The kinematic chain of transmission device comprises ring 16 (Fig. 5) and four wedge surface tooth bars 17.Ring 16 is housed in housing 12, and ring 16 can rotate around its axis, is provided with four radial slots 18 in ring 16.Each wedge surface tooth bar 17 is by saddle 19 and ring 16 interlocks, and saddle 19 is installed on the axle 20 of wedge surface tooth bar 17, can rotate on axle, and can move in radial slot 18.Be provided with four radial slots 21 in housing 12, in each radial slot 21 wedge surface slide block 22 be housed, wedge surface slide block 22 is the member of transmission device, and meshes with wedge surface tooth bar 17.In each wedge surface slide block 22, be provided with hole 23, in order to axle 24 to be set perpendicular to its direction of motion.Angular lever 25 is housed at each on 24.Clamp in the claw 14 at each, on perpendicular to its direction of motion, be provided with groove 26 (Fig. 4), the arm end of adjacent angular lever 25 is housed in the groove 26." screw-nut " kinematic pair 27 is a transmission device, and each wedge surface tooth bar 17 then has the effect of " nut ".Four angular levers 25 and four closed-loop paths 28 that clamp a power of claw 14 compositions.
The four-jaw self-centering chuck of making by first embodiment is in the following manner.
The lever 6 on the axle 7 moves along the chuck axis in its radial hole 8 together with being contained in to make crosshead 5 by transmission device (expressing on the figure).Lever 6 moves adjacent slide block 9 with the arm end that it is arranged in two adjacent sliders, 9 cannelures 10, between slide block 9 and corresponding clamping claw, adopt wedge surface to connect, and make that to clamp claw 3 mobile to blank surface (not shown on the figure) along the radial slot 2 of housing 1.A certain jaw 4 is protected gizzard river in Jiangsu Province which flows into the Huangpu River of Shanghai and is gathered around the firewood Meng ㄗ that raises and promptly stop with letting out ぜ rice huller prostitute Na, and crosshead 5 continues to move by means of the rotation of lever 6 on axle 7.
If opposed two jaws 4 (Fig. 1) and blank surface contact, then at the 3rd jaw 4 and blank is surperficial contact before, opposed two jaws 4 stop to move.
If a jaw 4 adjacent with a jaw 4 that contacts the blank surface also contacts with the blank surface, these two jaws promptly are connected to each other by corresponding cylinder bar 6, and before the 3rd jaw 4 and blank surface contacted, these two jaws began blank is shifted to the chuck axis simultaneously.
After three jaws 4 and blank surface contacts, these three jaws 4 are connected to each other by two adjacent levers 6, and with the 4th jaw 4 opposed jaws 4, make blank stressed and shift to the 4th jaw 4 by means of the arm end of two coupled levers 6.This active force is greater than the frictional force between blank and two other the closed jaw 4.
When the 4th jaw 4 with after blank contacts, because the effect of transmission device promptly begins with four jaws clamping blanks.
The closed-loop path 11 of the power that constitutes by slide block 9 and lever 6 (its arm end is positioned at the cannelure 10 of adjacent sliders 9) make opposed in pairs four clamp form between claws 3 and the chuck axis equidistant.
The working method that four claws of making by second embodiment are decided chuck automatically is as follows:
Rotatablely move the idol 27 (Fig. 4) screw rod, transmission in kinematic pair, play " nut " effect four wedge surface tooth bars 17 in a certain tooth bar 17.By the saddle 19 that 20 (Fig. 5) that are arranged on ring 16 radial slots 18 and the tooth bar 17 rotate and are connected, make mobile pass to of this wedge surface tooth bar 17 on tangential direction encircle 16.When the chuck axis rotates, make other three wedge surface tooth bars 17 do moving of tangential direction at ring 16.Four wedge surface tooth bars 17 make by the wedge surface engagement all that the slide blocks 22 in the radial slot 21 move on the housing 12.Slide block 22 is when moving radially, and the axle 24 by in the hole 23 on the slide block 22 moves radially angular lever 25, and hole 23 is to be perpendicular to one another with the moving direction of slide block 22.Each angular lever 25 moves radially clamping claw 14 with its arm end in the groove 26 (Fig. 4) on adjacent clamping claw 14.When the blank surface was pressed from both sides in a certain jaw 15 contacts, coupled clamping claw 14 promptly stopped, and slide block 22 continues to move in the radial slot 21 of housing 12 then by means of the rotation of angular lever 25 on axle 24.
If opposed two jaws 15 and blank surface contact, then at the 3rd jaw 15 and blank is surperficial contact before, these two jaws stop to move.
If the jaw 15 adjacent with the jaw 15 that contacts the blank surface also contacts with the blank surface, then at the 3rd jaw 15 with before blank contacts, these two jaws 15 are connected to each other by corresponding angular lever 25, make blank shift to the chuck axis.
Three jaws 15 and blank show contact after, these three jaws 15 promptly are connected to each other by two adjacent angular levers 25, and with the arm end of the 4th jaw 15 opposed jaws 15 by means of two coupled angular levers 25, make blank stressed and shift to the 4th jaw 15.This active force is greater than the frictional force between blank and two other the closed jaw 15.
After the 4th jaw 15 contact blanks, because the effect of transmission device promptly begins to clamp blank with all four jaws 15.
Make between paired opposed clamping claw 14 and the chuck axis formation equidistant by the closed-loop path 28 of the power that clamps claw 14 and angular lever 25 (its arm end in clamping claw 14, be positioned at and clamp the vertical groove 26 of the claw direction of motion) formation.
The closed-loop path of the power that is adopted in two embodiment of above-mentioned four-jaw self-centering chuck has guaranteed that blank is subjected to precision centering in two mutually perpendicular directions.The deviation of datum level shape can not influence the precision of centering, and because in the centering process, before the blank that is installed with all four jaws, closed jaw can unclamp, thereby makes blank be subjected to reliable clamping.
The embodiment of these two four-jaw self-centering chucks has strengthened between two pairs of opposed clamping claws at the difference degree that clamps on the size.
The lathe center ㄍ that the test specimen of the four-jaw self-centering chuck of making by the present invention once was contained in to process petroleum pipe fitting fly rare J structure ヂ Yan frequently nurse lift imitative wiping away and offer more that shelves stop the assorted grain rolling pipe of hammer sweat difference of instructing of to, when the positive thread of its end, owing to distributed allowance equably, further saved material.
Claims (4)
1. four-jaw self-centering chuck, at its housing (1, the clamping claw (3 that can do to move radially is housed 12), 14), clamp claw (3,14) with the self-centering unit co-operating, self-centering unit is connected with transmission device and moves, clamp claw (3 thereby make, 14) move radially, it is characterized in that: self-centering unit has four levers (6,25), lever (6,25) axle (7,24) be contained on the member of transmission device, and adjacent lever (6,25) arm end then is contained in and clamps claw (3,14) in, thereby form the closed-loop path (11 of a power, 28).
2. four-jaw self-centering chuck according to claim 1, it is characterized in that: the member of transmission device is a crosshead (5), be contained in the housing (1), can move axially, in crosshead (5), be provided with radial hole (8), in order to the axle (7) of four levers (6) to be installed.
3. four-jaw self-centering chuck according to claim 1, it is characterized in that: the member of transmission device is made up of four slide blocks (22) that are contained in the middle radial slot (21) of housing (12), in slide block (22), be provided with hole (23), in order to the axle (24) of lever (25) to be installed perpendicular to its moving direction.Simultaneously, each slide block (22) is connected by the intermediate member ring (16) interior with being contained in housing (12), and ring (16) can rotate around its axis.
4. four-jaw self-centering chuck according to claim 3, it is characterized in that: each slide block (22) adopts between cog to be connected with a joggle with intermediate member, encircle (16) and then be connected by the saddle (19) that can rotate on axle with each intermediate member, saddle (19) can move in the radial slot (18) of ring (16).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 87105378 CN1031037A (en) | 1987-08-05 | 1987-08-05 | Four-jaw self-centering chuck |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 87105378 CN1031037A (en) | 1987-08-05 | 1987-08-05 | Four-jaw self-centering chuck |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1031037A true CN1031037A (en) | 1989-02-15 |
Family
ID=4815305
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 87105378 Pending CN1031037A (en) | 1987-08-05 | 1987-08-05 | Four-jaw self-centering chuck |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1031037A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101224504B (en) * | 2008-02-20 | 2010-06-02 | 昆山华恒工程技术中心有限公司 | Self centering chuck |
| CN101694410B (en) * | 2009-10-14 | 2012-07-11 | 北京青云精益检测设备有限公司 | Element of positioning mechanism and positioning mechanism with same |
| CN103917317A (en) * | 2011-11-08 | 2014-07-09 | Sms米尔股份有限公司 | Chuck for a machine tool for machining a tubular, rotating workpiece |
| CN105522181A (en) * | 2016-02-04 | 2016-04-27 | 刘恩宏 | Centripetal and downward fully-hollow pull and compression chuck |
-
1987
- 1987-08-05 CN CN 87105378 patent/CN1031037A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101224504B (en) * | 2008-02-20 | 2010-06-02 | 昆山华恒工程技术中心有限公司 | Self centering chuck |
| CN101694410B (en) * | 2009-10-14 | 2012-07-11 | 北京青云精益检测设备有限公司 | Element of positioning mechanism and positioning mechanism with same |
| CN103917317A (en) * | 2011-11-08 | 2014-07-09 | Sms米尔股份有限公司 | Chuck for a machine tool for machining a tubular, rotating workpiece |
| CN103917317B (en) * | 2011-11-08 | 2016-11-16 | Sms米尔股份有限公司 | For processing the chuck of the lathe of the tubular workpiece of rotation |
| CN105522181A (en) * | 2016-02-04 | 2016-04-27 | 刘恩宏 | Centripetal and downward fully-hollow pull and compression chuck |
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| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |