CN100433510C - Precise linear displacement apparatus - Google Patents
Precise linear displacement apparatus Download PDFInfo
- Publication number
- CN100433510C CN100433510C CNB2007100026020A CN200710002602A CN100433510C CN 100433510 C CN100433510 C CN 100433510C CN B2007100026020 A CNB2007100026020 A CN B2007100026020A CN 200710002602 A CN200710002602 A CN 200710002602A CN 100433510 C CN100433510 C CN 100433510C
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- China
- Prior art keywords
- ring
- seat
- leaf spring
- motion
- linear displacement
- 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.)
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- 229910052802 copper Inorganic materials 0.000 description 1
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- 230000035939 shock Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000010105 thermoset forming Methods 0.000 description 1
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Abstract
The invention relates to one fine displacement device, which comprises shell, move load socket, electrical magnetic drive unit, permanent unit and spring socket, wherein, the permanent magnetic unit is set inside shell; the move load socket is fixed inside shell through spring supportive socket; electrical magnetic drive unit is fixed on move socket; when electrifying the drive unit, permanent unit exerts the reverse force on the socket to drive the said move socket.
Description
Technical field
The present invention relates to a kind of precise linear displacement apparatus, relate in particular to accurate short distance linear displacement application categories such as being used for miniature magnetic head read-write system, medical treatment detection imaging system, image regulating system, microrobot driving, microswitch and minisize fluid pump.
Background technology
For now, common linear displacement apparatus imports mechanical connecting gear by magneto or stepping motor usually and the output load carrier combines, and Figure 10 is the structural representation of traditional typical linear gearshift.Please referring to shown in Figure 10, current techniques linear displacement apparatus CTZZ comprises: input motor (permanent magnetism or stepping) CT01, and feed screw (worm screw) CT03, the nut CT04 of feed screw coupling, linear displacement load bearing seat CT05 just is fixed on this nut.Be inserted in the gears engaged of gear C T02 heel feed screw (worm screw) CT03 end when the rotary shaft end of input motor CT01, the circumference that is about to import motor CT01 rotating shaft rotatablely moves, and changes the rectilinear motion of nut CT04 into.Because linear displacement load bearing seat CT05 is fixed together with nut CT04, so the anglec of rotation of input motor CT01 just can determine the linear displacement amount of load bearing seat CT05.
Be not difficult to find out by above prior art,, have a lot of inborn defectives though traditional mechanism can provide linear displacement.As input, can provide long-range displacement output, but location positioning is accurate inadequately with magneto, can not be applied in some precise linear displacements and uses; As input, can provide the more accurate displacement of short distance with stepping motor, but on the whole, parts are many and mechanism's complexity, bulky makes load bearing seat error can occur in moving process, the state that causes precision not measure.In addition, loss, the anti-poor impact resistance of jolting that the noise that radially wobbling in the motion is big, reaction speed is slow, machine driving produces, parts friction produce all are the critical defects of traditional structure, have largely limited to its application in the precise linear displacement field.
Summary of the invention
At the problem of above-mentioned existence, the object of the present invention is to provide that a kind of reaction speed is fast, the axial displacement precision high and the low precise linear displacement apparatus of degree of rolling radially.
For achieving the above object, a kind of precise linear displacement apparatus of the present invention comprises: seat, electromagnetic drive unit, permanent magnet unit and elastic supporting seat are carried in housing, motion, permanent magnet unit is arranged in the housing, motion is carried seat and is installed in the described housing by elastic supporting seat, electromagnetic drive unit is fixed on motion and carries on the seat, when when electromagnetic drive unit is switched on, permanent magnet unit applies with described elastic supporting seat to described electromagnetic drive unit and carries seat opposite effect power to motion, and described electromagnetic drive unit drives described motion and carries seat and move under the effect of permanent magnet unit.
Further, described electromagnetic drive unit is a ring-form turn, and it is the cylinder that a side has flange that seat is carried in described motion, and the ring-form turn coaxial package and fixes with described flange on cylinder, has appropriate gap between described ring-form turn and the described cylinder.
Further, described flange and the contacted face of described ring-form turn are provided with groove, and the width of this groove is fixed on the flange ring-form turn less than the wall thickness of described ring-form turn by reach the groove internal sizing on the contact-making surface of described ring-form turn and flange
Further, described permanent magnet unit comprises the ring groove shape shell that magnetic shoe and ferrimagnet are made, the ring groove shape shell comprises outer shroud and interior ring, the radius of the outer circumference surface of magnetic shoe is identical with the inner surface radius of outer shroud, and circumferentially be arranged on the outer ring inner surface, the magnetic line of force direction of described magnetic shoe is for radially, and described ring-form turn is sleeved between magnetic shoe and the interior ring, described in the gap of ring between described ring-form turn and described cylinder.
Further, described elastic supporting seat comprises forward and backward leaf spring, described leaf spring comprises interior ring edge and the outer ring edge with concentric structure, link to each other by the spring silk between interior ring edge and the outer ring edge, the interior ring edge of described back leaf spring fixes by concavo-convex screens and described flange, and the interior ring edge of described preceding leaf spring also fixes with the other end relative with flange of described cylinder by concavo-convex screens.
Further, also offer louvre on the interior ring edge of described preceding leaf spring.
Further, described housing comprises front shroud and back shroud, is fixed togather by the back-off self-locking device between front shroud and the back shroud.
Further, also comprise a ring-type spacer, this spacer is pressed against between the outer shroud of the outer ring edge of described back leaf spring and ring groove shape shell.
Further, also comprise an insulating trip, this insulating trip is arranged between the outer ring edge and housing of described preceding leaf spring.
The present invention is after the electromagnetic drive unit energising, make motion carry power variation corresponding move forward and backward of seat with electric current, make a year seat move to the desired position by mechanical return force by the action of a magnetic field power and leaf spring, therefore not only reaction speed fast, move axially the precision height, and avoided motion to carry radially wobbling of seat.
Description of drawings
Fig. 1 is a structural representation of the present invention;
Fig. 2 is a STRUCTURE DECOMPOSITION schematic diagram of the present invention;
Fig. 3 is the mounting structure schematic diagram that seat and ring-form turn are carried in motion;
Fig. 4 is the magnetic field units structural representation;
Fig. 5 is the structural representation of motion load bearing seat and wire turn, preceding plate spring sheet, back plate spring sheet;
Fig. 6 is forward and backward cover plate, and the understructure scheme of installation;
Fig. 7 is a prior art linear displacement apparatus structural representation.
Embodiment
As shown in Figure 1, the present invention includes: seat 5, electromagnetic drive unit 6, permanent magnet unit 7 and elastic supporting seat 3 are carried in housing 2, motion, permanent magnet unit 7 is arranged in the housing 2, motion is carried seat 5 and is installed in the housing 2 by elastic supporting seat 3, electromagnetic drive unit 6 is fixed on motion and carries on the seat 5, when to electromagnetic drive unit 6 energisings, permanent magnet unit 7 applies with elastic supporting seat 3 to electromagnetic drive unit 6 and carries seat 5 opposite effect power to moving, and electromagnetic drive unit 6 drive motion year seats 5 move under the effect of permanent magnet unit 7.
Below by accompanying drawing the specific embodiment of the present invention is described, similar or identical parts all adopt identical label to represent in the accompanying drawing.
As shown in Figure 1, 2, electromagnetic drive unit 6 is a ring-form turn 61, and it is the cylinder 52 that a side has flange 51 that seat 5 is carried in motion, and ring-form turn 61 coaxial packages and fix with flange 51 on cylinder 52, have appropriate gap between ring-form turn 61 and the cylinder 52.As shown in Figure 3, flange 51 is provided with groove 53 with ring-form turn 61 contacted faces, the width of this groove 53 is fixed on the flange 51 ring-form turn 61 less than the wall thickness of ring-form turn 61 by reach groove 53 internal sizings on the contact-making surface of ring-form turn 61 and flange 51.Shown in Fig. 1,4, permanent magnet unit 7 comprises the ring groove shape shell 72 that magnetic shoe 71 and ferrimagnet are made, ring groove shape shell 72 comprises outer shroud 73 and interior ring 74, the radius of the outer circumference surface of magnetic shoe 71 is identical with the inner surface radius of outer shroud 73, and circumferentially be arranged on outer shroud 73 inner surfaces, the magnetic line of force direction of magnetic shoe 71 is for radially, and ring-form turn 61 is sleeved between magnetic shoe 71 and the interior ring 74, in the gap of interior ring 74 between ring-form turn 61 and cylinder 52.As shown in Figure 5,3 of resiliency supported comprise forward and backward leaf spring 32,31, forward and backward leaf spring 32,31 comprises interior ring edge 36,34 and the outer ring edge 35,33 with concentric structure respectively, link to each other by spring silk 38,37 respectively between interior ring edge 36 and the outer ring edge 35 and between interior ring edge 34 and the outer ring edge 33, the interior ring edge 34 of back leaf spring 31 fixes by concavo-convex screens and flange 51, and the interior ring edge 36 of preceding leaf spring 32 is fixing with flange 51 relative other ends by concavo-convex screens and cylinder 52 also.Also offer louvre 39 on the interior ring edge 36 of preceding leaf spring 32.As shown in Figure 6, housing 2 comprises front shroud 22 and back shroud 21, is fixed togather by back-off self-locking device 23 between front shroud 22 and the back shroud 21.Shown in Fig. 1,2,5, also comprise a ring-type spacer 4 and an insulating trip 8, between the outer shroud 73 of the outer ring edge 37 of leaf spring 21 and ring groove shape shell 72, insulating trip 8 was arranged between the outer ring edge 35 and front shroud 22 of preceding leaf spring 22 after this spacer 4 was pressed against.Shown in Fig. 1,2,6, the present invention can be installed on the operative installations by a base 1.
Forward and backward cover plate 22,21 is made by insulating material (for example synthetic resin etc.), particularly point out and the invention provides back-off self-locking device 23, be distributed in junction, four angles respectively, as shown in Figure 6, can hold aforementioned movement and carry seat 5, shell 72, magnetic shoe 71, forward and backward leaf spring 32,31, insulating trip 8 and spacer 4, and they closely are fastened togather.Promptly made things convenient for produce in batches fast to bit manipulation, also make the structure of whole device tightr, more firm.
The metal shell 72 of ring groove shape adopts ferrimagnet to make.And magnetic shoe 71 is made by rare earth epistasis permanent magnetic material, and this device adopts four magnetic shoes 71 radially to be adsorbed in the annular groove of shell 72, as shown in Figure 4, can utilize magnetic shoe 71 radial thicknesss to greatest extent, thereby increases the magnetic flux density of the outside and inboard clearance portion greatly.Provide possibility at utmost reducing this device radial dimension.
Motion is carried seat 5 and is made by insulating material (for example synthetic resin etc.); Has cylindrical shape, motion is carried seat 5 front and back ends and is docked with interior ring edge 36,34 concentrics of ring-form turn 61, forward and backward leaf spring 32,31 by concavo-convex screens realization, as shown in Figure 5, the radially carrying simultaneously of seat 5 front and back ends is carried in motion, can guarantee device radially anti-ly jolt, resistance to impact.Motion is carried seat 5 and is had interior or external thread structure, can satisfy different output counterpart requirements.
Ring-form turn 61 can be by the coiling of thermoset forming high temperature self-adhesion copper conductor, and suit is fixed on motion and carries on the seat 5, shown in Fig. 1,3.Its mechanical location is positioned at the outer side clearance that is made of magnetic shoe 71 and shell 72 outer walls.So just formed from magnetic shoe 71, through shell 72 outer walls, diapire, inwall, passed ring-form turn 61, returned a closed magnetic circuit of magnetic shoe 71 at last, this also is effective magnetic circuit that the present invention needs.
Forward and backward leaf spring 32,31 is all made by Cu alloy material; On the one hand have the leaf spring function, have the interior ring edge 36,34 and the outer ring edge 35,33 of concentric structure, the ring edge carries seat 5 by concavo-convex screens and motion realizes radial locations, the pressing realization axial location of forward, back shroud 32,31 and spacer 4; Connect by superfine spring silk 38,39 respectively between the inner and outer ring edge of forward and backward leaf spring 32,31, form string bag shape elastic device, realize axial concentric elastic force, after device arrives the displacement limits position, to move with joint efforts by the answer of forward and backward leaf spring 32,31 and to carry seat 5 and retract the preliminary examination position, therefore possess good axial resistance to impact; Can also provide the conduction approach to ring-form turn 61 on the other hand, play electric action, can reduce the device parts, simplify the internal structure of an organization, provide possibility for reducing the device axial dimension as far as possible.
Below by Fig. 1 operation principle of the present invention and effect thereof are described:
Fig. 1 is the structure chart of this device under inoperative (static naturally) state.Seat 5 transfixions are carried in motion.When passing to electric current in the ring-form turn 61, magnetic shoe 71 will produce electromagnetic force to ring-form turn 61, therefore drives motion year seat 5 (comprising the displacement output of its connection) and moves forward.Conversely, because the forward and backward leaf spring 32,31 that is connected between motion year seat 5 and the forward and backward cover plate 22,21 is in passive extended state, so can produce corresponding opposite elastic force, this elastic force is directly proportional with the displacement that seat 5 relative forward and backward leaf springs 32,31 equilbrium positions are carried in motion.Motion is carried when seat 5 moves forward to a certain position and can be stopped automatically, and this position elastic force equates with electromagnetic force and at equilibrium.This shows,, can make motion carry seat 5 and move to the desired position by the electric current of applying suitable size for ring-form turn 61.
In sum, precise linear displacement apparatus of the present invention produces power by the interaction of electromagnetic force and elastic force, and the concentric structure of each member guarantees accurately to control linear displacement.Simultaneously, there is not any friction and contacts in the motion process, thereby can avoid machinery noise, component wear.Motion is carried seat 5 rear and front ends and has been settled forward and backward leaf spring 32,31, and spring silk syndeton can guarantee that good anti-of device jolts, shock resistance in the middle of the inner and outer rings edge, has improved safe application performance.This apparatus structure is arranged compact, makes device become possibility according to application scenario demand miniaturization.
Described above only is a kind of performance of the present invention, and the present invention is not limited to the foregoing description form, only otherwise breaking away from purport of the present invention can do all modal changes.
Claims (7)
1, a kind of precise linear displacement apparatus, it is characterized in that, comprise: seat, electromagnetic drive unit, permanent magnet unit and elastic supporting seat are carried in housing, motion, permanent magnet unit is arranged in the housing, motion is carried seat and is installed in the described housing by elastic supporting seat, electromagnetic drive unit is fixed on motion and carries on the seat, when when electromagnetic drive unit is switched on, permanent magnet unit applies with described elastic supporting seat to described electromagnetic drive unit and carries seat opposite effect power to motion, and described electromagnetic drive unit drives described motion and carries seat and move under the effect of permanent magnet unit; Described electromagnetic drive unit is a ring-form turn, and it is the cylinder that a side has flange that seat is carried in described motion, and the ring-form turn coaxial package and fixes with described flange on cylinder, has appropriate gap between described ring-form turn and the described cylinder; Described flange and the contacted face of described ring-form turn are provided with groove, and the width of this groove is fixed on the flange ring-form turn less than the wall thickness of described ring-form turn by reach the groove internal sizing on the contact-making surface of described ring-form turn and flange.
2, a kind of precise linear displacement apparatus according to claim 1, it is characterized in that, described permanent magnet unit comprises the ring groove shape shell that magnetic shoe and ferrimagnet are made, the ring groove shape shell comprises outer shroud and interior ring, the radius of the outer circumference surface of magnetic shoe is identical with the inner surface radius of outer shroud, and circumferentially be arranged on the outer ring inner surface, the magnetic line of force direction of described magnetic shoe is for radially, described ring-form turn is sleeved between magnetic shoe and the interior ring, in the gap of described interior ring between described ring-form turn and described cylinder.
3, a kind of precise linear displacement apparatus according to claim 2, it is characterized in that, described elastic supporting seat comprises forward and backward leaf spring, described leaf spring comprises interior ring edge and the outer ring edge with concentric structure, link to each other by the spring silk between interior ring edge and the outer ring edge, the interior ring edge of described back leaf spring fixes by concavo-convex screens and described flange, and the interior ring edge of described preceding leaf spring also fixes with the other end relative with flange of described cylinder by concavo-convex screens.
4, a kind of precise linear displacement apparatus according to claim 3 is characterized in that, also offers louvre on the interior ring edge of described preceding leaf spring.
5, a kind of precise linear displacement apparatus according to claim 1 is characterized in that, described housing comprises front shroud and back shroud, is fixed togather by the back-off self-locking device between front shroud and the back shroud.
6, a kind of precise linear displacement apparatus according to claim 4 is characterized in that, also comprises a ring-type spacer, and this spacer is pressed against between the outer shroud of the outer ring edge of described back leaf spring and ring groove shape shell.
7, a kind of precise linear displacement apparatus according to claim 6 is characterized in that, also comprises an insulating trip, and this insulating trip is arranged between the outer ring edge and housing of described preceding leaf spring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100026020A CN100433510C (en) | 2007-01-24 | 2007-01-24 | Precise linear displacement apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100026020A CN100433510C (en) | 2007-01-24 | 2007-01-24 | Precise linear displacement apparatus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101013842A CN101013842A (en) | 2007-08-08 |
| CN100433510C true CN100433510C (en) | 2008-11-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2007100026020A Expired - Fee Related CN100433510C (en) | 2007-01-24 | 2007-01-24 | Precise linear displacement apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100433510C (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1602577A (en) * | 2002-09-10 | 2005-03-30 | Lg电子株式会社 | Reciprocating motor |
| CN2847327Y (en) * | 2005-10-13 | 2006-12-13 | 台睿科技股份有限公司 | Focusing driver |
| CN2879224Y (en) * | 2006-04-20 | 2007-03-14 | 大瀚光电股份有限公司 | Electromagnetism activated lens and magnetism conducting structure thereof |
| CN200962563Y (en) * | 2007-01-24 | 2007-10-17 | 宜兴市贵鑫磁电高科技有限公司 | Precise linear displacement device |
-
2007
- 2007-01-24 CN CNB2007100026020A patent/CN100433510C/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1602577A (en) * | 2002-09-10 | 2005-03-30 | Lg电子株式会社 | Reciprocating motor |
| CN2847327Y (en) * | 2005-10-13 | 2006-12-13 | 台睿科技股份有限公司 | Focusing driver |
| CN2879224Y (en) * | 2006-04-20 | 2007-03-14 | 大瀚光电股份有限公司 | Electromagnetism activated lens and magnetism conducting structure thereof |
| CN200962563Y (en) * | 2007-01-24 | 2007-10-17 | 宜兴市贵鑫磁电高科技有限公司 | Precise linear displacement device |
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| Publication number | Publication date |
|---|---|
| CN101013842A (en) | 2007-08-08 |
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