CN102205506B - Linear driving device with structure for clamping or switching cable - Google Patents
Linear driving device with structure for clamping or switching cable Download PDFInfo
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- CN102205506B CN102205506B CN201010145631.4A CN201010145631A CN102205506B CN 102205506 B CN102205506 B CN 102205506B CN 201010145631 A CN201010145631 A CN 201010145631A CN 102205506 B CN102205506 B CN 102205506B
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Abstract
The invention relates to a linear driving device. In the linear driving device, relative guiding pieces of a sliding block and an auxiliary sliding block can move on the same straight line and a structure that the auxiliary sliding block bears a counter action of a driving force of the driving sliding block is used; the weight of the auxiliary sliding block is enabled to be greater than that of the sliding block, therefore, the movement amount of the auxiliary sliding block is reduced. In addition, a cable connected with the sliding block is switched at the part of the auxiliary sliding block.
Description
Technical field
The present invention relates to possess slide block, the linear drive apparatus of auxiliary slider and guiding piece, relate in particular to and possess that cable on this guiding piece clamps or the linear drive apparatus of the structure of transferring to being connected to.
Background technology
Require high speed, high accuracy to drive to linear drive apparatus in the situation that, propose to eliminate the counteractive structure of the acceleration and deceleration of slide block.Fig. 5 represents the structure of the linear drive apparatus 200 of the counteractive mechanism that possesses the acceleration and deceleration of eliminating slide block.Guiding piece 14 use guiding piece fixed parts 16,18 as fixed part support its two ends.This linear drive apparatus 200 possesses bearing between the slide block 10 as movable part and guiding piece 14, and, between the auxiliary slider 12 as movable part and guiding piece 14, possess bearing.Slide block 10 can axially moving to the direction shown in arrow 28 along guiding piece 14.In addition, auxiliary slider 12 also can axially moving to the direction shown in arrow 26 along guiding piece 14.Linear drive apparatus 200 possesses driving mechanism (not shown) to produce the driving force of slide block 10 between slide block 10 and auxiliary slider 12.
According to said structure, the reaction that the acceleration and deceleration of slide block 10 cause is born by auxiliary slider 12, can not be delivered to guiding piece 14 and guiding piece fixed part 16,18.Linear drive apparatus 200 it is desirable to back and forth drive no matter how at high speed slide block 10, and the reaction force that the acceleration and deceleration of slide block 10 cause can not be delivered to the structure on slide block 14.In this linear drive apparatus, offset driving force, driving force not being delivered to structure on outside works, to be disclosed in Japanese documentation be No. 4072551 communique of patent.
Reciprocating motion in order to realize high speed, high-precision slide block is disclosed in above-mentioned patent documentation, and the linear drive apparatus being formed by the guide member of slider part and this slider part of guiding.This linear drive apparatus is configured to, on fixing pedestal, with FDB, guide sections part is carried out supporting with axle, and guide member and slider part can move on coaxial, and possesses the mechanism that produces thrust between guide sections part and above-mentioned slider part.
In order to drive slide block 10, the coil etc. that need to internally be loaded on the linear motor in this slide block 10 is supplied with electric power.In addition, the disclosed linear drive apparatus of above-mentioned patent documentation possesses Hydrostatic fluid bearing, therefore need to supply with from the outside of linear drive apparatus the fluids such as compressed air.
In Fig. 5, slide block 10 is supplied with to electric power and after 16 switchings of guiding piece fixed part, be connected with the external device (ED) such as supply unit or control device, fluid supply apparatus (not shown) of linear drive apparatus from slide block 10 with compressed-air actuated cable 20.Or cable 20 is directly connected with outside device without guiding piece fixed part 16.Linear drive apparatus is being required at a high speed and high-precision driving in the situation that, the action when not hindering slide block 10 to drive, need to carry out the processing of cable 20.
Aspect lathe, the technology of processing the driving workbench of (get り and return The) flexible pipe or cable on the workbench of place work piece etc. is disclosed in Japanese documentation, JP 63-162139 communique.In this technology, with workbench, auxiliary table is set abreast, flexible pipe or cable are fixed on this auxiliary table.Then, make this auxiliary table synchronize and move back and forth with workbench.And the reaction force that results from the bending force on flexible pipe or cable by the movement of workbench can not involve this workbench, can successfully carry out the feeding of workbench.
As described above, the direct drive shaft used in the machine or the like and the slider of the linear motor power lines, cable connections and the cable winds (which ma wa Kei also) so as not to interfere with the drive cable to the slide movement of the slider .Make slide block at high speed in reciprocating situation, cable runout rotation, but with regard to the slide block of ordinary construction, the impact that the reaction that the acceleration and deceleration of slide block cause produces more than the runout rotation of cable is large, therefore can ignore the impact that the runout rotation of cable produces.
But in No. 4072551 disclosed slide block that requires high-precision driving of communique of above-mentioned patent, even with high-speed driving, the reaction that the acceleration and deceleration of slide block cause is also very little.Therefore the impact that the known runout rotation that can not ignore cable produces.
In the linear drive apparatus 200 that possesses slide block 10 and auxiliary slider 12 and guiding piece 14 shown in Fig. 5, it is desirable to, the reaction of the acceleration and deceleration of slide block 10 is accepted by auxiliary slider 12.This structure is the counteractive structure without reaction that guiding piece fixed part 16,18 does not transmit the motion generation of slide block 10.
The middle part of the cable 20 being connected with this slide block 10 at the cable segment connector 22 being arranged on slide block 10 is fixed by the switching part 24 being arranged on this guiding piece fixed part 16 on guiding piece fixed part 16.In this structure, a part for the driving force of slide block 10 is delivered on guiding piece fixed part 16 by cable 20.Particularly, in the time that slide block 10 is moved back and forth at high speed, increase the runout rotation of cable 20, can add very important power to guiding piece fixed part 16, cannot become the structure without reaction.
By the length of jumper 20, can relax the springiness that cable 20 has, can reduce the power that guiding piece fixed part 16 is applied.But if slide block 10 moves back and forth at high speed, longer cable 20 runout rotations, vibrate or irregular motion, therefore can apply unnecessary power to guiding piece fixed part 16.Otherwise, if shorten cable 20, the elasticity (bending force) that cable 20 has strengthens, and the coupling part 22 of cable and the power of switching part 24 that while driving slide block 10, are applied to the two ends of cable 20 become large, and the power that is applied to guiding piece fixed part 16 from cable 20 becomes large.Therefore, can not eliminate while driving and be delivered to the power guiding piece fixed part 16 from cable 20.In other words, in existing cable handling, owing to being delivered to the power on guiding piece fixed part 16 by cable 20 and cannot becoming completely without reaction state.
In addition, even its middle part is not transferred or is clamped at guiding piece fixed part 16 at the cable 20 being connected with slide block 10, but in situation about being directly connected with external device (ED), link must be fixed with certain shape, therefore the driving force based on slide block 10 is delivered to the reason of external device (ED) etc. by cable 20, does not similarly become without reaction.In addition, also can be contrary with the structure object of this linear drive apparatus of " offsetting driving force in linear drive apparatus ".The occasion being fixed on external device (ED) for the middle part of the cable 20 between slide block 10 and guiding piece fixed part 16 does not become too without reaction.
In order to suppress the reaction force from cable, as disclosed in above-mentioned JP 63-162139 communique, consideration is used the structure of auxiliary table.But also need to arrange auxiliary table and auxiliary table is driven to the mechanism controlling, can cause maximization, expensiveization of device, the electric energy of consumption to increase as linear drive apparatus entirety.
Summary of the invention
So the power that the object of this invention is to provide a kind of cable generation is difficult to transmit or be not delivered to the linear drive apparatus of outside structure.
Linear drive apparatus of the present invention has as the slide block of movable part, as the auxiliary slider of movable part and as the guiding piece of fixed part, above-mentioned slide block is configured to relative to above-mentioned guiding piece and can on same straight line, moves by bearing with above-mentioned auxiliary slider, possess between above-mentioned auxiliary slider and above-mentioned slide block and produce the driving mechanism of the driving force of above-mentioned slide block, and make above-mentioned auxiliary slider and bear the counteractive structure of driving force that drives above-mentioned slide block.And in this linear drive apparatus, the cable being connected with above-mentioned slide block is held or transfers at above-mentioned auxiliary slider, and, the Heavy Weight of the above-mentioned slide block of weight ratio of above-mentioned auxiliary slider.
Above-mentioned cable also can be again held or transfers at above-mentioned guiding piece or the guiding piece fixed part that supports above-mentioned guiding piece.
Above-mentioned linear drive apparatus also can have the multi-cable being connected on this linear drive apparatus, and these many above-mentioned cables are with respect to the driving shaft axis of orientation separate configuration symmetrically of above-mentioned slide block and above-mentioned auxiliary slider.
The present invention is owing to possessing above structure, thereby can provide a kind of power producing on cable to be difficult to transmit or be not delivered to the linear drive apparatus of outside structure.
Accompanying drawing explanation
Fig. 1 be explanation by after the middle part of cable auxiliary slider clamping or switching, then after the clamping of guiding piece fixed part or switching with the figure of outside the first embodiment that be connected, linear drive apparatus of the present invention.
Fig. 2 is explanation configures second embodiment cable, linear drive apparatus of the present invention of dual system axisymmetrically figure with respect to the driving shaft of slide block and auxiliary slider.
Fig. 3 A is general profile chart when (arrow H) cuts off the linear drive apparatus shown in Fig. 1 in the horizontal direction.
Fig. 3 B is general profile chart when (arrow V) cuts off the linear drive apparatus shown in Fig. 1 in the vertical direction.
Fig. 4 be explanation at auxiliary slider by after the middle part clamping of cable or switching, then after the clamping of guiding piece part or switching with the figure of outside the 3rd embodiment that be connected, linear drive apparatus of the present invention.
Fig. 5 is the figure of the structure of an example of the linear drive apparatus of explanation prior art.
The specific embodiment
Fig. 1 be explanation by the middle part of cable after auxiliary slider clamping or switching, then after the clamping of guiding piece fixed part or switching the figure of an embodiment that be connected with external device (ED), linear drive apparatus of the present invention.
In linear drive apparatus 300, with regard to one end being connected to the cable 30 on the cable segment connector 32 of being located at slide block 10, by its middle part after the switching part 34 of being located at auxiliary slider 12 is transferred, transfer in the switching part 36 of being located at guiding piece fixed part 16 again, then, the other end is connected with outside device (not shown) etc.In the switching part 34,36 of auxiliary slider 12 and guiding piece fixed part 16, the middle part of cable 30 uses hook or the fastened tools be located on auxiliary slider 12 and guiding piece fixed part 16 to fix.
Guiding piece fixed part 16 from cable 30 to be connected to part between slide block 10 and auxiliary slider 12 stressed.As mentioned above, enough large if the weight of auxiliary slider 12 is compared the weight of slide block 10, the amount of movement of auxiliary slider 12 and translational speed become very little.Therefore, being delivered to the power of guiding piece fixed part 16 from this cable 30 compares and reduces significantly with the cable handling structure of the linear drive apparatus 200 shown in Fig. 5.
Fig. 2 is explanation configures second embodiment cable, linear drive apparatus of the present invention of dual system axisymmetrically figure with respect to the driving shaft of slide block and auxiliary slider.
In the linear drive apparatus 300 of the first embodiment illustrated in fig. 1, with respect to driving shaft (linear axis at the bearing portion center by guiding piece 14), the processing structure of cable 30 is only arranged on one-sided and becomes asymmetric.Therefore the power, slide block 10, auxiliary slider 12, guiding piece fixed part 16 being subject to from cable adds the power (moment) beyond driving shaft direction.But the driving force that will offset of linear drive apparatus 300 is the axial driving force of driving of slide block 10 and auxiliary slider 12, moment is not cancelled.Therefore,, in order to carry out desirable driving without reaction, wish to eliminate with respect to the asymmetrical movable key element of driving shaft.
So, in order to solve this technical problem, in the linear drive apparatus 400 shown in Fig. 2, configure symmetrically the cable of dual system with respect to driving shaft.In this embodiment, by carry out the processing of cable 40,41 with respect to driving shaft as axisymmetric mode, thereby the composition beyond the driving shaft direction of the power that slide block 10, auxiliary slider 12 and guiding piece fixed part 16 are subject to from cable 40,41 is cancelled.Therefore, utilize the processing structure of this cable, improve the linearity precision in the driving of for example slide block 10.
At this, the processing of the cable 40,41 being connected on linear drive apparatus 400 is described.In linear drive apparatus 400, one end is connected to cable 40 on the cable segment connector 42 of being located at slide block 10 after the switching part 44 of being located at auxiliary slider 12 is by its middle part switching, again after switching part 46 switching of being located at guiding piece 14, the other end is connected with outside device (not shown) etc.In the switching part 44,46 of auxiliary slider 12 and guiding piece 14, the middle part of cable 40 uses hook or the fastened tools be located on auxiliary slider 12 and guiding piece 14 to fix.
On the other hand, one end is connected to another cable 41 on the cable segment connector 43 of being located at slide block 10 be located at switching part 45 on auxiliary slider 12 by its middle part switching after, again after switching part 47 switching of being located at guiding piece 14, the other end is connected with outside device (not shown) etc.In the switching part 45,47 of auxiliary slider 12 and guiding piece 14, the middle part of cable 41 uses hook or the fastened tools of being located at auxiliary slider 12 and guiding piece 14 to fix.In Fig. 2, although the switching part 45,47 of cable segment connector 43, auxiliary slider 12 and guiding piece 14 does not directly illustrate, these parts switching part 44,46 of side and cable segment connector 42, auxiliary slider 12 and guiding piece 14 below slide block 10, auxiliary slider 12, guiding piece 14 similarly configures.
By cable 40 and cable 41 are configured axisymmetrically with respect to driving shaft as described above, thereby can offset the moment separately being produced by cable 40 and cable 41.Further, the switching part 46,47 of being located at guiding piece 14 is arranged on the position of the action that does not hinder auxiliary slider 12.
Due to cable is made to dual system, thereby compared with when making single system, increase the load of the cable that the driving mechanism to driving slide block 10 gives.In occasion of above-mentioned employing pressure-feed air bearing etc., owing to originally needing these two systems of cable of air fed pipe and supply electric power, therefore, not to use cable and pipe in order to configure cable symmetrically, the loading condition that increases cable can't become defect.In addition, even the cable that only electric power is used also must need plural cable core in order to supply with electric power, therefore, even also can be divided into dual system in this occasion.
In addition, narrate above with respect to the asymmetry of driving shaft about cable, but for the slide block 10 as movable part and auxiliary slider 12, if because weight balancing is separately asymmetrical words with respect to driving shaft, in the time driving, produce moment, therefore can not become desirable driving without moving.The movable entire infrastructure relative drive shaft that preferably comprises cable is symmetrical structure.
Secondly, use Fig. 3 A and Fig. 3 B to describe the driving mechanism that drives slide block.
In addition, on slide block 10, be equipped with reversion and use magnet 4c, on auxiliary slider 12, be also equipped with in addition reversion magnet 4b.At the stroke two ends of slide block 10, the reversion of slide block side approaches with the reversion magnet 4b of magnet 4c and auxiliary slider side.Now, act on such magnet direction between the reversion magnet 4b of auxiliary slider side and the reversion magnet 4c of slide block side at repulsion and configure these magnet 4b, 4c.By this structure, slide block 10 is not obtained power from outside at stroke two ends, only utilizes the repulsion of magnet 4b, 4c to reverse.The repulsion being produced by magnet 4b, 4c preferably relative drive shaft produces symmetrically.Further, same structure is disclosed in No. 4072551 communique of patent of having narrated above with it.
Fig. 4 represents cable after the auxiliary slider of linear drive apparatus clamps or transfers, the example that this cable is connected with the outside of this linear drive apparatus.In this linear drive apparatus 500, be supported on the guiding piece 64 as fixed part by axle as the auxiliary slider 62 of movable part, and, be supported on above-mentioned auxiliary slider 62 by axle as the slide block 60 of movable part.
As shown in Figure 4, its one end is connected on the cable segment connector 52 of slide block 60 cable 50.And, cable 50 its middle parts that extend from this cable segment connector 52 are switching part 54 switchings of auxiliary slider 62, the switching part 56 that further extends in guiding piece 64 is transferred, and then extend to the outside of linear drive apparatus 500, the other end is connected with outside device (not shown).In the switching part 54 of auxiliary slider 62 and the switching part 56 of slide block 64, the middle part of cable 50 is fixed by hook or the fastened tools of being located at auxiliary slider 62 and guiding piece 64.
Cable 50 shown in cable 40 and 41 shown in cable 30 shown in Fig. 1, Fig. 2, Fig. 4 is respectively a continuous cable, as mentioned above, use hook or fastened tools that the middle part clamping (fix) of cable is being arranged at respectively on auxiliary slider 12,62 and guiding piece 14,64 (or replacement guiding piece and with guiding piece fixed part 16).The continuous cable that, the cable shown in Fig. 1, Fig. 2 and Fig. 4 is in the switching part that one end is connected to slide block and the other end is connected with external device (ED).
Also can replace said structure, in the switching part being disposed at respectively on auxiliary slider and guiding piece (or guiding piece fixed part), use connector or U-shaped pipe etc. that cable is connected in turn, thereby can realize the same effect of structure of the cable continuous with one of above-mentioned use.
In addition, above said cable refers to and comprises the pipe etc. of powering the distribution of use and supply with fluid (liquid, gas) for the bearing portion of convection cell bearing at interior parts.
Claims (3)
1. a linear drive apparatus, have as the slide block of movable part, as the auxiliary slider of movable part and as the guiding piece of fixed part, above-mentioned slide block is configured to relative to above-mentioned guiding piece and can on same straight line, moves by bearing with above-mentioned auxiliary slider, possesses the driving mechanism that produces the driving force of above-mentioned slide block between above-mentioned auxiliary slider and above-mentioned slide block, and make above-mentioned auxiliary slider and bear the counteractive structure of driving force that drives above-mentioned slide block, it is characterized in that
The cable being connected with above-mentioned slide block is held or transfers at above-mentioned auxiliary slider,
The Heavy Weight of the above-mentioned slide block of weight ratio of above-mentioned auxiliary slider,
Above-mentioned slide block possesses coil and the first reversion magnet;
Above-mentioned auxiliary slider possesses magnet and the second reversion magnet,
And, at the stroke two ends of above-mentioned slide block, configuration is reversed by the direction of magnet as follows:, in the time that above-mentioned the first reversion approaches with magnet with magnet and above-mentioned the second reversion, between above-mentioned the first reversion is reversed with magnet with magnet and above-mentioned second, produce repulsion.
2. linear drive apparatus according to claim 1, is characterized in that,
Above-mentioned cable is also held or transfers at above-mentioned guiding piece or the guiding piece fixed part that supports above-mentioned guiding piece.
3. linear drive apparatus according to claim 1 and 2, is characterized in that,
Above-mentioned linear drive apparatus has the multi-cable being connected on this linear drive apparatus, and these many above-mentioned cables are with respect to the driving shaft axis of orientation separate configuration symmetrically of above-mentioned slide block and above-mentioned auxiliary slider.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010145631.4A CN102205506B (en) | 2010-03-29 | 2010-03-29 | Linear driving device with structure for clamping or switching cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010145631.4A CN102205506B (en) | 2010-03-29 | 2010-03-29 | Linear driving device with structure for clamping or switching cable |
Publications (2)
| Publication Number | Publication Date |
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| CN102205506A CN102205506A (en) | 2011-10-05 |
| CN102205506B true CN102205506B (en) | 2014-07-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201010145631.4A Active CN102205506B (en) | 2010-03-29 | 2010-03-29 | Linear driving device with structure for clamping or switching cable |
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Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002283174A (en) * | 2001-03-26 | 2002-10-03 | Fanuc Ltd | Linear drive |
| US6937911B2 (en) * | 2002-03-18 | 2005-08-30 | Nikon Corporation | Compensating for cable drag forces in high precision stages |
| JP2005027469A (en) * | 2003-07-01 | 2005-01-27 | Yokogawa Electric Corp | Flat surface motor arrangement |
| JP4586088B2 (en) * | 2008-08-19 | 2010-11-24 | ファナック株式会社 | Reciprocating linear drive device |
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