CN102116331A

CN102116331A - Linear actuator

Info

Publication number: CN102116331A
Application number: CN2011100099579A
Authority: CN
Inventors: 石桥康一郎; 高梨精二; 佐藤太平; 政所二朗; 原耕二; 佐藤俊夫
Original assignee: SMC Corp
Current assignee: SMC Corp
Priority date: 2010-01-05
Filing date: 2011-01-05
Publication date: 2011-07-06
Anticipated expiration: 2031-01-05
Also published as: DE102010056367A1; JP5704528B2; TWI513912B; KR101717607B1; CN102116331B; JP2011158085A; KR20110081048A; TW201139862A

Abstract

A linear actuator (10) includes a cylinder main body (12). With respect to the cylinder main body (12), a slide table (14) is disposed for reciprocal displacement through a guide mechanism (16), which is disposed on the cylinder main body. A stopper mechanism (18) having a stopper bolt (82) is disposed on one end of the slide table (14) centrally in a widthwise direction perpendicular to the longitudinal direction of the slide table (14). In addition, when the slide table (14) is displaced along the cylinder main body (12), one end of the stopper bolt (82) comes into abutment with an end of a cover (96) of the guide mechanism (16), whereupon the slide table (14) becomes engaged therewith and movement of the slide table (14) is stopped.

Description

Linear actuating device

Technical field

The present invention relates to a kind of linear actuating device,, can make the axially reciprocating of sliding stand along cylinder body by importing pressure fluid from the fluid import/export.

Background technique

Up to now, adopted as the means of transmission workpiece by the linear actuating device of making such as fluid pressure cylinder etc. (linear actuator).In Japanese Utility Model No.2586276, the applicant has proposed a kind of linear actuating device, by sliding stand (slide table) is moved back and forth on straight line along cylinder body (cylinder main body), this device can transport the workpiece that is carried on the sliding stand.

Further, open among the flat No.2008-057679 in Japanese patent publication, disclosed a kind of linear actuating device that is equipped with acyclic guiding mechanism, wherein, a plurality of steel balls are arranged in the main body between guiding rail and the sliding stand, thereby steel ball is being followed the displacement of sliding stand and is being shifted.

Yet, have as described above Japanese patent publication and open the conventional art that discloses among the flat No.2008-057679, for example, when sliding stand in nonequilibrium load by under the situation about being applied in during displacement with respect to this sliding stand, steel ball on guiding rail left side and right side can be shifted, and be accompanied by such displacement, the situation of sliding stand inclination (crooked) may take place.

Summary of the invention

Overall purpose of the present invention is to provide a kind of linear actuating device, this linear actuating device can be reliably and is stably stopped to move of sliding stand, and meanwhile, can suppress the generation of motion in the moment that sliding stand is stopped, thereby suppress the inclination of sliding stand, simultaneously can also simplified design, and improve the use simplification of linear actuating device.

The present invention is a kind of linear actuating device, in this linear actuating device, by importing pressure fluid from the fluid import/export, can make sliding stand along the axially reciprocating of cylinder body, and this linear actuating device comprises:

The cylinder body that is communicated with the import/export, this cylinder body have pressure fluid and are injected into wherein a pair of cylinder chamber;

Sliding stand along the axially reciprocating of cylinder body;

Cylinder mechanism with pair of pistons, this can slide along the cylinder chamber to piston, and sliding stand moves back and forth under the effect of the shift motion of piston;

Be used for along the guide mechanism of the axial guiding sliding stand of cylinder body, this guide mechanism is attached on the cylinder body, and has the flat guide slide block (guide block) that is formed with first circulation canal in inside, and a plurality of rolling elements roll in circulation canal and circulate; And

Be arranged at the stop mechanism of the central authorities of an end on width direction of sliding stand, be used to regulate moving back and forth of sliding stand, this width direction is perpendicular to the axial direction of sliding stand,

Wherein, stop mechanism moves with sliding stand, and against the end of guide runner.

According to the present invention, in this cylinder body, have in the linear actuating device of pair of pistons, the stop mechanism that moves back and forth that is used to regulate sliding stand is arranged on the central authorities of an end on width direction of sliding stand, and wherein, sliding stand axially moves back and forth along cylinder body.In addition, when sliding stand moved back and forth by the cylinder mechanism that wherein comprises piston, the stop mechanism that moves with sliding stand was against an end of the guide runner of guide mechanism, thereby prevented moving of sliding stand.

Therefore, because stop mechanism is arranged on the central authorities of an end on width direction of sliding stand, when stop mechanism against an end of guide runner and when engaging, suppress the generation of moving of side direction when linear actuating device top is seen, and can avoid the inclination of contingent sliding stand when sliding stand engages with guide runner.As a result, moving of sliding stand can be by the reliable and stable prevention of stop mechanism.

Above-mentioned and other purposes, feature and advantage of the present invention become apparent in combining the following specification of accompanying drawing, and the preferred embodiments of the present invention show in the accompanying drawings by illustrated example.

Description of drawings

Fig. 1 is the exterior perspective view according to the linear actuating device of the first embodiment of the present invention;

Fig. 2 is the exploded perspective view under the state that shows sliding stand and upwards separate from the linear actuating device shown in Fig. 1;

Fig. 3 is the exploded perspective view of linear actuating device shown in Figure 1 when look in the visual angle, below;

Fig. 4 is the whole sectional elevation figure of linear actuating device shown in Figure 1;

Fig. 5 is the sectional view along V-V line among Fig. 4;

Fig. 6 is the sectional view along VI-VI line among Fig. 4;

Fig. 7 is the sectional view along VII-VII line among Fig. 4;

Fig. 8 is the exterior perspective view of the guide mechanism of a formation linear actuating device part shown in Figure 1;

Fig. 9 is the exploded perspective view of guide mechanism shown in Figure 8; With

Figure 10 is whole sectional elevation figure, the state of the end plate of sliding stand along away from the displacement of the direction of cylinder body time the in the linear actuating device shown in the displayed map 4;

Figure 11 is the exterior perspective view of linear actuating device according to a second embodiment of the present invention;

Figure 12 is the exploded perspective view when look in the visual angle below linear actuating device shown in Figure 11;

Figure 13 is the whole sectional elevation figure of linear actuating device shown in Figure 11;

Figure 14 is the sectional view along XIV-XIV line among Figure 13;

Figure 15 is the sectional view along XV-XV line among Figure 14;

Figure 16 is whole sectional elevation figure, shows the state of the end plate of sliding stand in the linear actuating device shown in Figure 13 away from cylinder body;

Figure 17 is the exterior perspective view according to the linear actuating device of modified example of the present invention;

Figure 18 is the exploded perspective view of linear actuating device shown in Figure 17 when look in the visual angle, below;

Figure 19 is the sectional view of the linear actuating device that shows of Figure 17;

Figure 20 is the front view of the linear actuating device of a third embodiment in accordance with the invention;

Figure 21 is the cross-sectional view of linear actuating device shown in Figure 20.

Embodiment

In Fig. 1, the linear actuating device that reference character 10 indicates according to the first embodiment of the present invention.

Shown in Fig. 1 to 10, linear actuating device 10 comprises cylinder body 12, sliding stand 14, guide mechanism (guide mechanism) 16 and stop mechanism (stopper mechanism) 18.Wherein, sliding stand 14 is positioned at the top of cylinder body 12, moves back and forth at length direction (direction shown in arrow A and the B) upper edge straight line; The position of guide mechanism 16 is used for going up the described sliding stand 14 of guiding at length direction (direction shown in arrow A and the B) between cylinder body 12 and sliding stand 14; Stop mechanism 18 can be adjusted the displacement amount of sliding stand 14.

Cylinder body 12 has the rectangular cross-section, and has predetermined length on length direction (direction shown in arrow A and the B).The depression 20 that the cross section is sagging bowed shape roughly is formed on the middle part of cylinder body 12 upper surfaces, and (direction shown in arrow A and the B) extends along its length.In the depression 20, be provided with a pair of penetrating

keyhole

24a, 24b,

coupling bar

22a, 22b insert this keyhole and are used for cylinder body 12 and guide mechanism 16 are linked together.

In addition, as shown in Figure 5, on a side surface of cylinder body 12, be formed with first and second mouthfuls of (fluid import/exports) 26 and 28, be used for the supply and the release of pressure fluid.First and

second mouthful

26 and 28 length directions perpendicular to cylinder body 12, and be communicated with a pair of through hole that is described further below (cylinder chamber) 30a, 30b.In addition, on the surface of cylinder body 12 other sides, alongst the position of (direction shown in arrow A and the B) is formed with two sensor attachment grooves 32 respectively, and the sensor (not shown) just is installed in this attachment groove.

Shown in Fig. 3 and 4, the middle part of the bottom surface of cylinder body 12 on its width direction (direction shown in the arrow C) is formed with a pair of

keyhole

24a, 24b along

axis.Coupling bar

22a, 22b insert logical keyhole 24a from the below, 24b, and it upwards penetrates cylinder body 12.

Coupling bar 22a, the head 33 of 22b is made up of flush bolt (flush bolt), and this flush bolt has in the direction of separating with helical thread portion (as the downward direction among Fig. 4) goes up the conical in shape that diameter launches gradually.Bolt hole 24a, the expansion diameter parts 35 of 24b also form the conical in shape that the lower face side diameter towards cylinder body 12 launches gradually, thus with conical nose 33 butts.

And, coupling bar 22a, the helical thread portion of 22b is outstanding from the upper surface of cylinder body 12, and the guide runner (guide block) 92 by screwed joint and guide mechanism 16 interconnects.At this moment, as shown in Figure 4, because coupling bar 22a, head 33 on the 22b and bolt hole 24a, the expansion diameter parts 35 of 24b is by the conical surface butt, in addition with respect to guide runner 92 along substantially horizontal (direction shown in arrow A and B) when applying load, because conical surface directly engages,

coupling bar

22a, 22b can be perpendicular to the direction of axis (that is, along arrow A and B direction) superior displacements.

Given this, guide runner 92 firmly is fixed on the state of always suitably being located with respect to cylinder body 12.Under other situations, because

coupling bar

22a, 22b are being conditioned perpendicular to the slippage on the direction of axis (displacement), guide runner 92 is maintained at the state of hi-Fix, meanwhile, can be by the shift amount of stop mechanism (stopper mechanism) 18 sliding stands that stop 14 by the control of pinpoint accuracy ground.

Further, on the lower surface of cylinder body 12, middle part on width direction (direction shown in the arrow C) is formed with a pair of

first positioning hole

29a, 29b along axis, thereby, for example, insert the logical

first positioning hole

29a, 29b and enter other equipment by pin when being fixed on another equipment or the analog (not shown) when the cylinder body 12 of linear actuating device 10, its relative positioning is done.

Shown in Fig. 3 and 4, the

first positioning hole

29a, 29b are adjacent to

bolt hole

24a, 24b forms, thereby one first positioning hole 29a is formed in rounded the penetrating of one distolateral (on the direction shown in the arrow A) of cylinder body 12, and the piston rod 38 that will describe after a while is from this distolateral stretching out of cylinder body 12; Another the first positioning hole 29b that is formed on another distolateral (on the direction shown in the arrow B) of cylinder body 12 is formed ellipse or square circle (oblong) shape, and its major diameter is along axially (direction shown in arrow A and the B) extension.

By such mode, by the

first positioning hole

29a, 29b are set on the axis of cylinder body, the linear actuating device 10 that will comprise cylinder body 12 is attached and when navigating to other equipment when carrying out, and operation can easily be carried out.

On the other hand, as shown in Figure 5, the inside of cylinder body 12 is formed with two through

hole

30a, 30b, and these two through

hole

30a, 30b (direction shown in arrow A and the B) along its length connect, one of them through hole 30a and another one through hole 30b are arranged as almost parallel each other, and predetermined at interval distance.The inside of through

hole

30a and 30b is provided with cylinder mechanism (cylinder mechanism) 40, and this cylinder mechanism 40 comprises piston 37 and the piston rod 38 that links to each other with piston 37 separately.The periphery of each piston 37 all is equipped with seal ring 34.

Cylinder mechanism 40 is made of the paired piston 37 and the piston rod 38 that are installed in respectively among a pair of through hole 30a, the 30b.Further, on the outer surface of a piston 37, magnet 36 is installed side by side with seal ring 34.Magnet 36 only is set in place on the piston 37 of sensor attachment groove 32 sides in cylinder body 12.By being installed in the detecting sensor (not shown) in the sensor attachment groove 32, the magnetive attraction of magnet 36 is detected, thereby piston 37 is detected along axial shift position.

Further, the piston vibration damper of ring-type (piston damper) 41 is arranged on the end of piston 37, is positioned at rod bearing (rod holder) 46 sides (along the direction shown in the arrow A) that are described after a while.For example, even without stop mechanism 18 is set, by under the situation of rod bearing 46 sides (along direction shown in the arrow A) displacement, piston 37 is stopped against rod bearing 46 by piston vibration damper 41, and suitably absorbs impact by buffer piston district 41 at piston 37.

To cover 42 sealings and sealing, the other end of through

hole

30a, 30b is by 46 hermetic sealings of rod bearing at the one end for through

hole

30a, 30b, and rod bearing 46 is maintained in the through hole by locking ring (locking ring) 44.The periphery of rod bearing 46 is equipped with O shape ring by circular groove, thereby prevents to leak the slit of pressure fluid between through

hole

30a, 30b and rod bearing 46.

In addition, one of them through hole 30a is communicated with first and

second mouthful

26,28 respectively, and another one through hole 30b is also by being formed on a pair of connecting passage 50 and the through hole 30a interconnection between this through hole 30a and the another one through hole 30b.More specifically, a through hole 30a is supplied and be imported into to pressure fluid from first and second mouthful 26,28.Afterwards, pressure fluid also is imported into the another one through hole by connecting passage 50.Connecting passage 50 forms perpendicular to the bearing of trend of through

hole

30a, 30b (direction shown in arrow A and the B).

The end plate 54 that sliding stand 14 comprises disk body (table main body) 52, the stop mechanism (stopper mechanism) 18 that links to each other with disk body 52 1 ends and links to each other with disk body 52 the other

ends.End plate

54 and 52 vertical connections of disk body.

Disk body 52 is made of the base portion 56 that extends along its length with preset thickness and a pair of guide wall (wall portion) 58a, the 58b that extend straight down from the both sides of base portion 56.Be formed with first bal guide 62 on the internal surface of

guide wall

58a, 58b, be used to guide the guiding ball (rolling element) 60 (will in hereinafter describe) of guide mechanism 16.First bal guide, 62 depressions, the cross section is semicircular in shape roughly.Further, base portion 56 forms with

guide wall

58a, 58b and has roughly the same thickness size (see figure 7).

In addition, be formed with a pair of first keyhole 68 on the end of disk body 52, bolt (fastening piece) 66a inserts this keyhole 68, is used for fixing in seat part (holder portion) (retaining member) 64 of the stop mechanism of hereinafter describing 18.Be formed with a pair of second keyhole 70 on the other end of disk body 52, bolt 66b inserts this keyhole 70 and is used for fixing end plate 54.First and

second keyholes

68 and 70 run through the bearing of trend of direction perpendicular to disk body 52.

Four workpiece retaining holes (work piece retaining holes) 72 are formed between the end and the other end of base portion 56.The distance that workpiece retaining hole 72 spaces are predetermined, and, for example, the target that has when the workpiece (not shown) is mounted and is transferred to the top of sliding stand 14 the workpiece fix in position is set.

And when sliding stand 14 was shifted on the top of cylinder body 12, workpiece retaining hole 72 was arranged as the medial side (see figure 7) on width direction towards cylinder body 12 and guide runner 92 with respect to being arranged on lip-deep second bal guide 74 of guide runner 92 offsides.In other words, workpiece retaining hole 72 is arranged in the sliding stand 14, is positioned at from the position of second bal guide, 74 inboards of guide runner 92.

Further, shown in Fig. 1 to 4, a pair of

second positioning hole

75a, 75b are formed in the base portion 56, and unshowned pin is inserted into this a pair of

second positioning hole

75a, 75b, is used for the middle part of workpiece (not shown) on the width direction of base portion 56 located along axis.The

second positioning hole

75a, 75b are along base portion 56 length directions (direction shown in an arrow A and the B) predetermined distance separated from one another.One the second positioning hole 75a that is arranged in end plate 54 sides (in the direction of arrow A) forms and penetrates it and have round-shaped, yet another the second positioning hole 75b that is arranged in stop mechanism 18 sides (along the direction of arrow B) forms ellipse or square circle (oblong) shape, and its major diameter is along extending axially.

By such mode, the

second positioning hole

75a, 75b are set on the axis by the base portion in sliding stand 14 56, when carrying out the workpiece installation and being positioned on the sliding stand 14, this operation can easily be carried out.

End plate 54 is fixed by inserting two bolt 66b that wear second keyhole 70 that is formed on disk body 52 the other ends, and is configured to the end surfaces towards cylinder body 12.End plate 54 also is fixed to the end of piston rod 38, and this piston rod 38 is inserted and worn among a pair of bar hole 76a, the 76b that is formed in the end plate 54.Therefore, the sliding stand 14 that comprises end plate 54 can move with the length direction (direction arrow A and B shown in) of piston rod 38 along cylinder body 12.

In addition, the position on the end plate 54, between a bar hole 76a and another one bar hole 76b is formed with vibration damper mounting hole (damper installation hole) 80, and vibration damper 78 is installed on wherein.When an other side that is arranged in cylinder body 12 sides from end plate 54 when the vibration damper of being made by the elastic material of rubber etc. 78 was installed (insertions) to vibration damper mounting hole 80, its end was along diameter expansion, and from the outside projection in the surface of an other side.

Because vibration damper mounting hole 80 is formed on the neutral position on the width direction (direction shown in the arrow C) of end plate 54, vibration damper 78 is installed in the neutral position on the width direction of end plate 54.

More specifically, when end plate 54 is shifted with sliding stand 14, by connecting from the end surfaces of other one of end plate 54 side-prominent vibration damper 78 with cylinder body 12, if originally troubling end plate 54 directly and cylinder body 12 be able to be avoided against vibration that is produced and noise.

Further, because vibration damper 78 is disposed generally on the neutral position of the width direction (direction shown in the arrow C) of end plate 54, when sliding stand 14 is shifted, and when the end surfaces butt of end plate 54 by vibration damper 78 and cylinder body 12 stops, when the top of linear actuating device 10 is seen, transversely mobile being suppressed of direction (left and right directions).

Stop mechanism 18 comprises the seat part 64 that is arranged on the disk body 52 1 end lower surfaces, the dogbolt (stopper bolt) 82 that cooperates with seat part 64 spirals and is used to regulate the lock nut (lock nut) 84 that dogbolt 82 advances or bounces back and move.Stop mechanism 18 is arranged to towards an end surfaces that is positioned at the guide mechanism 16 on the cylinder body 12.

Seat part 64 forms block-shaped, and by two bolt 66a that insert from the top through first keyhole 68 from upper fixed on the base portion 56 of the disk body 52 of sliding stand 14.Seat part 64 comprises first lug boss 86 of downward protrusion, and its cross section is arc in the approximate mid-section of this seat part 64.Central authorities in the seat part 64 that comprises first lug boss 86 are formed with screw (screw hole) 88, and dogbolt 82 spirals adapt to wherein.Screw 88 runs through seat part 64, is roughly parallel to the bearing of trend of disk body 52.

More specifically, because of screw 88 is arranged on the central authorities of the seat part 64 with first lug boss 86, so, to compare with the situation that first lug boss 86 is not set, screw 88 can be formed on lower slightly position.

In addition, in seat part 64, first lug boss 86 extends vertically, makes that first lug boss 86 can be inserted the depression 20 of wearing cylinder body 12 when sliding stand 14 is shifted along its length.

Dogbolt 82 for example, can be made by capable shaft-like (shank-shaped) stud (stud bolt) that is carved with screw thread of outer surface.The length of dogbolt 82 make its with situation that screw 88 spirals of seat part 64 cooperate under this dogbolt 82 can from screw 88, stretch out.In addition, lock nut 84 is adaptive from zone and dogbolt 82 spirals that seat part 64 1 end surfaces stretch out at dogbolt 82.

In addition, by with respect to seat part 64 screw thread rotation dogbolts 82, dogbolt 82 is (direction shown in arrow A and the B) displacement vertically, thus near or away from guide mechanism 16.For example, after thereby dogbolt 82 rotations are given prominence to predetermined length towards guide mechanism 16 sides (direction shown in the arrow A), locking nut 84 is moved by screw thread rotation and against the side of seat part 64, thus regulate dogbolt 82 advance by leaps and bounds or bounce back mobile.

In addition, the cushioning members of making by elastic material (shock-absorbing member) 90 from the end of dogbolt 82 towards the length of guide mechanism 16 outstanding appointments.The purpose that cushioning members 90 is set is to be buffered under the shift motion of sliding stand 14 dogbolt 82 and supports and bump the vibration that guide member 16 end faces are caused.

Shown in Fig. 8 and 9, guide mechanism 16 comprises wide and flat guide runner 92, is arranged at a pair of ball circulating member (circulating member) 94a and 94b on the guide runner 92, a pair of cover plate 98 that ball 60 can circulate in this a pair of ball circulating member (circulating member) 94a and 94b, be installed in a pair of lid (cover) 96 on guide runner 92 opposite ends along its length respectively and cover 96 surface respectively.

Second bal guide 74 is formed on the both side surface of guide runner 92 along its length.Near zone at second bal guide 74 is penetrated with a pair of mounting groove (opening) 100a, 100b along its length, and

ball circulating member

94a, 94b promptly embed wherein.Second bal guide, 74 cross section semicirculars in shape, when sliding stand 14 was arranged on the top of guide mechanism 16, second bal guide 74 was in the position relation relative with first bal guide 62.

Mounting

groove

100a, 100b are formed on the lower surface of guide runner 92, and the cross section is rectangular, and opening and is in relative two ends at length direction down.

It is roughly rectangular that

ball circulating member

94a, 94b form the cross section, corresponding with mounting

groove

100a, 100b, and have the ball-recirculation hole (second circulation canal) 102 through self inside, and ball 60 is capable of circulation in this passage.On the relative two end part of

ball circulating member

94a, 94b, be respectively arranged with rolling counter-rotating portion (roll-reversing sections) 104a, 104b, be used to reverse the loop direction of ball 60.The rolling counter-rotating 104a of portion, 104b form has semi-circular cross-section, and the ball grooves that ball 60 rolls therein is formed on the outer surface of the rolling counter-rotating 104a of portion, 104b.Such ball grooves and ball-recirculation hole 102 form uninterrupted connection.

More specifically, ball 60 rolls out in the ball-recirculation hole 102 from

ball circulating member

94a, 94b, turns to 180 ° to enter first and second bal guides (circulation canal) 62,74 that are positioned at ball circulating member 94a, the 94b outside by the rolling counter-rotating 104a of portion, 104b.

Ball circulating member

94a, 94b are arranged in the guide runner 92, make the position in ball-recirculation hole 102 be lower than first and second bal guides 62,74.Particularly, the predetermined height of ball-recirculation hole 102 and first,

second bal guide

62,74 in the vertical directions (direction shown in arrow C among Fig. 7) deviation.

In addition, when

ball circulating member

94a, 94b are inserted among mounting groove 100a, the 100b of guide runner 92, the planar surface portion 108 of the rolling counter-rotating 104a of portion, 104b props up the end face (see figure 6) of guide runner 92 respectively, thereby makes ball-

recirculation hole

102 and 74 interconnection of second bal guide of

ball circulating member

94a, 94b.

More specifically, as shown in Figure 7, in guide mechanism 16, ball-recirculation hole 102 is connected with the orientation that tilts by the rolling counter-rotating 104a of portion, 104b with first,

second bal guide

62,74.

Therefore, continuous ringwise ball-recirculation passage 110 is formed by ball-recirculation hole 102, ball grooves, first bal guide 62 of sliding stand 14 and second bal guide of guide runner 92 of ball circulating member 94a, 94b.A plurality of balls 60 roll along ball-recirculation passage 110, thereby sliding stand 14 can carry out back and forth level and smooth moving along guide mechanism 16.

Lid 96 is installed to be on two end surfaces that cover guide runner 92.The hole 111 of Guan Tonging is formed on and covers 96 central authorities vertically, and is provided with second lug boss 112, these lug boss 112 wound holes 111 respectively along upper and lower to outer lug, its cross section is arc.Being set to when guide mechanism 16 is installed in cylinder body 12 tops of second lug boss 112, this second lug boss 112 can embed in the depression 20 of cylinder body 12.

On the other hand, lid 96 inside is formed with space 114, and the rolling counter-rotating 104a of portion, 104b promptly are contained in wherein, and the maintenance groove 116 that is used for remaining on the ball 60 that the rolling counter-rotating 104a of portion, 104b roll also is formed in the space 114.The radial outside that keeps groove 116 to form at the rolling counter-rotating 104a of portion, 104b has arc cross section, makes ball 60 to roll between the ball grooves that keeps groove 116 and the rolling counter-rotating 104a of portion, 104b.

Cover plate 98 forms porose 118 in its substantial middle, the hole of this hole 118 and lid 96 111 is coaxial and have an identical diameter.In addition, outside the end face of guide runner 92 was exposed to by hole 111,118, it was protruding upward at upper and lower to have the 3rd lug boss 120, the three lug bosses 120 on the cover plate 98, and it is arc that the cross section is, corresponding with lid 96.The 3rd lug boss 120 forms the cross section, and roughly second lug boss 112 with lid 96 is identical, also is configured to embed the depression 20 of cylinder body 12.In addition, above-mentioned lid 96 and cover plate 98 tegmentum fixed bolts 122 are separately fixed on the end face of guide runner 92.

In addition, when sliding stand 14 moved back and forth, the dogbolt 82 of stop mechanism 18 propped up the end face of guide runner 92 through via hole 118,111.

The aforesaid structure of linear actuating device 10 basic employings according to first embodiment of the invention.Next the operation and the effect of linear actuating device 10 will be described.The end plate 54 of sliding stand 14 will be described to initial position against the state of cylinder body 12 end faces among Fig. 4.

At first, the pressure fluid from not shown pressure fluid supply source is injected in first mouthful 26.In the case, second mouthful 28 is in the state that is communicated with atmosphere under the operation of unshowned switching valve in the drawings.

The pressure fluid that is conducted to first mouthful 26 is conducted to a through hole 30a, also is conducted to another one through hole 30b by connecting passage 50 simultaneously, thereby makes piston 37 (along the arrow A direction) be pressed towards rod bearing 46.As a result, sliding stand 14 is shifted along the direction away from cylinder body 12 with the piston rod 38 that links to each other with piston 37.

At this moment, be accompanied by the displacement of sliding stand 14, the ball 16 of guide mechanism 16 rolls along ball-recirculation passage 110, guides vertically thereby make sliding stand 14 be directed to mechanism 16.

Then, as shown in figure 10, the end of dogbolt 82 that is arranged at sliding stand 14 1 ends stops the displacement of sliding stand 14 against the end face of the guide runner 92 of guide mechanism 16, and sliding stand 14 takes this to arrive at the final position of displacement.

After unscrewing locking nut 84 and making that dogbolt 82 can move, stop mechanism 18 can be regulated by the screw thread rotation of dogbolt 82 from the overhang of the end face of seat part 64, thereby the displacement amount of sliding stand 14 also can be conditioned.

On the other hand, sliding stand 14 along with above-mentioned side in the opposite direction (promptly along direction) away from the final position of displacement shown in Figure 10 the displacement situation under, be conducted to first mouthful 26 pressure fluid is conducted to second mouthful 28, the first mouthfuls 26 and then is in the state that is communicated with atmosphere before.The result, by the pressure fluid that infeeds in a pair of through hole 30a, the 30b from second mouthful 28, piston 37 is along direction (direction of the arrow B) displacement away from rod bearing 46, so sliding stand 14 is leveling off to the direction superior displacement of cylinder body 12 by piston 37 with piston rod 38.Then, be arranged on vibration damper 78 on the end plate 54 of sliding stand 14 against the end face of cylinder body 12, so linear actuating device 10 is returned to initial position.

According to first embodiment, in this manner, linear actuators 10 has by pair of pistons 37 and is arranged on the cylinder member 40 that the piston rod 38 in the cylinder body 12 constitutes, stop stop mechanism 18 that sliding stand 14 moves and be arranged on the central authorities of an end of sliding stand 14 substantially, sliding stand 14 is arranged on the top of cylinder body 12.Because stop mechanism 18 is arranged on the central authorities of an end on width direction of sliding stand 14 substantially, so when sliding stand 14 move and the dogbolt 82 of stop mechanism 18 against and when engaging with the end surfaces of guide runner 92, can suppress to produce the lateral movement when look in the top of linear actuating device 10.Therefore, can avoid the inclination of contingent sliding stand 14 when sliding stand 14 engages with guide runner 92, and moving of sliding stand 14 can be stopped reliably and stably also.

In addition,

ball circulating member

94a, 94b with ball-recirculation hole 102 are arranged in the guide runner 92 of guide mechanism 16, and guide runner 92 is by two connecting

bolt

22a, and 22b is fixed to the top of cylinder body 12.Therefore, and along comparing, because the length of ball-recirculation passage 110 can shorten, so the longitudinal length of linear actuating device 10 also can be shorter as being arranged on the situation that the track on the main body moves in the conventional linear actuator.In other words, the size of linear actuating device 10 on its length direction can be done forr a short time.

Open traditional non-circulating type linear actuating device that flat No.2008-057679 discloses by Japanese patent publication, the ball (steel ball) that is arranged in the linear actuating device left and right sides is offset easily, and is accompanied by the inclination (crooked) of sliding stand.About this problem, in linear actuating device 10 according to the present invention, comprise that wherein ball 60 can circuit guide mechanism 16,, can obtain the repressed good effect of inclination (crooked) of sliding stand 14 because the ball of the left and right sides 60 can not be offset.

And arcuate depression 20 is formed on the upper surface of cylinder body 12, and second lug boss 112 that outwards protrudes towards cylinder body 12 is arranged on the lid 96 of guide mechanism 16, and guide mechanism 16 is arranged on the top of cylinder body 12.Second lug boss 112 inserts in the depression 20, and further corresponding with lid 96, and the dogbolt 82 of stop mechanism 18 is against lid 96, the position of dogbolt 82 can arrange more close cylinder body 12.

Therefore, compare with the situation that depression 20 is set on the cylinder body 12, the more close cylinder body 12 that guide mechanism 16 and stop mechanism 18 can be placed, thus the height dimension that comprises the linear actuating device 10 of guide mechanism 16 is suppressed.

Further, on the short transverse (as the direction of the arrow D among Fig. 7) of linear actuating device 10, distance L (see figure 7) between the center of the dogbolt 82 of the center of cylinder body 12 and stop mechanism 18 can be littler, therefore, when sliding stand 14 engages against guide mechanism 16 and with guide mechanism 16 by stop mechanism 18, the mobile minimizing that on the Vertical direction of linear actuating device 10, produces.As a result, the inclination that takes place when sliding stand 14 is engaged is suppressed, and sliding stand 14 can be by reliable and stable stopping.

In addition, be arranged on by first bal guide 62 that ball 60 is rolled therein on the inboard of a pair of

guide wall

58a, 58b of sliding stand 14, there is no need guide mechanism 16 fixingly with respect to sliding stand 14, therefore, the thickness of sliding stand 14 is able to attenuation.As a result, the height dimension that comprises the linear actuating device 10 of sliding stand 14 is suppressed, and makes the size of linear stopping device 10 on short transverse become littler.

Further, because a kind of like this structure is provided, in this structure, the seat part 64 of stop mechanism 18 is by an end of the bolt 66a that inserts from the top base portion 56 14 from the upper fixed to the sliding stand, compare with the situation of the base portion 56 that is fixed to sliding stand 14 from the place ahead, the thickness of Gu Ding base portion 56 is thinner like this.As a result, the wall that comprises the sliding stand 14 of base portion 56 can be done thinlyyer, thus sliding stand 14 can do light weight.

Again further, because vibration damper 78 is arranged in the roughly neutral position of the width direction (direction of arrow C) of end plate 54, when sliding stand 14 be shifted and by vibration damper 78 when the end surfaces of cylinder body 12 is stopped, that can suppress when linear actuating device 10 tops are seen that direction (left and right directions) transversely produces moves.As a result, the inclination (crooked) of sliding stand 14 in the time of can suppressing sliding stand 14 and be stopped, and sliding stand 14 can be stabilized and stop reliably.

And, by in the neutral position of the width direction (direction of arrow C) of the lower surface of cylinder body 12 along the first positioning hole 29a is set on axis, 29b, and on axis, be provided for locating the second positioning hole 75a of workpiece (not shown) in the neutral position of the width direction of sliding

stand

14,75b, for example, when insert the logical first positioning hole 29a by pin, 29b and insert other equipment and when being fixed to the cylinder body 12 of linear actuating device 10 on other equipment or the analog (not shown), its relative positioning can easily and reliably be finished, meanwhile, when workpiece was installed on the sliding stand 14, its location can easily be had accurately carried out.

More specifically, in linear actuating device 10, constitute the dogbolt 82 of stop mechanism 18, be arranged in the vibration damper 78 on the end plate 54, be formed on the first positioning hole 29a in the lower surface of

cylinder body

12,29b, and be formed on the neutral position that in second positioning hole in the sliding stand 14 each is positioned and is arranged in the width direction (direction of arrow C) of linear actuating device 10; And, in linear actuating device 10, cylinder body 12, sliding stand 14, guide pad 92 and actuating mechanism 18 form has the lateral symmetry shape.As a result, can not improve the difference on the left and right directions of the linear actuating device 10 that comprises cylinder body 12 and sliding stand 14, its design is simplified.

Further, when sliding stand 14 is manufactured, by using the second positioning hole 75a, the pressure curved guide wall 58a that 75b forms as reference, 58b, and by using the

second positioning hole

75a, 75b (for example makes as reference, cutting) the first ball guiding groove, 62, the

second positioning hole

75a, 75b can by pinpoint accuracy be arranged in the neutral position of the width direction of sliding stand 14.

Next, Figure 11 to 16 has shown linear actuating device 150 according to a second embodiment of the present invention.In this second embodiment, and use identical reference number to indicate, and the detailed description of these same characteristic features is omitted according to the identical structural element of first embodiment's linear actuating device 10.

Be according to the linear actuating device 150 of present embodiment and difference according to first embodiment's linear actuating device 10, shown in Figure 11 to 16, on first and

second mouthful

26,28 side surface that is formed on cylinder body 152 simultaneously, be used to supply the opposite side surface that is formed on cylinder body 152 with third and fourth mouthful of (fluid import/export) 154,156 (referring to Figure 14) of head pressure fluid, and

sensor attachment groove

158a, 158b (referring to Figure 15) are respectively formed on the side surface and opposite side surface of cylinder body 152.

Further, linear actuating device 150 is also that with difference according to first embodiment's linear actuating device 10 stop mechanism 164 is set to have a pair of dogbolt 160a, 160b and locking

nut

162a, 162b.

On the opposite side surface of cylinder body 152, the 3rd mouthful of 154 position that is formed on the straight line with first mouthful 26, and four-hole 156 is formed on the position on the straight line with second mouthful 28.And, be communicated with another through hole 30b in the cylinder body 152 respectively, thereby be fed to third and fourth mouthful 154 for third and fourth mouthful 154,156,156 pressure fluid is imported into after another through hole 30b, and pressure fluid passes through connecting

passage

50a, 50b and is imported among the through hole 30a.

Be used to for first and

second mouthfuls

26,28 and third and fourth mouthfuls 154,156 in this counterpart any optionally is connected to the pipeline (not shown), this mouth is suitable for the installation environment of linear actuating device 150 most.For example, be connected to third and fourth mouthful 154 at pipeline, 156 with situation by its supply and head pressure fluid under, sealing plug 166 is installed in first and

second mouthful

26,28, to seal this first and second mouthful 26,28.On the contrary, be connected to first and second mouthful 26 at pipeline, 28 with situation by its supply and head pressure fluid under, sealing plug 166 is installed in third and fourth mouthful 154,156, to seal this third and fourth mouthful 154,156.

On a side surface and opposite side surface of cylinder body 152,

sensor attachment groove

158a, 158b is formed on first position to four-hole 26,28,154,156 tops, respectively along the length direction (direction of arrow A and B) of cylinder body 152 linearly shape extend.And unshowned sensor is mounted respectively in

sensor attachment groove

158a, 158b, and this sensor can be by detecting the shift position of detecting piston 37 from the magnetive attraction of magnet 36, and magnet 36 is installed in respectively in the pair of pistons 37.

Further, consider stop mechanism 164, be coiled into into the seat part 64 that is fixed to sliding stand 14 with a dogbolt 160a of locking nut 162a threaded joint.Yet another dogbolt 160b is coiled on the width direction (direction of arrow C) that penetrates end plate 54 the roughly bolt hole 168 in neutral position.Locking nut 162b is threaded on the dogbolt 160b, is in the zone that it stretches out the outside of end plate 54.

Bolt hole 168 is upwards spaced a predetermined distance from the vibration damper mounting hole 80 in the end plate 54, and forms coaxially with the tapped hole 88 of seat part 61.More specifically, similar to vibration damper 78, dogbolt 160b is disposed in the neutral position of end plate 54 on width direction (direction of arrow C), and a dogbolt 160a is arranged to along same axis toward each other with another dogbolt 160b.

Next, the operation of aforementioned linear actuating device 150 will be by brief explanation.

At first, from the initial position shown in Figure 13 and 14, piston 37 is pressed by the pressure fluid from the 3rd mouthful of 154 supply and towards rod bearing 46 sides (along the direction of arrow A) displacements, and is accompanied by sliding stand 14 and piston rod 38 together along the direction displacement away from cylinder body 152.In this case, be closed for first and

second mouthful

26,28 and seal by sealing plug 166.

And a dogbolt 160a by forming stop mechanism 164 is against the end surfaces of the guide pad 92 that constitutes guide mechanism 16, and the displacement of sliding stand 14 is stopped, thereby sliding stand 14 arrives its final positions (referring to Figure 16).

On the other hand, at sliding stand 14 when final position shown in Figure 16 is shifted in the opposite direction, by being fed to the 3rd mouthful 154 pressure fluid before the supply, with respect to four-hole 156, piston 37 is pressed and along away from the displacement of the direction (direction of arrow B) of rod bearing 46, and be accompanied by sliding stand 14 with piston 37 by piston rod 38 along direction displacement near cylinder body 152.And by the feasible end surfaces of forming another dogbolt 160b of stop mechanism 164 against the guide pad 92 of forming guide mechanism 16, the displacement of sliding stand 14 is stopped, thereby sliding stand 14 returns its initial position (referring to Figure 13 and 14).

More specifically, has linear actuating device 150 according to second embodiment, be separately positioned on for first and

second mouthfuls

26,28 and third and fourth mouthfuls 154,156 on the side surface and opposite side surface of cylinder body 152, and because the supply of pressure fluid is provided and discharge can selectivity by first and

second mouthful

26,28 and or third and fourth mouthful 154,156 structure, it is suitable for the installation environment of the linear actuating device 150 of supply pressure fluid most, corresponding to the layout of pipeline etc.

Further, similar mode, because

sensor attachment groove

158a, 158b are respectively formed on the side surface and opposite side surface of cylinder body 152, detecting sensor can be by selecting best

sensor attachment groove

158a, 158b corresponding to the installation environment of linear actuating device 150 by attached.And by detecting sensor separately is set with respect to two

sensor attachment groove

158a, 158b, the deviation post of piston 37 can be more accurately detected.

Further, the stop mechanism 164 that stops the displacement of sliding stand 14 is made up of a pair of dogbolt 160a, 160b, thereby a dogbolt 160a is disposed in an end, the roughly neutral position on its width direction (direction of arrow C) of sliding stand 14, yet another dogbolt 160b is arranged on the end plate 154 of the other end that is connected to sliding stand 14, the roughly neutral position on its width direction (direction of arrow C).

Because like this, at initial position and displacement end position, sliding stand 14 is shifted and by

dogbolt

160a, 160b is stopped against guide pad 92 respectively, thereby can suppress the transversely generation of moving of direction (left and right directions) when the top of linear actuating device 150 is seen.More specifically, the linear actuating device 150 that comprises stop mechanism 164 is gone up the formation symmetric shape at the horizontal direction (left and right directions) of linear actuating device 150.

The result, the inclination (crooked) of sliding stand 14 when himself stops can be suppressed, and compare with a distolateral situation that dogbolt 160a is set only, can suppress the generation of moving more reliably, thereby sliding stand 14 can be by more reliable and more stably stop at sliding stand 14.

Sensor attachment groove

158a, 158b are not limited to be set to as mentioned above form one situation respectively on a side of cylinder body 152 and opposite side surface.For example, linear actuating device 200 shown in Figure 17 to 19, the length direction (direction of arrow A and B) that two line

sensor attachment groove

204a, 204b spaced apart a predetermined distance can be set to respectively along cylinder body 202 on the short transverse of cylinder body 202 extends.

In this case, for example, the detecting sensor that is used for detecting the initial position of piston 37 can be set at a sensor attachment groove 204a, and another detecting sensor that is used for detecting the displacement final position of piston 37 can be set at another sensor attachment groove 204b, thereby the initial position of piston 37 and displacement final position can be detected with highi degree of accuracy.

Next, Figure 20 to 21 has shown the linear actuating device 250 according to the 3rd embodiment.In the 3rd embodiment, and use identical reference number to indicate, and the detailed description of these same characteristic features is omitted according to the identical structural element of first and second embodiments' linear actuating device 10,150.

According to the 3rd embodiment's linear actuating device 250 be according to the different place of first and second embodiments' linear actuating device 10,150, substitute on a side surface and the opposite side surface of cylinder body 12 and be provided with first and

second mouthful

26,28, be set at for first and second mouthful 256,258 in the end block 254, this end block 254 is connected to the end of cylinder body 252.

End block 254 is connected to an end of cylinder body 252, thereby closes and seal through hole 30a, 30b.First and second mouthful 256,258 end surfaces that is formed on end block 254, spaced a predetermined distance from width direction, and towards cylinder body 252 sides extensions (direction of arrow A).

Be communicated with one end among the through hole 30a by first communication passage 260 for first mouthful 256.Be connected to second communication passage 262 for second mouthful 258, it extends along width direction (direction of arrow C) in end block 254 inside, and be connected to connecting passage 50a by the third connecting passage 264 that is formed between a pair of through hole 30a, the 30b in the cylinder body 252, this connecting passage 50a is arranged in end plate 54 sides.More specifically,, and between piston 37 and rod bearing 46, be fed to respectively among through hole 30a, the 30b through second and third connecting passage 262,264 and connecting passage 50a from the pressure fluid of second mouthful of 258 supply.Further, third connecting passage 264 is not formed and is communicated with the connecting passage 50b of end block 254 sides (direction of arrow B).

By such mode, be connected to the end of cylinder body 252 on length direction (direction of arrow A and B) by having first and second mouthful 256,258 end block 254, because can on the length direction of cylinder body 252, be established to the connection of pipeline, for example, such setting can be applied to and be used for that wherein pipeline is connected to one of cylinder body 252 and distolaterally distolateral be connected unstable installation environment with another.Linear actuating device according to the present invention is not limited to the foregoing description, can also adopt various replacements and feature and structure and does not deviate from the spirit and scope of the invention that described claim proposes.

Claims

1. a linear actuating device (10,150,200,250), it is characterized in that, in described linear actuating device (10,150,200,250), by (26,28,154,156,256,258) import pressure fluid from the fluid import/export, can make sliding stand (14) along the axially reciprocating of cylinder body (12,152,202,252), described linear actuating device comprises:

Described cylinder body (12,152,202,252), described cylinder body (12,152,202,252) is communicated with described fluid import/export (26,28,154,156,256,258) and has a pair of cylinder chamber (30a, 30b), and pressure fluid is injected in the described a pair of cylinder chamber (30a, 30b);

Described sliding stand (14), described sliding stand (14) is along the axially reciprocating of described cylinder body (12,152,202,252);

Cylinder mechanism (40) with pair of pistons (37), described piston (37) can slide wherein said sliding stand (14) to-and-fro motion under the effect of the shift motion of described piston (37) along described cylinder chamber (30a, 30b);

Guide mechanism (16), described guide mechanism (16) is used for along the described sliding stand of axial lead (14) of described cylinder body (12,152,202,252), described guide mechanism (16) is attached on the described cylinder body (12,152,202,252) and has flat guide pad (92), described guide pad (92) inside is formed with circulation canal (62,74), and a plurality of rolling elements (60) roll in described circulation canal (62,74) and circulate; And

Be used to control the stop mechanism that moves back and forth (18,164) of described sliding stand (14), described stop mechanism (18,164) is arranged on the end of described sliding stand (14), the central authorities on the width direction of described sliding stand (14), the width direction of described sliding stand (14) is axial perpendicular to described sliding stand (14)

Wherein, described stop mechanism (18,164) moves with described sliding stand (14), and against the end of described guide pad (92).

2. linear actuating device as claimed in claim 1 is characterized in that, described guide pad (92) is fixed on the described cylinder body (12,152,202,252).

3. linear actuating device as claimed in claim 2, it is characterized in that, the side surface in the face of described guide mechanism (16) and described sliding stand (14) of described cylinder body (12,152,202,252) is provided with recess (20), described recess (20) caves on the direction away from described sliding stand (14), and the part of described stop mechanism (18,164) is inserted described recess (20).

4. linear actuating device as claimed in claim 3 is characterized in that, is formed with guide groove in the wall portion (58a, 58b) of the side surface that faces described guide pad (92) of described sliding stand (14), and described rolling element (60) is directed in described guide groove.

5. linear actuating device as claimed in claim 1 is characterized in that, wherein, described stop mechanism (18,164) is disposed in described sliding stand (14) on an end of its axial direction and in the other end at least one.

6. linear actuating device as claimed in claim 1, it is characterized in that, wherein, described stop mechanism (18,164) further comprises retaining member (64) and dogbolt (82,160a), described retaining member (64) is arranged in described sliding stand (14) below, described dogbolt (82,160a) and described retaining member (64) threaded joint are so that can be along described axial advancement and retraction, described retaining member (64) is connected on the described sliding stand (14) by fastening piece (66a), and described fastening piece (66a) inserts from the top of described sliding stand (14).

7. linear actuating device as claimed in claim 1, it is characterized in that, wherein, described fluid import/export (26,28,154,156,256,258) is arranged on the opposite flank of described cylinder body (152,202,252), and the described fluid import/export (26,28,154,156,256,258) that is arranged in the described side surface is optionally used.

8. linear actuating device as claimed in claim 1, it is characterized in that, wherein, sensor attachment groove (158a, 158b, 204a, 204b) is respectively formed on the opposite flank on the axial direction of described cylinder body (12,152,202,252), and the detecting sensor that can detect the shift position of described piston (37) is installed in the described sensor attachment groove (158a, 158b, 204a, 204b).

9. linear actuating device as claimed in claim 1, it is characterized in that, wherein, positioning hole (29a, 29b, 75a, 75b) is arranged in the described cylinder body (12,152,202,252), and is positioned at the neutral position of described sliding stand (14) on the width direction perpendicular to described axial direction.

10. linear actuating device as claimed in claim 4, it is characterized in that, described wall portion (58a, 58b) is with respect to the vertical formation of base portion (56), and described base portion (56) is arranged on the top of described cylinder body (12,152,202,252) and is parallel to the upper surface of described cylinder body (12,152,202,252).

11. linear actuating device as claimed in claim 6 is characterized in that, described retaining member (64) heart portion therein has lug boss (86), and described lug boss (86) protrudes and has an arcuate cross-section towards described cylinder body (12,152,202,252).

12. linear actuating device as claimed in claim 11 is characterized in that, described recess (20) caves in and becomes to have and the corresponding arcuate cross-section of described lug boss (86).