CN105829034A

CN105829034A - Chuck

Info

Publication number: CN105829034A
Application number: CN201480069158.2A
Authority: CN
Inventors: 山中修平
Original assignee: THK Co Ltd
Current assignee: THK Co Ltd
Priority date: 2013-12-27
Filing date: 2014-12-16
Publication date: 2016-08-03
Anticipated expiration: 2034-12-16
Also published as: DE112014006021B4; DE112014006021T5; JP5850907B2; KR20160082257A; KR101648697B1; WO2015098614A1; JP2015127074A; TWI577511B; TW201536490A; CN105829034B

Abstract

A drive source (1) of a chuck has a main body portion (11) and a movable portion (3) that is movable linearly with respect to the main body portion (11). An arm (24) is coupled to the movable portion (3) of the drive source (1). A supporting portion (28) is fixed to the main body portion (11) of the drive source (1). A pair of gripping links (26a) and (26b) each have a first portion (41), a second portion (42), and a bent portion (43) which are connected into an L shape. The first portions (41) are provided with a pair of gripping portions (4a) and (4b) for gripping a workpiece. On the supporting portion (28), the bent portions (43) are rotatably supported through rotary shafts (27a) and (27b). The pair of gripping links (26a) and (26b) are disposed so that the bent portions (43) face inward. The second portions (42) of the pair of gripping links (26a) and (26b) are coupled to the arm (24) by a pair of intermediate links (25a) and (25b).

Description

Chuck

Technical field

The present invention relates to a kind of chuck for holding workpiece.

Background technology

As the chuck of holding workpiece, it is known to the chuck being set to utilize a pair handle part clamping workpiece.In typical chuck, a pair handle part is can be supported on clamper main body in the way of opening and closing side's upward sliding.The drive mechanism driving a pair handle part is drive mechanism electric rotating motivation and gear mechanism combined.But, in this typical chuck, exist opening and closing speed compared with slow, be difficult to the such problem of miniaturization.

In order to solve this problem, in patent documentation 1, as driving the drive mechanism of a pair handle part, disclose replacement electric rotating motivation and gear mechanism and employ the chuck of cylinder and linkage.This chuck includes cylinder chamber and the piston linearly moved in cylinder chamber.Cylinder chamber is fixed with at the side upwardly extending guide rail orthogonal with the moving direction of piston.On guide rail, a pair handle part is directed to move up in opening and closing side.It is folded with linkage between piston and a pair handle part.Linkage is configured to: when piston moves to the direction prominent from cylinder chamber, a pair handle part is opened；When the direction that piston enters in cylinder chamber is moved, then a pair handle part Guan Bi.

Citation

Patent documentation

Patent documentation 1: Japanese Unexamined Patent Publication 2011-212754 publication

Summary of the invention

The problem that invention is to be solved

In recent years, due to the reduction of productive temp of operation, it is desirable to the miniaturization of chuck and high speed.In the chuck described in patent documentation 1, owing to using linkage that the linear motion of piston is converted to the on-off action of handle part, therefore have and can make the handle part such advantage of opening and closing at high speed.But, if it is desired to guarantee the opening and closing stroke of handle part, then exist and be difficult to make the such problem of chuck miniaturization.

To this, it is an object of the invention to provide a kind of chuck being capable of miniaturization and high speed.

For solving the scheme of problem

In order to solve above-mentioned problem, the present invention provides a kind of chuck, and this chuck possesses: driving source, this driving source has main part and the movable part that linearly can move relative to described main part；Arm, this arm is linked to described movable part；Support, this support is fixed on described main part；Holding connecting rod for a pair, hold connecting rod for this pair and have the Part I and Part II being connected in letter L shape, the bending section that this pair holds connecting rod is rotatably supported in described support by rotary shaft, and described bending section is configured to towards inner side；A pair handle part, this pair handle part is located at the described Part I of the pair of holding connecting rod, and is used for clamping workpiece；And a pair intermediate connecting rod, the one end of this pair intermediate connecting rod is rotatably linked to described arm, and the other end of this pair intermediate connecting rod is rotatably linked to the described Part II of the pair of holding connecting rod.

Invention effect

According to the present invention, the bending section holding connecting rod of a pair letter L shape is configured to towards inner side, and bending section is rotatably supported in support by rotary shaft, therefore, it is possible to realize the miniaturization of chuck on the basis of ensure that the open angle of a pair handle part.Owing to using linkage the linear motion of movable part to be converted to the on-off action of handle part, therefore, it is possible to make handle part carry out opening and closing at high speed.

Accompanying drawing explanation

Fig. 1 is the axonometric chart of the chuck of an embodiment of the present invention.

Fig. 2 is the axonometric chart (including partial sectional view) of the linear motor of the chuck of present embodiment.

Fig. 3 is the detailed view of the linkage of the chuck of present embodiment.

Fig. 4 is the figure (Fig. 4 (a) illustrates that the chuck of standard-sized sheet, Fig. 4 (b) illustrate the chuck in the stage starting Guan Bi, and Fig. 4 (c) illustrates fully closed chuck) of the on-off action of the chuck illustrating present embodiment.

Fig. 5 is the figure (5 (a), Fig. 5 (c) illustrate the comparative example that holding connecting rod is formed as linearity, and Fig. 5 (b) illustrates the present embodiment that holding connecting rod is formed as letter L shape) comparing the size of linkage in present embodiment and comparative example.

Fig. 6 is the figure (6 (a), Fig. 6 (c) illustrate the comparative example that holding connecting rod is formed as linearity, and Fig. 6 (b) illustrates the present embodiment that holding connecting rod is formed as letter L shape) comparing the size of linkage in present embodiment and comparative example.

Fig. 7 is the figure (7 (a-1), Fig. 7 (a-2) illustrate and will hold the bending section comparative example towards outside of connecting rod, and Fig. 7 (b) illustrates and will hold the bending section present embodiment towards inner side of connecting rod) comparing the size of linkage in present embodiment and comparative example.

Fig. 8 is that (Fig. 8 (a-1) illustrates the front view of comparative example for the figure that compares in present embodiment and the size of the chuck of comparative example middle level poststack, Fig. 8 (a-2) illustrates the side view of comparative example, Fig. 8 (b-1) illustrates that the front view of present embodiment, Fig. 8 (b-2) illustrate the side view of present embodiment).

Fig. 9 is the front view of another example of the chuck of present embodiment.

Detailed description of the invention

Hereinafter, the chuck of one embodiment of the present invention is described in detail based on accompanying drawing.Fig. 1 illustrates the axonometric chart of the chuck of an embodiment of the present invention.The chuck of present embodiment possesses the linear motor 1 as the source of driving and for clamping pawl 4a, 4b of the pair of right and left as handle part of workpiece.The drive shaft 3 as movable part of linear motor 1 is configured in vertical.It is provided with linkage 2 in the bottom of linear motor 1.When the drive shaft 3 making linear motor 1 linearly moves, linkage 2 is utilized to make pawl 4a, 4b carry out opening and closing.Hereinafter, linear motor 1 and the structure of linkage 2 are described successively.

As in figure 2 it is shown, linear motor 1 possesses main part 11 and drive shaft 3.Drive shaft 3 possesses the pipe 12 of hollow and is accommodated in multiple Magnet 13 of hollow space of pipe 12.Magnet 13 is formed as cylindric, and is magnetized in the axial direction.Magnet 13 arranges in the way of identical polar is relative each other.The magnetic pole component 14 being such as made up of it is folded with magnetic materials such as ferrum between Magnet 13.Magnet 13 and magnetic pole component 14 is utilized to be alternatively formed N pole and S pole in drive shaft 3 vertically.

Drive shaft 3 is surrounded by axially aligned multiple coils 15.It is folded with magnetic gap between drive shaft 3 and coil 15.Coil 15 is made up of the three-phase coil including U, V, W phase.Coil 15 is kept by coil holder 16.The upper surface of coil holder 16 is provided with the substrate 17 for connecting up to coil 15.Coil 15, coil holder 16, substrate 17 are covered by the shell 18 of ester moulding.Coil 15, coil holder 16, substrate 17 and shell 18 constitute the main part 11 of linear motor 1.

Both ends in the axial direction of shell 18 are provided with end member 19.End member 19 is provided with the sensor 20 (with reference to Fig. 1) of position for detecting drive shaft 3.End member 19 is also equipped with the sleeve 21 guiding drive shaft 3 to be axially moveable.

When circulation three-phase alternating current in the coil 15 of main part 11, according to the interaction between the magnetic field produced in drive shaft 3 and the electric current flowed in coil 15, drive shaft 3 produces thrust vertically, and drive shaft 3 is axially moveable.The linear motor 1 of present embodiment has little and light feature.By adding linkage 2 to linear motor 1, it is possible to obtain little and light chuck.

The structure of linkage 2 is as described below.As it is shown in figure 1, linkage 2 possesses: arm 24, it is linked to the front end of drive shaft 3 of linear motor 1；A pair intermediate connecting rod 25a, 25b, this pair intermediate connecting rod 25a, 25b are rotatably linked to the both ends of arm 24；Hold connecting rod 26a, 26b for a pair, hold connecting rod 26a, 26b this pair and be rotatably linked to intermediate connecting rod 25a, 25b；And a pair pawl 4a, 4b, this pair pawl 4a, 4b are installed on holding connecting rod 26a, 26b.Hold connecting rod 26a, 26b and be rotatably supported in the cover 28 as support by rotary shaft 27a, 27b.Arm 24, a pair intermediate connecting rod 25a, 25b, hold connecting rod 26a, 26b a pair and a pair pawl 4a, 4b are symmetrical relative to the centrage of drive shaft 3.

As it is shown on figure 3, arm 24 is elongated on the direction orthogonal with drive shaft 3.Both ends on the length direction of arm 24 are linked with intermediate connecting rod 25a, 25b.Central part on the length direction of arm 24 offers the hole 24a that the leading section for drive shaft 3 is inserted.Arm 24 is positioned the combination member such as screw, rivet and is fixed on the leading section of drive shaft 3.

Cover 28 possesses diapire 28c and a pair parallel to each other and orthogonal with diapire 28c covering wall 28a, the 28b of the main part 11 being fixed on linear motor 1.Covering wall 28a, 28b are formed as rectangle.A part for arm 24 and a part of holding connecting rod 26a, 26b are covered by covering wall 28a, 28b.Covering wall 28a, 28b are supported with holding rotary shaft 27a of connecting rod 26a, 26b, the both ends of 27b.Covering wall 28a, 28b offer the through hole inserted for rotary shaft 27a, 27b.In order to prevent rotary shaft 27a, 27b from moving in the axial direction, at the both ends of rotary shaft 27a, 27b, back-up ring 31 is installed.

Hold connecting rod 26a, 26b and there is the Part I 41 and Part II 42 being connected in letter L shape.Part I 41 and Part II 42 are respectively formed as linearity.On the front i.e. Part I 41 holding connecting rod 26a, 26b, pawl 4a, 4b as handle part are installed dismantledly by combination members such as screws.On the base end side i.e. Part II 42 holding connecting rod 26a, 26b of letter L shape, intermediate connecting rod 25a, 25b are rotatably linked.It should be noted that in the present embodiment, the Part I 41 of letter L shape is set as 70 °～110 ° with Part II 42 angulation, but matching design condition can be set smaller than 180 ° arbitrarily angled.Additionally, in this embodiment, pawl 4a, 4b are formed with holding connecting rod 26a, 26b split but it also may pawl 4a, 4b and holding connecting rod 26a, 26b are set to one.

The bending section 43 holding connecting rod 26a, 26b is rotatably supported in cover 28 by rotary shaft 27a, 27b.Hold connecting rod 26a, 26b a pair and be configured to bending section 43 towards inner side.That is, as it is shown on figure 3, when pawl 4a, 4b are positioned at fully open position, hold connecting rod 26a, 26b a pair closest at bending section 43.

The one end of intermediate connecting rod 25a, 25b is rotatably linked to the end of arm 24 by first connecting rod rotary shaft 44, and the other end of intermediate connecting rod 25a, 25b is rotatably linked to hold the Part II 42 of connecting rod 26a, 26b by second connecting rod rotary shaft 45.It is letter U shape that intermediate connecting rod 25a, 25b are formed as section.First connecting rod rotary shaft 44 runs through intermediate connecting rod 25a or intermediate connecting rod 25b and arm 24, and utilizes back-up ring 47 to prevent first connecting rod rotary shaft 44 movement in the axial direction.The part being provided with back-up ring 47 of first connecting rod rotary shaft 44 is referred to as the both ends on the rotary shaft direction of first connecting rod rotary shaft 44.Second connecting rod rotary shaft 45 runs through intermediate connecting rod 25a or intermediate connecting rod 25b and holds connecting rod 26a or hold connecting rod 26b, and utilizes back-up ring 48 to prevent first connecting rod rotary shaft 44 movement in the axial direction.The part being provided with back-up ring 48 of second connecting rod rotary shaft 45 is referred to as the both ends on the rotary shaft direction of second connecting rod rotary shaft 45.

From rotary shaft 27a, 27b end on observation time, the second connecting rod rotary shaft 45 of intermediate connecting rod 25a, 25b be configured at than link first connecting rod rotary shaft 44 and rotary shaft 27a, 27b line L1, L2 position in the outer part (precisely, intermediate connecting rod 25a, 25b from rotary shaft 27a, 27b end on observation time front view such as Fig. 7 (b) shown).This is to when the drive shaft 3 of linear motor 1 declines, hold connecting rod 26a, 26b Guan Bi and utilize pawl 4a, 4b to clamp workpiece.Thus, even if when the power-off of coil 15 of linear motor 1, drive shaft 3 fall under the effect of deadweight, owing to holding connecting rod 26a, 26b Guan Bi, the workpiece that therefore hold by pawl 4a, 4b of holding connecting rod 26a, 26b does not falls out, and will not make workpiece damage yet.

As it is shown on figure 3, the first connecting rod rotary shaft 44 of intermediate connecting rod 25a, 25b and second connecting rod rotary shaft 45 are configured at the outside of cover 28.(with reference to Fig. 4 (a)) or time pawl 4a, 4b are positioned at full close position (with reference to Fig. 4 (c)) when either pawl 4a, 4b is positioned at fully open position, first connecting rod rotary shaft 44 and second connecting rod rotary shaft 45 are all configured at the outside of cover 28, and will not be overlapping with cover 28 in the axial direction.As it is shown on figure 3, the first connecting rod rotary shaft 44 of intermediate connecting rod 25a, 25b and second connecting rod rotary shaft 45 highlight in the axial direction than intermediate connecting rod 25a, 25b.By first connecting rod rotary shaft 44 and second connecting rod rotary shaft 45 being configured at the outside of cover 28, and avoid first connecting rod rotary shaft 44 and second connecting rod rotary shaft 45 overlapping with cover 28 on rotary shaft direction such that it is able to the thickness (thickness on the direction orthogonal with paper of Fig. 3) making cover 28 is thinning.It should be noted that in this embodiment, being not only first connecting rod rotary shaft 44 and second connecting rod rotary shaft 45, intermediate connecting rod 25a, 25b are also configured at the outside of cover 28, but a part of intermediate connecting rod 25a, 25b can be overlapping with cover 28.

Fig. 4 illustrates the on-off action of chuck.Fig. 4 (a) illustrates the chuck of standard-sized sheet, and Fig. 4 (b) illustrates the chuck in the stage starting Guan Bi, and Fig. 4 (c) illustrates fully closed chuck.As shown in Fig. 4 (a), when the drive shaft 3 of linear motor 1 rises to the limit, arm 24 is positioned at the position rising to the limit, and pawl 4a, 4b of holding connecting rod 26a, 26b are positioned at fully open position.

As shown in Fig. 4 (b), when the drive shaft 3 of linear motor 1 declines, arm 24 also declines.Intermediate connecting rod 25a, the 25b at the both ends being linked to arm 24 also decline together with arm 24.Along with the decline of intermediate connecting rod 25a, 25b, hold connecting rod 26a, 26b and rotate to closing direction (1).

As shown in Fig. 4 (c), when the drive shaft 3 making linear motor 1 declines further, arm 24 and intermediate connecting rod 25a, 25b decline further, hold connecting rod 26a, 26b and rotate to closing direction further.Hold connecting rod 26a, 26b to carry out rotating until pawl 4a, 4b contact with each other.

With reference to Fig. 5, the reason being capable of the miniaturization of bar linkage structure 2 by making holding connecting rod 26a, 26b be formed as letter L shape is illustrated.Fig. 5 (a), Fig. 5 (c) illustrate the comparative example that holding connecting rod 26a ', 26b ' are formed as linearity, and Fig. 5 (b) illustrates the present embodiment that holding connecting rod 26a, 26b are formed as letter L shape.In the drawings, for matching design condition, by hold connecting rod 26a, 26b opening, hold connecting rod 26a, 26b reinforcement (from the length alpha of second connecting rod rotary shaft 45 to rotary shaft 27b and from rotary shaft 27b to the ratio of length β of the leading section holding connecting rod 26b) be set to 1.And, it is set to when the drive shaft 3 of linear motor 1 declines, holds connecting rod 26a, 26b Guan Bi.

As shown in the comparative example of Fig. 5 (a), in the case of holding connecting rod 26a ', 26b ' are formed as linearity, if it is desired to the width W of constriction linkage 2, then cause height H elongated.As shown in the comparative example of Fig. 5 (c), if it is desired to shorten the height H of linkage 2, then cause width W to broaden.As shown in Fig. 5 (b), by linkage 26a, 26b being formed as letter L shape, the height H of linkage 2 can either be made to diminish, the width W of linkage 2 also can be made to diminish.

Fig. 6 is to illustrate the example that the reinforcement (from the length alpha of second connecting rod rotary shaft 45 to rotary shaft 27b and the ratio from rotary shaft 27b to length β of the leading section holding connecting rod 26b) holding connecting rod 26a, 26b is set to 1.5.As Fig. 5 (b), Fig. 6 (b) illustrates the present embodiment that holding connecting rod 26a, 26b are formed as letter L shape.As Fig. 5 (a), Fig. 5 (c), Fig. 6 (a), Fig. 6 (c) illustrate the comparative example that holding connecting rod 26a ', 26b ' are formed as linearity.

When the reinforcement holding connecting rod 26a, 26b is set to 1.5, although the distance making holding connecting rod 26a, 26b move is elongated, but can obtain the power of 1.5 times according to lever principle.As shown in Fig. 6 (b), by holding connecting rod 26a, 26b being formed as letter L shape, even if when reinforcement is set as 1.5, it is also possible to reduce height and the width of linkage 2.

With reference to Fig. 7, the reason by making miniaturization that the bending section 43 of a pair holding connecting rod 26a, 26b realizes bar linkage structure 2 towards inner side is illustrated.Fig. 7 (a-1), Fig. 7 (a-2) illustrate by hold connecting rod 26a ', 26b ' bending section 43 ' towards the comparative example in outside, Fig. 7 (b) illustrates the bending section 43 present embodiment towards inner side that will hold connecting rod 26a, 26b.

As shown in the comparative example of Fig. 7 (a-1), be configured in the case of outside holding connecting rod 26a ', the bending section 43 ' of 26b ' by a pair, intermediate connecting rod 25a ', 25b ' second connecting rod rotary shaft 45 ' relative to first connecting rod rotary shaft 44 ' and rotary shaft 27a linking intermediate connecting rod 25a ', 25b ' ', line L1 ', the L2 ' of 27b ' and be easily configurable at inner side.Therefore, when drive shaft 3 declines, cause holding connecting rod 26a ', 26b ' and open.In order to avoid this situation, as shown in Fig. 7 (a-2), when the second connecting rod rotary shaft 45 ' of intermediate connecting rod 25a ', 25b ' is configured at outside relative to line L1 ', L2 ', linkage 2 is caused to maximize in the direction of the width.

As shown in Fig. 7 (b), it is configured to towards inner side by a pair being held the bending section 43 of connecting rod 26a, 26b, it is prone to the second connecting rod rotary shaft 45 of intermediate connecting rod 25a, 25b is configured at the first connecting rod rotary shaft 44 linking intermediate connecting rod 25a, 25b and rotary shaft 27a, the outside of line L1, L2 of 27, it is possible to realize the miniaturization of linkage 2.

It addition, as shown in Fig. 7 (b), by the bending section 43 by holding connecting rod 26a, 26b towards inner side, it is also possible to make the open angle θ of holding connecting rod 26a, 26b increase.When holding connecting rod 26a, the 26b making to open rotates to closing direction, the Part I 41 holding connecting rod 26a, 26b is close to parallel to each other, is thus susceptible to clamp workpiece.

Fig. 8 is the figure of the size comparing the chuck in present embodiment and comparative example.Fig. 8 (a-1), Fig. 8 (a-2) illustrate that the comparative example of the inner side that first connecting rod rotary shaft 44 ' and second connecting rod rotary shaft 45 ' are configured at cover 28 ', Fig. 8 (b-1), Fig. 8 (b-2) illustrate the outside and first connecting rod rotary shaft 44 being set to that first connecting rod rotary shaft 44 and second connecting rod rotary shaft 45 are configured at cover 28 and not overlapping with cover 28 present embodiment of second connecting rod rotary shaft 45.

As Fig. 8 (a-1) comparative example chuck front view shown in, in the case of the inner side that first connecting rod rotary shaft 44 ' and second connecting rod rotary shaft 45 ' are configured at cover 28 ', need the thickness (thickness on the direction orthogonal with paper of Fig. 8 (a-1)) making cover 28 ' thicker than the length in the axial direction of first connecting rod rotary shaft 44 ' and second connecting rod rotary shaft 45 '.As shown in the side view of the chuck after the stacking of Fig. 8 (a-2), it is also desirable to make spacing P1 on the thickness direction (left and right directions of the paper of Fig. 8 (a-2)) between chuck increase.

On the other hand, as Fig. 8 (b-1) present embodiment chuck front view shown in, first connecting rod rotary shaft 44 and second connecting rod rotary shaft 45 are configured at the outside of cover 28, first connecting rod rotary shaft 44 and second connecting rod rotary shaft 45 on rotary shaft direction not overlapping with cover 28 in the case of, it is possible to the thickness (thickness on the direction orthogonal with paper of Fig. 8 (b-1)) of cover 28 is thinned to below the length in the axial direction of first connecting rod rotary shaft 44 and second connecting rod rotary shaft 45.As Fig. 8 (b-2) stacking chuck side view shown in, it is also possible to make spacing P1 on the thickness direction (left and right directions of the paper of Fig. 8 (b-2)) between chuck reduce.

Fig. 9 illustrates another example of linkage.In this embodiment, in order to realize the further miniaturization on the width of linkage, the length of arm 24 is shortened.And, covering wall 28a, 28b of cover 28 are formed breach 28a1,28b1, covering wall 28a, the global shape of 28b are formed as letter I shape.By forming breach 28a1,28b1 in covering wall 28a, 28b of lid 28, it is thus possible to the first connecting rod rotary shaft 44 of intermediate connecting rod 25a, 25b and second connecting rod rotary shaft 45 to be configured at the outside of covering wall 28a, 28b, first connecting rod rotary shaft 44 and second connecting rod rotary shaft 45 can be made not overlapping with covering wall 28a, 28b on rotary shaft direction, therefore, it is possible to the thickness of thinning linkage (thickness on the direction orthogonal with paper in Fig. 9).

It should be noted that the present invention is not limited to be implemented as above-mentioned embodiment, in the range of the purport not changing present invention configuration, other embodiments can be implemented as.

Such as, in the above-described embodiment, as the source of driving, employ the cylindric linear motor surrounding coil around drive shaft, but the structure of linear motor is not limited to above-mentioned embodiment.As the source of driving, additionally it is possible to use the plate shaped linear motor that coil is relative with permanent magnet across gap.

In the above-described embodiment, have employed the structure holding connecting rod Guan Bi when the drive shaft of linear motor declines, but also be able to use the structure that drive link is opened when the drive shaft of linear motor declines.

In the above-described embodiment, as the source of driving, employ linear motor, but as the source of driving, it is also possible to use the working cylinders such as cylinder, hydraulic cylinder, electric cylinder.

In the above-described embodiment, illustrate the example drive shaft of linear motor being configured in vertical, but also be able to the drive shaft of linear motor is configured at the arbitrary directions such as horizontal direction.

In the above-described embodiment, illustrate the example that the both ends of the first connecting rod rotary shaft of a pair intermediate connecting rod and second connecting rod rotary shaft are not overlapping with cover on rotary shaft direction, but as long as a pair intermediate connecting rod relative to the end of the first connecting rod rotary shaft of at least one party of arm at least one party on rotary shaft direction and/or, a pair intermediate connecting rod hold relative to a pair the end of the second connecting rod rotary shaft of at least one party of connecting rod at least one party on rotary shaft direction on rotary shaft direction not overlapping with cover.That is, the both ends of first connecting rod rotary shaft and second connecting rod rotary shaft are altogether eight, as long as one of them is not overlapping with cover on rotary shaft direction.

Japanese Patent Application 2013-273023 that the present invention files an application in Japan based on December in 2013 on the 27th.This content is all incorporated herein.

Description of reference numerals:

1 ... linear motor (driving source)；2 ... linkage；3 ... drive shaft (movable part)；4a, 4b ... pawl (handle part)；11 ... main part；24 ... arm；25a, 25b ... intermediate connecting rod；26a, 26b ... hold connecting rod；27a, 27b ... rotary shaft；28 ... cover；28a, 28b ... covering wall；41 ... hold the Part I of connecting rod；42 ... hold the Part II of connecting rod；43 ... hold the bending section of connecting rod；44 ... first connecting rod rotary shaft；45 ... second connecting rod rotary shaft.

Claims

1. a chuck, wherein,

Described chuck possesses:

Driving source, described driving source has main part and the movable part that linearly can move relative to described main part；

Arm, described arm is linked to described movable part；

Support, described support is fixed on described main part；

Hold connecting rod a pair, the pair of holding connecting rod has the Part I and Part II being connected in letter L shape, the bending section of the pair of holding connecting rod is rotatably supported in described support by rotary shaft, and described bending section is configured to towards inner side；

A pair handle part, the pair of handle part is located at the described Part I of the pair of holding connecting rod, and the pair of handle part is used for clamping workpiece；And

A pair intermediate connecting rod, the one end of the pair of intermediate connecting rod is rotatably linked to described arm, and the other end of the pair of intermediate connecting rod is rotatably linked to the described Part II of the pair of holding connecting rod.

Chuck the most according to claim 1, it is characterised in that

When from the end on observation of described rotary shaft, the pair of intermediate connecting rod is configured at than line as described below position in the outer part relative to the second connecting rod rotary shaft of the pair of holding connecting rod: described line is the line linked with described rotary shaft relative to the first connecting rod rotary shaft of described arm by the pair of intermediate connecting rod

During so that the described movable part in described driving source moves to the direction prominent from described main part, the pair of holding connecting rod closes and makes the pair of handle part clamp workpiece.

Chuck the most according to claim 1 and 2, it is characterised in that

The pair of intermediate connecting rod relative to the first connecting rod rotary shaft of at least one party of described arm at least one party on rotary shaft direction end and/or, the pair of intermediate connecting rod relative to the end of at least one party on rotary shaft direction of the second connecting rod rotary shaft of at least one party of the pair of holding connecting rod, the most not overlapping with described support.

Chuck the most according to claim 3, it is characterised in that

Described support possesses a pair covering wall, and the pair of covering wall supports the both ends of described rotary shaft, and covers at least some of of at least some of of described arm and the pair of holding connecting rod.