Self-centering apparatusTechnical field
The present invention relates to clamping and fixing device, more specifically to a kind of self-centering apparatus.
Background technology
In automated productin line, the clamping position of workpiece is a critically important link.Existing workpiece is automaticCentring means is driven using motor, and production cost is high, when workpiece is clamped, it is necessary to be detected using sensor and provide letterNumber, allow motor stalls, be not so easily damaged motor.And existing workpiece self-centering apparatus may be only available for a certain kindWorkpiece, application is narrow, poor universality, when needing to change product, must change corresponding fixture and movable sensorIt position, need to so expend considerable time and effort, be helpless to the raising of production efficiency.
The content of the invention
The technical problem to be solved in the present invention is, for the drawbacks described above of prior art, there is provided a kind of rational in infrastructure, suitableWith scope is wide, production cost is low, strong applicability, safe and reliable self-centering apparatus.
The technical solution adopted for the present invention to solve the technical problems is to propose a kind of self-centering apparatus, including：
Base；
The first slide block assembly for being installed on the first straight line guide assembly of one end on base and being slidably matched with it；
The the second sliding block group for being installed on the second straight line guide assembly of the other end relative on base and being slidably matched with itPart, the second straight line guide assembly provide same or parallel to each other straight-line guidance with the first straight line guide assembly；
Connect the linkage of the first slide block assembly and the second slide block assembly；With
Drive cylinder, the drive cylinder drive the first slide block assembly to do linear reciprocation fortune along first straight line guide assemblyIt is dynamic, and then drive the second slide block assembly to be done and the first slide block assembly opposite direction along second straight line guide assembly by linkageOn straight reciprocating motion, realize the relative opening of the first slide block assembly and the second slide block assembly and tighten up.
According to one embodiment of present invention, the linkage includes first connecting rod, second connecting rod and third connecting rod,Wherein：
First connecting rod is rotatablely arranged on base on base plane；
The first end of second connecting rod and the first end of first connecting rod are rotatably coupled, the second end and first of second connecting rodSlide block assembly is rotatably coupled；
The first end of third connecting rod and the second end of first connecting rod are rotatably coupled, the second end and second of third connecting rodSlide block assembly rotatably connects.
According to one embodiment of present invention, the base is provided with support shaft and the axle of usheing to seat being installed in support shaftHold, the first connecting rod is fixedly installed on the rolling bearing units.
According to one embodiment of present invention, the first end of the second connecting rod be threaded with the first oscillating bearing withThe first connecting shaft set in the first end of first connecting rod coordinates realization to be rotatably coupled, the second end spiral shell of the second connecting rodLine is connected with second joint bearing and coordinates realization to be rotatably coupled with the second connecting shaft set on the first slide block assembly；
The first end of the third connecting rod is threaded with what is set on the second end of three-knuckle bearing and first connecting rod3rd connecting shaft coordinates realization to be rotatably coupled, and the second end of the third connecting rod is threaded with the 4th oscillating bearing and theThe 4th connecting shaft set on two slide block assemblies, which coordinates, realizes rotatable connection.
According to one embodiment of present invention, first oscillating bearing and second joint bearing use the side of positive and negative toothFormula first end corresponding with second connecting rod and the connection of the second end；The three-knuckle bearing and the 4th oscillating bearing use positive and negative toothMode first end corresponding with third connecting rod and the second end connection.
According to one embodiment of present invention, the first straight line guide assembly and second straight line guide assembly includeTwo line slideways spaced apart and parallel to each other；First slide block assembly and the second slide block assembly include and thisTwo line slideway two sliding blocks coordinated and the sliding block installing plate being fixed on described two sliding blocks.
According to one embodiment of present invention, on the sliding block installing plate of first slide block assembly and the second slide block assemblyIt is provided with the guidance set for clamping workpiece.
According to one embodiment of present invention, the guidance set includes being fixedly installed on sliding block installing plate at leastTwo leads.
According to one embodiment of present invention, the output end of the drive cylinder passes through floating junction and the first sliding block groupThe 5th connection axis connection set on part.
Implement the self-centering apparatus of the present invention, have the advantages that：The self-centering apparatus of the present invention passes through gasCylinder drives two slide block assembly synchronous backward straight reciprocating motions in the presence of linkage so that two slide block assemblies are relativeOpen and tighten up, so as to realize the Centering Clamping of workpiece or release, thus it is simple and reasonable, securely and reliably；Two sliding block groupsThe stroke of the straight reciprocating motion of part by cylinder Stroke Control, can easily be applied to various workpiece clamping position,It is applied widely.
Brief description of the drawings
Below in conjunction with drawings and Examples, the invention will be further described, in accompanying drawing：
Fig. 1 is the structural representation of the self-centering apparatus of one embodiment of the invention.
Embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, it is right below in conjunction with drawings and ExamplesThe present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, andIt is not used in the restriction present invention.
Fig. 1 shows the structural representation of self-centering apparatus according to an embodiment of the invention.As shown in figure 1, shouldSelf-centering apparatus is mainly by base 10, first straight line guide assembly 20, the first slide block assembly 30, second straight line guide assembly40th, the second slide block assembly 50, linkage 60 and drive cylinder 70 are formed.First straight line guide assembly 20 is arranged on base 10On one end, the first slide block assembly 30 is slidably matched with first straight line guide assembly 20.Second straight line guide assembly 40 is arranged on bottomOn the relative other end of seat 10, the second slide block assembly 50 is slidably matched with second straight line guide assembly 40.Linkage 60 is usedIn the first slide block assembly 30 of connection and the second slide block assembly 50.The output end of drive cylinder 70 is connected with the first slide block assembly 30.When drive cylinder 70 works, the first slide block assembly 30 is driven to be straight reciprocating motion, Jin Ertong along first straight line guide assembly 20Crossing linkage 60 drives the second slide block assembly 50 to be done and the opposite direction of the first slide block assembly 30 along second straight line guide assembly 40On straight reciprocating motion, realize the relative opening of the first slide block assembly 30 and the second slide block assembly 50 and tighten up.
Specifically as shown in figure 1, first straight line guide assembly 20 and second straight line guide assembly 40 are divided into the two of base 10End, is respectively provided with two line slideways that are spaced apart and being set parallel to each other, so as to be the first slide block assembly 30 and secondSlide block assembly 40 provides the guiding in same rectilinear direction.In different embodiment according to the subject invention, first straight line guide assembly20 and second straight line guide assembly 40 also can be that the first slide block assembly 30 and the second slide block assembly 40 provide parallel to each other twoGuiding in rectilinear direction, it can also realize the self-centering apparatus of the present invention.First slide block assembly 30 and the second slide block assembly 40Two can be passed through from being formed with two sliding blocks with two line slideways and the sliding block installing plate being fixed on two sliding blocksReverse reciprocating motion between individual sliding block installing plate, which is realized, opens and tightens up relatively.The output end of drive cylinder 70 can pass through floatingJoint 71 is connected with the connecting shaft 32 set on the sliding block installing plate of the first slide block assembly 30, so as to when drive cylinder 70 worksThe synchronous linear of the first slide block assembly 30 can be driven to move.Floating junction 70 is also prevented from the output end of drive cylinder by radiallyPower is acted on and deformed.
Further as shown in figure 1, linkage 60 is made up of first connecting rod 63, second connecting rod 65 and third connecting rod 64.TheOne connecting rod 63 is fixedly mounted on rolling bearing units 62, and rolling bearing units 62 are rotatably installed on the support being fixedly installed on base 10On axle 61, so that first connecting rod 63 can rotate in the plane of base 10 around support shaft 61.The first end of second connecting rod 65Oscillating bearing 651 is threaded with, is coordinated by the connecting shaft set in the first end of the oscillating bearing 651 and first connecting rod 63Realize the first end of second connecting rod 65 and being rotatably coupled for the first end of first connecting rod 63.Second end spiral shell of second connecting rod 65Line is connected with oscillating bearing 652, the connection set on the sliding block installing plate by the slide block assembly 30 of oscillating bearing 652 and firstThe cooperation of axle 31 realization is rotatably coupled with the first slide block assembly 30.The first end of third connecting rod 64 is threaded with joint shaft641 are held, is coordinated by the connecting shaft set on the second end of the oscillating bearing 641 and first connecting rod 63 and realizes third connecting rod 64First end is rotatably coupled with the second end of first connecting rod 63.Second end of third connecting rod 64 is threaded with oscillating bearing642, the connecting shaft 51 set on the sliding block installing plate by the slide block assembly 50 of oscillating bearing 642 and second, which coordinates, to be realized and theThe rotatable connection of two slide block assemblies 50.Thus design, when the first slide block assembly of Work Promote 30 of drive cylinder 70 is to base10 outer end movement when, the first slide block assembly 30 so by second connecting rod 65 drive first connecting rod 63 it is counterclockwise around support shaft 61Rotation, so as to promote the second slide block assembly 50 also to be moved to the outer end of the opposite side of base 10 by third connecting rod 64, realize theThe relative opening of one slide block assembly 30 and the second slide block assembly 50；The first slide block assembly 30 is pulled the bottom of to when drive cylinder 70 worksWhen mobile among seat 10, the first slide block assembly 30 and then first connecting rod 63 is driven around the up time of support shaft 61 by second connecting rod 65Pin rotates, so as to pull the second slide block assembly 50 also to movement among base 10, to realize the first sliding block by third connecting rod 64The relative of the slide block assembly 50 of component 30 and second is tightened up.
In preferred embodiment, two oscillating bearings 651 and 652 at the both ends of second connecting rod 65 can use the side of positive and negative toothFormula is connected with the both ends of second connecting rod 65.Similarly, two oscillating bearings 641 and 642 at the both ends of third connecting rod 64 can alsoBoth ends with third connecting rod 64 by the way of positive and negative tooth are connected.So design, can very easily adjust the He of second connecting rod 65The physical length of third connecting rod 64, it is easy to the clamping spacing to self-centering apparatus to be adjusted, with suitable for a variety ofWorkpiece.
In further preferred embodiment, on the sliding block installing plate of the first slide block assembly 30 and the second slide block assembly 50It is provided with the guidance set for clamping workpiece.In specific embodiment as shown in Figure 1, the guidance set is to be fixedly installed in cunningTwo leads 80 on block installing plate.In different embodiment according to the subject invention, guidance set can also be according to required clampingWorkpiece difference and do various adaptability designs.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present inventionAll any modification, equivalent and improvement made within refreshing and principle etc., should be included in the scope of the protection.