CN104493705A - Improved floating clamping head - Google Patents

Abstract

The invention provides an improved floating clamping head and belongs to the technical field of machinery. The improved floating clamping head comprises a shell, a fixing tip and a clamping mechanism, the clamping mechanism comprises a fixing seat and a driving disc, a main clamping member and a plurality of auxiliary clamping members are arranged in front of the fixing seat, each auxiliary clamping member is fixedly arranged on the fixing seat, the head end of the main clamping member is connected on the fixing seat in a hinged manner while the tail end of the same is connected with the driving disc, the fixing seat is movably connected with the shell through a plurality of floating adjusting members, the driving disc can drive the main clamping member to swing circumferentially to enable the head end of the main clamping member to rotate around the hinged point, the fixing seat is driven by the main clamping member to be in circumferential displacement within a preset circumferential floating range and drives the auxiliary clamping members to gather together towards or be away from a workpiece, the fixing tip and the fixing seat are coaxially arranged, and the fixing tip penetrates the shell and partly extends into the middle of the fixing seat. The improved floating clamp has the advantages of being good in clamping effect and having a floating adjusting function.

Description

Floating clamp after a kind of improvement

Technical field

The invention belongs to field of mechanical technique, relate to a kind of chuck, the floating clamp particularly after a kind of improvement being applicable to grinding machine.

Background technology

Grinding machine utilizes grinding tool to carry out the lathe of grinding to surface of the work.Most grinding machine uses the emery wheel of High Rotation Speed to carry out grinding, minority be use other grinding tools such as oilstone, abrasive band and free abrasive to process.

Carry out mill to shaft-like workpiece and add man-hour, lathe utilizes Double Tops pinnacle live axle to be processed, install chuck in one end of axle, chuck and axle to be processed are fixed, and lathe drives emery wheel to carry out mill processing near axle.In prior art, the chuck structure that great majority are applicable to grinding machine is simple, and clamping effect is general and easily loosen in process, affects the operating efficiency of actual grinding machine.

In sum, for solving the deficiency on existing chuck structure, need the floating clamp after designing the good improvement of a kind of clamping effect.

Summary of the invention

The object of the invention is to there are the problems referred to above for existing technology, propose the good and floating clamp after there is the improvement of floating regulatory function of a kind of clamping effect.

Object of the present invention realizes by following technical proposal: the floating clamp after a kind of improvement, comprises shell, stationary center and the clamping device for holding workpiece, wherein:

Described clamping device comprises the holder of setting in the enclosure and in hollow structure and is movably arranged on the driving disc spacing pressing at shell rear, the key grip and some sub-folder gripping members that arrange around holder axial line is provided with in holder front, each sub-folder gripping member is installed on holder respectively, the head end of described key grip is articulated and connected on holder, the end of key grip is connected with driving disc spacing pressing, described holder is flexibly connected with shell by some floating regulating parts, described driving disc spacing pressing can drive key grip circuit oscillation, key grip head end is rotated around pin joint, described holder produces circumferential displacement in predetermined circumferential domain of walker under key grip drives, holder each sub-folder gripping member related to be gathered or away from workpiece to workpiece,

Described stationary center and holder are coaxially arranged, and described stationary center also partly stretches in the middle part of holder through shell.

As a further improvement on the present invention, described stationary center is located in the middle part of shell by top mount pad, be also provided with rear seal-cover at shell rear and stationary center through rear seal-cover, described rear seal-cover is tightly connected by sealing ring and holder, driving disc spacing pressing.

As a further improvement on the present invention, described key grip is thin slice claw, and the quantity of described sub-folder gripping member is two, and described sub-folder gripping member is the adjusting bolt be fixed on holder.

As a further improvement on the present invention, the end of described key grip offers pawl strip through hole, described driving disc spacing pressing is connected with key grip by pusher dog pin, and described pusher dog pin one end is also inserted solid on driving disc spacing pressing through shell, the other end stretches in pawl strip through hole.

As a further improvement on the present invention, the lateral surface of described key grip head end is surrounded with some arcwall faces.

As a further improvement on the present invention, be provided with one in the enclosure and insert solid slide block above holder, the head end of described key grip is articulated and connected on slide block.

As a further improvement on the present invention, on holder symmetry offer be obliquely installed and with two sub-folder gripping members, two oblique through holes one to one, each sub-folder gripping member is all located in corresponding oblique through hole, holder also offers oblique through hole two communication passage one to one with two, each oblique through hole is all by corresponding communication passage and extraneous UNICOM, each sub-folder gripping member is all fixed on holder by the first set bolt, corresponding sub-folder gripping member to be fixed in corresponding tiltedly through hole through corresponding holder and corresponding communication passage by each first set bolt all successively.

As a further improvement on the present invention, shell offers and coaxially to arrange with two sub-folder gripping members and circularly one to one to regulate through hole.

As a further improvement on the present invention, in the middle part of holder, symmetry offers two via holes, annular end cap is provided with in shell upper cover, annular end cap offers and two via holes, two ending cover holes one to one, positioning seat is inserted with in the middle part of annular end cap, described positioning seat is made up of the annular base body be connected as a single entity and two locating dowels, annular base body lateral surface is evenly distributed with some anti-skidding projections, described two locating dowels be symmetrical arranged and with two via hole one_to_one corresponding, each locating dowel is through corresponding end cap bore and insert solid in corresponding via hole.

As another improvement of the present invention, each floating regulating part is separately positioned between holder lateral surface and shell medial surface, and described floating regulating part comprising the internal fixtion head be installed on holder lateral surface, being installed in the extenal fixation head on shell medial surface and the floating spring for connecting internal fixtion head and extenal fixation head.

As a further improvement on the present invention, described internal fixtion head offers internal fixtion hole, described extenal fixation head offers the extenal fixation hole that arrange corresponding to internal fixtion hole, the two ends of described floating spring are respectively equipped with and arrange in closed loop and internal buckle ring, the outer buckle ring corresponding with internal fixtion hole, extenal fixation hole, described internal buckle ring passes corresponding internal fixtion hole and is connected with internal fixtion head, and described outer buckle ring passes corresponding extenal fixation hole and is connected with extenal fixation head.

As a further improvement on the present invention, ring inner sleeve is installed with in the middle part of shell, described stationary center also partly stretches in the middle part of holder through top mount pad, rear seal-cover, inner sleeve successively, it is outer and is flexibly connected with inner sleeve that described holder is located at inner sleeve, surrounds and form floating cavity volume between the madial wall of described holder and the lateral wall of inner sleeve.

As a further improvement on the present invention, the lateral surface of inner sleeve circumferentially offers some inner sleeves and regulates through hole, holder is inserted and intrinsicly regulates through hole some spacer pins one to one with inner sleeve, each spacer pin one end is all installed on holder, and the other end all stretches into corresponding inner sleeve and regulates through hole interior and can produce circumferential displacement in this inner sleeve adjustment through hole.

As a further improvement on the present invention, the bilateral symmetry of described slide block is provided with two slide rails, holder offers and two slide rails chute one to one, each slide rail to be all movably arranged in corresponding chute and can straight line slippage in corresponding chute, slider row bar shape through hole is offered in the middle part of described slide block, in slider row bar shape through hole, be provided with the second set bolt, described second set bolt passes slider row bar shape through hole and is fixed on holder by slide block.

As a further improvement on the present invention, the junction of each slide rail and slide block all offers strip groove.

As a further improvement on the present invention, fixed cap is fixed with and the two fastening formation slide block cavity volume above holder, described slide block is positioned at slide block cavity volume, described fixed cap is connected by the 3rd set bolt and slide block, fixed cap is also inserted with and is connected and the slide block regulating part of energy adjusting slider vertical direction position with slide block, shell offers the length that arranges corresponding to slide block regulating part and regulates through hole.

Based on technique scheme, the embodiment of the present invention at least can produce following technique effect: the mode adopting thin slice claw and two adjusting bolts together clamping work pieces, the clamp force distribution that the good and workpiece of clamping effect is subject to is even, improves machining accuracy and production efficiency; Clamping device and floating regulating part cooperatively interact, and when workpiece is entered, eccentricity issues is also little a little, ensure that the normal operation of grinding tool and grinding machine well, for grinding machine processing improves reliability and operating efficiency, reduce defect rate.

Accompanying drawing explanation

Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in further detail, wherein:

Fig. 1 is structural representation when not installing stationary center in a preferred embodiment of the present invention.

Fig. 2 is the structural representation at another visual angle of Fig. 1.

Fig. 3 is the structural representation after installing stationary center in a preferred embodiment of the present invention.

Fig. 4 is the structural representation at another visual angle of Fig. 2.

Fig. 5 be in Fig. 3 A-A to sectional view.

Fig. 6 is the explosive view of a preferred embodiment of the present invention.

Fig. 7 is the structural representation after a preferred embodiment of the present invention installs annular end cap and positioning seat.

Fig. 8 is the structural representation of positioning seat in a preferred embodiment of the present invention.

Fig. 9 is the explosive view of Fig. 7 mono-preferred embodiment.

Figure 10 is the mounting structure schematic diagram of holder and inner sleeve in a preferred embodiment of the present invention.

Figure 11 is the structural representation of holder in a preferred embodiment of the present invention.

Figure 12 is the structural representation of pusher dog pin in a preferred embodiment of the present invention.

Figure 13 is the structural representation at another visual angle of Figure 11.

Figure 14 is the structural representation at another visual angle of Figure 13.

Figure 15 is the structural representation of a preferred embodiment of the present invention housing.

Figure 16 is the structural representation of key grip in a preferred embodiment of the present invention.

Figure 17 is the structural representation of inner sleeve in a preferred embodiment of the present invention.

Figure 18 is the structural representation at another visual angle of Figure 17.

Figure 19 is the structural representation of fixed cap in a preferred embodiment of the present invention.

Figure 20 is the structural representation of slide block in a preferred embodiment of the present invention.

In figure, 10, shell; 11, circular adjustment through hole; 12, long adjustment through hole; 21, float regulating part; 211, internal fixtion head; 2111, internal fixtion hole; 212, extenal fixation head; 2121, extenal fixation hole; 22, inner sleeve; 221, inner sleeve regulates through hole; 23, float cavity volume; 24, spacer pin; 25, the second set bolt; 26, fixed cap; 27, slide block cavity volume; 28, the 3rd set bolt; 29, slide block regulating part; 30, clamping device; 31, holder; 311, oblique through hole; 312, communication passage; 313, via hole; 314, chute; 32, driving disc spacing pressing; 33, key grip; 331, pawl strip through hole; 332, arcwall face; 34, sub-folder gripping member; 35, pusher dog pin; 351, intercalation fixing part; 352, connecting portion; 36, slide block; 361, slide rail; 362, slider row bar shape through hole; 363, strip groove; 37, the first set bolt; 40, annular end cap; 41, ending cover hole; 50, positioning seat; 51, annular base body; 52, locating dowel; 53, anti-skidding projection; 60, stationary center; 71, top mount pad; 72, rear seal-cover; 73, sealing ring; 74, capping bolt.

Detailed description of the invention

Be below specific embodiments of the invention and by reference to the accompanying drawings, technical scheme of the present invention is further described, but the present invention be not limited to these embodiments.

The present invention protects the floating clamp after a kind of improvement, and can be used for the axle class workpiece to be processed clamping grinding machine, be convenient to grinding machine and utilize grinding tool surface of the work to be added to carry out grinding, certain chuck of the present invention also can be used for clamping similar axial workpiece.

Existing most of chuck structure simplicity of design, the not good and workpiece of clamping effect easily loosens in process, affects the operating efficiency of actual lathe.Therefore, the floating clamp designed after a kind of relatively reasonably improvement is necessary.

As shown in Fig. 1 to Figure 20, floating clamp after this improvement comprises shell 10, stationary center 60 and the clamping device 30 for holding workpiece, wherein: clamping device 30 comprises and being arranged in shell 10 and holder 31 in hollow structure and be movably arranged on the driving disc spacing pressing 32 at shell 10 rear, the key grip 33 and multiple sub-folder gripping member 34 that arrange around holder 31 axial line is provided with in holder 31 front, each sub-folder gripping member 34 is installed on holder 31 respectively, the head end of key grip 33 is articulated and connected on holder 31, the end of key grip 33 is connected with driving disc spacing pressing 32, holder 31 is flexibly connected with shell 10 by multiple floating regulating part 21, driving disc spacing pressing 32 can drive key grip 33 circuit oscillation, key grip 33 head end is rotated around pin joint, holder 31 produces circumferential displacement in predetermined circumferential domain of walker under key grip 33 drives, holder 31 each sub-folder gripping member 34 related to be gathered or away from workpiece to workpiece, key grip 33 and each sub-folder gripping member 34 are cooperatively interacted realize clamping or unclamping workpiece, in holder 31 moving process, each floating regulating part 21 regulates the float angle of holder 31, stationary center 60 and holder 31 are coaxially arranged, and stationary center 60 also partly stretches in the middle part of holder 31 through shell 10.

Above-mentioned floating regulating part 21 is arranged in shell 10, the Main Function of shell 10 is similar to fixed pedestal, play the effects such as location, support, holder 31 is for installing and locating each holder, coordinate closely between each parts above-mentioned, integral structure layout is compact, easy for installation and install simple, rapidly.Floating clamp after this improvement in an initial condition, before processing: workpiece to be processed (being generally axial workpiece) one end is stretched into rest position in the middle part of each holder (i.e. holder 31 hollow position) and is resisted against on stationary center 60, drive source (motor) is had in chuck outer setting, operator can control driven by motor driving disc spacing pressing 32 by console and rotate, driving disc spacing pressing 32 synchronously drives key grip 33 circuit oscillation and then makes key grip 33 one end draw close to workpiece and coordinate other sub-folder gripping member 34 together clamping work pieces, now grinding tool can start to carry out grinding to workpiece to be processed surface.The present invention adopts key grip 33 and sub-folder gripping member 34 cooperatively interact and clamp or unclamp the mode of workpiece, and the clamp force distribution that the good and workpiece of clamping effect is subject to is even, improves machining accuracy and production efficiency.

In the present invention, shell 10 can belong to a part for other local of grinding machine, also can as a part for chuck of the present invention, or the two one of and the various mechanism fixed needed for it and parts all as a part for the floating clamp after improvement of the present invention.

In prior art, the two ends of general workpiece toply to hold out against by one respectively, then chuck clamping work pieces lateral surface is used, the grinding tool of grinding machine is started working, the axiality that guarantee two is top is needed under such requirement, also to ensure the axiality of workpiece and two top threes simultaneously, due to chuck with to be toply all in a fixed position, insert if workpiece is eccentric in the horizontal direction, just there will be chuck cannot contraposition clamp, the situation of top non-top tight workpiece, just cannot ensure the requirement of above-mentioned axiality, so then can increase the mismachining tolerance of grinding tool, the workpiece size after processing is made not reach requirement, add defect rate.Such as: offer at workpiece two ends in advance will to cause with the top words holding out against hole eccentric setting matched top corresponding be inserted in that axiality can not be guaranteed hold out against in hole, and then result in the problem that workpiece bias inserts.Herein, it should be added that: chuck and top coordinating make most of chuck of the prior art all there is the situation of " presss from both sides a pine ", that is to say, when after chuck clamping work pieces, chuck circumference inwardly applies clamping force to workpiece, this makes just easily to diminish near the top place pressure of chuck, and then occur that the situation of " chuck clamping work pieces, top unclamp workpiece " occurs, reduce job stability, affect follow-up finishing operating efficiency, the normal work of grinding machine cannot be guaranteed, add defect rate.

For solving the problem, also be provided with the floating regulating part 21 matched with clamping device 30 in the present case, the setting of floating regulating part 21, make holder 31 can produce circumferential displacement within the scope of time-schedule float under key grip 33 drives, regulating part 21 primary responsibility that floats in actual mechanical process vertically adjusts, and the adjusting range in the directions such as level is less.After workpiece stretches into region to be held by axiality requirement (namely workpiece is not eccentric inserts), its one side is withstood by stationary center 60, workpiece another side withstands by another of the external world is top, Background control platform controls driving disc spacing pressing 32 and drives key grip 33 to swing, and then key grip 33 head end is drawn close in the middle part of holder 31 and matching pair holder 34 together clamping work pieces, concretely, key grip 33 is adopted first to contact workpiece, according to the annexation of key grip 33 pin joint, then with the fulcrum of key grip 33 and absorption surface for supporting, key grip 33 drive holder 31 moves make each sub-folder gripping member 34 also with absorption surface, finally realize the work of clamping work pieces, otherwise then unclamp workpiece, in this case, each holder of chuck is evenly distributed to the power that workpiece applies, and under the cooperation of floating regulating part 21, holder 31 can be driven by key grip 33 and realize floating and to regulate and in process, holder remains unchanged clamping work pieces, be not easy to occur chucking power tension and cause top pressure to go down situation occur, rationally distributed and smart structural design, grips effect is better, after workpiece bias stretches into region to be held, its one end holds out against by stationary center 60, the key grip 33 that driving disc spacing pressing 32 drives still first contacts workpiece, then continue with the fulcrum of key grip 33 head end and absorption surface as supporting, by the annexation of key grip 33 pin joint, key grip 33 drive holder 31 moves or sidesway make each sub-folder gripping member 34 also with absorption surface, finally realize the work of clamping work pieces, because the holder 31 in this case has certain zone of action, the side-play amount can inserting workpiece according to level automatically adjusts, and the process of the process regulated namely to be key grip 33 drive holder 31 circumference movable (mainly vertical movable), therefore the workpiece that now level is inserted is still level ornaments, although now two top eccentric settings but still can top tight workpiece, grips effect is good, ensure that the normal operation of grinding tool and grinding machine well, for grinding machine processing improves reliability and operating efficiency, reduce defect rate.In this case clamping device 30 and floating regulating part 21 be arranged so that workpiece enters time eccentricity issues is also little a little, flexibility is large and easy for installation, is convenient to dismounting and safeguards.

Preferably, stationary center 60 is located in the middle part of shell 10 by top mount pad 71, be also provided with rear seal-cover 72 at shell 10 rear and stationary center 60 through rear seal-cover 72, rear seal-cover 72 is tightly connected by sealing ring 73 and holder 31, driving disc spacing pressing 32.Further, have gap and tightened on top mount pad 71 both sides by a capping bolt 74 in the middle part of the top mount pad 71 in preferred this case, after unclamping top mount pad 71, stationary center 60 is in active state, now can be exited floating clamp; After tightening top mount pad 71, be toply in locking state and be fixedly arranged in holder 31 for top tight workpiece; Rear seal-cover 72 and corresponding sealing ring 73 be arranged so that stationary center 60 coordinates closely with overall chuck parts, good airproof performance; Each parts compact in design above-mentioned, mounts and dismounts also all more convenient, ensure that the stability of work.

Preferably, above-mentioned key grip 33 is thin slice claw, and the quantity of sub-folder gripping member 34 is two, and sub-folder gripping member 34 is for being fixed on the adjusting bolt on holder 31.The head end of the sub-folder gripping member 34 in preferred the present invention is provided with against boss, the head end of each sub-folder gripping member 34 stretches into holder 31 region to be held (i.e. middle part hollow position), during Workpiece clamping its lateral surface respectively with the contacting against boss of key grip 33 head end and sub-folder gripping member 34 head end, such structural design makes workpiece and chuck wear and tear to reduce, ensure processing work quality and stability, each component structural is simple, improve space availability ratio, install, dismounting, change, safeguard all more convenient.

In preferred the present invention, three holders (i.e. a key grip 33, two sub-folder gripping members 34) and the fulcrum line of absorption surface are that equilateral triangle is arranged and this equilateral barycenter oftriangle is positioned on the axial line of holder 31.The space that three holder head ends fence up and the position that workpiece stretches into, such holder topology layout is compact, and the clamp force distribution that workpiece is subject to is even, and chuck clamping effect is better.Holder and two sub-folder gripping members 34 are preferably placed on same plane, and such topology layout is more reasonable, compact, and area occupied is little, ensure that the operating efficiency of clamping effect and grinding machine.

Preferably, the end of key grip 33 offers pawl strip through hole 331, and driving disc spacing pressing 32 is connected with key grip 33 by pusher dog pin 35, and pusher dog pin 35 one end is also inserted solid on driving disc spacing pressing 32 through shell 10, the other end stretches in pawl strip through hole 331.Such syndeton installation and removal are all more convenient, and drive pusher dog pin 35 to rotate when driving disc spacing pressing 32 rotates, pusher dog pin 35 drives key grip 33 to move, and makes clamping device 30 clamping work pieces, said structure simplicity of design and easy to maintenance, and area occupied is little.Pusher dog pin 35 in preferred this case comprises intercalation fixing part 351 and connecting portion 352, intercalation fixing part 351 is inserted solid on driving disc spacing pressing 32 and length is less than the length of connecting portion 352, connecting portion 352 to stretch in pawl strip through hole 331 and is connected with key grip 33, the effect of such pusher dog pin 35 conveying capacity is better, each parts connect closely, make driving disc spacing pressing 32 drive key grip 33 more laborsaving, make key grip 33 stressed more even, improve job stability.

Under original state, pusher dog pin 35 is positioned at pawl strip through hole 331 head end, when needs clamping work pieces, controlling driving disc spacing pressing 32 drives pusher dog pin 35 together to rotate, now pusher dog pin 35 swings towards rotation direction promotion key grip 33, key grip 33 head end start around holder 31 pin joint rotate and to workpiece draw close until and absorption surface, key grip 33 end tilt; After key grip 33 head end and absorption surface, in conjunction with key grip 33 and holder 31 annexation and insert situation according to practical work piece, now pusher dog pin 35 drives key grip 33 promote with the fulcrum of this holder head end and absorption surface for supporting or offset holder 31, holder 31 is subjected to displacement together with two sub-folder gripping members 34, two sub-folder gripping members 34 are contacted with workpiece, and now three holders are in pre-clamped condition; Then under the drive of driving disc spacing pressing 32, pusher dog pin 35 starts to be moved to its end by pawl strip through hole 331 head end, in moving process, pusher dog pin 35 drives key grip 33 and finally makes key grip 33 and two sub-folder gripping members 34 together by Workpiece clamping, after Workpiece clamping, even if pusher dog pin 35 continues mobile, key grip 33 also can not continue to apply clamping force, and now three holders are in clamped condition.Arranging of pawl strip through hole 331 is reasonable, easy to process, ensure that the reliability of overall chuck work.

Preferably, the lateral surface of key grip 33 head end is surrounded with multiple arcwall face 332.Be formed with projection between each arcwall face 332, make key grip 33 head end and absorption surface area more, frictional force is larger, and not easily defective work piece.Key grip 33 head end adopted in this case arranges and can apply larger clamping force to workpiece, cooperatively interact with above-mentioned sub-folder gripping member 34, make clamping effect better and a bit movable, 2 fixing method of clamping make workpiece stability in process be ensured well; Inwardly gather in process at key grip 33 head end, key grip 33 end outwards tilts, and each arcwall face 332 and workpiece compact siro spinning technology, ensure that the reliability of clamping, improves the stability of chuck work.

When above-mentioned three holders are in pre-clamped condition, certain arcwall face 332 of key grip 33 head end has matched with other two sub-folder gripping members 34 merging clamping work pieces, the structural design that multiple arcwall face 332 is connected, key grip 33 is coordinated closely with shaft-like workpiece, and clamping effect is better.

Preferably, in shell 10, be provided with one insert solid slide block 36 above holder 31, the head end of key grip 33 is articulated and connected on slide block 36.Slide block 36 facilitates the installation of key grip 33 and plays position-limiting action to it, ensure that the accuracy of adjusting deviation during clamping, and the installation and removal of slide block 36, holder 31, key grip 33 three are also all more convenient, and practicality is good.

Preferably, on holder 31 symmetry offer be obliquely installed and with two sub-folder gripping members 34, two oblique through holes 311 one to one, each sub-folder gripping member 34 is all located in corresponding oblique through hole 311, holder 31 also offers oblique through hole 311 two communication passage 312 one to one with two, each oblique through hole 311 is all by corresponding communication passage 312 and extraneous UNICOM, each sub-folder gripping member 34 is all fixed on holder 31 by the first set bolt 37, corresponding sub-folder gripping member 34 to be fixed in corresponding tiltedly through hole 311 through corresponding holder 31 and corresponding communication passage 312 by each first set bolt 37 all successively.

The shape of above-mentioned communication passage 312 can be chosen as " L " shape, " one " font etc. according to actual conditions, briefly, communication passage 312 is exactly the gap at corresponding tiltedly holder 31 position on through hole 311 both sides, the first set bolt 37 is made well to be fixed on holder 31 by the sub-folder gripping member 34 of correspondence, fixed.After unscrewing the first set bolt 37, the sub-folder gripping member 34 of correspondence is extracted out or advanced and can regulate the position of sub-folder gripping member 34 according to the actual requirements, make the chuck in this case can be applicable to the workpiece of more diameters, easy to use, flexibility is large, and versatility is wide.

Further, shell 10 offers and coaxially with two sub-folder gripping members 34 arrange and circularly one to one regulate through hole 11.Operator can by instrument through circular regulate through hole 11 and stretch in shell 10 sub-folder gripping member 34 is regulated, flexibility is large, does not limit to by environment for use, convenient and practical and circular adjustment through hole 11 is easy to process.

Preferably, in the middle part of holder 31, symmetry offers two via holes 313, shell 10 is covered with annular end cap 40, annular end cap 40 offers and two via holes 313, two ending cover holes 41 one to one, positioning seat 50 is inserted with in the middle part of annular end cap 40, positioning seat 50 is made up of the annular base body 51 be connected as a single entity and two locating dowels 52, annular base body 51 lateral surface is evenly distributed with multiple anti-skidding protruding 53, two locating dowels 52 be symmetrical arranged and with two via hole 313 one_to_one corresponding, each locating dowel 52 is also inserted solid in corresponding via hole 313 through corresponding end cap bore 41.Certainly, other adopt the scheme of first being fixed by holder 31 to be also feasible to the mode that sub-folder gripping member 34 regulates, and repeat no more herein.

In the present invention, supporting is provided with annular end cap 40 and positioning seat 50, during frock, workpiece first stretches in shell 10 through annular base body 51 and annular end cap 40 again and is clamped by chuck, annular end cap 40 preferably and shell 10 be tightly connected, avoiding the impurity such as the dust in external world during work pieces process, iron filings to enter in shell 10 affects equipment running, extends the service life of chuck, is convenient to clean and safeguards.

Owing to being provided with the holder 31 with floating activity interval in chuck of the present invention, and sub-folder gripping member 34 is installed on holder 31, when needing to regulate above-mentioned sub-folder gripping member 34, need first with positioning seat 50, holder 31 to be fixed, with instrument, sub-folder gripping member 34 position is regulated again, easy to operate, make sub-folder gripping member 34 regulate accurately, ensure grips effect.

In the present invention, annular end cap 40 and positioning seat 50 can belong to a part for other local of grinding machine, also can as a part for the floating clamp after improvement of the present invention, or the two one of and the various mechanism fixed needed for it and parts all as a part for the floating clamp after improvement of the present invention.

In this case anti-skidding protruding 53 both can be chosen as point-like projection, also strip projected parts can be chosen as, structure is simple and reasonable in design, anti-skidding protruding 53 arrange can increase positioning seat 50 and extraneous frictional force, can anti-skidding and increase feel, make this positioning seat 50 be more prone to hand-held in use, installation process, be not easy landing.

In the present invention, each floating regulating part 21 is separately positioned between holder 31 lateral surface and shell 10 medial surface, and the quantity of the regulating part 21 that preferably floats is at least three.

Each floating regulating part 21 all has oneself floating adjusting angle scope in shell 10, each floating regulating part 21 combines the time-schedule float adjusting angle scope namely defining overall chuck, in above-mentioned adjustable range, it is movable that key grip 33 can drive holder 31 to make circumference, make chuck energy clamping work pieces and solve eccentricity issues etc., make this chuck have floating regulatory function, clamping effect is good, ensure that the stability of work.

Concrete, the regulating part 21 that floats comprising the internal fixtion head 211 be installed on holder 31 lateral surface, being installed in the extenal fixation head 212 on shell 10 medial surface and the floating spring for connecting internal fixtion head 211 and extenal fixation head 212.

The floating regulating part 21 of the floating clamp after this improvement in an initial condition, each internal fixtion head 211 is around being arranged on the lateral surface of holder 31, each extenal fixation head 212 correspondence is arranged on shell 10 medial surface, the all flexible floating adjustment space of each floating spring, the setting of the overall regulating part 21 that floats, make holder 31 can carry out the floating adjustment of circumference under key grip 33 drives, the problems such as the eccentric insertion of workpiece can be solved well, make above-mentioned three holder clamping effect better.Key grip 33 in preferred this case is arranged on holder 31 top position, two sub-folder gripping members 34 are arranged on holder 31 lower position, three's distributing position is that similar equilateral triangle is arranged, entirety in the corresponding this case preferably main floating adjustment direction of regulating part 21 of floating is vertical direction, is aided with the adjustment of other circumferential direction such as side direction.

Further, internal fixtion head 211 offers internal fixtion hole 2111, extenal fixation head 212 offers the extenal fixation hole 2121 that arrange corresponding to internal fixtion hole 2111, the two ends of floating spring are respectively equipped with and arrange in closed loop and internal buckle ring, the outer buckle ring corresponding with internal fixtion hole 2111, extenal fixation hole 2121, internal buckle ring passes corresponding internal fixtion hole 2111 and is connected with internal fixtion head 211, and outer buckle ring passes corresponding extenal fixation hole 2121 and is connected with extenal fixation head 212.By such structural design, floating spring difficult drop-off in the course of the work, and internal fixtion head 211 and extenal fixation head 212 fixed, in each gland, preferably add nut make it fixing more firm, improve chuck functional reliability.

Preferably, ring inner sleeve 22 is installed with in the middle part of shell 10, stationary center 60 also partly stretches in the middle part of holder 31 through top mount pad 71, rear seal-cover 72, inner sleeve 22 successively, it is outer and be flexibly connected with inner sleeve 22 that holder 31 is located at inner sleeve 22, surround between the madial wall of holder 31 and the lateral wall of inner sleeve 22 and form the cavity volume 23 that floats, under the drive of key grip 33, the floating adjustable range of holder 31 is floating cavity volume 23.

The cavity volume 23 that floats is corresponding with the floating adjustable range of each outside floating regulating part 21, and holder 31 displacement that is arranged so that of inner sleeve 22 is unlikely to excessive, limit the scope of activities of holder 31, improve the control accuracy of floating regulating part 21, ensure that job stability.

Preferably, the lateral surface of inner sleeve 22 circumferentially offers multiple inner sleeve and regulates through hole 221, holder 31 is inserted and intrinsicly regulates through hole 221 multiple spacer pin 24 one to one with inner sleeve, each spacer pin 24 one end is all installed on holder 31, and the other end all stretches into corresponding inner sleeve and regulates through hole 221 interior and can regulate the circumferential displacement of generation in through hole 221 in this inner sleeve.Spacer pin 24 in preferred this case and the quantity of corresponding through hole are three, and three spacer pins 24 are evenly distributed in inner sleeve 22, and such structural design can meet real work demand well, also improves space availability ratio.

The cavity volume 23 that floats adds that above-mentioned inner sleeve regulates the cooperation of through hole 221, spacer pin 24, the scope of activities of holder 31 is restricted, play position-limiting action, and the setting of inner sleeve 22 and corresponding through hole, corresponding spacer pin 24 also make holder 31 drive two sub-folder gripping members 34 regulate more accurate, improve the reliability of chuck work, reduce defect rate.

Preferably, the bilateral symmetry of slide block 36 is provided with two slide rails 361, holder 31 offers and two slide rails 361 chute 314 one to one, each slide rail 361 to be all movably arranged in corresponding chute 314 and can straight line slippage in corresponding chute 314, slider row bar shape through hole 362 is offered in the middle part of slide block 36, in slider row bar shape through hole 362, be provided with the second set bolt 25, second set bolt 25 pass slider row bar shape through hole 362 and slide block 36 is fixed on holder 31.

Slide block 36 pairs of key grip 33 play the effects such as spacing, guiding, improve the accuracy that clamping device 30 clamps, ensure that the reliability of chuck work.By regulating the position of the second set bolt 25 in the slider row bar shape through hole 362 of correspondence, the position in the middle part of the relative holder 31 of key grip 33 can be regulated, make the clamping device 30 in this case can clamp the workpiece of more diameters, versatility is wide, easy to adjust.Such as: when needing the diameter of work of clamping larger, unclamp the second set bolt 25, now slide block 36 is in active state, upwards pull slide block 36 that it is moved distance to a declared goal on chute 314, corresponding, key grip 33 owing to being hinged on slide block 36, therefore key grip 33 also along with on move, expand middle part workpiece and stretch into region area, make three holders to clamp larger workpiece.

Further preferably, each slide rail 361 all offers strip groove 363 with the junction of slide block 36.The setting of strip groove 363, slide block 36 is scratched because holder 31 corner is too sharp when slide block 36 can not only be avoided to slide, also the blocking formed due to some position projection can be prevented, can also be used for discharging some impurity that the external world enters slide block 36 place, reasonable in design and easy to process, ensure that the reliability that slide block 36 works.

Preferably, above holder 31, be fixed with fixed cap 26 and the two fastening formation slide block cavity volume 27, slide block 36 is positioned at slide block cavity volume 27.Fixed cap 26 pairs of slide blocks 36 carry out spacing, the overall regulating part 21 that floats are regulated more accurate, ensure that the stability of chuck work, ensure that the yield rate of workpiece.

Preferably, fixed cap 26 is connected with slide block 36 by the 3rd set bolt 28, fixed cap 26 is also inserted with and is connected and the slide block regulating part 29 of energy adjusting slider 36 vertical direction position with slide block 36.After unscrewing the second set bolt 25 and the 3rd set bolt 28, move or move down on can being carried out slide block 36 by adjusting slider regulating part 29, and then the position of adjusting slider 36 (namely regulating the position of key grip 33 in this case), make the chuck in this case can be applicable to the workpiece of more diameters, easy to use, flexibility is large, and versatility is wide.Above-mentioned each parts installation and removal are all more convenient, are convenient to safeguard.

Further, shell 10 offers corresponding with slide block regulating part 29 arrange long regulates through hole 12, preferably the long through hole 12 that regulates is arranged on shell 10 tip position, is the gesture of triangle with above-mentioned two circular through holes 11 that regulate, convenient adjustment operation.Instrument can be passed long adjustment through hole 12 and stretch in shell 10 and operate and then adjusting slider 36 position slide block regulating part 29 by operator, and flexibility is large, does not limit to by environment for use, and convenient and practical and length regulates through hole 12 easy to process.

Specific embodiment described herein is only to the explanation for example of the present invention's spirit.Those skilled in the art can make various amendment or supplement or adopt similar mode to substitute to described specific embodiment, but can't depart from spirit of the present invention or surmount the scope that appended claims defines.

Claims (10)

1. the floating clamp after improving, is characterized in that: comprise shell, stationary center and the clamping device for holding workpiece, wherein:

Described clamping device comprises the holder of setting in the enclosure and in hollow structure and is movably arranged on the driving disc spacing pressing at shell rear, the key grip and some sub-folder gripping members that arrange around holder axial line is provided with in holder front, each sub-folder gripping member is installed on holder respectively, the head end of described key grip is articulated and connected on holder, the end of key grip is connected with driving disc spacing pressing, described holder is flexibly connected with shell by some floating regulating parts, described driving disc spacing pressing can drive key grip circuit oscillation, key grip head end is rotated around pin joint, described holder produces circumferential displacement in predetermined circumferential domain of walker under key grip drives, holder each sub-folder gripping member related to be gathered or away from workpiece to workpiece,

Described stationary center and holder are coaxially arranged, and described stationary center also partly stretches in the middle part of holder through shell.

2. the floating clamp after a kind of improvement according to claim 1, it is characterized in that: described stationary center is located in the middle part of shell by top mount pad, also be provided with rear seal-cover at shell rear and stationary center through rear seal-cover, described rear seal-cover is tightly connected by sealing ring and holder, driving disc spacing pressing.

3. the floating clamp after a kind of improvement according to claim 2, it is characterized in that: described key grip is thin slice claw, the quantity of described sub-folder gripping member is two, and described sub-folder gripping member is the adjusting bolt be fixed on holder.

4. the floating clamp after a kind of improvement according to claim 1 or 2 or 3, it is characterized in that: the end of described key grip offers pawl strip through hole, described driving disc spacing pressing is connected with key grip by pusher dog pin, described pusher dog pin one end is also inserted solid on driving disc spacing pressing through shell, the other end stretches in pawl strip through hole.

5. the floating clamp after a kind of improvement according to claim 1 or 2 or 3, is characterized in that: be provided with one in the enclosure and insert solid slide block above holder, the head end of described key grip is articulated and connected on slide block.

6. according to claim 3 a kind of improve after floating clamp, it is characterized in that: offer on shell and coaxially to arrange with two sub-folder gripping members and circularly one to one to regulate through hole.

7. the floating clamp after a kind of improvement according to claim 1, it is characterized in that: each floating regulating part is separately positioned between holder lateral surface and shell medial surface, described floating regulating part comprising the internal fixtion head be installed on holder lateral surface, being installed in the extenal fixation head on shell medial surface and the floating spring for connecting internal fixtion head and extenal fixation head.

8. the floating clamp after a kind of improvement according to claim 1 or 2 or 3 or 7, it is characterized in that: in the middle part of shell, be installed with ring inner sleeve, described stationary center also partly stretches in the middle part of holder through top mount pad, rear seal-cover, inner sleeve successively, it is outer and is flexibly connected with inner sleeve that described holder is located at inner sleeve, surrounds and form floating cavity volume between the madial wall of described holder and the lateral wall of inner sleeve.

9. the floating clamp after a kind of improvement according to claim 8, it is characterized in that: on the lateral surface of inner sleeve, circumferentially offer some inner sleeves regulate through hole, holder is inserted and intrinsicly regulates through hole some spacer pins one to one with inner sleeve, each spacer pin one end is all installed on holder, and the other end all stretches into corresponding inner sleeve and regulates through hole interior and can produce circumferential displacement in this inner sleeve adjustment through hole.

10. the floating clamp after a kind of improvement according to claim 5, it is characterized in that: above holder, be fixed with fixed cap and the two fastening formation slide block cavity volume, described slide block is positioned at slide block cavity volume, described fixed cap is connected by the 3rd set bolt and slide block, fixed cap is also inserted with and is connected and the slide block regulating part of energy adjusting slider vertical direction position with slide block, shell offers the length that arranges corresponding to slide block regulating part and regulates through hole.