CN103769639A

CN103769639A - External clamped type precise electronic chuck with bidirectional limiting

Info

Publication number: CN103769639A
Application number: CN201410051796.3A
Authority: CN
Inventors: 王雷; 谭久彬; 金国良
Original assignee: Harbin Institute of Technology
Current assignee: Harbin Institute of Technology
Priority date: 2014-02-14
Filing date: 2014-02-14
Publication date: 2014-05-07
Anticipated expiration: 2034-02-14
Also published as: CN103769639B

Abstract

The invention discloses an external clamped type precise electronic chuck with bidirectional limiting. An upper plate and a lower plate are respectively and fixedly mounted on the upper end surface and the lower end surface of a cylinder body; wedged blocks are fixedly mounted on the upper plate; a piston assembly is inserted into a wedged block central hole and is formed inside a sealed chamber of the cylinder body; laminated springs are sleeved upon the piston assembly; the upper end surfaces and the lower end surfaces of the laminated springs are respectively contacted and matched with the upper plate and the piston assembly; an exhaust hole is formed in the cylinder body; a rotating motor is fixedly connected with a screw rod through a coupler and is inserted into a screw rod nut; the upper end of the rotating motor is contacted with the lower part of the piston assembly; the screw rod nut is fixedly connected with the lower plate; elastic chain blocks are sleeved upon the outer parts of the wedged blocks; limiting rings are sleeved upon the outer parts of the elastic chain blocks; adaptive plates are arranged at the upper end parts of the piston assembly through pre-tightening screws; the adaptive plates are fixedly connected with the elastic hinges; adjusting knobs are assembled on the adaptive plates; the limiting screws and the limiting columns are inserted into the adaptive plates and are in threaded connection with the wedged plates. The mechanism is simple in structure, good in working quality, high in reliability and high in adaptive capacity.

Description

With bidirectionally limited external clamping type electric precise chuck

Technical field

The invention belongs to work binder tool, relate generally to the accurate annular workpieces clamping device in equipment manufacture field.

Background technology

In ultraprecise metrology and measurement and ultraprecise manufacture field, at a high speed, clamping device stable, registration is the basic guarantee that carries out accurate measurement and aero-engine assembling.At present, along with the progress of material science, and the raising of the accuracy class of ultra precise measurement instrument and ultraprecise processing and manufacturing equipment, the design application of high-precision annular workpieces is more and more extensive, and the utensil in its process becomes the basis that guarantees machining accuracy.

HeFei University of Technology proposes the axial fastening chuck of a kind of oscillating rod type (the axial fastening chuck of a kind of oscillating rod type.Patent publication No.: CN201210212982.1).This conceptual design power chuck body and expansion chuck body, be radially uniformly distributed three chutes and be embedded with end pawl and pawling, top is provided with oscillating bar assembly, this structure can overcome the Workpiece structure problem that tradition chuck is difficult to clamping when complicated.The problem of this scheme is, adopts axial grip, is not suitable for thin wall cylinder-shaped workpiece.

Beijing Qixing Huachuang Electronics Co., Ltd proposes a kind of disk clamping device (disk clamping device.Patent publication No.: CN201110365937.5).This scheme mainly comprises chuck main body, cam, limited block, at least three hold assemblies, when cam rotates with chuck main body, limited block is radially fixed described hold assembly along chuck main body, the feature of this structure is the clip position that does not limit manipulator, has realized the clamping to pan in the situation of or else damaging clipped object part.The problem of this scheme is, adopts wild card design, clamps inhomogeneously, can produce deformation to profile, very important concerning ultraprecise part.

Patent No. US4840387 has proposed the work in coordination chucking device of tight lock of a kind of halfnut and chuck, the feature of this structure is that reliability is high, can facilitate manual adjustments chuck to tighten degree, problem is that structure is complicated a little, need the ratio of corresponding raising device for the clamping of large-scale workpiece, cause the frictional force of adjusting to increase, be unfavorable for assembling and be installed.

On the whole, traditional scroll chuck, multi-jaw chuck clamping device, because of self natural defect to workpiece discontinuity, make likely surface of the work to be produced in assembling process the damage of unrepairable.Therefore, design a shortcoming that can overcome traditional chuck structure, and have that stability is high simultaneously, registration, clamping device to advantages such as workpiece surface damage are little, significant to accurate assembling manufacturing industry.

Summary of the invention

Object of the present invention is exactly the problem existing for above-mentioned prior art, and in conjunction with actual demand, design provides a kind of with bidirectionally limited external clamping type electric precise chuck, reaches and improves accurate annular workpieces crudy, object adaptable, easy to use.

Technical scheme of the present invention is:

On the upper and lower end face of stack shell, be closely fixedly mounted with respectively upper plate and lower plate, wedge is fixedly fitted on upper plate, in the inner formation of stack shell airtight chamber; The bar portion of piston assembly is inserted in wedge centre bore, the piston portion of piston assembly is fitted in the inner airtight chamber forming of stack shell, airtight chamber is separated into upper chamber and the lower chambers cut off completely, folded spring is sleeved in piston assembly, and be positioned at stack shell upper chamber, the upper surface of described folded spring contacts cooperation with upper plate lower surface, and the lower surface of folded spring contacts cooperation by packing ring with the piston portion of piston assembly; Electric rotating machine is affixed through shaft coupling and leading screw, and leading screw is inserted in feed screw nut, and upper end, through stack shell lower chambers, contacts with the piston portion bottom of piston assembly, and feed screw nut is fixed in lower plate center; The elastic hinge piece that can radially shrink or expand is sleeved on wedge upside outside, and spacing collar is nested on elastic hinge piece outside; On the bar portion upper end of piston assembly, be fixedly mounted with keyset by pretension screw, described keyset and elastic hinge piece are affixed, by threaded engagement, adjustment knob is fitted on keyset, stop screw and limited post are inserted on keyset, and stop screw and limited post are threaded with wedge, so far form with bidirectionally limited external clamping type electric precise chuck.

The good result of technological innovation of the present invention and generation is:

Motor-driven is convenient succinct, and Machine Design and maintenance are simplified greatly; Uniform force application, reduces the non-linear effects that unbalance stress produces; Can realize the Based Intelligent Control of operating rate, the easy adjusting of input and output torque and operating rate; Simple in structure, light, installation and maintenance are simple, low cost of manufacture, reliability is high, long service life can realize buffering.

Accompanying drawing explanation

Accompanying drawing is to show structure intention with bidirectionally limited external clamping type electric precise chuck entirety.

Piece number in figure: 1-lower plate; 2-stack shell; 2-1 steam vent; 3-folds spring; 4-spacing collar; 5-piston assembly; 6-elastic hinge piece; 7-stop screw; 8-pretension screw; 9-adjusts knob; 10-limited post; Youngster-keyset; 12-wedge; 13-packing ring; 14-upper plate; 15-feed screw nut; 16-leading screw; 17-shaft coupling; 18-electric rotating machine.

The specific embodiment

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

With a bidirectionally limited external clamping type electric precise chuck, it is characterized in that: on the upper and lower end face of stack shell 2, be closely fixedly mounted with respectively upper plate 14 and lower plate 1, wedge 12 is fixedly fitted on upper plate 14, in the inner formation of stack shell 2 airtight chamber; The bar portion of piston assembly 5 is inserted in wedge 12 centre bores, the piston portion of piston assembly 5 is fitted in the inner airtight chamber forming of stack shell 2, airtight chamber is separated into upper chamber and the lower chambers cut off completely, folded spring 3 is sleeved in piston assembly 5, and be positioned at stack shell 2 upper chamber, the upper surface of described folded spring 3 contacts cooperation with upper plate 14 lower surfaces, and the lower surface of folded spring 3 contacts cooperation by packing ring 13 with the piston portion of piston assembly 5; Electric rotating machine 18 is affixed through shaft coupling 17 and leading screw 16, and leading screw 16 is inserted in feed screw nut 15, and upper end, through stack shell 2 lower chambers, contacts with the piston portion bottom of piston assembly 5, and feed screw nut 15 is fixed in lower plate 1 center; The elastic hinge piece 6 that can radially shrink or expand is sleeved on wedge 12 upside outsides, and spacing collar 4 is nested on elastic hinge piece 6 outsides; On the bar portion upper end of piston assembly 5, be fixedly mounted with keyset 11 by pretension screw 8, described keyset 11 is affixed with elastic hinge piece 6, by threaded engagement, adjustment knob 9 is fitted on keyset 11, stop screw 7 and limited post 10 are inserted on keyset 11, and stop screw 7 and limited post 10 are threaded with wedge 12.

When operation is used, when electric rotating machine 18 forward rotation, drive leading screw 16 to move upward, the folded spring 3 of piston assembly 5 compression, and promote piston assembly 5 and do work, drive keyset 11, elastic hinge piece 6 to move upward, the epicoele room air of stack shell 2 is discharged through steam vent 2-1 simultaneously, elastic hinge piece 6 and wedge 12 are disengaged, elastic hinge piece 6 shrinks, elastic hinge piece 6 tops contact with annular workpiece, the clamping of implement device and workpiece; When electric rotating machine 18 rotates backward, folded spring 3 elastic force externally do work, promoting piston assembly 5 moves downward, and then make elastic hinge piece 6 and wedge 12 pressurized again, the radial component of contact-making surface expands outwardly elastic hinge piece 6, elastic hinge piece 6 tops and annular workpiece disengage again, and implement device separates with workpiece.

In the outer card holder of the accurate annular workpieces of described electrodynamic type, stop screw 7 is for limited piston assembly 5 movement travel upwards, and then the shrinkage degree of restriction elastic hinge piece 6; Adjust knob 9 and be used in conjunction with limited post 10, by the height of prior setting limited post 10, rotation is adjusted knob 9 and is made the two contact, then can accurately limit the degree that expands outwardly of elastic hinge piece 6; In the time that elastic hinge piece 6 does not have restriction accurately not extend out degree, 4 supplementary position-limiting actions of spacing collar.

Claims

1. one kind with bidirectionally limited external clamping type electric precise chuck, it is characterized in that: on the upper and lower end face of stack shell (2), be closely fixedly mounted with respectively upper plate (14) and lower plate (1), it is upper that wedge (12) is fixedly fitted in upper plate (14), in the inner formation of stack shell (2) airtight chamber; The bar portion of piston assembly (5) is inserted in wedge (12) centre bore, the piston portion of piston assembly (5) is fitted in the inner airtight chamber forming of stack shell (2), airtight chamber is separated into upper chamber and the lower chambers cut off completely, folded spring (3) is sleeved in piston assembly (5), and be positioned at stack shell (2) upper chamber, the upper surface of described folded spring (3) contacts cooperation with upper plate (14) lower surface, and the lower surface of folded spring (3) contacts cooperation by packing ring (13) with the piston portion of piston assembly (5); Electric rotating machine (18) is affixed through shaft coupling (17) and leading screw (16), leading screw (16) is inserted in feed screw nut (15), upper end is through stack shell (2) lower chambers, contact with the piston portion bottom of piston assembly (5), feed screw nut (15) is fixed in lower plate (1) center; The elastic hinge piece (6) that can radially shrink or expand is sleeved on wedge (12) upside outside, and spacing collar (4) is nested on elastic hinge piece (6) outside; On the bar portion upper end of piston assembly (5), be fixedly mounted with keyset (11) by pretension screw (8), described keyset (11) is affixed with elastic hinge piece (6), to adjust knob (9) by threaded engagement is fitted on keyset (11), it is upper that stop screw (7) and limited post (10) are inserted into keyset (11), and stop screw (7) and limited post (10) are threaded with wedge (12).