CN102950554A

CN102950554A - Clamping device

Info

Publication number: CN102950554A
Application number: CN2012104900772A
Authority: CN
Inventors: 牛晓武
Original assignee: Cama Luoyang Measurement and Control Equipments Co Ltd
Current assignee: Cama Luoyang Measurement and Control Equipments Co Ltd
Priority date: 2012-11-27
Filing date: 2012-11-27
Publication date: 2013-03-06
Anticipated expiration: 2032-11-27
Also published as: CN102950554B

Abstract

The invention relates to a clamping device. The clamping device comprises a cylindrical basal body of which the axis is extended along the front and back direction; wherein a clamping part for clamping a workpiece is arranged at the outer circumferential surface of the basal body; an upper snap ring and a lower snap ring are arranged at the outside of the basal body along the vertical direction; an air cylinder for driving the upper snap ring and the lower snap ring to relatively move is arranged inside the basal body; a piston for dividing the air cylinder into a rod chamber and a rodless chamber is movably arranged in an air cylinder chamber along the vertical direction; a piston rod connected with the upper end face of the piston is arranged in the rod chamber of the air cylinder; the piston rod is in guide match with the basal body and is fixedly connected with the upper snap ring; and the air cylinder is in guide match with the basal body by a connection structure and is fixedly connected with the lower snap ring. The clamping device is suitable for the clamping and accurate positioning of a cylinder workpiece, simple and convenient to operate, and accurate in positioning; and the clamping force is controllable.

Description

A kind of clamping device

Technical field

The present invention relates to a kind of clamping device.

Background technology

Workpiece is being processed or all needed to adopt anchor clamps with its clamping and positioning during dismounting at present, vice or other clamping devices of adopting clamp more in existing clamping device, the most employing of these anchor clamps is regulated manually workpiece is clamped, and generally clamps by rule of thumb, and clamping force is uncontrollable.

Application publication number is that the Chinese patent application " cylinder type clamping device " of CN 102179788A discloses a kind of clamping device that adopts air cylinder driven that workpiece is clamped.Comprise the fixed block that is installed on the base, slide by the clamping that push rod is fixedly connected with cylinder, during use, workpiece to be clamped is positioned between fixed block and the grip slide, and grip slide moves to fixed block under the promotion of cylinder, with Workpiece clamping between fixed block and grip slide, adopt cylinder to clamp driving, clamping force is controlled, reliable clamping, and precision is high.But this clamping device location is unreliable, especially for cylindrical workpiece, when need to accurately locating the position that then needs to adjust this clamping device to workpiece, operate comparatively loaded down with trivial details, inefficiency.

Summary of the invention

The purpose of this invention is to provide a kind of clamping device to the cylindrical workpiece registration.

For addressing the above problem, the technical solution used in the present invention is:

A kind of clamping device, comprise the cylindrical base that axis extends along fore-and-aft direction, the matrix outer circumference surface is provided with the clamping part for holding workpiece, the matrix outside is provided with snap ring and lower snap ring along the vertical direction, be provided with in the described matrix for driving the along the vertical direction cylinder of relative motion of upper snap ring and lower snap ring, in the described cylinder chamber along the vertical direction guiding movement be equipped with the piston that cylinder is divided into rod chamber and rodless cavity, be provided with the piston rod that is connected with the piston upper surface in the described cylinder rod chamber, piston rod cooperates with the matrix guiding and is fixedly connected with upper snap ring, and cylinder cooperates with the matrix guiding by syndeton and is fixedly connected with lower snap ring.

Described piston rod is provided with the clamping air admission hole that communicates with described rod chamber, and described syndeton offers the air admission hole that loosens that communicates with described rodless cavity.

Described syndeton be the upper end be positioned at cylinder chamber and be fixedly connected with rodless cavity, push rod that lower end and matrix guiding cooperates and is fixedly connected with lower snap ring.

Be provided with the first sealing ring between described piston and the cylinder wall.

Be provided with the second sealing ring between described push rod and the cylinder wall.

Described matrix outer peripheral face offers keeps supplying the along the vertical direction draw-in groove of guiding movement of snap ring and lower snap ring, is provided with rubber ring in the described draw-in groove.

The circle wall that is positioned at described clamping part on the described matrix is provided with for the alignment pin that workpiece is positioned.

Be provided with for hard-wired installing hole in the circle wall away from the rear end of clamping part on the described matrix.

The invention has the beneficial effects as follows: a kind of clamping device, cylindrical workpiece is set in matrix and upper, on the face of cylinder between the lower snap ring, workpiece is positioned over, between lower snap ring and the matrix, make the piston motion, the piston driving piston rod movement, piston rod is fixedly connected with upper snap ring, therefore the upper snap ring of piston rod drive moves along the matrix radially-directed, cylinder lower end and lower snap ring are fixed, therefore snap ring moved along the matrix radially-directed under cylinder drove, make snap ring and lower snap ring generation relative motion, thus will be in the up and down clamping of the cylindrical workpiece between snap ring and the matrix.The present invention adopts air cylinder driven to clamp, and clamping force is controlled, and reliable clamping adopts arc surface that cylindrical workpiece is carried out clamping and positioning, registration.

Further, piston rod is provided with the clamping air admission hole that communicates with the rod chamber on piston top, and syndeton is provided with the air admission hole that loosens that communicates with the rodless cavity of piston bottom, adopts from different pore air inlets and realizes the clamping of workpiece and unclamp, and is simple to operate.

Further, be provided with rubber ring in the draw-in groove, when clamping, can play cushioning effect, extension fixture service life.

Further, be provided with alignment pin at the periphery of the clamping part of matrix, can further accurately locate cylindrical workpiece.

Description of drawings

Fig. 1 is the structural representation of the embodiment of the invention;

Fig. 2 is the cutaway view of Fig. 1;

Fig. 3 is the clamped condition figure of Fig. 1;

Fig. 4 is the releasing orientation figure of Fig. 1.

The specific embodiment

Embodiments of the invention are elaborated to the present embodiment below in conjunction with accompanying drawing shown in Fig. 1～4:

A kind of clamping device, comprise the cylindrical base 1 that axis extends along fore-and-aft direction, matrix 1 fore end outer circumference face is for being used for the clamping part of clamping cylindrical workpiece, the periphery of clamping part is provided with for the alignment pin 8 that the location accurately is installed being held workpiece, matrix 1 rear end has installs fixing installing hole 14 to this clamping device, matrix 1 outer circumference surface offers draw-in groove, matrix 1 radially offers pilot hole in relative up and down position along it, on matrix 1 outer peripheral face, lower corresponding position is provided with upper snap ring 2 and the lower snap ring 3 that can move along draw-in groove, on, be provided with rubber ring 10 between lower snap ring and the draw-in groove wall, the maximum chord length of upper snap ring 2 and lower snap ring 3 is all less than the diameter of matrix 1, upper snap ring 2 offers the snap ring connecting hole with the pilot hole opposite position that matrix 1 top is offered, lower snap ring 3 offers lower snap ring connecting hole with the pilot hole opposite position that matrix 1 bottom is offered, matrix 1 is provided with and drives the along the vertical direction cylinder 6 of relative motion of snap ring and lower snap ring, in the cylinder 6 along the vertical direction guiding movement be equipped with piston 4, piston 4 is separated into rod chamber and rodless cavity with cylinder chamber, piston rod 42 is positioned at rod chamber, and be connected with piston 4 upper surfaces, piston rod 42 cooperates with the pilot hole guiding on matrix 1 top and is threaded with upper snap ring connecting hole, adopt upper locking nut 71 lockings, the piston rod center offers piston centre porosity 41, piston rod 42 offers radially pore 43 in piston 4 upper end surfaces, piston centre porosity 41 1 ends are connected with air feed equipment in use, piston centre porosity 41 consists of with pore 43 radially and clamps air admission holes, clamping air admission hole is communicated with rod chamber, piston 4 adopts 131 sealings of the first sealing ring with cylinder wall, and piston rod 42 is provided with upper gasket 11 with matrix 1 inner peripheral surface contact position; Be connected with push rod 5 by screw 9 in the rodless cavity, push rod 5 upper ends are positioned at rodless cavity and adopt the second sealing ring 132 to be sealed and matched with cylinder wall, the second sealing ring 132 is positioned at screw 9 tops, push rod 5 lower ends pass from cylinder 6 bottoms, and cooperate with the pilot hole of matrix 1 bottom guiding, push rod 5 is threaded with lower snap ring 3 and locks by lower locking nut 72, push rod 5 centers are provided with loosens air admission hole 51, loosening air admission hole 51 1 ends is connected with air feed equipment in use, the other end is communicated with rodless cavity, and push rod 5 is provided with lower gasket 12 with matrix 1 inner peripheral surface contact position.

When needs clamp workpiece, workpiece be will be held and matrix 1 outer peripheral face and upper snap ring will be sleeved on, clamping part between the lower snap ring, pressed gas enters from the piston centre porosity 41 of piston rod 42, and enter in the cylinder chamber by pore 43 radially, because radially pore 43 is positioned at piston 4 upper surfaces, therefore gas enters in the rod chamber on piston 4 tops, along with the pushing piston 4 that enters of pressed gas moves downward, because the piston rod 42 on the piston 4 links together with upper snap ring 2, therefore the upper snap ring 2 of piston rod 42 drives moves downward, simultaneously, cylinder 6 moves upward, because cylinder 6 links together with push rod 5, therefore drive push rod 5 and move upward, push rod 5 drives the lower snap ring 3 that is attached thereto together and moves upward, and the arc surface jam-packed of upper snap ring 2 and lower snap ring 3 is enclosed within on the face of cylinder of workpiece of matrix 1 clamping part, cylindrical workpiece is by upper, lower snap ring clamps, as shown in Figure 3.

When needs unclamp workpiece, the air admission hole 51 that loosens on pressed gas and the push rod 5 is connected, make pressed gas pass in the rodless cavity of piston 4 bottoms from loosening air admission hole 51, along with the pushing piston 4 that enters of pressed gas moves upward, because piston rod 42 is connected with upper snap ring 2, therefore the upper snap ring 2 of piston rod 42 drives moves up, upper snap ring 2 opens and leaves the periphery of matrix clamping part, simultaneously, cylinder 6 moves downward with push rod 5, drives the lower snap ring 3 that is threaded with push rod 5 and moves down, lower snap ring 3 also opens and leaves the periphery of matrix clamping part, on, lower snap ring unclamps clamping, and device is in releasing orientation, and cylindrical workpiece can be from matrix and upper, take out between the lower snap ring, as shown in Figure 4, the present invention is by the conversion of control air inlet, can realize the Quick-clamped of cylindrical workpiece or unclamps, and is simple to operation.

Claims

1. clamping device, it is characterized in that: comprise the cylindrical base that axis extends along fore-and-aft direction, the matrix outer circumference surface is provided with the clamping part for holding workpiece, the matrix outside is provided with snap ring and lower snap ring along the vertical direction, be provided with in the described matrix for driving the along the vertical direction cylinder of relative motion of upper snap ring and lower snap ring, in the described cylinder chamber along the vertical direction guiding movement be equipped with the piston that cylinder is divided into rod chamber and rodless cavity, be provided with the piston rod that is connected with the piston upper surface in the described cylinder rod chamber, piston rod cooperates with the matrix guiding and is fixedly connected with upper snap ring, and cylinder cooperates with the matrix guiding by syndeton and is fixedly connected with lower snap ring.

2. clamping device according to claim 1, it is characterized in that: described piston rod is provided with the clamping air admission hole that communicates with described rod chamber, and described syndeton offers the air admission hole that loosens that communicates with described rodless cavity.

3. clamping device according to claim 1 and 2 is characterized in that: described syndeton be the upper end be positioned at cylinder chamber and be fixedly connected with rodless cavity, push rod that lower end and matrix guiding cooperate and be fixedly connected with lower snap ring.

4. clamping device according to claim 3 is characterized in that: be provided with the first sealing ring between described piston and the cylinder wall.

5. clamping device according to claim 3 is characterized in that: be provided with the second sealing ring between described push rod and the cylinder wall.

6. clamping device according to claim 3 is characterized in that: described matrix outer peripheral face offers keeps supplying the along the vertical direction draw-in groove of guiding movement of snap ring and lower snap ring, is provided with rubber ring in the described draw-in groove.

7. clamping device according to claim 3, it is characterized in that: the circle wall that is positioned at described clamping part on the described matrix is provided with for the alignment pin that workpiece is positioned.

8. clamping device according to claim 3 is characterized in that: be provided with for hard-wired installing hole in the circle wall away from the rear end of clamping part on the described matrix.