CN216990871U

CN216990871U - Self-centering clamping device for workpiece

Info

Publication number: CN216990871U
Application number: CN202122340300.2U
Authority: CN
Inventors: 黄国川; 郑加新; 李小兰
Original assignee: Quanzhou Hengyi Machine Co ltd
Current assignee: Quanzhou Hengyi Machine Co ltd
Priority date: 2021-09-26
Filing date: 2021-09-26
Publication date: 2022-07-19
Anticipated expiration: 2031-09-26

Abstract

The utility model provides a self-centering clamping device of work piece, including the location platform, the setting is used for pressing from both sides the clamping mechanism of tight work piece and the synchro mechanism who sets up and make a plurality of clamping mechanism synchronization action at the location bench on the location platform, clamping mechanism includes a plurality of dwangs of rotatable circumference distribution on the location bench and can round trip movement set up the clamping piece that presss from both sides tight work piece on the dwang, the clamping piece includes the cassette with dwang threaded connection and sets up the jack catch in order to press from both sides tight work piece on the cassette, in operation, make a plurality of dwangs rotate simultaneously through synchro mechanism, in order to drive a plurality of clamping pieces simultaneous movement, also can accomplish the correction to the work piece centre of a circle when accomplishing to the work piece clamp tight, and is easy to operate, consuming time is few, and can improve production efficiency greatly.

Description

Self-centering clamping device for workpiece

Technical Field

The utility model belongs to the field of workpiece processing, and particularly relates to a self-centering clamping device for a workpiece.

Background

When workpieces are machined, the working procedures of drilling, tapping and the like are required, the workpieces can be correspondingly machined only by clamping the outer diameter, but the outer diameters of the workpieces are large and small, the diameter size difference is large, and the common clamping tool cannot meet the requirement of large-range outer diameter change; when the clamping tool is fixed on the workbench, the circle center of a workpiece needs to be corrected first; when the circle center is corrected, the clamping tool is placed on the workbench, then the workpiece is clamped, the circle center is corrected from the workpiece, and finally the clamping tool is fixed on the workbench through a screw; each workpiece needs to be rounded, and then is tightly pressed by the pressing plate, the screws and the cushion blocks, so that the processing can be carried out, the consumed time is long, the production efficiency is low, and the further improvement is needed.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defects of the prior art and provide a self-centering clamping device for a workpiece.

The utility model adopts the following technical scheme:

the utility model provides a from centering clamping device of work piece, includes the location platform, set up the clamping mechanism who is used for pressing from both sides tight work piece on the location platform and set up the lazytongs that connects and make a plurality of clamping mechanism synchronization action at the location platform, clamping mechanism includes a plurality of dwangs of rotatable circumference distribution on the location platform and can round trip movement set up the clamping piece of pressing from both sides tight work piece on the dwang, the clamping piece include with dwang threaded connection's cassette and set up the jack catch in order to press from both sides tight work piece on the cassette.

Furthermore, the synchronizing mechanism comprises a first bevel gear arranged on the positioning table and second bevel gears which are respectively arranged on the rotating rods of the plurality of clamping mechanisms and are matched with the first bevel gear.

Furthermore, the clamping mechanism further comprises an adjusting rod which is rotatably arranged between the two adjacent rotating rods, the synchronizing mechanism further comprises a third bevel gear which is arranged on the adjusting rod and matched with the first bevel gear, and the adjusting rod is rotated to drive the third bevel gear on the adjusting rod to rotate so as to drive the first bevel gear to rotate and enable the second bevel gear to rotate and enable the clamping piece to move to clamp the workpiece.

Further, the clamping mechanism further comprises a rotating handle for rotating the adjusting rod.

Further, the positioning table comprises a mounting groove formed in the center of the positioning table for mounting the first bevel gear, a first cavity extending from the side edge of the positioning table radially inwards and communicated with the mounting groove for mounting the rotating rod, and a second cavity extending from the side edge of the positioning table radially inwards and communicated with the mounting groove for mounting the adjusting rod.

Furthermore, the first cavity comprises a rotating groove arranged on the positioning table and used for rotating the rotating rod and a moving groove arranged at the top of the rotating groove and used for moving the clamping piece back and forth.

Furthermore, the device also comprises a dust cover which is arranged on the positioning table and used for sealing the mounting groove.

Furthermore, the jack catch is locked on the cassette through the bolt, form the hole of stepping down that supplies the bolt to pass on the jack catch, be formed with the screw relative with the hole of stepping down on the cassette, the bolt passes the hole of stepping down and fixes the jack catch on the cassette with the screw cooperation.

Furthermore, a plurality of positioning grooves distributed at intervals along the moving direction of the clamping seat are formed in the top surface of the clamping seat, and positioning blocks capable of being embedded into the positioning grooves are formed at the bottom of the clamping jaw.

Furthermore, the clamping jaw comprises a connecting block connected with the clamping seat and a clamping block arranged on the connecting block and used for clamping a workpiece, and the abdicating hole is formed in the connecting block.

From the above description of the present invention, compared with the prior art, the beneficial effects of the present invention are: the clamping mechanism comprises a plurality of rotating rods which are distributed on the circumference, clamping pieces which are in threaded connection with the rotating rods are arranged on the rotating rods, the rotating rods are enabled to rotate simultaneously through a synchronous mechanism so as to drive the clamping pieces to act simultaneously, the center of a circle of a workpiece can be corrected while the workpiece is clamped, the operation is simple, the consumed time is less, and the production efficiency can be greatly improved;

the synchronous mechanism comprises a first bevel gear, a second bevel gear and a third bevel gear, and the adjusting rod is rotated to drive the third bevel gear to rotate so as to enable the plurality of second bevel gears to rotate, so that the plurality of clamping pieces are driven to act simultaneously, and the accuracy of correcting the circle center of the workpiece is ensured;

a plurality of positioning grooves distributed at intervals along the moving direction of the clamping seat are formed in the top surface of the clamping seat, positioning blocks capable of being embedded into the positioning grooves are formed at the bottoms of the clamping jaws, and when the clamping jaw clamping device works, the positioning grooves at proper positions can be selected according to the outer diameter of a workpiece, so that the positioning blocks are embedded into the positioning grooves to complete the positioning of the clamping jaws, and then the clamping jaws are locked and fixed by bolts; the position of the positioning groove is selected to meet the requirement of large-range outer diameter change of different workpieces.

Drawings

FIG. 1 is a schematic view of the structure of the present invention;

FIG. 2 is a schematic view of the clamping mechanism;

FIG. 3 is a schematic view of the positioning table;

FIG. 4 is a cross-sectional view A-A of FIG. 3;

FIG. 5 is a first embodiment of the pawl;

FIG. 6 is a second embodiment of the pawl;

FIG. 7 is a schematic view of a workpiece;

in the figure, 1-positioning table, 2-clamping mechanism, 3-synchronization mechanism, 4-dust cap, 5-workpiece, 11-mounting groove, 12-first cavity, 121-rotation groove, 122-moving groove, 13-second cavity, 21-rotation rod, 22-clamping piece, 221-clamping seat, 222-clamping jaw, 2221-connecting block, 2222-clamping block, 223-abdicating hole, 224-screw hole, 225-positioning groove, 226-positioning block, 23-adjusting rod, 24-rotation handle, 31-first bevel gear, 32-second bevel gear and 33-third bevel gear.

Detailed Description

The utility model is further described below by means of specific embodiments.

Referring to fig. 1 to 7, a self-centering clamping device for a workpiece includes a positioning table 1, clamping mechanisms 2 provided on the positioning table 1 for clamping a workpiece 5, and a synchronizing mechanism 3 provided on the positioning table 1 and connected to synchronize the plurality of clamping mechanisms 2.

The positioning table 1 is disc-shaped and is fixed on the workbench through screws.

The clamping mechanism 2 comprises a plurality of rotating rods 21 which are distributed on the positioning table 1 in a rotatable and circumferential manner, a clamping piece 22 which can move back and forth and is arranged on the rotating rods 21 to clamp the workpiece 5, adjusting rods 23 which are arranged between two adjacent rotating rods 21 in a rotatable manner and a rotating handle 24 for rotating the adjusting rods 23, specifically, four rotating rods 21 are arranged, four adjusting rods 3 are arranged, and the rotating rods 21 and the adjusting rods 23 are alternately arranged on the positioning table 1 at intervals; further, the positioning table 1 is provided with a first cavity 12 extending radially inward from a side surface thereof for mounting the rotating rod 21 and a second cavity 13 extending radially inward from a side surface thereof for mounting the adjusting rod 23, the first cavity 12 including a rotating groove 121 provided on the positioning table 1 for rotating the rotating rod 21 and a moving groove 122 provided on a top of the rotating groove 121 for moving the clamping member 22 back and forth.

The clamping piece 22 comprises a clamping seat 221 in threaded connection with the rotating rod 21 and a clamping jaw 222 arranged on the clamping seat 221 to clamp the workpiece 5, specifically, the clamping jaw 222 is locked on the clamping seat 221 through a bolt, an abdicating hole 223 for the bolt to pass through is formed on the clamping jaw 222, a screw hole 224 opposite to the abdicating hole 223 is formed on the clamping seat 221, and the bolt passes through the abdicating hole 223 and is matched with the screw hole 224 to fix the clamping jaw 222 on the clamping seat 221; the clamping jaw 222 of the present application has two structures, the first structure is that the clamping jaw 222 is a block directly connected with the clamping seat 221; secondly, the jaws 222 include a connecting block 2221 connected to the holder 221 and a clamping block 2222 provided on the connecting block 2221 for clamping the workpiece 5, the relief holes 223 are provided on the connecting block 2221, and the connecting block 2221 extends in the radial direction of the positioning table 1 to increase the maximum distance between the clamping block 2222 and the center of the circle to accommodate the workpiece with a large outer diameter; when in use, the corresponding clamping jaws 222 can be selected according to the outer diameter of the workpiece 5; furthermore, a plurality of positioning grooves 225 are formed on the top surface of the clamping seat 221 and distributed at intervals along the moving direction of the clamping seat 221, positioning blocks 226 embedded in the positioning grooves 225 are formed at the bottom of the clamping jaw 222, and a plurality of positioning grooves 225 extending along the radial direction are arranged on the top surface of the clamping seat 221; the selection of the position of the positioning groove 225 and the selection of the type of the claw 222 are adopted to meet the requirement of large-scale outer diameter change of different workpieces 5.

The synchronous mechanism 3 comprises a first bevel gear 31 which is rotatably arranged on the positioning table 1, second bevel gears 32 which are respectively arranged at the end parts of the plurality of rotating rods 21 and are matched with the first bevel gear 31, and third bevel gears 33 which are respectively arranged at the end parts of the plurality of adjusting rods 23 and are matched with the first bevel gear 31, when the synchronous mechanism works, the rotating handle 24 is used for driving one adjusting rod 23 to rotate, the third bevel gear 33 on the adjusting rod 23 is driven to rotate, the first bevel gear 31 is further driven to rotate, the plurality of second bevel gears 32 and the rest third bevel gears 33 are driven to rotate, the clamping piece 22 is moved to clamp the workpiece 5, the plurality of rotating rods 22 are driven to rotate through one rotating adjusting rod 23, the plurality of clamping pieces 22 are moved synchronously, the workpiece 5 can be clamped, and meanwhile, the workpiece 5 can be automatically centered, the operation mode is simple, and the consumed time is less; specifically, the positioning table 1 further includes a mounting groove 11 formed at a central position thereof for mounting the first bevel gear 31, and a dust cap 4 provided on the positioning table 1 for sealing the mounting groove 11.

This application is through the structure of injecing clamping mechanism 2 and lazytongs 3, rotates in order to drive a plurality of dwang 21 through adjusting lever 23 and rotates, but makes a plurality of clamping piece 22 synchronization motion, also can accomplish the self-centering to work piece 5 when pressing from both sides tight work piece 5, and operation is simple, and is consuming time few to improve production efficiency.

The above description is only a preferred embodiment of the present invention, and therefore should not be taken as limiting the scope of the utility model, and the equivalent variations and modifications made in the claims and the description of the present invention should be included in the scope of the present invention.

Claims

1. A self-centering clamping device for a workpiece, comprising: the clamping mechanism comprises a plurality of rotating rods and a clamping piece, wherein the rotating rods are distributed on the positioning table in a rotatable circumferential manner, the clamping piece can be arranged on the rotating rods in a reciprocating manner to clamp the workpiece, and the clamping piece comprises a clamping seat in threaded connection with the rotating rods and clamping jaws arranged on the clamping seat to clamp the workpiece.

2. A self-centering clamping device for a workpiece as defined in claim 1, wherein: the synchronous mechanism comprises a first bevel gear arranged on the positioning table and second bevel gears which are respectively arranged on the rotating rods of the plurality of clamping mechanisms and are matched with the first bevel gears.

3. A self-centering clamping device for a workpiece as defined in claim 2, wherein: the clamping mechanism further comprises an adjusting rod which is rotatably arranged between the two adjacent rotating rods, the synchronizing mechanism further comprises a third bevel gear which is arranged on the adjusting rod and matched with the first bevel gear, and the adjusting rod is rotated to drive the third bevel gear on the adjusting rod to rotate so as to drive the first bevel gear to rotate and enable the second bevel gear to rotate to enable the clamping piece to move to clamp the workpiece.

4. A self-centering clamping device for a workpiece as defined in claim 3, wherein: the clamping mechanism further comprises a rotating handle for rotating the adjusting rod.

5. A self-centering clamping device for a workpiece as defined in claim 3, wherein: the positioning table comprises a mounting groove formed in the center of the positioning table and used for mounting the first bevel gear, a first cavity body which extends from the side edge of the positioning table radially inwards and is communicated with the mounting groove and used for mounting the rotating rod, and a second cavity body which extends from the side edge of the positioning table radially inwards and is communicated with the mounting groove and is used for mounting the adjusting rod.

6. A device for self-centering clamping of a workpiece as defined in claim 5, wherein: the first cavity comprises a rotating groove and a moving groove, wherein the rotating groove is arranged on the positioning table and used for rotating the rotating rod, and the moving groove is arranged at the top of the rotating groove and used for the clamping piece to move back and forth.

7. A device for self-centering clamping of a workpiece as defined in claim 5, wherein: the dust cover is arranged on the positioning table and used for sealing the installation groove.

8. A self-centering clamping device for a workpiece as defined in claim 1, wherein: the clamping jaw is locked on the clamping seat through a bolt, a yielding hole for the bolt to pass through is formed in the clamping jaw, a screw hole opposite to the yielding hole is formed in the clamping seat, and the bolt passes through the yielding hole and is matched with the screw hole to fix the clamping jaw on the clamping seat.

9. A self-centering clamping device for a workpiece as defined in claim 8, wherein: the top surface of the clamping seat is provided with a plurality of positioning grooves distributed at intervals along the moving direction of the clamping seat, and the bottom of the clamping jaw is provided with a positioning block capable of being embedded into the positioning grooves.

10. A self-centering clamping device for a workpiece as defined in claim 8, wherein: the clamping jaw comprises a connecting block connected with the clamping seat and a clamping block arranged on the connecting block and used for clamping a workpiece, and the abdicating hole is formed in the connecting block.