CN209304126U - A kind of eccentric fixture of shape positioning - Google Patents
A kind of eccentric fixture of shape positioning Download PDFInfo
- Publication number
- CN209304126U CN209304126U CN201822125852.XU CN201822125852U CN209304126U CN 209304126 U CN209304126 U CN 209304126U CN 201822125852 U CN201822125852 U CN 201822125852U CN 209304126 U CN209304126 U CN 209304126U
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- workpiece
- eccentric
- fixture
- positioning
- guide pad
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Abstract
A kind of eccentric fixture of shape positioning, including fixture base, using positioning surface center as boundary on the workpiece positioning surface of the fixture base, the top half of workpiece positioning surface is successively fixed with fixture nut block from top to bottom, guide pad, eccentric locating piece, the briquetting pilot hole that the guide pad is equipped with is slidably matched a workpiece briquetting, guide pad is stretched out outside the lower part of workpiece briquetting, the lower end surface of the workpiece briquetting is equipped with the arc groove that Open Side Down, a threaded rod is threadedly engaged on the fixture nut block, the threaded rod passes through the union being equipped with and connect with workpiece briquetting, the bias locating piece is equipped with a positioning convex platform, the truncation surface of the positioning convex platform is the ellipse coincideing with workpiece elliptical aperture, the eccentric locating shaft of lower half portion fixed setting one of the workpiece positioning surface, the fixture nut block, guide pad, eccentric locating piece, Eccentric locating shaft is point-blank.
Description
Technical field
The utility model relates to a kind of positioning fixture, in particular to a kind of eccentric fixture of shape positioning.
Background technique
When being processed to the entire plane of the starting front motor cover of universal generator, since product structure is smaller, to inclined
Heart degree is more demanding, generallys use eccentric orfice and positions to it.A slotted eye in product is passed through with a M6 screw,
Product is fixed in tooling, when rotating screw fastening workpiece, the rotation of screw will drive product rotation, in turnery processing
Cause product is unilateral to scrap.Clamping screw needs to use allen wrench, and not only screw and spanner all easily slide, but also make for a long time
With rear, the threaded hole stripped thread damage in tooling will lead to entire tooling and scrap, therefore product tooling low efficiency, quality are also unstable
It is fixed.
Summary of the invention
The purpose of this utility model is in view of the deficiencies of the prior art, to provide a kind of eccentric fixture of shape positioning, energy
It improves the accuracy of workpiece positioning and increases working efficiency, the processing quality of workpiece is made to be guaranteed.
The technical solution of the utility model is: a kind of eccentric fixture of shape positioning, including fixture base, the fixture bottom
Using positioning surface center as boundary on the workpiece positioning surface of seat, the top half of workpiece positioning surface is successively fixed with fixation from top to bottom
Nut block, guide pad, eccentric locating piece, the briquetting pilot hole that the guide pad is equipped with are slidably matched a workpiece briquetting, workpiece
Guide pad is stretched out outside the lower part of briquetting, the lower end surface of the workpiece briquetting is equipped with the arc groove that Open Side Down, the fixed spiral shell
A threaded rod is threadedly engaged on mother tuber, the threaded rod passes through the union being equipped with and connect with workpiece briquetting, the eccentric positioning
Block is equipped with a positioning convex platform, and the truncation surface of the positioning convex platform is the ellipse coincideing with workpiece elliptical aperture, and the workpiece is fixed
The eccentric locating shaft of lower half portion fixed setting one of plane, the fixture nut block, guide pad, eccentric locating piece, eccentric positioning
Axis is point-blank.
The one side that the guide pad and fixture base are affixed is equipped with a boss, and guide pad is inserted into fixture base by the boss
The position of upper corresponding boss, which is arranged in a guide pad locating slot, forms positioning, and the guide pad is connect by screw with fixture base
It is fixed.
The fixture base is equipped with a positioning block mounting hole, and the bias locating piece is interference fitted in locating piece mounting hole
In.
The fixture base is equipped with an eccentric positioning shaft hole, and the bias locating shaft is interference fitted in eccentric positioning shaft hole
In.
The union is I-shaped structure, is clamped by the T connected in star that I-shaped structure and workpiece briquetting upper end are equipped with
Fixed, the union is connect with threaded rod axially position, and can be rotated relative to threaded rod.
The circular arc radian of the arc groove is identical as excircle of workpiece radian.
By adopting the above technical scheme: the bias locating piece and eccentric locating shaft form eccentric positioning to workpiece, are processing
Eccentric locating piece and eccentric locating shaft form constraint to the movement of workpiece in the process, due to the positioning convex platform and elliptical aperture of ellipse
Size coincide, therefore workpiece will not because generate rotation due to cause product is unilateral to scrap.Have between the union and threaded rod
Relative rotary motion, and the T connected in star of I-shaped union and workpiece briquetting is firmly connected together, therefore threaded rod
Relative rotation will drive union and move downward, and be slidably matched since the briquetting pilot hole of workpiece briquetting and guide pad forms,
Guide pad constrains the movement of workpiece briquetting, and the radian of the arc groove of workpiece briquetting lower end surface and excircle of workpiece radian
Unanimously, therefore union by the T connected in star being clamped passes motion to workpiece briquetting, and workpiece briquetting is forced to move downwardly to pressure
Clamping of workpieces has the function that firm workpiece.
The guide pad plays the connection transmitting between this three in threaded rod, union, workpiece briquetting very big
Effect, guide pad need to be accurately positioned in fixture base, therefore the guiding of boss insertion fixture base is provided on guide pad
Block locating slot, positions guide pad.
The bias locating piece is interference fitted in locating piece mounting hole, and it is eccentric fixed that the bias locating shaft is interference fitted in
In the axis hole of position, it is convenient for changing when being worn caused by eccentric locating piece and eccentric locating shaft are because of long-time service, making for tooling can be improved
With the service life, and when the elliptical aperture of workpiece and bearing pore size change, it is conveniently replaced various sizes of eccentric locating piece
With eccentric locating shaft.
The utility model is described in further detail with specific embodiment with reference to the accompanying drawings of the specification.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model；
Fig. 2 is the C-C of Fig. 1 to cross-sectional view；
Fig. 3 is the schematic diagram of fixture base；
Fig. 4 is the diagrammatic cross-section of fixture nut block；
Fig. 5 is the diagrammatic cross-section of guide pad；
Fig. 6 is the structural schematic diagram of workpiece briquetting；
Fig. 7 is the diagrammatic cross-section of eccentric locating piece；
Fig. 8 is the top view of eccentric locating piece；
Fig. 9 is the diagrammatic cross-section of eccentric locating shaft.
In attached drawing, 1 is fixture base, and 1-1 is guide pad locating slot, and 1-2 is locating piece mounting hole, and 1-3 is eccentric positioning
Axis hole, 2 be fixture nut block, and 3 be guide pad, and 3-1 is briquetting pilot hole, and 4 be eccentric locating piece, and 4-1 is positioning convex platform, and 5 are
Workpiece briquetting, 5-1 are arc groove, and 5-2 is T connected in star, and 6 be threaded rod, and 7 be union, and 8 be eccentric locating shaft.
Specific embodiment
Referring to Fig. 1 to Fig. 9, a kind of embodiment of the eccentric fixture of shape positioning, including fixture base 1, the fixture bottom
Using positioning surface center as boundary on the workpiece positioning surface of seat 1, the top half of workpiece positioning surface is successively fixed with from top to bottom
Determine nut block 2, guide pad 3, eccentric locating piece 4, an eccentric locating shaft 8 is arranged in the lower half portion of workpiece positioning surface, and described solid
Determine nut block 2, guide pad 3, eccentric locating piece 4, eccentric locating shaft 8 point-blank.The fixture base 1 is equipped with certain
Position block mounting hole 1-2, the bias locating piece 4 are interference fitted in locating piece mounting hole 1-2, which is equipped with
The truncation surface of one positioning convex platform 4-1, the positioning convex platform 4-1 is the ellipse coincideing with workpiece elliptical aperture, the fixture base 1
It is equipped with an eccentric positioning shaft hole 1-3, the bias locating shaft 8 is interference fitted in eccentric positioning shaft hole 1-3, eccentric locating piece
4 and eccentric locating shaft 8 eccentricity it is identical as workpiece, the elliptical aperture of workpiece is put into the positioning convex platform 4-1 of eccentric locating piece 4
In, the bearing hole of workpiece is put into the eccentric positioning shaft hole 1-3 of eccentric locating shaft 8, eccentric positioning is formed to workpiece.It is described solid
The two sides for determining nut block 2 are fixed in fixture base 1 by screw, and the screw thread of an annular knurl handwheel is threadedly engaged on the fixture nut block
Bar 6, the one side being affixed on the guide pad 3 with fixture base 1 are equipped with a boss, and the boss is inserted into corresponding fixture base 1
In the guide pad locating slot 1-1 being arranged at position, guide pad 3 is formed and is positioned, the two sides of the guide pad 3 are fixed on by screw
Briquetting pilot hole 3-1 in fixture base 1, and on the guide pad 3 is slidably matched a workpiece briquetting 5.The workpiece briquetting 5 it is upper
End is equipped with T connected in star 5-2, and the T row groove 5-2 that the threaded rod 6 passes through the I-shaped union 7 and workpiece briquetting that are equipped with is clamped
Fixed, the union 7 is connect with 6 axially position of threaded rod, and has relative rotation, therefore the rotation of threaded rod 6 with threaded rod 6
It will drive union 7 to move downward.Since workpiece briquetting 5 is slidably matched under the constraint of guide pad 3 with briquetting pilot hole 3-1,
Therefore union 7 passes motion to workpiece briquetting 5 by the T connected in star 5-2 being clamped, and workpiece briquetting 5 is forced to move downwardly to
Workpiece pressing, and have the radian of the arc groove 5-1 of 5 lower end surface of workpiece briquetting consistent with excircle of workpiece radian, reach further
The purpose of fixed workpiece.
By above structure it is found that eccentric locating piece 4 and eccentric locating shaft 8 are all to be fixed on fixture base using interference fit
On 1, eccentricity needed for not only meeting workpiece, but also when eccentric locating piece 4 and the eccentric long-time service of locating shaft 8 are ground
After damage, worker's dismounting and change can be convenient for.If the elliptical aperture and bearing pore size of workpiece are changed, the mode of interference fit
It is also convenient for replacing various sizes of eccentric locating piece 4 and eccentric locating shaft 8.In the utility model, fixture base 1 passes through ring flange
Be directly connected on lathe, after workpiece is installed to fixture base 1, do not need to carry out other debugging again, can directly to workpiece into
Row processing, to greatly improve working efficiency.What in addition the fixture nut block 2 of the utility model was threadedly engaged is annular knurl hand
The threaded rod 6 of wheel, in actual operation, worker does not need spanner, and avoiding causes due to long-time service causes 6 stripped thread of threaded rod
Tooling is scrapped, and worker operation is more simple and convenient.
The utility model improves the positioning accuracy of workpiece, so that the processing quality of workpiece be made to be improved, optimizes
Operation structure, but also processing efficiency is improved.
Claims (6)
1. a kind of eccentric fixture of shape positioning, including fixture base (1), it is characterised in that: the workpiece of the fixture base (1)
Using positioning surface center as boundary on positioning surface, the top half of workpiece positioning surface is successively fixed with fixture nut block from top to bottom
(2), guide pad (3), eccentric locating piece (4), the briquetting pilot hole (3-1) that the guide pad (3) is equipped with are slidably matched a work
Part briquetting (5) stretches out guide pad (3) outside the lower part of workpiece briquetting (5), the lower end surface of the workpiece briquetting (5) be equipped with opening to
Under arc groove (5-1), be threadedly engaged a threaded rod (6) on the fixture nut block (2), the threaded rod (6) is by setting
Some unions (7) connect with workpiece briquetting (5), and the bias locating piece (4) is equipped with a positioning convex platform (4-1), described fixed
The truncation surface of position boss (4-1) is the ellipse coincideing with workpiece elliptical aperture, and the lower half portion fixation of the workpiece positioning surface is set
An eccentric locating shaft (8) is set, the fixture nut block (2), guide pad (3), eccentric locating piece (4), eccentric locating shaft (8) are one
On straight line.
2. a kind of eccentric fixture of shape positioning according to claim 1, it is characterised in that: the guide pad (3) and folder
The one side that tool pedestal (1) is affixed is equipped with a boss, and guide pad (3) is by corresponding to boss in boss insertion fixture base (1)
Position, which is arranged in a guide pad locating slot (1-1), forms positioning, and the guide pad (3) is connect by screw with fixture base (1)
It is fixed.
3. a kind of eccentric fixture of shape positioning according to claim 1, it is characterised in that: on the fixture base (1)
Equipped with a positioning block mounting hole (1-2), the bias locating piece (4) is interference fitted in locating piece mounting hole (1-2).
4. a kind of eccentric fixture of shape positioning according to claim 1, it is characterised in that: on the fixture base (1)
Equipped with an eccentric positioning shaft hole (1-3), the bias locating shaft (8) is interference fitted in eccentric positioning shaft hole (1-3).
5. a kind of eccentric fixture of shape positioning according to claim 1, it is characterised in that: the union (7) is work
Font structure is connected and fixed, the union by the T connected in star (5-2) that I-shaped structure is equipped with workpiece briquetting (5) upper end
(7) it connect, and can be rotated relative to threaded rod (6) with threaded rod (6) axially position.
6. a kind of eccentric fixture of shape positioning according to claim 1, it is characterised in that: the arc groove (5-1)
Circular arc radian it is identical as excircle of workpiece radian.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822125852.XU CN209304126U (en) | 2018-12-18 | 2018-12-18 | A kind of eccentric fixture of shape positioning |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822125852.XU CN209304126U (en) | 2018-12-18 | 2018-12-18 | A kind of eccentric fixture of shape positioning |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209304126U true CN209304126U (en) | 2019-08-27 |
Family
ID=67677374
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822125852.XU Active CN209304126U (en) | 2018-12-18 | 2018-12-18 | A kind of eccentric fixture of shape positioning |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209304126U (en) |
-
2018
- 2018-12-18 CN CN201822125852.XU patent/CN209304126U/en active Active
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