CN217648191U - Self-centering workbench - Google Patents

Abstract

The utility model discloses a self-centering workbench, which belongs to the field of tool fixtures and solves the problems of complicated structure and high manufacturing cost of a centering fixture in the prior art; external power and electric control device intervention are required; the centering range is difficult to adjust, and the universality is not strong; the labor cost is higher. It includes barrel, centering table, a plurality of centre gripping unit, and centre gripping unit swing joint is on the barrel, and the barrel embeds compression spring, and the spring housing is on the axis body, and axis body, barrel, centering table axis coincidence, centre gripping unit around barrel swing joint on the workstation, and the distance between the centre gripping unit equals, and centre gripping unit equals with the barrel distance. And placing the workpiece to be centered on the centering workbench, enabling the cylinder to move downwards by the gravity of the workpiece to be centered, and driving the clamping unit to clamp and center the workpiece by the cylinder. The utility model discloses simple structure, the practicality is strong, and easy maintenance does not have outside power and electrical control device, and centering scope is adjustable, reduces the human cost.

Description

Self-centering workbench

Technical Field

The utility model relates to an anchor clamps, concretely relates to from centering fixture belongs to the frock clamp field.

Background

In a machining or machining process, it is often necessary to clamp a workpiece using a centering fixture so that the center of the workpiece is in the correct position for subsequent machining or inspection. When the centering fixture is adopted, the symmetrical axis, the symmetrical plane or the symmetrical axis is the positioning reference of the workpiece, so that the positioning reference does not generate displacement, and the reference displacement error is zero. Meanwhile, the symmetrical axis, the symmetrical plane or the symmetrical axis is the working procedure reference of the workpiece, the positioning reference and the working procedure reference are overlapped, the reference non-overlapping error is zero, and the total positioning error is zero. Due to the characteristics, the positioning datum of the workpiece can be unchanged, and the positioning datum does not generate displacement, so that the centering and clamping effects are realized. Therefore, the centering fixture is mainly suitable for positioning and clamping workpieces which are symmetrical in geometric shape and take a symmetrical axis, a symmetrical plane or the symmetrical axis as a process reference.

Currently, there are several types of centering fixtures:

firstly, the following steps: the centering fixture is moved at equal intervals, and the original acting force is evenly distributed to each positioning (clamping) element through the inner linkage device, so that the workpiece is positioned and clamped simultaneously. The key point of the equidistant moving and centering clamping is that the clamping force of each clamping (positioning) element on a workpiece is kept equal, and the spatial movement of each clamping (positioning) element is kept accurate and equidistant, so that the aim of automatic positioning and clamping can be ensured. The internal linkage device has various forms, and is divided into a spiral equidistant moving centering clamp, a cam equidistant moving centering clamp, an offset roller equidistant moving centering clamp and a wedge equidistant moving centering clamp according to the driving mode of the internal linkage device on the clamping element;

II, secondly: the elastic chuck centering fixture realizes the positioning and clamping of a workpiece by utilizing the elastic deformation generated by the stress of the elastic chuck arranged on a cylinder body or a mandrel. The mechanism is divided into an external clamping type elastic chuck centering clamp and an internal clamping type elastic chuck centering clamp according to different external diameters and internal diameters of clamping workpieces.

However, the centering fixture in the prior art is complex in structure and high in manufacturing cost, some centering fixtures need external power and an electric control device to intervene, some centering fixtures are difficult to adjust in a centering range and have poor universality, so that the workpiece centering process needs manpower participation, the labor cost is increased, and the production detection efficiency is reduced. In the face of the wide demand of workpiece centering in the mechanical field, the development of a novel centering clamp is urgent.

The applicant has found that the prior art has at least the following technical problems:

1. in the prior art, the centering fixture has a complex structure, high manufacturing cost and inconvenient maintenance;

2. in the prior art, a centering fixture requires external power and an electric control device to intervene;

3. in the prior art, the centering range of a centering fixture is difficult to adjust, and the universality is not strong;

4. in the prior art, the centering fixture has high labor cost.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a self-centering workbench to solve the problems of complex structure and high manufacturing cost of a centering clamp in the prior art; external power and electric control device intervention are required; the centering range is difficult to adjust, and the universality is not strong; the labor cost is high.

In order to achieve the above purpose, the utility model provides a following technical scheme:

the utility model provides a pair of from centering workstation, including barrel, a plurality of centre gripping unit, centering workstation, its characterized in that, barrel one end is equipped with the protecting cover, is equipped with the axis body on the workstation, the axis body is coupled elastic element's one end, elastic element's the other end coupling is in on the protecting cover, the centre gripping unit with barrel swing joint, the centre gripping unit is enclosing barrel swing joint is in on the workstation, the centre gripping unit with distance between the barrel equals, distance between the centre gripping unit equals.

Furthermore, the clamping unit comprises a centering flap and a connecting arm, the barrel is movably connected with one end of the connecting arm, the other end of the connecting arm is movably connected with the centering flap, and the centering flap is movably connected with the workbench.

Furthermore, the barrel body is movably connected with the connecting arm through a pin, the connecting arm is movably connected with the centering flap through a pin, a sliding block is arranged at one end of the centering flap, a sliding rail is arranged on the workbench corresponding to the centering flap, and the sliding block is embedded into the sliding rail so that the centering flap can move horizontally along the sliding rail.

Further, the cross-sectional shape of the centering flap comprises: rectangular, trapezoidal, tile-shaped.

Further, elastic element is compression spring, and arranges in inside the barrel, the axis body inserts inside the barrel, be equipped with linear bearing between axis body outer wall and the barrel inner wall, compression spring one end and protecting cover are towards the terminal surface contact of barrel inner wall, and the other end cover is in on the axis body.

Further, the axis of axis body, centering workstation, the workstation coincide.

Furthermore, a plurality of damping devices are arranged on the contact surface of the centering workbench and the workpiece to be centered, and the damping devices are ball strips and used for reducing the friction resistance between the workpiece to be centered and the centering workbench.

Based on the technical scheme, the embodiment of the utility model provides a can produce following technological effect at least:

(1) The utility model provides a pair of from centering workstation, simple structure, the practicality is strong, easy maintenance, and complete set of structure does not have external power and electric control device and intervenes, and the power source of structure is exactly product itself, realizes from the centering operation as the power of mechanism through product self weight.

(2) The utility model provides a pair of from centering workstation, centering scope is adjustable, the commonality is strong, applicable in multiple model, multiple product.

(3) The utility model provides a pair of from centering workstation effectively reduces the human intervention to product centering location operation, and the effective control recruitment number subtracts this increase.

Drawings

FIG. 1 is an assembly view of an embodiment of the present invention;

fig. 2 is a cross-sectional view of an embodiment of the invention;

fig. 3 is a schematic view of the centering of the embodiment of the present invention.

In the figure: 1. a protective cover; 2. an elastic element; 3. a shaft body; 4. an end cap; 5. a work table; 6. a connecting arm; 7. a centering flap; 8. a centering table; 9. a linear bearing; 10. a support shaft; 11. a countersunk head bolt; 12. a cylindrical head type M4 × 16 socket head cap screw; 13. cylindrical head type M6X 20 socket head cap screw; 14. a drag reduction device; 15. a cylinder body; 16. a slider; 17 a slide rail; 18 cylindrical head type M5 × 20 socket head cap screw; 19. a pin shaft; 20. and a cotter pin.

Detailed Description

The utility model provides a from centering workstation, it is right now to combine attached figure 1, 2, 3 the utility model discloses a preferred embodiment carries out the detailed description.

The utility model discloses preferred embodiment includes barrel 15, a plurality of centre gripping units, centering table 8, workstation 5, and barrel 15 upper end is through the fixed protecting cover 1 of a plurality of cylinder head type M4X 16 hexagon socket head cap screws 12, through countersunk head bolt or adopt the fixed axis body of welding mode 3 on the workstation 5, and the axis body 3 is coupled the one end of elastic element 2, elastic element 2's the other end is coupled protecting cover 1. Elastic element clamping unit and barrel 15 swing joint, clamping unit encloses barrel 15 swing joint on workstation 5, and the distance between clamping unit and the barrel 15 equals, and the distance between the clamping unit equals, and the axis 3, centering table 8, barrel 15, workstation 5 axis coincidence.

Preferably, the table 5 is disc-shaped.

Preferably, the shaft body 3 is inserted into the cylinder body 15, and a linear bearing 9 is arranged between the outer wall of the shaft body 3 and the inner wall of the cylinder body 15, wherein the linear bearing 9 is used for reducing the resistance of the shaft body 3 during linear motion in the cylinder body 15. The elastic element 2 is a compression spring, one end of the compression spring is in contact with the end face of the protective cover facing the inner wall of the cylinder body, and the other end of the compression spring is sleeved on the shaft body.

Preferably, the end cap 4 is fixed at the other end of the cylinder 15 by a cylindrical head type M6 × 20 socket head cap screw 13, and the end cap 4 is used for fixing the linear bearing 9.

The clamping unit comprises a centering flap 7 and a connecting arm 6, the barrel 15 is movably connected with one end of the connecting arm 6, the other end of the connecting arm 6 is movably connected with the centering flap 7, and the centering flap 7 is movably connected with the workbench 5. In the preferred embodiment of the present invention, the centering flap 7 is a rectangular metal sheet, and the cross-sectional shape of the centering flap 7 includes but is not limited to: rectangular, tile-shaped and trapezoidal so as to adapt to different outline profiles of various products.

Preferably, the connecting arm 6 is connected with the protrusion of the cylinder 15 and the protrusion of the centering flap 7 through a pin, the connecting arm 6 can rotate around a pin shaft 19 for a limited angle, one end of the centering flap 7 is provided with a sliding block 16, a sliding rail 17 is arranged on the workbench 5 corresponding to the centering flap 7, and the sliding block 16 is embedded in the sliding rail 17, so that the centering flap 7 can move horizontally along the sliding rail 17.

Preferably, the centering flap 7 is fixed to the slider 16 by means of a M5 x 20 socket head cap screw 18 of cylindrical head type.

In the preferred embodiment of the present invention, the clamping units have three groups, correspondingly, the slide rails 17 have three, and the included angle between the slide rails 17 is 120 degrees and is distributed around the center Y of the worktable 5.

In the preferred embodiment of the present invention, there are two connecting arms 6 in each group of clamping units.

The utility model discloses in the preferred embodiment, 1 up end of protecting cover uses countersunk head bolt 11 to fix centering table 8, and 1 axis of protecting cover and 8 axis coincidence of centering table still include back shaft 10 in the protecting cover 1 to stabilize centering table 8's position.

In the preferred embodiment of the present invention, the upper end surface of the centering table 8 is provided with a resistance reducing device 14 for reducing the frictional resistance between the workpiece to be centered and the upper end surface of the centering table 8.

Preferably, the damping devices 14 are three ball bars, which are distributed around the center of the centering table 8 in a Y shape and form an included angle of 120 degrees with each other.

The utility model discloses preferred embodiment's theory of operation is: a workpiece to be centered is placed on the centering workbench 8, the centering workbench 8 drives the cylinder body 15 to move downwards by taking the shaft body 3 as a center under the action of gravity of the workpiece to be centered, a compression spring is compressed, the cylinder body 15 drives the connecting arm 6 to rotate around a pin while moving downwards, and the connecting arm 6 drives the centering flap 7 to translate along the slide rail 17 towards the axis line direction of the cylinder body 15 so as to clamp the workpiece to be centered. Because the distance between the clamping units and the barrel 15 is equal, the distance between the clamping units is equal, and the axes of the shaft body 3, the centering workbench 8, the barrel 15 and the workbench 5 are superposed, the axial lead of the workpiece to be centered can be fixed at the position superposed with the axial lead of the barrel 15.

After the workpiece to be centered is taken down, the compression spring pushes the cylinder body 15 to ascend by taking the shaft body 3 as a center shaft, the cylinder body 15 drives the connecting arm 6 to rotate around the pin while moving upwards, and the connecting arm 6 drives the centering flap 7 to translate along the sliding rail 17 in the direction opposite to the direction of the axis of the cylinder body 15, so that the centering flap 7 resets.

When the centering flap 7 needs to be replaced, the proper centering flap 7 can be replaced by detaching the M5 × 20 hexagon socket head cap screw 18 and the connecting pin.

It is to be understood that the present invention has been described in terms of the preferred embodiment, and that various changes can be made and equivalents can be substituted for elements thereof without departing from the spirit and scope of the invention, as will be apparent to those skilled in the art. In addition, many modifications may be made to adapt a particular situation to the teachings of the present invention without departing from its spirit or scope. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of the present application are intended to be covered by the present invention.

Claims (10)

1. The utility model provides a from centering table, includes barrel (15), a plurality of centre gripping unit, centering table (8), workstation (5), its characterized in that, barrel (15) one end is equipped with protecting cover (1), is equipped with axis body (3) on workstation (5), the one end of elastic element (2) is coupled in axis body (3), the other end coupling of elastic element (2) is in on protecting cover (1), the centre gripping unit with barrel (15) swing joint, the centre gripping unit is enclosing barrel (15) swing joint be in on workstation (5), the centre gripping unit with distance between barrel (15) equals, distance between the centre gripping unit equals.

2. A self-centering table according to claim 1, wherein said clamping unit comprises a centering flap (7) and a connecting arm (6), said cylinder (15) is movably connected with one end of said connecting arm (6), the other end of said connecting arm (6) is movably connected with said centering flap (7), and said centering flap (7) is movably connected with said table (5).

3. The self-centering workbench according to claim 2, wherein the barrel (15) and the connecting arm (6) are movably connected by a pin, the connecting arm (6) and the centering flap (7) are movably connected by a pin, a slider (16) is arranged at one end of the centering flap (7), a slide rail (17) is arranged on the workbench (5) at a position corresponding to the centering flap (7), and the slider (16) is embedded into the slide rail (17) to enable the centering flap (7) to translate along the slide rail (17).

4. A self-centering table according to claim 3, wherein the centering flap (7) is bolted to the slide (16).

5. A self-centering table according to claim 3, wherein the cross-sectional shape of the centering flap (7) comprises: rectangular, trapezoidal, tile-shaped.

6. A self-centering table according to claim 1, characterized in that said elastic element (2) is placed inside said cylinder (15), said shaft body (3) being inserted inside said cylinder (15).

7. A self-centring table according to claim 1, characterised in that the axes of the shaft (3) and the cylinder (15) coincide.

8. The self-centering workbench according to claim 1, wherein a plurality of drag reduction devices (14) are arranged on the contact surface of the centering workbench (8) and the workpiece to be centered, and the drag reduction devices (14) are used for reducing the frictional resistance between the workpiece to be centered and the centering workbench (8).

9. A self-centring workbench according to claim 8, characterized in that the fairings (14) are ball strips.

10. A self-centering table according to claim 1, wherein said elastic element (2) is a compression spring.

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