TWI400148B - Positioning device - Google Patents

Description

Fixtures

The invention relates to a fixing device.

In industrial production, it is often necessary to fix the workpiece to the machine table in order to machine the workpiece. Currently, commonly used fixtures generally include screws or mechanisms with screws. During operation, the workpiece is placed on the machine table, and the workpiece is fixed on the machine table by tightening the screw, which is time-consuming and has low production efficiency.

In view of this, it is necessary to provide a highly efficient fixing device.

A fixture includes a base, at least three fixed plates, and at least three sets of springs. The base includes a bearing surface and at least one side wall defined on the bearing surface. The at least one side wall defines an interior space having a fixed center. The at least three fixing plates are placed toward the fixing center on the bearing surface in the inner space. The at least three sets of springs are respectively used to connect a corresponding one of the fixing plates to the at least one side wall. The force of the at least three sets of elastic elements faces the fixed center.

When the workpiece is fixed by the fixing device, only the elastic force of the at least three sets of springs is overcome, the at least three fixing plates are opened, the workpiece is placed in the inner space, and the at least three fixing plates are released. The at least three fixing plates will constrain the workpiece under the elastic force of the at least three sets of springs, and fix the workpiece on the bearing surface, which is convenient to operate and high in efficiency.

Referring to FIGS. 1-3, the fixing device 100 of the preferred embodiment of the present invention includes a base 10, three fixing plates 20, and three sets of springs 30.

The base 10 includes a disc-shaped bottom plate 12 and a cylindrical side wall 14. The disc-shaped bottom plate 12 includes a bearing surface 122. The outer diameter of the cylindrical side wall 14 is substantially the same as the diameter of the disc-shaped bottom plate 12. The cylindrical side wall 14 is aligned on the bearing surface 122 perpendicularly to the edge of the disk-shaped bottom plate 12. The cylindrical side wall 14 defines a cylindrical inner space 142. The cylindrical inner space 142 has a fixed center 144, that is, the center of the cylindrical side wall 14. Preferably, the disc-shaped bottom plate 12 is integrally formed with the cylindrical side wall 14.

The three fixing plates 20 have substantially the same shape and are rectangular plates. Each of the fixing plates 20 includes a fixing surface 22. The fixing surface 22 is formed with a bite 222. The three fixed plates 20 are placed upright on the bearing surface 122 and are located within the interior space 142. The three fixing faces 22 face the fixing center 144.

Three sets of springs 30 are used to connect one of the fixed plates 20 to the cylindrical side walls 14, respectively. Specifically, each set of springs 30 includes three springs 30. Each spring 30 connects the fixed plate 20 and the cylindrical side wall 14 substantially along the diametrical direction of the cylindrical side wall 14, and: (1) when the workpiece 200 has a circular cross section, the natural length of a spring 30, a fixed plate The sum of the thickness of 20 and the radius of the workpiece 200 is greater than the inner radius of the cylindrical side wall 14; and (2) the natural length of a spring 30, the thickness of a fixed plate 20, and the workpiece when the workpiece 200 has a non-circular cross section. The sum of half of the longest dimension of the cross section of 200 is greater than the inner radius of the cylindrical sidewall 14. As such, when the workpiece 200 is placed between the fixed plates 20, the springs 30 will be compressed and create a force toward the fixed center 144 to constrain the fixed plate 20 to secure the workpiece 200.

Preferably, the three sets of springs 30 and the three fixing plates 20 are equiangularly distributed on the inner circumference of the cylindrical side wall 14, so that the force balance and fixation of the workpiece 200 are more favorable.

It is to be understood that the disk-shaped base plate 12 is not limited to the embodiment. In other embodiments, other bottom plates having bearing surfaces 122 may be used in place of the disk-shaped bottom plate 12, such as a square bottom plate.

It can be understood that the side wall 14 is not limited to the embodiment. In other embodiments, other sidewalls may be defined that define an interior space 142 having a fixed center 144. For example, a plurality of discrete curved side walls.

It can be understood that the disc-shaped bottom plate 12 and the cylindrical side wall 14 can also be separately formed and assembled into the base 10 by gluing or the like.

It can be understood that the fixing plate 20 is not limited to the embodiment. In other embodiments, a smooth fixation surface 22 (ie, no biting) may be employed.

It can be understood that the number of the springs 30 of each group is not limited to the present embodiment. In other embodiments, more or fewer springs 30 may be employed per group depending on the positioning strength requirements, such as one spring 30 may be employed per group if the positioning strength does not need to be too high.

It can be understood that the number of the fixing plates 20 and the number of sets of the springs 30 are not limited to the present embodiment. In other embodiments, more fixed plates 20 and more sets of springs 30 may be employed depending on the positioning strength requirements.

It will be understood that the spring 30 is not limited to the embodiment. In other embodiments, other spring elements may be used in place of the spring 30, such as a shrapnel.

When the workpiece 200 is fixed by the fixing device 100, only the three sets of the springs 30 are overcome, the three fixing plates 20 are opened, the workpiece 200 is placed in the inner space 142, and the three fixing plates 20 are released, and the three fixing plates 20 are released. The workpiece 200 will be constrained by the elastic force of the three sets of springs 30 to fix the workpiece 200 to the bearing surface 122.

In summary, the present invention has indeed met the requirements of the invention patent, and has filed a patent application according to law. However, the above description is only a preferred embodiment of the present invention, and it is not possible to limit the scope of the patent application of the present invention. Equivalent modifications or variations made by those skilled in the art in light of the spirit of the present invention, for example, the scattering portion may include a lattice pattern surrounded by a plurality of first strip-shaped grooves and distributed along the optical axis of the lens. A spiral pattern composed of a plurality of second strip-shaped grooves in a radial spiral shape, etc., should be included in the following patent application.

100‧‧‧Fixed devices
144‧‧‧Fixed Center
10‧‧‧ Pedestal
20‧‧‧ fixed board
12‧‧‧Disc floor
22‧‧‧Fixed surface
122‧‧‧ bearing surface
222‧‧‧ bite
14‧‧‧Cylindrical side wall
30‧‧‧ Spring
142‧‧‧Cylindrical interior space
200‧‧‧Workpiece

1 is a perspective view of a fixing device according to a preferred embodiment of the present invention.

2 is a top plan view of the fixture of FIG. 1.

3 is a perspective cross-sectional view of the fixture of FIG. 1.

100‧‧‧Fixed devices

144‧‧‧Fixed Center

10‧‧‧ Pedestal

20‧‧‧ fixed board

12‧‧‧Disc floor

22‧‧‧Fixed surface

122‧‧‧ bearing surface

222‧‧‧ bite

14‧‧‧Cylindrical side wall

30‧‧‧ Spring

142‧‧‧Cylindrical interior space

Claims (6)

A fixture comprising:
a base having a bearing surface and at least one side wall formed on the bearing surface, the at least one side wall defining an inner space having a fixed center;
At least three fixing plates placed on the bearing surface in the inner space toward the fixing center; and at least three sets of elastic members for connecting a corresponding one fixing plate to the at least one side wall, The force of at least three sets of elastic elements faces the fixed center. The fixing device of claim 1, wherein the at least one side wall is a cylindrical side wall. The fixing device according to claim 2, wherein the at least three sets of elastic members and the at least three fixing plates are equiangularly distributed on an inner circumference of the side wall. The fixing device according to claim 1, wherein the fixing plate includes a fixing surface facing the fixing center, and the fixing surface is formed with a bite. The fixing device of claim 1, wherein the elastic member is a spring or a spring. The fixing device of claim 1, wherein each set of elastic members comprises three springs.