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KR-20260063916-A - Jig apparatus for workpiece center alignment

KR20260063916AKR 20260063916 AKR20260063916 AKR 20260063916AKR-20260063916-A

Abstract

The present invention relates to a workpiece centering jig capable of finding and machining the center of a workpiece, comprising: a first lever having a pinion gear connected to one end and a handle connected to the other end, with a first central hole formed in the center thereof; a moving part including a pair of first rack gears connected to the pinion gear and moving in opposite directions by the rotation of the pinion gear, and a pair of support parts connected to the pair of first rack gears and having their spacing adjusted according to the movement of the first rack gears; and a housing part having the moving part and the pinion gear located on its inner surface, and a first moving hole formed on its side through which the first rack gear can enter and exit.

Inventors

  • 정지현
  • 고경남

Assignees

  • 제주대학교 산학협력단

Dates

Publication Date
20260507
Application Date
20241031

Claims (6)

  1. A first lever having a pinion gear connected to one end and a handle connected to the other end, with a first central hole formed in the center thereof, A moving part comprising a pair of first rack gears connected to the pinion gear and moving in opposite directions by the rotation of the pinion gear, and a pair of support members connected to the pair of first rack gears and having their spacing adjusted according to the movement of the first rack gears. A housing part having the above-mentioned moving part and the above-mentioned pinion gear located on its inner surface, and a first moving hole formed on the side through which the first rack gear can enter and exit. A workpiece center alignment jig including
  2. In Paragraph 1, A connecting tube inserted into the first central hole and having a second central hole formed in its central part, and A second lever including a diameter adjustment part connected to the end of the above-mentioned connecting pipe Includes more, The above diameter adjustment part A diameter housing part having an internal receiving space, A guide plate that is accommodated inside the diameter housing portion, connected to the upper surface of the connecting pipe, and has a spiral hole formed toward the second central hole. A plurality of second rack gears accommodated inside the diameter housing portion and connected to the guide plate, and A plurality of rack guides accommodated inside the diameter housing portion and disposed between the second rack gears Includes, When the diameter housing part is rotated, the second rack gear moves along the guide plate and adjusts the diameter of the second central hole. Workpiece center alignment jig.
  3. In Paragraph 2, The second rack gear and the rack guide are each characterized by having three or more. Workpiece center alignment jig.
  4. In Paragraph 2, The second lever is connected to the first lever by a bearing, so that the first lever and the second lever can each operate independently. Workpiece center alignment jig.
  5. In Paragraph 1, The above support member includes a pair of vertical supports and a horizontal support connecting the vertical supports, One of the pair of vertical supports is fixed to one of the first rack gears and the other vertical support is fixed to the other first rack gear. Workpiece center alignment jig.
  6. In Paragraph 1, On both sides of the lower surface of the housing portion, a second moving hole is formed through which the support portion can move, and a gear holder to which the pinion gear is connected is formed protrudingly in the center thereof. Workpiece center alignment jig.

Description

Jig apparatus for workpiece center alignment Jig apparatus for workpiece center alignment The present invention relates to a workpiece centering jig that enables machining by finding the center of the workpiece. When machining workpieces, it is often necessary to perform operations such as forming a hole or marking the precise center of the workpiece. However, if an operator manually marks the center of the workpiece, there is a high probability of errors. Therefore, there is a need for the development of a device capable of marking or machining the center of the workpiece at an accurate location. FIG. 1 is a perspective view of a workpiece center alignment jig according to one embodiment of the present invention. Figure 2 is a diagram showing the usage state of the workpiece centering jig illustrated in Figure 1. FIG. 3 is a perspective view of the housing portion illustrated in FIG. 1. FIG. 4 is an exploded perspective view of the second lever shown in FIG. 1. Fig. 5 is a perspective view of the moving part illustrated in Fig. 1. Figure 6 is a cross-sectional view along VI-VI of Figure 1. FIG. 7 is a half-sectional perspective view of the first lever and the second lever shown in FIG. 6. Hereinafter, embodiments of the present invention will be described in detail with reference to the attached drawings so that those skilled in the art can easily implement the present invention. However, the present invention may be embodied in various different forms and is not limited to the embodiments described herein. Throughout the specification, similar parts are denoted by the same reference numerals. FIG. 1 is a perspective view of a workpiece centering jig according to one embodiment of the present invention, FIG. 2 is a view of the workpiece centering jig shown in FIG. 1 in use, FIG. 3 is a perspective view of the housing part (40) shown in FIG. 1, FIG. 4 is an exploded perspective view of the second lever (20) shown in FIG. 1, FIG. 5 is a perspective view of the moving part (30) shown in FIG. 1, FIG. 6 is a cross-sectional view along VI-VI of FIG. 1, and FIG. 7 is a half-sectional perspective view of the first lever and the second lever shown in FIG. 6. A workpiece center alignment jig according to one embodiment of the present invention will be described with reference to FIGS. 1 to 7. A workpiece centering jig according to one embodiment of the present invention includes a first lever (10), a moving part (30), and a housing part (40). The first lever (10) has a pinion gear (12) connected to one end and a handle part (11) connected to the other end, and a first central hole (111) is formed in the central part that penetrates from the handle part (11) to the pinion gear (12). Although the handle portion (11) is shown as having a protrusion formed on the outer side, the shape of the first lever (10) can be various shapes, such as a circle. The moving part (30) includes a pair of first rack gears (31) and a pair of support parts (32), and each support part (32) includes a pair of vertical supports (321) and a horizontal support (322) connecting each vertical support (321). At this time, one of the pair of vertical supports (321) is fixed to one first rack gear (31) and the other vertical support (321) is fixed to the other first rack gear (31). A pair of first rack gears (31) are connected to the pinion gear (12) and move in opposite directions when the pinion gear (12) rotates. At this time, a pair of support members (32) connected to a pair of first rack gears (31) also move together with the first rack gears (31), so that the distance between the support members (32) changes. For example, if the first rack gear (31) moves in a direction away from each other, the distance between the support members (32) increases, and conversely, if the first rack gear (31) moves in a direction closer to each other, the distance between the support members (32) decreases. A moving part (30) and a pinion gear (12) are located on the inside of the housing part (40), and a pair of first moving holes (41) are formed on the side of the housing part (40) through which a pair of first rack gears (31) can enter and exit. Referring to FIGS. 2 and 3, since a pair of first rack gears (31) are positioned facing each other with the pinion gear (12) in between, the first moving hole (41) is formed at a diagonal position on the opposite side of the housing part (40). On both sides of the lower surface of the housing part (40), a second moving hole (43) is formed through which the support part (32) can move. A portion of the support member (32) protrudes outward from the housing member (40) to secure the workpiece. When the first rack gear (31) moves, the support member (32) can move along the second moving hole (43) together with the first rack gear (31). Additionally, a gear holder (42) protrudes inwardly from the lower surface of the housing portion (40) to guide the connection of the pinion gear (12). A through hole is formed in the cen