Jigs for CNC machine tools

Abstract

The present invention relates to a fixture for CNC machine tools, comprising a main body, a force-applying arm, a hook, and a transfer member. The main body is approximately crescent-shaped, with two ends extending outward to form the hook and transfer member, respectively. The transfer member has an arc-shaped support surface on the side opposite the hook, which is designed to mate with the outer surface of a locking member. The technical solution of the present invention has the advantage of preventing slippage when tightening larger nuts using the fixture.

Description

Technical Field

[0001] The present invention relates to the field of hardware tools, in particular to a fixture for numerically controlled machine tools. Background Art

[0002] Traditional automated mechanical equipment, such as CNC machine tools, requires consideration of the locking force when disassembling and assembling round nut parts, which makes disassembly and assembly inconvenient. Therefore, an auxiliary tooling is required to disassemble and assemble the round nuts on the mechanical equipment.

[0003] See also Figure 1 , which is a three-dimensional schematic diagram of an existing tooling, Figure 2 for Figure 1 The figure shows a plan view of the tooling in the state of disassembling and assembling a round nut. As shown in the figure, the thickness of the tooling is generally small. During operation, the hook of the tooling is engaged in the slot of the round nut, the inner arc surface of the tooling body is against the outer cylindrical surface of the round nut, and the force arm applies force and twists the round nut through the tooling body to achieve the disassembly and assembly of the round nut. It is easy to know that when operating round nuts with larger diameters, the existing tooling usually requires a large torsional force. However, due to the deformation of the tooling and the round nut, the tooling of the prior art can easily cause the fit between the hook and the slot to slip, which will not only damage the force-bearing surface of the slot, but also make the staff easily injured due to the inertia of the operation. Summary of the Invention

[0004] The technical problem to be solved by the present invention is: in view of the defects existing in the above-mentioned prior art, a jig for CNC machine tools which is not easy to slip is provided.

[0005] A jig for a numerically controlled machine tool comprises a main body, a force-applying arm, a hook and a transfer part. The projection of the main body is approximately crescent-shaped. The hook is formed by one end of the main body extending toward the center of the inner arc surface of the crescent, and the force-applying surface of the hook is substantially perpendicular to the inner arc surface of the crescent. The transfer part is formed by the other end of the main body extending toward the extension line of the force-applying surface, and the side surface of the transfer part corresponding to the hook protrudes toward the center of the inner arc surface of the crescent, and the side surface is an arc support surface for cooperating with the outer surface of the locking member. The arc support surface is roughly parallel to the inner arc surface of the crescent, and the extension line of the arc support surface passes through the connection between the force-applying surface and the main body. The force-applying arm is connected to the outer side of the main body.

[0006] Furthermore, the distance between the intersection of the extension line of the arc support surface and the extension line of the force application surface and the shortest distance projection point of the end of the arc support surface on the extension line of the force application surface is substantially the same as the length of the force application surface.

[0007] Furthermore, the thickness of the main body is substantially the same as the arc length of the arc supporting surface.

[0008] Furthermore, the invention also includes a disassembly and assembly striking portion, which is connected to the outer side of the main body away from the inner arc surface and is arranged between the force arm and the hook claw.

[0009] Furthermore, the invention also includes a load-removing knocking part, which is connected to the outer side of the main body away from the inner arc surface and is arranged between the force arm and the transfer part.

[0010] Furthermore, the device further includes a striking portion. This striking portion is a boss formed by protruding outward from the outer side of the main body away from its inner curved surface. The side of the striking portion closer to the hook is the assembly and disassembly striking portion, and the side closer to the transfer portion is the unloading striking portion. One end of the force-applying arm is connected to the outer side of the striking portion away from the main body and is disposed between the assembly and disassembly striking portion and the unloading striking portion.

[0011] Furthermore, the knocking portion is a rectangular boss. The two end faces of the main body are parallel to each other. The knocking surfaces of the disassembly knocking portion and the unloading knocking portion are perpendicular to the end faces of the main body.

[0012] Furthermore, the knocking part is centrally arranged on the outer side of the main body away from the inner arc surface thereof. One end of the force applying arm is connected to the middle of the side of the knocking part away from the main body.

[0013] Furthermore, a screw hole is provided in the middle of the side of the knocking part away from the main body, and one end of the force applying arm is provided with a thread matching the screw hole.

[0014] Compared with the prior art, the beneficial effect of the technical solution of the present invention is that the tooling is not prone to slipping when using a larger locking nut. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments:

[0016] Figure 1 It is a three-dimensional schematic diagram of the existing tooling;

[0017] Figure 2 for Figure 1 The schematic plan view of the tooling shown is in the state of disassembling and assembling round nuts;

[0018] Figure 3 A projection view of a jig for a CNC machine tool according to a specific embodiment of the present invention;

[0019] Figure 4 for Figure 3 One of the three-dimensional schematic diagrams of a jig for a CNC machine tool is shown;

[0020] Figure 5 for Figure 3A three-dimensional schematic diagram of a fixture for a CNC machine tool in a state of locking a round nut is shown;

[0021] Figure 6 for Figure 3 The second three-dimensional schematic diagram of the fixture for CNC machine tools is shown.

[0022] The figure includes: a main body 1, an inner arc surface 11, a force-applying arm 2, a hook 3, a force-applying surface 31, a transfer part 4, an arc support surface 41, a knocking part 5, a disassembly knocking part 51, and a unloading knocking part 52. DETAILED DESCRIPTION

[0023] like Figure 3 As shown, the jig for a CNC machine tool disclosed in this embodiment can be divided into the following five parts: a main body 1, a force-applying arm 2, a hook 3, a transfer portion 4, and a striking portion 5. The projection of the main body 1 is approximately crescent-shaped. The crescent-shaped inner arc surface 11 of the main body 1 extends at a constant curvature toward its ends.

[0024] The hook 3 extends from one end of the main body 1 toward the center of the crescent-shaped inner curved surface 11. The side where the hook 3 meets the inner curved surface 11 of the main body 1 is a flat surface, connected to the inner curved surface 11 via a transitional curved surface. This flat surface serves as a torsional force application surface 31 that acts on the locking member during operation. This force application surface 31 is substantially perpendicular to the inner curved surface 11. The length of this flat surface is the distance from its connection with the inner curved surface 11 to the end of its extension toward the center of the inner curved surface 11.

[0025] The transfer portion 4 is formed by extending from the other end of the main body 1 toward the extension line of the force-applying surface 31. The transfer portion 4 is convex toward the center of the crescent-shaped inner arc surface 11 on the side corresponding to the hook 3. The side is a circular arc support surface 41 for cooperating with the outer surface of the large-diameter locking member. The circular arc support surface 41 is a constant curvature arc surface. The radius of the circular arc support surface 41 is equal to the shortest distance from its center to the normal line at the connection between the force-applying surface 31 and the inner arc surface 11. The circular arc support surface 41 of the transfer portion 4 is substantially parallel to the inner arc surface 11, and the extension line of the support surface 41 passes through the connection between the force-applying surface 11 and the main body 1.

[0026] In actual operation, the locking member is generally installed manually first, and when manual force is no longer sufficient, the locking member is finally tightened. In this embodiment, the transfer portion 4 of the fixture is designed to be as long as possible to better support the locking member and expand the range of locking member diameters that the fixture can accommodate. However, lengthening the arcuate support surface 4 reduces the distance between the arcuate support surface 4 and the distal end of the hook 3, causing inconvenience in the engagement of the fixture with the locking member during actual operation.

[0027] In this embodiment, in order to facilitate the engagement of the tool with the locking member and to optimize the arc length of the support surface 41, the distance between the intersection of the extended line of the arc support surface 41 and the extended line of the force-applying surface 31 and the shortest projection point of the end of the arc support surface 41 on the extended line of the force-applying surface 31 should be substantially the same as the length of the force-applying surface 31.

[0028] The striking portion 5 is a protruding platform formed on the outer side of the main body 1, facing away from the inner curved surface 11. It is centrally located on the main body 1 and its projection is rectangular. The length of the striking portion 5 is parallel to the line connecting the two ends of the main body 1 and is shorter than the length of the line connecting the two ends of the main body 1.

[0029] The force-applying arm 2 is a round rod, one end of which is connected to the middle of the side surface of the striking portion 5 away from the main body 1 , and the other end of which extends in a direction away from the main body 1 .

[0030] The two side surfaces in the width direction of the knocking part 5 are connected to the outer side of the main body 1 away from its inner arc surface 11 through a circular arc, and the two circular arcs continue to extend outward away from one end of the knocking part 5 to form a protrusion, which is used to strengthen the strength of the two arms of the main body 1.

[0031] like Figure 3 and Figure 4 As shown, the thickness of the main body 1 is substantially the same as the arc length of the arc support surface 4, and the two end faces of the main body 1 are parallel to each other. The hook claw 3 and the transfer part 4 are special-shaped columns, and the height direction is parallel to the thickness direction of the main body 1, and the height is equal to the thickness of the main body 1. The knocking part 5 is a column with a rectangular cross-section, and its height direction is parallel to the thickness direction of the main body 1, and the height is equal to the thickness of the main body 1. It is arranged in the middle of the outer side of the main body 1 away from its inner arc surface 11. The knocking surfaces of the disassembly knocking part 51 and the unloading knocking part 52 on the knocking part 5 are perpendicular to the end face of the main body 1. The force arm 2 is arranged in the middle of the side of the knocking part 5 away from the main body 1. The two opposite side faces of the above-mentioned two protrusions are perpendicular to the end face of the main body 1. In this embodiment, the hook claw 3, the transfer part 4, the knocking part 5 and the main body 1 are integrally formed.

[0032] like Figure 5 As shown, the striking parts 5 are symmetrically arranged at the two outer corners of the force-applying arm 2, forming the striking force-bearing parts. The one closest to the hook 3 is the assembly and disassembly striking part 51, and the one closest to the transfer member 4 is the unloading striking part 52. During operation, the assembly and disassembly striking part 51 can be struck with a hard object to better tighten or remove the locking member. After the actual operation is completed, the fixture is often difficult to separate from the locking member due to the preload force. However, by striking the unloading striking part 52 with a hard object, the fixture and the locking member can be easily separated.

[0033] like Figure 6As shown, a threaded hole is provided in the middle of the side of the striking portion 5 facing away from the main body 1, and a thread corresponding to the threaded hole is provided on one end of the force-applying arm 2. In this embodiment, the force-applying arm 2 of the tool is detachable. It can be adapted to various tooling heads. The tooling head comprises the tooling body 1, the hook 3, the transfer portion 4, and the striking portion 5.

[0034] The above content is only a preferred embodiment of the present application and is not intended to limit the implementation scheme of the present application. Ordinary technicians in this field can easily make corresponding changes or modifications based on the main concept and spirit of the present application. Therefore, the scope of protection of the present application shall be based on the scope of protection required by the claims.

Claims

1. A fixture for a CNC machine tool, characterized in that: include: A main body (1), a force-applying arm (2), a hook (3), a transfer portion (4), and a striking portion (5); The projection of the main body (1) is approximately crescent-shaped; The force-applying arm (2) is connected to the outer side of the main body (1); The hook (3) is formed by extending one end of the main body (1) toward the center of the crescent-shaped inner arc surface (11), and the force-applying surface (31) of the hook (3) is substantially perpendicular to the crescent-shaped inner arc surface (11); The transfer portion (4) is formed by extending the other end of the main body (1) toward the extension line of the force-applying surface (31); the transfer portion (4) is convex toward the center of the crescent-shaped inner arc surface (11) corresponding to the side surface of the hook (3); the side surface is a circular arc support surface (41) for cooperating with the outer surface of the locking member; the circular arc support surface (41) is substantially parallel to the crescent-shaped inner arc surface (11), and the extension line of the circular arc support surface (41) passes through the connection between the force-applying surface (31) and the main body (1); the radius of the circular arc support surface (41) is equal to the length of the shortest distance from its center to the normal line of the connection between the force-applying surface (31) and the inner arc surface (11); The knocking portion (5) is a boss formed by protruding outward from the outer side of the main body (1) away from the inner arc surface (11); the length direction of the knocking portion (5) is parallel to the line connecting the two ends of the main body (1), and the length is less than the length of the line connecting the two ends of the main body (1); The distance between the intersection of the extension line of the arc support surface (41) and the extension line of the force-applying surface (31) and the shortest distance projection point of the end of the arc support surface (41) on the extension line of the force-applying surface (31) is substantially the same as the length of the force-applying surface (31).

2. The fixture for a CNC machine tool according to claim 1, wherein: The thickness of the main body (1) is substantially the same as the arc length of the circular arc supporting surface (41).

3. The jig for a CNC machine tool according to claim 2, wherein: It also includes a disassembly and assembly knocking part (51); the disassembly and assembly knocking part (51) is connected to the outer side of the main body (1) away from the inner arc surface (11) thereof, and is arranged between the force applying arm (2) and the hook claw (3).

4. The fixture for a CNC machine tool according to claim 3, wherein: Also includes a load-removing knocking portion (52); The unloading knocking portion (52) is connected to the outer side of the main body (1) away from the inner arc surface (11) thereof and is arranged between the force applying arm (2) and the transfer portion (4).

5. The jig for a CNC machine tool according to claim 4, wherein: The side of the knocking part (5) close to the hook (3) is the disassembly knocking part (51), and the side close to the transfer part (4) is the unloading knocking part (52); One end of the force-applying arm (2) is connected to the outer side of the knocking part (5) away from the main body (1), and is arranged between the disassembly knocking part (51) and the unloading knocking part (52).

6. The jig for a CNC machine tool according to claim 5, wherein: The knocking portion (5) is a rectangular boss; The two end surfaces of the main body (1) are parallel to each other; The knocking surfaces of the disassembly knocking part (51) and the unloading knocking part (52) are perpendicular to the end surface of the main body (1).

7. The jig for a CNC machine tool according to any one of claims 1 to 6, wherein: The striking portion (5) is centrally arranged on the outer side of the main body (1) away from the inner arc surface (11); One end of the force-applying arm (2) is connected to the middle portion of the striking portion (5) on a side away from the main body (1).

8. The jig for a CNC machine tool according to claim 7, wherein: A screw hole is provided in the middle of the knocking portion (5) on a side away from the main body (1), and a thread matching the screw hole is provided at one end of the force applying arm (2).

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