Elastic clamping jaw

Abstract

The invention provides an elastic clamping jaw which is of an annular structure, a center hole is formed in the middle of the elastic clamping jaw, the center hole is provided with a center shaft and comprises a plurality of inner side walls, a plurality of outer side walls, a plurality of connecting walls, a plurality of first gaps and a plurality of second gaps, and the inner side walls are distributed around the center shaft of the outer side walls at intervals; the outer side wall and the inner side wall are staggered in the direction perpendicular to the center shaft. Two ends of the connecting wall are respectively connected with the inner side wall and the outer side wall; the first gap is defined by two adjacent connecting walls and one outer side wall, and the opening of the first gap faces the central shaft; the second gap is defined by two adjacent connecting walls and one inner side wall, and the second gap is far away from the opening of the central shaft. The space in the direction perpendicular to the center shaft is fully utilized, superposition of the elastic clamping jaws in the axial space is reduced, the thickness of the elastic clamping jaws is reduced, and the miniaturization design requirement is met.

Description

Technical Field

[0001] The invention relates to the technical field of clamps, in particular to an elastic clamping claw. Background Art

[0002] In modern manufacturing, the workpieces need to be machined by cutting, grinding, and other processes. Regardless of the form of operation, the workpieces need to be installed and fixed. In common injection molding or compression molding industrial manufacturing, the mold core needs to be further processed, and the mold core is mainly fixed by gluing or elastic clamps. The elastic clamp is an annular structure with a through hole in the middle along its axial direction. The through hole is used to place the mold core or other workpieces. When the elastic clamp is subjected to force, its side wall deforms and squeezes the mold core or other workpieces, thereby clamping the mold core or other workpieces in the through hole. However, due to structural design reasons, the existing elastic clamp cannot be further reduced in its axial height, which in turn makes it impossible to reduce the height of the processing jig, and cannot meet the mold core processing scenarios in smaller spaces.

[0003] At present, the elastic clamps are basically of the ER series, which are standard parts in the industry. At the same time, a spring collet is disclosed in the public patent document CN204019171U, and a plurality of front gaps and a plurality of rear gaps are provided on the side wall of the spring collet. Since the spring collet is an integral structural part, the front gap and the rear gap do not completely penetrate the side wall of the spring collet in the axial direction, and a connecting structure chuck and an extension are provided at the upper and lower ends of the spring collet, that is, the sleeves on both sides of the front gap are connected by the extension, and the sleeves on both sides of the rear gap are connected by the chuck. Due to the existence of the chuck and the extension, and in order to ensure that the sleeve can be better deformed, the spring collet cannot be reduced in the axial direction.

[0004] Therefore, it is necessary to design a new type of elastic clamp to meet the requirements of miniaturization processing. Summary of the invention

[0005] In view of the above problems, the object of the present invention is to provide an elastic clamping claw with a small thickness to meet the requirements of miniaturization processing.

[0006] To achieve the above object, the technical solution adopted by the present invention is:

[0007] The present invention provides an elastic clamping jaw, which is an annular structure, wherein a central hole is provided at the middle of the elastic clamping jaw, and the central hole has a central axis, and comprises:

[0008] A plurality of inner side walls, the plurality of inner side walls are spaced apart around the central axis and form the central hole around the central axis;

[0009] A plurality of outer side walls are arranged on a side of the inner side wall away from the central axis, the plurality of outer side walls are spaced apart around the central axis, and the outer side walls and the inner side walls are staggered with each other in a direction perpendicular to the central axis;

[0010] A plurality of connecting walls, wherein the plurality of connecting walls are spaced apart and distributed around the central axis, and two ends of the connecting walls are respectively connected to the inner wall and the outer wall;

[0011] A plurality of first gaps, wherein the first gaps are formed by two adjacent connecting walls and one outer side wall, and the first gaps are open toward the central axis;

[0012] A plurality of second gaps are provided, wherein the second gaps are formed by two adjacent connecting walls and one inner wall, and the second gaps are open away from the central axis.

[0013] Further preferably, the width of the first gap is 0.1 mm to 0.4 mm.

[0014] Further preferably, the width of the second gap is 0.05 mm to 0.2 mm.

[0015] Further preferably, both the first gap and the second gap penetrate the elastic clamping claw in the direction of the central axis.

[0016] Further preferably, a surface of the outer side wall away from the central axis is provided with a first inclined surface and a second inclined surface, and the first inclined surface and the second inclined surface are provided at an angle.

[0017] Further preferably, the outer diameter of the connection between the first inclined surface and the second inclined surface is the largest.

[0018] Further preferably, the axial thickness of the elastic clamp is 4 mm to 6 mm.

[0019] Further preferably, the included angle between the first inclined surface and the central axis is 20° to 40°.

[0020] Further preferably, the included angle between the second inclined surface and the central axis is 5° to 15°.

[0021] Further preferably, the elastic clamping claw is made of spring steel.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] The present invention forms multiple first gaps and multiple second gaps through multiple inner side walls, multiple outer side walls and multiple connecting walls. The inner side walls can be compressed on the first gaps, and the outer side walls can be compressed on the second gaps, thereby compressing the elastic clamps and squeezing and fixing the mold core. At the same time, the inner side walls and the outer side walls are arranged in a staggered manner in the direction perpendicular to the central axis, making full use of the space in the direction perpendicular to the central axis, reducing the superposition of the elastic clamps in the axial space, reducing the thickness of the elastic clamps, and meeting the requirements of miniaturization design. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0025] Figure 1 It is a structural schematic diagram of the present invention;

[0026] Figure 2 A top view of the present invention;

[0027] Figure 3 for Figure 2 AA cross section in;

[0028] Illustration description: OO-central axis, 1-inner wall, 2-outer wall, 3-connecting wall, 4-first gap, 5-second gap, 6-first inclined surface, 7-second inclined surface.

[0029] The following specific implementation manner will further illustrate the present invention in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION

[0030] In order to better understand the present invention, a more detailed description of various aspects of the present invention will be made with reference to the accompanying drawings. It should be understood that these detailed descriptions are only descriptions of embodiments of the present invention, and are not intended to limit the scope of the present invention in any way. Throughout the specification, the same reference numerals refer to the same elements. The expression "and / or" includes any and all combinations of one or more of the associated listed items.

[0031] Those skilled in the art should understand that, in the disclosure of the present invention, the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, the above terms should not be understood as limiting the present invention.

[0032] It should also be understood that the terms "comprises", "including", "having", "includes" and / or "comprising", when used in this specification, indicate the presence of the stated features, elements and / or components, but do not exclude the presence or addition of one or more other features, elements, components and / or combinations thereof. In addition, when expressions such as "at least one of..." appear after a list of listed features, they modify the entire listed features rather than modifying the individual elements in the list. In addition, when describing embodiments of the present invention, "may" is used to mean "one or more embodiments of the present invention". And, the term "exemplary" is intended to refer to an example or illustration.

[0033] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by those skilled in the art to which the present invention belongs. It should also be understood that terms (such as those defined in commonly used dictionaries) should be interpreted as having a meaning consistent with their meaning in the context of the relevant technology, and will not be interpreted in an idealized or overly formal sense unless explicitly defined in this article.

[0034] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0035] The present invention provides an elastic clamping claw, which is an annular structure, and a central hole is opened in the middle of the elastic clamping claw, and the central hole has a central axis OO, including:

[0036] A plurality of inner side walls 1, wherein the plurality of inner side walls 1 are spaced apart around the central axis OO and form a central hole around the central axis OO;

[0037] A plurality of outer walls 2 are arranged on a side of the inner wall 1 away from the central axis OO, the plurality of outer walls 2 are spaced apart around the central axis OO, and the outer walls 2 and the inner wall 1 are staggered with each other in a direction perpendicular to the central axis OO;

[0038] A plurality of connecting walls 3, the plurality of connecting walls 3 are spaced apart around the central axis OO, and the two ends of the connecting walls 3 are respectively connected to the inner wall 1 and the outer wall 2;

[0039] A plurality of first gaps 4, wherein the first gaps 4 are formed by two adjacent connecting walls 3 and an outer side wall 2, and the first gaps 4 are open toward the central axis OO;

[0040] A plurality of second gaps 5 are formed by two adjacent connecting walls 3 and an inner wall 1, and the second gaps 5 are open away from the central axis OO. It can be understood that the first gaps 4 and the second gaps 5 open in opposite directions.

[0041] The present invention forms a plurality of first gaps 4 and a plurality of second gaps 5 through a plurality of inner side walls 1, a plurality of outer side walls 2 and a plurality of connecting walls 3. The inner side wall 1 can be compressed on the first gap 4, and the outer side wall 2 can be compressed on the second gap 5, thereby compressing the elastic clamp and squeezing and fixing the mold core. It should be noted that the center hole is used to install and place the mold core (the workpiece to be processed). The inner side wall 1 and the outer side wall 2 are arranged in a staggered and spaced manner in the direction perpendicular to the central axis OO (radial direction), making full use of the space in the direction perpendicular to the central axis OO, reducing the superposition of the elastic clamp in the axial space, reducing the thickness of the elastic clamp, and meeting the requirements of miniaturization design. Compared with the prior art, the connection structure of the inner side wall 1 or the outer side wall 2 in the direction of the central axis OO is removed, and the connecting wall 3 is used to connect the inner side wall 1 and the outer side wall 2 in the direction perpendicular to the central axis OO, thereby reducing the thickness of the elastic clamp.

[0042] More specifically, the width of the first gap 4 is 0.1 mm to 0.4 mm, and the width of the second gap 5 is 0.05 mm to 0.2 mm, so that the connecting wall 3 has a sufficient deformation range to ensure that the elastic clamping claw squeezes the lens mold core, so that the elastic clamping claw can better deform and clamp the mold core.

[0043] The first gap 4 and the second gap 5 both penetrate the elastic clamping claw in the direction of the central axis OO, ensuring that the connecting wall 3 is better deformed in the direction around the central axis OO, so that the elastic clamping claw can better deform and clamp the mold core.

[0044] In order to further clamp the mold core, the surface of the outer wall 2 away from the central axis OO is provided with a first inclined surface 6 and a second inclined surface 7, and the first inclined surface 6 and the second inclined surface 7 are provided at an angle. By providing the first inclined surface 6 and the second inclined surface 7 at an angle on the outer wall 2, it is convenient to provide external extrusion force to act on the elastic clamping jaws, ensuring that the elastic clamping jaws can better clamp the mold core. The outer diameter of the connection between the first inclined surface 6 and the second inclined surface 7 is the largest. It can be understood that the diameter of the connection is the maximum diameter of the elastic clamping jaw, so that the external force acts on the elastic clamping jaws.

[0045] More specifically, the axial thickness of the elastic clamp is 4 mm to 6 mm, so that the elastic clamp can clamp an ultra-short mold core and meet the requirements of miniaturization design.

[0046] The angle between the first bevel 6 and the central axis OO is 20° to 40°, and the optimal value is 30°, which is convenient for processing the first bevel 6 and better providing squeezing force to the elastic clamp from top to bottom along the central axis OO. The angle between the second bevel 7 and the central axis OO is 5° to 15°, and the optimal value is 10°, which is convenient for processing the second bevel 7 and better providing squeezing force to the elastic clamp from bottom to top along the central axis OO. In addition, the elastic clamp is arranged on a fixture or a machine, and the angle between the second bevel 7 and the central axis OO is smaller than the angle between the first bevel 6 and the central axis OO, ensuring that the contact area between the lower end of the elastic clamp and the fixture or the machine is larger, which is convenient for better assembly of the elastic clamp.

[0047] In the present invention, the elastic clamp can be made of spring steel, which is a special alloy steel for manufacturing various springs and other elastic elements. Spring steel has excellent metallurgical quality (high purity and uniformity), good surface quality (strictly controlling surface defects and decarburization), and precise shape and size.

[0048] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. An elastic clamping jaw, which is a ring-shaped structure, has a center hole in the middle of the elastic clamping jaw, and the center hole has a center axis, characterized in that: include: A plurality of inner side walls (1), wherein the plurality of inner side walls (1) are spaced apart and distributed around the central axis, and the central hole is formed around the central axis; A plurality of outer side walls (2) are arranged on a side of the inner side wall (1) away from the central axis, the plurality of outer side walls (2) are spaced apart around the central axis, and the outer side walls (2) and the inner side wall (1) are offset from each other in a direction perpendicular to the central axis; A plurality of connecting walls (3), wherein the plurality of connecting walls (3) are spaced apart and distributed around the central axis, and two ends of the connecting walls (3) are respectively connected to the inner wall (1) and the outer wall (2); a plurality of first gaps (4), wherein the first gaps (4) are formed by enclosing two adjacent connecting walls (3) and one outer side wall (2), and the first gaps (4) are open toward the central axis; A plurality of second gaps (5), wherein the second gaps (5) are formed by enclosing two adjacent connecting walls (3) and one inner wall (1), and the second gaps (5) are open away from the central axis.

2. The elastic clamp according to claim 1, characterized in that: The width of the first gap (4) is 0.1 mm to 0.4 mm.

3. The elastic clamp according to claim 1, characterized in that: The width of the second gap (5) is 0.05 mm to 0.2 mm.

4. The elastic clamp according to claim 1, characterized in that: The first gap (4) and the second gap (5) both penetrate the elastic clamping claw in the direction of the central axis.

5. The elastic clamp according to claim 1, characterized in that: A first inclined surface (6) and a second inclined surface (7) are provided on the surface of the outer side wall (2) away from the central axis, and the first inclined surface (6) and the second inclined surface (7) are arranged at an angle.

6. The elastic clamp according to claim 5, characterized in that: The outer diameter of the connection between the first inclined surface (6) and the second inclined surface (7) is the largest.

7. The elastic clamp according to claim 1, characterized in that: The axial thickness of the elastic clamp is 4 mm to 6 mm.

8. The elastic clamp according to claim 5, characterized in that: The included angle between the first inclined surface (6) and the central axis is 20° to 40°.

9. The elastic clamp according to claim 5, characterized in that: The included angle between the second inclined surface (7) and the central axis is 5° to 15°.

10. The elastic clamp according to claim 1, characterized in that: The elastic clamping claw is made of spring steel.

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