Special clamp for miniature slender shaft part

Abstract

The special clamp comprises a centering clamping seat, a centering clamp and a centering external rotation part, a main shaft connecting hole is formed in one end of the centering clamping seat and used for being connected with a machine tool main shaft, a centering clamp connecting threaded hole is formed in the other end of the centering clamping seat and used for being connected with the centering clamp, and centering external rotation connecting threads on the outer surface are used for being connected with the centering external rotation part; one end of the centering clamp is provided with external threads, and the other end of the centering clamp is provided with a kidney-shaped hole and a round hole used for clamping a miniature slender shaft workpiece. The centering external-rotation internal threads are used for being connected with the centering clamping base, and a conical hole is formed in the conical end and is the same as the outer conical surface of the centering clamping base in shape. The centering clamp is connected with the centering clamp seat through threads, shaft parts with different diameters can be clamped by replacing the centering clamps with different hole diameters, convenience and rapidness are achieved, and the clamping device is simple in structure, wide in application range, convenient to operate and suitable for clamping miniature slender shafts of various specifications.

Description

Technical Field

[0001] The invention relates to the technical field of clamps, and in particular to a special clamp for a micro slender shaft component. Background Art

[0002] Shaft parts are widely used in aerospace, medical electronics, automobile and other industries. With the development of science and technology, the use of micro shaft parts is becoming more and more widespread. At the same time, the process requirements for micro shaft parts are becoming more and more stringent. It is difficult for existing shaft parts fixtures to adapt to existing needs. On the one hand, it is difficult to adjust the clamping force of existing fixtures, which will cause parts to deform due to excessive clamping force. On the other hand, if the micro holes are not processed to fit the micro shafts, the parts will be damaged on the surface due to clamping, which will reduce the product qualification rate. Summary of the invention

[0003] The purpose of the present invention is to solve the technical problems existing in the prior art and to provide a special fixture for micro slender shaft parts.

[0004] To achieve the above-mentioned purpose, the technical solution provided by the present invention is: a special fixture for micro-slender shaft parts, including a centering clamp seat, a centering external rotation, and a centering clamp;

[0005] A main shaft connection hole is provided at one axial end of the centering clamp seat, a centering clamp connection threaded hole is provided at the other axial end of the centering clamp seat, and a centering external rotation connection thread is provided on the outer surface of the centering clamp seat;

[0006] One end of the centering clamp is provided with an external thread of the centering clamp, and the other end of the centering clamp is a cylindrical section connected to a conical surface;

[0007] One end of the centering external rotation is provided with a centering external rotation internal thread, and the other end of the centering external rotation is provided with a cone end that cooperates with the centering clamp;

[0008] The centering clamp external thread of the centering clamp is connected to the centering clamp connecting threaded hole of the centering clamp seat; the centering externally rotating internal thread of the centering externally rotating is connected to the centering externally rotating connecting thread of the centering clamp seat, and one end of the cylindrical section of the centering clamp connected to a conical surface is located inside the conical end.

[0009] Preferably, the centering clamp seat has a screw hole in the radial direction; the screw hole is connected to the main shaft connecting hole, and a keyway is arranged inside the main shaft connecting hole.

[0010] Preferably, there are waist holes and longitudinal waist holes on the axis of the centering clamp, and the waist holes and longitudinal waist holes are perpendicular to each other to form a cross shape. The cylindrical section of the centering clamp is connected to a conical surface, and a circular hole and a cross groove are arranged at the center of the end of the conical surface. The cross groove, waist hole and longitudinal waist hole divide the conical end of the centering clamp into four petals.

[0011] Beneficial effects of the present invention:

[0012] The patent of the present invention connects the centering clamp seat with the machine tool spindle; the centering clamp is connected to the centering clamp seat by means of threads, so that shaft parts of different diameters can be clamped by replacing centering clamps of different apertures, which is convenient and quick; the application scope of the present invention is greatly expanded, and the work efficiency is improved at the same time.

[0013] The centering external rotation is connected to the centering clamp seat by means of a thread, and clamping is achieved by means of a tapered hole which is the same shape as the tapered surface of the centering clamp. The clamping force can be controlled by adjusting the distance by which it is screwed into the centering clamp seat, thereby avoiding surface damage to the micro-axis components.

[0014] The patented device of the present invention has a simple structure, a wide range of applications, and is easy to operate, and is suitable for clamping micro-slender shafts of various specifications. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The drawings described herein are used to provide further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0016] Figure 1 This is an assembly diagram of a special fixture for a micro-slender shaft component in the present invention;

[0017] Figure 2 It is a cross-sectional view of the assembly in the present invention;

[0018] Figure 3 It is a schematic diagram of the centering clamp structure in the present invention;

[0019] Figure 4 This is a schematic diagram of the centering clamp structure in the present invention;

[0020] Figure 5 It is a schematic diagram of the centering external rotation structure in the present invention.

[0021] Figure annotation:

[0022] Centering clamp seat 1, spindle connecting hole 1a, screw hole 1b, centering clamp connecting threaded hole 1c, centering external rotation connecting thread 1d, keyway 1f, centering external rotation 2, centering external rotation internal thread 2a, tapered end 2b, centering clamp 3, waist hole 3a, round hole 3b, centering clamp external thread 3c, cross groove 3d, longitudinal waist hole 3f. DETAILED DESCRIPTION

[0023] This section will describe in detail the specific embodiments of the present invention. The preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present invention, but it cannot be understood as a limitation on the scope of protection of the present invention.

[0024] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., and orientations or positional relationships indicated are based on the orientations or positional relationships shown in the accompanying drawings, and 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 operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0025] In the description of the present invention, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood as not including the number itself, and "above", "below", "within" etc. are understood as including the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0026] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0027] Reference Figure 1-Figure 5 The present invention discloses a special fixture for micro-slender shaft parts, including a centering clamp seat 1, a centering clamp 3, and a centering external rotation 2; one end of the centering clamp seat 1 has a spindle connecting hole 1a for connecting to the machine tool spindle, and the other end has a centering clamp connecting threaded hole 1c for connecting to the centering clamp 3, and the outer surface centering external rotation connecting thread 1d is used to connect to the centering external rotation 2; one end of the centering clamp 3 has a centering clamp external thread 3c, and the other end has a waist hole 3a, a longitudinal waist hole 3f and a circular hole 3b, and the circular hole 3b and the cross groove 3d are used to clamp the workpiece; the centering external rotation internal thread 2a is used to connect to the centering clamp seat 1, and the tapered end 2b has a tapered hole inside which is the same shape as the outer tapered surface of the centering clamp 3.

[0028] Figure 3 This is a schematic diagram of the structure of the centering clamp 1. The left end of the centering clamp 1 is provided with a spindle connecting hole 1a, a threaded hole 1b is provided in the radial direction, a centering external rotating connecting external thread 1d is provided on the outer surface, and a centering clamp connecting threaded hole 1c is provided on the axis of the right end. There is a keyway 1f inside the spindle connecting hole 1a. The keyway 1f and the threaded hole 1b provide two machine tool spindle connection schemes, both of which can limit the circumferential movement of the centering clamp 1 on the spindle.

[0029] Figure 4 This is a schematic diagram of the structure of the centering clamp 3. The left end of the centering clamp 3 is provided with an external thread 3c, the right end is a cylinder connected to a conical surface, the right end is provided with a waist hole 3a and a longitudinal waist hole 3f, and a circular hole 3b and a cross groove 3d are provided at the center of the right end face of the centering clamp 3, which are used for positioning and clamping the micro shaft.

[0030] Specifically, the waist hole 3a, the longitudinal waist hole 3f, and the cross groove 3d divide the conical end of the centering clamp 3 into four petals. During the clamping process, the cross groove 3d gradually closes and merges. The four-petal structure can ensure that the workpiece clamping process is self-centering. The circular hole 3b is used to match the shape of the workpiece to prevent the circular cross-section workpiece from surface deformation due to clamping.

[0031] Figure 5 The schematic diagram of the structure of the centering external rotation 2 is a threaded hole 2a at the left end of the centering external rotation 2 and a tapered end 2b at the right end, wherein a tapered hole of the same shape as the tapered surface of the centering clamp 3 is arranged inside the centering external rotation 2. When in use, the clamping force is adjusted by adjusting the number of threads of the centering external rotation 2 screwed into the centering clamp seat 1 to ensure that the workpiece surface is not damaged while the workpiece is clamped.

[0032] Figure 2 It is an assembly sectional view of the patent of the present invention, in which the centering clamp seat 1, the centering external rotation 2, and the centering clamp 3 are coaxial; the centering clamp external thread 3c of the centering clamp 3 is screwed into the centering clamp connecting threaded hole 1c of the centering clamp seat 1 to fix the centering clamp; the centering external rotation internal thread 2a at the left end of the centering external rotation is screwed into the centering external rotation connecting thread 1d of the centering clamp seat to fix the centering external rotation 2, and the centering external rotation 2 moves to the left to tighten the centering clamp, and the clamping force is controlled by controlling the number of tightening turns; during the process of tightening the centering external rotation 2 to the left, the tapered end 2b at the right end squeezes the outer tapered surface of the centering clamp 3, so that the cross slot 3d is closed, and the micro shaft is clamped in the round hole 3b, and the waist hole 3a ensures that the cross slot 3d is closed in parallel when closed to avoid clamping the workpiece.

[0033] The patent of the present invention connects the centering clamp seat with the machine tool spindle; the centering clamp is connected to the centering clamp seat by means of threads, so that shaft parts of different diameters can be clamped by replacing centering clamps of different apertures, which is convenient and quick; the application scope of the present invention is greatly expanded, and the work efficiency is improved at the same time.

[0034] The centering external rotation is connected to the centering clamp seat by means of a thread, and clamping is achieved by means of a tapered hole which is the same shape as the tapered surface of the centering clamp. The clamping force can be controlled by adjusting the distance by which it is screwed into the centering clamp seat, thereby avoiding surface damage to the micro-axis components.

[0035] The patented device of the present invention has a simple structure, a wide range of applications, and is easy to operate, and is suitable for clamping micro-slender shafts of various specifications.

[0036] Under the premise that no conflict occurs, those skilled in the art may freely combine and superimpose the above-mentioned additional technical features.

[0037] The above description is only a preferred implementation mode of the present invention. Any technical solution that achieves the purpose of the present invention by substantially the same means belongs to the protection scope of the present invention.

Claims

1. A special fixture for micro-slender shaft parts, characterized by: It comprises a centering clamp seat (1), a centering external rotation (2), and a centering clamp (3); A main shaft connection hole (1a) is provided at one axial end of the centering clamp seat (1), a centering clamp connection threaded hole (1c) is provided at the other axial end of the centering clamp seat (1), and a centering externally rotating connection thread (1d) is provided on the outer surface of the centering clamp seat (1); One end of the centering clamp (3) is provided with a centering clamp external thread (3c), and the other end of the centering clamp (3) is a cylindrical section with a conical surface connected to the outside; One end of the centering external rotation (2) is provided with a centering external rotation internal thread (2a), and the other end of the centering external rotation (2) is provided with a cone end (2b) that cooperates with the centering clamp (3); The centering clamp external thread (3c) of the centering clamp (3) is connected to the centering clamp connecting threaded hole (1c) of the centering clamp seat (1); the centering externally rotating internal thread (2a) of the centering externally rotating (2) is connected to the centering externally rotating connecting thread (1d) of the centering clamp seat, and one end of the cylindrical section of the centering clamp (3) connected to a conical surface is located inside the conical end (2b).

2. A special fixture for micro-slender shaft parts according to claim 1, characterized in that: The centering clamp seat (1) is provided with a screw hole (1b) in the radial direction; the screw hole (1b) is communicated with the main shaft connecting hole (1a), and a keyway (1f) is arranged inside the main shaft connecting hole (1a).

3. A special fixture for micro-slender shaft parts according to claim 1, characterized in that: A waist hole (3a) and a longitudinal waist hole (3f) are provided on the axis of the centering clamp (3). The waist hole (3a) and the longitudinal waist hole (3f) are perpendicular to each other to form a cross shape. The cylindrical section of the centering clamp (3) is connected to a conical surface. A circular hole (3c) and a cross groove (3d) are arranged at the center of the end of the conical surface. The cross groove (3d), the waist hole (3a) and the longitudinal waist hole (3f) divide the conical end of the centering clamp (3) into four petals.

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