Contracting clamping mechanism based on CNC

Abstract

The utility model discloses a CNC-based indentation clamping mechanism which comprises a mounting base, a linear driving element, an elastic clamping sleeve and a positioning plate, the linear driving element and the elastic clamping sleeve are both mounted in the mounting base, the output end of the linear driving element is connected with an ejector rod, and a conical groove is formed in the center of the ejector rod; a plurality of elastic chucks which are evenly distributed in the circumferential direction at equal intervals are arranged on the upper portion of the elastic clamping sleeve, the tops of the elastic chucks extend in the forward direction and are in clearance fit with one another to form an inward shrinkage space suitable for containing a product center column, and the tops of the elastic chucks extend into a clamping sleeve cavity of the elastic clamping sleeve in the reverse direction. A gap is kept between the conical column and the bottom of the conical groove, the positioning plate is installed on the top of the installation base, a protruding part is arranged at the position, right opposite to the ejector rod, of the positioning plate, a guide hole is formed in the center of the protruding part, a positioning cavity matched with the elastic clamping sleeve is formed in the inner surface of the positioning plate, and the elastic clamping sleeve is arranged in the positioning cavity. Therefore, a product can be clamped and fixed at the upper part of the elastic clamping sleeve through upward movement of the ejector rod.

Description

Technical Field

[0001] The utility model relates to the technical field of CNC processing equipment, in particular to a CNC-based retractable clamping mechanism. Background Art

[0002] Traditional spring retractable chucks usually have an inverted tapered surface machined on the chuck surface, and the tapered surface is squeezed by pulling the chuck down to achieve retractable clamping. This type of spring retractable chuck has the simplest structure and is widely used in various tool chucks.

[0003] In CNC machining, the product must always be kept in a fixed coordinate system to ensure good stability of the processed size and ensure machining quality. The chuck on the traditional spring retractable structure has the risk of instability and cannot meet this requirement and is directly used in CNC machining. Utility Model Content

[0004] One advantage of the present invention is that it provides a CNC-based retractable clamping mechanism, in which an elastic chuck is directly used as a fixed end, and cooperates with the tapered groove on the internal tapered column and the push rod. When the linear drive element drives the push rod to rise and squeeze the tapered column inward, multiple elastic chucks are squeezed and retracted at the same time to clamp the center column of the product to effectively fix the product, thereby solving the problem of unstable and easy shaking of the chuck, so that it can be used in CNC processing, and the processing efficiency can be ensured on the basis of ensuring the processing quality.

[0005] One advantage of the utility model is that it provides a CNC-based retractable clamping mechanism, wherein the mounting seat includes a base and a pad, and the linear drive element is installed in the base, and the elastic sleeve is located in the pad, which can facilitate the assembly and subsequent maintenance of the retractable clamping mechanism.

[0006] One advantage of the utility model is that it provides a CNC-based retractable clamping mechanism, in which the elastic sleeve is symmetrically provided with margin grooves at the bottom of adjacent elastic clamps, which can increase the elasticity of the elastic sleeve within a certain range and facilitate the placement and removal of products.

[0007] In order to achieve at least one of the above advantages of the utility model, the utility model provides a CNC-based retractable clamping mechanism, including a mounting seat, a linear drive element, an elastic sleeve and a positioning plate, wherein the linear drive element and the elastic sleeve are both installed in the mounting seat, the output end of the top of the linear drive element is coaxially connected with a push rod, the top of the push rod is provided with a conical groove at the center position, wherein the upper part of the elastic sleeve is provided with a plurality of elastic chucks uniformly distributed with equal gaps along the circumferential direction, the tops of the plurality of elastic chucks extend forward, and the gaps are matched with each other to form a suitable for accommodating The elastic chuck is arranged in the retracted space of the center column of the product, and the top of the elastic chuck extends in the opposite direction to the jacket cavity of the elastic jacket, and the gap is matched with each other to form a conical column adapted to the conical groove, and a gap is maintained between the bottom end of the conical column and the bottom of the conical groove, wherein the positioning plate is installed on the top of the mounting seat, and a raised portion for positioning the product is provided opposite to the push rod, and a guide hole is provided vertically through the center of the raised portion for the center column of the product to pass through, and a positioning cavity is provided on the inner surface of the positioning plate to match the elastic jacket.

[0008] According to an embodiment of the utility model, the linear drive element is implemented as a cylinder, and the piston rod of the cylinder is coaxially connected to the push rod.

[0009] According to an embodiment of the present invention, the number of the elastic clamps is three or four.

[0010] According to one embodiment of the utility model, the mounting seat includes a base and a pad, wherein the pad is installed on the top of the base, the positioning plate is installed on the top of the pad, wherein the linear drive element is installed in the base, and the elastic sleeve is fixedly connected to the top of the base, passes through the pad and protrudes into the positioning plate, cooperating with the positioning cavity.

[0011] According to one embodiment of the utility model, a circular fixing portion and a circular matching portion coaxially connected to the bottom of the circular fixing portion are provided at the lower portion of the elastic sleeve, the outer diameter of the circular matching portion is smaller than the outer diameter of the circular fixing portion, the circular fixing portion is evenly provided with mounting holes for connecting to the base along the circumferential direction, and a positioning hole matching with the circular matching portion is provided at the top of the base.

[0012] According to an embodiment of the utility model, the elastic sleeve is symmetrically provided with margin grooves at the bottom of the adjacent elastic clamp.

[0013] These and other purposes, features and advantages of the present invention are fully reflected in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1A schematic structural diagram of a CNC-based retractable clamping mechanism according to a preferred embodiment of the present application is shown.

[0015] Figure 2 A cross-sectional structural diagram of a CNC-based retractable clamping mechanism according to a preferred embodiment of the present application is shown.

[0016] Figure 3 A schematic structural diagram of the elastic jacket in the present application is shown.

[0017] Figure 4 A bottom view of the structure of the elastic jacket in the present application is shown.

[0018] Figure 5 A schematic structural diagram of the positioning plate in the present application is shown. DETAILED DESCRIPTION

[0019] The following description is used to disclose the utility model so that those skilled in the art can implement the utility model. The preferred embodiments described below are only examples, and those skilled in the art can think of other obvious variations. The basic principles of the utility model defined in the following description can be applied to other embodiments, variations, improvements, equivalents, and other technical solutions that do not deviate from the spirit and scope of the utility model.

[0020] Those skilled in the art should understand that, in the disclosure of the specification, the orientation or position relationship indicated by the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. 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 operated in a specific orientation. Therefore, the above terms should not be understood as limiting the present invention.

[0021] It is to be understood that the term "one" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element may be one, while in another embodiment, the number of the element may be multiple, and the term "one" should not be understood as a limitation on the quantity.

[0022] refer to Figures 1 to 5According to a preferred embodiment of the utility model, a CNC-based retracting clamping mechanism will be described in detail below, wherein the CNC-based retracting clamping mechanism includes a mounting seat 10, a linear drive element 20, an elastic sleeve 30 and a positioning plate 40, wherein the linear drive element 20 and the elastic sleeve 30 are both installed in the mounting seat 10, and the output end of the top of the linear drive element 20 is coaxially connected with a push rod 21, and the top of the push rod 21 is provided with a conical groove 201 at the center position, wherein the upper part of the elastic sleeve 30 is provided with a plurality of elastic chucks 31 uniformly distributed with equal gaps along the circumferential direction, and the tops of the plurality of elastic chucks 31 extend forward and are mutually The clearance fit forms a retracted space 301 suitable for accommodating the central column 51 of the product 50, and the top of the elastic clamp 31 extends in the opposite direction to the jacket cavity 302 of the elastic jacket 30, and the clearance fits with each other to form a conical column 311 adapted to the conical groove 201, wherein the gap in the conical column 311 can be equal to the gap at the retracted space 301, and can also be unequal to the gap at the retracted space 301, as long as the conical column 311 can clamp and fix the central column 51 of the product 50 through the retracted space 301 when it shrinks. In addition, a gap is maintained between the bottom end of the conical column 311 and the bottom of the conical groove 201, forming a travel space for the push rod 21 to move up and down, so that the push rod 21 can move in the retracted space 301. When the push rod 21 moves upward, it can synchronously squeeze the conical columns 311 formed by the multiple elastic collets 31 to reduce the gaps between the elastic collets 31. In addition, the positioning plate 40 is installed on the top of the mounting seat 10, and is provided with a protrusion 41 for positioning the product 50 opposite to the push rod 21. At the same time, a guide hole 401 is vertically penetrated at the center of the protrusion 41 for the central column 51 of the product 50 to pass through, and a positioning cavity matched with the elastic jacket 30 is provided on the inner surface of the positioning plate 40, so that the elastic jacket 30 can be limited in the x-direction, y-direction and z-direction at the same time. In this way, when the linear drive element 20 drives the push rod 21 to When moving upward, since the positioning plate 40 limits the elastic sleeve 30 at the top, the conical groove 201 of the push rod 21 will gradually compress the conical column 311 inward, reducing the gap of the conical column 311, thereby directly and synchronously driving the retracted space 301 to gradually shrink, and finally clamping and fixing the center column 51 of the product 50, that is, firmly clamping and fixing the product 51. Since one end of the product 50 is fixed directly through the top of the elastic sleeve 30, rather than fixing it through the bottom of the elastic sleeve in conventional technology, the problem of unstable and easy shaking of the chuck can be effectively solved, so that the retracted clamping mechanism can be used in CNC processing, and the processing efficiency can be ensured on the basis of ensuring the processing quality.

[0023] In one embodiment, the linear drive element 20 is implemented as a cylinder, and a piston rod of the cylinder is coaxially connected to the push rod 21 .

[0024] In one embodiment, the number of the elastic clamps 31 is three or four, which mainly depends on the shape of the product.

[0025] In one embodiment, the mounting seat 10 includes a base 11 and a pad 12, wherein the pad 12 is installed on the top of the base 11, and the positioning plate 40 is installed on the top of the pad 12, wherein the linear drive element 20 is installed in the base 11, and the elastic sleeve 30 is fixedly connected to the top of the base 11, and passes through the pad 12 and protrudes into the positioning plate 40, cooperating with the positioning cavity, thereby facilitating the installation of the elastic sleeve 30 and the push rod 21 and subsequent repair and maintenance.

[0026] Further preferably, the lower part of the elastic sleeve 30 is provided with a circular fixing portion 32 and a circular matching portion 33 coaxially connected to the bottom of the circular fixing portion 32, and the outer diameter of the circular matching portion 33 is smaller than the outer diameter of the circular fixing portion 32, and the circular fixing portion 32 is evenly provided with mounting holes 303 for connecting to the base 11 along the circumferential direction, and the top of the base 11 is provided with a positioning hole 101 matching the circular matching portion 33, which not only facilitates the quick and accurate installation of the elastic sleeve 30, but also facilitates the fixation of the elastic sleeve 30.

[0027] Further preferably, the elastic jacket 30 is symmetrically provided with margin grooves 304 at the bottom of the adjacent elastic clamp 31 , which can not only increase the elasticity of the elastic jacket 30 to a certain extent, but also facilitate the quick placement and removal of products, saving more effort.

[0028] It should be understood by those skilled in the art that the embodiments of the present invention described above and shown in the accompanying drawings are only examples and do not limit the present invention. The advantages of the present invention have been fully and effectively realized. The functions and structural principles of the present invention have been demonstrated and explained in the embodiments, and the embodiments of the present invention may be deformed or modified in any way without departing from the principles.

Claims

1. CNC-based retractable clamping mechanism, characterized in that: The invention comprises a mounting seat, a linear drive element, an elastic sleeve and a positioning plate, wherein the linear drive element and the elastic sleeve are both mounted in the mounting seat, the output end at the top of the linear drive element is coaxially connected with a push rod, the top of the push rod is provided with a conical groove at the center position, wherein the upper part of the elastic sleeve is provided with a plurality of elastic chucks which are evenly distributed with equal gaps along the circumferential direction, the tops of the plurality of elastic chucks extend forwardly, and are clearance-matched with each other to form an inwardly contracted space suitable for accommodating the center column of the product, and the tops of the elastic chucks extend reversely into the jacket cavity of the elastic sleeve, and are clearance-matched with each other to form a conical column adapted to the conical groove, and a gap is maintained between the bottom end of the conical column and the groove bottom of the conical groove, wherein the positioning plate is mounted on the top of the mounting seat, and a protrusion for positioning the product is provided opposite to the push rod, the center of the protrusion is provided with a guide hole which penetrates vertically for the center column of the product to pass through, and the inner surface of the positioning plate is provided with a positioning cavity which matches the elastic sleeve.

2. The CNC-based retracting clamping mechanism according to claim 1, characterized in that: The linear drive element is implemented as a cylinder, and a piston rod of the cylinder is coaxially connected to the push rod.

3. The CNC-based retracting clamping mechanism according to claim 2, characterized in that: The number of the spring clips is three or four.

4. The CNC-based retractable clamping mechanism according to claim 1, characterized in that: The mounting seat includes a base and a pad, wherein the pad is installed on the top of the base, and the positioning plate is installed on the top of the pad, wherein the linear drive element is installed in the base, and the elastic sleeve is fixedly connected to the top of the base, passes through the pad and protrudes into the positioning plate, and cooperates with the positioning cavity.

5. The CNC-based retractable clamping mechanism according to claim 4, characterized in that: The lower part of the elastic sleeve is provided with a circular fixing part and a circular matching part coaxially connected to the bottom of the circular fixing part, the outer diameter of the circular matching part is smaller than the outer diameter of the circular fixing part, the circular fixing part is evenly provided with mounting holes for connecting to the base along the circumferential direction, and the top of the base is provided with a positioning hole matching with the circular matching part.

6. The CNC-based retractable clamping mechanism according to claim 5, characterized in that: The elastic sleeve is symmetrically provided with margin grooves at the bottom of the adjacent elastic clamps.

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