Fixture fixing mechanism of numerical control machine tool

Abstract

The utility model provides a fixture fixing mechanism of a numerical control machine tool, which comprises a base and a plurality of clamping plates, the plurality of clamping plates are oppositely arranged on the upper end face of the base, the plurality of clamping plates are connected with the base in a sliding manner, and buffer plates are nested outside the plurality of clamping plates. A plurality of elastic pieces are inserted between the buffer plate and the clamping plates in a penetrating mode, one ends of the elastic pieces are fixedly connected to the inner side wall of the buffer plate, the other ends of the elastic pieces are fixedly connected to the side walls of the clamping plates, and limiting parts for limiting the buffer plate are inserted into the clamping plates in a penetrating mode; through cooperation of the limiting component and the elastic piece, the situation that the clamping plate excessively extrudes the workpiece to cause damage to the workpiece in the process of clamping the workpiece can be avoided, meanwhile, the limiting component limits the buffer plate, unstable clamping caused by movement of the elastic piece in the process of machining the workpiece is avoided, and therefore the probability of producing defective products is reduced.

Description

Technical Field

[0001] This utility model relates to the field of CNC machine tool technology, and in particular to a clamping and fixing mechanism for a CNC machine tool. Background Technology

[0002] CNC machine tools are short for numerical control machine tools. They are automated machine tools equipped with a program control system. This control system can logically process programs with control codes or other symbolic instructions, decode them, represent them with coded numbers, input them to the CNC device through an information carrier, and after calculation and processing, the CNC device sends out various control signals to control the machine tool's movements, automatically machining parts according to the shape and size required by the drawings.

[0003] A clamping mechanism for a CNC machine tool is disclosed in patent publication number CN219403262U. The mechanism includes a base plate, a rotating assembly fixedly installed in the inner cavity of the base plate, and a clamping assembly fixedly installed in the inner cavity of a fixed column. Both sides of a first sliding rod are fixedly installed on the inner wall of the fixed column. A buffer assembly is fixedly installed on the top of each of the two fixed plates. The buffer assembly includes a housing, which is fixedly installed on the top of the fixed plate. Springs are fixedly installed in the inner cavities on opposite sides of the two housings. Stops are fixedly installed on opposite sides of the two springs. The opposite sides of the two stops are respectively fixedly connected to two clamping plates. When processing a workpiece, the two clamping plates clamp the workpiece. Simultaneously, the action of the two springs prevents wear on the workpiece during clamping. However, due to the elasticity of the springs, the clamping plates may become unstable during workpiece processing, causing deviations in the processing point and affecting processing accuracy, thus easily producing defective products.

[0004] Therefore, it is necessary to provide a new clamping and fixing mechanism for CNC machine tools to solve the above-mentioned technical problems. Utility Model Content

[0005] To solve the above-mentioned technical problems, this utility model provides a clamping and fixing mechanism for CNC machine tools.

[0006] The clamping mechanism for a CNC machine tool provided by this utility model includes: a base, and multiple clamping plates. The multiple clamping plates are arranged opposite to each other on the upper surface of the base, and the multiple clamping plates are slidably connected to the base. A buffer plate is nested outside each of the multiple clamping plates. Multiple elastic elements are inserted between the buffer plate and the clamping plates. One end of each elastic element is fixedly connected to the inner side wall of the buffer plate, and the other end of each elastic element is fixedly connected to the side wall of the clamping plate. A limiting component for limiting the position of the buffer plate is inserted inside each clamping plate.

[0007] Preferably, the limiting component includes a limiting rod, which is inserted into the clamping plate. One end of the limiting rod is fixedly connected to the inner side wall of the buffer plate, and the other end of the limiting rod passes through the side wall of the clamping plate. The side wall of the clamping plate is provided with a plurality of clamping components for clamping and limiting the limiting rod.

[0008] Preferably, the clamping assembly includes multiple guide rods, all of which are fixedly connected to the clamping plate. The multiple guide rods are divided into two groups and are arranged opposite to each other on both sides of the limiting rod. Movable plates are slidably connected to the outside of both groups of guide rods. A locking component is provided on the opposite side of the multiple movable plates. Springs II that drive the multiple movable plates to move relative to each other are nested outside the multiple guide rods. One end of the multiple springs II is fixedly connected to the outer wall of the movable plate, and the other end of the multiple springs II is fixedly connected to the clamping plate.

[0009] Preferably, the engaging component includes multiple engaging plates, which are fixedly connected to the side wall of one of the movable plates. The other movable plate has multiple slots that match the engaging plates. Each slot contains a limiting block, one end of which passes through the top wall of the slot. The top wall of the movable plate is fixedly connected to multiple limiting components that limit the limiting blocks.

[0010] Preferably, the limiting component includes a receiving plate, which is generally L-shaped. One end of the receiving plate is fixedly connected to the top wall of the movable plate, and a connecting rod is fixedly connected to the top wall of the receiving plate. One end of the connecting rod is inserted into the top wall of the movable plate, and a spring is nested outside the connecting rod. One end of the spring is fixedly connected to the top wall of the receiving plate, and the other end of the spring is fixedly connected to the top wall of the limiting block.

[0011] Preferably, the rod body of the limiting rod has multiple annular limiting grooves, and the multiple annular limiting grooves are arranged linearly along the rod body.

[0012] Preferably, the sidewall of the movable plate is provided with multiple arc-shaped limiting grooves, and the multiple arc-shaped limiting grooves and multiple annular limiting grooves are arranged alternately.

[0013] Compared with related technologies, the clamping and fixing mechanism for CNC machine tools provided by this utility model has the following advantages:

[0014] This utility model provides a clamping and fixing mechanism for CNC machine tools. In specific implementation, with the cooperation of limiting components and elastic elements, the workpiece can be prevented from being excessively squeezed during the clamping process, which would lead to workpiece damage. At the same time, the limiting components limit the buffer plate, preventing clamping instability caused by the movement of elastic elements during workpiece processing, thereby reducing the probability of producing defective products. Attached Figure Description

[0015] Figure 1A schematic diagram of the overall structure of the clamping and fixing mechanism for the CNC machine tool provided by this utility model;

[0016] Figure 2 Schematic cross-sectional structure of the clamping and fixing mechanism for the CNC machine tool provided by this utility model Figure 1 ;

[0017] Figure 3 This is a schematic cross-sectional view of the clamping and fixing mechanism for the CNC machine tool provided by this utility model. Figure 2 ;

[0018] Figure 4 This is a cross-sectional structural diagram of the clamping assembly of the fixture fixing mechanism for the CNC machine tool provided by this utility model.

[0019] The following components are labeled in the diagram: 1. Base; 11. Outer shell; 12. Rotating table; 13. Drive motor one; 14. Double-ended threaded rod; 15. Drive motor two; 2. Clamping plate; 3. Buffer plate; 4. Elastic element; 5. Limiting component; 51. Limiting rod; 6. Clamping assembly; 61. Guide rod; 62. Movable plate; 63. Spring two; 7. Engaging component; 71. Engaging plate; 72. Slot; 73. Limiting block; 8. Limiting component; 81. Receiving plate; 82. Connecting rod; 83. Spring three. Detailed Implementation

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0021] Please refer to the following: Figure 1 — Figure 4 ,in, Figure 1 A schematic diagram of the overall structure of the clamping and fixing mechanism for the CNC machine tool provided by this utility model; Figure 2 Schematic cross-sectional structure of the clamping and fixing mechanism for the CNC machine tool provided by this utility model Figure 1 ; Figure 3 This is a schematic cross-sectional view of the clamping and fixing mechanism for the CNC machine tool provided by this utility model. Figure 2 ; Figure 4 This is a cross-sectional structural diagram of the clamping assembly of the fixture fixing mechanism for the CNC machine tool provided by this utility model.

[0022] In practical implementation, a clamping and fixing mechanism for a CNC machine tool has the following structure: Figure 1 — Figure 4As shown, it includes: a base 1, and multiple clamping plates 2. The multiple clamping plates 2 are disposed opposite to each other on the upper surface of the base 1, and the multiple clamping plates 2 are slidably connected to the base 1. A buffer plate 3 is nested outside each of the multiple clamping plates 2. Multiple elastic elements 4 are inserted between the buffer plate 3 and the clamping plates 2. One end of the multiple elastic elements 4 is welded to the inner side wall of the buffer plate 3, and the other end of the multiple elastic elements 4 is welded to the side wall of the clamping plate 2. A limiting component 5 for limiting the buffer plate 3 is inserted inside each clamping plate 2.

[0023] It should be noted that the base 1 includes a housing 11 and a rotating platform 12. The rotating platform 12 is rotatably connected to the top wall of the housing 11. A drive motor 13 for driving the rotating platform 12 is bolted inside the housing 11. A double-threaded rod 14 is inserted inside the rotating platform 12. One end of the double-threaded rod 14 is rotatably connected to the inner wall of the rotating platform 12 through a bearing seat. A drive motor 15 is welded to the other end of the double-threaded rod 14. The outer wall of the double-threaded rod 14 has two sections of threads with opposite helical directions. Two clamping plates 2 are respectively threaded to the two ends of the double-threaded rod 14. When the drive motor 15 drives the double-threaded rod 14 to rotate, the double-threaded rod 14 drives the two clamping plates 2 to move relative to each other, thereby clamping and positioning the workpiece. To remove the workpiece, simply reverse the rotor direction of the drive motor 15. At this time, the double-threaded rod 14 will drive the two clamping plates 2 to move in opposite directions, thereby removing the workpiece from its limit and allowing it to be removed.

[0024] During the positioning of the workpiece, since there are multiple elastic elements 4 between the buffer plate 3 and the clamping plate 2, when the two buffer plates 3 clamp the workpiece, the workpiece will exert a reverse force on the buffer plate 3, thereby causing the buffer plate 3 to squeeze the elastic elements 4, thus avoiding damage to the workpiece caused by excessive squeezing.

[0025] The limiting component 5 includes a limiting rod 51, which is inserted into the clamping plate 2. One end of the limiting rod 51 is welded to the inner side wall of the buffer plate 3, and the other end of the limiting rod 51 passes through the side wall of the clamping plate 2. The side wall of the clamping plate 2 is provided with a plurality of clamping components 6 for clamping and limiting the limiting rod 51.

[0026] It should be noted that the rod body of the limiting rod 51 has multiple annular limiting grooves, and the multiple annular limiting grooves are arranged linearly along the rod body.

[0027] The clamping assembly 6 includes multiple guide rods 61, which are all welded inside the clamping plate 2. The multiple guide rods 61 are divided into two groups and are arranged opposite to each other on both sides of the limiting rod 51. Movable plates 62 are slidably connected to the outside of the two groups of guide rods 61. A locking member 7 is provided on the opposite side of the multiple movable plates 62. Springs 63 that drive the multiple movable plates 62 to move relative to each other are nested outside the multiple guide rods 61. One end of the multiple springs 63 is welded to the outer wall of the movable plate 62, and the other end of the multiple springs 63 is welded to the clamping plate 2.

[0028] It should be noted that the side wall of the movable plate 62 is provided with multiple arc-shaped limiting grooves, which are staggered with multiple annular limiting grooves. When the buffer plate 3 positions the workpiece, it first pulls multiple movable plates 62 to reserve space for the limiting rod 51. After the buffer plate 3 completes the positioning of the workpiece, the limiting rod 51 will extend outward along the direction perpendicular to the side wall of the clamping plate 2. At this time, the multiple movable plates 62 lose their limiting position. Under the action of multiple springs 63, the multiple movable plates 62 move relative to each other, so that the arc-shaped limiting grooves on the side wall of the movable plate 62 and the annular limiting grooves of the limiting rod 51 cooperate with each other, and the arc-shaped limiting grooves and the annular limiting grooves are staggered, thereby completing the positioning of the limiting rod 51. Meanwhile, the locking component 7 limits the two movable plates 62 to prevent the limiting rod 51 from exerting force on the movable plate 62 due to the force during the processing of the workpiece, which would cause the movable plate 62 to separate and result in unstable positioning.

[0029] The engaging component 7 includes multiple engaging plates 71, which are integrally connected to the side wall of one of the movable plates 62. The multiple engaging plates 71 are respectively located on the upper and lower sides of the arc-shaped limiting groove. The other movable plate 62 has multiple slots 72 that match the engaging plates 71. Each slot 72 has a limiting block 73 inserted into it. One end of each limiting block 73 passes through the top wall of the slot 72. The top wall of the movable plate 62 is welded with multiple limiting members 8 to limit the limiting blocks 73.

[0030] The limiting component 8 includes a receiving plate 81, which is L-shaped. One end of the receiving plate 81 is welded to the top wall of the movable plate 62. A connecting rod 82 is welded to the top wall of the receiving plate 81. One end of the connecting rod 82 is inserted into the top wall of the movable plate 62. A spring 83 is nested outside the connecting rod 82. One end of the spring 83 is welded to the top wall of the receiving plate 81, and the other end of the spring 83 is welded to the top wall of the limiting block 73.

[0031] It should be noted that when the two movable plates 62 approach each other, the locking plate 71 is inserted into the locking slot 72. At this time, the side wall of the locking plate 71 applies a force to the limiting block 73. Under the action of the locking plate 71, the limiting block 73 extends along the direction perpendicular to the top wall of the movable plate 62. When the vertical surface of the locking plate 71 is in contact with the vertical surface of the limiting block 73, the limiting block 73 is lowered under the action of the spring 83, thereby limiting the locking plate 71. At this time, the side walls of the two movable plates 62 are just in contact, thus limiting the locking plate 71. To separate the two movable plates 62, simply pull the limiting block 73 to release the limiting block 73 from the locking plate 71.

[0032] The circuits and controls involved in this utility model are all existing technologies, and will not be described in detail here.

[0033] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A clamping and fixing mechanism for a CNC machine tool, comprising a base, characterized in that, It also includes multiple clamping plates, which are arranged opposite to each other on the upper surface of the base and are slidably connected to the base. Each clamping plate is nested with a buffer plate. Multiple elastic elements are inserted between the buffer plate and the clamping plates. One end of each elastic element is fixedly connected to the inner side wall of the buffer plate, and the other end of each elastic element is fixedly connected to the side wall of the clamping plate. Each clamping plate is inserted with a limiting component to limit the position of the buffer plate.

2. The clamping and fixing mechanism for a CNC machine tool according to claim 1, characterized in that, The limiting component includes a limiting rod, which is inserted into the clamping plate. One end of the limiting rod is fixedly connected to the inner side wall of the buffer plate, and the other end of the limiting rod passes through the side wall of the clamping plate. The side wall of the clamping plate is provided with multiple clamping components for clamping and limiting the limiting rod.

3. The clamping and fixing mechanism for a CNC machine tool according to claim 2, characterized in that, The clamping assembly includes multiple guide rods, all of which are fixedly connected to the clamping plate. The multiple guide rods are divided into two groups and are arranged opposite each other on both sides of the limiting rod. Movable plates are slidably connected to the outside of both groups of guide rods. A locking component is provided on the opposite side of the multiple movable plates. Springs are nested outside the multiple guide rods to drive the relative movement of the multiple movable plates. One end of the multiple springs is fixedly connected to the outer wall of the movable plate, and the other end of the multiple springs is fixedly connected to the clamping plate.

4. The clamping and fixing mechanism for a CNC machine tool according to claim 3, characterized in that, The engaging component includes multiple engaging plates, which are fixedly connected to the side wall of one of the movable plates. The other movable plate has multiple slots that match the engaging plates. Each slot contains a limiting block, one end of which passes through the top wall of the slot. The top wall of the movable plate is fixedly connected to multiple limiting components that limit the limiting blocks.

5. The clamping and fixing mechanism for a CNC machine tool according to claim 4, characterized in that, The limiting component includes a receiving plate, which is L-shaped in general. One end of the receiving plate is fixedly connected to the top wall of the movable plate. A connecting rod is fixedly connected to the top wall of the receiving plate. One end of the connecting rod is inserted into the top wall of the movable plate. A spring is nested outside the connecting rod. One end of the spring is fixedly connected to the top wall of the receiving plate, and the other end of the spring is fixedly connected to the top wall of the limiting block.

6. The clamping and fixing mechanism for a CNC machine tool according to claim 5, characterized in that, The limiting rod has multiple annular limiting grooves, and these annular limiting grooves are arranged linearly along the rod.

7. The clamping and fixing mechanism for a CNC machine tool according to claim 5, characterized in that, The side wall of the movable plate is provided with multiple arc-shaped limiting grooves, and the multiple arc-shaped limiting grooves and multiple annular limiting grooves are arranged alternately.

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