Clamping mechanism of precise numerical control machine tool

Abstract

The utility model discloses a clamping mechanism of a precise numerical control machine tool. The clamping mechanism comprises a fixed seat, a screw rod, a clamping block and a protective structure, through the arrangement of the protection structure, after the installation blocks are in butt joint with the screw rod, the protection sleeve is arranged on the surface of the screw rod in a sleeving mode, then when the installation blocks at the left end and the right end of the protection sleeve are attached to the surfaces of the fixing base and the clamping block respectively, and after the positioning blocks slide into the positioning grooves, the positioning blocks are clamped into the positioning grooves under the action of the springs; according to the protective sleeve, the installation block is installed, the protective sleeve is fixed to the surface of the screw rod and wraps the screw rod, during machining of a numerical control machine tool, chippings can be isolated through the protective sleeve and cannot fall on the surface of the screw rod, and the screw rod is effectively protected.

Description

Technical Field

[0001] The utility model relates to the relevant field of numerical control machine tools, in particular to a clamping mechanism of a precision numerical control machine tool. Background Art

[0002] CNC machine tool is the abbreviation of digital control machine tool. It is an automated machine tool equipped with a program control system. CNC machine tool can better solve the problems of complex, precise, small batch and multi-variety parts processing. It is a flexible and high-efficiency automated machine tool. It represents the development direction of modern machine tool control technology and is a typical mechatronics product. When processing parts, CNC machine tools need to fix the parts on the CNC machine tools through a clamping mechanism.

[0003] Existing patent: CN220637061U, discloses a clamp for CNC machine tools, including a workbench and an arc-shaped clamping plate, wherein two left-right symmetrical horizontal slide grooves are horizontally opened inside the workbench, and transverse racks are movably arranged inside the transverse slide grooves, and a connecting block is fixedly arranged on the upper surface of one end of the transverse racks close to each other, and a transmission gear is meshed below the transverse rack, and the transmission gear is mounted inside the workbench in a front-to-back direction, and two left-right symmetrical longitudinal slide grooves are longitudinally opened on the workbench, and a longitudinal rack is movably arranged in the longitudinal slide groove, and an inverted hydraulic cylinder is embedded in the center position of the bottom of the workbench, and a lifting plate is fixedly connected to the lower end of the hydraulic cylinder, which drives the connecting block, the arc-shaped clamping plate, and the anti-slip pad to move away from or close to each other through a mechanical structure, thereby facilitating the disassembly and assembly of the workpiece, saving manpower, shortening the processing interval time, and improving efficiency.

[0004] The above patents or existing clamping mechanisms have the following problems:

[0005] The existing clamping mechanism will generate a large amount of debris when processing after fixing the parts. However, the existing clamping mechanism has poor protection for the screw. The debris will fall on the surface of the screw and move along the surface of the screw when the clamping block rotates. During this process, the debris may enter the connection between the clamping block and the screw, causing the problem of thread jamming. Utility Model Content

[0006] Therefore, in order to solve the above-mentioned shortcomings, the utility model provides a clamping mechanism for a precision CNC machine tool.

[0007] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a clamping mechanism of a precision CNC machine tool, comprising a fixed seat, a screw is arranged in the middle of the fixed seat, and a clamping block connected to the screw, a protective structure is arranged on the surface of the screw, and the protective structure includes a protective sleeve, which is arranged on the surface of the screw, and mounting blocks are arranged at both ends of the left and right ends of the protective sleeve, and the mounting blocks at the left and right ends are respectively fixed to the inner wall of the fixed seat and the surface of the clamping block to achieve the fixation of the protective sleeve, the screw passes through the middle of the mounting block, a spring is arranged inside the mounting block, and a slider connected to the spring, a positioning block is arranged on the surface of the slider, and the positioning block is connected to the positioning groove arranged on the fixed seat and the inner wall of the clamping block to achieve the fixation of the mounting block.

[0008] Preferably, springs are provided at both upper and lower ends of the mounting block, and the springs at both ends have the same matching structure.

[0009] Preferably, the outer side surfaces of the positioning block are processed with left and right inclined surfaces, and the inclined surfaces are smooth.

[0010] Preferably, the surface of the positioning groove notch that contacts the inclined surface of the positioning block is processed with left and right inclined surfaces, and the inclination angle of the inclined surface is the same as the angle of the inclined surface set on the positioning block.

[0011] Preferably, a spring groove is provided inside the positioning groove, the spring groove is communicated with the positioning groove, a second spring is installed inside the spring groove, and a top block is provided at one end of the second spring.

[0012] Preferably, a slide groove is provided on the surface of the top block, the slide groove slides along the surface of the limit block, and the limit block is provided on the inner wall of the spring groove.

[0013] Beneficial effects of the utility model:

[0014] The utility model is provided with a protective structure. After the mounting block is connected to the screw rod, the protective sleeve is sleeved on the surface of the screw rod. Then, when the mounting blocks at the left and right ends of the protective sleeve are respectively fitted with the fixed seat and the surface of the clamping block, the positioning block slides into the positioning groove and is stuck in the positioning groove under the action of the spring, so as to realize the installation of the mounting block, fix the protective sleeve on the surface of the screw rod, and wrap the screw rod. During CNC machine tool processing, debris will pass through the isolation of the protective sleeve and will not fall on the surface of the screw rod, thereby effectively protecting the screw rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the utility model;

[0016] Figure 2 It is a schematic diagram of the structure of the utility model from top view;

[0017] Figure 3This is a schematic diagram of the cross-sectional structure of the protective cover of the utility model from top view;

[0018] Figure 4 This is a schematic diagram of the front cross-sectional structure of the installation block of the utility model;

[0019] Figure 5 It is a partial enlarged view of area A of the utility model.

[0020] Among them: fixing seat -1, screw -2, clamping block -3, protective structure -4, protective sleeve -41, mounting block -42, spring -43, slider -44, positioning block -45, positioning groove -46, spring groove -470, second spring -47, top block -48, inclined surface -461, slide groove -471, limit block -472. DETAILED DESCRIPTION

[0021] In order to further explain the technical solution of the present utility model, it is described in detail through specific embodiments below.

[0022] See also Figure 1 , Figure 2 and Figure 3 The utility model provides a clamping mechanism for a precision CNC machine tool, comprising a fixed seat 1, a rotatably connected screw rod 2 is arranged in the middle of the fixed seat 1, a clamping block 3 threadedly connected to the screw rod 2, the clamping block 3 can slide along the surface of the fixed seat 1 through the rotating screw rod 2, and a protective structure 4 is arranged on the surface of the screw rod 2;

[0023] The fixing seat 1 is fixed on the working table of the CNC machine tool by bolts, and then the part to be processed is placed between the two clamping blocks 3, and then the screw 2 is rotated to make the two clamping blocks 3 contract to clamp the part.

[0024] See also Figure 3 , Figure 4 and Figure 5The utility model provides a clamping mechanism for a precision CNC machine tool. The protective structure 4 includes a protective sleeve 41, which is sleeved on the surface of the screw rod 2. Mounting blocks 42 are arranged at both left and right ends of the protective sleeve 41. Springs 43 are arranged at both upper and lower ends inside the mounting block 42. One end of the spring 43 is fixed inside the mounting block 42, and a slider 44 is fixed at the other end. A positioning block 45 is integrally formed on the surface of the slider 44. The positioning block 45 is vertically slidably connected to the inner wall of the mounting block 42, and the positioning block 45 protrudes from the outer surface of the mounting block 42. The screw rod 2 passes through the middle of the mounting block 42, and the screw rod 2 does not contact the inner wall of the mounting block 42. The positioning block 45 is connected to the positioning groove 46 arranged on the inner wall of the fixing seat 1 and the clamping block 3. The outer side surface of the positioning block 45 is processed with left and right inclined surfaces, and the inclined surface is smooth. The surface where the notch of the positioning groove 46 contacts the inclined surface of the positioning block 45 is processed with left and right inclined surfaces 461. The inclined surface 461 The inclination angle is the same as the angle of the inclined surface set on the positioning block 45, so that the positioning block 45 can be plugged and installed to achieve the fixation of the mounting block 42;

[0025] A spring groove 470 is provided inside the positioning groove 46, and the spring groove 470 is communicated with the positioning groove 46. A second spring 47 is installed inside the spring groove 470, and a top block 48 is provided at one end of the second spring 47. The top block 48 can push the positioning block 45 located inside the positioning groove 46, so that the positioning block 45 is stable inside. A sliding groove 471 is provided on the surface of the top block 48, and the sliding groove 471 slides along the surface of the limit block 472. The limit block 472 is provided on the inner wall of the spring groove 470 to prevent the top block 48 from sliding too much.

[0026] After the mounting block 42 is connected to the screw 2, the protective sleeve 41 is sleeved on the surface of the screw 2. Then, when the mounting block 42 at one end of the protective sleeve 41 fits against the inner wall of the fixing seat 1, the positioning block 45 is subjected to force to drive the slider 44 to slide, and the spring 43 is compressed to generate elastic force. When the positioning block 45 slides into the positioning groove 46, the spring 43 pushes the slider 44, so that the positioning block 45 is stuck in the positioning groove 46 to achieve the installation of the mounting block 42. The mounting block 42 at the other end of the protective sleeve 41 is fixed to the surface of the clamping block 3 through the above steps to achieve the fixing of the protective sleeve 41 on the surface of the screw 2 and wrap the screw 2. During CNC machine processing, debris will pass through the isolation of the protective sleeve 41 and will not fall on the surface of the screw 2, thereby effectively protecting the screw 2.

[0027] The above description is only a preferred example of the present invention and is not intended to limit the present invention. Although the present invention is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions described in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A clamping mechanism for a precision CNC machine tool, comprising a fixed seat (1), a screw (2) being arranged in the middle of the fixed seat (1), and a clamping block (3) connected to the screw (2); Features: The invention also comprises a protective structure (4), wherein the surface of the screw rod (2) is provided with the protective structure (4), wherein the protective structure (4) comprises a protective sleeve (41), wherein the protective sleeve (41) is sleeved on the surface of the screw rod (2), and mounting blocks (42) are provided at both left and right ends of the protective sleeve (41), wherein the mounting blocks (42) at the left and right ends are respectively fixed to the inner wall of the fixing seat (1) and the surface of the clamping block (3) to achieve the fixing of the protective sleeve (41), wherein the screw rod (2) passes through the middle of the mounting block (42), wherein a spring (43) is provided inside the mounting block (42), and a slider (44) connected to the spring (43), wherein a positioning block (45) is provided on the surface of the slider (44), and wherein the positioning block (45) is connected to a positioning groove (46) provided on the inner wall of the fixing seat (1) and the clamping block (3) to achieve the fixing of the mounting block (42).

2. The clamping mechanism of a precision CNC machine tool according to claim 1, characterized in that: Springs (43) are provided at both upper and lower ends of the mounting block (42), and the springs (43) at both ends have the same matching structure.

3. The clamping mechanism of a precision CNC machine tool according to claim 2, characterized in that: The outer side surfaces of the positioning block (45) are processed with left and right inclined surfaces, and the inclined surfaces are smooth.

4. The clamping mechanism of a precision CNC machine tool according to claim 3, characterized in that: The surface where the notch of the positioning groove (46) contacts the inclined surface of the positioning block (45) is processed into left and right inclined surfaces (461), and the inclined angle of the inclined surface (461) is the same as the inclined surface angle set on the positioning block (45).

5. The clamping mechanism of a precision CNC machine tool according to claim 2, characterized in that: A spring groove (470) is provided inside the positioning groove (46), the spring groove (470) is communicated with the positioning groove (46), a second spring (47) is mounted inside the spring groove (470), and a top block (48) is provided at one end of the second spring (47).

6. The clamping mechanism of a precision CNC machine tool according to claim 5, characterized in that: The surface of the top block (48) is provided with a slide groove (471), and the slide groove (471) slides along the surface of a limit block (472), and the limit block (472) is arranged on the inner wall of the spring groove (470).

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