A machine tool fixture

Abstract

This utility model discloses a machine tool fixture, relating to the field of machine tool equipment technology. It includes a worktable and a limiting assembly. A base plate is detachably connected to the worktable, and a fixed fixture is provided on the base plate. A movable fixture is horizontally slidably connected to the worktable. Two fixed blocks are horizontally slidably connected to the worktable in the opposite direction, and the two fixed blocks are respectively engaged with the two sides of the base plate. The limiting assembly is disposed within the worktable and includes a turntable. Two cylinders are symmetrically arranged on the turntable, and a rocker arm is rotatably sleeved on each of the two cylinders. A connecting post is provided at the bottom of each of the two fixed blocks, and the far ends of the two rocker arms are respectively rotatably sleeved with the two connecting posts. This machine tool fixture, by rotating the turntable, drives the two rocker arms to swing, causing the two fixed blocks to move closer and fix the base plate, achieving rapid replacement and installation of the base plate, thereby improving the efficiency of parts processing. It also solves the problem of bolts easily jamming after prolonged use when changing different fixing fixtures on existing machine tools.

Description

Technical Field

[0001] This utility model relates to the field of machine tool equipment technology, specifically to a machine tool fixture. 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] For example, Chinese patent CN212918567U, entitled "A Workpiece Fixture for CNC Machine Tools," includes: a fixture base, an operating table, the operating table being fixedly welded to the top of the fixture base, a moving mechanism, the moving mechanism further including a moving platform, a sliding groove, and a slider, the moving platform being fixedly welded to both sides of the top of the operating table, the top of the two moving platforms having sliding grooves, the sliding grooves being slidably connected to the sliders, and a clamping structure, the clamping structure further including a hydraulic cylinder, a push rod, a movable clamping plate, and a fixed clamping plate, the output end of the hydraulic cylinder being connected to the push rod, one end of the push rod being connected to the movable clamping plate, and the top of the operating table having a fixed clamping plate welded to the side away from the movable clamping plate. This utility model is a workpiece fixture for CNC machine tools that eliminates the need to adjust the clamping size of the fixture using nuts, and automatically releases the workpiece when the fixture needs to be changed for grinding, saving time and effort, and protecting the clamped surface of the workpiece from damage.

[0004] While the workpiece fixture for CNC machine tools described in the aforementioned patent is practical and convenient, it also has its shortcomings. Existing CNC machine tools require the replacement of different clamping plates when processing different parts. In most devices, the fixed clamping plates are directly bolted to the fixture base plate, which is cumbersome and time-consuming (especially when changing frequently). The bolts are prone to stripping or loosening due to repeated disassembly and reassembly, and the positional accuracy needs to be calibrated upon reinstallation. Utility Model Content

[0005] The purpose of this invention is to provide a machine tool fixture to address the shortcomings of the prior art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: The machine tool fixture includes a worktable and a limiting assembly. A base plate is detachably connected to the worktable, and a fixed fixture is provided on the base plate. A movable fixture is horizontally slidably connected to the worktable. Two fixed blocks are horizontally slidably connected to the worktable in the opposite direction. The two fixed blocks are respectively engaged with the two sides of the base plate. The limiting assembly is disposed within the worktable and includes a turntable. Two cylinders are symmetrically arranged on the turntable, and a rocker arm is rotatably sleeved on each of the two cylinders. A connecting post is provided at the bottom of each of the two fixed blocks, and the ends of the two rocker arms that are far apart are respectively rotatably sleeved with the two connecting posts.

[0007] Furthermore, a guide is provided on the workbench, which allows the two fixed blocks to slide in opposite straight lines.

[0008] Furthermore, the guide includes two slide grooves, which are symmetrically opened on the worktable, and the two connecting columns are slidably connected in the two slide grooves respectively.

[0009] Furthermore, the lower cross-sections of both connecting columns are circular, and the upper cross-sections of both connecting columns are rectangular.

[0010] Furthermore, a connecting block is coaxially fixedly connected to the bottom end of the turntable, and a spiral groove is formed in the connecting block. A sleeve is vertically slidably connected inside the worktable, and a protrusion is provided on the peripheral side of the sleeve, which slides in cooperation with the spiral groove.

[0011] Furthermore, a rotating rod is rotatably connected inside the workbench, and a first bevel gear is fixedly and coaxially sleeved on the rotating rod. A second bevel gear that meshes with the first bevel gear is horizontally and rotatably connected inside the workbench. A screw is coaxially and fixedly connected to the top end of the second bevel gear, and the sleeve is screwed to the screw.

[0012] Furthermore, a limiting hole is provided on the sleeve, and a limiting rod is vertically arranged inside the worktable, and the sleeve is slidably sleeved on the limiting rod through the limiting hole.

[0013] Compared with the prior art, the beneficial effects provided by this utility model are as follows: the machine tool fixture, by rotating the turntable, drives the two swing arms to swing, causing the two fixed blocks to move closer to fix the base plate, realizing the quick replacement and installation of the base plate, thereby improving the processing efficiency of parts, and solving the problem that bolts are prone to jamming after long-term use when changing different fixed fixtures on existing machine tools, and that disassembly is inconvenient. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0015] Figure 1 A schematic diagram of the overall structure provided for an embodiment of this utility model;

[0016] Figure 2 Top view of the overall structure provided for an embodiment of this utility model;

[0017] Figure 3 for Figure 2 Sectional view at point AA;

[0018] Figure 4 for Figure 3 Enlarged view of point B in the middle;

[0019] Figure 5 This is a schematic diagram of the structure of the transmission assembly provided in an embodiment of the present utility model;

[0020] Figure 6 This is a partial structural diagram provided for an embodiment of the present utility model.

[0021] Explanation of reference numerals in the attached drawings: 1. Workbench; 2. Rotating rod; 3. Handwheel; 4. Base plate; 5. Fixed clamp; 6. Moving clamp; 7. Hydraulic cylinder; 8. Fixed block; 9. First bevel gear; 10. Second bevel gear; 11. Screw; 12. Sleeve; 13. Protrusion; 14. Limiting rod; 15. Limiting hole; 16. Connecting block; 17. Spiral groove; 18. Turntable; 19. Swing rod; 20. Cylinder; 21. Connecting column; 22. Slide groove; 23. Fixed groove. Detailed Implementation

[0022] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0023] Please see Figure 1-6The present invention provides a technical solution for a machine tool fixture, comprising a worktable 1 and a limiting component. A base plate 4 is detachably connected to the worktable 1, and a fixed fixture 5 is provided on the base plate 4. A movable fixture 6 is horizontally slidably connected to the worktable 1, and two fixed blocks 8 are horizontally slidably connected to the worktable 1 in the opposite direction. The two fixed blocks 8 are respectively engaged with the two sides of the base plate 4. The limiting component is disposed inside the worktable 1 and includes a turntable 18. Two cylinders 20 are symmetrically arranged on the turntable 18, and a swing rod 19 is rotatably sleeved on each of the two cylinders 20. A connecting post 21 is provided at the bottom of each of the two fixed blocks 8. The ends of the two swing rods 19 that are far apart are respectively rotatably sleeved with the two connecting posts 21. Specifically, a hydraulic cylinder 7 is provided on the worktable 1. The hydraulic cylinder 7 drives the movable fixture 6 to move toward the fixed fixture 5, and cooperates with the fixed fixture 5 to clamp and fix the parts.

[0024] In this embodiment, a guide is provided on the workbench 1, which allows the two fixed blocks 8 to slide in a straight line in opposite directions. The guide includes two sliding grooves 22, which are symmetrically opened on the workbench 1. Two connecting columns 21 are slidably connected in the two sliding grooves 22. During the rotation of the turntable 18, the cylinder 20 rotates synchronously, driving the two swing rods 19 to rotate. The sliding grooves 22 restrict the movement direction of the fixed blocks 8, so that the two swing rods 19 drive the two fixed blocks 8 to slide in opposite directions through the corresponding connecting columns 21. A fixed groove 23 is opened in each of the two fixed blocks 8, and the two sides of the base plate 4 are respectively engaged in the fixed grooves 23.

[0025] In this embodiment, the lower cross-sections of the two connecting columns 21 are both circular, and the upper cross-sections of the two connecting columns 21 are both rectangular. Specifically, the shapes of the two sliding grooves 22 are matched one-to-one with the upper parts of the two connecting columns 21. The rectangular shape is to prevent the connecting columns 21 from rotating during linear movement, which would cause the fixing block 8 to rotate and make it impossible to quickly fix the base plate 4.

[0026] In this embodiment, a connecting block 16 is coaxially fixedly connected to the bottom end of the turntable 18. A spiral groove 17 is formed in the connecting block 16. A sleeve 12 is vertically slidably connected in the worktable 1. A protrusion 13 is provided on the peripheral side of the sleeve 12. The protrusion 13 is slidably engaged with the spiral groove 17. Specifically, when the sleeve 12 moves vertically upward, the linear motion component of the protrusion 13 drives the sleeve 12 to rotate through the sliding engagement of the protrusion 13 and the spiral groove 17, thereby realizing the rotation of the turntable 18.

[0027] In this embodiment, a rotating rod 2 is rotatably connected inside the workbench 1. A first bevel gear 9 is fixedly and coaxially sleeved on the rotating rod 2. A second bevel gear 10, which meshes with the first bevel gear 9, is horizontally rotatably connected inside the workbench 1. A screw 11 is coaxially and fixedly connected to the top of the second bevel gear 10. A sleeve 12 is screwed to the screw 11. Specifically, a limiting hole 15 is provided on the sleeve 12. A limiting rod 14 is vertically arranged inside the workbench 1, and the sleeve 12 is slidably sleeved on the limiting rod 14 through the limiting hole 15. More specifically, rotating the rotating rod 2 can drive the first bevel gear 9 to rotate. The first bevel gear 9, through meshing with the second bevel gear 10, causes the screw 11 to rotate. The limiting rod 14 restricts the axial rotation of the sleeve 12. The screw 11 drives the sleeve 12 to move linearly along the length direction of the limiting rod 14 through the helical transmission. A motor can be provided at one end of the rotating rod 2 to drive the rotating rod 2 to rotate.

[0028] Preferably, a handwheel 3 can be coaxially mounted on one end of the rotating rod 2, which can facilitate the rotation of the rotating rod 2 and solve the problem that the rotating rod 2 of the device is not easy to rotate. Considering the long-term repetitive operation of the operator, the setting of the handwheel 3 can reduce the discomfort of repetitive operation to the operator's hands, thereby further bringing convenience to the operator.

[0029] It should be noted that the specific models and specifications of the motor and hydraulic cylinder 7 need to be selected and determined according to the actual specifications of the device. The specific selection and wiring methods adopt existing technologies in this field, so they will not be described in detail here.

[0030] Working principle: This machine tool uses a fixture. During use, rotating the handwheel 3 drives the rotating rod 2 to rotate, which in turn drives the first bevel gear 9 to rotate. The first bevel gear 9, through meshing with the second bevel gear 10, causes the screw 11 to rotate. The limiting rod 14 restricts the axial rotation of the sleeve 12. The screw 11's helical transmission drives the sleeve 12 to move vertically upwards along the length of the limiting rod 14. This vertical upward movement of the sleeve 12, through the sliding engagement of the protrusion 13 and the helical groove 17, causes the linear motion component of the protrusion 13 to drive the sleeve 12 to rotate. This allows the turntable 18 to rotate, the cylinder 20 to rotate synchronously, and the two rocker arms 19 to rotate. The sliding groove 22 restricts the movement direction of the fixed block 8, so that the two rocker arms 19 drive the two fixed blocks 8 to slide in the opposite direction through the corresponding connecting column 21. The two sides of the base plate 4 are respectively engaged in the fixed groove 23, which realizes the quick replacement and installation of the base plate 4, thereby improving the processing efficiency of parts. It solves the problem that when the existing machine tool changes different fixed fixtures 5, the bolts are prone to jamming after a long period of use and are not easy to disassemble.

[0031] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A machine tool fixture, comprising a worktable (1), a base plate (4) detachably connected to the worktable (1), a fixed fixture (5) provided on the base plate (4), a movable fixture (6) slidably connected to the worktable (1), and two fixed blocks (8) slidably connected to the worktable (1) in the opposite direction, the two fixed blocks (8) respectively engaging with the two sides of the base plate (4), characterized in that, Also includes: A limiting component is disposed within the worktable (1); The limiting component includes a turntable (18), on which two cylinders (20) are symmetrically arranged. A swing rod (19) is rotatably sleeved on each of the two cylinders (20). A connecting post (21) is provided at the bottom of each of the two fixed blocks (8). The ends of the two swing rods (19) that are far apart are rotatably sleeved with the two connecting posts (21) respectively.

2. The machine tool fixture according to claim 1, characterized in that, The workbench (1) is provided with a guide, which allows the two fixed blocks (8) to slide in opposite directions in a straight line.

3. A machine tool fixture according to claim 2, characterized in that, The guide includes two slides (22), which are symmetrically opened on the worktable (1), and the two connecting columns (21) are slidably connected in the two slides (22).

4. A machine tool fixture according to claim 3, characterized in that, The lower cross-sections of both connecting columns (21) are circular, and the upper cross-sections of both connecting columns (21) are rectangular.

5. A machine tool fixture according to claim 1, characterized in that, A connecting block (16) is coaxially fixedly connected to the bottom end of the turntable (18). A spiral groove (17) is opened in the connecting block (16). A sleeve (12) is vertically slidably connected in the worktable (1). A protrusion (13) is provided on the peripheral side of the sleeve (12). The protrusion (13) slides with the spiral groove (17).

6. A machine tool fixture according to claim 5, characterized in that, A rotating rod (2) is rotatably connected inside the workbench (1). A first bevel gear (9) is fixedly and coaxially sleeved on the rotating rod (2). A second bevel gear (10) that meshes with the first bevel gear (9) is horizontally and rotatably connected inside the workbench (1). A screw (11) is fixedly and coaxially connected to the top of the second bevel gear (10). The sleeve (12) is screwed to the screw (11).

7. A machine tool fixture according to claim 6, characterized in that, The sleeve (12) has a limiting hole (15), and a limiting rod (14) is vertically arranged inside the worktable (1). The sleeve (12) is slidably sleeved on the limiting rod (14) through the limiting hole (15).

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