Auxiliary clamp of three-coordinate measuring instrument

Abstract

The utility model provides an auxiliary clamp of a three-coordinate measuring instrument, which belongs to the technical field of three-coordinate clamps and comprises a base, a plurality of vertical frames are fixedly connected to the top of the base, a table top is fixedly connected to the tops of the vertical frames, a vertical shaft is fixedly connected to the top of the table top, and a pressing plate is rotatably connected to the top of the vertical shaft. A plurality of shells are arranged at the top of the pressing plate, inclined plates are fixedly connected to the two inner side walls of each shell, a pushing plate is arranged in each shell, a plurality of springs are fixedly connected to the bottom face of each pushing plate, jacking columns are fixedly connected to the tops of the springs, jacking rods are fixedly connected to the tops of the jacking columns, and a pull shaft is fixedly connected to the bottom of each pushing plate; the outer side wall of the pull shaft is sleeved with a pressure spring, the bottom of the table top is fixedly connected with a fulcrum shaft, and a locking mechanism is arranged at the bottom of the table top. According to the utility model, the formed contour and the position of the clamp are fixed at the same time, the preparation time for clamping is shortened, and the overall measurement efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of three - coordinate fixtures, and more specifically, to an auxiliary fixture for a three - coordinate measuring instrument. Background Technique

[0002] A three - coordinate measuring instrument, also often referred to as a three - coordinate measuring machine or a three - coordinate measuring bed, is a high - end precision measuring device widely used in fields such as machinery, aerospace, and automotive manufacturing to efficiently and accurately detect the geometric dimensions, shape, and position accuracy of workpieces. It works within a hexahedron space range. With a detector moving on three mutually perpendicular guide rails, it can accurately position in the X, Y, and Z three - axis directions, thereby measuring the coordinate values of each point on the workpiece surface.

[0003] The auxiliary fixture of a three - coordinate measuring instrument, as an indispensable part of the measuring process, plays a key role in ensuring the stable positioning and accurate measurement of workpieces. During three - coordinate measurement, a large number of workpieces with asymmetric structures are measured. It is necessary to continuously adjust the position of the fixture and then fix the fixture to adapt to different workpieces. At the same time, in order to adapt to different workpiece contours, a universal fixture is used. Before measurement, the workpiece needs to be pressed on the surface of the universal fixture to make the universal fixture form the same contour as the workpiece surface, and then fix the contour formed by the universal fixture to more stably fix the workpiece. The process of adjusting the fixture, fixing it, forming the contour, and fixing it one by one before measurement undoubtedly prolongs the preparation time and affects the overall measurement efficiency. How to invent an auxiliary fixture for a three - coordinate measuring instrument to improve these problems has become an urgent problem for those skilled in the art. Summary of the Utility Model

[0004] To make up for the above deficiencies, the utility model provides an auxiliary fixture for a three - coordinate measuring instrument, aiming to improve the problem that the preparation time is prolonged by both fixing the position of the fixture and fixing the formed contour.

[0005] The utility model is implemented as follows:

[0006] The utility model provides an auxiliary fixture for a three - coordinate measuring instrument, which includes a base. A plurality of upright frames are fixedly connected to the top of the base. A tabletop is fixedly connected to the top of the plurality of upright frames. A vertical shaft is fixedly connected to the top of the tabletop. A pressing plate is rotatably connected to the top of the vertical shaft. A plurality of shells are arranged on the top of the pressing plate. Oblique plates are fixedly connected to both inner side walls of each shell. A pushing plate is arranged inside each shell. A plurality of springs are fixedly connected to the bottom surface of the pushing plate. A top column is fixedly connected to the top of each spring. A top rod is fixedly connected to the top of the top column. A pulling shaft is fixedly connected to the bottom of the pushing plate. A compression spring is sleeved on the outer side wall of the pulling shaft. A support shaft is fixedly connected to the bottom of the tabletop. A locking mechanism is arranged at the bottom of the tabletop.

[0007] Preferably, a plurality of mounting holes are formed in the base, anti-slip lines are provided on the top surface of the tabletop, a plurality of sliding grooves are formed in the tabletop, threaded holes are formed in the tabletop, and bolt holes are formed in the pressing plate.

[0008] Preferably, the cross-sectional profile of the inclined plate is triangular, the cross-sectional profile of the pushing plate and the inclined plate at the horizontal position is trapezoidal, the inclined plate and the pushing plate are slidably arranged, and the top of the pushing plate is arranged in non-contact with the upper inner surface of the housing.

[0009] Preferably, the top column is in a cuboid shape, the top surface of the top column is square, a plurality of the top columns are arranged in an array, a plurality of the top columns are slidably arranged up and down, and the top of the top rod is in a semi-circular shape.

[0010] Preferably, a limiting rod is slidably arranged up and down in the pulling shaft, a pushing spring is sleeved on the pulling shaft, a pulling rod is arranged below the pushing spring, the top and bottom of the pushing spring are respectively in contact with the limiting rod and the pulling rod, the pulling shaft passes through the lower end of the pulling rod and is threadedly connected with a nut through a first thread, and a plurality of equally spaced fixing grooves are arranged on the bottom surface of the tabletop, and the fixing grooves are fitted with the limiting rods.

[0011] Preferably, the locking mechanism includes a support shaft fixedly connected to the bottom of the tabletop, the support shaft penetrates through the pulling rod, a claw is fixedly connected to the bottom of the pulling rod, a locking ring is fixedly connected to the bottom of the claw, and a locking nut is threadedly connected to the bottom of the support shaft through a second thread.

[0012] Preferably, the support shaft and the pulling rod are slidably arranged up and down, and the locking ring and the locking nut are rotatably connected.

[0013] The beneficial effects of the present utility model are as follows: By pressing the workpiece on the circular top of the top rod, the top rod and the top column squeeze the spring and move downward to form the contour of the workpiece. By moving the locking nut downward, the locking nut drives the locking ring, the claw, the pulling rod, the pulling shaft, and the pushing plate to move downward. The pushing plate squeezes the top column inward through the two inclined plates on both sides. Under the action of friction, the formed workpiece contour is fixed by a plurality of top columns. While the pushing plate moves downward, the inclined plate and the housing also move downward. Under the action of friction, the housing is fixed on the top of the tabletop, completing the fixing work of the fixture. By moving the locking nut downward, the fixing of the formed contour and the fixing of the position of the fixture are simultaneously achieved, shortening the preparation time for clamping and improving the overall measurement efficiency. Description of the Drawings

[0014] To more clearly illustrate the technical solutions of the embodiments of the present utility model, the accompanying drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present utility model, and thus should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings.

[0015] Figure 1 is a schematic three-dimensional structure diagram of an auxiliary fixture for a three-coordinate measuring instrument provided by an embodiment of the present utility model;

[0016] Figure 2 is a schematic diagram of the internal structure of the housing of an auxiliary fixture for a three-coordinate measuring instrument provided by an embodiment of the present utility model;

[0017] Figure 3 is a schematic diagram of the ejector rod structure of an auxiliary fixture for a three-coordinate measuring instrument provided by an embodiment of the present utility model;

[0018] Figure 4 is a schematic diagram of the locking mechanism of an auxiliary fixture for a three-coordinate measuring instrument provided by an embodiment of the present utility model;

[0019] Figure 5 is Figure 4 the enlarged view of part A in

[0020] In the figure: 1. Base; 2. Vertical frame; 3. Tabletop; 4. Vertical shaft; 5. Pressure plate; 6. Housing; 7. Inclined plate; 8. Pushing plate; 9. Spring; 10. Top column; 11. Ejector rod; 12. Compression spring; 13. Pulling shaft; 14. Limit rod; 15. Threaded hole; 16. Pull rod; 17. Nut; 18. Support shaft; 19. Pulling claw; 20. Lock ring; 21. Lock nut; 22. Mounting hole; 23. Anti-slip pattern; 24. Bolt hole; 25. Slide groove; 26. Push spring; 27. Fixed groove. Specific Embodiments

[0021] To make the purpose, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present utility model.

[0022] Example, refer to Figures 1 - 5, An auxiliary fixture for a three - coordinate measuring instrument, comprising a base 1. A plurality of vertical frames 2 are fixedly connected to the top of the base 1. A table 3 is fixedly connected to the top of the plurality of vertical frames 2. A vertical shaft 4 is fixedly connected to the top of the table 3. A pressing plate 5 is rotatably connected to the top of the vertical shaft 4. A plurality of shells 6 are arranged on the top of the pressing plate 5. Oblique plates 7 are fixedly connected to both inner side walls of the shell 6. A pushing plate 8 is arranged inside the shell 6. A plurality of springs 9 are fixedly connected to the bottom surface of the pushing plate 8. A top column 10 is fixedly connected to the top of the spring 9. A top rod 11 is fixedly connected to the top of the top column 10. A pulling shaft 13 is fixedly connected to the bottom of the pushing plate 8. A compression spring 12 is sleeved on the outer side wall of the pulling shaft 13. A support shaft 18 is fixedly connected to the bottom of the table 3. A locking mechanism is arranged at the bottom of the table 3; A plurality of mounting holes 22 are formed in the base 1. An anti - slip pattern 23 is arranged on the top surface of the table 3. A plurality of sliding grooves 25 are formed in the table 3. A threaded hole 15 is formed in the table 3. A bolt hole 24 is formed in the pressing plate 5; The sectional profile of the oblique plate 7 is triangular. The sectional profile of the pushing plate 8 and the oblique plate 7 at the horizontal position is trapezoidal. The oblique plate 7 and the pushing plate 8 are slidably arranged. The top of the pushing plate 8 is non - contact with the upper inner surface of the shell 6; The top column 10 is cuboid - shaped. The top surface of the top column 10 is square - shaped. A plurality of top columns 10 are arranged in an array. The plurality of top columns 10 are slidably arranged up and down between each other. The top of the top rod 11 is semi - circular - shaped; A limiting rod 14 is slidably arranged up and down inside the pulling shaft 13. A pushing spring 26 is sleeved on the pulling shaft 13. A pull rod 16 is arranged below the pushing spring 26. The top and bottom of the pushing spring 26 are respectively in contact with the limiting rod 14 and the pull rod 16. The pulling shaft 13 passes through the lower end of the pull rod 16 and is threadedly connected with a nut 17 through a first thread. A plurality of equally - spaced fixed grooves 27 are arranged on the bottom surface of the table 3. The fixed grooves 27 are fitted with the limiting rods 14.

[0023] The locking mechanism includes a support shaft 18 fixedly connected to the bottom of the table 3. The support shaft 18 penetrates through the pull rod 16. A claw 19 is fixedly connected to the bottom of the pull rod 16. A lock ring 20 is fixedly connected to the bottom of the claw 19. The bottom of the support shaft 18 is threadedly connected with a lock nut 21 through a second thread; The support shaft 18 and the pull rod 16 are slidably arranged up and down between each other. The lock ring 20 and the lock nut 21 are rotatably connected; By pressing the workpiece on the circular top of the top rod 11, the top rod 11 and the top column 10 squeeze the spring 9 to move downward, forming the contour of the workpiece. By moving the lock nut 21 downward, the lock nut 21 drives the lock ring 20, the claw 19, the pull rod 16, the pulling shaft 13, and the pushing plate 8 to move downward. The pushing plate 8 squeezes the top columns 10 inward through the two - side oblique plates 7. Under the action of friction, the plurality of top columns 10 fix the formed workpiece contour. While the pushing plate 8 moves downward, it also makes the oblique plates 7 and the shell 6 move downward. Under the action of friction, the shell 6 is fixed on the top of the table 3, completing the fixing work of the fixture. By the downward movement of the lock nut 21, the fixing of the formed contour and the fixing of the fixture position are realized simultaneously, shortening the clamping preparation time and improving the overall measurement efficiency.

[0024] The working principle of the auxiliary fixture of the three-coordinate measuring instrument: By adjusting the position of the housing 6 in the sliding groove 25, the limiting rod 14 is pushed into the fixing groove 27 by the push spring 26 to adapt to workpieces of different lengths. The workpiece is pressed against the circular top of the ejector rod 11. The ejector rod 11 squeezes the spring 9 through the ejector post 10 below, so that the upper surfaces of multiple ejector rods 11 form the contour of the workpiece. By rotating the lock nut 21, the lock nut 21 moves downward. The lock nut 21 drives the lock ring 20 and the claw 19 to move downward, further driving the pull rod 16 to move downward. The pull rod 16 exerts a downward pressure on the lock nut 17, driving the pull shaft 13 to move downward. The pull shaft 13 pulls the extrusion plate 8, and the extrusion plate 8 squeezes the two inclined plates 7. Due to the reaction force of the inclined surface of the inclined plate 7, a horizontal force in the direction of the ejector post 10 is received, and the ejector post 10 is squeezed inward. Multiple ejector posts 10 are fixed to the formed workpiece contour under the action of friction. While the extrusion plate 8 moves downward, due to the reaction force of the ejector post 10, a downward force is exerted on the two inclined plates 7, causing the inclined plates 7 and the housing 6 to move downward. The housing 6 presses the upper surface of the table 3, and under the action of friction, the housing 6 is fixed on the top of the table 3, completing the fixing work of the fixture.

[0025] It should be noted that the specific model and specifications of the motor need to be selected and determined according to the actual specifications of the device, etc. The specific selection calculation method adopts the existing technology in this field, so it will not be elaborated in detail.

[0026] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. 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. An auxiliary fixture for a three-coordinate measuring instrument, comprising a base (1), characterized in that, A plurality of upright frames (2) are fixedly connected to the top of the base (1), a tabletop (3) is fixedly connected to the top of the plurality of upright frames (2), a vertical shaft (4) is fixedly connected to the top of the tabletop (3), a pressing plate (5) is rotatably connected to the top of the vertical shaft (4), a plurality of shells (6) are arranged on the top of the pressing plate (5), inclined plates (7) are fixedly connected to both inner side walls of the shell (6), a pushing plate (8) is arranged inside the shell (6), a plurality of springs (9) are fixedly connected to the bottom surface of the pushing plate (8), a top column (10) is fixedly connected to the top of the spring (9), a top rod (11) is fixedly connected to the top of the top column (10), a pulling shaft (13) is fixedly connected to the bottom of the pushing plate (8), a compression spring (12) is sleeved on the outer side wall of the pulling shaft (13), a support shaft (18) is fixedly connected to the bottom of the tabletop (3), and a locking mechanism is arranged at the bottom of the tabletop (3).

2. The auxiliary fixture of a three - coordinate measuring instrument according to claim 1, characterized in that, A plurality of mounting holes (22) are formed in the base (1), an anti-slip pattern (23) is arranged on the top surface of the tabletop (3), a plurality of sliding grooves (25) are formed in the tabletop (3), a threaded hole (15) is formed in the tabletop (3), and a bolt hole (24) is formed in the pressing plate (5).

3. The auxiliary fixture of a three - coordinate measuring instrument according to claim 1, characterized in that, The cross-sectional profile of the inclined plate (7) is triangular, the cross-sectional profile of the pushing plate (8) and the inclined plate (7) at the horizontal position is trapezoidal, the inclined plate (7) and the pushing plate (8) are slidably arranged, and the top of the pushing plate (8) is non-contact with the upper inner surface of the shell (6).

4. The auxiliary fixture of a three - coordinate measuring instrument according to claim 1, characterized in that, The top column (10) is rectangular, the top surface of the top column (10) is square, the plurality of top columns (10) are arranged in an array, the plurality of top columns (10) are slidably arranged up and down, and the top of the top rod (11) is semi-circular.

5. The auxiliary fixture of a three - coordinate measuring instrument according to claim 1, characterized in that, A limiting rod (14) is slidably arranged up and down inside the pulling shaft (13), a pushing spring (26) is sleeved on the pulling shaft (13), a pull rod (16) is arranged below the pushing spring (26), the top and bottom of the pushing spring (26) are respectively in contact with the limiting rod (14) and the pull rod (16), the pulling shaft (13) passes through the lower end of the pull rod (16) and is threadedly connected with a nut (17) through a first thread, and a plurality of equally spaced fixing grooves (27) are arranged on the bottom surface of the tabletop (3), and the fixing grooves (27) are fitted with the limiting rod (14).

6. The auxiliary fixture of a three - coordinate measuring instrument according to claim 5, characterized in that, The locking mechanism includes a support shaft (18) fixedly connected to the bottom of the tabletop (3), the support shaft (18) penetrates through the pull rod (16), a claw (19) is fixedly connected to the bottom of the pull rod (16), a lock ring (20) is fixedly connected to the bottom of the claw (19), and a lock nut (21) is threadedly connected to the bottom of the support shaft (18) through a second thread.

7. The auxiliary fixture of a three - coordinate measuring instrument according to claim 6, characterized in that, The support shaft (18) and the pull rod (16) are slidably arranged up and down, and the lock ring (20) and the lock nut (21) are rotatably connected.

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