Auxiliary clamp of three-coordinate measuring instrument

Abstract

The utility model relates to an auxiliary clamp of a three-coordinate measuring instrument, the auxiliary clamp comprises a mounting seat, a moving assembly, limiting assemblies and fixing assemblies, the moving assembly is arranged on the mounting seat, the limiting assemblies are arranged on the moving assembly, and the fixing assemblies are arranged at four corners of the bottom of the mounting seat and used for fixing the mounting seat. The auxiliary fixture has the effect of protecting the three-coordinate measuring instrument from being damaged when the auxiliary fixture is fixed.

Description

Technical Field

[0001] This application relates to the technical field of coordinate measuring technology, and particularly relates to an auxiliary fixture for a coordinate measuring instrument. Background Art

[0002] Coordinate measuring instruments are widely used in industries such as machinery, electronics, instrumentation, and plastics. A coordinate measuring instrument is one of the most effective methods for measuring and obtaining dimensional data because it can replace a variety of surface measuring tools and expensive combination gauges, and reduce the time required for complex measurement tasks from hours to minutes, which is an effect that other instruments cannot achieve.

[0003] Currently, the main types of coordinate measuring instruments in use are bridge measuring machines, gantry measuring machines, horizontal arm measuring machines, and portable measuring machines. The measurement methods can be roughly divided into two types: contact type and non-contact type. Gantry coordinate measuring instruments and multi-functional coordinate series image measuring instruments are precision and efficient length measuring instruments that integrate precision machinery, optics, electronics, and computer software. The instrument utilizes the most advanced image information processing technology, coordinate measurement technology, computer measurement and control technology, and programmable control optical lighting technology, and is widely used in industries such as machinery, instrumentation, watches, and light industry, as well as in colleges, universities, research institutes, and metrology verification departments. This instrument can efficiently detect the contour dimensions and surface shapes of various complex-shaped workpieces, such as templates, stamping parts, cams, threads, gears, formed milling cutters, taps, molds, mobile phone parts, and other tools, cutters, and parts.

[0004] Currently, most of the auxiliary fixtures on the market are not produced by coordinate measuring instrument manufacturers in a supporting manner. Most of the auxiliary fixtures are developed by the respective purchasers of the commodities themselves. However, most of the auxiliary fixtures have a problem, which is the fixation problem between the auxiliary fixture and the coordinate measuring instrument. Some auxiliary fixtures will adopt some hard-contact fixation methods, such as bolts, but this will cause irreparable damage to the coordinate measuring instrument during the installation process and long-term use, reducing the service life of the coordinate measuring instrument. Content of the Utility Model

[0005] In order to protect the coordinate measuring instrument from being damaged during the fixation of the auxiliary fixture, this application provides an auxiliary fixture for a coordinate measuring instrument.

[0006] This application provides an auxiliary fixture for a coordinate measuring instrument, adopting the following technical solutions:

[0007] An auxiliary fixture for a coordinate measuring instrument includes a mounting base, a moving component, a limiting component, and a fixing component. The moving component is arranged on the mounting base, the limiting component is arranged on the moving component, and the fixing component is arranged at the four corners of the bottom of the mounting base for fixing the mounting base.

[0008] The fixing component includes a suction cup head, a connecting pipe, a piston head, a pulling rod, a fixing clip and a cylinder. The connecting pipe is arranged at the four corners of the mounting base along the vertical direction. The suction cup head is fixedly connected to one end of the connecting pipe at the bottom of the mounting base. One end of the pulling rod is fixedly connected to the piston head. The piston head is arranged inside the connecting pipe. The end of the pulling rod away from the piston head extends out of one end of the connecting pipe above the mounting base. The cylinder is vertically arranged above the mounting base and on one side of the connecting pipe. The fixing clip is arranged at the pushing end of the cylinder. The end of the fixing clip away from the cylinder is detachably connected to the pulling rod.

[0009] By adopting the above technical solution, after aligning the suction cup head to the designated position, the operator presses the mounting base forcefully to first discharge some air between the suction cup head and the contact surface. At the same time, the cylinder is controlled to push upwards. The cylinder drives the fixing clip to move upwards, and the fixing clip also drives the pulling rod to move the piston head upwards from the connecting pipe, further discharging the air in the suction cup head, so that the suction cup head tightly adheres to the contact surface, thus achieving the purpose of firmly fixing the mounting base and ensuring that the contact surface of the coordinate measuring instrument is not damaged.

[0010] Optionally, the fixing clip includes two symmetrically arranged fixing plates. The fixing plate includes a straight plate portion and an arc portion. The straight plate portion is connected to the cylinder. The arc portion is used to limit the pulling rod. A blocking piece is arranged at the end of the pulling rod away from the piston head.

[0011] By adopting the above technical solution, the straight plate portion is connected to the pushing end of the cylinder, and the arc portion fixes the pulling rod. The limiting plate ensures that the arc portion will not slide off the pulling rod when pulling the pulling rod, thus ensuring that after the suction cup head is firmly adsorbed, the pulling rod will not fall back and cause the adsorption to drop, ensuring the stability and safety of the adsorption.

[0012] Optionally, the mounting base includes a short beam and a long beam. There are two short beams, and the two short beams are symmetrically arranged at both ends of the long beam, and the end of the long beam is located at the center position of the short beam. The connecting pipe is arranged at the end of the short beam.

[0013] By adopting the above technical solution, the design of the short beam and the long beam can reduce the volume and weight of the mounting base, which can save effort when the operator takes and places it. At the same time, the connecting pipe is designed at the end of the short beam to fix the mounting base with the fewest fixing components, saving materials to a certain extent and achieving the purpose of fixing.

[0014] Optionally, there are two sets of the moving components. Each set of the moving components includes a moving frame, a locking member, and a column. The moving frame is disposed on the long beam, the locking member is used to fix the moving frame on the long beam, and the column is disposed on the top of the moving frame.

[0015] By adopting the above technical solution, the purpose of the moving component is to adapt to the size of the component to be measured by moving. The movement is achieved by the sliding of the moving frame on the long beam. On the one hand, the contact area between the moving frame and the long beam is large, and at the same time, there are many force application points, which can better ensure the stability of the column. On the other hand, the movement frame is limited by the locking member, which can further enhance its stability on the original basis and reduce the jitter generated during the detection process.

[0016] Optionally, the moving frame is provided with threaded holes, the locking member is a bolt, and the bolt is threadedly connected in the threaded holes.

[0017] By adopting the above technical solution, it is very convenient to limit and fix the moving frame through the cooperation of the bolt and the threaded hole, and the operation is simple and the cost is extremely low.

[0018] Optionally, the limiting component includes a plurality of limiting plates. The plurality of limiting plates are uniformly distributed in the vertical direction at one end of the column away from the moving frame and are located between the two columns.

[0019] By adopting the above technical solution, there are two methods to ensure the stability and firmness of the component to be measured during the measurement process. One is to increase the contact area between the limiting component and the component to be measured, and the other is to increase the contact points. In the three-coordinate measurement, increasing the contact area will occupy the measurement position. Therefore, a plurality of groups of limiting plates are provided to increase the contact points with the component to be measured, which not only ensures the firmness of the limiting of the component to be measured by the limiting plates, but also does not occupy too much measurement position, ensuring stability and improving the detection efficiency at the same time.

[0020] Optionally, one side of the limiting plate away from the column is corrugated, and a sponge layer is provided on the corrugation.

[0021] By adopting the above technical solution, the sponge layer is a flexible material, and the main component of the sponge layer is fiber. Using the sponge layer to contact the component to be measured can not only increase the friction between them, thus ensuring the firmness of the limit, but also play a protective role for the component to be measured, avoiding the damage caused by rigid contact.

[0022] In summary, the present application includes at least one of the following beneficial technical effects:

[0023] 1. By setting a fixed component, the cylinder pushes the fixed clamp, and the fixed clamp drives the pull rod to move upward, thereby driving the piston head to move upward. During the upward movement of the piston head, the air between the suction cup head and the contact surface is sucked out, so that the suction cup head and the contact surface are firmly connected together in the form of atmospheric pressure. This not only achieves the purpose of fixing the position, but also achieves the purpose of not damaging the contact surface of the coordinate measuring instrument. At the same time, the blocking piece at the end of the pull rod also ensures that the pull rod will not fall off during the pulling and fixing process;

[0024] 2. The purpose of setting the moving component is to adapt to the size of the workpiece to be measured by moving. The movement is achieved by the sliding of the moving frame on the long beam. On the one hand, the contact area between the moving frame and the long beam is large, and at the same time, there are many force application points, which can better ensure the stability of the column. On the other hand, limiting the moving frame through the locking piece can further enhance its stability on the original basis and reduce the jitter generated during the detection process;

[0025] 3. There are two methods to ensure the stability and firmness of the workpiece to be measured during the measurement process. One is to increase the contact area between the limiting component and the workpiece to be measured, and the other is to increase the contact points. In coordinate measurement, increasing the contact area will occupy the measurement position. Therefore, multiple groups of limiting plates are set to increase the contact points with the workpiece to be measured, which not only ensures the firmness of the limiting of the workpiece to be measured by the limiting plate, but also does not occupy too much measurement position, ensuring stability while improving the detection efficiency. Brief Description of the Drawings

[0026] Figure 1 is a schematic structural diagram of an auxiliary fixture for a coordinate measuring instrument disclosed in an embodiment of the present application;

[0027] Figure 2 is a cross-sectional view of an auxiliary fixture for a coordinate measuring instrument disclosed in an embodiment of the present application;

[0028] Figure 3 is a partial schematic structural diagram of an auxiliary fixture for a coordinate measuring instrument disclosed in an embodiment of the present application.

[0029] Reference Numerals: 1, mounting base; 11, short beam; 12, long beam; 2, moving component; 21, moving frame; 211, threaded hole; 22, locking piece; 23, column; 3, limiting component; 31, limiting plate; 311, sponge layer; 4, fixed component; 41, suction cup head; 42, connecting pipe; 43, piston head; 44, pull rod; 441, blocking piece; 45, fixing plate; 451, straight plate part; 452, arc part; 46, cylinder. Detailed Description of the Embodiment

[0030] The following will Figures 1-3 further describe the present application in detail.

[0031] An embodiment of the present application discloses an auxiliary fixture for a three - coordinate measuring instrument.

[0032] Refer to Figures 1-3 , an auxiliary fixture for a three - coordinate measuring instrument includes a mounting base 1, a moving component 2, a limiting component 3, and a fixing component 4. The moving component 2 is mounted on the mounting base 1, the limiting component 3 is mounted on the moving component 2, and the fixing component 4 is mounted at the four corners of the bottom of the mounting base 1 for fixing the mounting base 1.

[0033] The fixing component 4 includes a suction cup head 41, a connecting pipe 42, a piston head 43, a pull rod 44, a fixing clamp, and a cylinder 46. The connecting pipe 42 is integrally connected to the mounting base 1 in the vertical direction. The mounting base 1 includes a short beam 11 and a long beam 12. There are two short beams 11, and the two short beams 11 are symmetrically arranged at both ends of the long beam 12 and are connected to the long beam 12 by bolts, and the end of the long beam 12 is located at the center position of the short beam 11.

[0034] The piston head 43 is integrally connected to one end of the pull rod 44, and the piston head 43 extends into the connecting pipe 42. The end of the pull rod 44 away from the piston head 43 extends out of the end of the connecting pipe 42 above the mounting base 1. The cylinder 46 is vertically welded above the mounting base 1, on one side of the connecting pipe 42. The fixing clamp is fixed to the pushing end of the cylinder 46 by bolts, and the end of the fixing clamp away from the cylinder 46 is detachably connected to the pull rod 44.

[0035] The fixing clamp includes two symmetrically arranged fixing plates 45. The fixing plate 45 includes a straight plate portion 451 and an arc portion 452. The straight plate portion 451 is connected to the pushing end of the cylinder 46 by bolts. The two arc portions 452 wrap the pull rod 44 and are then fixed by bolts.

[0036] Refer to Figure 1 , there are two groups of moving components 2. Each group of moving components 2 includes a moving frame 21, a locking member 22, and a column 23. The moving frame 21 is slidably connected to the long beam 12. The locking member 22 is used to fix the moving frame 21 on the long beam 12. The column 23 is fixed to the top of the moving frame 21 by bolts. Threaded holes 211 are opened on both sides of the moving frame 21. The locking member 22 is a bolt, and the bolt fixes the moving frame 21 by connecting with the threaded holes 211. The two groups of moving components 2 are both slidably connected to the long beam 12.

[0037] Refer to Figure 1 , the limiting component 3 includes a plurality of limiting plates 31. The plurality of limiting plates 31 are evenly distributed in the vertical direction at one end of the column 23 away from the moving frame 21 and are located between the two columns 23. In this embodiment, it is disclosed that the number of limiting plates 31 is six, and there are three limiting plates 31 on each column 23. The limiting plates 31 are connected to the column 23 by bolts. One side of the limiting plate 31 away from the column 23 is corrugated, and a sponge layer 311 is pasted on the corrugation.

[0038] The implementation principle of the auxiliary fixture of the coordinate measuring machine in the embodiment of the present application is as follows: when it is necessary to use the auxiliary fixture to fix the workpiece to be measured, first remove the bolt, slide the two moving frames 21 along the long beam 12 to a suitable position, place the workpiece to be measured between the limiting plates 31 on the two columns 23, and fix the workpiece to be measured through the limiting plates 31 on both sides. After the placement position of the workpiece to be measured is adjusted properly, tighten the fixing bolt to fix the moving frame 21. At this time, move the mounting seat 1 onto the coordinate measuring machine. After adjusting the placement position properly, press the short beam 11 by hand to first discharge the air between the suction cup head 41 and the coordinate measuring machine. At this time, control the air cylinder 46 to push upward, drive the pull rod 44 to move upward through the fixed clamp, so as to further suck the suction cup head 41 tightly on the coordinate measuring machine, thereby realizing the fixation of the entire auxiliary fixture. When the measurement work is completed, control the air cylinder 46 to descend. After the air cylinder 46 descends, it will drive the pull rod 44 to descend, so as to re-inject air into the suction cup head 41, thereby releasing the fixation, and no damage will be caused to the coordinate measuring machine during the whole process.

[0039] The above are all the preferred embodiments of the present application, and the protection scope of the present application is not limited accordingly. Therefore, all equivalent changes made according to the structure, shape and principle of the present application shall be covered within the protection scope of the present application.

Claims

1. An auxiliary fixture for a three-coordinate measuring machine, characterized in that: The invention comprises a mounting seat (1), a moving assembly (2), a limiting assembly (3) and a fixing assembly (4), wherein the moving assembly (2) is arranged on the mounting seat (1), the limiting assembly (3) is arranged on the moving assembly (2), and the fixing assembly (4) is arranged at the four corners of the bottom of the mounting seat (1) and is used to fix the mounting seat (1); The fixing assembly (4) comprises a suction cup head (41), a connecting pipe (42), a piston head (43), a pulling rod (44), a fixing clamp and a cylinder (46). The connecting pipe (42) is arranged at the four corners of the mounting seat (1) in the vertical direction. The suction cup head (41) is fixedly connected to one end of the connecting pipe (42) located at the bottom of the mounting seat (1). One end of the pulling rod (44) is fixedly connected to the piston head (43). The piston head (43) is arranged in the connecting pipe (42). One end of the pulling rod (44) away from the piston head (43) extends out of the end of the connecting pipe (42) located above the mounting seat (1). The cylinder (46) is vertically arranged above the mounting seat (1) and located on one side of the connecting pipe (42). The fixing clamp is arranged at the pushing end of the cylinder (46). The end of the fixing clamp away from the cylinder (46) is detachably connected to the pulling rod (44).

2. The auxiliary fixture of a three-dimensional coordinate measuring machine according to claim 1, characterized in that: The fixing clamp comprises two symmetrically arranged fixing plates (45), wherein the fixing plate (45) comprises a straight plate portion (451) and an arc portion (452), wherein the straight plate portion (451) is connected to the cylinder (46), and the arc portion (452) is used to limit the pulling rod (44), and a blocking plate (441) is provided at one end of the pulling rod (44) away from the piston head (43).

3. The auxiliary fixture of a three-dimensional coordinate measuring machine according to claim 1, characterized in that: The mounting seat (1) comprises a short beam (11) and a long beam (12), wherein there are two short beams (11), the two short beams (11) are symmetrically arranged at the two ends of the long beam (12), and the end of the long beam (12) is located at the center of the short beam (11), and the connecting pipe (42) is arranged at the end of the short beam (11).

4. The auxiliary fixture of a three-dimensional coordinate measuring machine according to claim 3, characterized in that: The moving assembly (2) is provided with two groups, each group of the moving assembly (2) comprises a moving frame (21), a locking member (22) and a column (23), the moving frame (21) is provided on the long beam (12), the locking member (22) is used to fix the moving frame (21) on the long beam (12), and the column (23) is provided on the top of the moving frame (21).

5. The auxiliary fixture of a three-dimensional coordinate measuring machine according to claim 4, characterized in that: The movable frame (21) is provided with a threaded hole (211), and the locking member (22) is a bolt, which is threadedly connected in the threaded hole (211).

6. The auxiliary fixture of a three-dimensional coordinate measuring machine according to claim 4, characterized in that: The limiting assembly (3) comprises a plurality of limiting plates (31), and the plurality of limiting plates (31) are evenly distributed along the vertical direction at one end of the column (23) away from the moving frame (21) and are located between two of the columns (23).

7. The auxiliary fixture of a three-dimensional coordinate measuring machine according to claim 6, characterized in that: The side of the limiting plate (31) away from the upright column (23) is corrugated, and a sponge layer (311) is provided on the corrugation.

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