High-precision three-coordinate measuring instrument

Abstract

The utility model relates to the technical field of measuring instrument equipment, in particular to a high-precision three-coordinate measuring instrument, which comprises a measuring table, a horizontal moving mechanism, a transverse moving mechanism, a vertical moving mechanism and a detection head, the transverse moving mechanism is installed on the horizontal moving mechanism, the transverse moving mechanism transversely moves on the horizontal moving mechanism, the vertical moving mechanism is installed on the transverse moving mechanism, the vertical moving mechanism vertically moves on the transverse moving mechanism, and the detection head is installed below the vertical moving mechanism; the number of the gas suspension assemblies is multiple, the multiple gas suspension assemblies are arranged at the butt joint positions among the measuring table, the horizontal moving mechanism, the transverse moving mechanism and the vertical moving mechanism, and the measuring head is driven by the horizontal moving mechanism, the transverse moving mechanism and the vertical moving mechanism to accurately move in three directions on the measuring table.

Description

Technical Field

[0001] The utility model relates to the technical field of measuring instrument equipment, in particular to a high-precision three-coordinate measuring instrument. Background Art

[0002] A three-coordinate measuring instrument is an instrument that can measure geometric shapes, lengths, and circular divisions within a hexahedral space. It is also called a three-coordinate measuring machine or a three-coordinate measuring bed. A three-coordinate measuring instrument can also be defined as "an instrument with a detector that can move in three directions and can move on three mutually perpendicular guide rails. This detector transmits signals in a contact or non-contact manner. The displacement measurement system of the three axes (such as a grating ruler) calculates the various points (x, y, z) of the workpiece and various functional measurements through a data processor or computer." The measurement functions of a three-coordinate measuring instrument should include dimensional accuracy, positioning accuracy, geometric accuracy, and contour accuracy.

[0003] However, the measuring instrument in the prior art generates a large friction force when in use, and the moving accuracy of the measuring instrument will be reduced after long-term operation, thereby affecting the measuring effect of the equipment. Utility Model Content

[0004] In order to solve the problem that the movement accuracy of the above-mentioned measuring instrument will decrease after long-term operation, the utility model provides a high-precision three-coordinate measuring instrument, and the specific technical solution is:

[0005] A high-precision three-dimensional coordinate measuring instrument, comprising a measuring platform, a horizontal moving mechanism, a lateral moving mechanism, a vertical moving mechanism and a detection head, wherein the horizontal moving mechanism is installed on the upper end surface of the measuring platform, the horizontal moving mechanism moves horizontally on the measuring platform, the lateral moving mechanism is installed on the horizontal moving mechanism, the lateral moving mechanism moves horizontally on the horizontal moving mechanism, the vertical moving mechanism is installed on the lateral moving mechanism, the vertical moving mechanism moves vertically on the lateral moving mechanism, and the detection head is installed below the vertical moving mechanism;

[0006] It also includes a gas suspension component, and a plurality of the gas suspension components are arranged at the docking positions between the measuring platform, the horizontal moving mechanism, the lateral moving mechanism, and the vertical moving mechanism.

[0007] In some embodiments, the horizontal moving mechanism includes a horizontal moving frame, a horizontal moving slide and a first power assembly. The horizontal moving slide is fixedly installed on one side of the measuring platform. The lower end surface of the horizontal moving frame is provided with a horizontal groove that matches the horizontal moving slide. The first power assembly is installed on the measuring platform. The first power assembly is transmission-connected to the horizontal moving frame. The first power assembly drives the horizontal moving frame to slide along the horizontal moving slide.

[0008] In some embodiments, an L-shaped limiter is provided on the lower end surface of the horizontal moving frame, and the L-shaped limiter limits the lower end surface of the horizontal moving slide.

[0009] In some embodiments, a number of gas suspension components are arranged on the inner side wall of the horizontal notch, an L-shaped limiter is provided with gas suspension components, and the gas suspension components on the horizontal notch and the L-shaped limiter are in clearance fit with the horizontal moving slide.

[0010] In some embodiments, the horizontal moving frame includes a driving vertical frame, a driven vertical frame and a mounting cross frame. The driving vertical frame and the driven vertical frame are vertically arranged on the measuring table, the mounting cross frame is horizontally arranged between the driving vertical frame and the driven vertical frame, and the horizontal notch is arranged on the lower end surface of the driving vertical frame.

[0011] In some embodiments, a gas suspension component is arranged on the lower end surface of the driven vertical frame, and the gas suspension component arranged on the lower end surface of the driven vertical frame is in clearance fit with the upper end surface of the measuring table.

[0012] In some embodiments, the cross section of the mounting cross frame is triangular. The transverse moving mechanism includes a transverse moving frame and a second power component. A transverse notch that fits with the mounting cross frame is provided on the transverse moving frame. The second power component is arranged on the mounting cross frame. The second power component drives the transverse moving frame to move horizontally on the mounting cross frame. A number of gas suspension components are arranged at the transverse notch, and the gas suspension components on the transverse moving frame are in clearance fit with the outer side wall of the mounting cross frame.

[0013] In some embodiments, the vertical moving mechanism includes a vertical fixed frame, a vertical sliding frame and a third power component. The vertical fixed frame is fixedly installed on the transverse moving frame. The vertical sliding frame is slidably installed in the vertical fixed frame in the vertical direction. A number of gas suspension components are arranged on the inner side wall of the vertical fixed frame. The gas suspension components on the vertical fixed frame are in clearance fit with the outer side wall of the vertical sliding frame. The third power component is installed on the vertical fixed frame. The third power component drives the vertical sliding frame to move in the vertical direction on the vertical fixed frame. The detection head is installed on the lower end surface of the vertical sliding frame.

[0014] In some embodiments, the first power component, the second power component and the third power component have the same structure. The first power component includes a power motor, a driving power wheel, a driven power wheel and a power transmission belt. The driving power wheel and the driven power wheel are rotatably arranged on the measuring table. The power motor is in transmission connection with the driving power wheel. The power transmission belt is sleeved on the driving power wheel and the driven power wheel.

[0015] In some embodiments, the gas suspension assembly includes a suspension block, a suspension nozzle, and a suspension connecting rod. A suspension air hole is provided on one side of the suspension block. The suspension nozzle is fixedly installed at the side end of the suspension block and is connected to the suspension air hole. An embedding groove is provided on the side of the suspension block away from the suspension air hole. One end of the suspension connecting rod is provided with a spherical head, and the spherical head is arranged in the embedding groove.

[0016] Compared with the prior art, the utility model has the following beneficial effects:

[0017] Firstly: In this solution, the detection head is driven by the horizontal movement mechanism to move horizontally on the measuring table, the measuring head is driven by the transverse movement mechanism to move transversely on the measuring table, and the measuring head is driven by the vertical movement mechanism to move vertically on the measuring table, so as to meet the movement of the measuring head in three directions during the measurement process.

[0018] Secondly: In this solution, a gas suspension assembly is provided. A plurality of gas suspension assemblies are arranged at the docking positions between the measuring table, the horizontal movement mechanism, the transverse movement mechanism, and the vertical movement mechanism. By providing the gas suspension assembly, the docking positions between the measuring table, the horizontal movement mechanism, the transverse movement mechanism, and the vertical movement mechanism can be in clearance fit, thereby reducing the friction when the equipment moves, improving the friction when the measuring instrument is in use, and further improving the movement accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is the overall structural schematic diagram of the three-coordinate measuring instrument;

[0020] Figure 2 is the side view of the three-coordinate measuring instrument;

[0021] Figure 3 is Figure 2 the enlarged structural schematic diagram at A in

[0022] Figure 4 is the schematic diagram of the cooperation state of the vertical movement mechanism and the transverse movement mechanism Figure 1 ;

[0023] Figure 5 is the schematic diagram of the cooperation state of the vertical movement mechanism and the transverse movement mechanism Figure 2 ;

[0024] Figure 6 is the internal structural schematic diagram of the vertical sliding frame in the three-coordinate measuring instrument;

[0025] Figure 7 is the structural schematic diagram of the gas suspension assembly in the three-coordinate measuring instrument.

[0026] Reference numerals:

[0027] Measuring table 1, horizontal moving mechanism 2, horizontal moving frame 21, active vertical frame 211, driven vertical frame 212, mounting cross frame 213, horizontal moving slide 22, first power assembly 23, power motor 231, driving power wheel 232, driven power wheel 233, power transmission belt 234, L-shaped limiting member 24, lateral moving mechanism 3, lateral moving frame 31, second power assembly 32, vertical moving mechanism 4, vertical fixing frame 41, vertical sliding frame 42, vertical air cylinder 421, vertical lifting rope 422, lifting piston 423, balancing air nozzle 424, third power assembly 43, detection head 5, gas suspension assembly 6, suspension block 61, suspension air hole 611, suspension air nozzle 62, suspension connecting rod 63. Detailed implementation manners

[0028] The present utility model will be further described in conjunction with the accompanying drawings.

[0029] As Figures 1 to 7 shown, a high-precision three-coordinate measuring instrument includes a measuring table 1, a horizontal moving mechanism 2, a lateral moving mechanism 3, a vertical moving mechanism 4 and a detection head 5. The horizontal moving mechanism 2 is installed on the upper end surface of the measuring table 1. The horizontal moving mechanism 2 moves horizontally on the measuring table 1. The lateral moving mechanism 3 is installed on the horizontal moving mechanism 2. The lateral moving mechanism 3 moves laterally on the horizontal moving mechanism 2. The vertical moving mechanism 4 is installed on the lateral moving mechanism 3. The vertical moving mechanism 4 moves vertically on the lateral moving mechanism 3. The detection head 5 is installed below the vertical moving mechanism 4. The horizontal moving mechanism 2 drives the detection head 5 to move horizontally on the measuring table 1. The lateral moving mechanism 3 drives the measuring head to move laterally on the measuring table 1. The vertical moving mechanism 4 drives the detection head 5 to move vertically on the detection head 5, so as to meet the movement of the measuring head in three directions during the measurement process.

[0030] In some embodiments, a gas suspension assembly 6 is provided in this solution. A plurality of gas suspension assemblies 6 are arranged at the docking positions between the measuring table 1, the horizontal moving mechanism 2, the lateral moving mechanism 3, and the vertical moving mechanism 4. By providing the gas suspension assembly 6, the docking positions between the measuring table 1, the horizontal moving mechanism 2, the lateral moving mechanism 3, and the vertical moving mechanism 4 can be in clearance fit, thereby reducing the friction when the device moves, thereby improving the friction of the measuring instrument during use, and further improving the movement accuracy.

[0031] In some embodiments, the horizontal moving mechanism 2 includes a horizontal moving frame 21, a horizontal moving slide 22 and a first power assembly 23. The horizontal moving slide 22 is fixedly installed on one side of the measuring table 1. A horizontal notch that fits with the horizontal moving slide 22 is provided on the lower end surface of the horizontal moving frame 21. The first power assembly 23 is installed on the measuring table 1, and the first power assembly 23 is drivingly connected to the horizontal moving frame 21. The first power assembly 23 drives the horizontal moving frame 21 to slide along the horizontal moving slide 22.

[0032] In some embodiments, an L-shaped limiting member 24 is provided on the lower end surface of the horizontal moving frame 21, and the lower end surface of the L-shaped limiting member 24 limits the lower end surface of the horizontal moving slide 22.

[0033] In some embodiments, a plurality of gas suspension assemblies 6 are arranged on the inner side wall of the horizontal notch. The L-shaped limiting member 24 is provided with gas suspension assemblies 6. The gas suspension assemblies 6 on the horizontal notch and the L-shaped limiting member 24 are in clearance fit with the horizontal moving slide 22. During use, the L-shaped limiting member 24 is installed on the lower end surface of the horizontal moving frame 21, thereby forming a semi-surrounding structure, which can better wrap and limit the horizontal moving slide 22, thereby improving the operating stability of the device.

[0034] In some embodiments, the horizontal moving frame 21 includes a driving vertical frame 211, a driven vertical frame 212 and an installation cross frame 213. The driving vertical frame 211 and the driven vertical frame 212 are vertically arranged on the measuring table 1. The installation cross frame 213 is horizontally arranged between the driving vertical frame 211 and the driven vertical frame 212. The horizontal notch is provided on the lower end surface of the driving vertical frame 211.

[0035] In some embodiments, a gas suspension assembly 6 is provided on the lower end surface of the driven vertical frame 212. The gas suspension assembly 6 provided on the lower end surface of the driven vertical frame 212 is in clearance fit with the upper end surface of the measuring table 1, which can further improve the stability of the horizontal moving mechanism 2 during horizontal movement.

[0036] In some embodiments, the cross section of the installation cross frame 213 is triangular. The transverse moving mechanism 3 includes a transverse moving frame 31 and a second power assembly 32. A transverse notch that fits with the installation cross frame 213 is provided on the transverse moving frame 31. The second power assembly 32 is provided on the installation cross frame 213. The second power assembly 32 drives the transverse moving frame 31 to move horizontally on the installation cross frame 213. A plurality of gas suspension assemblies 6 are provided at the transverse notch. The gas suspension assemblies 6 on the transverse moving frame 31 are in clearance fit with the outer side wall of the installation cross frame 213. The triangular installation cross frame 213 can further improve the structural strength of the device. At the same time, the triangular installation cross frame 213 can improve the matching stability with the transverse notch.

[0037] In some embodiments, the vertical moving mechanism 4 includes a vertical fixing frame 41, a vertical sliding frame 42 and a third power assembly 43. The vertical fixing frame 41 is fixedly installed on the horizontal moving frame 31. The vertical sliding frame 42 is slidably installed on the vertical fixing frame 41 in the vertical direction. A plurality of gas suspension assemblies 6 are provided on the inner side wall of the vertical fixing frame 41. The gas suspension assemblies 6 on the vertical fixing frame 41 are in clearance fit with the outer side wall of the vertical sliding frame 42. The third power assembly 43 is installed on the vertical fixing frame 41. The third power assembly 43 drives the vertical sliding frame 42 to move vertically on the vertical fixing frame 41. The detection head 5 is installed on the lower end surface of the vertical sliding frame 42.

[0038] In some embodiments, the first power assembly 23, the second power assembly 32 and the third power assembly 43 have the same structure. The first power assembly 23 includes a power motor 231, a driving power wheel 232, a driven power wheel 233 and a power transmission belt 234. The driving power wheel 232 and the driven power wheel 233 are rotatably arranged on the measuring table 1. The power motor 231 is in transmission connection with the driving power wheel 232. The power transmission belt 234 is sleeved on the driving power wheel 232 and the driven power wheel 233. The driving power wheel 232 and the driven power wheel 233 of the second power assembly 32 and the third power assembly 43 are respectively installed on the mounting cross frame 213 and the vertical fixing frame 41.

[0039] In this solution, in order to further improve the lifting stability of the vertical moving mechanism 4, a vertical cylinder 421 is provided in the vertical sliding frame 42. A vertical lifting rope 422 is vertically suspended downward from the top of the vertical fixing frame 41. A lifting piston 423 is fixedly installed at the lower end of the vertical lifting rope 422. The lifting piston 423 is slidably embedded in the vertical cylinder 421. A balance air nozzle 424 is provided at the top of the vertical cylinder 421. The balance air nozzle 424 communicates with the inside of the vertical cylinder 421. When in use, an external air source is connected to the vertical air nozzle, and gas is filled into the vertical cylinder 421 through the external air source. The overall vertical sliding frame 42 is jacked up by the air pressure to balance the stability of the vertical sliding member during movement.

[0040] In some embodiments, the gas suspension assembly 6 includes a suspension block 61, a suspension nozzle 62, and a suspension connecting rod 63. A suspension air hole 611 is provided on one side of the suspension block 61. The suspension nozzle 62 is fixedly installed at the side end of the suspension block 61 and is communicated with the suspension air hole 611. An embedding groove is provided on the side of the suspension block 61 away from the suspension air hole 611. One end of the suspension connecting rod 63 is provided with a spherical head, and the spherical head is arranged in the embedding groove. When in use, an external air source is communicated with the suspension nozzles 62 in each gas suspension assembly 6, and the gas is conveyed into the suspension air holes 611 through the suspension nozzles 62. The high-pressure gas ejected from the suspension air holes 611 forms an air film between the suspension block 61 and the mating surface that needs to slide, so as to reduce the friction between the gas suspension assembly 6 and the mating surface, and further improve the moving stability of the device.

[0041] When this solution is in use, the detection head 5 is driven by the horizontal movement mechanism 2 to move horizontally on the measuring table 1, the measuring head is driven by the lateral movement mechanism 3 to move laterally on the measuring table 1, and the detection head 5 is driven by the vertical movement mechanism 4 to move vertically on the measuring table 1. Among them, the driving motor 231 drives the driving wheel 232 to rotate, the driving wheel 232 drives the power transmission belt 234 to run, and the power transmission belt 234 drives the horizontal moving frame 21, the lateral moving frame 31, and the vertical sliding frame 42 at the corresponding positions to move, so as to control the three-way movement of the detection head 5.

[0042] The technical principle of the present invention has been described above in conjunction with specific embodiments. These descriptions are only for explaining the principle of the present invention and cannot be interpreted in any way as a limitation on the protection scope of the present invention. Based on the explanations herein, those skilled in the art can think of other specific embodiments of the present invention without creative labor, and these embodiments will fall within the protection scope of the claims of the present invention.

Claims

1. A high-precision three-coordinate measuring instrument, characterized in that: The invention comprises a measuring platform (1), a horizontal moving mechanism (2), a lateral moving mechanism (3), a vertical moving mechanism (4) and a detection head (5), wherein the horizontal moving mechanism (2) is mounted on the upper end surface of the measuring platform (1), the horizontal moving mechanism (2) moves horizontally on the measuring platform (1), the lateral moving mechanism (3) is mounted on the horizontal moving mechanism (2), the lateral moving mechanism (3) moves horizontally on the horizontal moving mechanism (2), the vertical moving mechanism (4) is mounted on the lateral moving mechanism (3), the vertical moving mechanism (4) moves vertically on the lateral moving mechanism (3), and the detection head (5) is mounted below the vertical moving mechanism (4); It also comprises a gas suspension assembly (6), wherein a plurality of the gas suspension assemblies (6) are provided, and the plurality of gas suspension assemblies (6) are arranged at the docking positions between the measuring platform (1), the horizontal moving mechanism (2), the lateral moving mechanism (3), and the vertical moving mechanism (4).

2. The high-precision three-dimensional coordinate measuring machine according to claim 1, characterized in that: The horizontal moving mechanism (2) comprises a horizontal moving frame (21), a horizontal moving slide (22) and a first power assembly (23); the horizontal moving slide (22) is fixedly mounted on one side of the measuring platform (1); a horizontal notch matched with the horizontal moving slide (22) is arranged on the lower end surface of the horizontal moving frame (21); the first power assembly (23) is mounted on the measuring platform (1); the first power assembly (23) is transmission-connected to the horizontal moving frame (21); and the first power assembly (23) drives the horizontal moving frame (21) to slide along the horizontal moving slide (22).

3. The high-precision three-dimensional coordinate measuring machine according to claim 2, characterized in that: The lower end surface of the horizontal moving frame (21) is provided with an L-limiting member (24), and the L-limiting member (24) limits the lower end surface of the horizontal moving slide (22).

4. The high-precision three-dimensional coordinate measuring machine according to claim 3, characterized in that: The inner side wall of the horizontal notch is provided with a plurality of gas suspension components (6), the L-limiting member (24) is provided with a gas suspension component (6), and the gas suspension components (6) on the horizontal notch and the L-limiting member (24) are clearance-matched with the horizontal movable slide (22).

5. The high-precision three-dimensional coordinate measuring machine according to claim 4, characterized in that: The horizontal moving frame (21) comprises an active vertical frame (211), a driven vertical frame (212) and a mounting cross frame (213); the active vertical frame (211) and the driven vertical frame (212) are vertically arranged on the measuring platform (1); the mounting cross frame (213) is transversely arranged between the active vertical frame (211) and the driven vertical frame (212); and the horizontal notch is arranged on the lower end surface of the active vertical frame (211).

6. The high-precision three-dimensional coordinate measuring machine according to claim 5, characterized in that: The lower end surface of the driven vertical frame (212) is provided with a gas suspension component (6), and the gas suspension component (6) provided on the lower end surface of the driven vertical frame (212) is clearance-matched with the upper end surface of the measuring platform (1).

7. The high-precision three-dimensional coordinate measuring machine according to claim 6, characterized in that: The cross section of the mounting cross frame (213) is arranged in a triangular shape. The transverse movement mechanism (3) comprises a transverse movement frame (31) and a second power assembly (32). The transverse movement frame (31) is provided with a transverse notch which fits with the mounting cross frame (213). The second power assembly (32) is arranged on the mounting cross frame (213). The second power assembly (32) drives the transverse movement frame (31) to move transversely on the mounting cross frame (213). A plurality of gas suspension assemblies (6) are arranged at the transverse notch. The gas suspension assemblies (6) on the transverse movement frame (31) are clearance-matched with the outer side wall of the mounting cross frame (213).

8. The high-precision three-dimensional coordinate measuring machine according to claim 7, characterized in that: The vertical moving mechanism (4) comprises a vertical fixed frame (41), a vertical sliding frame (42) and a third power assembly (43); the vertical fixed frame (41) is fixedly mounted on the horizontal moving frame (31); the vertical sliding frame (42) is slidably mounted on the vertical fixed frame (41) in the vertical direction; a plurality of gas suspension assemblies (6) are arranged on the inner side wall of the vertical fixed frame (41); the gas suspension assemblies (6) on the vertical fixed frame (41) are clearance-matched with the outer side wall of the vertical sliding frame (42); the third power assembly (43) is mounted on the vertical fixed frame (41); the third power assembly (43) drives the vertical sliding frame (42) to move vertically on the vertical fixed frame (41); and the detection head (5) is mounted on the lower end surface of the vertical sliding frame (42).

9. The high-precision three-dimensional coordinate measuring machine according to claim 8, characterized in that: The first power assembly (23), the second power assembly (32) and the third power assembly (43) have the same structure. The first power assembly (23) comprises a power motor (231), a main power wheel (232), a secondary power wheel (233) and a power transmission belt (234). The main power wheel (232) and the secondary power wheel (233) are rotatably arranged on the measuring platform (1). The power motor (231) is transmission-connected to the main power wheel (232). The power transmission belt (234) is sleeved on the main power wheel (232) and the secondary power wheel (233).

10. The high-precision three-dimensional coordinate measuring machine according to claim 9, characterized in that: The gas suspension component (6) comprises a suspension block (61), a suspension gas nozzle (62) and a suspension connecting rod (63); a suspension gas hole (611) is provided on one side of the suspension block (61); the suspension gas nozzle (62) is fixedly mounted on the side end of the suspension block (61); the suspension gas nozzle (62) is connected to the suspension gas hole (611); an embedding groove is provided on the side of the suspension block (61) away from the suspension gas hole (611); a ball head is provided at one end of the suspension connecting rod (63) for insertion; the ball head is arranged in the embedding groove.

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