Fixing structure of three-coordinate measuring machine

Abstract

The utility model relates to the technical field of measuring instruments, and discloses a fixing structure of a three-coordinate measuring machine, which comprises a measuring machine body and a three-coordinate measuring mechanism arranged at the top of the measuring machine body, and a measuring platform is arranged at the top of the measuring machine body. A positioning platform capable of being aligned with the three-coordinate measuring mechanism is sleeved with the middle of the measuring platform, a supporting seat is installed in the positioning platform in a sliding mode, and a V-shaped supporting groove is formed in the top of the supporting seat. According to the utility model, the positioning platform and the supporting seat form a fixing structure, after the fixing structure is combined with the measuring platform, the measuring machine body and the three-coordinate measuring mechanism for use subsequently, the fixing structure can provide stable support for the shaft workpiece, and the supporting seat in the fixing structure can drive the shaft workpiece to carry out displacement adjustment in the positioning platform; and different use requirements are met.

Description

Technical Field

[0001] This utility model relates to the field of measuring instrument technology, specifically a fixed structure for a coordinate measuring machine. Background Technology

[0002] A coordinate measuring machine (CMM), also known as a coordinate measuring machine or coordinate measuring machine bed, is an instrument capable of measuring geometric shapes, lengths, and circumferential divisions within a six-sided spatial area. In practical use, the CMM can transmit signals through contact or non-contact methods. Its three-axis displacement measurement system (such as an optical encoder) calculates the data (x, y, z) at various points on the workpiece using a data processor or computer, thus meeting high-precision measurement requirements.

[0003] Currently, during the measurement process of a coordinate measuring machine (CMM), to ensure the stability of the workpiece, a fixed structure adapted to the workpiece is usually installed on the measuring platform to provide auxiliary support. However, judging from the fixed structures disclosed in the existing technology or used by the applicant in reality, most of them are single structures that only perform the support function. They are not very flexible and cannot meet other usage requirements in actual use. Utility Model Content

[0004] To address the shortcomings of existing technologies, this invention provides a fixed structure for a coordinate measuring machine, solving the problems mentioned in the background section.

[0005] This utility model provides the following technical solution: a fixed structure for a coordinate measuring machine, including a measuring machine body and a coordinate measuring mechanism installed on the top of the measuring machine body. A measuring platform is installed on the top of the measuring machine body, and a positioning platform that can be aligned with the coordinate measuring mechanism is fitted inside the middle of the measuring platform. A support seat is slidably installed inside the positioning platform, and a V-shaped support groove is opened in the top of the support seat.

[0006] Preferably, the positioning platform has a second assembly slot inside that can engage with the bottom structure of the support base, and both sides of the top of the positioning platform have clearance slots that communicate with the second assembly slot. The clearance slots are nested with limiting baffles that can be movably connected to the surface of the bottom structure of the support base, and the limiting baffles can constrain the upward movement trend of the support base.

[0007] Preferably, a disassembly space is formed between the rear end of the limiting baffle and the inner wall of the rear end of the second assembly slot, and the support seat that is engaged inside the second assembly slot can be disassembled from the second assembly slot through the disassembly space.

[0008] Preferably, the measuring platform has several combined threaded holes on both sides, and the combined threaded holes are all blind holes. The top of the measuring platform has a first assembly groove that can be engaged with the bottom of the positioning platform.

[0009] The preferred embodiment has a positioning hole on the bottom surface of the positioning platform, a limiting groove that can be aligned with the positioning hole on the top of the measuring platform, and a through hole that allows the two to communicate with each other between the positioning hole and the first assembly groove. An elastic limiting rod that can engage with the positioning hole for limiting is fitted inside the limiting groove.

[0010] The elastic limiting rod includes a support plate, a T-shaped shaft, a folding spring sheet, and a top-pressing bolt. One end of the T-shaped shaft is fitted inside the limiting groove, and the two ends of the folding spring sheet are respectively fixed to the surface of one end of the T-shaped shaft and the inner wall of the limiting groove.

[0011] The support plate is fixed to the top of the measuring platform by screws, and the support plate has a through threaded hole. One end of the top pressure bolt is screwed into the threaded hole and can apply pressure to the T-shaped shaft, so that the other end of the T-shaped shaft can pass through the inner wall of the side of the limiting groove and the through hole and then engage with the positioning hole on the bottom surface of the positioning platform.

[0012] Specifically, the top of the measuring platform is provided with a lead screw drive assembly and a linkage clamping assembly that is connected to the output structure of the lead screw drive assembly. The linkage clamping assembly can clamp the middle structure of the support base and enable the support base to synchronously receive the linear displacement transmission of the lead screw drive assembly.

[0013] The selected screw drive assembly includes a base, a screw, a motor component, and a composite nut. The two ends of the screw are respectively connected to the output end of the motor component and the front end of the base through bearing assembly. The composite nut, as the output structure of the screw drive assembly, meshes with the screw and can perform linear displacement under screw drive.

[0014] The linkage clamping assembly includes a support curved plate, the bottom side of which is snapped with a slide rail installed on the corresponding side of the positioning platform, and the rear end surfaces on both sides of the support curved plate are fixed with internal threaded sleeves, and the inner sides of the two internal threaded sleeves are threaded with I-shaped threaded rods that can make pressure contact with the support seat.

[0015] The composite nut consists of a nut body and a linkage bracket. The two sides of the linkage bracket are respectively fitted onto the outer surface of the nut body and fixed to one side of the support curved plate.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. This utility model has a fixed structure consisting of a positioning platform and a support base. When combined with a measuring platform, a measuring machine body, and a coordinate measuring mechanism, the fixed structure can provide stable support for shaft-type workpieces. The support base in the fixed structure can drive the shaft-type workpieces to adjust their displacement within the positioning platform to meet different usage requirements.

[0018] 2. This utility model uses a limiting baffle as a limiting structure. After being assembled with the above-mentioned fixing structure, the limiting baffle can contact the bottom structure of the support base without interfering with the movement of the support base inside the second assembly slot. Moreover, the upward movement trend of the support base during the repositioning process can be blocked and limited by the limiting baffle, thus fully improving the stability of the displacement.

[0019] 3. By combining the elastic limiting rod with the positioning hole at the bottom of the positioning platform and the limiting groove inside the measuring platform, this utility model can ensure convenient assembly of the positioning platform and the first assembly groove inside the measuring platform. At the same time, it can use the movable structure inside the elastic limiting rod to engage with the limiting groove to easily lock the positioning platform and the measuring platform together, thereby satisfying the modular replacement and installation of the positioning platform and related structures. Attached Figure Description

[0020] Figure 1 This is a front view schematic diagram of the structure of this utility model;

[0021] Figure 2 This is a three-dimensional schematic diagram of the structural measurement platform of this utility model;

[0022] Figure 3 This is a top view of the first assembly slot of the present invention.

[0023] Figure 4 This is a three-dimensional schematic diagram of the structural positioning platform of this utility model;

[0024] Figure 5 This is a top view of the structural positioning platform of this utility model;

[0025] Figure 6 This is a cross-sectional schematic diagram of the elastic limiting rod of the present invention;

[0026] Figure 7 This is a three-dimensional schematic diagram of the lead screw transmission assembly of this utility model;

[0027] Figure 8 This utility model Figure 7 Enlarged diagram of point A in the middle.

[0028] In the diagram: 1. Measuring machine body; 2. Coordinate measuring mechanism; 3. Measuring platform; 4. Positioning platform; 5. Support base; 6. First assembly slot; 7. Combined threaded hole; 8. Second assembly slot; 9. Limiting baffle; 10. Limiting slot; 11. Positioning hole; 12. Elastic limiting rod; 121. Support plate; 122. T-shaft; 123. Folding spring sheet; 124. Top pressure bolt; 13. Shaft-type workpiece; 14. Base; 15. Lead screw; 16. Motor component; 17. Composite nut; 171. Nut body; 172. Linkage bracket; 18. Linkage clamping assembly; 181. Support curved plate; 182. Internal threaded sleeve plate; 183. I-shaped threaded rod. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0030] Please see Figure 1 A fixed structure for a coordinate measuring machine includes a measuring machine body 1, a coordinate measuring mechanism 2 installed on the top of the measuring machine body 1, a measuring platform 3 installed on the top of the measuring machine body 1, and a positioning platform 4 that can be aligned with the coordinate measuring mechanism 2 is fitted inside the middle of the measuring platform 3. A support seat 5 is slidably installed inside the positioning platform 4, and a V-shaped support groove is opened in the top of the support seat 5.

[0031] In use, the shaft workpiece 13 is placed in the V-shaped support groove at the top of the support base 5. After completion, the shaft workpiece 13 is stably supported by the fixed structure formed by the measuring platform 3, the positioning platform 4, and the support base 5. The coordinate measuring mechanism 2 performs multi-point structural accuracy testing on the shaft workpiece 13 to meet the basic testing support requirements.

[0032] Please see Figures 2-4 The positioning platform 4 has a second assembly groove 8 inside that can engage with the bottom structure of the support base 5. Both sides of the top of the positioning platform 4 have clearance grooves that communicate with the second assembly groove 8. A limiting baffle 9 is nested in the clearance groove and can be movably connected to the surface of the bottom structure of the support base 5. The limiting baffle 9 can constrain the upward movement of the support base 5. A disassembly space is formed between the rear end of the limiting baffle 9 and the rear end inner wall of the second assembly groove 8. The support base 5, which is engaged in the second assembly groove 8, can be disassembled from the second assembly groove 8 through the disassembly space.

[0033] In use, considering that the upward movement trend of the support base 5 is unrestricted during the adjustment process of the support base 5 moving back and forth in the second assembly groove 8, the limit baffle 9 is used in conjunction with the second assembly groove 8. Thus, while the limit baffle 9 contacts the bottom structure of the support base 5, it does not interfere with the movement of the support base 5 inside the second assembly groove 8. The upward movement trend of the support base 5 during the adjustment process can be blocked and restricted by the limit baffle 9, which fully ensures the stability of the support base 5 during the adjustment process.

[0034] Furthermore, when the support base 5 experiences significant wear during prolonged use, it can be moved to the disassembly space and then lifted directly to separate the support base 5 from the positioning platform 4. Subsequent new support base 5 can also be reassembled by disassembling the space and engaging with the second assembly slot 8 and the limiting baffle 9.

[0035] Please see Figures 5-6 The measuring platform 3 has several combined threaded holes 7 on both sides, and the combined threaded holes 7 adopt a blind hole structure. The top of the measuring platform 3 has a first assembly groove 6 that can be engaged with the bottom of the positioning platform 4. The bottom surface of the positioning platform 4 has a positioning hole 11. The top of the measuring platform 3 has a limiting groove 10 that can be aligned with the positioning hole 11. A through hole is provided between the positioning hole 11 and the first assembly groove 6 to allow the two to communicate. An elastic limiting rod 12 that can be engaged with the positioning hole 11 is installed inside the limiting groove 10. The elastic limiting rod 12 includes a support plate 121, a T-shaped shaft 122, a folding spring sheet 123, and a top pressure bolt 124. One end of the T-shaped shaft 122 is installed inside the limiting groove 10, and the two ends of the folding spring sheet 123 are respectively fixed to the surface of one end of the T-shaped shaft 122 and the inner wall of the limiting groove 10.

[0036] The support plate 121 is fixed to the top of the measuring platform 3 by screws, and the support plate 121 has a through threaded hole. One end of the top bolt 124 is screwed into the threaded hole and can apply pressure to the T-shaped shaft 122, so that the other end of the T-shaped shaft 122 can pass through the inner wall of the side of the limiting groove 10, the through hole, and then engage with the positioning hole 11 on the bottom surface of the positioning platform 4.

[0037] In use, considering the modular installation and replacement of the fixed structure formed by the positioning platform 4, support base 5, and related structures, the elastic limiting rod 12 is combined with the positioning hole 11 provided on the bottom surface of the positioning platform 4 to meet the requirements. The specific principle is as follows:

[0038] After the positioning platform 4 is engaged with the first assembly slot 6, the top pressure bolt 124 is turned so that the top pressure bolt 124 moves down spirally under the support of the support plate 121 and simultaneously presses the T-shaped shaft 122. The folding spring plate 123 is deformed by the pressure and makes room. Then, the other end of the T-shaped shaft 122 passes through the inner wall of the side of the limiting slot 10 and the through hole and engages with the positioning hole 11 on the bottom surface of the positioning platform 4. In this way, the positioning platform 4 and the measuring platform 3 are combined and limited and locked.

[0039] If the positioning platform 4 or support base 5 and their related structures are damaged, simply turn the top pressure bolt 124 to release the pressure on the T-shaped shaft 122. At the same time, the folding spring plate 123 will use its own reset pressure to automatically disengage the T-shaped shaft 122 from the positioning hole 11, thereby releasing the combined limit lock on the positioning platform 4 and the measuring platform 3. Then, the positioning platform 4 can be directly removed and replaced.

[0040] Please see Figures 7-8 The top of the measuring platform 3 is equipped with a lead screw drive assembly and a linkage clamping assembly 18 that is connected to the output structure of the lead screw drive assembly. The linkage clamping assembly 18 can clamp the middle structure of the support base 5 and enable the support base 5 to synchronously receive the linear displacement transmission of the lead screw drive assembly. The lead screw drive assembly includes a base 14, a lead screw 15, a motor component 16, and a composite nut 17. The two ends of the lead screw 15 are respectively connected to the output end of the motor component 16 and the front end of the base 14 through bearing sets. The composite nut 17, as the output structure of the lead screw drive assembly, is helically meshed with the lead screw 15 and can perform linear displacement under the transmission of the lead screw 15.

[0041] The linkage clamping assembly 18 includes a support curved plate 181. The bottom side of the support curved plate 181 is snapped with a slide rail installed on the corresponding side of the positioning platform 4. The rear end surfaces of both sides of the support curved plate 181 are fixed with internal threaded sleeves 182. The inner sides of the two internal threaded sleeves 182 are threaded with I-shaped threaded rods 183 that can press against the support seat 5. The composite nut 17 is composed of a nut body 171 and a linkage bracket 172. The two sides of the linkage bracket 172 are respectively fitted on the outer surface of the nut body 171 and fixed to one side of the support curved plate 181.

[0042] In practical applications, considering the cumbersome nature of manually adjusting the position of the support base 5 within the positioning platform 4, a screw drive assembly and a linkage clamping assembly 18 are used to automate the movement and adjustment of the support base 5. The specific principle is as follows:

[0043] Tighten the two I-shaped threaded rods 183 inside the linkage clamping assembly 18 until the two I-shaped threaded rods 183 are in contact with the surface of the support seat 5 to apply pressure, thereby using the two I-shaped threaded rods 183 to clamp and assemble the support seat 5.

[0044] As for the displacement adjustment of the support base 5, the motor component 16 is activated, and the output end of the motor component 16 drives the lead screw 15 to rotate synchronously. Then, by utilizing the helical meshing transmission effect of the lead screw 15 and the composite nut 17, the composite nut 17 will drive the linkage clamping component 18 and the support base 5 to perform automatic linear displacement, thereby meeting the automatic displacement adjustment requirements of the support base 5.

[0045] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Additionally, in the accompanying drawings of this utility model, the fill patterns are merely for distinguishing layers and do not constitute any other limitation.

[0046] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A fixed structure for a coordinate measuring machine, comprising a measuring machine body (1) and a coordinate measuring mechanism (2) mounted on top of the measuring machine body (1), characterized in that: The top of the measuring machine body (1) is equipped with a measuring platform (3), and the middle of the measuring platform (3) is fitted with a positioning platform (4) that can be aligned with the coordinate measuring mechanism (2). The positioning platform (4) is slidably installed with a support seat (5), and a V-shaped support groove is opened in the top of the support seat (5).

2. The fixing structure of a coordinate measuring machine according to claim 1, characterized in that: The positioning platform (4) has a second assembly slot (8) inside that can engage with the bottom structure of the support base (5), and the two sides of the top of the positioning platform (4) have clearance slots that are spatially connected to the second assembly slot (8). The clearance slots are nested with limiting baffles (9) that can be movably connected to the bottom structure surface of the support base (5), and the limiting baffles (9) can constrain the upward movement trend of the support base (5).

3. The fixing structure of a coordinate measuring machine according to claim 2, characterized in that: The rear end of the limiting baffle (9) forms a disassembly space with the inner wall of the rear end of the second assembly groove (8), and the support seat (5) that is locked inside the second assembly groove (8) can be disassembled from the second assembly groove (8) through the disassembly space.

4. The fixing structure of a coordinate measuring machine according to claim 1, characterized in that: The measuring platform (3) has several combined threaded holes (7) on both sides, and the combined threaded holes (7) are blind holes. The top of the measuring platform (3) has a first assembly groove (6) that can be engaged with the bottom of the positioning platform (4).

5. The fixing structure of a coordinate measuring machine according to claim 4, characterized in that: The bottom surface of the positioning platform (4) is provided with a positioning hole (11), and the top of the measuring platform (3) is provided with a limiting groove (10) that can be aligned with the positioning hole (11). A through hole is provided between the positioning hole (11) and the first assembly groove (6) to allow the two spaces to communicate. An elastic limiting rod (12) that can engage with and limit the positioning hole (11) is fitted inside the limiting groove (10). The elastic limiting rod (12) includes a support plate (121), a T-shaped shaft (122), a folding spring sheet (123), and a top-pressing bolt (124). One end of the T-shaped shaft (122) is fitted inside the limiting groove (10), and both ends of the folding spring sheet (123) are respectively fixed to the surface of one end of the T-shaped shaft (122) and the inner wall of the limiting groove (10). The support plate (121) is fixed to the top of the measuring platform (3) by screws, and the support plate (121) has a through threaded hole. One end of the top pressure bolt (124) is screwed into the threaded hole and can apply pressure to the T-shaped shaft (122), so that the other end of the T-shaped shaft (122) can pass through the inner wall of the side of the limiting groove (10), the through hole and then be engaged with the positioning hole (11) on the bottom surface of the positioning platform (4).

6. The fixing structure of a coordinate measuring machine according to claim 1, characterized in that: The top of the measuring platform (3) is provided with a lead screw drive assembly and a linkage clamping assembly (18) that is connected to the output structure of the lead screw drive assembly. The linkage clamping assembly (18) can clamp the middle structure of the support base (5) and make the support base (5) synchronously receive the linear displacement transmission of the lead screw drive assembly.

7. The fixing structure of a coordinate measuring machine according to claim 6, characterized in that: The lead screw drive assembly includes a base (14), a lead screw (15), a motor component (16), and a composite nut (17). The two ends of the lead screw (15) are respectively connected to the output end of the motor component (16) and the front end of the base (14) are connected by bearings. The composite nut (17) serves as the output structure of the lead screw drive assembly and is helically engaged with the lead screw (15) and can perform linear displacement under the drive of the lead screw (15). The linkage clamping assembly (18) includes a support curved plate (181), the bottom side of the support curved plate (181) is snapped with a slide rail installed on the corresponding side of the positioning platform (4), and the rear end surfaces on both sides of the support curved plate (181) are fixed with internal threaded sleeves (182), and the inner sides of the two internal threaded sleeves (182) are threaded with I-shaped threaded rods (183) that can press against the support seat (5). The composite nut (17) consists of a nut body (171) and a linkage bracket (172). The two sides of the linkage bracket (172) are respectively fitted on the outer surface of the nut body (171) and fixed to one side of the support curved plate (181).

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